Integrated Access Backhaul Link Scheduling for Interference Reduction
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Solution Overview
Problem
Current wireless communication networks face inefficiencies in spectrum utilization and network throughput due to the separate allocation of transmission resources for access and backhaul links, leading to potential interference and suboptimal resource utilization.
Innovation Solution
An integrated access and backhaul (IAB) system that allows the access link and backhaul link to share the same transmission resources, with a macro base station opportunistically rescheduling these resources based on interference thresholds to minimize interference and maximize network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If separate transmission resources are allocated for access link and backhaul link, then interference between links is avoided, but spectrum utilization and network throughput are reduced
Solution Approach 1:
The patent merges the resource allocation for access link and backhaul link into a unified scheduling framework. The macro base station schedules both access link traffic (between macro base station and pico base stations) and backhaul link traffic (between pico base stations and user equipment) using the same transmission resources, thereby improving spectrum utilization while managing interference through coordinated scheduling decisions.
Solution Approach 2:
The patent implements dynamic resource allocation where the macro base station can flexibly assign transmission resources to either access link or backhaul link based on real-time network conditions, traffic demands, and interference levels. This dynamic scheduling allows the system to adaptively optimize spectrum utilization while maintaining acceptable interference levels through opportunistic resource sharing.
2Productivity
If the same transmission resource is shared by access link and backhaul link, then spectrum utilization is improved, but interference between links increases
Solution Approach 1:
The patent incorporates feedback mechanisms where the macro base station monitors interference levels resulting from opportunistic access link transmissions on backhaul resources. Based on this feedback, the scheduler adjusts future resource allocations to maintain interference below acceptable thresholds while maximizing spectrum utilization. The system learns from past interference patterns to optimize future scheduling decisions.
Solution Approach 2:
The patent changes the scheduling parameters dynamically based on network conditions. The macro base station adjusts transmission power, time slot allocation, and frequency resource assignment for opportunistic access link traffic depending on the measured interference impact on backhaul communications. This parameter adaptation allows the system to exploit available spectrum while controlling harmful interference through real-time optimization.
Data Source
AI summary
A method, an apparatus, and a computer program product for wireless communication are provided in which a scheduling entity determines a first direction of a backhaul link traffic between a first scheduling entity and a second scheduling entity, and determines a second direction of an access link traffic between the scheduling entity and a user equipment (UE) based on the first direction of the backhaul link traffic to reduce potential interference caused by the access link traffic. The scheduling entity transmits or receives the access link traffic in the second direction utilizing at least one of a same transmission resource of the backhaul link traffic. Other aspects, embodiments, and features are also claimed and described.