Wireless control process technical exploitation facility (original) (raw)

Wireless Transmission and Control

Modern communication systems are based on information transformation from data source to destination, using various transformation links like cables, optical fibers and Infra Red light this task is achieved. To overcome the disadvantages faced in this type of systems ; In the 2 nd step new concept of Wireless Communication using Radio Frequency links was introduced as modem tool.

WIRELESS EQUIPMENT CONTROL

Keywords -ZigBee, AT89C51 Microcontroller, RX-434 radio receiver, TRX-434 radio transmitter, ULN 2003 relay driver, CD4519 multiplexer. networks and operates in 2.4GHz (ISM) radio bands.

A Review of Wireless Technology Usage for Mobile Robot Controller

This paper presents a comparative study of different wireless technology usage for mobile robot controller such as Bluetooth, WiFi or Wireless LAN and 3G. In literature review, particularly discuss the flow of the application and transferring data or information to the mobile robot. Comparison of the frequency, data rate and range for each wireless technology used in this application are discussed. The advantage and disadvantage of each wireless technology are analyzed. At the end, selection of wireless technologies depends on the type of application to be developed considering the following; range, frequency and data rate.

Utilization of mobile technology for mobile robot controller

2011 IEEE Conference on Open Systems, 2011

This paper presents a comparative study of different wireless technology usage for mobile robot controller such as Bluetooth, WiFi or Wireless LAN and 3G. In literature review, particularly discuss the flow of the application and transferring data or information to the mobile robot. Comparison of the frequency, data rate and range for each wireless technology used in this application are discussed. The advantage and disadvantage of each wireless technology are analyzed. At the end, selection of wireless technologies depends on the type of application to be developed considering the following; range, frequency and data rate.

Design and Implementation of RF Deployed SMS Based Equipment Controller

IJCA, 2012

Short messaging Service (SMS) is popularly used to provide information access to people on the move. This has resulted in advances in mobile communication bring great effects on people's life styles. This paper describes the implementation of a remote control scheme, remote control system via SMS, which controls home and factory devices in short distance and long distance, respectively. This paper proposes a SMS-based protocol, which is designed with the mechanisms of reliable transmission and information encryption, thus it is capable of the implementation of secure and reliable control. This paper mainly focuses on the controlling of home and factory appliances remotely. The system is SMS based and uses wireless technology to revolutionize the standards of living. As the system is wireless therefore more adaptable and costeffective. The whole system is controlled by a PIC microcontroller. We can control a good number of systems or devices by this method.

HIGH POWER TRANSMITTER MONITORING & CONTROL USING GSM

Wireless Communication is being one of the modern trends of communication which is mostly nowadays implemented everywhere. Likewise, Doordarshan HPT Vadodara is having a manual Control and Monitoring of transmitter parameters like Forward & Reflected power, Temperature IN and OUT, Air Blower, Individual Power Amplifiers Data. So looking to this we have defined this as one of the Industrial defined problems. Based on this, the analysis of manual control is carried out theoretically & practically. Depending on this analysis the implementation of automatic control is to be implemented using wireless communication through GSM at HPT, Vadodara after successful design of control circuit.

Principles of Mobile Communication

Wireless systems and services have undergone a remarkable development, since the first cellular and cordless telephone systems were introduced in the early 1980s. First generation cellular and cordless telephone systems were based on analog FM technology and designed to carry narrow-band circuit switched voice services. Second generation cellular and cordless telephone systems were introduced in the early 1990s that use digital modulation, and offer improved spectral efficiency, and voice quality. However, these second generation systems are still used for narrow-band voice and data services. Third generation wireless systems, currently under development that offer substantially higher bit rates ranging from 9.6 kb/s for satellite users, 144 kb/s for vehicular users, 384 kb/s for pedestrian users to 2.048 Mb/s for indoor office environments. These systems are intended to provide voice, data, the more bandwidth intensive multimedia services, while satisfying more stringent availability and quality of service (QoS) requirements in all types environments. Fourth generation systems are also on the horizon that will provide broadband wireless access with asymmetric bit rates that approach 1 Gb/s. Radio access systems are often distinguished by their coverage areas and bit rates, as shown in Fig. 1.1. Mobile satellite systems provide global coverage to mobile users, but with very low bit rates. Land mobile radio systems use terrestrial cellular and microcellular networks to provide wide area coverage to vehicular and pedestrian users. Fixed wireless access systems provide radio connectivity over a campus or neighborhood area to stationary users. Finally, wireless local area networks provide stationary in-building users with very high speed services. system (now "Global System for Mobile Communications") was developed to operate in a new frequency allocation, and made improved quality, Pan-European roaming, and the support of data services its primary objectives. GSM was deployed in late 1992 as the world's first digital cellular system. In its current version, GSM can support full-rate (8 slots/carrier) and half-rate (16 slots/carrier) operation, and provide various synchronous and asynchronous data services at 2.4, 4.8, and 9.6 kb/s that interface to voiceband modems (e.g., V.22bis or V.32) and ISDN. GSM uses TDMA with 200 kHz carrier spacings, eight channels per carrier with a time slot (or burst) duration of 0.577 ms, and Gaussian minimum shift keying (GMSK) with a raw bit rate of 270.8 kb/s. The time slot format of the GSM traffic channels is shown in Fig. 1.2. 6 Just after the CTIA adopted IS-54 in 1990, another second generation digital cellular system was proposed by Qualcomm based on CDMA technology. In March 1992, CDMA was adopted as IS-95 [96]. With IS-95, the basic user data rate is 9.6 kb/s, which is spread by using PN sequence with a chip (clock) rate of 1.2288 Mchips/s (a processing gain of 128). The forward channel supports coherent detection by using a pilot channel (code) for channel estimation. Information on the forward link is encoded by using a rate-1/2 convolutional code, interleaved, spread by using one of 64 Walsh codes, and transmitted in 20 ms bursts. Each MS in a cell is assigned a different Walsh code, thus providing complete orthogonality under ideal channel conditions. Final spreading with a base-specific PN code of length 2 15 is used to mitigate the multiple access interference to and from other cells. One of the major drawbacks of the IS-95 standard is that the coded downlink transmissions are not interleaved across bursts and, therefore, the signal is susceptible to fading. CDMA systems are susceptible to the near-far effect, a phenomenon where MSs close into a BS will swamp out the signals from more distant MSs. For CDMA systems to work well, all signals must be received with the same power, a condition that is difficult to achieve in an erratic land mobile radio propagation environment. To combat the near-far effect, the IS-95 reverse link uses fast closed loop power control to compensate for fluctuations in received signal power due to variations in the radio link. The information on the reverse link is encoded by using a rate-1/3 convolutional code, interleaved, and mapped onto one of 64 Walsh codes. Unlike the forward channel that uses the Walsh codes for spreading, the reverse link uses the Walsh codes for 64-ary orthogonal System (PHS) has been developed. The air interface parameters of various cordless phone standards are summarized in Tab. 1.4 1.4 THIRD GENERATION CELLULAR SYSTEMS In March 1992, WARC approved a worldwide spectral allocation in support of IMT-2000 (International Mobile Telephone by the Year 2000) in the 1885-2200 MHz band. The IMT-2000 standard has been developed by the International Telecommunications Union Radio Communications (ITU-R) and Telecommunications (ITU-T) sectors. Various standards bodies around the world have provided inputs to the IMT-2000 standard definition. The vision of IMT-2000 is to provide ubiquitous wireless network that can support voice, multimedia and high-speed data communication. One of the main attributes of IMT-2000 is the introduction of wireless wide-band packet-switched data services for wireless access to Internet with speeds up to 2 Mb/s. The key principles of IMT-2000 are: Terminal and personal mobility with universal access and worldwide roaming through the use of portable terminals. Personal mobility will be facilitated through the use of personalized telephone numbers. The success of using a wireline telephone depends upon the knowledge of where a called party is located. As a result, 80% of the calls never reach the intended party. With personal communication services (PCS), intelligent networks (INs) will be employed to assume the burden of locating a called party, leaving the subscribers free to roam anywhere in the world. 10 become a nuisance. That is, the subscribers must be able to control their availability for receiving calls. Unified, seamless, infrastructure that will unify diverse infrastructures such as paging, cellular, and satellite networks. In particular, the use of a common band for terrestrial and satellite networks. Integration of mobile and wire-line networks in attempt to achieve the strict QoS controls wire-line networks. Toll line voice quality is one example. Service transparency to provide the same services everywhere but with different data rates. International roaming is also desirable with a virtual home environment. Spectral efficiency, quality, flexibility, and overall cost improvement as a result of the utilization of advanced technologies. The migration to third generation wireless systems presents some difficult challenges for wireless service providers including the following: 12 referring to a CDMA system having a bandwidth of 5 MHz or more. The UWC-136 proposal is the 3G evolution of the IS-136 family of standards. Some parameters of the UWC-136 proposal are shown in Tab. 1.5. UWC-136 meets IMT-2000 requirements by using enhanced modulation techniques (IS-136+) and using a wider band 200 kHz carrier (UWC-136HS) for services that are not possible on the 30 kHz carrier. The UWC-136HS proposal is the same as EDGE (Enhanced Data for Global Evolution) which is an enhanced GSM air interface. EDGE is a system that is the convergence of the GSM and IS-136 family of standards. Table 1.6 summarizes the parameters for the two remaining wide-band CDMA proposals to IMT-2000, namely W-CDMA and cdma2000. The common attributes of wide-band CDMA systems include the following: • provision of multirate services • packet data services major trading areas (MTAs) while blocks C through F correspond to basic trading areas (BTAs). There are 51 MTAs and 492 BTAs in the United States. In addition, 20 MHz of spectrum was reserved for unlicensed use according to FCC Part 15 rules. Of this 20 MHz, 10 MHz is for packet switched applications while 10 MHz is for circuit switched applications.

Performance Analysis of Wireless Network Control Systems Using Different Controllers

2012

Recently Wireless communication technologies have strongly adopted in real-time industrial environments. The increasing availability of products and solutions based on the IEEE 802.11 standard make this kind of communication technology becomes more cost effective in distributed control systems. This paper describes real time control application over Wireless Local Area Network (WLAN) in Ad hoc mode using a Virtual Instrument VI environment (LabVIEW). Particularly the delay time in such networks is considered as a critical factor that has a significant effect on the system response time characteristics such as rise time(T r), settling time(T s). So in this paper we discussed the effect of using different controllers (such as P, PID, Fuzzy, …) on the overall system performance. The experimental measurements show that the using of fuzzy controller gives best results where it can minimizes the effect of the network delay on the system behavior as much as possible.

OVERVIEW OF WIRELESS NETWORK CONTROL PROTOCOL IN SMART PHONE DEVICES

IJRET, 2012

The computer network connection without wire or any cable is referring as wireless network. These wireless local area networks are popular for its worldwide applications. It has covered wide scale wireless local area network. The large scale systems to all applicable areas make large numbers of wireless termination and covering very much area. To reduce the complexity associated with server management, Information Technology organizations begins the process of centralizing servers. It used with architecture principles of centralized management requirement for network to scale, network architecture needs to be able to support enhanced services in addition to just raw connectivity, distributed processing is required both for scalability ability and services, network support continuously increase the level of throughputs etc. Wireless LAN product architectures have evolved from single autonomous access points to systems, consisting of a centralized Access Controller and Wireless Termination Points. The basic goal of centralized control architectures is to move access control, including user authentication and authorization, mobility & radio management, from one access point to centralized controller. The Wireless network Control Protocol allows for access and control of large-scale wireless local area networks. It can allows management of these networks, Control and Provisioning of Wireless Access Points In computer networking, a wireless access point is a device that allows wireless devices to connect to wired network using Wi-Fi, Bluetooth or related standards. The WAP usually connects to a router via a wired network, and can relay data between the wireless devices such as computers or printers and wired devices on the network