|
Definition
A gateway is a network element that acts as an entrance point to another
network. An access gateway is a gateway between the telephony network and other
networks, such as the Internet.
Overview
Access mediation supports the arbitration of call control and signaling between
individual networks, resources, users, and services. Access mediation is the next
evolutionary step for the advanced intelligent network (AIN). With the growing
importance of the Internet, access gateways are a critical component of access
mediation. This tutorial presents several application scenarios that utilize an
access gateway point between the traditional telephone network and the Internet.
First, the tutorial will review general background information on access mediation.
As part of this overview, specific information on the important components of
access gateways will be addressed. Access gateway-application scenarios will also
be discussed. Finally, the tutorial will present several elements of network design
that are crucial for a network to support an access gateway. Overview
of Access Mediation and
Access Gateways
As
stated in the tutorial overview, access mediation supports the arbitration of
call control and signaling. The key mediation functions to be managed and controlled
include privacy, security, message routing, message screening,
message parameter
screening, bridging and protocol conversion, performance monitoring and protection,
error handling, and billing. The goal of access mediation is to enable the interconnection
of individual networks.As shown in Figure 1, access mediation can be created with
a mediation point in the signaling network. The networks that are interconnected
can be any service provider's wireline, wireless, long-distance, or Internet network.
Signaling
messages must be able to pass freely within and between these networks.
The networks can vary by standards definition, protocol, and vendor or service
provider implementation. Even where standards and protocol match, offered services
may vary by availability and implementation. Advanced services may be obtained
from a network different from the one providing basic service to subscribers.
For each of these cases, several issues must be resolved in order to enable the
interconnection of the networks. Access
Gateway Example
As an important application
area of access mediation, access gateways allow networks based on different signaling
protocols to be interconnected. For example, telephone company mergers have created
the need to interconnect
networks based on different signaling standards.
Wireless networks based on GSM must now interconnect with networks based on IS–41.
The access gateway provides the protocol conversion needed to interconnect these
networks. In addition, providers are using TCP/IP networks in place of SS7 for
certain signaling (see Figure 3). In Figure 3, a TCP/IP–based network interconnects
two distant IS–41–based wireless networks. The TCP/IP–based network
is used to transport short messages between the two wireless networks. Since the
short messages are not time-critical, the TCP/IP network is utilized to interconnect
the distant networks which is a cost-efficient solution.
You may also like this : Sniffer for detecting lost mobiles, Mobile Phone Cloning, Nano Cars Into The Robotics , Mind-Reading Computer, Intelligent Speed Adaptation , Global Wireless E-Voting , E-Cash Payment System , Cyborgs, Brain Fingerprinting , Biometrics in SECURE e-transaction , X- Internet , Surface Computer, Green Cloud , Digital Jewelry , Brain Gate , Palm Vein Technology , 5 Pen PC Technology , iDEN , Hi-Fi, Packet Sniffers, Brain Chips , Phishing , Pill Camera, Blue Brain , Biometric Voting System , 3D Television , 3D password, Gi-Fi , Graphical Password Authentication, 4G Broadband , Finger Tracking , Eye Movement-Based Human Computer Interaction Techniques , Ethical Hacking, Secure ATM by Image Processing , Dynamic Languages ,In-Vehicle Networking , Plastic Memory , Protein Memory , Setting up a LAN using Linux , UMTS , Money Pad, The Future Wallet , Low Power UART Design , SPECT , Buffer overflow attack , Hurd , Intel Centrino Mobile Technology , MPEG Video Compression , Survivable Networks Systems , Self Organizing Maps , Mobile IP,IT Seminar Reports, PPT and PDF.
|
<<back |
