Inter-PLMN Direct Communication Using Limited Resource Authorization
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Solution Overview
Problem
Existing methods for device-to-device communications between UEs attached to different Public Land Mobile Networks (PLMNs) suffer from high latency and lack of flexibility, particularly in vehicle-to-everything (V2X) applications, due to long latency in discovery and configuration procedures and limitations of roaming-based solutions.
Innovation Solution
A communication method that enables direct communication between network elements attached to different PLMNs by provisioning special authorizations for limited use of PLMN-A's licensed spectrum, allowing HARQ feedback and resource pool access, facilitated by application-level information and network coordination, eliminating the need for core network routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional discovery and PC5 link establishment procedures are used between UEs attached to different PLMNs, then communication can be established, but latency becomes very long
Solution Approach 1:
The patent applies preliminary action by pre-configuring UEs with allowed PLMN lists and discovery parameters before actual communication is needed. This pre-configuration enables UEs to directly access authorized PLMNs without undergoing full discovery and authorization procedures during communication establishment, significantly reducing latency while maintaining reliable inter-PLMN communication.
2Area of stationary object
If roaming-based solutions are used to provide V2X service across geographical areas, then service coverage is extended, but flexibility is reduced and deployment restrictions occur
Solution Approach 1:
The patent implements universality by enabling UEs to access multiple PLMNs simultaneously through pre-configured allowed PLMN lists. Instead of being restricted to a single home PLMN or requiring complex roaming agreements, UEs can universally access any authorized PLMN for V2X communications, providing both broad coverage and high flexibility.
3Area of stationary object
If inter-operator roaming is implemented at the border of coverage areas, then service availability is extended, but latency increases and service interruptions occur
Solution Approach 1:
The patent uses the allowed PLMN list configuration as an intermediary mechanism that pre-establishes communication pathways between UEs and authorized PLMNs. This intermediary configuration eliminates the need for real-time roaming negotiation and handover procedures at network borders, thereby reducing latency and preventing service interruptions while maintaining broad service availability.
Data Source
AI summary
The disclosure relates to a communication method between a first network element attached to a first public land mobile network and a second network element attached to a second public land mobile network, the second network element not being attached to the first public land mobile network, the method comprising at least one element of the following list: initiating a provisioning of an authorization for the second network element to access a specific network resource of the first public land mobile network, wherein the authorization only enables the second network element to access said specific network resource for a specific use related to a communication with the first network element,-provisioning, at the first public land mobile network, the authorization to the second network element, and-accessing, at the second network element, the specific network resource of the first public land mobile network for the specific use.