Journal ArticleDOI
Packet Broadcast Networks—A Performance Analysis of the R-ALOHA Protocol
TLDR
The performance of the R-ALOHA protocol for multiple access is studied and numerical results from both analysis and simulation are presented to illustrate the accuracy of the analytic models as well as performance characteristics of the rhoHA protocol.Abstract:
In packet broadcast networks, users are interconnected via a broadcast channel. The key problem is multiple access of the shared broadcast channel. The performance of the R-ALOHA protocol for multiple access is studied in this paper. Two user models with Poisson message arrivals are analyzed; each message consists of a group of packets with a general probability distribution for group size. In the first model, each user handles one message at a time. In the second model, each user has infinite buffering capacity for queueing. Analytic models are developed for characterizing message delay and channel utilization. Bounds on channel throughput are established for two slightly different protocols. Numerical results from both analysis and simulation are presented to illustrate the accuracy of the analytic models as well as performance characteristics of the R-ALOHA protocol.read more
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References
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Journal ArticleDOI
Packet Switching in Radio Channels: Part I--Carrier Sense Multiple-Access Modes and Their Throughput-Delay Characteristics
TL;DR: Two protocols are described for CSMA and their throughput-delay characteristics are given and results show the large advantage CSMA provides as compared to the random ALOHA access modes.
Journal ArticleDOI
Ethernet: distributed packet switching for local computer networks
TL;DR: The design principles and implementation are described, based on experience with an operating Ethernet of 100 nodes along a kilometer of coaxial cable, of a model for estimating performance under heavy loads and a packet protocol for error controlled communication.
Journal ArticleDOI
Packet Switching in a Multiaccess Broadcast Channel: Performance Evaluation
Leonard Kleinrock,Simon S. Lam +1 more
TL;DR: A mathematical model is formulated for a "slotted ALOHA" random access system and a theory is put forth which gives a coherent qualitative interpretation of the system stability behavior which leads to the definition of a stability measure.
Journal ArticleDOI
Packet Switching in a Multiaccess Broadcast Channel: Dynamic Control Procedures
Simon S. Lam,Leonard Kleinrock +1 more
TL;DR: A Markovian decision model is formulated for the dynamic control of unstable slotted ALOHA systems and optimum decision rules are found and numerical results on the performance of controlled channels are shown for three specific dynamic channel control procedures.
Journal ArticleDOI
A carrier sense multiple access protocol for local networks
TL;DR: An analytic model is developed and the main result is the moment generating function of the distributed queue size (number of ready users) and mean value formulas for message delay and channel assignment delay are derived.