WO2009000208A1 - Procédé de transmission de données de service de multidiffusion, procédé de mise en application de service de multidiffusion, station de base, station relais et terminal - Google Patents

Procédé de transmission de données de service de multidiffusion, procédé de mise en application de service de multidiffusion, station de base, station relais et terminal Download PDF

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Publication number
WO2009000208A1
WO2009000208A1 PCT/CN2008/071443 CN2008071443W WO2009000208A1 WO 2009000208 A1 WO2009000208 A1 WO 2009000208A1 CN 2008071443 W CN2008071443 W CN 2008071443W WO 2009000208 A1 WO2009000208 A1 WO 2009000208A1
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WO
WIPO (PCT)
Prior art keywords
code stream
information code
base station
multicast service
information
Prior art date
Application number
PCT/CN2008/071443
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English (en)
Chinese (zh)
Inventor
Lian Yang
Xiaojing Zhang
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 WO2009000208A1 publication Critical patent/WO2009000208A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for transmitting multicast service information, a method for implementing a multicast service, and a base station, a relay station, and a terminal.
  • Multimedia broadcast and multicast services proposed in the 3rd Generation Partnership Project (3GPP) organization ( Multimedia Broadcast and Multicast Service, MBMS); Broadcast and Multicast Service (BCMCS) proposed in the 3rd Generation Partnership Project (3GPP2) organization; proposed in IEEE 802.16e organization Broadcast Multicast Service (MBS), etc.
  • 3GPP 3rd Generation Partnership Project
  • BCMCS Broadcast and Multicast Service
  • 3GPP2 3rd Generation Partnership Project 2
  • MMS Broadcast and Multicast Service
  • This type of multicast service refers to a point-to-multipoint service in which a data source sends data to multiple users, and realizes network resource sharing, including mobile core network and access network resource sharing, especially air interface resources.
  • These multicast services not only implement plain text low-rate message-like multicast and broadcast, but also achieve high-rate multimedia service multicast and broadcast.
  • a high-speed multimedia service needs to be coded into a code stream.
  • the so-called code stream is a binary data stream formed by specifically encoding a video, audio, and the like in order to adapt to the transmission of the digital communication system.
  • the implementation method of the multicast service is: First, the system performs multi-bit rate coding on the to-be-transmitted service information, obtains a basic information code stream for implementing the multicast service, and at least one is used for An enhanced information code stream that improves the quality of the service, where the basic information code stream implements a basic multicast service, and the enhanced information code stream cannot implement the multicast service separately. Then, the system delivers the basic information code stream through the low-rate physical channel, so that the basic information code stream covers the entire cell; the system sends the enhanced information code stream to the higher-rate physical channel to enable the user with better channel conditions. An enhanced information stream can be received.
  • the user obtains the basic information code stream to implement the multicast service, where the basic information code stream is generally composed of one information code stream; the user obtains the enhanced information code stream, and enhances the information code stream in the basic information code stream.
  • the enhanced information code stream typically includes at least one information code stream, and the same information code stream is sent over a physical channel having the same rate.
  • the transmission of information needs to be divided into two phases: the content that the relay needs to broadcast is transmitted to the relay station, and the relay station caches the content in its downlink data buffer, and the transmission mode may be broadcast or dedicated. channel;
  • the base station and the relay station need to simultaneously broadcast the same content on the same time-frequency resource block, so that the users under the coverage can receive normally. To the multicast business.
  • the technical problem to be solved by the embodiments of the present invention is to provide a method for transmitting multicast service information, a method for implementing a multicast service, a base station, a relay station, and a terminal, and realizing a better combination of a multicast service and a relay system.
  • an embodiment of the present invention provides a method for transmitting multicast service information, including:
  • the base station sends the first information code stream, the relay station receives the first information code stream sent by the base station, the base station sends the second information code stream, and the relay station simultaneously sends the received first information code stream.
  • an embodiment of the present invention provides a method for implementing a multicast service, including:
  • the terminal acquires the first information code stream to implement the multicast service.
  • an embodiment of the present invention provides a base station, including: a coding unit and a sending unit;
  • the coding unit is configured to encode the service information to be sent, to obtain a first information code stream and a second information code stream;
  • the sending unit is configured to send the first information code stream obtained by the coding unit to a relay station and/or a terminal, and send the second information code stream obtained by the coding unit to a terminal.
  • an embodiment of the present invention provides a relay station, including: a receiving unit, configured to receive a first information code stream sent by a base station;
  • a sending unit configured to send, when the base station sends the second information code stream, the first information code stream received by the receiving unit.
  • an embodiment of the present invention provides a terminal, including:
  • a receiving unit configured to receive the first information code stream and the second information code stream
  • the to-be-transmitted service information is encoded to obtain a first information code stream and a second information code stream; the base station sends the first information code stream, and the relay station receives the first information sent by the base station.
  • FIG. 1 is a schematic diagram of a principle for delivering a multicast service in the prior art
  • FIG. 2 is a schematic flowchart of a method for implementing a multicast service according to a first embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a frame according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to a third embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a relay station according to a fourth embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a terminal according to a fifth embodiment of the present invention.
  • the method includes:
  • Step 201 Encode the to-be-transmitted multicast service information into a basic information code stream and an enhanced information code stream.
  • the multicast service information to be transmitted is incrementally multi-rate encoded at the application layer, and is encoded by a basic information code stream and one to multiple enhanced information code streams.
  • the basic information code stream is used to implement multicast services, and the information stream is enhanced.
  • the multicast service information to be sent is a video signal, and when incremental multi-rate coding is performed, the gray information of the video signal can be encoded to obtain a basic information code stream capable of realizing a black and white image; An enhanced information code stream of the color image is further implemented; and the enhanced information code stream can also be hierarchically included with different enhanced information code streams for increasing the gray level or increasing the image resolution.
  • Step 202 The base station sends a basic information code stream, and the relay station receives the basic information code stream.
  • the base station transmits a basic information code stream.
  • all terminal users and relay stations within the coverage of the base station receive the basic information code stream sent by the base station together.
  • the end user stores the data in its own data area, and the relay station stores the received basic information code stream in its forwarding data area.
  • Step 203 The base station sends an enhanced information code stream, and the relay station sends the basic information code stream.
  • the base station After the base station sends the basic information code stream, it is separated by a period of time. In the second stage, the base station retransmits the enhanced information code stream.
  • the interval time cannot be shorter than the transmission and reception conversion time of the relay station. Otherwise, the transmission and reception conversion of the relay station cannot be satisfied.
  • the interval time cannot be longer than the MBMS service processing time and the integration time of the basic information code stream and the enhanced information code stream by the terminal user. Otherwise, the MBMS service is It will be affected, and the end user will not be able to combine the received basic information stream and the enhanced information stream.
  • the relay station While the base station transmits the enhanced information code stream, the relay station transmits the basic information code stream previously received and stored in the forwarded data area.
  • Step 204 The terminal receives the basic information code stream and the enhanced information code stream.
  • the terminal user receiving the basic information code stream in the first stage receives the enhanced information code stream sent by the base station, and optimizes the already implemented multicast service; fails to receive the basic in the first stage. If the user of the information stream information can receive the basic information code stream sent by the relay station at this time, the basic information code stream and the enhanced information code stream can be received at the same time, and the basic multicast service can be realized and optimized.
  • the terminal user does not receive the basic information code stream and the enhanced information code stream sent by the base station, but if the terminal user is within the coverage of the relay station, the terminal can receive the relay.
  • the basic information code stream sent in the second stage is implemented to implement basic multicast services.
  • the base station in the second phase, sends the enhanced information code stream, and the relay station sends the basic information code stream by using frequency division, time division, code division, and space division, regardless of which type is used.
  • the mode is transmitted as long as the user terminal can receive and distinguish the basic information stream and the enhanced information stream.
  • the method for transmitting the multicast service information according to the embodiment of the present invention is implemented by the foregoing steps 201, 202, and 203, and details are not described herein again.
  • FIG. 3 is a schematic diagram of a frame structure in an embodiment of the present invention.
  • a base station and a relay station transmit resources in a frequency division manner.
  • the horizontal axis direction is the time domain, in units of frames; the vertical axis direction is the frequency domain, which has a total bandwidth of 5M, and the time-frequency resources can be simultaneously used by the base station and the relay station.
  • Each frame is divided into two phases, and there is a certain time interval between the first phase and the second phase.
  • the base station sends a basic information code stream PP (Packe t Pr imary ), the relay station receives the basic information code stream sent by the base station; in the second stage, the base station transmits the enhanced information code stream PE (Packe t Enhanced ), and the relay station transmits the basic
  • the PP and PE data volume ratio may be 1 ⁇ 1
  • the relay station receives the basic information code stream sent by the base station in the first phase of each frame, and uses the second phase of each frame.
  • Half of the bandwidth broadcasts the basic information stream received.
  • the relay station needs to use twice as much coding or modulation as the base station.
  • the base station uses the l / 3 Turbo code, and the relay station needs to use the 2/3 Turbo code; or in the modulation mode, the base station uses the 4QAM modulation mode, and the relay station needs to use the 64QAM modulation mode.
  • the proportion of the data volume of the basic information stream and the enhanced information stream can be changed, and the adjustment and coding methods can be used to achieve the most application of the multicast service. Good effect.
  • the multicast service information is decomposed into different code streams, according to the final
  • the different channel conditions of the end users provide multi-quality multicast services, providing basic services for end users with poor channel conditions and higher quality services for end users with good channel conditions.
  • the multicast service is combined with the application of the relay system, and the base station in the relay system transmits the data twice to send the basic information code stream and the enhanced information code stream at one time, and the relay station receives the basic information code stream after receiving the basic information code stream.
  • the base station sends the basic information code stream while transmitting the enhanced information code stream, thereby preventing the base station from repeatedly transmitting the same content twice, thereby causing waste of the wireless resources.
  • the coverage of the multicast service is expanded by utilizing the performance of the relay station.
  • the modification of the existing multicast service is small, and the application of the MBMS in the relay system can be further facilitated.
  • the second embodiment of the present invention will be described below with respect to a method for implementing a multicast service.
  • the steps in the method are basically the same as the steps in the first embodiment of the present invention.
  • the difference is that in the first stage, the base station first transmits the enhanced information code stream, and the relay station receives the enhanced information code stream sent by the base station; in the second stage, the base station sends The basic information stream, the relay station transmits an enhanced information stream.
  • the end user receives the basic information stream and the enhanced information stream.
  • the terminal user that only receives the enhanced information code stream cannot implement the multicast service. Therefore, in the method provided by the specific implementation manner, the terminal user that can only receive the signal sent by the relay station cannot implement the multicast service, but only the terminal user Multicast services can be implemented by being able to receive basic information streams sent by other base stations. Therefore, the scope of protection required by this.
  • the base station includes an encoding unit 401 and a transmitting unit 402.
  • the coding unit 401 is configured to encode the multicast service information to be sent, to obtain the first information code stream and the second information code stream.
  • the manner of encoding can be changed according to the degree to which the end user expects the quality of the multicast service.
  • the first information code stream and the second information code stream obtained by the coding may be a basic information code stream or an enhanced information code stream, and the basic information code stream is used to implement a basic multicast service, and the enhanced information code stream is used for optimizing the actual information stream.
  • the current basic multicast service cannot implement the multicast service separately.
  • one basic information code stream and at least one enhanced information code stream may be formed.
  • the sending unit 402 is configured to separately send the first information code stream and the second information code stream that are encoded by the coding unit 401. Transmitting the first information code stream to the relay station and/or the terminal, after receiving the first information code stream, the terminal stores the first information code stream in the data area; after receiving the first information code stream, the relay station stores the first information code stream to be forwarded In the data area, sending the second information code stream, sending the second information code stream after the first information code stream is sent for a period of time, the interval time is not shorter than the transmission and reception conversion time of the relay station, otherwise the transmission and reception conversion of the relay station cannot be satisfied; The interval time cannot be longer than the MBMS service processing time and the combining time of the end user to the basic information stream and the enhanced information stream. Otherwise, the MBMS service will be affected, and the terminal user cannot receive the basic information stream and the enhanced information.
  • the code streams are merged.
  • the base station provided in this embodiment is configured to divide the to-be-transmitted multicast service information into two types of information code streams and sequentially transmit them separately, thereby avoiding the waste of the same content by transmitting the same content twice in the relay system.
  • the relay system and the MBMS service are better combined and applied.
  • the relay station 500 includes a receiving unit 501 and a transmitting unit 502.
  • the receiving unit 501 is configured to receive a first information code stream sent by the base station;
  • the sending unit 502 is configured to send, by the base station, the first information code stream received by the receiving unit 501.
  • the first information code stream sent by the base station is first received, and then the received first information code stream is sent while the base station sends the second information code stream, which is guaranteed to be within the coverage of the base station.
  • the terminal user who has not received the first information stream can still have the opportunity to receive the first information stream, and can enable the terminal user outside the coverage of the base station to receive the first information stream, thereby achieving multiple Broadcasting services, therefore, the use of the relay station can expand the coverage of the multicast service, enabling the multicast service to be used in a wider range of applications.
  • the terminal package A receiving unit 601, a processing unit 602, and an optimization unit 603 are included.
  • the receiving unit 601 is configured to receive the first information code stream and the second information code stream;
  • the receiving unit 601 When the terminal 600 is within the coverage of the base station, the receiving unit 601 first receives the first information code stream sent by the base station, stores it in the data area, and then receives the second information code stream sent by the base station; Within the coverage of the base station, when the base station sends the first information code stream, the receiving unit 601 does not receive the first information code stream, and may receive the first information sent by the relay station while the receiving base station sends the second information code stream. The information code stream; when the terminal 600 is outside the coverage range of the base station, if it is within the coverage of the relay station, the receiving unit 601 may receive the first information code stream when the relay station transmits the first information code stream.
  • the processing unit 602 is configured to implement basic multicast services according to the first information code stream received by the receiving unit 601.
  • the optimizing unit 603 is configured to optimize the basic multicast service according to the second information code stream received by the receiving unit 601.
  • the multicast service information is decomposed into different code streams, and the multi-quality service is provided according to different channel conditions of the terminal user, and the basic service is provided to the terminal user with poor channel conditions, and is the channel. End users with good conditions provide higher quality services.
  • the multicast service is combined with the application of the relay system, and the base station in the relay system transmits the data twice to send the basic information code stream and the enhanced information code stream at one time, and the relay station receives the basic information code stream after receiving the basic information code stream.
  • the base station sends the basic information code stream while transmitting the enhanced information code stream, thereby preventing the base station from repeatedly transmitting the same content twice and wasting the wireless resources.
  • the coverage of the multicast service is expanded by utilizing the performance of the relay station.
  • the modification of the existing multicast service is small, and the application of the MBMS in the relay system can be further facilitated.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de mise en œuvre d'un service de multidiffusion, qui comporte les étapes suivantes: coder des données de service de multidiffusion devant être transmises, de manière à obtenir un premier flux de codes de données et un second flux de codes de données; une station de base transmet le premier flux de codes de données, et une station relais reçoit le premier flux de codes de données; la station de base transmet le second flux de codes de données, et la station relais transmet en même temps le premier flux de codes de données reçu; un terminal obtient le premier flux de codes de données comme service de multidiffusion. L'invention concerne aussi un procédé de transmission de données de service de multidiffusion, une station de base, une station relais et un terminal.
PCT/CN2008/071443 2007-06-27 2008-06-26 Procédé de transmission de données de service de multidiffusion, procédé de mise en application de service de multidiffusion, station de base, station relais et terminal WO2009000208A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710076232.5 2007-06-27
CN200710076232.5A CN101335906B (zh) 2007-06-27 2007-06-27 多播业务信息发送方法、多播业务实现方法和通信设备

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WO2009000208A1 true WO2009000208A1 (fr) 2008-12-31

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PCT/CN2008/071443 WO2009000208A1 (fr) 2007-06-27 2008-06-26 Procédé de transmission de données de service de multidiffusion, procédé de mise en application de service de multidiffusion, station de base, station relais et terminal

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Publication number Priority date Publication date Assignee Title
CN101478372B (zh) * 2009-01-16 2011-09-14 清华大学 一种基于网络编码的合作无线多播方法
CN102668659B (zh) * 2010-01-13 2015-04-15 上海贝尔股份有限公司 中继辅助蜂窝系统中用于小区间干扰协调的方法和设备
WO2011097754A1 (fr) * 2010-02-11 2011-08-18 上海贝尔股份有限公司 Procédé et dispositif de transmission pour flux de codage évolutif dans un réseau relais
CN113016166B (zh) * 2018-11-14 2023-01-06 华为技术有限公司 一种多媒体业务的传输方法及装置

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CN1866782A (zh) * 2005-05-18 2006-11-22 华为技术有限公司 一种系统广播多播业务的实现方法
WO2007070588A2 (fr) * 2005-12-13 2007-06-21 Motorola, Inc. Systeme et procede pour la multidiffusion par communication courte distance de mobile a mobile

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CN1247026C (zh) * 2004-04-30 2006-03-22 清华大学 面向移动终端的多媒体广播系统及其实现方法
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Publication number Priority date Publication date Assignee Title
JP2005217677A (ja) * 2004-01-29 2005-08-11 Japan Radio Co Ltd セルラｉｐネットワークにおける中継ノードおよびマルチキャストデータ配信用のルーティング情報作成方法
CN1866782A (zh) * 2005-05-18 2006-11-22 华为技术有限公司 一种系统广播多播业务的实现方法
WO2007070588A2 (fr) * 2005-12-13 2007-06-21 Motorola, Inc. Systeme et procede pour la multidiffusion par communication courte distance de mobile a mobile

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CN101335906B (zh) 2013-09-11

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