Roaming UE Relay Discovery With Interest-Based Routing Selection
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Solution Overview
Problem
Existing UE-to-UE (U2U) relay discovery protocols in 5G networks are inadequate as they fail to account for unilateral communication interests and connectivity between remote UEs, leading to inefficient relay selection and potential flooding issues.
Innovation Solution
Implementing a dual discovery scheme that includes a connectivity-based approach, where relay UEs announce their connectivity, and an interest-based approach, where relays rebroadcast end-to-end link interests, to ensure accurate relay selection and minimize flooding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing U2U relay discovery protocols are used, then relay selection can be performed, but communication efficiency deteriorates due to lack of consideration for unilateral interests and connectivity
Solution Approach 1:
The patent applies preliminary action by having UEs pre-announce their connectivity status and communication interests before actual relay selection occurs. Remote UEs broadcast their connectivity information to potential relays in advance, and relays that match their interest criteria are pre-identified, preventing unnecessary communication attempts and improving overall system efficiency.
Solution Approach 2:
The patent implements feedback mechanisms where relays provide responses indicating their ability to satisfy remote UE interests based on announced connectivity information. This feedback loop allows remote UEs to refine their relay selection decisions, ensuring that only compatible relays are selected and reducing wasted communication resources.
2Loss of information
If relay UEs broadcast all connectivity information, then complete network topology is achieved, but network flooding increases
Solution Approach 1:
The patent applies local quality by having relays selectively broadcast only the specific connectivity information that matches their announced interests, rather than broadcasting all possible connectivity data. Each relay filters and transmits only relevant information, maintaining completeness for interested parties while significantly reducing overall network traffic and preventing flooding.
3Ease of operation
If relay selection is performed without interest matching, then connection establishment is simplified, but communication relevance deteriorates
Solution Approach 1:
The patent introduces an interest-matching intermediary mechanism where relays act as mediators that verify compatibility between their capabilities and remote UE requirements before establishing connections. This intermediary step ensures that only relevant communications are established, maintaining both ease of operation through automated matching and high reliability through interest verification.
Data Source
AI summary
The present application relates to improving a roaming service. In an example, a method includes a remote user equipment (UE) receiving a discovery message from a relay UE, the discovery message indicating an ability to serve as the relay UE for the first remote UE to reach a second remote UE. The remote UE can determine whether to select the relay UE to relay a message to the second remote UE based on the discovery message. The remote UE can select the relay UE to reach the second remote UE based on the determination.