Network Device Modification Period for Paging Reliability
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Solution Overview
Problem
In LTE systems, user equipment (UE) may miss paging messages due to a discontinuous reception (DRX) cycle being greater than the modification period (MP), leading to delayed or missed updates of paging configuration information.
Innovation Solution
A method where a network device sends first-type system information with a modification period set to ensure it remains unchanged for a duration equal to or greater than the DRX cycle, including a modification indication in paging messages to notify the UE of updates, allowing timely receipt of new paging configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device uses a standard modification period (MP) for system information updates, then system information can be updated regularly, but UE with DRX cycle greater than MP cannot receive paging messages indicating updates
Solution Approach 1:
The patent makes the modification period dynamic by allowing it to be extended to match the UE's DRX cycle when the DRX cycle is greater than the standard MP. This dynamic adjustment ensures that paging messages are always transmitted at times when UEs are awake and can receive them, resolving the contradiction between regular updates and adaptability to different DRX configurations.
Solution Approach 2:
The patent changes the time parameter of the modification period based on the UE's DRX cycle configuration. When a UE reports a DRX cycle greater than the standard MP, the network device adjusts the MP to match the DRX cycle, ensuring that system information updates are synchronized with the UE's wake-up schedule and can be reliably received.
2Productivity
If the network device sends paging messages at standard MP intervals, then system information updates are transmitted regularly, but UEs with longer DRX cycles miss these messages
Solution Approach 1:
The patent dynamically adjusts the paging message transmission schedule to match the UE's DRX cycle when it exceeds the standard MP. This ensures that paging messages are transmitted at times when UEs are guaranteed to be awake and listening, eliminating information loss while maintaining transmission efficiency.
Solution Approach 2:
The patent implements a feedback mechanism where the UE reports its DRX cycle configuration to the network device. Based on this feedback, the network device adjusts the modification period and paging message transmission timing to ensure reliable delivery, preventing information loss while maintaining efficient update transmission.
3Reliability
If the network device extends the modification period to match UE DRX cycle, then UE can reliably receive paging messages, but system information update frequency decreases
Solution Approach 1:
The patent segments the system information update process into two parts: frequent broadcasting of system information blocks and periodic paging messages for update notifications. By extending only the paging message interval to match the DRX cycle while maintaining frequent SIB broadcasting, the system ensures reliable notification delivery without significantly delaying actual system information updates.
Solution Approach 2:
The patent uses paging messages as preliminary notifications to alert UEs about upcoming system information changes. Even when the modification period is extended to match the DRX cycle, the paging message serves as advance notice, allowing UEs to prepare for and reliably receive update information at the next wake-up point without significant delay.
Data Source
AI summary
A system information sending method is provided, to resolve a technical problem that UE may not receive a paging message when a DRX cycle is greater than an MP. A network device may separately set a modification period (namely, a first period) for first-type system information (which, for example, may include paging configuration information), to ensure that the first-type system information is not to be modified in the first period. For example, the first period may be greater than a DRX cycle. In this way, when a terminal device wakes up based on the DRX cycle, a time when the terminal device wakes up is still in the first period. The terminal device may normally receive a paging message indicating that the paging configuration information is to be modified, thereby obtaining new paging configuration information in time and avoiding missing a subsequent paging message.