Preventing overload and verifying link stability in an implementation of the DPNSS layer 2 protocol

Author

Berger, Arthur W. ; Kent, James S. ; Stein, Michael V.

Author_Institution

AT&T Bell Lab., Holmdel, NJ, USA

fYear

1989

fDate

27-30 Nov 1989

Firstpage

175

Abstract

The digital private network switching system (DPNSS) layer 2 protocol specification does not explicitly indicate methods of layer 2 overload control or link stability verification. An efficient strategy for dealing with DPNSS-compatible exchanges that rapidly retransmit frames has been designed and implemented in the 5ESS-PRX switch to provide high performance and reliability in the DDSN network for the United Kingdom. The strategy is to optimize processor efficiency by ignoring as many frames as possible while keeping the reset probability below 10^-8 and to verify link stability periodically. Periodic transmission of specialized layer 2 test frames over the DPNSS link assures link stability

Keywords

electronic switching systems; private telephone exchanges; probability; protocols; telecommunication traffic; 5ESS-PRX switch; AT&T; PBX; United Kingdom; digital private network switching system; idle link assurance test frame; layer 2 overload control; layer 2 protocol specification; link stability verification; processor efficiency optimization; reset probability; Access protocols; Control systems; Delay; Intelligent networks; Stability; Switches; Switching systems; Telecommunication switching; Telephony; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE

Conference_Location

Dallas, TX

Type

conf

DOI

10.1109/GLOCOM.1989.63962

Filename

63962