Allocation request method of the connectable upstream bandwidth based on ARQ

Abstract

The invention relates to an uplink bandwidth distribution request method based on an ARQ enabling connection, comprising that a first bandwidth request total quantity and the size of ARQ block of the ARQ enabling connection is obtained; in every dispatching, direct distribution is achieved when the residual bandwidth meets the current bandwidth request total quantity, or the distribution of maximum integral multiple is achieved according to the size of the ARQ block when the residual bandwidth does not meet the current bandwidth request total quantity but meets the size of the ARQ block, or the bandwidth is not distributed when the residual bandwidth does not meet the current bandwidth request total quantity and does not meet the size of the ARQ block; wherein, the current bandwidth request total quantity is equal to the historic dispatch all distributed bandwidth reduced by the first bandwidth request total quantity. By adopting the minimum distribution restriction, the method eliminates the unmatched uplink bandwidth distribution, improves the realization of protocol, improves the utilization rate of the uplink bandwidth, effectively reduces retransmission of the ARQ, and improves the performance of the system.

Description

technical field [0001] The invention relates to wireless communication, in particular to an uplink bandwidth allocation request method based on automatic retransmission ARQ enabled connection. Background technique [0002] The automatic retransmission ARQ mechanism is an automatic retransmission mechanism at the MAC (medium access control) layer introduced by the Institute of Electrical and Electronics Engineers IEEE 802.16 protocol, which effectively improves the transmission performance of the MAC layer and the media plane of the MAC layer. Robustness of transmission. A MAC service data unit SDU (service data unit) is logically divided into multiple ARQ blocks (ARQBlock), and the length of the ARQ Block is determined by the ARQ_BLOCK_SIZE parameter. When the length of the SDU is not an integer multiple of the ARQ_BLOCK_SIZE specified by the connection, the last block of the SDU is composed of the remaining part at the end, and the length of each previous block is equal to...

AI Technical Summary

Problems solved by technology

However, the uplink bandwidth request and allocation mechanism of the 802.16 protocol does not consider this requirement. It is possible that the bandwidth allocated by the BS cannot meet the requirements of the MS (for example, the MS requires at least one uplink bandwidth of ARQ_Block_Size to send data, and the allocated bandwidth is smaller than this value ), the MS cannot send data in the uplink. Although the BS has allocated the uplink bandwidth for the MS on the display, the MS cannot use the bandwidth to send data, which is a waste of the uplink bandwidth. If the BS can allocate the uplink bandwidth according to any size , theoretically, ARQ connections will waste 50% of the uplink bandwidth on average

More importantly, the MS adopts the method of incrementally requesting bandwidth. After the BS allocates bandwidth for the MS, this amount is subtracted from the bandwidth requirement of the connection, but the MS cannot use this bandwidth, resulting in the bandwidth request of the BS for the connection. The data volume does not match the data volume to be sent on the MS connection. Although it can be adjusted by periodically applying for the total bandwidth, it will still cause frequent ARQ retransmissions in the long run and degrade system performance.

In this case, ARQ cannot achieve the purpose of improving the transmission performance of the MAC layer, and it will also cause low utilization of the uplink bandwidth.

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