Wireless Routing Path Switching for Conditional IAB Re-Routing
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Solution Overview
Problem
In wireless communication systems, particularly in IAB networks, routing paths may become improper, necessitating a switching mechanism to ensure efficient packet delivery.
Innovation Solution
A method and apparatus for routing path switching in wireless communication systems, involving the reception of configuration for first and second routing IDs, transmission of PDUs via respective paths, and constructing PDUs with headers for path switching when conditions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single routing path is used for packet transmission, then the routing configuration is simple, but the system cannot adapt when the routing path becomes improper, leading to packet delivery failures
Solution Approach 1:
The system pre-configures multiple routing paths (first routing path with first routing ID, second routing path with second routing ID) before packet transmission is needed. When the primary path becomes improper, the wireless device can immediately switch to the pre-configured alternative path without complex real-time routing calculations, thus achieving adaptability while maintaining configuration simplicity.
Solution Approach 2:
The system changes the routing ID parameter from a single fixed value to multiple configurable values (first routing ID, second routing ID). This parameter change enables the system to select different routing paths based on transmission conditions, improving adaptability while the parameters themselves remain manageable through configuration messages.
2Reliability
If routing path switching is implemented without conditions, then the system can respond quickly to path failures, but unnecessary path switching occurs increasing packet delay and reducing transmission efficiency
Solution Approach 1:
The system implements conditional routing path switching based on feedback about the state of the current routing path. The wireless device monitors whether the first routing path is proper or improper, and only switches to the second routing path when the condition (first path is improper) is satisfied. This feedback mechanism ensures switching occurs only when necessary, maintaining reliability while avoiding unnecessary delays from premature or frequent switching.
3Reliability
If multiple routing paths are configured and monitored, then the system can ensure reliable packet delivery, but the complexity of routing management and path selection increases
Solution Approach 1:
The wireless device performs autonomous routing path selection and switching based on pre-configured parameters and simple condition evaluation. The device independently determines whether to use the first or second routing path by evaluating whether the first path is proper, without requiring complex centralized routing management. This self-service approach ensures reliable packet delivery through multiple configured paths while keeping the management complexity low at the device level.
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; transmitting, to the destination node, a first protocol data unit (PDU) via the first routing path related to the first routing ID; and based on that a condition to switch a routing path is satisfied: constructing a second PDU so that a header of the second PDU includes information for a routing path switch to the second routing path; and transmitting, to the destination node, the second PDU including the header via the second routing path related to the second routing ID.