D2D resource allocation method and device for densely distributed user groups of cellular system
A technology for cellular users and cellular systems, applied in machine-to-machine/machine-type communication services, electrical components, wireless communications, etc. The effect of system throughput
Active Publication Date: 2020-02-25
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0005] In view of the above problems, the present invention aims to provide a D2D resource allocation method and device for densely distributed user groups in a cellular system, so as to solve the problem of shortage of spectrum resources in the scenario of densely distributed users, and at the same time limit cross-layer interference and shared resources in the area. layer interference, and maximize system throughput
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[0025] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, and Not all examples.
[0026] like figure 1 Shown is a schematic diagram of the regional user distribution scene of the present invention, D2D users (including DP sending user DT and DP receiving user DR) share resources with CU, and they build a direct communication link to transmit and receive data without forwarding through the base station . Compared with the uplink, the resource utilization rate of the downlink of the cellular system is higher, so the present invention uses DP to reuse the uplink resources of the cellular system under the control of the base station. If the multiplexed CU resources in the present...
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The invention belongs to the technical field of communication, and particularly relates to a D2D resource allocation method and device for densely distributed user groups of a cellular system, and themethod comprises the steps of enabling a base station to acquire the interference information of D2D user pairs through receiving CSI reported by a user terminal, and obtain the distribution conditions of the D2D user pairs and cellular users; constructing a user group according to the distribution condition in the region; determining a reusable cellular user resource set corresponding to the divided user groups based on the divided user groups; limiting the distance and cross-layer interference between the D2D user pair and the cellular user; selecting proper cellular user resources to perform resource pre-allocation; based on the limitation of cross-layer interference and the influence of co-layer interference, adopting a shuffled frog leaping algorithm io further adjust the situationthat D2D users in each user group reuse cellular user resources, and performing multiple iterations under the situation that system interference is limited so as to maximize the system throughput; when the resources are allocated, considering the QoS requirement of each UE so that the user experience can be ensured.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a device-to-device (D2D) resource allocation method and device for densely distributed user groups in a cellular system. Background technique [0002] In today's global mobile Internet, various smart terminals have sprung up like mushrooms. While they are convenient for people's daily life, they also bring a surge in business demand. Massive mobile communication data makes the originally limited spectrum resources more and more complex. more nervous. In order to effectively improve the spectrum utilization rate of the cellular network and alleviate the shortage of spectrum resources, D2D technology is proposed as a key technology in the 3GPP R12 protocol. D2D communication refers to the communication between mobile user equipment (User Equipment, UE) in the physical location, the data is no longer forwarded by the base station, but directly establishes a...
Claims
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IPC IPC(8): H04W4/70H04W16/14H04W72/04
CPCH04W4/70H04W16/14H04W72/0453H04W72/53
Inventor 陈发堂张云李小文王丹王华华孟昭侯宁宁
Owner CHONGQING UNIV OF POSTS & TELECOMM