Cognitive Base Station Frequency Switching for Incumbent Protection
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Solution Overview
Problem
Existing mobile communication systems, such as LTE, are not designed to handle cognitive frequency bands effectively, leading to interference with incumbent users when deployed in unauthorized frequency bands, and lack a solution for rapid frequency switching to ensure service continuity.
Innovation Solution
A method and system where a cognitive base station determines a candidate operating frequency point and instructs user equipment (UE) to switch from a currently used frequency point to the candidate point through broadcast information, ensuring minimal interference with incumbent users and maintaining service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mobile communication systems are deployed in cognitive frequency bands to improve spectrum utilization, then spectrum utilization ratio is improved, but interference with incumbent users occurs
Solution Approach 1:
The patent implements a feedback mechanism where the base station continuously monitors the cognitive frequency band for incumbent user signals. When an incumbent user is detected, the system receives feedback information and automatically triggers a frequency point switching process, notifying user equipment to switch to alternative frequency points, thereby eliminating interference while maintaining high spectrum utilization
Solution Approach 2:
The patent employs dynamic frequency point switching where the operating frequency is not fixed but can be changed in real-time based on detected incumbent user activity. The base station maintains a set of candidate frequency points and dynamically selects appropriate frequencies, allowing the system to adapt its spectrum usage patterns to avoid harmful interference while maximizing utilization
2Object-affected harmful factors
If frequency point switching is implemented to avoid interference with incumbent users, then interference is avoided, but service continuity may be affected
Solution Approach 1:
The patent prepares alternative candidate frequency points in advance before interference occurs. When frequency switching is needed, the user equipment can immediately transition to a pre-identified alternative frequency point without prolonged disruption, thereby maintaining service continuity while avoiding interference with incumbent users
Solution Approach 2:
The patent implements rapid frequency switching that minimizes the transition time between frequency points. By rushing through the switching process efficiently and notifying user equipment promptly, the system avoids prolonged service interruption while ensuring interference avoidance is achieved
Data Source
AI summary
The present application relates to of the communication field and discloses a method, device and system for implementing frequency point switch based on CR. The method comprises: determining, by a cognitive base station, a candidate working frequency point for UE deployed in a cognitive frequency band; then sending to the UE broadcast information which at least carries the candidate working frequency point and instructing the UE to switch from the working frequency point currently used thereby to the candidate working frequency point by way of a frequency point switching command. In this way, the UE deployed in the cognitive frequency band can achieve frequency point switch quickly and accurately according to the instruction from the cognitive base station when an incumbent user accesses the working frequency point currently used by the UE, effectively avoiding interference to the incumbent user and thereby ensuring the service performance and service continuity of the system. The present application also discloses a corresponding device and system.