Retransmission Control Information Segmentation for Wireless Decoding
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Solution Overview
Problem
In wireless communication systems, retransmissions often fail due to loss of initial control information, leading to unsuccessful decoding at the receiver, which results in inefficient resource utilization and increased errors.
Innovation Solution
The system implements a method where retransmissions include a subset of control information, allowing the receiver to decode the transmission by providing additional control information or discontinuing retransmissions based on feedback from the user equipment (UE), and using flexible scheduling for retransmissions with different modulation and resource allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If retransmissions include only a subset of control information, then resource utilization is improved, but decoding reliability deteriorates when initial control information is lost
Solution Approach 1:
The control information is segmented into two parts: essential control information included in every retransmission and supplementary control information included only in the initial transmission. This segmentation allows retransmissions to be decoded independently without requiring the initial control information, resolving the contradiction between resource efficiency and decoding reliability.
2Reliability
If complete control information is retransmitted, then decoding reliability is improved, but resource utilization deteriorates
Solution Approach 1:
The essential control information needed for decoding is extracted and included in every retransmission, while supplementary control information is taken out and included only in the initial transmission. This extraction approach ensures that retransmissions can be decoded reliably without wasting resources by repeating all control information.
3Adaptability or versatility
If the receiver requests additional control information, then decoding capability is improved, but communication overhead increases
Solution Approach 1:
The transmitter proactively includes essential control information in every retransmission before the receiver needs to request it. This preliminary action ensures that the receiver has all necessary information to decode retransmissions immediately, eliminating the need for additional request-overhead communication.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described that provide for transport block size (TBS) determination for one or more wireless retransmissions of an initial transmission, in which the initial transmission may not be successfully received at a receiver. The receiver may determine, based on control information received in a retransmission, that the associated initial transmission was lost, and that the retransmission is not able to be decoded at the receiver. The receiver, in such cases, may provide a negative acknowledgment of the retransmission and an indication to the transmitter that the initial transmission was lost. The transmitter, responsive to the indication that the initial transmission was lost, may discontinue retransmitting the transmission, or may transmit additional control information for use in decoding the one or more retransmissions.