Random Access Information Storage in 5G UE Context
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Solution Overview
Problem
There is a need for a method and device to efficiently store and report information related to the reception strength of synchronization signal blocks (SSB) or channel state information - reference signals (CSI-RS) during random access in next-generation mobile communication systems.
Innovation Solution
A method and device that involve storing first resource information related to contention-based random access (CBRA) and second resource information related to contention-free random access (CFRA), and transmitting these to a base station in response to a request, allowing for efficient reporting of reception strength information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access information is stored in the UE context in existing LTE systems, then the network can identify UE identity and perform random access procedures, but the UE context becomes excessively large and cannot be efficiently managed in next-generation systems
Solution Approach 1:
The patent divides the random access information storage into two separate locations: the gNodeB stores random access parameters (preamble index, timing information) in the UE context, while the AMF stores only the necessary identifier (s-TMSI or 5G-GUTI) in the MS context. This segmentation reduces the size of the MS context while maintaining the ability to perform random access procedures reliably.
2Loss of information
If the network stores complete random access information in the MS context, then the UE can be identified during random access, but the signaling overhead increases and context management becomes inefficient
Solution Approach 1:
The patent extracts the essential identifier information (s-TMSI or 5G-GUTI) from the complete random access information set and stores only this extracted identifier in the MS context at the AMF. The complete random access parameters remain at the gNodeB. This extraction maintains UE identification capability while significantly reducing signaling overhead and context data quantity.
3Adaptability or versatility
If the AMF stores complete UE context including all random access parameters, then the AMF has full information for random access, but the AMF context size increases and processing efficiency decreases
Solution Approach 1:
The patent segments the UE context management by storing different types of information at different locations: the gNodeB stores random access parameters (preamble index, timing information) while the AMF stores only the identifier (s-TMSI or 5G-GUTI). This segmentation allows the AMF to maintain full processing capability for random access procedures while keeping the AMF context size manageable and processing efficient.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention discloses a method performed by a UE in a wireless communication system, the method includes storing first resource information related to a contention-based random access (CBRA) and second resource information related to a contention-free random access (CFRA); receiving, from a base station, a first message for requesting random access related information of the terminal; and transmitting, to the base station, a second message including the stored first resource information and the stored second resource information in response to the first message.