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WO2008031362A1 - Réseau support, système, dispositif et procédé de service de diffusion multidiffusion - Google Patents

Réseau support, système, dispositif et procédé de service de diffusion multidiffusion Download PDF

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Publication number
WO2008031362A1
WO2008031362A1 PCT/CN2007/070680 CN2007070680W WO2008031362A1 WO 2008031362 A1 WO2008031362 A1 WO 2008031362A1 CN 2007070680 W CN2007070680 W CN 2007070680W WO 2008031362 A1 WO2008031362 A1 WO 2008031362A1
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WO
WIPO (PCT)
Prior art keywords
service
multicast
multicast broadcast
network
broadcast service
Prior art date
Application number
PCT/CN2007/070680
Other languages
English (en)
French (fr)
Inventor
Liang Gu
Jianjun Wu
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008031362A1 publication Critical patent/WO2008031362A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a multicast broadcast technology in a WiMAX network. Background technique
  • WiMAX Worldwide Interoperability for Microwave Access
  • MS Mobile Station
  • Sc Subscriber Station
  • ASN Access Service Network
  • CSN Connection Service Network
  • the ASN is defined as a network function set for providing a wireless access service for a WiMAX user terminal.
  • the ASN includes a base station (Base Station, referred to as "BS") and an ASN GateWay (ASN GateWay, ASN-GW) network element,
  • the ASN may be shared by multiple CSNs.
  • the main functions of the ASN include the functions of the BS and the functions of the ASN-GW.
  • the functions of the BS are: providing L2 connection of BS and subscriber station SS/MS, radio resource management, measurement and power control, and compression and encryption of air interface data.
  • the functions of ASN-GW include: proxy function for SS/MS authentication, authorization and accounting functions; network discovery and selection for NSP; relay function for providing L3 information for SS, such as IP address allocation .
  • CSN is defined to provide IP connection services for WiMAX user terminals.
  • the CSN mainly provides the following functions: IP address allocation of SS/MS, Internet access, Authentication, Authorization, Account (“AAA”) proxy or server, user-based authorization control, ASN to CSN Tunnels, billing for WiMAX subscribers, and settlement between operators, tunneling between CSNs in roaming, switching between ASNs, and various WiMAX services (such as location-based services, multimedia multicast and broadcast services, IP Multimedia Subsystem Service).
  • AAA Authentication, Authorization, Account
  • the MS/SS is a user equipment, and the user uses the device to access the WiMAX network.
  • the usual communication is communication between one node and another, but with the user's needs
  • the increase, as well as the introduction of multiple media, requires new transmission modes, ie, one-to-many points may also include multi-point to multi-point communication.
  • it is also desirable to meet the resource utilization effectiveness of the communication that is, the reuse of some key communication resources, such as the bandwidth of the air interface, the connection identifier.
  • broadcast and multicast are technologies that transfer data from one data source to multiple targets.
  • the above MBS provides a specification for transmitting data from one data source to multiple users in a mobile network, thereby realizing network resource sharing and improving the utilization of network resources, especially the utilization of air interface resources.
  • the above MBS can not only realize multicast and broadcast of plain text and low-rate message services, but also realize multicast and broadcast of high-speed multimedia services, for example, video on demand, television broadcast, video conference, online education. , interactive games, and more.
  • the prior art protocol supports the MBS signaling and data transmission over the air interface.
  • the MBS transmission mode can be divided into a single BS mode and a multiple BS mode, and the concept of the MBS domain is defined in the multi-BS mode.
  • the so-called MBS domain is a collection of BSs.
  • the BS in this set must satisfy one condition: the Multicast Connection Identifier ("MCID") and the Security Association ("Security Association”) used when sending MBS data. SA" ) must be consistent.
  • MID Multicast Connection Identifier
  • SA Security Association
  • the prior art does not describe the single BS mode in detail; however, in the multi-BS mode, how the BS transmits MBS data, how the MS receives the MBS data, and how the BS informs the MBS data that the MS is interested in has a corresponding description.
  • the downlink mapping message (DL-MAP, Downlink MAP) broadcasted on the broadcast CID includes zero to one or more multicast broadcast service mapping information (MBS-MAP-IE, Multicast Broadcast Service MAP Information Element), MBS- Each item on the MAP-IE is identified by an MBS domain ID.
  • MBS-MAP-IE Multicast Broadcast Service MAP Information Element
  • an MBS-MAP-IE identifies the physical resource of a multicast broadcast service map (MBS-MAP, Multicast Broadcast MAP) message on the air interface; if it is a single BS mode, it directly indicates the physical resource of the MBS.
  • MBS-MAP multicast broadcast service map
  • an MBS-MAP message can contain zero to one or more multicast broadcast service data messages.
  • MBS-DATA-IE the physical parameters between these MBS-DATA-IEs can be consistent or inconsistent, determined by the network side; but an MBS-DATA-IE has only one physical parameter set.
  • one MBS-DATA-IE contains one or more MCIDs; the reason why one MBS-DATA-IE is required to contain one or more MCIDs is to reduce the MBS-MAP message length and consider the same downlink coding.
  • the MCID corresponding to the MBS data of the DIUC is indicated in an MBS-DATA-IE.
  • the same MAC-PDU (Medium Access Control- Protocol Data Unit) of the DIUC is placed on one physical resource, although the data of different MBS is in the physical resource. Mixed together, but can be distinguished on the MAC layer by the MCID on the MAC-PDU header. Not all MCIDs correspond to the same MBS, but each MCID corresponds to one MBS.
  • an MCID also contains one or more logical channel IDs.
  • the logical channel ID is used in the air interface to inform the MS of the currently indicated MBS data whether it has content of interest.
  • the downlink channel descriptor (DCD, Downlink Channel Descriptor) can carry zero to one or more MBS domain IDs.
  • the multicast broadcast service content identifier (MBS Content ID) corresponds to the group information of the MCID and the logical channel ID.
  • the upper layer data stream carried by the WiMAX access network service flow (Service Flow, referred to as "SF") or the access network data path ("DP") is identified by the multicast broadcast service content identifier.
  • the DL-MAP message indicates the physical resource to be sent by the next MBS-MAP message, but does not distinguish the MCID and the logical channel ID included in the MBS-MAP message; the MBS-DATA-IE also has the physical resource for the next MBS-MAP message.
  • the indication differs from the indication in the DL-MAP in that the MBS-MAP message here is a special MBS-MAP message, which must contain an MBS-DATA-IE, which is owned by the MBS-DATA-IE and the current MBS. -DATA-IE - MCID and logical channel ID. In this way, the terminal does not need to receive the DL-MAP message one by one, and only needs to know the transmission time of the next MBS-MAP message from the current MBS-MAP-IE.
  • the air interface link layer can carry a SF on the network side through a unicast air interface connection (CID) or a multicast air interface connection (MCID);
  • CID unicast air interface connection
  • MCID multicast air interface connection
  • the SF on the network side is identified by the SFID.
  • One SF can carry one or more high-level data streams, and the upper-layer data stream is identified by the Content ID.
  • the prior art only describes how the air interface link layer carries the MBS, and does not provide a complete service bearer scheme from the MBS server to the terminal. That is to say, the prior art does not give a complete technical solution, such as not giving a service from a content service provider, how to be hosted and managed in a WiMAX network, and not giving an object of the existing defined Content ID. Identifies what the object of the MS joins the MBS, what the object is hosted by an air interface connection, and when it carries multiple Content IDs and so on. Different bearer modes correspond to completely different solutions. It can be seen that no specific solution is given in the prior art.
  • the present invention provides a bearer network, system, device and method for a multicast broadcast service, so that a WiMAX network can carry an MBS service.
  • the present invention provides a bearer network for a multicast broadcast service, including:
  • a first bearer network configured to carry each media stream from the content providing network in an IP flow or an IP multicast group in a one-to-one or multiple-to-one manner
  • the access service network is configured to carry each IP stream or IP multicast group from the first bearer network in a service flow or a data channel in a one-to-one or multiple-to-one manner, and send the information to the terminal through an air interface.
  • the present invention also provides a bearer system for a multicast broadcast service, including:
  • the multicast broadcast service server is configured to carry the media streams from the content providing network in an IP flow or an IP multicast group to the at least one multicast broadcast service agent in a one-to-one or multiple-to-one manner;
  • a multicast broadcast service agent for at least one of at least one multicast broadcast service server
  • the IP stream or the IP multicast group is respectively carried in a service flow or a data channel in a one-to-one or many-to-one manner;
  • the invention also provides a multicast broadcast service server, comprising:
  • the invention also provides a multicast broadcast service agent, comprising:
  • the present invention also provides a bearer method for a multicast broadcast service, including:
  • Each media stream from the content providing network is respectively carried in an IP stream or an IP multicast group in a one-to-one or many-to-one manner;
  • Each IP stream or IP multicast group is carried in a service flow or a data channel in a one-to-one or many-to-one manner, and is sent to the terminal through an air interface.
  • the technical solution of the present invention carries each media stream in an IP flow or an IP multicast group in a one-to-one or many-to-one manner in a CSN, and respectively pairs each IP flow or IP multicast group in the ASN.
  • One or many to one ways are carried in the service flow.
  • the MBS service from the content service provider can be successfully carried in the WiMAX network, and the service bearers between the layers have certain independence and independence, and there is no need to modify the existing WiMAX protocol.
  • the present invention provides a specific factor by which a media stream can be carried to an IP stream or an IP multicast group, and an IP stream or an IP multicast group can be carried to the service stream, thereby making the present invention more practical.
  • FIG. 1 is a schematic diagram of a WiMAX network architecture according to the prior art
  • FIG. 2 is a schematic diagram of a bearer network of an MBS according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a bearer system of an MBS according to a second embodiment of the present invention.
  • FIG. 4 is a flow chart of a method for carrying an MBS according to a third embodiment of the present invention.
  • the CSN separates each media stream from the content providing network into one-to-one or many-to-one
  • the mode is carried in the IP stream or IP multicast group and transmitted to the ASN.
  • the ASN carries the IP flows or IP multicast groups from the CSN in the service flow in a one-to-one or many-to-one manner, respectively, through the air interface.
  • the terminal sends.
  • Each layer network may carry different data streams provided by the upper layer network in the same data stream of the layer network, or may carry different data streams provided by the upper layer network in different data streams of the layer network.
  • the specific bearer mode is determined by the network side entity.
  • the first embodiment of the present invention will be described in detail below based on the above principles.
  • the first embodiment of the present invention relates to a bearer network of an MBS, and the network bearer model of the present embodiment is as shown in FIG. 2.
  • a content service provider provides one or more media streams to a CSN, which may represent a specific service or a set of services.
  • the media stream is the basic business object provided by the content service provider to the MBS server (MBS Server).
  • MBS server MBS Server
  • the same media stream can be provided to different CSN networks, and each media stream is provided to at least one CSN.
  • the CSN uses an IP stream or an IP multicast group to carry the media stream provided by the upper layer network, and each IP multicast group includes at least one IP stream.
  • the CSN network can carry different media streams in different IP flows, as shown in Figure 1 and 2; different media streams can also be carried in the same IP stream, as shown in Figure 2 .
  • the IP flow refers to the IP source address, IP destination address, service priority, TOS/DSCP (Type of Service/DiffServ Code Point), protocol type, flow label, and TCP (Transmission) in the IP packet.
  • Control Protocol Transmission Control Protocol
  • UDP User Datagram Protocol
  • the IP stream is provided as a basic service object provided by the CSN network to the ASN network.
  • Each IP stream is sent to at least one ASN and/or MBS domain (such as the MBS zone defined by IEEE 802.16d/e), and the same IP stream can be sent to different Within the ASN network and / or MBS domain.
  • Different IP flows are identified by the MBS Content ID defined by IEEE 802.16d/e.
  • the IP multicast address is assigned by the CSN, and the same IP multicast group can contain one or more IP flows.
  • the Content ID can also be used to identify the multicast group. Since the specific object of the Content ID is clarified, the present embodiment provides another way of identifying the IP multicast group other than the IP multicast address.
  • the CSN can send IP multicasts containing one or more IP flows to different ASN networks through IP multicast routing or tunneling. And / or within the MBS domain.
  • the ASN uses the SF to carry the IP flow or multicast group provided by the upper layer network CSN.
  • the ASN can carry different IP flows or multicast groups in different SFs, as shown in Figure 2; different IP flows or multicast groups can also be carried in the same SF, as shown in Figure 2. Case 2 and Case 3.
  • the SF is the basic service object in the ASN.
  • Each SF is sent to at least one BS in the same ASN and/or MBS domain, and the same SF can be sent to different BSs in the same ASN and/or MBS domain.
  • SFs are identified by the SFID defined by IEEE 802.16d/e.
  • the same SF is carried over the air interface using a CID or MCID, and the same CID or MCID can be sent to a different MS.
  • a CID or MCID When multiple IP flows are carried on one MCID, you need to use the logical channel ID (Logical Channel ID, LCID) for the link layer to distinguish.
  • LCID logical Channel ID
  • An LCID uniquely corresponds to a Content ID on an MCID.
  • the BS can transmit multiple MCIDs on the same physical resource as needed.
  • WiMAX In a WiMAX network, the service bearers between layers have certain independence and independence, and there is no need to modify WiMAX's existing protocols.
  • the IP multicast group provided by the CSN is the basic service object that the terminal joins; when one SF carries multiple IP multicast groups or one multicast group contains multiple IP flows, When an SF includes multiple data streams identified by the Content ID, the network side entity also needs to allocate an LCID for identifying, at the link layer, which upper layer services are currently transmitted by the air interface connection.
  • the IP flow provided by the CSN is the basic service object that the terminal joins; when one SF carries multiple IP flows, the network The side entity also needs to allocate an LCID for identifying which IP flows are currently transmitted by the air interface connection at the link layer.
  • DSA Dynamic Service Flow
  • a second embodiment of the present invention relates to a bearer system of an MBS.
  • an MBS server is configured to carry each media stream from a content providing network in an IP flow or in a one-to-one or many-to-one manner.
  • the MBS proxy is a functional entity for processing MBS signaling for the MS in the ASN network or the MBS domain, and is configured to respectively configure at least one IP flow or IP multicast group from at least one MBS server into one-to-one or multiple
  • the one-to-one mode is carried in the SF
  • the MBS proxy is located in the ASN gateway; the BS is configured to send different SF bearers from the MBS proxy to the terminal in different air interface connections.
  • the illustration shown in FIG. 3 is merely illustrative, indicating a logical structure in which the units displayed as separate components may or may not be physically separated, and the components displayed as units may or may not be physical.
  • Units can be located in one place or distributed to several network units.
  • the MBS proxy can be a logical entity, can be located in a BS or ASN gateway, or can be a physical entity, independent of the BS or ASN gateway.
  • the MBS server is the provider of the MBS.
  • the MBS server receives one or more media streams from one or more content providers.
  • QoS quality of service
  • NSP Network Service Procider
  • the MBS server is also responsible for allocating IP multicast addresses, constructing IP multicast groups, and carrying one or more IP flows on the IP multicast group for transmission.
  • the ASN gateway is an entity within the ASN.
  • the MBS proxy of the ASN gateway receives one or more IP flows or IP multicast groups from one or more MBS servers, and according to MBS planning requirements, MBS domain partitioning, IP flow QoS.
  • the IP stream or IP multicast group is repackaged and carried in the SF or DP and sent to one or more BSs, such as requirements and MBS authentication requirements.
  • the SF is a service flow identified by the SFID
  • the DP is a bearer channel identified by the GRE Key (Generic Routing Encapsulation Key).
  • the MBS authentication request means that when the ASN gateway carries different IP flows on the same SF, it is necessary to consider whether the IP flows are from the same MBS server and have the same MBS Authorization Key (MAS). Only consider can be carried on one SF.
  • MBS planning The request means that when the ASN gateways are carrying different IP flows on the same SF, it is necessary to consider whether the IP flows are from the same MBS server and are required to be broadcasted in the ASN network during service planning, and if it is considered to be bearable on one SF.
  • the BS carries different SFs on different air interface connections. As for whether the BS uses a unicast air interface to connect to a CID or a multicast air interface connection, the MCID is determined by the BS.
  • the BS can carry different air interface link layer connections on the same physical resource according to the coding adjustment manner, and finally send to one or more MSs.
  • the MBS from the content service provider can be smoothly carried in the WiMAX network, and the service bearers between the layers have certain independence and independence, and there is no need to modify the existing WiMAX. protocol.
  • the present embodiment provides a specific factor by which the media stream 7 can be carried to an IP stream or an IP multicast group, and the IP stream or the IP multicast group 7 can be carried to the SF, thereby making the present invention more practical. .
  • a third embodiment of the present invention relates to a method of carrying an MBS, as shown in FIG.
  • the CSN carries each media stream from the content providing network in an IP stream or an IP multicast group in a one-to-one or many-to-one manner.
  • the CSN provides network requirements according to different content, QoS requirements of different media streams, current MBS server and network resource status, and NSP (Network Service Provider) service policy, MBS planning, and the like.
  • the media stream is repackaged and carried in the IP stream and finally delivered to one or more ASN gateways.
  • the ASN carries the IP flows or IP multicast groups from the CSN in the SF or DP in a one-to-one or one-to-one manner, and sends them to the terminal through the air interface.
  • the ASN repackages the IP stream or the IP multicast group in the SF or DP according to the MBS planning requirements, the division of the MBS domain, the QoS requirements of the IP flow, and the MBS authentication request, and sends the packet to the SF or the DP, and sends the packet to the one or more.
  • the BS carries different SFs on different air interface connections.
  • the BS can carry different air interface link layer connections on the same physical resource according to the coding adjustment manner, and finally send to one or more MSs.
  • the network side entity passes the LCID in the chain.
  • the road layer identifies the upper layer service of the current air interface connection transmission. If the MS joins the MBS as the service object, the network side entity identifies the current air interface connection transmission layer at the link layer through the LCID. business.
  • the object that the terminal joins the MBS can be an IP multicast group, and can also be an IP stream. Therefore, the present embodiment provides multiple ways for the terminal to join the MBS.
  • the multicast broadcast service server described in each of the foregoing embodiments may be located in a network provided by an ASN network, a CSN network, or a third-party ASP (Application Service Provider).
  • the foregoing functional entities may be located in different physical entities or in the same physical entity, and the present invention is not limited.
  • the present invention carries each media stream in an IP flow or an IP multicast group in a one-to-one or many-to-one manner in the CSN, and each IP stream or IP multicast group is in the ASN. They are carried in the service flow in a one-to-one or many-to-one manner.
  • the MBS service from the content provider can be smoothly carried in the WiMAX network, and the service bearers between the layers have certain independence and independence, and there is no need to modify the existing WiMAX protocol.
  • the content identifier may indicate an IP flow, or may indicate an IP multicast group when the IP multicast group includes and only includes one IP flow. Therefore, the specific object of the content identifier is clarified, and another manner of identifying the IP multicast group other than the IP multicast address is provided.
  • the invention also clarifies that the object that the terminal joins the MBS may be an IP multicast group or an IP stream, and provides multiple ways of joining the MBS.
  • the invention also clarifies that the object of the air interface connection bearer is a service flow, and when multiple IP flows are carried on one MCID, multiple content identifiers need to be distinguished by LCID.
  • the present invention provides a specific factor by which a media stream can be carried to an IP stream or an IP multicast group, and an IP stream or an IP multicast group can be carried to the service stream, thereby making the present invention more practical.

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  • Computer Networks & Wireless Communication (AREA)
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Description

组播广播业务的承载网络、 系统、 设备及方法
本申请要求于 2006 年 9 月 12 日提交中国专利局、 申请号为 200610153367.2、 发明名称为"组播广播业务的承载网络、 系统及方法"的中国 专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信领域, 特别涉及 WiMAX网络中的组播广播技术。 背景技术
WiMAX ( Worldwide Interoperability for Microwave Access, 全球接入微波 互操作性) 是一种无线城域网技术, 用于实现无线宽带接入, 图 1 示出了 WiMAX端到端参考模型。 如图可见, WiMAX系统主要包含移动台 (Mobile Station, 简称" MS" ) /用户站 (Subscribe Station, 简称" SS" )、 接入服务网络 ( Access Service Network, 简称" ASN" )与连接服务网络( Connectivity Service Network, 简称" CSN" )。
其中, ASN定义为为 WiMAX用户终端提供无线接入服务的网络功能集 合, ASN包含了基站(Base Station, 简称" BS" )和 ASN网关(ASN GateWay, 简称" ASN-GW" ) 网元, 一个 ASN可能被多个 CSN共享。
ASN的主要功能包含 BS的功能和 ASN-GW的功能。其中, BS的功能有: 提供 BS和用户站 SS/ MS的 L2连接、 无线资源管理、 测量与功率控制和空中 接口数据的压缩与加密。 ASN-GW的功能有: 为 SS/MS认证、 授权和计费功 能提供代理( proxy )功能; 支持 NSP的网络发现和选择; 为 SS提供 L3信息 的中继 (Relay )功能, 如 IP地址分配。
CSN定义为为 WiMAX用户终端提供 IP连接服务。 CSN主要提供如下功 能: SS/MS的 IP地址分配, Internet接入,验证、授权、计费协议( Authentication, Authorization, Account, 简称" AAA" ) 代理或者服务器, 基于用户的授权控 制, ASN到 CSN的隧道, WiMAX用户的计费以及运营商之间的结算, 漫游 情况下 CSN之间的隧道, ASN之间的切换, 和各种 WiMAX服务(如基于位 置的业务、 多媒体多播和广播业务、 IP多媒体子系统业务)。
MS/SS为用户设备, 用户使用该设备接入 WiMAX网络。
通常的通信是在一个节点和另外一个节点之间的通信,但是随着用户需求 的增加, 以及多种媒体的引入, 就要求新的传输模式, 即一点到多点也可能包 括多点到多点的通信。 为了支持这些模式, 同时又希望满足通信的资源利用有 效性, 即对一些关键的通信资源的复用, 例如空中接口的带宽, 连接标识
( Connection ID, 简称" CID" )和接入网的传输隧道等, 因此, 在现有技术中, 引入了组播广播业务( Multicast Broadcast Service , 简称" MBS" )。
传统的通信概念中,广播和组播是一种从一个数据源向多个目标传送数据 的技术。 上述 MBS提供了在移动网络中由一个数据源向多个用户发送数据的 规范, 由此可实现网络资源共享, 提高网络资源的利用率, 尤其是空中接口资 源的利用率。
值得指出的是, 上述 MBS不仅能够实现纯文本、 低速率的消息类业务的 组播和广播, 还能够实现高速多媒体业务的组播和广播, 例如, 视频点播、 电 视广播、 视频会议、 网上教育、 互动游戏等等。
现有技术协议对 MBS 在空中接口的信令以及数据传输上进行了支持。 MBS传输模式可以分为单 BS模式以及多 BS模式, 而 MBS域的概念是定义 在多 BS模式下的。 所谓一个 MBS域就是一个 BS的集合, 这个集合中的 BS 必须满足一个条件: 发送 MBS 数据的时候使用的多播连接标识 (Multicast Connection Identifier, 简称" MCID" )和安全联盟 ( Security Association, 简称 "SA" ) 必须是一致的。 现有技术对单 BS模式没有详细的描述; 但是对多 BS 模式下, BS如何发送 MBS数据, MS如何接收 MBS数据, 以及 BS如何通 知 MS感兴趣的 MBS数据的发送, 都有相应的描述。
现有系统中空中接口的主要描述如下:
第一, 广播 CID上广播的下行映射消息 ( DL-MAP , Downlink MAP ) 包 含零到一个或多个多播广播业务映射信元( MBS-MAP-IE, Multicast Broadcast Service MAP Information Element ), MBS-MAP-IE上每一项以 MBS域 ID作为 标识。
第二, 一个 MBS-MAP-IE 标识空中接口上广播一个多播广播业务映射 ( MBS-MAP, Multicast Broadcast MAP )消息的物理资源; 如果是单 BS模式 则直接指示的是 MBS的物理资源。
第三,一个 MBS-MAP消息可以包含零到一个或多个多播广播业务数据信 MBS-DATA-IE, 这些 MBS-DATA-IE之间的物理参数可以一致也可以不一致, 由网络侧决定; 但是一个 MBS-DATA-IE仅仅只有一个物理参数集。
第四, 一个 MBS-DATA-IE 中包含一到多个 MCID; 之所以要求一个 MBS-DATA-IE包含一个到多个 MCID, 是出于减小 MBS-MAP消息长度的考 虑,把相同下行编码调制方式( DIUC, Downlink Interval Usage Code )的 MBS 数据所对应的 MCID都在一个 MBS-DATA-IE中指示出来。 在数据传输上, 就 是把 DIUC相同的 MAC-PDU ( Medium Access Control- Protocol Data Unit, 媒 体接入控制层的协议数据单元)都放在一个物理资源上传输, 虽然不同 MBS 的数据在物理资源内混在一起了, 但是可以通过 MAC-PDU头上的 MCID在 MAC层上区分开。 不是所有的 MCID对应于同一个 MBS, 而是每一个 MCID 对应于一个 MBS。
第五, 一个扩展 MBS-DATA-IE中, 一个 MCID还包含一到多个逻辑信道 ID。 逻辑信道 ID是空中接口中使用的, 用于告知 MS当前指示的 MBS数据 中是否有其感兴趣的内容。
另外, 下行信道描述符 (DCD, Downlink Channel Descriptor )上可以携 带零到一个或多个 MBS域 ID。 多播广播业务内容标识( MBS Content ID )和 MCID以及逻辑信道 ID这一组信息——对应。 通过多播广播业务内容标识来 标识 WiMAX接入网服务流( Service Flow ,简称 "SF,)或接入网数据通道( Data Path, 简称 "DP" )承载的上层数据流。
DL-MAP消息指示出下一个 MBS-MAP消息发送的物理资源, 但是并不 区分 MBS-MAP消息中包含的 MCID以及逻辑信道 ID; MBS-DATA-IE中也有 对下一个 MBS-MAP消息物理资源的指示, 与 DL-MAP中的指示不同之处在 于, 这里的 MBS-MAP消息是一个特殊的 MBS-MAP消息, 其中一定包含一 个 MBS-DATA-IE,该 MBS-DATA-IE拥有和当前 MBS-DATA-IE—致的 MCID 和逻辑信道 ID。 这样, 终端就无需逐个接收 DL-MAP消息, 仅仅需要从当前 的 MBS-MAP-IE就可以知道下一个关心的 MBS-MAP消息的发送时刻。
另外, MBS-DATA-IE中还有一个改变指示, 如果没有改变, 就直接接收 MBS数据; 否则需要解析新的 MBS-DATA-IE, 以更新终端的相关 MBS信息。 现有标准中描述了空中接口链路层如何承载 MBS:
1、 空中接口链路层可通过单播空中接口连接(CID )或多播空中接口连 接(MCID ), 承载一个网络侧的 SF;
2、 网络侧的 SF通过 SFID标识, 一个 SF可以承载一个或多个高层数据 流, 高层数据流通过 Content ID标识。
但是,现有技术中仅描述了空中接口链路层如何承载 MBS ,未提供从 MBS 服务器到终端完整的业务承载方案。也就是说,现有技术没有给出完整的技术 方案,如没有给出对于一个来自内容服务商的业务,如何在 WiMAX网络中被 承载和管理, 没有给出现有定义的 Content ID是什么对象的标识, MS加入 MBS 的对象是什么, 一个空中接口连接承载的对象是什么, 以及何时承载多 个 Content ID等等。 而不同的承载方式对应了完全不同的解决方案, 可见, 现 有技术中未给出具体的解决方案。
发明内容
本发明提供一种组播广播业务的承载网络、 系统、 设备及方法, 使得 WiMAX网络可以承载 MBS业务。
本发明提供了一种组播广播业务的承载网络, 包含:
第一承载网络,用于将来自内容提供网络的各媒体流分别以一对一或多对 一的方式承载在 IP流或 IP组播组中;
接入服务网络, 用于将来自第一承载网络的各 IP流或 IP组播组分别以一 对一或多对一的方式承载在服务流或数据通道中, 通过空中接口向终端发送。
本发明还提供了一种组播广播业务的承载系统, 包含:
组播广播业务服务器,用于将来自内容提供网络的各媒体流分别以一对一 或多对一的方式承载在 IP流或 IP组播组中发送到至少一个组播广播业务代 理;
组播广播业务代理,用于将来自至少一个组播广播业务服务器的至少一个
IP流或 IP组播组分别以一对一或多对一的方式承载在服务流或数据通道中发 送;
基站,用于将所述服务流或数据通道承载在不同的空中接口连接中向终端 发送。 本发明还提供了一种组播广播业务服务器, 包含:
用于接收媒体流的模块;
用于将一个或多个所述媒体流以一对一或多对一的方式 载在 IP流或 IP 组播组中发送的模块。
本发明还提供了一种组播广播业务代理, 包含:
用于接收来自至少一个组播广播业务服务器的至少一个 IP流或 IP组播组 的模块;
用于将所述至少一个 IP流或 IP组播组分别以一对一或多对一的方式承载 在服务流或数据通道中发送的模块。
本发明还提供了一种组播广播业务的承载方法, 包含:
将来自内容提供网络的各媒体流分别以一对一或多对一的方式承载在 IP 流或 IP组播组中;
将各 IP流或 IP组播组分别以一对一或多对一的方式承载在服务流或数据 通道中, 通过空中接口向终端发送。
本发明的技术方案在 CSN中将各媒体流分别以一对一或多对一的方式承 载在 IP流或 IP组播组中,在 ASN中将各 IP流或 IP组播组分别以一对一或多 对一的方式承载在服务流中。 通过这种承载模型, 来自内容服务商的 MBS业 务可以顺利承载在 WiMAX网络中,各层间业务承载具有一定的无关性和独立 性, 不需要修改 WiMAX现有的协议。
本发明提供了将媒体流承载到 IP流或 IP组播组, 以及将 IP流或 IP组播 组承载到服务流时可依据的具体因素, 从而使本发明更具实用性。
附图说明
图 1是根据现有技术中 WiMAX网络架构示意图;
图 2是根据本发明第一实施方式的 MBS的承载网络示意图;
图 3是根据本发明第二实施方式的 MBS的承载系统示意图;
图 4是根据本发明第三实施方式的 MBS的承载方法流程图。
具体实施方式
下面将结合附图对本发明作进一步地详细描述。
本发明中, CSN将来自内容提供网络的各媒体流分别以一对一或多对一 的方式承载在 IP流或 IP组播组中传输给 ASN, ASN将来自 CSN的各 IP流或 IP组播组分别以一对一或多对一的方式承载在服务流中, 通过空中接口向终 端发送。各层网络可以将上层网络提供的不同数据流承载在本层网络的同一个 数据流中, 也可将上层网络提供的不同数据流承载在本层网络的不同数据流 中。 具体承载方式由网络侧实体决定。
下面根据上述原理,对本发明的第一实施方式进行详细阐述。本发明的第 一实施方式涉及 MBS的承载网络, 本实施方式的网络承载模型如图 2所示。
具体地说, 在内容提供网络中, 内容服务提供商提供一个或多个媒体流给 CSN,该媒体流可以代表一个具体的业务,也可以代表一组业务的集合。其中, 媒体流是内容服务提供商提供给 MBS服务器 ( MBS Server )的基本业务对象。 同一个媒体流可以提供给不同的 CSN 网络, 每一个媒体流提供给至少一个 CSN。
在 CSN中, CSN使用 IP流或 IP组播组承载上层网络提供的媒体流, 每 个 IP组播组包含至少一个 IP流。 CSN网络可以将不同的媒体流承载在不同的 IP流中, 如图 2中所示情况 1和 2; 也可以将不同的媒体流承载在同一 IP流 中, 如图 2中所示情况 3。 其中, IP流是指能够通过 IP报文中的 IP源地址、 IP目的地址、 服务优先级 TOS/DSCP ( Type of Service/ DiffServ Code Point )、 协议类型、 流标签( Flow Label )、 TCP ( Transmission Control Protocol, 传输 控制协议)/UDP( User Datagram Protocol,用户数据 4艮协议)源端口号、 TCP/UDP 目的端口号中的一个或多个唯一标识的 IP数据流。
IP流作为 CSN网络提供给 ASN网络的基本业务对象, 每一个 IP流发送 到至少一个 ASN和 /或 MBS域(如 IEEE 802.16d/e定义的 MBS zone ) 中, 同 一个 IP流可发送到不同的 ASN网络和 /或 MBS域内。 不同的 IP流通过 IEEE 802.16d/e定义的 MBS Content ID标识。
当使用 IP组播技术时, IP组播地址由 CSN分配, 同一个 IP组播组可包 含一个或多个 IP流。 当一个 IP组播组包含且只包含一个 IP流时, Content ID 也可用来标识组播组。 由于明确了 Content ID的具体对象, 因此本实施方式提 供了 IP组播地址以外的另一种标识 IP组播组的方式。 CSN可通过 IP组播路 由或隧道方式将包含一个或多个 IP流的 IP组播 "^文发送到不同的 ASN网络 和 /或 MBS域内。
在 ASN中, ASN使用 SF承载上层网络 CSN提供的 IP流或组播组。 ASN 可以将不同的 IP流或组播组承载在不同的 SF中, 如图 2中所示情况 1; 也可 以将不同的 IP流或组播组承载在同一个 SF中,如图 2中所示情况 2和情况 3。
SF作为 ASN内的基本业务对象, 每个 SF发送到同一个 ASN和 /或 MBS 域内的至少一个 BS , 同一个 SF可发送到同一个 ASN和 /或 MBS域内的不同 BS。
不同的 SF通过 IEEE 802.16d/e定义的 SFID标识。
在空中接口中, 同一个 SF使用一个 CID或 MCID在空中接口上承载, 同 一个 CID或 MCID可发送到不同的 MS。当多个 IP流承载在一个 MCID上时, 还需要使用逻辑通道标识 LCID ( Logical Channel ID, 简称" LCID" )在链路层 区别。 一个 LCID在一个 MCID上唯一对应一个 Content ID。
同一个 BS的不同的 MCID如果可以使用的编码调制方式相同, BS可根 据需要将多个 MCID在同一个物理资源上传输。
由此可见, 通过上述承载模型, 来自内容服务商的 MBS可以顺利承载在
WiMAX 网络中, 各层间业务承载具有一定的无关性和独立性, 不需要修改 WiMAX现有的协议。
值得一提的是, 根据终端加入 MBS的方式不同, 终端加入的业务对象有 以下几种情况:
1 )当终端使用 IP组播加入 MBS时, CSN提供的 IP组播组是终端加入的 基本业务对象; 当一个 SF承载多个 IP组播组或一个组播组包含多个 IP流时, 即一个 SF包含了多个 Content ID标识的数据流时,网络侧实体还需分配 LCID, 用于在链路层标识该空中接口连接当前传输了哪些上层业务。
2 ) 当终端在使用动态服务流创建(DSA, Dynamic Service Addition )过 程中携带 Content ID加入 MBS时, CSN提供的 IP流是终端加入的基本业务 对象; 当一个 SF承载多个 IP流时, 网络侧实体还需分配 LCID, 用于在链路 层标识该空中接口连接当前传输了哪些 IP流。
由于终端加入 MB S的对象可以是一个 IP组播组, 也可以是一个 IP流, 因此, 本实施方式为终端提供了多种加入 MBS的方式。 本发明的第二实施方式涉及 MBS的承载系统, 如图 3所示, 包含 MBS 服务器,用于将来自内容提供网络的各媒体流分别以一对一或多对一的方式承 载在 IP流或 IP组播组中; MBS代理, 是 ASN网络或 MBS域内为 MS处理 MBS信令的功能实体, 用于将来自至少一个 MBS服务器的至少一个 IP流或 IP组播组分别以一对一或多对一的方式承载在 SF中, 该 MBS代理位于 ASN 网关中; BS, 用于将来自 MBS代理的不同的 SF承载在不同的空中接口连接 中向终端发送。
可以理解的是, 图 3中所示仅仅是示意性的, 表示逻辑结构, 其中所述作 为分离部件显示的单元可能是或者可能不是物理上分开的,作为单元显示的部 件可能是或者可能不是物理单元, 即可以位于一个地方, 或者分布到几个网络 单元上。 比如, MBS代理可以是一个逻辑实体, 可以位于 BS或 ASN网关中, 也可以是一个物理实体, 独立于 BS或 ASN网关存在。
具体地说, MBS服务器是 MBS的提供者。 MBS服务器接收来自一个或 多个内容提供商提供的一个或多个媒体流。根据不同内容提供商的要求、 不同 媒体流的服务质量(Quality of Service, 简称" QoS" )要求、 当前 MBS服务器 和网络的资源状况以及网络服务提供商 (NetWork Service Procider, 简称 "NSP" ) 的服务策略、 MBS规划等因素, 将媒体流重新打包承载在 IP流中, 最终传送给一个或多个 ASN网关。
如果使用 IP组播, 则 MBS服务器还需负责分配 IP组播地址、 构建 IP组 播组并将一个或多个 IP流承载在 IP组播组上传输。
ASN网关是 ASN内的实体, ASN网关的 MBS代理接收来自一个或多个 MBS服务器提供的一个或多个 IP流或 IP组播组, 并根据 MBS规划要求、 MBS域的划分、 IP流的 QoS要求、 MBS鉴权要求等因素, 将 IP流或 IP组播 组重新打包承载在 SF或 DP中,发送给一个或多个 BS。其中, SF是通过 SFID 标识的业务流, DP是通过 GRE Key ( Generic Routing Encapsulation Key )标 识的承载通道。
其中, MBS鉴权要求是指, ASN网关将不同 IP流承载在同一 SF上时需 考虑这些 IP流是否来自同一个 MBS服务器且具有相同的 MBS鉴权密钥 MAK ( MBS Authorization Key ), 如果是才考虑可在一个 SF上承载。 MBS规划要 求是指, ASN网关将不同 IP流承载在同一 SF上时需考虑这些 IP流是否来自 同一个 MBS服务器且业务规划时要求在此 ASN网络内播送,如果是才考虑可 在一个 SF上承载。
BS将不同的 SF承载在不同的空中接口连接上。 至于 BS是使用单播空中 接口连接 CID还是多播空中接口连接 MCID由 BS决定。 BS可根据编码调整 方式将不同的空中接口链路层连接承载在同一个物理资源上,最终发送到一个 或多个 MS。
通过本实施方式中的 MBS服务器、 MBS代理以及基站,使得来自内容服 务商的 MBS可以顺利承载在 WiMAX网络中, 各层间业务承载具有一定的无 关性和独立性, 不需要修改 WiMAX现有的协议。 而且, 本实施方式提供了将 媒体流 7?载到 IP流或 IP组播组, 以及将 IP流或 IP组播组 7 载到 SF时可依 据的具体因素, 从而使本发明更具实用性。
本发明的第三实施方式涉及 MBS的承载方法, 具体如图 4所示。
在步骤 410 中, CSN将来自内容提供网络的各媒体流分别以一对一或多 对一的方式承载在 IP流或 IP组播组中。 具体地说, CSN根据不同内容提供网 络的要求、 不同媒体流的 QoS要求、 当前 MBS服务器和网络的资源状况以及 NSP ( Network Service Provider, 网络服务提供商) 的服务策略、 MBS规划等 因素, 将媒体流重新打包承载在 IP流中, 最终传送给一个或多个 ASN网关。
接着, 进入步骤 420, ASN将来自 CSN的各 IP流或 IP组播组分别以一 对一或多对一的方式承载在 SF或 DP中, 通过空中接口向终端发送。 具体地 说, ASN根据 MBS规划要求、 MBS域的划分、 IP流的 QoS要求、 MBS鉴权 要求等因素, 将 IP流或 IP组播组重新打包承载在 SF或 DP中, 发送给一个 或多个 BS。 BS将不同的 SF承载在不同的空中接口连接上。 至于 BS是使用 单播空中接口连接 CID还是多播空中接口连接 MCID, 由 BS决定。 BS可根 据编码调整方式将不同的空中接口链路层连接承载在同一个物理资源上,最终 发送到一个或多个 MS。
不难发现, 来自内容服务商的 MBS可以顺利承载在 WiMAX网络中, 各 层间业务承载具有一定的无关性和独立性,因此不需要修改 WiMAX现有的协 议。 需要说明的是, 如果 MS以 IP组播组为业务对象加入 MBS, 则当一个服 务流承载多个 IP组播组或一个 IP组播组包含多个 IP流时 , 网络侧实体通过 LCID在链路层标识当前空口连接传输的上层业务;如果 MS以 IP流为业务对 象加入 MBS, 则当一个服务流承载多个 IP流时, 网络侧实体通过 LCID在链 路层标识当前空口连接传输的上层业务。 由于终端加入 MBS的对象可以是一 个 IP组播组, 也可以是一个 IP流, 因此, 本实施方式为终端提供了多种加入 MBS的方式。
上述各具体实施方式中所述的组播广播业务服务器可位于 ASN 网络、 CSN网络或第三方 ASP ( Application Service Provider, 应用服务提供商 )提供 的网络中。 上述各功能实体可以位于不同的物理实体,也可位于相同的物理实 体, 本发明不做限制。
由上述各实施例可见, 本发明在 CSN中将各媒体流分别以一对一或多对 一的方式承载在 IP流或 IP组播组中,在 ASN中将各 IP流或 IP组播组分别以 一对一或多对一的方式承载在服务流中。通过这种承载模型, 来自内容服务商 的 MBS业务可以顺利承载在 WiMAX网络中, 各层间业务承载具有一定的无 关性和独立性, 不需要修改 WiMAX现有的协议。
在本发明实施例中, 内容标识既可以指示一个 IP流, 也可以在 IP组播组 包含且只包含一个 IP流时指示 IP组播组。 从而明确了内容标识的具体对象, 提供了 IP组播地址以外的另一种标识 IP组播组的方式。
本发明还明确了终端加入 MBS的对象可以是一个 IP组播组,也可以是一 个 IP流, 提供了多种加入 MBS的方式。
本发明还明确了空中接口连接承载的对象是服务流, 当多个 IP流承载在 一个 MCID上时需要以 LCID区分多个内容标识。
本发明提供了将媒体流承载到 IP流或 IP组播组, 以及将 IP流或 IP组播 组承载到服务流时可依据的具体因素, 从而使本发明更具实用性。
虽然通过参照本发明的某些优选实施方式,已经对本发明进行了图示和描 述,但本领域的普通技术人员应该明白, 可以在形式上和细节上对其作各种改 变, 而不偏离本发明的精神和范围。

Claims

权 利 要 求
1. 一种组播广播业务的承载网络, 其特征在于, 包含:
第一承载网络,用于将来自内容提供网络的各媒体流分别以一对一或多对 一的方式承载在 IP流或 IP组播组中;
接入服务网络, 用于将来自第一承载网络的各 IP流或 IP组播组分别以一 对一或多对一的方式承载在服务流或数据通道中, 通过空中接口向终端发送。
2. 根据权利要求 1所述的组播广播业务的承载网络, 其特征在于, 所述 第一承载网络为所述接入服务网络、或连接服务网络或、 第三方应用服务商的 网络。
3. 根据权利要求 1或 2所述的组播广播业务的承载网络, 其特征在于, 每个所述 IP组播组包含至少一个 IP流。
4. 根据权利要求 1至 3中任一项所述的组播广播业务的承载网络, 其特 征在于, 通过多播广播业务内容标识指示所述 IP组播组。
5. 根据权利要求 1至 4中任一项所述的组播广播业务的承载网络, 其特 征在于, 每一个媒体流提供给至少一个所述第一承载网络。
6. 根据权利要求 1至 5中任一项所述的组播广播业务的承载网络, 其特 征在于,每一个 IP流发送到至少一个所述接入服务网络和 /或组播广播业务域。
7. 根据权利要求 1至 6中任一项所述的组播广播业务的承载网络, 其特 征在于, 一个服务流或数据通道被发送到同一个所述接入服务网络和 /或组播 广播业务域内的至少一个基站。
8. 根据权利要求 1至 7中任一项所述的组播广播业务的承载网络, 其特 征在于, 同一个服务流或数据通道使用一个连接标识 CID 或多播连接标识 MCID在空中接口上承载, 同一个 CID或 MCID被发送到至少一个终端。
9. 根据权利要求 1至 8中任一项所述的组播广播业务的承载网络, 其特 征在于, 多个 IP流承载在一个 CID或 MCID上, 并以逻辑通道标识 LCID在 链路层区分, 一个 LCID在一个 CID 或 MCID上唯一对应一个多播广播业务 内容标识。
10. 一种组播广播业务的承载系统, 其特征在于, 包含:
组播广播业务服务器,用于将来自内容提供网络的各媒体流分别以一对一 或多对一的方式承载在 IP流或 IP组播组中发送到至少一个组播广播业务代 理;
组播广播业务代理,用于将来自至少一个组播广播业务服务器的至少一个
IP流或 IP组播组分别以一对一或多对一的方式承载在服务流或数据通道中发 送;
基站,用于将所述服务流或数据通道承载在不同的空中接口连接中向终端 发送。
11. 根据权利要求 10所述的组播广播业务的承载系统, 其特征在于, 所 述组播广播业务代理位于接入服务网络网关或基站中。
12.根据权利要求 10或 11所述的组播广播业务的承载系统,其特征在于, 所述组播广播业务服务器根据以下因素之一或其任意组合将媒体流承载在 IP 流或 IP组播组中:
内容提供网络的要求、媒体流的服务质量要求、组播广播业务服务器自身 资源状况、 连接服务网络的网络资源状况、 网络服务提供商的服务策略、 以及 组播广播业务的业务规划。
13. 根据权利要求 10至 12任一项所述的组播广播业务的承载系统, 其特 征在于, 所述组播广播业务服务器使用 IP组播组承载来自内容提供网络的媒 体流时, 所述组播广播业务服务器还用于分配 IP组播地址、 构建 IP组播组, 并将至少一个 IP流承载在 IP组播组上传输。
14. 根据权利要求 10至 13任一项所述的组播广播业务的承载系统, 其特 征在于, 所述组播广播业务代理根据以下因素之一或其任意组合将 IP流或 IP 组播组承载在服务流或数据通道中:
组播广播业务规划要求、 组播广播业务域的划分、 IP流的服务质量要求、 以及组播广播业务鉴权要求。
15. 根据权利要求 14所述的组播广播业务的承载系统, 其特征在于, 所 述组播广播业务规划要求包含:
能够承载在同一服务流或数据通道的各 IP流来自同一个组播广播业务服 务器且具有相同的多播广播业务鉴权密钥; 或者
能够承载在同一服务流或数据通道的各 IP流来自同一个组播广播业务服 务器且业务规划时要求在同一接入服务网络内播送。
16. 根据权利要求 10所述的组播广播业务的承载系统, 其特征在于, 所 述组播广播业务服务器位于连接服务网络或接入服务网络或内容服务网络中。
17. 一种组播广播业务服务器, 其特征在于, 包含:
用于接收媒体流的模块;
用于将一个或多个所述媒体流以一对一或多对一的方式 载在 IP流或 IP 组播组中发送的模块。
18. 根据权利要求 17所述的组播广播业务服务器, 其特征在于, 所述组 播广播业务服务器使用 IP组播组承载来自内容提供网络的媒体流时,还包括: 用于分配 IP组播地址、 构建 IP组播组, 并将至少一个 IP流 7 载在 IP组 播组上传输的模块。
19. 根据权利要求 17或 18所述的组播广播业务服务器, 其特征在于, 所 述组播广播业务服务器位于连接服务网络或接入服务网络或内容服务网络中。
20. 一种组播广播业务代理, 其特征在于, 包含:
用于接收来自至少一个组播广播业务服务器的至少一个 IP流或 IP组播组 的模块;
用于将所述至少一个 IP流或 IP组播组分别以一对一或多对一的方式承载 在服务流或数据通道中发送的模块。
21. 根据权利要求 20所述的组播广播业务代理, 其特征在于, 所述组播 广播业务代理位于接入服务网络网关或基站中。
22. 一种组播广播业务的承载方法, 其特征在于, 包含:
将来自内容提供网络的各媒体流分别以一对一或多对一的方式承载在 IP 流或 IP组播组中;
将各 IP流或 IP组播组分别以一对一或多对一的方式承载在服务流或数据 通道中, 通过空中接口向终端发送。
23. 根据权利要求 22所述的组播广播业务的承载方法, 其特征在于, 根 据以下因素之一或其任意组合将媒体流承载在 IP流或 IP组播组中:
内容提供网络的要求、媒体流的服务质量要求、 网络资源状况、 网络服务 提供商的服务策略、 以及组播广播业务的业务规划。
24.根据权利要求 22或 23所述的组播广播业务的承载方法,其特征在于, 根据以下因素之一或其任意组合将 IP流或 IP组播组承载在服务流或数据通道 中:
组播广播业务规划要求、 组播广播业务域的划分、 IP流的服务质量要求、 以及组播广播业务鉴权要求。
25. 根据权利要求 22至 24中任一项所述的组播广播业务的承载方法, 其 特征在于, 所述终端以 IP组播组为业务对象加入组播广播业务;
当一个服务流或数据通道承载多个 IP组播组或一个 IP组播组包含多个 IP 流时, 通过逻辑通道标识 LCID在链路层标识当前空口连接传输的上层业务。
26. 根据权利要求 22至 24中任一项所述的组播广播业务的承载方法, 其 特征在于, 所述终端以 IP流为业务对象加入组播广播业务;
当一个服务流或数据通道承载多个 IP流时,通过分配逻辑通道标识 LCID 在链路层标识空中接口连接当前传输的上层业务。
PCT/CN2007/070680 2006-09-12 2007-09-12 Réseau support, système, dispositif et procédé de service de diffusion multidiffusion WO2008031362A1 (fr)

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