A method and device for dynamic spectrum allocation

Abstract

The present invention discloses a dynamic spectrum allocation method and device. The dynamic spectrum allocation method includes: dividing each transmission frame into a first subframe and a second subframe, and in the first subframe, sending signals to All D2D users and cellular users; in the case that at least one D2D user successfully decodes the signal, select a D2D user from all the D2D users that have successfully decoded according to a preset selection rule, and in the second subframe, by The selected D2D user sends the signal to the cellular user; the cellular user combines the signal sent in the first subframe and the signal sent in the second subframe. Through the above technical solution, the present invention, under the premise of ensuring the normal communication of cellular users, transmits through D2D users cooperating with cellular users, and dynamically increases the spectrum resources allocated to D2D users with the obtained system gain, so that the spectrum can be more efficient use.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a dynamic frequency spectrum allocation method and device. Background technique [0002] D2D (Device-to-Device, inter-device) communication is also called proximity discovery technology, which means that when the distance between the terminals that need to communicate is relatively close, the two can establish a direct link for data transmission under the control of the base station. A communication method that can not only reuse the frequency bands of cellular users through spectrum sharing, but also reduce the system overhead burden caused by base station forwarding through direct device connection to a certain extent, thus realizing green communication. [0003] At this stage, D2D communication is difficult to achieve independent deployment due to factors such as the failure of operators to reach an agreement on charging rules. Therefore, using D2D communication in the e...

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Problems solved by technology

[0003] D2D communication is difficult to achieve independent laying due to the unanimous management and charging rules of operators at the present stage. Therefore, using D2D communication in the existing cellular network to improve the spectrum utilization of the system can effectively use spectrum resources and achieve mitigation. The purpose of the scarcity of spectrum resources, for example, the traditional solution is that D2D users reuse the spectrum of cellular users with extremely small power, and use low-power and short-distance communication in the system in a form similar to substrate noise (Substrate D2D Transmission, referred to as SDT, D2D underlying transmission), however, the spectrum utilization rate in the prior art scheme is low

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