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A d2d communication mode selection method applied to cellular network

A communication mode and cellular network technology, applied in the field of D2D communication mode selection, can solve the problems of increasing mode selection calculation overhead, reducing data transmission efficiency, etc., to achieve the effect of increasing user data transmission rate, improving transmission rate, and increasing user transmission rate

Active Publication Date: 2020-08-28
NANJING DIGITGATE COMM TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent divides the data transmission process into several periods, and performs a mode selection after each period of transmission ends. This artificial division reduces the efficiency of data transmission, and multiple mode selections increase the computational overhead of mode selection.

Method used

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  • A d2d communication mode selection method applied to cellular network
  • A d2d communication mode selection method applied to cellular network

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Embodiment Construction

[0031] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0032] In the whole design method, it is mainly divided into two parts: mode selection and resource allocation. The mode selection is used to determine whether to select a multiplexing mode or a dedicated mode in D2D communication, and to select whether to use a relay in cellular communication. Resource allocation is responsible for allocating resources to users after determining the communication pattern. like figure 1 As shown, the main process steps are:

[0033] Step 1): A pair of D2D users initiate a transmission request, the base station calculates the transmit power of the cellular user according to the preset SNR of the cellular user, calculates the SINR of the D2D user according to the power of the cellular user, calculates the transmit power P of the D2D user, and compares...

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Abstract

The invention discloses a method for selecting a D2D communication mode applied to a cellular network. When a user initiates a D2D communication request at a certain moment, it is first judged whether the SINR of the D2D receiver can reach the threshold under the condition that the power of the D2D transmitter does not exceed the power threshold. ; If the conditions are met, use the multiplexing mode for D2D communication; otherwise, determine whether the cell has remaining dedicated resources, and if so, allocate dedicated resources to the D2D user, and the D2D user uses the dedicated mode for D2D communication. The communication mode selection method of the present invention ensures that cellular users are not interfered by setting the upper limit of D2D transmission power, and sets the lower limit of SINR of D2D users to ensure the communication quality of D2D users. The communication mode also includes a dedicated mode and a cellular mode, and is further improved by introducing a relay station User transfer rate.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for selecting a D2D communication mode applied to a cellular network. Background technique [0002] D2D (device-to-device) communication technology allows users to directly transmit data without forwarding through base stations, so as to increase user transmission rate and reduce network load. The D2D communication mode can be divided into a multiplexing mode, a dedicated mode and a cellular mode. D2D users using the multiplexing mode share the spectrum resources of other cellular users in the cell. This mode can effectively improve the utilization of spectrum resources, but interference will occur between D2D users and cellular users due to the use of the same spectrum resources. D2D users using dedicated mode use dedicated spectrum resources orthogonal to cellular users. In this mode, there is no interference between D2D users and cellular users, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W24/02H04W52/36H04W72/08H04J11/00H04B7/155
CPCH04B7/155H04J11/0026H04W24/02H04W52/367H04W72/541
Inventor 张宏泽鲁蔚锋
Owner NANJING DIGITGATE COMM TECH CO LTD
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