Scheduling method for ensuring time delay stability of non-real-time business data packet for OFDMA system

Abstract

A scheduling method for ensuring the delay stability of non-real-time service data packets in an OFDMA system is to improve the delay jitter performance of the proportional fair algorithm-C-MC-PFS algorithm in a multi-carrier system to complete the frequency Resource allocation; including the following five steps: (1) preparation stage for dividing resources and setting initialization parameters, (2) channel state information feedback stage, (3) RB resource allocation stage, (4) data transmission stage, (5) ) Packet delay estimation stage. The method of the invention considers the user's channel condition and the actual transmission rate of the service in the scheduling process, and maintains good proportional fairness. There are two main innovations: the introduction of a delay control mechanism and the estimation of packet delay, this method can provide a relatively smooth data rate for the transport layer, and can better maintain the effectiveness and fairness of the C-MCPFS algorithm sex.

Description

technical field [0001] The invention relates to a scheduling method for ensuring the stability of time delay of non-real-time service data packets in an OFDMA system, and belongs to the technical field of resource scheduling in wireless communication. Background technique [0002] With the continuous development of wireless communication technology, the integration of wireless network and Internet will become the mainstream trend of communication development in the future. The traditional cellular network mainly based on circuit switching services has begun to develop continuously along the network structure of all IP. In such a network structure, all services will be based on packet switching, and all data packets need to be uniformly scheduled by the system. [0003] Resource scheduling plays a key role in ensuring the performance of wireless communication systems. On the one hand, from the perspective of system throughput, taking into account the differences in geographi...

AI Technical Summary

Problems solved by technology

It can be seen from the above formula that the optimal solution problem of proportional fairness under multi-carrier conditions is a combinatorial optimization problem. Due to the combinatorial expansion characteristics of this problem, the implementation complexity is high, and it is difficult to realize in engineering

However, due to the dynamic changes of user channel conditions, it is very likely to cause instability in user resource allocation, resulting in instability in packet delay and deterioration of transport layer performance.

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