Method for avoiding interfering hidden terminal communication of authorized users

Abstract

The invention provides a method for avoiding interfering hidden terminal communication of authorized users. The method comprises the steps that A, a cognitive radio device performs spectrum detection on an authorized transmitter through an energy detection method and reports self-geographic information and perceived energy information of the authorized transmitter to a decision center; B, the decision center calculates the geographic information and the coverage of the authorized transmitter according to the geographic information and the energy information of the authorized transmitter, which are reported by the cognitive radio device; C, the decision center determines a cognitive radio base station with the coverage overlapped with the coverage of the authorized transmitter according to the geographic position and the coverage of the authorize transmitter and informs the determined cognitive radio base station; and D, the cognitive radio base station changes an access frequency spectrum according to a corresponding mechanism after receiving the notice from the decision center, quits frequencies used by authorized users and updates available frequency spectrum lists.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for avoiding interference with authorized user hidden terminal communication. Background technique [0002] Cognitive radio (CR) is a technology that dynamically allocates spectrum resources by sensing spectrum. usage efficiency. A cognitive radio network includes a base station and multiple cognitive users. The cognitive users detect the existence of authorized users through the perception of the channel. When a cognitive user detects the existence of an authorized user in a certain frequency band, the cognitive user performs spectrum switching to leave the frequency band to avoid interference to the authorized user. [0003] In an actual network, the cognitive radio equipment not only needs to detect the authorized transmitter signal, but also needs to detect the authorized user receiver which is more sensitive to interference, or take corresponding meas...

AI Technical Summary

Problems solved by technology

[0010] Although the method based on converting the detection of authorized user receivers to the detection of authorized transmitter signals is effective, this expansion of the spectrum range will inevitably cause some waste of access to spectrum opportunities.

For example, the cognitive radio user transmitter does not actually cause interference to some authorized users, but due to the expansion of the detection range, the cognitive radio user detects the signal of the authorized transmitter, thus giving up access to the original possible access spectrum of opportunities

Images