telecom s solution for 3g access networks

McGraw-Hill-2002-WCDMA and cdma2000 for 3G Mobile Networks

... This system, which was subsequently standardized as TIA553, was based on essentially the same technical specifications and design principles as the development system of the trial phase and used ... United States SMS available in GSM 1995 CDMA cellular and PCS technology introduced in the United States 1997 ETSI publishes GPRS standard 1999 Standards for 3G wireless services published Introduction ... GPRS is also now available in GSM CDMA systems, which use direct sequence spread spectrum technology, have been deployed in this country since 1995 Standards for 3G wireless services were published...

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Module 10: RADIUS as a Solution for Remote Access

Danh mục: Hệ điều hành

... the students’ responses Module 10: RADIUS as a Solution for Remote Access v Securing a RADIUS Solution A secure RADIUS solution ensures that only authorized remote access clients and servers are ... and Remote Access because the RADIUS client is a remote access server If Remote Access Clients Must • Administer Windows 2000–based servers • Access Web-based applications and FTP servers • Run ... remote access server Include RADIUS in your remote access solution to centralize remote access policies Module 10: RADIUS as a Solution for Remote Access 21 Authenticating Remote Access Clients Slide...

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Tài liệu TestKing''''s Building Cisco® Remote Access Networks docx

Danh mục: Quản trị mạng

... request a session ID A DHCP request process to request and IP address and session ID A RARP request process to request a MAC address and session ID Answer: B Explanation: When a host wishes to initiate ... resources after login Disallow a user from access to all resources after login Record all access of resources and how long the user accessed each resources Not to record any access of resources after ... that uses a trusted Kerberos server to verify secure access to both services and users In Kerberos, this trusted server is called the key distribution center (KDC) The KDC issues tickets to validate...

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Tài liệu W-CDMA and cdma2000 for 3G Mobile Networks pdf

Danh mục: Quản trị mạng

... This system, which was subsequently standardized as TIA553, was based on essentially the same technical specifications and design principles as the development system of the trial phase and used ... United States SMS available in GSM 1995 CDMA cellular and PCS technology introduced in the United States 1997 ETSI publishes GPRS standard 1999 Standards for 3G wireless services published Introduction ... GPRS is also now available in GSM CDMA systems, which use direct sequence spread spectrum technology, have been deployed in this country since 1995 Standards for 3G wireless services were published...

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Integrating SDH and ATM in UMTS (3G) Access Networks

Danh mục: Kĩ thuật Viễn thông

... 3G ACCESS NETWORK The Cost of Using ATM Switches in the Access ATM access networks are necessary, but expensive, as ATM is an expensive technology Moreover, the installation of a simple ATM switch ... SOLUTION FOR 3G ACCESS NETWORKS ECI Telecom s Solution for 3G Access Networks The cellular communications industry is and has always been an important ECI Telecom target market With this in mind, ... unrivaled solution for deploying 3G access networks It is tailored specifically for the needs of the cellular industry and has a reasonable cost structure The solution is based on the integration of SDH...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_2 doc

Danh mục: Kỹ thuật lập trình

... United States SMS available in GSM 1995 CDMA cellular and PCS technology introduced in the United States 1997 ETSI publishes GPRS standard 1999 Standards for 3G wireless services published Introduction ... GPRS is also now available in GSM CDMA systems, which use direct sequence spread spectrum technology, have been deployed in this country since 1995 Standards for 3G wireless services were published ... In IS-54 and IS-136, each voice channel has a bandwidth of 30 kHz and consists of six time slots For full-rate speech, three users use these six slots in a certain way For example, user uses time...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_3 doc

Danh mục: Kỹ thuật lập trình

... decode each user sequence as unambiguously as possible in the presence of noise, it is necessary that for j Ͼ 0, the value of C(j) be as small as possible compared to N Similarly, the cross-correlation ... cdma2000, Walsh codes used on traffic channels may vary from to 128 chips IS-95 uses a set of 64 fixed-length Walsh codes to spread forward physical channels For example, Walsh code is assigned to ... across successive chip periods is very small, that is, R(nt) is very small for nϾ compared to its value for n ϭ 0, copies of the desired signal can be extracted if their associated delays are...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_4 ppt

Danh mục: Kỹ thuật lập trình

... system so as to serve areas of high traffic density by using smart antennas Possible benefits of using smart antennas in 3G systems have been studied under the auspices of the Technology in Smart ... mobile station First, consider a synchronous CDMA system Since it uses a system-wide timing reference based on the Global Positioning System (GPS), symbols transmitted by individual mobile stations ... Spread Spectrum CDMA Systems for Wireless Communications Boston: Artech House, 1997 [22] S Verdu, “Minimum Probability of Error for Asynchronous Gaussian Multiple -Access Channels,” IEEE Trans...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_5 potx

Danh mục: Kỹ thuật lập trình

... channel, like the reverse access channel just described, also carries layer and MAC messages, and is accessed by mobile stations using the same multiple access scheme Data rates supported include ... Uses channel encoder of rate 1/4 The access channel transmits layer and MAC layer messages from different mobile stations to a base station Multiple users access this channel using a mechanism ... A-bis interface There may be one or more base station controllers in a serving area BTSs and the associated BSCs for a given area are together known as a base station subsystem (BSS) The MSC is...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_6 pdf

Danh mục: Kỹ thuật lập trình

... Subsystem—Serving GPRS Support Node (BSS-SGSN) Interface; Network Service [20] GSM 08.18: Base Station Subsystem—Serving GPRS Support Node (BSS-SGSN); Base Station Subsystem GPRS Protocol (BSSGP) ... Center—Base Station Subsystem (MSC-BSC) Interface: Layer Specification [18] GSM 08.14: Base Station Subsystem—Serving GPRS Support Node (BSS-SGSN) Interface; Gb Interface Layer [19] GSM 08.16: Base Station ... random access channel) The network replies by reserving the necessary resources required by the MS and sending a packet immediate assignment message In this case, the access method completes in a single...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_7 potx

Danh mục: Kỹ thuật lập trình

... 12 RACH subchannels, each containing five access slots The UE may select any one of these slots on the available RACH subchannels within an access service class and commence transmission The ... describe only one of them, namely the one that controls transmissions on a RACH AM FL Y Transmission Control on a RACH For the purpose of accessing this channel, the access slots and preamble signatures ... uses a number of system parameters including, among others, preamble scrambling code, available RACH subchannels for each access service class, the maximum number of preamble retransmissions,...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_8 potx

Danh mục: Kỹ thuật lập trình

... subscriber server (HSS), which is similar to the HLR of 2G and 2Gϩ networks, is a database of all subscribers to the home system It contains the user identity, call features and services subscribed ... channels to be used for signaling purposes within the system, options supported by the system, cell selection parameters, and so on The protocol responsible for providing RR messages between an MSC ... Telecommunications Industry Association/Electronics Industry Association (TIA/EIA) standard IS-41 [5], which is shown in Figure 7-1 This also represents the network for the first generation systems that support...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_9 pptx

Danh mục: Kỹ thuật lập trình

... RESV messages and determines if it has enough resources to meet the desired QoS If it does, it assigns a service class to the user s packets corresponding to the requested QoS, reserves necessary ... service class of each packet is examined If the associated service class matches the service class assigned in the request phase, the packet is treated for forwarding purposes using the scheduler ... objects: INTEGRITY, SESSION, RSVP_HOP, TIME_VALUES, RESV_CON- Figure 9-7 Message formats of RSVP messages Examples of objects are ADSPEC, FLOWSPEC, and so on Each object specification is of variable...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_10 pdf

Danh mục: Kỹ thuật lập trình

... Association of Radio Industries and Business ARP Address Resolution Protocol ARQ Automatic Repeat Request AS Access Stratum ASC Access Service Class ATM Asynchronous Transfer Mode AUC Authentication ... chapter, we have discussed QoS issues and concepts and described how it can be provided in 3G UMTS networks Providing the QoS usually consists of four steps: requesting resources from the network ... address However, it is still necessary to Quality of Service (QoS) in 3G Systems 329 reserve resources along the new route, and packets may be lost as resources are being reserved Summary In this...

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McGraw Hill - 2002 - W-CDMA and cdma2000 for 3G Mobile Networks_11 potx

Danh mục: Kỹ thuật lập trình

... SMG Special Mobile Group SMS Short Messaging Service SM-SC Short Messaging Service Center SMS-IWMSC SMS Interworking MSC SMS-GMSC SMS Gateway MSC SNDC Subnetwork-Dependent Convergence SNDCP Subnetwork-Dependent ... filters, 91 broadcast common channel, cdma2000, 144 broadcast control channels, GSM, 169 BSCs (Base Station Controllers), GSM, 158 BSS (Base Station Subsystem), GSM, 158 BSSGP (Base Station System ... Multiple Access DSCH Downlink Shared Channel DSCP Differentiated Service Code Point DSMA-CD Digital Sense Multiple Access with Collision Detection DSP Digital Signal Processing DSSS Direct-Sequence Spread...

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CDMA and cdma2000 for 3G Mobile Networks_1 doc

Danh mục: Hệ điều hành

... decode each user sequence as unambiguously as possible in the presence of noise, it is necessary that for j Ͼ 0, the value of C(j) be as small as possible compared to N Similarly, the cross-correlation ... cdma2000, Walsh codes used on traffic channels may vary from to 128 chips IS-95 uses a set of 64 fixed-length Walsh codes to spread forward physical channels For example, Walsh code is assigned to ... across successive chip periods is very small, that is, R(nt) is very small for nϾ compared to its value for n ϭ 0, copies of the desired signal can be extracted if their associated delays are...

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CDMA and cdma2000 for 3G Mobile Networks_2 pdf

Danh mục: Hệ điều hành

... system so as to serve areas of high traffic density by using smart antennas Possible benefits of using smart antennas in 3G systems have been studied under the auspices of the Technology in Smart ... mobile station First, consider a synchronous CDMA system Since it uses a system-wide timing reference based on the Global Positioning System (GPS), symbols transmitted by individual mobile stations ... Spread Spectrum CDMA Systems for Wireless Communications Boston: Artech House, 1997 [22] S Verdu, “Minimum Probability of Error for Asynchronous Gaussian Multiple -Access Channels,” IEEE Trans...

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CDMA and cdma2000 for 3G Mobile Networks_3 pptx

Danh mục: Hệ điều hành

... channel, like the reverse access channel just described, also carries layer and MAC messages, and is accessed by mobile stations using the same multiple access scheme Data rates supported include ... Uses channel encoder of rate 1/4 The access channel transmits layer and MAC layer messages from different mobile stations to a base station Multiple users access this channel using a mechanism ... A-bis interface There may be one or more base station controllers in a serving area BTSs and the associated BSCs for a given area are together known as a base station subsystem (BSS) The MSC is...

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CDMA and cdma2000 for 3G Mobile Networks_4 ppt

Danh mục: Hệ điều hành

... Subsystem—Serving GPRS Support Node (BSS-SGSN) Interface; Network Service [20] GSM 08.18: Base Station Subsystem—Serving GPRS Support Node (BSS-SGSN); Base Station Subsystem GPRS Protocol (BSSGP) ... Center—Base Station Subsystem (MSC-BSC) Interface: Layer Specification [18] GSM 08.14: Base Station Subsystem—Serving GPRS Support Node (BSS-SGSN) Interface; Gb Interface Layer [19] GSM 08.16: Base Station ... random access channel) The network replies by reserving the necessary resources required by the MS and sending a packet immediate assignment message In this case, the access method completes in a single...

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CDMA and cdma2000 for 3G Mobile Networks_5 pdf

Danh mục: Hệ điều hành

... 12 RACH subchannels, each containing five access slots The UE may select any one of these slots on the available RACH subchannels within an access service class and commence transmission The ... describe only one of them, namely the one that controls transmissions on a RACH AM FL Y Transmission Control on a RACH For the purpose of accessing this channel, the access slots and preamble signatures ... uses a number of system parameters including, among others, preamble scrambling code, available RACH subchannels for each access service class, the maximum number of preamble retransmissions,...

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