Multi-Hop Relay IP Packet Routing Using WTRU Address Mapping
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Solution Overview
Problem
Existing communication systems in multi-hop relay environments face challenges in efficiently handling IP packets due to the lack of effective methods for identifying and routing them between relay devices and wireless transmit/receive units (WTRUs) based on IP addresses.
Innovation Solution
A method and apparatus for relay devices to exchange communication requests and accept messages with other relay devices and WTRUs, using identifiers and IP addresses to determine the appropriate forwarding of IP packets, ensuring they reach the intended destination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-hop relay environments are used to extend communication coverage, then coverage area is improved, but IP packet routing complexity increases due to lack of effective identification and routing methods
Solution Approach 1:
The patent introduces relay devices as intermediaries between WTRUs and the network. These relay devices receive communication requests, extract IP address information, and forward packets accordingly. The intermediary relays simplify the routing complexity by handling IP address extraction and forwarding decisions at intermediate nodes, allowing multi-hop coverage extension without proportionally increasing end-to-end routing complexity.
Solution Approach 2:
The patent segments the communication path into multiple independent hops through relay devices. Each relay device independently handles IP packet routing for its segment, extracting IP addresses and making forwarding decisions locally. This segmentation transforms a complex end-to-end routing problem into simpler local routing decisions at each relay node.
2Measurement precision
If relay devices forward IP packets based on IP addresses, then routing accuracy is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent implements preliminary action by extracting and storing IP address information during the communication request phase. Relay devices obtain IP addresses from communication requests, accept messages, or information elements before actual packet forwarding is needed. This pre-extraction of routing information simplifies subsequent packet forwarding operations, improving routing accuracy without requiring complex real-time processing.
3Reliability
If communication requests include detailed service information and identifiers, then communication reliability is improved, but message size and processing overhead increase
Solution Approach 1:
The patent extracts only the essential IP address information from communication requests and accept messages, separating this critical routing data from the full message content. Relay devices take out the IP address elements needed for forwarding decisions, ignoring or buffering the rest of the message. This extraction reduces processing overhead while maintaining the reliability needed for accurate packet routing.
Data Source
AI summary
Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for IP packet handling in multi-hop relay environments. A first relay device receives, from a wireless transmit/receive unit, WTRU, a first communication request comprising an identifier of the WTRU, information indicative of a service provided by an end relay device, and an identifier of the end relay device, transmits, to a second relay device, a second communication request comprising a first identifier of the first relay device and information indicative of the service provided by the end relay device, the identifier of the WTRU and the identifier of the end relay device, receives, from the second relay device, a first communication accept message comprising an identifier of the second relay device, the first identifier of the first relay device and information indicative of the service provided by the end relay device, the identifier of the WTRU and the identifier of the end relay device, transmits, to the WTRU, a second communication accept message comprising a second identifier of the first relay device, receives, from the WTRU or from the second relay device, a message including the identifier of the WTRU and information indicative of an IP address of the WTRU, receives an IP packet, and based on whether a source IP address or a destination IP address of the IP packet corresponds to the IP address of the WTRU, and forwards the IP packet to the second relay device or to the WTRU.