WO2009155795A1 - 一种时频资源复用的方法 - Google Patents

一种时频资源复用的方法 Download PDF

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Publication number
WO2009155795A1
WO2009155795A1 PCT/CN2009/070475 CN2009070475W WO2009155795A1 WO 2009155795 A1 WO2009155795 A1 WO 2009155795A1 CN 2009070475 W CN2009070475 W CN 2009070475W WO 2009155795 A1 WO2009155795 A1 WO 2009155795A1
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Prior art keywords
relay
time
zone
data
frequency resource
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PCT/CN2009/070475
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English (en)
French (fr)
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毕峰
苟伟
韩小江
袁明
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中兴通讯股份有限公司
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Publication of WO2009155795A1 publication Critical patent/WO2009155795A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to a method for time-frequency resource multiplexing, and more particularly to a method for time-frequency resource multiplexing in an OFDM (Orthogonal Frequency Division Multiplexing) system.
  • OFDM Orthogonal Frequency Division Multiplexing
  • B3G/4G The research goal of B3G/4G is to integrate access systems such as cellular, fixed wireless access, nomadic, wireless regional networks, and all-IP networks to provide users with peak transmission rates of up to 100 Mbps and 1 Gbps in high-speed and low-speed mobile environments. Capabilities, and the seamless integration of cellular systems, regional wireless networks, broadcast, and television satellite communications, enables "anyone can communicate with anyone else in any way, anytime, anywhere.”
  • Relay technology can be applied as an effective measure. Relay technology can increase cell coverage and increase cell capacity. After the introduction of the Relay technology, more problems will arise, such as the use of time-frequency resources is an issue that needs to be studied in depth.
  • Time-frequency resource management is very important for OFDM communication systems, especially for networks that introduce RS (Relay Station Relay).
  • RS Relay Station Relay
  • the data to be transmitted to the UT is generally sent to the RS by the BS (Base Station) in the Relay zone.
  • the UT is often stopped. Or the UT does not receive data, and then the RS sends it to the UT in the Access zone.
  • the two-hop system occupies twice as much time-frequency resources as the system without the RS, which results in time-frequency resource utilization. Decline.
  • the technical problem to be solved by the present invention is to provide a method for time-frequency resource multiplexing, which solves the problem of reducing the utilization rate of time-frequency resources after the introduction of the relay.
  • the present invention provides a method for time-frequency resource multiplexing, including: a base station or a relay station multiplexing time-frequency resources in a relay zone Relay zone to one or more lower-level relay stations and/or one or more User terminals send data; or,
  • the base station or relay station multiplexes one time zone resource within the access zone to send data to one or more lower level relay stations and/or one or more user terminals. Further, the base station or the relay station transmits data to its lower relay station through the relay zone; the base station or the relay station sends data to the user terminal under its jurisdiction through the Access zone.
  • the base station or the relay station determines to multiplex the time-frequency resources of the Relay zone, and selects multiplexing.
  • the method completes data transmission to its subordinate relay station and/or user terminal;
  • the base station or the relay station determines to multiplex the time-frequency resources of the Access zone, and selects the multiplexing mode to other The lower relay station and/or the user terminal complete the data transmission.
  • the base station or the relay station sends data to one of the lower relay stations through the time-frequency resource on the relay zone
  • the time-frequency resource on the relay zone is multiplexed to send data to the other one or more lower-level relay stations.
  • the base station or the relay station transmits data to a user terminal under its jurisdiction through the time-frequency resource on the Access zone
  • the time-frequency resource on the Access zone is multiplexed to send data to one or more other user terminals.
  • the base station or the relay station when the base station or the relay station sends data to the lower-level relay station through the time-frequency resource on the relay zone, the time-frequency resource on the relay zone is multiplexed in the Access zone, and sent to one or more user terminals under its jurisdiction. data. Further, when the base station or the relay station sends data to the user terminal under its jurisdiction through the time-frequency resource on the Access zone, the time-frequency resource on the Access zone is multiplexed in the Relay zone, and sent to one or more of the lower-level relay stations. data.
  • time-frequency resource multiplexing is implemented by multi-codeword space division multiplexing, single codeword space division multiplexing or code division multiplexing.
  • data packets are first grouped, and each group of data is transmitted to a relay station or a user terminal occupying the same time-frequency resource by using space division multiplexing to transmit corresponding data, each group
  • the inner data uses code division multiplexing to transmit corresponding data to a relay station or user terminal occupying the same time-frequency resource.
  • the corresponding data is transmitted to the relay station or the user terminal occupying the same time-frequency resource by using different spatial regions.
  • the corresponding data is transmitted to the relay station or the user terminal occupying the same time-frequency resource by using different code resources.
  • the present invention solves the problem of the utilization of the time-frequency resource caused by the introduction of the relay in the system, and ensures the coverage of the relay station, and the time-frequency resource, by rationally dividing and utilizing the spatial characteristics.
  • the multiplexing is simple to implement and avoids interference while multiplexing.
  • FIG. 1 is a schematic diagram of time-frequency resource multiplexing in a zone according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of time-frequency resource multiplexing between zones according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of execution of time-frequency resource multiplexing according to an embodiment of the present invention.
  • time-frequency resource multiplexing for the time-frequency resource multiplexing in the Relay zone, if the BS or the RS transmits data to a subordinate RS in its jurisdiction through the time-frequency resource on the Relay zone, Sending data to other RSs within the BS or RS jurisdiction, and the BS or RS multiplexes time-frequency resources on the Relay zone to send data to the RSs;
  • the BS or the RS For time-frequency resource multiplexing in the Access zone, the BS or the RS sends data to a UT within its jurisdiction through the time-frequency resources on the Access zone, and also needs to send data to other UTs within the BS or RS jurisdiction. And the BS or the RS multiplexes time-frequency resources on the Access zone to send data to the UTs;
  • the BS or the RS For the time-frequency resource multiplexing between the Relay zone and the Access zone, the BS or the RS sends data to a subordinate RS in its jurisdiction through the time-frequency resource on the Relay zone, and the BS or the RS also needs to be within its jurisdiction. If one or more UTs send data, the BS or RS sends data to the UTs in the time zone resources of the Access zone multiplexed relay zone. The UTs receive data in the Access zone; of course, the Access zone and the Relay zone can be reversed.
  • the BS or the RS transmits data to a UT within its jurisdiction through the time-frequency resource on the Access zone, and the BS or the RS also sends data to one or more subordinate RSs within its jurisdiction, and the BS or the RS complex
  • the time-frequency resources on the Access zone are used to send data to the lower-level RSs, and the lower-level RSs receive data in the Relay zone.
  • the BS or the RS transmits data to its subordinate relay station through the relay zone; the BS or RS transmits data to the user terminal under its jurisdiction through the Access zone;
  • the time-frequency resource multiplexing between the Relay zone and the Access zone specifically, whether the time-frequency resource of the Access zone is multiplexed or the time-frequency resource of the Relay zone is multiplexed, which zone is first given the time-frequency by the system
  • the resource is a reference.
  • the BS or the RS learns that the time-frequency resource is first transmitted by the system in the Relay zone, the BS or the RS sends data in the Access zone to multiplex the time-frequency resource of the Relay zone; However, if the BS or the RS learns that the time-frequency resource is first transmitted by the system in the Access zone, the BS or the RS transmits data in the Relay zone to multiplex the time-frequency resource of the Access zone. As shown in FIG.
  • the time-frequency resource multiplexing of the Relay zone (or Access zone) is performed by MC-SDM (Multi-Code Word Space Division Multiplexing), SDM (Single Code Word Space Division Multiplexing) or CDM (Code Division Multiplexing).
  • MC-SDM Multi-Code Word Space Division Multiplexing
  • SDM Single Code Word Space Division Multiplexing
  • CDM Code Division Multiplexing
  • the BS or the RS when the BS or the RS transmits data to one or more of the lower-level RSs through the Relay zone between the Relay zone and the Access zone, the BS or the RS also has one or more jurisdictions under the Access zone. If the UT sends data, the BS or the RS may allocate the time-frequency resources of the Relay zone to the Access zone by using MC-SDM, SDM or CDM;
  • the BS or the RS When the BS or the RS wants to send data to one or more UTs under its jurisdiction through the Access zone, the BS or the RS also sends data to one or more of the lower-level RSs through the Relay zone, and the BS or the RS may also be configured.
  • the time-frequency resources of the Access zone are allocated to the Relay zone by MC-SDM, SDM or CDM.
  • FIG. 3 is a schematic diagram of execution of time-frequency resource multiplexing according to an embodiment of the present invention. It is stipulated in the system that the BS or RS can reuse multiple time-frequency resources in a Relay zone or Access zone according to different '
  • the lower-level RS and/or multiple UTs transmit data, and apply some multiplexing mode (MC-SDM, SDM, or CDM) to perform time-frequency resource multiplexing and data transmission.
  • M-SDM multiplexing mode
  • the system applies different processing methods depending on whether the time-frequency resource multiplexing occurs in the Relay zone or the Access zone, or between the Relay zone and the Access zone; For the time-frequency resource multiplexing in the Relay zone or the Access zone Executing S2; for time-frequency resource multiplexing between the Relay zone and the Access zone, executing S3;
  • the relay zone is first assigned a time-frequency resource
  • the time-frequency resources in the Relay zone are multiplexed by the MC-SDM, SDM, or CDM.
  • the other one or more lower-level RSs perform data transmission, and execute S4; or, if the Access zone is first given a time-frequency resource, the BS or the RS transmits data to a UT within its jurisdiction through its Access zone, and uses MC- SDM, SDM, or CDM reuses time-frequency resources in the Access zone to perform data to one or more other UTs within its jurisdiction Send, execute S4;
  • the relay zone if the relay zone is first given a time-frequency resource, when the BS or the RS sends data to one of the lower-level RSs through the relay zone, the BS or the RS may use the corresponding multiplexing mode to adjust the time-frequency of the relay zone.
  • the resource is allocated to its Access zone for multiplexing, so that the time-frequency resource on the BS or RS multiplexed Relay zone sends data to the UT within its jurisdiction, and executes S4;
  • the Access zone is first given a time-frequency resource
  • the BS or the RS may also use the corresponding multiplexing mode to access the zone.
  • the frequency resource is allocated to the Relay zone multiplex, so that the BS or the RS multiplexes the time-frequency resources on the Access zone to send data to the lower-level RS, and executes S4;
  • select multiplexing mode such as: MC-SDM, SDM or CDM, for time-frequency resource multiplexing, if MC-SDM mode is selected, press S5 for processing; if SDM mode is selected, press S6 for processing; if CDM mode is selected , processed according to S7;
  • the data in a certain data group to be sent is used to distinguish the RS or UT of the data in the data group by using a group of code resources to occupy the same time-frequency resource, and the other data groups may use the same or different code as the data group.
  • the resource to the area occupies the same time-frequency resource to receive the RS or UT of the data in the corresponding data group, and executes S8;
  • the data to be sent is divided into two groups by using the space division method: Group 1 and Group 2. Since the space division is used, the two groups can be distinguished, so the two groups can use the same time-frequency resource in the time-frequency two-dimensional, and the orthogonal time can be used in the time-frequency resource of the group 1.
  • the code resources are code-multiplexed, and the time-frequency resources of the group 2 can be code-multiplexed by using the code resources of the group 1 or the code resources different from the group 1;
  • the spatial region distinguishes the RS or the UT occupying the same time-frequency resource between the data streams, that is, the RS or the UT are in different spaces in the same time-frequency resource.
  • the area sends the corresponding data stream, and executes S8;
  • S8 Perform data transmission according to a corresponding time-frequency resource multiplexing manner.
  • the time-frequency resource multiplexing method described above is applicable to a communication system without a relay station, for example, an existing communication system. At this time, it is equivalent to only multiplexing in the Access zone, that is, a UT applies to the BS.
  • the time-frequency resource in the access zone, and then the BS can send data to one or more UTs on the time-frequency resource in the Access zone, and different UTs are multiplexed by using space division or code division.
  • the invention solves the problem of the utilization of the time-frequency resource brought by the introduction of the relay in the system, and ensures the coverage of the relay station, and the time-frequency resource reuse is simple.

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  • Computer Networks & Wireless Communication (AREA)
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Description

一种时频资源复用的方法
技术领域
本发明涉及一种时频资源复用的方法， 尤其涉及在 OFDM ( Orthogonal Frequency Division Multiplexing正交频分复用） 系统中时频资源复用的方法。 背景技术
B3G/4G的研究目标是汇集蜂窝、 固定无线接入、 游牧、 无线区域网络等 接入系统， 结合全 IP网络， 在高速和低速移动环境下分别为用户提供峰值速 率达 100Mbps以及 lGbps的无线传输能力， 并且实现蜂窝系统、 区域性无线 网络、 广播、 电视卫星通信的无缝衔接， 使得 "任何人可以在任何时间、 任 何地点与其他任何人实现任何方式的通信"。 Relay (中继）技术可以作为一 项有效的措施应用起来， Relay技术既可以增加小区的覆盖也可以增加小区容 量。 在引入 Relay技术后， 会引发较多的问题， 如时频资源利用是需要深入 研究的问题。
时频资源管理对于 OFDM通信系统非常重要，特别是对于引入 RS( Relay Station 中继站）的网络。在两跳系统中，一般情况下将要给 UT ( User Terminal 用户终端）传输的数据， 首先由 BS ( Base Station基站）在 Relay zone (中继 区 )发送给 RS, 此时 UT往往是停止接收的或者 UT接收不到数据， 再由 RS 在 Access zone (接入区）发送给 UT, 此两跳系统所占用的时频资源最多是 没有 RS的系统的两倍， 这导致了时频资源利用率的下降。
目前， 为了提高时频资源的利用率， 对于时频资源复用的研究成为热点， 但对于 Relay存在时的时频资源复用方式的研究较少， 目前的系统都是釆用 根据干扰测量的方式。 例如， 一个 UT1处于一个 RS的覆盖范围内， 而另一 个 UT2处于一个 BS的覆盖范围内， 这两个覆盖范围相隔较远， 相互间的干 扰相对较小， 因此在 RS向 UT1发送数据、 BS向 UT2发送数据时， 可以使 用同一时频资源。 但这种方式并不是真正的时频资源复用， 只是根据干扰的 大小来决定是否使用同一时频资源， 显然这种方式不可避免地还是会带来不 同程度上的干扰。 发明内容
本发明要解决的技术问题是提供一种时频资源复用的方法， 解决了引入 中继后时频资源利用率下降的问题。
为了解决上述问题， 本发明提供了一种时频资源复用的方法， 包括： 基站或中继站复用一个中继区 Relay zone内的时频资源向一个或多个下 级中继站和 /或一个或多个用户终端发送数据； 或者，
基站或中继站复用一个接入区 Access zone 内的时频资源向一个或多个 下级中继站和 /或一个或多个用户终端发送数据。 进一步地， 所述基站或中继站通过所述 Relay zone向其下级中继站发送 数据；所述基站或中继站通过所述 Access zone向其所管辖的用户终端发送数 据。
进一步地， 如果所述基站或中继站检测到系统先赋予时频资源于 Relay zone以供该基站或中继站进行数据发送，则该基站或中继站判定复用该 Relay zone的时频资源， 并选择复用方式向其下级中继站和 /或用户终端完成数据发 送；
如果所述基站或中继站检测到系统先赋予时频资源于 Access zone 以供 该基站或中继站进行数据发送，则该基站或中继站判定复用该 Access zone的 时频资源， 并选择复用方式向其他下级中继站和 /或用户终端完成数据发送。
进一步地， 基站或中继站通过 Relay zone上的时频资源向其一个下级中 继站发送数据时， 复用该 Relay zone上的时频资源向其他一个或多个下级中 继站发送数据。
进一步地，基站或中继站通过 Access zone上的时频资源向其所管辖的一 个用户终端发送数据时，复用该 Access zone上的时频资源向其他一个或多个 用户终端发送数据。
进一步地， 基站或中继站通过 Relay zone上的时频资源向其下级中继站 发送数据时， 将该 Relay zone上的时频资源在 Access zone内进行复用， 向其 管辖的一个或多个用户终端发送数据。 进一步地，基站或中继站通过 Access zone上的时频资源向其管辖的用户 终端发送数据时 , 将该 Access zone上的时频资源在 Relay zone内进行复用， 向其一个或多个下级中继站发送数据。
进一步地， 所述时频资源复用釆用多码字空分复用、 单码字空分复用或 码分复用实现。
进一步地， 釆用多码字空分复用发送数据时， 首先对数据分组， 各组数 据之间使用空分复用方式向占用了相同时频资源的中继站或用户终端发送相 应数据， 各组内数据使用码分复用向占用了相同时频资源的中继站或用户终 端发送相应数据。 进一步地， 釆用单码字空分复用发送数据时， 利用不同的空间区域向占 用了相同时频资源的中继站或用户终端发送对应的数据。
进一步地， 釆用码分复用发送数据时， 利用不同的码资源向占用了相同 时频资源的中继站或用户终端发送对应的数据。
与现有技术相比， 本发明通过合理划分、 利用空间特性， 解决了由于系 统中引入中继后带来的时频资源利用率下降的问题， 同时保证了中继站的覆 盖范围， 而且时频资源复用实现简单， 在复用的同时还可以避免发生干扰。 附图简述
图 1 是本发明一个实施方式的 zone内的时频资源复用示意图。
图 2 是本发明另一个实施方式的 zone间的时频资源复用示意图。
图 3 是本发明一个实施方式的时频资源复用的执行示意图。
本发明详述
以下结合附图， 通过具体实施例进一步阐述本发明所述的一种时频资源 复用的方法， 然而， 应理解， 以下的详细描述只是通过一些实施方式来对本 发明进行说明， 但不是想要对本发明进行任何限定。 使用本发明的时频资源复用方法， 对于 Relay zone内的时频资源复用， 如果 BS或 RS通过 Relay zone上的时频资源向其管辖内的某一个下级 RS发 送数据的同时， 还需要向该 BS或 RS管辖内的其它 RS发送数据， 则该 BS 或 RS复用所述 Relay zone上的时频资源向这些 RS发送数据；
对于 Access zone内的时频资源复用， BS或 RS通过 Access zone上的时 频资源向其管辖内的某一个 UT发送数据的同时， 还需要向该 BS或 RS管辖 内的其它 UT发送数据，则该 BS或 RS复用所述 Access zone上的时频资源向 这些 UT发送数据；
对于 Relay zone和 Access zone间的时频资源复用， BS或 RS通过 Relay zone上的时频资源向其管辖内的某一个下级 RS发送数据的同时， 该 BS或 RS还要向其管辖内的一个或多个 UT发送数据，则该 BS或 RS在 Access zone 复用 Relay zone上的时频资源向这些 UT发送数据， 这些 UT在 Access zone 内接收数据； 当然 Access zone和 Relay zone间可以反过来， BS或 RS通过 Access zone上的时频资源向其管辖内的一个 UT发送数据的同时， 该 BS或 RS还要向其管辖内的一个或多个下级 RS发送数据，则该 BS或 RS复用 Access zone上的时频资源向这些下级 RS发送数据，这些下级 RS在 Relay zone内接 收数据。
另外， 需要说明， BS或 RS通过 Relay zone向其下级中继站发送数据； BS或 RS通过 Access zone向其所管辖的用户终端发送数据；
而且， 对于 Relay zone和 Access zone间的时频资源复用， 具体是 Access zone的时频资源被复用还是 Relay zone的时频资源被复用的说法， 是以哪个 zone先被系统赋予时频资源为参照， 例如， 如果 BS或 RS获知先被系统赋予 时频资源在 Relay zone内发送数据， 此时该 BS或 RS在 Access zone内发送 数据就是复用该 Relay zone的时频资源； 反之亦然， 如果 BS或 RS获知先被 系统赋予时频资源在 Access zone内发送数据,此时该 BS或 RS在 Relay zone 内发送数据就是复用该 Access zone的时频资源。 如图 1所示，在 Relay zone (或 Access zone )内, BS在向其下级 RS (或 UT )进行数据发送时或第 m级 RS在向其多个下级 RS (或 UT )进行数据发 送时， 釆用 MC-SDM (多码字空分复用）、 SDM (单码字空分复用）或 CDM (码分复用 )对 Relay zone (或 Access zone )进行时频资源复用。
如图 2所示，在 Relay zone和 Access zone间，在 BS或 RS通过 Relay zone 向其一个或多个下级 RS进行数据发送时， BS或 RS还要通过 Access zone向 其所管辖的一个或多个 UT发送数据， 则所述 BS或 RS可以釆用 MC-SDM、 SDM或 CDM将 Relay zone的时频资源分配给 Access zone复用；
在 BS或 RS要通过 Access zone向其所管辖的一个或多个 UT发送数据 时， BS或 RS还要通过 Relay zone向其一个或多个下级 RS进行数据发送， 所述 BS或 RS也可以釆用 MC-SDM、 SDM或 CDM将 Access zone的时频资 源分配给 Relay zone复用。
如图 3所示， 为本发明实施例的时频资源复用的执行示意图。 在系统内 规定：才艮据不同 '|"青况 ( Relay zone或 Access zone内、 Relay zone和 Access zone 之间）BS或 RS可以复用一个 Relay zone或 Access zone内的时频资源向多个 下级 RS和 /或多个 UT发送数据，应用某种复用方式（ MC-SDM、 SDM或 CDM ) 进行时频资源复用以及数据发送， 具体执行如下：
51 , 系统依据时频资源复用是发生在 Relay zone或 Access zone内， 还是 Relay zone和 Access zone之间这两种情况适用不同的处理方式； 对于 Relay zone或 Access zone内的时频资源复用 ,执行 S2;对于 Relay zone和 Access zone 间的时频资源复用， 执行 S3;
52 , 如果 Relay zone先被赋予时频资源， 则 BS或 RS通过其 Relay zone 向其一个下级 RS进行数据发送时，釆用 MC-SDM、 SDM或 CDM复用 Relay zone内的时频资源， 向其他一个或多个下级 RS进行数据发送， 执行 S4; 或者， 如果 Access zone先被赋予时频资源， 则 BS或 RS通过其 Access zone向其管辖内的一个 UT进行数据发送时， 釆用 MC-SDM、 SDM或 CDM 复用 Access zone内的时频资源， 向其管辖内的其他一个或多个 UT进行数据 发送， 执行 S4;
S3 , 如果 Relay zone先被赋予时频资源， 则 BS或 RS通过其 Relay zone 向其一个下级 RS进行数据发送时， 所述 BS或 RS可以釆用相应的复用方式 将其 Relay zone的时频资源分配给其 Access zone复用， 这样所述 BS或 RS 复用 Relay zone上的时频资源向其管辖内的 UT发送数据， 执行 S4;
或者， 如果 Access zone先被赋予时频资源， 则 BS或 RS通过其 Access zone向其管辖内的 UT进行数据发送时， 所述 BS或 RS也可以釆用相应的复 用方式将 Access zone的时频资源分配给 Relay zone复用，这样所述 BS或 RS 复用 Access zone上的时频资源向其下级 RS发送数据， 执行 S4;
S4, 选用复用方式， 如： MC-SDM、 SDM或 CDM, 进行时频资源复用， 如果选择 MC-SDM方式， 按 S5进行处理； 如果选择 SDM方式， 按 S6进行 处理； 如果选择 CDM方式， 按 S7进行处理；
S5 , 时频资源复用釆用 MC-SDM时， 利用空分方式对数据分组， 使得各 数据组之间， 利用空间区域来区分占用相同时频资源以接收各数据组的 RS 或 UT;
使待发送的某一数据组内的数据之间利用一组码资源区分占用相同时频 资源来接收该数据组内数据的 RS或 UT, 其他数据组可以利用与该数据组相 同或不同的码资源来区占用相同时频资源以接收对应数据组内数据的 RS 或 UT, 执行 S8;
此处以一个应用实例来说明， 首先假设利用空分方式将待发送的数据分 为 2组： 组 1和组 2。 由于釆用了空分， 已经能够区分开这 2个组了， 所以这 2个组在时频两维上可以使用相同的时频资源， 而在组 1 的时频资源上可以 用正交的码资源进行码复用， 组 2的时频资源可以用组 1的码资源也可以用 与组 1不同的码资源进行码复用；
S6, 时频资源复用釆用 SDM 时， 数据流之间利用空间区域区分数据流 间占用了相同时频资源的 RS或 UT, 即在相同时频资源内对 RS或 UT分别 在不同的空间区域发送对应的数据流， 执行 S8;
S7 , 时频资源复用釆用 CDM时， 利用码资源区分占用了相同时频资源 的 RS或 UT, 即在相同时频资源内对 RS或 UT分别用不同的码资源进行数 据发送， 执行 S8;
S8, 依相应的时频资源复用方式， 进行数据发送。
以上所述的时频资源复用方法， 对于没有中继站的通信系统， 例如现有 的通信系统本发明同样适用， 此时相当于只存在对 Access zone内的复用， 即 由一个 UT向 BS申请 Access zone内时频资源， 然后 BS可以在这个 Access zone内的时频资源上对一个或多个 UT发送数据， 不同 UT利用空分或码分 来复用。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
本发明通过合理划分、 利用空间特性， 解决了由于系统中引入中继后带 来的时频资源利用率下降的问题， 同时保证了中继站的覆盖范围， 时频资源 复用简单。

Claims

权 利 要 求 书
1、 一种时频资源复用的方法， 其特征在于， 包括：
基站或中继站复用一个中继区 Relay zone内的时频资源向一个或多个下 级中继站和 /或一个或多个用户终端发送数据； 或者，
基站或中继站复用一个接入区 Access zone 内的时频资源向一个或多个 下级中继站和 /或一个或多个用户终端发送数据。
2、 如权利要求 1所述的方法， 其特征在于， 所述基站或中继站通过所述 Relay zone向其下级中继站发送数据； 所述 基站或中继站通过所述 Access zone向其所管辖的用户终端发送数据。
3、 如权利要求 2所述的方法， 其特征在于，
如果所述基站或中继站检测到系统先赋予时频资源于所述 Relay zone以 供该基站或中继站进行数据发送， 则该基站或中继站判定复用该 Relay zone 的时频资源， 并选择复用方式向其下级中继站和 /或用户终端进行数据发送； 如果所述基站或中继站检测到系统先赋予时频资源于所述 Access zone 以供该基站或中继站进行数据发送， 则该基站或中继站判定复用该 Access zone的时频资源， 并选择复用方式向其他下级中继站和 /或用户终端进行数据 发送。
4、 如权利要求 3所述的方法， 其特征在于，
基站或中继站通过 Relay zone上的时频资源向其一个下级中继站发送数 据时， 复用该 Relay zone上的时频资源向其他一个或多个下级中继站发送数 据。
5、 如权利要求 3所述的方法， 其特征在于，
基站或中继站通过 Relay zone 上的时频资源向其下级中继站发送数据 时， 将该 Relay zone上的时频资源在 Access zone内进行复用， 向其管辖的一 个或多个用户终端发送数据。
6、 如权利要求 3所述的方法， 其特征在于，
基站或中继站通过 Access zone上的时频资源向其所管辖的一个用户终 端发送数据时，复用该 Access zone上的时频资源向其他一个或多个用户终端 发送数据。
7、 如权利要求 3所述的方法， 其特征在于，
基站或中继站通过 Access zone上的时频资源向其管辖的用户终端发送 数据时， 将该 Access zone上的时频资源在 Relay zone内进行复用， 向其一个 或多个下级中继站发送数据。
8、 如权利要求 1所述的方法， 其特征在于，
所述时频资源复用釆用多码字空分复用、 单码字空分复用或码分复用实 现。
9、 如权利要求 8所述的方法， 其特征在于，
釆用多码字空分复用发送数据时， 首先对数据分组， 之后在各数据组之 间通过空分复用方式向占用了相同时频资源的中继站或用户终端发送相对应 的数据， 在各数据组内通过码分复用方式向占用了相同时频资源的中继站或 用户终端发送相对应的数据。
10、 如权利要求 8所述的方法， 其特征在于，
釆用单码字空分复用发送数据时， 利用不同的空间区域向占用了相同时 频资源的中继站或用户终端发送相对应的数据。
11、 如权利要求 8所述的方法， 其特征在于，
釆用码分复用发送数据时， 利用不同的码资源向占用了相同时频资源的 中继站或用户终端发送相对应的数据。
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