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Transmission layer retransmission method and system

A transmission layer and retransmission technology, applied in the field of network communication, can solve the problems of data loss and difficult control of waiting time, and achieve the effect of avoiding data loss, providing transmission reliability, and improving the utilization rate of air interface resources.

Inactive Publication Date: 2010-10-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In the above method, since the detection method and detection time of NACK->ACK and DTX->ACK phenomena are different, the waiting time of the HARQ at the sending end is not easy to control, so that the detection of NACK->ACK and DTX->ACK will occur. >The phenomenon of deleting the RLC PDU before the ACK phenomenon, resulting in data loss

Method used

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  • Transmission layer retransmission method and system
  • Transmission layer retransmission method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0080] Embodiment 1. The specific implementation process of the receiving end triggering and generating the status report according to the timer includes the following steps:

[0081] Step 1. The receiving end establishes an RLC entity, and starts a first timer, and the first timer starts timing.

[0082] The first timer is set as Timer_Status, the minimum time interval for the receiving end to send the status report is Min_Status_Duration, and the maximum time interval for the receiving end to send the status report is Max_Status_Duration.

[0083]Go to step 2, the receiving end judges whether it has received the polling instruction sent by the sending end, and whether the current timing time of the timer reaches Max_Status_Duration, if the receiving end receives the polling instruction sent by the sending end, and the current time of the timer If the timing time has not reached Max_Status_Duration, go to step 3.

[0084] In step 3, the receiving end judges whether the curre...

Embodiment 2

[0088] Embodiment 2, the specific implementation process of the receiving end triggering and generating the status report according to the counter includes the following steps:

[0089] Step 1. The receiving end establishes an RLC entity and starts a counter, and the counter increases by one each time the receiving end receives a new data block.

[0090] Set the counter to Rev_Dat, and the minimum number of received data blocks triggered by the receiving end to generate a status report is Min_Rev_Dat, and the maximum number of received data blocks triggered by the receiving end to generate a status report is Max_Rev_Dat.

[0091] Go to step 2, the receiving end judges whether it has received the polling instruction sent by the sending end, and whether the current count value of the counter Rev_Dat reaches Max_Rev_Dat, if the receiving end receives the polling instruction sent by the sending end, and the current value of the counter Rev_Dat If the count value has not reached Ma...

Embodiment 3

[0096] Embodiment 3, the specific implementation process of the sending end deleting the data stored in its cache and sending a polling instruction to the receiving end according to the timer includes the following steps:

[0097] Step 1. The sending end establishes an RLC entity, and starts a timer, and the timer starts counting.

[0098] The timer is set to Timer_Poll, the time interval for the sender to send the polling indication information is the timing duration of the timer, and the maximum number of data blocks stored in the buffer of the sender is a predetermined number.

[0099] Go to step 2, the sender judges whether the timer has expired, the number of data blocks in the sending window, that is, the number of data blocks in the sender's cache, has reached the predetermined number, if the timer times out, regardless of whether the number of data blocks in the sending window has reached the predetermined number quantity, go to step 3.

[0100] In step 3, the sending...

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Abstract

A retransmitting method of transmission layer includes transmitting data block information being received correctly to sending end by receiving end through control message in evolution mobile access network system, deleting off data block stored in its buffer storage and received correctly at receiving end by sending end according to its received control message.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a transmission layer retransmission method and system. Background technique [0002] UMTS (Universal Mobile Telecommunications Systems, Universal Mobile Telecommunications System) is a third-generation mobile telecommunications system that uses a WCDMA (Wideband Code Division Multiple Access) air interface. Usually UMTS system is also called WCDMA communication system. In order to ensure the competitiveness of 3GPP radio access technology in the next few years or longer, the 3GPP TSG RAN #26 meeting approved the research project "Evolved UTRA and UTRAN", that is, LTE (Long Term Evolution). Important goals of this long-term evolution include: reduced latency, higher user data rates, improved system capacity and coverage, and reduced costs for operators. [0003] In UMTS and LTS, both the sending end and the receiving end support AM (acknowledged mode) service, that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/08H04L29/08
CPCH04L1/1874H04L1/1678H04L1/1809H04L1/1803
Inventor 郑潇潇
Owner HUAWEI TECH CO LTD
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