18-07-2012, 10:04 AM
LASMOBILE PHONE SYSTEM WITH REMOTE MONITORING SECURITY FOR HOME ENVIRONMENT
LASMOBILE PHONE SYSTEM.doc (Size: 5.48 MB / Downloads: 156)
INTRODUCTION
OBJECTIVE
Nowadays, the communications becomes very simple, fast, interactive and more compact, that makes the global as a small village. So it is very easy of anyone to subscribe in the local or global telecommunication networks with individual mobile phone device.
Mobile devices, such as mobile phones, are becoming multipurpose devices. These devices are capable of storing data as well as running custom application. As more people adopt these devices and begin to use them for personal or business tasks, the need for controlling access to the data stored within the devices will become vital [7].
With today’s and tomorrow’s wireless technologies, such as IEEE 802.11, Blue tooth and G3, mobile devices will frequently be in close and interactive communication. Many environments including offices, meeting rooms, automobiles and class rooms already contains many computers and computerized applications, and the smart homes of the nearest future will have ubiquitous embedded computation [8].
PC remote control with small mobile device is a challenging topic of mobile/ubiquitous computing. Enabling users to use data and functions stored in/served by their home/office PCs from anywhere with small mobile devices is beneficial because users can access the data/functions at any time they want without carrying heavy notebook PCs. Furthermore, users can control applications they want to keep running even while they are out. Several systems and methods have been proposed and developed for controlling remote PCs with mobile phone;
The system that employing for translating PC GUIs into mobile device UIs (screen sizes, input device, etc.), such system requires converting image data to text data will be very expensive. The system that uses the email enabled mobile devices [10]; require Java enabled devices, because the systems use client Java applets. Consequently, older model mobile devices that are email enabled but not Java enabled, cannot be used for this system.
This paper represents a simple, practical and very low cast method which applies the VOICE technique that already available in all types of mobile phone devices and provided with all modern mobile telecommunication network.
CHARACTERISTICS OF EMBEDDED SYSTEM
Two major areas of differences are cost and power consumption. Since many embedded systems are produced in the tens of thousands to millions of units range, reducing cost is a major concern. Embedded systems often use a (relatively) slow processor and small memory size to minimize costs. The slowness is not just clock speed. The whole architecture of the computer is often intentionally simplified to lower costs.
For example, embedded systems often use peripherals controlled by synchronous serial interfaces, which are ten to hundreds of times slower than comparable peripherals used in PCs. Programs on an embedded system40
Often must run with real-time constraints with limited hardware resources: often there is no disk drive, operating system, keyboard or screen. A flash drive may replace rotating media, and a small keypad and LCD screen may be used instead of a PC's keyboard and screen. Firmware is the name for software that is embedded in hardware devices, e.g. in one or more ROM/Flash memory IC chips.
CLASSIFICATION
We can classify embedded systems into three types as follows.
Small scale embedded systems:
These systems are designed with a single 8- or 16-bit microcontroller; they have little hardware and software complexities and involve board-level design. They may even battery operated. When developing embedded software for these, an editor, assembler and cross assembler, specific to the microcontroller or processor used, are main programming tools. Usually, ‘ C ‘ is used for developing these systems. The software has to be fit within the memory available and keep in view the need to limit power dissipation when system is running continuously.
SUMMARY
Microcontroller are frequently either a component of an embedded systems or the whole system. For moderately complex tasks such as running a security system with a keypad and display, multiple inputs and outputs, data logging and some user configuration options, the microcontroller would most likely be complemented with additional memory, input/output devices, sensors, etc. From the foregoing, you should understand that an embedded system is a component of a larger system.
SURVEY WORK
In recent times, home automation efforts are being exercised intensively as to setup standards for building efficient smart home[1-4] suited to custom and regional requirements. Remote control of appliances is an important aspect to be considered for implementing home automation and home security systems. When the resident is away from home, for security purposes, it may be required for him to switch ON certain lamps as to give a feeling to others that the resident is inside home. Also, when the resident is away for a long time, before reentering his home he would like to switch ON his AC and perhaps his refrigerator. Being away from home such control operations are to be executed with remote control facilities employing commonly available public communication tools. Furthermore, in home security aspects, any hazardous fire accident that might occur in home while the resident being away need be alerted for taking rescuing measures. An automated smart home[5] possesses facilities such as i. Local control of appliances situated in different living rooms of the flat by the resident inside the home ii. Remote control of appliances given by telephone iii. Admitting the visitors to enter into home after video and audio monitoring iv. Home assistant software that brings the daily activities to be performed, to the monitor screen as to alert the resident for facing the events of the day. v. Energy saving by using a. active sun tracking solar panel and b. optimal direction drifting windmill and vi. Intruder detection and remote intimation by telephone. The multistoried smart home building consisting of several flats needs to have full security and happy living conditions facilitating these features.
SELECTED REMOTE CONTROL TECHNIQUES
The control techniques which are most viable and for easy implementation to home automation system are presented here. In designing the equipment accepting the commands
from the remote control devices a standard of 16 appliances are considered here and the coding scheme is shown in table 2.1 . The appliances are given item code in order to select the appliance for control and action code might be ‘ON’ of ‘OFF’ as to select the action needed. The final control element for switching ON or OFF each appliance is a relay stacked in a relay board shown as a simple scheme in fig 2.1 . The relay board has a relay register which is updated by the incoming command retaining the switched status of other appliances. Obviously the word-length of the relay register is 16 bits for controlling 16 appliances.