Changes

'''Access Service network(ASN)''': The ASN coordinates traffic across multiple Base Transceiver Stations (BTS) and supports security, handoffs and Quality of Service (QoS).

* The ASN interfaces the BTS and the all-IP core network—the CSN. Typically the ASN includes numerous BTSs with one or more ASN gateways.

* The ASN manages radio resources, MS access, mobility, security and QoS. It acts as a relay for the CSN for IP address allocation and AAA functions.

[[Image:ASN.jpg|center|1500 px|thumbnail|<font size = "3">'''WiMAX Network Reference Model '''</font>]]

{|border="2" cellspacing="0" cellpadding="4" width="78% " align="center"

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|align = "justify"|Interface between the MS and the ASN

|align = "justify"|Air interface

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|align = "justify"|Interface between the MS and the CSN

|align = "justify"|AAA (Authentication, Authorization, & Accounting ), IP host configuration, mobility management

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|align = "justify"|Interface between the ASN and the CSN

|align = "justify"|AAA, policy enforcement, mobility management

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|align = "justify"|Interface between the ASNs

|align = "justify"|Mobility management

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|align = "justify"|Interface between the CSNs

|align = "justify"|Internetworking,roaming

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|align = "justify"|Interface between BTS and ASN gateways

|align = "justify"|IP tunnel management to establish and release MS connection

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|align = "justify"|Interface between the BTSs

|align = "justify"|Handoffs