This considerably reduced the cost of implementing the UMTS network as many elements were in place or needed upgrading.
List Of Acronyms 1. Introduction Cellular Communication has become an important part of our daily life. Besides using cell phones for voice communication, we are now able to access the Internet, conduct monetary transactions, send text messages etc. However, the wireless medium has certain limitations over the wired medium such as open access, limited bandwidth and systems complexity.
These limitations make it difficult although possible to provide security features such as authentication, integrity and confidentiality.
The current generation of 3G networks have a packet switched core which is connected to external networks such as the Internet making it vulnerable to new types of attacks such as denial of service, viruses, worms etc. Back to Table Of Contents 2.
Generations Of Cellular Networks Cellular Networks have been around since the s and each year their subscribers increase at a very fast rate. First generation 1G networks were the first cellular networks introduced in the s.
They were only capable of transmitting voice at speeds of about 9. Both these technologies used analog modulation to transmit data as a continuously varying waveform. Second generation 2G cellular networks also known as personal communication services PCS introduced the concept of digital modulation meaning that voice was converted into digital code, and then into analog radio signals.
Being digital, they overcame certain limitations of 1G systems. Various 2G technologies have been deployed around the world. Although 2G systems were a great improvement from 1G, they were only used for voice communication. It is also known as data services over 2G.
There have been several deployments of 2. In Europe or places where GSM has been used, 2. The Third generation 3G standard is currently being pushed as the next global standard for cellular communications. It will provide services such as fast Internet surfing, advanced value added services and video telephony.
Deployments of this technology have already begun and several countries like Austria, Denmark, South Korea and Japan have adopted the 3G network architecture. There are three main technologies that are being applied. Although 3G has not been fully deployed, people have already started talking about the fourth generation 4G technology.
This generation will be designed to have data rates of up to 20Mbps. Although it was initially employed in Europe, it has become a global technology with subscribers in about countries. Its specifications were completed in and service began in Interested readers are encouraged to look at [Imai05] for more details.
However, some of the data services which are part of the 2. Transfer of messages between cell phones. Large messages are truncated and sent as multiple messages.
This was the first attempt at providing data at high speeds data over GSM, with speeds of up to kbps. This technique cannot support large bursts of data. This technique can support large bursty data transfers. In order to support this two new elements have to be added to existing networks.
Edge uses 8-PSK modulation. CDPD is a packet based data service. CDPD is able to detect idle voice channels and uses them to transfer data traffic without affecting voice communications. The International Telecommunication Union ITC started the process inthe result of this effort was a new network infrastructure called International mobile telecommunications IMT-with the signifying that this new technology will be available inwill have data rates of up to Kbps and will be in the MHz frequency range.
The following is the list of objectives that IMT aims to receive [Balderas04], To make a wide range of services, both voice and data available to users, irrespective of location.
To provide services over a wide coverage area. To provide the best quality of service QoS possible. To extend the number of services provided subject to constraints like radio transmission, spectrum efficiency and system economics.shaping tomorrow with you The Benefits of Cloud-RAN Architecture in Mobile Network Expansion.
The Lifecycle of a Revolution. In the early days of the public internet, we believed that we were helping build something totally new, a world that would leave behind the shackles of age, of race, of gender, of class, even of law.
Security of 3G and LTE. As a response to the security issues faced by 3G, a new security architecture was developed for Long Term Evolution (LTE). Public Land Mobile Network (PLMN. 1).
Network Security. Cyberoam UTM and NGFW appliances, available as hardware and virtual security platforms, offer next-generation security to SOHO, SMBs and Enterprise. The first commercial United States 3G network was by Monet Mobile Networks, In addition to the 3G network infrastructure security, end-to-end security is offered when application frameworks such as IMS are accessed, although this is not strictly a 3G property.
UMTS Networks: Architecture, Mobility and Services [Heikki Kaaranen, Ari Ahtiainen, Lauri Laitinen, Siamäk Naghian, Valtteri Niemi] on schwenkreis.com *FREE* shipping on qualifying offers. Building on the success of the first edition, UMTS Networkssecond edition allows readers to continue their journey throughUMTS up to the latest 3GPP standardization phase.