Dynamic Radio Frequency Registration Period Adjustment
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Solution Overview
Problem
In cellular wireless communication systems, high loads on the air interface due to simultaneous call originations and periodic registrations can lead to access probe collisions, causing mobile stations to be unable to place or receive calls and send/receive data, with existing solutions like call blocking being inconvenient for users.
Innovation Solution
Implementing a method to dynamically adjust radio-frequency registration periods based on load conditions by determining threshold levels of air interface load and increasing the registration period to reduce the frequency of periodic mobile station registrations, which can be done by detecting reverse-link or forward-link load and considering the stationary nature of mobile stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile stations perform periodic registrations at fixed intervals, then the system can track mobile station locations for call routing, but the air interface becomes overwhelmed with registration requests during high load periods, causing access probe collisions
Solution Approach 1:
The patent implements dynamic adjustment of registration periods based on real-time air interface load conditions. The base station monitors load metrics and adjusts the registration period parameter accordingly, transitioning from fixed to variable intervals. This resolves the contradiction by making the registration frequency adaptive rather than static, allowing the system to maintain reliable registration tracking while preventing air interface overload during high-demand periods.
Solution Approach 2:
The patent changes the temporal parameter of registration intervals from constant to variable based on system conditions. By modifying the registration period parameter dynamically according to air interface load, the system optimizes the balance between location tracking reliability and air interface capacity utilization, preventing access probe collisions while maintaining effective mobile station management.
2Measurement precision
If the registration period is shortened to improve location tracking accuracy, then mobile station location updates occur more frequently, but access probe collisions increase during high load periods
Solution Approach 1:
The patent makes the registration period dynamic rather than fixed, allowing it to adjust based on air interface load conditions. During low-load periods, shorter intervals maintain high location tracking accuracy. During high-load periods, the system automatically extends the registration period to reduce access probe collision probability, thus resolving the contradiction between measurement precision and harmful collision effects.
Solution Approach 2:
The patent implements a feedback mechanism where the base station monitors air interface load conditions and uses this information to adjust registration periods. This closed-loop control allows the system to respond to changing conditions in real-time, reducing registration frequency when collisions are likely while maintaining high frequency when the air interface has capacity, thereby balancing location accuracy with collision prevention.
3Object-affected harmful factors
If call blocking is implemented to reduce air interface load, then access probe collisions are reduced, but user convenience deteriorates as users cannot place or receive calls
Solution Approach 1:
Instead of static call blocking, the patent implements dynamic registration period adjustment that responds to load conditions without preventing call services. This allows the system to reduce registration-related access probe collisions while maintaining call functionality, thus reducing harmful factors without sacrificing user convenience. Users can still place and receive calls while the system manages registration loads adaptively.
Data Source
AI summary
A method for handling registration requests in a cellular wireless communication system. The method includes determining that an air interface in the cellular wireless communication system has at least a threshold level of load. The method further includes, in response to the determination that the system has at lease a threshold level of load, reducing a frequency at which mobile stations register with the cellular wireless communication system via the air interface.