V2X Downlink Resource Allocation via MCE Coordination
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Solution Overview
Problem
Current resource allocation schemes for vehicle-to-everything (V2X) message transmission in LTE-based wireless communication systems are either static or fail to dynamically consider the dynamic situations of roads and traffic, leading to inefficient allocation of resources for downlink V2X messages.
Innovation Solution
A method is introduced where a multi-cell/multicast coordination entity (MCE) receives information from a V2X application server on resource allocation for downlink V2X messages, determining cells for single-cell point-to-multipoint (SC-PTM) transmission and forwarding this information to an eNodeB, allowing for dynamic allocation of resources based on time, position, and amount of vehicle information such as accidents or traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If static resource allocation schemes are used for V2X message transmission, then device complexity is reduced and ease of operation is improved, but resource allocation efficiency deteriorates and adaptability to dynamic traffic conditions worsens
Solution Approach 1:
The patent implements dynamic resource allocation for V2X messages by allowing the network to adjust resource allocation based on real-time traffic conditions, vehicle density, and message priority. The system transitions from static pre-configured resources to dynamic allocation where resources can be modified during operation to adapt to changing vehicular communication needs.
Solution Approach 2:
The patent changes key parameters including resource block allocation, transmission power levels, and message periodicity based on traffic conditions. The network can adjust these parameters dynamically to optimize V2X communication efficiency under different scenarios such as high vehicle density, accident conditions, or normal traffic flow.
2Productivity
If dynamic resource allocation based on real-time traffic conditions is implemented, then resource allocation efficiency is improved and adaptability is enhanced, but device complexity and system complexity increase
Solution Approach 1:
The patent introduces a network entity (eNodeB or dedicated V2X management entity) as an intermediary that centralizes the complexity of dynamic resource allocation. This intermediary receives traffic condition information, makes allocation decisions, and manages resource distribution, thereby isolating the complexity from individual vehicles and base stations while maintaining high allocation efficiency.
Solution Approach 2:
The patent creates a multi-functional resource allocation system that can handle multiple V2X scenarios (vehicle-to-vehicle, vehicle-to-infrastructure, emergency messages, routine communications) through a unified allocation framework. This universal approach reduces overall system complexity by avoiding separate specialized mechanisms for each scenario.
3Ease of manufacture
If existing MBMS or SC-PTM based resource allocation schemes are used, then implementation simplicity is maintained, but they fail to adequately address the specific dynamic requirements of V2X communication
Solution Approach 1:
The patent segments the V2X resource allocation into distinct components: control plane signaling for allocation decisions, user plane for message transmission, and separate handling for different message priorities. This segmentation allows the system to leverage existing MBMS/SC-PTM infrastructure while adding V2X-specific dynamic allocation capabilities through targeted modifications.
Solution Approach 2:
The patent transforms the static MBMS/SC-PTM resource allocation into a dynamic system specifically adapted for V2X by introducing real-time condition assessment, priority-based allocation, and flexible resource adjustment mechanisms that respond to changing traffic scenarios while maintaining compatibility with existing frameworks.
Data Source
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AI summary
Upon receiveing an uplink (UL) V2X message from a vehicle user equipment (UE) or a road side unit (RSU) UE, a vehicle-to-everything (V2X) application server determines information on resource allocation for a downlink (DL) V2X message and transmits the information on resource allocation to a multi-cell/multicast coordination entity (MCE). The MCE (for multimedia broadcast multicast services　(MBMS) based resource allocation scheme) or an eNB (for single-cell point-to-multipoint (SC-PTM) resource allocation scheme) allocates resources for the DL V2X message based on the received information on resource allocation.