Interference mitigation by transmitting on a second, lower, power level
26 claims: 14 independent, 12 dependent
- 1下記を具備する、無線通信ネットワークにおける通信方法、 第1の基地局によって、第1の送信パワーレベルで、第1のキャリアで通信することと、ここにおいて、前記第1のキャリアはダウンリンク用であり、前記第1のキャリアで通信することは、第1のユーザ機器(UE)および第2のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、制御情報を送ること、および前記第1のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、第1のデータ送信を送ることを備える、 前記第1の基地局によって、第2の送信パワーレベルで、第2のキャリアで通信することであって、前記第2の送信パワーレベルは、前記第2のキャリアで通信する第2の基地局への干渉を低減するために、前記第1の送信パワーレベルよりも低く、前記第1および第2の基地局は、異なるパワークラスに属するか、異なるアソシエーションタイプをサポートする、こと、ここにおいて、前記第2のキャリアはダウンリンク用であり、前記第2のキャリアで通信することは、前記第2のUEに、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のデータ送信を送ることを備える。
- 2前記第1のキャリアは、第1のパワークラスの前記第1の基地局に割り当てられ、前記第2のキャリアは、前記第1のパワークラスとは異なる第2のパワークラスの前記第2の基地局に割り当てられている、請求項1に記載の方法。
- 3前記第1のキャリアは、制限のないアクセスの前記第1の基地局に割り当てられ、前記第2のキャリアは、制限されたアクセスの前記第2の基地局に割り当てられている、請求項1に記載の方法。
- 4前記第1および第2のキャリアがアップリンク用であり、前記第1のキャリアで通信することが、前記第1の送信パワーレベルで、前記第1のキャリアで、第1のユーザ機器(UE)によって送られる第1のデータ送信を受信することを含み、前記第2のキャリアで通信することが、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のUEによって送られる第2のデータ送信を受信することを含む、請求項1に記載の方法。
- 5前記第1のキャリアで通信することは、前記第1のキャリアで、前記第1のUEから、制御情報を受信することをさらに含み、前記第2のキャリアで通信することは、前記第2のキャリアで、前記第2のUEから制御情報を受信することをさらに含む、請求項4に記載の方法。
- 6前記第2の基地局による通信のために、前記第2のキャリアの使用を決定するために、前記第2の基地局とシグナリングを交換すること をさらに含む、請求項1に記載の方法。
- 7前記第2の基地局による使用のために、前記第1のキャリアの一部を予約することと、 前記第1の基地局による通信のために、前記第1のキャリアの残りの一部を使用すること とをさらに含む、請求項1に記載の方法。
- 8前記第1の基地局のために、前記第2の基地局によって予約された前記第2のキャリアの一部を決定することと、 前記第1の基地局によって、前記第1の送信パワーレベルで、前記第2のキャリアの前記予約された一部で通信すること とをさらに含む、請求項1に記載の方法。
- 9前記第1の基地局によって、前記第1および第2のキャリアのそれぞれで、少なくとも1つの同期信号を送ること をさらに含む、請求項1に記載の方法。
- 10前記第1の基地局によって、第3の送信パワーレベルで、第3のキャリアで通信することと、 前記第1の基地局によって、第4の送信パワーレベルで、第4のキャリアで通信することであって、前記第4の送信パワーレベルは、前記第4のキャリアでの干渉を低減するために、前記第3の送信パワーレベルよりも低く、前記第1および第2のキャリアは、ダウンリンクでの通信のために使用され、前記第3および第4のキャリアは、アップリンクでの通信のために使用される、こと とをさらに含む、請求項1に記載の方法。
- 11前記第2の基地局または前記無線ネットワークにとっての、割り当てられるキャリアの数、および、割り当てられたキャリアがいつ有効であるのかを示すスケジュールに基づいて、前記第2のキャリアでの送信パワーを低減するかどうかを決定すること をさらに含む、請求項1に記載の方法。
- 12前記第1のキャリアが使用を禁止されていないことを示す情報を同報することと、 前記第2のキャリアが使用を禁止されていることを示す情報を同報すること とをさらに含む、請求項1に記載の方法。
- 13前記第1のキャリアを介して前記第1の基地局にアクセスする少なくとも1つのユーザ機器(UE)を識別することと、 前記第1のキャリアから前記第2のキャリアに、前記少なくとも1つのUEを割り振ること とをさらに含む、請求項1に記載の方法。
- 14下記を具備する、無線通信のための装置、 第1の基地局によって、第1の送信パワーレベルで、第1のキャリアで通信するための手段と、ここにおいて、前記第1のキャリアはダウンリンク用であり、前記第1のキャリアで通信するための前記手段は、第1のユーザ機器(UE)および第2のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、制御情報を送るための手段、および前記第1のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、第1のデータ送信を送るための手段を備える、 前記第1の基地局によって、第2の送信パワーレベルで、第2のキャリアで通信するための手段であって、前記第2の送信パワーレベルは、前記第2のキャリアで通信する第2の基地局への干渉を低減するために、前記第1の送信パワーレベルよりも低く、前記第1および第2の基地局は、異なるパワークラスに属するか、異なるアソシエーションのタイプをサポートする、手段、ここにおいて、前記第2のキャリアはダウンリンク用であり、前記第2のキャリアで通信するための前記手段は、前記第2のUEに、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のデータ送信を送るための手段を備える。
- 15前記第2の基地局による使用のために、前記第1のキャリアの一部を予約するための手段と、 前記第1の基地局による通信のために、前記第1のキャリアの残りの一部を使用するための手段 とをさらに含む、請求項14に記載の装置。
- 16下記を具備する、無線通信のための装置、 第1の基地局によって、第1の送信パワーレベルで、第1のキャリアで通信し、かつ、前記第1の基地局によって、第2の送信パワーレベルで、第2のキャリアで通信するように構成され、前記第2の送信パワーレベルは、前記第2のキャリアで通信する第2の基地局への干渉を低減するために、前記第1の送信パワーレベルよりも低く、前記第1および第2の基地局は、異なるパワークラスに属するか、異なるアソシエーションのタイプをサポートする、少なくとも1つのプロセッサ ここにおいて、前記第1および第2のキャリアがダウンリンク用であり、前記第1のキャリアで通信するように構成される前記少なくとも1つのプロセッサは、第1のユーザ機器(UE)および第2のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、制御情報を送るように構成される少なくとも1つのプロセッサ、および前記第1のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、第1のデータ送信を送るように構成される少なくとも1つのプロセッサを備え、前記第2のキャリアで通信するように構成される前記少なくとも1つのプロセッサは、前記第2のUEに、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のデータ送信を送るように構成される少なくとも1つのプロセッサを備える。
- 17前記少なくとも1つのプロセッサは、前記第2の基地局による使用のために、前記第1のキャリアの一部を予約し、かつ、前記第1の基地局による通信のために、前記第1のキャリアの残りの一部を使用するように構成されている、請求項16に記載の装置。
- 18下記を記憶しているコンピュータ可読記憶媒体、 第1の基地局によって、第1の送信パワーレベルで、第1のキャリアで、通信するように、少なくとも1つのコンピュータにさせるためのコードと、ここにおいて、前記第1のキャリアはダウンリンク用であり、前記第1のキャリアで通信するように前記少なくとも1つのコンピュータにさせるための前記コードは、第1のユーザ機器(UE)および第2のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、制御情報を送るように前記少なくとも1つのコンピュータにさせるためのコード、および前記第1のUEに、前記第1の送信パワーレベルで、前記第1のキャリアで、第1のデータ送信を送るように前記少なくとも1つのコンピュータにさせるためのコードを備える、 前記第1の基地局によって、第2の送信パワーレベルで、第2のキャリアで、通信するように、前記少なくとも1つのコンピュータにさせるためのコードであって、前記第2の送信パワーレベルは、前記第2のキャリアで通信する第2の基地局への干渉を低減するために、前記第1の送信パワーレベルよりも低く、前記第1および第2の基地局は、異なるパワークラスに属するか、異なるアソシエーションのタイプをサポートする、コード、ここにおいて、前記第2のキャリアはダウンリンク用であり、前記第2のキャリアで通信するように前記少なくとも1つのコンピュータにさせるための前記コードは、前記第2のUEに、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のデータ送信を送るように前記少なくとも1つのコンピュータにさせるためのコードを備える。
- 19下記を具備する、無線通信ネットワークで通信する方法、 第1の送信パワーレベルで、第1のキャリアで、および、第2の送信パワーレベルで、第2のキャリアで、動作する第1の基地局を検出することであって、前記第2の送信パワーレベルは、前記第2のキャリアで動作する第2の基地局への干渉を低減するために、前記第1の送信パワーレベルよりも低く、前記第1および第2の基地局は、異なるパワークラスに属するか、異なるアソシエーションのタイプをサポートする、ことと、 前記第1の送信パワーレベルで、前記第1のキャリアで、または、前記第2の送信パワーレベルで、前記第2のキャリアで、または、その両方で、前記第1の基地局と通信すること ここにおいて、前記第1のキャリアで前記第1の基地局と通信することは、前記第1の送信パワーレベルで、前記第1のキャリアで、制御情報、または、第1のデータ送信、または、制御情報と第1のデータ送信の両方を通信することを備え、前記第2のキャリアで通信することは、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のデータ送信を通信することを備える。
- 20前記第1の基地局と通信することは、 前記第1および第2のキャリアの各々の受信信号品質を決定することと、 より高い受信信号品質を有する前記第1または第2のキャリアを選択することと、 前記選択されたキャリアで、前記第1の基地局と通信すること とを含む、請求項 19 に記載の方法。
- 21前記第1の基地局と通信することは、 前記第2のキャリアでの干渉が、閾値を上回る場合に、前記第1のキャリアを選択することと、 前記第2のキャリアでの干渉が、閾値を下回る場合に、前記第2のキャリアを選択することと、 前記選択されたキャリアで、前記第1の基地局と通信すること とを含む、請求項 19 に記載の方法。
- 22前記第1の基地局と通信することは、 通信のために、前記第1または第2のキャリアを選択することと、 前記第1の基地局と、前記選択されたキャリアで、制御情報を交換することと、 前記第1の基地局と、前記選択されたキャリアで、データを交換すること とを含む、請求項 19 に記載の方法。
- 23前記第1の基地局と通信することは、 前記第1の基地局と、前記第1のキャリアで、制御情報を交換することと、 前記第1の基地局と、前記第2のキャリアで、データを交換すること とを含む、請求項 19 に記載の方法。
- 24前記第1の基地局を検出することは、 前記第1の基地局を含む複数の基地局から、前記第1または第2のキャリアで、信号を受信することと、 前記受信された信号に基づいて、前記複数の基地局の中から、通信のために、前記第1の基地局を選択すること とを含む、請求項 19 に記載の方法。
- 25下記を具備する、無線通信のための装置、 第1のキャリアで、第1の送信パワーレベルで、および、第2のキャリアで、第2の送信パワーレベルで、動作する第1の基地局を検出するための手段であって、前記第2の送信パワーレベルは、前記第2のキャリアで動作する第2の基地局への干渉を低減するために、前記第1の送信パワーレベルよりも低く、前記第1および第2の基地局は、異なるパワークラスに属するか、異なるアソシエーションのタイプをサポートする、手段と、 前記第1のキャリアで、前記第1の送信パワーレベルで、または、前記第2のキャリアで、前記第2の送信パワーレベルで、または、両方で、前記第1の基地局と通信するための手段 ここにおいて、前記第1のキャリアで前記第1の基地局と通信するための前記手段は、前記第1の送信パワーレベルで、前記第1のキャリアで、制御情報、または、第1のデータ送信、または、制御情報と第1のデータ送信の両方を通信するための手段を備え、前記第2のキャリアで通信するための前記手段は、前記第2の送信パワーレベルで、前記第2のキャリアで、第2のデータ送信を通信するための手段を備える。
- 26前記第1の基地局と通信するための手段は、 通信のために、前記第1または第2のキャリアを選択するための手段と、 前記第1の基地局と、前記選択されたキャリアで、制御情報を交換するための手段と、 前記第1の基地局と、前記選択されたキャリアで、データを交換するための手段 とを含む、請求項 25 に記載の装置。
Independent claims26
97 paragraphs, as filed
<u style="single">This application is incorporated herein by reference and assigned to this assignee, the US provisional application number, entitled "FLEXIBLE MULTICARRIER COMMUNICATION SYSTEM," filed June 27, 2008. Claim the priority of No. 61 / 076,366.</u> The present disclosure relates generally to communications and, more specifically, to techniques for communicating over wireless communication networks.
Wireless communication networks are widely deployed to supply various communication contents such as voice, video, packet data, messaging, broadcasting, and the like. These wireless networks can be multiple access networks that can support multiple users by sharing available network resources. Examples of such multiple access networks are code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, and single carrier FDMA (SC). -FDMA) Includes networks.
A wireless communication network can include a large number of base stations that can support communication for a large number of user equipments (UEs). The UE can communicate with the base station via downlinks and uplinks. A downlink (ie, forward link) refers to a communication link from a base station to a UE, and an uplink (ie, reverse link) refers to a communication link from a UE to a base station.
The base station can transmit data and control information downlink to the UE and / or receive data and control information uplink from the UE. In the downlink, transmission from a base station can observe interference due to transmission from an adjacent base station. On the uplink, transmissions from UEs can observe interference from transmissions from other UEs communicating with neighboring base stations. Interference can degrade performance, both downlink and uplink.
Techniques for communicating with multiple carriers in a wireless communication network are described herein. A carrier can be a range of frequencies that can be used for communication and can be defined by a particular center frequency and a particular bandwidth. Carriers are separated from adjacent carriers by guard bands and may have other attributes as described below. Multiple carriers can be used to support communications in dominant interference scenarios, where interference stronger than the interfering base stations and / or interfering UEs can be observed.
In one aspect, different transmit power levels can be used for different carriers to reduce interference and achieve good overall performance. In one example, the first base station may be assigned one or more carriers among the plurality of carriers available for communication. The second base station is assigned one or more carriers that are not assigned to the first base station. The first base station may communicate with each assigned carrier at the first (eg, maximum) transmit power level. The first base station can communicate with each unassigned carrier at the second transmit power level, which is the first transmit power level to reduce interference with the second base station. Can be lower than. The first and second base stations can belong to different power classes. For example, a first base station can be a high power base station, while a second base station can be a lower power base station. Or vice versa. The first and second base stations may also support different association / access types. For example, a first base station may support unrestricted access, while a second base station may support restricted access. Or vice versa. Communication with multiple carriers may be supported, as described below.
In another embodiment, the control information may be sent on a designated carrier to support communication on at least one other carrier. Stations (eg, base stations or UEs) can communicate with at least one carrier. The station may exchange control information (eg, send or receive) on the designated carrier for communication on at least one carrier. Control information may include scheduling grants or assignments, channel quality indicator (CQI) information, acknowledgment (ACK) information, and the like. Control information can be sent at a higher transmit power level with a specified carrier, which improves certainty.
In yet another embodiment, auto-configuration may be performed to select a suitable carrier for communication. The station (eg, base station or UE) may determine a metric for each of the multiple carriers available for communication. The metric may include at least one parameter other than signal strength, such as received signal quality, path loss, and the like. The station may select a carrier for communication from a plurality of carriers based on the metric for each carrier. The station can then communicate with the carrier of choice. In one example, both data and control information can be exchanged (eg, sent or received) via selected carriers. In another example, control information can be exchanged via a selected carrier and data can be exchanged via a selected carrier and / or another carrier.
In yet another embodiment, the base station may broadcast bar information indicating the status of the carrier. The base station can determine bar information for each carrier. In one example, bar information for each carrier may indicate whether the carrier is banned from use. In another example, bar information about a given carrier may indicate that the carrier is not banned in the first UEs set, but is banned in the second UEs set. The bar information for each carrier may also include other information that can be used to control communications and access on that carrier. Base stations can broadcast bar information to UEs, which can be used to determine access to the base station.
The various aspects and features of the disclosure are described in more detail below.
<figref num="1">It is a figure which shows the wireless communication network.</figref><figref num="2">It is a figure which shows the carrier structure of a single carrier.</figref><figref num="3A">It is a figure which shows the carrier structure of a plurality of carriers.</figref><figref num="3B">It is a figure which shows the carrier structure of a plurality of carriers.</figref><figref num="4">It is a figure which shows the operation with two carriers by a macro base station, and the operation with one of two carriers by a pico or femto base station.</figref><figref num="5">It is a figure which shows the communication with a plurality of downlinks and uplink carriers.</figref><figref num="6">It is a figure which shows the process for communication with a plurality of carriers by a base station.</figref><figref num="7">It is a figure which shows the apparatus for communication with a plurality of carriers by a base station.</figref><figref num="8">It is a figure which shows the process for communication with the carrier assigned by a base station.</figref><figref num="9">It is a figure which shows the apparatus for communication with the carrier assigned by a base station.</figref><figref num="10">It is a figure which shows the process for communication by UE.</figref><figref num="11">It is a figure which shows the apparatus for communication by UE.</figref><figref num="12">It is a figure which shows the process for communication by a plurality of carriers which control information is sent by a single carrier.</figref><figref num="13">It is a figure which shows the apparatus for communication with a plurality of carriers which control information is sent with a single carrier.</figref><figref num="14">It is a figure which shows the process for communication with the carrier selected by the automatic setting.</figref><figref num="15">It is a figure which shows the apparatus for communication with the carrier selected by the automatic setting.</figref><figref num="16">It is a figure which shows the process for broadcasting bar information by a base station.</figref><figref num="17">It is a figure which shows the apparatus for broadcasting bar information by a base station.</figref><figref num="18">It is a block diagram of a base station and a UE.</figref>
Detailed explanation
The techniques described herein can be used for various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are often used interchangeably. CDMA networks are Universal Terrestrial Radio Access: UTRA), cdma2000, and other wireless technologies can be realized. UTRA includes wideband CDMA (WCDMA) and other different CDMAs. cdma2000 covers IS-2000, IS-95 and IS-856 standards. TDMA networks can implement wireless technologies such as global systems (GSM®) for mobile communications. OFDMA networks include wireless UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE802.20, Flash-OFDM®, etc. Technology can be realized. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in a document by an organization called the "Third Generation Partnership Project" (3GPP). cdma2000 and UMB are described in a document by an organization called "Third Generation Partnership Project 2" (3GPP2). The techniques described herein can be used not only for the wireless networks and wireless techniques described above, but also for other wireless networks and wireless techniques. Clearly, certain aspects of these techniques are described below for LTE, and LTE techniques are used in most of the descriptions below.
FIG. 1 shows a wireless communication network 100, which can be an LTE network, or some other network. The wireless network 100 may include a large number of evolved Node Bs (eNBs) 110 and other network entities. The eNB can be a station that communicates with UEs, and can also be called a base station, a node B, an access point, or the like. Each eNB 110 may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may also refer to the coverage area of eNB and / or the eNB subsystem that serves this coverage area, depending on the context in which the term is used.
The eNB may provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. Macrocells can cover a relatively large geographic area (eg, a few kilometers in radius) and allow unlimited access by serviced UEs. Picocell can cover a relatively small geographic area and allow unlimited access by serviced UEs. Femtocells cover a relatively small geographic area (eg, a house) and have UEs (eg, Closed Subscriber) associated with the femtocell. Group: CSG) UEs, UEs home users, etc.) can allow restricted access. The macro cell eNB may be referred to as the macro eNB. The picocell eNB can be called a pico eNB. The femtocell eNB may be referred to as the femto eNB or home eNB. In the example shown in FIG. 1, the eNBs 110a, 110b, and 110c can be macro eNBs in macro cells 102a, 102b, and 102c, respectively. eNB110x can be a pico eNB of picocell 102x. The eNB 110y and 110z can be femto eNBs or home eNBs of femtocells 102y and 102z, respectively. The eNB may support one or more (eg, 3) cells.
The wireless network 100 may further include a relay station, for example, a relay station 110r. The relay station receives the transmission of data and / or other information from the upstream station (eg, eNB or UE) and sends the transmission of data and / or other information to the downstream station (eg, UE or eNB). It is a station. The relay station may also be a UE that relays the transmission of other UEs. Relay stations are also sometimes referred to as relay eNBs, repeaters, etc.
The wireless network 100 may be a homologous network containing only one type of eNB, for example, a macro eNB or only a femto eNB. The wireless network 100 may also be a heterogeneous network that includes various types of eNBs, such as macro eNBs, pico eNBs, femto eNBs, repeaters, and the like. Different types of eNBs can have different transmission power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, macro eNBs can have high transmit power levels (eg 20 watts), while pico eNBs, femto eNBs, and repeaters can have lower transmit power levels (eg 1 watt). The techniques described herein can be used for both homogenous and heterogeneous networks. These techniques can be used for different types of eNBs and repeaters.
The wireless network 100 may support synchronous or asynchronous operation. In synchronous operation, the eNBs have similar frame timings, and transmissions from various eNBs can be aligned in time. In asynchronous operation, eNBs have various frame timings, and transmissions from various eNBs cannot be aligned in time. The techniques described herein can be used for both synchronous and asynchronous operations.
The network controller 130 may be connected to a set of eNBs to provide coordination and control to these eNBs. The network controller 130 can communicate with the eNBs 110 via a backhaul. In addition, the eNBs 110 may communicate with each other, for example, via a wireless or wired backhaul.
The UEs 120 may be distributed throughout the wireless network 100, and each UE may be fixed or movable. UEs are sometimes referred to as terminals, mobile stations, subscriber units, stations, etc. The UE can be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless telephone, a wireless local loop (WLL) station, and the like. The UE may be able to communicate with macro eNBs, pico eNBs, femto eNBs, repeaters, etc. In Figure 1, the solid double-headed arrow indicates the desired transmission between the UE and the eNB servicing, which is the eNB designated to serve the UE on the downlink and / or uplink. The dashed double-headed arrow indicates interfering transmission between the UE and eNB.
The wireless network 100 may support operation with configurable system bandwidth. For example, wireless network 100 can be an LTE network that supports operation over a system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz (MHz). System bandwidth can be divided into subbands. For example, one subband may cover 1.08MHz, so the system bandwidth of 1.25, 2.5, 5, 10 or 20MHz has 1, 2, 4, 8 or 16 subbands, respectively. sell.
FIG. 2 shows an example of a carrier structure 200 that supports communication with a single downlink carrier. The downlink carrier has a BW bandwidth and frequency f<sub>c</sub>Can be centered on. The eNB may transmit a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) for each cell of the eNB. Synchronous signals can be used by UEs for cell detection and capture. eNB also has Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical HARQ Indicator Channel (PHICH) and Physical Down in LTE. Link Control Channel (Physical Downlink Control) Various control channels such as Channel: PDCCH) can be transmitted. PBCH can carry certain system information. PCFICH can convey the number of symbol periods (M) used for the control channel in one subframe. PHICH may carry ACK information to support hybrid automatic retransmission (HARQ). The PDCCH can carry control information such as scheduling grants for UEs for downlink and uplink data transmission. eNB also provides Physical Downlink Shared in LTE. Channel: PDSCH) can transmit one or more data channels. PDSCH may carry data for UEs scheduled for downlink data transmission. The eNB is a central 1.08MHz downlink carrier capable of transmitting PSS, SSS and PBCH. The eNB may transmit PCFICH, PHICH and PDSCH over all or part of the downlink carrier during each symbol period during which these channels are transmitted.
The UE can be within the coverage of multiple eNBs. One of these eNBs may be selected to serve its UE. The eNB to be serviced can be selected based on various criteria such as received signal quality, path loss, etc. The received signal quality can be determined by the signal-to-noise ratio (SNR), carrier-to-interference ratio (C / I), and the like.
A UE may operate in a dominant interference scenario, in which the UE can observe strong interference from one or more interfering eNBs. Dominant interference scenarios can occur with limited associations. For example, in FIG. 1, the UE120y can approach the femto eNB110y and have a higher receive power than the eNB110y. However, the UE120y cannot make the femto eNB110y accessible due to limited associations, and the lower receive power macro eNB110c (as shown in Figure 1), or also lower. It can be connected to the receiving power femto eNB 110z (not shown in Figure 1). The UE120y can then observe strong interference from the femto eNB110y on the downlink and can cause strong interference with the eNB110y on the uplink.
In addition, the dominant interference scenario can also be caused by range expansion, which is the scenario in which the UE is connected to an eNB with less path loss and lower SNR of all the eNBs detected by the UE. .. For example, in FIG. 1, the UE120x can detect the macro eNB110b and the pico eNB110x and have a lower receive power than the eNB110b for the eNB110x. Nevertheless, if the path loss of the eNB 110x is less than the path loss of the macro eNB 110b, it may be desirable for the UE 120x to connect to the pico eNB 110x. This can result in less interference to the wireless network for the UE 120x for a given data rate. Range expansion can also be used for repeaters.
In some embodiments, communication in a dominant interference scenario can be supported by using multiple carriers and assigning eNBs to different carriers to achieve good performance. In general, any number of carriers can be used for the downlink and uplink respectively. The number of carriers can depend on various factors such as the bandwidth of the system, the desired or required bandwidth of each carrier, and so on. Available carriers can be assigned to eNBs in a variety of ways, as described below.
FIG. 3A shows an example of a carrier structure 300 that supports communication on two downlink carriers 1 and 2. The system bandwidth BW is divided into two carriers, each downlink carrier can have a BW / 2 bandwidth. For example, a 10MHz system bandwidth can be split into two 5MHz carriers. In general, the system bandwidth may be evenly or unevenly divided, and the downlink carriers may have the same or different bandwidths.
In one example, two downlink carriers can be assigned to eNBs of different power classes. High power eNBs (eg macro eNBs) are assigned one downlink carrier (eg carrier 1) and lower power eNBs (eg pico and femto eNBs) are assigned the other downlink carrier (eg carrier 1). Carrier 2) can be assigned. In another example, the two downlink carriers can be assigned to eNBs of different association / access types. Unrestricted eNBs (eg macro and pico eNBs) are assigned one downlink carrier (eg carrier 1) and restricted eNBs (eg femto eNBs) are assigned to the other downlink carrier (eg carrier 1). 2) can be assigned. The two carriers may be assigned to eNBs in other ways.
FIG. 3B shows an example of a carrier structure 310 that supports communication with M downlink carriers 1 to M, where M can be greater than 2. The bandwidth BW of the system is divided into M equal parts, and each downlink carrier can have a bandwidth of BW / M. For example, a 10MHz system bandwidth can be split into four 2.5MHz carriers. In general, the bandwidth of a system can be evenly or unevenly divided into M parts. M downlink carriers can have the same or different bandwidths. For example, a 10MHz system bandwidth is (i) four 2.5MHz carriers, (ii) one 5MHz carrier and two 2.5MHz carriers, (iii) eight 1.25MHz carriers, (iv) one. It can be divided into 5 MHz carriers, one 2.5 MHz carrier, and two 1.25 MHz carriers, or (v) some other combination of carriers.
M downlink carriers can be assigned to eNBs in various ways. In one example, eNBs of different power classes may be assigned different downlink carriers. In another example, eNBs of different association types may be assigned different downlink carriers. In yet another example, eNBs that cause strong interference with each other can be assigned different downlink carriers. For example, a 10MHz system bandwidth can be split into one 5MHz carrier and two 2.5MHz carriers. In the example shown in FIG. 1, the macro eNB110c may be assigned a 5 MHz carrier, the femto eNB110y may be assigned a 2.5 MHz carrier, and the femto eNB110z may be assigned another 2.5 MHz carrier.
In general, eNBs can be assigned one or more downlink carriers. In one example, the eNB may transmit at maximum power in each assigned downlink carrier. In one example, the eNB may transmit at a lower power level to avoid transmitting on each unassigned downlink carrier or to reduce interference with other eNBs to which this carrier is assigned. .. In this way, the eNB may transmit at different power levels for the assigned carrier and the unassigned carrier. In general, assigned carriers may use higher transmit power, and unallocated carriers may use lower (or zero) transmit power. For each eNB, the assigned carrier may have less interference from other eNBs than the unassigned carrier.
FIG. 4 shows an exemplary operation by macro eNB on two downlink carriers 1 and 2. The horizontal axis may represent frequency and the vertical axis may represent transmission power. The macro eNB is assigned the downlink carrier 1 and can transmit with the maximum power in this carrier. The macro eNB can transmit at a lower power level on the downlink carrier 2 (as shown in Figure 4) to reduce interference with other eNBs to which the carrier 2 is assigned. , Can be avoided by carrier 2 (not shown in Figure 4).
FIG. 4 also shows exemplary behavior with pico or femto eNBs for examples where two downlink carriers 1 and 2 are available. The pico or femto eNB is assigned a downlink carrier 2 and can transmit at maximum power on this carrier. The pico or femto eNB can avoid transmitting on the downlink carrier 1 (as shown in Figure 4), or to reduce interference with the macro eNB to which the carrier 1 is assigned (as shown in Figure 4). Carrier 1 (not shown in Figure 4) can transmit at lower power levels.
The example shown in Figure 4 can also support communication in a restricted association scenario, where the femto eNB is assigned downlink carrier 2. UEs within the femto eNB range can be connected to the macro eNB on the downlink carrier 1 and avoid strong interference from the femto eNB on the downlink carrier 2. The example shown in Figure 4 can also support communication in range expansion scenarios, with the Pico eNB assigned downlink carrier 2. UEs within the range of the pico eNB can be connected to the pico eNB by the downlink carrier 2 and can avoid strong interference from the macro eNB in the downlink carrier 1.
In one example, the available downlink carriers can be assigned to eNBs in a dynamic and flexible way. Available downlink carriers are assigned to eNBs based on one or more metrics, which can be related to network performance, UE performance, etc.
In one example, downlink carriers can be assigned to eNBs based on a given schedule. The schedule can indicate the number of downlink carriers assigned to the various eNBs and when the assigned downlink carriers are valid. Schedules can be generated by network operators for good performance. For example, four downlink carriers are available, three downlink carriers are assigned to macro eNBs during the day, more people are at home and use their femto eNBs. Three downlink carriers may be assigned to femto eNBs at night when expected.
In another example, the eNBs may communicate with each other to allocate downlink carriers between these eNBs. For example, a macro eNB (or network entity) may assign downlink carriers to itself and its neighbors so that they can take the load of the neighbors and achieve good performance.
In one example, one downlink carrier may be designated as the eNB downlink anchor carrier. A downlink anchor carrier can have one or more of the following attributes: · Can be transmitted with maximum power by eNB, There is little interference from other eNBs, -Carrying the sync signal used for capture, · Carrying control information for data transmission on anchor carriers and / or other carriers, · Supports communication of UEs that can operate on a single carrier, and -It can be a downlink carrier suitable for operation.
In one example, one uplink carrier may be designated as the eNB uplink anchor carrier. Uplink anchor carriers can have one or more of the following attributes: · Less interference from other UEs serviced by other eNBs, · Carrying control information for data transmission on anchor carriers and / or other carriers, · Supports communication of UEs that can operate on a single carrier, and -It can be an uplink carrier suitable for operation.
In one example, the downlink anchor carrier and / or the uplink anchor carrier may be unique to the eNB or may be applied to all UEs serviced by the eNB. In another example, the downlink anchor carrier and / or the uplink anchor carrier may be unique to the UE, and different UEs may have different downlink anchor carriers and / or different uplink anchor carriers. Good.
In one example, unrestricted eNBs may transmit synchronization signals (eg, PSS and SSS) on each of the available downlink carriers. The restricted eNBs may transmit synchronization signals on each assigned downlink carrier. Macro eNBs may use lower power when transmitting sync signals on unassigned downlink carriers. UEs can detect eNBs based on the synchronization signals transmitted by these eNBs. UEs can detect sync signals from both the restricted eNBs and the macro eNBs on the downlink carriers assigned to the restricted eNBs because the macro eNBs transmit at lower power levels on these carriers. Can be. UEs can also determine received signal quality, path loss, and / or other metrics based on the sync signal. The eNBs to be serviced can be selected for UEs based on the metric (s).
An eNB may have one or more assigned downlink carriers and one or more unassigned downlink carriers. The eNB can serve one or more UEs with each assigned downlink carrier, and each unassigned downlink carrier can also serve zero or more UEs. For example, eNBs may serve strong UEs (eg, UEs with less path loss) on unassigned downlink carriers, as these UEs may be able to overcome strong interference from other eNBs. The eNB may serve weak UEs (eg, UEs with higher path loss) in the assigned downlink carrier so that these UEs can observe less interference from other eNBs.
The eNB may transmit data and control information on assigned and unassigned downlink carriers in a variety of ways. Control information is scheduling grant Grants), ACK information, etc. may be included. In one example, the eNB may transmit data and control information for each UE on the same downlink carrier. This example can simplify the operation because the data and control information are sent on the same carrier. In another example, the eNB may transmit data and control information about a given UE on different downlink carriers. For example, the eNB may send control information to the UE on an assigned downlink carrier and data on an unassigned downlink carrier. This example can improve performance because the eNB can transmit control information with higher power on the assigned downlink carrier. In one example, the new PDCCH format can be used by multiple downlink carriers to convey scheduling grants for data transmission. Scheduling grants for different downlink carriers can be sent with different payloads and / or with different scrambling of PDCCH. PHICH can carry ACK information for data transmission on multiple uplink carriers.
In one example, frequency reservation can be used to improve performance and can also be referred to as intra-carrier bandwidth partitioning. An eNB may be assigned one downlink carrier and reserve a portion of the downlink carrier assigned to another eNB. For example, an eNB can be assigned a 5MHz carrier with four subbands. An eNB may reserve one or more subbands of a downlink carrier assigned to another eNB. eNB is a common method, downlink carrier assigned by A may transmit PSS, SSS, PBCH and a cell specific reference signal for each cell (cell-specific reference signal). An eNB may also transmit control information and data as part of an assigned downlink carrier that is not reserved for another eNB. The eNB may avoid transmitting or transmit at a lower power level in the reserved portion of the assigned downlink carrier.
Frequency reservations can be used to dynamically reallocate frequency resources between eNBs. Frequency reservations can be used whenever and as needed. For example, the number of subbands reserved for another eNB may depend on the amount of data sent by the other eNB. Subbands can also be reserved as long as required by other eNBs. Frequency reservation can also be used to allocate frequency resources with greater granularity than one carrier.
The eNB may broadcast bar information indicating the status of various downlink carriers. In one example, the bar information of a downlink carrier may indicate whether the carrier is available for use by UEs. For example, the bar information for each assigned downlink carrier may indicate that the carrier is available for use, and the bar information for each unassigned downlink carrier may be for use by the carrier. May also indicate that it is not available. A UE that detects a downlink carrier that is banned by the eNB can either (i) search for another downlink carrier that is not banned by the eNB, or (ii) select another eNB with that downlink carrier. Can be done.
In another example, the downlink carrier bar information may identify UEs that are allowed to access the carrier and / or UEs that are not allowed to access the carrier. For example, the bar information of an unassigned downlink carrier may prevent a first set of UEs from accessing the carrier and allow a second set of UEs to access the carrier. The first set of UEs may not be able to reliably communicate with the eNB at lower transmit power levels with unassigned downlink carriers, so (i) another downlink carrier assigned to the eNB. Or (ii) select another eNB to which this downlink carrier is assigned. The second set of UEs can reliably communicate with the eNB with unassigned downlink carriers, even at lower transmit power levels.
The various examples and features described above for downlink carriers can also be used for uplink carriers. In general, any number of uplink carriers may be available for uplink. The number of uplink carriers can depend on various factors such as system bandwidth, desired or required bandwidth for each uplink carrier, and so on. Available uplink carriers can be assigned to eNBs, for example, as described above for downlink carriers. Higher (eg, maximum) transmit power may be used for each assigned uplink carrier, and lower (or zero) transmit power may be used for each unassigned uplink carrier.
A given eNB may serve one or more UEs on each assigned uplink carrier and further serve zero or more UEs on each unassigned uplink carrier. In one example, the UE may transmit data and control information to the eNB on the same carrier. This example can simplify the operation. In another example, the UE may transmit data to the eNB on an assigned or unassigned uplink carrier and control information on the assigned uplink carrier. This example improves the certainty of the control information, which allows less interference from other UEs communicating with other eNBs to the assigned uplink carriers.
In one example, frequency reservation can be used to reserve a portion of the uplink carrier assigned to an eNB for use by another eNB. Frequency reservation is used when and as needed and can be triggered by signaling that is exchanged through the backhaul, as described above.
FIG. 5 shows an example of communication by eNB. In the example shown in FIG. 5, the three downlink carriers D1, D2 and D3 are available on the downlink and the three uplink carriers U1, U2 and U3 are available on the uplink. The eNB can be assigned uplink carriers U2 and U3 as well as downlink carriers D2 and D3.
In one example, the eNB may have a downlink anchor carrier and an uplink anchor carrier. The downlink anchor carrier can be one of the assigned downlink carriers, for example, the downlink carrier D2. The uplink anchor carrier can be one of the assigned uplink carriers, for example the uplink carrier U2. The downlink anchor carrier may carry downlink control information from the eNB to support data transmission over the downlink and uplink of all carriers. Uplink anchor carriers may carry uplink control information from UEs to support downlink and uplink data transmission for all carriers. For example, the downlink control information may include a downlink grant for downlink data transmission, an uplink grant for uplink data transmission, ACK information for uplink data transmission, and the like. Uplink control information may include resource requests for uplink data transmission, CQI information for downlink data transmission, ACK information for downlink data transmission, and the like. The eNB may transmit data to UEs, for example, for unassigned downlink carriers, subject to lower transmit power limits, not only on the downlink anchor carrier but also on other downlink carriers. UEs may transmit data to the eNB, for example, for unassigned uplink carriers, subject to lower transmit power limits, not only on the uplink anchor carrier but also on other uplink carriers.
In another embodiment, the station may make automatic settings for selecting a carrier suitable for communication from a plurality of carriers. The station may be a UE or a network entity, which may be a base station, a network controller, and the like.
In one example, the station may determine a metric for each carrier available for communication. Metrics can include received signal quality, path loss, signal strength, and / or other parameters. Metrics also include transmission energy metrics, effective geometry metrics, predicted data rate metrics, utility metrics, or some other metric calculated based on at least one parameter. sell.
The station may select a carrier for communication from a plurality of carriers based on the metric for each carrier. In one example, the metric includes received signal quality and the station may select the carrier with the highest received signal quality for communication. In another example, the metric includes path loss and the station may select the carrier with the least path loss for communication. In yet another example, the metric includes the load and the station may select the carrier with the least load for communication. In yet another example, the metric includes quality-of-service (QoS) and / or access quality determined based on data rate, and the station has the highest access quality for communication. You can choose a carrier. The station may also select a carrier for communication in other ways.
Metrics for each carrier can be determined in different ways, for example, based on the information available, depending on whether the station is a UE or a network entity. In one example, the metric for each carrier is determined based on radio measurements, which can be used to determine received signal quality, path loss, etc. In another example, the metric for each carrier can be determined based on the reports sent by UEs to network entities. In yet another example, the metric for each carrier can be determined based on the backhaul information received by the network entity from at least one base station.
Anchor carriers can be used to facilitate communication, as described above. Anchor carriers can also be used to reduce self-desensitization. If the wireless network uses a large number of carriers on the downlink and uplink, there will be a decrease in self-sensitivity on the UE, and the downlink carrier closest to the uplink transmission will be the duplexer transmit and receive ports on the UE. Interference can occur due to the limited isolation between them. To mitigate self-sensitivity degradation, uplink and downlink controls may be sent by carriers that are farthest from each other. Uplink and downlink transmission can be due to different radio technologies.
FIG. 6 shows an example of the communication process 600 by the first base station in the wireless network. The first base station may communicate with the first carrier at the first (eg, maximum) transmit power level (block 612). The first base station communicates with the second carrier at the second transmit power level, which is the first transmit to reduce interference with the second base station communicating with the second carrier. Can be lower than power level (block 614). The first carrier may have less interference from the second base station than the second carrier.
The first and second base stations can belong to different power classes or support different types of association / access. In one example, a first base station may belong to a higher power class, while a second base station may belong to a lower power class. Or vice versa. In another example, a first base station may support unrestricted access, while a second base station may support restricted access. Or vice versa.
In one example, the first and second carriers can be for downlink. At block 612, the first base station may send the first data transmission to the first UE at the first transmit power level and at the first carrier. At block 614, the first base station may send a second data transmission to the second UE at the second transmit power level and at the second carrier. In one example, the first base station is the first carrier and sends control information to the first and second UEs, which can be downlink anchor carriers. In another example, the first base station may send control information to the first UE on the first carrier and control information to the second UE on the second carrier. The first base station may also send at least one sync signal on each of the first and second carriers to allow UEs to detect the first base station.
In another example, the first and second carriers can be for uplinks. At block 612, the first base station may receive the first data transmission sent by the first UE at the first carrier at the first transmit power level. At block 614, the first base station may receive the second data transmission sent by the second UE at the second carrier at the second transmit power level. In one example, the first base station is the first carrier and receives control information from the first and second UEs, which can be the uplink anchor carrier. In another example, the first base station may receive control information from the first UE on the first carrier and control information from the second UE on the second carrier.
In one example, the first and second carriers can be assigned to the first and second base stations based on a static or semi-static schedule. In another example, the first base station may exchange signaling with a second base station or network entity to determine the use of the first and / or second carrier by each base station. For example, the first base station may decide whether to reduce the transmit power on the second carrier based on the capacity benefit for the second base station or wireless network.
In one example, the first base station may reserve a portion of the first carrier for use by the second base station. The first base station may use the remaining portion of the first carrier for communication. In another example, the first base station may determine a portion of the second carrier reserved by the second base station for the first base station. The first base station can then communicate at the first transmit power level with a reserved portion of the second carrier.
In one example, the first base station can access the base station through the first carrier and identify at least one UE that observes less interference with the second carrier. The first base station can direct the identified UEs (s) to the second carrier in order to distribute the load across the carriers.
In one example, the first base station has (i) bar information indicating that the first carrier is prohibited, and (ii) a bar indicating that the second carrier is prohibited. Information can be broadcast. In another example, the first base station indicates that the second carrier is prohibited from being used by the first set of UEs and is not prohibited from being used by the second set of UEs. Can be broadcast. The first base station may also broadcast other bar information about the first and / or second carriers.
In one example, the first base station is (i) at the third transmit power level, at the third carrier, and (ii) at the third transmit power to reduce interference to the fourth carrier. It is possible to communicate with the fourth carrier at the fourth transmit power level, which is lower than the level. The first and second carriers are used for communication on one link (eg, downlink), and the third and fourth carriers are for communication on other links (eg, uplink). Can be used.
FIG. 7 shows an example of the device 700 for communicating in a wireless network. The apparatus 700 has a module 712 for communicating with the first carrier at the first transmission power level by the first base station and a second transmission power level at the second transmission power level by the first base station. The second transmit power level is lower than the first transmit power level, including module 714 for carrier communication.
FIG. 8 shows an example of Process 800 for communication by a second base station in a wireless network. The second base station may determine which of the multiple carriers available for communication has less interference from the first base station (block 812). The second base station may determine interference with each of the plurality of carriers based on radio measurements from UEs, signaling from the first base station, and the like. The second base station can communicate with its carrier (block 814). The first and second base stations can belong to different power classes or support different types of associations.
FIG. 9 shows an example of the device 900 for communicating in a wireless network. The device 900 has a module 912 for determining a carrier that has less interference from the first base station among a plurality of carriers available for communication, and a module 912 for communicating with the carrier by the second base station. The first and second base stations, including module 914, belong to different power classes or support different types of associations.
FIG. 10 shows an example of Process 1000 for communication by UE in a wireless network. The UE may detect a first base station operating at the first transmit power level on the first carrier and at the second transmit power level on the second carrier (block 1012). The second transmit power level can be lower than the first transmit power level in order to reduce interference with the second base station operating on the second carrier. The first and second base stations can belong to different power classes or support different types of associations. The UE may communicate with the first base station at the first transmit power level on the first carrier and / or at the second transmit power level on the second carrier (block 1014).
In one example of block 1012, the UE may receive signals (eg, synchronization signals) from a plurality of base stations, including a first base station, on the first and / or second carrier. The UE may select a first base station for communication from a plurality of base stations based on the received signal. For example, the UE may select a first base station based on received signal quality, path loss, etc.
The UE may choose a first or second carrier for communication with the first base station. In one example, the UE may determine the received signal quality of each of the first and second carriers. The UE may choose a first or second carrier with higher received signal quality for communication. In another example, the UE may select the first carrier if the interference with the second carrier exceeds the threshold. The UE may choose a second carrier if the interference with this carrier is below the threshold. The UE may also choose a first or second carrier by other means.
The UE may communicate with the first base station on the carrier of choice. In one example, the UE may exchange data and control information (eg, receive or send) with a first base station on selected carriers. In another example, the UE exchanges control information from the first base station on the first carrier and data on the selected carrier.
FIG. 11 shows an example of the device 1100 for communication in a wireless network. Device 1100 is for detecting a first base station operating at a first transmit power level on the first carrier and at a second transmit power level lower than the first transmit power level on the second carrier. Includes module 1112 and module 1114 for communicating with the first base station at the first transmit power level on the first carrier and / or at the second transmit power level on the second carrier.
FIG. 12 shows an example of process 1200 for communication on at least one carrier, where control information is sent on a designated carrier that is different from that at least one carrier. Process 1200 is performed by a station, which can be a base station, UE, or some other entity. The station may communicate with at least one carrier (block 1212). The station may exchange control information with the first carrier for communication with its at least one carrier (block 1214). The first carrier can be different from at least one of them. The control information may include scheduling grants, CQI information, ACK information, and / or other information for data transmission on at least one carrier.
The station may be a base station. In one example, at least one carrier and the first carrier can be for downlink. The base station may send at least one data transmission to at least one UE on at least one carrier and control information (eg, scheduling grant, etc.) to at least one UE on the first carrier. In another example, at least one carrier and the first carrier may be for uplink. The base station receives at least one data transmission from at least one UE on at least one carrier and control information (eg, resource request, ACK information, etc.) from at least one UE on the first carrier. Can be received.
The station may be UE. In one example, at least one carrier and the first carrier can be for downlink. The UE may receive data transmissions from the base station on at least one carrier and control information (eg, scheduling grants, etc.) from the base station on the first carrier. In another example, at least one carrier and the first carrier may be for uplink. The UE may send data transmissions to the base station on at least one of the carriers and control information (eg, resource requests, ACK information, etc.) to the base station on the first carrier.
FIG. 13 shows an example of the device 1300 for communication in a wireless network. The device 1300 includes a module 1312 for communicating with at least one carrier and a module 1314 for exchanging control information with the first carrier for communication with at least one carrier. Is different from at least one carrier.
FIG. 14 shows an example of process 1400 for communication on a carrier with automatic configuration. Process 1400 is performed by the station, which can be a UE or network entity. The network entity can be a base station, a network controller, or some other entity. The station may determine metrics for each of the multiple carriers available for communication (block 1412). The metric may include at least one parameter other than signal strength, such as received signal quality, path loss, and the like. The station may select a carrier for communication from a plurality of carriers, for example, based on the metric for each carrier, as described above (block 1414). The station may communicate on the carrier of choice (block 1416). In one example, both data and control information can be exchanged (eg, sent or received) via selected carriers. In another example, control information can be exchanged via selected carriers and data can be exchanged via selected carriers and / or anchor carriers. The selected carrier may be designated as the anchor carrier for the station and may have the attributes described above for the anchor carrier.
FIG. 15 shows an example of the device 1500 for communication in a wireless network. The device 1500 includes a module 1512 for determining a metric for each of the plurality of carriers available for communication, the metric containing at least one parameter other than signal strength, and based on the metric for each carrier. It includes a module 1514 for selecting a carrier for communication from a plurality of carriers and a module 1516 for communicating with the selected carrier.
FIG. 16 shows an example of process 1600 for broadcasting bar information by a base station in a wireless network. The base station may determine bar information for at least one carrier (block 1612). Bar information for each carrier may indicate whether the carrier is banned from use. The base station broadcasts the bar information to the UEs, which may use the bar information to determine access to the base station (block 1614).
In one example, at least one carrier may include first and second carriers. The bar information for the first carrier may indicate that the first carrier is banned, and the bar information for the second carrier may indicate that the second carrier is not banned. For example, a base station may be able to use the maximum transmit power on the second carrier and the lower transmit power level on the first carrier. The bar information can be used to entice UEs to access the base station through a second carrier. And, where appropriate, the base station may re-direct one or more UEs to the first carrier.
In another example, bar information about a given carrier may indicate that the carrier is not prohibited in the first set of UEs and is prohibited in the second set of UEs. For example, a base station may have lower transmission power levels available on its carrier. The first set of UEs can be UEs that can achieve sufficient performance at lower transmission power levels. The second set of UEs can be UEs that require higher transmission power levels to achieve sufficient performance. As another example, the first set of UEs can operate on multiple carriers. These UEs may receive data at a lower transmission power level at their carrier and control information at a higher transmission power level at another carrier. The bar information for each carrier may also include other information that can be used to control communications and access on that carrier.
FIG. 17 shows an example of the device 1700 for communication in a wireless network. The device 1700 includes a module 1712 for determining bar information for at least one carrier, the bar information for each carrier indicates whether that carrier is prohibited, and broadcasts the bar information to UEs. Includes module 1714 for
Modules in Figures 7, 9, 11, 13, 15 and 17 are processors, electronics devices, hardware devices, electronics components, logic circuits, memory, software code, firmware code, etc., or any of them. Can include combinations of.
For the sake of clarity, most of Figures 6-17 are described by two carriers. In general, this technique can be applied to any number of carriers in a similar manner.
FIG. 18 shows a block diagram of an example of base stations / eNB 110 and UE 120, which can be one of the base stations / eNBs of FIG. 1 and one of the UEs. Base station 110 is equipped with T antennas from 1834a to 1834t, UE120 is equipped with R antennas from 1852a to 1852r, and generally T 1 and R 1.
At base station 110, the transmit processor 1820 may receive data from the data source 1812 and control information from the controller / processor 1840. Processor 1820 can process data and control information (eg, encoding and symbol mapping) to obtain data symbols and control symbols, respectively. In addition, processor 1820 may generate reference symbols for, for example, synchronization and reference signals. Transmit (TX) multi-input multi-output (MIMO) processor 1830 performs spatial processing (eg, precoding) on data symbols, control symbols, and / or reference symbols, if applicable, from 1832a. It can supply T output symbol streams to T modulators (MODs) up to 1832t. Each modulator 1832 can process each output symbol stream (for example, for OFDM) to obtain an output sample stream. Each modulator 1832 can further process the output sample stream (eg, analog convert, amplify, filter, and upconvert) to obtain a downlink signal. The T downlink signals of the modulators from 1832a to 1832t can be transmitted via the T antennas from 1834a to 1834t, respectively.
In UE120, the antennas from 1852a to 1852r can receive the downlink signal from the base station 110 and supply the received signals to the demodulators (DEMODs) from 1854a to 1854r, respectively. Each demodulator 1854 can tune (eg, filter, amplify, downconvert, and digitize) its received signal to obtain an input sample. Each demodulator 1854 can further process the input sample (for example, for OFDM) to obtain the received symbol. MIMO detector 1856 may obtain symbols received from all R demodulators from 1854a to 1854r, and if applicable, perform MIMO detection on the received symbols and supply the detected symbols. .. The receiving processor 1858 processes the detected symbols (eg, demodulates, deinterleaves, and decodes), feeds the data sink 1860 with the decoded data for the UE 120, and decodes it to the controller / processor 1880. It can supply control information.
On the uplink, in UE120, transmit processor 1864 can receive and process data from data source 1862 and control information from controller / processor 1880. Processor 1864 may also generate a reference symbol for the reference signal. Symbols from transmit processor 1864 are precoded by TX MIMO processor 1866, if applicable, and further processed by modulators from 1854a to 1854r (for example, for SC-FDM) and transmitted to base station 110. Can be done. At base station 110, the uplink signal from UE120 is received by antenna 1834, processed by demodulator 1832, detected by MIMO detector 1836 if applicable, and further processed by receiving processor 1838 by UE120. The transmitted decrypted data and control information can be obtained. Processor 1838 may supply the decoded data to the data sink 1839 and the decoded control information to the controller / processor 1840.
Controllers / processors 1840 and 1880 may direct operation on base stations 110 and UE 120, respectively. Processor 1840 and / or other processors and modules of base station 110 include process 600 in FIG. 6, process 800 in FIG. 8, process 1200 in FIG. 12, process 1400 in FIG. 16, process 1600 in FIG. 16, and /. Alternatively, other processes for the techniques described herein may be performed or directed. Processor 1880, and / or other processors and modules of UE120, are Process 1000 in Figure 10, Process 1200 in Figure 12, Process 1400 in Figure 14, and / or other processes for the techniques described herein. Can be executed or instructed. Memories 1842 and 1882 may store data and program code for base stations 110 and UE 120, respectively. Scheduler 1844 may schedule UEs for downlink and / or uplink data transmission.
Those skilled in the art will appreciate that information and signals can be represented using any variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned in the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof. Can be represented by.
One of ordinary skill in the art will further perform the various exemplary logical blocks, modules, circuits, and algorithmic steps described in connection with the disclosure herein as electronic hardware, computer software, or a combination thereof. You will understand that. To illustrate this interoperability of hardware and software, various exemplary components, blocks, modules, circuits and steps have been described earlier, generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and design constraints imposed on the entire system. One of ordinary skill in the art may implement the functionality described in a variety of ways for each particular application, but solutions by such implementation will be construed as deviating from the scope of this disclosure. Should not be.
The various exemplary logic blocks, modules and circuits described in connection with the disclosure herein are general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), and field programmable gate arrays (FPGAs). ), Or other programmable logic devices, discrete gates, or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. sell. The general purpose processor can be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. Processors can also be implemented as a combination of computer devices, such as a DSP and microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration. ..
The steps or algorithms of the methods described herein in connection with the present disclosure may be embodied in software modules executed by a processor directly in hardware or in combination of the two. Software modules reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. sell. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and write the information to the storage medium. Alternatively, the storage medium can be embedded in the processor. Processors and storage media can reside in the ASIC. The ASIC can be in the user terminal. Alternatively, the processor and storage medium can exist as discrete components within the user terminal.
In one or more exemplary examples, the functions described may be performed in hardware, software, firmware, or any combination thereof. When implemented in software, a function may be stored on or transmitted on a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of computer programs from one location to another. The storage medium may be any available medium accessible by a general purpose or dedicated computer. By way of example, but not by limitation, such computer-readable media are in the form of RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or instructions or data structures. , Can be used to transport or store the desired program code means, and may include a general purpose or dedicated computer, or any other medium accessible by a general purpose or dedicated processor. Moreover, both connections are, of course, referred to as computer-readable media. For example, the software may be a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology such as infrared, wireless, and microwave. When transmitted, wireless technologies such as coaxial cable, fiber optic cable, twisted pair, DSL, or infrared, wireless, and microwave are included in the definition of medium. Discs and discs, as used herein, are compact discs (CDs), laser® discs, optical discs, and digital versatile discs. ) (DVD), floppy (registered trademark) disc (disk), and Blu-ray (registered trademark) disc (disc), including disc (disk) ) Usually reproduces data magnetically, while discs reproduce data optically with a laser. The above combinations should also be included within the scope of computer readable media.
The prior description of this disclosure is provided to allow any person skilled in the art to manufacture or use this disclosure. Various changes to this disclosure will be readily understood by those skilled in the art, and the general principles defined herein apply to other variations without departing from the spirit or scope of this disclosure. Can be done. As such, this disclosure is not limited to the examples and designs described herein, and is intended to be given the broadest scope consistent with the principles and novel features disclosed herein. Will be done.<u style="single">The inventions described in the claims of the original application of the present application are described below.</u><u style="single">[1] Communicating with the first carrier at the first transmit power level by the first base station,</u><u style="single">The first base station communicates with the second carrier at the second transmission power level, and the second transmission power level is the second base station communicating with the second carrier. The first and second base stations belong to different power classes or support different association types, which is lower than the first transmit power level to reduce interference with.</u><u style="single">Communication methods in wireless communication networks, including.</u><u style="single">[2] The first carrier is assigned to the first base station of the first power class, and the second carrier is the second base of the second power class different from the first power class. The method described in [1] assigned to the station.</u><u style="single">[3] The first carrier is assigned to the first base station with unrestricted access, and the second carrier is assigned to the second base station with restricted access, [3] The method described in 1].</u><u style="single">[4] The first and second carriers are for downlink, and communicating with the first carrier is to the first user equipment (UE) at the first transmission power level, said first. Communicating with the second carrier, including sending the first data transmission with one carrier, to the second UE at the second transmission power level, at the second carrier, the second. The method described in [1], which involves sending a data transmission of 2.</u><u style="single">[5] The method according to [4], wherein communicating with the first carrier further comprises sending control information to the first and second UEs with the first carrier.</u><u style="single">[6] The first and second carriers are for uplinks, and communicating with the first carrier is the first transmission power level, the first carrier, and the first user device. Communicating with the second carrier, including receiving a first data transmission sent by (UE), is at the second transmit power level, at the second carrier, by the second UE. The method according to [1], which comprises receiving a second data transmission to be sent.</u><u style="single">[7] Communicating with the first carrier further includes receiving control information from the first UE with the first carrier, and communicating with the second carrier is described above. The method according to [6], further comprising receiving control information from the second UE in the second carrier.</u><u style="single">[8] To exchange signaling with the second base station to determine the use of the second carrier for communication by the second base station.</u><u style="single">The method according to [1], further comprising.</u><u style="single">[9] Reserving a portion of the first carrier for use by the second base station and</u><u style="single">Using the remaining portion of the first carrier for communication by the first base station</u><u style="single">The method according to [1], further including.</u><u style="single">[10] Determining a portion of the second carrier reserved by the second base station for the first base station.</u><u style="single">Communicating with said reserved portion of said second carrier at said first transmit power level by said first base station.</u><u style="single">The method according to [1], further including.</u><u style="single">[11] The first base station sends at least one synchronization signal on each of the first and second carriers.</u><u style="single">The method according to [1], further comprising.</u><u style="single">[12] Communicating with a third carrier at a third transmit power level by the first base station and</u><u style="single">The first base station communicates with a fourth carrier at a fourth transmit power level, the fourth transmit power level to reduce interference at the fourth carrier. The first and second carriers are used for downlink communication, and the third and fourth carriers are for uplink communication. Used for</u><u style="single">The method according to [1], further including.</u><u style="single">[13] Determining whether to reduce the transmit power on the second carrier based on the capacity advantage for the second base station or radio network.</u><u style="single">The method according to [1], further comprising.</u><u style="single">[14] Broadcasting information indicating that the first carrier is not prohibited from use.</u><u style="single">Broadcast information indicating that the second carrier is prohibited from use.</u><u style="single">The method according to [1], further including.</u><u style="single">[15] Identifying at least one user device (UE) that accesses the first base station through the first carrier.</u><u style="single">Allocate the at least one UE from the first carrier to the second carrier.</u><u style="single">The method according to [1], further including.</u><u style="single">[16] A means for communicating with the first carrier at the first transmission power level by the first base station,</u><u style="single">The first base station is a means for communicating with the second carrier at the second transmission power level, and the second transmission power level is the second transmission power level with which the second carrier communicates. Means that are lower than the first transmit power level and the first and second base stations belong to different power classes or support different types of associations in order to reduce interference to the base station.</u><u style="single">Devices for wireless communication, including.</u><u style="single">[17] The first and second carriers are for downlink, and the means for communicating with the first carrier is to the first user equipment (UE) at the first transmit power level. , The means for transmitting the first data transmission in the first carrier, and the means for communicating in the second carrier to the second UE at the second transmission power level, said. The device according to [16], which comprises a means for sending a second data transmission in a second carrier.</u><u style="single">[18] Means for reserving a portion of the first carrier for use by the second base station, and</u><u style="single">Means for using the remaining portion of the first carrier for communication by the first base station</u><u style="single">The device according to [16], further including.</u><u style="single">[19] The first base station communicates with the first carrier at the first transmit power level, and the first base station communicates with the second carrier at the second transmit power level. The second transmit power level is lower than the first transmit power level in order to reduce interference with the second base station communicating with the second carrier. The first and second base stations are at least one processor that belongs to a different power class or supports different types of associations.</u><u style="single">Equipment for wireless communication, including.</u><u style="single">[20] The first and second carriers are for downlink, and the at least one processor is to the first user equipment (UE) at the first transmit power level, said first carrier. The first data transmission is sent to the second UE, and the second data transmission is sent to the second UE at the second transmission power level and at the second carrier, [19. ] The device described in.</u><u style="single">[21] The at least one processor reserves a portion of the first carrier for use by the second base station and for communication by the first base station. The device according to [19], which is configured to use the remaining portion of one carrier.</u><u style="single">[22] With a code that allows at least one computer to communicate with the first carrier at the first transmit power level by the first base station,</u><u style="single">A code for causing the at least one computer to communicate with the second carrier at the second transmit power level by the first base station, wherein the second transmit power level is: The first and second base stations belong to different power classes or are lower than the first transmit power level in order to reduce interference to the second base station communicating with the second carrier. Code that supports different types of associations</u><u style="single">Computer-readable media, including and</u><u style="single">Including computer program products.</u><u style="single">[23] Determining the carrier with less interference from the first base station among the multiple carriers available for communication.</u><u style="single">Communicating with the carrier by a second base station, wherein the first and second base stations belong to different power classes or support different types of associations.</u><u style="single">How to communicate over a wireless communication network, including.</u><u style="single">[24] The method according to [23], wherein the first base station belongs to a higher power class and the second base station belongs to a lower power class.</u><u style="single">[25] The method of [23], wherein the first base station supports unrestricted access and the second base station supports restricted access.</u><u style="single">[26] Determining interference at each of the plurality of carriers based on radio measurements.</u><u style="single">The method according to [23], further comprising.</u><u style="single">[27] Determining interference at each of the plurality of carriers based on signaling from the first base station.</u><u style="single">The method according to [23], further comprising.</u><u style="single">[28] A means for determining which of the multiple carriers available for communication has less interference from the first base station,</u><u style="single">Means for communicating with the carrier by a second base station, wherein the first and second base stations belong to different power classes or support different types of associations.</u><u style="single">Devices for wireless communication, including.</u><u style="single">[29] To detect a first base station operating at a first transmit power level, at a first carrier, and at a second transmit power level, at a second carrier, said first. The transmission power level of 2 is lower than that of the first transmission power level in order to reduce interference with the second base station operating on the second carrier, and the first and second base stations are , Belonging to different power classes or supporting different types of associations,</u><u style="single">Communicating with the first base station at the first transmit power level, at the first carrier, at the second transmit power level, at the second carrier, or both.</u><u style="single">How to communicate over a wireless communication network, including.</u><u style="single">[30] Communicating with the first base station</u><u style="single">Determining the received signal quality of each of the first and second carriers</u><u style="single">Selecting the first or second carrier with higher received signal quality and</u><u style="single">Communicating with the first base station on the selected carrier</u><u style="single">The method described in [29], including.</u><u style="single">[31] Communicating with the first base station</u><u style="single">When the interference in the second carrier exceeds the threshold value, selecting the first carrier and</u><u style="single">When the interference in the second carrier is below the threshold value, selecting the second carrier and</u><u style="single">Communicating with the first base station on the selected carrier</u><u style="single">The method described in [29], including.</u><u style="single">[32] Communicating with the first base station</u><u style="single">To select the first or second carrier for communication,</u><u style="single">Exchanging control information between the first base station and the selected carrier,</u><u style="single"> Exchanging data between the first base station and the selected carrier.</u><u style="single">The method described in [29], including.</u><u style="single">[33] Communicating with the first base station</u><u style="single">Exchanging control information between the first base station and the first carrier</u><u style="single">Exchanging data between the first base station and the second carrier</u><u style="single">The method described in [29], including.</u><u style="single">[34] Detecting the first base station</u><u style="single">Receiving a signal from a plurality of base stations including the first base station with the first or second carrier, and</u><u style="single">To select the first base station for communication from the plurality of base stations based on the received signal.</u><u style="single">The method described in [29], including.</u><u style="single">[35] A means for detecting a first base station operating at a first carrier at a first transmit power level and at a second carrier at a second transmit power level. The second transmit power level is lower than the first transmit power level in order to reduce interference with the second base station operating on the second carrier, and the first and second bases. Stations belong to different power classes or support different types of associations, means and</u><u style="single">To communicate with the first base station at the first carrier, at the first transmit power level, or at the second carrier, at the second transmit power level, or both. means</u><u style="single">Devices for wireless communication, including.</u><u style="single">[36] The means for communicating with the first base station is</u><u style="single">Means for selecting the first or second carrier for communication, and</u><u style="single">A means for exchanging control information between the first base station and the selected carrier,</u><u style="single">Means for exchanging data between the first base station and the selected carrier</u><u style="single">The device according to [35], including.</u><u style="single">[37] The means for communicating with the first base station is</u><u style="single">A means for exchanging control information between the first base station and the first carrier,</u><u style="single">Means for exchanging data between the first base station and the second carrier</u><u style="single">The device according to [35], including.</u><u style="single">[38] Communicating with at least one carrier and</u><u style="single">The exchange of control information with the first carrier for communication with the at least one carrier, wherein the first carrier is different from the at least one carrier.</u><u style="single">How to communicate over a wireless communication network, including.</u><u style="single">[39] The control information includes scheduling grants, channel quality indicator (CQI) information, acknowledgment (ACK) information, or a combination thereof for data transmission on the at least one carrier. [38] The method described in.</u><u style="single">[40] The at least one carrier and the first carrier are for downlink, and communication with the at least one carrier is performed by the at least one carrier to at least one user device (UE). Exchanging control information with said first carrier, including sending at least one data transmission, is said to be said in said first carrier for said said at least one carrier. The method according to [38], which comprises sending control information to at least one UE.</u><u style="single">[41] The at least one carrier and the first carrier are for uplink, and communication with the at least one carrier is performed by the at least one carrier from at least one user device (UE). Exchanging control information on the first carrier, including receiving at least one data transmission, is performed on the first carrier for the at least one data transmission on the at least one carrier. 38. The method of [38], comprising receiving control information from at least one UE.</u><u style="single">[42] The at least one carrier and the first carrier are for downlink, and communicating with the at least one carrier means receiving data transmission from the base station with the at least one carrier. Including, exchanging control information with the first carrier means receiving control information from the base station with the first carrier for the data transmission with the at least one subcarrier. The method described in [38], including.</u><u style="single">[43] The at least one carrier and the first carrier are for uplink, and communicating with the at least one carrier means sending data transmission to the base station with the at least one carrier. Including, exchanging control information on the first carrier includes sending control information to the base station on the first carrier for the data transmission on the at least one subcarrier. The method described in [38].</u><u style="single">[44] Means for communicating with at least one carrier,</u><u style="single">A means for exchanging control information in a first carrier for communication with the at least one carrier, wherein the first carrier is different from the at least one carrier.</u><u style="single">Devices for wireless communication, including.</u><u style="single">[45] The at least one carrier and the first carrier are for downlink, and the means for communicating with the at least one carrier is the at least one carrier and at least one user device (UE). The means for exchanging control information with the first carrier includes means for sending at least one data transmission, the first means for exchanging control information with the first carrier for the at least one data transmission with the at least one carrier. The device according to [44], comprising means for sending control information to the at least one UE in one carrier.</u><u style="single">[46] The at least one carrier and the first carrier are for uplinks, and the means for communicating with the at least one carrier is the at least one carrier and at least one user device (UE). The means for exchanging control information with the first carrier includes means for receiving at least one data transmission from, said, for the at least one data transmission with said at least one carrier. The device according to [44], comprising means for receiving control information from the at least one UE in a first carrier.</u><u style="single">[47] Determining a metric for each of the plurality of carriers available for communication, said metric including at least one parameter other than signal strength.</u><u style="single">To select a carrier for communication from the plurality of carriers based on the metric for each carrier.</u><u style="single">Communicating with the selected carrier</u><u style="single">How to communicate over a wireless communication network, including.</u><u style="single">[48] The method according to [47], wherein the metric includes received signal quality, and selecting a carrier for said communication comprises selecting a carrier with the highest received signal quality for communication. ..</u><u style="single">[49] The method of [47], wherein the metric includes path loss, and selecting a carrier for said communication comprises selecting the carrier with the least path loss for communication.</u><u style="single">[50] The method of [47], wherein the metric includes a load and selecting the carrier for said communication comprises selecting the carrier with the least load for communication.</u><u style="single">[51] The metric includes access quality, determined based on quality of service (QoS) and / or data rate, and selecting the carrier for the communication is the highest access for communication. The method described in [47], which involves selecting a carrier with quality.</u><u style="single">[52] Communicating with the selected carrier</u><u style="single">Designating the selected carrier as the anchor carrier for the base station and</u><u style="single">To exchange control information by the base station via the selected carrier.</u><u style="single">The method described in [47], including.</u><u style="single">[53] The method of [47], wherein determining the metric, selecting the carrier for the communication, and communicating with the selected carrier is performed by the user equipment (UE).</u><u style="single">[54] The method of [47], wherein determining the metric, selecting a carrier for the communication, and communicating with the selected carrier is performed by a network entity.</u><u style="single">[55] Determining a metric for each of the plurality of carriers includes determining the metric for each carrier based on backhaul information received by the network entity from at least one base station. , [54].</u><u style="single">[56] Determining the metric for each of the plurality of carriers comprises determining the metric for each carrier based on reports sent by user equipment (UEs), [47]. the method of.</u><u style="single">[57] The method of [47], wherein determining the metric for each of the plurality of carriers comprises determining the metric for each carrier based on radio measurements.</u><u style="single">[58] A means for determining a metric for each of a plurality of carriers available for communication, said metric comprising at least one parameter other than signal strength.</u><u style="single">A means for selecting a carrier for communication from the plurality of carriers based on the metric for each carrier, and</u><u style="single">Means for communicating with the selected carrier</u><u style="single">Devices for wireless communication, including.</u><u style="single">[59] The means for communicating with the selected carrier is:</u><u style="single">Means for designating the selected carrier as an anchor carrier for the base station, and</u><u style="single">Means for exchanging control information by the base station via the selected carrier.</u><u style="single">The device according to [58], including.</u><u style="single">[60] Determining bar information for at least one carrier, which bar information for each carrier indicates whether the carrier is prohibited from use.</u><u style="single">Broadcasting the bar information to user devices (UEs)</u><u style="single">Methods for wireless communication, including and.</u><u style="single">[61] The at least one carrier includes a first and a second carrier, and bar information about the first carrier indicates that the first carrier is not prohibited, said second carrier. The bar information for is the method according to [60], indicating that the second carrier is banned.</u><u style="single">[62] The at least one carrier includes a first carrier, and the bar information about the first carrier is such that the first carrier is not prohibited in the set of first UEs and the second. The method described in [60], which indicates that it is prohibited in the set of UEs of.</u><u style="single">[63] A means for determining bar information for at least one carrier, wherein the bar information for each carrier indicates whether the carrier is prohibited from use.</u><u style="single">Means for broadcasting the bar information to user devices (UEs)</u><u style="single">Devices for wireless communication, including.</u><u style="single">[64] The at least one carrier includes a first and a second carrier, and bar information about the first carrier indicates that the first carrier is not prohibited, said second carrier. The device according to [63], wherein the bar information for indicates that the second carrier is prohibited.</u><u style="single">[65] The at least one carrier includes a first carrier, and the bar information about the first carrier is such that the first carrier is not prohibited in the set of first UEs and the second. The device according to [63], which indicates that it is prohibited in the set of UEs of.</u>
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Every citation, both waysCites: the store holds 2 of 3
| Document | Relation | Office |
|---|---|---|
| JP2006287601A | Cites | Japan |
| JP2007529915A | Cites | Japan |
| Samsung,Flexible Fractional Frequency Reuse Approach,3GPP TSG RAN WG1 Meeting #43 R1-051341,2005年11月11日 | Non-patent | – |
109 members in 18 offices
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Numbers
- Publication
- 5437367
- Publication, DOCDB
- 5437367
- Publication, EPODOC
- JP5437367B
- Application
- 2011516685
- Application, DOCDB
- 2011516685
- Application, EPODOC
- JP20110516685
Titles2
- Japanese
- より低い第2のパワーレベルで送信することによる干渉の軽減
- English
- Reduced interference by transmitting at a lower second power level
Classification
- CPC, 16
- H04L5/0007
- H04L5/0053
- H04W72/541
- H04L5/003
- H04L5/0073
- H04L27/2601
- H04W52/244
- Y02D30/70
- H04L1/0026
- H04W72/0453
- H04L5/006
- H04W72/542
- H04W72/543
- H04L5/0064
- H04W24/08
- H04W24/02
- IPC, 3
- H04W52 24
- H04W16 10
- H04W72 54
