Transport technology of mobile internet service

engineer — Tue, 16 Feb 2010 16:06:28 +0000

Transport technology

Transport technology means technologies which utilize to carry out the traffic, mobile internet service traffic from mobile internet subscriber to internet gateway. Transport technology responsible to deliver huge traffic which should come from mobile internet service especially on 3G, EVDO and WIMAX services

Types of transport technologies

Telecommunication companies used to used optical fiber, SONET/SDH and satellite as the transport technologies to support high traffic utilization on mobile internet service. Optical fiber, SONET/SDH and satellite used to utilize to deliver the traffic on the core network

Optical Fiber

There are two types of optical fibers, single mode and multi mode fibers. Single mode has a small core rather than multi mode. Single mode fiber forces the light waves to stay on the same path/mode. Single mode fiber keeps the light going farther before they need to be amplified. Meanwhile multi mode fiber has much larger core than single mode. Multi mode fiber signal can not as far before they need to be amplified

SONET/SDH

Synchronous Digital Hierarchy (SDH) and Synchronous Optical Network (SONET) nodes are known as Add Drop Multiplexers (ADMs). SONET was developed at United Stated and SHD in European. SONET can deliver the packet up to 50 Mbps meanwhile SDH 150 Mps

Satellite

Telecommunication companies will utilize satellite technology for secondary link and will be delivered the traffic while primary link (optical fiber) goes down. There are two types of satellite technology, active and passive. A passive satellite only reflects received radio signals back to earth. An active satellite acts as a repeater; it amplifies signals received and then retransmits them back to earth.