Wireless links are emerging as a superior alternative to the copper pair for the local loop in telephony. However, to provide for sufficient subscriber density with a reasonable bandwidth allocation, a micro-cellular architecture is a must. Further, the wireless local loop system is best interfaced as a remote access unit to an exchange. The V5.2 standard provides a convenient protocol for interfacing in this manner to all exchanges. © 1995 by the IETE.

Bhaskar Ramamurthi

Department of Electrical Engineering

Ashok Jhunjhunwala

Bandwidth

Cellular telephone systems

Copper

Frequency allocation

Network protocols

Radio links

Radio telephone

TELEPHONE EXCHANGES

Bandwidth Allocation

LOCAL LOOP

MICROCELLULAR ARCHITECTURE

Remote access

WIRELESS IN LOCAL LOOP

Radio systems

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Wireless in Local Loop: Some Key Issues

IETE Technical Review (Institution of Electronics and Telecommunication Engineers, India)

After decades of very modest growth, telecom in India has taken off. While liberalisation of telecom sector created the conditions, the key to this take off has been a conscious effort in India to drive down the capital expenditure (CAPEX) of telecom infrastructure which made telecom affordable to large sections of Indian people. This paper discusses the role that Indian and Chinese telecom companies have played towards this reduction of per-line CAPEX and identifies technologies still dominated by the West. Telecom is now set to grow rapidly and India would achieve 200 million connections in less than a decade. However, this optimist situation is still, pretty much confined to urban areas. It is the growth of telecom and Internet infrastructure in rural areas, that have much greater potential. But harnessing of this potential requires special efforts. This paper presents a glimpse of how this could be made possible. © 2003 Taylor & Francis Group, LLC.

Drivers of telecom in india

The traditional wired local loop used to connect each telephone subscriber to the nearest exchange is expensive and unreliable. Wireless Local Loop (WLL) systems largely eliminate these copper wires using wireless technologies and could provide a cost effective solution. corDECT is one such WLL system, based on the DECT (Digital Enhanced Cordless Telecommunications) standard, that provides toll-quality voice and data capability at a cost well below that of a wired local loop. A closed Queueing Network Model (QNM) is proposed for the corDECT system. The model is validated against actual measurements. Our model predicts that the 1,000-line corDECT system would meet a Busy Hour Call Attempt (BHCA) of 36,000 calls/hr, which is far greater than its requirement of 20,000 calls/hr. The bottlenecks that limit the BHCA to 36,000 calls/hr were identified by the model. We show how the system could be expanded to a 10,000-line exchange with a BHCA of over 2,10,000 calls/hr. We also investigate the feasibility of implementing 64 kbps data service along with voice. It is shown that this requires modest hardware improvements. © 2000 Taylor & Francis Group, LLC.

IETE Journal of Research

The performance of the cordect voice/data wireless local loop

Indian Journal of Science and Technology

Automation of wireless Telecom Node Commands of Network Management System

Who Was Who

Cruickshank, Herbert James, (12 July 1912–5 Aug. 1995), retired

IEEE Spectrum

ISDN reaches the market

IEEE Communications Magazine

ADSL: a new twisted-pair access to the information highway

Advances in Spatial Science Overcoming Isolation

Access to Telecommunication Networks: Regional Variations in Consumption Network Externalities

Wireless in local loop: Some key issues*

Journal	IETE Technical Review (Institution of Electronics and Telecommunication Engineers, India)
ISSN	02564602
Open Access	No