DSDS Paging Block Rate Control via Biased Arbitration
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Solution Overview
Problem
Dual-SIM-dual-standby mobile communication devices face paging collisions when both subscriptions attempt to receive network messages simultaneously, leading to unpredictable and potentially disproportionate paging block rates due to the inability to reschedule paging sessions.
Innovation Solution
Implementing a biased coin toss algorithm or Markov chain algorithm to manage paging collisions, allowing for control over paging block rates by setting a paging blocking bias, ensuring equal or unequal blocking rates for both subscriptions over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a DSDS device uses a single RF transceiver time-shared between two subscriptions, then device complexity is reduced, but paging collision handling becomes unpredictable and unreliable
Solution Approach 1:
The patent implements dynamic arbitration mechanisms that adaptively adjust paging DRX cycle offsets and selection probabilities based on real-time network conditions and subscription priorities. The system continuously monitors paging collision patterns and modifies timing parameters dynamically rather than using fixed static configurations, thereby improving reliability while maintaining single RF transceiver usage.
Solution Approach 2:
The system changes key parameters such as paging DRX cycle lengths, timing offsets, and selection probabilities to optimize collision handling. By adjusting these parameters based on network conditions and subscription importance, the system achieves more predictable and reliable paging collision resolution without requiring additional hardware resources.
2Adaptability or versatility
If paging DRX cycle length is determined entirely by the network, then network compatibility is maintained, but the device cannot avoid paging collisions between subscriptions
Solution Approach 1:
The device performs preliminary actions by calculating and applying timing offsets to paging DRX cycles before collisions occur. The system proactively adjusts the paging timing for each subscription based on predicted collision patterns, thereby preventing collisions in advance while maintaining compliance with network-defined DRX cycle lengths. This preliminary timing adjustment ensures both network compatibility and reliable collision avoidance.
3Productivity
If one subscription is blocked during paging collision, then RF transceiver availability is ensured for the other subscription, but paging block rates become disproportionate and unpredictable
Solution Approach 1:
The patent introduces asymmetric treatment of subscriptions during paging collisions by applying different selection probabilities and timing offsets based on subscription priorities. Instead of symmetric random selection, the system uses biased probability distributions that favor higher-priority subscriptions, creating predictable and proportional blocking rates that reflect user-defined importance levels while ensuring efficient RF transceiver utilization.
4Adaptability or versatility
If the device cannot manipulate or reschedule paging DRX cycles, then network control is maintained, but collision avoidance capability is lost
Solution Approach 1:
The system operates in an additional dimension by introducing timing offset adjustments that are layered on top of network-defined DRX cycle lengths. While the network controls the fundamental DRX cycle duration, the device independently manipulates the timing phase and offset parameters, creating a secondary control dimension that enables collision avoidance without challenging network authority over primary DRX configuration.
Data Source
AI summary
The various embodiments include methods for managing how a DSDS mobile communication device that is accessing an arbitrary combination of any two mobile telephony networks processes paging collisions. The embodiment methods promote the control of the paging block rates for two distinct subscriptions, in which a subscription's paging block rate is the long-term percentage of its blocked paging messages over its total number of received paging messages. In the various embodiments, a mobile communication device may use a paging blocking bias to achieve a particular paging blocking rate. The paging blocking bias may be set or adjusted through various means to cause a first subscription to have a paging blocking rate that is less than, equal to, or greater than a paging blocking rate for a second subscription.