Sidelink Discovery Probing for Power-Efficient Wireless Resource Allocation
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Solution Overview
Problem
Current sidelink communication systems in wireless networks, such as 5G NR, face inefficiencies in discovery processes, particularly in power consumption and resource usage, due to the continuous transmission of large discovery messages without confirming the presence of nearby devices.
Innovation Solution
Implementing a sidelink discovery probing message with a reduced size, including only a first identifier of the sidelink device, which is transmitted without service information, and monitoring for a probing response to determine if a larger discovery message should be sent, thereby optimizing power usage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous transmission of large discovery messages is used, then device discovery coverage is improved, but power consumption increases
Solution Approach 1:
The discovery process is segmented into two stages: first transmitting a small probing message to check for device presence, then conditionally transmitting a larger discovery message only if needed. This segmentation reduces unnecessary power consumption while maintaining discovery coverage.
Solution Approach 2:
A probing message is transmitted preliminarily before the full discovery message to verify device presence. This preliminary action prevents wasteful transmission of large discovery messages when no devices are present, thereby reducing power consumption.
2Reliability
If continuous transmission of large discovery messages is used, then device discovery reliability is improved, but wireless resource usage increases
Solution Approach 1:
The discovery message is segmented into a small probing message and a larger full discovery message. The probing message uses minimal wireless resources to check for presence, and the full message is transmitted only when necessary, optimizing resource usage while maintaining reliability.
Solution Approach 2:
Instead of always transmitting the full discovery message, the system performs a partial action (probing message) first. This partial transmission consumes fewer wireless resources and is sufficient to determine whether the full message is needed.
3Use of energy by moving object
If reduced size probing messages are transmitted, then power consumption is reduced, but information completeness decreases
Solution Approach 1:
Information is segmented into essential identification data (in probing message) and detailed service information (in full discovery message). The probing message contains only necessary identification information to establish presence, reducing power consumption while avoiding loss of critical data.
Solution Approach 2:
The probing message acts as an intermediary that carries minimal identification information to initiate the discovery process. Full service information is transmitted later through the complete discovery message only when the intermediary step confirms device presence, balancing power efficiency and information completeness.
Data Source
AI summary
To more efficient sidelink communications, methods, apparatuses, and computer program products are provided. An example method of a first wireless device operating includes transmitting a sidelink discovery probing message comprising at least a first identifier of the first sidelink device. The example method further includes monitoring for a probing response from a second sidelink device. The example method further includes transmitting a sidelink discovery message if the first sidelink device receives the probing response from the second sidelink device. The example method further includes skipping transmitting the sidelink discovery message if the first sidelink device does not receive the probing response from the second sidelink device.