System and method for allocating cross-layer resources in cognitive radio network

Abstract

The invention relates to the technical field of wireless communication and provides a system and method for allocating cross-layer resources in a cognitive radio network. The technical scheme adopted by the invention is characterized in that frequency spectrum detection results and channel detection results, which are reported by each user terminal, are collected and a comprehensive decision is made on subchannel allocation, modulation coding scheme determination, data packet dispatching, power distribution and the like according to an improved minimum cost-maximum flow algorithm and a LaGrange optimization-based search algorithm while the service quantity and QoS (quality of service) parameters of each user are combined. By applying the system and method provided by the invention, the QoS requirements of multiple users on different services can be met, the effective throughput of the system can be maintained to be high, and a resource allocation mechanism with an effective QoS guarantee is provided for the cognitive radio network.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to the allocation of cross-layer resources in a cognitive wireless network. Background technique [0002] With the continuous emergence of various new wireless communication technologies, the rise of various wireless services, and the emergence of a large number of new-generation broadband wireless networks (such as LTE-A and WiMAX), the problem of spectrum resource shortage is becoming increasingly serious. At present, the radio spectrum is assigned to different networks in a fixed way (that is, authorized spectrum), which is planned and managed by the country. A large number of measurement results in practical applications show that this method of fixed spectrum authorization allocation and use leads to a large amount of traffic carried by certain spectrums and serious congestion; at the same time, the spectrum utilization efficiency of some spectrums is extremely l...

AI Technical Summary

Problems solved by technology

Some only start from the perspective of simply improving system throughput, without or less consideration of the impact of user QoS requirements, and thus cannot fully guarantee the system's satisfaction with cognitive user QoS; some, although user QoS parameters are taken into consideration, do not Does not consider the difference in QoS requirements of different business types in actual situations; although some are well considered, completing the entire resource allocation process requires a large number of long-term complex calculations, which is not suitable for use in actual systems

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