This cutting-edge volume is a print version of leading expert Gunnar Heine's presentation on the optimization and trouble-shooting of GPRS networks. Starting with a comprehensive and detailed examination of the capabilities of GPRS technology, this practical resource outlines the different means and options for determining the performance and quality of a GPRS network and explains how to reproduce these results in your network to improve efficiency and solve network problems. You find an in-depth explanation of how to fine-tune the different components of a GPRS network to achieve the maximum performance for a wide range of applications. You learn how to nail down performance bottlenecks in the different parts of your network. Moreover, the presentation includes a detailed analysis of the typical errors and failures of GPRS networks, discriminating mobile station issues from network problems.
Quality of Service in GPRS-Networks; What is Quality of Service in GPRS Networks ‑ The QoS-Scope of the GPRS Network Operator. The QoS-Perception of the End-User. The Relationship between QoS-Profile. QoS-Perception and Perceived Performance.; Definition of the Perceived Performance ‑ Throughput Rate. Maximum and Mean Round Trip Time. Reasons for the Huge Difference between RTTmean and RTTmax.; Perceived Performance ‑ Perceived Performance vs. Traffic Classes (Rel. 99).; Measuring the Perceived Performance ‑ Measurements on the R-Interface. Measurements on the Gb-Interface. Measurements on the Gn- and Gi-Interface.; Criticality of Performance-Parameters on the GPRS Interfaces ‑ R-Interface. Air-Interface. Abis-Interface. Gb-Interface. Gn-Interface.; Performance Leakage within the GPRS Protocol Stack - RLCMAC. LLC. SNDCP. IP. TCP. Relative Performance Leakage.; The Definition of Key Performance Indicators - Measurement. Applications. Environmental Constraints. Timing KPI's. Throughput KPI's.; The TCP/IP World in the Mobile Environment; Introducing the IP-Protocol Stack.; IP-Addresses ‑ IP-Address Classes. Special IP-Address Notations. Determination of the Owner of an IP-Address.; The Process of IP-Address Allocation ‑ The Dynamic Host Configuration Protocol (DHCP). Private IP-Addresses. Using Network Address Translation (NAT) for Interconnection. Liabilities of NAT. Optimized Use of NAT in GPRS.; The IP-Header - Overview. Example of an IP-Header. The IP-Header. The TOS- Field (Type of Service).; Details of the Internet Control Message Protocol (ICMP) ‑ ICMP-Message Format, ICMP-Messages. ; Using ICMP for Roundtrip Time (RTT) Measurements in GPRS ‑ Use Trace Route to Determine the IP-Address of the 1st Router.; Details of the Transmission Control Protocol (TCP) ‑ Services of TCP, TCP Connection Establishment. TCP Connection Release. The TCP-Header. Sliding Windows in TCP. The Roundtrip Time (RTT) in TCP-Connections. Advanced TCP-Features. The Nagle Algorithm and Delayed Acknowledgements. The Slow Start and Congestion Avoidance Algorithms. The Fast Retransmit Algorithm. The Fast Recovery Algorithm.; And what about TCP/IP in GPRS? ‑ Some Basic Questions, The Bandwidth Delay Product. Consequences of the RTT-Variance for the GPRS Performance.;
-
Gunnar Heine
Gunnar Heine is President and CEO of INACON GmbH, and has conducted extensive research in 3GPP standardization. He holds an M.S. in communication technology from the University of Wilhelmshaven. He is the author of, GSM Networks: Protocols, Terminology and Implementation, GPRS A-Z, and GPRS Signaling and Protocol Analysis Vloumes 1 and 2, and GPRS: Gateway to Third Generation Mobile Networks (Artech House, 1999, 2000, 2002, 2003). He is also the coauthor of EDGE from A-Z (Artech House, 2001).