WTRU Relay Switching for Low-Delay Direct Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in enabling direct communication between WTRUs that are not within direct communication range, necessitating the use of relay WTRUs to facilitate data exchange.
Innovation Solution
A method is disclosed where a WTRU can request a change of relay by transmitting a link modification request message to a target WTRU via a first relay WTRU, receive a link modification accept message, and then establish direct communication with a second relay WTRU, allowing for efficient relay switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a relay WTRU is used to enable communication between WTRUs that are not within direct communication range, then communication capability is improved, but communication efficiency and transmission delay deteriorate
Solution Approach 1:
The patent implements dynamic relay selection where the source WTRU can switch between different relay WTRUs based on communication conditions. The system transitions from static relay assignment to dynamic relay selection, allowing the communication path to adapt to changing network conditions, thereby improving communication efficiency while maintaining the ability to communicate beyond direct range.
Solution Approach 2:
The patent employs multiple relay WTRUs as temporary communication intermediaries rather than relying on a single long-term relay. The source WTRU can discover and select from multiple available relays, using each relay only for the duration needed to establish or maintain optimal communication, thus improving overall system efficiency and reliability.
2Adaptability or versatility
If a relay WTRU is used to enable communication between WTRUs that are not within direct communication range, then communication capability is improved, but transmission delay increases
Solution Approach 1:
The patent performs preliminary relay discovery and link establishment before actual data transmission is needed. The source WTRU discovers available relay WTRUs and pre-establishes communication links, so that when data needs to be transmitted, the path is already prepared, minimizing transmission delay while maintaining extended communication capability.
Solution Approach 2:
The system dynamically selects relays based on current communication conditions, choosing the fastest available path rather than using a fixed relay. This dynamic selection allows the system to minimize transmission delay by adapting to real-time network conditions while maintaining the ability to communicate beyond direct range.
3Productivity
If relay switching is implemented to improve communication efficiency, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service relay selection where the source WTRU autonomously discovers relay WTRUs, evaluates their suitability, and selects the best relay without requiring complex centralized control. This distributed decision-making approach improves communication efficiency while avoiding the complexity of centralized relay management systems.
Solution Approach 2:
The patent uses standardized signaling messages as intermediaries to facilitate relay selection and switching. These standardized messages (relay discovery messages, relay selection requests, etc.) simplify the interaction between WTRUs and relay WTRUs, reducing system complexity while enabling efficient relay switching functionality.
4Adaptability or versatility
If direct communication is attempted between WTRUs outside direct communication range, then communication capability is maintained, but communication fails
Solution Approach 1:
The patent introduces relay WTRUs as intermediaries between source and target WTRUs that are outside direct communication range. The relay WTRU forwards communication messages between the two WTRUs, enabling communication capability to be extended beyond direct range while maintaining reliable communication through the intermediary relay node.
Data Source
AI summary
Methods, apparatuses, systems, etc., directed to performing a change of relay are disclosed herein. In an embodiment, a WTRU may transmit a link modification request message to a target WTRU via a first relay WTRU for requesting a change of relay. The WTRU may receive a link modification accept message from the target WTRU via the first relay WTRU, indicating a (e.g., proposed) second relay WTRU (e.g., identifier). The WTRU may transmit a direct communication request message including the second relay WTRU identifier for indicating to the target WTRU acceptance of the proposed second relay WTRU. The WTRU may a receiving a direct communication accept message from the target WTRU via the second relay WTRU, indicating the traffic may be relayed via the second relay WTRU.