Tài liệu Giới thiệu về IP và ATM - Thiết kế và hiệu suất P14 ppt

... IP and ATM Design Performance: With Applications Analysis Software, Second Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 ... IP and ATM Design Performance: With Applications Analysis Software, Second Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7...

Ngày tải lên: 24/12/2013, 13:17

... admissible load based on burst-scale loss analysis Use: admission control in ATM (burst-scale component in SBR) or IP (e.g. voice-over -IP with silence suppression) for delay-sensitive VBR traffic Formulas: ... N·D/D/1 analysis Use: admission control in ATM (for DBR, i.e. cell-scale component) or IP (e.g. voice-over -IP with fixed packet sizes) for constant-bit-rate traffic (continued...

Ngày tải lên: 24/12/2013, 13:17

... IP and ATM Design Performance: With Applications Analysis Software, Second Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 ... PERFORMANCE 49 One way of taking the service bandwidth into account is to use the MbitE/s (the ‘megabit-erlang-per-second’)asameasureoftraffic intensity. Thus 1 E of 64 kbi...

Ngày tải lên: 24/12/2013, 13:17

... Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 (Electronic) 66 PERFORMANCE EVALUATION important to real-time services, e.g. voice and video. Little’s result ... infinite and the queue discipline is first-come first-served. We will introduce abbreviations for other arrival and service processes as we need them. Elementary relat...

Ngày tải lên: 24/12/2013, 13:17

... IP and ATM Design Performance: With Applications Analysis Software, Second Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 ... utilization (80%) Figure 5.6. Speed Increase of Cell-Rate Simulation Relative to Cell-by-Cell Simula- tion proportion to the average number of cells in a fixed-rate burst,...

Ngày tải lên: 24/12/2013, 13:17

... 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 (Electronic) 90 TRAFFIC MODELS telephony, which has a cell rate of 167 cell/s in ATM. The next step is to consider an ... one used for ATM or IP. Source models may be classified in a variety of ways: continuous time or discrete time, inter-arrival time or counting process, state-based or distribu...

Ngày tải lên: 24/12/2013, 13:17

... Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 (Electronic) EXACT ANALYSIS FOR FINITE OUTPUT BUFFERS 105 where Ak D 1  ... can (correctly) anticipate being able to use these methods to investigate the connection-level behaviour of ATM traffic. However, the major difference between circuit-switche...

Ngày tải lên: 24/12/2013, 13:17

... Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 (Electronic) 122 CELL-SCALE QUEUEING Source 1 Source 2 Source N . . . Source 1 Source 2 Source N . . . 2 × 2 ATM switching element Source multiplexer Source multiplexer Figure ... from this is called ‘cell-scale queueing’. MULTIPLEXING CONSTANT-BIT-RATE TRAFFIC Let us now take a closer look at what happens when we have cons...

Ngày tải lên: 24/12/2013, 13:17

... IP and ATM Design Performance: With Applications Analysis Software, Second Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hardback); 0-4 7 0-8 416 6-4 ... 1 Multiply by s a . p(X−i+1) a . p(X−i) X − i + 2 X − i + 1 X − i (1−a) . p(X−i+1) + a . p(X-i+1) Figure 9.10. Equating Up- and Down-Crossing Probabilities in the Genera...

Ngày tải lên: 21/01/2014, 19:20

... distinguishes three different operating principles: 1. multiplexing of constant-bit-rate streams 2. rate-envelope multiplexing 3. rate-sharing statistical multiplexing The first corresponds to peak rate ... IP and ATM Design Performance: With Applications Analysis Software, Second Edition. J M Pitts, J A Schormans Copyright © 2000 John Wiley & Sons Ltd ISBNs: 0-4 7 1-4 9187-X (Hard...

Ngày tải lên: 21/01/2014, 19:20