WUR Transceiver Segmentation for ITS Channel Collision Reduction
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Solution Overview
Problem
In wireless local area networks (WLANs), especially in intelligent transportation systems (ITS), low-power operation methods face challenges such as increased channel collisions and reduced operating time due to limited channel configuration and high power requirements for long-distance communications, leading to potential safety issues when a large number of vehicles are involved.
Innovation Solution
A method and apparatus utilizing a wake-up radio (WUR) with a first transceiver operating in a low-power mode and a second transceiver in an on-state, where the second transceiver monitors for wake-up frames and transmits data frames without redundant wake-up frames, optimizing channel usage and reducing power consumption by determining valid wake-up frames based on reception strength and battery charge levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If high power is used for long-distance communications in ITS, then communication range is improved, but operating time of low-power receiver is reduced
Solution Approach 1:
The communication system is segmented into two distinct transceivers: a primary transceiver for low-power operation and a secondary transceiver for high-power long-distance communication. This segmentation allows the system to use high power only when necessary for wake-up frames, while maintaining low-power operation for data transmission, thus extending the operating time of the low-power receiver without sacrificing communication range capability.
Solution Approach 2:
The system dynamically changes power parameters by switching between two transceivers based on communication needs. The secondary transceiver operates at high power for wake-up frame transmission to ensure long-distance coverage, while the primary transceiver operates at low power for data transmission, optimizing both communication range and power consumption over time.
2Duration of action of moving object
If low-power operation method is supported in ITS, then operating time of low-power receiver is increased, but channel collisions increase due to limited channel configuration
Solution Approach 1:
The system segments communication functions into wake-up frame transmission (using secondary transceiver) and data transmission (using primary transceiver). This segmentation allows wake-up frames to be transmitted on dedicated channels when needed, reducing channel contention and collision probability while maintaining low-power operation for the primary transceiver during data transmission phases.
Solution Approach 2:
The system performs preliminary wake-up frame transmission before data transmission. By using the secondary transceiver to send wake-up frames in advance, the system ensures receiving terminals are awake and ready, allowing subsequent data transmission to proceed without collisions since the channel is reserved for the coordinated communication sequence.
3Productivity
If a large number of wake-up frames are transmitted by multiple vehicles, then channel occupancy increases, but communication reliability decreases
Solution Approach 1:
The system extracts the wake-up frame transmission function into a separate secondary transceiver, distinct from the primary data transmission transceiver. This extraction allows wake-up frames to be handled separately with dedicated resource allocation, preventing them from competing for the same channel resources as data transmissions, thus maintaining communication reliability even with multiple vehicles transmitting simultaneously.
Solution Approach 2:
The secondary transceiver acts as an intermediary for wake-up frame transmission, mediating between the need to wake up receiving terminals and the requirement to maintain reliable data communication. By handling wake-up frames through this intermediary transceiver with separate resource management, the system prevents channel congestion and maintains overall communication reliability in multi-vehicle environments.
Data Source
AI summary
Disclosed is a method for transmitting/receiving information using WUR. A communication node comprises: a processor; a memory containing one or more instructions executed by the processor; a first transceiver operating on the basis of the one or more instructions; and a second transceiver operating on the basis of the one or more instructions.