User Equipment Multi-Carrier Sidelink Selection for Latency-Aware QoS
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Solution Overview
Problem
Existing wireless communication technologies face challenges in managing carrier/resource selection, power control, and collision handling for user equipment operating in mode 4 autonomous scheduling across multiple carriers, particularly in eV2X systems, due to unclear sensing mechanisms and power allocation strategies, especially when user equipment has different capabilities for simultaneous transmission and reception.
Innovation Solution
A user equipment system and method that includes a sensor to sense resource pools across multiple carriers, a resource selector to determine available resources based on priority and capability, and a transmitter to allocate power efficiently, ensuring QoS by selecting resources within a resource selection window considering priorities, latency, and congestion control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If user equipment operates in mode 4 autonomous scheduling across multiple carriers, then resource utilization and communication efficiency are improved, but sensing mechanism complexity and power allocation difficulty increase
Solution Approach 1:
The patent segments the sensing and resource selection process into distinct phases: sensing phase where UE monitors resource pools on multiple carriers, and resource selection phase where available resources are identified based on sensing results. This segmentation simplifies the complex multi-carrier operation by breaking it into manageable steps with clear boundaries.
Solution Approach 2:
The patent implements preliminary sensing action before resource selection. The UE performs sensing on resource pools across multiple carriers in advance to identify available resources, storing sensing results for subsequent resource selection. This preliminary action reduces complexity during the actual transmission by having resource availability pre-determined.
2Reliability
If user equipment performs sensing and resource selection across multiple carriers, then communication reliability is improved, but power consumption and operational complexity increase
Solution Approach 1:
The patent applies local quality by configuring different sensing parameters and resource pool characteristics for different carriers. Each carrier can have customized resource pools with specific time-frequency resources, allowing the UE to optimize sensing and selection based on local conditions of each carrier rather than using a uniform approach across all carriers.
Solution Approach 2:
The patent implements partial sensing action where the UE selectively senses resource pools based on configuration and current needs. Rather than continuously sensing all carriers at full depth, the UE performs sensing at appropriate levels and frequencies, reducing overall power consumption while maintaining sufficient reliability for V2X communication.
3Reliability
If user equipment selects resources based on priority and capability, then QoS guarantee is improved, but resource selection complexity and collision handling difficulty increase
Solution Approach 1:
The patent utilizes parameter changes by incorporating priority levels and UE capability parameters into the resource selection process. Resources are selected based on matching priority requirements with available resources, and UE capabilities (such as simultaneous transmission and reception ability) are considered to determine feasible resource combinations. This parameter-based approach systematically manages QoS guarantees without requiring complex ad-hoc decision-making.
4Productivity
If user equipment handles transmission and reception simultaneously on multiple carriers, then communication efficiency is improved, but collision handling complexity and power control difficulty increase
Solution Approach 1:
The patent implements dynamics by allowing flexible resource selection that adapts to UE capability states. When the UE can simultaneously transmit and receive, it selects resources that enable parallel operations across carriers. When capability is limited, the resource selection dynamically adjusts to avoid conflicts. This dynamic adaptation optimizes communication efficiency while managing collision handling complexity based on real-time conditions.
Data Source
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AI summary
There are provided a user equipment and a method that selects at least one resource across a plurality of carries for transmitting at least one packet in sidelink. The user equipment includes: a sensor, operative to sense a plurality of resource pools of the plurality of carriers within a sensing window to obtain a sensing result, wherein the length of the sensing window is configurable or preconfigured; a resource selector, operative to obtain a plurality of available resources of the plurality of carriers within a resource selection window according to the sensing result, wherein the plurality of available resources are included in at least one resource pool of the plurality of carriers within the resource selection window, the resource selector is operative to select at least one resource from the plurality of available resources of the plurality of carriers within the resource selection window in accordance with at least one of a priority of the at least one resource pool and a priority of the at least one packet, and wherein the length of the resource selection window is determined according to a desired latency; and a transmitter, operative to transmit the at least one packet on the at least one resource which is selected by the resource selector.