Downlink resource allocation algorithm based on channel fluctuation perception under LTE system

Abstract

The invention discloses a downlink resource allocation algorithm based on channel fluctuation perception under an LTE system. The algorithm is characterized by, to begin with, summarizing channel fluctuations of each user in a current RB to be allocated, and with current channel quality status of the user being combined, calculating a channel fluctuation influence factor phi; multiplying a dispatching index obtained based on a classical resource allocation algorithm by the channel fluctuation influence factor to obtain a dispatching index of the resource allocation algorithm based on channel fluctuation perception; allocating the RB to the user, the dispatching index of which is largest, and if residual transmission data of the user is not greater than transmission capacity of the RB, deleting the user from a dispatching queue after finishing RB allocation; and carrying out RB allocation one by one, and if the current time slot has no data to be transmitted, allocating the residual RB according to MAX C / I. The downlink resource allocation algorithm is based on the classical resource allocation algorithm and takes the user channel quality fluctuations into consideration, and thus system throughput and user video experience in the LTE system can be improved effectively.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a downlink resource allocation algorithm for channel fluctuation perception in an LTE system. Background technique [0002] With the continuous improvement of wireless access rate, the types of mobile communication services gradually evolve from pure voice and common data services to rich multimedia services, mainly video services. The more complex business structure requires great changes in network performance, requiring the underlying network to provide higher communication rates and smaller transmission delays. Therefore, under the premise of limited resources, effective resource allocation among multiple users to increase system throughput and improve user video experience has become a research hotspot. [0003] At present, the more classic wireless resource allocation methods include: RR (Round Robin, polling) algorithm, MAX C / I (Maximum Carrier to Interferenc...

AI Technical Summary

Problems solved by technology

[0004] However, the current scheduler is still flawed

Existing scheduling algorithms only consider the user's instantaneous channel quality when performing resource allocation, and do not consider the user's channel fluctuation; as a result, some users have not been scheduled due to poor channel conditions during resource allocation, and these users are missed. Possibility of scheduling a time slot with a better channel condition than its own

Images