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User pairing and relay selection joint algorithm based on cooperative non-orthogonal multiple access system

A non-orthogonal multiple access and user pairing technology, applied in the transmission system, transmission monitoring, electrical components, etc., can solve the problem of not considering multi-user and multi-relay scenarios, and achieve the effect of improving interrupt performance and traversal rate

Pending Publication Date: 2021-05-14
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The existing technical solutions only consider the user pairing problem and relay selection problem in multi-user scenarios or multi-relay scenarios, and do not consider the multi-user and multi-relay scenarios in actual situations

Method used

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  • User pairing and relay selection joint algorithm based on cooperative non-orthogonal multiple access system
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  • User pairing and relay selection joint algorithm based on cooperative non-orthogonal multiple access system

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Embodiment

[0090] The application scenarios of the present invention are as figure 1 As shown, the system includes a base station, M repeaters, and N users, denoted as BS, {R i ,i∈[1,M]}, {U j,j∈[1,N]}. All nodes are equipped with a single antenna and work in a half-duplex mode. Since the base station and users are far away or there are obstacles, there is no direct link between them.

[0091] In the step S1, it may happen that the primary user D 1 A situation where the own signal cannot be decoded with serial interference cancellation techniques. There are two specific situations: one is that the repeater cannot decode the signal S 1 , so the decoding and forwarding of the signal cannot be carried out; the second is in D 1 Since the received signal-to-noise ratio does not meet the target signal-to-noise ratio, the serial interference cancellation technology cannot be used to decode its own signal. Denote the outage probability for this case as but

[0092]

[0093] In the st...

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Abstract

The invention relates to the technical field of wireless communication, in particular to a user pairing and relay selection joint algorithm based on a cooperative non-orthogonal multiple access system. The algorithm comprises the following steps: S1, selecting a user farthest from a base station from all users in the coverage range of the base station as a main user; S2, selecting a repeater with the best channel condition to the main user from all repeaters as a relay; S3, after the main user and the relay are selected, obtaining a user set CR meeting the target rate of the main user in the service range of the relay; S4, selecting a user with the maximum instantaneous rate from the user set CR as a secondary user; and S5, circularly carrying out the steps until all users in the coverage range of the base station complete user pairing and relay selection. The invention provides a user pairing and relay selection joint algorithm of a cooperative non-orthogonal multiple access system in a multi-user and multi-relay scene, a cooperative transmission strategy improves the interruption performance of the whole system, and compared with a traditional relay network, the cooperative transmission method has great advantages in transmission performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a joint algorithm of user pairing and relay selection based on a cooperative non-orthogonal multiple access system in a multi-user and multi-relay scenario. Background technique [0002] In recent years, mobile communication technology has developed rapidly, and the Internet of Everything system that provides high-speed transmission for millions of people and billions of devices will become one of the basic application scenarios of mobile communication in the future [1]. It is estimated that in the next ten years, the number of mobile devices such as mobile phones, tablets, wearable devices, and wireless headsets worldwide will exceed 125 billion [2], [3]. At the same time, the wireless spectrum resources used to carry mobile communication services have become very tight, and how to solve the shortage of spectrum resources has become a hot spot in mobil...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/04H04W40/12H04W40/22H04B17/309H04B17/382
CPCH04W40/04H04W40/12H04W40/22H04B17/309H04B17/382
Inventor 龙恳王奕谭路垚
Owner CHONGQING UNIV OF POSTS & TELECOMM
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