clients services and protocols

... can calculate a set of (RAND, SRES) 2tuples 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 from ... blocks of the TCH/F9.6 and TCH/H4.8 channels to the standard format of 456 bits Thus, blocks of these channels can also be processed in a standardized way (interleaving, etc.), and the amount of redundancy ... transmitted (e.g a handover command), the current data block n is replaced by the convolutional coded FACCH message, and it is interleaved in a block-diagonal way with the data blocks (n 1) and (n 1) of...

Ngày tải lên: 17/10/2013, 21:15

... failure DCCH MS ! N 00101111 Handover access DCCH MS ! N ± Handover command DCCH N ! MS 00101011 Handover complete DCCH MS ! N 00101100 Ciphering Handover Message Handover failure Channel release ... Control (CC), Supplementary Services (SS), and Short Message Service (SMS) Call control handles all tasks related to setting up, maintaining and taking down calls The services of call control are ... encryption and decryption on the data channel The RR sublayer provides several services at the RR-SAP to the MM sublayer These services are needed to set up and take down signaling connections and to...

Ngày tải lên: 20/10/2013, 15:15

... categories: ² Handover because of more favorable path loss conditions ² Mandatory intercell handover ² Mandatory intracell handover 200 Roaming and Switching Table 8.1 Threshold values for the GSM handover ... standardizing only the signaling interface that de®nes the processing of the handover and through transferring the handover decision to the BSS The GSM handover is thus a network-originated handover ... its participation in the handover decision The MSC causes the new BSS to prepare a channel for the handover, and frees the handover to the mobile station (handover command), as soon as the reservation...

Ngày tải lên: 20/10/2013, 15:15

... transparent and nontransparent services These bearer services carry data between the MT of the mobile station and the Interworking Function (IWF) of the MSC For the realization of bearer services, ... voiceband signal, which can then be transmitted on an analog voiceband of 3.1 kHz The bearer services realized in this way can offer the protocols that may be required for the support of teleservices ... 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...

Ngày tải lên: 24/10/2013, 13:15

... supply probability, and availability, and it can also be characterized with nontechnical criteria like ease of operation and comfort of subscriber access or even hot-line and support services Considering ... 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 to recognize trends ... Failure and con®guration management are speci®ed only for the BSS; the reasons are that on one hand the databases (HLR, VLR) were assigned to accounting management, and on the other hand standardization...

Ngày tải lên: 24/10/2013, 13:15

... additional non-standardized services Examples are access to information databases, messaging services (via store -and- forward mailboxes), and transaction services (e.g credit card validations and electronic ... 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 ... with the SGSN 11.2 Services 11.2.1 Bearer Services and Supplementary Services The bearer services of GPRS offer end-to-end packet switched data transfer to mobile 11.2 245 Services subscribers...

Ngày tải lên: 28/10/2013, 20:15

... supplementary services, Phase 21 is also addressing new bearer and teleservices In this section we give an overview of these new speech and data services They signi®cantly improve the GSM speech quality and ... server and an SMS service center However, both concepts have signi®cant disadvantages: supplementary services are subject to international standardization, and on the other hand these services ... assign and control priorities to users and their calls (e.g for emergency calls) All those services together are referred to as Advanced Speech Call Items (ASCI) 12.3 Bearer and Teleservices...

Ngày tải lên: 28/10/2013, 20:15

... more services recently introduced in GSM Phase 21 It covers new speech services, high-rate data services, supplementary services for speech and location services, service platforms, WAP, and Advanced ... Broadcast (DAB) and Digital Video Broadcast (DVB), are very interesting for wireless transmission of radio and television stations as well as for audio- and video-on-demand and broadband transmission ... processing, and channel coding) and mechanisms for authentication and encryption Chapter covers the entire protocol architecture of GSM (payload transport and signaling) For example, communication protocols...

Ngày tải lên: 23/12/2013, 17:15

... systems and is also used in digital systems For the communication between mobile and base station, the available frequency band is split into two partial bands, to enable simultaneous sending and ... system bandwidth for a time slot is not assigned to one station, but the system frequency range is subdivided into subbands, and TDMA is used for multiple access to each subband The subbands are ... multiple of its original bandwidth Typically, spreading factors are between 10 and 1000; they generate a broadband signal for transmission from the narrowband signal, and this is less sensitive...

Ngày tải lên: 23/12/2013, 17:15

... authentication and user data encryption based on the subscriber identity IMSI and secret keys Beyond that, the SIM can store short messages and charging information, and it has a telephone book function and ... Switching and Management Subsystem (SMSS) consists of the mobile switching centers and the databases which store the data required for routing and service provision (Figure 3.5) These components and ... routing, and service feature processing The main difference between an ISDN switch and an MSC is that the MSC also has to consider the allocation and administration of radio resources and the...

Ngày tải lên: 23/12/2013, 17:15

... nonspeech services (e.g BS26) and an extended range of supplementary services E3 1996 Enhanced service range with even more telecommunication and supplementary services 4.1 Bearer Services The basic services ... implementation and introduction Class Introduction Services E1 1991 Basic operation consisting of telephone services and some appropriate supplementary services E2 1994 Extended operation with telephone services, ... R) 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 services offer asynchronous or synchronous...

Ngày tải lên: 23/12/2013, 17:15

... inputs for the handover and power control algorithms The measurement objects are on the one hand the uplink and downlink of the current channel (TCH or SDCCH), and on the other hand the BCCH carriers ... Synchronization means on the one hand the time-wise synchronization of mobile station and base with regard to bits and 5.3 71 Synchronization frames, and on the other hand tuning the mobile station ... the dB bandwidth of the ®lter h(t) and T the bit duration of the incoming bit stream The rectangular step function and the impulse response of the Gaussian lowpass are shown in Figure 5.3, and the...

Ngày tải lên: 20/01/2014, 23:20

... can calculate a set of (RAND, SRES) 2tuples 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 from ... blocks of the TCH/F9.6 and TCH/H4.8 channels to the standard format of 456 bits Thus, blocks of these channels can also be processed in a standardized way (interleaving, etc.), and the amount of redundancy ... transmitted (e.g a handover command), the current data block n is replaced by the convolutional coded FACCH message, and it is interleaved in a block-diagonal way with the data blocks (n 1) and (n 1) of...

Ngày tải lên: 20/01/2014, 23:20

... failure DCCH MS ! N 00101111 Handover access DCCH MS ! N ± Handover command DCCH N ! MS 00101011 Handover complete DCCH MS ! N 00101100 Ciphering Handover Message Handover failure Channel release ... Control (CC), Supplementary Services (SS), and Short Message Service (SMS) Call control handles all tasks related to setting up, maintaining and taking down calls The services of call control are ... encryption and decryption on the data channel The RR sublayer provides several services at the RR-SAP to the MM sublayer These services are needed to set up and take down signaling connections and to...

Ngày tải lên: 20/01/2014, 23:20

... categories: ² Handover because of more favorable path loss conditions ² Mandatory intercell handover ² Mandatory intracell handover 200 Roaming and Switching Table 8.1 Threshold values for the GSM handover ... standardizing only the signaling interface that de®nes the processing of the handover and through transferring the handover decision to the BSS The GSM handover is thus a network-originated handover ... its participation in the handover decision The MSC causes the new BSS to prepare a channel for the handover, and frees the handover to the mobile station (handover command), as soon as the reservation...

Ngày tải lên: 20/01/2014, 23:20

... transparent and nontransparent services These bearer services carry data between the MT of the mobile station and the Interworking Function (IWF) of the MSC For the realization of bearer services, ... voiceband signal, which can then be transmitted on an analog voiceband of 3.1 kHz The bearer services realized in this way can offer the protocols that may be required for the support of teleservices ... 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...

Ngày tải lên: 20/01/2014, 23:20

... supply probability, and availability, and it can also be characterized with nontechnical criteria like ease of operation and comfort of subscriber access or even hot-line and support services Considering ... 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 to recognize trends ... Failure and con®guration management are speci®ed only for the BSS; the reasons are that on one hand the databases (HLR, VLR) were assigned to accounting management, and on the other hand standardization...

Ngày tải lên: 20/01/2014, 23:20

... supplementary services, Phase 21 is also addressing new bearer and teleservices In this section we give an overview of these new speech and data services They signi®cantly improve the GSM speech quality and ... server and an SMS service center However, both concepts have signi®cant disadvantages: supplementary services are subject to international standardization, and on the other hand these services ... assign and control priorities to users and their calls (e.g for emergency calls) All those services together are referred to as Advanced Speech Call Items (ASCI) 12.3 Bearer and Teleservices...

Ngày tải lên: 20/01/2014, 23:20

... additional non-standardized services Examples are access to information databases, messaging services (via store -and- forward mailboxes), and transaction services (e.g credit card validations and electronic ... 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 ... with the SGSN 11.2 Services 11.2.1 Bearer Services and Supplementary Services The bearer services of GPRS offer end-to-end packet switched data transfer to mobile 11.2 245 Services subscribers...

Ngày tải lên: 20/01/2014, 23:20

... switching, services, and protocols / Jorg Eberspacher, Hans-Jorg Vogel, È È È È Christian Bettstetter.± 2nd ed p cm Includes bibliographical references and index Prey ed.: GSM switching, services, and ... Intra-MSC Handover 8.4.3 Decision Algorithm for Handover Timing 8.4.4 MAP and Inter-MSC Handover 8.4.4.1 Basic Handover between two MSCs 8.4.4.2 Subsequent Handover ... Precedence and Pre-emption (eMLPP) 12.3.3 New Data Services and Higher Data Rates: HSCSD, GPRS, and EDGE 12.4 Supplementary Services in GSM Phase 2+ 12.4.1 Supplementary Services...

Ngày tải lên: 20/01/2014, 23:20