Method for cross layer resource distribution and grouped dispatch in cognitive wireless network

Abstract

The invention provides a method for cross layer resource distribution and grouped dispatch in a cognitive wireless network, which belongs to the technical field of wireless communication. In the method, the following factors are integrally considered: the service priority level of each user in the cognitive wireless network; the line length in a buffer pool formed by sub users waiting for the frequency spectrum distribution and the grouping time-out condition; the minimum speed requirement of the users; and information of the emitting power upper limit of a cognitive wireless base station and the like. The cross layer configuration can be carried out on the parameters of media access control (MAC) layers and physical layers of user sub carrier distribution, dynamic modulation modes, multi-user grouped data service sequence, power and bit distribution and the like according to an improved cross generation elitism selection heterogeneous recombinant cataclysmic mutation resource management (CHCRM) algorithm, and the cross layer integral optimization on the cognitive wireless network is realized. The average time delay of a system is reduced, and the system packet loss is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for cross-layer resource allocation and group scheduling in a cognitive wireless network. Background technique [0002] The third generation mobile communication system (3G, The 3rd Generation) began in the middle and late 1990s. The main features of the 3G system are: providing more types of services, better forward and backward compatibility, global seamless roaming, and higher capacity. Large, high data rate, high spectrum utilization. Among them, TD-SCDMA technology is a 3G standard independently formulated by China. TD-SCDMA technology has the advantages of large system capacity, high spectrum utilization rate, and strong anti-interference ability. TD-SCDMA technology uses many key technologies to support the realization of its functions at the same time. For example: smart antenna technology, multi-user detection technology, power control technolog...

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Problems solved by technology

[0003] Although the 3G system has greatly improved compared with 2G, due to the strong demand of users for multimedia services and high-speed data communication services and the limitations of 3G technology, the 3G system still cannot meet the growing needs of users.

However, as the number of users and the number of subcarriers increase, the complexity of resource allocation in cognitive wireless networks increases exponentially, making traditional resource allocation methods unable to meet the needs of multi-user cognitive wireless networks.

Moreover, due to the characteristics of cognitive wireless networks, the power, bit error rate and computational complexity of its network equipment are limited, which are lower than those of ordinary wireless networks. In this case, the current wireless network resource allocation method cannot guarantee the cognitive wireless network The transmission quality and network performance of the network are also difficult to improve the capacity and transmission rate of the network

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