State of GPRS infrastructure in project relevant countries

Transcription

1 State of GPRS infrastructure in project relevant countries 2nd MobiHealth Project Meeting, September 18, 19 and 20,

2 GPRS Overview Higher data transfer speeds Multislot MS and coding schemes Data rates up to 170kbps GPRS network Packet switched technology Security in GPRS Always connected - always on-line Availability of GPRS coverage / roaming

3 GPRS Network - Logical view BTS BTS BTS BSC PCU FR backbone Network (Gb) MSC/VLR SS7 SGSN SGSN HLR/ AUC SMS GW-MSC IP-backbone (Gn) Other PLMNs (Gp) GGSN GGSN IP networks: ISP Internet Corporate (Gi) BTS BSC PCU Resource Management Mobility Management Session Management extra Security

4 Base Transceiver Station BTS and Base Station Controller BSC BTS BSC PCU BTS Allocation of PDCH in cells in the Packet Control Unit (PCU) / (Radio Resource Management) Handling of GPRS Paging (Mobility Management) Broadcast GPRS information (Session Management)

5 Radio Resource Management Number of temporarily available channels for GPRS (PDCH) Channel Number Channels available to GPRS users Channels used by speech users GPRS capable channels Non- GPRS capable channels time Number of occupied speech channels (TCH) mean PDCH = # TCH - mean speech traffic (served)

6 Uplink/Downlink radio resources - timeslots Downlink MS t = t MS t = t 1 Uplink MS 3 MS t = t 0 MS 4 MS t = t

7 Dedicated or On-Demand GPRS physical channels (PDCH) Common physical channels pool Physical channels pool Need for more PDCH Circuit switched physical channels 2. De-allocation, if unused for a predefined time Example of physical channels reservation Fixed by operator On-demand PDCH 3. De-allocation due to circuit-switched service pre-emption Dedicated PDCH: Only for GPRS

8 GPRS data rates four different coding schemes are defined (CS-1 to CS-4) typically 4 timeslots are supported by the mobile in the downlink at present CS-1 and CS-2 are supported Coding Scheme maximum downlink data rate between 36,2 and 53,6 kbps maximum uplink data rate between 18,1 and 26,8 kbps Bitrate per Timeslot (kbps) Max data rate (kbps) Max data rate (kbps) CS-1 9,05 36,2 18,1 CS-2 13,4 53,6 26,8 CS-3 15,6 62,4 31,2 CS-4 21,4 85,6 42,

9 GPRS Mobile Operation Modes Support for three mode of operation for mobiles: Class A: Operates GPRS and Circuit Switch (CS) services simultaneously. Class B: Monitors the control channels of GPRS and GSM simultaneously but can operate one set of services at one time. Class C: Only CS or GPRS capable

10 GPRS Coverage - General radio aspects Speech GPRS Coverage ~ 9-12 db Set by CS-1 (~ 5-7 db) Service coverage ~ 9-12 db Depends on application (service) Low C/I ( < 10 db) Poor quality / dropped call Low throughput per channel ( < 10 kbps) Medium C/I (10-15 db) Good speech quality High throughput per channel (11-15 kbps) High C/I ( > 15 db) Good speech quality Very high throughput per channel ( > 15 kbps) Cell plan optimized for speech good GPRS coverage

11 Serving GPRS Support Node SGSN Ciphering, authentication, and IMEI check Mobility management Logical link management towards the MS Charging data Packet routing & transfer IP Network Gi (IP) SGSN Gn GGSN

12 GPRS Mobility Management IDLE GPRS Attach GPRS Detach or Cancel location Implicit Detach or Cancel Location IDLE Not GPRS attached READY Packet transfer/idle STANDBY Packet Idle READY READY timer expiry or Force to STANDBY or Abnormal RLC condition STANDBY PDU reception

13 Location area (LA), routing area (RA) and cell identity (CI) RA1 RA2 RA3 LAI=LA1 CG11 CG21 CG31 RAI=LAI+RAC RAI:Routing Area Identification RAC:Routing Area Code LAI:Location Area Identification CGI=LAI+CI CGI: Cell Global Identity CI: Cell Identity Idle state: GPRS Mobile not known in the system Standby state: GPRS Mobile known on routing area level (RAI) Ready state: GPRS Mobile known at cell change (CGI)

14 Gateway GPRS Support Node GGSN External interfaces Access functionality Traditional gateway functionality Subscriber addresses publish Routing GGSN Gi (IP) IP Network

15 GPRS Attach Procedure BTS BSC MSC/VLR Gb Gr HLR IP Network SGSN Backbone GGSN GPRS Attach (Class A/B) is a two step procedure IMSI attach to contact the CS world GPRS attach to get a connection towards the SGSN and to update the GPRS mobile location (on routing area level)

16 PDP Context Activation - getting in contact BTS BSC HLR Gb Gr DNS RadiusDHCP APN: ericsson.se SGSN Gn Gn GGSN (B) Gi Backbone APN IP ericsson.se Corp. Network SGSN resolves an Access Point Name (APN) into the IP address using a DNS GGSN receives PDP Address (IP address of the mobile) from RADIUS (static or dynamic)

17 Security Guard - Gi Interface IP Network GGSN Gi Interfaces to ISPs (and corporates) using standard IP-based protocols. Security functions Firewall (packet filtering) Authentication, integrity and confidentiality (IPSEC, tunneling, key exchange) Routing functions Static/dynamic routing supported

18 Gi Interface - Security Guard ISP GGSN Gi (IP) Internet IPsec Operator Firewall + VPN Firewall + VPN Introduction of Firewalls and virtual private networks (VPNs) to enhance security over the internet (end-to-end) security IPSec is establishes a point-to-point connection

19 HPLMN GPRS Roaming BG Border Gateway HPLMN Home Network VPLMN Visiting Network GTP GPRS Tunneling Protocol BSS SGSN GGSN HLR BG SS7 VPLMN BG Host1 BSS SGSN GTP-Tunnel

20 GPRS Roaming Exchange (GRX) BG Border Gateway HPLMN Home Network VPLMN Visiting Network GRX GPRS Roaming Exchange R Router PLMN1 DNS BG GGSN Simplifies connections Simplifies agreements Enhances transmission R PLMN2 DNS BG R GRX R PLMN3 BG DNS SGSN SGSN

21 Connections between PLMN and GRX BG Operator A BGP routing between Operator and GRX provider Layer 3 IPSec VPN tunnel Layer 2 Frame Relay/ATM PVCs R BG GRX R R The GRX-network shall be considered as secure! BG Operator B BG Layer 1 Layer-1 link Operator C

22 Spain - Operator Info Three operators offer GPRS technology Amena Telefonica Moviles Vodafone

23 Spain - Deployment status In Spain, every operator has a GPRS network deployed Operator Commercial Supplier Amena Jun 01 Ericsson/Siemens Telefonica Jan 01 Ericsson/Motorola/Nokia Vodafone May 2001 Ericsson

24 Spain - GSM Coverage by operator* * source: data july

25 Spain - Data Rate Capabilities* On average, each Operator allows 1-4 TS in DL and 1-2 TS in the uplink and is using CS-2 Operator Coding Scheme DL Coding Scheme UL No TS DL No Ts UL DL data rate [kbps] UL data rate [kbps] Amena CS-1 / CS-2 CS-1 / CS ,1-53,6 9,05-13,4 Telefonica CS-2 CS-1 / CS ,4-53,6 13,4-26,8 Vodafone CS-2 CS-1 / CS ,4-53,6 13,4-26,8 * The information on this page is taken from the respective homepage and may be subject to changes

26 Spain - Features* Every operator has secure IP measures introduced (IPSec) Virtual Private network are available Dedicated PDCH deployed in city area (special zones) in the Telefonica network Operator Security VPN Dedicated PDCH PDP Address Amena IPSec yes n/a n/a Telefonica IPSec yes Some PDCH statically asigned to GPRS and some dynamically shared for GPRS and CSD. The radio allocation depends on the zones. dynamic Vodafone IPSec yes n/a n/a * The information on this page is taken from the respective homepage and may be subject to changes ** no information available

27 The Netherlands - GPRS Operator Five Opertors Ben Nederland Dutchtone KPN Mobile O2 Vodafone Libertel

28 The Netherlands - Deployment Status* Four out of five operators have GPRS network in service Dutchtone is currently deploying a GPRS network Operator Status Commerical Supplier Ben Nederland In Service Dec 01 Nokia Duchtone In Deployment Nov 02 Alcatel / Nokia KPN Mobile In Service Dec 00 Nokia/Ericsson O2 In Service Nov 01 Ericsson Vodafone Libertel In Service Apr 01 Ericsson * The information on this page is taken from the respective homepage and may be subject to changes

29 The Netherlands - GSM Coverage by operator* * source: data july

30 The Netherlands - Data Rate Capabilities* Detailed information about operators in the Netherlands could not be retrieved in time => assumptions Operator Coding Scheme DL Coding Scheme UL No TS DL No Ts UL DL data rate [kbps] UL data rate [kbps] Ben Nederland CS-2 CS up to 53,6 9,05-18,1 Duchtone KPN Mobile CS-2 CS up to 40,2 9,05-18,1 O2 CS-2 CS up to 53,6 9,05-18,1 Vodafone Libertel CS-2 CS up to 53,6 9,05 * The figures presented on this page are assumptions and could not be approved by the time the presentation was compiled

31 Germany Four GPRS Operator E-Plus O2 T-Mobile Vodafone D

32 Germany - Deployment Status All four operators have a GPRS network in service Operator Status Commeri cal Supplier E-Plus In Service Mar 2001 Nokia O2 In Service Jan 01 Nokia T-Mobile In Service Jun 00 Ericsson / Motorola / Lucent Vodafone D2 In Service Nov 99 Ericsson / Siemens

33 Germany - GSM Coverage by operator* * source: data july

34 Germany - Data Rate Capabilities* The GPRS data rate configuration is the same for every german operator Operator Coding Scheme DL Coding Scheme UL No TS DL No Ts UL DL data rate [kbps] UL data rate [kbps] E-Plus CS-2 CS ,4-53,4 13,4-26,8 O2 CS-2 CS ,4-53,5 13,4-26,8 T-Mobile CS-2 CS ,4-53,6 13,4-26,8 Vodafone D2 CS-2 CS ,4-53,7 13,4-26,8 * The information on this page is taken from the respective homepage and may be subject to changes

35 Germany - Features* T-Mobile is using dedicated PDCH in some cases Operator Security VPN Dedicated PDCH E-Plus IPSec yes n/a n/a O2 IPSec yes n/a n/a T-Mobile IPSec yes in some cases *** Vodafone D2 IPSec yes no *** PDP Address * The information on this page is taken from the respective homepage and may be subject to changes n/a no information available *** push networks are supported to automatically download s to the MT

36 Sweden Three operators Tele2 Telia Mobitel Vodafone Sweden

37 Sweden - Deployment Status All three operators have a GPRS network in service Operator Status Commerical Supplier Tele2 In Service Oct 2001 Motorola/Siemens Telia Mobitel In Service Feb 01 Ericsson Vodafone Sweden In Service Sep 01 Nokia

38 Sweden - GSM Coverage by operator* * source: data july

39 Sweden - Data Rate Capabilities* The uplink data rate was not specified by the various operators it can be assumed, that at least 18,1 kbps is possible (1-2 TS and CS-1) in the uplink Operator Coding Scheme DL Coding Scheme UL No TS DL No Ts UL DL data rate [kbps] Tele2 CS-2 n/a 1-4 n/a up to 53,6 n/a Telia Mobitel CS-2 n/a up to 53,6 n/a Vodafone Sweden CS-2 n/a 1-4 n/a up to 53,6 n/a UL data rate [kbps] * The information on this page is taken from the respective homepage and may be subject to changes

40 Sweden - Features* It can be assumed, that dynamic PDP addresses are used Operator Security VPN Dedicated PDCH Tele2 IPSec yes n/a n/a Telia Mobitel IPSec yes n/a n/a Vodafone Sweden IPSec yes n/a n/a PDP Address * The information on this page is taken from the respective homepage and may be subject to changes n/a no information available

41 Open Issues - Thinks to consider Service availability / Coverage (deep) indoor GSM (GPRS) coverage is not given in all networks are PDCH available during busy hour in the cities (dedicated PDCH?) Mobility / Roaming Roaming is important at the border line of a country Vodafone and T-Mobile have GPRS roaming partners in the EU GPRS roaming still has to be extended

42 Open Issues - Thinks to consider Traffic Volume/Charging the amount of traffic has to be forecasted in order to estimate monthly charging fees all operators offer business tariffs with maximum amount of free data per month and a cheap price per MB. Monitoring / data on demand is it possible to trigger measurements or read data from the BAN (static PDP addresses available or any other scheme?) Positioning Positioning on cell level is only possible in READY mode, otherwise on RA level

43 State of GPRS infrastructure in project Ericsson relevant countries?2nd MobiHealth Project Meeting, September 18, 19 and 20,