Multicast Transmission Joint Access Control and Precoding Calculation Method in Cognitive Wireless Networks
A cognitive wireless network and multicast transmission technology, which is applied in the field of multicast transmission joint access control and precoding calculation, can solve the problem of poor performance of the precoding matrix calculation method, does not consider the problem of service access, and the algorithm cannot be applied to multiple descriptions Encoding multicast network and other issues
Active Publication Date: 2017-09-05
BEIJING UNIV OF POSTS & TELECOMM
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[0010] (1), only applicable to non-cognitive wireless networks, without modeling primary user interference, the proposed algorithm cannot be applied to cognitive wireless networks
[0011] (2) It is only applicable to traditional multicast networks, and the proposed algorithm cannot be applied to multi-description coding multicast networks
[0012] (3), only considering the precoding matrix calculation of a given multicast service, not considering the service access problem
[0013] (4) The performance of the proposed precoding matrix calculation method is poor and needs to be further improved
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[0075] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0076] For the sake of brevity and intuition in description, the solution of the present invention is described below by describing several representative implementation manners. Numerous details in the embodiments are only used to help the understanding of the solutions of the present invention. But obviously, the technical solutions of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the solution of the present invention, some embodiments are not described in detail, but only a framework is given. Hereinafter, "including" means "including but not limited to", and "according to..." means "at least according to, but not limited to only based on...". Due to the language habits of Chinese, when t...
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The invention proposes a multicast transmission joint access control and precoding calculation method in a cognitive wireless network. Including: collecting the resource information of the cognitive base station and the user information expecting to receive the multicast service, so as to establish the problem model of multi-antenna multi-description coding multicast service access control and precoding matrix in the cognitive scenario; in the fixed problem model The precoding matrix to calculate the set of target transmission users in each multicast group; the problem model is corrected to obtain the correction model, the target transmission rate in the correction model is fixed, and the semi-positive definite relaxation and power factor-based scaling are used The precoding matrix randomization algorithm solves the correction model to calculate the precoding matrix; uses the calculated precoding matrix to iteratively solve the correction model to obtain the iterative precoding matrix and the iterative target transmission rate. The present invention maximizes the available benefits of the cognitive wireless network, and also completes the mathematical modeling and algorithm design of the problem.
Description
technical field [0001] The invention belongs to the technical field of wireless communication data transmission, in particular to a multicast transmission joint access control and precoding calculation method in a cognitive wireless network. Background technique [0002] With the popularization of multimedia services, multicast transmission has become an indispensable part of wireless communication networks. How to design a resource-efficient multicast transmission scheme has attracted great attention from academia and industry. [0003] With the popularization of multimedia services, the multicast transmission technology has also attracted the attention of the industry. Because it can serve multiple users simultaneously in one transmission, multicast technology can effectively improve the utilization efficiency of network resources. However, in multicast transmission, the geographical distribution of receiving users is discrete, and their receiving channel conditions and h...
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IPC IPC(8): H04W4/06H04L25/03
Inventor许文俊欧蓉李胜钰周锐
OwnerBEIJING UNIV OF POSTS & TELECOMM