Method, system, central node and sensing node for determining idle frequency band

Abstract

The embodiment of the invention discloses a method, a system, a central node and a sensing node for determining an idle frequency band. The method for determining the idle frequency band comprises the following steps of: sensing a to-be-detected frequency band at a special sensing time slot and determining a candidate frequency band according to a sensing result of the special sensing time slot; transmitting a sensing and scheduling instruction to the sensing node and scheduling the sensing node to sense the candidate frequency band at a common sensing time slot; and receiving the sensing result reported by the sensing node and determining the idle frequency band according to the sensing result reported by the sensing node. Through the embodiment of the invention, signaling expenditure of the central node and the sensing node in a multi-point cooperative frequency spectrum sensing mode is reduced, and the total power consumption of the sensing node is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a method and system for determining an idle frequency band, a central node and a sensing node. Background technique [0002] Cognitive Radio (Cognitive Radio; hereinafter referred to as: CR) technology is one of the most promising technologies to solve the current shortage of spectrum resources. Cognitive radio technology can detect that the fixedly allocated spectrum is not fully used by sensing the wireless spectrum environment. frequency bands, and dynamically access these frequency bands without interfering with primary users (Primary User; PU for short), thereby improving spectrum utilization. [0003] Spectrum sensing is the key technology of cognitive radio. The purpose of spectrum sensing is to monitor and detect the activity of the primary user signal on a specific frequency band. When no primary user signal is detected on the specifi...

AI Technical Summary

Problems solved by technology

[0008] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: In the existing spectrum sensing methods, both intra-frame sensing and inter-frame sensing require the participation of BS and CPE, so the signaling overhead of BS and CPE In addition, the CPE needs to participate in two levels of sensing, intra-frame sensing and inter-frame sensing, and the overall power consumption of the CPE is relatively large. When the CPE is a handheld device, the large power consumption will have a greater impact on the normal use of the CPE. big impact

Images