You are browsing the archive for GSM.

Avatar of support

by support

Interoperability and global roaming in UMTS & GSM

Mar 14, 2012 at 4:20 am in 3G, GSM by support · Leave a Comment »

Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular technology for networks based on the GSM standard. Developed by the 3GPP (3rd Generation Partnership Project).

UMTS phones (and data cards) are highly portable—they have been designed to roam easily onto other UMTS networks (if the providers have roaming agreements in place). In addition, almost all UMTS phones are UMTS/GSM dual-mode devices, so if a UMTS phone travels outside of UMTS coverage during a call the call may be transparently  [read more →]

Avatar of support

by support

How pricing dynamics affect mobile usage

Sep 2, 2011 at 3:46 pm in Telephony by support · Leave a Comment »

2011-09-01-mou-eppm-2010[1]

Total global mobile voice minutes reached an estimated 1.6 trillion in 2010, a figure some ten times greater than the corresponding amount in 2001. This means that the actual usage of mobiles has grown almost twice as fast as the number of connections, which grew from around 950 million to 5.4 billion over the same nine year period. This is equivalent to an increase from three to five hours of call time per user per month across the world, and  [read more →]

Avatar of Shri

by Shri

Diameter Protocol – an Overview

Aug 8, 2011 at 4:49 am in LTE by Shri · Leave a Comment »

Diameter is an AAA (Authentication, Authorization and Accounting) protocol initially developed by IETF for the applications such as network access and IP mobility. It is a base foundation protocol to provide AAA services like Delivery of AVPs (attribute value pairs), Negotiation Capabilities, Routing Capabilities and Error Handling to new access technologies.

Authentication, Authorization and Accounting (AAA) protocols such as TACACS and RADIUS were initially deployed to provide dial-up PPP and terminal server access.  Over a time, with  [read more →]

Avatar of Shri

by Shri

GSM: Physical & logical Channels

Aug 1, 2011 at 9:21 am in GSM by Shri · 3 Comments »

Multiframes-in-GSM

GSM: PHYSICAL AND LOGICAL CHANNELS

GSM uses a mix of Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA). FDMA parts involves the division by frequency of the 25 MHz bandwidth in to 124 carrier frequencies (Also called ARFCN) spaced 200 KHz for GSM-900. For GSM-1800 frequency spectrum of 75 MHz bandwidth is divided in to 374 carrier frequencies spaced 200 KHz. TDMA further divides each carrier frequencies in to 8 time slots such that each carrier frequency is  [read more →]

Avatar of %s

by LT Writer

Tata Teleservices to merge CDMA & GSM divisions, cut jobs

Jul 28, 2011 at 3:20 am in News by LT Writer · Leave a Comment »

The telecom unit of theTata Group has decided to combine two businesses that provide mobile services using different technologies, raising fears of job cuts in an industry marked by low tariffs and falling profits.

In a circular issued on Sunday, Tata Teleservices announced in what it described as the “unification” of two divisions offering services based onCDMA and GSM, two rival technologies.

“This restructuring may drive efficiencies but cou! ld end up making job positions redundant. Our estimate is 15% of the  [read more →]

Avatar of %s

by LT Writer

DoT may allow telecom spectrum sharing to overcome shortage

Jul 26, 2011 at 3:45 am in News by LT Writer · Leave a Comment »

 After dilly-dallying for a long time, the government is likely to allow sharing of spectrum among telecom operators, a move that would help overcome the shortage of spectrum that has affected the quality of mobile services badly.

This would also help smaller operators with fewer subscribers to earn revenues by way of sharing spectrum lying vacant with them.

A high-level team will hold a crucial meeting tomorrow to consider the proposal, which says, “For efficient utilization of spectrum, spectrum sharing among the  [read more →]

Avatar of support

by support

Bharti Airtel announces new organisation structure for its India and South Asia operations

Jul 11, 2011 at 5:24 am in News by support · Leave a Comment »

Bharti Airtel logo

New structure to drive the next phase of company’s growth

  • Creation of B2C and B2B business verticals for enhanced business efficiency and employee value
  • Transformation from a ‘technology’ facing organisation structure to a ‘customer’ facing one
  • Will provide enhanced empowerment to employees

Bharti Airtel,  announced a new organization structure for its operations in India and South Asia. The new structure, which will be effective starting August 1, 2011, is aimed at driving greater business and functional synergies, providing a common interface to customers,  [read more →]

Avatar of support

by support

Bharti takes tower sharing to Africa

Jun 13, 2011 at 3:31 pm in News by support · Leave a Comment »

Bharti Airtel, which acquired Zain Telecom’s assets in 16 African countries last year, has started discussions with all its key competitors on the continent – including MTN, Vodacom, Orange, Millicom and Etisalat – for sharing tower infrastructure and back-end optic fibre networks. The idea is to reduce capital investments and improve profitability.

“The industry cost structure in Africa should be optimised. We are having collaborative discussions with our competitors. They are eager to share tower and fibre infrastructure so  [read more →]

Avatar of support

by support

Top-level changes at Bharti group

at 2:30 pm in News by support · Leave a Comment »

Mr Mukesh Bhavnani has been appointed as the Group General Counsel and Company Secretary of Bharti Enterprises, the parent company of Bharti Airtel. He will take over this responsibility from Ms Vijaya Sampath effective June 2.

Mr Bhavnani has moved from Essar Group where he was Group President – Legal. He has around 30 years of varied experience spanning across multiple industries including insurance, infrastructure, media, and consumer goods. In his last assignment, Mr Bhavnani was responsible for the  [read more →]

Avatar of support

by support

Vodafone Essar launches 3G services in Karnal, Kurukshetra

at 1:25 pm in News by support · Leave a Comment »

Cellular service provider-Vodafone Essar today announced the roll-out of its 3G services in Karnal and Kurukshetra. Vodafone 3G mobile and data services will offer its customers a faster, smarter and better mobile experience with internet access at speeds up to 21.1 Mbps at their finger tips.

Vodafone 3G services were first introduced in Panipat and Ambala in Haryana. As a part of the second phase, the services are being rolled out in Karnal and Kurukshetra. Subsequently, it would be  [read more →]