Showing papers on "Fast packet switching published in 1973"
04 Jun 1973
TL;DR: The first computer-communication networks put into operation were designed around the communications provided by the existing worldwide telephone network, and Lucky has given a convincing rationale for that decision.
Abstract: The first computer-communication networks put into operation were designed around the communications provided by the existing worldwide telephone network. Lucky has given a convincing rationale for that decision.
222 citations
01 Jan 1973
TL;DR: In this paper a model for a packet switching node is investigated and buffer requirements and overflow probabilities are derived as a function of local loop and trunk speeds and for various packet sizes.
Abstract: Packet multiplexing or switching systems split incoming customer messages into fixed length packets. Within a packet switching system information is transferred packet by packet. In this paper a model for a packet switching node is investigated. Terminals are connected to the node by local loops. In the model incoming messages are quantized into packets and completed packets are transferred to the desired outgoing trunk. Buffering techniques are applied to obtain high trunk utilization. In the model each trunk has a dedicated buffer which stores packets queueing up for transmission. First the statistics of packet arrival at a trunk buffer is analyzed by investigating the process of quantizing messages which arrive dispersed and overlapping in time. Then buffer requirements and overflow probabilities are derived as a function of local loop and trunk speeds and for various packet sizes.
8 citations
TL;DR: A development of packet switching is discussed in this article, which lets the customer lease only the transmission channel and provide his own switching.
Abstract: Data communication is a vital part of any industrialised society, and much effort goes into optimising the use of the available resources. One way is to let the customer lease only the transmission channel and provide his own switching. A development of packet switching is discussed in this article.
4 citations
01 Jan 1973
TL;DR: A transmission control method and call control signalling method between computer and packet switched network are proposed for the packet interleaved communication on the basis of the HDLC procedure.
Abstract: This paper describes a study of transmission control procedure for computer to computer and computer to terminal communication through a public packet switched network.Four types of basic data link are defined over a packet travel path in the network, and the functions required for the data link are discussed.By applying the result of the discussion and introducing the concept of a process number, a transmission control method and call control signalling method between computer and packet switched network are proposed for the packet interleaved communication on the basis of the HDLC procedure.
2 citations
TL;DR: This paper discusses a local PCM switching network, demonstrated with a model of three local exchanges, where all subscribers are connected with the exchange via concentrators and control functions that are not executed by programs of the central processor are realized by microprograms in a wired read-only storage in these peripheral control circuits.
Abstract: This paper discusses a local PCM switching network. The characteristics of this network are demonstrated with a model of three local exchanges. All subscribers are connected with the exchange via concentrators. An exchange is controlled by a central processor with a stored program. This processor interacts with the peripheral switching units, represented by the central switching network and two types of control circuits, located within the exchange. These control circuits control either the concentrators or they communicate with counterparts, situated in other local exchanges. All control functions that are not executed by programs of the central processor are realized by microprograms in a wired read-only storage (ROS) in these peripheral control circuits.