Sidelink Bandwidth Part Switching for Power and Interference
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Solution Overview
Problem
Current sidelink communication technologies face challenges in power savings and interference management due to the use of a single bandwidth part (BWP) for sidelink communication, which constrains the ability to provide power savings through communication over narrower bandwidths and may lead to interference among devices.
Innovation Solution
The configuration of multiple BWPs in a sidelink carrier, each including one or more resource pools, allows for hybrid automatic repeat request (HARQ) feedback, retransmission, resource allocation, and resource reservation, enabling a sidelink device to switch between BWPs and suspend, release, or continue using reserved resources based on the switch for improved power management and interference coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single bandwidth part (BWP) is used for sidelink communication, then resource allocation is simplified, but power savings are limited and interference management becomes difficult
Solution Approach 1:
The patent divides the sidelink carrier into multiple bandwidth parts (BWPs), each with its own resource pools for transmission and reception. This segmentation allows the device to switch between different bandwidth portions based on traffic requirements, enabling narrower bandwidth operation for power savings while maintaining the ability to expand to wider bandwidths when needed.
Solution Approach 2:
The patent implements dynamic BWP switching mechanisms where the device can transition between different bandwidth parts based on real-time communication needs. The configuration includes multiple BWPs with different bandwidth characteristics, and the device dynamically selects appropriate BWPs and their associated resource pools to optimize power consumption while maintaining communication performance.
2Object-affected harmful factors
If multiple bandwidth parts are configured for sidelink communication, then power savings and interference coordination improve, but device complexity and resource management overhead increase
Solution Approach 1:
The patent segments the frequency spectrum into multiple BWPs, each with dedicated resource pools for transmission and reception. This segmentation isolates different communication activities into separate bandwidth portions, reducing interference between simultaneous transmissions and receptions while enabling targeted resource management for each BWP.
Solution Approach 2:
The patent applies different resource pool configurations to different BWPs based on local requirements. Each BWP can have its own transmission resource pool, reception resource pool, and associated parameters optimized for specific communication scenarios, allowing localized interference management and resource allocation strategies.
3Adaptability or versatility
If bandwidth part switching is implemented, then communication flexibility and power efficiency improve, but resource allocation complexity and switching overhead increase
Solution Approach 1:
The patent implements dynamic BWP switching with associated resource pool reconfiguration. The device can switch between pre-configured BWPs and their corresponding resource pools based on communication conditions, providing adaptability for different traffic types and channel conditions while using predefined configurations to manage switching overhead.
Solution Approach 2:
The patent uses pre-configuration of multiple BWPs and their associated resource pools before actual communication occurs. This preliminary setup includes defining transmission resource pools, reception resource pools, and parameters for each BWP, which reduces the complexity of real-time resource allocation during BWP switching operations.
Data Source
AI summary
A sidelink device switches from a first bandwidth part (BWP) for sidelink communication to a second BWP for the sidelink communication and suspends, releases, or continues to use one or more reserved resources in the first BWP based on the switch from the first BWP to the second BWP for the sidelink communication.