Showing papers on "Broadband networks published in 1983"

Interconnection of broadband local area networks

Abstract: Interconnection of multiple broadband local area networks to form an integrated packet transport system presents several challenges. To take full advantage of broadband systems, assignment of nodes to channels must be dynamic, leading to the use of a flat address space. Combined with the desire to avoid reliance on a central server or complex routing in packet forwarders, this addressing scheme leads to adoption of a controlled flooding technique to “discover” the best path to a destination node. This discovery procedure sets up a path through internetwork forwarders for use by subsequent packets to the same destination. This paper describes the design and implementation of such a technique in Sytek's LocalNet(TM) systems along with several refinements which increase performance and keep the worst case load for route discovery below a few percent of network capacity.

Broadband communications system

Abstract: In an optical broadband network with subscriber connection lines (Al) in each case running between an exchange (VSt) and a subscriber station (TlnSt) and in each case having two optical waveguides (Lb, Ls), only TV and/or stereo sound broadband signals are transmitted via one optical waveguide (Lb) from the exchange (VSt) to the subscriber station (TlnSt) All digital communication narrowband signals - for 64 kbit/s digital telephony, facsimile, 8 kbit/s signalling, synchronisation, data transmission - are transmitted via the other optical waveguide (Ls) in both transmission directions between the exchange (VSt) and the subscriber station (TlnSt) The narrowband digital signals of both transmission directions are in each case transmitted using the time division multiplex method; the broadband signals are transmitted on analog-modulated carriers

Broadband communication system

Abstract: In an optical broadband network with subscriber connection lines (AI) in each case running between an exchange (VSt) and a subscriber station (TlnSt) and in each case having two optical waveguides (Lb, Ls), only TV and/or stereo sound broadband signals are transmitted via one optical waveguide (Lb) from the exchange (VSt) to the subscriber station (TlnSt); all narrowband digital communication signals - for 64 kbit/s digital telephones, facsimiles, 8 kbit/s signalling, synchronisation, data transmission - and also two-way digital videotelephony signals where appropriate are transmitted in both transmission directions via the other optical waveguide (Ls) between the exchange (VSt) and the subscriber station (TlnSt). The digital communications signals of the two transmission directions are in each case transmitted in time division multiplex mode; the broadband signals are transmitted on analog-modulated carriers.

Integrated communication system

Abstract: of the Disclosure Integrated Communication System An integrated communication system (e.g. , BIGFON) in-cludes the narrow-band telephone network and a super-posed video-telephone network. The path search for setting up calls in the telephone network is carried out with the said of the telephone call numbers. To permit a video-tele-phone network structure independent of the structure of the telephone network, each subscriber of the video-tele-phone network must be assigned a separate video-telephone call number for the path search in the broadband network. In order that a subscriber does not have to dial two different numbers to set up a video-telephone call, each exchange (V1, V2) of the communication system includes a mapping circuit (ZS) which establishes for each video-telephone subscriber (TEA, TEB) a correspondence between his or her telephone call number and a video-telephone call number serving to set up calls in the video-telephone network. This video-telephone call number can be called up from the mapping circuit (ZS) via the telephone net-work (FN). (Fig.1)