Unit-3 Wireless Data Services
|
|
- Whitney Caldwell
- 5 years ago
- Views:
Transcription
1 Unit-3 Wireless Data Services
2 CPDP(Cellular Digital Packet Data) CPDP technology is used by telecommunication carriers to transfer data to users via unused analog cellular networks. It uses the entire 30KHz channel of AMPS on shared basis. No extra bandwidth required as it overlays itself on AMPS radio channels. Inexpensive and easy to construct. CPDP doesn t use MSC for routing, rather it has its own traffic routing capabilities. CPDP radio channel varies with time.
3 CPDP(Cellular Digital Packet Data) Every CPDP channel is duplex in nature with conventional first generation AMPS.
4 CDPD Infrastructure
5 CDPD - Layering Application Transport Network Data link Physical Network layer IP/CLNP RRMP MDLP MAC Physical CDPD Layer Connectionless Network Protocol Radio Resource Management Protocol Mobile Data Link Protocol Media Access Control Physical
6 CDPD Physical Layer 30KHz BW channels, shared with AMPS Separate forward and reverse channels Forward channel is continuous Reverse channel is multiple access. Gaussian Minimum-Shift Keying-GMSK GMSK compromises between channel bandwidth and decoder complexity. 19.2kbps per channel. IP/CLNP RRMP MDLP MAC Physical
7 CPDP Data Link Layer-MDLP Provides logical data link connections on a radio channel by using the address contained in each packet frame. Takes care of the packet sequence control. Error detection and flow control of the packets.
8 CPDP-Layer 3-RRMP Manages radio channel resources of a CPDP system and enables M-ES to find the radio channel without interfering with the AMPS communication. Handles BS identification and configuration messages for all M-ES stations. Handles channel hopping commands, cell handoffs and M-ES change of power commands.
9
10 AMPS and CDPD CDPD runs alongside AMPS AMPS system is unaware of CDPD system CDPD system watches AMPS behavior AMPS generally has unused channels. Blocked calls when all channels are allocated. 1% block probability => all channels used only 1% of the time. Every time MSC chooses a channel for the BS, 30% of channel time is unused, which is exploited by the CPDP network.
11 Effects of CDPD on AMPS CDPD logically transparent to AMPS Can reduce AMPS service quality More channel usage by CDPD => increased interference.
12 Problems with CDPD Limited bandwidth 19.2kbps shared per channel Modern applications demand more bandwidth. Security Man in the middle identity theft attack IP network attacks Denial of Service attacks easy.
13 Potential Improvements Multichannel / multicarrier transmission Would allow faster rates with AMPS compatibility. Security Improvements Secure against man-in-the-middle attacks. Switch to CDMA/GSM. Digital cellular services are more able to accommodate data services.
14 ARDIS(Advanced Radio Data Information Systems) Channel Characteristics of ARDIS Type of Message Retry Rate Packet Overhead Short ARDIS message Long ARDIS message Low High High Spread over the lgt. Of the packet
15
16 RAM Mobile Data (RMD) named MOBITEX
17
18 Common channel signaling CCS is a digital communication technique that provides simultaneous transmission of User Data and signaling data and other control information. Some common signaling functions in Telephone circuits are: Dial tone Transmission of digits Ringing Busy tone; etc. Signaling can be classified into two groups In channel signaling: Signaling is a part of data/voice channel itself Inband Out of band 18
19 Areas of Signaling There are mainly three areas of signaling during a telephone call between subscribers and exchanges. within exchanges. between exchanges. between exchanges Exchange A Exchange B within exchange between Subscriber and exchange
20 In - Band Signaling Signaling path = voice path Voice path clogged with signaling Busy calls, congestion, and ring-no-answers result in 20-35% of incomplete calls Slower call setup due to channel sharing
21 Signaling Techniques In-channel signaling In-band
22 Out - of - Band Signaling Signaling path done on a separate channel Voice path dedicated only to voice Much faster call setup and knockdown Led to SS7 and Advance Intelligent Network(AIN) Can be operated in connectionless fashion as the signaling traffic is bursty and is of short duration, efficiently utilizing the packet data transfer techniques. Packet sizes are variable in length.
23 Signaling Techniques Common Channel Signaling (CCS) Signaling Network Dedicated data link between systems Out-band
24 Advantages of CCS One signaling path needed per trunk group Faster and simpler to transfer information between control processors No possibility of interference with speech path Signaling can t be accessed by customer
25 Advantages of CCS Value-added services of a signaling control point Shared processing for small offices Allows centralized decision making (flow mgmt) Permits Advanced Intelligent Network (AIN) services
26 Advantages of CCS Higher signaling capacity. More number of speech/data channels as there is only one signaling channel. Central offices can exchange information, not related to speech/data between themselves e.g. subscriber data. Various high end features like roaming are possible by using CCS7.
27 Trunk Group Disassociated CCS Signaling Switching Center Speech Paths CCS Data Link
28 Trunk Group Associated CCS DLC TR-303 Trunk Group CO Switch TR-303 Control Link
29 Trunk Group Associated CCS DLC TR-303 Trunk Group CO Switch TR-303 Control Link
30 Common Channel Signaling N/W Architecture Based on SS7 SEP s-switching End Points SS7-Signaling System No.7 STP s-signaling transfer Points SMS-Service Management System
31 CCS The MSC provides subscriber to access to the PSTN via SEP. SEP implements a stored-program-control switching system known as SCP (Service Control Point). SCP uses CCS to set-up calls and to access the network database. SCP instructs the SEP to create a billing record based on call information recorded by SCP.
32 The STP controls switching messages between nodes in the CCS network. For higher reliability of transmission SEP s are required to be connected to the SS7 network via atleast two STP s, which ensures the connection to the network even if one STP fails. The SMS contains all subscriber records which may be accessed by the subscribers. DBAS( Data Base Service Management System) is another managing service of the user database which helps in fraud detection.
33 ISDN Integrated Services Digital Network It is a switched digital telecommunication line that can be delivered over regular copper wires Possible to provide end-to-end digital communications Based on the concept of CCS Designed to ease the PSTN s working environment and increase the efficiency.
34 ISDN provides two distinct kinds of signaling components: üaccess Signaling: Supports traffic between end users and the network. Defines the users access to PSTN and ISDN for services and depends on DSS1 protocol. Digital Subscriber Signaling System No.1 ünetwork Signaling: Governed by SS7 suite of protocols. For wireless, the SS7 protocols within ISDN provide the backbone network connectivity between MSC s throughout the world., as they provide N/W interfaces for CCS traffic.
35 ISDN Two basic types of channels in ISDN: Bearer Channels(B Channels)-Exclusives for enduser traffic(voice, Data and Video) Data Channels(D Channels)-Out of band signaling channels, used to send signaling and control across the interfaces to end-users.
36 What Is ISDN?
37 ISDN Basic Characteristics B Channels 64 Kbps D Channel Kbps Data Data Data Signaling
38 ISDN Benefits Carries a variety of user traffic, such as digital video, data, and telephone network services, using the normal phone circuit-switched network Offers much faster call setup than modems by using out-of-band signaling (D channel) Often less than one second Provides a faster data transfer rate than modems by using the 64-kbps bearer channel (B channel) Can combine multiple B channels to bandwidth of 128 kbps.
39 Bonding of B Channels or BOD (Bandwidth on Demand) Channel Bonded on Demand B (64 Kbps) Kbps Kbps B (64 Kbps) Inverse Multiplexers with Dynamic Bonding
40
41 ISDN ISDN users can select two different interfaces, Basic Rate Interface(BRI): Serves small capacity terminals(single phones) Primary Rate Interface(PRI):Serves large capacity terminals(pbx) B-Channel supports 64kbps data for both the BRI and PRI. D-Channel supports 64kbps data for PRI and 16kbps for PRI.
42 ISDN BRI Provides 2 X 64kbps bearer channels and 1 X 16kbps signaling channel(2b+d) PRI Provides 23X 64kbps bearer channels and 1 X 64kbps signaling channel(23b+d) (North America & Japan) Provides 30X 64kbps bearer channels and 1 X 64kbps signaling channel(23b+d) (Europe) For wireless subscribers, ISDN s BRI is provided same as for a fixed terminal. Extra control channels (c-channels) which replace D-channels are used. The wireless subscribers has 2B+C service.
43 Types of bearer services in ISDN Mode of Service Type of Service Transmission Speed Type of channel Circuit Mode services Unrestricted 64kbps,384kbps, 1.5 Mbps B,H0,H11 Circuit Mode services Packet Radio Services Speech 64kbps B Unrestricted Depending on throughput B,D(or C)
44 Broadband ISDN and ATM üincrease in bandwidth is the main criteria in the development of B-ISDN and ATM(Asynchronous Transfer Mode) technologies which depend on packet switching rates upto 2.4Gbps in comparison to 64 kbps provided by ISDN B-channel. üatm is a packet switching and multiplexing technique designed to handle both voice users and packet data users in a single physical channel. üdata Rates: 64kbps-twisted pair to 100Mbps over OF cables.
45 ATM Preserves the order transmission of packets of fixed length between two end users. Fixed length packets have been chosen for packets to arrive synchronously at the switch. 5 bytes 48 bytes Header Data Cell Format of ATM ATM data units are called CELLS.
46 ATM Cells are routed based on header information based on each unit(called label), which identifies the cell as belonging to a specific ATM virtual connection. Once the label is determined i.e., a user is chosen the connection remains till the end of the virtual connection. ATM header also includes data for congestion control, priority information for queuing of packets, and priority indicating the drop of packets in case of congestion in N/W.
47 Signaling through SS7 network SS7 was first standardized by CCITT for ISDN in 1980 with revisions in 1984 and Control messages flowing through the network are in packets. However, it controls the circuit switched network. Transmission rate up to 64 Kbps in 1G. The purpose of SS7 is to provide an internationally standardized general-purpose common channel signaling system. Management functions performed by SS7 are: Call setup Maintenance of call and Call termination 47
48 Signaling through SS7 network Salient characteristics of SS7 are: High availability/high reliability; Low transit delay; Traffic management and fault isolation; Automatic congestion detection SS7 is highly reliable because it has at least one alternate path around any network node. For achieving low transmission delay, the network works at relatively high speeds of 56 Kbps & 64 Kbps.
49
50 SS7-Signaling System Number 7 NSP-N/W Service Part-Provides highly reliable means of exchanging signaling traffic using connectionless services. NSP also allows world wide communication without the concern of the application and signaling traffic. SCCP- Support packet data as well as connection oriented networking. MTP- Ensures that the signaling traffic can be transferred and delivered reliably between end users and the network.
51 SS7 Signaling data link functions: MTP Level 1- Provides interface to actual physical channel over which communications take place. CCITT-MTP-1 uses 64 kbps. ANSI-MTP1 uses 56kbps. Signaling link functions : MTP Level 2- Correspond to second layer in OSI. Provides reliable link to transfer of traffic between two directly connected signaling points. MSU s are defined here which are variable packet units(max-272 octets & 16 bit CRC)
52 SS7 MTP2 also provides flow control b/w two signaling points. Signaling Network Functions-MTP-3: They provide procedures that transfer msgs b/w signaling nodes. Two functions(isdn) - Signaling Handling Functions-For routing, distribution and traffic discrimination. - Signaling function Management-Allows to reconfigure the network in case of node failures providing alternate routes to navigate the packet.
53
54 SS7 User Part: Provides call control & management functions and call set-up capabilities to the network. They use the transport facilities provided by MTP and the SCCP. SS7 user part: - ISDN User Part(ISUP) 1.Telephone User Part(TUP) 2.Data User Part(DUP) - Transaction Capabilities Application Part(TCAP) - Operations maintenance & Administration Part(OMAP)
55 ISUP: Provides signaling functions for carrier and supplementary services for voice, data and video in an ISDN environment. ISUP uses MTP for transfer of messages between different exchanges. User-to-User signaling, closed user groups, calling line identification, and call forward are also provided. TCAP: Refer to application layer in OSI, which invokes the services of the SCCP and the MTP in a hierarchical format. It is concerned with remote operations.
56 SS7 User Part OMAP: Includes monitoring, coordination, and control functions to ensure that trouble free communications are possible. Signaling traffic under SS7: Call set-ups, Inter MSC handoff s and Location updates
57
58 A Typical SS7 Network
59 Message Types: SS7 network Two types of messages flow through the network: Circuit related Database related Circuit-related messages are used to set up and tear down a call between two switches or signaling points; STP transfers these messages from the originating signaling point to the terminating signaling point. Database access messages are used to access information stored in the SCP. A query message is sent from the SSP, via the STP, to the SCP requesting that required data be sent to the requesting SSP. The SCP returns the data in a response message over SS7 network, back to the originating signaling point. In the case of a cellular signaling network, the SSP includes the functions of the mobile switching center (MSC). 59
Signaling System 7 (SS7) By : Ali Mustafa
Signaling System 7 (SS7) By : Ali Mustafa Contents Types of Signaling SS7 Signaling SS7 Protocol Architecture SS7 Network Architecture Basic Call Setup SS7 Applications SS7/IP Inter-working VoIP Network
More informationSS7. Mercantec H2 2009
SS7 Mercantec H2 2009 Common Channel Signaling System No. 7 basic call setup, management, and tear down wireless services such as personal communications services (PCS), wireless roaming, and mobile subscriber
More informationUNIT II NETWORKING
UNIT II INTRODUCTION TO WIRELESS NETWORKING Wireless Network The cellular telephone system is responsible for providing coverage throughout a particular area known as coverage region or market The interconnection
More informationTELECOMMUNICATION SYSTEMS
TELECOMMUNICATION SYSTEMS By Syed Bakhtawar Shah Abid Lecturer in Computer Science 1 Signaling System 7 Architecture Signaling System 7 Protocol Stacks Overview Level 1: Physical Connection SS7 Level 2:
More informationWilliam Stallings Data and Computer Communications 7 th Edition. Chapter 10 Circuit Switching and Packet Switching
William Stallings Data and Computer Communications 7 th Edition Chapter 10 Circuit Switching and Packet Switching Switching Networks Long distance transmission is typically done over a network of switched
More informationAdvanced Intelligent Network for Wireless Communications
www..org Advanced Intelligent Network for Wireless Communications 6 Pooja Sharma 1 Pawan Bhadana 2 1 B.S.Anangpuria Institute of Technology and Management, Faridabad, Haryana, India Poojasharma161@gmail.com
More information2000 Performance Technologies, Inc.
Table of Contents SS7 Tutorial...1 SS7 Tutorial...3 Overview...3 SS7 Protocol Stack...6 Message Transfer Part...7 ISDN User Part...13 Signaling Connection Control Part...20 Transaction Capabilities Application
More informationTelecommunication Services Engineering Lab
Logistics Instructor Office: EV006-227, Tel: 1-514-8482424 ext 5846, Email: Glitho@ciiseconcordiaca URL: http://wwwececoncordiaca/~glitho/ Office hours: Friday: 3 pm 5 pm Time: Friday, 17h45-20h15 Room
More informationTelecommunication Services Engineering Lab
Logistics Instructor Office: EV007-647, Tel: 1-514-8482424 ext 5846, Email: Glitho@ciiseconcordiaca URL: http://wwwececoncordiaca/~glitho/ Office hours: Tuesday: 3 pm 5 pm Time: Usually: Tuesday, 17h45-20h15
More informationChapter 10: Wireless Networking. School of information science and Engineering, SDU
Chapter 10: Wireless Networking School of information science and Engineering, SDU 10.1 Introduction to Wireless Networks Requirement to the networks: Provides ubiquitous personal communications; Accommodate
More informationCircuit Switching and Packet Switching
Chapter 10: Circuit Switching and Packet Switching CS420/520 Axel Krings Page 1 Switching Networks Long distance transmission is typically done over a network of switched nodes Nodes not concerned with
More informationTELECOMMUNICATION SYSTEMS
TELECOMMUNICATION SYSTEMS By Syed Bakhtawar Shah Abid Lecturer in Computer Science 1 INTEGRATED SERVICES DIGITAL NETWORKS (ISDN) The original concept of ISDN dates back to the early 1970s. Its design,
More informationSignaling System No. 7 (Zeichengabesystem Nr. 7)
Signaling System No. 7 (Zeichengabesystem Nr. 7) SS#7, SS7,... Common Channel Signaling System No. 7, C7, CCS7,... (ZGS-Nr. 7) www.comnets.uni-bremen.de SS7-10 - 1 Terms (Begriffe) Communication Networks
More informationINSE 7110 Winter 2004 Value Added Services Engineering in Next Generation Networks Week #1. Roch H. Glitho- Ericsson/Concordia University
INSE 7110 Winter 2004 Value Added Services Engineering in Next Generation Networks Week #1 1 Outline 1. Essentials of circuit switched telephony 2. Introduction to value added services 3. IN fundamental
More informationChapter 4 Transmission Systems and the Telephone Network. School of Info. Sci. & Eng. Shandong Univ.
Chapter 4 Transmission Systems and the Telephone Network School of Info. Sci. & Eng. Shandong Univ. Skip in Chapter 3 Articles 3.8.7, 3.8.8 (polynomial math for CRC codes) Skip in Chapter 4 4.2.2 (SONET
More informationWIRELESS INTELLIGENT NETWORKING (WIN) FATİH ERTÜRK
WIRELESS INTELLIGENT NETWORKING (WIN) FATİH ERTÜRK 2010514027 Today's wireless subscribers are much more sophisticated telecommunications users than they were five years ago. No longer satisfied with just
More informationA typical WAN structure includes the following components.
CBCN4103 WAN is a computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more LANs. A WAN is a network usually provided by a specialised company called a
More informationTELECOMMUNICATION SYSTEMS
TELECOMMUNICATION SYSTEMS By Syed Bakhtawar Shah Abid Lecturer in Computer Science 1 SS7 Network Architecture SS7 can employ different types of signaling network structures. The worldwide signaling network
More informationChapter 5. Voice Network Concepts. Voice Network Concepts. Voice Communication Concepts and Technology
Chapter 5 Voice Communication Concepts and Technology Voice Network Concepts Telephone switchboard - Circa 1898 Voice Network Concepts Telephone calls are connected from source via circuit switching. Circuit
More information[1] Wireless and Mobile Network Architectures,Y-Bing Lin and Imrich Chlamtac,Wiley Computer Publishing
Signaling System 1 Reference (1/2) [1] Wireless and Mobile Network Architectures,Y-Bing Lin and Imrich Chlamtac,Wiley Computer Publishing Chapters 2 and 5. [2] 第七號共通信號系統概論, 湯鴻沼, 全華科技圖書股份有限公司 [3] Telephone
More informationSS#7. T Jouni Karvo, Timo Kiravuo
SS#7 T-110.300 Jouni Karvo, Timo Kiravuo Telephone exchanges Subscriber lines are connected to the telephone exchanges Originally each customer had a direct connection (electrical pair) to the exchange
More informationCourse 5 The SS7 signaling systems.
Course 5 The SS7 signaling systems. Zsolt Polgar Communications Department Faculty of Electronics and Telecommunications, Technical University of Cluj-Napoca General aspects; The SS7 architecture; Node
More informationTelephone network. T Jouni Karvo, Raimo Kantola, Timo Kiravuo
Telephone network T-110.300 Jouni Karvo, Raimo Kantola, Timo Kiravuo Telephone network Background Topology Reference connection End systems Access network Transmission Switching & Signaling Layers User-Network
More informationTelephone network. Telephone network. Background. T Jouni Karvo, Raimo Kantola, Timo Kiravuo
Telephone network T-110.300 Jouni Karvo, Raimo Kantola, Timo Kiravuo Telephone network Background Topology Reference connection End systems Access network Transmission Switching & Signaling Layers User-Network
More informationChapter 1 Introduction
Emerging multimedia, high-speed data, and imaging applications are generating a demand for public networks to be able to multiplex and switch simultaneously a wide spectrum of data rates. These networks
More informationCh.16 - Wireless WAN System Architectures
Ch.16 - Wireless WAN System Architectures 1 Wireless WAN 2 GSM via PSTN 3 GSM via ISDN 4 GPRS 5 Mobitex 6 CDPD 7 PPDC 8 UMTS 9 Future Systems 10 Systems Summary 1 11 Systems Summary 2 1 This section will
More informationLecture (05) Network interface Layer media & switching II
Lecture (05) Network interface Layer media & switching II By: ElShafee ١ Agenda Circuit switching technology (cont,..) Packet switching technique Telephone network ٢ Circuit switching technology (cont,..)
More informationInternet Architecture and Protocol
Internet Architecture and Protocol Set# 04 Wide Area Networks Delivered By: Engr Tahir Niazi Wide Area Network Basics Cover large geographical area Network of Networks WANs used to be characterized with
More informationSignallingSystems and Management
SignallingSystems and Management Introduction to SS7 Krzysztof Wajda AGH, Telecommunications Department October, 2016 Outline Common channel signalling SS7 structure and architecture Signalling points
More informationWireless Signaling and Intelligent Networking
3 Wireless Signaling and Intelligent Networking The first two chapters provided an introduction to the history of mobile communications, its evolution, and the wireless industry standards process. With
More informationCircuit-Switching Networks Traffic and Overload Control in Telephone Networks
6 Fall 2016, German University in Cairo Chapter 4 Circuit-Switching Networks Traffic and Overload Control in Telephone Networks 6 Fall 2016, German University in Cairo Traffic Management & Overload Control
More informationWAN Technologies CCNA 4
WAN Technologies CCNA 4 Overview Note: Most of this will be described in more detail in later chapters. Differentiate between a LAN and WAN Identify the devices used in a WAN List WAN standards Describe
More informationATM-SS7 Interworking. Public Narrowband SS7 Network. Central Office. Subscriber. Copyright Hughes Software Systems Ltd., 1999
ATM-SS7 Interworking White Paper from Hughes Software Systems Discusses the Evolution of Communication Networks and the convergence of voice and data networks Asynchronous transfer mode (ATM) signaling
More informationINTEGRATED SERVICES DIGITAL NETWORK (ISDN) SERVICE CONTENTS SECTION 11
Original Page 1 INTEGRATED SERVICES DIGITAL NETWORK (ISDN) SERVICE CONTENTS SECTION 11 A. GENERAL B. REGULATIONS C. RATES Original Page 2 A. GENERAL INTEGRATED SERVICES DIGITAL NETWORK (ISDN) SERVICE 1.
More informationM242 COMPUTER NETWORS AND SECURITY
M242 COMPUTER NETWORS AND SECURITY 2.1. Network Models: UNIT - II OSI MODEL AND LAN PROTOCOLS 1. Explain Network model A network is a combination of hardware and software that sends data from one location
More informationISDN. Integrated Services Digital Network
ISDN Integrated Services Digital Network definition of ISDN evolution to ISDN and beyond ISDN services basic BRA / PRA architecture protocols & signalling What is ISDN? 1. End-to-end digital connectivity
More informationABSTRACT 1 INTRODUCTION
Providing Voice Privacy as a Service over the Public Telephone Network # Mohamad Sharif and Duminda Wijesekera Center for Secure Information Systems Department of Information and Software Engineering,
More informationCOMPUTER NETWORK Model Test Paper
Model Test Paper Question no. 1 is compulsory. Attempt all parts. Q1. Each question carries equal marks. (5*5 marks) A) Difference between Transmission Control Protocol (TCP) and User Datagram Protocol.
More informationCellular Communication
Cellular Communication Cellular Communication Cellular communication is designed to provide communications between two moving units, or between one mobile unit and one stationary phone or land unit (PSTN).
More informationSwitched Multimegabit Data Service
CHAPTER 14 Chapter Goals Tell how SMDS works, and describe its components. Describe the operational elements of the SMDS environment, and outline its underlying protocol. Discuss related technologies.
More informationSwitched Multimegabit Data Service (SMDS)
CHAPTER 14 Switched Multimegabit Data Service (SMDS) Background Switched Multimegabit Data Service (SMDS) is a high-speed, packet-switched, datagram-based WAN networking technology used for communication
More informationOverview of Networks
CMPT765/408 08-1 Overview of Networks Qianping Gu 1 Overview of Networks This note is mainly based on Chapters 1-2 of High Performance of Communication Networks by J. Walrand and P. Pravin, 2nd ed, and
More informationend systems, access networks, links 1.3 network core
Chapter 1: roadmap 1.1 what is the Inter? 1.2 work edge end systems, works, links 1.3 work core packet switching, circuit switching, work structure 1.4 delay, loss, throughput in works 1.5 protocol layers,
More informationCommunication Networks
Communication Networks Chapter 3 Multiplexing Frequency Division Multiplexing (FDM) Useful bandwidth of medium exceeds required bandwidth of channel Each signal is modulated to a different carrier frequency
More informationWireless and Mobile Network Architecture
Wireless and Mobile Network Architecture Chapter 2: Mobility Management Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National Taipei University Sep. 2006 1 Outline Introduction
More informationModule 3. Wide Area Networking (WAN)
Module 3 Wide Area Networking (WAN) When many nodes or LAN s are connected together in a large scale, we have a WAN. This may be world wide. Because of the separation of the nodes, the Public Data Network
More informationSample. Overview of WAN Connections. Objectives. Module 1
Module 1 Objectives This module introduces the basic elements of WAN connections and describes the role each element plays in creating that connection. After completing this module, you should be able
More informationIntegrated Service Digital Network (ISDN) Circuit-Switched and Packet-Switched Data Bearer Services Performance Specifications TR ISSUE B
ISSUE B December 1996 Integrated Service Digital Network (ISDN) Circuit-Switched and Packet-Switched Data Bearer Services Performance Specifications Technical Reference NOTICE TR 73586 This Technical Reference
More informationISDN. Integrated Services Digital Network. definition of ISDN ISDN services basic BRA / PRA architecture protocols & signalling
ISDN Integrated Services Digital Network definition of ISDN ISDN services basic BRA / PRA architecture protocols & signalling What is ISDN? 1. End-to-end digital connectivity 2. Enhanced subscriber signaling
More informationNarrowband ISDN. (ISDN = Integrated Services Digital Network)
Narrowband ISDN (ISDN = Integrated Services Digital Network) critically: Invention Subscribers Don t Need (technology push instead of demand pull) is that really so? N-ISDN vs. B-ISDN (based on ATM) How
More informationNetworks 15.2 Multiplexing Technologies Access Networks 15.5 Common Peripheral Interfaces
Chapter 15 Computer and Multimedia Networks 15.11 Basics of Computer and Multimedia Networks 15.2 Multiplexing Technologies 15.3 LAN and WAN 15.4 Access Networks 15.5 Common Peripheral Interfaces 15.6
More informationInterworking Switched Circuit and Voice-over IP Networks Tutorial
Interworking Switched Circuit and Voice-over IP Networks Tutorial Definition The term operations support systems (OSSs) generally refers to the systems that perform management, inventory, engineering,
More informationCSIS Frequency Division Multiplexing. Basic Types of Multiplexing. Frequency Division Multiplexing. Frequency Division Multiplexing.
Multiplexing: combining information streams from multiple sources for transmission over a shared medium Demultiplexing: separating a combination back into individual information streams CSIS 4222 Ch 11:
More informationNetwork Systems for Emerging WAN Applications
Network Systems for Emerging WAN Applications Hitachi Review Vol. 48 (1999), No. 4 169 Akihiko Takase, D.Sc. OVERVIEW: This paper describes wide-area-network architecture from the viewpoints of networking
More informationIntegrated Services Digital Network
CHAPTER 12 Chapter Goals Explain what ISDN is. Describe ISDN devices and how they operate. Describe the specifications for ISDN data transmittal for the three layers at which ISDN transmits. Introduction
More informationChapter 8 Switching Networks
Chapter 8 Switching Networks Circuit Switching Networks SONET SONET Transport Networks Telephone Network and Signaling Traffic Control in Telephone Networks Cellular Telephone Networks Gateway WAN Switching
More informationPacket Switching Techniques
Packet Switching Techniques 188lecture3.ppt Pasi Lassila 1 Problem Aim: Build larger networks connecting more users also spanning different network technologies Shared media networks limited number of
More informationGENERAL SERVICES TARIFF P.S.C.-D.C.-No Verizon Washington, DC Inc. 1st Revised Page 1 Cancels Original Page 1
1st Revised Page 1 Cancels Original Page 1 A. GENERAL Centrex IntelliLinQ-Basic Rate Interface (BRI) is an optional service arrangement for use with Centrex Services. IntelliLinQ-BRI uses the Basic Rate
More informationPhysical Layer: Multiplexing, Spectrum Spreading and Switching. Covers Chapters# 06 & 08 from Text Book
Physical Layer: Multiplexing, Spectrum Spreading and Switching Covers Chapters# 06 & 08 from Text Book 2 Multiplexing From Chapter#06 3 Multiplexing If bandwidth of a medium linking two devices is greater
More informationIntroduction to Network Technologies & Layered Architecture BUPT/QMUL
Introduction to Network Technologies & Layered Architecture BUPT/QMUL 2015-3-5 Review What is the Internet? How does it work? When & how did it come about? Who controls it? Where is it going? 2 Agenda
More informationIntroduction to Wireless Networking ECE 401WN Spring 2008
Introduction to Wireless Networking ECE 401WN Spring 2008 Lecture 2: Communication Networks The first major topic we will study will be WLANs. But before that, we need to consider a few basics of networking.
More informationCh. 5 - ISDN - Integrated Services Digital Network
Ch. 5 - ISDN - Integrated Services Digital Network 1 Overview 2 Basic elements in ISDN 3 ISDN - access 4 ISDN - the bus 5 ISDN - examples 6 ISDN - between LAN s 7 ISDN - access to Internet 8 ISDN - small
More informationLecture 22 Overview. Last Lecture. This Lecture. Next Lecture. Internet Applications. ADSL, ATM Source: chapter 14
Last Lecture Lecture 22 Overview Internet Applications This Lecture ADSL, ATM Source: chapter 14 Next Lecture Wireless Networking Source: chapter 15 COSC244 & TELE202 Lecture 22 - ADSL, ATM 1 Modem Enable
More informationDigiPoints Series Volume 1. Leader Guide. Module 9 Network Architectures
Network Architectures Page 9.i DigiPoints Series Volume 1 Module 9 Network Architectures Summary This module describes the two primary arrangements by which signals are carried from one location to another:
More informationCENTREX intellilinq*-basic RATE INTERFACE (BRI) SERVICE*
1st Revised Page 1 Cancels Original Page 1 A. GENERAL CENTREX intellilinq*-basic RATE INTERFACE (BRI) SERVICE* Centrex INTELLILINQ-Basic Rate Interface (BRI) is an optional service arrangement for use
More informationLecture (04 & 05) Packet switching & Frame Relay techniques Dr. Ahmed ElShafee
Agenda Lecture (04 & 05) Packet switching & Frame Relay techniques Dr. Ahmed ElShafee Packet switching technique Packet switching protocol layers (X.25) Frame Relay ١ Dr. Ahmed ElShafee, ACU Fall 2011,
More informationLecture (04 & 05) Packet switching & Frame Relay techniques
Lecture (04 & 05) Packet switching & Frame Relay techniques Dr. Ahmed ElShafee ١ Dr. Ahmed ElShafee, ACU Fall 2011, Networks I Agenda Packet switching technique Packet switching protocol layers (X.25)
More informationLecture overview. Modifications and derivatives of GSM Data transmission in GSM: HSCSD GPRS part one EDGE
Lecture overview Modifications and derivatives of GSM Data transmission in GSM: HSCSD GPRS part one EDGE Modifications and derivatives of GSM Introduction of half-rate speech coding (BR 6.5 kb/s) Two users
More informationDESIGN AND DEVELOPMENT OF INTELLIGENT NETWORK FOR TELETALK BANGLADESH LIMITE
Daffodil International University Institutional Repository Proceedings of NCCIS November 2007 2007-11-24 DESIGN AND DEVELOPMENT OF INTELLIGENT NETWORK FOR TELETALK BANGLADESH LIMITE Dey, Ajoy Kumar Daffodil
More informationCOMPUTER NETWORKS MODEL QUESTION PAPER WITH SOLUTION. (c) Peer-to-peer processes are processes on two or more devices communicating at a
COMPUTER NETWORKS MODEL QUESTION PAPER WITH SOLUTION Q-1(a) In half-duplex transmission, only one entity can send at a time; in a full-duplex transmission, both entities can send at the same time. (b)
More informationNOTES 1 CCITT Recommendation Q.700 was published in Fascicle VI.7 of the Blue Book. This file is an extract from the Blue Book. While the presentation
INTERNATIONAL TELECOMMUNICATION UNION CCITT Q.700 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7
More informationSS7 Solution for Internet Access
Lucent Technologies Bell Labs Innovations Lucent Technologies Remote Access Business Unit SS7 Solution for Access Table of Contents 1.0 Introduction..................................................................1
More informationSystemy sygnalizacji
Systemy sygnalizacji i Zarządzania Sieciami System sygnalizacji nr 7-wprowadzenie Krzysztof Wajda Katedra Telekomunikacji AGH Październik, 2016 Goals of the course introduction of main problems and definitions
More informationThe product lifecycle - upgrading: Ring, Ring, East Coast Calling
The product lifecycle - upgrading: Ring, Ring, East Coast Calling Lecture 14: Unit 7a Disasters, Failures and other Dangerous Things Adapted from C. Hannon by L. Ball, 03.07.12 Topics Basics of Sound Telephones
More information2. Modelling of telecommunication systems (part 1)
2. Modelling of telecommunication systems (part ) lect02.ppt S-38.45 - Introduction to Teletraffic Theory - Fall 999 2. Modelling of telecommunication systems (part ) Contents Telecommunication networks
More informationModule 11 Narrowband and Broadband ISDN
Module 11 Narrowband and Broadband ISDN Lesson 37 ISDN: Reference Points, Services And Standards OBJECTIVE General This lesson is continued on giving the reader the concept and definition of Integrated
More informationCourse 4-5 Signaling techniques used in classical telephone networks. The SS7 signaling systems.
Course 4-5 Signaling techniques used in classical telephone networks. The SS7 signaling systems. Zsolt Polgar Communications Department Faculty of Electronics and Telecommunications, Technical University
More informationLocal Area Network Overview
Local Area Network Overview Chapter 15 CS420/520 Axel Krings Page 1 LAN Applications (1) Personal computer LANs Low cost Limited data rate Back end networks Interconnecting large systems (mainframes and
More informationPertemuan 7 GSM Network. DAHLAN ABDULLAH
Pertemuan 7 GSM Network DAHLAN ABDULLAH Email : dahlan.unimal@gmail.com Contents GSM-Introduction Architecture Technical Specification & Operation Frame Structure Channels Call Routing Security Characteristics
More informationTraffic Link Redundancy
Traffic Link Redundancy 80% of the traffic saved if one link goes down 2 separated routes 3 separated routes eg 10E per link then: 80*(10+10)=16E 80*(10+10+10)/2=16E The redundancy factor becomes 1.6 and
More informationCHAPTER -1. Introduction to Computer Networks
CHAPTER -1 Introduction to Computer Networks PRELIMINARY DEFINITIONS computer network :: [Tanenbaum] a collection of autonomous computers interconnected by a single technology. communications network ::a
More informationNetwork basics. Unit objectives Describe the basic components of a network Identify characteristics of network technologies Analyze the OSI model
Network basics Unit objectives Describe the basic components of a network Identify characteristics of network technologies Analyze the OSI model Topic A Topic A: Network concepts Topic B: Network architectures
More informationSecure Teleconferences over PSTN
Secure Teleconferences over PSTN ECE646 Fall 2004 George Mason University Talk outline Introduction Problem Background My ultimate goal Literature Survey Existing security service over PSTN Implementation
More informationTELECOMMUNICATION SYSTEMS
TELECOMMUNICATION SYSTEMS By Syed Bakhtawar Shah Abid Lecturer in Computer Science 1 Public Switched Telephone Network Structure The Local Loop Trunks and Multiplexing Switching 2 Network Structure Minimize
More informationAE64 TELECOMMUNICATION SWITCHING SYSTEMS JUNE Q2 (a) Write short notes on (a) uniselector and (b) two motion selector.
Q2 (a) Write short notes on (a) uniselector and (b) two motion selector. Uniselectors. A uniselector is a one which has a single rotary switch with a bank of contacts. Depending upon the number of switching
More informationEliminating the Last Mile Bottleneck
Eliminating the Last Mile Bottleneck P. Michael Henderson michael.henderson@cox.net 1 Agenda Technology and Market Drivers Performance Requirements VoDSL System Architecture Closed Form Analysis Non-Closed
More informationChapter 10. Circuits Switching and Packet Switching 10-1
Chapter 10 Circuits Switching and Packet Switching 10-1 Content Switched communication networks Circuit switching networks Circuit-switching concepts Packet-switching principles X.25 (mentioned but not
More informationA Whirlwind Introduction to the Internet. A Whirlwind Introduction to the Internet Overview
CPSC 852 Intering A Whirlwind Introduction to the Internet Michele Weigle Department of Computer Science Clemson University mweigle@cs.clemson.edu http://www.cs.clemson.edu/~mweigle/courses/cpsc852 1 A
More informationG 364: Mobile and Wireless Networking. CLASS 19, Mon. Mar Stefano Basagni Spring 2004 M-W, 11:40am-1:20pm, 109 Rob
G 364: Mobile and Wireless Networking CLASS 19, Mon. Mar. 22 2004 Stefano Basagni Spring 2004 M-W, 11:40am-1:20pm, 109 Rob Mobility Management Crucial problem in PCS Affect the performance of the system
More informationIntroduction to Communication Theory
Introduction to Communication Theory Lijun Qian Department of Electrical Engineering PVAMU Figure 1 Elements of a communication system. Elements of a communication system Transmitter To convert the message
More informationWireless Networks. Communication Networks
Wireless Networks Communication Networks Types of Communication Networks Traditional Traditional local area network (LAN) Traditional wide area network (WAN) Higher-speed High-speed local area network
More informationCenturyLink has the ability to raise rates on ISDN-PRI Service on a Term Discount Plan. See Section 3.8.B. for applicable terms and conditions.
CenturyLink has the ability to raise rates on ISDN-PRI Service on a Term Discount Plan. See Section 3.8.B. for applicable terms and conditions. LOCAL TERMS OF SERVICE: CENTURYLINK INTEGRATED SERVICES DIGITAL
More informationCompetitive Public Switched Telephone Network (PSTN) Wide- Area Network (WAN) Access Using Signaling System 7 (SS7)
Competitive Public Switched Telephone Network (PSTN) Wide- Area Network (WAN) Access Using Signaling System 7 (SS7) Definition Using conventional Internet access equipment, service providers may access
More informationGSM System Overview. Ph.D. Phone Lin.
GSM System Overview Phone Lin Ph.D. Email: plin@csie.ntu.edu.tw 1 Outlines Introduction GSM Architecture Location Tracking and Call Setup Security GSM Data Services Unstructured Supplementary Service Data
More informationCh. 4 - WAN, Wide Area Networks
1 X.25 - access 2 X.25 - connection 3 X.25 - packet format 4 X.25 - pros and cons 5 Frame Relay 6 Frame Relay - access 7 Frame Relay - frame format 8 Frame Relay - addressing 9 Frame Relay - access rate
More informationFrom Alexander Graham Bell to SIP. Russ Clark August 24, 2009
From Alexander Graham Bell to SIP Russ Clark August 24, 2009 Origins of Telephony Origins of Telephony Watson come here, I want to see you! Origins of Telephony Watson come here, I want to see you! Dedicated
More informationLecture #6 Multiplexing and Switching
SPRING 2015 Integrated Technical Education Cluster At AlAmeeria E-626-A Data Communication and Industrial Networks (DC-IN) Lecture #6 Multiplexing and Switching Instructor: Dr. Ahmad El-Banna 1 Agenda
More informationTechnology Series: Introduction to ISDN - North America
a step ahead 22 Great Oaks Blvd, San Jose CA 95119 USA Tel: 1 408 363 8000 Fax: 1 408 363 8313 Email: info@sunrisetelecom.com www.sunrisetelecom.com Technology Series: Introduction to ISDN - North America
More informationTwelfth Edition. Chapter 8: Wired and Wireless Communication. Copyright 2012 Pearson Education, Inc. Publishing as Prentice Hall 1
Computers Are Your Future Twelfth Edition Chapter 8: Wired and Wireless Communication Copyright 2012 Pearson Education, Inc. Publishing as Prentice Hall 1 Wired and Wireless Communication Copyright 2012
More informationNZQA unit standard version 2 Page 1 of 6. Demonstrate basic knowledge of telecommunications concepts
Page 1 of 6 Title Demonstrate basic knowledge of telecommunications concepts Level 2 Credits 10 Purpose This unit standard covers basic telecommunications principles and is intended for telecommunications
More information