Sidelink Sync Signal Power Control for V2X Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sidelink communication networks in NR V2X environments face inefficiencies due to high power transmission of synchronization signals, leading to increased energy consumption and potential interference with nearby base stations and synchronization sources.
Innovation Solution
The user equipment (UE) is configured to receive sidelink synchronization signal identifiers (SLSS IDs) from nearby synchronization sources, such as base stations and SyncRef user devices, to operate power control of synchronization signal transmission, reducing power consumption and expanding synchronization coverage efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional user devices transmit synchronization signals with high power to ensure coverage, then synchronization coverage is improved, but energy consumption increases and interference with nearby base stations occurs
Solution Approach 1:
The patent applies local quality by making the transmission power location-dependent. UEs determine their geographic position relative to the base station and synchronization coverage area, then adjust transmission power accordingly. UEs closer to the base station or within coverage areas of other SyncRef UEs use lower power, while those at coverage edges use higher power, optimizing both coverage and energy efficiency.
Solution Approach 2:
The patent implements dynamics by making transmission power adjustable and adaptive rather than fixed. The UE dynamically selects from multiple power levels based on real-time conditions including position, received signal strength from base station and other SyncRef UEs, and current synchronization coverage requirements. This dynamic adjustment resolves the contradiction between maintaining coverage and reducing energy consumption.
2Area of stationary object
If conventional user devices transmit synchronization signals with high power to ensure coverage, then synchronization coverage is improved, but interference with nearby base stations occurs
Solution Approach 1:
The patent applies local quality by making the transmission power location-dependent. UEs determine their geographic position relative to the base station and synchronization coverage area, then adjust transmission power accordingly. UEs closer to the base station or within coverage areas of other SyncRef UEs use lower power, while those at coverage edges use higher power, optimizing both coverage and energy efficiency.
Solution Approach 2:
The patent converts the potentially harmful effect of high power transmission into a benefit by using power adjustments strategically. Instead of uniformly high power causing interference, the system uses higher power only where necessary for coverage extension while using lower power near base stations, transforming the interference problem into a controlled coverage optimization solution.
3Use of energy by moving object
If user equipment dynamically adjusts synchronization signal power based on received power measurements, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by having UEs continuously measure received power from the base station and other SyncRef UEs, then use this feedback information to adjust their own transmission power. This closed-loop feedback mechanism enables energy-efficient operation while keeping the control logic relatively simple, as UEs only need to compare measured power levels against thresholds and select from predefined power levels rather than performing complex calculations.
Data Source
AI summary
A user equipment arranged to operate sidelink communication. The user equipment includes a transceiver that is configured to receive a first signal from a first synchronization source. The user equipment further includes a processor which is configured to obtain a set of sidelink synchronization signal (SLSS), identifiers (IDs). The processor is further configured to operate power control of transmission of a synchronization signal based on the first signal and the set of SLSS IDs. The user equipment manifests a reduced power consumption, an improved energy efficiency as well as an efficient synchronization coverage expansion, in and out of network coverage of a base station.