Method for selecting cooperative nodes in cognitive radio network based on energy and forwarding rate
A cognitive radio and cooperative node technology, applied in the field of cooperative node selection, can solve problems such as increased energy consumption, increased probability of crash, and increased data volume of authorized nodes, so as to reduce workload, improve performance, and reduce effect of complexity
Inactive Publication Date: 2013-03-27
BEIHANG UNIV
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Problems solved by technology
However, when the authorized node has a large amount of data to send, in order to obtain channel access opportunities, the amount of data from the authorized node that the unauthorized node needs to assist in the transmission also increases
The energy of unauthorized nodes is limited. When the amount of data that needs to be transmitted cooperatively increases, its energy consumption also increases, resulting in an increased probability of crash
Method used
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[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0018] see figure 1 As shown, a kind of cooperative node selection method based on energy and forwarding rate adopted by the present invention is divided into two stages:
[0019] The first stage is the stage of collecting cooperation requests
[0020] During this phase, non-authorized nodes ST i (i represents the identity of an unlicensed node) Periodically check the authorized spectrum, if the spectrum is free, then transmit its own data; otherwise, send the cooperative transmission request information CN to the authorized sending node PT i (ST i -PT), the CN i (ST i -PT) includes the location information AD of this node i (ST i ) and the current remaining energy PP of this node i (ST i ), the collaborative transmission request information CN i (ST i -PT) is expressed as a set of CN i (ST i -PT)={AD i (ST i ),PP i (ST i )}.
[0021] The auth...
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The invention discloses a method for selecting cooperative nodes in a cognitive radio network based on energy and forwarding rate. The method comprises a process of collecting the cooperative request information of unauthorized nodes by authorized nodes, and a process of selecting the cooperative nodes by the authorized nodes, wherein in the process of collecting the cooperative request information of unauthorized nodes by authorized nodes, the authorized nodes screen the cooperative request information according to the residual energies of nodes sending the cooperative request information, thereby being in favor of reducing the rate of DH (dead halt) caused by that the energies of the unauthorized nodes are used up in the process of cooperative transmission; and in the process of selecting the cooperative nodes by the authorized nodes, the authorized nodes screen appropriate unauthorized nodes as the cooperative nodes one by one according to the sizes of cooperative factors of the unauthorized nodes under the interference which can be born by the authorized nodes. The method of the invention can provide an approach how to select cooperative nodes from unauthorized nodes for the authorized nodes in the cognitive radio network. The method can be applied to any cognitive radio network with the cooperative transmission of authorized nodes and unauthorized nodes.
Description
technical field [0001] The present invention relates to a method for selecting a cooperative node in a cognitive radio network, in particular to a method for selecting a cooperative node in a cognitive radio network based on energy and forwarding rate. Background technique [0002] Cognitive radio, also known as cognitive radio, is a new wireless communication technology emerging in recent years. It can automatically change its own sending and receiving parameters through interactive perception of the wireless communication environment in which it works, thereby dynamically reusing the available spectrum. Because it can improve the potential utilization of spectrum resources and dynamically allocate spectrum resources, cognitive radio technology is considered to be the main means to efficiently use wireless spectrum in the future and alleviate the increasing scarcity of spectrum resources. [0003] Cognitive radio network is produced by combining cognitive radio technology ...
Claims
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IPC IPC(8): H04W16/14H04W28/16
Inventor 王锐卢金燕张焜刘轶钱德沛
Owner BEIHANG UNIV