Inter-UE Sidelink Coordination to Reduce V2X Power Consumption
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently allocating resources for vehicle-to-everything (V2X) communication, particularly in scenarios where UEs are outside base station coverage, leading to issues like hidden nodes, exposed nodes, and high power consumption for resource selection.
Innovation Solution
Implementing inter-UE coordination methods where UEs share resource allocation information through sidelink communication, allowing for improved resource allocation and reduced power consumption by enabling UEs to receive resource allocation from other UEs, especially in scenarios where direct sensing is challenging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs perform direct sensing for resource allocation in V2X communication, then resource allocation can be performed autonomously without base station coverage, but power consumption increases and hidden node problems occur
Solution Approach 1:
The patent introduces a coordinating UE that acts as an intermediary to manage resource allocation for multiple UEs. Instead of each UE performing independent sensing (which consumes high power), the coordinating UE performs sensing and shares resource allocation information with other UEs through sidelink communication. This mediator approach reduces individual UE power consumption while maintaining autonomous operation capability.
Solution Approach 2:
The patent merges the resource allocation functions of multiple UEs into a single coordinating UE. The coordinating UE performs sensing and resource selection on behalf of the group, combining what would otherwise be duplicate operations performed by each individual UE. This consolidation significantly reduces total power consumption in the system.
2Adaptability or versatility
If UEs perform direct sensing for resource allocation, then autonomous communication is enabled, but hidden node and exposed node problems arise
Solution Approach 1:
The patent implements a feedback mechanism where the coordinating UE shares resource allocation information and sensing results with other UEs through sidelink communication. This feedback loop allows UEs to make informed resource allocation decisions based on collective sensing data, reducing hidden node problems where UEs would otherwise be unaware of ongoing transmissions from distant nodes.
Solution Approach 2:
The coordinating UE performs sensing and resource allocation in advance, determining suitable resources before other UEs need to transmit. This preliminary action allows the coordination information to be shared with other UEs beforehand, enabling them to avoid hidden node conflicts and exposed node scenarios by knowing the allocated resources in advance.
3Extent of automation
If each UE performs independent resource sensing, then autonomous operation is achieved, but resource allocation efficiency decreases
Solution Approach 1:
The coordinating UE performs multiple functions: it acts as a sensor for the group, a resource allocator, and an information distributor. This multi-functional approach eliminates the need for each UE to independently perform sensing and allocation, improving overall system efficiency while maintaining autonomous operation. The coordinating UE's resource allocation decisions benefit the entire group, maximizing resource utilization.
Data Source
AI summary
The disclosure relates to technologies for sensor networks, machine to machine (M2M), machine type communication (MTC), and Internet of things (IoT). The disclosure may be used for intelligent services (smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, or the like) based on the above technology. A method of inter-user equipment (UE) coordination in sidelink communication and a procedure through which the UE performs resource selection are provided. The method includes receiving a request message requesting transmission of inter-UE coordination information from a second UE, determining inter-UE coordination information based on the request message, and transmitting the determined inter-UE coordination information to the second UE.