Pedestrian Terminal V2X SPS Configuration
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication systems, pedestrian terminals face inefficiencies in communication power consumption due to unnecessary message transmissions, which can lead to increased system load and resource conflicts.
Innovation Solution
A method is proposed where a base station transmits information about secondary cells and semi-persistent scheduling (SPS) configuration to terminals, including SPS index information, allowing terminals to determine whether to transmit P2X messages based on their location, thereby minimizing power consumption and reducing system load by enabling/disabling message transmission in specific zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pedestrian terminals continuously transmit P2X messages in V2X communication, then communication coverage and message delivery are improved, but power consumption increases and system load increases
Solution Approach 1:
The patent applies dynamic control by enabling pedestrian terminals to adaptively adjust their message transmission behavior based on real-time location information. Terminals determine whether to transmit P2X messages dynamically based on whether they are located in zones where vehicles are present, rather than using continuous transmission. This dynamic adaptation resolves the contradiction by maintaining reliable message delivery when needed while reducing power consumption when vehicles are absent.
Solution Approach 2:
The patent implements a feedback mechanism where pedestrian terminals receive location information from the base station and use this feedback to control their transmission behavior. The base station provides zone information and vehicle presence status, and the terminal uses this feedback to decide whether to transmit messages. This feedback loop ensures message delivery reliability when vehicles are present while reducing unnecessary transmissions when zones are clear, thereby balancing reliability and power consumption.
2Area of stationary object
If pedestrian terminals transmit P2X messages in all zones, then communication coverage is maximized, but resource conflicts and system load increase
Solution Approach 1:
The patent applies local quality by differentiating transmission requirements across different spatial zones. Instead of uniform transmission across all areas, the system identifies specific zones where vehicles are present and restricts message transmission to those localized areas. The base station provides zone-specific information, and terminals adjust their behavior based on their location within these zones. This localized approach maintains adequate coverage in areas where it is needed while reducing system load and resource conflicts in vehicle-free zones.
3Ease of operation
If semi-persistent scheduling is configured for all cells, then resource allocation is simplified, but resource waste occurs in secondary cells with low traffic
Solution Approach 1:
The patent applies segmentation by separating the treatment of primary cells and secondary cells regarding SPS configuration. Instead of uniformly configuring SPS across all cells, the system selectively applies SPS configuration only to the primary cell while leaving secondary cells without SPS configuration. This segmentation allows simplified resource allocation through SPS in the primary cell where it is most beneficial, while avoiding resource waste in secondary cells where traffic demands are lower and SPS would be less effective.
Data Source
AI summary
Disclosed are a communication technique for merging IoT technology with a 5G communication system for supporting a data transmission rate higher than that of a 4G system and a system thereof. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart, car or connected car, healthcare, digital education, retail, security, and safety related services, and the like) on the basis of 5G communication technology and IoT-related technology. A communication method and device in a V2X communication system are disclosed.