Data transmission method, system and transmitting terminal

A data transmission method and technology at the sending end, applied in the direction of digital transmission system, transmission system, data exchange network, etc., can solve the problems of big data transmission delay, time delay, delay time, etc., and achieve the effect of avoiding transmission delay

Inactive Publication Date: 2009-01-07
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

Therefore, if the last data packet or the last several consecutive data packets are discarded when scheduling data packets before, the receiving end MAC layer will find that the TSN of the data packet is consistent with itself when receiving the data packet from the sending end MAC layer. The TSNs of the correctly received data packets are not continuous, causing the MAC layer at the receiving end to wait for one or more times the set waiting time before submitting the received data packets to the RLC layer at the receiving end, thereby delaying The RLC layer at the receiving end knows the time when the data has not been received, which also delays the time for the RLC layer at the receiving end to obtain the unreceived data through the RLC layer retransmission process, resulting in a large data transmission delay

Method used

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  • Data transmission method, system and transmitting terminal
  • Data transmission method, system and transmitting terminal
  • Data transmission method, system and transmitting terminal

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0023] In the embodiment of the present invention, when the sending end re-schedules data packets for the receiving end, if it is determined that the last data packet sent was discarded when scheduling data packets before, it is further determined that when scheduling data packets before, the data packets from the last data packet The maximum value of the TSN corresponding to the data packet that has not been discarded from the beginning, and the TSN is set for the rescheduled data packet from the maximum value plus 1.

[0024] The method may further include:

[0025] The sending end maintains a state parameter for each data packet sent to the receiving end, and when it is determined to discard the data packet, the state parameter of t...

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Abstract

The embodiment of the invention discloses a method for transmitting data, comprising the following steps: when a sender schedules data packets again for a receiver, if the last sent data packet is determined to be discarded when former data packets schedule is carried out, the maximum value of sending sequence numbers TSN corresponding to the non-discarded data packets before the last data packet is further determined when former data packets schedule is carried out, TSN is set for the data packets that are scheduled again by adding 1 to the maximum value. The embodiment of the invention also discloses a data transmission system and a sender, and the sender comprises a sender MAC layer processing unit and a sender RLC layer processing unit. By adopting the method, the system and the sender disclosed by the embodiment of the invention, time delay of data transformation can be reduced.

Description

technical field [0001] The invention relates to automatic retransmission technology in wireless communication, in particular to a data transmission method, system and sending end. Background technique [0002] In a multi-process HARQ, Hybrid Automatic Repeat reQuest (HARQ, Hybrid Automatic Repeat reQuest) system, the media access control (MAC, Media Access Control) layer of the sending end needs to set the transmission sequence number (TSN, Transmission Sequence Number), which is used as the sequence recovery of the received data packets by the MAC layer of the receiving end. The receiving end MAC layer receives data packets from the sending end MAC layer, reorders the received data packets, and submits the sorted data packets to the receiving end Radio Link Control (RLC, Radio Link Control) layer in sequence. [0003] figure 1 It is a schematic diagram of the process of data transmission in the prior art. During the data transmission process, the maximum number of retrans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00H04L12/56H04L12/861
Inventor 李勇彭木根王文博
Owner TD TECH COMM TECH LTD
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