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Method, system, device, receiving equipment and transmitting equipment for data retransmission

A data retransmission and retransmission technology, applied in the field of data retransmission, can solve the problems of heavy server tasks, increased delay, and inability to correct real-time services, so as to improve the transmission mechanism and improve reliability.

Inactive Publication Date: 2008-10-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the retransmission of the MBS server will cause the server's task to be too heavy, the delay will increase when the MBS server involves retransmission, and when a large number of errors occur , it may not be possible to correct real-time business

Method used

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  • Method, system, device, receiving equipment and transmitting equipment for data retransmission
  • Method, system, device, receiving equipment and transmitting equipment for data retransmission
  • Method, system, device, receiving equipment and transmitting equipment for data retransmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1. The base station retransmits the message through the unicast channel:

[0041] 11): The base station numbers the MBS message, and sends the numbered message to the mobile station;

[0042] 12): The mobile station detects whether a message is lost through the received message number, and reports the lost message information to the base station through the feedback channel if the message is detected to be lost;

[0043] 13): The base station independently establishes a retransmission channel of a unicast connection with the mobile station reporting the lost message, and the base station resends the lost message reported by the mobile station to the mobile station through the retransmission channel of the unicast connection At this time, the base station adopts transmission methods such as reducing the modulation and coding method and using different sub-channels. At the same time, ARQ (Automatic Repeat reQuest, automatic repeat request), HARQ (Hybrid ARQ, hy...

Embodiment 2

[0046] Embodiment 2, the base station retransmits the message through the MBS channel:

[0047] 21): The base station numbers the MBS message, and sends the numbered message to the mobile station;

[0048] 22): The mobile station detects whether a message is lost through the received message number, and reports the lost message information to the base station through the feedback channel if the message is detected to be lost;

[0049] 23): The base station additionally establishes a retransmission channel of the air interface multicast connection with the mobile station, and the base station resends the lost message to the mobile station through the retransmission channel of the multicast connection. At this time, the base station adopts a reduced modulation code mode, using different sub-channels, etc.

[0050] So far, the retransmission of the MBS message is completed, and after the retransmission of the message is completed, it further includes:

[0051] 24): The mobile s...

Embodiment 3

[0054] Embodiment 3, when the central scheduling unit requires the local scheduling unit to retransmit the lost message through the unicast channel, the retransmission process adopted is as follows:

[0055] 31): The central scheduling unit numbers the MBS message, and sends the numbered message to the mobile station through the local scheduling unit;

[0056] 32): The mobile station detects whether the MBS message is lost through the received message number, and if the message is detected to be lost, the lost message information is reported to the central dispatching unit through the local dispatching unit;

[0057] 33): The local dispatching unit separately establishes a retransmission channel of a unicast connection with the mobile station reporting the lost message according to the instructions of the central dispatching unit, and the central dispatching unit transmits the lost message through the retransmission channel of the unicast connection It can re-send to the mobil...

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Abstract

The invention pertains to the technical field of wireless communication and provides a method, a system, a device, a receiving device and a sending device for data retransmission. The method specifically comprises the following steps: a sending terminal numbers messages and sends the numbered messages to a receiving terminal; the receiving terminal detects whether messages are lost or not by the received message number, and if lost messages are detected, information about lost messages is submitted to the sending terminal by a feedback channel; the sending terminal retransmits the lost messages when receiving the information about lost messages. By adopting the invention, the phenomenon that lost messages can not be retransmitted during the process of message transmission in a wireless access network is avoided, the sending mechanism of broadcasting / multicast service of the wireless access network is perfected and the reliability of wireless transmission channels is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data retransmission method, system, device, receiving device and sending device. Background technique [0002] The development of global communication technology is changing with each passing day. In particular, the development speed and application fields of wireless communication technology have surpassed that of fixed communication technology. The most representative ones are cellular mobile communication and broadband wireless access. For example, the wireless metropolitan area network technology WiMAX (Worldwide Interoperability Microwave Access) mentioned in the IEEE802.16 standard, this technology proposes a new air interface standard for microwave and millimeter wave frequency bands, used to transmit wireless Signal, it can provide a high-speed Internet-oriented connection, using this technology, can provide broadband wireless access services with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/18H04L1/00H04L1/14H04L12/28H04L29/06
CPCH04L1/1867
Inventor 祝永进李修奕
Owner HUAWEI TECH CO LTD
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