Introduction to Network Planning Methods: Understanding Traffic Load Usage
Explore the fundamentals of network planning methods with a focus on traffic load usage. Learn about different types of traffic load, including general, symmetrical, and centralized, along with examples and explanations of each. Dive into the concept of use demand and traffic volume, and how it impacts network access locations and performance demands. Gain insights into optimizing network efficiency and management strategies.
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Presentation Transcript
1 CT 1502 NETWORK PLANNING METHODS LECTURE 3 PART II (CH7: INTRODUCTION TO NETWORKS BY PROF.SAAD ELHAJ BAKRY) Nada Al Dosary Aldosary.na@gmail.com Edited By: Maysoon AlDuwais
Use Demand and Traffic Volume 3 What is Use Demand? It is the traffic load generated from users in different network locations, in any data format (text-photo- voice-video etc), to be transmitted to other network locations.
Use demand and Traffic Volume 4 There are three types of Traffic Load Usage: General Traffic Load 1. Symmetrical Traffic Load 2. Centralized Traffic Load 3.
Example: Locations for network access: Source of load 5 8 different Access Locations Source of Load (Traffic)
Types on Traffic Load Usage 6 General Traffic Load: form. Traffic load have no specific 1.
Types on Traffic Load Usage 7 Symmetrical Traffic Load: Traffic load from first 1. network location to second is equal to traffic load from the second network location to the first. Example: Traffic load exchanged between different countries in the global telephone network.
Types on Traffic Load Usage 9 Centralized Traffic Load: Centralized network 1. location controls communication to all other network locations, and these network location cannot contact each other directly. Example: Used in private network that requires special management or monitoring control.
Use Demands and Traffic Volume Central Traffic load: A5 is the center 10
Performance Demand 12 Measurements for performance demand: 1. Availability 2. Congestion 3. Delay
Availability Availability: The Readiness of network to be used. Or reduction in network failure T Duration for measuring availability S Availability duration (within T) Availability (T S) Unavailability duration V = S / T Availability measurement NV = (T - S) / T Unavailability measurement T: Period of time determined to measure network availability S: Period of time (within T) where the network is available. 13
Congestion Congestion is the increase in traffic load to a level that exceeds the available network capacity. Congestion reasons: No enough capacity No enough hardware 1. 2. Congestion measurement is defined as the percentage of rejected traffic load to the total traffic load in a specific period of time. Congestion= Rejected load/ total load 14
Congestion Congestion measurement is usually used in circuit switched networks for telephone networks (PSTN) L Total load S Carried load Congestion (L S) Rejected load B = (L - S) / L Congestion measurement NB = S / L Non-congestion measurement 15
Delay The latency in traffic exchanged in the network due to limited network capacity, . occurs in store-and-forward networks Delay increase if the traffic load increase. Processing duration in switches P Wait time (before send) W Sending time (In channels) S Delay Propagation time G Duration of transmitting information from one site to another D = P + W + S + G 16
