Master Base Station Scheduling for Heterogeneous Network Interference
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Solution Overview
Problem
In heterogeneous networks, the lack of user scheduling information exchange between base stations leads to unpredictable interference conditions, resulting in significant interference between cells and reduced throughput in mobile communication systems.
Innovation Solution
A method where a master base station receives a downlink interference indicator from a serving slave base station, determines if a user equipment is in a high interference region, and allocates fewer resources that may interfere with the UE, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same frequency is used in the same macro cell to increase cell density and system capacity, then coverage and system capacity are improved, but interference from neighboring cells increases
Solution Approach 1:
The patent applies local quality by differentiating resource allocation strategies for different users based on their specific interference conditions. Users experiencing high interference from neighboring cells receive different resource allocation treatments compared to users in low-interference regions, optimizing system capacity while managing interference locally for each user equipment
Solution Approach 2:
The patent changes the parameter of resource allocation by introducing interference indicators (such as CQI, RI, PMI) to dynamically adjust the scheduling decisions. The base station modifies resource allocation parameters based on feedback about interference conditions, allowing the system to adaptively balance capacity and interference
2Device complexity
If user scheduling information is not exchanged between base stations, then implementation is simpler, but interference conditions become unpredictable and throughput decreases
Solution Approach 1:
The patent implements a feedback mechanism where user equipment measures interference conditions and sends scheduling information (CQI, RI, PMI) back to the serving base station. This feedback loop enables the base station to make informed scheduling decisions without requiring complex inter-base-station coordination, maintaining simplicity while improving throughput through better interference awareness
Solution Approach 2:
The user equipment performs self-service by autonomously measuring interference conditions and generating scheduling feedback information. This eliminates the need for complex centralized coordination between base stations, as each UE independently assesses its interference environment and provides necessary information to its serving base station for local scheduling optimization
Data Source
AI summary
The present invention provides a user scheduling method, a master base station, a user equipment, and a heterogeneous network. The method includes: receiving, by a master base station, a downlink interference indicator DII forwarded by a serving slave base station serving a user equipment UE, where the DII is sent to the serving slave base station by the UE attached to the serving slave base station, and when the DII is greater than a preset threshold, the DII indicates that the UE is in a high DII region; determining, according to the DII, whether the UE is in a high DII region; and if the UE is in a high DII region, allocating, when performing scheduling, fewer resources that may interfere with the UE.