Multi-mode Mobile Station Paging Interval Conflict Resolution
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Solution Overview
Problem
Multi-mode mobile stations with a single RF chain face conflicts between paging intervals of different radio access technologies (RATs) like WiMAX and CDMA, leading to missed paging messages due to overlapping intervals, as they can only listen to one system at a time.
Innovation Solution
A method and apparatus that allow a multi-mode mobile station to determine and configure paging cycles and offsets for one RAT to avoid conflicts with another RAT, enabling simultaneous listening to both systems by calculating and setting appropriate WiMAX and CDMA paging parameters through specific equations and messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-mode mobile station with a single RF chain listens to paging intervals of multiple RATs simultaneously, then it can receive paging messages from both networks, but the paging intervals of different RATs may conflict and cause missed messages
Solution Approach 1:
The mobile station determines and configures paging parameters (paging interval, paging offset, TPC values) for one RAT based on the paging parameters of another RAT to avoid conflicts. Specifically, the MS calculates appropriate WiMAX paging parameters considering the CDMA paging interval, or vice versa, ensuring that paging occasions do not overlap in time
Solution Approach 2:
The mobile station performs preliminary determination of paging parameters before entering idle mode in both RATs. By pre-calculating and configuring compatible paging parameters, the MS ensures that no conflicts will occur during subsequent paging operations, preventing missed messages before they can happen
2Reliability
If the mobile station configures paging parameters to avoid conflicts between RATs, then paging message reception is improved, but the complexity of parameter determination and configuration increases
Solution Approach 1:
The mobile station autonomously determines and configures its own paging parameters by internally calculating compatible values based on the other RAT's parameters. The MS performs self-configuration without requiring complex network coordination or external assistance, reducing overall system complexity while ensuring conflict-free paging intervals
3Device complexity
If the mobile station uses a single RF chain to listen to both RATs, then device simplicity is maintained, but it can only listen to one system at a time causing paging conflicts
Solution Approach 1:
The mobile station uses periodic paging intervals that are carefully coordinated between the two RATs. By configuring the paging periods and offsets such that they do not overlap, the MS can switch between RATs periodically without missing paging messages, enabling reliable dual-RAT monitoring with a single RF chain
Solution Approach 2:
The mobile station resolves the time-domain conflict by introducing parameter dimension coordination - configuring paging parameters across multiple dimensions (interval, offset, TPC) to ensure non-overlapping paging occasions. This multi-dimensional parameter coordination allows sequential RF chain usage without losing paging messages from either RAT
Data Source
AI summary
Certain embodiments of the present disclosure provide techniques for a multi-mode mobile station to establish paging intervals in different radio access technology (RAT) networks that do not collide.