Mobile Wireless Device RRC Connection State Determination
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Solution Overview
Problem
Single radio mobile wireless devices struggle to maintain simultaneous connections with multiple wireless networks, leading to connection state misalignment and data transmission interruptions due to extended interruptions in radio resource control (RRC) connections, which affects user experience and requires lengthy recovery processes.
Innovation Solution
A method where a mobile wireless device detects connection interruptions, transmits scheduling requests and random access messages to determine the RRC connection state, and executes a radio link failure procedure to re-establish or establish a new RRC connection, using unique identifiers and configured thresholds to quickly assess and recover the connection state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single radio mobile wireless device interrupts transmission to communicate with a second wireless access network, then the device can maintain connections with multiple networks, but the connection state misalignment and data transmission interruptions occur
Solution Approach 1:
The mobile wireless device determines the connection state of the first wireless access network before fully engaging with the second network. By checking whether the first network has released the RRC connection during the tune-away period and before returning to it, the device performs preliminary verification to prevent state misalignment, thus maintaining reliability while enabling multi-network adaptability
2Adaptability or versatility
If the mobile wireless device tunes away from the first wireless access network to the second wireless access network, then the device can receive paging messages from both networks, but extended interruption periods cause connection state uncertainty
Solution Approach 1:
The mobile wireless device implements a feedback mechanism by determining the connection state of the first wireless access network upon return from the tune-away period. This feedback loop checks whether the RRC connection was released during the interruption, allowing the device to quickly adjust its state and minimize recovery time, thus reducing the loss of time while maintaining the ability to receive paging messages from multiple networks
3Speed
If the device assumes the RRC connection is still active after tune-away, then connection recovery is faster, but data transmission errors occur due to state misalignment
Solution Approach 1:
Instead of immediately assuming the RRC connection is active, the device performs a preliminary determination of the connection state before resuming data transmission. This preliminary check verifies whether the first wireless access network has released the connection during the tune-away period, ensuring data transmission accuracy while maintaining relatively fast recovery by avoiding lengthy re-establishment procedures
Data Source
AI summary
Methods, apparatuses and computer readable media are described that determine a connection state between a mobile wireless device and a wireless network upon detection of an interruption of a connection between the mobile wireless device and the wireless network. The mobile wireless device transmits an uplink resource allocation message to the wireless network, and when receiving no response to the uplink resource allocation message, transmits a random access message to the wireless network. When receiving no response from the wireless network to the random access message, the mobile wireless device executes a radio link failure procedure. In an embodiment, the uplink resource allocation message includes a unique identifier for an existing radio resource control connection between the mobile wireless device and the wireless network.