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2006080704

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Information about 2006080704
Education

Published on March 26, 2008

Author: Pumbaa

Source: authorstream.com

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ORA000003 CDMA2000 Principle :  ORA000003 CDMA2000 Principle 1.2 Objectives:  Objectives After this presentation, you will be familiar with: the development of mobile communication system the structure of CDMA2000 network the number planning in CDMA2000 network Course Organization:  Course Organization Chapter 1: Introduction Chapter 2: CDMA Techniques & Technologies Chapter 3: CDMA Core Networks Chapter 4: CDMA Number Planning Development of Mobile Communications :  1st Generation 1980s (analog) 2nd Generation 1990s (digital) 3rd Generation current (digital) 3G provides: Complete integrated service solutions High bandwidth Unified air interface Best spectral efficiency and ……………… a step towards PCS AMPS Analog to Digital TACS NMT OTHERS GSM CDMA IS95 TDMA IS-136 PDC UMTS WCDMA CDMA 2000 TD-SCDMA Development of Mobile Communications Introduction Voice to Broadband Transmission Techniques :  Transmission Techniques Traffic channels: different users are assigned unique code and transmitted over the same frequency band, for example, WCDMA and CDMA2000 Traffic channels: different frequency bands are allocated to different users,for example, AMPS and TACS Traffic channels: different time slots are allocated to different users, for example, DAMPS and GSM FDMA TDMA CDMA User User User User User User Introduction 3G Objectives :  3G Objectives 3G is developed to achieve: Universal frequency band for standard and seamless global coverage High quality of service with complete security and reliability Easy and smoothly transition from 2G to 3G, compatible with 2G Provide multimedia services, with the rates: Vehicle environment: 144kbps Walking environment: 384kbps Indoor environment: 2Mbps Introduction Standards for 3G :  Standards for 3G 3G system CDMA2000 3GPP2 FDD mode WCDMA 3GPP FDD mode TD-SCDMA CWTS TDD mode Introduction Development of CDMA :  CDMA2000 307.2kbps Heavier voice service capacity ; Longer period of standby time 1995 1998 2000 2003 Development of CDMA Higher spectrum efficiency and network capacity Higher packet data rate and more diversified services Smooth transit to 3G Introduction CDMA2000 1X Network Structure:  CDMA2000 1X Network Structure MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller MSC: Mobile Switching Center HLR :Home Location Register VLR: Visitor Location Register PCF: Packet data Control Function PDSN: Packet Data Service Node HA: Home Agent FA: Foreign Agent SCP: Service Control Point Radius: Remote Authentication Dial-in User Service Abis A1(Signaling) A2(Traffic) A11(Signaling) A10(Traffic) A3(Signaling & Traffic) A7(Singaling) Introduction Course Organization:  Course Organization Chapter 1: Introduction Chapter 2: CDMA Techniques & Technologies Chapter 3: CDMA Core Networks Chapter 4: CDMA Number Planning Spreading and De-spreading :  Spreading and De-spreading information pulse interference White noise The improvement of time-domain information rate means that the bandwidth of spectrum-domain information is spread. S(f) is the energy density. f S(f) The spectrum before spreading information f0 The spectrum before despreading information Interference/noise S(f) f0 f f0 The spectrum after despreading information Interference/noise S(f) f The spectrum after spreading information f0 S(f) f CDMA Techniques & Technologies The Principle of RAKE Receiver:  The Principle of RAKE Receiver S(t) Transmission signal RAKE Receiver- multi-path fading CDMA Techniques & Technologies The Principle of RAKE Receiver :  The Principle of RAKE Receiver RAKE antennas help to overcome on the multi-path fading and enhance the receive performance of the system CDMA Techniques & Technologies Handoff :  Handoff Soft handoff It is a process of establishing a link with a target sector before breaking the link with the serving sector Softer handoff Like the soft handoff, but the handoff is occurred between multi-sectors in the same base station Hard handoff Hard handoff occurs when the two sectors are not synchronized or are not on the same frequency. Interruption in voice or data communication occurs but this interruption does not effect the user communication CDMA Techniques & Technologies Soft/Softer Handoff :  Soft/Softer Handoff Multi-path combination in the BSC during soft handoff Multi-path combination in the BTS during softer handoffs CDMA Techniques & Technologies Course Contents:  Course Contents Chapter 1 Introduction Chapter 2 CDMA Techniques & Technologies Chapter 3 CDMA Core Network Chapter 4 CDMA Number Planning A typical CDMA Network :  A typical CDMA Network CDMA Core Network CDMA Interfaces :  CDMA Interfaces MSC: Mobile-service Switching Center BSC: Base Station Controller MC: Short Message Center HLR: Home Location Register BTS: Base Transceiver Station VM: Voice Mailbox VLR: Visitor Location Register OMC: Operation & Maintenance Center AC: Authentication Center SCP: Service Control Point Other MSCs MC/VM MSC/SSP/VLR OMC HLR/AC SDH GMSC/SSP SCP STP IOS4.0 SS7 IS-41 IS-41 IS-41 IS-41 Mobile Customer Service Center SS7 TCP/IP SS7 IS-41 BTS BTS BSC MS IS95---- CDMA2000 INTERNET Other PLMNs PSTN/ISDN CDMA Core Network CDMA Services :  CDMA Services Businesses, enterprises Mobile virtual private network Mobile high-speed network access Advertising services Free phone Family Familiarity number Life & amusement Schools, groups Universal account number Sectorized and time shared charge Broadcast news Individuals Individualized services Privacy CDMA Core Network CDMA Feature Services---Example 1 :  CDMA Feature Services---Example 1 Where is my mobile phone? It is lucky to have Ruyi lock! Ruyi lock Features: a mobile phone user can dial the access code and input the PIN code to lock/unlock his mobile phone by using any fixed telephone instead of registering and paying at a business hall. Why can’t I make a call the moment I picked it up? CDMA Core Network CDMA Feature Services---Example 2 :  CDMA Feature Services---Example 2 FOLLOW ME Features: a user can activate call forwarding of his/he MS from any phone to ensure that any incoming call of a mobile phone user will not be lost. You can register for a forwarding service on your own I forgot to bring my mobile phone, but I will have an important customer to meet this afternoon. What should I do? CDMA Core Network CDMA Feature Services---Example 3 :  CDMA Feature Services---Example 3 Does that guy still bother you recently? He can no longer reach me! Why? Ask me to input a password? Friendshipcom Features: After a called user subscribes for this service, the system requires password to caller. A call is accomplished only if the password is correct. Otherwise, the call will be rejected or transferred. CDMA Core Network CDMA Feature Services---Example 4 :  CDMA Feature Services---Example 4 Intra-group user LOOK FOR service Feature 1: When a user makes a call to an intra-group user, the terminals of all intra-group users ring in-turn or simultaneously until there is a reply. CDMA Core Network CDMA2000---Data Services :  CDMA2000---Data Services 0 32 64 9.6 128 144 384 2,000 Video Streaming Voice Text Messaging Still Imaging Audio Streaming Electronic newspaper High-quality videoconference Telephone (Voice) Voice Mail E-Mail Fax Electronic book Sports, news and weather report on demand Singing room Low-quality videoconference JPEG Still Photos Mobile Radio Video Surveillance, Video Mail, Travel Image Data Weather, transportation, news, sports and securities Mobile TV E-commerce Remote Medical Service Data rate in Kbps CDMA Core Network Locating Services :  3GPP2 uses the following 3 standards for MS location: Locating Services GPS-aided measurement Accuracy: suburbs---10m. City zone---30~70m. Indoor --unable to locate Response time: 3~10s Measurement of base station pilot phase Accuracy: 50~200m Response time: 3~6s Locating of a cell ID Accuracy: depends on the size of a cell Response time: within 3s CDMA Core Network Locating Services :  110! Bandit! The system transfers the alarm to the nearest alarm processing center based on the location. An emergency button can be set on a user’s mobile phone to so that an alarm can be reported without any conversation or delay. Locating Services CDMA Core Network Equal Access of Toll Calls :  PSTN CDMA/ INTERNET Users who subscribe for toll services Original toll route Toll route after subscription MSC/GMSC HLR Operators who subscribe for toll services Help mobile operators to absorb large quantities of toll services Users subscribe to select toll operators to ensure quality of service. Enable users to save toll call charge (premium strategy) Make an IP toll call without dialing a preamble Equal Access of Toll Calls CDMA Core Network Course Contents:  Course Contents Chapter 1: Introduction Chapter 2: CDMA Techniques & Technologies Chapter 3: CDMA Core Network Chapter 4: CDMA Number Planning Definition of Coverage Areas :  Definition of Coverage Areas Location area MSC area PLMN area Service area Sector area CDMA Number Planning Cell area Parameters Involved :  Parameters Involved In a CDMA system, the following parameters are defined to identify a user and his location: MIN/IMSI MDN ESN TLDN SID/NID LAI GCI SIN SSN CDMA Number Planning MIN/IMSI :  MIN/IMSI Mobile subscriber identity/international mobile subscriber identity For example, 0907550001/460030907550001 Not more than 15 digits 3 digits 2 digits IMSI MCC MNC MSIN NMSI CDMA Number Planning MDN :  MDN CC + MAC + H 0 H 1 H 2 H 3 + ABCD International mobile subscriber DN National valid mobile subscriber number Mobile directory number For example, 8613307550001 CDMA Number Planning ESN :  ESN A unique Electronic Serial Number (ESN) is used to identify single MS. An ESN includes 32 bits and has the following structure: 31......24 23......18 17......0 bit Manufacturer’s number retained equipment SN For example, FD 03 78 0A (the 10th Motorola 378 mobile phone) The equipment serial number is allocated by a manufacturer. CDMA Number Planning TLDN :  TLDN Temporary local directory number For example, 8613344755001 CDMA Number Planning SID/NID :  SID/NID MSCID (Exchange Identity) = System Identity (SID) + Exchange number (SWIN) is used to represent a certain set of equipment in an NSS network. For example, Unicom CDMA Shenzhen MSC is labeled as 3755+01 CDMA Number Planning Location Area Identity (LAI) :  Location Area Identity (LAI) PAGING message is broadcast within a local area, the size of which depends on traffic, paging bearer capability, signaling flow , etc. Format: MCC+MNC+LAC MCC: Mobile Country Code, 3 digits. For example, China is 460. MNC: Mobile Network Code, 2 digits. For example, the MNC of Unicom is 03. LAC: Location Area Code, a 2-byte-long hexadecimal BCD code. 0000 cannot be used with FFFE. For example, 460030100 CDMA Number Planning Global Cell Identity (GCI) :  Global Cell Identity (GCI) The unique ID of a cell in PLMN Format: LAI+CI CI: Cell Identity, a 2-byte-long hexadecimal BCD code, pre defined by the engineering department. The first 3 digits and the last digit represent the base station number and the sector number respectively. For an omni-directional site, the last digit of CI is 0. For example, 4600301001230 shows base station number 123 contains an omni-directional site CDMA Number Planning Sender Identification Number (SIN) :  Sender Identification Number (SIN) MSC number The MSC number stipulated by Unicom is 460 + 03 + 09 +H0H1H2H3 + 1000. HLR number The HLR number stipulated by Unicom is 460 + 03 + 09 + H0H1H2H3 + 0000. SMC number The SMC number stipulated by Unicom is 460 + 03 + 09 + H0H1H2H3 + 2000. SCP number The SCP number stipulated by Unicom is 460 + 03 + 09 + H0H1H2H3 + 3000. 09 is used by China Unicom, this number is distributed uniquely in the world. CDMA Number Planning Sub-System Number (SSN) :  Sub-System Number (SSN) SSN of MSC: 8 SSN of VLR: 7 SSN of HLR: 6 SSN of AC: 10 SSN of SMC: EE SSN of SCP: EF SSN of A interface: FE/FC SSN of SCCP management: 1 CDMA Number Planning Summary:  Summary Brief Development History of Mobile Communication Analog--digital--code division Objectives of 3G and comparison of 3 systems CDMA network structure and Technical features Service provided in CDMA network Number planning in CDMA Network

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