RRC Connection Status Detection via Explicit Feedback
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Solution Overview
Problem
In wireless communication systems, the RRC layer may not know the exact status of an RRC connection between a base station and a mobile terminal due to the lack of explicit acknowledgement mechanisms for RRC messages, leading to inefficient resource management and potential communication failures.
Innovation Solution
The base station transmits a second message with instructions for the mobile terminal to respond, allowing the base station to determine the status of the RRC connection based on the presence or absence of a response, thereby actively managing the connection establishment, modification, or release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station relies on lower layer retransmission mechanisms (ARQ, HARQ) to monitor RRC message transmission, then the existing protocol structure is maintained, but the RRC layer cannot know the exact status of RRC connection
Solution Approach 1:
The patent introduces a feedback mechanism where the mobile terminal sends an explicit confirmation message to the base station after successfully receiving and processing an RRC message. This feedback loop enables the base station to accurately determine the status of RRC connection (established, modified, or released) by detecting the presence or absence of the confirmation message, thereby resolving the uncertainty in RRC connection status detection.
2Productivity
If the base station does not have explicit acknowledgement mechanisms for RRC messages, then the protocol remains simpler, but resource management becomes inefficient and communication failures may occur
Solution Approach 1:
The confirmation message mechanism provides feedback to the base station about the successful reception and processing of RRC messages by the mobile terminal. This enables the base station to efficiently manage radio resources by knowing the exact status of RRC connection, avoiding unnecessary retransmissions and optimizing resource allocation, thereby improving productivity without excessive complexity.
3Reliability
If the base station waits for explicit confirmation of RRC message reception, then connection status is accurately determined, but the connection establishment time increases
Solution Approach 1:
The base station can determine the status of RRC connection by detecting the absence of a confirmation message within a predetermined time period after transmitting an RRC message. This preliminary detection mechanism allows the base station to infer the connection status without waiting indefinitely for explicit confirmation, thereby reducing the time loss while maintaining reliable status detection.
Data Source
AI summary
Techniques are provided to determine the status of a radio resource control (RRC) connection between a base station and a mobile terminal in a wireless communication system. According to some aspects, a base station transmits a first message to the mobile terminal, the first message comprising instructions which, upon being executed by the mobile terminal, would cause the establishment, the modification, or the release of the RRC connection between the mobile terminal and the base station. The base station subsequently transmits a second message to the mobile terminal, the second message comprising instructions which, upon being executed by the mobile terminal, would force the mobile terminal to transmit a response to the base station. The base station then determines the status of the RRC connection between the mobile terminal and the base station based, at least in part, on the presence or absence of the response from the mobile terminal.