V2X Node Selective Data Reception via V-RNTI Scrambling
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Solution Overview
Problem
Current LTE cellular network's broadcast function in V2X communication sends data to all users in a cell, leading to unnecessary data reception and processing for nodes outside the relevant area, such as emergency vehicle reminders being sent to all nodes in a cell, not just those in the affected direction.
Innovation Solution
A V2X communication method where a V2X node detects a downlink control channel scrambled with a V-RNTI relevant to its location, allowing it to selectively receive V2X data information on a corresponding downlink data channel, reducing unnecessary data processing and detection of channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broadcast manner is used to forward V2X data information to all users in the cell, then all V2X nodes can receive the data, but unnecessary data reception and processing occurs for nodes outside the relevant area
Solution Approach 1:
The cell coverage area is segmented into multiple geographic areas, each associated with a specific geographic area identifier. The eNB forwards V2X data information to multiple V-RNTIs corresponding to different geographic areas, and each V2X node only monitors and processes data for its own geographic area, thereby avoiding unnecessary data reception and processing while ensuring reliable delivery to all relevant nodes.
Solution Approach 2:
Different V2X nodes are assigned different geographic area identifiers based on their location. The system applies local quality by making each node's data reception and processing specific to its local geographic area rather than globally applicable to the entire cell, thus reducing unnecessary processing for nodes outside the relevant area.
2Reliability
If broadcast manner is used to forward V2X data information, then all V2X nodes receive the data, but the number of channels to be detected and processed increases
Solution Approach 1:
The cell coverage area is segmented into multiple geographic areas, each associated with a specific geographic area identifier. The eNB forwards V2X data information to multiple V-RNTIs corresponding to different geographic areas, and each V2X node only monitors and processes data for its own geographic area, thereby avoiding unnecessary data reception and processing while ensuring reliable delivery to all relevant nodes.
Solution Approach 2:
Different V2X nodes are assigned different geographic area identifiers based on their location. The system applies local quality by making each node's data reception and processing specific to its local geographic area rather than globally applicable to the entire cell, thus reducing unnecessary processing for nodes outside the relevant area.
3Reliability
If broadcast manner is used to forward V2X data information, then all V2X nodes receive the data, but signaling burden on the network increases
Solution Approach 1:
The cell coverage area is segmented into multiple geographic areas, each associated with a specific geographic area identifier. The eNB forwards V2X data information to multiple V-RNTIs corresponding to different geographic areas, and each V2X node only monitors and processes data for its own geographic area, thereby avoiding unnecessary data reception and processing while ensuring reliable delivery to all relevant nodes.
Solution Approach 2:
Different V2X nodes are assigned different geographic area identifiers based on their location. The system applies local quality by making each node's data reception and processing specific to its local geographic area rather than globally applicable to the entire cell, thus reducing unnecessary processing for nodes outside the relevant area.
Data Source
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AI summary
Embodiments of the present disclosure provide a V2X communication method and apparatus. The method is applicable for a V2X node and includes: detecting a downlink control channel whose CRC code is scrambled by a V-RNTI relevant to the V2X node; and receiving V2X data information on a corresponding downlink data channel according to an indication of the detected downlink control channel. In the present disclosure, the receiving V2X node is able to receive V2X data information selectively, which avoids useless data receiving and data processing operations of the receiving V2X node, reduces the number of downlink control channels and downlink data channels to be detected and processed by the receiving V2X node.