Paging Channel Monitoring During Extended CG SDT
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently monitoring paging channels during small data transmission procedures, particularly when extended configured grant (CG) periodicities are used, leading to undesirable unavailability of paging reception due to prolonged monitoring gaps.
Innovation Solution
Implementing a method and apparatus that enable a terminal to monitor paging channels during ongoing small data transmission (SDT) procedures by using extended CG SDT periodicities, calculated based on hyper system frame number (H-SFN) and system frame number (SFN) information, even when a timer associated with RRC connection resumption is not running.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If extended CG SDT periodicity is used for small data transmission, then transmission periodicity is reduced and data transmission efficiency is improved, but paging channel monitoring availability deteriorates due to prolonged monitoring gaps
Solution Approach 1:
The patent implements dynamic paging channel monitoring by allowing the terminal to flexibly adjust monitoring behavior based on the running state of the T319 timer. When the timer is running, monitoring is suspended to prioritize SDT; when not running, monitoring is restored to ensure paging availability. This dynamic adaptation resolves the contradiction between extended transmission periodicity and monitoring availability.
Solution Approach 2:
The patent changes the monitoring parameter state based on timer conditions. By using the T319 timer running state as a control parameter, the system transitions between two monitoring modes: complete monitoring (timer not running) and selective monitoring (timer running). This parameter-based control allows the system to optimize for either transmission efficiency or monitoring availability depending on operational context.
2Use of energy by moving object
If paging channel monitoring is suspended during SDT procedure with extended CG periodicity, then monitoring overhead is reduced and energy consumption is saved, but network responsiveness deteriorates due to unintended unavailability of paging reception
Solution Approach 1:
The patent dynamically adjusts paging channel monitoring based on the T319 timer state. During active SDT procedures when the timer is running, monitoring is suspended to save energy. When the timer expires or is reset, monitoring resumes automatically. This dynamic behavior ensures energy efficiency during data transmission while maintaining network responsiveness when SDT is not active.
Solution Approach 2:
The patent implements periodic monitoring restoration tied to the T319 timer expiration. Instead of continuous monitoring or complete suspension, the system periodically restores monitoring capability when the timer expires, creating a rhythmic pattern of monitoring suspension and restoration that balances energy consumption with network responsiveness.
3Reliability
If continuous paging channel monitoring is maintained during SDT procedure, then network responsiveness is improved and paging reception availability is ensured, but monitoring complexity increases and processing overhead rises
Solution Approach 1:
The patent simplifies monitoring complexity by making it dynamic rather than static. Instead of implementing complex continuous monitoring logic, the system uses a simple timer-state-based decision: if T319 is running, suspend monitoring; if not running, perform monitoring. This dynamic approach reduces processing complexity while maintaining reliability when needed.
Solution Approach 2:
The patent extracts the monitoring decision logic from continuous complex processing and separates it into timer-based conditional execution. By extracting the monitoring function and making it optional based on timer state, the system reduces overall processing complexity while preserving paging reception availability when the timer is not running.
4Reliability
If monitoring gap is extended for CG SDT with long periodicity, then data transmission window is increased and transmission reliability is improved, but paging channel availability deteriorates during the gap period
Solution Approach 1:
The patent dynamically manages the trade-off between transmission window and paging availability using the T319 timer. During the extended monitoring gap when the timer is running, paging monitoring is suspended to maintain transmission reliability. When the timer expires, monitoring resumes immediately, minimizing the total time of paging unavailability while maintaining adequate transmission windows.
Solution Approach 2:
The patent implements periodic restoration of paging monitoring tied to timer expiration. The system creates a periodic pattern where monitoring is suspended during SDT transmission windows and restored when the timer expires. This periodic action ensures that paging channel availability is maintained in a rhythmic fashion, reducing total unavailability time while preserving transmission reliability during active periods.
Data Source
AI summary
Provided are a method and apparatus for monitoring a paging channel in association with a small data transmission procedure in a wireless communication system. A terminal may initiate a small data transmission (SDT) procedure. Further, the terminal may monitor a paging channel, while the initiated SDT procedure is ongoing and a timer is not running. The timer may be associated with handling a failure in resumption of a radio resource control (RRC) connection. The paging channel may be monitored based on that i) the SDT procedure is associated with configured grant (CG) SDT and ii) an extended CG SDT periodicity is configured. The extended CG SDT periodicity may be used to calculate a transmission periodicity for uplink that corresponds to a resource determined using hyper system frame number (H-SFN) information and system frame number (SFN) information.