Wideband Cable Modem Provisioning for Upstream Bandwidth
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Solution Overview
Problem
The existing cable television infrastructure, primarily designed for entertainment and communication, faces challenges in providing sufficient upstream bandwidth to support applications like peer-to-peer computing, file sharing, and gaming, due to its legacy architecture and asymmetrical modulation schemes.
Innovation Solution
A wideband cable system is implemented, enabling provisioning servers and cable modems to configure for wideband service by using configuration files and dynamic service messages, allowing for increased upstream bandwidth through channel bonding and efficient data distribution across multiple channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If legacy cable television infrastructure is used for data transmission, then downstream bandwidth is sufficient, but upstream bandwidth is limited due to asymmetrical modulation schemes and shared channel architecture
Solution Approach 1:
The patent combines multiple downstream channels into a wideband downstream channel and pairs them with multiple upstream channels to create a wideband upstream channel. This merging of channels increases the total bandwidth available for upstream data transmission while maintaining compatibility with existing cable infrastructure. The system aggregates bandwidth from separate channels to provide sufficient upstream capacity for modern applications.
2Adaptability or versatility
If multiple modulation schemes are supported for upstream and downstream transmission, then data transmission flexibility is improved, but physical layer complexity increases
Solution Approach 1:
The patent segments the data transmission system into distinct wideband downstream and wideband upstream channels with dedicated modulation schemes. By separating upstream and downstream transmissions into distinct channels, the system can optimize each channel's modulation parameters independently, reducing the overall complexity of managing multiple modulation schemes across a single shared medium.
3Productivity
If upstream bandwidth is increased to support peer-to-peer computing and file sharing, then application performance is improved, but existing shared channel arbitration protocols become insufficient
Solution Approach 1:
The patent implements dynamic channel allocation where the cable modem termination system (CMTS) dynamically assigns upstream channels to cable modems based on real-time traffic conditions and requirements. This dynamic approach replaces static arbitration protocols with adaptive channel assignment, allowing the system to optimize bandwidth distribution for applications like peer-to-peer computing and file sharing while managing channel access more efficiently.
Data Source
AI summary
A provisioning server has a port to receive a request for a network address including an indication that a remote device is wideband capable. The provisioning server also has a processor to respond to the request with a network address and include an address for a configuration file and to provide a configuration file that allows wideband service. A cable modem has a port to request a network address and indicate wideband capability. The cable modem also has a processor to receive a response to that request that includes a network address and an address for a configuration file. The processor also receives a configuration file and allows the cable modem to be configured for wideband service.