Upstream Resource Pool for Dynamic Channel Allocation
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Solution Overview
Problem
Current cable modem termination systems face challenges in dynamically allocating upstream channel resources among radiofrequency domains due to static configuration and unforeseen traffic growth patterns, leading to inefficient bandwidth utilization and the need for manual cabling changes for temporary bandwidth increases.
Innovation Solution
An upstream resource pool is defined, allowing eligible radiofrequency domains to request additional channels based on current traffic demands, with channels configured as fixed or floating, where floating channels become operational upon resource allocation and are prioritized for allocation, enabling dynamic load balancing and on-demand channel addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static configuration of upstream channels is used, then system simplicity is maintained, but adaptability to traffic demand changes deteriorates
Solution Approach 1:
The patent implements dynamic channel allocation by transitioning from static configuration to a system where RF domains can dynamically request and receive upstream channels from a shared pool based on real-time traffic demands. The CMTS automatically manages channel assignment and reallocation, enabling the system to adapt to changing bandwidth requirements without manual reconfiguration.
Solution Approach 2:
The patent changes the parameter of channel allocation from fixed/static to dynamic/variable. By introducing an upstream channel pool and allowing RF domains to request channels based on current traffic conditions, the system transforms the channel allocation parameter from a static configuration value to a dynamically adjusted resource distribution mechanism.
2Productivity
If manual cabling changes are performed for temporary bandwidth increases, then bandwidth capacity is increased, but operational complexity and time consumption increase
Solution Approach 1:
The patent replaces the mechanical process of physical cabling changes with a software-based virtual channel allocation mechanism. Instead of physically modifying the cable infrastructure to accommodate temporary bandwidth increases, the system uses virtual channel assignment and resource pooling to dynamically allocate bandwidth, eliminating the need for manual cabling operations.
Solution Approach 2:
The system enables self-service channel allocation where RF domains automatically request channels from the upstream pool based on their traffic demands, and the CMTS automatically processes these requests and assigns appropriate channels. This eliminates the need for manual intervention in channel allocation, even for temporary bandwidth increases.
3Adaptability or versatility
If additional upstream channels are added for temporary conditions, then bandwidth capacity is increased, but resource utilization efficiency deteriorates due to indefinite holding
Solution Approach 1:
The patent implements periodic review and reallocation of upstream channels from the pool to RF domains based on ongoing traffic condition assessments. The system continuously monitors bandwidth usage patterns and periodically adjusts channel assignments, allowing temporary channel additions to be revoked when no longer needed, thus preventing indefinite resource holding.
Solution Approach 2:
The system incorporates feedback mechanisms where traffic conditions are continuously monitored and used to adjust channel allocation decisions. RF domains provide feedback on their actual bandwidth needs, and the CMTS uses this information to dynamically reallocate channels from the upstream pool, ensuring resources are not held indefinitely but are reallocated based on actual demand.
4Adaptability or versatility
If pre-assigned fixed number of channels per RF domain is used, then configuration simplicity is maintained, but flexibility for different traffic patterns deteriorates
Solution Approach 1:
The patent segments the upstream channel resources into a shared pool and individual RF domain allocations. Instead of assigning a fixed number of channels to each RF domain, the system creates a segmented model where channels are pooled and then dynamically allocated to domains as needed, allowing flexibility while maintaining a simplified configuration approach.
Solution Approach 2:
The upstream channel pool serves multiple RF domains universally, allowing any domain to access channels from the shared resource base. This universal pool mechanism provides multi-functionality by accommodating different traffic patterns across various domains without requiring domain-specific fixed configurations, while the overall system remains easy to operate through automated management.
Data Source
AI summary
In one embodiment, an “upstream resource pool” may be defined, such that certain upstream resources may be utilized, or not, depending on current traffic demands. Such a pool may include a specified number of available upstream channels. A universe of “eligible” RF domains may be associated with the pool. To provide additional capacity when traffic demands warrant it, an eligible RF domain may be enabled to request one or more upstream channels from the pool. A channel may be requested for a specified duration, or for an unspecified period of time.