Paging Subgroup Mechanism for Idle Mode Power Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In broadband wireless access systems, mobile stations in idle mode face challenges with efficient system information updates and power management, as base stations may need to transmit paging messages frequently and mobile stations may miss system updates due to subframe synchronization issues, leading to unnecessary power consumption and decoding overhead.
Innovation Solution
The introduction of a paging subgroup mechanism, where mobile stations receive paging information and system updates during specific subframes, allowing them to wake up only for designated intervals and decode paging messages using CRC-masked control information, thereby reducing power consumption and improving update efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations transmit paging messages frequently to ensure mobile stations receive updates, then system information update reliability is improved, but mobile station power consumption increases
Solution Approach 1:
The patent implements periodic paging occasions where mobile stations wake up at predetermined intervals to receive paging messages and system information updates. Instead of continuous monitoring, the mobile station enters idle mode and only activates during specific paging occasions, thereby reducing power consumption while ensuring timely receipt of system updates.
Solution Approach 2:
The patent establishes predetermined paging occasions and cycles in advance, allowing mobile stations to plan their wake-up times and power consumption patterns. The base station also prepares and transmits paging information at these pre-scheduled times, ensuring both parties are synchronized without requiring continuous communication.
2Loss of time
If mobile stations wake up frequently to check for paging messages, then paging message reception timeliness is improved, but power consumption increases
Solution Approach 1:
The patent defines specific paging occasions and cycles where mobile stations wake up to check for paging messages. By concentrating wake-up activities at these predetermined periodic intervals rather than continuously monitoring, the system achieves timely paging message reception while significantly reducing overall power consumption during idle mode.
Solution Approach 2:
The patent allows the mobile station to dynamically switch between idle mode (low power) and active mode (high power) based on whether it is a paging occasion. This dynamic state transition optimizes the balance between timely paging message reception and power consumption by being active only when necessary.
3Measurement precision
If mobile stations decode all control information in every subframe, then decoding accuracy is improved, but processing overhead and power consumption increase
Solution Approach 1:
The patent extracts and processes only the relevant paging control information during designated paging occasions, rather than decoding all control information in every subframe. The mobile station selectively receives and decodes paging messages only when needed, reducing processing overhead and power consumption while maintaining decoding accuracy for the extracted relevant information.
Solution Approach 2:
The patent implements partial decoding action where the mobile station decodes only the necessary paging control information during paging occasions rather than performing full decoding of all control channels in every subframe. This partial action approach reduces processing complexity and power consumption while still achieving accurate reception of critical paging information.
Data Source
AI summary
A method for efficiently transmitting and receiving a paging message and system information from and in a mobile station of a broadband wireless access system is disclosed. A method for receiving a paging message in a mobile station comprises receiving paging information from a serving base station, the paging information including paging sub group identifier (paging sub group ID) indicating a paging sub group to which the mobile station belongs; and receiving the paging message for a predetermined paging interval of the paging sub group, wherein the paging sub group is determined separately from a paging group and a geographical location determining the paging group, and is maintained while the mobile station is being operated in an idle mode.