Sidelink Resource Block Sets for Bandwidth Compliance
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Solution Overview
Problem
Current sidelink communication systems in unlicensed bands face challenges in ensuring that the occupied frequency bandwidth is greater than X% of the channel bandwidth and meeting transmission power requirements, due to the limited design of Physical Sidelink Control Channel (PSCCH) and Physical Sidelink Shared Channel (PSSCH) which cannot guarantee compliance with regulatory standards.
Innovation Solution
The method involves receiving or sending Sidelink Control Information (SCI) that includes a field to determine Resource Block (RB) sets for sidelink transmission resources, allowing for the configuration of RB sets to occupy multiple discontinuous resource blocks in the frequency domain, thereby ensuring the bandwidth and power requirements are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PSCCH and PSSCH occupy only multiple consecutive PRBs in the frequency domain, then the channel structure is simple, but the occupied frequency bandwidth cannot ensure greater than X% of the channel bandwidth
Solution Approach 1:
The patent divides the frequency resources into multiple Resource Block (RB) sets instead of using a single consecutive PRB allocation. Each RB set contains multiple RBs, and the terminal can be configured to occupy multiple RB sets that are not necessarily consecutive in frequency, thereby achieving greater total bandwidth occupation while maintaining manageable channel structure
Solution Approach 2:
The patent introduces a new dimension of resource organization by defining RB sets as a higher-level abstraction above individual RBs. This allows bandwidth allocation to be specified in terms of RB set quantities and configurations rather than individual PRB counts, enabling more flexible and granular control over the occupied frequency bandwidth
2Device complexity
If PSCCH and PSSCH occupy only multiple consecutive PRBs in the frequency domain, then the resource allocation is simple, but the transmission power requirements cannot be met
Solution Approach 1:
The patent segments the transmission resources into multiple RB sets, each of which can be independently configured and allocated. This segmentation allows the system to distribute transmission power across multiple discrete resource units, enabling better control over power spectral density and compliance with per-MHz power limits while achieving higher total transmission power through bandwidth expansion
Solution Approach 2:
The patent changes the allocation parameters from simple consecutive PRB counts to RB set configurations, including RB set indices, quantities, and frequency domain positions. This parameter transformation enables more precise control over both the spectral distribution and power allocation, allowing the system to meet transmission power requirements by optimizing the combination of RB set parameters
3Area of moving object
If terminal devices use discontinuous RB sets for transmission, then the bandwidth occupation can exceed X% of channel bandwidth, but the resource indication complexity increases
Solution Approach 1:
The patent creates a universal RB set configuration framework that can represent both consecutive and discontinuous resource allocations through a unified parameter structure. The RB set indication mechanism serves multiple functions: it specifies frequency positions, determines allocation patterns, and enables both dense and sparse allocations, thereby managing indication complexity while supporting diverse bandwidth occupation patterns
Solution Approach 2:
The patent transforms the resource indication approach by introducing RB set-level parameters (such as RB set indices, quantities, and frequency domain start positions) that aggregate multiple individual RB specifications. This parameter aggregation reduces the total number of indication elements needed while enabling more complex discontinuous patterns, as the system indicates RB sets rather than individual RBs
Data Source
AI summary
A method for wireless communication, a first terminal device, and a second terminal device are provided. The method includes that the first terminal device receives first Sidelink Control Information (SCI). Herein, the first SCI includes a first information field configured to determine Resource Block (RB) set(s) included in each of at least one sidelink (SL) transmission resource.