Paging Channel Queue Management for Wireless Networks
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Solution Overview
Problem
Wireless communication networks face performance degradation due to overload conditions caused by excessive slotted messages on the paging channel, leading to delayed or dropped non-slotted messages that are crucial for establishing real communications with mobile stations.
Innovation Solution
Implement a method where the Radio Access Network (RAN) determines the level of occupancy of the paging channel and adjusts transmission priorities, assigning higher priority to non-slotted messages when the occupancy exceeds a load threshold, ensuring timely transmission of these messages and preventing channel overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If slotted messages are assigned higher transmission priority than non-slotted messages, then call setup delay is reduced, but the paging channel may become overloaded and non-slotted messages may be delayed or dropped
Solution Approach 1:
The patent implements dynamic priority adjustment where the transmission priority of slotted and non-slotted messages is not fixed but changes based on real-time paging channel occupancy levels. When occupancy exceeds a threshold, the system dynamically switches priority assignment to prevent overload, thereby maintaining both low call setup delay and high message delivery reliability under varying network conditions
Solution Approach 2:
The system changes the occupancy threshold parameter to control when priority switching occurs. By monitoring paging channel occupancy and comparing it against configurable thresholds, the system can adjust message transmission priorities based on network load conditions, preventing channel overload while maintaining efficient call setup
2Reliability
If the paging channel occupancy threshold is set low, then non-slotted messages are protected from overload, but slotted messages experience increased transmission delays
Solution Approach 1:
The patent allows the occupancy threshold parameter to be adjusted and optimized based on network conditions and service requirements. By tuning this parameter, network operators can balance between protecting non-slotted messages from overload and minimizing delays for slotted messages, with the threshold adaptable to different traffic patterns and network states
3Productivity
If the paging channel occupancy threshold is set high, then slotted messages are transmitted quickly, but the paging channel may become overloaded and performance degrades
Solution Approach 1:
The system continuously monitors paging channel occupancy and uses this feedback to dynamically adjust message transmission priorities. When occupancy approaches the threshold, the system provides feedback by switching priority assignment, which prevents channel overload and maintains overall paging channel performance while still allowing high transmission rates for slotted messages under normal conditions
Data Source
AI summary
A method and apparatus for more efficiently scheduling transmission of page messages over a paging channel in a radio access network (RAN). The RAN, which generally assigns slotted messages a higher transmission priority than non-slotted messages, may determine a level of occupancy of the paging channel either periodically, continuously, or responsive to a triggering event. Thereafter, the RAN may compare the level of occupancy to a load threshold, which may either be based on (i) a predicted probability of non-slotted messages that will result from slotted messages in the RAN, or (ii) a ratio of non-slotted messages to slotted messages in the RAN. If the load threshold is based on the ratio, the RAN may determine the load threshold before making the comparison. After making the comparison, the RAN may assign non-slotted messages a higher transmission priority than slotted messages if the level of occupancy exceeds the load threshold.