Sidelink Bandwidth Part Switching Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink bandwidth parts (BWP) for user equipment (UE), leading to potential power consumption issues and reduced reliability in sidelink communications.
Innovation Solution
A method and apparatus for UE to transmit and receive messages to coordinate sidelink BWP switching, ensuring that both UE devices switch to sidelink BWPs with matching resource pools, thereby enhancing communication reliability and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink BWP switching is implemented without coordination, then BWP flexibility is improved, but communication reliability deteriorates due to mismatched resource pools
Solution Approach 1:
The patent implements a feedback mechanism where the first UE transmits a first message to the second UE to indicate the first sidelink BWP, and the second UE transmits a second message back to confirm the BWP switch. This feedback loop ensures both UEs are synchronized on the resource pool configuration, preventing communication reliability deterioration while maintaining BWP flexibility.
Solution Approach 2:
The patent requires preliminary coordination before actual BWP switching occurs. The first message indicates the intended BWP switch with resource pool information, and the second message confirms acceptance before the actual switch is activated. This preliminary action ensures both UEs agree on matching resource pools, resolving the reliability issue.
2Productivity
If multiple sidelink BWPs are configured, then spectral efficiency is improved, but power consumption increases due to monitoring multiple resource pools
Solution Approach 1:
The patent segments the BWP configuration into multiple sidelink BWPs with different resource pools, allowing the system to leverage multiple BWPs for spectral efficiency. However, the coordinated switching mechanism ensures that at any given time, both UEs are synchronized on a single active BWP with matching resource pools, reducing the need for continuous monitoring of multiple configurations and thus managing power consumption.
Solution Approach 2:
The patent implements dynamic BWP switching where the active sidelink BWP can be changed based on communication needs. The coordinated message exchange mechanism allows dynamic switching between multiple BWPs to optimize spectral efficiency while ensuring both UEs are synchronized, preventing the need for continuous monitoring of all configured BWPs and thereby managing power consumption.
3Reliability
If coordinated BWP switching with message exchange is implemented, then communication reliability is improved, but protocol complexity increases
Solution Approach 1:
The patent uses a feedback mechanism with standardized message types (first message for indication, second message for confirmation) to coordinate BWP switching. This structured feedback approach improves reliability by ensuring synchronization between UEs while keeping the protocol complexity manageable through standardized message formats and clear state transitions.
Solution Approach 2:
The patent designs the message exchange mechanism to serve multiple functions: indicating BWP switch, confirming synchronization, and validating resource pool matching. By making the message exchange mechanism multi-functional, the patent improves reliability without proportionally increasing protocol complexity, as the same message structures handle multiple coordination tasks.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE, a first message that indicates a sidelink bandwidth part (BWP) switch, for the second UE, to a first sidelink BWP, where the first message includes an indication of the first sidelink BWP and a first sidelink resource pool in the first sidelink BWP. The first UE may transmit, to the second UE, a second message that confirms the sidelink BWP switch for the second UE. The first UE may receive, from the second UE, a third message that activates the sidelink BWP switch, for the second UE, to the first sidelink BWP. Numerous other aspects are described.