Dynamic Receive Chain Switching for Paging Collision Reduction
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) operating in idle mode with a single receive chain experiences paging performance degradation due to collisions between paging signals from multiple subscriptions, as it cannot concurrently monitor pages for multiple subscriptions within the same frequency band or frequency band group, leading to coverage loss and increased collisions.
Innovation Solution
The UE dynamically switches to additional receive chains with higher-order antennas, allowing concurrent operation of multiple receive chains to allocate subscriptions to optimal antenna paths based on performance metrics, such as RSRP, RSSI, and SNR, to improve paging performance and reduce collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE operates in idle mode with a single receive chain to conserve power, then power consumption is reduced, but paging performance degrades due to collisions between paging signals from multiple subscriptions
Solution Approach 1:
The patent implements dynamic switching between receive chains based on collision detection. The system transitions from a static single-receive-chain configuration to a dynamic multi-receive-chain configuration when paging collisions are detected, allowing the UE to adapt its receive capabilities according to operational conditions while maintaining power efficiency during normal operation
Solution Approach 2:
The patent changes the operational parameters of the receive chains by switching from idle mode (single receive chain) to connected mode (multiple receive chains with higher-order antennas). This parameter change enables the system to resolve paging collisions by activating additional receive chains with diverse antenna configurations when needed
2Device complexity
If the UE uses a single receive chain in idle mode, then device complexity is reduced, but the UE cannot concurrently monitor pages for multiple subscriptions within the same frequency band
Solution Approach 1:
The patent makes the receive chains universal by enabling them to serve multiple subscriptions through dynamic switching. The same receive chains used for single-subscription operation in idle mode can be reconfigured to handle multiple subscriptions simultaneously in connected mode, thereby increasing versatility without requiring separate dedicated receive paths for each subscription
Solution Approach 2:
The patent resolves the limitation of single-receive-chain operation by introducing spatial diversity through higher-order antennas (beyond traditional diversity antennas). This dimensional expansion in the antenna space allows concurrent monitoring of multiple subscriptions within the same frequency band by utilizing additional spatial receive paths
3Reliability
If the UE operates in coverage-limited areas like dense urban regions, then service availability is maintained, but paging collisions increase and coverage loss occurs
Solution Approach 1:
The patent applies local quality by selecting specific antenna paths and receive chains based on local signal conditions. In coverage-limited areas, the system identifies which receive chains and antenna paths provide the best signal quality for each subscription and dynamically allocates them accordingly, optimizing paging reception performance for the specific local environment rather than using a uniform configuration
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A wireless device may detect a collision of paging messages for a first subscription and a second subscription of the wireless device during a paging processing duration, the first receive chain including at least one antenna path. The wireless device may determine that, in a connected mode, it is configured to operate a second receive chain with one or more additional antenna paths, and may allocate, for a subsequent instance of the paging processing duration, the first subscription to one of the first receive chain or the second receive chain, and the second subscription to the other of the first receive chain or the second receive chain. The wireless device may monitor, during the subsequent instance of the paging processing duration, for a first paging message and a second paging message using the first and second receive chains.