Communicating over a wireless link using a superframe that has frames of different types
Abstract
This record has no abstract on file.
Term
Projected expiry 29 December 2028.
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- Granted
- Today
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17 claims: 4 independent, 13 dependent
- 1無線通信ノードにより実行される方法であって、 異なるタイプのパーティションを連結して構築したものを含むデータコンテナ構造により、データを、無線リンクを介して通信するステップを有し、前記データコンテナ構造における前記異なるタイプのパーティションは、異なる無線アクセス技術により情報を搬送し、 第1のパーティションにおいて、第1の無線アクセス技術により動作する第1のタイプの移動局用の第1のアップリンクデータと、異なる無線アクセス技術である第2の無線アクセス技術により動作する第2のタイプの移動局用の第2のアップリンクデータとを提供し、 第2のパーティションにおいて、前記第1のタイプの移動局に対する第3のアップリンクデータと、前記第2のタイプの移動局に対する第4のアップリンクデータとを提供するステップをさらに有し、 前記第1のアップリンクデータは、前記第1のパーティションにおいて、前記第2のアップリンクデータと時間分割多重され、 前記第3のアップリンクデータは、前記第2のパーティションにおいて、前記第2のアップリンクデータと周波数分割多重されている、方法。
- 2前記データコンテナ構造により、前記データを、無線リンクを介して通信するステップにおいて、時間分割多重データを有する第1パーティションと、周波数分割多重データを有する第2パーティションを含む前記データコンテナ構造により、前記データを通信する、請求項1記載の方法。
- 3前記データコンテナ構造により、前記データを、無線リンクを介して通信するステップにおいて、WiMAX無線アクセス技術による情報及びIEEE802.16m無線アクセス技術による情報を搬送するデータコンテナ構造により、前記データを通信する、請求項1記載の方法。
- 4前記無線通信ノードが基地局であり、前記データコンテナ構造により、前記データを、無線リンクを介して通信するステップにおいて、複数の異なる無線アクセス技術により処理を行う複数のタイプの移動局に関するデータを通信する、請求項1記載の方法。
- 5前記データコンテナ構造により、前記データを、無線リンクを介して通信するステップにおいて、前記移動局のアップリンク及びダウンリンクのデータを通信し、前記アップリンク及び前記ダウンリンクのデータが、前記データコンテナ構造において他の移動局のデータと多重されている、請求項1記載の方法。
- 6異なるタイプの移動局に対する時間分割多重されたダウンリンクデータを含む第3のパーティションを設けるステップをさらに有する、請求項1記載の方法。
- 7前記第1のタイプの移動局は少なくとも1つのWiMAX方式の移動局を含み、前記第2のタイプの移動局は少なくとも1つのIEEE802.16m方式の移動局を含む、請求項1記載の方法。
- 8前記データコンテナ構造により、前記データを、無線リンクを介して通信するステップにおいて、等しい長さのサブフレームを含む第1のパーティションと、異なる長さのサブフレームを含む第2のパーティションとを有する前記データコンテナ構造において、前記データを通信する、請求項1記載の方法。
- 9無線リンクに対するインターフェースと、プロセッサとを有する無線通信ノードであって、前記プロセッサにより、無線リンクを介してフレームを搬送するスーパーフレームに含まれたデータを通信し、前記スーパーフレームは、異なる無線アクセス技術による情報を搬送するために、異なるタイプのフレームが連結されたものを含み、 前記異なるタイプのフレームが、等しい長さのサブフレームを含む第1のフレームと、異なる長さのサブフレームを含む第2のフレームとを有し、 前記第1のフレームは、第1の無線アクセス技術によるヘッダ同士の間で規定される時間の長さを有し、前記第1のフレームは、異なる無線アクセス技術である第2の無線アクセス技術による単独のヘッダを含み、 前記第2のフレームは、第1の無線アクセス技術によるヘッダ同士の間で規定される時間の長さを有し、前記第2のフレームは、前記第2の無線アクセス技術による複数のヘッダを含む、無線通信ノード。
- 10前記スーパーフレームは、前記異なるタイプ各々の設定したフレーム数を指定するヘッダを有する、請求項9記載の無線通信ノード。
- 11前記スーパーフレームのヘッダが、(1)時間分割多重又は周波数分割多重されたサブフレームが使用されているか否か、(2)第2の無線アクセス技術によるデータ量に対する、第1の無線アクセス技術によるデータ量の比率、及び(3)フレーム毎のダウンリンク/アップリンクの切り替え数の内の1つ以上を指定している、請求項9記載の無線通信ノード。
- 12前記異なるタイプのフレームが、時間分割多重されたデータを有する第1のフレームと、周波数分割多重されたデータを有する第2のフレームとを含む、請求項9記載の無線通信ノード。
- 13前記第1のフレームにおける前記時間分割多重データは、時間分割多重されたアップリンクデータを含み、前記第2のフレームにおける前記周波数分割多重データは、周波数分割多重されたアップリンクデータを含み、前記第1及び第2のフレーム各々は、時間分割多重されたダウンリンクデータを含む、請求項12記載の無線通信ノード。
- 14前記第2の無線アクセス技術によるフレーム構造は、前記第2の無線アクセス技術による複数のヘッダのペアの間で規定される、請求項9記載の無線通信ノード。
- 15当該無線通信ノードが、基地局又は移動局を含む、請求項9記載の無線通信ノード。
- 16無線通信ノードに手順を実行させる命令を含む読取可能な記憶媒体であって、該手順は、 異なるタイプのパーティションを連結して構築したものを含むデータコンテナ構造により、データを、無線リンクを介して通信するステップを有し、前記データコンテナ構造における前記異なるタイプのパーティションは、異なる無線アクセス技術により情報を搬送し、 第1のパーティションにおいて、第1の無線アクセス技術により動作する第1のタイプの移動局用の第1のアップリンクデータと、異なる無線アクセス技術である第2の無線アクセス技術により動作する第2のタイプの移動局用の第2のアップリンクデータとを提供し、 第2のパーティションにおいて、前記第1のタイプの移動局に対する第3のアップリンクデータと、前記第2のタイプの移動局に対する第4のアップリンクデータとを提供するステップをさらに有し、 前記第1のアップリンクデータは、前記第1のパーティションにおいて、前記第2のアップリンクデータと時間分割多重され、 前記第3のアップリンクデータは、前記第2のパーティションにおいて、前記第2のアップリンクデータと周波数分割多重されている、 記憶媒体 。
- 17前記異なる無線アクセス技術は、WiMAX技術及びIEEE802.16m技術を含む、請求項16記載の 記憶媒体 。
Independent claims17
23 paragraphs, as filed
The present invention generally relates to communicating in a data container structure containing different types of partitions in a given session on a wireless link.
Various wireless access technologies have been proposed and implemented to enable mobile stations to communicate with other mobile stations or to allow mobile stations to communicate with wired terminals coupled to wired networks. Specific examples of wireless access technology are specified by 3GPP2, a technology such as GSM (Global System for Mobile Communication) or UMTS (Universal Mobile Communication System) specified by the 3rd Generation Partnership Project (3GPP). Includes CDMA2000 (Code Division Multiple Access 2000) technology, or other wireless access technology.
Another type of wireless access technology is WiMAX (Worldwide Interoperability for Microwave Access) technology. WiMAX is based on the IEEE (Institute of Electrical and Electronics Engineers) 802.11 standard specifications. WiMAX wireless access technology is designed to provide wireless broadband access.
To support even faster data rates, the IEEE is developing a new wireless standard specification known as IEEE 802.11m. 802.16m is expected to support wireless data rates as high as 1 gigabit per second (Gbps). The ability to achieve such high data rates is based on the use of multi-input, multi-output (MIMO) technology. In MIMO, by using a plurality of antennas on the transmitting side and the receiving side, data can be transmitted from a plurality of transmitting antennas of the transmitter via a plurality of paths and can be received by the antennas of the receiver.
<p> When developing new wireless access technologies such as IEEE802.16m, wireless access technologies must address the problem of coexistence of legacy mobile stations and mobile stations that support the new wireless access technologies. For example, in the case of a WiMAX radio access network, when 802.11m is realized, the WiMAX radio access network is a combination of a conventional WiMAX mobile station (for example, a mobile station that supports access by IEEE802.16e) and an 802.11m mobile station. Need to support communicating with both parties. When both conventional mobile stations and 802.16m mobile stations coexist, the base stations that support wireless access for such mobile stations are both uplinks and downlinks that are exchanged between the various mobile stations and base stations. Data needs to be processed.</p><p> However, in the conventional technology, neither a proposal nor a regulation has been made for an efficient mechanism capable of efficiently communicating with a conventional WiMAX mobile station and an 802.11m mobile station.</p>
<p> The method according to one embodiment of the present invention A method performed by a wireless communication node, The data container structure, including those constructed by concatenating different types of partitions, has a step of communicating data via a wireless link, and the different types of partitions in the data container structure are provided by different wireless access technologies. A method of transporting information.</p>
<figref num="1">A block diagram of a communication network according to a preferred embodiment of the present invention, including a radio access network that supports different types of mobile stations.</figref><figref num="2">The figure which shows the frame of the type 1 by a preferred embodiment.</figref><figref num="3">The figure which shows the frame of the type 2 by a preferred embodiment.</figref><figref num="4">The figure which shows the super frame by a preferred embodiment which includes the connection of the type 1 frame and the type 2 frame.</figref><figref num="5">The figure which shows the frame of the type 1 by another preferred embodiment.</figref><figref num="6">The figure which shows the frame of the type 2 by another preferred embodiment.</figref><figref num="7">The figure which shows the super frame by another preferable embodiment.</figref><figref num="8">The figure which shows the super frame by another preferable embodiment.</figref><figref num="9">The figure which shows the super frame by another preferable embodiment.</figref>
In general, according to one embodiment, one data container structure is communicated over a wireless link to improve communication efficiency with different types of mobile stations, and the data container structure is a different type of movement. Includes concatenated partitions of different types that can be configured to carry station data.
Other or alternative features will become apparent from the description, drawings and claims below.
In the following description, various specific details will be given to facilitate understanding of some embodiments. However, those skilled in the art will appreciate that some embodiments may be realized without such specific details and that various modifications and modifications to the described embodiments are possible. Will be done.
In general, preferred embodiments provide techniques or mechanisms for wirelessly communicating data about different types of mobile stations, the data being flexible hybrid data container structure (flexible) containing configurable concatenation of different types of partitions. It is carried by hybrid data container structure). The data container structure in one embodiment is referred to as a "superframe", where "superframe" is any plurality of partitions of data (partitions (partitions, delimiters) are also referred to as "frames"). It is a data structure. To ensure a description, for flexible hybrid superframes that include configurable concatenations of frames of different types-this is the same or similar technology, but other types of flexible hybrid data. Note that it is applicable to container structures and partitions.
Various types of frames in superframes can be used to carry uplink data (from mobile station to base station) and downlink data (from base station to mobile station), as well as control information. It can also be used for transportation. Uplink / downlink data and control information may be collectively referred to as "information". Uplink or downlink "data" refers to bearer traffic such as voice packets or packet data.
Different types of mobile stations relate to mobile stations operating according to different wireless access technologies. As a specific example, the wireless access technology is WiMAX (a world standard communication method using microwaves) defined by the IEEE (Institute of Electrical and Electronics Engineers) 802.11 standard specification, which is the IEEE 802.11e standard specification. including. Another wireless access technology is 802.16m technology.
The different types of frames contained in the hybrid superframe may have different structures. For example, the superframe may include at least one first frame of the first type having a first structure and at least one second frame of a second type having a second structure having a different structure. The number of first frames and the number of second frames are configurable, providing flexibility.
In a preferred embodiment, the hybrid superframe comprises at least one first frame of the first type containing time division multiplexing data and a second type second frame containing frequency division multiplexing data. Each of the frames can carry data from different types of mobile stations, such as WiMAX mobile stations and 802.11m mobile stations. Although specific standard specifications are shown for convenience of description, it should be noted that the embodiments of the present invention are also applicable to wireless access techniques according to other standard specifications.
"Time division multiplexing" data refers to data having multiple parts that are communicated (multiplexed) in multiple time slots. As a specific example of time division multiplexing data, the first data part is communicated in the first time slot of a given carrier and the second data part is communicated in the second time slot of the same carrier.
"Frequency division multiplexing" data refers to data having multiple parts that are communicated on different carriers at different frequencies. For example, the first data portion is communicated on the first carrier on the first frequency and the second data portion is communicated on the second carrier on the second frequency. In the case of WiMAX, "frequency division multiplexing data" refers to data having a plurality of parts communicated by various subcarriers at various frequencies. "Carrier" and "subcarrier" are used interchangeably (synonymously).
In one embodiment, the different types of frames concatenated in the superframe are frames that utilize different multiplexing methods (eg, the first frame contains time division multiplexing data and the second frame contains frequency division multiplexing data. Includes time division multiplexing data.).
In another preferred embodiment, the frames connected by the hybrid superframe are a single downlink subframe (uplink control and downlink control and a subframe for communicating downlink information including data) and a single downlink subframe. At least one first frame (type 1) with uplink subframes (subframes for communicating uplink information) and at least one second with flexible and variable number of uplink and downlink subframes. Includes frame (type 2) and.
Type 2 frames can include subframes of uneven length to allow flexibility in the number of uplink and downlink subframes that can be included in the frame. For example, one frame can include one or more uplink subframes and one or more downlink subframes. The first frame may include a different number of uplink subframes and / or downlink subframes than the second frame. The length of the subframes (uplink and / or downlink) is variable so that more than one uplink subframe and / or more than one downlink subframe fits into one frame. This flexibility in defining multiple subframes within a frame allows for superior wireless communication system performance with shorter latency and higher throughput characteristics.
In a preferred embodiment, the ability to include different types of frames within a hybrid superframe is more in a radio access network where various types of mobile stations must be supported, including conventional mobile stations and new technology mobile stations. Enables flexible and efficient data communication. A "Legacy" mobile station is a mobile station that operates according to older (or newer) wireless access technology, and a "new technology mobile station" is one that operates according to recent (or newer) wireless access technology. It is a mobile station. In one embodiment, the conventional mobile station is a mobile station operating according to WiMAX wireless access technology (eg, as specified by IEEE802.16e), and the new technology mobile station is to IEEE802.16m wireless access technology. Therefore, it is a mobile station that operates. More generally, the present embodiment can be used for different types of mobile stations that support different types of wireless access technologies, as well as conventional and new technology mobile stations.
For convenience of explanation, conventional or WiMAX mobile stations and 802.11m mobile stations are used. However, the same technique according to the preferred embodiment can be used with mobile stations operating according to other wireless access techniques.
<p> FIG. 1 shows a communication network including a radio access network 100 having a base station 104 for coverage area 102. The radio access network 100 includes a plurality of base stations, each of which is associated with a coverage area.</p><p> The base station 104 can communicate with the mobile stations 106A and 106B within the coverage area 102 of the base station 104. Base station 104 can support communication with both conventional mobile stations such as conventional mobile station 106A and 802.16m mobile station 106B.</p><p> The base station 104 has a base transceiver station (BTS) and communicates with a mobile station in the coverage area 102 by radio frequency (RF). The base station 104 may also include a base station controller or wireless network controller that controls tasks related to the base station.</p><p> As shown in FIG. 1, base station 104 is connected to system controller 108. If the radio access network 100 is a WiMAX access network as specified by the IEEE 802.16 standard specification, the system controller 108 can be an access service network (ASN) gateway. Further, the system controller 108 is connected to the gateway node 110, which connects the radio access network 100 to an external network 112 such as the Internet. For WiMAX, gateway node 110 is referred to as the Connection Services Network (CSN) node.</p><p> As shown in FIG. 1, base station 104 may include software 120 that can be run on one or more central processing units (CPUs) 122 connected to storage 124. The base station 104 has an air interface 126 for wireless communication with the mobile station and a network interface 128 for communicating with the system controller 108.</p><p> The software 120 shown in FIG. 1 represents various software modules provided in the base station 104, and the software modules include software modules in the data plane and the control plane in the base station 104. In particular, a task that can be performed by software 120 of base station 104 is to communicate data in superframes according to preferred embodiments. Software 120 may include a scheduler that schedules (schedules) the communication of data about various mobile stations. Each of the mobile stations 106A or 106B may likewise include software that can be run on a CPU connected to the storage.</p><p> Figure 2 shows a Type 1 frame 200 (200A and 200B are illustrated). Each of the frames 200 includes a downlink subframe (carrying downlink information from the base station to the mobile station) and an uplink subframe (carrying uplink information from the mobile station to the base station). The frame duration (frame length) of each frame begins with the start of the conventional preamble (legacy preamble) in the frame and ends with the start of the legacy preamble in the next frame. For example, in the case of FIG. 2, the frame duration of frame 200A begins with the start of the legacy preamble 202 contained in frame 200A and ends with the start of the next legacy preamble 202 contained in the next frame 200B. Each of the frames 200A and 200B may be referred to as legacy frames (because they are defined among traditional preambles).</p><p> Generally, a legacy preamble is provided on a downlink by a base station and includes control information that allows the mobile station to capture radio signals and synchronize the mobile station with the base station. The preamble contains information indicating the modulation scheme, transmission rate, and length of time to transmit the entire frame. In addition, legacy preambles can include frame control headers and downlink / uplink MAP information, which is the resources, modulation schemes and encodings used for downlink and uplink communications. It defines the methods, which are included in the scheduling grant information. The legacy preamble is, in one embodiment, the preamble specified in IEEE 802.11e.</p><p> The Legacy Preamble 202 for Frame 200A is included in the downlink subframe for Frame 200A. The downlink subframe of frame 200A contains the following information: Segment 204 for carrying traditional (legacy) downlink data (downlink data for traditional mobile stations) transmitted from the base station to the mobile station, The 802.16m preamble 206, which is the preamble specified by IEEE802.16m, and the segment 208, which contains both conventional and 802.11m downlink data.</p><p> The 802.16m preamble 206 contains downlink map (DL-MAP) information, which specifies the resources used to communicate downlink data from the base station to the mobile station. DL-MAP information provides information about the start time for a base station to send downlink data to a particular mobile station. The 802.16m preamble 206 may include preamble sequences and / or synchronization channels to support 802.16m mobile stations.</p><p> As shown in Figure 2, the 16m frame is defined between two consecutive 16m preambles, and as shown in Figure 2, the 16m frame has an offset with respect to the legacy frames 200A, 200B. Is (shifted).</p><p> The resources to which the downlink legacy data and 802.16m data of the downlink subframe segment 208 are transmitted can be specified by the scheduler of the base station. The allocated resources used to transmit downlink legacy and 802.16m data to the mobile station are specified in the DL-MAP information given to the mobile station by the 802.16m preamble 206.</p><p> A gap 210 is provided following the downlink subframe, which represents the switching time between downlink data communication and uplink data communication. Following the gap 210, an uplink subframe 212 containing uplink data for both legacy and 802.16m mobile stations is communicated. Again, the resources by which the mobile station can transmit the uplink data for the uplink subframe 212 are determined by the base station scheduler. Following the uplink subframe, another gap 214 is provided to switch between the uplink transmission and the downlink transmission in the next frame 200B.</p><p> As shown in FIG. 2, each type 1 frame 200 has one downlink subframe and one uplink subframe.</p><p> Figure 3 shows a Type 2 frame 300 (shown as 300A and 300B). In each frame 300, there may be more than one downlink subframe and / or more than one uplink subframe. That is, the downlink and uplink subframes have a variable length (300A) so that they are flexible with respect to the number of downlink and uplink subframes contained within the legacy frame, as shown in FIG. Or 300B). The legacy frame 300A has two switching points (switching between uplink and downlink transmission), and the legacy frame 300B has four switching points.</p><p> Frame 300A contains a first downlink subframe containing segments 308, 310, 304 and 312 (segment 308 is a legacy preamble, segment 310 carries legacy downlink data and segment 304 carries an 802.16m preamble. , Segment 312 carries both legacy and 802.16m downlink data). After the gap 314 (corresponding to the downlink-uplink switching point), an uplink subframe 316 at frame 300A is provided, which carries both legacy and 802.16m uplink data. Following another gap 318 (corresponding to the uplink-downlink switching point), a second downlink subframe is provided, the second downlink subframe is the 802.11m preamble 306 and segment 320 (802.16). m Includes downlink data).</p><p> As mentioned above, the three subframes in frame 300A have different lengths.</p><p> The frame duration of each of the legacy frames 300 is the same as that of each of the legacy frames 200 of FIG. That is, the frame duration of each Legacy Frame 300 is defined between the start of one legacy preamble and the start of the next Legacy preamble. However, in addition to this legacy frame structure (which has a frame duration specified by the legacy preamble), each of the legacy frames 300 also includes an 802.16m frame 302A (Figure 3), which is shorter than the legacy frame.</p><p> The shorter duration of the 802.16m frame 304A is specified between the start of the 802.16m preamble 304 and the start of the next 802.16m preamble 306. It should be noted that both the 802.16m preambles 304 and 306 are located in the same frame 300A. The second frame 300B shown in FIG. 3 also includes two 802.16m preambles 332 and 336, which define their own 802.16m frame. Also, as shown in Figure 3, two consecutive 802.16m frames 302A and 302B are provided within the duration of one legacy frame. However, the two consecutive 802.16m frames 302A and 302B have offsets for each of the legacy frames. The 802.16m frame 302B is specified between the 16m preambles 306 and 332.</p><p> The second frame 300B consists of a first downlink subframe 322 containing the legacy preamble 322, a first uplink subframe 326 containing 802.11m uplink data, and a second downlink subframe (legacy downlink). Includes data segment 330, 802.11m preamble 332, and segment 334 that carries legacy and 802.11m downlink data) and a second uplink subframe 338 that contains legacy and 802.11m uplink data. , Includes a third downlink subframe containing the 802.11m preamble 336 and the 802.11m downlink data segment 340.</p><p> Gaps 324, 328, 342 and 344 are provided between each pair of uplink and downlink subframes to switch between uplink and downlink communication.</p><p> According to one embodiment, as shown in FIG. 4, the hybrid superframe 350 includes a type 1 frame 200 and a type 2 frame 300 connected as intended. Specifically, the super frame 350 can include X type 1 frames 200 (X 1) and Y type 2 frames 300 (Y 1). More generally, the superframe 350 can include X type 1 frames 200 (X 0) and type 2 frames 300 Y (Y 0). The X and Y values can be set based on the number of legacy and 802.16m mobile stations in a particular coverage area served by the base station. The flexibility of connecting different types of frames into a single superframe can provide greater flexibility and more efficiently support both legacy and 802.16m wireless communications by base stations.</p><p> In Figures 2 and 3, it is assumed that the base station has one base station transceiver (BTS) that supports both legacy and 802.16m communications. In another embodiment, the base station may include a first dedicated transceiver that supports legacy communications and a second transceiver that supports 802.16m communications. Figures 5 and 6 show Type 1 and Type 2 frames when the base station includes separate dedicated transceivers (multiple transceivers) for legacy and 802.16m wireless communications. As shown in FIG. 5, the type 1 frame 400 includes a first frame 400A and a second frame 400B. The structure of each frame 400 is the same as that of the frame 200 shown in FIG.</p><p> However, the frame structure (shown as 500A and 500B in FIG. 6) is different from the frame structure 300 shown in FIG. Similar to frame 300 in FIG. 3, each frame 500 in FIG. 6 may include more than one downlink subframe and more than one uplink subframe. In addition, each frame 500 contains two 802.16m preambles, and the two 802.16m preambles have an 802.16m frame structure (in Figure 6) that is shorter than the legacy frame structure 500 (similar to the structure shown in Figure 3). (Represented as 502) is specified.</p><p> The difference between frame 500 in FIG. 6 and frame 300 in FIG. 3 is that under certain conditions, each frame 500 switches between uplink and downlink transmissions of different technologies (eg, legacy and 802.11m are different). In addition, no switching gap is required. One specific example of this occurring is between segment 504 containing legacy uplink data and subsequent downlink 802.16m preamble 506. Generally, if the same transceiver was used for both legacy and 802.16m communications, a gap would be required between segments 504 and 506. However, since a dedicated transceiver is provided in the base station for each of the legacy and 802.16m communications, the legacy transceiver can be used to transmit legacy uplink data in segment 504, and the 802.16m transceiver is legacy. It can be used to send an 802.16m preamble 506 immediately after the uplink data segment 504. By avoiding switching gaps under given conditions, more information can be transmitted within the same frame 500, further increasing bandwidth utilization efficiency.</p><p> Another embodiment that does not require a switching gap occurs in the communication between the 802.16m uplink data segment 508 and the legacy downlink data segment 510 in frame 500B.</p><p> The hybrid superframe can include a concatenation of X type 1 frames 400 and type 2 Y frames 500 (the number can be set intentionally).</p><p> In a preferred alternative embodiment, the superframe can include concatenation of other types of frames, eg, in some frames, legacy data and 802.11m data are transmitted in a time division multiplexing (TDM) fashion and are separate. In this frame, legacy data and 802.11m data are transmitted in frequency division multiplexing (FDM).</p><p> For example, as shown in FIG. 7, the first frame 600 may include a downlink subframe 616 and an uplink subframe 604. In uplink subframe 604, legacy and 802.16m uplink data is divided into different TDM subpartitions 608 and 610, respectively. The TDM subpartition 608 contains a time slot that carries only legacy uplink data, and the TDM subpartition 610 contains a time slot that carries only 802.16m uplink data. The legacy data and 802.16m data in the downlink subframe 616 of the first frame 600 are provided in separate TDM subpartitions 620, 622. Alternatively, instead of providing the legacy data and 802.16m data by separate TDM subpartitions, the legacy data and 802.16m data may be mixed and communicated on a scheduling basis.</p><p> In second frame 602, downlink subframe 624 contains legacy data and 802.16m data in separate TDM subpartitions 628, 630. However, the uplink subframe 606 in the second frame 602 contains different FDM subpartitions 612, 614 that carry the legacy and 802.16m uplink data, respectively. The uplink FDM612 contains a subcarrier group that carries the legacy uplink data, and the uplink FDM subpartition 614 contains another subcarrier group that carries the 802.16m uplink data.</p><p> The first frame 600 includes the TDM downlink subframe 616 and the TDM uplink subframe 604, and the second frame 602 includes the TDM downlink subframe 624 and the FDM uplink subframe 606.</p><p> In an alternative embodiment, any of the downlink subframes 616 and 624 can be configured to carry FDM data.</p><p> Further, the connected frames 600 and 602 constitute a hybrid super frame. The superframe has a superframe preamble 618 provided at the start of the downlink subframe of the first frame 600. The preamble 618 includes a superframe header in addition to the legacy preamble. The superframe header is communicated via the broadcast control channel (BCCH) and can specify, for example, whether uplink TDM and uplink FDM subframes are used. Also, for each downlink or uplink subframe, the superframe specifies the ratio of legacy to 16m, and by specifying the amount of each subframe, specifies the allocation of legacy data to 802.16m data. In addition, the superframe header can also specify the number of downlink / uplink switching points per frame. Typically, the number of switching points between the uplink data and the downlink data is 2, but in other embodiments, a larger number may be supported.</p><p> The superframes shown in FIG. 7 include Type 1 frames 600 and 602. On the other hand, the super frame shown in FIG. 8 includes a frame in which both a type 1 frame and a type 2 frame are combined. In FIG. 8, the frame 700 is a type 1 frame, while the frames 702A and 702B are type 2 frames, respectively. In each frame 702 (702A or 702B), shorter subframes, such as the uplink subframe 704, can be specified (uplink subframe 704 has a shorter duration than the downlink subframe 706). , Has the same length as each subframe in the Type 1 frame 700). In each Type 2 frame 702, the uplink subframe can be an uplink TDM subframe or an uplink FDM subframe.</p><p> The superframes shown in Figures 7 and 8 assume that the same base station is used to support both legacy and 802.16m communications. Figure 9 shows how different base stations are used to support legacy and 802.16m communications. In FIG. 9, the type 1 frame 800 has the same structure as the type 1 frame 700 of FIG. The Type 2 frame 802A has the same structure as the Type 2 frame 702A of FIG. However, in the type 2 frame 802B of FIG. 9, the switching gap can be omitted when switching between the communication of the 802.11m uplink data segment 804 and the communication of the legacy downlink data segment 806, which is shown in the figure. This is the same as the case of omitting the switching gap in frames 500A and 500B of 6.</p><p> The flexible hybrid superframe described above enables an efficient way to include everything from traditional wireless access communications to the latest wireless access communications. If the number of conventional mobile stations in a wireless network changes depending on the deployment state, the configuration of this frame structure can be changed relatively easily to accommodate such a changing number of conventional mobile stations. is there. System performance can also be optimized by using uplink TDM or uplink FDM subframes. It also provides the flexibility to determine the number of switchings between uplink and downlink communications. For example, the retransmission delay (the delay between the transmission of the original data and the retransmission of the data due to the negative response) can be shortened by maximizing the number of downlink / uplink switching points. By reducing the delay time, the quality of service can be improved.</p><p> The tasks related to data communication by superframe in the preferred embodiment can be controlled by software. Such software instructions are executed by the processor (eg, CPU 122 in Figure 1). Processors include microprocessors, microcontrollers, processor modules or subsystems (including one or more microprocessors or microcontrollers), and other control or arithmetic units. "Processor" is a concept that includes a single block or multiple elements.</p><p> Instructions and data (of software) are stored in their own storage, and storage is implemented as a medium that can be read or used by one or more computers. Storage media include semiconductor memories (dynamic or static random access memory (DRAM or SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, etc.), Various types of memory, including magnetic disks (fixed disks, floppy disks, removable disks, etc.), other magnetic media including tapes, and optical media (compact disks (CDs) or digital video disks (DVDs), etc.) including.</p><p> As described above, various specific details have been explained in order to promote the understanding of the present invention. However, it will be appreciated by those skilled in the art that the present invention may be realized without such specific details. Although the present invention has been described with a limited number of examples, those skilled in the art will appreciate a wide variety of modifications and variations to them. The claims are intended to include such modifications and modifications as being within the spirit and scope of the invention.</p>
Every citation, both ways
| Document | Relation | Office |
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| US20070121531A1 | Cites | United States of America |
12 members in 6 offices
Priority claims14
| Document | Office | Kind | Date |
|---|---|---|---|
| 2248108 | United States of America | P | |
| 2248108 | United States of America | P | |
| 61022481 | United States of America | – | |
| 3711408 | United States of America | P | |
| 3711408 | United States of America | P | |
| 61037114 | United States of America | – | |
| 2008088393 | United States of America | W | |
| 2008088393 | United States of America | W | |
| 2008022481 | – | – | – |
| 2008037114 | – | – | – |
| 2008088393 | – | – | – |
| US20080022481P | – | – | – |
| US20080037114P | – | – | – |
| WO2008US88393 | – | – | – |
Members12
| Document | Office | Kind | |
|---|---|---|---|
| WO2009094093A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2009094093A3 | World Intellectual Property Organization (WIPO) | A3 | |
| EP2238726A2 | European Patent Office (EPO) | A2 | |
| KR20100130597A | Republic of Korea | A | |
| CN101926145A | China | A | |
| US2011026461A1 | United States of America | A1 | |
| JP2011512713A | Japan | A | |
| EP2238726A4 | European Patent Office (EPO) | A4 | |
| CN101926145B | China | B | |
| JP5425809B2This record | Japan | B2 | |
| EP2238726B1 | European Patent Office (EPO) | B1 | |
| KR101504387B1 | Republic of Korea | B1 |
19 legal events, as the office reported them to INPADOC
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Numbers
- Publication
- 5425809
- Publication, DOCDB
- 5425809
- Publication, EPODOC
- JP5425809B
- Application
- 2010543114
- Application, DOCDB
- 2010543114
- Application, EPODOC
- JP20100543114
Titles2
- Japanese
- 無線通信ノード、無線通信ノードにおける方法及び製品
- English
- Wireless communication node, method and product in wireless communication node
Classification
- CPC, 3
- H04W72/044
- H04L5/0007
- H04W84/02
- IPC, 3
- H04W36 14
- H04W88 10
- H04W84 12