Projects / Programmes source: ARIS

Multichannel SHDSL - E1 transmission system

Research activity

Code Science Field Subfield
2.08.00  Engineering sciences and technologies  Telecommunications   

Code Science Field
T180  Technological sciences  Telecommunication engineering 
telecommunications, symmetrical data transmission, digital subscriber loop, symmetrical high-speed digital subscriber loop - SHDSL, E1 interface, V5.1 interface, V5.2 interface, ATM interface, inverse multiplexing - IMA, digital subscriber loop access multiplexer - DSLAM, GSM, UMTS, 3G wireless mobile systems.
Evaluation (rules)
source: COBISS
Researchers (5)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  21195  Dušan Banko  Telecommunications  Researcher  2002 
2.  06819  MSc Miran Globevnik  Electric devices  Researcher  2002  58 
3.  15196  PhD Aleš Klemenčič  Computer science and informatics  Researcher  2002  22 
4.  16265  PhD Radovan Sernec  Systems and cybernetics  Head  2002  83 
5.  21194  Vili Šivec  Telecommunications  Researcher  2002 
The aim of Single-pair High-speed Digital Subscriber Loop - SHDSL is to enable the high speed data transfer or simultaneous data and voice transfer by fully exploiting current copper wire infrastructure, used for transmission of telephone conversations. SHDSL standard (G.991.2) was approved in February 2001 by ITU and enables simultaneous data transfer on a single copper pair of wires in both directions with different data rates up to 2300 kbps and reach up to 4 km. SHDSL significantly broadens the types and improves the quality of services that users can expect from current copper wire infrastructure. The advantage of SHDSL is in spectral compatibility with Asymmetrical Digital Subscriber Loop - ADSL that results in easy field installation without degradation of current DSL services within copper pair bundle. Some of standard interfaces on digital telephone exchanges include E1 with V5.1 (no traffic concentration) or V5.2 (with traffic concentration) protocols. The same kinds of interfaces are also supported by Digital Subscriber Loop Accesss Multiplexers - DSLAM, that are used for transmission of telephone conversations between DSLAM and telephone exchange. Interconnections between base stations within GSM and future 2.5G (GPRS, EDGE) and 3G (UMTS) wireless networks are build upon E1/E3 or ATM interfaces. The goal of the project is the design and implementation of multichannel transmission system interconnecting SHDSL with E1 on loops up to 4 km long. This increases the classical E1 reach by a factor of 4-5, without the need for intermediate repeaters and by using only one copper pair. The whole system is based on modular architecture, where it is possible to independently choose the number of SHDSL and E1 interfaces. It is build as a module, connected to an already designed platform, that integrates communications processor with V5.1/V5.2 protocols and a real-time operating system. Typical applications include data and/or voice transfer on longer distances, modem with direct interconnection to telephone exchange, interconnection interface between wireless network base stations or interface between remote internet service provider and telephnoe exchange. It can save a number of copper pairs (up to 1:30) when used with systems of telephone multiplexers, which is of great importance for access to wired telephony in remote areas. All differnet applications mentioned can significantly improve the development of telecommunications infrastructure both in Slovenia and worldwide.
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