Dynamic Primary Frequency Assignment Switching in Broadband Wireless Systems
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Solution Overview
Problem
In frequency overlay communication systems, the load on primary frequency assignments (pFAs) becomes concentrated, leading to inefficient use of base station resources, as pFAs cannot be changed during ongoing communications.
Innovation Solution
A method to dynamically change the status of pFAs by requesting terminals to switch between different frequency assignments (FAs), allowing the base station to adjust the load by designating new pFAs and sFAs through MAP Information Elements (IEs), enabling continuous communication while redistributing the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the base station uses a plurality of FAs for communication with terminals, then the available bandwidth is increased, but the load becomes concentrated on the primary FA
Solution Approach 1:
The patent implements dynamic pFA switching capability, allowing the base station to change which FA serves as the primary FA during operation. This dynamic adjustment enables load distribution by switching the pFA role between different FAs, preventing permanent load concentration on a single FA while maintaining the bandwidth benefits of multiple FAs.
2Reliability
If the pFA is fixed during communication, then the communication stability is maintained, but the load cannot be redistributed causing base station inefficiency
Solution Approach 1:
The system introduces dynamic reconfigurability to the FA structure, enabling the pFA to be switched between different FAs during operation. This allows the system to maintain communication stability through controlled transitions while improving productivity by redistributing load across multiple FAs, preventing any single FA from becoming a permanent bottleneck.
Solution Approach 2:
The patent changes the operational parameters of the FA system by introducing the ability to dynamically alter which FA serves as the pFA. This parameter change enables load redistribution without compromising communication stability, as the system can switch pFA designations based on current load conditions while maintaining continuous service.
3Device complexity
If load is concentrated on one FA, then the system structure is simple, but the operational efficiency of the base station deteriorates
Solution Approach 1:
The patent implements dynamic pFA switching that adds minimal complexity to the system structure while significantly improving operational efficiency. The base station can switch which FA serves as the pFA based on load conditions, enabling load distribution without requiring complex multi-pFA configurations for each terminal, thus maintaining relative system simplicity.
Data Source
AI summary
The present invention relates to a method of changing a frequency assignment (FA) status in an improved broadband wireless access system where terminals and base stations communicate with each other by using a plurality of FAs. The base station changes the status of one of secondary FA into the status of the pFA in order to adjust a load of the primary FA, and communicates with the terminal through the pFA of which status is changed. When a response is received from the terminal, the base station changes the status of the pFA and communicates with the pFA of the terminal through a new pFA. The status of a previous pFA between the base station and the terminal is changed into the status of the sFA, and a previous sFA is changed into the pFA, so that communication is performed through new FAs.