Method for segmenting and optimizing perception multiple-hop relay network and mobile terminal

Abstract

The invention relates to the field of communication, in particular to a method for segmenting and optimizing a perception multiple-hop relay network and a mobile terminal. The method comprises the following steps of: detecting states of adjacent PU (Primer User) nodes so as to determine the state of a current SU (Secondary User) node, and sending state information of the current SU node to adjacent upstream and / or downstream SU nodes of the current SU node; receiving the state information of the adjacent upstream and / or downstream SU nodes of the current SU node; judging whether the current SU node is an end node or an intermediate node according to the state information of the adjacent upstream and / or downstream SU nodes received by the current SU node; if the current SU node is the end node, sending attribute information of the end node to the adjacent upstream and / or downstream SU nodes in a segment; and if the current SU node is the intermediate node, forwarding the attribute information to the adjacent upstream and / or downstream SU nodes. The embodiment of the invention has the advantage that data transmission can be performed in each segment so as to achieve the effect of spatial multiplexing.

Description

technical field [0001] The present invention relates to the communication field, in particular to a perceptual multi-hop relay network segmentation method and device. Background technique [0002] In the Cognitive Radio (CR) idea proposed in recent years, the wireless system is divided into a primary system (Primary System) and a secondary system (Secondary System). The users of the primary system (Primary User, PU node) have legal spectrum authorization, and the users of the secondary system (Secondary User, SU node) detect the idle frequency band of the primary system, which is called a spectrum hole, and use the spectrum hole for communication. Communication can be realized without increasing the requirement of new frequency spectrum, which greatly reduces the cost of the system. [0003] The multi-hop technology reduces the power required for a single transmission by flexibly selecting routes. While increasing the coverage area of ​​the system, it provides a more flexib...

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Problems solved by technology

[0004] The inventors of the present invention found that in the prior art perceptual multi-hop relay network, all mobile stations in the entire cell form a transmission link, and if a relay node is unavailable, the entire transmission link is unable to work properly

[0005] In addition, the inventors of the present invention also found that in a relay-based Orthogonal Frequency Division Multiple Access (OFDMA) system, the method of separating relay selection and node power control cannot achieve optimal performance in a perceptual multi-hop relay network. The transmission effect

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