Cellular Network V2V Channel Allocation
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Solution Overview
Problem
Existing vehicle-to-vehicle (V2V) communication systems face challenges in achieving reliable and low-latency communication due to contention-based access to radio channels, leading to potential collisions and delays.
Innovation Solution
A method and device that utilize a cellular network to allocate specific resources for V2V communication messages, providing channel information to V2V communication devices when they enter a new region, allowing them to transmit messages efficiently using Time Division Multiple Access (TDMA) or Frequency Division Multiple Access (FDMA) schemes, thereby avoiding collisions and ensuring consistent communication across multiple cells within an ITS region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a contention-based system is used for V2V communication, then devices can access the radio channel independently, but collisions occur leading to delays and reduced reliability
Solution Approach 1:
The cellular network base station acts as an intermediary that coordinates V2V communication resource allocation. Instead of devices independently accessing the channel (contention-based), the base station assigns specific time-frequency resources to V2V devices, eliminating collisions while maintaining independent V2V message transmission capability.
2Manufacturing precision
If channel allocation is performed per cell, then resource management is precise, but signaling overhead increases when devices move between cells
Solution Approach 1:
The patent merges multiple cells into a single ITS region where a unified channel allocation is applied. When a V2V device moves between cells within the same ITS region, it continues using the same channel information without requiring re-allocation signaling, thus reducing signaling overhead while maintaining precise resource management at the region level.
3Reliability
If dedicated resources are allocated for V2V communication, then collision-free transmission is achieved, but network control complexity increases
Solution Approach 1:
The base station implements a universal channel allocation mechanism that serves multiple functions: it manages V2V communication resources, handles device mobility across cell boundaries, and maintains consistency within ITS regions. This multi-functional approach reduces overall network control complexity compared to separate mechanisms for each function.
Data Source
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AI summary
A node (200-1) of a cellular network detects entry of a vehicle-to-vehicle communication device (100) into a cell of the cellular network. Further, the node (200-1) allocates resources to the vehicle-to-vehicle communication device (100). Then, the node (200-1) sends channel information to the vehicle-to-vehicle communication device (100). This may involve including the channel information into a handover command to the vehicle-to-vehicle communication device (100). The channel information indicates the allocated resources. The vehicle-to-vehicle communication device (100) used the allocated resources for sending of vehicle-to-vehicle communication messages.