Base Station Capability Indication for UE Access Control
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Solution Overview
Problem
In existing communications systems, user equipment (UE) cannot determine whether a base station supports low-complexity or coverage enhancement, leading to unnecessary power consumption as UE attempts to access base stations that do not support its capabilities.
Innovation Solution
A method where a base station sends a first information block to UE, indicating its capabilities, such as support for specific UE types and coverage enhancements, allowing UE to access only when its requirements match the base station's capabilities, using bits in system information blocks to convey this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE attempts to access base station without knowing base station capability, then UE can potentially access any base station, but UE power is wasted on futile access attempts to base stations that do not support low-complexity UE or coverage enhancement
Solution Approach 1:
The base station performs preliminary action by broadcasting capability indication information before UE access attempts. This information is included in system information blocks (SIB), allowing UE to know in advance whether the base station supports low-complexity UE or coverage enhancement, preventing futile access attempts and reducing UE power consumption
Solution Approach 2:
The capability indication information acts as an intermediary between the base station and UE. This information carrier conveys the base station's capability status to UE, enabling UE to make informed access decisions without directly querying the base station, thus reducing power consumption while maintaining access flexibility
2Loss of information
If base station broadcasts detailed capability information to all UE, then all UE can make informed access decisions, but system information overhead increases
Solution Approach 1:
The patent extracts only the essential capability indication information from the base station's full capability set. Instead of broadcasting all base station capabilities, only the relevant bits indicating support for low-complexity UE and coverage enhancement are included in the system information blocks, reducing information overhead while ensuring necessary information availability
Solution Approach 2:
The capability indication information is provided with different levels of detail based on UE type and access requirements. The information structure allows for localized quality adjustment where only relevant capability bits are transmitted for specific UE categories, optimizing the balance between information completeness and overhead reduction
Data Source
AI summary
Embodiments of the present invention provide a method for indicating a base station capability and an apparatus and relate to the communications field, so as to indicate whether a base station supports UE of a first type or a capability of coverage enhancement, so that the UE accesses the base station only when the requirement of the UE conforms to the capability supported by the base station. The method includes sending, by the base station, a first information block to user equipment UE, where the first information block carries first information, and the first information is used to indicate a capability of the base station.