Cable-Tec Expo 2019

Getting Physical: Layer 1 Considerations for Extending Spectrum to 1.8 GHz and Using Legacy Modems in an FDX Plant (Room 228-230)

30 Sep 19
3:30 PM - 4:30 PM

Tracks: Wireline Networks: 10G and Beyond

Speaker(s): Shaul Shulman, Senior Architect, Strategy, Planning and Technology office, Connected Home Division, Intel Corporation; Ron Wolfe, Sr Director, Engineering, Outside Plant Architecture, Charter Communications, Advanced Engineering

Moderator(s): Doug Jones, Principal Architect, CableLabs;

With the increasing deployment of high bitrate services, including the industry's 10G initiative, there is increasing pressure on the physical layer of the network to create incremental capacity. Technologies such as full duplex DOCSIS (FDX) and the potential to extend DOCSIS to 1.8 GHz will require changes to the physical network. Charter will address the challenges of upgrading active and passive devices in the coaxial network to pass frequencies up to and beyond 1.8 GHz and will describe how the need for additional RF amplifiers will create new demands for power in the network. The impact of 1.8 GHz operation on remote PHY and remote MAC/PHY devices will also be explained. Intel will explain how FDX CMs and legacy CMs can share channels outside and inside the FDX band, enabling a more efficient use of spectrum and a gradual migration from legacy to FDX modems. This is enabled by upgrading legacy CM firmware to include the necessary MULPI features, making them “FDX-L” modems. The benefits and capabilities of FDX-L CMs will be analyzed a range of achievable performance of FDX-L CMs based on DOCSIS 3.1 requirements will be described.