Two-Stage Control Signaling for Slot-Aggregated Transport Blocks
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing transport blocks in slot aggregation due to varying scheduling parameters across multiple transport blocks, leading to increased control overhead and inefficiencies.
Innovation Solution
A transmitting UE transmits a first-stage SCI message indicating a common set of scheduling parameters for multiple transport blocks, followed by one or more second-stage SCI messages providing additional specific scheduling parameters for each block, along with reservation information for the slot aggregated packet, reducing control overhead and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate control signaling is transmitted for each transport block in slot aggregation, then scheduling flexibility is improved, but control overhead increases
Solution Approach 1:
The control signaling is segmented into two stages: first-stage SCI messages containing common scheduling parameters applicable to all transport blocks, and second-stage SCI messages containing transport block-specific parameters. This segmentation allows flexible scheduling while reducing overall control overhead by avoiding repetition of common parameters.
Solution Approach 2:
Common scheduling parameters across multiple transport blocks are merged into a single first-stage SCI message. This combining approach eliminates redundant signaling and reduces control overhead while maintaining the ability to differentiate individual transport block parameters through separate second-stage messages.
2Quantity of substance
If common control signaling is transmitted for all transport blocks, then control overhead is reduced, but scheduling precision deteriorates
Solution Approach 1:
The control signaling structure is segmented into two distinct stages with different levels of granularity. The first stage handles common parameters at a coarse level, while the second stage provides fine-grained specific parameters for each transport block, achieving both overhead reduction and scheduling precision.
Solution Approach 2:
Different parts of the control signaling have different levels of detail: first-stage messages contain general parameters applicable to all blocks, while second-stage messages contain localized specific parameters for individual blocks. This local quality differentiation ensures precision where needed while minimizing overall overhead.
3Manufacturing precision
If multiple SCI messages are transmitted for slot aggregation, then resource allocation accuracy is improved, but processing complexity increases
Solution Approach 1:
The resource allocation information is segmented across two stages, with the first stage providing common resource allocation parameters and the second stage providing block-specific parameters. This segmentation improves allocation accuracy by allowing differentiated resource assignment while managing complexity through a structured two-stage approach.
Solution Approach 2:
Common resource allocation parameters are determined and signaled in advance in the first-stage SCI messages before individual transport block parameters are specified. This preliminary action simplifies processing by establishing the framework first, then filling in specific details.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A transmitted sidelink packet may span multiple slots and may include multiple transport blocks. A transmitting user equipment (UE), may indicate to the receiving UE via control resources (e.g., a sidelink control information (SCI) message) within the first slot of the multiple slots scheduling parameters common to the multiple transport blocks. The transmitting UE may indicate, to the receiving UE, additional scheduling parameters for the multiple transport blocks via at least one additional SCI message. The transmitting UE may indicate, to the receiving UE, a reservation of multiple slots for a slot aggregated packet via an SCI message. The transmitting UE may indicate, to the receiving UE, reservation information for the transport blocks of the slot aggregated packet (e.g., a time domain resource allocation and/or a frequency domain resource allocation).