Single-Slot Downlink Control for Parallel Sidelink Transmission
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Solution Overview
Problem
Current data transmission methods in user equipment cooperation scenarios result in excessive delays due to the sequential sending of scheduling information over physical downlink control channels, leading to inefficiencies in uplink transmission capabilities.
Innovation Solution
A method where a terminal apparatus receives multiple pieces of downlink control information in a single slot to determine the sequence of transport blocks for simultaneous sidelink communication with multiple terminal apparatuses, utilizing time, frequency, or space division multiplexing to reduce delays and improve transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first network apparatus sequentially sends scheduling information to multiple terminal apparatuses in different subframes, then the control information can be sent reliably, but the data transmission delay becomes excessively long
Solution Approach 1:
The patent combines multiple scheduling information transmissions into a single slot by sending multiple pieces of downlink control information simultaneously to different terminal apparatuses. This merging of control information delivery into parallel channels resolves the contradiction by eliminating sequential delays while maintaining reliable delivery through proper resource allocation and multiplexing techniques.
Solution Approach 2:
The patent transitions from time-sequential control information delivery to spatial-parallel delivery by utilizing multiple sidelink resources (different time, frequency, or space dimensions). This dimensional change allows simultaneous transmission of control information to multiple terminals, reducing overall delay while preserving reliability through diverse resource paths.
2Device complexity
If the first terminal apparatus sends data to multiple cooperation terminal apparatuses sequentially over different sidelinks, then the transmission can be managed simply, but the overall transmission efficiency decreases
Solution Approach 1:
The patent segments the transmission process by assigning different sidelink resources (time, frequency, or spatial) to different terminal apparatuses. This segmentation allows parallel transmission management where each resource handles a specific terminal, reducing overall complexity while enabling simultaneous data delivery to multiple recipients, thereby improving transmission efficiency.
3Loss of time
If multiple pieces of downlink control information are received and processed in a single slot, then the control information delivery delay is reduced, but the processing complexity increases
Solution Approach 1:
The patent resolves processing complexity by mapping multiple downlink control information pieces to distinct sidelink resources across different dimensions (time, frequency, or space). This dimensional separation allows parallel processing of control information without resource conflicts, reducing delivery delay while managing complexity through structured resource allocation and multiplexing schemes.
Data Source
AI summary
This application provides a data transmission method and an apparatus, and may be applied to fields such as user equipment cooperation, sidelink relay, user relay, and internet of vehicles. A first terminal apparatus receives at least two pieces of downlink control information from a first network apparatus in a first slot, where the at least two pieces of downlink control information include first downlink control information and second downlink control information, the first downlink control information is used to indicate a first sidelink resource used by the first terminal apparatus to send first sidelink information to a second terminal apparatus, and the second downlink control information is used to indicate a second sidelink resource used by the first terminal apparatus to send second sidelink information to a third terminal apparatus.