Sidelink Signal Transmission Parameter Adjustment
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing sidelink communications for vehicle-to-everything (V2X) scenarios, where ensuring low latency and high reliability is crucial for safety services like basic safety messages, cooperative awareness messages, and decentralized environmental notifications, while also optimizing resource allocation and interference mitigation.
Innovation Solution
A method and apparatus for transmitting sidelink signals in a wireless communication system, where user equipment transmits first and second sidelink signals on a sidelink channel with different parameters based on interference from adjacent channels, adjusting transmission rate, power, data size, backoff time, and priority to optimize service-specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission parameters are kept fixed for simplicity, then device complexity is reduced, but reliability deteriorates due to inability to adapt to interference conditions
Solution Approach 1:
The patent implements dynamic parameter adjustment by monitoring interference conditions on adjacent channels and adapting transmission parameters (power, rate, time resources) accordingly. This transforms the static parameter configuration into a dynamic system that responds to changing channel conditions, thereby improving reliability without requiring complex manual intervention.
Solution Approach 2:
The system employs feedback mechanisms where transmission parameters are adjusted based on measured interference conditions from adjacent channels. The UE monitors channel state information and uses this feedback to adaptively modify transmission power, coding rate, and resource allocation, creating a closed-loop control system that enhances reliability while maintaining manageable complexity through automated decision-making.
2Reliability
If transmission power is increased to overcome interference, then signal reliability is improved, but energy consumption increases
Solution Approach 1:
Instead of always increasing transmission power, the patent changes multiple transmission parameters adaptively based on interference conditions. When adjacent channel interference is detected, the system adjusts coding rate, modulation scheme, time resource allocation, and power level in combination, rather than relying solely on power increase. This multi-parameter adaptation achieves reliable communication while optimizing energy consumption.
Solution Approach 2:
The transmission power is made dynamic rather than static, adjusting only when necessary based on real-time interference measurements. The system transitions from a fixed power configuration to a dynamic power control mechanism that responds to channel conditions, reducing unnecessary energy consumption while maintaining reliability when needed.
3Productivity
If resource allocation is optimized for specific services, then service performance is improved, but system complexity increases due to multiple parameter sets
Solution Approach 1:
The patent applies different parameter configurations tailored to specific service requirements (e.g., safety messages vs. other V2X services). Each service type receives optimized parameters locally adapted to its needs, such as different priority levels, time resources, or power allocations. This local quality approach improves service-specific performance while the overall system manages complexity through service-based categorization rather than individual parameter management for each transmission.
4Reliability
If interference mitigation measures are implemented, then communication reliability is improved, but transmission latency increases due to additional processing
Solution Approach 1:
The system performs preliminary monitoring of adjacent channel interference conditions before transmission decisions are made. By proactively detecting interference patterns and pre-adapting transmission parameters, the system avoids last-minute processing delays. This preliminary action allows the UE to prepare appropriate parameter sets in advance, reducing latency while maintaining interference mitigation effectiveness.
Solution Approach 2:
When interference conditions are detected, the system rapidly adjusts parameters and proceeds with transmission without excessive processing delays. The patent implements efficient decision-making mechanisms that skip unnecessary processing steps, allowing quick adaptation to interference conditions and maintaining low latency while achieving reliable communication through parameter optimization.
Data Source
AI summary
Disclosed in various embodiments of the present disclosure are a method for transmitting and receiving a signal in a wireless communication system, and a device for supporting same. As a more specific embodiment, disclosed in various embodiments of the present disclosure are a method by which a user equipment transmits a sidelink signal in a wireless communication system, and a device for supporting same, the method comprising: transmitting a first sidelink signal in a sidelink channel allocated to the user equipment during a first time interval, wherein the sidelink channel is linked with a specific service; and transmitting a second sidelink signal in the sidelink channel during a second time interval positioned after the first time interval in a time domain, wherein the first sidelink signal and the second sidelink signal are transmitted on the basis of a first parameter and a second parameter linked with the specific service, respectively, and the first parameter and the second parameter have different values on the basis of interference between the sidelink channel and a sidelink channel that is adjacent to the sidelink channel in a frequency domain.