CoMP Backhaul Pre-Scheduling for Interference Coordination
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Solution Overview
Problem
In wireless communication networks, interference between base stations degrades performance on both downlink and uplink due to uncoordinated transmissions, leading to suboptimal resource allocation and increased interference, especially in scenarios where user equipment (UE) is subjected to dominant interference from neighboring base stations.
Innovation Solution
Implementing pre-scheduling decisions for transmit beams and power at one base station, which are then communicated to neighboring base stations to coordinate transmissions, allowing for coordinated scheduling and beamforming to mitigate interference and improve resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If base stations transmit data independently without coordination, then transmission speed is maintained, but interference between base stations increases and degrades performance
Solution Approach 1:
The patent applies preliminary action by having base stations exchange scheduling decision information before actual data transmission occurs. The first base station sends its scheduling decisions (including resource allocation, power levels, and beamforming vectors) to the second base station in advance, allowing the second base station to adjust its transmissions to avoid interference. This pre-coordination enables both base stations to maintain high transmission speeds while minimizing harmful interference through proactive planning.
Solution Approach 2:
The patent implements feedback mechanisms where base stations share scheduling decision information with each other. The second base station receives scheduling information from the first base station and provides feedback by adjusting its own scheduling decisions to coordinate with the first base station's transmissions. This feedback loop enables dynamic interference management while maintaining overall system throughput and transmission speed.
2Object-affected harmful factors
If base stations coordinate transmissions through information exchange, then interference is reduced, but system complexity increases
Solution Approach 1:
The patent extracts only the essential scheduling decision information needed for interference coordination between base stations, rather than exchanging complete system state data. By selectively sharing only the critical parameters (resource allocation, power levels, beamforming vectors), the system reduces interference effectively while minimizing the complexity overhead associated with information exchange and processing.
3Productivity
If pre-scheduling decisions are made and shared between base stations, then resource allocation efficiency improves, but processing time increases
Solution Approach 1:
The patent applies preliminary action by making and sharing scheduling decisions in advance before actual data transmission. This allows base stations to optimize resource allocation efficiently by planning ahead, while the advance timing of the information exchange minimizes the impact on overall system throughput and prevents significant processing time delays.
Data Source
AI summary
Certain aspects of the present disclosure relate to techniques for backhaul enhancements for cooperative multi-point (CoMP) operations. An aggressor node may take pre-scheduling decisions in advance of beamformed data transmissions based on the pre-scheduling decisions. The aggressor node may communicate the pre-scheduling decisions to one or more victim nodes, for example, via a backhaul link between the aggressor node and the one or more victim nodes. A victim node may take scheduling decisions based at least on the pre-scheduling decisions of the aggressor node to coordinate beamformed transmissions from the victim node with the beamformed transmissions from the aggressor node.