MAC Layer Timer Logic for IIoT Transmission Reliability
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Solution Overview
Problem
In Industrial Internet of Things (IIoT) services, there is no clear solution to ensure that the lower layer improves data transmission reliability as soon as possible after the service layer enters a survival time, leading to potential communication failures.
Innovation Solution
A method involving a terminal and network device that uses timers and counters to manage data transmission on logical channels with survival time requirements, triggering notification and processing actions when timers expire or counters reach preset values, including activating data replication functions, repetitive transmissions, and adjusting Modulation and Coding Scheme levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no specific solution is implemented at the lower layer, then the system structure remains simple, but data transmission reliability cannot be improved after service layer enters survival time
Solution Approach 1:
The patent implements preliminary action by starting first timers or first counters when data packets are received at the MAC layer, before transmission failures occur. When these timers expire or counters reach preset values, second timers are triggered to activate reliability improvement measures. This proactive timing mechanism ensures that reliability measures are activated exactly when needed (after X transmission failures) without requiring complex real-time monitoring of transmission success/failure states.
2Reliability
If transmission processing is continuously performed on the first logical channel, then communication reliability is ensured, but system resources are consumed continuously
Solution Approach 1:
The patent implements periodic action through the use of second timers that are triggered periodically when first timers expire or first counters reach preset values. The second timers control the activation and deactivation of transmission processing on the first logical channel, creating a periodic on-off pattern rather than continuous operation. This allows the system to maintain reliability during critical periods while conserving energy during normal operation periods.
Data Source
AI summary
A method of processing transmission, a terminal and a network device are provided. The method of processing transmission applied to a terminal includes: when a MAC layer of the terminal receives a data packet from a first logical channel and data packets from the first logical channel correspond to K first processes, starting a first timer or a first counter for each first process, where k≥1; triggering starting of a second timer when the first timer expires or the first counter reaches a first preset value; performing a target operation when at least one second timer is running, wherein the target operation includes one of following: sending first notification information to a network device, where the first notification information is used to instruct the network device to perform transmission processing on the first logical channel; or performing the transmission processing on the first logical channel.