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

Abstract

Improving jitter performance of time delay of C-MCPFS proportion fairness algorithm in multicarrier system, the disclosed method accomplishes allocation of frequency resources. The method includes following five operation steps: (1) preparative step for partitioning resources, and setting up initialization parameters; (2) step for feeding back information of channel state; (3) step for allocating RB resources; (4) data transmission step; (5) step for estimating time delay of data packet. Considering channel state of user and practical transfer rate of traffic in scheduling process, the method keeps good proportion fairness performance. Two points of innovation are: introducing time delay control mechanism, and estimating time delay of data packet. The method provides smooth data rate for transmission layer, and keeps efficiency and fairness of C-MCPFS algorithm.

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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