U2N Relay Connection Establishment via Pre-configured U2U Chains
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently establishing user equipment-to-network (U2N) relay connections, particularly for user equipment (UE) out-of-coverage of serving cells, due to high latency and message flooding issues in multi-hop relay discovery and selection processes.
Innovation Solution
The proposed solution involves an apparatus and method that determine a communication request for U2N relay connection establishment and provide it to a U2N relay UE via an established relay chain using U2U relay UEs. This approach minimizes broadcast and enables proactive relay selection using existing relay chains, reducing latency and message flooding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-hop relay discovery and selection processes are used for U2N relay connection establishment, then relay connections can be established for out-of-coverage UEs, but high latency and message flooding issues occur
Solution Approach 1:
The patent applies preliminary action by pre-establishing relay chains between U2U relay UEs before actual communication is needed. When a UE needs relay service, the pre-configured relay chains enable immediate connection establishment without performing discovery and selection procedures at that moment, thus reducing latency while maintaining reliable connection establishment.
2Reliability
If traditional multi-hop relay discovery and selection processes are used for U2N relay connection establishment, then relay connections can be established for out-of-coverage UEs, but message flooding issues occur
Solution Approach 1:
The patent extracts and eliminates the need for broadcast-based discovery messages by using pre-configured relay chains. Instead of flooding the network with discovery and selection messages, the system uses unicast communication over established relay paths, removing the harmful message flooding while preserving reliable relay connection establishment.
Solution Approach 2:
The patent introduces pre-configured relay chains as intermediaries that facilitate direct unicast communication between UEs and the network. These relay chains act as mediators that eliminate the need for extensive broadcast messaging, reducing message flooding while maintaining the ability to establish reliable connections for out-of-coverage UEs.
3Adaptability or versatility
If broadcast-based relay discovery is used, then relay selection can be performed, but network overhead and latency increase
Solution Approach 1:
The patent replaces the mechanical broadcast-based discovery system with an information-based unicast system using pre-configured relay chains. Instead of mechanically broadcasting discovery messages to all nodes, the system uses targeted unicast communication over established paths, reducing network overhead while maintaining relay selection capability through information exchange along the relay chain.
Data Source
AI summary
There is provided an apparatus comprising: means for determining a communication request associated with relay discovery and selection for a user equipment-to-network, U2N, relay connection establishment for a first user equipment, UE, and means for, based on the communication request, providing, to a U2N relay UE via at least one first user equipment-to-user equipment, U2U, relay UE, the communication request using an established relay chain between the U2N relay UE and a second UE via the at least one first U2U relay UE.