Packet Duplication Routing for Robust IAB Wireless Delivery
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Solution Overview
Problem
Existing wireless communication systems, particularly in IAB networks, face challenges in enhancing packet delivery robustness and reducing packet delay due to reliance on single routing paths, which can be exacerbated by issues in primary routing paths.
Innovation Solution
Implementing a method and apparatus for packet duplication by constructing a second PDU with a header containing packet duplication information and a payload from a first PDU, transmitting the first PDU via a first routing path and the second PDU via a second routing path to enhance robustness and reduce delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single routing path is used for packet transmission, then the device complexity is reduced, but the packet delivery robustness deteriorates
Solution Approach 1:
The patent segments the routing path into multiple independent routes (first routing path and second routing path). By dividing the single routing path into multiple segments, the system can transmit packets through different routes, thereby improving packet delivery robustness when one path fails while maintaining manageable device complexity through structured routing configuration.
Solution Approach 2:
The patent changes the routing parameter from a single path to multiple paths by introducing a routing indicator in the packet header. This parameter change enables the receiving device to identify and process packets from different routing paths, improving delivery robustness without significantly increasing device complexity through standardized handling procedures.
2Reliability
If packet duplication is performed, then the packet delivery robustness is improved, but the use of energy increases
Solution Approach 1:
The patent creates a copy of the packet and transmits it through an alternative routing path when the primary path fails. This copying mechanism improves packet delivery robustness by ensuring at least one copy reaches the destination, while energy consumption is managed by only duplicating packets when necessary rather than continuously.
Solution Approach 2:
The patent implements dynamic packet duplication based on real-time routing conditions. The system monitors the status of the primary routing path and only activates packet duplication when path failure is detected, making the energy consumption adaptive to actual network conditions rather than static and continuous.
3Reliability
If multiple routing paths are configured, then the packet delivery robustness is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a routing indicator as an intermediary element in the packet header that manages multiple routing paths. This intermediary simplifies the complexity by providing a standardized mechanism for identifying and handling packets from different paths, allowing the system to manage multiple routing paths without proportionally increasing device complexity.
Data Source
AI summary
A method performed by a wireless device in a wireless communication system includes: receiving a configuration for a first routing identity (ID) and a second routing ID, wherein the first routing ID is related to a first routing path towards a destination node, and the second routing ID is related to a second routing path towards the destination node; receiving a first protocol data unit (PDU); based on that a condition to perform a packet duplication is satisfied, constructing a second PDU so that a header of the second PDU includes information related to the packet duplication and the second PDU includes a payload of the first PDU; transmitting, to the destination node, the first PDU via the first routing path related to the first routing ID; and transmitting, to the destination node, the second PDU including the header via the second routing path related to the second routing ID.