USOO6167271A United States Patent 19 11 Patent Number: 6,167,271 Parker et al. (45) Date of Patent: Dec. 26, 2000 54 INTERFACE BETWEEN CELLULAR AND GSM Technical Specification, Digital cellular telecommu WIRED NETWORKS WITH ENHANCED nications system (Phase 2+); Mobile radio interface layer 3 SUBSCRIBER MOBILITY specification (GSM 04.08), Jul. 1996, Version 5.3.0, pp. 1-513. 75 Inventors: Jerry Joe Parker, Richardson, Tex.; John O'Connell, L'eteng la Ville, Prof. Dr. P. Leuthold, Expert opinion pertaining to France; Stewart Hodde Maxwell, US-patent application Ser. No. 513506, ETH Zurich, Sep. Dallas, TeX. 1991. 73 Assignee: Northern Telecom Limited, Monteal, Ing. Albert Peitz, Telecommunication, Directions toward Canada Universal Applications, 2.issue, Nov. 1992. 21 Appl. No.: 08/851,517 John Scourias, Overview of the Global System for Mobile 22 Filed: May 5, 1997 Communications, May 24, 1995. (51) Int. Cl. ................................................. H04B 1/38 52 U.S. Cl. .......................... 455/445; 455/74.1; 455/560 Primary Examiner Edward Urban 58 Field of Search ..................................... 455/560, 561, ASSistant Examiner Tilahun Gesesse 455/554, 555, 507,422, 74, 74.1, 445 Attorney, Agent, or Firm-Hanyes and Boone, LLP 56) References Cited 57 ABSTRACT U.S. PATENT DOCUMENTS A System to enable communication between a base Station 4,922,517 5/1990 West, Jr. et al. ........................ 455/557 controller (24) within a cellular network (12), and a wired 5,157,660 10/1992 Kuwahara et al. ..................... 370/110 telephone system (38, 39) in a wired subscriber loop (113), 5,412,760 5/1995 Peitz. wherein the base Station controller (24) is responsive to, and 5,440,613 8/1995 Fuentes ................................... 455/445 5,528,665 6/1996 Peitz. generates, cellular network Signaling, and the wired tele 5,590,175 12/1996 Gallant et al. ............................ 379/58 phone System is responsive to, and generates, wired signals. 5,673,268 9/1997 Sharma et al..... ... 455/557 The System includes: a protocol processor (121) receptive to 5,734,699 3/1998 Lu et al. ................................... 379/58 the wired signals, for generating processed signals, and a 5,799.252 8/1998 Nalagoshi et al. ... 455/561 terminal adapter controller (34) conductively coupled both 5,802.467 9/1998 Salazar et al. ... ... 455/419 to the base station controller (24) and to the protocol 5,953,651 9/1999 Lu et al. ................................. 455/560 processor (121), receptive to the processed signals, for FOREIGN PATENT DOCUMENTS generating cellular network Signaling. In another feature of 0.546 467 6/1993 European Pat. Off.. the invention, the cellular network signaling is GSM Sig O 630 166 12/1994 European Pat. Off.. naling. In another feature of the invention, the System also WO95/14360 5/1995 WIPO. includes a voice Service module (123) conductively coupled WO 97/21313 6/1997 WIPO. to the protocol processor, for compressing voice data to WO 97/24004 7/1997 WIPO. Standard cellular compression. In another feature of the OTHER PUBLICATIONS invention, the system also includes means (150) for con GSM Technical Specification, Digital cellular telecommu Verting mobility events in the wired telephone System to nications system (Phase 2+); Specification of the Subscriber cellular network Signaling. Identity Module-Mobile Equipment (SIM-ME) inter face; (GSM 11.1) ETSI, Jul. 1996, Version 5.3.0, pp. 1-111. 30 Claims, 10 Drawing Sheets 39 ANALOG SET ISDN SET 36 ANALOG TO 123 ISDN ADAPTER 34 120 Y. SERVICE MODULE 37 GSM WIRED S/T BUS Z TERMINAL (NERFACE NTERFACE ADAPTER 113 142 CONTROLLER PROTOCOL PROCESSOR 146 140 Sl 150 SIM INTEFACE ACTIWAFE & 148b SM SWITCH SWITCHED 125. Sl NTERFACE GSM WIRED TERMINAL ADAPTER U.S. Patent Dec. 26, 2000 Sheet 1 of 10 6,167,271 LEC SWITCHING EQUIPMENT GSM RL3 CC GSM RL3 MM GSM RL3 RR LAYER 2: T1.602 (Q.921) LAYER 1: T1601 FIC 4 U.S. Patent Dec. 26, 2000 Sheet 2 of 10 6,167,271 GSM WIRED TERMINAL ADAPTER CONTROLLER 34 LL A-BIS INTERFACE MODULE L SWITCHING MODULE L M TA CONTROLLER OPERATION AND APPLICATION MAINTENANCE TERMINAL FIC. 2 U.S. Patent Dec. 26, 2000 Sheet 4 of 10 6,167,271 301 TERMINAL ADAPTER POWERED ON 3.02O WAT FOR SIM <> APPEARANCE AT 303 SWITCHED SIM INTERFACE SIM APPEARS AT 304 SWITCHED SIM INTERFACE 305 SEND RR CHANNEL REQUEST TO TAC 306 RR CHANNEL ASSIGNMENT RECEIVED FROM TAC 307 SEND MM LOCATION UPDATE TO TAC RR LAPD UA MESSAGE 308 RECEIVED FROM TAC MM AUTHENTCATION RR CHANNEL RELEASE 309 REQUEST RECEIVED FROM TAC RECEIVED FROM TAC CALCULATE 310 AUTHENTICATION RESPONSE LOC UPDATE SENT FOR ALL SIM'S2 SEND MM AUTHENTICATION 311 RESPONSE TO TAC MM LOCATION UPDATE WAIT FOR CALL ORIGINATION, 312 ACCEPTED RECEIVED FROM TAC CALL TERMINATION, SWITCHED SN DEATORSoNER off 315 FIC 6 U.S. Patent Dec. 26, 2000 Sheet 5 of 10 6,167,271 401 POWER SWITCH TO OFF POSITION 402 SEND RR CHANNEL REQUEST TO TAC 405 RR CHANNEL ASSIGNMENT RECEIVED 404 SEND MM DETACH MESSAGE TO TAC 405 RR LAPD UA MESSAGE RECEIVED FROM TAC 406 MM AUTHENTCATION REQUEST RECEIVED FROM TAC CALCULATE 407 AUTHENTICATION RESPONSE SEND MM AUTHENTICATION 408 RESPONSE TO TAC MM DETACH ACKNOWLEDGMENT 409 RECEIVED FROM TAC RR CHANNEL RELEASE 410 RECEIVED FROM TAC DETACH SENT FOR ALL SM'S? 411 YES FIC.. 6 U.S. Patent Dec. 26, 2000 Sheet 6 of 10 6,167,271 450-N Q.931 SETUP MESSAGE RECEIVED FROM ISDN SET FIC 7OL 451 3d PROVIDE AUDIBLE 452 4 53 YES TREATMENT TO ISDN SET NUMBER YES IN Q.931 SETUP p NO START INTERDIGIT TIMER 454 455 ANY 6GITSN SETUR)-NO PROVIDE DAL TONE TO ISDN SET; WAIT FOR DIGITN 457 WAT FOR DIGIT DIGIT RECEIVED 459 DIGIT RECEIVED STOP DAL TONE TO ISDN SET 460 STOP INTERDIGIT TIMER DIGIT RECEIVED IS TO NUMBER2 FG.G. 7b 462 NO START INTERDIGIT TIMER; 463 WAIT FOR DIGIT INTERDIGIT TIMER 464 DIGIT RECEIVED EXPRES 466 465 STOP INTERDIGIT TIMER PROVIDE AUDIBLE TREATMENT TO ISDN SET 467 U.S. Patent Dec. 26, 2000 Sheet 7 of 10 6,167,271 FROM FIG. 70 468 SEND RR CHANNEL REQUEST TO TAC FIC. 7b 469 RR CHANNEL ASSGNMENT RECEIVED 470-N SEND CM SERVICE REQUEST MESSAGE TO TAC 471 RR LAPD UA MESSAGE RECEIVED FROM TAC 472 MM AUTHENTICATION REQUEST RECEIVED FROM TAC CALCULATE 473 AUTHENTICATIONT RESPONSE SEND Q.931 CALL PROCEEDING L-477 MESSAGE TO ISDN SET SEND MM AUTHENTICATION 474 RESPONSE TO TAC CC ALERTING MESSAGE 478 RECEIVED FROM TAC SEND CC SETUP 475 MESSAGE TO TAC SEND Q.931 ALERTING 479 MESSAGE TO ISDN SET CC CALL PROCEEOINC 476 RECEIVED FROM TAC CC CONNECT MESSAGE RECEIVED FROM TAC 480 SEND Q.931 CONNECT MESSAGE TO ISDN SET 481 Q.931 CONNECT ACK MESSAGE RECEIVED FROM ISDN SET 482 SEND CC CONNECT ACK MESSAGE TO TAC 483 WAIT FOR DISCONNECT 484 U.S. Patent Dec. 26, 2000 Sheet 8 of 10 6,167,271 501 WAIT FOR PAGING REQUEST FIG. BOL 502 RR PAGING REQUEST RECEIVED FROM TAC 503 IS PAGED SIM INSERTED? YES 504 SEND RR CHANNEL REQUEST TO TAC 505 RR CHANNEL ASSIGNMENT RECEIVED FROM TAC 506 SEND RR PACING RESPONSE TO TAC RR LAPD UA MESSAGE 507 RECEIVED FROM TAC MM AUTHENTICATION 508-1 REQUEST RECEIVED FROM TAC CALCULATE 509 AUTHENTICATION RESPONSE SEND CC CALL 512 SEND MM AUTHENTCATION CONFIRMED TO TAC 510 RESPONSE TO TAC SEND Q.931 SETUP CC SETUP MESSAGE MESSAGE TO SON SET 513 511 RECEIVED FROM TAC Q.931 CALL PROCEEDING MESSAGE RECEIVED FROM ISDN SET 514 TO FIG. 8b U.S. Patent Dec. 26, 2000 Sheet 9 of 10 6,167,271 SWITCHED SIM DEACTIVATED 550 SEND RR CHANNEL 551 REQUEST TO TAC RR CHANNEL ASSIGNMENT 552 RECEIVED 515 Q.931 ALERTNG MESSAGE RECEIVED FROM ISDN SET SEND MM DETACH 553 MESSAGE TO TAC 516 SEND CC ALERTING MESSAGE TO TAC RR LAPD UA MESSAGE 554 RECEIVED FROM TAC 517 Q.931 CONNECT MESSAGE RECEIVED FROM ISDN SET MM AUTHENTICATION REQUEST RECEIVED FROM TAC 555 SEND CC CONNECT 518 MESSAGE TO TAC CALCULATE AUTHENTICATION RESPONSE 556 CC CONNECT ACKNOWLEDGMENT 519 RECEIVED FROM TAC SEND MM AUTHENTICATION RESPONSE TO TAC 557 SEND Q.931 CONNECT ACK 520 MESSAGE TO ISDN SET MM DETACH ACKNOWLEDGMENT RECEIVED FROM TAC 558 521 WAIT FOR DISCONNECT RR CHANNEL RELEASE FIC. 8b. RECEIVED FROM TAC 559 WAT FOR SWITCHED SIM ACTIVATION 560 FIC. 9 6,167,271 1 2 INTERFACE BETWEEN CELLULAR AND The invention achieves another technical advantage in WIRED NETWORKS WITH ENHANCED that it uses existing local loop with Services provided by an SUBSCRIBER MOBILITY existing MSC, So that an operator has to add neither wireline Switching capabilities, nor use cellular radio frequency TECHNICAL FIELD transmission spectrum for local loop Service. The invention relates generally to cellular communication The invention achieves another technical advantage in networks and, more particularly, to wired access to a cellular that it provides standard interfaces for analog and ISDN BRI network. telephone sets, So that SubscriberS may use their existing telephone Sets. BACKGROUND OF THE INVENTION The invention achieves another technical advantage in AS cellular telephone Service has increased, a need has that it complies with the A-bis interface from a base trans arisen for a Single telephony System that can Service a ceiver Station to a base Station controller, So that there is no Subscriber both at his home, that is, fixed-base, or Stationary, change required in the construction or operation of 1) the and when he is away from home, or mobile. 15 base Station controller, and 2) a mobile Services Switching U.S. Pat. Nos. 5,412,760 and 5,528,665, issued to Peitz, Center.