Relay selection and power distribution method of energy acquisition node network

A technology of energy collection and node network, which is applied in the direction of power management, energy consumption reduction, advanced technology, etc., and can solve problems such as high scheduling time requirements, excessive growth of the number of users participating in scheduling, and scheduling speed that cannot catch up with the channel, etc.

Inactive Publication Date: 2015-11-04
GUANGZHOU UNIVERSITY
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  • Application Information

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Problems solved by technology

Based on the existing online power allocation algorithm, it faces the problem that the complexity increases too fast with the number of users participat...

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  • Relay selection and power distribution method of energy acquisition node network
  • Relay selection and power distribution method of energy acquisition node network
  • Relay selection and power distribution method of energy acquisition node network

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Embodiment Construction

[0056] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0057] refer to figure 1 , figure 1 Shown is the secondary user signal transmission model diagram. Sub-user SU 1 Both relays and relays are energy collection nodes, which can absorb and store energy from the external environment. The signal transmission is divided into two phases: the first phase is the secondary user SU 1 transmission signal 1 To the relay, the transmitting power is p 1,i , at the same time the primary user transmits the signal s 0 To the master user receiver, set E{|s 0 | 2}=E{|s 1 | 2}=1, where E{·} represents the expectation operator, |·| represents the complex number s 0 ,s 1 the absolute value of . The second stage is to relay the send from the SU 1 Received signal s 1 , the transmitting power is p r,i .

[0058] refer to figure 2 , figure 2 Shown as Sub User SU 1 , SU 2 Both relays and relays are single-antenna systems. ...

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Abstract

The invention discloses a relay selection and power distribution method of an energy acquisition node network. According to limiting conditions of energy acquisition, an object function enables a maximum system communication rate is constructed; in addition, the relay selection and power distribution method based on the energy acquisition node network is provided for solving the object function. Compared with a conventional sensing radio relay system network, relay nodes based on energy acquisition are different from conventional communication nodes which immediately stop communication once batteries run out and are capable of collecting energy from environment, so that green communication is realized, and the service lifetime of the communication nodes is prolonged. The relay highest in communication rate is selected for forwarding information from a secondary user, so that the handling capacity of the system is improved, the communication range of the network is enlarged, and the method is suitable for cognitive wireless communication system which is high in endurance time and transmission distance requirements.

Description

technical field [0001] The invention relates to a relay selection and power distribution method of an energy collection node network based on a cognitive radio technology, and belongs to the technical field of wireless communication. Background technique [0002] Cognitive radio (CR) is an intelligent wireless communication technology that improves spectrum utilization. It allows secondary users to use the spectrum resources legally allocated to primary users while ensuring the communication quality of primary users. Secondary users can also rely on spectrum sensing Identify vacant spectrum not used by primary users. Cognitive radio has the ability to learn, and can exchange information with the surrounding environment to perceive and utilize the available spectrum in the space, and limit and reduce the occurrence of conflicts. [0003] Cognitive radio cooperative spectrum sensing technology based on relay forwarding realizes the cooperation between one cognitive user and m...

Claims

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Application Information

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IPC IPC(8): H04W40/22H04W52/34
CPCH04W40/22H04W52/346Y02D30/70
Inventor 唐冬江丹丹黄高飞刘贵云刘外喜吕明霞
Owner GUANGZHOU UNIVERSITY
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