WO2008131666A1 - Procédé, système, appareil, dispositif de réception et dispositif de transmission pour la retransmission de données - Google Patents

Procédé, système, appareil, dispositif de réception et dispositif de transmission pour la retransmission de données Download PDF

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Publication number
WO2008131666A1
WO2008131666A1 PCT/CN2008/070555 CN2008070555W WO2008131666A1 WO 2008131666 A1 WO2008131666 A1 WO 2008131666A1 CN 2008070555 W CN2008070555 W CN 2008070555W WO 2008131666 A1 WO2008131666 A1 WO 2008131666A1
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WIPO (PCT)
Prior art keywords
message
lost
unit
packet
retransmission
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PCT/CN2008/070555
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English (en)
French (fr)
Inventor
Yongjin Zhu
Xiuyi Li
Original Assignee
Huawei Technologies Co., Ltd.
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Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008131666A1 publication Critical patent/WO2008131666A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data retransmission method, system, device, and receiving device.
  • WiMAX Worldwide Interoperability Microwave Access
  • IEEE 802.16 the Worldwide Interoperability Microwave Access
  • Wireless signal which provides high-speed connection to the Internet. With this technology, it can provide broadband wireless connection within 50 km.
  • WiMAX Multicast and Broadcast Service
  • MBS is a flexible and effective mechanism and method for transmitting the same content to multiple receiving terminals in the IEEE 802.16 standard in order to use shared radio resources.
  • MBS can be used to transmit real-time streaming media services, and can also be used to transmit non-real-time file download services.
  • the transmitted content includes various types of data such as text, multimedia and streaming media.
  • Members of a multicast group can be statically configured or dynamically joined, and users can join or leave the multicast group at any time.
  • MBS supports two access modes: single base station access and multiple base station access.
  • MBS services are transmitted in a single base station; in a multi-base station access mode, base stations belonging to the same MBS area are capable of providing MBS services, and each MBS area has a unique identifier, which is located; All base stations in the same MBS area use the same CID (Customer Identity) and SA (Security Association) to transmit MBS services.
  • CID Customer Identity
  • SA Security Association
  • a multi-base station MBS is defined as a multicast service mode in which all MSs (Mobile Subscribe Stations) that are connected to such a multi-base station MBS connection can receive from any base station within a specified range at a specified time. Encrypted multicast or broadcast data stream.
  • the error correction capability and the retransmission mechanism of the application layer are used.
  • the MS application layer finds that there is a lost packet, it reports to the MBS server, and the MBS server according to the service type.
  • Different strategies are adopted to determine whether and how to retransmit. For real-time services, the server may choose to ignore or retransmit a small amount of data, and the data integrity requirements are high.
  • the inventors have found that at least the following problems exist in the prior art:
  • the retransmission of the MBS server causes the server to be too heavy, and the retransmission involved in the MBS server causes an increase in delay, and when a large number of errors occur When it is possible, the real-time business may not be corrected.
  • the embodiment of the invention provides a data retransmission method, system, device, receiving device and sending device, which can optimize the sending mechanism of the radio access network broadcast service, so as to improve the reliability of the wireless transmission channel.
  • the embodiment of the present invention provides a method for data retransmission, including:
  • the sender end numbers the packets, and sends the numbered packets to the receiving end.
  • the lost message is retransmitted through the retransmission channel.
  • the embodiment of the present invention also provides a system for data retransmission, including:
  • a sending unit configured to number the packet, send the numbered packet, and retransmit the lost packet when receiving the lost packet information
  • a message detecting unit configured to receive a message sent by the sending unit, and detect, according to the number of the message, whether there is any 4 text loss, if it is detected that 4 files are lost, the message information is lost through the feedback channel. Reported to the sending unit.
  • the embodiment of the present invention further provides a data retransmission transmitting device, including: a message sending unit, an information receiving unit, a forwarding unit, and a retransmission unit, where
  • a message sending unit configured to number the message, and send the numbered message to the receiving device
  • the information receiving unit is configured to receive the lost message information or the scheduling information sent by the receiving device, and the forwarding unit is configured to send the received lost message information.
  • the retransmission unit is configured to retransmit the lost packet when receiving the scheduling information.
  • An embodiment of the present invention further provides a receiving device for data retransmission, including:
  • a message receiving unit configured to receive a message after the sending device sends the number
  • the packet detecting unit is configured to detect, according to the number of the packet, whether there is a packet loss, and if a packet is detected to be lost, feed the lost packet information to the sending device.
  • An embodiment of the present invention further provides an apparatus for data retransmission, including:
  • a numbering unit configured to number the message
  • the sending unit is configured to deliver the numbered message
  • the management unit is configured to: when receiving the lost message information, send the scheduling information or obtain the lost message from the numbering unit, and retransmit the lost message.
  • the embodiment of the invention not only realizes retransmission of the lost packet, but also improves the transmission mechanism of the broadcast/multicast service of the radio access network, and improves Wireless transmission
  • Figure 1 is a flow chart of an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a system according to Embodiment 1 and Embodiment 2 of the present invention
  • FIG. 3 is a schematic diagram of a system according to Embodiment 3, Embodiment 4, and Embodiment 5;
  • FIG. 4 is a schematic diagram of a sending device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a receiving device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a device according to an embodiment of the present invention.
  • Embodiments of the present invention provide a data retransmission method, system, device, receiving device, and sending
  • FIG. 1 is a flowchart of a method for data retransmission in an embodiment of the present invention:
  • the sender end numbers the message, and sends the numbered message to the receiving end.
  • the receiving end detects, by the received packet number, whether there is a packet loss, if it is detected If the message is lost, the lost message information is reported to the sender through the feedback channel.
  • the sending end When receiving the lost packet information, the sending end retransmits the lost packet through the retransmission channel.
  • the foregoing is a general description of the embodiment of the present invention.
  • the following message is sent as an MBS message.
  • the sending end is a base station, and the receiving end is a mobile station as an example.
  • Embodiment 1 The base station retransmits the packet through the unicast channel:
  • the base station numbers the MBS message, and sends the numbered message to the mobile station;
  • the mobile station detects whether a packet is lost by the received packet number. If the packet is lost, the lost message is reported to the base station through the feedback channel.
  • the base station separately establishes a retransmission channel with a unicast connection between the mobile station reporting the lost message, and the base station retransmits the lost message reported by the mobile station to the mobile through the retransmission channel of the unicast connection.
  • the base station adopts a transmission mode of reducing modulation coding and using different subchannels, and at the same time, ARQ (Automatic Repeat ReQuest) and HARQ (Hybrid ARQ) can be used on the unicast connection. Pass) and other methods to ensure the reliability of retransmission.
  • the mobile station receives the retransmitted message, combines the received retransmission message with the received message before retransmission, and deletes the repeatedly received message.
  • Embodiment 2 The base station retransmits 4 texts through the MBS channel:
  • the base station numbers the MBS message, and sends the numbered message to the mobile station;
  • the base station additionally establishes a retransmission channel of the air interface multicast connection with the mobile station, and the base station retransmits the lost message to the mobile station by using a retransmission channel of the multicast connection, where the base station adopts a reduced modulation coding Mode, use different subchannels and other transmission methods.
  • the mobile station receives the retransmitted message, combines the received retransmission message with the received message before retransmission, and deletes the repeatedly received message.
  • the retransmission channel for establishing an air interface multicast connection with the mobile station includes: establishing a retransmission channel of an air interface multicast connection with all the mobile stations; or establishing and reporting a lost message A retransmission channel for air interface multicast connections between mobile stations.
  • the first embodiment and the second embodiment describe the retransmission of the single-base station MBS service at the transmitting end.
  • the following is an example of performing the service retransmission by the sending end as the local scheduling unit and the central scheduling unit, and is described in detail as follows:
  • Embodiment 3 Central scheduling The unit requires the local scheduling unit to retransmit the lost message through the unicast channel.
  • the central scheduling unit numbers the MBS packets, and sends the numbered packets to the mobile station through the local scheduling unit;
  • the mobile station detects the loss of the MBS packet by using the received packet number. If the packet is lost, the local scheduling unit reports the lost packet information to the central scheduling unit.
  • the local scheduling unit separately establishes a retransmission channel with a unicast connection between the mobile station reporting the lost message according to the indication of the central scheduling unit, and the central scheduling unit will lose the reported message through the retransmission channel of the unicast connection.
  • the text is resent to the mobile station that reported the lost message.
  • the local scheduling unit adopts a transmission mode of reducing the modulation coding mode and using different subchannels, and at the same time, the ARQ, HARQ, etc. can be used to ensure the retransmission on the unicast connection. reliability.
  • the mobile station receives the retransmitted message, combines the received retransmission message with the received message before retransmission, and deletes the repeatedly received message.
  • the local scheduling unit is a base station or a wireless transmission unit other than the base station, and the central scheduling unit is a unit for controlling the local scheduling unit.
  • Embodiment 4 The retransmission process when the local scheduling unit retransmits the packet through the MBS channel is as follows:
  • the central scheduling unit numbers the MBS packets, and sends the numbered packets to the mobile station through the local scheduling unit;
  • the mobile station detects the loss of the MBS packet by using the received packet number. If the packet is lost, the local scheduling unit reports the lost packet information to the central scheduling unit.
  • the central scheduling unit requires the local scheduling unit to additionally establish a retransmission channel for the air interface multicast connection with the mobile station, and the local scheduling unit retransmits the lost message to the mobile station through the retransmission channel in the form of MBS.
  • the local scheduling unit adopts a transmission mode in which the modulation coding mode is reduced, and different subchannels are used.
  • the retransmission of the MBS text has been completed. After the retransmission of the text is completed, it further includes: 44): The mobile station receives the retransmitted message, combines the received retransmission message with the received message before retransmission, and deletes the repeatedly received message.
  • the retransmission channel that establishes an air interface multicast connection with the mobile station includes: establishing a retransmission channel with an air interface multicast connection between all mobile stations; or establishing and reporting a lost message transmission
  • the local scheduling unit is a base station or a wireless transmission unit other than the base station, and the central scheduling unit is a unit for controlling the local scheduling unit.
  • Embodiment 5 The retransmission process when the central scheduling unit retransmits the packet through the MBS channel is as follows:
  • the central scheduling unit numbers the MBS packets, and sends the numbered packets to the mobile station through the local adjustment unit;
  • the mobile station detects whether there is a MBS packet loss by using the received packet number. If the 4th message is lost, the local scheduling unit reports the lost packet information to the central scheduling unit.
  • the central scheduling unit additionally establishes a retransmission channel of the air interface multicast connection with the mobile station, and the central scheduling unit retransmits the lost message to the mobile station through the retransmission channel in the form of MBS.
  • the central scheduling unit adopts a transmission mode such as reducing the modulation coding method and using different subchannels.
  • the mobile station receives the retransmitted message, combines the received retransmission message with the received message before retransmission, and deletes the repeatedly received message.
  • the retransmission channel that establishes an air interface multicast connection with the mobile station includes: establishing a retransmission channel of an air interface multicast connection with the mobile station; or establishing and reporting a lost message A retransmission channel for air interface multicast connections between mobile stations.
  • the local scheduling unit is a base station or a wireless transmission unit other than the base station, and the central scheduling unit is a unit for controlling the local scheduling unit.
  • the retransmission channel for establishing a unicast connection with the mobile station or
  • the retransmission channel of the air interface multicast connection can be established when retransmission is required, or can be established at the same time as the MBS channel is established, for example, the numbered message is sent to the mobile station before establishment.
  • FIG. 2 it is a schematic diagram of a system provided by Embodiment 1 and Embodiment 2 of the present invention:
  • the wireless network-based data retransmission system includes: a sending unit 201, configured to number the packets, and send the numbered packets, and receive the lost packets. Retransmitting the lost message when the information is used;
  • the message detecting unit 202 is configured to receive the packet sent by the sending unit 201, and detect whether a packet is lost according to the packet number. If a packet is detected to be lost, the packet information is lost through the feedback channel. To the transmitting unit 201.
  • the text detecting unit 202 is at least one mobile station (in the embodiment, the first mobile station 203, the second mobile station 204, and the third mobile station 205 are taken as an example, but are not limited thereto), and are received and checked.
  • the transmitting unit sends the message in the manner of the MBS. Therefore, when the sending unit sends the message, all the mobile stations can receive the data. For example, when the base station sends the numbered message, the first mobile station 203, Both the mobile station 204 and the third mobile station 205 can receive the numbered message.
  • the system may perform retransmission of the data based on the wireless network.
  • the system may further include: a merged message unit, configured to receive the retransmitted message received by the receiving unit 202 and the retransmitted message. The text is merged to delete the repeatedly received message.
  • the sending unit may be a single base station, or may be other devices with the same function.
  • FIG. 3 is a schematic diagram of a system according to Embodiment 3, Embodiment 4, and Embodiment 5 of the present invention.
  • Embodiment 3 of the present invention, Embodiment 4, Embodiment 5 provides a wireless network-based data retransmission system, including a sending unit and a report.
  • the text detecting unit 202 in this embodiment, the sending unit includes: a central scheduling unit 301 and a local scheduling unit 302.
  • the central scheduling unit 301 is configured to number the packets, and send the numbered packets, and send the lost packet information or the scheduling information to be retransmitted when receiving the lost packet information;
  • the unit 302 is configured to: when receiving the lost packet information that needs to be retransmitted, send the lost packet information to the central scheduling unit 301, or receive the tone sent by the central scheduling unit 301.
  • the lost message is retransmitted through the retransmission channel.
  • the packet detecting unit 202 is configured to receive the packet from the local scheduling unit 302, and detect whether a packet is lost according to the packet number. If a packet is lost, the lost packet information is reported to the central scheduling through the feedback channel. Unit 301.
  • the central scheduling unit 301 may be located on the network element entity, or may be an independently existing network element;
  • the local scheduling unit 302 can be located at or on a wireless transmission entity other than the base station.
  • the central scheduling unit 301 and the local scheduling unit 302 can be placed in a sending unit, each of which includes a central scheduling unit and at least one local scheduling unit.
  • the local scheduling unit 302 is: Unit 303, second local scheduling unit 304, third local scheduling unit 305
  • the message detecting unit 202 includes at least one mobile station. Since the sending unit sends the message by using the MBS manner, when the sending unit sends the message, all the mobile stations can receive the data, for example, when the local scheduling is performed. When the unit 302 sends the numbered message, the first mobile station 203, the second mobile station 204, and the third mobile station 205 can simultaneously receive the first local scheduling unit 303, the second local scheduling unit 304, and the third local. The message sent by the scheduling unit 305.
  • the system may further include: a merged message unit, configured to retransmit the received message received by the message detecting unit 202 and the received message before retransmission.
  • the text is merged to delete the repeatedly received message, and each mobile station corresponds to one merged message unit.
  • FIG. 4 it is a schematic diagram of a sending device according to an embodiment of the present invention.
  • the sending device includes: a message sending unit 400, an information receiving unit 401, a forwarding unit 402, and a retransmission unit 403, where the message sending unit 400 is used. And numbering the message, and sending the numbered message to the receiving device;
  • the information receiving unit 401 is configured to receive the lost message information that needs to be retransmitted by the receiving device, or scheduling information, and send the lost packet information that needs to be retransmitted to the forwarding unit 402, or send the scheduling information to Retransmission unit 403;
  • the forwarding unit 402 is configured to receive the lost packet information that needs to be retransmitted, and send the lost packet information.
  • a retransmission unit 403 configured to: after receiving the scheduling information by the received information receiving unit 401,
  • the device may be a base station or a wireless transmission device other than the base station.
  • FIG. 5 is a schematic diagram of a receiving device according to an embodiment of the present invention.
  • the receiving device includes: a packet receiving unit 501, configured to receive a packet after a sending device sends a number;
  • a packet detecting unit 502 configured to detect, according to the number of the packet, whether a packet is lost, if If it is detected that there is a loss, the lost message information is fed back to the sending device.
  • the receiving device further includes:
  • the merging message unit 503 is configured to combine the retransmission message received by the message receiving unit 501 with the message received before the retransmission, and delete the repeatedly received message.
  • the device is a mobile station, or a wireless receiving terminal other than the mobile station.
  • FIG. 6 is a schematic diagram of a device according to an embodiment of the present invention, including:
  • the numbering unit 601 is configured to number the message
  • the sending unit 602 is configured to obtain the numbered message from the numbering unit 601, and deliver the numbered message;
  • the management unit 603 is configured to: when receiving the lost message information, send the scheduling information to the subordinate device of the device, notify the subordinate device team that the lost message is retransmitted, or obtain the lost message from the numbering unit, Retransmit the lost message.
  • the device may be located on the network element entity or may exist separately.
  • the sender sends the message in broadcast/multicast mode.
  • the packet is numbered.
  • the receiver can detect the loss of the packet after detecting the received packet number. If the packet is lost, the receiver notifies the sender to retransmit the lost packet.
  • the receiving end combines the received retransmission message with the received message before retransmission, and deletes the repeatedly received message. Therefore, the phenomenon that the radio access network cannot retransmit the lost message during the broadcast/multicast transmission of the message is avoided, and the broadcast/multicast transmission mechanism of the radio access network is improved.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Description

一种数据重传的方法、 系统、 装置、 接收设备 ¾JL送设备
本申请要求于 2007 年 4 月 26 日提交中国专利局、 申请号为 200710097000.8、 发明名称为"一种数据重传的方法、 系统、 装置、 接收设备 及发送设备"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技术领域, 尤其涉及一种数据重传的方法、 系统、 装 置、 接收设备^送设备。
背景技术
全球通信技术的发展日新月异,尤其无线通信技术的发展速度与应用领域 ) 已经超过了固定通信技术,其中最具代表性的有蜂窝移动通信、宽带无线接入。
例如 , IEEE802.16 标准提到的无线城域网技术 WiMAX ( Worldwide Interoperability Microwave Access, 微波接入全球互通), 这种技术针对微波和 毫米波频段提出了一种新的空中接口标准, 用于传输无线信号, 它能提供面向 互联网的高速连接, 使用这种技术, 可以提供 50公里范围以内的宽带无线接
> 入服务, 并且 WiMAX支持 MBS ( Multicast and Broadcast Service , 多播 /广播 业务)。
MBS是 IEEE 802.16标准中为了使用共享的无线资源,发送同样的内容到 多个接收终端, 而提供灵活、 有效的机制和方法。 MBS 可以用于传输实时的 流媒体业务,也可以用于传输非实时的文件下载服务,传输的内容包括各种数 ) 据类型, 如文本、 多媒体和流媒体等。 多播组的成员可以是静态配置, 也可以 是动态加入, 用户可以在任何时候加入或离开多播组。
MBS 支持两种接入方式: 单基站接入和多基站接入。 在单基站接入方式 下, MBS业务在单个基站内传输; 在多基站接入方式下,属于同一个 MBS 区 域的基站都有能力提供 MBS业务, 每个 MBS区域有一个的唯一标识, 处于 ; 同一个 MBS区域内的所有基站使用相同的 CID ( Customer Identity,顾客身份) 和 SA ( Security Association, 安全标准)传输 MBS业务。 多基站 MBS被定义 为一种多播业务方式, 在这种方式下所有加入到这种多基站 MBS连接的 MS ( Mobile Subscribe Station, 移动台 )在指定的时间可以从指定范围内的任何 基站接收经过加密处理的多播或广播数据流。 在现有技术中,当以 MBS方式传输数据发生错误时依赖应用层的纠错能力 和重传机制, 例如, 当 MS应用层发现有丢失报文后上报到 MBS服务器, MBS 服务器根据业务种类的不同采取不同的策略确定是否需要以及如何重传,对于 实时业务,服务器可以选择忽略或重传少量的数据,对数据完整性要求高的非
> 实时业务类型进行重传。
在实现本发明的过程中,发明人发现现有技术中至少存在如下问题: MBS 服务器进行重传会导致服务器的任务太重, 当 MBS服务器涉及的重传导致延 时增加, 并且当大量错误发生时, 可能会无法纠正实时业务。
发明内容
) 本发明实施例提供一种数据重传的方法、 系统、 装置、接收设备及发送设 备,能够优化无线接入网广播业务的发送机制,以提高无线传输通道的可靠性。
为此, 本发明的目的是通过以下技术方案实现的:
本法明实施例提供了一种数据重传的方法, 包括:
发送端对报文进行编号, 并将编号后的报文发送到接收端;
> 当接收到所述接收端反馈的丢失报文信息时,通过重传通道对丢失的报文 进行重传。
本法明实施例还提供了一种数据重传的系统, 包括:
发送单元, 用于对报文进行编号, 并发送编号后的报文, 以及在接收到丢 失报文信息时, 对所述丢失的报文进行重传;
) 报文检测单元, 用于接收发送单元发送的报文, 并根据所述报文的编号检 测是否有 4艮文丢失,如果检测到有 4艮文丢失, 则通过反馈通道将丢失报文信息 上报给发送单元。
本发明实施例还提供了一种数据重传的发送设备, 包括: 报文发送单元、 信息接收单元、 转发单元和重传单元, 其中
> 报文发送单元, 用于对报文进行编号, 并向接收设备发送所述编号后的报 文;
信息接收单元, 用于接收所述接收设备发送的丢失报文信息或调度信息; 转发单元 , 用于将接收的所述丢失报文信息发送出去;
重传单元, 用于接收到调度信息时, 对丢失的报文进行重传。 本发明实施例还提供了一种数据重传的接收设备, 包括:
报文接收单元, 用于接收发送设备发送编号后的报文;
报文检测单元, 用于根据所述报文的编号检测是否有报文丢失,如果检测 到有报文丢失, 则向所述发送设备反馈丢失报文信息。
> 本发明实施例还提供了一种数据重传的装置, 包括:
编号单元, 用于对报文进行编号;
下发单元, 用于对编号后的报文进行下发;
管理单元, 用于在接收到丢失报文信息时, 下发调度信息或者从编号单元 获取丢失的报文, 并对所丢失的报文进行重传。
) 以上技术方案可以知, 由于发送端在对报文进行发送之前对报文进行编 号 ,因此接收端通过对接收到的报文编号进行检测后能够检测出是否有报文丢 失, 如果有报文丢失, 接收端通知发送端对丢失的报文进行重传。 由此可见, 无线接入网在传输报文的过程中,本发明实施例不但实现了对丢失报文进行重 传, 而且还完善了无线接入网的广播 /多播业务的发送机制, 提高无线传输通
> 道的可靠性。
附图说明
图 1为本发明实施例的流程图;
图 2为本发明实施例一、 实施例二提供的系统示意图;
图 3为本发明实施例三、 实施例四、 实施例五提供的系统示意图; ) 图 4为本发明实施例提供的发送设备示意图;
图 5为本发明实施例提供的接收设备示意图;
图 6为本发明实施例提供的装置示意图。
具体实施方式
本发明实施例提供了一种数据重传的方法、 系统、 装置、接收设备及发送
> 设备, 为使本发明的目的、技术方案及优点更加清楚明白, 以下参照附图并举 实施例, 对本发明进一步详细说明。
参见图 1 , 为本发明实施例中数据重传的方法的流程图:
101 : 发送端对报文进行编号, 将编号后的报文发送到接收端;
102: 接收端通过接收到的报文编号检测是否有报文丢失, 如果检测到有 艮文丢失, 则通过反馈通道将丢失报文信息上报给发送端;
103: 发送端接收到所述丢失报文信息时, 通过重传通道对丢失的报文进 行重传。
以上对本发明实施例进行了总体描述, 下面以发送的报文为 MBS报文,
> 发送端为基站, 接收端为移动台为例, 分别列举实施例进行伴细说明:
实施例一、 基站通过单播通道重传报文:
11 ) : 基站对 MBS报文进行编号, 并将编号后的报文发送给移动台;
12 ) : 移动台通过接收到的报文编号检测是否有报文丢失, 如检测到报文 丢失, 通过反馈通道将丢失报文信息上报给基站;
) 13 ): 基站单独建立一条与上报丢失报文的移动台之间的单播连接的重传 通道,基站通过单播连接的重传通道将移动台上报的丢失的报文重新发送给该 移动台, 此时基站采用降低调制编码方式、使用不同的子信道等发送方式, 同 时在该单播连接上可以使用 ARQ ( Automatic Repeat reQuest , 自动重发请求)、 HARQ ( Hybrid ARQ, 混合自动请求重传)等方式保证重传的可靠性。
> 至此完成了对 MBS报文的重传, 在完成报文的重传后进一步包括:
14 ): 移动台接收重传的报文, 将接收的重传报文与重传之前接收的报文 合并, 删除重复接收的报文。
实施例二、 基站通过 MBS通道重传4艮文:
21 ): 基站对 MBS报文进行编号, 并将编号后的报文发送给移动台; ) 22 ): 移动台通过接收到的报文编号检测是否有报文丢失, 如检测到报文 丢失, 通过反馈通道将丢失报文信息上报给基站;
23 ) : 基站另外建立与移动台之间的空口多播连接的重传通道, 基站通过 多播连接的重传通道将所述丢失的报文重新发送给移动台,此时基站采用降低 调制编码方式、 使用不同的子信道等发送方式。
> 至此完成了对 MBS报文的重传, 在完成报文的重传后进一步包括:
24 ) : 移动台接收重传的报文, 将接收的重传报文与重传之前接收的报文 合并, 删除重复接收的报文。
其中, 所述建立与移动台之间的空口多播连接的重传通道, 包括: 建立与 所有的移动台之间的空口多播连接的重传通道; 或者, 建立与上报丢失报文的 移动台之间的空口多播连接的重传通道。
上述实施例一和实施例二描述了发送端为单基站 MBS业务的重传, 下面 以发送端为本地调度单元和中心调度单元进行业务重传为例, 进行详细说明: 实施例三、中心调度单元要求本地调度单元通过单播通道重传丢失的报文
> 时, 采用的重传流程如下:
31 ) : 中心调度单元对 MBS报文进行编号,并将编号后的报文通过本地调 度单元发送给移动台;
32 ) :移动台通过接收到的报文编号检测是否有 MBS报文丢失,如果检测 到 4艮文丢失, 通过本地调度单元将丢失报文信息上报给中心调度单元;
) 33 ): 本地调度单元根据中心调度单元的指示单独建立一个与上报丢失报 文的移动台之间的单播连接的重传通道,中心调度单元通过单播连接的重传通 道将丢失的报文重新发送到上报丢失报文的移动台,此时本地调度单元采用降 低调制编码方式、使用不同的子信道等发送方式, 同时在该单播连接上可以使 用 ARQ、 HARQ等方式保证重传的可靠性。
> 至此完成了对 MBS报文的重传, 在完成报文的重传后进一步包括:
34 ): 移动台接收重传的报文, 将接收的重传报文与重传之前接收的报文 合并, 删除重复接收的报文。
其中, 所述本地调度单元为基站或者除基站以外的无线传输单元, 中心调 度单元为用于控制本地调度单元的单元。
) 实施例四、 本地调度单元通过 MBS通道重传报文时的重传流程如下:
41 ) : 中心调度单元对 MBS报文进行编号,并将编号后的报文通过本地调 度单元发送给移动台;
42 ) :移动台通过接收到的报文编号检测是否有 MBS报文丢失,如果检测 到 4艮文丢失, 通过本地调度单元将丢失报文信息上报给中心调度单元;
) 43 ): 中心调度单元要求本地调度单元另外建立与移动台之间的空口多播 连接的重传通道, 本地调度单元以 MBS的形式通过重传通道将丢失的报文重 新发送到移动台,此时本地调度单元采用降低调制编码方式、使用不同的子信 道等发送方式。
至此完成了对 MBS 文的重传, 在完成 文的重传后进一步包括: 44 ): 移动台接收重传的报文, 将接收的重传报文与重传之前接收的报文 合并, 删除重复接收的报文。
其中, 所述建立与移动台之间的空口多播连接的重传通道, 包括: 建立与 所有移动台之间的空口多播连接的重传通道; 或者,建立与上报丢失报文的移
) 动台之间的空口多播连接的重传通道。
其中, 所述本地调度单元为基站或者除基站以外的无线传输单元, 中心调 度单元为用于控制本地调度单元的单元。
实施例五、 中心调度单元通过 MBS通道重传报文时的重传流程如下:
51 ) : 中心调度单元对 MBS报文进行编号,并将编号后的报文通过本地调 ) 度单元发送给移动台;
52 ) :移动台通过接收到的报文编号检测是否有 MBS报文丢失,如果检测 到 4艮文丢失, 通过本地调度单元将丢失报文信息上报给中心调度单元;
53 ): 中心调度单元另外建立与移动台之间的空口多播连接的重传通道, 中心调度单元以 MBS的形式通过重传通道将丢失的报文重新发送到移动台,
> 此时中心调度单元采用降低调制编码方式、 使用不同的子信道等发送方式。
至此完成了对 MBS 文的重传, 在完成 文的重传后进一步包括:
54 ): 移动台接收重传的报文, 将接收的重传报文与重传之前接收的报文 合并, 删除重复接收的报文。
其中, 所述建立与移动台之间空口多播连接的重传通道, 包括: 建立与所 ) 有的移动台之间的空口多播连接的重传通道; 或者,建立与上报丢失报文的移 动台之间的空口多播连接的重传通道。
其中, 所述本地调度单元为基站或者除基站以外的无线传输单元, 中心调 度单元为用于控制本地调度单元的单元。
其中 ,上述各实施例中所述建立与移动台之间的单播连接的重传通道或者
> 空口多播连接的重传通道可以在需要重传时建立, 也可以在 MBS通道建立的 同时建立, 例如将编号后的报文发送到移动台之前建立等。
上述实施例描述了以 MBS形式发送报文, 出现报文丢失的情况下的重传 机制, 完善了无线接入网基于 MBS模式下的发送机制。 下面针对本发明实施 例提供的系统示意图进行详细说明: 参见图 2, 为本发明实施例一、 实施二提供的系统示意图:
本发明实施例一、 实施例二提供的基于无线网络的数据重传系统, 包括: 发送单元 201, 用于对报文进行编号, 并将编号后的报文发送出去, 当接 收到丢失报文信息时, 对所述丢失的报文进行重传;
> 报文检测单元 202, 用于接收发送单元 201发送的所述报文, 并根据报文 编号检测是否有报文丢失,如果检测到有报文丢失, 则通过反馈通道将丢失报 文信息反馈给发送单元 201。
其中, 所述 文检测单元 202为至少一个移动台(本实施例以第一移动台 203、 第二移动台 204、 第三移动台 205为例, 但并不限于此), 由于接收并检 ) 测发送单元采用 MBS的方式发送的报文, 因此当发送单元发送报文时, 所有 的移动台都可以接收到数据, 例如, 当基站发送编号后的报文时, 第一移动台 203、 第二移动台 204、 第三移动台 205都能接收到编号后的报文。
上述系统可完成基于无线网络的数据的重传, 为了进一步优化, 所述系统 可进一步包括:合并报文单元, 用于将接收单元 202接收的重传报文与重传之 ) 前接收的报文合并, 删除重复接收的报文。
其中, 所述发送单元可以为单基站, 也可以为具体相同功能的其它设备。 参见图 3, 为本发明实施例三、 实施四、 实施例五提供的系统示意图: 本发明实施例三、实施四、实施例五提供的基于无线网络的数据重传系统, 包括发送单元和报文检测单元 202, 在该实施例中, 所述发送单元包括: 中心 ) 调度单元 301和本地调度单元 302。
中心调度单元 301, 用于对报文进行编号, 并将编号后的报文发送出去, 当接收到丢失报文信息时, 下发需要重传的丢失报文信息或者下发调度信息; 本地调度单元 302, 用于在接收到需要重传的丢失报文信息时, 将所述丢 失报文信息发送到中心调度单元 301 , 或者接收到中心调度单元 301发送的调
> 度信息时, 通过重传通道对丢失的报文进行重传。
报文检测单元 202, 用于从本地调度单元 302接收报文, 并根据报文编号 检测是否有报文丢失,如果检测到有报文丢失, 则通过反馈通道将丢失报文信 息上报给中心调度单元 301。
其中, 中心调度单元 301可位于网元实体上, 也可以是独立存在的网元; 本地调度单元 302可位于基站或者除基站以外的无线传输实体上。中心调度单 元 301和本地调度单元 302可置于一个发送单元中,每个发送单元包含一个中 心调度单元和至少一个本地调度单元, 本实施例中, 所述本地调度单元 302 以: 第一本地调度单元 303、 第二本地调度单元 304、 第三本地调度单元 305
> 为例, 但并不限于此。
其中, 所述报文检测单元 202 包含至少一个移动台, 由于发送单元采用 MBS 的方式发送报文, 因此当发送单元发送报文时, 所有的移动台都可以接 收到数据,例如, 当本地调度单元 302发送编号后的报文时, 第一移动台 203、 第二移动台 204、 第三移动台 205都能够同时接收到第一本地调度单元 303、 ) 第二本地调度单元 304、 第三本地调度单元 305发送的报文。
上述系统可完成基于无线网络的数据的重传, 为了进一步优化, 所述系统 可进一步包括:合并报文单元, 用于将报文检测单元 202接收的重传报文与重 传之前接收的报文合并,删除重复接收的报文, 并且每个移动台对应一个合并 报文单元。
> 参见图 4, 为本发明实施例提供的发送设备示意图, 所述发送设备包括: 报文发送单元 400、 信息接收单元 401, 转发单元 402、 重传单元 403, 其中 报文发送单元 400, 用于对报文进行编号, 并向接收设备发送所述编号后 的报文;
信息接收单元 401, 用于接收所述接收设备发送需要重传的丢失报文信息 ) 或调度信息, 并将所述需要重传的丢失报文信息发送给转发单元 402, 或者将 调度信息发送给重传单元 403;
转发单元 402, 用于接收所述需要重传的丢失报文信息, 并发送所述丢失 报文信息;
重传单元 403 , 用于在接收到信息接收单元 401发送所述调度信息后 , 对
> 丢失的报文进行重传。
其中 , 所述设备可以为基站或者除基站以外的无线传输设备。
参见图 5, 为本发明实施例提供的接收设备示意图, 所述接收设备包括: 报文接收单元 501 , 用于接收发送设备发送编号后的报文;
报文检测单元 502, 用于根据所述报文的编号检测是否有报文丢失, 如果 检测到有 ^艮文丢失, 则向所述发送设备反馈丢失报文信息。
其中, 所述接收设备进一步包括:
合并报文单元 503, 用于将报文接收单元 501接收的重传报文与重传之前 接收的报文合并, 删除重复接收的报文。
> 其中, 所述装置为移动台, 或者除移动台以外的无线接收终端。
参见图 6, 为本发明实施例提供的装置示意图, 包括:
编号单元 601 , 用于对报文进行编号;
下发单元 602, 用于从编号单元 601获取编号后的报文, 并对编号后的报 文进行下发;
) 管理单元 603 , 用于在接收到丢失报文信息时, 向所述装置的下属设备下 发调度信息,通知下属设备队丢失的报文进行重传,或者从编号单元获取丢失 的报文, 对所丢失的报文进行重传。
其中, 所述装置可位于网元实体上, 也可以单独存在。
以上实施例可以看出, 由于发送端在以广播 /多播的方式对报文进行发送
> 之前对报文进行编号,因此接收端通过对接收到的报文编号进行检测后能够检 测出是否有报文丢失,如果有报文丢失,接收端通知发送端对丢失的报文进行 重传,接收端将接收的重传报文与重传之前接收的报文合并,删除重复接收的 报文。 因此, 避免了无线接入网在以广播 /多播的方式传输报文的过程中不能 对丢失报文进行重传的现象发生 , 完善了无线接入网的广播 /多播的发送机制 ,
) 提高无线传输通道的可靠性。
以上对本发明所提供的一种数据重传的方法、 系统、 装置、接收设备及发 送设备进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进 行了阐述, 以上实施例的说明只是用于帮助理解本发明的方法及其核心思想; 同时, 对于本领域的一般技术人员, 依据本发明的思想, 在具体实施方式及应
> 用范围上均会有改变之处, 综上所述,本说明书内容不应理解为对本发明的限 制。

Claims

权 利 要 求
1、 一种数据重传的方法, 其特征在于, 包括:
发送端对报文进行编号, 并将编号后的报文发送到接收端;
当接收到所述接收端反馈的丢失报文信息时,通过重传通道对丢失的报文 ; 进行重传。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 接收端接收发送端发送的报文,并根据所述报文的编号检测是否有报文丢 失, 若是, 则通过反馈通道将丢失报文信息上报给发送端。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述通过重传通道对 ) 丢失的报文进行重传, 包括:
发送端与上报丢失报文的接收端之间建立下行单播连接的重传通道; 发送端通过所述重传通道将丢失的报文重新发送给所述接收端。
4、 根据权利要求 1所述的方法, 其特征在于, 所述通过重传通道对丢失 的报文进行重传, 包括:
> 发送端与接收端之间建立空口多播连接的重传通道,并以多播的形式将所 述丢失的报文重新发送给所述接收端。
5、 根据权利要求 4所述的方法, 其特征在于, 所述发送端与接收端之间 建立空口多播连接的重传通道, 包括:
发送端与所有的接收端之间建立空口多播连接的重传通道; 或者, ) 发送端与上报丢失报文的接收端之间建立空口多播连接的重传通道。
6、 根据权利要求 1所述的方法, 其特征在于, 所述将编号后的报文发送 到接收端之前, 进一步包括: 发送端与接收端之间建立重传通道。
7、 根据权利要求 1所述的方法, 其特征在于, 所述通过重传通道对丢失 的报文进行重传, 进一步包括:
> 接收端接收重传的报文,并将所述重传报文与重传之前接收的报文进行合 并, 删除重复接收的报文。
8、 一种数据重传的系统, 其特征在于, 包括:
发送单元, 用于对报文进行编号, 并发送编号后的报文, 以及在接收到丢 失报文信息时, 对所述丢失的报文进行重传; 报文检测单元, 用于接收发送单元发送的报文, 并根据所述报文的编号检 测是否有 "^文丢失,如果检测到有 4艮文丢失, 则通过反馈通道将丢失报文信息 上报给发送单元。
9、 根据权利要求 8所述的系统, 其特征在于, 所述发送单元为单基站。
> 10、 根据权利要求 8所述的系统, 其特征在于, 所述发送单元包括: 中心调度单元, 用于对报文进行编号, 并将编号后的报文发送出去; 以及 当接收到丢失报文信息时, 下发需要重传的丢失报文信息或者下发调度信息; 本地调度单元, 用于在接收到需要重传的丢失报文信息时,将所述丢失报 文信息发送到中心调度单元; 或者接收到中心调度单元发送的调度信息时,根 ) 据调度信息对丢失的报文进行重传。
11、 根据权利要求 10所述的系统, 其特征在于, 所述本地调度单元为基 站, 或者除基站以外的无线传输实体。
12、 根据权利要求 8所述的系统, 其特征在于, 所述系统进一步包括: 合并报文单元,用于将报文检测单元接收的重传报文与重传之前接收的报
> 文合并, 删除重复接收的报文。
13、 一种数据重传的发送设备, 其特征在于, 包括: 报文发送单元、 信息 接收单元、 转发单元和重传单元, 其中
报文发送单元, 用于对报文进行编号, 并向接收设备发送所述编号后的报 文;
) 信息接收单元,用于接收所述接收设备发送的需要重传丢失的报文信息或 调度信息, 并将所述需要重传的丢失报文信息发送给转发单元,或者将调度信 息发送给重传单元;
转发单元, 用于接收所述需要重传的丢失报文信息, 并发送所述丢失报文 信息;
> 重传单元, 用于根据接收到的调度信息对丢失的报文进行重传。
14、 一种数据重传的接收设备, 其特征在于, 包括:
报文接收单元, 用于接收发送设备发送编号后的报文;
报文检测单元, 用于根据所述报文的编号检测是否有报文丢失,如果检测 到有报文丢失, 则向所述发送设备反馈丢失报文信息。
15、 根据权利要求 14所述的设备, 其特征在于, 所述设备进一步包括: 合并报文单元,用于将报文接收单元接收的重传报文与重传之前接收的报 文合并, 删除重复接收的报文。
16、 一种数据重传的装置, 其特征在于, 包括:
编号单元, 用于对报文进行编号;
下发单元, 用于对编号后的报文进行下发;
管理单元, 用于在接收到丢失报文信息时, 下发调度信息或者从所述编号 单元获取丢失的报文, 并对所丢失的报文进行重传。
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