Vehicle Gateway Random Preamble for Cellular Access Latency
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Solution Overview
Problem
Current vehicle and cellular integrated networks face challenges in fast access and gateway management, particularly in maintaining RRC connections and handover procedures for vehicle gateway communications, which are not adequately addressed in existing research.
Innovation Solution
The solution involves defining a dedicated vehicle gateway random preamble group and new cause values for RRC connection establishment requests, enabling vehicles to act as mobile gateways with enhanced access to cellular networks through LTE interfaces, and implementing semi-persistent resource allocation for reduced latency and improved resource usage during initial access and handover processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static gateways (RSU) are deployed on the roadside at fixed distances, then vehicle gateway access is provided, but system deployment cost increases
Solution Approach 1:
The patent transforms the static gateway deployment model into a dynamic one by enabling vehicles to act as mobile gateways. Vehicles equipped with gateway functionality can move throughout the network, providing gateway services dynamically rather than requiring fixed infrastructure at every location. This reduces the number of static RSUs needed while maintaining reliable access coverage.
Solution Approach 2:
Vehicles in the network can serve themselves as gateways for other vehicles. Instead of relying entirely on infrastructure-deployed RSUs, the system enables vehicles to provide gateway services to their peers, creating a self-sustaining network where nodes contribute to the overall system functionality.
2Loss of time
If dedicated random preamble groups and semi-persistent resource allocation are implemented, then access latency is reduced, but device complexity increases
Solution Approach 1:
The patent implements semi-persistent resource allocation where resources are pre-configured and allocated in advance for vehicle gateway communications. Instead of performing complex resource negotiation each time a vehicle needs access, the necessary resources are prepared beforehand through semi-persistent allocation, significantly reducing access latency while the complexity is amortized over time.
Solution Approach 2:
The patent segments the random access procedure by introducing dedicated random preamble groups specifically for vehicle gateways. This segmentation allows gateway vehicles to use a specialized, optimized access path rather than competing with regular vehicles for general resources, reducing access latency through dedicated channels while keeping the overall system manageable through structured organization.
Data Source
AI summary
The present invention addresses a method, apparatus and computer program product for vehicle gateway access in cellular network for vehicle communications. A dedicated Vehicle gateway random preamble is defined to serve the vehicle gateway access to the network in order to resolve the contention during the initial access and thus decrease access latency. In addition to that, a new cause value Vehicle gateway originated data/signaling for the RRC connection establishment request is defined to inform the network that the coming data traffic is from the vehicle communication.