Connector Node Backhaul Optimization for Low Power Cells
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Solution Overview
Problem
In wireless cellular networks with high picocell density, the backhaul capacity is often constrained due to time-varying wireless channels, shared resource allocation, interference, and lack of dedicated links, leading to inefficient resource allocation and potential service limitations.
Innovation Solution
A system and method where a connector node determines and allocates backhaul capacity among low power cells based on demand and assigned rates, optimizing power and rate allocation to maximize picocell utility, exploiting characteristics of the time-varying wireless channel and adapting to changing user traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless backhaul is used to connect multiple picocells, then deployment cost is reduced, but backhaul capacity becomes constrained due to shared wireless channel
Solution Approach 1:
The system dynamically allocates backhaul capacity to picocells based on time-varying channel conditions and traffic demands. The connector node continuously adjusts rate allocations and power levels to adapt to changing wireless channel quality, ensuring optimal utilization of the shared backhaul resource while meeting service requirements.
Solution Approach 2:
The connector node changes transmission parameters including power allocation and data rates for each picocell based on channel conditions and demand. By adjusting these parameters dynamically, the system optimizes the trade-off between backhaul capacity utilization and service quality across multiple picocells.
2Quantity of substance
If dedicated backhaul links are provided to each picocell, then backhaul capacity is sufficient, but deployment cost increases significantly
Solution Approach 1:
The system merges multiple picocell backhaul connections through a single connector node that shares the wireless backhaul channel. Instead of providing separate dedicated links to each picocell, the connector node consolidates access to the backhaul network, reducing deployment cost while managing capacity through dynamic resource allocation.
Solution Approach 2:
The connector node serves multiple picocells simultaneously, providing a universal access point to the backhaul network. This multi-functional node handles capacity management, scheduling, and resource allocation for multiple picocells, replacing the need for individual dedicated backhaul infrastructure at each picocell.
3Adaptability or versatility
If more picocells are deployed to improve coverage and capacity, then network coverage improves, but backhaul resource contention increases
Solution Approach 1:
The connector node implements feedback mechanisms to monitor channel conditions, traffic demands, and resource utilization across multiple picocells. Based on this feedback, the system adjusts power allocation, rate assignments, and scheduling decisions to maintain reliable backhaul service even as the number of connected picocells increases.
Solution Approach 2:
The system performs preliminary resource allocation and scheduling decisions based on predicted traffic patterns and channel conditions. By proactively managing backhaul resources before contention occurs, the system prevents resource exhaustion and maintains service reliability as more picocells are added to the network.
Data Source
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AI summary
Various embodiments provide for systems and methods of backhaul optimization. An exemplary system comprises a plurality of low power cells and a connector node. The connector node may be in communication with the plurality of low power cells. The connector node may be configured to receive demands from each of the plurality of low power cells. Each of the demands may indicate a demand at a predetermined time. The connector node may be further configured to determine a rate for each of the plurality of low power cells based on the demands of each of the low power cells and the assigned rate of the other of the plurality of low power cells. T he connector node may be further configured to allocate capacity based on the determined rates.