Method for managing combined wireless resource of self-adaption MIMO-OFDM system based on across layer

Abstract

The invention relates to a joint radio resource management method based on a cross-layer and used to a self-adapting MIMO-OFDM system, comprising: when a plurality of users initiate access requirement, a classifier processes to classify according to service types of the access requirement, and CAC module decides if the access requirement is allowed to accept according to different QoS requirements of a heterogeneous service and resource conditions; a priority scheduling mechanism faces the users, and a scheduler processes to schedule for the heterogeneous service types, different QoS requirements, and user preference information according to priority rules, and transmits information to a physical layer module, so as to determine the users of each time slot which is provided with resource allocation options; the physical layer adopts a resource allocation algorithm to allocate sub-carriers, loading bit streams and allocate corresponding transmission power according to data link layer information, and designs a net utility function for each classification on the base of the game theory, and transforms a target of pursuing net utility function into solving a non-cooperation game process. Compared with traditional methods, the method shows better performance advantages on outage probability, degree of satisfaction of the users for the service and system throughput.

Description

technical field [0001] The present invention relates to the fields of cross-layer design and wireless resource management of communication systems, in particular to a joint wireless resource management method for self-adaptive MIMO-OFDM system based on cross-layer. [0002] According to the requirements of the next generation network for heterogeneous services and high-speed data transmission, and for the problems and challenges in the existing wireless resource management, the present invention takes cross-layer design as the guiding ideology, from the perspective of admission control, scheduling, and joint resource allocation Establish a system architecture and design a comprehensive radio resource management strategy. Based on game theory, by designing net utility functions for heterogeneous businesses, the goal of maximizing net utility functions is equivalent to a series of Nash equilibrium points in non-cooperative game processes. Throughput is optimized for performance...

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Problems solved by technology

However, in the existing design, the channel state information from the physical layer and the differences in the QoS requirements of different services in the application layer have not been considered jointly, and the scheduling results from the scheduler have not been able to further indicate the resource allocation of the physical layer; on the other hand, Although the principle of water injection realizes the optimal distribution of power in theory, in order to reach the theoretical limit, the modulation order needs to be continuously variable, and the power distribution must be continuous rather than quantized, which limits its practical application. Therefore, it is necessary to design A mechanism for limited granularity bit loading to meet the practical application requirements of adaptive modulation systems

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