V2X WLAN Discovery Latency Reduction via Network-Assisted WBSS Registration
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Solution Overview
Problem
Current WLAN direct discovery and communication procedures in V2X scenarios are not efficient enough to warn of dangers in time, particularly in urgent situations requiring fast action, due to latency issues in signaling scenarios.
Innovation Solution
The implementation of new procedures for LTE EPC support for faster V2X WLAN discovery and communication over DSRC/802.11p channels, including a V2X WBSS services registration procedure and ProSe Function support for announcements, reduces latency by using network-assisted discovery and communication methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional WLAN direct discovery and communication procedures are used in V2X scenarios, then devices can establish communication without authentication, but the latency in discovery and joining communication groups is too high for urgent safety warnings
Solution Approach 1:
The network performs preliminary actions by pre-authorizing V2X devices and pre-configuring WBSS parameters before actual V2X communication is needed. The MME stores V2X authorization information and the network maintains pre-established WBSS configurations, allowing devices to immediately join communication groups without traditional authentication delays when safety events occur.
Solution Approach 2:
The MME and network infrastructure act as intermediaries that facilitate rapid V2X device discovery and WBSS joining. Instead of direct device-to-device discovery which takes time, the network intermediary provides pre-authenticated device lists and WBSS configuration information, enabling immediate communication establishment for safety warnings.
2Loss of time
If network assistance is added to V2X discovery procedures, then latency is reduced, but the system complexity increases
Solution Approach 1:
V2X devices perform self-service by autonomously retrieving pre-configured WBSS parameters and authorization information from the network without requiring complex multi-step authentication protocols. The devices use stored V2X credentials to automatically join authorized communication groups, simplifying the overall process while maintaining rapid response times.
Solution Approach 2:
The system changes key parameters by transitioning from dynamic authentication parameters to pre-configured static WBSS parameters for authorized V2X devices. This parameter change from dynamic to static configuration reduces the complexity of discovery procedures while maintaining network control and security.
Data Source
AI summary
The discovery and establishment of communication groups is described for wireless vehicular communications. Some embodiments include receiving a registration request from a user equipment (UE) in a vehicular environment to provide services over a wireless access in vehicular environments (WAVE) basic service set (WBSS) in wireless channels 5 at a vehicular proximity services (ProSe) function, deciding at the ProSe function to authorize registration of the UE to provide services over the WBSS, and sending a registration response from the ProSe function confirming WBSS information to be used for the services after deciding to authorize the UE.