Sidelink Control Information for IRB Resource Indication
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Solution Overview
Problem
In the context of Vehicle to Everything (V2X) communications, there is a challenge in effectively indicating sidelink transmission resources in unlicensed spectrum scenarios, particularly when using interlaced resource blocks (IRBs), to support efficient and reliable data interaction between vehicles.
Innovation Solution
The method involves transmitting Sidelink Control Information (SCI) from one terminal to another, where the transmission resource for the Physical Sidelink Shared Channel (PSSCH) is based on IRBs, allowing for accurate indication of transmission resources using a frequency resource indicator value (FRIV) that determines the IRB index and number of IRBs, enabling resource reservation and flexible resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional resource indication methods are used in licensed spectrum, then resource allocation is simple and straightforward, but they cannot support efficient sidelink communication in unlicensed spectrum scenarios with IRBs
Solution Approach 1:
The patent changes the resource indication parameters from traditional contiguous resource block assignments to IRB-based indexing. The frequency resource indicator value (FRIV) is redefined to indicate the starting IRB index and the number of IRBs, adapting the parameter structure to suit unlicensed spectrum characteristics while maintaining efficient resource allocation
Solution Approach 2:
The patent segments the unlicensed spectrum into multiple interlaced resource blocks (IRBs) with frequency gaps to accommodate regulatory requirements. This segmentation allows the system to divide the spectrum into manageable units that can be independently allocated and indicated through modified SCI messaging
2Reliability
If IRB-based transmission resources are used in SL-U, then spectrum efficiency and regulatory compliance are improved, but accurate indication of transmission resources becomes challenging
Solution Approach 1:
The patent introduces an intermediary encoding mechanism where the frequency resource indicator value (FRIV) serves as a mediator between the resource allocation decision and the actual resource assignment. The FRIV encodes both the starting IRB index and the number of IRBs in a compact form, enabling precise resource indication through standardized SCI messaging
Solution Approach 2:
The patent adds a new dimension to resource indication by using a two-dimensional encoding approach: the FRIV indicates both the starting position (IRB index) and the resource extent (number of IRBs). This dimensional expansion allows precise specification of IRB-based resources within the limited signaling budget
3Productivity
If flexible resource allocation is implemented for IRBs, then resource utilization efficiency increases, but the complexity of resource management and indication increases
Solution Approach 1:
The patent creates a universal resource indication mechanism that works for both licensed and unlicensed spectrum scenarios. The modified FRIV encoding scheme provides multi-functionality by supporting both traditional resource block indication and IRB-based indication, enabling flexible resource allocation while maintaining a unified signaling framework
Solution Approach 2:
The patent implements dynamic resource allocation where terminals can flexibly select and indicate IRB-based transmission resources based on channel conditions and traffic requirements. The resource indication mechanism dynamically adapts to different allocation scenarios while maintaining standardized signaling through SCI messages
Data Source
AI summary
Apparatuses for indicating sidelink transmission resource are provided. The apparatus includes: a processor, a transceiver connected to the processor, and a memory for storing instructions executable by the processor. The processor is configured to load and execute the instructions to control the transceiver to transmit sidelink control information (SCI) to a second terminal. The SCI indicates a transmission resource for a physical sidelink shared channel (PSSCH), and the transmission resource for the PSSCH is based on an IRB.