IAB Node Pre-emptive Resource Request for Latency Reduction
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Solution Overview
Problem
Current Integrated Access and Backhaul (IAB) systems in 5G communication networks experience significant latency due to the need for nodes to request resources only after receiving data, leading to accumulated delays in multi-hop networks.
Innovation Solution
A second network node is introduced that can pre-emptively request resources from a third network node based on scheduling requests or buffer status reports received from a first network node, allowing data transmission to proceed before the data is received, thereby reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If nodes request resources only after receiving data in IAB systems, then resource allocation follows standard procedures, but scheduling latency accumulates significantly in multi-hop networks
Solution Approach 1:
The patent applies preliminary action by enabling the second network node to transmit resource requests to the third network node before actually receiving data from the first network node. The second node uses scheduling requests (SR) or buffer status reports (BSR) received from the first node to trigger advance resource allocation requests, thereby eliminating waiting time and reducing scheduling latency in the multi-hop IAB network.
2Productivity
If nodes wait to receive data before requesting resources, then resource requests are based on actual data needs, but transmission delays accumulate across multiple hops
Solution Approach 1:
The invention enables the second network node to perform preliminary resource allocation requests based on scheduling requests or buffer status reports from the first node, before the actual data arrives. This preliminary action allows the third node to have resources ready when data arrives at the second node, eliminating sequential waiting delays and improving overall transmission efficiency in the IAB network.
Data Source
AI summary
A second network node in a wireless communication system includes a transceiver and at least one processor configured to control the transceiver to receive, from a first network node, at least one of a first scheduling request (SR) or a first buffer status report (BSR); control the transceiver to transmit, to a third network node, at least one of a second SR or a second BSR based on the first SR or the first BSR before receiving data to be transmitted corresponding to the first SR or the first BSR from the first network node; control the transceiver to receive, from the third network node, a first uplink (UL) grant corresponding to the second SR or the second BSR; control the transceiver to receive the data from the first network node; and control the transceiver to transmit the data to the third network node.