• 11 years ago





  • 11 years ago

    Background: During the last few years, the cellular system becomes one of the popular wireless communication mediums. But in the hot spot region, the use of WLAN is increased due to its high data rate and low installation cost. So there is a requirement for suitable integration technique of 3G/GPRS and WLAN to increase the area of coverage and high data rate. The CancerCare Center (CCC), a government-run network of cancer clinics in the central Canada, there was some pain to be sure. But it was short-term pain for long-term gain, says Director of Information Services. CCC's adventures with wireless LAN technology began over four years ago at a time when the organization was switching to computer-based charting - capturing and storing patient information in a computer database instead of the traditional clipboard-and-paper system. It also moved to equipping staff with laptops, partly because real estate for setting up desktop stations was at a premium in its then cramped facilities. But using laptops also let nurses go where patients were in the clinic to gather information from them, saving time and making life easier for sometimes very ill patients. Setting up a wireless network was simply a next logical step. It meant that nurses could update central patient records in real time over the WLAN as they gathered the data. CCC runs four cancer clinics, as well as 17 remote outpatient clinics across the province. It installed a first-generation 1-Mbps wireless LAN from Netwave Technologies Inc. in the main facility and eventually the remote clinics as well. "We like using wireless in the [remote] clinics too," explains Director of Information Services. "The nurses can go from exam room to exam room and they don't have to worry about unplugging, plugging in again, rebooting. It was better for the patients and faster and more accurate for us." The 1-Mbps network worked "reasonably well" for awhile, but as more staff began using the system, it started to slow down. "Nurses would be sitting beside a patient for five minutes waiting for screens to display,". Part of the problem was the charting application CCC was running. Because of the way it configured server and client parts of the program, network traffic was unnecessarily heavy. Besides the speed problems, it became difficult to get additional hardware for new network nodes. Netwave had been acquired by Bay Networks almost immediately after CCC installed the first networks. So 24 months ago, CCC decided to upgrade to a standards-based 11-Mbps network. director of information services was able to cost justify the 11-Mbps network on time savings alone. "We figured the nurses would be saving 5 to 10 minutes per patient [over the old 1-Mbps system]," he explains. "Each one sees a dozen to 30 patients a day. So they saved an hour to an hour and a half every day. Plus, from our perspective [the new network] was easier to maintain." CCC considered four vendors, including 3Com, the eventual winner, Lucent (now Avaya) and Cisco. The selection methods were interesting. Information Service group tested all contenders on ease of set up since it planned to manage the implementation itself. They ordered starter kits for each and tried to set them up out of the box on newly re-imaged laptops. The Lucent system, a front-runner, wouldn't work out of the box. It took two days for CCC to get the information from Lucent's technical support people that it needed to resolve the problem. The 3Com system was easiest to set up. CCC also did methodical range and throughput testing. 3Com came out on top again, maintaining an 8-Mbps link up to 127 feet from an access point. The other systems barely made it over 100 feet. 3Com technology met the crucial prerequisite of allowing CCC to link access points together to provide roaming capability. Not that it was the only one offering this capability, but it was an important requirement because it means nurses and doctors don't have to reconnect as they move from one network cell to another. CCC learned from the earlier implementation. It did a more careful and methodical analysis before deciding on placement of network access points. As a result it avoided coverage problems encountered the first time. There were still glitches. They forgot power outlets for the access point servers and had to run power to each node after the fact. They could only work at night because of the risk of dust contaminating medical equipment, so outsourced installation costs - including for electrics - were doubled. The roaming capability didn't work at first, though 3Com was able to solve that problem quickly. It required only a small software adjustment. CCC initially installed 12 nodes in its central facility in the capital, which is in the midst of a major, long-term re-build. With only 30 laptop users, contention and speed are not a problem at all for now. It has also installed 11-Mbps wireless networks in five of its other facilities, and hopes to have all of the rest upgraded within a year to two years. Costs have come down since CCC started its implementation. At the time, with installation, it came to about $1,250 for one node and five wireless network cards. As the renovation of CCC's main facility is completed and old and new sections set up for wireless, the network will expand. The user load will probably also increase. Director of Information Services hopes to develop a new system that will allow doctors, who currently don't carry laptops, to get key bits of patient information on wirelessly connected devices - probably touch-screen tablet computers from NEC - while they're doing their rounds. If things get uts way, they'll also be able to write up prescriptions online too. "I want to be able to do it [write prescriptions] so much faster with the [tablets] that when a patient walks out of the exam room, the script is already on the printer [in the office]," he says. Director of Information Services and CCC continue to push the envelope on WLAN technology. His own department is currently running voice over IP on the wired portion of the network for Help desk applications. It's now looking at extending IP voice to the wireless net. One possibility is setting up doctors and nurses to receive emergency calls on headset-equipped laptops and tablet PCs. What's next? Video over wireless, of course. The provincial government recently launched an ambitious tele-health program featuring satellite links for video conferencing. CCC doctors in main facility are now piloting video conferencing for doing follow-up visits with patients in outlying centers. But they currently have to take time out of their busy rounds and go next door to a special video conferencing room. Director of Information Services has a plan to solve that little inconvenience. If video conferencing pans out as a useful tool, CCC will create a wirelessly connected video conferencing terminal on a wheeled cart. If a doctor needs to do a conference with a remote patient, he/she can wheel it into an unused exam room, connect wirelessly using standards-based H.323 IP video and do the examination right in the main clinic. You have been assigned the task of conduction a research about the wireless technology that will be used in this project. You are expected to deliver a report that covers at least 2 of the following technologies: 1- WLAN i- WLAN modes(ad-hoc and infrastructure) and topologies(BSS, IBSS, peer-to-peer WLAN) ii- Hot spots (access points) iii- WLAN devices a- Wireless network adapter (internal built- in devices such as Intel’s Centrino technology product, USB, PCI, wireless standard 802.1x). b- Access points( a distribution point, hub, and bridge) Access point considerations such as Coverage, placement, network mode. c- Switches d- Routers and gateways e- Antennas type 2- An overview of the WLAN standards 802.11x 3- Bluetooth (standards Class 1, class2) i- Bluetooth network piconet ii- Bluetooth access points 4- 4G Cellular wireless, 3G, 2.5G. 5- The standard 802.15 Wireless personal area network(WPAN) This will be your first task and you should try to give your best to prove your quality.

    Question 1 (35 marks) Write a report for CCC that: • explains the ‘new’ technologies they might use to develop their wireless networks such as WLAN modes(ad-hoc and infrastructure) and topologies, WLAN devices, WLAN standards 802.11x, Bluetooth (standards Class 1, class2) including the new generation of mobile phones and combined PDA devices, 2.5G, 3G & 4G cellular wireless, GPRS, Intranet etc, and outlines any benefits and drawbacks to using the technology. • draws your material together to describe how it might be integrated in the day-to-day work of the clinic. They may choose to do this in different ways but note the way it has been described in the ‘Background’ brief. Your report should be 1000 words long. State the total number of words you have used at the end of your answer. If you use any quotations, supply a list of the references under the heading ‘References’ at the end. Under the heading ‘Bibliography’ give a list of all the sources other than course materials that you have drawn on in your answer but not quoted directly. You will be penalized if you do not do these three things. You will also be penalized if you do not keep closely within the given word count.

    Question 2 (50 marks) Background This part requires you to submit a copy of your RAD file associated with your answer to Question 2. This Question involves a design task and a report using the CSLU Toolkit as described in detail below. In designated parts of the question, marks will also be awarded for good communication skills; that is, for the structure, style, grammar, punctuation and spelling. In this module, your focus was on how humans interact with and control various forms of information technology and communication systems, and in particular, the role that speech might play in facilitating such interaction. The module has encouraged you to learn through experimentation and reflection using the CSLU Toolkit. This question provides you with an opportunity to demonstrate your understanding of each of the following: • use of speech dialogues within an HTI context; • the use of flowcharts to document a sequential process; • the conversion of a paper design to a practical application; • the review process undertaken during the course of design activities

    Scenario: The development of machines that are able to sustain a conversation with a human being has long been a challenging goal. The need for a dialogue component in a system for human-machine interaction arises for several reasons. Often the user does not express his requirement with a single sentence, because that would be impractical; assistance is then expected from the system, so that the interaction may naturally flow in the course of several dialogue turns. Moreover, a dialogue manager should take care of identifying, and recovering from, speech recognition and understanding errors. An automated telephone banking information system that speaks to the customer with a combination of fixed voice menus and real time data from databases. The customer responds by pressing digits on the telephone or speaking words or short phrases. IVR systems allow customers to get information, service and help 24 hours a day. IVRs are used as a front end to call centers in order to offload as many calls as possible, rather than forward them to more costly live agents. CCS provides a wide range of financial products and services that cover a number of industries in the Arab World. Voice response solutions can improve the speed, accuracy and reliability of service to customers. giving customers easy access to banking, real estate and commercial services over the phone. The solution enabled CCS to increase their customer satisfaction rates, improve the service's quality and enhance overall operational efficiency. CCS Technology group, has just announced the launch of their new project. CCS's call center had to deal with increasingly high volumes of incoming calls, a large number of abandoned calls and many frustrated customers. CCS needed to quickly improve its customer service, reduce the duration of calls and queries, and automate as many parts of the support process as possible. The solution offer voice recognition call center by connect the customer to his/her required service such as “A/C Information”, “Transaction Services” and “Live Agent” to a central embedded computer system in order to be commanded via speech. This system is called “Welcome Banking” (WB). The system will provide the customer to execute the required service through the embedded system. WB uses Speech Recognition Technology to allow customers to access their banking services and information by speaking their requests, which ensures security, saves time, and increases customer satisfaction. CCS customers could now easily and quickly access their bank accounts over the phone, pay their bills, transfer money, order new services and much more without having to go through the labyrinth and frustration of traditional touch-tone menu systems or even speak to a live agent. The system can control each device as follows: • “A/C Information” can respond to two commands: “Balance information” and “Transaction History”. In each of these options SMS message will be sent to customer mobile phone. • “Transaction Services” can respond to four commands: “Fund Transfer”, “Stop Payment”, “Credit Card and Loan Payment” and “Utility Bill Payment”. For “Fund Transfer” A/C details will be required. For “Stop Payment” cheque details will be required. For “Credit Card and Loan Payment” and “Utility Bill Payment” type of payment and amount will be required. • “Live Agent” will transfer to live agent. Imagine that you are part of this CCS initiative, and you have been given the task of designing and developing a simulation of a suitable voice recognition system using the CSLU Toolkit. Your task in this assignment is to construct a speech dialogue application that will provide the user interface to the main application programs in the CCS. At present the project roadmap is very general, we will assume that the system receive commands from the microphone, sends commands to a specific system while producing synthesized texts and displaying a corresponding message. This particular CCS has a straightforward operating mode with a voice recognition interface and will provide the following functions: • Wait until you have received a command from any microphone. • Identify the origin of the message (is it for “A/C Information”, “Transaction Services” or “Live Agent”). • If you need further information such as “mobile number”, “A/C number” or “Amount”, ask the customer to provide you with that information. • Issue commands to the corresponding system and inform the customer of what you have done via synthesized voice and display information. • Be able to manage any predictable errors made by the user. You have been allocated the following tasks: • Preliminary design of the overall system. • Development of a simulated interface, using the RAD application of the CSLU • An evaluation of the potential of this approach.

    Tasks a) Draw an annotated flow chart representing the process for programming and designing the CCS. Your flowchart must indicate the various elements of the user interface speech, display and show how user errors will be handled. [15 marks] b) Create a working RAD simulation for the CCS. Your ‘RAD’ file (which is the file format produced by the CSLU toolkit) must be submitted with this assignment in order for your tutor to run your CCS simulation. [25 marks] c) Prepare a written evaluation for CCS to go with the simulation that describes: • your design, including decisions and assumptions you have made in reaching your design, • your experience of building and testing the RAD simulation, • Your assessment of the viability of such a speech interface and any issues the team will need to consider if the prototype is put into development. Your account should be between 700 – 850 words long. At the end of your answer state the total number of words you have written for part (c). Your word count should include any headings, subheadings and tables you have used but may exclude figure captions. You will be penalized if you do not supply a word count and if you do not keep within the given limits. [15 marks]

    Question 3 (15 marks) Question 1 indicated that you should use the internet to update your knowledge about some or all of the technologies in order to write the report. You will no doubt have done this.

    Write a brief account of your search strategy that • Indicates your successes and problems in the use of search engine(s) to find relevant information, and how you overcame the problems.(provide examples) • Indicates how you decided which sites were useful and reliable.(explain & give examples) • Discuss your experience with some popular search engines such as AltaVista, Google, and Yahoo in terms of speed of response, quality of search results returned etc. Your account should enable your tutor to assess your web-searching skills. It should be some 200–300 words long, but there is no penalty associated with writing more (or less) than this

  • 11 years ago

    IF someone now something about this project send it to me : [email protected]

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