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(1 - 13 of 13)
- Title
- PREPARING FOR SMOOTH TRANSITION TO ISDN (INTEGRATED SERVICES DIGITAL NETWORK).
- Creator
- EHLEY, GLENN A., Florida Atlantic University
- Abstract/Description
-
This thesis deals with the major issues concerning a smooth transition into the Integrated Services Digital Network (ISDN). The goals of technology improvements, cost/performance effectiveness, user acceptance of ISDN services, converting the network to an all digital network, and standardization are essential for the economic acceptance by the ISDN user. The uses of ISDN are not completely known, it is therefore very difficult to accurately plan the ISDN network. Because of this uncertainty,...
Show moreThis thesis deals with the major issues concerning a smooth transition into the Integrated Services Digital Network (ISDN). The goals of technology improvements, cost/performance effectiveness, user acceptance of ISDN services, converting the network to an all digital network, and standardization are essential for the economic acceptance by the ISDN user. The uses of ISDN are not completely known, it is therefore very difficult to accurately plan the ISDN network. Because of this uncertainty, the call holding time is difficult to determine. This thesis shows the effects on the D channel occupancy by varying both the call holding time along with varying the packet data over the signaling channel. It is shown that a low call holding time drastically increases the traffic load over the D channel.
Show less - Date Issued
- 1987
- PURL
- http://purl.flvc.org/fcla/dt/14414
- Subject Headings
- Integrated services digital networks
- Format
- Document (PDF)
- Title
- Performance analysis of Signaling System no. 7 for ISDN applications.
- Creator
- Eskamaei, Mehdi., Florida Atlantic University, Ilyas, Mohammad
- Abstract/Description
-
This thesis deals with the major concepts, evolution, and the implementation of common channel signaling systems in current telecommunications networks. An analytical model for performance evaluation of networks design, using Signaling System #7, is presented. The primary emphasis is to calculate the average delay of messages based upon error probability and data transmission rate. The thesis describes existing common channel signaling systems. CCITT Signaling System #6 and #7 are explained....
Show moreThis thesis deals with the major concepts, evolution, and the implementation of common channel signaling systems in current telecommunications networks. An analytical model for performance evaluation of networks design, using Signaling System #7, is presented. The primary emphasis is to calculate the average delay of messages based upon error probability and data transmission rate. The thesis describes existing common channel signaling systems. CCITT Signaling System #6 and #7 are explained. United States versions of signaling systems, CCIS #6 and CCS #7 are examined in detail. The move toward Integrated Services Digital Networks (ISDNs) is discussed in terms of interfaces, and standards. CCS architectures in support of ISDNs are outlined.
Show less - Date Issued
- 1988
- PURL
- http://purl.flvc.org/fcla/dt/14460
- Subject Headings
- Signal theory (Telecommunication), Integrated services digital networks
- Format
- Document (PDF)
- Title
- PERFORMANCE ANALYSIS OF INTEGRATED SERVICES DIGITAL NETWORK D-CHANNEL BASIC RATE ACCESS.
- Creator
- MUTH, THERESA ANN., Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
This thesis evaluates the performance of the D-channel which is part of the Basic Rate interface in an Integrated Services Digital Network (ISDN). A channel is a specified portion of the information-carrying capacity of the interface. The Basic Rate interface supports three channels; two B-channels and one D-channel. As ISDN user, physically connected on a passive bus, contends and resolves access for the D-channel, or signalling channel. In this thesis the D-channel and the contention...
Show moreThis thesis evaluates the performance of the D-channel which is part of the Basic Rate interface in an Integrated Services Digital Network (ISDN). A channel is a specified portion of the information-carrying capacity of the interface. The Basic Rate interface supports three channels; two B-channels and one D-channel. As ISDN user, physically connected on a passive bus, contends and resolves access for the D-channel, or signalling channel. In this thesis the D-channel and the contention resolution are modeled and simulated as a queueing system. Simulation results using the non-preemptive priority queueing discipline with deterministic and truncated exponential service times are presented. Performance is measured in terms of delay and queue length characteristics.
Show less - Date Issued
- 1987
- PURL
- http://purl.flvc.org/fcla/dt/14406
- Subject Headings
- Integrated services digital networks, Computer interfaces
- Format
- Document (PDF)
- Title
- STUDY OF BANDWIDTH ALLOCATION STRATEGIES FOR NETWORKS INTEGRATING VOICE AND DATA.
- Creator
- IZQUIERDO, MICHAEL ROBERT., Florida Atlantic University, Ilyas, Mohammad
- Abstract/Description
-
The purpose of this thesis is to study three types of bandwidth allocation strategies for a network integrating voice and data, commonly referred to as Integrated Services Digital Network or ISDN, using GPSS V simulati ons. The strategies are Non-Boundary, Movable-Boundary, and Non- and Movable- Boundary with Digital Speech Interpolation. The theoretical behavior of each strategy is discussed. Exact solutions for small systems with one or two slots is shown along with approximations for...
Show moreThe purpose of this thesis is to study three types of bandwidth allocation strategies for a network integrating voice and data, commonly referred to as Integrated Services Digital Network or ISDN, using GPSS V simulati ons. The strategies are Non-Boundary, Movable-Boundary, and Non- and Movable- Boundary with Digital Speech Interpolation. The theoretical behavior of each strategy is discussed. Exact solutions for small systems with one or two slots is shown along with approximations for larger systems. General descriptions of the GPSS models for each strategy is provided. The GPSS model source code for each strategy is presented in the Appendix. Simulation is used to explore the effects of the service time ratio a of voice and data on system performance. Also, the performance of Time Division Multiplex or TDM systems with 24 channels, commonly referred to as Tl, is shown.
Show less - Date Issued
- 1987
- PURL
- http://purl.flvc.org/fcla/dt/14355
- Subject Headings
- Integrated services digital networks, Time management
- Format
- Document (PDF)
- Title
- Characterization and performance evaluation of video conference traffic in ATM networks.
- Creator
- Nayak, Chandrika Narayana., Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
In order to effectively transport digital compressed video over Broadband Integrated Services Digital Networks (B-ISDN) with Asynchronous Transfer Mode (ATM), the characteristics of the video source traffic should be understood. The nature of the video traffic depends primarily on the source, the content of the video and the coding algorithm that removes redundancies for efficient transmission over networks. In this study, video conference data encoded using a subband coding scheme, Digital...
Show moreIn order to effectively transport digital compressed video over Broadband Integrated Services Digital Networks (B-ISDN) with Asynchronous Transfer Mode (ATM), the characteristics of the video source traffic should be understood. The nature of the video traffic depends primarily on the source, the content of the video and the coding algorithm that removes redundancies for efficient transmission over networks. In this study, video conference data encoded using a subband coding scheme, Digital Video Compression System (DVCS), is analyzed to determine its characteristics. Several video traffic sources are multiplexed through an ATM network node with limited capacity and the performance of this environment is evaluated by using a simulation technique. The simulation results are presented for the performance measures for varying traffic and network conditions.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15166
- Subject Headings
- Broadband communications systems, Integrated services digital networks, Asynchronous transfer mode, Digital video, Video compression
- Format
- Document (PDF)
- Title
- YACAD: Yet Another Congestion Avoidance Design for ATM-based networks.
- Creator
- Hsu, Sam, Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
This dissertation proposes YACAD (Yet Another Congestion Avoidance Design for ATM-based Networks), a congestion prevention model that includes admission control, traffic shaping, and link-by-link flow control for ATM-based networks. Network traffic in this model is composed of real-time traffic and data traffic. As real-time traffic is delay-sensitive and connection-oriented, its call acceptance is based upon the effective bandwidth at all nodes. Effective bandwidth is defined as a vector of...
Show moreThis dissertation proposes YACAD (Yet Another Congestion Avoidance Design for ATM-based Networks), a congestion prevention model that includes admission control, traffic shaping, and link-by-link flow control for ATM-based networks. Network traffic in this model is composed of real-time traffic and data traffic. As real-time traffic is delay-sensitive and connection-oriented, its call acceptance is based upon the effective bandwidth at all nodes. Effective bandwidth is defined as a vector of bandwidth and maximum node delay. As data traffic can be either connection-oriented or connectionless, it is subject to link-by-link flow control based on a criterion known as effective buffer which is defined as a scalar of buffer size. Data traffic is not delay-sensitive but is loss-sensitive. Traffic shaping is imposed on real-time traffic to ensure a smooth inflow of real-time cells. YACAD also allocates a large buffer (fat bucket) to data traffic to accommodate sudden long bursts of data cells. Absence of data cell loss is a major feature of YACAD. Two simulation studies on the performance of the model are conducted. Analyses of the simulation results show that the proposed congestion avoidance model can achieve congestion-free networking and bounded network delays for real-time traffic at high levels of channel utilization. The maximum buffer requirements for loss-free cell delivery for data traffic, and the cell loss probabilities for real-time traffic are also obtained. In addition, results of performance comparisons to other similar models have shown that YACAD outperforms several other leaky-bucket based congestion control methods in terms of cell loss probability for real-time traffic. The simulation source program has also been verified using existing queueing theories, and the Paired-t Confidence Interval method with satisfactory results at 99% confidence level.
Show less - Date Issued
- 1993
- PURL
- http://purl.flvc.org/fcla/dt/12336
- Subject Headings
- Integrated services digital networks, Broadband communications systems, Packet switching (Data transmission), Computer networks--Management
- Format
- Document (PDF)
- Title
- A unified end-to-end priority strategy for traffic control in an ATM-based broadband ISDN.
- Creator
- Bemmel, Vincent Egbert., Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
In order to guarantee a committed Quality of Service (QoS) to the users of a Broadband Integrated Services Digital Network (B-ISDN), preventive congestion control becomes critical, and is implemented through Call Acceptance Control (CAC) and Usage Parameter Control (UPC) functions. Currently, Asynchronous Transfer Mode (ATM) cells are equipped with a 1-bit Cell Loss Priority (CLP) field, which can be used for service-oriented and/or UPC marking. This creates a conflict, since these two...
Show moreIn order to guarantee a committed Quality of Service (QoS) to the users of a Broadband Integrated Services Digital Network (B-ISDN), preventive congestion control becomes critical, and is implemented through Call Acceptance Control (CAC) and Usage Parameter Control (UPC) functions. Currently, Asynchronous Transfer Mode (ATM) cells are equipped with a 1-bit Cell Loss Priority (CLP) field, which can be used for service-oriented and/or UPC marking. This creates a conflict, since these two marking approaches may have contradicting objectives, and are designed to operate independently. Moreover, by admitting excessive cells as marked traffic, this group is allowed to grow uncontrollably, thereby jeopardizing the QoS committed to other marked cells. This dissertation presents a solution to these problems by proposing a new 4-class priority strategy that unifies the two marking approaches, and is based on a 2-bit CLP field. The impacts of the new priority scheme are triple-fold: (I) For the UPC, a new scheme, the Forgiving Leaky Bucket (FLB), not only carries priorities through subnetwork boundaries, but also has the power of unmarking, i.e. forgiving, previously marked cells, depending on the bandwidth availability in the entering subnetwork. Forgiving will correct access-point bias, a phenomenon observed in internetworked ATM subnetworks of different congestion conditions. (II) At ATM switching nodes, a new space priority scheme is based on a hybrid of the Nested Threshold, and Push-Out cell discarding methods. This scheme is designed for the 4-class priority strategy, and improves the quality of the low priority traffic. (III) In interfacing High Speed Local Area Networks and Metropolitan Area Networks, idle bandwidth due to STM multiplexing is utilized to carry marked excessive cells of connection-oriented variable bit rate traffic, in addition to the service-oriented marking performed at transmitting stations. The resulting stream is then carried through internetworking points, subject to FLB adjustments. As a result, the STM and ATM subnetworks will support a uniform end-to-end priority strategy, essential for a B-ISDN. The proposed impacts are analyzed and compared with conventional implementations, and future directions are indicated.
Show less - Date Issued
- 1993
- PURL
- http://purl.flvc.org/fcla/dt/12334
- Subject Headings
- Integrated services digital networks, Broadband communication systems, Computer networks--Management, Packet switching (Data transmission)
- Format
- Document (PDF)
- Title
- Broadband-ISDN signaling: Protocol description and enhancements for future services.
- Creator
- Vasi, Idris Taher., Florida Atlantic University, Lobo, Andrea, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
Broadband-ISDN Network Architecture and Signaling concepts are described with particular emphasis on Asynchronous Transfer Mode (ATM) technology. A consolidated view of various aspects of B-ISDN/ATM Access and Network Signaling functions, architecture and protocols is presented. Additionally, a suggested evolutionary growth path for the B-ISDN signaling protocols is summarized. This is followed by a high-level comparison of two protocols under consideration for network signaling. The result...
Show moreBroadband-ISDN Network Architecture and Signaling concepts are described with particular emphasis on Asynchronous Transfer Mode (ATM) technology. A consolidated view of various aspects of B-ISDN/ATM Access and Network Signaling functions, architecture and protocols is presented. Additionally, a suggested evolutionary growth path for the B-ISDN signaling protocols is summarized. This is followed by a high-level comparison of two protocols under consideration for network signaling. The result of this evaluation indicates that the requirements of network signaling are best met by a protocol stack based on SS7 concepts. Finally, a set of future B-ISDN and Multimedia services is presented in context of the requirements they would impose on the signaling protocols. Enhancements to the access signaling protocol are proposed for the support of multiconnection and/or multiparty calls. These extensions/enhancements consist of a set of simplified messages, information elements and procedures based on message flows. Evolution and backward compatibility to existing protocols are taken into account while developing the extensions.
Show less - Date Issued
- 1994
- PURL
- http://purl.flvc.org/fcla/dt/15016
- Subject Headings
- Asynchronous transfer mode, Computer network architectures, Broadband communication systems, Data transmission systems, Computer network protocols, Integrated services digital networks
- Format
- Document (PDF)
- Title
- Designing non-proprietary and practical ISDN terminal equipment for basic access.
- Creator
- Mitchell, Todd., Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
This thesis illustrates the design of non-proprietary and practical ISDN terminal equipment for basic access. Terminal compatibility with the AT&T 5ESS, Northern Telecom DMS100, and Siemens EWSD Class 5 switches is considered. General compliance is dictated by all applicable CCITT recommendations and BELLCORE technical references. A consolidation of the useful information in the CCITT and BELLCORE technical documents is provided from a design engineer's perspective. A practical, cost...
Show moreThis thesis illustrates the design of non-proprietary and practical ISDN terminal equipment for basic access. Terminal compatibility with the AT&T 5ESS, Northern Telecom DMS100, and Siemens EWSD Class 5 switches is considered. General compliance is dictated by all applicable CCITT recommendations and BELLCORE technical references. A consolidation of the useful information in the CCITT and BELLCORE technical documents is provided from a design engineer's perspective. A practical, cost effective implementation is outlined and considerations for flexibility due to the changing requirements are explored. The objective is to specify simplified guidelines which can be followed to create generic ISDN terminal equipment which is non-proprietary and practical for ISDN subscribers today.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14662
- Subject Headings
- Integrated services digital networks, Data transmission systems--Equipment and supplies
- Format
- Document (PDF)
- Title
- Performance analysis of a very fast packet switching system for broadband ISDN.
- Creator
- Rao, Radha Nallur Seshagiri., Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
Rapid advances in technology have resulted in the evolution of Integrated Services Digital Networks (ISDNs) to Broadband ISDNs (BISDNs). This thesis discusses and evaluates the performance of a high speed and high capacity packet switching system architecture for BISDNs. This system supports various high speed communication services like data, voice, and video services. The main performance criterion is the mean switching delay, which is defined as the packet transfer delay through the bus...
Show moreRapid advances in technology have resulted in the evolution of Integrated Services Digital Networks (ISDNs) to Broadband ISDNs (BISDNs). This thesis discusses and evaluates the performance of a high speed and high capacity packet switching system architecture for BISDNs. This system supports various high speed communication services like data, voice, and video services. The main performance criterion is the mean switching delay, which is defined as the packet transfer delay through the bus and through the loop connecting various switch modules in the system. Other performance criteria are power and system throughput. The performance parameters are evaluated separately for both data and control (signaling) packets. The effects of the number of switch modules in the system, the data packet length, and the ratio of arrival rate of data to control packets are examined. It is observed that the switching delay and throughput increase with an increase in the traffic intensity for any number of switching modules and the ratio of arrival rate of data to control packets. The delay for data packets is found to be higher for lower values of this ratio and vice versa. The power is found to be maximum for about 70% load. The switching delay in this simulation model is found to be less than one millisecond for data packets.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14603
- Subject Headings
- Packet switching (Data transmission), Integrated services digital networks, Broadband communication systems
- Format
- Document (PDF)
- Title
- Estimation of information: Theoretics-based delay bounds of MPEG traffic over ATM networks.
- Creator
- Jagannathan, Shuba., Florida Atlantic University, Hsu, Sam, Neelakanta, Perambur S.
- Abstract/Description
-
This thesis addresses a method to deduce the statistical bounds associated with the cell-transfer delay variations (CDVs) encountered by the cells of MPEG traffic, transmitted in the Asynchronous Transfer Mode (ATM) networks. This study focuses on: (1) Estimating CDV arising from multiplexing/switching for both constant bit rate (CBR) and variable bit rate (VBR) traffics via priority allocation based simulations. (2) Developing an information-theoretics based technique to get an insight of...
Show moreThis thesis addresses a method to deduce the statistical bounds associated with the cell-transfer delay variations (CDVs) encountered by the cells of MPEG traffic, transmitted in the Asynchronous Transfer Mode (ATM) networks. This study focuses on: (1) Estimating CDV arising from multiplexing/switching for both constant bit rate (CBR) and variable bit rate (VBR) traffics via priority allocation based simulations. (2) Developing an information-theoretics based technique to get an insight of the combined BER-induced and multiplexing/switching-induced CDVs in ATM networks. Algorithms pertinent to CDV statistics are derived and the lower and upper bounds of the statistics are obtained via simulations in respect of CBR and VBR traffics. Ascertaining these bounds is useful in the cell admission control (CAC) strategies adopted in ATM transmissions. Inferential remarks indicating the effects of traffic parameters (such as bandwidth, burstiness etc.) on the values of the statistical bounds are presented, and scope for further work are presented.
Show less - Date Issued
- 1998
- PURL
- http://purl.flvc.org/fcla/dt/15577
- Subject Headings
- Asynchronous transfer mode, Broadband communication systems, Integrated services digital networks, Information theory
- Format
- Document (PDF)
- Title
- Cross-domain authentication for multi-protocol phones.
- Creator
- Thakker, Chetan., Florida Atlantic University, Pandya, Abhijit S., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
The last decade has seen a surge in demand for cellular and WLAN networks. With the introduction of Voice Over IP, cellular companies are looking at WLAN-Cellular integrated networks that shall provide users with economical voice and data services. These networks shall be complimentary to the existing cellular networks. A lot of money is spent in registering and authenticating new users, since they are separately authenticated and registered on the WLAN and Cellular domains. This leads to...
Show moreThe last decade has seen a surge in demand for cellular and WLAN networks. With the introduction of Voice Over IP, cellular companies are looking at WLAN-Cellular integrated networks that shall provide users with economical voice and data services. These networks shall be complimentary to the existing cellular networks. A lot of money is spent in registering and authenticating new users, since they are separately authenticated and registered on the WLAN and Cellular domains. This leads to extra costs for the company. Thus for the integrated networks to have an impact on the market some issues such as simpler authentication and registration must be resolved. Therefore we propose a new inter-working model that shall addresses the authentication and registration problem for an integrated network for voice and data. The Single authentication system of the new inter-working model, shall authenticate the user in an integrated network using the SIM credentials, this authentication shall be valid for both voice and data. Also registration costs will be saved by preventing separate registration of users in the WLAN and Cellular domain.
Show less - Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/13260
- Subject Headings
- Integrated services digital networks, Digital telephone systems, Wireless communication systems--Technological innovations, Mobile communication systems--Technological innovations
- Format
- Document (PDF)
- Title
- A feedback-based multimedia synchronization technique for distributed systems.
- Creator
- Ehley, Lynnae Anne., Florida Atlantic University, Ilyas, Mohammad, Furht, Borko, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
Multimedia applications incorporate the use of more than one type of media, i.e., voice, video, data, text and image. With the advances in high-speed communication, the ability to transmit multimedia is becoming widely available. One of the means of transport for multimedia in distributed networks is Broadband Integrated Services Digital Network (B-ISDN). B-ISDN supports the transport of large volumes of data with a low error rate. It also handles the burstiness of multimedia traffic by...
Show moreMultimedia applications incorporate the use of more than one type of media, i.e., voice, video, data, text and image. With the advances in high-speed communication, the ability to transmit multimedia is becoming widely available. One of the means of transport for multimedia in distributed networks is Broadband Integrated Services Digital Network (B-ISDN). B-ISDN supports the transport of large volumes of data with a low error rate. It also handles the burstiness of multimedia traffic by providing dynamic bandwidth allocation. When multimedia is requested for transport in a distributed network, different Quality of Service (QOS) may be required for each type of media. For example, video can withstand more errors than voice. In order to provide, the most efficient form of transfer, different QOS media are sent using different channels. By using different channels for transport, jitter can impose skews on the temporal relations between the media. Jitter is caused by errors and buffering delays. Since B-ISDN uses Asynchronous Transfer Mode (ATM) as its transfer mode, the jitter that is incurred can be assumed to be bounded if traffic management principles such as admission control and resource reservation are employed. Another network that can assume bounded buffering is the 16 Mbps token-ring LAN when the LAN Server (LS) Ultimedia(TM) software is applied over the OS/2 LAN Server(TM) (using OS/2(TM)). LS Ultimedia(TM) reserves critical resources such as disk, server processor, and network resources for multimedia use. In addition, it also enforces admission control(1). Since jitter is bounded on the networks chosen, buffers can be used to realign the temporal relations in the media. This dissertation presents a solution to this problem by proposing a Feedback-based Multimedia Synchronization Technique (FMST) to correct and compensate for the jitter that is incurred when media are received over high speed communication channels and played back in real time. FMST has been implemented at the session layer for the playback of the streams. A personal computer was used to perform their synchronized playback from a 16 Mbps token-ring and from a simulated B-ISDN network.
Show less - Date Issued
- 1994
- PURL
- http://purl.flvc.org/fcla/dt/12382
- Subject Headings
- Multimedia systems, Broadband communication systems, Data transmission systems, Integrated services digital networks, Electronic data processing--Distributed processing
- Format
- Document (PDF)
