GSM Switching, Services and Protocols ppt

... can calculate a set of (RAND, SRES) 2- tuples in advance, store them in the HLR, and send them on demand to the requesting VLR. The VLR stores this set (RAND[n], SRES[n]) and uses a new 2-tuple ... security and data protection, are gaining enormous importance in modern digital systems [17]. GSM therefore introduced powerful algorithms and encryp- tion techniques. The various servic...

Ngày tải lên: 17/10/2013, 21:15

... the air interface in the ISDN reference model GSM Switching, Services and Protocols: Second Edition. Jo È rg Eberspa È cher, Hans-Jo È rg Vo È gel and Christian Bettstetter Copyright q 2001 John ... encryption, and handover Protocol Architecture 7.1 Protocol Architecture Planes The various physical aspects of radio transmission across the GSM air interface and the realization...

Ngày tải lên: 20/10/2013, 15:15

... of the handover and through transferring the handover decision to the BSS. The GSM handover is thus a network-originated handover as opposed to a mobile-originated handover, where the handover ... supplementary services is requested or changed, e.g. the currently valid target number for unconditional call forwarding in the HLR or VLR registers. 8 GSM Switching, Services and Prot...

Ngày tải lên: 20/10/2013, 15:15

... in a networktransition switching unit and carried as a voiceband signal in the PSTN to the analog terminal. After these introductory remarks, the GSM data and teleservices and their realization ... transcoding in the TRAU. From the MSC on, the speech 9 GSM Switching, Services and Protocols: Second Edition. Jo È rg Eberspa È cher, Hans-Jo È rg Vo È gel and Christian Bettste...

Ngày tải lên: 24/10/2013, 13:15

... International operation of network management 10 GSM Switching, Services and Protocols: Second Edition. Jo È rg Eberspa È cher, Hans-Jo È rg Vo È gel and Christian Bettstetter Copyright q 2001 John ... response times, etc.), and utilization of network components (hardware and software).The objective is on one hand to ensure a good utilization of resources and on the other hand...

Ngày tải lên: 24/10/2013, 13:15

... Switched and Circuit Switched Services In a GSM/ GPRS network, conventional circuit switched services (GSM speech, data, and SMS) and GPRS services can be used in parallel. The GPRS standard de®nes ... simultaneous operation of GPRS and conventional GSM services. Class B mobile stations are able to register with the network for both GPRS and conventional GSM services...

Ngày tải lên: 28/10/2013, 20:15

... writing. 12.3 Bearer and Teleservices of GSM Phase 21 Whereas GSM Phase 2 de®ned essentially a set of new supplementary services, Phase 21 is also addressing new bearer and teleservices. In this ... selection in multiband networks with different frequencies becomes possible. 12 GSM Switching, Services and Protocols: Second Edition. Jo È rg Eberspa È cher, Hans-Jo È rg Vo È ge...

Ngày tải lên: 28/10/2013, 20:15

... currently staying and has access to the network. There, the same communication services can be used as at home, limited only by the properties of the 1 GSM Switching, Services and Protocols: Second ... characteristics and the cellular principle. The understanding of duplex and multi- ple access schemes serves as the basis for understanding GSM technology. Chapter 3 introduc...

Ngày tải lên: 23/12/2013, 17:15

... Simpli®ed two-path model of radio propagation GSM Switching, Services and Protocols: Second Edition. Jo È rg Eberspa È cher, Hans-Jo È rg Vo È gel and Christian Bettstetter Copyright q 2001 John ... communication between mobile and base station, the available frequency band is split into two partial bands, to enable simultaneous sending and receiving. One partial band is assign...

Ngày tải lên: 23/12/2013, 17:15

... Supplementary services are complementing the control and modi®cation of extended services and are only usable in connection with a telecommuni- cation service. 4 Figure 4.1: Bearer and teleservices GSM Switching, ... non- speech services (e.g. BS26) and an extended range of supplementary services E3 1996 Enhanced service range with even more telecommunication and supplem...

Ngày tải lên: 23/12/2013, 17:15

... BSIC and BCCH frequency), the procedure variant to establish a physical channel (asynchronous or synchronous handover, Figure 7.24), and a handover reference number. Having received a handover ... station and SMS Service Center (SMS-SC). 7.4 Signaling at the Air Interface (Um) 171 Figure 7.37: Protocols at the A interface between MSC and BSS 7.2 Protocol Architecture of the User Pla...

Ngày tải lên: 20/01/2014, 23:20

... network transition switching unit and carried as a voiceband signal in the PSTN to the analog terminal. After these introductory remarks, the GSM data and teleservices and their realization are discussed ... transcoding in the TRAU. From the MSC on, the speech 9 GSM Switching, Services and Protocols: Second Edition. Jo È rg Eberspa È cher, Hans-Jo È rg Vo È gel and Christia...

Ngày tải lên: 20/01/2014, 23:20

... introduced in GSM on both the network and the terminal side. These platforms offer mechanisms, functions, and protocols for de®nition and control of services and applications. Those services/ applications ... writing. 12.3 Bearer and Teleservices of GSM Phase 21 Whereas GSM Phase 2 de®ned essentially a set of new supplementary services, Phase 21 is also addressing new be...

Ngày tải lên: 20/01/2014, 23:20

... Supplementary services are complementing the control and modi®cation of extended services and are only usable in connection with a telecommuni- cation service. 4 Figure 4.1: Bearer and teleservices GSM Switching, ... to transport user payloads. The basic services are called transport services [7] or bearer services in ISDN ± and therefore in GSM, too. The GSM bearer s...

Ngày tải lên: 26/01/2014, 12:20

Ngày tải lên: 29/06/2014, 07:20