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WO2010124421A1 - 在mbsfn中对mbms服务进行复用的方法、bm-sc和基站 - Google Patents

在mbsfn中对mbms服务进行复用的方法、bm-sc和基站 Download PDF

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Publication number
WO2010124421A1
WO2010124421A1 PCT/CN2009/000472 CN2009000472W WO2010124421A1 WO 2010124421 A1 WO2010124421 A1 WO 2010124421A1 CN 2009000472 W CN2009000472 W CN 2009000472W WO 2010124421 A1 WO2010124421 A1 WO 2010124421A1
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WO
WIPO (PCT)
Prior art keywords
packet data
mbms
mbms service
service
multiplexed
Prior art date
Application number
PCT/CN2009/000472
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English (en)
French (fr)
Inventor
陈宇
王河
Original Assignee
上海贝尔股份有限公司
阿尔卡特朗讯
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to RU2011141588/08A priority Critical patent/RU2483473C1/ru
Priority to JP2012507564A priority patent/JP5349682B2/ja
Priority to EP09843833.6A priority patent/EP2426958B1/en
Priority to KR1020117025501A priority patent/KR101499492B1/ko
Priority to PCT/CN2009/000472 priority patent/WO2010124421A1/zh
Priority to CN2009801574284A priority patent/CN102326421A/zh
Priority to BRPI0925349-1A priority patent/BRPI0925349A2/pt
Priority to US13/318,074 priority patent/US8942154B2/en
Publication of WO2010124421A1 publication Critical patent/WO2010124421A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H04W36/385—Reselection control by fixed network equipment of the core network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365—Multiplexing of several video streams
    • H04N21/23655—Statistical multiplexing, e.g. by controlling the encoder to alter its bitrate to optimize the bandwidth utilization
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
    • H04N21/6473—Monitoring network processes errors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements

Definitions

  • the present invention relates to the field of wireless communications. More specifically, the present invention relates to a method for multiplexing a plurality of MBMS (Multimedia Broadcast Multicast Service) services in an MBSFN (Multicast Broadcast Single Frequency Network), a BM-SC (Broadcast Multicast Service Center), and a base station, capable of When multiple MBMS services are multiplexed in the MBSFN network, centralized management of resource allocation is realized, which is convenient for meeting the synchronization requirements of MBSFN transmission.
  • MBSFN Multicast Broadcast Single Frequency Network
  • BM-SC Broadcast Multicast Service Center
  • MBSFN Multicast Broadcast Single Frequency Network
  • eMBMS Enhanced Multimedia Broadcast Multicast Service
  • MBSFN transmission requires some coordination between multiple involved eNBs (base stations), including resource allocation, radio configuration and scheduling.
  • service multiplexing is also supported in version 9 of eMBMS, taking into account the gain in radio resource efficiency.
  • the applicant of the present application has proposed to divide the MBMS service for MBSFN transmission into two types.
  • One type is statistical multiplexing service; the other type is non-statistical multiplexing service.
  • Those services with the same QoS requirements of BLER (Block Error Rate) (eg, with the same modulation coding scheme) can be multiplexed into one MAC PDU (Media Access Control - Protocol Data Unit). This is called statistical multiplexing. All services multiplexed into one MAC PDU are defined as one service group. This is the general idea of statistical multiplexing proposed by the applicant and has been agreed by 3GPP (3rd Generation Partnership Project).
  • An object of the present invention is to provide a method for multiplexing multiple MBMS services in an MBSFN, a BM-SC, and a base station, which can implement centralized management of resource allocation when multiplexing multiple MBMS services in an MBSFN network. It is convenient to meet the synchronization requirements of MBSFN transmission.
  • a multimedia broadcast group in a multicast/multicast single frequency network MBSFN is proposed
  • the method for multiplexing the broadcast service MBMS service includes: determining, at the beginning of the session, the MBMS service to be multiplexed together by the broadcast multicast service center BM-SC; omitting the MBMS service by the BM-SC Required bandwidth requirements, and notifying the MBMS Coordination Entity MCE to allocate radio resources by the MCE; BM-SC from the server to collect packet data for the MBMS service to be multiplexed together; When the actual bandwidth occupied by the packet data of the MBMS service exceeds the bandwidth requirement, the BM-SC prioritizes the MBMS services to be multiplexed together; according to the result of the prioritization, by the BM-SC pair Sorting the packet data of the MBMS service to be multiplexed together, and notifying the result of the sorting process to each base station in the MBSFN area; and each base station is allocated by the MCE according to the sort
  • the MBMS service to be multiplexed together is determined by the BM-SC according to the quality of service QoS requirement of the error rate of the MBMS service.
  • the bandwidth requirement is determined by the BM-SC according to a quality of service QoS requirement of a transmission rate or a bit error rate of the MBMS service, and the prioritization is performed by the BM-SC according to the MBMS service. Rate of service or bit error rate quality of service QoS requirements to perform.
  • the sorting process is to arrange the packet data of the high priority MBMS service in front of the packet data of the low priority MBMS service, so that the packet data of the high priority MBMS service is transmitted earlier.
  • the ranking processing result is notified by the content synchronization entity in the BM-SC to the opposite content synchronization entity in the base station.
  • a broadcast multicast service center BM-SC for multiplexing a plurality of multimedia broadcast multicast service MBMS services in a multicast broadcast single frequency network MBSFN
  • the BM-SC includes Determining means for determining an MBMS service to be multiplexed together at the beginning of the session; estimating means for estimating a bandwidth requirement required to multiplex the MBMS service together, and notifying the bandwidth request
  • the MBMS coordination entity MCE to allocate radio resources by the MCE; receiving means for receiving packet data for the MBMS service to be multiplexed from the server; prioritizing means, if packet data for the MBMS service to be multiplexed together
  • the MBMS service to be multiplexed is prioritized when the actual bandwidth occupied exceeds the bandwidth requirement; and the sorting processing device is configured to serve the MBMS to be multiplexed according to the result of the prioritization
  • the packet data is sorted, and the result of the sorting process is notified to each base station in the M
  • a base station for multiplexing a plurality of multimedia broadcast multicast service MBMS services in a multicast broadcast single frequency network MBSFN includes: a sorting processing result receiving apparatus, received by a sorting processing result of packet data notified to the MBMS service to be multiplexed by the BM-SC; a multiplexing device, based on the received sorting processing result for the packet data of the MBMS service to be multiplexed together, The packet data for the MBMS service to be multiplexed together is multiplexed on the allocated radio resources; and the transmitting means is configured to transmit the multiplexed packet data.
  • FIG. 1 is a system structural diagram of distributed management of resource allocation when multiplexing MBMS services
  • FIG. 2 is a structural diagram of a system for centrally managing resource allocation when multiplexing MBMS services according to the present invention
  • FIG. 3 is a flow diagram of a method of multiplexing a plurality of MBMS services in MBSFN in accordance with the present invention
  • FIG. 4 is a structural block diagram of a BM-SC for implementing multiplexing of a plurality of MBMS services in MBSFN according to the present invention
  • FIG. 5 is a block diagram showing the structure of an eNB that implements multiplexing of multiple MBMS services in MBSFN in accordance with the present invention. detailed description
  • Figure 1 is a system structure diagram for distributed management of resource allocation when multiplexing MBMS services.
  • packet ordering and resource scheduling are performed locally by an eNB (base station).
  • the network structure shown in Figure 1 includes a BM-SC, a GW (Gateway), an eNB, and an MCE (MBMS Coordination Entity).
  • the BM-SC only manages session start/stop/update signaling.
  • the MCE allocates radio resources based on the O&M (Operation and Maintenance) configuration.
  • each MBMS service to be multiplexed needs to be prioritized, which is performed by the MCE.
  • priority information is sent by the BM-SC in QCI (Quality Control Information).
  • QCI Quality Control Information
  • the MCE indicates to the eNB that the MBMS service of the priority is transmitted earlier than the MBMS service of the lower priority. Therefore, data of a low priority MBMS service can be discarded.
  • the eNB determines the priority of each MBMS service according to the indication from the MCE in a distributed but synchronous manner ("Priority Enhancement" as shown in Figure 1). Therefore, in this distributed scheme, packet data of a MBMS service having a low priority is discarded in the eNB.
  • the packet data of these MBMS services are transmitted from the GW to the eNB via the multicast network. Packet data for different MBMS services can be reached arbitrarily.
  • packet data for these MBMS services are transmitted on a cycle-by-cycle basis (for example, in a cycle of 320 ms), and packet data of these MBMS services are sorted, so that all packets for the MBMS service 1 having the highest priority are transmitted first. Next is all the packets of the second highest priority MBMS service 2, and so on.
  • the eNB dynamically schedules radio resources, and the eNB indicates to the UE (mobile station) how many MBMS service 1 packets are transmitted and how many MBMS services 2 packets are transmitted. This is achieved in a distributed manner within the eNB.
  • the result of this dynamic scheduling is based on the calculation by the eNB of the number of packets buffered for each MBMS service to be multiplexed, and the calculated number is converted to the number of subframes required to transmit these packets.
  • FIG. 2 is a system configuration diagram for centrally managing resource allocation when multiplexing MBMS services in accordance with the present invention.
  • the network structure shown in FIG. 2 also includes BM-SC, GW, eNB, and MCE, similar to FIG.
  • centralized management by BM-SC includes content synchronization, packet sorting and a part Sub-resource allocation, which is different from the distributed management shown in Figure 1.
  • 3 is a flow diagram of a method of multiplexing a plurality of MBMS services in an MBSFN in accordance with the present invention.
  • the BM-SC determines the MBMS services to be multiplexed together, ie, determines which MBMS services to multiplex together, which may be based on the error rate of the MBMS service (eg, block error rate). Wait for QoS (Quality of Service) requirements to determine.
  • QoS Quality of Service
  • the bandwidth requirements required to multiplex the MBMS services together are estimated by the BM-SC, and the bandwidth requirements are notified to the MCE to allocate radio resources by the MCE.
  • the bandwidth requirement can be determined by the BM-SC according to quality of service QoS requirements such as the transmission rate or bit error rate of each MBMS service.
  • the packet data for the MBMS service to be multiplexed is received by the BM-SC from the server, and the packet data of the received MBMS service is buffered, for example, in a cycle of 320 ms.
  • step 307 if the actual bandwidth occupied by the packet data of the MBMS service to be multiplexed exceeds the bandwidth requirement, for example, the actual bandwidth occupied by the buffered data exceeds the bandwidth requirement, the BM-SC
  • the multiplexed MBMS services are prioritized.
  • the prioritization is performed by the BM-SC according to QoS requirements such as a transmission rate or a bit error rate of each MBMS service.
  • the packet data for the MBMS service to be multiplexed together is sorted by the BM-SC, and the result of the sorting processing is notified to each base station in the MBSFN area.
  • the BM-SC sorts packets for each MBMS service in a buffer, for example, adding numbers 1 to N1 to packets for the highest priority MBMS service 1; and serving to the second highest priority MBMS service 2
  • the grouping adds the sequence number (N1+1) ⁇ (N1+N2); and so on.
  • the sorting result of the packet may be delivered by the content synchronization entity of the BM-SC to the counterpart content synchronization entity of the eNB.
  • each base station compares the packet processing data for the MBMS service to be multiplexed on the radio resources allocated by the MCE according to the sorting processing result notified by the BM-SC (for example, the sequence number added to each packet).
  • the multiplexed packet data is multiplexed and transmitted.
  • FIG. 4 is a structural block diagram of a BM-SC that implements multiplexing of a plurality of MBMS services in an MBSFN according to the present invention.
  • the BM-SC includes: a determining means 401, an estimating means 403, a receiving means 405, a prioritizing means 407, and sorting means 409.
  • the determining means 401 determines the MBMS service to be multiplexed together at the beginning of the session.
  • the estimating means 403 estimates the bandwidth requirements required to multiplex the MBMS services together and notifies the MCE of the bandwidth requirements to allocate radio resources by the MCE.
  • the receiving device 405 receives packet data for the MBMS service to be multiplexed from the server.
  • FIG. 5 is a block diagram showing the structure of an eNB that implements multiplexing of multiple MBMS services in MBSFN in accordance with the present invention.
  • the base station includes: a sort processing result receiving means 501, a multiplexing means 503, and a transmitting means 505.
  • the sort processing result receiving means 501 receives the sort processing result of the packet data notified by the BM-SC for the MBMS service to be multiplexed together.
  • the multiplexing means 503 multiplexes the packet data of the MBMS service to be multiplexed together on the allocated radio resources based on the received sorting processing result for the packet data of the MBMS service to be multiplexed.
  • the transmitting device 505 transmits the multiplexed packet data.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Description

在 MBSFN中对 MBMS服各迸行复用的方法、 BM-SC和基站 技术领域
本发明涉及无线通信领域。 更具体地， 涉及一种在 MBSFN (组播广播单频 网） 中对多个 MBMS (多媒体广播组播业务） 服务进行复用的方法、 BM-SC (广 播组播服务中心）和基站， 能够在 MBSFN网络中对多个 MBMS服务进行复用时实 现对资源分配的集中管理， 便于满足 MBSFN传输的同步要求。 背景技术 '
如所已知的， 针对 eMBMS (增强的多媒体广播组播业务） 的 MBSFN (组播 广播单频网） 传输被协商为 eMBMS的版本 9的基本特征。 为了进行有效和正确的 MBSFN传输， 需要利用相同无线资源同时地在空中传输相同的内容数据分组。 清楚的是， MBSFN传输需要在多个所涉及的 eNB (基站）之间的一些协调， 包括 资源分配、无线电配置和调度。另一方面，考虑到无线资源效率的增益，在 eMBMS 的版本 9中还支持服务复用。
这里， 需要指出的是， 本申请的 Ψ请人已经提出了将用于 MBSFN传输的 MBMS服务分为两种类型。 一种类型是统计复用服务； 另一种类型是非统计复用 服务。具有 BLER (块差错率）的相同 QoS要求（例如， 具有相同的调制编码方案） 的那些服务可以被复用为一个 MAC PDU (介质接入控制 -协议数据单元）。这被称 为统计复用。 复用到一个 MAC PDU中的所有服务被定义为一个服务组。 这是本 申请人所提出的统计复用的一般思想，并且已经由 3GPP (第三代伙伴计划）同意。
但是， 现有技术中仅提出了对 MBMS服务进行复用的一般性描述， 而未考 虑如何对 MBMS服务进行复用的具体细节。 发明内容
为了克服现有技术的缺陷提出了本发明。 本发明的目的是提出一种在 MBSFN中对多个 MBMS服务进行复用的方法、 BM-SC和基站， 能够在 MBSFN网 络中对多个 MBMS服务进行复用时实现对资源分配的集中管理，便于满足 MBSFN 传输的同步要求。
根据本发明， 提出了一种在组播/ ^播单频网 MBSFN中对多个多媒体广播组 播业务 MBMS服务进行复用的方法， 包括： 在会话开始时， 由广播组播服务中心 BM-SC确定要复用在一起的 MBMS服务； 由 BM-SC估计将所述 MBMS服务复用在 一起所需的带宽要求， 并将所述带宽要求通知给 MBMS协调实体 MCE以由 MCE 分配无线资源； 由 BM-SC从服务器璋收针对要复用 一起的 MBMS服务的分组数 据； 如果针对要复用在一起的 MBMS服务的分组数据所占用的实际带宽超过所述 带宽要求， 则由 BM-SC对要复用在一起的 MBMS服务进行优先级化； 根据优先级 化的结果， 由 BM-SC对针对要复用在一起的 MBMS服务的分组数据进行排序处 理， 并将排序处理结果通知给 MBSFN区域内的各个基站； 以及各个基站根据由 BM-SC所通知的排序处理结果，在由 MCE所分配的无线资源上对针对要复用在一 起的 MBMS服务的分组数据进行复用并传送复用后的分组数据。
优选地， 所述要复用在一起的 MBMS服务是由 BM-SC根据所述 MBMS服务 • 的误码率的服务质量 QoS要求来确定。
优选地， 所述带宽要求是由 BM-SC根据所述 MBMS服务的传输速率或误码 率的服务质量 QoS要求来确定， 并且所述优先级化是由 BM-SC根据所述 MBMS服 务的传输速率或误码率的服务质量 QoS要求来执行的。
优选地， 所述排序处理是将高优先级的 MBMS服务的分组数据排列在低优 先级的 MBMS服务的分组数据的前面， 以使高优先级的 MBMS服务的分组数据更 早地被传送。
优选地， 所述排序处理结果由 BM-SC中的内容同步实体通知给基站中的对 方内容同步实体。
此外， 根据本发明， 还提出了一种在组播广播单频网 MBSFN中实现对多个 多媒体广播组播业务 MBMS服务进行复用的广播组播服务中心 BM-SC , 所述 BM-SC包括： 确定装置， 用于在会话开始时， 确定要复用在一起的 MBMS服务； 估计装置， 用于估计将所述 MBMS服务复用在一起所需的带宽要求， 并将所述带 宽要求通知给 MBMS协调实体 MCE以由 MCE分配无线资源； 接收装置， 用于从服 务器接收针对要复用在一起的 MBMS服务的分组数据； 优先级化装置， 如果针对 要复用在一起的 MBMS服务的分组数据所占用的实际带宽超过所述带宽要求， 则 对要复用在一起的 MBMS服务进行优先级化； 以及排序处理装置， 用于根据优先 级化的结果， 对针对要复用在一起的 MBMS服务的分组数据进行排序处理， 并将 排序处理结果通知给 MBSFN区域内的各个基站。 另外， 根据本发明， 还提出了一种在组播广播单频网 MBSFN中实现对多个 多媒体广播组播业务 MBMS服务进行复用的基站， 所述基站包括： 排序处理结果 接收装置，接收由 BM-SC所通知的针对要复用在一起的 MBMS服务的分组数据的 排序处理结果； 复用装置， 根据所接收到的针对要复用在一起的 MBMS服务的分 组数据的排序处理结果， 在所分配的无线资源上对针对要复用在一起的 MBMS服 务的分组数据进行复用； 以及传送装置， 用于传送复用后的分组数据。 附图说明
通过参考以下结合附图对所采用的优选实施例的详细描述， 本发明的上述 目的、 优点和特征将变得显而易见， 其中；
图 1是在对 MBMS服务进行复用时对资源分配进行分布式管理的系统结构 图；
图 2是根据本发明的在对 MBMS服务进行复用时对资源分配进行集中管理 的系统结构图； '
图 3是根据本发明的在 MBSFN中对多个 MBMS服务进行复用的方法的流程 图；
图 4是根据本发明的在 MBSFN中实现对多个 MBMS服务进行复用的 BM-SC 的结构框图； 以及
图 5是根据本发明的在 MBSFN中实现对多个 MBMS服务进行复用的 eNB的 结构框图。 具体实施方式
图 1是在对 MBMS服务进行复用时对资源分配进行分布式管理的系统结构 图。 在分布式管理中， 由 eNB (基站） 中本地进行分组排序和资源调度。
如图 1所示的网络结构包括 BM-SC、 GW (网关）、 eNB和 MCE (MBMS协调 实体）。
在如图 1所示的系统中需要使用： 内容同步算法、 一部分资源分配信令、 分 组排序算法、 以及动态调度信令。
在图 1所示的系统中对 MBMS服务进行复用的基本过程如下：
1 ) 来自 BM-SC的分组通过内容同步实体来确保在 MBSFN区域的不同 eNB 处的数据得到同步。
2) BM-SC仅管理会话开始 /停止 /更新信令。
3 ) MCE根据 0&M (运行和维护） 配置来分配无线资源。
4) 当在有限的资源上对 MBMS服务进行复用时， 需要对要复用的各 MBMS 服务进行优先级化， 这由 MCE来执行。
例如， 由 BM-SC在 QCI (质量控制信息） 中发送优先级信息。 当 MCE接收 到该优先级信息时， 该 MCE向 eNB指示将髙优先级的 MBMS服务比低优先级的 MBMS服务更早地传送。 因此， 可以丢弃具有低优先级的 MBMS服务的数据。
5 ) eNB以分布式但同步的方式， 根据来自 MCE的指示， 实现对各 MBMS服 务优先级判定 （如图 1所示的 "优先级增强"）。 因此， 在该分布式方案中， 在 eNB 中丢弃具有低优先级的 MBMS服务的分组数据。
6)经由组播网络从 GW向 eNB传送这些 MBMS服务的分组数据。不同 MBMS 服务的分组数据可以任意地到达。 在 eNB中， 逐周期地 （例如， 以 320ms为周期） 传送针对这些 MBMS服务的分组数据， 对这些 MBMS服务的分组数据进行排序， 从而首先传送针对具有最高优先级的 MBMS服务 1的所有分组， 接下来是具有次 高优先级的 MBMS服务 2的所有分组， 依次类推。
7) eNB对无线资源进行动态调度， 并且 eNB向 UE (移动台） 指示传送了多 少 MBMS服务 1的分组、 多少 MBMS服务 2的分组。 这在 eNB内由分布式方式来实 现。
该动态调度的结果基于由 eNB对针对要复用的各 MBMS服务所缓冲的分组 的数量的计算， 并且将该计算的数量转换为传送这些分组所需的子帧的数量。
该分布式管理的特点是 BM-SC所实现的功能较为简单， 但是该分布式管理 引入了较大的复杂度， 因为大部分管理功能必须分布在许多节点中， 同时还要确 保同步行为。 下面将结合附图来解释本发明的优选实施例。
图 2是根据本发明的在对 MBMS服务进行复用时对资源分配进行集中管理 的系统结构图。
图 2所示的网络结构也包括 BM-SC、 GW、 eNB和 MCE, 类似于图 1。 但是， 在图 2所示的系统中， 由 BM-SC进行集中管理， 包括内容同步、 分组排序和一部 分资源分配， 这不同于图 1所示的分布式管理。 图 3是根据本发明的在 MBSFN中对多个 MBMS服务进行复用的方法的流程 图。 ，
下面将结合图 2和图 3来描述在 MBSFN中对多个 MBMS服务进行复用的方 法。
在步骤 301， 在会话开始时， 由 BM-SC确定要复用在一起的 MBMS服务， 即 确定要将哪些 MBMS服务复用在一起， 这可以根据 MBMS服务的误码率 （例如块 差错率） 等 QoS (服务质量） 要求来确定。
在步骤 303， 由 BM-SC估计将所述 MBMS服务复用在一起所需的带宽要求， 并将所述带宽要求通知给 MCE以由 MCE分配无线资源。这里， 该带宽要求可以由 BM-SC根据各 MBMS服务的传输速率或误码率等服务质量 QoS要求来确定。
在步骤 305， 由 BM-SC从服务器接收针对要复用在一起的 MBMS服务的分组 数据， 并对接收到的 MBMS服务的分组数据进行缓冲， 例如以 320ms为周期来进 行缓冲。
在步骤 307， 如果针对要复用在一起的 MBMS服务的分组数据所占用的实际 带宽超过该带宽要求， 例如， 所缓冲的数据所占用的实际带宽超过该带宽要求， 则由 BM-SC对要复用在一起的 MBMS服务进行优先级化。 这里， 该优先级化是由 BM-SC根据各 MBMS服务的传输速率或误码率等 QoS要求来执行的。
在步骤 309， 根据优先级化的结果， 由 BM-SC对针对要复用在一起的 MBMS 服务的分组数据进行排序处理， 并将排序处理结果通知给 MBSFN区域内的各个 基站。 例如， 该 BM-SC在缓冲器中对针对各 MBMS服务的分组进行排序， 例如， 向针对最高优先级的 MBMS服务 1的分组添加序号 1〜N1 ;并且向针对次高优先级 的 MBMS服务 2的分组添加序号 （N1+1 ) 〜 （N1+N2); 依次类推。 分组的排序处 理结果可以由 BM-SC的内容同步实体传递到 eNB的对方内容同步实体。
在步骤 311， 各个基站根据由 BM-SC所通知的排序处理结果 （例如添加到各 分组上的序号〉， 在由 MCE所分配的无线资源上对针对要复用在一起的 MBMS服 务的分组数据进行复用并传送复用后的分组数据。
根据本发明， 由于在对多个 MBMS服务进行复用时由 BM-SC对资源分配进 行集中管理， 便于满足 MBSFN传输的同步要求。 图 4是根据本发明的在 MBSFN中实现对多个 MBMS服务进行复用的 BM-SC 的结构框图。
如图 4所示， 根据本发明的 BM-SC包括： 确定装置 401、 估计装置 403、 接收 装置 405、 优先级化装置 407和排序处理装置 409。 确定装置 401在会话开始时， 确 定要复用在一起的 MBMS服务。 估计装置 403估计将所述 MBMS服务复用在一起 所需的带宽要求， 并将所述带宽要求通知给 MCE以由 MCE分配无线资源。接收装 置 405从服务器接收针对要复用在一起的 MBMS服务的分组数据。 如果针对要复 用在一起的 MBMS服务的分组数据所占用的实际带宽超过所述带宽要求， 则优先 级化装置 407对要复用在一起的 MBMS服务进行优先级化。 排序处理装置 409根据 优先级化的结果， 对针对要复用在一起的 MBMS服务的分组数据进行排序处理， 并将排序处理结果通知给 MBSFN区域内的各个基站。 图 5是根据本发明的在 MBSFN中实现对多个 MBMS服务进行复用的 eNB的 结构框图。
根据本发明的基站包括： 排序处理结果接收装置 501、 复用装置 503和传送 装置 505。排序处理结果接收装置 501接收由 BM-SC所通知的针对要复用在一起的 MBMS服务的分组数据的排序处理结果。 复用装置 503根据所接收到的针对要复 用在一起的 MBMS服务的分组数据的排序处理结果， 在所分配的无线资源上对针 对要复用在一起的 MBMS服务的分组数据进行复用。 传送装置 505传送复用后的 分组数据。 尽管以上已经结合本发明的优选实施例示出了本发明， 但是本领域的技术 人员将会理解， 在不脱离本发明的精神和范围的情况下， 可以对本发明进行各种 修改、 替换和改变。 因此， 本发明不应由上述实施例来限定， 而应由所附权利要 求及其等价物来限定。

Claims

1、一种在组播广播单频网 MBSFN中对多个多媒体广播组播业务 MBMS服务 进行复用的方法， 包括：
在会话开始时， 由广播组播服务中心 BM-SC确定要复用在一起的 MBMS服 务；
由 BM-SC估计将所述 MBMS服务复用在一起所需的带宽要求， 并将所述带 宽要求通知给 MBMS协调实体 M权CE以由 MCE分配无线资源；
由 BM-SC从服务器接收针对要复用在一起的 MBMS服务的分组数据； 如果针对要复用在一起的 MBMS服务的分组数据所占用的实际带宽超过所 述带宽要求， 则由 BM-SC对要复用在一起的 MBMS服务进行优先级化；
根据优先级化的结果， 由 BM-SC对针对要求复用在一起的 MBMS服务的分组 数据进行排序处理， 并将排序处理结果通知给 MBSFN区域内的各个基站； 以及 各个基站根据由 BM-SC所通知的排序处理结果， 在由 MCE所分配的无线资 源上对针对要复用在一起的 MBMS服务的分组数据进行复用并传送复用后的分 组数据。
2、 根据权利要求 1所述的方法， 其中所述要复用在一起的 MBMS服务是由 BM-SC根据所述 MBMS服务的误码率的服务质量 QoS要求来确定。
3、 根据权利要求 1所述的方法， 其中所述带宽要求是由 BM-SC根据所述 MBMS服务的传输速率或误码率的服务质量 QoS要求来确定， 并且所述优先级化 是由 BM-SC根据所述 MBMS服务的传输速率或误码率的服务质量 QoS要求来执行 的。
4、 根据权利要求 1所述的方法， 其中所述排序处理是将高优先级的 MBMS 服务的分组数据排列在低优先级的 MBMS服务的分组数据的前面， 以使髙优先级 的 MBMS服务的分组数据更早地被传送。
5、 根据权利要求 1所述的方法， 其中所述排序处理结果由 BM-SC中的内容 同步实体通知给基站中的对方内容同步实体。
6、一种在组播广播单频网 MBSFN中实现对多个多媒体广播组播业务 MBMS 服务进行复用的广播组播服务中心 BM-SC, 所述 BM-SC包括：
确定装置， 用于在会话开始时， 确定要复用在一起的 MBMS服务； 估计装置， 用于估计将所述 MBMS服务复用在一起所需的带宽要求， 并将 所述带宽要求通知给 MBMS协调实体 MCE以由 MCE分配无线资源；
接收装置， 用于从服务器接收针对要复用在一起的 MBMS服务的分组数据； 优先级化装置， 如果针对要复用在一起的 MBMS服务的分组数据所占用的 实际带宽超过所述带宽要求， 则对要复用在一起的 MBMS服务进行优先级化； 以 及
排序处理装置， 用于根据优先级化的结果， 对针对要复用在一起的 MBMS 服务的分组数据进行排序处理， 并将排序处理结果通知给 MBSFN区域内的各个 基站。
7、一种在组播广播单频网 MBSFN中实现对多个多媒体广播组播业务 MBMS 服务进行复用的基站， 所述基站包括. - 排序处理结果接收装置， 接收由广播组播服务中心 BM-SC所通知的针对要 复用在一起的 MBMS服务的分组数据的排序处理结果；
复用装置， 根据所接收到的针对要复用在一起的 MBMS服务的分组数据的 排序处理结果， 在所分配的无线资源上对针对要复用在一起的 MBMS服务的分组 数据进行复用； 以及
传送装置， 用于传送复用后的分组数据。
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