Cs project proposal
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Voip
The document discusses Voice over IP (VoIP) and IP-PBXs. It describes how IP-PBXs integrate voice and data communication over a single IP network, replacing separate phone and computer networks. This consolidation provides cost savings through reduced infrastructure needs and more efficient use of bandwidth. However, VoIP faces challenges in ensuring call quality and reliability. The document also outlines several applications of IP-PBXs, such as unified messaging systems, software-based IP phones, and enhanced call routing using computer calendar and login data.
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The aim of this paper is to present a new System on Chip (SoC) reconfigurable gateway
architecture for Voice over Internet Telephony (VOIP). Our motivation behind this work is
justified by the following arguments: most of VOIP solutions proposed in the market are based
on the use of a general purpose processor and a DSP circuit. In these solutions, the use of the
serial multiply accumulate circuit is very limiting for the signal processing. Also, in embedded
VOIP based DSP applications, the DSP works without MMU (memory management unit). This
is a serious limitation because VOIP solutions are multi-task based. In order to overcome these
problems, we propose a new VOIP gateway architecture built around the OpenRisc-1200-V3
processor. This last one integrates a DSP circuit as well as a MMU. The hardware architecture
is mapped into the VIRTEX-5 FPGA device. We propose a design methodology based on the
design for reuse and design with reuse concepts. We demonstrate that the proposed SoC
architecture is reconfigurable, scalable and the final RTL code can be reused for any FPGA or
ASIC technology. Performances measures, in the VIRTEX-5 FPGA device family, show that the
SOC-gateway architecture occupies 52% of the FPGA in term of slice LUT, 42% of IOBs, 60%
of bloc memory, 8% of integrated DSP, 16% of PLL and the total power is estimated at
4.3Watts.
A NEW SYSTEM ON CHIP RECONFIGURABLE GATEWAY ARCHITECTURE FOR VOICE OVER INTER...
The aim of this paper is to present a new System on Chip (SoC) reconfigurable gateway architecture for Voice over Internet Telephony (VOIP). Our motivation behind this work is
justified by the following arguments: most of VOIP solutions proposed in the market are based on the use of a general purpose processor and a DSP circuit. In these solutions, the use of the serial multiply accumulate circuit is very limiting for the signal processing. Also, in embedded VOIP based DSP applications, the DSP works without MMU (memory management unit). This is a serious limitation because VOIP solutions are multi-task based. In order to overcome these
problems, we propose a new VOIP gateway architecture built around the OpenRisc-1200-V3 processor. This last one integrates a DSP circuit as well as a MMU. The hardware architecture is mapped into the VIRTEX-5 FPGA device. We propose a design methodology based on the design for reuse and design with reuse concepts. We demonstrate that the proposed SoC architecture is reconfigurable, scalable and the final RTL code can be reused for any FPGA or ASIC technology. Performances measures, in the VIRTEX-5 FPGA device family, show that the SOC-gateway architecture occupies 52% of the FPGA in term of slice LUT, 42% of IOBs, 60% of bloc memory, 8% of integrated DSP, 16% of PLL and the total power is estimated at 4.3Watts
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Voice over Internet Protocol (VoIP) technologies are integral to modern telecommunications because of
their advanced features, flexibility, and economic benefits. Internet Service Providers initially promoted
these technologies by providing low cost local and international calling. At present, there is also a great
deal of interest in using IP-based technologies to replace traditional small and large office telephone
systems that use traditional PBX’s (Private Branch eXchange). Unfortunately, the large majority of the
emerging VoIP based office telephone systems have followed the centralized design of traditional public
and private telephone systems in which all the intelligence in the system is at the core, with quite expensive
hardware and software components and appropriate redundancy for adequate levels of reliability. In this
paper, it is argued that a centralized model for an IP-based telecommunications system fails to exploit the
full capabilities of Internet-inspired communications and that, very simple, inexpensive, elegant and
flexible solutions are possible by deliberately avoiding the centralized approach. This paper describes the
design, philosophy and implementation of a prototype for a fully distributed IP-based Telecommunication
System (IPTS) that provides the essential feature set for office and home telecommunications, including IPbased
long-distance and local calling, and with the support for video as well as data and text. The
prototype system was implemented with an Internet-inspired distributed design using open source software,
with appropriate customizations and configurations.
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A NEW SYSTEM ON CHIP RECONFIGURABLE GATEWAY ARCHITECTURE FOR VOICE OVER INTER...
The aim of this paper is to present a new System on Chip (SoC) reconfigurable gateway
architecture for Voice over Internet Telephony (VOIP). Our motivation behind this work is
justified by the following arguments: most of VOIP solutions proposed in the market are based
on the use of a general purpose processor and a DSP circuit. In these solutions, the use of the
serial multiply accumulate circuit is very limiting for the signal processing. Also, in embedded
VOIP based DSP applications, the DSP works without MMU (memory management unit). This
is a serious limitation because VOIP solutions are multi-task based. In order to overcome these
problems, we propose a new VOIP gateway architecture built around the OpenRisc-1200-V3
processor. This last one integrates a DSP circuit as well as a MMU. The hardware architecture
is mapped into the VIRTEX-5 FPGA device. We propose a design methodology based on the
design for reuse and design with reuse concepts. We demonstrate that the proposed SoC
architecture is reconfigurable, scalable and the final RTL code can be reused for any FPGA or
ASIC technology. Performances measures, in the VIRTEX-5 FPGA device family, show that the
SOC-gateway architecture occupies 52% of the FPGA in term of slice LUT, 42% of IOBs, 60%
of bloc memory, 8% of integrated DSP, 16% of PLL and the total power is estimated at
4.3Watts.
A NEW SYSTEM ON CHIP RECONFIGURABLE GATEWAY ARCHITECTURE FOR VOICE OVER INTER...
The aim of this paper is to present a new System on Chip (SoC) reconfigurable gateway architecture for Voice over Internet Telephony (VOIP). Our motivation behind this work is
justified by the following arguments: most of VOIP solutions proposed in the market are based on the use of a general purpose processor and a DSP circuit. In these solutions, the use of the serial multiply accumulate circuit is very limiting for the signal processing. Also, in embedded VOIP based DSP applications, the DSP works without MMU (memory management unit). This is a serious limitation because VOIP solutions are multi-task based. In order to overcome these
problems, we propose a new VOIP gateway architecture built around the OpenRisc-1200-V3 processor. This last one integrates a DSP circuit as well as a MMU. The hardware architecture is mapped into the VIRTEX-5 FPGA device. We propose a design methodology based on the design for reuse and design with reuse concepts. We demonstrate that the proposed SoC architecture is reconfigurable, scalable and the final RTL code can be reused for any FPGA or ASIC technology. Performances measures, in the VIRTEX-5 FPGA device family, show that the SOC-gateway architecture occupies 52% of the FPGA in term of slice LUT, 42% of IOBs, 60% of bloc memory, 8% of integrated DSP, 16% of PLL and the total power is estimated at 4.3Watts
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their advanced features, flexibility, and economic benefits. Internet Service Providers initially promoted
these technologies by providing low cost local and international calling. At present, there is also a great
deal of interest in using IP-based technologies to replace traditional small and large office telephone
systems that use traditional PBX’s (Private Branch eXchange). Unfortunately, the large majority of the
emerging VoIP based office telephone systems have followed the centralized design of traditional public
and private telephone systems in which all the intelligence in the system is at the core, with quite expensive
hardware and software components and appropriate redundancy for adequate levels of reliability. In this
paper, it is argued that a centralized model for an IP-based telecommunications system fails to exploit the
full capabilities of Internet-inspired communications and that, very simple, inexpensive, elegant and
flexible solutions are possible by deliberately avoiding the centralized approach. This paper describes the
design, philosophy and implementation of a prototype for a fully distributed IP-based Telecommunication
System (IPTS) that provides the essential feature set for office and home telecommunications, including IPbased
long-distance and local calling, and with the support for video as well as data and text. The
prototype system was implemented with an Internet-inspired distributed design using open source software,
with appropriate customizations and configurations.
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This document provides an overview of an IoT-based wireless electronic notice board project. The system will allow users to send notices from an Android phone to be displayed on an LCD screen notice board. Key aspects include:
- The main controlling device is a Raspberry Pi processor connected to a WiFi modem and LCD display. Notices sent from an Android app will be received by the WiFi modem and processed/displayed by the Raspberry Pi.
- The objectives are to develop a wireless notice board that can display notices sent from a mobile phone in a timely manner, as well as support sending documents, images, and videos.
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This document summarizes a research paper on VoIP security. It discusses two important VoIP protocols, SIP and H.323, and analyzes their security features. It also defines new functionality for negotiating security mechanisms between SIP entities. Several security issues are identified for VoIP, such as denial of service attacks. Solutions to improve VoIP security include encryption at endpoints, using SRTP, better scheduling, and resolving NAT/IPsec incompatibilities.
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This document is a project report on VoIP technology from Gollis University. It discusses what VoIP is, the history and evolution of VoIP, how VoIP works by breaking voice signals into packets and sending them over IP networks, common VoIP protocols and codecs, benefits of VoIP compared to traditional phone systems, and potential future enhancements to VoIP technology. It was created by a group of 6 students for their 7th semester mini project.
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Cs project proposal
- 1. Computer Science Project Proposal 1. Principal Investigator Brendan Marlborough. Currently doing joint Computer Science and Information Systems Honours at Rhodes University. Address: 6 Leicester Street Grahamstown 6139. Email: g02m1213@campus.ru.ac.za 2. Title of Project SIP / H.323 / AIX telephone customization 3. Mentoring Professor Peter Clayton, Research Director for Computer Science, Rhodes University P.Clayton@ru.ac.za Professor Alfredo Terzoli, Centre of Excellence Co-ordinator, Computer Science, Rhodes University A.Terzoli@ru.ac.za 4. Objective of Research The main aim of this project is to enhance the features of the current IP telephone used in the department. This will involve fixing certain features of the phone which are not suitable for our purposes such as improving the display. Encryption may also be added to the phone in conjunction with a master’s student. Another feature the phone lacks is the ability to connect over a PPPoE network and this may also be rectified. The following needs to be researched in order to accomplish these objectives: What changes will have to be made to the interface (keypad and display)
- 2. in order to make the phone more user friendly, should encryption be added what changes if any will have to be made to the existing network and will the phone be able to support encryption. 5. Background/History of the Study The Computer Science department at Rhodes University currently uses a telephone service known as iLanga. iLanga uses Asterisk, an open source component, which is used to connect different voice networks, including networks based on SIP and H.232 (both VoIP protocols) and also the PSTN (public switched telephone network). The telephone being upgraded is one type of end device used in iLanga. The phone is manufactured and programmed in China and comes with an API which can be used to re-program it. These telephones will soon be offered to a limited number of students in residences at Rhodes University. For this reason the phone should be as user friendly as possible. It would also be preferable that the phone has encryption if it is to be used for private conversations, and if the phone is to be used via a wireless network then it would need to support PPPoE. 6. Approach to the Study Reading will have to be done on how the voice network in the Computer Science department works, how the phone connects and makes calls via the VoIP gateways and also how the protocols the phone uses work. Reading will also have to be done about embedded systems and how to update the flash memory in the phone. Should encryption be added reading will be have to be done on that subject. 7. Information to be Derived/Deliverables The project aims to improve some features of the phone which are lacking. The phone is a very cheap option for our purposes despite some of its bad and lacking features. Ways to improve the phones interface should therefore be found and implemented in order to make the phone more suitable for our use and the use in residences.
- 3. 8. Equipment Requirements A VoIP telephone with all the tools that will be used to compile the new C programs and update the phones flash memory. A connection to the Rhodes voice network in order to test the phone is also required. 9. Initial timeline for implementation 1 Week Learn how the various VoIP protocols work. 3 Weeks Learn more about embedded programming and understand the code provided with the phone. 1 Week Find ways to improve the interface. 3 Weeks Implement changes to the interface. 1 Week Investigate the viability of adding encryption to the phone 2 Weeks Possibly add encryption to the phone 3 Weeks Investigate adding PPPoE and possibly implementing it. This is just an initial time line and not enough detail is known to provide a better time estimate. These steps may not be carried out in the same order as they appear above either and a more iterative approach is likely to be used. 10. References Centrality Communications, PA1688 IP Phone Development guide, Centrality Communications, 2004 Penton, J., Terzoli, A., Asterisk: A Converged TDM and Packet-based Communications System, Computer Science Department, Rhodes University, 2003 Penton, J., Terzoli, A., iLanga: A Next Generation VoIP-based, TDM-enabled PBX, South African Telecommunications Networks and Appliances Conference, September 2004, Spiers