gsm gprs and edge performance

... GSM, GPRS EDGE Performance AND Evolution Towards 3G/UMTS Second Edition Edited by Timo Halonen Nokia Javier Romero and Juan Melero TarTec GSM, GPRS AND EDGE Performance GSM, GPRS EDGE Performance ... acronym GSM, GPRS and EDGE Performance 2nd Ed Edited by T Halonen, J Romero and J Melero  2003 John Wiley & Sons, Ltd ISBN: 0-470-86694-2 GSM, GPRS and EDGE Performance 1.1 Standardisation of GSM Phased ... Allocation 7.2.4 (E )GPRS Scheduler 7.2.5 GPRS and EGPRS Multiplexing 7.2.6 Power Control 7.3 GPRS System Capacity 7.3.1 Introduction 7.3.2 Modeling Issues and Performance Measures 7.3.3 GPRS Performance...

Ngày tải lên: 03/06/2014, 01:19

... chung GSM 1800 xem phần phụ lục, đề cập đến khác GSM 900 GSM 1800 GSM 1900 viết dựa GSM 1800 có thay đổi cho phù hợp với chuẩn ANSI (American National Standards Institude) Mỹ 1.3 Kiến trúc mạng GSM: ... Support Node SGSN: Serving GPRS Support Node Tổng quan mạng GSM GPRS 27 Đồ án tốt nghiệp Nguyễn Minh Ngọc – 06TM-02ĐT Chương Kiến trúc GPRS Các công nghệ GSM/ GPRS/ EDGE có sở tảng kỹ thuật truy ... kể đến Mạng GPRS hệ thống GSM có đặc điểm sau: - Tương tác GPRS mạng GSM thông qua hệ thống báo hiệu số - MSC VLR không thực cần thiết định tuyến liệu GPRS dùng kết nối GPRS mạng GSM - HLR chứa...

Ngày tải lên: 22/11/2012, 09:13

... cung cấp hệ thống GSM chi tiết Tính bảo mật GPRS (General Packet Radio Service) đề cập Để nắm vững an ninh GSM GPRS, mục 2.2 mục 2.3 đưa giới thiệu ngắn GSM kiến trúc hệ thống GPRS bảo mật liên ... 3.4.3.1 Tính bảo mật GPRS Mạng GPRS cần đặc tính an ninh Tuy nhiên phạm vi mã hóa khác Phạm vi GSM BTS MS Phạm vi GPRS từ SGSN đến MS Một thuật toán viết mật mã GPRS- A5 sử dụng chất GPRS traffic Viết ... ninh GPRS tương đương với an ninh GSM có SGSN thực quy trình cài đặt mật mã xác thực dựa thuật toán, khóa tiêu chí GSM có GPRS sử dụng thuật toán mã hóa tối ưu hóa để truyền liệu gói.Điện thoại GPRS...

Ngày tải lên: 05/09/2013, 19:14

... United States and legislators and regulators have been quick to respond to the latest corporate scandals Despite the debate among the academic and business presses, political parties and government, ... compensation and firm performance in a particular industry or across industries and across the three levels of managerial discretion Definitions and Key Terms The following definitions and terms ... Prices, Standard and Poor’s Compustat database, and each firm’s annual reports CEO total cash compensation (salary plus bonus), stock option grants and exercise prices, CEO age and tenure and CEO shareholdings...

Ngày tải lên: 11/09/2013, 11:44

... load, and making long-term projections 44 CHAPTER ■ MEASURING AND TUNING PERFORMANCE Analysis and General Guidelines Optimal performance of the MCMS installation depends on the Web server’s and ... 40 CHAPTER ■ MEASURING AND TUNING PERFORMANCE Performance Optimization Optimal performance is primarily based on the speed at which a page is served Testing performance, therefore, requires ... Examine page size and reduce the use CHAPTER ■ MEASURING AND TUNING PERFORMANCE 53 of graphics and placeholders to minimize latency for page turnaround Consider your site’s bandwidth requirements...

Ngày tải lên: 05/10/2013, 14:20

Ngày tải lên: 16/10/2013, 13:15

... described by two vectors g1 = 101] and g2 = 111] and the corresponding code word c2 c1 ], where c1 =4 b2 b1 b0 7g and c2 =4 b2 b1 b0 (1.17) 7g (1.18) and where b0 , b1 , and b2 are the three bits in ... g1(z) = + z2 and g2(z) = + z + z2 (1.19) where denotes the present input bit, and z and z2 represent the previous input bits having one and two clock period delays, respectively, and + is modulo ... with the path loss and fast and slow fading, and ISI may be introduced as a result of multiple, different length paths between the transmitter and receiver In the case of GSM, any ISI introduced...

Ngày tải lên: 07/11/2013, 16:15

... 1980-84, 1985-89, and 1990-94 OLS and random effects regressions include a constant term and dummies for East Asia, Latin America, Sub-Saharan Africa, socialist countries, OECD members, and oil exporters ... Guinea-B Italy Poland Mexico Ecuador Israel Paraguay Hungary Banglade Guatemal NorwayTrinidad ColombiaDominica JapanIceland Finland Uganda Sri Canada Costa Ri France United K Ireland Lank Philippi ... Growth: Hills, Plains, Mountains, Plateaus and Cliffs,” unpublished paper, World Bank, October 1997 Przeworski, Adam, and Fernando Limongi, “Political Regimes and Economic Growth,” The Journal of Economic...

Ngày tải lên: 09/12/2013, 20:15

... signalling random variable of the error in S (dB) random variable of the power control error in the received interference power random variable with standard deviation σe shadow fading random variable ... the variations in the terrain and the distribution of buildings and streets We allow for these variations by introducing a random variable λ having zero mean and standard deviation σ Often λ is ... is 0.2 dB, 0.9 dB, and 2.1 dB for δ having a standard deviation of dB, dB and dB, respectively, irrespective of the voice activity factor and cluster size 3.4 Macrocellular GSM Network: Down-link...

Ngày tải lên: 14/12/2013, 23:15

... The filter pass band extends from to f p and the stop band extends from fs to ∞ Within the pass band the filter response is prescribed within the limits δ1 , and within the stop band the filter response ... positioned in such a way as to allow sufficient guard bands between other services operating above and below the cellular band and between the A and B services Consequently, the CDMA carriers are ... PNI and PNQ codes, baseband filtered and modulated onto two quadrature carriers using the phase mapping described in Table 4.7 The PNI and PNQ codes have the same offset as the pilot channel and...

Ngày tải lên: 14/12/2013, 23:15

... interfering mobile and zeroth BS, is rj = q D2 j + r2 2D j r cos(ϕ) (5.81) and ζ is the difference between λi j and λ0, the independent random variables with zero mean and standard deviation σ ... functions, and ζ j ζk and ζl are Gaussian random variables each having a p standard deviation of 2σ If φ( ) ( ) is not 1, then handover occurs Because Iext =S is a function of the random variables ... the ith mobile in the jth cell, and ε is a random variable p having zero mean and normal distribution with a standard deviation of σε = 2σe From Equations (5.82) and (5.100), the total intercellular...

Ngày tải lên: 14/12/2013, 23:15

... UWC-136 IMT EDGE proposal The evolution of GSM to EDGE and IS-136 to EDGE is now undertaken jointly by ETSI and the UWC Consortium Consequently, EDGE will be compatible with both GSM and IS136 ... the EDGE technology (Phase 1) will be used to enhance the GPRS and HSCSD services, leading to enhanced GPRS (EGPRS) and enhanced circuitswitched data (ECSD) In later releases of EDGE (Phase and ... (MSC) and gateway MSC (GMSC) are for circuit-switched GSM networks Because GSM Phase 2+ will also accommodate GPRS, and therefore handle packet data, there is a serving GPRS support node (SGSN) and...

Ngày tải lên: 14/12/2013, 23:15

... efficient and comprehensive way of improving performance of search and reducing the impact of indexing on the system Both search queries and data indexing are faster with Windows Search 4.0, and indexing ... computer’s performance Check Performance with Task Manager Task Manager provides information about applications and processes that are currently running on a computer, and also provides real-time performance ... effects, you can right click your desktop and click Personalize In the Personalize appearance and sounds window, click Windows Color and Appearance and chose a theme Make sure the Enable transparency...

Ngày tải lên: 17/12/2013, 13:15

... The filter pass band extends from to f p and the stop band extends from fs to ∞ Within the pass band the filter response is prescribed within the limits δ1 , and within the stop band the filter response ... positioned in such a way as to allow sufficient guard bands between other services operating above and below the cellular band and between the A and B services Consequently, the CDMA carriers are ... PNI and PNQ codes, baseband filtered and modulated onto two quadrature carriers using the phase mapping described in Table 4.7 The PNI and PNQ codes have the same offset as the pilot channel and...

Ngày tải lên: 23/12/2013, 17:15

... interfering mobile and zeroth BS, is rj = q D2 j + r2 2D j r cos(ϕ) (5.81) and ζ is the difference between λi j and λ0, the independent random variables with zero mean and standard deviation σ ... functions, and ζ j ζk and ζl are Gaussian random variables each having a p standard deviation of 2σ If φ( ) ( ) is not 1, then handover occurs Because Iext =S is a function of the random variables ... the ith mobile in the jth cell, and ε is a random variable p having zero mean and normal distribution with a standard deviation of σε = 2σe From Equations (5.82) and (5.100), the total intercellular...

Ngày tải lên: 23/12/2013, 17:15

... for GSM9 00 and DCS1800 Development of base station system testing procedures for GSM9 00, DCS1800 and UMTS Specification of the subscriber identity module and mobile equipment interface for GSM9 00, ... within the GSM network, and accepts data from the GSM network and converts it into a radio signal that can be transmitted to the MS The BTSs are used to form the coverage cells in GSM and it is ... and handover The GSM specifications use the term MSC area to describe the part of a network that is covered by a particular MSC and its associated BSCs and BTSs The interface between the MSC and...

Ngày tải lên: 24/12/2013, 08:17

... 1977; and Harris and Raviv, 1990); corporate control issues (Harris and Raviv, 1988); and in particular, asymmetric information (Myers and Majluf, 1984; Myers, 1984) and taxation (DeAngelo and ... firm performance (Reese and Cool, 1978; Long and Ravenscraft, 1984; Abdel Shahid, 2003, among others) The stock market efficiency and other economic and political factors could affect a firm performance ... debt/total assets ↑↑ (2007) performance performance Margaritis and Leverage ↑↑ efficiency Psillaki (2010) Manawaduge, Leverage ↑↓ ROA and ↑↑ Zoysa and Tobin’s Q Chandrakumar a (2010) Source:...

Ngày tải lên: 26/12/2013, 15:19

Ngày tải lên: 24/01/2014, 11:20