Wireless Device Retransmission Procedure Selection
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Solution Overview
Problem
Existing methods for data transmission in wireless communications networks incur long connectivity interruptions, higher power consumption, and increased signaling overhead, particularly in scenarios where acknowledgments are not promptly received.
Innovation Solution
A method where a wireless device, after transmitting initial data in a specific subset of uplink time-frequency resources, selects a procedure for retransmission based on configured criteria, such as timer status, data priority, and buffer status, without waiting for acknowledgment from the network node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device waits for acknowledgment from the network node before retransmission, then the reliability of data transmission is improved, but the latency and connectivity interruption time increase
Solution Approach 1:
The wireless device performs preliminary actions by selecting and preparing retransmission procedures in advance based on configured criteria (timer status, data priority, buffer status) before acknowledgment is received. This allows the device to proactively prepare for retransmission without waiting for network confirmation, thereby reducing connectivity interruption time while maintaining reliability through pre-planned fallback mechanisms.
2Productivity
If the wireless device performs frequent retransmissions without acknowledgment, then the productivity of data transmission is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts retransmission behavior based on real-time conditions including timer status, data priority levels, and buffer status. The wireless device adapts its retransmission strategy by selecting appropriate procedures (HARQ retransmission, initial transmission with updated MAC PDU, or random access) based on current system state, thereby optimizing productivity while minimizing unnecessary power consumption through condition-based decision making.
3Adaptability or versatility
If the wireless device uses detailed retransmission procedures with multiple options, then the adaptability of the transmission system is improved, but the device complexity increases
Solution Approach 1:
The system manages adaptability through parameter changes rather than complex procedural logic. By monitoring changes in timer status, data priority, and buffer status parameters, the wireless device automatically selects appropriate retransmission procedures. This parameter-driven approach provides versatile adaptability across different transmission scenarios while keeping the control logic relatively simple and rule-based, avoiding the need for complex decision trees or state machines.
Data Source
AI summary
A method performed by a wireless device (130). The wireless device (130), after a first transmission of first data in a first subset of a set of periodic uplink time-frequency resources to a network node (110), and in the absence of having received an acknowledgement that the first data has been received, selects (204) a procedure for sending (205) a second transmission from: i) a HARQ retransmission, ii) an initial transmission comprising a same message to resume communications, iii) the initial transmission comprising the same message to resume communications and at least one of: a MAC PDU, an updated MAC PDU, an updated report on the status of the buffer, and an updated report on the power, and iv) an RA or RA-SDT for the transmission of the data. The wireless device (130) also sends (203) the second transmission to the network node (110) in a second subset of the set.