Multi-hop UE Relay Discovery in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently discovering and establishing multi-hop UE-to-Network Relay connections, which are essential for providing reliable and efficient data communication services, especially in scenarios where direct communication with the network is not feasible.
Innovation Solution
The method involves a second relay UE receiving a U2N Relay discovery message from a first relay UE, which includes the User Info ID of the first relay UE, a Layer-2 ID of a third relay UE, and the ID of the serving cell of the third relay UE. The second relay UE then transmits a U2N Relay discovery message to a remote UE, including its own User Info ID, the Layer-2 ID, and the serving cell ID, thereby facilitating the discovery and establishment of multi-hop relay connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-hop relay discovery is implemented to extend network coverage, then coverage area is improved, but system complexity increases
Solution Approach 1:
The patent segments the relay discovery process into distinct phases: direct relay discovery (single hop) and multi-hop relay discovery. Each phase uses specific message types and procedures, allowing the system to handle different coverage scenarios with appropriate complexity levels rather than implementing a monolithic complex discovery mechanism.
Solution Approach 2:
The patent introduces intermediate relay UEs that act as mediators between remote UEs and the network. These intermediate relays forward discovery messages and establish multi-hop connections, effectively extending coverage while managing complexity through hierarchical relay structures rather than requiring all UEs to directly discover all possible relays.
2Measurement precision
If relay discovery messages include detailed information (User Info ID, Layer-2 ID, serving cell ID), then discovery accuracy is improved, but message overhead increases
Solution Approach 1:
The patent applies local quality by including different levels of information detail in different message types and at different stages of the discovery process. For example, initial discovery messages may include essential identifiers, while subsequent messages or messages in specific scenarios include additional detailed information only when necessary, optimizing the balance between accuracy and overhead.
3Reliability
If multiple relay hops are supported, then communication reliability is improved, but discovery time increases
Solution Approach 1:
The patent implements preliminary action by having relay UEs pre-configure and advertise their relay capabilities and parameters before actual communication needs arise. Remote UEs can perform discovery operations in parallel across multiple potential relay paths, and the network can pre-establish relay configurations, reducing the time required when multi-hop connections need to be formed.
Data Source
AI summary
A method and device for UE-to-Network (U2N) Relay discovery are disclosed. In one embodiment, a second relay UE receives a first U2N Relay discovery message from a first relay UE, wherein the first U2N Relay discovery message includes a User Info Identity (ID) of the first relay UE, a Layer-2 ID of a third relay UE, and an ID of a serving cell of the third relay UE. Furthermore, the second relay UE transmits a second U2N Relay discovery message to a remote UE, wherein the second U2N Relay discovery message includes a User Info ID of the second relay UE, the Layer-2 ID, and the ID of the serving cell.