Relay Communication Method Using Location Codes for V2X
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Solution Overview
Problem
In 5G communication systems, especially in vehicle-to-everything (V2X) and disaster scenarios, the broadcast-based relay method leads to radio resource waste and communication collisions due to unnecessary relay transmissions, reducing data reliability and increasing delay times in UE-to-UE communication.
Innovation Solution
A method that uses GPS coordinates and map information to generate a location code indicating the vehicle's position, direction, and lane, allowing only relevant UEs to relay messages, thereby preventing unnecessary data reception and retransmission, and reducing the number of relay hops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If broadcast-based relay method is used in V2X systems, then message delivery coverage is extended, but radio resource waste and communication collisions increase
Solution Approach 1:
The patent applies local quality by making relay transmission behavior location-dependent. Each UE determines whether to relay based on its geographic position relative to the source UE and target UE, using location codes and direction information. This ensures that only UEs in relevant geographic areas perform relay transmission, extending coverage to necessary regions while avoiding unnecessary transmissions in other areas, thus preventing radio resource waste.
2Reliability
If all UEs perform relay transmission, then message delivery reliability is improved, but communication collisions increase
Solution Approach 1:
The patent makes relay transmission behavior location-dependent by using location codes and direction information. Each UE determines whether to relay based on its geographic position, ensuring that only UEs in relevant areas perform relay transmission. This selective approach maintains message delivery reliability through sufficient relay nodes while preventing communication collisions by avoiding redundant transmissions from UEs outside the target area.
3Speed
If relay transmission is performed without location filtering, then message delivery speed is increased, but unnecessary relay operations consume additional time
Solution Approach 1:
The patent applies preliminary action by having UEs pre-determine their relay eligibility before performing relay transmission. Each UE decodes the location code and direction information from the received message, compares its own location with the encoded location, and decides whether to relay in advance. This preliminary filtering prevents unnecessary relay operations, reducing the time wasted on redundant transmissions while maintaining fast message delivery through efficient relay selection.
Data Source
AI summary
Disclosed is a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G communication system such as LTE. Provided in the present disclosure is a relay-based communication method for a communication terminal provided in a vehicle, comprising the steps of: acquiring global positioning system (GPS) coordinates of the vehicle; determining a traveling direction of the vehicle on the basis of map information and the GPS coordinates; sensing a traveling lane of the vehicle; generating a location code including information on the GPS coordinates, the traveling direction, and the traveling lane; and generating a message, which includes the generated location code, and transmitting the message.