A downlink user resource allocation method for noma-d2d hybrid system

A NOMA-D2D and hybrid system technology, which is applied in the field of downlink user resource allocation, can solve problems such as life limitation, maximize data transmission rate, meet data transmission requirements, and improve data transmission rate

Active Publication Date: 2020-01-10
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Since most D2D transceivers are powered by batteries, the lifetime of D2D transmitters is limited by the energy storage capacity of batteries, so the energy limitation of D2D transceivers is one of the most fundamental challenges in the practical application of D2D communication.

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  • A downlink user resource allocation method for noma-d2d hybrid system
  • A downlink user resource allocation method for noma-d2d hybrid system
  • A downlink user resource allocation method for noma-d2d hybrid system

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0022] figure 1 The schematic diagram of the NOMA-D2D hybrid network downlink system model shown includes two NOMA users: user 1 and user 2, where the channel condition between user 1 and the base station is relatively lower than that between user 2 and the base station. Good; when the D2D transmitter offloads data traffic to the base station due to energy constraints, D2D will directly obtain ...

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Abstract

The invention discloses a method for allocating downlink user resources for a NOMA-D2D hybrid system, comprising: updating current network information by a base station; and allocating transmission power P and bandwidth W by the base station C To provide NOMA users with the throughput required for NOMA user communication, and to ensure the QoS requirements of NOMA users; the base station starts from the bandwidth W D Allocate bandwidth B to NOMA users, and obtain power P from transmission power P while satisfying the QoS of NOMA users through spectrum exchange t_s ; The base station will bandwidth W D The remaining bandwidth and power P in t_s Assigned to D2D receivers to increase the data transmission rate R of D2D receivers D . The downlink user resource allocation method used in the NOMA-D2D hybrid system provided by the present invention can be used in a hybrid system where NOMA users and D2D users coexist, when the D2D transmitter unloads data traffic to the base station due to energy constraints, through spectrum exchange, While satisfying the QoS of NOMA users, the data transmission rate of the D2D receiver is effectively improved.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and more specifically, relates to a downlink user resource allocation method used in a NOMA-D2D hybrid system. Background technique [0002] With the current growth of data center-related applications, mobile operators need to handle exponentially increasing data traffic. Because D2D (Device-to-device, device-to-device) communication can allow two transceivers to bypass BS (base station, base station) for direct wireless communication, the use of D2D communication in wireless cellular networks can improve spectrum efficiency, increase communication capacity, and reduce Transmission delays and extended device battery life. Since most D2D transceivers are powered by batteries, and the lifetime of D2D transmitters is limited by the energy storage capacity of batteries, the energy limitation of D2D transceivers is one of the most fundamental challenges in the practical applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/08H04W4/70H04W16/14
CPCH04W16/14H04W72/0453H04W72/0473H04W72/54
Inventor 张靖刘国亨刁亚杰周清洁韩竞
Owner HUAZHONG UNIV OF SCI & TECH
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