Promoting Freedom for Creative Architecture
Distributed Access Architecture (DAA) is a new network architecture that has emerged in recent years to replace the traditional cable access networks. It is a network architecture that separates the access network from the core network, allowing service providers to deploy service-specific software features and reduce network complexities while improving network performance and reliability. In this article, we will explore the key components and benefits of DAA.
DAA is a new network architecture that separates the access network from the core network. It utilizes a modular approach where each component of the network is designed to perform specific functions. The access network is made up of the Physical Network Interface (PNI), which connects to the Customer Premises Equipment (CPE), while the core network contains the aggregation routers, which provide interconnectivity between the access network and the service provider's core network. In DAA, the access network is distributed, meaning that it is decentralized and contains multiple nodes that provide services to subscribers.
There are several benefits of the DAA architecture, including improved network efficiency, lower latency, and reduced network complexity. Below are some of the key benefits of DAA:
DAA enables service providers to deploy service-specific software features in the access network, which improves network efficiency by reducing the amount of traffic that needs to traverse the network. Service providers can also deploy software features that improve bandwidth utilization, network security, and Quality of Service (QoS).
DAA reduces latency by moving network intelligence closer to the subscriber's premises. By deploying intelligent network components closer to the subscriber's premises, DAA reduces the distance that data needs to travel, which results in lower latency.
DAA reduces network complexity by decentralizing the access network. By distributing the access network, network administrators have more control over network resources, which results in improved network efficiency and reduced network complexity.
DAA has several components, including the Physical Network Interface (PNI), Network Nodes, and Aggregation Routers. Below is a description of each component:
PNI is the interface between the CPE and the access network. It is responsible for converting the analog signal from the CPE into a digital signal, which is then sent over the access network. PNI is also responsible for receiving the digital signal from the access network and converting it back into an analog signal that is then sent to the CPE.
Network Nodes are distributed throughout the access network and provide services to subscribers. They can perform functions such as routing, switching, and filtering. Network Nodes are designed to be modular and can be easily upgraded or replaced as needed.
Aggregation Routers are used to interconnect the access network and the service provider's core network. They provide the necessary interconnectivity and transport functions between the two networks.
DAA can be deployed using several architectures, including Remote PHY, Remote MAC/PHY, and Full Duplex DOCSIS (FDX). Below is a description of each architecture:
In the Remote PHY architecture, the physical layer (PHY) functions are moved from the headend to the Node. This architecture allows service providers to simplify the headend and improve network scalability.
The Remote MAC/PHY architecture moves both the PHY and Media Access Control (MAC) functions from the headend to the Node. This architecture provides even greater scalability and flexibility than Remote PHY.
FDX is a new network architecture that enables symmetrical Gigabit speeds over the existing Hybrid Fiber Coax (HFC) network. It uses a new modulation scheme, called Extended Spectrum DOCSIS (ESD), to double the amount of spectrum available for data transmission.
Distributed Access Architecture is a new network architecture that separates the access network from the core network. It provides several benefits, including improved network efficiency, lower latency, and reduced network complexity. DAA components include the Physical Network Interface (PNI), Network Nodes, and Aggregation Routers. DAA can be deployed using several architectures, including Remote PHY, Remote MAC/PHY, and Full Duplex DOCSIS (FDX). With the emergence of DAA, service providers can offer faster, more reliable, and more scalable services to their subscribers.
