V2V Communication Resource Allocation for Low Latency
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Solution Overview
Problem
Existing vehicle-to-vehicle (V2V) communication technologies, such as IEEE 1609 standards and LTE D2D methods, face challenges in meeting urgent message transmission requirements due to high latency and complex session setup procedures, which are inadequate for safety-related applications that demand fast and reliable communication in dynamic vehicular environments.
Innovation Solution
The proposed solution involves an apparatus and method that assigns and reserves dedicated radio resources for V2V services within an LTE network, allowing direct communication between vehicles without involving the base station, enabling fast session setup and reducing latency by pre-configuring Local Area Broadcasting (LAB) channels for V2V services, and dynamically allocating resources based on system load and service types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSMA/CA transmission rule is used in WAVE standard, then channel access is controlled, but transmission delay increases for urgent messages
Solution Approach 1:
The patent pre-allocates dedicated resources for V2V communication at the network side before actual transmission occurs. This preliminary resource assignment eliminates the need for runtime channel sensing and contention resolution, allowing urgent messages to be transmitted immediately without CSMA/CA delays.
Solution Approach 2:
The patent extracts V2V communication from the general cellular access procedure by creating a separate, dedicated resource pool specifically for V2V services. This separation allows V2V messages to bypass the standard CSMA/CA channel access mechanism and be transmitted directly on pre-assigned resources.
2Adaptability or versatility
If CCH monitoring interval of 50 ms is used in WAVE, then service channel switching is enabled, but urgent message transmission latency increases
Solution Approach 1:
The network side performs preliminary resource allocation and configuration for V2V communication before the vehicle needs to transmit urgent messages. This pre-configuration includes assigning specific time-frequency resources and providing necessary system information, eliminating the need for vehicles to wait for CCH intervals to request or acquire resources.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network side (eNB) maintains and manages a dedicated resource pool for V2V communication. This intermediary resource pool acts as a buffer between the network control and V2V transmission, allowing vehicles to directly access pre-prepared resources without going through the standard CCH monitoring and service channel switching procedure.
3Reliability
If D2D session setup procedures are followed in LTE, then resource allocation is controlled, but session setup complexity and time increase
Solution Approach 1:
The patent extracts the resource allocation function from the complex D2D session setup procedure by implementing a dedicated resource pool mechanism. Instead of going through multi-step session establishment including resource request, allocation, and confirmation, vehicles directly access pre-configured resources from the dedicated pool, dramatically simplifying the procedure while maintaining network control over resource distribution.
Solution Approach 2:
The network side performs preliminary resource allocation and configuration for V2V communication before actual transmission needs arise. System information blocks carry pre-assigned resource information that vehicles can directly use, eliminating the need for runtime session setup procedures and their associated complexity.
4Reliability
If dedicated WAVE network infrastructure is built, then V2V communication capability is provided, but capital investment and deployment difficulty increase
Solution Approach 1:
The patent makes existing cellular network infrastructure universal by enabling it to simultaneously support both traditional cellular services and V2V communication services. The eNB maintains a dedicated resource pool that serves V2V communication needs while utilizing the same physical infrastructure, eliminating the need for separate WAVE network deployment.
Solution Approach 2:
The patent merges V2V communication functionality into the existing cellular network infrastructure. By allowing the cellular network to provide both cellular access and V2V services through integrated resource management, the solution combines the benefits of established cellular infrastructure with emerging V2V communication requirements, avoiding duplicate infrastructure investment.
Data Source
AI summary
It is provided a method, comprising assigning a first direct resource of a radio interface to a first vehicle-to-vehicle service based on a resource information received from a base station in a cellular mode via a cellular resource of the radio interface, wherein, in the resource information, the first direct resource and the first vehicle-to-vehicle service are indicated as being correlated, and the first vehicle-to-vehicle service is to be used or to be provided by at least a first one of one or more vehicle devices, and wherein, in the cellular mode, a communication of an apparatus performing the method with each of the one or more vehicle devices different from the apparatus is performed via the base station; performing the first vehicle-to-vehicle service via the first direct resource in a vehicle-to-vehicle mode, wherein, in the vehicle-to-vehicle mode, the communication of the apparatus with each of the one or more vehicle devices is performed directly with the respective vehicle device and does not involve the base station.