standards and specifications for geodetic control networks

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/06/2014, 22:20

... TDMA for Digital European Cordless Telephone [DECT] and wideband CDMA [W-CDMA]). The standards developed for PCS in North America appear in References [15]–[19]. 15 Introduction Channel Bandwidth ... since 1995. Standards for 3G wireless services were published in 1999. Support for high-speed data at rates from 144 kb/s for urban and suburban outdoor envi- ronments to 2,048 Mb/s for indoor ... band-limited to 300 — 3000 Hz Data Rate 10 kb/s (only for control) Modulation FM for speech, FSK for data Frequency Deviation 12 kHz for speech and 8 kHz for data User Data Transfer Capability None Table...

Ngày tải lên: 02/03/2013, 16:58

... look and feel of the configuration files and command-line interfaces for Cisco routers is also shown in this chapter. The chapter ends with the configuration of a Cisco router for global and interface ... call itself was often long distance. Demand could quickly drive down the price for the hardware, but what could drive the demand for modems and computers, and routers? The answer, of course, turned ... 435 L1_only3A and L1_only3B Configuration 436 Viewing the Routing Table and Link-State Database 437 L1/L2_3to1 Routing Table and Link-State Database 439 L1_only3A and L1_only3B Routing Table and Link-State...

Ngày tải lên: 06/11/2013, 00:15

... band-limited to 300 — 3000 Hz Data Rate 10 kb/s (only for control) Modulation FM for speech, FSK for data Frequency Deviation 12 kHz for speech and 8 kHz for data User Data Transfer Capability None Table ... TDMA for Digital European Cordless Telephone [DECT] and wideband CDMA [W-CDMA]). The standards developed for PCS in North America appear in References [15]–[19]. 15 Introduction Channel Bandwidth ... based on standards IS-54 and IS-136, use a channel spacing of 30 kHz, and Chapter 1 24 1946 First domestic public land mobile service introduced in St. Louis. The system operated at 150 MHz and had...

Ngày tải lên: 23/12/2013, 01:17

... is responsible for formulating emission standards and test- ing procedures, has issued 11 motor vehicle emission control standards and formulated a Management Proce- dure and Technical Policy to control ... amendments mandated im- plementation of federal emission standards identical to 1993 California standards for light-duty vehicles. These Tier 1 emission standards (to be phased in between 1994 and 1996) ... Emission Standards and Regulations 7 Table 1.5 U.S. Federal and California Emission Standards for Heavy-Duty and Medium-Duty Engines — Not applicable NR...

Ngày tải lên: 06/03/2014, 16:20

... Thailand and is also moved into Lao PDR for aquaculture and cage culture. Poecilia reticulata a) (Guppy) This is an ornamental species introduced into Thailand for the aquarium trade and also for ... and Stocking of Exotic Species in the Mekong Basin and Policies for Their Control xii The Impacts of Introductions and Stocking of Exotic Species in the Mekong Basin and Policies for Their Control Tilapia ... Introductions and Stocking of Exotic Species in the Mekong Basin and Policies for Their Control THE IMPACTS OF INTRODUCTIONS AND STOCKING OF EXOTIC SPECIES IN THE MEKONG BASIN AND POLICIES FOR THEIR CONTROL By Robin...

Ngày tải lên: 14/03/2014, 08:48

... pulse and its receipt; and by capacitance, which measures the capacitance between the electrode and the vessel side. Each method has its advantages, and the choice is important for consistent and ... for flow controller FIC. Flow sensor/transmitter FT determines the flow in process fluid #2 line and provides the measurement for controller FIC whose output regulates the material flow via control ... plant chemist and the manufacturers of the pH systems will frequently be involved. Appiled technology and instrumentation for process control 18 Liquid and gaseous fuels can be handled in similar...

Ngày tải lên: 15/05/2014, 11:03

... communications for measurement and control – Fieldbus for use in industrial control systems …. IEC TR 61158-1 Digital data communications for measurement and control - Fieldbus for use in industrial control ... standards for detection, alarm and monitoring sys- tems for protection of persons and property, and for elements used in these systems. e scope includes, but is not limited to: ã intruder and ... Producers âOGP OGP Standards committee has developed a Catalogue of International – IEC and ISO – Standards used in the petroleum and natural gas industries. is report lists about 1300 ISO standards and 700...

Ngày tải lên: 28/05/2014, 14:32

... since 1995. Standards for 3G wireless services were published in 1999. Support for high-speed data at rates from 144 kb/s for urban and suburban outdoor envi- ronments to 2,048 Mb/s for indoor ... standard IS-54, its newer version IS-136, and Global System for Mobile Communica- tions (GSM), are all based on TDMA and FDD. In IS-54 and IS-136, each voice channel has a bandwidth of 30 kHz and ... six time slots. For full-rate speech, three users use these six slots in a certain way. For example, user 1 uses time slots 1 and 4, user 2 time slots 2 and 5, and user 3 time slots 3 and 6. For half-rate...

Ngày tải lên: 18/06/2014, 10:05

... However, standards currently specify N ϭ 1 and 3 only. Subsequences (shown as A 1 , A 2 , . . .) are multiplexed with the power control bits, converted into a parallel form, and then split into I and ... is a sequence of k information bits for which the receiver performance is optimum, then that sequence will be the first k information bits of a sequence that optimize the performance at any later ... has a constraint length 9 and rate 1 / 2 . Spreading In UMTS and cdma2000, signaling and user data is spread twice in succession — first with the channelization codes and later with the scrambling...

Ngày tải lên: 18/06/2014, 10:05

... stations in the serving area and thus may be probable candidates for a handoff. ■ Remaining set Pilots outside of the previous three sets form the remaining set. The handoff procedure is briefly ... as cdmaOne, are based upon IS-95 standards [6], [7]. The spectrum allo- cation is shown in Figure 4-1. The allocation is 50 MHz for cellular systems and 120 MHz for Personal Communications Services ... 3 120 Power Control Reasons for Power Control One of the most important require- ments in a CDMA system is the capability of the user equipment (UE) and base transceiver stations to control their...

Ngày tải lên: 18/06/2014, 10:05

... base station subsystem (BSS). The MSC is responsible for call controls, call routing to and from PSTNs, and switching and controls during a handover process. It connects to a BSS over the A interface. ... Stack cdma2000 takes the information — user data and signaling — from the higher layers and adds two lower-layer protocols before trans- Chapter 4 140 foreign serving area informs the HLR of the home ... circuit-switched data, and short messaging services. The standards work on a packet mode data service in GSM started in 1994, and was completed in 1997. The new system speci- fied by these standards was...

Ngày tải lên: 18/06/2014, 10:05

... defined on both uplinks and downlinks, are avail- able in both FDD and TDD modes, and carry higher-layer data and control information such as voice, video, handoff orders, and signal measurements ... perform signaling and control for non-GPRS services. For example, it can support short messaging service over a GPRS radio channel and efficiently process paging messages and mobile location information ... the higher layers and the control information that is generated at the physical layer. The data portion forms a downlink DPDCH and the control portion a downlink DPCCH. The data format of a downlink...

Ngày tải lên: 18/06/2014, 10:05

... associated transport channel and the mode (that is, FDD or TDD). For example, on a RACH in the FDD mode, this field is 00 for a common control chan- nel and 01 for a dedicated control or traffic channel. Chapter ... Team-Fly đ On the other hand, on a RACH in the TDD mode, that field is 00 for a common control channel and 0100 for a dedicated control or traffic channel. Because multiple ... messages to forward to its upper layer and sends an indication to the RRC layer. The BMC message format is very similar to that of an ISDN call control message and consists of a number of information...

Ngày tải lên: 18/06/2014, 10:05

... protocol for CC and MM functions. The Packet Data Convergence Protocol (PDCP), Broadcast/Multicast Control (BMC), Radio Link Control (RLC), and Media Access Control (MAC) are link layer protocols, and ... Communication Networks Call Controls and Mobility Management CHAPTER 8 8 Copyright 2002 M.R. Karim and Lucent Technologies. Click Here for Terms of Use. necting a call, and allows for a reliable ... that specifies the frame format, functions, and proce- dures for transferring user part information over a signaling data link. MTP Level 3 provides for the distribution and routing of con- nectionless...

Ngày tải lên: 18/06/2014, 10:05

... arrival process is purely random, it is often not easy to compute the required bandwidth for an arbitrary sustainable data rate, peak data rate, and the burst size except for very simple cases. As ... data rate of the incoming call and reserve that bandwidth for the duration of the call. This is possible only if the sum of the bandwidth requirements of the existing and new connections does not ... 5. Admission control and servicing strategies that ensure the requested QoS are presented in sections 6 and 7. Section 8 gives a short description of the DiffServ model and indicates how IntServ and DiffServ...

Ngày tải lên: 18/06/2014, 10:05

Ngày tải lên: 18/06/2014, 10:05

Ngày tải lên: 18/06/2014, 10:05

Ngày tải lên: 18/06/2014, 16:20