Generic Access Network - Seminar Reports|PPT|PDF|DOC|Presentation

Generic Access Network (GAN) is a telecommunication system which extends mobile services voice, data and IP Multimedia Subsystem/Session Initiation Protocol (IMS/SIP) applications over IP access networks.This report will attempt to discuss the details of the GAN, its evolution, its services, architecture, and  other implications.

The Generic Access Network (GAN) is an evolving wireless communications system in which mobile phone sets function seamlessly between local area networks (LANs) and wide-area networks (WANs). Using GAN technology, a cell phone subscriber can communicate by voice, data and multimedia. As GAN technology is implemented, cellular telephone subscribers can expect improved coverage, the ability to use a single phone set for all their voice communications and perhaps cheaper rates with a single bill for Internet and voice communications.


For the Carriers :

1)     Instead of erecting expensive base stations to cover every nook and cranny of a neighbourhood, GAN allows carriers to add coverage using low cost 802.11 access points. When at home, subscribers have very good coverage.

2)     In addition, GAN relieves congestion on the GSM or UMTS spectrum by removing common types of calls and routing them to the operator via the relatively low cost Internet

3)     GAN makes sense for network operators that also offer internet services. Operators can leverage sales of one to promote the other, and can bill both to each customer.

4)     Some other operators also run networks of 802.11 hotspots, such as T-Mobile. They will be able to leverage these hotspots to create more capacity and better coverage in many populous areas.

5)     Subscribers, not the network, pay directly for much of the costs associated with the service. They pay for a connection to the Internet, effectively paying the expensive part of the cost of routing calls from their location.

For the Subscribers :

1)     Subscribers do not rely on their operator's ability to roll out towers and coverage, allowing them to fix some types of coverage blackspot themselves (such as in the home or office.)

2)     The cheaper rates for 802.11 use, coupled with better coverage at home, make it more affordable and practical to use cellphones instead of land lines.

3)     GAN is currently the only commercial technology available that combines GSM and 802.11 into a service that uses a single number, a single handset, single set of services and a single phone directory for all calls.

1)     Handsets must support 802.11 network access which requires additional space, power and complexity and may affect the size, weight and battery performance of the phone.Increasingly, consumers take advantage of unlimited or otherwise high-volume data tariffs to make VoIP calls via SIP, as with Skype.

2)     GAN will mean that this type of usage is more likely to be charged on a per-minute or unit basis as with voice calls, which may increase the cost of mobile calls made over IP.