CDRX Offset Adjustment for Multi-RAT Paging Collision Avoidance
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Solution Overview
Problem
There is a challenge in wireless communication systems where connected discontinuous reception (CDRX) periods collide with paging intervals in different radio access technologies (RATs), leading to missed pages and potential data loss due to persistent collisions between LTE CDRX periods and CDMA2000 1×RTT or GSM paging cycles.
Innovation Solution
A method where user equipment (UE) alternates between listening and non-listening periods based on an offset value assigned by the first RAT network, allowing it to determine conflicts with other RATs' paging intervals and obtain a new offset value to avoid collisions, potentially by disconnecting and reconnecting to the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the UE uses a fixed offset value for CDRX listening periods, then the UE can maintain stable connection to the first RAT network, but persistent collisions with paging intervals in the second RAT network occur
Solution Approach 1:
The patent applies dynamics by making the CDRX offset value changeable rather than fixed. The UE dynamically adjusts the offset value when detecting persistent collisions with paging intervals, allowing the system to adapt between stability and collision avoidance based on network conditions
Solution Approach 2:
The patent changes the offset value parameter to resolve collisions. When the UE detects that listening periods consistently conflict with paging intervals, it modifies the offset value to shift the listening period timing, thereby eliminating the persistent collision while maintaining CDRX functionality
2Reliability
If the UE adjusts offset value frequently to avoid collisions, then paging reception reliability improves, but network connection stability deteriorates
Solution Approach 1:
The patent implements feedback by having the UE monitor for persistent collisions between listening periods and paging intervals. Based on this feedback, the UE selectively adjusts the offset value only when necessary, rather than changing it continuously, thus maintaining stability while improving reliability
Solution Approach 2:
The patent applies partial action by adjusting the offset value only to the extent necessary to resolve persistent collisions, rather than making excessive or continuous adjustments. This selective adjustment maintains network connection stability while achieving sufficient paging reception reliability
3Adaptability or versatility
If the UE monitors both LTE and other RATs paging channels, then comprehensive paging coverage is achieved, but collision between CDRX periods and paging intervals increases
Solution Approach 1:
The patent uses dynamics to adjust the CDRX listening period timing based on detected collisions with paging intervals from multiple RATs. By dynamically shifting the offset value, the system maintains comprehensive multi-RAT paging coverage while minimizing time loss due to collisions
Data Source
AI summary
Certain aspects of the present disclosure relate to techniques and apparatus for reducing collisions between CDRX and paging operations.