Guard Symbol Reservation Signaling for Reliable IAB Switching
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Solution Overview
Problem
In Integrated Access and Backhaul (IAB) networks, the uncertainty in reserving guard symbols between IAB nodes leads to inaccurate data transmission switching operations due to the lack of an effective mechanism for symbol reservation.
Innovation Solution
A method for determining a first element set and sending request or indication information to reserve or not reserve guard symbols at transitions, using a first node and a second node, respectively, to improve the certainty and reliability of symbol reservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard symbols are reserved at transitions between first unit and second unit operations, then data transmission reliability is improved, but resource utilization efficiency deteriorates due to additional overhead symbols
Solution Approach 1:
The patent applies dynamics by making the guard symbol reservation flexible and adaptive rather than fixed. The network device dynamically determines whether to reserve guard symbols based on timing deviation conditions, and the IAB node dynamically adjusts its operation switching based on received indication information. This dynamic mechanism allows the system to optimize between reliability and resource efficiency in real-time based on actual network conditions.
Solution Approach 2:
The patent changes the parameter of guard symbol reservation from a fixed state to a variable state controlled by timing deviation thresholds. When timing deviation exceeds a threshold, guard symbols are reserved; when within threshold, they are not reserved. This parameter-based control enables the system to adapt resource allocation to actual synchronization conditions, resolving the contradiction between reliability and efficiency.
2Reliability
If an effective mechanism for symbol reservation is introduced, then symbol reservation certainty is improved, but system complexity increases due to additional signaling and determination procedures
Solution Approach 1:
The patent implements feedback by having the network device send indication information to the IAB node about whether guard symbols should be reserved. The IAB node receives this feedback and adjusts its operation switching accordingly. This feedback mechanism provides clear reservation certainty while keeping the complexity manageable by centralizing the determination logic in the network device.
Solution Approach 2:
The indication information acts as an intermediary between the network device's timing deviation assessment and the IAB node's operation switching decision. This intermediary simplifies the system by providing a clear signaling mechanism that bridges the gap between network control and node execution, reducing complexity compared to distributed decision-making approaches.
3Measurement precision
If timing deviation between first unit and second unit is compensated using guard symbols, then data transmission accuracy is improved, but time resource consumption increases due to additional guard symbols
Solution Approach 1:
The patent applies partial action by reserving guard symbols only when necessary - specifically when timing deviation exceeds a determined threshold. Instead of always reserving guard symbols (excessive action), the system selectively applies them only in cases where timing accuracy requires compensation, thus reducing unnecessary time resource consumption while maintaining transmission accuracy when needed.
Data Source
AI summary
Provided are a symbol reservation, inquiry, and notification methods, a first node, a second node and a medium. The method includes determining a first element set, and sending request information, where the request information is used for requesting to reserve or not reserve a guard symbol at a transition in a case where a second unit of the first node performs transmission or reception on elements in the first element set.