DSLAM Time-Slicing for Broadband Service Differentiation
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Solution Overview
Problem
Current broadband network implementations face suboptimal resource utilization due to the need for separate DSLAMs for business and residential services, leading to undersubscription of business class and limited ability to offer guaranteed performance tiers to residential subscribers.
Innovation Solution
Implementing a time-slicing technique that divides aggregate uplink bandwidth into time slots, reserving specific slots for each subscriber, and simulating oversubscription to ensure fair and flexible resource allocation based on QoS characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate DSLAMs are used for business and residential services, then service quality and performance guarantees are improved, but network resource utilization deteriorates due to undersubscription of business class and limited ability to offer guaranteed performance tiers to residential subscribers
Solution Approach 1:
The patent merges business class and residential class services onto a single DSLAM platform, eliminating the need for separate dedicated devices. This consolidation allows the system to serve both service types simultaneously while maintaining their respective quality requirements through software-based service differentiation rather than hardware separation.
Solution Approach 2:
The DSLAM is designed with multi-functionality to handle both business and residential services. The device incorporates service differentiation capabilities that allow it to provide guaranteed performance tiers for business customers while also serving residential subscribers, making a single device universal for multiple service types.
2Productivity
If a single DSLAM serves both business and residential subscribers, then network resource utilization is improved, but the ability to guarantee performance and differentiate service tiers deteriorates
Solution Approach 1:
The patent segments service differentiation into distinct classes within the single DSLAM. It divides subscribers into business class and residential class groups, applying different service policies, performance guarantees, and quality of service parameters to each segment. This segmentation allows performance guarantees to be maintained for business customers while enabling broader resource utilization.
Solution Approach 2:
The system applies local quality by providing different service characteristics to different subscriber groups. Business class subscribers receive guaranteed performance tiers and quality assurances, while residential subscribers receive best-effort service. Each subscriber group experiences service quality tailored to its specific needs within the same physical infrastructure.
3Adaptability or versatility
If QoS priorities are set to offer differing performance tiers, then service differentiation is improved, but control over per-subscriber throughput guarantee and uplink oversubscription level deteriorates
Solution Approach 1:
The patent implements dynamic service differentiation that adapts to individual subscriber needs and network conditions. Rather than static QoS priorities, the system dynamically adjusts service parameters, performance guarantees, and resource allocation based on subscriber class, traffic patterns, and available capacity. This dynamic approach provides both service differentiation and operational control.
Solution Approach 2:
The system changes multiple service parameters simultaneously to achieve both differentiation and control. It adjusts performance guarantee levels, throughput limits, quality of service classes, and resource allocation parameters in a coordinated manner. This multi-parameter control allows the system to offer service differentiation while maintaining explicit control over per-subscriber throughput guarantees and uplink oversubscription levels.
Data Source
AI summary
Novel solutions to provide enhanced configurability of network access. Such solutions can provide, inter alia, enhanced utilization of network resources (including without limitation network aggregation devices, such as DSLAMs and the like). In an aspect of some solutions, a network aggregation device can divide an aggregate uplink bandwidth into a plurality of time slots. Some or all of the time slots can be reserved for different customers (subscribers). In another aspect of some embodiments, the time slots can be allocated in such a way as to simulate oversubscription of the aggregate uplink bandwidth.