5G NR Sidelink Paging With Staged Resource Selection
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Solution Overview
Problem
In sidelink communication systems, particularly in 5G NR, resource allocation for paging messages and wake-up signals without considering current resource occupancy can lead to collisions, deteriorating energy efficiency and reception performance.
Innovation Solution
A method involving independent configuration of A, B, and C windows for resource sensing and selection, where A window is for paging message transmission, B window for both paging message and data transmission resource sensing, and C window for data transmission resource selection, with early termination and reconfiguration based on data size, latency, and priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a paging message is transmitted in a preconfigured sidelink resource without considering current resource occupancy state, then the transmission procedure is simple and fast, but transmission collisions occur and energy efficiency deteriorates
Solution Approach 1:
The transmitting terminal performs resource sensing operations in advance (in windows A and B before the actual transmission time) to identify occupied resources. This preliminary action allows the terminal to select an appropriate transmission resource that avoids collisions, while still maintaining relatively fast transmission by using pre-configured resource pools and window-based sensing rather than real-time sensing.
2Reliability
If resource sensing is performed for both paging message and data transmission, then transmission reliability is improved, but the time required for resource selection increases
Solution Approach 1:
The resource sensing process is segmented into two distinct phases: first resource sensing operation (in window A) for paging message transmission, and second resource sensing operation (in window B) for data transmission. This segmentation allows each sensing operation to focus on specific resources, reducing the complexity and time required compared to a single comprehensive sensing operation.
Solution Approach 2:
Both resource sensing operations are performed in advance within configured windows before the actual transmissions occur. The first sensing operation completes before the paging message transmission time, and the second sensing operation completes before the data transmission time. This preliminary action eliminates the need for real-time sensing during transmission, significantly reducing time loss.
3Reliability
If multiple windows (A, B, C) are configured for resource sensing and selection, then transmission collision prevention is improved, but device complexity increases
Solution Approach 1:
The transmission process is segmented into distinct temporal windows: window A for first resource sensing (paging message), window B for second resource sensing (data transmission), and window C for actual transmissions. Each window has a specific purpose and timing, which simplifies the control logic compared to a single complex sensing mechanism. The segmentation is implemented through standard time-based resource allocation structures.
Solution Approach 2:
The window-based resource sensing mechanism serves multiple functions simultaneously: it prevents transmission collisions, ensures reliable resource selection, enables energy efficient operation, and maintains compatibility with existing 5G NR sidelink resource allocation frameworks. This multi-functionality reduces the need for additional separate mechanisms, thereby limiting the increase in device complexity.
Data Source
AI summary
A method for paging in sidelink communication include the steps of: receiving window configuration information from a base station; performing a first resource sensing operation for transmission of a paging message within A window indicated by the window configuration information to determine P candidate resources; performing an operation of selecting a P transmission resource from among the P candidate resources within B window indicated by the window configuration information, and a second resource sensing operation for transmission of data associated with the paging message; and transmitting the paging message to a receiving terminal by use of the P transmission resource.