Capability Identifier Distribution in 5G NAS and RRC Signaling
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Solution Overview
Problem
The increasing capability information of terminal devices in 5G technology leads to significant signaling overhead and storage burdens for core networks, necessitating an efficient method to allocate capability identifiers and reduce reporting and storage requirements.
Innovation Solution
The method involves allocating capability identifiers to terminal devices through Non-Access Stratum (NAS) or Radio Resource Control (RRC) processes, allowing network devices to effectively manage and associate capability information, thereby reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminal devices report detailed capability information, then the network can accurately identify device capabilities, but signaling overhead and storage burden increase significantly
Solution Approach 1:
The patent creates a simplified copy (capability identifier) that represents the full capability information. Instead of transmitting the complete capability information, the system transmits this identifier which can be mapped to the detailed capability data stored in the network, significantly reducing signaling overhead while maintaining accurate capability identification.
Solution Approach 2:
The patent extracts the essential identifying feature from the complete capability information to create a capability identifier. This extracted identifier contains just enough information to uniquely identify device capabilities, separating the identification function from the detailed capability data storage, thereby reducing the amount of data that needs to be transmitted.
2Measurement precision
If terminal devices report detailed capability information, then the network can accurately identify device capabilities, but storage burden on core network increases
Solution Approach 1:
The network maintains a mapping table that stores the relationship between capability identifiers and detailed capability information. This allows the network to store detailed capability data centrally while only transmitting compact identifiers to terminal devices, reducing both storage burden on distributed devices and signaling overhead.
Solution Approach 2:
The patent transitions from storing and transmitting full capability information in the traditional dimension to using a compressed identifier dimension with a mapping relationship. This dimensional transformation allows efficient storage and retrieval of capability data without burdening the signaling interface or terminal device storage.
3Ease of operation
If capability identifiers are allocated through NAS process, then core network can manage capability identification, but allocation complexity increases
Solution Approach 1:
The patent enables the NAS signaling infrastructure to serve dual purposes: both traditional network management functions and capability identifier allocation. By reusing existing NAS message structures and procedures, the system avoids creating separate complex allocation mechanisms while still achieving effective capability identifier management.
4Ease of operation
If capability identifiers are allocated through RRC process, then access network can manage capability identification, but signaling overhead increases
Solution Approach 1:
The patent combines capability identifier allocation with existing RRC signaling procedures, merging multiple functions into unified message exchanges. This integration allows the access network to allocate capability identifiers using existing RRC infrastructure without requiring separate dedicated signaling processes, thereby avoiding additional signaling overhead.
Data Source
AI summary
Disclosed in the present application is a capability identifier distribution method, capable of effectively distributing a capability identifier for a terminal device, decreasing signaling overhead caused by capability information reporting and storage. The method comprises: a terminal device, in a non-access stratum (NAS) process, acquiring a capability identifier of a network device for distribution to the terminal device; or, the terminal device, in a radio resource control (RRC) process, acquiring said capability identifier; the capability identifier being used to identify capability information of the terminal device.