Method for distributing spectrum resources between cellular users and D2D users in same cell

Abstract

The invention relates to the field of wireless mobile communications, and provides a method for distributing spectrum resources between cellular users and D2D users in the same cell. The method specifically comprises the steps that in the same cell, according to the smallest transmission rate requirement of each cellular user, a constraint condition which needs to be met by the transmission rate of the communication of the user is set; under the constraint conditions, certain spectrum resources are distributed to the cellular users and the D2D users, and the problem that the total number of the spectrum resources distributed to the D2D users is maximized is expressed in mathematics; the problem expressed in the mathematics is transformed into a Lagrange dual problem equivalent to the problem; the Lagrange dual problem is solved to obtain the optimal solution of the problem in the mathematics; the spectrum resources are distributed to the cellular users and the D2D users according to the optimal solution. Under the condition of the limited spectrum resources, the transmission requirements of the cellular users are guaranteed, and meanwhile the total number of the spectrum resources distributed to the D2D users is maximized.

Description

technical field [0001] The invention relates to the field of wireless mobile communication, and provides a method for allocating frequency spectrum resources between cellular users and D2D users in the same cell. Background technique [0002] In recent years, with the increase of mobile devices and applications, a large number of multimedia services have emerged. However, at present, the utilization rate of spectrum resources in the cellular network is not high, that is to say, among the allocated spectrum resources, a large proportion of resources are in an idle state, which causes a great degree of waste of spectrum resources. Device-to-Device (D2D) communication aims at this problem, so that communication can be directly established between users in the same cell, and the information transmission process can be realized by multiplexing cellular spectrum resources. The assisted use of the D2D network under the cellular network not only reduces the transmission delay, impr...

AI Technical Summary

Problems solved by technology

Such an approach may cause cellular users to occupy most of the spectrum resources, even exceeding their own transmission needs; and it is difficult for D2D users to achieve high efficiency due to insufficient allocation of spectrum resources, especially when the user density is high. There is still a lot of room for improvement in the utilization of spectrum resources in D2D communication

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