Sidelink Single-Shot Sensing for Resource Allocation
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Solution Overview
Problem
Battery-operated UEs in autonomous resource selection mode face high power consumption, increased collision probability, and reduced reliability and latency due to continuous sensing in sidelink communication, especially in congested scenarios, which affects power savings and resource pool efficiency.
Innovation Solution
Implementing single-shot sensing and look-ahead information to reduce power consumption, latency, and collision probability by allowing UEs to quickly determine available resources without continuous sensing, enabling fast decoding and resource selection within a single slot, and using flexible resource shaping and look-ahead information to support resource selection without prior reservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous sensing is performed in sidelink communication, then resource selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic sensing at specific intervals (e.g., every 100ms or 200ms) rather than continuous sensing, allowing the UE to periodically wake up and perform sensing operations. This periodic approach maintains resource selection reliability by regularly updating channel conditions while significantly reducing power consumption by keeping the receiver dormant between sensing periods.
Solution Approach 2:
The patent performs sensing operations in advance before actual data transmission is needed. By conducting sensing during predefined sensing windows and preparing resource selections beforehand, the system ensures reliable resource availability when transmission is required while avoiding the need for continuous monitoring, thus reducing overall power consumption.
2Reliability
If continuous sensing is performed in sidelink communication, then collision probability is reduced, but latency increases
Solution Approach 1:
The patent performs sensing and resource selection in advance during predefined sensing windows before the actual transmission window. By preparing resource selections beforehand based on sensed channel conditions, the system reduces collision probability through thorough advance analysis while minimizing latency by having resources ready for immediate transmission without waiting for continuous sensing updates.
Solution Approach 2:
The patent divides the time domain into distinct sensing windows and transmission windows, with sensing operations confined to specific sensing intervals. This segmentation allows concentrated sensing efforts during designated periods to identify suitable resources, followed by transmission using pre-selected resources, thereby reducing both collision probability through systematic sensing and latency by avoiding continuous monitoring delays.
3Reliability
If resource reservation is performed in advance, then resource availability is ensured, but resource pool efficiency is reduced
Solution Approach 1:
The patent performs resource reservation for only a portion of future transmissions rather than all resources in advance. By reserving resources for initial transmissions and allowing dynamic selection for retransmissions or additional data, the system ensures resource availability for critical initial transmissions while improving resource pool efficiency by allowing other UEs to utilize non-reserved resources, thus reducing resource waste.
Data Source
Figure 1a~1b
Figure 2~3a
Figure 3b~3c
AI summary
Embodiments provide a transceiver of a wireless communication system, wherein the transceiver is configured to operate in a sidelink in-coverage, out of coverage or partial coverage scenario, in which resources for a sidelink communication are pre-configured by the wireless communication system or allocated or scheduled autonomously by the transceiver, wherein the transceiver is configured to perform a single-shot-sensing on resources of the sidelink prior to a sidelink transmission to another transceiver or multiple other transceivers of the wireless communication system, in order to obtain a sensing information, wherein the transceiver is configured to determine, for said sidelink transmission, a set of candidate resources out of the resources of the sidelink based on the sensing information, wherein the transceiver is configured to select, for said sidelink transmission, resources out of the set of candidate resources and to perform said sidelink transmission using the selected resources, wherein the resources of the sidelink are accessed in the time domain on a slot basis, wherein the transceiver is configured to select the resources out of the set of candidate resources for said sidelink transmission and to be ready to perform said sidelink transmission until an end of a last occurring slot of a sensing window used for said single-shot-sensing.