Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P3 ppt

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P1 ppt

... release of Aglets.1.1.3 ConcordiaConcordia was developed by Mitsubishi Electric Information Technology Center, USA.The main component of the Concordia system is the Concordia server that provides ... relevant pool. An empty pool indicates that the associated SCP cannot accept morerequests of that type from the SSP. Tokens are periodically assigned to pools by an MB-DISTRIBUTOR, which uses an ... on-demand provision of customized servicesvia dynamic agent downloading from the provider system to the customer system ordirectly to the network resources. MAs have the capability to migrate...

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P2 pdf

... ofdownloading service programs is done off-line and does not impact signaling performance.MAs enable both temporal distribution (i.e., distribution over time) and spatial distri-bution (i.e., distribution ... betweendifferent hosts, execute certain tasks, and collaborate with other agents.2.3: MAs enable both temporal distribution (i.e., distribution over time) and spatialdistribution (i.e., distribution ... and spatial dis-tribution (i.e., distribution over different network nodes) of service logic. In multimediaservices, the porting of services usually occurs between IN elements of different types(SSPs...

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P3 ppt

... 2Station 3Station 4Station 5DIFS DIFS DIFS DIFSFrameFigure 3.3 Basic access mechanism.be idle for a time interval greater than a Distributed Interframe Space (DIFS), the stationtransmits ... coverage is divided into 4, 8, 12,16, or 24 sectors.The user accesses the network through Hybrid Fiber Radio (HFR), Radio To TheBuilding (RTTB) and Radio To The Curb (RTTC). In HFR, a Radio Frequency ... the radio interface ofwireless users. The architecture of ATM multiplexer with radio cell has a central BS andWTs, and can be viewed as a distributed, virtual ATM multiplexer with a radio interfaceinside....

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P4 docx

... scheme with the shared medium. The medium access cycle isdivided into time slots that form CBR channels. Four types of channels are distinguishedby their purpose, direction, and bandwidth. ... slot is divided into a TA slot and an RA minislot. TheRA channel in ARCMA is capable of carrying additional information for differentclasses of ATM service (e.g., CBR, VBR, etc.). This additional ... divided into a TA slot and an RA-minislot.However, the RA channel in ARCMA is capable of carrying additional information fordifferent classes of ATM service (e.g., CBR, VBR, etc.). This additional...

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P5 ppt

... or without depending on any particular interaction model.Intermediaries are essential parts of building distributed systems that scale to the Web.Intermediaries can act in different capacities ... horizontal (between peers) dimension.Intermediaries are essential parts of building distributed systems that scale on theWeb. As a result, XML Protocol must support intermediaries. Because XML Protocolseparates ... Protocolseparates the message envelope from the transport binding, two types of intermediariesare possible – transport intermediaries and processing intermediaries.With the introduction of XML and RDF schema...

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P6 ppt

... message and a URI indicating a service. Themessage is presented to the end user upon reception, and the user is given the choiceto either start the service indicated by the URI immediately or to ... URL)Call indicationPlay messageService IndicationHello Figure 6.12 Voice mail.WAP PUSH ARCHITECTURE 1054. The user is notiﬁed about the SI by a message delivered with the SI. The user choosesto ... existence of gateway functionality responsible for encoding anddecoding data transferred from and to the mobile client. The purpose of the encodingcontent delivered to the client is to minimize...

Tài liệu Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P7 doc

... usedto label media feature values associated with the presentation of data (e.g., display res-olution, color capabilities, audio capabilities, etc.). To describe a proﬁle, Conneg usespredicate expressions ... matching is performed by ﬁnding the featureset that matches two (or more) proﬁles. This involves ﬁnding the feature predicate that isequivalent to the logical-AND of the predicates being matched.Conneg ... content. Depending on the format of the documentproﬁle, the translation can be done in different ways.8. In the case of a dedicated XML-based format, mapping the XML Schema for thededicated format...

Điện thoại di động giao thức viễn thông cho các mạng dữ liệu P8

... solid walled building to several 1000 ft outdoors, in directLine of Sight (LOS). This is of a similar order of magnitude as the distance that can becovered by the wired LAN in a building. However, ... Industrial, Scientiﬁc, and Medical(ISM) band, the radio system must use a modulation technique called Spread Spectrum(SS). In this mode a radio is required to distribute the signal across the ... form the Distribution System (DS), which is an architectural componentused to interconnect BSSs. IEEE 802.11 logically separates the Wireless Medium(WM) from the Distribution System Medium (DSM)....

Tài liệu Điện thoại di động mạng lưới Radio P1 doc

... RadioTETRA digitalSatellite RadioBroadband RadioCellular RadioData Packet RadioTrunked RadioPaging SystemsTelephonyCordless1974: PrivateMPT 1327Mobile RadioD-Netz digital1998: IridiumFigure ... the digitalization of speech and the use of source and chan-nel coding. Existing analogue radio systems are therefore being replaced moreand more by digital mobile radio networks. Modern digital ... digital1992: Data RadioModacomINMARSAT-C1988:LEO Satellite Sys.W-ATM2000:1997:1996:W-LAN 802.11 HIPERLAN/12002: UMTS1991: DECTdigital1991: Trunked Radioanalogue1995: Trunked RadioTETRA...

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