RRC Layer Access Control for PDU Session Activation
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data transmission requirements in wireless communication systems pose challenges in efficiently managing limited radio resources, particularly in new radio access technologies, where efficient data and control information transmission and network access control are necessary.
Innovation Solution
A method and apparatus for controlling access to a network by performing an access control check for protocol data unit (PDU) sessions using a radio access control (RRC) layer, where the non-access stratum (NAS) layer provides access categories and requests service activation only when the RRC layer allows access, ensuring efficient uplink/downlink signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of user equipments (UEs) and data transmission requirements increase in wireless communication systems, then communication capacity and data throughput increase, but efficient management of limited radio resources becomes more difficult
Solution Approach 1:
The patent segments the access control process into distinct layers: the RRC layer performs access control checks and determines whether access attempts are allowed, while the NAS layer provides access categories and requests service activation. This segmentation allows each layer to handle specific functions independently, improving resource management efficiency despite increasing numbers of UEs and data transmission requirements.
2Reliability
If access control checks are performed for each PDU session activation request, then network access control is improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent implements preliminary action by having the RRC layer perform access control checks before the NAS layer initiates service activation. The RRC layer determines in advance whether access attempts are allowed based on current network conditions and UE state. This preliminary check prevents unnecessary service activation requests from being processed, thereby reducing overall signaling overhead and processing time while maintaining reliable access control.
3Productivity
If multiple PDU sessions are activated simultaneously to increase data transmission capacity, then communication capacity increases, but control information management becomes more complex
Solution Approach 1:
The patent introduces a dimensional separation between the RRC layer (access control dimension) and the NAS layer (service activation dimension). The RRC layer operates in the access control dimension, making decisions about whether access attempts are allowed. The NAS layer operates in the service activation dimension, requesting service activation when access is permitted. This dimensional separation allows multiple PDU sessions to be managed efficiently by distributing control information handling across different functional dimensions, reducing overall system complexity.
Data Source
AI summary
In a wireless communication system of the present disclosure, when activation of a protocol data unit (PDU) session of a user equipment (UE) is needed, the UE performs an access control check to determine whether an access attempt for the PDU session is allowed. If the access attempt is allowed, the UE transmits a service request for the PDU session. The access control check for the PDU session is performed even if the UE is in a connected state.