- Cell Tower Connectivity
Point-to-Point Connectivity For GSM/CDMA/3G Networks
A typical GSM/CDMA/3G network contains a Base Station Subsystem consisting of Base Station Controller (BSC) and a Base Transceiver Station (BTS). The Base Station Controller (BSC) is responsible for handling traffic between a cellular phone and the Mobile services Switching Center (MSC). This is the last stage of the network just before the final consumer. Therefore, a Telco can greatly expand its network to reach more customers at a lower cost by using a wireless link for this part.
A wireless component usually comes in where there is no wired line feasibility between the BSC and BTS due to physical or other reasons. However, even when this is not the case, replacing the conventional T1/E1 line with wireless eliminates an annually recurring cost. Wireless can also complement an existing leased line as a backup link or as a quick upgrade of the link to provide more bandwidth. There are two ways it can do this, either by using a point-to-point link or a point-to-multipoint link depending on whether bandwidth or reach is the main criteria.
Diagram of a typical Cellular Network
Point-to-Point Connectivity between BSC and BTS
For high bandwidth on critical BSC to BTS links, backhauls can be used together with a pair of E1/T1-to-Ethernet Converters. The backhaul link replaces an existing leased E1/T1 line.
Point-to-point connectivity between the BSC and BTS
smartBridges offers two high performance backhauls that are ideally suited for carrying voice: the airHaul Nexus PRO TOTAL (25 Mbps with a built-in multi-band antenna) and the airHaul2 Nexus PRO (a dual radio model which delivers 45 Mbps in a link aggregation mode). The specific airHaul model can be selected based on the throughput requirement for the link between the BTS and BSC.
Point-to-Multipoint Connectivity between BSC and BTS
In a cellular network, a single BSC usually manages three BTS. When the bandwidth requirement for each BTS is within the limit of 6 Mbps, the Telco can establish a point-to-multipoint connectivity for connecting wirelessly to these BTS. In this scenario, the smartBridges access point, airPoint, is used at the BSC end and the client device, airClient, is used at the BTS end.
Point-to-multipoint connectivity between the BSC and multiple BTS
Click here to read about a successful deployment combining wireless and GSM networks.
Click here to read a white paper which explains the factors involved in adding a wireless component to a GSM/3G/CDMA network.
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