Autonomous Transmission Handling in 5G UE for Resource Collision
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Solution Overview
Problem
Current communication protocols in 5G Industrial Internet of Things (IIoT) systems face data loss due to resource collisions, particularly in scenarios involving Dynamic Grant (DG) and Configured Grant (CG), where de-prioritized MAC PDUs are not transmitted, leading to increased complexity in handling resource collisions and retransmissions.
Innovation Solution
A method and apparatus for processing autonomous transmission in User Equipment (UE) that allows UE to report capability information, receive configuration information for autonomous transmission, and perform autonomous transmission based on received instructions, thereby enabling efficient handling of resource collisions and reducing implementation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous transmission is configured to ensure reliable data transmission in resource collision scenarios, then data loss is reduced, but the complexity of handling coexistence between autonomous transmission and scheduled retransmission increases
Solution Approach 1:
The patent introduces dynamic state management for HARQ processes, where the UE can switch between autonomous transmission mode and scheduled retransmission mode based on network indications. The network can dynamically activate or deactivate autonomous transmission for specific HARQ processes, allowing the system to adapt its behavior based on current transmission needs and collision scenarios.
Solution Approach 2:
The patent implements feedback mechanisms where the network device sends indications to the UE about whether to perform autonomous transmission or expect scheduled retransmission. This feedback loop allows the network to control the UE's transmission behavior, reducing the complexity of autonomous decision-making at the UE side while maintaining reliability.
2Reliability
If the network schedules retransmission for de-prioritized MAC PDU to ensure data integrity, then data loss is prevented, but the network cannot determine whether the UE has already packetized de-prioritized MAC PDU
Solution Approach 1:
The patent uses HARQ process state feedback where the network can determine the packetization status by checking whether a HARQ process is in an autonomous transmission state or waiting for scheduled retransmission. The network receives feedback about the UE's transmission state, eliminating uncertainty about whether de-prioritized MAC PDUs have been packetized.
Solution Approach 2:
The patent introduces an intermediary indication mechanism where the network sends activation/deactivation indications for autonomous transmission. This intermediary control allows the network to coordinate between the UE's packetization actions and its own retransmission scheduling decisions, ensuring both parties have consistent information about the transmission state.
3Productivity
If the UE autonomously determines transmission priority in resource collision scenarios, then transmission efficiency is improved, but the standardization work and implementation complexity increase
Solution Approach 1:
The patent implements dynamic mode switching where the UE can operate in autonomous transmission mode or scheduled retransmission mode based on network indications. This dynamic approach allows the UE to efficiently handle resource collisions when autonomous mode is activated, while falling back to network-controlled scheduled retransmission when complexity needs to be reduced, thus balancing efficiency and implementation complexity.
Data Source
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AI summary
A method for processing autonomous transmission of a User Equipment (UE), and a corresponding apparatus are provided. In the method, the UE receives first information transmitted by a network device. The first information includes autonomous transmission information, or information indicating activation or configuration of the autonomous transmission. The UE determines whether the autonomous transmission is configured or activated based on the first information. If it is determined from the first information that the autonomous transmission is configured or activated, the autonomous transmission is performed based on the first information. With the method, the autonomous transmission can be controlled based on the first information transmitted by a network, such that the implementation complexity of the UE can be reduced when the autonomous transmission of the UE and a network scheduled retransmission coexist, and the process is simple and clear, thereby reducing complexity of the UE and standardization work.