Sidelink Resource Selection via MAC CE Auxiliary Information
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Solution Overview
Problem
Current D2D communication systems face challenges in resource selection for sidelink communication, leading to high interference levels and suboptimal resource choices due to the lack of consensus on how to transmit resource selection auxiliary information effectively.
Innovation Solution
The proposed method involves a first UE sending resource selection auxiliary information to a second UE via sidelink based on specific triggering conditions, such as detecting a resource conflict or receiving a request for the information, using MAC CE as a container for transmission, and managing timers to ensure timely and effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If resource selection auxiliary information is transmitted continuously, then resource selection optimization is improved, but signaling overhead and energy consumption increase
Solution Approach 1:
The patent implements periodic transmission of resource selection auxiliary information through MAC CE at configured intervals rather than continuous transmission. The network configures a periodicity for MAC CE transmission, allowing the receiving UE to obtain updated resource selection information periodically while reducing signaling overhead and energy consumption compared to continuous transmission.
Solution Approach 2:
The receiving UE autonomously determines when to request and process resource selection auxiliary information based on its own resource selection needs. The UE can trigger a request for resource selection auxiliary information when it determines that current resource selections are suboptimal, eliminating the need for continuous network-controlled transmissions.
2Loss of time
If resource selection auxiliary information is transmitted frequently, then resource selection timeliness is improved, but signaling overhead increases
Solution Approach 1:
The patent implements a feedback mechanism where the receiving UE sends a request for resource selection auxiliary information to the transmitting UE when it detects that current resource selections are suboptimal. This feedback-driven approach ensures timely transmission of auxiliary information only when needed, avoiding unnecessary signaling overhead from frequent periodic transmissions.
Solution Approach 2:
The network configures a periodicity for MAC CE transmission that balances timeliness requirements with signaling overhead constraints. The periodic transmission ensures that resource selection auxiliary information is updated regularly without requiring continuous or overly frequent transmissions, optimizing the trade-off between timeliness and overhead.
3Manufacturing precision
If multiple UEs transmit resource selection auxiliary information simultaneously, then resource selection accuracy is improved, but interference increases
Solution Approach 1:
The patent introduces the MAC CE as an intermediary container for transmitting resource selection auxiliary information. The MAC CE is transmitted through the physical sidelink shared channel (PSSCH) with proper resource allocation and timing, mediating the interaction between multiple UEs to reduce direct interference. The structured MAC CE format includes resource allocation information that coordinates transmissions to minimize collisions.
Data Source
AI summary
An information transmission method is provided in the present application. In the information transmission method, in response that a target condition is met, a first UE sends resource selection auxiliary information to a second UE via a sidelink; where the target condition comprises at least one of: the first UE detecting, in the sidelink, an event that triggers the resource selection auxiliary information to be sent; or the first UE receiving request information sent by the second UE for requesting the resource selection auxiliary information.