Method for controlling radio link control layer buffer area overflow

Abstract

The present invention relates to a kind of control method of wireless link control layer buffer overflow, comprising: A. preset RLC buffer threshold value, and initialize Bo value to be 0; B. RLC carries out pre-segmentation to received SDU, Calculate the current Bo value according to the result; C. Determine whether the Bo of RLC is less than the RLC buffer threshold value, if so, perform RLC function processing, and then perform MAC function processing; otherwise, delete the SDU, update the current Bo value, and perform MAC function processing . The present invention also relates to another control method. The difference between this method and the above-mentioned method is: the received SDU does not need to be pre-segmented, and directly performs RLC function processing; in addition, it searches for the first PDU that has not sent the marked SDU, and deletes the SDU. For all the PDUs of the SDU, the rest of the steps are the same as above. The invention controls the SDU of the RLC buffer, effectively reduces the end-to-end time delay, improves the response speed and the quality service between the ends.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method for controlling buffer overflow of a wireless link control layer Background technique [0002] With the development of communication technology, especially the development of 3G technology, data service will become one of the important services of mobile communication system. This wireless data service will provide end users with a seamless connection to Internct, enabling users to obtain more convenient information through the wireless system. However, the existing Internet network mainly implements networking and completes data transmission through TCP / IP. [0003] The transmission control protocol (TCP, Transmit Control Protocol) is a reliable transmission technology, which ensures the transmission performance of the transmission control protocol TCP in the existing wired network by adopting methods such as slow start, congestion avoidance and fast recovery. Th...

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Problems solved by technology

[0013] Therefore, as can be seen from the above-mentioned disclosed methods, the disadvantages are: due to the TCP slow start effect, multiple TCP packets will arrive at the buffer of the RLC layer at the same time, so the timers of these SDUs will start at the same time

Due to the in-order transmission mechanism of the wireless network, once one SDU times out, the discarding timer of all subsequent SDUs in this batch will time out. At this time, the SDUs are collectively discarded, which will cause no data to be sent by the RLC layer and reduce the RLC rate. Throughput, which affects the quality of service between end-to-end

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