Side Link Transmission on Unlicensed Bands Using FDM
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Side Link (SL) transmission technologies are primarily designed for licensed bands and struggle to meet the Occupied Channel Bandwidth (OCB) requirements when operating on unlicensed bands, particularly for services like Extended Reality (XR) and Virtual Reality (VR), which necessitate efficient resource utilization and synchronization signal transmission.
Innovation Solution
The method involves a terminal sensing and transmitting SL information in frequency division multiplexing (FDM) on unlicensed or shared bands, ensuring that the transmission meets specific conditions such as occupying a preset percentage of the nominal channel bandwidth, thereby meeting the OCB requirement through the use of techniques like frequency domain multiplexing and interlacing of synchronization signals and broadcast channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SL transmission is performed on unlicensed band using current licensed band framework, then service requirements for XR and VR can be met, but Occupied Channel Bandwidth (OCB) requirements cannot be satisfied
Solution Approach 1:
The patent changes the transmission parameters by configuring multiple SL transmissions with different frequency offsets and bandwidths. The network device configures first SL transmission with first frequency offset and first bandwidth, and second SL transmission with second frequency offset and second bandwidth, allowing the terminal to adjust transmission parameters to meet OCB requirements while supporting XR and VR services
Solution Approach 2:
The patent segments the SL transmission into multiple separate transmissions instead of using a single transmission. The terminal performs first SL transmission and second SL transmission separately with different frequency and bandwidth configurations, allowing each segment to be optimized to collectively satisfy the OCB requirement
2Productivity
If multiple SL information pieces are transmitted in FDM, then resource utilization efficiency is improved, but transmission complexity increases
Solution Approach 1:
The patent uses Frequency Division Multiplexing (FDM) as a universal multiplexing technique to transmit multiple SL information pieces simultaneously on different frequency resources. The network device configures multiple transmissions with different frequency offsets and bandwidths, allowing the system to efficiently utilize available spectrum resources while maintaining a standardized FDM approach that manages complexity
Data Source
AI summary
This application discloses an information transmission and indication method and a communications device. The method includes: sensing, by a terminal, a resource of first information on an unlicensed band or a shared band, or performing a transmission of first information, where the first information includes at least one of the following: N1 pieces of first SL information in frequency division multiplexing (FDM), where N1>1; N pieces of first information in FDM, where the N pieces of first information include N2 pieces of first SL information and N-N2 pieces of second information, N>1, and N2≥1; first SL information based on a first parameter; or first SL information within a first preset time, where at least one first transmission exists within the first preset time, and the first SL information includes a synchronization signal, a broadcast channel, or a synchronization signal block.