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Distributed cross-layer optimization method for mimo wireless multi-hop network based on channel mode selection

A wireless multi-hop network and cross-layer optimization technology, applied in the field of distributed cross-layer optimization of MIMO wireless multi-hop networks

Active Publication Date: 2019-09-24
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Nowadays, this influence is not only manifested in each independent layer, but also poses a great challenge to the design of the entire network architecture

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  • Distributed cross-layer optimization method for mimo wireless multi-hop network based on channel mode selection
  • Distributed cross-layer optimization method for mimo wireless multi-hop network based on channel mode selection
  • Distributed cross-layer optimization method for mimo wireless multi-hop network based on channel mode selection

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Embodiment Construction

[0037] In order to make the above and other objects, features and advantages of the present invention more apparent, further detailed description will be given below.

[0038] The present invention considers a general wireless multi-hop network running at time nodes with a directed graph To describe the topological model of the network, where Represents the set of nodes in the network, Represents the collection of all source nodes that can collect information sources, Represents the collection of all information sources that need to be routed in the network, Represent the set of all directional links, n and b in each link l=(n, b) respectively refer to the starting node and the destination node of the link, then represents the set of interfering links. Indicates the set of outgoing links of node n Indicates the set of inbound links of node n Indicates the set of channel modes on each link, and these channel mode sets are composed of different antenna combina...

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Abstract

The present invention discloses an MIMO wireless multi-hop network distributed cross-layer optimization method based on channel mode selection. The method comprises the following steps: obtaining a current network state in real time in a MIMO; deciding the rate of each distributed source node through source nodes according to the relation of the current node queue backlogging and the penalty function; and determining the route and scheduling decision according to the backpressure difference of each node and the outgoing link nodes. The channel mode selection problem of the MIMO network is involved so as to influence the network effect, coupled bound terms are separated through adoption of a dual decomposition method so as to realize distributed enforcement, and the optimal solution of a primal problem is recovered through an iteration method; and after multi-time iterations of the whole process are performed, the effect of the source rate of the wireless network is the maximum. The MIMO wireless multi-hop network distributed cross-layer optimization method based on channel mode selection is able to dynamically regulate the selection of channel modes according to the current network state to realize the optimal allocation of the source rate acquisition effect in a multi-hop network, ensure the stable backlogging of the whole network queue and realize the decision distribution.

Description

technical field [0001] The invention relates to the technical field of wireless network communication transmission, in particular to a channel mode selection-based MIMO (Multiple Input Multiple Output) wireless multi-hop network distributed cross-layer optimization method. Background technique [0002] MIMO wireless technology is a technology that uses multiple transmitting antennas and multiple receiving antennas for wireless transmission. It is the focus of research in today's communication field. The system capacity becomes possible, which can effectively save spectrum resources and improve energy utilization. At present, the research on optimization algorithms of MIMO wireless technology mainly focuses on how to fully obtain diversity gain and multiplexing gain. Antenna diversity can resist channel fading and improve the reliability of wireless links, and the joint application of multi-dimensional antenna diversity and time diversity can obtain better diversity effects,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0417H04B7/0413
Inventor 徐伟强陈晛史清江王成群吕文涛
Owner ZHEJIANG SCI-TECH UNIV
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