Base Station V2X Message Segmentation for Targeted Broadcast
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Solution Overview
Problem
Current radio communication systems lack a method to efficiently broadcast messages from a radio terminal to a plurality of other terminals in vehicle-to-everything (V2X) services without involving a server, specifically in scenarios like emergency stop, queue warning, and road safety services.
Innovation Solution
A base station equipped with a wireless transceiver and processor configures a dedicated carrier frequency band for V2X services, allowing it to transmit messages received from one radio terminal to a specific group of terminals using broadcast/multicast signals, with the V2X service area defined independently from cellular network cells, enabling one-to-many message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a base station broadcasts messages to all vehicles in its coverage area using traditional cellular networks, then message delivery coverage is improved, but message relevance and information accuracy deteriorate because all vehicles receive the same message regardless of their specific context or location
Solution Approach 1:
The patent segments the broadcast message into multiple versions, each tailored to specific service areas or vehicle groups. The base station divides the coverage area into different service areas and transmits different message content to different segments, ensuring that each vehicle receives relevant information appropriate to its location and context.
Solution Approach 2:
The patent implements local quality by customizing message content according to specific service areas. Each service area receives message content that is locally relevant, with the base station transmitting different message versions to different geographic areas or vehicle groups based on their specific needs and contexts.
2Loss of information
If a base station transmits messages to multiple vehicles using unicast communication, then message relevance is improved, but communication efficiency and resource utilization deteriorate due to repeated transmission of similar messages
Solution Approach 1:
The patent makes the base station multi-functional by enabling it to perform both unicast and broadcast/multicast operations. The base station can transmit messages individually to specific vehicles when high relevance is needed, while also broadcasting to multiple vehicles simultaneously when efficiency is prioritized, thus achieving both message relevance and communication efficiency through a single universal platform.
Solution Approach 2:
The patent applies partial action by selectively broadcasting messages to specific groups of vehicles rather than all vehicles in coverage. The base station determines the appropriate transmission scope based on message type and service area, transmitting to exactly the number of vehicles needed rather than excessive broad coverage, thus balancing relevance and efficiency.
3Device complexity
If V2X service areas are aligned with cellular network cells, then network management complexity is reduced, but V2X service flexibility and adaptability deteriorate because V2X services cannot cover areas outside cellular cell boundaries
Solution Approach 1:
The patent introduces a new dimension for service area definition by decoupling V2X service areas from cellular network cell boundaries. Service areas are defined independently using geographic coordinates or road network segments, allowing V2X services to cover any geographic area regardless of cellular cell structure, thus achieving flexibility without being constrained by the cellular network's dimensional framework.
Solution Approach 2:
The patent introduces a service area identification mechanism as an intermediary layer between the base station and vehicles. This intermediary layer maps V2X service areas to base station coverage areas, allowing the network to manage services based on geographic or logical service areas rather than cellular cell boundaries, thus providing flexibility while maintaining manageable network control.
Data Source
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AI summary
A base station (100) transmits configuration information regarding a specific signal to a first radio terminal (120) (Step 201). Further, in response to reception (Step 203) of a specific signal (150) from the first radio terminal (120), the base station (100) transmits a first message carried by the specific signal (150), or a second message derived from the first message, using a broadcast/multicast signal (160) to be received by a plurality of radio terminals (121-123) (Step 205). It is thus, for example, possible to contribute to achievement of a configuration that enables a Road Side Unit (RSU) or a base station to broadcast a message received from one radio terminal to a plurality of other radio terminals.