Group RRC Connection Release in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in releasing multiple RRC connections, leading to signaling overhead in downlink transmissions during overload situations, as existing methods require individual RRC connection release messages for each connection.
Innovation Solution
A method for releasing connections in a wireless communication system based on group connection release information, which includes prioritized or non-prioritized causes, logical channel priorities, and probability factors, allowing UE to determine whether to release connections without receiving separate release messages for each.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual RRC connection release messages are sent for each connection, then connection release reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple individual RRC connection release messages into a single group connection release message that can release multiple connections simultaneously. The network device sends one aggregated release message containing release indications for multiple UEs or multiple connections, thereby reducing signaling overhead while maintaining the reliability of connection release through explicit release indications for each connection.
Solution Approach 2:
The group connection release message serves multiple functions: it can release multiple RRC connections simultaneously, support both individual and group release scenarios, and provide flexible release strategies (prioritized or non-prioritized causes). This multi-functional approach allows the system to handle diverse connection release scenarios with a single message type, reducing overall signaling overhead.
2Quantity of substance
If group connection release is implemented without prioritization, then signaling overhead is reduced, but connection release efficiency deteriorates during overload
Solution Approach 1:
The patent introduces prioritized cause and non-prioritized cause categories within the group connection release message, allowing different release strategies for different connections based on their importance. High-priority connections (e.g., emergency, voice services) are handled differently from low-priority connections, enabling efficient resource management during overload while maintaining overall system reliability.
Solution Approach 2:
The patent changes the release behavior based on the establishment cause parameter of each connection. By categorizing connections into prioritized and non-prioritized groups based on their establishment causes, the system dynamically adjusts which connections are released first during overload conditions, improving connection release efficiency without requiring separate messages for each connection.
3Device complexity
If all connections are released uniformly, then device complexity is reduced, but network resource management efficiency deteriorates
Solution Approach 1:
The patent introduces dynamic release strategies where the network can selectively release connections based on prioritized or non-prioritized causes. The release procedure adapts to different scenarios: during normal operation, connections may be released uniformly; during overload, prioritized connections are protected while non-prioritized connections are released first. This dynamic approach improves network resource management efficiency without significantly increasing device complexity.
Data Source
AI summary
A method and apparatus of releasing a connection in a wireless communication system is provided. A user equipment (UE) establishes a radio resource control (RRC) connection with a specific establishment cause, receiving paging indicating connection release and release information including an establishment cause or a logical channel priority, and releasing the RRC connection depending on the establishment cause or the logical channel priority included in the release information.