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Resource distribution method in bidirectional cognitive relay network based on energy cooperation

A resource allocation and energy technology, applied in the direction of reducing energy consumption, advanced technology, electrical components, etc., can solve the problems of reduced received power and inability to realize commercialization

Active Publication Date: 2017-08-11
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The diameter of the coil used in this experiment reaches 50cm, which cannot be commercialized yet. If the size of the coil is to be reduced, the received power will naturally decrease

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  • Resource distribution method in bidirectional cognitive relay network based on energy cooperation
  • Resource distribution method in bidirectional cognitive relay network based on energy cooperation
  • Resource distribution method in bidirectional cognitive relay network based on energy cooperation

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with embodiment and accompanying drawing:

[0041] 1. Two-way Cognitive Wireless Relay Network Model

[0042] In the present invention, a cognitive wireless network is considered to include a primary user node PU and two secondary user nodes SU 1 and SU 2 , and a relay node Relay, the two secondary users and the relay node both use energy harvesting to provide energy, such as figure 1 shown. The system takes time slot as the minimum transmission unit, and one transmission contains N time slots in total, and the duration of each time slot is unitized as 1. It is assumed that the energy collected by the node arrives instantaneously before the start of each time slot, and the size of all collected energy has been accurately predicted before the start of data transmission. At the same time, assuming that each channel is a Rayleigh fading channel during the data transmission process, the channel fading...

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Abstract

The invention discloses a resource distribution method in a bidirectional cognitive relay network based on energy cooperation. According to the method, a system throughput optimization model is constructed in a condition that causality limitation of the acquisition energy of two users and a relay node and the interference limitation on a main user are satisfied; then, due to problem equivalence transformation, the various node power and cooperation energy joint optimization problem is decoupled into a power distribution problem and a one-by-one time-slot cooperation energy solving problem, which are separated; therefore, the solving complexity of the original problem can be greatly reduced; the decoupled power distribution problem is solved by adoption of an iterative water-filling method; the one-by-one time-slot cooperation energy solving problem is solved in a differential manner; and the result of the original problem is obtained by iteration of the two problems. By means of the resource distribution method disclosed by the invention, multiple technologies, such as cognitive radio, energy cooperation and energy acquisition, can be considered at the same time; and thus, the energy efficiency and the spectrum resource utilization rate can be effectively increased.

Description

technical field [0001] The invention discloses a resource allocation method based on system throughput maximization in a two-way cognitive wireless relay network, belonging to the technical field of wireless communication. Background technique [0002] By introducing relay nodes at the sending end and receiving end, the relay technology strengthens the coverage capability and QOS guarantee capability of the wireless communication system, and effectively reduces the system construction cost. As one of the key technologies of the future mobile communication system, the advanced relay technology has been In-depth research and heated discussions among major research institutions, equipment manufacturers and operators. From the function of the relay node, the relay communication can be divided into two categories, that is, the amplification and forwarding AF (Amplify-and-Forward) relay and the decoding and forwarding DF (Decode-and-Forward) relay; The relay node only simply ampl...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04W72/0453H04W72/0473H04W72/53Y02D30/70
Inventor 朱琦谢振威朱洪波杨龙祥
Owner NANJING UNIV OF POSTS & TELECOMM
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