Buffer status report control for creating transmission gaps
24 claims: 4 independent, 20 dependent
- 1無線通信のための方法であって、 第1のラジオ・アクセス技術における送信ギャップに帰着する、通常動作におけるアップリンク許可より少数のアップリンク許可が受信されるように、修正された送信バッファ・ステータス値を生成するために送信バッファ・ステータス・レポート値を低減することと、 前記送信ギャップの間に、第2のラジオ・アクセス技術を用いて通信することと、 を備える方法。
- 2送信バッファ・ステータスは、バッファ・ステータス・レポート(BSR)である、請求項1に記載の方法。
- 3前記修正された送信バッファ・ステータス値を生成することは、前記第2のラジオ・アクセス技術のトラフィック・タイプに基づく、請求項1に記載の方法。
- 4前記修正された送信バッファ・ステータス値を生成することは、前記送信バッファ・ステータス・レポート値をゼロに設定することを備える、請求項1に記載の方法。
- 5前記修正された送信バッファ・ステータス値を、前記第2のラジオ・アクセス技術の誤り率に基づいて調節すること、をさらに備える請求項1に記載の方法。
- 6前記修正された送信バッファ・ステータス値を、前記第1のラジオ・アクセス技術の現在のデータ・レートに基づいて調節すること、をさらに備える請求項1に記載の方法。
- 7前記第1のラジオ・アクセス技術のダウンリンク・アクティビティおよびアップリンク・アクティビティを再びアクティブにするために、スケジューリング要求が送信される、請求項1に記載の方法。
- 8オフ期間中、スケジューリング要求が保留される、請求項1に記載の方法。
- 9前記第2のラジオ・アクセス技術上での送信のために必要な期間を計算することと、 送信バッファ・ステータスを送信する場合に、ペンディングのすべての再送信を考慮することと、 をさらに備える請求項1に記載の方法。
- 10前記第1のラジオ・アクセス技術は、ロング・ターム・イボリューションを備え、 前記第2のラジオ・アクセス技術は、ブルートゥースとWLANとのうちの1つを備える、請求項1に記載の方法。
- 11アップリンクとダウンリンクとに同時のギャップを生成するために、ゼロに等しいチャネル品質インデクス・レポート値を設定すること、をさらに備える請求項1に記載の方法。
- 12無線通信のための装置であって、 メモリと、 前記メモリに接続された少なくとも1つのプロセッサとを備え、 前記少なくとも1つのプロセッサは、 第1のラジオ・アクセス技術における送信ギャップに帰着する、通常動作におけるアップリンク許可より少数のアップリンク許可が受信されるように、修正された送信バッファ・ステータス値を生成するために送信バッファ・ステータス・レポート値を低減し、 前記送信ギャップの間に、第2のラジオ・アクセス技術を用いて通信する ように構成された、装置。
- 13送信バッファ・ステータスは、バッファ・ステータス・レポート(BSR)である、請求項12に記載の装置。
- 14前記プロセッサは、前記修正された送信バッファ・ステータス値を、前記第2のラジオ・アクセス技術のトラフィック・タイプに基づいて生成するように構成された、請求項12に記載の装置。
- 15前記プロセッサは、前記修正された送信バッファ・ステータス値を、前記送信バッファ・ステータス・レポート値をゼロに設定することによって生成するように構成された、請求項12に記載の装置。
- 16前記プロセッサはさらに、前記修正された送信バッファ・ステータス値を、前記第2のラジオ・アクセス技術の誤り率に基づいて調節するように構成された、請求項12に記載の装置。
- 17前記プロセッサはさらに、前記修正された送信バッファ・ステータス値を、前記第1のラジオ・アクセス技術の現在のデータ・レートに基づいて調節するように構成された、請求項12に記載の装置。
- 18前記第1のラジオ・アクセス技術のダウンリンク・アクティビティおよびアップリンク・アクティビティを再びアクティブにするために、スケジューリング要求が送信される、請求項12に記載の装置。
- 19オフ期間中、スケジューリング要求が保留される、請求項12に記載の装置。
- 20前記プロセッサはさらに、 前記第2のラジオ・アクセス技術上での送信のために必要な期間を計算し、 送信バッファ・ステータスを送信する場合に、ペンディングのすべての再送信を考慮するように構成された、請求項12に記載の装置。
- 21前記第1のラジオ・アクセス技術は、ロング・ターム・イボリューションを備え、 前記第2のラジオ・アクセス技術は、ブルートゥースとWLANとのうちの1つを備える、請求項12に記載の装置。
- 22前記プロセッサはさらに、アップリンクとダウンリンクとに同時のギャップを生成するために、ゼロに等しいチャネル品質インデクス・レポート値を設定するように構成された、請求項12に記載の装置。
- 23無線ネットワークにおける無線通信のためのコンピュータ・プログラムであって、 コンピュータによって実行されるプログラム・コードを備え、前記プログラム・コードは、 第1のラジオ・アクセス技術における送信ギャップに帰着する、通常動作におけるアップリンク許可より少数のアップリンク許可が受信されるように、修正された送信バッファ・ステータス値を生成するために送信バッファ・ステータス・レポート値を低減するためのプログラム・コードと、 前記送信ギャップの間に、第2のラジオ・アクセス技術を用いて通信するためのプログラム・コードと を備える、コンピュータ・プログラム。
- 24無線通信のための装置であって、 第1のラジオ・アクセス技術における送信ギャップに帰着する、通常動作におけるアップリンク許可より少数のアップリンク許可が受信されるように、修正された送信バッファ・ステータス値を生成するために送信バッファ・ステータス・レポート値を低減する手段と、 前記送信ギャップの間に、第2のラジオ・アクセス技術を用いて通信する手段と、 を備える装置。
Independent claims24
99 paragraphs, as filed
Cross-reference to related applications
This application was filed on September 21, 2010 and is entitled "LTE BUFFER STATUS REPORT CONTROL FOR CREATING TRANSMISSION GAPS". , Claim the interests of No. 993. This disclosure is expressly incorporated herein by reference in its entirety.
This description generally relates to multi-radio technology, and more particularly to coexistence technology for multi-radio devices.
Wireless communication systems have been widely developed to provide various types of content such as voice, data and the like. These systems can be multiple access systems that can support communication with multiple users by sharing available system resources (eg, bandwidth, transmit power, etc.). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, 3GPP long term evolution (LTE) systems, and Includes orthogonal frequency division multiple access (OFDMA) systems and the like.
Generally, a wireless multiple access communication system can support communication for multiple wireless terminals at the same time. Each terminal communicates with one or more base stations via transmission via forward and reverse links. A forward link (ie, downlink) refers to a communication link from a base station to a terminal, and a reverse link (ie, uplink) refers to a communication link from a terminal to a base station. This communication link can be established by a single input single output, multiple input single output, or multiple input multiple output (MIMO) system.
Some conventional advanced devices include multiple radios to transmit / receive using different radio access techniques. Examples of RAT are, for example, Universal Mobile Telecommunications System (UMTS), Global Mobile Communication System (GSM®), cdma2000, WiMAX, WLAN (eg WiFi), Bluetooth®, LTE. Etc. are included.
Examples of mobile devices include, for example, LTE user devices (UEs) such as 4th generation (4G) mobile phones. Such a 4G phone may include different radios to provide different features to the user. For the purposes of this example, 4G phones include LTE radios for voice and data, IEEE 802.11 (WiFi) radios, Global Positioning System (GPS) radios, and Bluetooth radios. Here, two or all four of the above can operate at the same time. Different radios provide useful features for the phone, but including them in a single device creates coexistence issues. Specifically, the operation of one radio may, in some cases, interfere with the operation of another radio by means of a radiation mechanism, a conduction mechanism, a resource collision mechanism, and / or other interference mechanisms. The coexistence problem includes such interference.
This is especially true for LTE uplink channels, which are adjacent to the Industrial Scientific and Medical (ISM) band and can cause interference. It is noted that the Bluetooth channel and some wireless LAN (WLAN) channels are within the ISM band. In some cases, due to some Bluetooth channel conditions, the Bluetooth error rate can be unacceptable if LTE is active, even on some channels in band 7 or band 40. Even if LTE does not have a significant performance degradation, simultaneous operation with Bluetooth can result in disruption of voice services terminating in the Bluetooth handset. Such interruptions can be unacceptable to the customer. Similar problems exist when LTE transmission interferes with GPS. Currently, LTE does not suffer performance degradation by itself, so there is no mechanism that can solve this problem.
Especially with reference to LTE, it is noted that the UE communicates with the eNB to notify the Evolved Node B (eNB; eg, a base station for a wireless communication network) of the interference observed by the UE on the downlink. Will be done. In addition, the eNB can use the downlink error rate to estimate interference in the UE. In some cases, the eNB and UE may work together to find a solution that reduces interference in the UE, even radio interference within the UE itself. However, in traditional LTE, downlink interference estimates may not be appropriate to comprehensively address interference.
In one case, the LTE uplink signal interferes with the Bluetooth signal or the WLAN signal. However, such interference is not reflected in the downlink measurement report in the eNB. As a result, one-way operation in some parts of the UE (eg moving the uplink signal to another channel) is unaware of the uplink coexistence problem and cancels this one-way operation. Can be disturbed by the eNB seeking. For example, even if the UE reestablishes a connection on a different frequency channel, the network can still hand over the UE to return to the original frequency channel destroyed by intra-device interference. This is a common scenario. This is because the desired signal strength in the disrupted channel can often be highly reflected in the measurement report for the new channel, based on the reference signal received power (RSRP) to the eNB. Therefore, when the eNB uses the RSRP report to make a handover decision, a ping-pong effect can occur between the destroyed channel and the desired channel.
For example, other unidirectional operation in a part of the UE, such as simply stopping the uplink communication without adjusting the eNB, can result in a power loop malfunction in the eNB. Further problems that exist in traditional LTE include a general lack of capacity in some UEs to propose the desired configuration as an alternative to configurations with coexistence problems. For at least these reasons, the uplink coexistence problem in the UE can remain unresolved for a long time with respect to the performance and efficiency of other radios in the UE.
In one aspect, a method of wireless communication is disclosed. This method involves generating a modified transmit buffer status value so that the uplink allow, which is the transmit gap in the first radio access technique, is received less. The method also includes communicating using a second radio access technique during the transmission gap.
Another aspect discloses wireless communication having a memory and at least one processor connected to the memory. The processor (s) are configured to generate a modified transmit buffer status report so that the uplink permissions, which are the transmit gaps in the first radio access technology, are received less. .. Processors (s) are also configured to communicate using a second radio access technique during the transmission gap.
In another aspect, a computer program product for wireless communication in a wireless network is disclosed. Computer-readable media, when executed by a processor (s), have fewer uplink permissions to the processor (s) that would be a transmission gap in the first radio access technology. It has recorded program code to perform an operation that produces a modified transmit buffer status value so that it is not received. The program code also causes the processor (s) to communicate during the transmission gap using a second radio access technique.
Another aspect discloses a device that includes means for generating a modified transmit buffer status value so that the uplink permissions that provide the transmit gap in the first radio access technique are received less. The device also includes means of communicating using a second radio access technique during the transmission gap.
Further features and advantages of this disclosure will be described below. It should be understood by those skilled in the art that this disclosure can be readily used as a basis for modifying or designing other configurations to achieve the same objectives as those of this disclosure. It should also be understood by those skilled in the art that such equivalent configurations do not deviate from the teachings of the disclosures set forth in the claims. Good from the following description, when new features believed to be features of the present disclosure, with respect to both the method and configuration of operation, along with additional objectives and advantages, are considered in connection with the accompanying drawings. Will be understood. However, it should be clearly understood that each of the drawings is provided for purposes of illustration and illustration only and is not intended as a definition of the limitations of this disclosure.
The features, properties, and advantages of the present disclosure will become more apparent from the detailed description below, when the same reference code is taken into account with the drawings that identify the same thing throughout.<figref num="1">FIG. 1 illustrates a multiple access wireless communication system according to one embodiment.</figref><figref num="2">FIG. 2 is a block diagram of a communication system according to one embodiment.</figref><figref num="3">FIG. 3 illustrates a typical frame structure in downlink long term evolution (LTE) communication.</figref><figref num="4">FIG. 4 is a block diagram that conceptually illustrates a typical frame structure in uplink long term evolution (LTE) communication.</figref><figref num="5">FIG. 5 illustrates a typical wireless communication environment.</figref><figref num="6">FIG. 6 is a block diagram of an example design of a multi-radio wireless device.</figref><figref num="7">FIG. 7 is a graph showing the potential collisions between each of the seven example radios in a given decision period.</figref><figref num="8">FIG. 8 is a diagram showing an example of the operation of the coexistence manager (CxM) with respect to time.</figref><figref num="9">FIG. 9 is a block diagram illustrating adjacent frequency bands.</figref><figref num="10">FIG. 10 is a block diagram of a system for providing support within a wireless communication environment for multi-radio coexistence management according to one aspect of the present disclosure.</figref><figref num="11">FIG. 11 is an illustration illustrating a buffer status report timeline without retransmissions, according to one aspect of the present disclosure.</figref><figref num="12">FIG. 12 is an illustration illustrating a buffer status report timeline with one retransmission, according to one aspect of the present disclosure.</figref><figref num="13">FIG. 13 is a block diagram illustrating that a transmission gap is created according to one aspect of the present disclosure.</figref>
Various aspects of the disclosure provide techniques for alleviating coexistence problems in multi-radio devices. Here, there can be significant intra-device coexistence problems, eg, between the LTE band and the industrial, scientific, and medical (ISM) bands (eg, for BT / WLAN). As mentioned above, there are some coexistence problems because the eNB is unaware of the interference on the UE side received by other radios. According to one embodiment, the UE declares a radio link failure (RLF) and autonomously accesses a new channel or radio access technology (RAT) if there is a coexistence problem with the current channel. The UE may declare RLF in some examples for the following reasons: 1) UE reception is affected by interference due to coexistence. 2) The UE transmitter is causing destructive interference with another radio. The UE then sends a message indicating the coexistence problem to the eNB while reestablishing the connection on the new channel or RAT. Upon receiving this message, the eNB becomes aware of the coexistence problem.
The techniques described herein include, for example, code division multiple access (CDMA) networks, time division multiple connection (TDMA) networks, frequency division multiple connection (FDMA) networks, orthogonal frequency division multiple connection (OFDA) networks, singles. It can be used for various wireless communication networks such as carrier FDMA (SC-FDMA) networks. The terms "network" and "system" are often used interchangeably. CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc., for example. UTRA includes wideband CDMA (W-CDMA) and low chip rate (LCR). cdma2000 covers IS-2000, IS-95, and IS-856 standards. The TDMA network can implement radio technologies such as, for example, the Global Mobile Communication System (GSM). OFDMA networks include, for example, Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE. Radio technologies such as 802.20, flash-OFDM, etc. can be implemented. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS). Long Term Evolution (LTE) is the latest release of UMTS using E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from an organization named "Third Generation Partnership Program" (3GPP). CDMA2000 is described in a document from an organization named "3rd Generation Partnership Plan 2" (3GPP2). These various radio technologies and standards are known in the art. For clarity, some aspects of these techniques are described below for LTE, and LTE terminology is used as part of the description below.
Single Carrier Frequency Division Multiple Access (SC-FDMA) utilizing single carrier modulation and frequency domain equalization is a technique that can be utilized with the various aspects described herein. SC-FDMA has similar performance to OFDMA systems and has essentially the same overall complexity. The SC-FDMA signal has a low peak-to-average power ratio (PAPR) due to its unique single carrier structure. SC-FDMA has received a great deal of attention in uplink communication, where low PAPR is of great benefit to mobile terminals in terms of transmission power efficiency. This is currently the operating premise for an uplink multiple access scheme in 3GPP Long Term Evolution (LTE) or Evolved UTRA.
With reference to FIG. 1, a multiple access wireless communication system according to one embodiment is illustrated. Evolved node B100 (eNB) includes a computer 115 having processing resources and memory resources for managing LTE communication by allocating resources and parameters, allowing / denying requests from user equipment, and the like. The eNB 100 also includes a plurality of antenna groups, one group comprising the antenna 104 and the antenna 106, another group comprising the antenna 108 and the antenna 110, and yet another group including the antenna 112 and the antenna. Includes 114. In FIG. 1, only two antennas are shown for each antenna group. However, more or less antennas may be utilized for each antenna group. The user equipment (UE) 116 (also referred to as an access terminal (AT)) communicates with the antennas 112 and 114, while the antennas 112 and 114 transmit information to the UE 116 via the uplink (UL) 188. The UE 122 communicates with the antennas 106 and 108, the antennas 106 and 108 transmit information to the UE 122 by the downlink (DL) 126 and receive information from the UE 122 by the uplink 124. In frequency division duplex (FDD) systems, communication links 118, 120, 124 and 126 may use different frequencies for communication. For example, the downlink 120 may use a different frequency than that used by the uplink 118.
Each group of areas and / or antennas designed to communicate is often referred to as a sector of the eNB. In this aspect, each antenna group is designed to communicate with UEs within a sector of the area covered by the eNB 100.
In downlink 120,126 communication, the eNB 100 transmit antenna utilizes beamforming to improve the uplink signal-to-noise ratio of the other UEs 116, 122. In addition, eNBs that utilize beamforming to transmit to UEs that are randomly scattered over the effective communication range are for UEs in neighboring cells rather than UEs that are transmitting with a single antenna for all UEs. It causes little interference.
An eNB is a fixed station used to communicate with a terminal and may also be referred to as an access point, base station, or some other terminology. UEs can also be referred to by access terminals, wireless communication devices, terminals, or some other equivalent terminology.
FIG. 2 is a block diagram of aspects of a transmitter system 210 (also known as an eNB) and a receiver system 250 (also known as a UE) in MIMO system 200. In some cases, both the UE and the eNB each have a transceiver that includes a transmitter system and a receiver system. In the transmitter system 210, the traffic data of many data streams is provided from the data source 212 to the transmit (TX) data processor 214.
Multiple MIMO systems (N) for data transmission<sub>T</sub>Multiple transmitting antennas and multiple (N)<sub>R</sub>) With the receiving antenna. N<sub>T</sub>Transmitting antennas and N<sub>R</sub>The MIMO channel formed by the number of receiving antennas is N, which is also called a spatial channel.<sub>S</sub>It can be divided into independent channels. Here, N<sub>S</sub> {N<sub>T</sub>, N<sub>R</sub>}. N<sub>S</sub>Each of the independent channels corresponds to a dimension. MIMO systems can provide improved performance (eg, higher throughput and / or higher reliability) when the additional dimensions generated by multiple transmit and receive antennas are utilized. ..
MIMO systems support time division duplex (TDD) systems and frequency division duplex (FDD) systems. In the TDD system, the uplink transmission and the downlink transmission are in the same frequency domain so that the downlink channel can be estimated from the uplink channel by a mutual principle. This allows the eNB to extract the transmit beamforming gain in the downlink when multiple antennas are available in the eNB.
In the embodiment, each data stream is transmitted through its respective transmitting antenna. TX data processor 214 formats and encodes the traffic data for each data stream based on the particular encoding scheme selected for the data stream to provide the encoded data. , Interleave.
The encoded data in each data stream can be multiplexed with pilot data using OFDM technology. Pilot data is generally a known data pattern that is processed in a known manner and can be used in a receiver system to estimate channel response. The multiplexed pilot and encoded data for each data stream will be in a particular modulation scheme selected for the data stream (eg, BPSK, QPSK, M-PSK, or M-QAM, etc.). Based on the modulation (eg, symbol map), the modulation symbols are provided. The data rate, coding, and modulation of each data stream can be determined by instructions executed by processor 230 operating with memory 232.
The modulation symbols for each data stream are then provided to the TX MIMO processor 220, which further processes the modulation symbols (eg, for OFDM). The TX MIMO processor 220 was then N<sub>T</sub>N modulation symbol streams<sub>T</sub>Provided to a number of transmitters (TMTR) 222a to 222t. In some embodiments, the TX MIMO processor 220 applies beamforming weights to a symbol of the data stream and to the antenna on which this symbol is transmitted.
Each transmitter 222 receives and processes each symbol stream to provide one or more analog signals, and further provides a suitable modulated signal for transmission over MIMO channels. , Adjust this analog signal (eg, amplify, filter, and upconvert). N from transmitters 222a to 222t<sub>T</sub>The modulated signals are then N<sub>T</sub>It is transmitted from each of the antennas 224a to 224t.
In the receiver system 250, the transmitted modulated signal is N.<sub>R</sub>Received by the antennas 252a to 252r, the received signal from each antenna 252 is provided to the respective receivers (RCVR) 254a to 254r. Each receiver 254 tunes (eg, filters, amplifies, and downconverts) each received signal, digitizes the tuned signal to provide a sample, and further processes this sample for correspondence. Provides a "received" symbol stream.
RX data processor 260 is N<sub>R</sub>Receivers 254 to N<sub>R</sub>N. Receives symbol streams and processes the received symbol streams based on specific receiver processing techniques.<sub>R</sub>Provides a stream of "detected" symbols. The RX data processor 260 then demodulates, deinterleaves, and decodes each detected symbol stream to restore the traffic data for this data stream. The processing by the RX data processor 260 is complementary to that performed by the TX MIMO processor 220 and the TX data processor 214 at base station 210.
Processor 270 (which works with memory 272) periodically determines which precoding matrix to use (see below). Processor 270 defines an uplink message that has a matrix index section and a rank value section.
Uplink messages can contain various types of information about communication links and / or received data streams. The uplink message is then processed by the TX data processor 238, which receives the traffic data of many data streams from the data source 236, modulated by the modulator 280, tuned by the transmitters 254a-254r, and the base station. It is sent back to 210.
In the transmitter system 210, the modulated signal from the receiver system 250 is received by the antenna 224, tuned by the receiver 222, demodulated by the demodulator 240, processed by the RX data processor 242, and received by the receiver. The uplink message sent by system 250 is extracted. In addition, processor 230 determines which precoding matrix to use to determine the beamforming weights, and then processes this extracted message.
FIG. 3 is a block diagram that conceptually illustrates a typical frame structure in downlink long term evolution (LTE) communication. The downlink transmission timeline can be divided into units of radio frames. Each radio frame has a predetermined duration (eg, such as 10 milliseconds (ms)) and can be divided into 10 subframes with 0-9 indexes. Each subframe can contain two slots. Therefore, each radio frame may contain 20 slots with 0-19 indexes. Each slot contains an L symbol period, for a normal cyclic prefix (eg, as shown in FIG. 3), for example, for an extended cyclic prefix containing 7 symbol periods. , Can include 6 symbol periods. In each subframe, 2L symbol periods can be assigned an index of 0 to 2L-1. Available time frequency resources can be divided into resource blocks. Each resource block can cover N subcarriers (eg, 12 subcarriers) in one slot.
In LTE, the eNB may transmit a primary sync signal (PSS) and a secondary sync signal (SSS) for each cell in the eNB. As shown in FIG. 3, PSS and SSS can be transmitted in symbol period 6 and symbol period 5, respectively, in subframe 0 and subframe 5 of each radio frame having a normal cyclic prefix. These sync signals can be used by the UE for cell detection and acquisition. The eNB may also transmit a physical broadcast channel (PBCH) during symbol periods 0 to 3 in slot 1 of subframe 0. The PBCH may transmit some system information.
The eNB may transmit a cell-specific reference signal (CRS) for each cell in the eNB. The CRS is transmitted with symbols 0,1,4 of each slot in the case of a normal cyclic prefix, and symbols 0,1,3 of each slot in the case of an extended cyclic prefix. Can be sent at. CRS can be used by UEs for coherent demodulation of physical channels, timing and frequency tracking, radio link monitoring (RLM), reference signal reception power (RSRP) and reference signal reception quality (RSRQ) measurements, etc. ..
As can be seen in FIG. 3, the eNB may transmit the Physical Control Format Indicator Channel (PCFICH) during the first symbol period of each subframe. The PCFICH may convey the number of symbol periods (M) used for the control channel. Here, M is equal to 1, 2, or 3, and can change from subframe to subframe. M can also be equal to 4 for a small system bandwidth, for example less than 10 resource blocks. In the example shown in FIG. 3, M = 3. The eNB may transmit a physical HARQ indicator channel (PHICH) and a physical downlink control channel (PDCCH) during the first M symbol periods of each subframe. PDCCH and PHICH are also included in the first three symbol periods in the example shown in FIG. PHICH may transmit information to support hybrid auto-repetition requests (HARQ). The PDCCH may transmit information about resource allocation for the UE and control information for the downlink channel. The eNB may also transmit a physical downlink shared channel (PDSCH) for the remaining symbolic period of each subframe. The PDSCH may transmit data for the UE scheduled for data transmission over the downlink. The various signals and channels in LTE are publicly available "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation". ), 3GPP TS 36.211.
The eNB may transmit PSS, SSS, and PBCH at 1.08 MHz in the middle of the system bandwidth used by the eNB. The eNB may transmit PCFICH and PHICH over the entire system bandwidth during each symbol period in which these channels are transmitted. The eNB may transmit PDCCH to a group of UEs in some part of the system bandwidth. The eNB may transmit PDSCH to a particular UE at a particular portion of the system bandwidth. The eNB may transmit PSS, SSS, PBCH, PCFICH, and PHICH to all UEs in a broadcast manner, and may transmit PDCCH to a specific UE in a unicast manner. Furthermore, PDSCH can also be transmitted to a specific UE by a unicast method.
Many resource elements may be available during each symbol period. Each resource element can cover one subcarrier in one symbol period. It can then be used to transmit a single modulated symbol that is real or complex. In each symbol period, resource elements that are not used for the reference signal can be organized into resource element groups (REGs). Each REG can contain four resource elements within one symbol period. PCFICH may occupy 4 REGs within symbol period 0. These can be arranged almost evenly over frequencies. PHICH may occupy three REGs within one or more configurable symbol periods. These can be dispersed over frequencies. For example, all three REGs for PHICH can belong to symbol period 0. Alternatively, it can be distributed over symbol periods 0, 1, 2. The PDCCH may occupy 9, 18, 32, or 64 REGs within the first M symbol period. These can be selected from the available REGs. Only certain combinations of multiple REGs can be tolerated for PDCCH.
The UE may recognize the particular REG used for PHICH and PCFICH. The UE may search for different combinations of REGs in search of PDCCH. The number of combinations to explore is generally less than the number of combinations allowed for PDCCH. The eNB may transmit the PDCCH to any UE in the combination searched by the UE.
FIG. 4 is a block diagram that conceptually illustrates a typical frame structure in uplink long term evolution (LTE) communication. The resource blocks (RBs) available for the uplink can be divided into a data section and a control section. The control section is formed at the two ends of the system bandwidth and can have a configurable size. Resource blocks in the control section can be assigned to the UE for transmission of control information. The data section can contain all resource blocks not included in the control section. As a result of the design in FIG. 4, the data section will include contiguous subcarriers. This allows a single UE to be assigned all of its contiguous subcarriers within the data section.
The UE may be assigned a resource block in the control section to send control information to the eNB. The UE may also be assigned a resource block within the data section to send data to enode B. The UE may transmit control information on the physical uplink control channel (PUCCH) in the resource block allocated in the control section. The UE may transmit data alone or both data and control information on a physical uplink shared channel (PUSCH) with resource blocks allocated in the data section. Uplink transmission extends to both slots of subframes and can hop across frequencies, as shown in FIG.
PSS, SSS, CRS, PBCH, PUCCH, and PUSCH in LTE are publicly available "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulations" (Evolved Universal Terrestrial Radio Access (E-). UTRA); Physical Channels and Modulation), described in 3GPP TS 36.211.
Aspects describe systems and methods for providing support within a wireless communication environment, such as a 3GPP LTE environment, to facilitate multi-radio coexistence resolution.
As shown in FIG. 5, an example of a wireless communication environment 500 in which various aspects described herein can function is illustrated. The wireless communication environment 500 may include a wireless device 510 capable of communicating with a plurality of communication systems. These systems include, for example, one or more cellular systems 520 and / or 530, one or more WLAN systems 540 and / or 550, one or more wireless personal area network (WPAN) systems 560, 1 or It may include a plurality of broadcast systems 570, one or more satellite positioning systems 580, other systems not shown in FIG. 5, or any combination thereof. It should be recognized that in the following description, the terms "network" and "system" can often be used interchangeably.
The cellular systems 520 and 530 can be CDMA, TDMA, FDMA, OFDMA, single carrier FDMA (SC-FDMA), or other suitable systems, respectively. CDMA systems can implement radio technologies such as Universal Terrestrial Radio Access (UTRA) and cdma2000, for example. UTRA includes wideband CDMA (WCDMA®) and other variants of CDMA. In addition, cdma2000 covers the IS-2000 (CDMA2000 1X) standard, the IS-95 standard, and the IS-856 (HRPD) standard. The TDMA system can realize radio technology such as, for example, a global mobile communication system (GSM), a digital advanced mobile telephone system (D-AMPS), and the like. OFDMA systems include, for example, Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.16 (WiMAX), IEEE. Wireless technologies such as 802.20, Flash-OFDM®, etc. 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 documents from an organization named "Third Generation Partnership Program" (3GPP). cdma2000 and UMB are described in a document from an organization named "3rd Generation Partnership Plan 2" (3GPP2). In aspects, the cellular system 520 may include many base stations 522 that may support two-way communication for wireless devices within the effective communication range. Similarly, the cellular system 530 may include many base stations 532 that may support bidirectional communication for wireless devices within the effective range.
The WLAN systems 540 and 550 can implement radio technologies such as, for example, IEEE 802.11 (WiFi), Hiperlan, etc., respectively. The WLAN system 540 may include one or more access points 542 that may support bidirectional communication. Similarly, the WLAN system 550 may include one or more access points 552 that may support bidirectional communication. The WPAN system 560 may implement, for example, Bluetooth (BT), IEEE 802.15, and the like. In addition, the WPAN system 560 may support two-way communication for various devices such as wireless device 510, headset 562, computer 564, mouse 566 and the like.
The broadcast system 570 can be a television (TV) broadcast system, a frequency modulation (FM) broadcast system, a digital broadcast system, and the like. Digital broadcast systems include, for example, MediaFLO®, Digital Video Broadcast for Handheld (DVB-H), Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting (IDSB). Radio technology such as -T) etc. can be implemented. In addition, broadcast system 540 may include one or more broadcast stations 572 that may support one-way communication.
Satellite Positioning System 580 includes the US Global Positioning System (GPS), the European Galileo System, the Russian Glonass System, the quasi-zenith satellite system on Japan, the Indian Region Navigation Satellite System (IRNSS) on India, and Hokuto on China. It can be a satellite navigation system and / or any other suitable system. In addition, the satellite positioning system 580 may include many satellites 582 that transmit signals for positioning.
In aspects, the wireless device 510 may be stationary or mobile and may be referred to as a user device (UE), mobile station, mobile device, terminal, access terminal, subscriber unit, station, or the like.
The wireless device 510 can be a cellular telephone, a personal digital assistant (PDA), a wireless modem, a handheld device, a laptop computer, a cordless telephone, a wireless local loop (WLL) station, or the like.
In addition, the wireless device 510 may be a device with cellular system 520 and / or cellular system 530, WLAN system 540 and / or WLAN system 550, WPAN system 560, and / or any other suitable system (single or). Can perform bidirectional communication with multiple) and / or devices (s) and / or devices (s).
The wireless device 510 may further or instead receive signals from the broadcast system 570 and / or the satellite positioning system 580.
In general, it should be recognized that the wireless device 510 can communicate with any number of systems at a given moment.
In addition, the wireless device 510 may experience coexistence problems between various of the component radio devices that can operate simultaneously.
Therefore, device 510 includes a coexistence manager (CxM (not shown)) having functional modules for detecting and mitigating coexistence problems, as detailed below.
Next, moving to FIG. 6, an example of the design for the multi-radio radio device 600 is illustrated, and a block diagram that can be used as an implementation of the radio 510 of FIG. 5 is provided.
As illustrated in FIG. 6, the wireless device 600 may include N radios 620a-620n. These can be connected to N antennas 610a to 610n. Here, N can be any integer value.
However, it should also be recognized that each radio 620 is connected to any number of antennas 610 and that multiple radios 620 can share a given antenna 610.
In general, the radio 620 can be a unit that radiates or emits energy in the electromagnetic spectrum, receives the energy in the electromagnetic spectrum, or produces energy propagated by conduction means. By way of example, the radio 620 can be a unit that sends a signal to a system or device, or can be a unit that receives a signal from a system or device. Therefore, it can be recognized that radio 620 can be used to support wireless communication. In another example, the radio 620 can also be a unit that emits noise that can impact the performance of other radios (eg, screens on computers, circuit boards, etc.). Therefore, it can be further recognized that the radio 620 can also be a unit that emits noise and interference without supporting wireless communication.
In aspects, each radio 620 may support communication with one or more systems. The plurality of radios 620 may be used for a given system further or instead, for example, to transmit or receive in different frequency bands (eg, cellular and PCS bands).
In another aspect, the digital processor 630 may be connected to radios 620a-620n. Then, for example, various functions for processing the data transmitted via the radio 620 or the received data can be executed. The processing of each radio 620 may depend on the radio technology supported by that radio. And it may include encryption, coding, modulation, etc. for the transmitter, demodulation, decryption, decryption, etc. for the receiver, and so on. In one example, as commonly described herein, the digital processor 630 may include a CxM640 that can control the operation of the radio 620 in order to improve the performance of the wireless device 600. CxM manager 640 may have access to database 644 which may store information used to control the operation of radio 620. As further described below, CxM640 may be adapted for a variety of techniques for reducing interference between radios. In one example, the CxM640 requires a DRX cycle or measurement gap pattern that allows the ISM radio to communicate during the period when LTE is inactive.
For simplicity, the digital processor 630 is shown in FIG. 6 as a single processor. However, it should be recognized that the digital processor 630 can include any number of processors, controllers, memory, etc. In one example, the controller / processor 650 may direct the operation of various units within the wireless device 600. Further, or instead, memory 652 may store program code and data for the wireless device 600. The digital processor 630, controller / processor 650, and memory 652 can be implemented in one or more integrated circuits (ICs), application specific integrated circuits (ASICs), and the like. According to a specific and non-limiting example, the digital processor 630 may be implemented in a mobile modem (MSM) ASIC.
In aspects, the CxM640 may manage the operation of each radio 620 utilized by the radio device 600 to avoid interference and / or other performance degradation associated with collisions between the respective radios 620. .. The CxM640 may, for example, perform one or more processes as illustrated in FIG. By further illustration, graph 700 in FIG. 7 represents each potential collision between the seven radio examples during a given decision period. In the example illustrated in Graph 700, the seven radios are WLAN transmitter (Tw), LTE transmitter (Tl), FM transmitter (Tf), GSM / WCDMA transmitter (Tc / Tw), LTE receiver ( Includes Rl), Bluetooth receiver (Rb), and GPS receiver (Rg). The four transmitters are represented by the four nodes on the left side of the graph 700. The three receivers are represented by the three nodes on the right side of the graph 700.
The potential collision between the transmitter and the receiver is represented on Graph 700 by a branch connecting the transmitter node and the receiver node. Therefore, in the example illustrated in Graph 700, the collision is (1) between the WLAN transmitter (Tw) and the Bluetooth receiver (Rb), and (2) the LTE transmitter (Tl) and the Bluetooth receiver (Rb). Between (3) WLAN transmitter (Tw) and LTE receiver (Rl), (4) between FM transmitter (Tf) and GPS receiver (Rg), (5) GSM / WCDMA It may exist between the transmitter (Tc / Tw) and the GPS receiver (Rg).
In one embodiment, the example of CxM640 may operate temporally in a manner as shown, for example, by illustration 800 in FIG. As illustrated in Illustration 800, the timeline for CxM operation can be divided into decision units (DUs). This is any suitable constant or non-constant length (eg, 100 microseconds) when the notification is processed, commands are provided to various radios 620, and / or other The action can be a response phase (eg, 20 microseconds) performed based on the action taken in the evaluation phase. In one example, the timeline shown in Illustrated 800 is the worst-case behavior of the timeline, such as the timing of a response in the case where notifications are obtained from a given radio immediately after the end of the notification phase in a given DU. Can have latency parameters defined by.
Band 7 (for Frequency Division Duplex (FDD) Uplink), Band 40 (for Time Division Duplex (TDD) Communication), and Band 39 (for TDD Downlink), as shown in FIG. Long Term Evolution (LTE) in is adjacent to the 2.4 GHz industrial, scientific, and medical (ISM) band used by Bluetooth (BT) technology and Wireless Local Area Network (WLAN) technology. There is. Frequency schemes for these bands have limited or absent guard bands that allow traditional filtering solutions to avoid interference at adjacent frequencies. For example, the 20 MHz guard band exists between the ISM and the band 7, but there is no guard band between the ISM and the band 40.
In order to comply with appropriate standards, communication devices operating in a particular band should be able to operate over the specified frequency range. For example, to comply with LTE, mobile stations / user equipment have both band 40 (2300-2400 MHz) and band 7 (2500-2570 MHz) as defined by the 3rd Generation Partnership Program (3GPP). You must be able to communicate as a whole. The device applies a filter that overlaps with other bands without sufficient guard band. This causes band interference. Since the band 40 filters are 100 MHz wide to cover the entire band, rollovers from these filters cross the ISM band. This causes interference. Similarly, ISM devices that use the entire ISM band (eg, 2401 MHz to approximately 2480 MHz) will apply a filter that rolls over to neighboring bands 40 and 7. This can lead to interference.
In-device coexistence problems can exist with respect to UEs between resources, such as between LTE and ISM bands (for example, for Bluetooth / WAN). In current LTE implementations, the interference problem for LTE is a downlink that the eNB can use to make inter-frequency or inter-RAT handoff decisions, eg, to move the LTE to a channel or RAT where the coexistence problem does not exist. It is reflected in the error rate and / or the downlink measurements reported by the UE (eg, reference signal reception quality (RSRQ) metrics, etc.). However, if, for example, the LTE uplink causes interference with Bluetooth / WLAN, but the LTE downlink does not observe interference from Bluetooth / WLAN, then these existing techniques will not work. Can be recognized. More specifically, even if the UE autonomously moves itself to another channel on the uplink, the eNB will in some cases move the UE to the problematic channel for load leveling purposes. Can be returned by handover to. In any case, it can be recognized that existing techniques do not facilitate the use of bandwidth in problematic channels in the most efficient manner.
Moving to FIG. 10, a block diagram of a system 1000 for providing support within a wireless communication environment for multi-radio coexistence management is illustrated. In aspects, the system 1000 may perform uplink and / or downlink communication with each other and / or any other suitable communication of the UE 1010 and eNB 1040, and / or others in the system 1000. It can contain any entity. In one example, the UE 1010 and / or eNB 1040 uses a variety of resources that include frequency channels and subbands, some of which can potentially collide with other radio resources (eg, broadband radios such as LTE modems). Can operate to communicate with each other. Therefore, as commonly described herein, the UE 1010 may utilize a variety of techniques for managing coexistence between multiple radios utilized by the UE 1010.
At least to mitigate the aforementioned drawbacks, the UE 1010 utilizes the respective features described herein and exemplified by System 1000 to facilitate support for multi-radio coexistence within the UE 1010. Can be done. For example, a channel monitoring module 1012, a channel coexistence analyzer module 1014, and a buffer status report (BSR) module 1016 may be provided. The channel monitoring module 1012 monitors the performance of the communication channel. The channel coexistence analyzer module 1014 determines if there may be conflicts between radio technologies in the UE. The buffer status report module 1016 adjusts the buffer status report to manage potential coexistence issues. In some examples, various modules 1012-1016 may be implemented as part of a coexistence manager, such as the CxM1040 in FIG. Various modules 1012-1016 and other modules can be configured to carry out the embodiments described herein.
In-device coexistence problems can exist between industry, technology and medical (ISM) technologies such as Bluetooth and wireless local area networks (WLAN) and long term evolution (LTE) technologies. In particular, the LTE transmit (Tx) subframe can interfere with Bluetooth reception or WLAN reception for LTE deployed in band 7 or band 40. High data rates or activity on LTE uplinks can result in long LTE transmissions. This can interfere with Bluetooth reception or WLAN reception. Similar problems may exist in the case of LTE GPS (Global Positioning System) coexistence.
The e-node B allocates LTE uplink allocations in the UE based on transmit buffer status values, such as buffer status report values. Generally, the buffer status report is used to report the amount of pending bytes in the UE, so e-node B may provide sufficient uplink permissions to allow the UE to send data. .. In normal operation of high rate applications, the BSR may report the number of bytes currently pending. If the number of pending bytes is large, the e-node B may provide continuous uplink permissions. In one configuration of the present disclosure, the UE may control LTE transmission activity by controlling the value of the buffer status report (BSR) transmitted by the UE to e-node B. This offsets the time when the e-node B schedules the UE to transmit and efficiently creates the LTE uplink transmit gap.
In one example, the channel monitoring module 1012, with the help of the channel coexistence analyzer 1014 and / or other components, monitors one or more communication channels utilized by the UE and seeks coexistence issues. Such channels can be monitored. This monitoring recognizes that interference has caused or is expected to result in unacceptable performance. In one example, a device with multiple radios is equipped to detect interference. Further, or instead, the device may be programmed to recognize that a coexistence problem exists when a radio uses a channel. Further, or instead, the device may be programmed to recognize that some radios operating at the same time may have coexistence problems.
Once the coexistence problem has been identified, the buffer status report module 1016 may report modified buffer status report values that have smaller values than the actual buffer status report values. For example, in one configuration, the e-node B can reduce the buffer status report value to a certain rate (eg, 1/2, 1/4, etc.) or even lower. It will only provide the UE with less uplink permissions. If e-node B provides less uplink permissions, a gap is created in the LTE transmission of the UE. The resulting transmission gap can be used by reception activity and / or other techniques for reception-related other transmission activity (eg, Bluetooth, WLAN).
In another configuration, the UE may modify the buffer status report value adjusted by the coexistence manager based on the status of other radios known to the coexistence manager. In particular, a coexistence manager, such as coexistence manager 640, is a type of traffic in another technology (eg, Bluetooth asynchronous connection oriented (ACL) communication, Bluetooth Advanced Audio Distribution Profile (A2DP) communication, WLAN, etc.). The buffer status report value can be adjusted based on.
In one aspect, the modified buffer status report can be sent continuously before the previously reported buffer level is exhausted, thus eliminating the need to send a scheduling request and a low duty cycle connection. Can be maintained. In other words, the UE does not send scheduling requests to maintain the generated transmission gap, even if there is data in the buffer. By holding the scheduling request in this way, normal transmission can be interrupted. Normal transmissions can be restored by resuming use of unmodified buffer status report values. This aspect assumes that e-node B does not continuously service the buffer status report.
In one configuration, long-term scheduling and non-scheduling time variations can be implemented. In particular, the UE may regulate the value and occurrence of buffer status reports to generate long on and off periods in LTE. For example, if the buffer status report value has not been modified, e-node B may continuously receive scheduling requests. If the value of the buffer status report is reduced, e-node B receives the scheduling request only for a certain period of time. If e-node B provides the number of bytes specified in the buffer status report, e-node B will not give the UE any further uplink permissions. If the UE recognizes that another technology has finished its operation, LTE may resume transmission. The UE can then send a scheduling request followed by a new value in the Buffer Status Report (BSR) to eNodeB. This will produce long on periods and long off periods. In one example, the duration of this period can be tens of milliseconds. Other technologies, such as WLAN or Bluetooth, can take steps to avoid operation during the LTE on period.
More specifically, in one example, at the start of the LTE on period, the UE transmits BSR = x based on the current rate and length of the on period. After e-node B has serviced the "x" bytes, e-node B does not grant any further permission for a period of time. The UE enters the off period if it does not receive a new permit.
FIG. 11 is an example of a BSR timeline without retransmissions, where each block represents a 1 millisecond subframe. The beginning of the line 1101, sending the downlink transmitted from the e Node B to the UE indicating the signal. The final line 1102 represents the uplink transmission sent from the UE to the e-node B. At time 1110, the UE sends a scheduling request (SR). After 4 subframes, at time 1112, the first uplink permission is received by the UE. At time 1114, the UE sends a buffer status report (BSR) with a value equal to X to enode B. This is a series of uplink permissions and marks the LTE uplink on period. The LTE on period ends approximately 4 subframes after receiving the last uplink permission, and the LTE uplink off period begins at time 1116. This creates a gap that allows transmission by another technique. At time 1120, the UE sends a scheduling request (SR), after which at time 1122, the uplink permission is received. The LTE uplink on period begins at time 1124 and the UE sets the value X for the Buffer Status Report (BSR).
FIG. 12 is an example of a buffer status report timeline with two transmissions (ie, one first transmission and one retransmission). The first line 1201 represents the downlink transmission and the last line 1202 represents the uplink transmission. Each block represents a subframe with a length of 1 millisecond. The UE sends a scheduling request (SR) at time 1210. At time 1212, the first uplink permission is received. At time 1214, the UE sets the buffer status report (BSR) value to X and sends this value. If the transmission is not decrypted correctly, the UE transmits BSR = X on the second transmission (ie, retransmission) at time 1216. When this retransmission is decrypted, at time 1218, a new value in the buffer status report is received. When the value X (for buffer status reporting) is set, enode B stops granting permissions in advance and terminates pending retransmissions before the LTE off period beginning at time 1220. Let me. In other words, the value of x is determined so that it can be retransmitted.
In one configuration, the buffer status report value can be used to temporarily stop receiving uplink permissions from e-node B. For example, if the UE notifies a value in the buffer status report and e-node B continues to send permissions, e-node B will be for a longer time than requested by the UE. , The permission to the UE can be extended. In a particular example, if the UE requested 10 ms permission, but enode B continues scheduling the UE for 12 ms permission, in one configuration the UE will report a buffer status report. The value can be set equal to zero. This tells e-node B that there is no more pending data on the UE side. This causes the UE to stop receiving the uplink permission from the e-node B. This is one example of adjusting the buffer status report (BSR) value to reflect the value that indicates to e-node B to stop sending permissions. In another configuration, normal transmission can be recovered by sending a scheduling request.
If the scheduler takes too long to service x bytes, BSR = may be used to start the off period. In addition, the on / off period can vary due to link errors. Moreover, in one configuration, the value of "x" is adapted for subsequent on periods. The UE may withhold scheduling requests and / or send buffer status reports until the next on-period.
In another configuration, the UE is aware of the particular function of the other technology (s) that it is transmitting, so the UE can determine the correct value for the buffer status report to use. For example, the UE is aware of the requirements of other technologies, such as the gap length of other technologies (s), and the current rate of LTE. More specifically, if the link is receiving at a particular rate and is informed of a certain number of bytes, the UE will tell how many times the UE is from the e-node and for how long. Can be determined whether to get the scheduling of. Based on this determination, the UE can determine the appropriate buffer status report to use.
For example, if the UE wants to stay for 10 ms and the UE gets 1 megabyte per second on the uplink, it can be calculated that the UE will get 10 KB / s for 10 ms. .. The UE will notify 10 KB / s and the e-node B will service the UE for 10 milliseconds. After that, e-node B will stop providing services to the UE. The UE will then remain silent on the uplink side for some period of time, and other technologies (eg Bluetooth) will transmit. The UE will send a scheduling request if Bluetooth has finished its activity or if the LTE link needs to come back online. At this point, the value of the buffer status report notified by the UE may depend on the current rate condition. The UE can continuously check its rate condition.
In another configuration, the value of the modified buffer status report can be determined by the performance of the interfering technology. For example, the error rate of the interfering technique (eg, Bluetooth) can be used as input so that the value of the modified buffer status report is adjusted by the loop. In particular, the buffer status report value can be reduced by a certain amount to create a gap. After adjusting the buffer status report, if the error rate is still high, the buffer status report value can be reduced again. In one embodiment, the error rate in the technique being interfered with can be used for short-term time division multiplexing techniques. Here, in LTE transmission, a particular gap amount is generated for use by Bluetooth technology. If LTE is operating in a low duty cycle by other users in the cell, the impact on Bluetooth / WLAN will be minimized and TDM will not be required. In this case, the false metric at sacrifice would not indicate a need for TDM.
In another configuration, the current data rate can be used as an input in long-term time division multiplexing technology. Here, the buffer status report value is adjusted to generate a predetermined length of LTE activity.
As shown in FIG. 13, the UE reduces the transmit buffer status value to generate a modified transmit buffer status value so that less uplink permissions are received, as shown in block 1310. I can let you. This is a transmission gap in the first radio access technology. The UE may communicate with a second radio access technique during the transmission gap, as shown in block 1312. In another aspect, the Channel Quality Index (CQI) is used to generate the downlink gap, as described in KADOUS U.S. Patent Application 13 / 229,819, filed September 12, 2011. The report can be modified. The disclosure of this US patent application is incorporated herein by reference in its entirety. CQI modifications can be used in combination with BSR regulation to generate both uplink and downlink gaps.
The UE may provide means for reducing the transmit buffer status value. In one embodiment, the aforementioned reducing means may be a processor 270 and memory 272 configured to perform the functions detailed by the aforementioned means. The UE may also be provided with means for communication. In one embodiment, the means for communicating described above are an antenna 252a-252r, a receiver / transmitter 254a-254r, a received data processor 260 configured to perform the functions detailed by the means described above. , Transmit data processor 238, processor 270, and / or memory 272. In another aspect, the aforementioned means may be a module or any device configured to perform the functions described by the aforementioned means.
The above-mentioned examples describe aspects that can be realized in LTE systems. However, the scope of this disclosure is not so limited. The various aspects are for use with other communication systems, such as those that apply any different communication protocol, including, but not limited to, CDMA systems, TDMA systems, FDMA systems, and OFDMA systems. Can be adapted.
It is understood that the specific order or hierarchy of the disclosed processing steps is an example of a typical approach. Based on the design choices, it is understood that the specific order or hierarchy of steps in these processes can be reconstructed while remaining within the scope of the present disclosure. Accompanied Method Claims are meant to present the elements of the various steps in sample order and are not limited to the specific order or hierarchy shown.
Those skilled in the art will appreciate that information and signals can be represented using any of a variety of different techniques and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced through the above description may be voltage, current, electromagnetic waves, magnetic or magnetic particles, optical fields or particles, or any of these. Can be expressed by a combination of.
Those skilled in the art will further appreciate the various exemplary logical blocks, modules, circuits, and algorithmic steps described in connection with the embodiments disclosed herein to electronic hardware, computer software, and the like. Or you will recognize that it is realized as a combination of both. To articulate the interstitial nature of hardware and software, various exemplary components, blocks, modules, circuits, and steps have been generally described in terms of these functions. Whether these functions are realized as hardware or software depends on the design constraints imposed on the specific application and the entire system. A person skilled in the art can realize the above-mentioned functions by a method that changes according to each specific application. However, this application decision should not be construed as causing a deviation from the scope of the invention.
The various exemplary logic blocks, modules, and circuits described in relation to the embodiments disclosed herein include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), and field programs. With programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, or any combination of the above designed to achieve the functions described above. Can be realized or implemented. The general purpose processor can be a microprocessor, but instead can be a conventional processor, controller, microcontroller, or state machine. The processor can be realized, for example, as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working with a DSP core, or any other combination of computing devices having such a configuration. Can be done.
The steps of methods and algorithms described in relation to the aspects disclosed herein are embodied directly by hardware, by software modules executed by a processor, or by a combination thereof. Software modules are RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or other types of storage media known in the art. Can exist in. A typical storage medium is connected to a processor, such as a processor, capable of reading information from the storage medium and writing information to the storage medium. Alternatively, the storage medium can be integrated into the processor. The processor and the storage medium may exist in the ASIC. The ASIC can be present in the user terminal. Alternatively, the processor and storage medium can exist as discrete components within the user terminal.
The above description of the disclosed embodiments applies to the manufacture or use of this disclosure by any person skilled in the art. Various variations to these aspects are readily apparent to those of skill in the art and the general principles defined herein can be applied to other aspects without departing from the spirit or scope of the present disclosure. .. As such, the disclosure is not limited to the embodiments presented herein, but is intended to correspond to the broadest scope consistent with the principles and novel features disclosed herein. There is. The inventions described in the claims of the original application of the present application are described below. [C1] A method for wireless communication to generate a modified transmit buffer status value so that fewer uplink permissions, which are transmission gaps in the first radio access technology, are received. A method comprising communication with the transmission gap using a second radio access technique. [C2] The method according to [C1], wherein the transmission buffer status is a buffer status report (BSR). [C3] Generating the modified transmit buffer status value is the method according to [C1], which is based on the traffic type of the second radio access technique. [C4] The method according to [C1], wherein generating the modified transmit buffer status value comprises setting the buffer status report value to zero. [C5] The method according to [C1], further comprising adjusting the modified transmit buffer status value based on the error rate of the second radio access technique. [C6] The method of [C1], further comprising adjusting the modified transmit buffer status value based on the current data rate of the first radio access technique. [C7] The method according to [C1], wherein a scheduling request is transmitted to reactivate the downlink activity and the uplink activity of the first radio access technique. [C8] The method according to [C1], wherein the scheduling request is held during the off period. [C9] To calculate the period required for transmission of the second radio access technology, and The method according to [C1], further comprising considering all pending retransmissions when transmitting the transmit buffer status. [C10] The first radio access technique comprises a long term evolution, and the second radio access technique comprises one of Bluetooth and WLAN, according to [C1]. Method. [C11] The method according to [C1], further comprising setting a channel quality index report value equal to zero to create a simultaneous gap between the uplink and the downlink. [C12] A device for wireless communication, comprising a memory and at least one processor connected to the memory, the at least one processor providing a transmission gap in the first radio access technique. A device configured to generate a modified transmit buffer status value so that link permissions are received less often and to communicate using a second radio access technique during the transmit gap. .. [C13] The device according to [C12], wherein the transmit buffer status is a buffer status report (BSR). [C14] The device according to [C12], wherein the processor is configured to generate the modified transmit buffer status value based on the traffic type of the second radio access technique. [C15] The device according to [C12], wherein the processor is configured to generate the modified transmit buffer status value by setting the buffer status report value to zero. [C16] The device according to [C12], wherein the processor is further configured to adjust the modified transmit buffer status value based on the error rate of the second radio access technique. [C17] The processor is further configured to adjust the modified transmit buffer status value based on the current data rate of the first radio access technique, according to [C12]. apparatus. [C18] The device according to [C12], wherein a scheduling request is transmitted to reactivate the downlink activity and the uplink activity of the first radio access technique. [C19] The device according to [C12], wherein the scheduling request is held during the off period. [C20] The processor is further configured to calculate the time required for transmission of the second radio access technology and to consider all pending retransmissions when transmitting the transmit buffer status. The device according to [C12]. [C21] The first radio access technique comprises a long term evolution, and the second radio access technique comprises one of Bluetooth and WLAN, according to [C12]. apparatus. [C22] The device according to [C12], wherein the processor is further configured to set a channel quality index report value equal to zero in order to create a simultaneous gap between the uplink and the downlink. [C23] A computer program product for wireless communication in a wireless network. A computer-readable medium with a recorded non-temporary program code is provided so that the program code receives fewer uplink permissions, which is a transmission gap in the first radio access technology. , A computer program comprising program code for generating a modified transmit buffer status value and program code for communicating using a second radio access technique between the transmit gaps. Product. [C24] A means for generating a modified transmit buffer status value that is a device for wireless communication so that fewer uplink permissions, which are transmission gaps in the first radio access technology, are received. A device comprising, and a means of communicating using a second radio access technique between the transmission gaps.
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Every citation, both ways
| Document | Relation | Office |
|---|---|---|
| WO2012021879A2 | Cites | World Intellectual Property Organization (WIPO) |
10 members in 7 offices
Priority claims11
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| 38499310 | United States of America | P | |
| 38499310 | United States of America | P | |
| 201113237185 | United States of America | A | |
| 201113237185 | United States of America | A | |
| 2011052458 | United States of America | W | |
| 2011052458 | United States of America | W | |
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| 61384993 | – | – | – |
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| US201113237185 | – | – | – |
| WO2011US52458 | – | – | – |
Members10
| Document | Office | Kind | |
|---|---|---|---|
| US2012071185A1 | United States of America | A1 | |
| WO2012040265A1 | World Intellectual Property Organization (WIPO) | A1 | |
| TW201218795A | Taiwan Province of China | A | |
| KR20130058067A | Republic of Korea | A | |
| CN103141145A | China | A | |
| EP2620030A1 | European Patent Office (EPO) | A1 | |
| JP2013539299A | Japan | A | |
| JP5620007B2This record | Japan | B2 | |
| US8886239B2 | United States of America | B2 | |
| KR101483564B1 | Republic of Korea | B1 |
18 legal events, as the office reported them to INPADOC
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Numbers
- Publication
- 5620007
- Publication, DOCDB
- 5620007
- Publication, EPODOC
- JP5620007B
- Application
- 2013530240
- Application, DOCDB
- 2013530240
- Application, EPODOC
- JP20130530240
Titles2
- Japanese
- 送信ギャップを生成するためのバッファ・ステータス・レポート制御
- English
- Buffer status report control to generate transmission gaps
Classification
- CPC, 7
- H04W72/1215
- H04W72/21
- H04W88/06
- H04W72/1221
- H04W72/12
- H04W28/0278
- H04W84/12
- IPC, 5
- H04W88 06
- H04J11 00
- H04W16 14
- H04W24 10
- H04W48 18
