In more detail the network architecture shown in figure 19:

Figure 19 - the Elements of the WiMAX network.

User terminal or Mobile Station, MS, or Subscriber Station SS - a device providing a connection between the user equipment (e.g., a computer) and the network. MS may be a CPE, Customer Premises Equipment that connects to a network of multiple computers.

Base Station BS, the base station is a logical network element that handles the physical and MAC levels according to the standard 802.16. BS represents one sector with one frequency. BS can connect to multiple ASN GW to provide redundancy and/or load balancing. One natural product may include multiple BS (logical objects).

ASN-GW, the gateway radiopacity is a logical network element that performs the aggregation (consolidation) of the signal functions, and, if necessary, routing data streams of users. ASN-GW may be associated with other ASN-GW to provide redundancy and load balancing.

AAA server, Authentication, Authorisation, Accounting, - device (server) that performs the procedure:

- user authentication, i.e., authenticate and access the network

- authorization - dedicated network resources in accordance with the services to which he signed

- account - counting of resources utilized by the user (amount of time or amount of data transferred) to bill for the use of the network.

MIP HA - Mobile IP Home Agent. It is used to support mobility, bankernas in CSN, see Chapter "mobility". He is typically an edge router - a router-gateway, located on the border of the WiMAX network and external networks.

IMS, Content services, Billing Support System (BSS), Operator Support System (OSS) is a standard system that is not specific to WiMAX, provide support functions to the operator.

Roaming is the ability to provide subscriber services while in a foreign network (visited network). The subscriber can use the services defined in the agreement between home network and foreign network. The main advantage of roaming is a large area of provision of services with a single invoice.

Key features SI3000 Light ASN:

Infrastructure with the lowest cost based on commercial routers

- Available mobile services

- Available fixed communications services

- Compatibility with future regenumvaluea guarantee investment protection

- Interaction SI3000 ASN-GW

4.3 WiMAX Solutions with advanced features and performance.

Figure 20 - architecture of the WiMAX network with advanced features

Effective WiMAX solution with advanced features and performance

To achieve higher energy potential of the communication line (link budget), reduce the signal attenuation and the best coating of micro-spots (micro-spot), can be used various technologies explode.

Note: Iskratel supports both technologies: STC/MRC currently and MIMO with its platforms 16e. Profitable business model of WiMAX with higher coverage of users, user satisfaction and improve the power potentials of the communication lines (link budget) WiMAX can be achieved with the use of advanced antenna technologies (MIMO and AAS): MIMO A/B & STC: the Effect of MIMO A/B lies in its ability to switch between A MIMO and MIMO B.