V2X Unicast Transmission via Layer-2 ID Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting V2X data, particularly in establishing efficient unicast transmissions to specific terminals after broadcast transmissions, which can lead to wasted resources and ineffective data delivery.
Innovation Solution
A method involving a Direct Communication Request message broadcasted by a first UE, allowing interested UEs to respond with a Direct Communication Accept message, using the source Layer-2 ID for unicast data transmission, thereby optimizing PC5 transmission for V2X services without conventional signaling and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional signaling and resource allocation methods are used for establishing unicast transmissions after broadcast, then compatibility with existing systems is maintained, but resource waste occurs and data delivery efficiency deteriorates
Solution Approach 1:
The patent extracts and eliminates the conventional signaling overhead (RRC connection setup, resource allocation requests, and grants) from the unicast transmission establishment process. By directly using the source Layer-2 ID from the broadcast message as the destination ID for unicast responses, the system removes unnecessary signaling steps while maintaining reliable data delivery to specific UEs.
Solution Approach 2:
The broadcast message预先 includes the source Layer-2 ID that will be used as the destination ID for unicast communications. This preliminary inclusion of identification information allows receiving UEs to immediately establish unicast responses without requiring additional signaling exchanges, thus improving data delivery efficiency and reducing resource consumption.
2Reliability
If detailed signaling procedures are implemented for unicast transmission establishment, then transmission reliability is improved, but system complexity and overhead increase
Solution Approach 1:
The source Layer-2 ID in the broadcast message serves multiple functions: it identifies the transmitting UE for the broadcast and simultaneously serves as the destination ID for unicast responses. This multi-functionality eliminates the need for separate signaling procedures to establish unicast connections, reducing signaling complexity while maintaining transmission reliability through direct addressing.
3Speed
If conventional resource allocation procedures are followed, then resource management control is maintained, but transmission speed and efficiency decrease
Solution Approach 1:
The patent skips the conventional multi-step resource allocation procedure (resource request, grant allocation, confirmation) by enabling UEs to directly transmit unicast responses using the resource indicators provided in the broadcast message. This rushing through of the essential transmission step while maintaining necessary resource control improves transmission speed and overall resource allocation efficiency.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for transmitting, by a first user equipment (UE), V2X data to a second UE in a wireless communication system, the method comprising: broadcasting, by the first UE, a Direct Communication Request message; receiving, in a unicast manner, a Direct Communication Accept message from the second UE receiving the Direct Communication Request message; and transmitting data of a V2X service to the second UE in a unicast manner, wherein the source Layer-2 identity (ID) included in the broadcast Direct Communication Request message is used as a destination Layer-2 ID of the Direct Communication Accept message for unicast reception of the data of the V2X service by the second UE, is disclosed.