Repeat Paging Control Signal for Wireless Channel Optimization
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Solution Overview
Problem
In cellular radio access networks, when a RAN controller sends quick-repeat page directives to multiple BTSs, some BTSs continue transmitting page messages even after the mobile station has responded, leading to unnecessary burden on the paging channel in other coverage areas.
Innovation Solution
The RAN controller sends a paging-stop directive to each BTS upon receiving a page response from the mobile station, causing them to discontinue the series of page messages, or implements a query-response process to determine whether to continue repeat-paging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RAN controller sends quick-repeat page directives to multiple BTSs to page a mobile station, then the paging reliability is improved, but the paging channel becomes overloaded with unnecessary transmissions
Solution Approach 1:
The system implements a feedback mechanism where BTSs monitor for mobile station responses to page messages. When a response is detected, the BTS sends a notification to the RAN controller, which then sends a paging-stop directive to other BTSs to cease repeat paging. This feedback loop allows the system to maintain high paging reliability while eliminating unnecessary transmissions by stopping repeat paging operations once the mobile station responds.
2Reliability
If BTSs continue transmitting page messages after receiving a page response, then the paging completeness is improved, but the air interface resources are wasted
Solution Approach 1:
The system uses feedback from BTSs to the RAN controller about mobile station responses. When a BTS receives a page response, it notifies the RAN controller, which then sends paging-stop directives to other BTSs. This ensures paging completeness by confirming when the mobile station has been successfully located, while simultaneously preventing air interface resource waste by stopping unnecessary repeat transmissions in other coverage areas.
Solution Approach 2:
The system discards unnecessary page transmission operations once the mobile station responds. The RAN controller identifies when a page response has been received and terminates repeat paging operations in other BTSs, effectively discarding the remaining unnecessary transmissions and recovering air interface resources for other communications.
3Measurement precision
If the RAN controller waits for page response notifications before stopping repeat paging, then the paging accuracy is improved, but the time delay increases
Solution Approach 1:
The system takes preliminary action by having BTSs continuously monitor for mobile station responses during the repeat paging process. As soon as a response is detected, the BTS immediately notifies the RAN controller, which can then immediately send paging-stop directives to other BTSs. This preliminary monitoring and immediate response mechanism ensures paging accuracy while minimizing time delay compared to waiting for a predetermined number of attempts or fixed time intervals.
Data Source
AI summary
Disclosed herein is a method for repeat paging in a wireless communication system. In accordance with the method, a RAN controller will send a repeat-paging directive to a plurality of BTSs to cause each BTS to begin broadcast of a series of page messages destined to a target mobile station. While transmitting the series, one of the BTSs will then receive from the mobile station a page response, and the BTS will responsively provide to the RAN controller a notification of the page response. In response to receipt of the notification, the RAN controller will then send a paging-stop directive to at least each other BTS of the plurality, and each BTS that receives the paging-stop directive will responsively discontinue broadcasting the series of page messages before completing broadcast of the entire series of page messages, thereby helping to conserve air interface resources.