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Mobile WiMAX ASN Gateway Solution


AN1 WiMAX ASN-GW

Airspan WiMAX ASN GatewayThe IEEE 802.16e-2005 standard together with the WiMAX Forum Network Reference Model (NRM) calls for the ability to manage subscriber mobility at a number of layers as well as to authenticate, account and apply policy on a per subscriber basis. This is achieved by dividing the WiMAX network into two main parts:

* Access Service Network (ASN) and
* Connectivity Service Network (CSN)

an1_wimax

 

The ASN consists of the WiMAX base stations and the ASN Gateway (ASNGW). Whereas, the CSN is at the core of the network providing control and management functions such as IMS, DHCP, FTP and AAA.

A key element of the ASN is the ASNGW, which controls and aggregates the traffic from a large number of WiMAX base stations. An IEEE 802.16e-2005 compliant network may be deployed without an ASN-GW providing the wireless access network is used for fixed and nomadic applications only.

The AN1 platform provides an ideal entry level footprint for distributed coverage WiMAX applications with a modest number of subscribers and data throughput requirements. As opposed to centralised capacity applications for large established network installations, a distributed coverage architecture offers a cost effective choice for applications such as, rural networks, picocell applications, small municipalities, hotzones, and even Smart Grid.

In many low density emerging market applications, backhaul is potentially a major expense. It is advantageous to flatten the network by deploying the AN1, functioning as an Access Service Node (ASN) Gateway, at the radio site or in a regional switching location creating a distributed architecture for deployment of a wide variety of applications in emerging markets.

The AN1 platform is an ideal subscriber mobility gateway for Mobile WiMAX radio access networks. The ASN Gateway and Home Agent (HA) functions deployed on an AN1 are designed to support connection and mobility management across cell sites through processing of subscriber control and bearer data traffic. The ASN Gateway serves as the Extensible Authentication Protocol (EAP) authenticator and mobility key holder for subscriber connections and RADIUS client to attached AAA servers. The HA is a router on a mobile node’s home networks that maintains information about the device’s current location, as identified in its care-of-address.

Each ASN Gateway can concentrate traffic from multiple radio base stations, which reduces the required number of devices under management and AAA transactions while minimising connection setup latency by decreasing the number of call hand-offs in the network

Key Features and Benefits

* Full ASN Gateway and HA functionality
* Robust throughput, call transaction rates, packet processing, and memory providing a highly efficient and effective core network in a small form factor
* Full suite of mobility management capabilities, including CMIP and PMIP v4/v6
* Subscriber and network intelligence typically only found on capacity platforms with deep packet inspection and application-based routing for In-line Services
* Rugged, carrier grade design meets NEBS/ETSI requirements plus stateful software recovery
 



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