By Gerardo Gomez, Rafael Sanchez
This complete source incorporates a designated technique for assessing, examining and optimizing End-to-End carrier functionality lower than various mobile applied sciences (GPRS, area, WCDMA and CDMA2000). It comprises instructions for interpreting a number of assorted providers, together with FTP, net streaming and POC, together with examples of study and troubleshooting from a consumer point-of-view.
- Focuses at the end-user viewpoint, with a close research of the most resources of carrier functionality degradation and a finished description of cellular facts prone
- Includes an in depth presentation of time-honored key functionality signs (KPIs) that are re-defined to conform with every one specific community
- Provides carrier functionality benchmarking for various applied sciences from actual networks
- Explores a brand new method of carrier administration often called consumer event administration, together with the explanations why it's overcoming conventional provider administration and its influence on sales and shopper delight
- Illustrates all issues all through utilizing actual global examples gleaned from state-of-the-art study
This booklet attracts jointly findings from authoritative assets that may entice mobile community operators and proprietors. The theory-based, useful procedure can be of curiosity to postgraduate scholars and telecommunication and consulting businesses operating within the box of mobile technologies.Content:
Chapter 1 advent (pages 1–12): John Cullen, Mattias Wahlqvist and Gerardo Gomez
Chapter 2 mobile instant applied sciences (pages 13–49): Petteri Hakalin, Pablo Tapia, Juan Ramiro?Moreno, Raquel Rodriguez, M. a. Carmen Aguayo?Torres and Rafael Sanchez
Chapter three facts companies structure and Standardization (pages 50–102): Salvador Hierrezuelo, Alejandro Gil, Juan Guerrero, Raquel Rodriguez, Juan Torreblanca, Mattias Wahlqvist and Gerardo Gomez
Chapter four caliber of provider Mechanisms (pages 103–138): Raquel Rodriguez, Daniel Fernandez, Hector Montes, Salvador Hierrezuelo and Gerardo Gomez
Chapter five End?to?End provider functionality research (pages 139–185): Rafael Sanchez, Gerardo Gomez, Pablo Ameigeiras, Jorge Navarro and Gabriel Ramos
Chapter 6 provider functionality Verification and Benchmarking (pages 186–242): Rafael Sanchez, Manuel Martinez, Salvador Hierrezuelo, Juan Guerrero and Juan Torreblanca
Chapter 7 client adventure administration (pages 243–263): Brian Carroll
Chapter eight provider functionality Optimization (pages 264–289): Gerardo Gomez, Juan Torreblanca and Mattias Wahlqvist
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Extra resources for End-to-End Quality of Service over Cellular Networks: Data Services Performance and Optimization in 2G/3G
Despite discussion on which solution may provide the best results, the objective of this section is to provide a general overview about the systems involved in these two evolution paths, including a brief description of the architecture and capabilities. In addition to 2G and 3G cellular systems, other possibilities currently deployed for wireless solutions, such as WLAN will also be analyzed, considering the main benefits and peculiarities that these technologies present. Finally, an introduction to the future Fourth Generation (4G) systems, seen as a full integration of all the coexisting systems that can be found nowadays will be presented.
6 Mobility The different handover types supported by CDMA2000-1x system are very similar to those of 3GPP WCDMA. The hard handover is performed between cells using different frequencies, while a SHO is made between cells that use the same frequency. In SHO, the FCH is maintained and the SCH may or may not be turned off depending on the BS implementation. In hard handover, the SCH is always turned off. Additionally, if the SO is changing in the hard handover (typical inter-generation handover) the packet data state has to be changed to dormant mode and the connection has to be re-established.
In case of moderate FER, RLP usually can recover the data and no TCP retransmission is needed. RLP retransmissions consume part of the bandwidth and thus reduce the total throughput. Under bad radio conditions the RLP will get exhausted due to excessive amount of NACKs which easily leads to TCP slow start and retransmissions. At very severe FER conditions, the TCP timeout can cause the whole transfer to be halted. e. streaming over UDP), this effect can cause great degradation of the user quality.