JOURNAL OF CTBU(Nat. Scien. Edit. ) Feb : X(2004) : GTP, ,, GGSN( Gateway GPRS Support Node) PDP(Packet Data Proto2

Transcription

1 21 1 Vol. 21 No. 1 ( ) JOURNAL OF CTBU(Nat. Scien. Edit. ) Feb : X(2004) GTP GSN 1, 2 (1., ; 2., ) : GTP, ; GTP GSN SGSN GGSN : ; GPRS ; GPRS : TN :B GTP( GPRS Tunnelling Protocol) GPRS GSN( GPRS Support Node),, GGSN( Gateway GPRS Support Node) PDP(Packet Data Proto2 col), QOS UDP TCP GGSN GTP IP RADIS, GTP 1 GTP 1. 1 GPRS GPRS 1 GSN PLMN Gn,Gn,GTP IP Gn GTP, UDP/ IP, 3386 ; T - PDU, UDP ; T - PDU, TCP GTP TID(Tunnel Identifier) MM PDP GTP TID PDP, Message Type 255, ; Message Type 255, PDP, TID PDP, GTP GGSN,PDP PDP, GTP SNDCP(SubNetwork Dependent Convergence Protocol),PDP Relay SNDCP, SNDCP MS 1. 2 GTP GTP GRPS GSN 2 B, GSN T - PDU GTP T - PDU G - PDU GPRS, G - PDU GTP T - PDU, GTP TID,, : ; : : : ( ),,,,

2 50 ( ) 21 TID Create PDP Context T - PDU SGSN T - PDU GSN, GTP, QOS QOS, TCP/ IP ;QOS, UDP/ IP IP ( :ATM E1 ) GRPS GSN IP,GTP IP, 1. 3 GTP GTP,, GSN GSN GTP, 2 A GTP GTP, GSN, GTP GSM , 4 : (1) GSN, GSN GSN, GSN (2), MS SGSN(Serving GPRS Support Node) T - PDU (3), PDP (4) GPRS SGSN, SGSN, GTP 1. 4 GTP (1) Echo Request Echo Response GTP Echo Request Echo Response, GSN Echo Request Echo Response Echo Request GSN,, (2) Create PDP Context Request Create PDP Context Response GSN SGSN Create PDP Context Re2 quest PDN QOS QOS, SGSN PDP ; RADIS, SGSW (3) Create AA PDP Context Request Create AA PDP Context Response SGSN ID(AA- TID), GGSN Create AA PDP Context Request, GGSN SGSN PDP APN QOS PDP config PDP, ID, SGSN Create AA PDP Context Response, GGSN, SGSN ;SGSN GGSN, MS Activate AA PDP Context Accept (4) Delete AA PDP Context Request Delete AA PDP Context Response PDP, PDP, GGSN PDP GGSN, GGSN, (5) Delete PDP Context Request Delete PDP Context Response GGSN SGSN PDP,SGSN GGSN PDP,GGSN PDP (6) Update PDP Context Request Update PDP Context Response SGSN PDP QOS,SGSN GGSN PDP ( SGSN ), QOS PDP,GGSN, GGSN QOS QOS, QOS SGSN PDP,

3 1 : GTP GSN 51 (7) PDU Notification Request Send Routeing Information for GPRS Request GGSN PDN (Packet Data Network) PDP PDU ; GGSN HLR GPRS, MS SGSN ; HLR,, HLR, ;,GGSN HLR SGSN PDU, MS ;SGSN GGSN PDU MS PDP (8) PDU Notification Reject Request Failure Report Request MM IDLE SGSN IMSI,SGSN GGSN PDU Notification Response, SGSN MM, MNRG 1, MS, HLR MS ; MS SGSN PDP MS,SGSN GGSN PDU Notification Reject Request, GGSN PDU Notification Reject Response ; SGSN GGSN IMSI, GGSN HLR,HLR SGSN GGSN SGSN,GGSN SGSN PDU Notification Request ; HLR SGSN GGSN SGSN, GGSN HLR Failure Report, HLR IMSI MNRG, GGSN IMSI GGSN, HLR Failure Report Ack GGSN (9) Note MS GPRS Present Request SGSN MS Attach Request, MS MM, MNRG= 1,SGSN HLR, MNRG; MS MM,SGSN HLR ; HLR IMSI MNRG = 1,HLR IMSI GGSN Note MS GPRS Present, MS, HLR MNRG (10) Identification Request MS ATTCH,SGSN MS RA, MS DisATTCH,SGSN OLD SGSN IMSI ;Old SGSN MM, IMSI, New SGSN I2 dentification Response,New SGSN ;Old SGSN IMSI, New SGSN Identi2 fication Response,New SGSN ; MS IMSI (11) SGSN Context Request MS New SGSN, MS RA Old SGSN, MM PDP SGSN Context Request ;Old SGSN MM PDP GTP New SGSN 2 GTP GSN 2. 1 GTP GSN (1) GTP SGSN SGSN GTP, GMM/ SM( GPRS Mobility Management/ Session Man2 agement) GTP GMM SM SNDCP IP GTP IP GGSN, SNDCP, PDP SM, GMM GMM ( 3) (2) GTP GGSN GGSN GTP PDN, SM PDP, IP IP RADIS, OMC, OMM 2. 2 GTP SGSN (1) GTP GSN PDP GMM MAP

4 52 ( ) 21 5,,SGSN GTP GRPFE( GPRS Route Process Function Entity) GPPFE( GPRS Protocol Process Function Entity) GRPFE IMSI TLLI P - TMSI, SGSN GTP GPPFE GSN GSN,, GRPFE GMM MAP, TID GPPFE GTP, GRP,, GPPFE, GRPFE, GPPFE GTP GRPFE GTP, GRPFE GPPFE PDP GPPFE, GPPFE PDP,, GPPFE GRPFE GRPFE Gn GTP,GPPFE GRPFE GTP GPPFE,GPPFE GRPFE GRPFE GTP, GPPFE (2) GRPFE GTP 4,GPPFE GTP 5 GSN ; TCP QOS, GPPFE TCP, GPPFE GRPFE TCP GRPFE Gn ;UDP SNDCP ; GMM GMM ; PDP ;OMC OMC 2. 3 GTP GGSN (1) Compact PCI GGSN 6 MCP750HA, PCI, LAN WAN GGSN,,, PCI, GGSN GTP, PDP,, GPRS GTP, ( IP GGSN ), CPU GTP, GTP PDP, GTP, PDN ( Packet Data Network) Gi PDN PDN, PDN IP, GTP,, GPRS, SGSN (2) GTP 7, TCP OMC GTP, : GTP,

5 1 : GTP GSN 53, ;, GTP,, TCP TCP, QOS, GSN OMC OMC GTP, UDP SM IP UDP Gi, SM SM PDP PDP HLR IP IP RADIS IP : [1 ] ETSI, Digital cellular telecommunication system ( Phase 2 + ), General Packet Radio Service ( GPRS), GPRS Tunnelling Protocol ( GTP) across the Gn and Gp Interface, GSM , 2000 [2 ] ETSI, Digital cellular telecommunication system ( Phase 2 + ), General Packet Radio Service ( GPRS), Mobile Station - Serving GPRS Support Node (MS - SGSN) Logical Link Control (LLC) layer specification, GSM , 2000 [3 ] ETSI, Digital cellular telecommunication system (Phase 2 + ), General Packet Radio Service ( GPRS), Service description, Stage1, GSM , 1999 [4 ] ETSI, Digital cellular telecommunication system (Phase 2 + ), General Packet Radio Service ( GPRS), Service description, Stage2, GSM , 2000 [5 ] ETSI, Digital cellular telecommunication system ( Phase 2 + ), General Packet Radio Service ( GPRS), Mobile radio interface sig2 nalling layer 3, GSM , 2000 Analysis and implementation of GTP in GSN WAN G Tian 1, ZHAN G Wei 2 (1. College of computer science and Information Engineering,Chongqing Technology and Business University, Chongqing,400067,China ; 2. College of Management,Chongqing Technology and Businese University,Chongqing ,China) Abstract : In this paper, we give thorough analysis and study on GPRS Tunnelling Protocol( GTP) based on our research and development experience of application products. The transport and signaling function and basic service of GTP are analyzed in detail. Moreover, the configure location and the main framework of hardware and software to im2 plement GTP in SGSN and GGSN are presented. Key words : General Packet Rradio Service, GPRS Tunnelling Protocol, GPRS Support Node :