Improved weight LTE system MAC layer resource block distribution method

Abstract

The invention belongs to the technical field of LTE downlink scheduling. The LTE system MAC layer resource block allocation method based on the improved weight comprises the steps of calculating the signal to interference plus noise ratio of a user i in each subcarrier, the effective signal to noise ratio of the user i in each RB and the transmission rate which can be reached by the user i in each RB at the tth TTI; issuing the data packet to a buffer area of a link control layer, and updating the queue length of a user buffer area; allocating the RBs in turn, and calculating the user priority of the user i on the jth RB by using a priority formula; after distribution of the jth RB is finished, updating the data volume in the user buffer area according to a formula until all the RBs are distributed completely or the buffer areas of all the users are empty; and enabling the controller of the MAC layer to allocate resource blocks according to a priority rule, and enabling a user to use the allocated resource blocks to transmit data. According to the invention, on the premise of ensuring that the user throughput is not reduced, the system user perception rate is obviously improved.

Description

Technical field [0001] The present invention belongs to the technical field of LTE (Long Term Evolution) downlink scheduling, and in particular relates to a method for allocating medium access control (MAC) layer resource blocks of an LTE system with improved weights. Background technique [0002] LTE has been widely used as a revolutionary mobile communication technology, and the fifth-generation mobile communication technology based on LTE is about to be put into commercial use. Under the bursty service model, data packets are delivered to the buffer area of ​​the link control layer, and user data packets are not allocated to the wireless channel for transmission in the buffer area in time, thus accumulating and 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 the LTE system. System User Perceived Rate (SUPT) is introduced by 3GPP as a new indicator to me...

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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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