Retransmission method and system for radio link control (RLC) layer

A retransmission and hybrid automatic retransmission technology, which is applied in the direction of error prevention/detection, network traffic/resource management, electrical components, etc. by using the return channel, can solve the problem of prolonging the service delay in the packet domain and the large retransmission delay in the RLC layer , Reduce the data download throughput rate of the TCP layer, etc., to achieve the effect of shortening the time and reducing the delay jitter

Inactive Publication Date: 2012-02-08
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of implementing RLC retransmission in the prior art causes a large retransmission delay at the RLC layer, prolongs the service delay in the packet domain, and reduces the data download throughput rate at the TCP layer

Method used

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  • Retransmission method and system for radio link control (RLC) layer
  • Retransmission method and system for radio link control (RLC) layer
  • Retransmission method and system for radio link control (RLC) layer

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Embodiment Construction

[0039] figure 1 The flow chart of the method for realizing TCP layer retransmission for the present invention, as figure 1 shown, including:

[0040] Step 100: the sending end sends RLC data through the HARQ entity.

[0041] The specific implementation of this step belongs to the prior art and is a technical means commonly used by those skilled in the art, and will not be repeated here.

[0042] Step 101: the receiving end fails to receive the RLC data, and notifies the sending end of the HARQ entity data sending failure.

[0043] In HSPA and HSPA+ networks, the sending end is a mobile terminal, and the receiving end includes RNC and NodeB; or, the sending end includes RNC and NodeB, and the receiving end is a mobile terminal;

[0044] In the LTE network, the sending end is a mobile terminal, and the receiving end is an eNodeB; or, the sending end is an eNodeB, and the receiving end is a mobile terminal.

[0045] In this step, the failure of the receiving end to receive th...

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Abstract

The invention discloses a retransmission method and a retransmission system for a radio link control (RLC) layer. The method comprises that: a transmitter transmits RLC data by a hybrid automatic repeat request (HARQ) entity, and a receiver fails to receive the RLC data and informs the transmitter of a data transmission failure of the HARQ entity; and the HARQ entity of the transmitter reports the data transmission failure to an RLC entity of the transmitter, and the RLC entity of the transmitter retransmits the RLC data failed to be transmitted by the HARQ entity of the transmitter. By the method and the system, interaction for the HARQ transmission failure is realized between the HARQ entity and RLC entity of the transmitter, so the message retransmission time of the RLC layer is effectively shortened, time delays of data services in high speed packet access (HSPA), evolved HSPA (HSPA+) and long term evolution (LTE) networks are effectively shortened, the fast message retransmission function of the RLC layer is realized, delay jitter caused by the wireless packet loss is reduced, and simultaneously, service downloading and uploading throughput is improved.

Description

technical field [0001] The invention relates to an automatic retransmission technology in a wireless communication system, in particular to a method and system for realizing RLC layer retransmission. Background technique [0002] With the development of wireless communication technology, the requirements for terminal download throughput are getting higher and higher. In the Long Term Evolution (LTE) network, it is clearly required that the downlink throughput rate is up to 100 Mbps, and the uplink throughput rate is up to 50 Mbps. [0003] Current file downloads, such as File Transfer Protocol (FTP) downloads, are usually carried by Transmission Control Protocol (TCP), and the TCP protocol is very sensitive to transmission delay. The download rate is inversely proportional to the transmission delay. Since the wireless network transmission delay (RTT) itself is greater than the wired network, RTT has a great impact on the download rate. If the RTT can be effectively shorten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/16H04W80/02
Inventor 杨金星
Owner ZTE CORP
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