By Basavaraj Patil, Yousuf Saifullah, Stefano Faccin, Srinivas Sreemanthula, Lachu Aravamudhan, Sarvesh Sharma, Risto Mononen
IP in instant Networks is the 1st complete advisor that exhibits how IP is enabled in 2G, 2.5G and 3G instant networks. A world-class crew of instant engineers provides a scientific, specialist suggestions for each top instant expertise, together with 802.11, Bluetooth(tm), GSM/GPRS, CDMA and i-mode. This book's in-depth assurance encompasses structure, deployment thoughts, operation, mobility versions, functions, and masses extra. The evolution of instant networks from circuit-switched to packet-switched Key technical demanding situations to instant IP-and confirmed options present and rising instant IP functions, together with Multimedia messaging, VoIP-over-wireless, and site providers the criteria our bodies suitable to the instant architectures which are defining the necessities for the rising instant net past 3G: a 3GPP/3GPP2 perspectiveIf you are answerable for making plans, constructing, deploying, or coping with instant IP networks, you can find IP in instant Networks an essential source.
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A channel can be defined as an individually assigned, dedicated pathway through a transmission medium for a single user's information. The physical medium of transmission, which in our case is the wireless spectrum, can be divided into individual channels based on a set of criteria. These criteria depend on the technology that is utilized to make the distinction between channels. The three primary technologies used in wireless cellular communication in order to separate the user channels are • Frequency division multiple access (FDMA) • Time division multiple access (TDMA) • Code division multiple access (CDMA) Figure 3-4 uses the analogy of a room as a transmission resource to illustrate these technologies.
SPREAD SPECTRUM The wireless spectrum is a scarce resource, with tight regulations in terms of usage and power radiated along with licenses required to operate. This is true for most of the wireless systems in place. Interference is an issue that wireless networks must contend with. Spread spectrum is one of the techniques employed that inherently is less sensitive to interference. Spread spectrum techniques typically use more bandwidth than necessary to transmit and receive bits. Spread spectrum techniques inherently offer more privacy than narrowband techniques, as they are more difficult to intercept or spy on.
Figure 2-12. Name resolution operation. edu. The application program contacts the local name server that it is configured with. If the name server does not have this in its cache, it will query other name servers, and in the preceding example the querying is initiated from the root server. The local name server may be configured with the address of the root server, or it may contact another name server in its domain. One final aspect of name server resolution is the inverse mapping of addresses to names.
IP in Wireless Networks by Basavaraj Patil, Yousuf Saifullah, Stefano Faccin, Srinivas Sreemanthula, Lachu Aravamudhan, Sarvesh Sharma, Risto Mononen