Energy-carried cooperative CR-NOMA cooperative mode and relay selection algorithm

A CR-NOMA, collaborative mode technology, applied in the field of communication, which can solve problems such as poor performance

Inactive Publication Date: 2017-08-29
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide an energy-carrying cooperative CR-NOMA cooperation mode and a relay selection algorithm, and is committed to

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  • Energy-carried cooperative CR-NOMA cooperative mode and relay selection algorithm
  • Energy-carried cooperative CR-NOMA cooperative mode and relay selection algorithm
  • Energy-carried cooperative CR-NOMA cooperative mode and relay selection algorithm

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Embodiment Construction

[0061] Such as figure 1 As shown, a NOMA cooperation mode and relay selection algorithm of a cooperative cognitive network with energy, is characterized in that,

[0062] Includes data transfer and data decoding, where:

[0063] S11, the first stage of data transmission: the base station BS broadcasts the data to be sent to all mobile terminals

[0064] S12. The second stage of data transmission, including:

[0065] First case: If the primary user PU can receive the data correctly in the first stage, it will broadcast the ACK frame, if the node SRs correctly decodes the primary user and secondary user data in the first stage, it will broadcast the SR-ACK frame, if the base station BS receives the ACK frame and SR-ACK frame, then selects a best relay from the node SRs, and relays the information to the secondary user;

[0066] The second case: if the primary user receives data incorrectly in the first stage, it will feed back a NACK frame, and if the node SRs cannot correctl...

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Abstract

The invention discloses an energy-carried cooperative CR-NOMA cooperative mode and a relay selection algorithm based on CR-NOMA, comprising: when relay assists two users for information transmission, if the main user is able to decode correctly, then, using all the collected energy to assist the cognitive user to transmit information at the next time slot; otherwise, using the NOMA to continue forwarding the information of the two users; for the multi-relay, proposing the relay selection strategy of the two stages, or solving the set of the correctly decoded relays first; then enabling that the energy remaining and the channel gain from the second jumped relay to the main user are maximized; and solving the closed solution to the interruption probability of the two users and the expression of the throughput. With the invention, while the performances of the main user are ensured, the performances of the sub-user can be increased further so that when the main user reaches the full gain, the cognitive user reaches three-order gain. The energy efficiency of the system is also raised.

Description

technical field [0001] The present invention relates to the field of communication technology, and in particular to a cooperative mode and a relay selection algorithm in cooperative communication based on cognitive network non-orthogonal multiple access (CR-NOMA). Background technique [0002] With the rapid growth of wireless communication services and the resulting environmental problems, green communication and improving spectral efficiency have become the focus of academic attention, and energy efficiency and spectral efficiency have also become two basic indicators of wireless communication design. Cognitive radio technology allows cognitive users to share spectrum with licensed users, which is an effective way to improve spectrum efficiency. Wireless Information and Power Transfer (SWIPT) was also first proposed in 2008. As an effective way to improve energy efficiency, it has also been widely studied in recent years, such as wireless energy harvesting in point-to-poin...

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Application Information

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IPC IPC(8): H04W40/22H04B7/026
CPCH04B7/026H04W40/22Y02D30/70
Inventor 郭延丽陈健杨龙阔永红
Owner XIDIAN UNIV
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