System Information Area ID Indexing for Wireless UE Power Reduction
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Solution Overview
Problem
In next-generation wireless communication systems, user equipment (UE) consumes excessive energy in acquiring system information, especially when switching between cells, as existing methods require re-acquisition of identical system information, leading to inefficiencies in energy usage.
Innovation Solution
The method involves broadcasting an index or area ID by the network to indicate universal system information across multiple cells, allowing UE to determine if stored system information is valid without re-acquiring it, thereby reducing energy consumption by avoiding unnecessary data retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE re-acquires system information when switching cells, then system information validity is ensured, but energy consumption increases
Solution Approach 1:
The network side performs preliminary action by broadcasting area ID and system information in advance before the UE needs to verify or re-acquire it. When the UE switches cells, it can directly use the pre-broadcast area ID to determine whether system information is valid without immediate re-acquisition, thus reducing energy consumption while ensuring validity.
Solution Approach 2:
The area ID acts as an intermediary between the network side and UE. Instead of directly comparing system information content, the UE uses the area ID as a mediator to quickly determine system information validity. This intermediary mechanism simplifies the verification process and reduces the energy required for system information management.
2Measurement precision
If UE checks value tag to verify system information, then system information accuracy is ensured, but acquisition time increases
Solution Approach 1:
The patent extracts the area ID from the complete system information and broadcasts it separately. The UE only needs to check this extracted area ID to determine system information validity, rather than verifying the entire system information content. This extraction approach maintains accuracy verification while significantly reducing the time required.
3Use of energy by moving object
If network broadcasts area ID for system information indication, then energy efficiency is improved, but system information complexity increases
Solution Approach 1:
The patent segments system information management into two independent parts: area ID broadcasting and system information content. The area ID is broadcast separately to indicate system information validity, while the actual system information content remains unchanged. This segmentation reduces energy consumption without significantly increasing overall system complexity, as the area ID mechanism is added as a separate layer.
Data Source
AI summary
A system information indication method and apparatus and a communication system. In the embodiments of this disclosure, by indicating a correspondence between an area related ID or a system information related index and system information, and/or notifying information on a change of the area related ID or system information related index, a case may be avoided where a UE needs still to obtain system information from a network side when system information of a current cell is stored, thereby efficiently lowering power consumption of the UE in acquiring the system information.