Showing papers on "Packet loss published in 1982"

Congestion Control using Pacing in a Packet Radio Network

Abstract: Protocol design is a critical factor in achieving throughput and reliability goals in a packet radio network Here we examine the details of a hop transport protocol algorithm, called "pacing", which operates in a CSMA packet radio network The pacing algorithm provides adaptive flow control in order to accommodate changing traffic flow patterns and rates In addition, pacing seeks to time packet transmissions to ameliorate the classical "hidden terminal" problem encountered in multi-hop CSMA networks We found that the pacing algorithm considerably improves throughput and packet delivery reliability, compared to an earlier algorithm using a fixed-parameter flow control mechanism

Method of administering local and end-to-end acknowledgments in a packet communication system

Abstract: A D-bit in an X.25 data packet access protocol flags whether an acknowledgment of packet communication can be local or must be end-to-end. The disclosed method with programmed processing handles the D-bit option by a two-sided memory table that couples the X.25 access protocol and the internal protocol of a packet switching network. The table, called rack-- perm (for Receive ACKnowledgment PERMission) is set with one entry per data packet sequence number. The rack-- perm entries are modified by the internal protocol in response to an acknowledgment packet received from the switching network. Checks are made of rack-- perm by the internal protocol using indices of the access protocol to determine the number of acknowledgment packets permitted to be sent to an originating data terminal equipment.

Connecting system between networks

Abstract: PURPOSE:To attain inter-network connection of a packet terminal subscribed with a fixed connection service contract and terminal of other communication network, by converting protocol of call control information used in the other communication networks to that of information in a specified packet. CONSTITUTION:A signal used at a communication network N2 is converted into a character code at a signal converter I1 of an inter-network connecting device I in the transmission/receiving at a terminal T2 of the communication network N2 and a terminal T1 subscribed to a packet exchange network N1 in the fixed connection service (PVC) contract, and the I1 is controlled with a signal converter I2. A protocol conversion processing section I3 converts a program in a memory I5 and a call control signal code from the T2 with the call control information into a packet and the data from the T2 into a packet. Further, the packet from the T1 is decomposed inversely. A line control section I4 performs the transmission and receiving of the packet with the packet exchange network N1.