RLC Layer Timer for URLLC Data Transmission Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In ultra-reliable low-latency communication (URLLC) services, conventional technologies face challenges in ensuring 1-millisecond latency and 99.999% reliability, leading to potential interruptions at the application layer due to occasional communication errors, which affect data transmission reliability.
Innovation Solution
A communication method that involves a first device obtaining transmission states of data packets using a protocol layer entity, starting a timer upon detecting transmission failures, and adjusting radio resource configuration parameters to improve the success rate of subsequent data packet transmission, thereby avoiding interruptions and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional time-to-live timer is used at application layer to handle transmission failures, then application layer can detect transmission issues, but transmission reliability deteriorates due to application layer interruptions affecting normal service
Solution Approach 1:
The patent introduces a timer mechanism at the radio link control layer as an intermediary between the physical transmission layer and the application layer. This intermediary timer detects transmission failures before they reach the application layer, allowing the system to handle failures at the radio resource control layer without causing application layer interruptions, thus maintaining both reliability monitoring and service continuity
Solution Approach 2:
The patent implements preliminary action by starting a timer at the radio link control layer before transmission failures propagate to the application layer. The timer monitors transmission states and triggers radio resource configuration parameter adjustments in advance, preventing transmission failures from reaching the application layer and causing interruptions
2Reliability
If radio resource configuration parameters are adjusted frequently to improve transmission success rate, then data transmission reliability improves, but system complexity increases due to additional timer management and parameter adjustment mechanisms
Solution Approach 1:
The patent applies local quality by implementing the timer mechanism specifically at the radio link control layer rather than throughout the entire protocol stack. The timer is localized to monitor only radio link transmission states, and parameter adjustments are applied locally to affected radio resources, minimizing overall system complexity while improving transmission reliability in the critical radio interface
3Reliability
If timer is started to monitor transmission states, then transmission reliability can be monitored and improved, but transmission latency increases due to timer overhead and parameter adjustment delays
Solution Approach 1:
The patent implements partial action by configuring the timer to start only under specific conditions (when transmission failures are detected) rather than continuously monitoring all transmissions. The timer monitors a subset of transmission states (m out of n packets), providing sufficient reliability monitoring while minimizing timer overhead and associated latency
Solution Approach 2:
The patent applies dynamics by making the timer mechanism adaptive - the timer is dynamically started or stopped based on detected transmission failure patterns. When m transmission failures are detected among n packets, the timer starts to monitor and adjust parameters; when transmission succeeds, the timer stops. This dynamic behavior optimizes the balance between reliability monitoring and transmission latency
Data Source
AI summary
A communication method includes: a first device obtains transmission states of first n data packets by using a first protocol layer entity, where the first protocol layer entity includes a radio link control (RLC) layer entity or an entity above an RLC layer; the first device starts a timer if transmission states of m data packets in the first n data packets are transmission failures, where n and m are both positive integers, and m is less than or equal to n; and the first device determines a radio resource configuration parameter used to transmit a subsequent data packet, or sends a first message to a second device, where the first message is used to indicate a state of the timer, and the state of the timer is used to determine the radio resource configuration parameter used to transmit the subsequent data packet.