BO (Buffer Occupy) counting sending based method capable of avoiding waste of LTE (Long Term Evolution) air-interface resource in ARQ (Automatic Repeat Request) retransmission
An air interface resource and retransmission technology, which is applied in network traffic/resource management, error prevention/detection using return channels, electrical components, etc. The effect of improving efficiency
Active Publication Date: 2014-03-19
WUHAN POST & TELECOMM RES INST CO LTD
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However, at this time, the transmission opportunities scheduled by the MAC layer cannot be taken back and redistributed, and the wireless resources of the air interface corresponding to the transmission opportunities will be wasted.
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[0025] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0026] Please refer to figure 1 , a method for avoiding waste of LTE air interface resources during ARQ retransmission based on sending BO counts, the specific steps of its embodiment are as follows:
[0027] 1) When the RLC (Radio Link Control) entity is established, obtain the configuration of the maximum number of retransmissions from the RRC (Radio Resource Control) layer;
[0028] 2), after the RLC entity sends the newly transmitted data, the data packet is cached for possible retransmission operations;
[0029] 3), after the automatic retransmission condition of the RLC entity is triggered, the number of times the data packet is sent to BO is counter-managed;
[0030] 4) The MAC (Medium Access Control) layer performs scheduling according to the delivered BO value and a specific scheduling algorithm, and indicates the sched...
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The invention relates to a BO (Buffer Occupy) counting sending based method capable of avoiding waste of LTE (Long Term Evolution) air-interface resource in ARQ (Automatic Repeat Request) retransmission in the field of mobile communication, which is characterized by comprising the following steps that: 1) when an RLC (Radio Link Control) entity is established, the configuration of maximum retransmission number is obtained from an RRC (Radio Resource Control) layer; 2), after the RLC entity sends newly sent data, a data packet is cached for possible retransmission operation; 3), after the condition of automatic retransmission of the RLC entity is triggered, the counter management of the number of sent BO by the data packet is carried out; 4), an MAC (Medium Access Control) layer is scheduled according to the size of the sent BO value, and scheduling results are shown to the RLC entity; and 5), the RLC entity gives a priority for transmitting a retransmission data packet according to the scheduling results of the MAC layer, the counter management of the retransmission number of the retransmission data packet is carried out, and a newly-transmitted data packet is sent to the MAC layer after the retransmission data is transmitted under the condition that the transmission opportunities are unused and data is newly transmitted. By the method, the waste of LTE air-interface resource in ARQ retransmission is effectively avoided, thus the transmission efficiency of air interface is improved to a certain extent.
Description
technical field [0001] The present invention relates to a method for avoiding waste of LTE (Long Term Evolution, long-term evolution system) air interface resources during ARQ (Automatic Repeat reQuest, automatic retransmission) retransmission based on issued BO (Buffer Occupy) counting in the field of mobile communication. Background technique [0002] In the protocol stack of the 3GPP LTE access network system, the RLC (Radio Link Control) layer is responsible for radio link control. Among them, data transmission can be divided into transparent mode (TM, Transparent Mode), unacknowledged mode (UM, Unacknowledged Mode) and acknowledged mode (AM, Acknowledged Mode) according to different transmission attributes. The AM mode supports ARQ, that is, it supports retransmission of data that has not been confirmed by the receiver to improve the reliability of data transmission. [0003] The configuration of the RLC entity (including configuration items such as the maximum number ...
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IPC IPC(8): H04L1/18H04W28/14H04W72/12
Inventor 李凯颜志凌姜琳峰管鲍
Owner WUHAN POST & TELECOMM RES INST CO LTD