000			03594nam a22004695i 4500
001			978-1-4020-6631-3
003			DE-He213
005			20251006084536.0
007			cr nn 008mamaa
008			100301s2009 ne | s |||| 0|eng d
020			_a9781402066313
020			_a99781402066313
024	7		_a10.1007/978-1-4020-6631-3 _2doi
082	0	4	_a621.382 _223
100	1		_aFathi, Hanane. _eauthor.
245	1	0	_aVoice over IP in Wireless Heterogeneous Networks _h[electronic resource] : _bSignalling, Mobility, and Security / _cby Hanane Fathi, Shyam S. Chakraborty, Ramjee Prasad.
264		1	_aDordrecht : _bSpringer Netherlands, _c2009.
300			_bonline resource.
336			_atext _btxt _2rdacontent
337			_acomputer _bc _2rdamedia
338			_aonline resource _bcr _2rdacarrier
347			_atext file _bPDF _2rda
490	1		_aSignals and Communication Technology, _x1860-4862
505	0		_aIP-Based Wireless Heterogeneous Networks -- Voice over Internet Protocol -- Models for Performance Analysis in Wireless Networks -- Impact of Security on Real-Time Services: Link Layer Authentication Delay in WLAN 802.11b -- Impact of Signalling on Real-Time Services: SIP Session Setup Delay -- Impact of Mobility on Real-Time Services: Handover Delay -- Coupling Mobility and Security -- Towards Quality of Experience and Future Perspectives.
520			_aThe convergence of different types of traffic has preceded the convergence of systems and services in a wireless heterogeneous network. Voice and data traffic are usually treated separately in both 2G and 2.5G wireless networks. With advances in packet switching technology and especially with the deployment of wireless heterogeneous systems, both speech and data traffic are carried over wireless links by the same IP-based packet-switched infrastructure. However, this combination faces some challenges due to the inherent properties of the wireless network. The requirements for good quality VoIP communications are difficult to achieve in a time-varying environment due to channel errors and traffic congestion and across different systems. The provision of VoIP in wireless heterogeneous networks requires a set of time-efficient control mechanisms to support a VoIP session with acceptable quality. The focus of Voice over IP in Wireless Heterogeneous Networks is on mechanisms that affect the VoIP user satisfaction while not explicitly involved in the media session. This relates to the extra delays introduced by the security and the signaling protocols used to set up an authorized VoIP session and to the disruption caused by the user mobility during the session. Voice over IP in Wireless Heterogeneous Networks thus investigates and proposes cross-layer techniques for realizing time-efficient control mechanisms for VoIP: signaling, mobility and security.
650		0	_aENGINEERING.
650		0	_aCOMPUTER NETWORK ARCHITECTURES.
650		0	_aTELECOMMUNICATION.
650	1	4	_aENGINEERING.
650	2	4	_aCOMMUNICATIONS ENGINEERING, NETWORKS.
650	2	4	_aCOMPUTER SYSTEMS ORGANIZATION AND COMMUNICATION NETWORKS.
700	1		_aChakraborty, Shyam S. _eauthor.
700	1		_aPrasad, Ramjee. _eauthor.
710	2		_aSpringerLink (Online service)
773	0		_tSpringer eBooks
776	0	8	_iPrinted edition: _z9781402066306
830		0	_aSignals and Communication Technology, _x1860-4862
856	4	0	_uhttp://dx.doi.org/10.1007/978-1-4020-6631-3 _zVer el texto completo en las instalaciones del CICY
912			_aZDB-2-ENG
942			_2ddc _cER
999			_c61793 _d61793