An Allocation Method of MAC Layer Resource Blocks in LTE System with Improved Weight

Abstract

The invention belongs to the technical field of LTE downlink scheduling, discloses a method for allocating resource blocks of the MAC layer of the LTE system based on improved weights, and calculates the signal-to-interference-noise ratio of user i in each subcarrier and the effective signal-to-noise ratio of user i in each RB ratio, the transmission rate that user i can achieve in each RB at the tth TTI; the data packet is sent to the buffer of the link control layer, and the queue length of the user buffer is updated; the RB is allocated in turn, and the utilization priority The level formula calculates the user priority of user i on the jth RB; after the jth RB is allocated, the amount of data in the user buffer is updated according to the formula; until all RBs are allocated or all user buffers are empty; The controller at the MAC layer allocates resource blocks according to priority rules, and users use the allocated resource blocks to transmit data. Under the premise of ensuring that the user throughput does not decrease, the present invention significantly improves the system user perception rate.

Description

technical field [0001] The invention belongs to the technical field of LTE (Long Term Evolution, long term evolution) downlink scheduling, and in particular relates to a method for allocating medium access control (MAC) layer resource blocks in an LTE system with improved weights. Background technique [0002] As a revolutionary mobile communication technology, LTE has been widely used, and the fifth-generation mobile communication technology based on LTE is about to be put into commercial use. Under the bursty service model, the data packets are sent to the buffer area of ​​the link control layer, and the user data packets are not allocated to the wireless channel in time for transmission in the buffer area, thus forming a queue. In wireless communication, users share limited bandwidth, so a multi-queue multi-server system can be used to simulate the allocation of resource blocks in an LTE system. System User Perceived Rate (SUPT) is introduced by 3GPP as a new indicator t...

AI Technical Summary

Problems solved by technology

[0005] (1) Existing technology - using coordinated multi-point technology to propose a centralized scheduling algorithm to improve user perception rate, but due to the need for information interaction between base stations, additional signaling overhead is introduced

[0006] (2) Prior art 2. Traditional scheduling methods (such as PF, RR, MAX C / I), do not take into account the length of user queues, resulting in the possibility of assigning limited resources to empty queues and resulting in waste of bandwidth resources

The MW scheduling algorithm can guarantee the stability of the system, but the system user perception rate obtained by the MW scheduling algorithm is not as good as the SF scheduling algorithm

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