WO2010135913A1 - 用于单播业务和广播组播业务集成的方法及其设备 - Google Patents

用于单播业务和广播组播业务集成的方法及其设备 Download PDF

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Publication number
WO2010135913A1
WO2010135913A1 PCT/CN2010/000727 CN2010000727W WO2010135913A1 WO 2010135913 A1 WO2010135913 A1 WO 2010135913A1 CN 2010000727 W CN2010000727 W CN 2010000727W WO 2010135913 A1 WO2010135913 A1 WO 2010135913A1
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Prior art keywords
service
unicast
mbms
time block
integrated
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PCT/CN2010/000727
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English (en)
French (fr)
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晁华
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上海贝尔股份有限公司
阿尔卡特朗讯
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Publication of WO2010135913A1 publication Critical patent/WO2010135913A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/2604Multiresolution systems

Definitions

  • the present invention generally relates to the integration of unicast services and MBMS services, and more particularly to methods and apparatus for unicast services and MBMS service integration.
  • unicast service and the MBMS service can share the same time-frequency resource.
  • this sharing feature is referred to as unicast service and MBMS service integration.
  • the overlap of the unicast service and the MBMS service signal for the OFDM system is proposed in Faroop Khan, Wireless Solutions Laboratory, Samsung Telecommunications America, "Broadcast overlay on unicast via superposition coding and interference cancellation", VTC-2006 Fall ( Superposition) technology.
  • the unicast service and the MBMS service are integrated by the Dirty Paper Coding (hereinafter referred to as DPC) integration technology in the PCT patent application No. PCT/CN2008/001470.
  • DPC Dirty Paper Coding
  • the overlap method requires the UE to first decode the MBMS signal, then decode the unicast signal depending on the decoding result of the MBMS signal, and the DPC method independently decodes the two signals.
  • the MBMS signal is decoded in the same way, that is, the unicast signal is regarded as interference.
  • the interference of the unicast service to the MBMS service comes not only from the serving cell but also from the neighboring cell.
  • the MBMS service of the serving cell still interferes with the unicast service of the neighboring cell. Therefore, it is necessary to jointly consider the coverage of the MBMS service and the interference between the unicast service and the MBMS service between adjacent cells.
  • Figure 8 illustrates an example of a prior art service deployment.
  • cells 1, 3, 4, 5, 6, and 7 transmit unicast traffic and MBMS traffic, while cell 2 transmits only unicast traffic.
  • the unicast traffic from cells 2, 3, 4, 5, 6, and 7 is interference.
  • the transmission power is expected to increase a lot compared to the case where there is no unicast service in other cells at the same time-frequency.
  • the increased MBMS power in cell 1 will more interfere with the unicast in cell 2.
  • MBMS is a power limiting system, it is not always possible to get the expected increased power.
  • a service deployment method needs to be designed to ensure coverage of MBMS services and control interference between unicast services and MBMS services between adjacent cells.
  • Embodiments of the present invention propose a method and apparatus for integrating a unicast service and a multimedia broadcast multicast service, to solve the problem of ensuring coverage of an MBMS service and controlling between a unicast service and an MBMS service between adjacent cells. interference.
  • a method for integrating a unicast service with a Multimedia Broadcast Multicast (MBMS) service including the following steps: dividing a time resource of a serving cell into an integration for unicast service and MBMS service integration. a time block and a TDM time block for performing unicast service and MBMS service transmission in a time division multiplexing (TOM) manner; limiting transmission power of the unicast service transmitted in the integrated time block to enable the unicast service
  • TOM time division multiplexing
  • a transmission device in a network including a resource division unit, configured to divide a time resource of a serving cell into an integrated time block for unicast service and MBMS service integration, and a time division multiplexing (TDM) method for performing a unicast service and a TDM time block for MBMS service transmission; a power limiting unit, configured to limit a transmission power of a unicast service transmitted in an integrated time block divided by the resource division unit The coverage of the unicast service is smaller than the coverage of the MBMS service transmitted in the same integration time block.
  • TDM time division multiplexing
  • a mobile terminal including: a transceiver unit, configured to receive an indication for performing unicast service and multimedia broadcast multicast (MBMS) service integration, where a transmit power of the unicast service is limited And integrated with the MBMS service in an integrated time block for unicast service and MBMS service integration, the transceiver unit is further configured to receive service scheduling information, so that the integrated time-frequency resource reception is integrated And an MBMS service; an implementation unit, configured to perform decoding operations on the integrated unicast service and the MBMS service according to the indication received by the transceiver unit and the service scheduling information.
  • MBMS multimedia broadcast multicast
  • a system for unicast service and MBMS service integration including the transmission device and the mobile terminal described above.
  • the time resources are first divided, and the MBMS service of the neighboring cell may be
  • the unicast service of the serving cell that is causing the interference is scheduled to the TDM time block, so that it cannot interfere with the MBMS service of the neighboring cell, and then the unicast service integrated with the MBMS service in the serving cell is limited in transmission power, and the transmission quality is guaranteed.
  • it reduces the possibility of interference to the MBMS service of the neighboring cell, so that the power of the MBMS is not increased because the interference of the unicast is overcome, and the unicast service and the MBMS service between the adjacent cells are controlled while ensuring the coverage of the MBMS service. Interference.
  • FIG. 1 illustrates a block diagram of a system for unicast service and MBMS service integration in accordance with an embodiment of the present invention
  • FIG. 2 shows a block diagram of a transmission device in a network for unicast traffic and MBMS service integration, in accordance with an embodiment of the present invention
  • FIG. 3 is a block diagram showing a mobile terminal for unicast service and MBMS service integration according to an embodiment of the present invention
  • FIG. 4 shows a flow diagram of a method of performing unicast traffic and MBMS service integration in accordance with an embodiment of the present invention
  • FIG. 5 is a diagram showing an example of performing time resource division according to an embodiment of the present invention
  • FIG. 6 is a diagram showing coverage of unicast service and MBMS service integration according to an embodiment of the present invention
  • FIG. 7 shows a schematic diagram of performing unicast traffic scheduling involving unicast traffic and MBMS service integration, in accordance with an embodiment of the present invention
  • Figure 8 shows a coverage diagram of an example of a service deployment in the prior art. Specific embodiment
  • Embodiments of the present invention address the above problems by introducing interference coordination between SFN cells. For example, first divide the time resource into time blocks for unicast service and MBMS service integration and for time division multiplexing.
  • TDM time block division multiple access
  • the time block of the MBMS service integration limits the transmission power of the unicast service involved in the unicast service and the MBMS service integration, so that it cannot reach the edge of the serving cell to reduce the interference of the unicast to the MBMS service in the neighboring cell.
  • the coverage of the MBMS service and the interference between the unicast service and the MBMS service between adjacent cells are coordinated in the above manner.
  • the transmission device and the mobile terminal in the network described below are included.
  • the embodiment of the present invention further provides a transmission device in a network for unicast service and MBMS service integration.
  • the transmission device includes a resource division unit 210, configured to divide a time resource of a serving cell.
  • TDM time division multiplexing
  • the transmission power of the unicast service transmitted in the divided integrated time block is limited such that the coverage of the unicast service is smaller than the coverage of the MBMS service transmitted in the same integrated time block.
  • the transmission device may further include a scheduling unit 230 for scheduling unicast traffic in which the transmission power is limited in the power limiting unit 220 based on the measurement report on the cell channel fed back by the mobile terminal.
  • the transmission device also includes a rescheduling unit 240 for rescheduling unicast traffic in which the transmit power is limited in the power limiting unit 220 based on the measurement report of the mobile terminal.
  • the embodiment of the present invention further provides a mobile terminal for unicast service and MBMS service integration.
  • the method includes: a transceiver unit 310, configured to receive an indication for performing a unicast service and an MBMS service integration operation, where The transmit power of the unicast service is limited, and is integrated with the MBMS service in an integrated time block for unicast service and MBMS service integration.
  • the transceiver unit 310 is further configured to receive service scheduling information, so as to be correct.
  • the time-frequency resource receives the integrated unicast service and the M3MS service.
  • the implementation unit 320 is configured to perform the decoding operation on the integrated unicast service and the MBMS service according to the indication received by the transceiver unit 310 and the service scheduling information.
  • the mobile terminal further includes a measurement reporting unit 330 for reporting a measurement report on the channel status by the transceiver unit 310 to enable scheduling or rescheduling of the unicast service with limited transmission power based on the measurement report.
  • each of the components shown in FIGS. 2 and 3 can be implemented by a plurality of devices in practical applications, as shown. Multiple components can also be integrated into a single chip or a device in practical applications.
  • the transmission device and mobile terminal may also include any unit and device for other purposes.
  • Figure 4 illustrates a transmission method for unicast traffic and MBMS traffic provided by an embodiment of the present invention. As shown in Figure 4, the method includes the following steps:
  • step 410 the resource dividing unit 210 divides the time resource into an integrated time block of the unicast service and the MBMS service integration and a TDM time block for performing the unicast service and the MBMS service transmission in the TDM manner.
  • FIG. 5 shows an example of time resource partitioning.
  • the first, fourth, and sixth time blocks are used as integrated time blocks for integrally transmitting unicast traffic and MBMS services, and will be 2, 3, and 5
  • the time blocks are used as TDM time blocks for transmitting unicast services and MBMS services in TDM mode.
  • the partitioning may be dynamic or periodic.
  • the dynamic division mentioned here refers to the actual transmission condition of the unicast service and the MBMS service, and the dynamic selection transmission mode in each time block is integrated transmission or TDM transmission, and has integrated transmission conditions (for example, can be used for integration).
  • the unicast service accounts for a certain proportion, the integrated transmission is preferred.
  • the periodic division mentioned here means that the number of integrated time blocks and the number of TDM time blocks are relatively fixed, and the two time blocks are periodically rotated and transmitted. This method reduces the processing complexity by performance loss.
  • the period can be chosen to be a few hundred milliseconds.
  • the resolution of the time resource may be defined.
  • each time block may be limited to 1 to several milliseconds, which may be performed by the operator in the network. Determine it yourself during the operation.
  • step 430 power limiting unit 220 limits the transmit power of the unicast signal being transmitted in the integrated time block.
  • FIG. 6 shows an overlay of unicast traffic and MBMS service integration in accordance with an embodiment of the present invention.
  • the dark gray area indicates the coverage of the MBMS service
  • the checkered pattern indicates the coverage of the integrated unicast service, which is smaller than the coverage of the MBMS service.
  • power control unit 220 limits the coverage of unicast traffic involving unicast traffic and MBMS traffic integration to 50% of the cell radius, which is less than the coverage of the MBMS traffic (typically defined as 95% of the cell radius).
  • the unicast service in the area does not interfere with the MBMS service in the neighboring cell, that is, the interference between the unicast service and the MBMS service in the same time-frequency only occurs in the serving cell and does not involve the neighboring cell. Interference between unicast services of neighboring cells does not exist either. Therefore, the power configuration for the MBMS service only needs to consider the serving cell, making it easier to implement overlap and DPC integration. Especially for DC integration, the implementation of DPC integration is simplified since only the sum of the power of the MBMS service of the serving cell, rather than the power of the multi-cell MBMS service, is encoded as interference.
  • the power limiting unit 220 notifies the UE of the unicast service and the MBMS service integration indicator by control signaling to indicate that it can perform a special decoding operation if necessary.
  • the unicast service and the MBMS service scheduling information can also be notified to the UE through control signaling to direct it to receive its service at the correct time-frequency resource.
  • the UE implementation unit 320 performs the correct unicast service and the MBMS service decoding operation according to the indications received by the transceiver unit 310.
  • step 420 may also be included prior to step 430.
  • scheduling unit 230 schedules the unicast traffic sent in the integrated time block.
  • the power limiting unit 220 in step 430 limits the transmit power of the scheduled unicast traffic.
  • the scheduling unit 230 selects a unicast service integrated with the MBMS based on the transmission power rather than randomly.
  • the UE that needs to receive the unicast service feeds back to the network a measurement report on the channel state.
  • the scheduling unit 230 determines, based on the processing report fed back by the measurement reporting unit 330 of the UE, the candidate unicast UE group that can participate in the unicast service and the MBMS service integration, and selects the unicast service that can be sent within the preset power threshold. group.
  • Fig. 7 shows an example of unicast traffic scheduling. In this example, it is assumed that one MBMS service and three UE unicast services can be accommodated simultaneously in the same time-frequency.
  • UE1, UE2, UE3, and UE4 are selected as integration candidate groups according to the measurement report reported by the UE, and unicast from UE1, UE2, and UE3 is scheduled.
  • the business integrates with the MBMS service.
  • the scheduling principle may be that a plurality of UEs with the best channel quality are randomly selected or selected, and the unicast service of the unselected UEs in the integrated candidate group is scheduled into the TDM time block.
  • Unicast services and MBMS service integration can be achieved by overlapping or DPC integration in the first time block.
  • step 440 can also be included.
  • the rescheduling unit 440 reschedules the unicast traffic sent within the integrated time block.
  • the reselection scheduling of the unicast service is also performed according to the measurement report.
  • the rescheduling The unit 440 may re-schedule the time-frequency resources in the TDM time block for the unicast service, and select a unicast service of another UE that can participate in the unicast service and the MBMS service integration.
  • This scheduling principle for unicast services and MBMS service integration ensures that the coverage of MBMS services during integration operations always meets system performance requirements.
  • the rescheduling unit 240 will UEI Removed from the integration candidate set, UE4 is scheduled to replace UE1 to perform unicast service and MBMS service integration.
  • the rescheduling unit 240 may also select a new UE to join the integration candidate group according to the measurement report received from the UE, or in a manner that is easily conceivable to those skilled in the art. Identify new integration candidate groups.
  • rescheduling unit 240 schedules UE1 to the TDM time block, i.e., the seventh time block in this example, in which power control as in the prior art can be performed. It can be seen that since there is only a unicast service in the time block, the power control of the unicast service does not cause interference to the MBMS service. Rescheduling unit 240 may also update the scheduling information for UE1 in the control signaling addressed to UEI.
  • the interference between the unicast service and the MBMS service in the serving cell is limited and thus the integration of the unicast service and the MBMS service is easy to implement.
  • the technical solution provided by the embodiments of the present invention does not cause high MBMS power that may not be obtained because of unicast interference from neighboring cells.
  • some embodiments also include a machine readable or computer readable program storage device (eg, a digital data storage medium) and encoding machine executable or computer executable program instructions, wherein the instructions perform some of the above methods or All steps.
  • the program storage device can be a digital memory, a magnetic memory Storage media (such as disk and tape), hardware or optically readable digital data storage media.
  • Embodiments also include a programming computer that performs the steps of the above method.

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Description

用于单播业务和广播组播业务集成的方法及其设备 技术领域
本发明大致涉及单播业务和 MBMS业务的集成, 更具体地, 涉及用于单播业 务和 MBMS业务集成的方法及其设备。 背景技术
已预见在未来的无线通信系统(如 IMT-Advanced)中, 不再需要对单播业务和 多媒体广播组播(MBMS )业务的正交资源分配做出限制。换言之,单播业务和 MBMS 业务可以共享相同的时-频资源。 在下面的描述中, 该共享特征被称为单播业务和 MBMS业务集成。 作为候选技术, 在 Faroop Khan, Wireless Solutions Laboratory, Samsung Telecommunications America, "Broadcast overlay on unicast via superposition coding and interference cancellation", VTC-2006 Fall中提出了针对 OFDM系统的单播 业务和 MBMS业务信号的重叠(superposition)技术。在申请号为 PCT/CN2008/001470 的 PCT专利申请中提出通过脏纸编码(Dirty Paper Coding, 下文简称为 DPC)集成技 术来集成单播业务和 MBMS业务。
重叠方法要求 UE首先对 MBMS信号进行解码, 然后依赖 MBMS信号的解码结 果对单播信号进行解码, 而 DPC方法对两个信号进行独立解码。 虽然这两种方法对 待单播信号的方式有所区别, 但都以同样的方式对 MBMS信号进行解码, 即将单播 信号视为干扰。 在多小区单频网 (SFN) 的情况下, 单播业务对 MBMS业务的干扰 不仅来自服务小区, 还来自邻小区。 另一方面, 特别是当服务小区的一个或多个邻 小区不发送 MBMS业务时, 服务小区的 MBMS业务仍然对邻小区的单播业务造成干 扰。 因此需要协同考虑 MBMS业务的覆盖和相邻小区间单播业务和 MBMS业务之间 的干扰。
图 8示出了现有技术中业务部署的一个示例。 在图 8中, 小区 1、 3、 4、 5、 6和 7 传输单播业务和 MBMS业务, 而小区 2只传输单播业务。 当考虑小区 1时, 对于小区 1 中的 MBMS业务来说, 来自小区 2、 3、 4、 5、 6和 7的单播业务是干扰。 为了保证小 区 1中 MBMS业务的覆盖, 与在相同的时-频下其它小区中没有单播业务的情况相比, 预计发射功率将增加很多。进而, 与小区 1中没有单播业务和 MBMS业务的集成的情 况相比, 小区 1中增大的 MBMS功率将更大地干扰小区 2中的单播^:务。 此外, 由于 MBMS是功率限制系统, 并不总是可能得到预计增加的功率。
为了解决上述问题, 需要设计一种业务部署的方法以确保 MBMS业务的覆盖 并控制相邻小区间单播业务和 MBMS业务之间的干扰。 发明内容
本发明的实施方式提出了用于对单播业务与多媒体广播组播业务进行集成的 方法及其设备, 以解决以确保 MBMS业务的覆盖并控制相邻小区间单播业务和 MBMS业务之间的干扰。
在本发明的一方面, 提出了一种单播业务与多媒体广播组播(MBMS )业务集 成的方法, 包括以下步骤: 将服务小区的时间资源划分为用于单播业务和 MBMS业 务集成的集成时间块和用于以时分复用 (TOM) 的方式进行单播业务和 MBMS业务 传输的 TDM时间块; 对在集成时间块中进行发送的单播业务的发射功率进行限制以 使该单播业务的覆盖小于相同集成时间块中进行发送的 MBMS业务的覆盖。
在本发明的另一方面, 提出了一种网络中的传输设备, 包括资源划分单元, 用 于将服务小区的时间资源划分为用于单播业务和 MBMS业务集成的集成时间块和用 于以时分复用 (TDM)方式进行单播业务和 MBMS业务传输的 TDM时间块; 功率限 制单元, 用于对在资源划分单元所划分的集成时间块中进行发送的单播业务的发射 功率进行限制以使该单播业务的覆盖小于相同集成时间块中进行发送的 MBMS业务 的覆盖。
在本发明的又一方面, 提出了一种移动终端, 包括: 收发单元, 用于接收进行 单播业务和多媒体广播组播 (MBMS ) 业务集成的指示, 其中该单播业务的发射功 率受到限制, 并与 MBMS业务集成在用于单播业务和 MBMS业务集成的集成时间块 中以进行传输, 该收发单元还用于接收业务调度信息, 以便在正确的时 -频资源接收 进行了集成的单播业务和 MBMS业务; 实施单元, 用于根据收发单元接收到的指示 和业务调度信息对进行了集成的单播业务和 MBMS业务进行解码操作。
在本发明的再一方面, 提出了一种用于单播业务和 MBMS业务集成的系统, 包 括以上所述的传输设备和移动终端。
通过上述的技术方案, 首先将时间资源进行划分, 将可能对邻小区 MBMS业务 造成干扰的服务小区单播业务调度到 TDM时间块中, 使其不能对邻小区 MBMS业务 造成干扰,然后对服务小区中与 MBMS业务进行集成的单播业务进行发射功率限制, 在保证其传输质量的同时降低其对邻小区 MBMS业务造成干扰的可能性, 从而无需 因为克服单播的干扰而增大 MBMS的功率, 在确保 MBMS业务的覆盖的同时控制相 邻小区间单播业务和 MBMS业务之间的干扰。
附图说明
结合附图对本发明的实施方式进 详细的描述, 可更好地理解本发明, 其中: 图 1示出了根据本发明的实施方式用于单播业务和 MBMS业务集成的系统的方 框图;
图 2示出了根据本发明的实施方式用于单播业务和 MBMS业务集成的网络中的 传输设备的方框图;
图 3示出了根据本发明的实施方式用于单播业务和 MBMS业务集成的移动终端 的方框图;
图 4示出了根据本发明的实施方式进行单播业务和 MBMS业务集成的方法的流 程图;
图 5示出了根据本发明的实施方式进行时间资源划分的一个示例的示意图; 图 6示出了根据本发明的实施方式的单播业务和 MBMS业务集成的覆盖示意 图;
图 7示出了根据本发明的实施方式进行涉及单播业务和 MBMS业务集成的单播 业务调度的示意图;
图 8示出了现有技术中进行业务部署的一个示例的覆盖示意图。 具体实施例
下面参照附图对本发明的优选实施例进行详细说明,在描述过程中省略了对于 本发明来说是不必要的细节和功能, 以防止对本发明的理解造成混淆。
本发明的实施例通过引入 SFN小区间的干扰协调解决上述问题。 例如, 首先将 时间资源划分成用于单播业务和 MBMS业务集成的时间块和用于以时分复用
(TDM) 的方式进行单播业务和 MBMS业务传输的时间块, 然后在用于单播业务和 MBMS业务集成的时间块中限制涉及单播业务和 MBMS业务集成的单播业务的发射 功率, 使其不能到达服务小区的边缘以减少该单播对邻小区中 MBMS业务的干扰。 通过以上方式协调 MBMS业务的覆盖和相邻小区间单播业务和 MBMS业务之间的干 扰。
本发明的实施方式中提出了一种用于单播业务和 MBMS业务集成的系统,如图
1所示, 包括以下所述的网络中的传输设备和移动终端。
本发明的实施方式还提出了一种用于单播业务和 MBMS业务集成的网络中的 传输设备, 如图 2所示, 该传输设备包括资源划分单元 210, 用于将服务小区的时间 资源划分为用于单播业务和 MBMS业务集成的集成时间块和用于以时分复用 (TDM ) 方式进行单播业务和 MBMS业务传输的 TDM时间块; 功率限制单元 220, 用于在资源划分单元 210所划分的集成时间块中进行发送的单播业务的发射功率进 行限制以使该单播业务的覆盖小于相同集成时间块中进行发送的 MBMS业务的覆 生
该传输设备还可以包括调度单元 230, 用于基于移动终端反馈的关于小区信道 的测量报告调度在功率限制单元 220中发射功率受到限制的单播业务。
该传输设备还包括重调度单元 240, 用于基于移动终端的测量报告重新调度在 功率限制单元 220中发射功率受到限制的单播业务。
本发明的实施方式还提供了一种用于单播业务和 MBMS业务集成的移动终端, 如图 3所示, 包括: 收发单元 310, 用于接收进行单播业务和 MBMS业务集成操作的 指示, 其中单播业务的发射功率受到限制, 并与 MBMS业务集成在用于单播业务和 MBMS业务集成的集成时间块中以进行传输,该收发单元 310还用于接收业务调度信 息, 以便在正确的时-频资源接收进行了集成的单播业务和 M3MS业务: 实施单元 320, 用于根据收发单元 310接收到的指示和业务调度信息对进行了集成的单播业务 和 MBMS业务进行解码操作。
该移动终端还包括测量上报单元 330,用于通过收发单元 310上报关于信道状态 的测量报告, 以使得能够基于该测量报告调度或重新调度发射功率受到限制的单播 业务。
虽然上面以分离的功能模块的形式描述了本发明实施例的传输设备和移动终 端, 但是图 2和图 3中示出的每一个组件在实际应用中可以用多个器件实现, 示出的 多个组件在实际应用中也可以集成在一块芯片或一个设备中。 该传输设备和移动终 端也可包括用于其它目的的任何单元和装置。
下面结合附图 4到 8详细描述上述传输设备和移动终端 (例如 UE) 的具体结构 和操作过程。
图 4示出了本发明的实施方式提供的一种用于用于单播业务和 MBMS业务的传 输方法。 如图 4所示, 该方法包括以下步骤:
在步骤 410中,资源划分单元 210将将时间资源划分为单播业务和 MBMS业务集 成的集成时间块和用于以 TDM的方式进行单播业务和 MBMS业务传输的 TDM时间 块。
图 5示出了时间资源划分的一个示例, 如图 5所示, 将第 1、 第 4和第 6时间块作 为集成发送单播业务和 MBMS业务的集成时间块,将第 2、 3和 5个时间块作为以 TDM 方式发送单播业务和 MBMS业务的 TDM时间块。
根据本发明的实施例, 该划分可以是动态的或周期性的。 例如, 这里所说的动 态划分是指根据单播业务和 MBMS业务的实际发送情况, 在每个时间块动态选择发 送方式是集成发送还是 TDM发送, 具备集成发送条件 (例如, 能被用于集成的单播 业务占到一定比例) 时, 优先选择集成发送。 这里所说的周期性划分是指集成时间 块的个数和 TDM时间块的个数分配相对固定, 两种时间块周期性轮换发送, 这种方 式以性能损耗带来处理复杂度的降低, 划分的周期可以选择为几百毫秒。
在本发明的实施方式中, 还可对时间资源的分辨率 (resolution), 即最小的时 间资源单位进行限定, 例如可将每个时间块限定为 1-几个毫秒, 具体可由运营商在 网络运行过程中自行确定。
在步骤 430中,功率限制单元 220对集成时间块中进行发送的单播信号的发射功 率迸行限制。
通过以受限功率的方式发送涉及单播业务和 MBMS业务集成的单播业务,单播 业务对 MBMS业务的干扰得到控制。图 6示出了根据本发明的实施方式的单播业务和 MBMS业务集成的覆盖图。 如图 6所示, 深灰色区域表示 MBMS业务的覆盖, 方格图 案表示涉及集成的单播业务的覆盖, 该覆盖比 MBMS业务的覆盖小。 例如, 功率控 制单元 220将涉及单播业务和 MBMS业务集成的单播业务的覆盖限定为小区半径的 50%, 该覆盖小于 MBMS业务的覆盖 (通常限定为小区半径的 95%)。 因此, 服务小 区中的单播业务不会干扰到临近小区中的 MBMS业务, 就是说同一时-频中单播业务 和 MBMS业务之间的干扰只发生在服务小区而不涉及邻小区。 相邻小区单播业务之 间的干扰也不存在。 因而用于 MBMS业务的功率配置只需要考虑服务小区, 使得重 叠和 DPC集成来说更容易实现。 特别对于 D C集成, 由于只需将服务小区的 MBMS 业务的功率而不是多小区 MBMS业务的功率之和作为干扰进行编码, 从而简化了 DPC集成的实现。
功率限制单元 220通过控制信令将单播业务和 MBMS业务集成 ^示符通知给 UE以指示其如果需要可进行特殊的解码操作。 通过控制信令还可将单播业务和 MBMS业务调度信息通知给 UE以引导其在正确的时-频资源处接收其业务。 UE的实 施单元 320根据收发单元 310接收到的这些指示进行正确的单播业务和 MBMS业务的 解码操作。
在本发明的另一个实施方式中, 在步骤 430之前还可包括步骤 420。 在步骤 420 中, 调度单元 230调度在集成时间块中发送的单播业务。 而步骤 430中功率限制单元 220针对被调度的单播业务的发射功率进行限制。
调度单元 230基于传输功率而非随机地选择与 MBMS集成的单播业务。 为了确 定用于单播业务的发射功率, 需要接收单播业务的 UE向网络反馈关于信道状态的测 量报告。调度单元 230基于 UE的测量上报单元 330反馈的处理报告确定可以参与单播 业务和 MBMS业务集成的候选单播 UE组, 将可以在预先设定的功率阈值内进行发送 的单播业务选入该组。 图 7示出了单播业务调度的一个示例, 在本示例中, 假设在同 一时 -频中可以同时容纳 1个 MBMS业务和 3个 UE的单播业务。 如图 7所示, 在作为集 成时间块的第一个时间块时, 根据 UE上报的测量报告将 UE1、 UE2、 UE3和 UE4选作 集成候选组, 并调度来自 UE1、 UE2和 UE3的单播业务与 MBMS业务进行集成。 调度 原则可以是随机选取或选取信道质量最好的多个 UE, 并将集成候选组中未被选中的 UE的单播业务调度到 TDM时间块中。可以通过在第一个时间块中进行重叠或 DPC集 成以实现单播业务和 MBMS业务集成。
在本发明的另一个实施方式中, 还可以包括步骤 440。 在步骤 440中, 重调度单 元 440重新调度在集成时间块内发送的单播业务。
根据一个实施例, 还根据该测量报告执行单播业务的重选调度。在本实施方式 中, 如果发现需要增加涉及单播业务和 MBMS业务集成的单播业务的功率, 重调度 单元 440可以为该单播业务重新调度 TDM时间块中的时-频资源, 并选择可参与单播 业务和 MBMS业务集成的另一 UE的单播业务。此用于单播业务和 MBMS业务集成的 调度原则可以保证集成操作期间 MBMS业务的覆盖始终满足系统性能要求。
仍以图 7为例, 在第四个时间块时, 根据从 UE接收到的测量报告, 如果发现针 对 UE1的信道状态逐渐恶化并需要增加其发射功率以保证信道质量, 重调度单元 240 将 UEI从集成候选组中移除, 调度 UE4替代 UE1以执行单播业务和 MBMS业务集成。 此时, 如果集成候选组中没有未被调度的 UE, 重调度单元 240也可以根据从 UE接收 到的测量报告选择新的 UE加入集成候选组, 或者以其它本领域普通技术人员容易想 到的方式确定新的集成候选组。 同时, 重调度单元 240将 UE1调度到 TDM时间块, 即 本示例中的第 7个时间块, 在其中可以执行和现有技术一样的功率控制。 可以看到, 由于在该时间块中只有单播业务, 因此对该单播业务的功率控制不会对 MBMS业务 造成干扰。重调度单元 240还可以在发往 UEI的控制信令中更新针对 UE1的调度信息。
如果 SFN中的一个或多个小区不像其它使用单播业务和 MBMS业务集成的小 区一样发送 MBMS业务, 即假定应用了用于 MBMS的各种动态 SFN: 不发送 MBMS 业务并紧挨着使用单播业务和 MBMS业务集成的小区的那些小区只能够以与使用单 播业务和 MBMS业务集成的小区相同的方式发送单播业务,也就是功率受限的方式。 通过这种方式, 也可以在服务小区中控制 MBMS和单播之间的干扰。
通过本发明实施方式所提供的技术方案, 可以带来以下的优点。
1、 限制了服务小区内单播业务和 MBMS业务之间的干扰并因此易于实现单播 业务和 MBMS业务的集成。
2、 本发明实施方式所提供的技术方案不会因为克服来自相邻小区的单播干扰 而导致不一定能获得的高的 MBMS功率。
3、 可应用于重叠和 DPC集成。 特别针对 DPC集成, 由于通过只将服务小区 MBMS业务而不是来自多小区 MBMS业务的功率之和作为干扰流来对单播业务执行 DPC解码, 简化了实现。
本领域技术人员应该很容易认识到,可以通过编程计算机实现上述方法的不同 步骤。 在此, 一些实施方式同样包括机器可读或计算机可读的程序存储设备 (如, 数字数据存储介质) 以及编码机器可执行或计算机可执行的程序指令, 其中, 该指 令执行上述方法的一些或全部步骤。 例如, 程序存储设备可以是数字存储器、 磁存 储介质(如磁盘和磁带)、 硬件或光可读数字数据存储介质。 实施方式同样包括执行 上述方法的所述步骤的编程计算机。
描述和附图仅示出本发明的原理。因此应该意识到, 本领域技术人员能够建议 不同的结构, 虽然这些不同的结构未在此处明确描述或示出, 但体现了本发明的原 理并包括在其精神和范围之内。 此外, 所有此处提到的示例明确地主要只用于教学 目的以帮助读者理解本发明的原理以及发明人所贡献的促进本领域的构思, 并应被 解释为不是对这些特定提到的示例和条件的限制。 此外, 此处所有提到本发明的原 则、 方面和实施方式的陈述及其特定的示例包含其等同物在内。
上面的描述仅用于实现本发明的实施方式, 本领域的技术人员应该理解, 在不 脱离本发明的范围的任何修改或局部替换, 均应该属于本发明的权利要求来限定的 范围, 因此, 本发明的保护范围应该以权利要求书的保护范围为准。

Claims

权 利 要 求
1、 一种单播业务与多媒体广播组播 (MBMS ) 业务集成的方法, 包括: 将服务小区的时间资源划分为用于单播业务和 MBMS业务集成的集成时间块 和用于以时分复用 (TDM) 的方式进行单播业务和 MBMS业务传输的 TDM时间块; 对在所述集成时间块中发送的单播业务的发射功率进行限制以使所述单播业 务的覆盖范围小于相同集成时间块中发送的 MBMS业务的覆盖范围。
2、根据权利要求 1所述的方法, 其中所述划分时间资源包括动态或周期性地对 所述时间资源进行划分。
3、 根据权利要求 1所述的方法, 还包括:
调度单播业务并将其与要在所述集成时间块中发送的 MBMS业务进行集成; 所述对集成时间块中发送的单播业务的发射功率进行限制包括:
对所述被调度的单播业务的发射功率进行限定。
4、 根据权利要求 3所述的方法, 其中, 所述调度单播业务并将其与要在所述集 成时间块中发送的 MBMS业务集成包括:
根据移动终端 (UE) 反馈的关于信道状态的测量报告, 将能够在预先设定的 功率阈值内接收单播业务的 UE选入集成候选组;
根据预定的规则, 调度与所述集成候选组中的 UE相关联的单播业务并将其与 要所述在集成时间块中发送的 MBMS业务集成, 将与所述集成候选组中的剩余 UE以 及不在所述集成候选组中的 UE相关联的单播业务调度到所述 TDM时间块中。
5、 根据权利要求 1至 4之一所述的方法, 其中, 所述集成包括以重叠或脏纸编 码的方式进行集成。
6、根据权利要求 5所述的方法, 还包括重新调度在所述集成时间块内发送的单 播业务的步骤。
7、 根据权利要求 6所述的方法, 其中, 所述重新调度在所述集成时间块内发送 的单播业务包括:
若与所述在集成时间块中发送的单播业务相关联的 UE中, 存在需要增加发射 功率的 UE,将所述需要增加发射功率的 UE从所述集成候选组中移除,并将与所述需 要增加发射功率的 UE相关联的单播业务调度到所述 TDM时间块中; 根据所述预先设定的规则从所述集成候选组中选择其相关联的单播业务未与
MBMS业务集成的 UE, 调度其相关联的单播业务并将所述相关联的单播业务与所述 要在集成时间块中发送的 MBMS业务集成。
8、 根据权利要求 7所述的方法, 还包括:
若所述集成候选组中不存在其相关联的单播业务未与 MBMS业务集成的 UE, 根据 UE反馈的关于信道状态的测量报告, 选择新的 UE加入所述集成候选组。
9、 一种网络中的传输设备, 包括:
资源划分单元(210), 用于将服务小区的时间资源划分为用于单播业务和多媒 体广播组播 (MBMS ) 业务集成的集成时间块和用于以时分复用 (TDM) 方式进行 单播业务和 MBMS业务传输的 TDM时间块;
功率限制单元 (220), 用于对在资源划分单元 (210) 所划分的集成时间块中 发送的单播业务的发射功率进行限制以使所述单播业务的覆盖范围小于相同集成时 间块中发送的 MBMS业务的覆盖范围。
10、 根据权利要求 9所述的传输设备, 还包括:
调度单元(230), 用于基于移动终端反馈的测量报告调度在所述功率限制单元
(220) 中发射功率受到限制的单播业务。
11、 根据权利要求 10所述的传输设备, 还包括- 重调度单元(240), 用于基于所述移动终端的测量报告重新调度在所述功率限 制单元 (220) 中发射功率受到限制的单播业务。
12、 一种移动终端, 包括:
收发单元(310), 用于接收进行单播业务和多媒体广播组播(MBMS )业务集 成的指示, 其中, 所述单播业务的发射功率受到限制, 并与所述 MBMS业务集成在 用于单播业务和 MBMS业务集成的集成时间块中以被传输, 所述收发单元(310)还 用于接收业务调度信息, 以便在正确的时-频资源接收所述进行了集成的单播业务和 MBMS业务;
实施单元 (320), 用于根据所述收发单元 (310) 接收到的所述指示和所述业 务调度信息对所述进行了集成的单播业务和 MBMS业务进行解码操作。
13、 根据权利要求 12所述的移动终端, 还包括: 测量上报单元(330), 用于通 过所述收发单元(310)上报关于信道状态的测量报告, 以使得能够基于所述测量报 告调度或重新调度所述发射功率受到限制的单播业务。
14、一种用于单播业务和多媒体广播组播业务集成的系统, 包括根据权利要求 9至 1 1之一所述的传输设备以及根据权利要求 12或 13之一所述的移动终端。
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