Wireless Retransmission Control via Time Thresholds
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Solution Overview
Problem
Current wireless communication systems face challenges in managing retransmissions for delay-sensitive services, leading to inefficient use of radio resources and increased UE power consumption, particularly in scenarios like XR and CG where packet delay budgets are stringent.
Innovation Solution
A method is introduced where a first node receives a data unit and signaling indicating a reserved time-domain resource for retransmission, with control information being transmitted based on a time threshold to indicate whether to drop or continue retransmissions, thereby optimizing resource utilization and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retransmission is continued using reserved time-domain resources beyond the packet's effective time, then reliability of data transmission is improved, but radio resource utilization deteriorates and UE power consumption increases
Solution Approach 1:
The patent applies preliminary action by determining in advance whether to drop retransmission based on comparing the time domain resource position against the packet effective time threshold. This proactive decision prevents wasteful retransmissions before they occur, reducing UE power consumption while maintaining reliability for packets that can still be effectively transmitted.
Solution Approach 2:
The patent implements dynamics by making the retransmission decision adaptive rather than static. The system dynamically evaluates whether to continue or drop retransmission based on the relationship between the scheduled time-domain resource and the packet's effective time, allowing flexible optimization of both reliability and energy consumption based on real-time conditions.
2Reliability
If retransmission is continued using reserved time-domain resources beyond the packet's effective time, then reliability of data transmission is improved, but radio resource utilization deteriorates
Solution Approach 1:
The system performs preliminary evaluation by comparing the time-domain resource position with the packet effective time threshold before committing to retransmission. This advance decision prevents reservation of radio resources for packets that have already exceeded their effective transmission window, thereby improving overall radio resource utilization while preserving reliability for valid packets.
Solution Approach 2:
The patent applies dynamics by making retransmission decisions adaptive based on the temporal relationship between scheduled resources and packet validity. The system dynamically adjusts resource allocation decisions, releasing resources for packets beyond their effective time while maintaining retransmission for valid packets, thus optimizing both reliability and resource productivity.
3Productivity
If transmission resources are released early for other data transmissions, then radio resource utilization is improved, but data transmission reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by evaluating the time-domain resource position against the packet effective time threshold before releasing resources. This ensures that resources are only released for packets that have truly exceeded their effective transmission window, preventing premature resource release that would compromise reliability, while enabling timely release to improve resource utilization.
Solution Approach 2:
The system implements dynamics by making resource release decisions adaptive based on packet validity assessment. The decision to release or retain resources is dynamically determined by comparing the scheduled transmission time with the packet's effective time, ensuring reliability is maintained for valid packets while enabling resource reallocation for improved productivity when appropriate.
Data Source
AI summary
The present application provides a method and device for wireless communications. A first node receives a first data unit at a MAC sublayer; receives a first signaling, the first signaling indicates a first time-domain resource, the first time-domain resource is reserved for retransmission of a first MAC PDU, the first MAC PDU comprises the first data unit; wherein a first time length is a length of a time interval between a reception of the first data unit and the first time-domain resource, whether to transmit first control information depends on a size relation between the first time length and a first time threshold; the first control information is used to indicate dropping retransmission of the first MAC PDU. The present application can effectively improve radio efficiency, reduce transmission delay, and reduce power consumption of the UE.