Tài liệu GSM doc

... ORGANIZATION 4. GSM NUMBERING 5. GSM CALLING (MOC, MTC) Overview 1. INTRODUCTION TO GSM 2. GSM ARCHITECTURE a. Components b. Interfaces Overview 1. INTRODUCTION TO GSM a. What is GSM b. GSM services c. History d. GSM ... for ETACS, D- AMPS/AMPS  Adapted for GSM in 1993 “Jane”  Introduced by Ericsson in 1996  Several version manufactured for AMPS, GSM, DCS, PCD1900...

Ngày tải lên: 25/12/2013, 09:15

... Prentice-Hall, 1996. [7] Redl S.M., M.K. Weber and M.W. Oliphant, An Introduction to GSM, Artech House, 1995. [8] Heine G., GSM Networks, Artech House, 1999. [9] Lee C C. and R. Steele, Signal-to-interference ... Dehghan and A. Collard, Teletraffic per- formance of GSM- 900/DCS-1800 in street microcells, IEEE Commun. Mag., 33, Mar. 1995, 102–108. 3.3. MACROCELLULAR GSM NETWORK: UP-LINK T...

Ngày tải lên: 14/12/2013, 23:15

... actual GSM world was quite minimal: Due to the late timeframe, O&M systems unaffected by the new standards were largely up and running throughout the GSM world. 18.4 The Elaboration of the GSM ... operators. There was another reason why O&M gained more attention as GSM started growing. The analogue networks existing before GSM were quite small and not much effort was require...

Ngày tải lên: 15/12/2013, 05:15

... global GSM/ UMTS communications. Venezuela, with GSM in 900 MHz, is considering the possi- bility of deploying GSM1 .8 GHz in combination with the IMT2000 core-band/UMTS. So the wide adoption of GSM ... American countries. GSM already reached 500 million users in May 2001. GSM networks operate in 168 countries. GSM systems serve 69% of all digital mobile users. Therefore GSM can...

Ngày tải lên: 15/12/2013, 05:15

... bits of the mask carry the pilot Chapter 4 The cdmaOne System 4.1 Introduction In contrast to the GSM system, which was designed and developed by a number of different organisations working together, ... world. At this point it is important to clarify the terminology we shall be using in the remainder 205 GSM, cdmaOne and 3G Systems. Raymond Steele, Chin-Chun Lee and Peter Gould Copyright...

Ngày tải lên: 23/12/2013, 17:15

... Figure 3.2 shows the system architecture of a GSM Public Land Mobile Network (PLMN) with essential components. The hierarchical construction of the GSM infrastructure becomes evident again. The ... the Integrated Services Digital Network,ISDN [7]) are handled by a dedicated Gateway 3 Figure 3.1: GSM system hierarchy GSM Switching, Services and Protocols: Second Edition. Jo È rg Ebersp...

Ngày tải lên: 23/12/2013, 17:15

... of the speech 2.3. THE GSM RADIO INTERFACE 77 Figure 2.2: Block diagram of a GSM transmitter and receiver. 2.3.1 The GSM modulation scheme The modulation scheme used in GSM is Gaussian minimum ... allow GSM9 00 operators to provide more capacity in urban areas. For this reason, the frequency bands described above are sometimes called the primary GSM9 00 bands (P -GSM9 00). The ex- t...

Ngày tải lên: 24/12/2013, 08:17

... acceptable quality can be conducted. GSM systems achieve a good speech quality with an SNR of about 11 dB. With frequency hopping a value of 9 dB is suf®cient. GSM provides for an optional frequency ... activate frequency hopping. 5.2 Physical Channels 69 Figure 5.7: GSM full-rate traf®c channel with frequency hopping 5.2.4 Summary A physical GSM channel is de®ned by a sequence of fre...

Ngày tải lên: 20/01/2014, 23:20

... in GSM Channel Polynomial TCH/FS x 3 1 x 1 1 DCCH and CCCH (part.) (x 23 1 1)(x 17 1 x 3 1 1) RACH x 6 1 x 5 1 x 3 1 x 2 1 x 1 1 SCH x 10 1 x 8 1 x 6 1 x 5 1 x 4 1 x 2 1 x 1 1 implemented in GSM. ... encrypted data is subsequently 6 Figure 6.1: Basic elements of GSM transmission chain on the physical layer at the air interface GSM Switching, Services and Protocols: Second Edition. Jo È...

Ngày tải lên: 20/01/2014, 23:20

... reasons, security management is also limited to GSM- speci®c areas. The resulting GSM TMN architecture is shown schematically in Figure 10.4. In GSM, the BSC and the MSC have a Q3 interface as ... as 10.3 TMN Realization in GSM Networks 237 Figure 10.4: A simple TMN architecture of a GSM system (according to [57]) Figure 10.5: Potential signalling interfaces in a GSM TMN managed obj...

Ngày tải lên: 20/01/2014, 23:20