Relay UE Data Inactivity Timer for Remote RRC Connection Management
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Solution Overview
Problem
In a radio communication system, remote user equipment (UE) that cannot be directly connected to a network device experiences inconsistent connection states due to its inability to correctly receive data inactivity timer-related messages, leading to inconsistent RRC connection management between the UE and the network device.
Innovation Solution
A connection release method where a relay UE configures and controls a data inactivity timer for the remote UE, starting or restarting it based on data transmission, ensuring consistent RRC connection management by transmitting and receiving data inactivity timer durations to and from the remote UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device transmits RRC connection release messages directly to remote UE, then the connection release can be initiated by the network, but the remote UE cannot correctly receive these messages due to inability to maintain proper connection state, leading to inconsistent RRC connection management
Solution Approach 1:
The relay UE acts as an intermediary between the network device and remote UE. The relay UE receives RRC connection release messages from the network device and forwards them to the remote UE, enabling the remote UE to indirectly receive network messages without needing to maintain direct connection state synchronization with the network device
Solution Approach 2:
The connection management function is segmented between multiple entities: the network device maintains overall connection state, the relay UE manages local connection state and message forwarding, and the remote UE receives forwarded messages. This segmentation allows each entity to operate independently within its scope, resolving the reception capability issue
2Extent of automation
If the remote UE relies on network device messages for connection release, then centralized control is maintained, but the remote UE experiences connection state inconsistency due to message reception failures
Solution Approach 1:
The relay UE provides feedback about connection state to both the network device and remote UE. When the relay UE determines that connection release is needed, it notifies both parties, ensuring they maintain consistent connection state information without requiring the remote UE to directly receive and process all network messages
Solution Approach 2:
The relay UE proactively determines when connection release is needed based on local observations and initiates the release process by notifying the network device and remote UE in advance, preventing connection state inconsistency before it occurs
Data Source
AI summary
A connection release method includes: in response to detecting a first data transmission of a remote user equipment (UE), determining a data inactivity timer corresponding to the remote UE, and controlling the data inactivity timer to start timing, the data inactivity timer being used for controlling the RRC connection of the remote UE.