A node selection method and device
A node selection and node technology, applied in wireless communication, electrical components, etc., can solve the problems that information cannot be accumulated and accuracy is reduced
Active Publication Date: 2020-12-25
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology
[0003] One way is to choose when the transmission rate of all relay nodes in the relay cooperation system is not variable, but the fixed transmission rate will cause the information in the transmission process to be unable to be accumulated, and CRS requires that the information can be collected when using RC technology. Therefore, this method cannot be applied to CRS based on RC technology (that is, CRS using RC technology); another method is: combined with the information accumulation selection at the relay node and the destination node with rateless coding technology, but based on SWIPT technology The information transmission of CRS (that is, CRS using SWIPT technology) is affected by many factors, and only combining the information accumulation at the relay node and the destination node to select the forwarding node will reduce the accuracy
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[0052] Firstly, the relay cooperation system of this embodiment is described. A schematic structural diagram of the relay cooperation system is as follows figure 1 As shown, it includes: a source node (represented by S), a destination node (represented by D) and M relay nodes, and the set of relay nodes can be used R={R i |i=1,2,...,M} means, R i It is the i-th relay node in the relay cooperation system. There are two stages of data transmission in the relay cooperation system, which are recorded as the information broadcast (Broadcast, BS) stage and the information forwarding (InformationForward, IF) stage, where the BS stage It is the stage sent from the source node to the relay node and the destination node. The IF stage is the stage sent from the relay node to the destination node. In the BS stage, the source node sends data with the first transmission power, and in the IF stage, the relay node sends data with the second transmission power. Transmission power to send data...
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The invention provides a node selection method and device. The method comprises the steps of during a forwarding node selection process, firstly obtaining the first information amount and the second information amount accumulated by a target node, and and obtaining the third information amount and the first energy accumulated by the relay nodes; based on the first information amount, the second information amount, the third information amount, the first energy and the constraint condition, optimizing and adjusting the relay nodes included in the candidate node set for multiple times; and selecting the forwarding node based on the throughput corresponding to the candidate node set after each adjustment, so that the forwarding node can be selected by combining the information accumulation, energy accumulation and throughput during the transmission process of the detection packet, and the method is suitable for the CRS based on the RC technology. And moreover, the influences of the information accumulation, the energy accumulation and the throughput are comprehensively considered, so that a relay cooperation system can perform the optimal distribution on the information accumulation and the energy accumulation, and the throughput is maximized through the optimal distribution of the information accumulation and the energy accumulation.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a node selection method and device. Background technique [0002] In order to increase the coverage of information transfer between networks and enhance network robustness, the source node and destination node in the Cooperative Relaying System (CRS) can transmit information by means of one or more relay nodes (transmission information The relay node in the CRS is referred to as a forwarding node for short), and the relay node in the CRS can use Simultaneous Wireless Information and Power Transfer (SWIPT) technology or Rateless Code (RC) technology in the process of transmitting information. However, there are many relay nodes in a CRS, so before the source node and the destination node transmit information, it is necessary to select a forwarding node from many relay nodes. Currently, there are two ways to select forwarding nodes: [0003] One way is ...
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IPC IPC(8): H04W40/04H04W40/10H04W40/22
CPCH04W40/04H04W40/10H04W40/22
Inventor 张信明周方陶磊
Owner UNIV OF SCI & TECH OF CHINA