▀ ASN Mobility Management
▄ Cisco ASR 5000 Series Product Overview
ASN Mobility Management
The Access Service Network Gateway (ASN Gateway) processes subscriber control and bearer data traffic, and
supports connection and mobility management across cell sites and inter-service provider network boundaries. An ASN
Gateway is a logical entity in the Access Service Network (ASN) of a WiMAX radio access network and interfaces
directly with base transceiver station or base station via an R6 GRE reference interface. An ASN Gateway performs
control plane functions, bearer plane routing or bridging functions, resident functions in the connectivity service
network, or a function in another ASN.
The ASN Gateway is placed at the edge of an ASN and is the link to the CSN. Each ASN Gateway can concentrate
traffic from multiple radio base stations. This reduces the number of devices to manage and minimizes connection set-
up latency by decreasing the number of call handovers in the network.
Figure 35. Basic ASN Gateway Network
Connectivity Service
Network (CSN)
ASN Gateway
Acess Service Network (ASN)
WiMAX SS/MS
WiMAX Base
Station
To support Mobile IP and/or Proxy Mobile IP data applications, you can configure the system to perform the role of the
ASN Gateway/foreign agent and/or the home agent within the connectivity service network (CSN) of your WiMAX
data network. When functioning as a home agent, the system can be located within your WiMAX network or in the
CSN of an external enterprise or ISP network. In either case, the ASN Gateway/foreign agent terminates the mobile
subscriber‘s call session and then routes the subscriber‘s data to and from the appropriate home agent.
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