Download Emerging Wireless Technologies and the Future Mobile by Dipankar Raychaudhuri, Mario Gerla PDF

By Dipankar Raychaudhuri, Mario Gerla

ISBN-10: 0521116465

ISBN-13: 9780521116466

This publication offers a preview of rising instant applied sciences and their architectural influence at the destiny cellular net. The reader will locate an outline of architectural concerns for the cellular net, besides extra specified technical dialogue of latest protocol thoughts at the moment being thought of on the examine degree. the 1st bankruptcy begins with a dialogue of expected mobile/wireless utilization situations, resulting in an identity of latest protocol good points for the long run web. this can be via a number of chapters that offer in-depth insurance of next-generation instant criteria, advert hoc and mesh community protocols, opportunistic supply and hold up tolerant networks, sensor community architectures and protocols, cognitive radio networks, vehicular networks, safeguard and privateness, and experimental platforms for destiny net study. every one of those contributed chapters contains a dialogue of recent networking standards for the instant situation into account, architectural ideas, and particular protocol designs, many nonetheless at examine degree.

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Furthermore, spectrum utilization depends strongly on time and place. Fixed spectrum allocation prevents the frequency spectrum unused by primary users from being used by unlicensed secondary users. Spectrum utilization can be improved significantly by allowing secondary users to access spectrum holes in the licensed band whenever it would not cause any interference to primary users. Cognitive radio has been proposed as the means for secondary users to utilize the spectrum holes, share the spectrum among them, and avoid the spectrum whenever primary users present.

Other filters can also be set up. The terminal (for uplink traffic) and the P-GW (for downlink traffic) classify the packets and map them into the corresponding bearers based on the packet filters. All the packets mapped into the same bearer receive the same packet-forwarding treatment such as scheduling, queuing management, rate shaping, and the like, in the network. The GPRS tunneling protocol (GTP) or proxy mobile IP can be used to implement the bearers in the EPC. Each IP packet entering the network is provided with a tunnel or proxy mobile IP header to route the packet to the destination and provide proper QoS.

It was later enhanced to support other network accesses including Wireless LAN, CDMA 2000, and fixed networks. The IMS includes various control function components such as call session control functions (CSCF) and application servers, for example, the session initiation protocol (SIP) application server, service centralization and continuity (SCC) application server, with standard interfaces based on SIP and many related protocols. It controls the services with user registration, origination, termination, transfer, and release of multimedia sessions.

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