logging in or signing up 55 debu555 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 661 Category: Entertainment License: All Rights Reserved Like it (3) Dislike it (0) Added: April 20, 2009 This Presentation is Public Favorites: 0 Presentation Description 5646 Comments Posting comment... By: thakurkaran1 (5 month(s) ago) this is the best presentation in omc-r....plz allow me to download this ppt as early as possible.... Saving..... Post Reply Close Saving..... Edit Comment Close By: Annie89 (25 month(s) ago) plz allow me this ppt, m a telecum student this ppt will help me a lot. plz Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript GLOBAL SYSTEM OF MOBILE COMMUNICATIONS (GSM) : GLOBAL SYSTEM OF MOBILE COMMUNICATIONS (GSM) NETWORK ARCHITECTURE : NETWORK ARCHITECTURE MSC/VLR HLR/ AUC EIR SC/VM OMC BSC BTS PSTN ISDN PSPDN MS BSS MSS Um Abis BIE A F C H MSC/VLR E Allocated GSM Frequency Bands : GSM900 : up: 890~915MHz down: 935~960MHz duplex interval: 45MHz bandwidth: 25MHz, frequency interval: 200KHz GSM1800 : up: 1710-1785MHz down: 1805-1880MHz duplex interval: 95MHz, working bandwidth: 75MHz, frequency interval: 200KHz EGSM900 : up: 880~890MHz down: 925~935MHz duplex interval: 45MHz bandwidth: 10MHz, frequency interval: 200KHz GSM1900MHz: up:1850~1910MHz down:1930~1990MHz duplex interval: 80MHz, working bandwidth: 60MHz, frequency interval: 200KHz Allocated GSM Frequency Bands GSM ENTITIES : GSM ENTITIES VLR dynamically stores subscriber information needed to handle incoming/outgoing calls Manages the mobile subscribers database HLR holds all the switching functions manages the necessary radio resources MSC AUC/EIR Authentication Center(s) (AUC) Handling Mobile Station Equipment Identity Equipment used by mobile service subscribers for access to services. MS INTERFACES : INTERFACES TRAU : Voice conversion 16kbit/s RPE-LTP ?? 64kbit/s A-law PCM codes. Typically TC is located between MSC and BSC. TRAU Base Station Controller : Managing Wireless network-BSS Monitoring BTS Controls: Wireless link distribution between MS and BTS Communication connection and disconnection MS location, handover and paging Voice encoding, transecoding (TC), rate, adaptation, The operation and maintenance functions of BSS. BSC Base Station Controller Base Transceiver Station : Base Transceiver Station (BTS) Wireless transmission Wireless diversity Wireless channel encryption Conversion between wired and wireless signals Frequency Hopping BaseBand Unit: voice and data speed adapting and channel coding RF Unit: modulating/demodulating, transmitter and receiver Common Control Unit: BTS operation and maintenance GSM Network Entity BTS Base Transceiver Station CHANNEL SPECIFICATIONS : CHANNEL SPECIFICATIONS Channel Combinations : Small capacity cell with only 1 TRX TN0: FCCH+SCH+CCCH+BCCH+SDCCH/4(0,_,3)+SACCH/C4(0,_,3); TN1-7: TCH/F+FACCH/F+SACCH/TF The medium-size cell with 4 TRXs 1TN0 group: FCCH+SCH+BCCH+CCCH; 2 SDCCH/8(0,_,7)+SACCH/C8(0,_,7); 29 TCH/F+FACCH/F+SACCH/TF Channel Combinations Cell Mode Layout : Cell Mode Layout Omni-directional cell Adopt omni-directional antenna, the overall directional propagation characteristic is the same. Directional cell In general, cell with multi-sector is in common use. Every directional cell adopts directional antenna. Traffic Measurements : Traffic Measurements Erlang : the traffic intensity of a totally occupied channel (i.e. the call hour of a unit hour or the call minute of a unit minute). For example, the traffic of a channel occupied for 30 minutes in an hour is 0.5 Erlang) GOS: defined as the probability of call blocking or the probability when the call delay time is longer than a given queuing time. Frequency Hopping : Frequency Hopping Reason: counteract Rayleigh Fading scatter interference among multiple calls Types: Base band frequency hopping keeps the transmission and receiving frequency of each carrier unit unchanged, but merely sends FU transmission data to different carrier units at different FN moments. radio frequency hopping controls the frequency synthesizer of each transceiver, making it hop according to different schemes in different time slots. Diversity ion Technology : The multi-path propagation of radio signals causes magnitude fading and delay time. Space Diversity (antenna diversity) Polarization Diversity orthogonal polarization diversity. horizontal polarization and vertical polarization. Frequency Diversity The working principle of this technology is that such fading won’t take place on the frequency outside the coherence bandwidth of the channel. Diversity ion Technology Frequency Reuse Pattern : Frequency Reuse Pattern “4 ´ 3” reuse mode: one group includes 3 sectors /site ,12 frequency which are distributed to 4 sites. Every site owns 3 frequency. Frequency Reuse Pattern : Frequency Reuse Pattern “3 ´ 3” reuse mode: one group includes 3 sectors /site ,9 frequency which are distributed to 3 sites. Every site owns 3 frequency. GSM EQUIPMENT : GSM EQUIPMENT ZXG10 BSS Slide 19: Advantage: 1)Support small capacity network 2)Large capacity network can be constructed in phases Ntrx < 240 1 rack, 1 SCM+ 1 RMM 240 < Ntrx < 480 2 racks ,1 SCM + 2 RMM 480 < Ntrx < 720 3 racks ,1 SCM + 3 RMM 720 < Ntrx < 960 3 racks ,1 SCM + 4 RMM Capacity Configuration of ZXG10-BSC Slide 20: Rack Structure BCTL BNET BATC BBIU BSMU PCU BCTL Layer : M M O O Optional M Mandatory Remark 1 2 1 1 6~12 2 1 Qty. BCTL POWB MON PEPD COMM MP SMEM BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_COMM_MPMP=2 N_COMM_MTP=2 N_COMM_MPPP=2 or 4 or 6 or 8 So: N_COMM=6 or 8 or 10 or 12 BCTL Layer BNET Layer : BNET Layer BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_DSNI_MP=2 N_DSNI_PP_A=2 or 4 N_DSNI_PP_Abis=2 or 4 SO: N_DSNI=6 or 8 or 10 BBIU Layer : BBIU Layer BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_TIC_Abis=N_Abis_E1/4 N_BIPP=N_TIC_Abis/6 BATC Layer : BATC Layer BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_TIC_A=N_A_E1/4 N_DRT_A=N_TIC_A Slide 25: Easy to Expand ZTE BTS Series : ZTE BTS Series BTSV(1) BTSV(2) BS21 MB EMB SBTS BS30 ZXG10-BTS Rack : ZXG10-BTS Rack Slide 28: Receiver sensitivity: -110dBm Power output: 40/80W BTS power control 6 levels static(step: 2dB) 15 levels dynamic(step: 2dB) Rack demension: 1600×600×550 mm3 (H x W x D) Max power consumption: 2200W (12 TRXs) DC voltage input: -40~-57VDC; 19~29VDC Working temperature: -5oC ~ +45oC Relative humidity: 15% ~ 85% Indoor BTS with 12 TRX(ZXG10-BTSV2) Physical structure of ZXG10-BTS(V2) : Physical structure of ZXG10-BTS(V2) Slide 30: Architecture of ZXG10-BTS(V2) Internal bus(control signaling,date flow,clock signal,etc Slide 31: S444 TRX Configuration CMM and TRM : CMM (Controller & Maintenance Module) TRM (Transceiver Module ) CMM and TRM Slide 33: CDU(Combiner Distribution Unit ): one duplexer one combiner(2 to 1) one spliter(1 to 4 with 2 extended outputs ) CDU Slide 34: Each E1(2M) on Abis interface can support 15 TRX, So it can effectively save the transmission cost. 7.2*16k TCH timeslot / TRX = 1.8*64k TCH timeslot / TRX 1*16k signaling timeslot / TRX Since very 4 16k timeslot can be multiplexed to a 64k timeslot, each E1 consists of 32 64k timeslot ? ( n + 1 ) / 4 + n * 1.8 + 1 = 32 ? n = 15 Multiplex ratio on Abis interface is 15:1 OMC-R : OMC-R The adoption of OMC aims at the local or centralized operation and management. So network mode of OMC-R includes two: local networking and centralized networking. They will be introduced in detail later. OMC enables NSS/BSS to connect with upper-level mobile network management center through Q3 interface or DB interface. BTS is managed and maintained by BSC. The local BSC communicates with the server over LAN, and the remote BSC accesses the OMC-R server through centralized networking. The network topology of OMC-R is given in this Fig. One OMC-R can manage 10 MSC, 16 BSC, 4096 BTS OMC-R Structure : OMC-R Structure Slide 37: Local Maintenance Terminal OMC-R Sever BSC 1 Client terminal Router/FE LAN PCM LMT (I) LMT (II) MSC LAN/RS-232 Slide 38: Thank You You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
55 debu555 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 661 Category: Entertainment License: All Rights Reserved Like it (3) Dislike it (0) Added: April 20, 2009 This Presentation is Public Favorites: 0 Presentation Description 5646 Comments Posting comment... By: thakurkaran1 (5 month(s) ago) this is the best presentation in omc-r....plz allow me to download this ppt as early as possible.... Saving..... Post Reply Close Saving..... Edit Comment Close By: Annie89 (25 month(s) ago) plz allow me this ppt, m a telecum student this ppt will help me a lot. plz Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript GLOBAL SYSTEM OF MOBILE COMMUNICATIONS (GSM) : GLOBAL SYSTEM OF MOBILE COMMUNICATIONS (GSM) NETWORK ARCHITECTURE : NETWORK ARCHITECTURE MSC/VLR HLR/ AUC EIR SC/VM OMC BSC BTS PSTN ISDN PSPDN MS BSS MSS Um Abis BIE A F C H MSC/VLR E Allocated GSM Frequency Bands : GSM900 : up: 890~915MHz down: 935~960MHz duplex interval: 45MHz bandwidth: 25MHz, frequency interval: 200KHz GSM1800 : up: 1710-1785MHz down: 1805-1880MHz duplex interval: 95MHz, working bandwidth: 75MHz, frequency interval: 200KHz EGSM900 : up: 880~890MHz down: 925~935MHz duplex interval: 45MHz bandwidth: 10MHz, frequency interval: 200KHz GSM1900MHz: up:1850~1910MHz down:1930~1990MHz duplex interval: 80MHz, working bandwidth: 60MHz, frequency interval: 200KHz Allocated GSM Frequency Bands GSM ENTITIES : GSM ENTITIES VLR dynamically stores subscriber information needed to handle incoming/outgoing calls Manages the mobile subscribers database HLR holds all the switching functions manages the necessary radio resources MSC AUC/EIR Authentication Center(s) (AUC) Handling Mobile Station Equipment Identity Equipment used by mobile service subscribers for access to services. MS INTERFACES : INTERFACES TRAU : Voice conversion 16kbit/s RPE-LTP ?? 64kbit/s A-law PCM codes. Typically TC is located between MSC and BSC. TRAU Base Station Controller : Managing Wireless network-BSS Monitoring BTS Controls: Wireless link distribution between MS and BTS Communication connection and disconnection MS location, handover and paging Voice encoding, transecoding (TC), rate, adaptation, The operation and maintenance functions of BSS. BSC Base Station Controller Base Transceiver Station : Base Transceiver Station (BTS) Wireless transmission Wireless diversity Wireless channel encryption Conversion between wired and wireless signals Frequency Hopping BaseBand Unit: voice and data speed adapting and channel coding RF Unit: modulating/demodulating, transmitter and receiver Common Control Unit: BTS operation and maintenance GSM Network Entity BTS Base Transceiver Station CHANNEL SPECIFICATIONS : CHANNEL SPECIFICATIONS Channel Combinations : Small capacity cell with only 1 TRX TN0: FCCH+SCH+CCCH+BCCH+SDCCH/4(0,_,3)+SACCH/C4(0,_,3); TN1-7: TCH/F+FACCH/F+SACCH/TF The medium-size cell with 4 TRXs 1TN0 group: FCCH+SCH+BCCH+CCCH; 2 SDCCH/8(0,_,7)+SACCH/C8(0,_,7); 29 TCH/F+FACCH/F+SACCH/TF Channel Combinations Cell Mode Layout : Cell Mode Layout Omni-directional cell Adopt omni-directional antenna, the overall directional propagation characteristic is the same. Directional cell In general, cell with multi-sector is in common use. Every directional cell adopts directional antenna. Traffic Measurements : Traffic Measurements Erlang : the traffic intensity of a totally occupied channel (i.e. the call hour of a unit hour or the call minute of a unit minute). For example, the traffic of a channel occupied for 30 minutes in an hour is 0.5 Erlang) GOS: defined as the probability of call blocking or the probability when the call delay time is longer than a given queuing time. Frequency Hopping : Frequency Hopping Reason: counteract Rayleigh Fading scatter interference among multiple calls Types: Base band frequency hopping keeps the transmission and receiving frequency of each carrier unit unchanged, but merely sends FU transmission data to different carrier units at different FN moments. radio frequency hopping controls the frequency synthesizer of each transceiver, making it hop according to different schemes in different time slots. Diversity ion Technology : The multi-path propagation of radio signals causes magnitude fading and delay time. Space Diversity (antenna diversity) Polarization Diversity orthogonal polarization diversity. horizontal polarization and vertical polarization. Frequency Diversity The working principle of this technology is that such fading won’t take place on the frequency outside the coherence bandwidth of the channel. Diversity ion Technology Frequency Reuse Pattern : Frequency Reuse Pattern “4 ´ 3” reuse mode: one group includes 3 sectors /site ,12 frequency which are distributed to 4 sites. Every site owns 3 frequency. Frequency Reuse Pattern : Frequency Reuse Pattern “3 ´ 3” reuse mode: one group includes 3 sectors /site ,9 frequency which are distributed to 3 sites. Every site owns 3 frequency. GSM EQUIPMENT : GSM EQUIPMENT ZXG10 BSS Slide 19: Advantage: 1)Support small capacity network 2)Large capacity network can be constructed in phases Ntrx < 240 1 rack, 1 SCM+ 1 RMM 240 < Ntrx < 480 2 racks ,1 SCM + 2 RMM 480 < Ntrx < 720 3 racks ,1 SCM + 3 RMM 720 < Ntrx < 960 3 racks ,1 SCM + 4 RMM Capacity Configuration of ZXG10-BSC Slide 20: Rack Structure BCTL BNET BATC BBIU BSMU PCU BCTL Layer : M M O O Optional M Mandatory Remark 1 2 1 1 6~12 2 1 Qty. BCTL POWB MON PEPD COMM MP SMEM BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_COMM_MPMP=2 N_COMM_MTP=2 N_COMM_MPPP=2 or 4 or 6 or 8 So: N_COMM=6 or 8 or 10 or 12 BCTL Layer BNET Layer : BNET Layer BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_DSNI_MP=2 N_DSNI_PP_A=2 or 4 N_DSNI_PP_Abis=2 or 4 SO: N_DSNI=6 or 8 or 10 BBIU Layer : BBIU Layer BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_TIC_Abis=N_Abis_E1/4 N_BIPP=N_TIC_Abis/6 BATC Layer : BATC Layer BBIU BCTL-SCU BNET BATC BCTL-RMU BATC N_TIC_A=N_A_E1/4 N_DRT_A=N_TIC_A Slide 25: Easy to Expand ZTE BTS Series : ZTE BTS Series BTSV(1) BTSV(2) BS21 MB EMB SBTS BS30 ZXG10-BTS Rack : ZXG10-BTS Rack Slide 28: Receiver sensitivity: -110dBm Power output: 40/80W BTS power control 6 levels static(step: 2dB) 15 levels dynamic(step: 2dB) Rack demension: 1600×600×550 mm3 (H x W x D) Max power consumption: 2200W (12 TRXs) DC voltage input: -40~-57VDC; 19~29VDC Working temperature: -5oC ~ +45oC Relative humidity: 15% ~ 85% Indoor BTS with 12 TRX(ZXG10-BTSV2) Physical structure of ZXG10-BTS(V2) : Physical structure of ZXG10-BTS(V2) Slide 30: Architecture of ZXG10-BTS(V2) Internal bus(control signaling,date flow,clock signal,etc Slide 31: S444 TRX Configuration CMM and TRM : CMM (Controller & Maintenance Module) TRM (Transceiver Module ) CMM and TRM Slide 33: CDU(Combiner Distribution Unit ): one duplexer one combiner(2 to 1) one spliter(1 to 4 with 2 extended outputs ) CDU Slide 34: Each E1(2M) on Abis interface can support 15 TRX, So it can effectively save the transmission cost. 7.2*16k TCH timeslot / TRX = 1.8*64k TCH timeslot / TRX 1*16k signaling timeslot / TRX Since very 4 16k timeslot can be multiplexed to a 64k timeslot, each E1 consists of 32 64k timeslot ? ( n + 1 ) / 4 + n * 1.8 + 1 = 32 ? n = 15 Multiplex ratio on Abis interface is 15:1 OMC-R : OMC-R The adoption of OMC aims at the local or centralized operation and management. So network mode of OMC-R includes two: local networking and centralized networking. They will be introduced in detail later. OMC enables NSS/BSS to connect with upper-level mobile network management center through Q3 interface or DB interface. BTS is managed and maintained by BSC. The local BSC communicates with the server over LAN, and the remote BSC accesses the OMC-R server through centralized networking. The network topology of OMC-R is given in this Fig. One OMC-R can manage 10 MSC, 16 BSC, 4096 BTS OMC-R Structure : OMC-R Structure Slide 37: Local Maintenance Terminal OMC-R Sever BSC 1 Client terminal Router/FE LAN PCM LMT (I) LMT (II) MSC LAN/RS-232 Slide 38: Thank You