Sidelink SCI Resource Allocation for Multiple 2nd-Stage Messages
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Solution Overview
Problem
Existing sidelink communication systems face challenges in efficiently configuring resources for transmitting multiple sidelink control information (SCI) messages, particularly in 5G communication systems, which affect the performance of Vehicle-to-Everything (V2X) communications.
Innovation Solution
A method is introduced to generate and transmit 1st-stage SCI with resource allocation information for a plurality of 2nd-stage SCIs, allowing terminals to transmit and receive these SCIs in designated resource regions, using time and frequency resource information to optimize the allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple 2nd-stage SCIs are transmitted using separate resource allocation methods, then the control information for sidelink communication is complete, but the resource configuration complexity increases
Solution Approach 1:
The patent combines the resource allocation information for multiple 2nd-stage SCIs into a single 1st-stage SCI message. The 1st-stage SCI includes a resource allocation field that indicates resource regions for multiple 2nd-stage SCIs, allowing the terminal to determine resource allocations for multiple control information messages through one unified structure rather than separate allocation methods for each SCI.
Solution Approach 2:
The 1st-stage SCI is designed to serve multiple functions: it not only provides control information for the current transmission but also contains resource allocation information that enables the terminal to receive multiple subsequent 2nd-stage SCIs. This multi-functional design reduces the need for separate resource configuration mechanisms.
2Productivity
If resource allocation information is included in 1st-stage SCI for multiple 2nd-stage SCIs, then the resource utilization efficiency improves, but the size of 1st-stage SCI increases
Solution Approach 1:
The resource allocation information in the 1st-stage SCI is segmented into multiple parts, each corresponding to different 2nd-stage SCIs. The segmentation includes time resource information (start symbol index, number of symbols) and frequency resource information (start resource element index, number of resource elements) for each SCI, allowing efficient packing of allocation data without excessive overhead.
Solution Approach 2:
Instead of allocating resources sequentially or in a single dimension, the patent uses two-dimensional resource region indication in the 1st-stage SCI, covering both time and frequency domains. This dimensional approach allows multiple 2nd-stage SCIs to be allocated across different time-frequency resources efficiently, reducing the overall information overhead compared to one-dimensional allocation methods.
Data Source
AI summary
A method and apparatus for transmission and reception of sidelink control information in a communication system are disclosed. An operation method of a transmission terminal comprises the steps of: generating first stage SCI including resource allocation information of a plurality of pieces of second stage SCI; transmitting the first stage SCI to one or more reception terminals; and transmitting the plurality of pieces of second stage SCI to the one or more reception terminals in a resource area indicated by the resource allocation information. Therefore, the performance of the communication system can be improved.