TREA

Location derived presence information

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Information

  • Patent Grant
  • 8532277
  • Patent Number
    8,532,277
  • Date Filed
    Monday, October 3, 2011
    13 years ago
  • Date Issued
    Tuesday, September 10, 2013
    11 years ago
Information
Abstract
The number of messages required in networks where both location and presence services are deployed may be reduced, by retrieving presence data from messages otherwise intended to provide only location information. Thus, information determined in a location service scheme is utilized to provide a presence service as well. A location server requests mobile subscriber (MS) information from a Core Network (CN) Node (i.e. HLR, MSC, etc.) that can be used in determining the Location of the MS. A single message aggregates retrieval of information for two services, specifically, for both location and presence.
Description
BACKGROUND OF THE INVENTION

1. Field of the Invention


This invention relates generally to wireless communication carriers. More particularly, it relates to location and presence-based services for the wireless industry.


2. Background of Related Art


The term “presence” in the wireless world typically relates to a network answer to the simple question “Are you available?”. For instance, if a subscriber's wireless device is turned off, they would not be available. However, if a subscriber's wireless device is turned on, and in communication with a carrier, the carrier would most likely be able to indicate to a relevant request that the subscriber is available and thus “present”. The functions and use of presence information is well known in the art.


Location information regarding subscribers is increasingly becoming available in a wireless network. This is particularly true in systems that comply with E-9-1-1 requirements. Location information relates to absolute coordinates of a wireless device.


Both Location and Presence services are message intensive on telecom networks. Message reduction in general is desirable, both to allow increased capacity in a wireless network, as well as to improve reliability of the system by reducing the number of messages.


SUMMARY OF THE INVENTION

In accordance with the principles of the present invention, a method and apparatus provides presence information regarding a wireless device. A request for location information regarding a wireless device is received. Presence information regarding the wireless device is provided in response to the receipt of the request for location information regarding the wireless device.





BRIEF DESCRIPTION OF THE DRAWINGS

Features and advantages of the present invention will become apparent to those skilled in the art from the following description with reference to the drawings, in which:



FIG. 1 shows generally a location request.



FIG. 2 shows a LoCation Services (LCS) request generating a presence response, in accordance with the principles of the present invention.





DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

The present invention recognizes the duplicity of information provided by location and presence services, and reduces the number of messages required in networks where both Location and Presence services are deployed.


To reduce the amount of messaging within the core network, the present invention retrieves presence data from messages intended to provide location information. Thus, information determined in a Location service scheme is utilized to provide a presence service as well.


In accordance with the present invention, a Location Server requests mobile subscriber (MS) information from a Core Network (CN) Node (i.e. HLR, MSC, etc.) that can be used in determining the Location of the MS. In most cases the messages used for requesting Location and Presence services are the same. The proposed concept uses a single message to aggregate information for two services, specifically Location and Presence.


Entirely new revenue streams may be realized by carriers through a location services solution, e.g., the Xypoint Location Platform (XLP) available from TeleCommunication Systems, Inc. in Annapolis, Md. The XLP preferably integrates three centers that wireless carriers should have to effectively gather, manage, protect and distribute wireless data, and ultimately, collect revenue from subscribers for doing so. With the ability to offer the full array of location-based services-everything from enhanced 411 services, to location-based games, child tracking and location-specific advertising-carriers can add a whole new profit center to their business models, including generating non-subscriber revenue. The three module centers in the exemplary XLP used in the disclosed embodiments are a Location Center, a Presence Center, and a Privacy Center.


Location Center—Determines the location of mobile users from the wireless network and provides a single point of access for location-based applications. The XLP Location Center preferably includes a mobile positioning center (MPC), e.g., a fully J-STD-036-compliant Mobile Positioning Center (MPC) to deliver E911 Phase I services.


Presence Center—Enhances an application's ability to communicate with the mobile user by determining the state and availability of the mobile user to receive a text message, WAP push or incoming call. Presence enables applications such as instant messaging and allows for options such as determining who on your “buddy list,” is available.


Privacy Center—Ensures that carriers and mobile subscribers are firmly in control of their data. It allows users to choose exactly which location and presence information to make available to specific vendors or other users.


The XLP is preferably implemented as either a fully turnkey (in-house), hosted or hybrid solution, allowing carriers to pick and choose the best solution to meet their business needs. Whether a carrier opts for in-house or hosted services, the XLP provides a highly available and scalable distributed network architecture. The XLP also offers carriers the flexibility to choose the position determining entity (PDE) that will best meet their current needs while also minimizing over-lapping integration of applications and services.


The MPC technology integrated within the XLP's Location Center has been deployed to support E911 Phase I services. The Xypoint Location Platform available from TeleCommunication Systems, Inc. has been integrated with well over 100 commercially available switches-including Lucent, Nortel, Motorola and Ericsson. The XLP is preferably network independent and supports all major wireless interfaces, including GSM, CDMA, TDMA and AMPS.



FIG. 1 shows generally a location request to a core network node containing pertinent location information, resulting not only in a return of location information, but also in the spawning of presence information.


In particular, as shown in FIG. 1, a location server 202 requests location information regarding a particular mobile subscriber (MS) from a core network node 204, e.g., from a Mobile Switch Center (MSC). Requested information regarding a particular wireless device (MS) may include, e.g., attach, detach, and location area update. The location server 202 may also request information regarding the wireless device such as attach, detach and/or location area update from a Packet Date Node (e.g., SGSN, GGSN, or PDSN).


Typically, location information regarding a particular wireless device is requested of a home location register (HLR). In accordance with the principles of the present invention, the home location register can also serve as a basis for presence services. Exemplary presence services may include, e.g., the state and/or status of a subscriber.


Importantly, in accordance with the present invention, information relating to presence is spawned or triggered by a location request. The presence information may or may not be returned along with the location information, but preferably is included within the message (or messages) containing location information.



FIG. 2 shows an exemplary LoCation Services (LCS) request generating a response including presence information in more detail, in accordance with the principles of the present invention.


In particular, FIG. 2 shows exemplary messaging between a presence client 102, a location service client 104, a location/presence server 106, a home location register (HLR) 108, a core network node such as an MSC or packet data node 110, and a radio access network (RAN) 112.


In the exemplary embodiment, the messaging cycle is initiated (shown in Step 1) by a location services client 104, that transmits a location request message to a location services/presence server 106 in the relevant carrier's network.


In step 2, a Provide Subscriber Info message is transmitted by the location services/presence services server 106 to the home location register 108 (or other node containing location and/or presence information). The Provide Subscriber Info message can request location information and/or subscriber state. In this use case, location information regarding a particular subscriber is being requested, and within the same message, presence information such as subscriber state may also be requested. Requested presence information can include, e.g., idle, bust, not reachable, etc.


In step 3, the network node containing the location and presence information (e.g., the Home Location Register (HLR) 108) provides the requested location information and presence information (e.g., idle, bust, not reachable, etc.) back to the location services/presence services server 106.


In step 4, the location services/presence services server 106 uses the returned subscriber info, and transmits a Presence Service Response to a relevant presence application, e.g., a presence client 102 depicted in FIG. 2.


This ‘freebie’ presence information is an important aspect of the present invention. For instance, an entirely separate presence application 102 may register with a particular carrier, perhaps paying suitable fees, for the right to receive presence information for those wireless devices that have had location information returned. This avoids the need for the presence client 102 to separately request presence information regarding that particular wireless device.


In step 5, the location services/presence services server 106 requests updated location information of the wireless network, i.e., sending a request for current location information from a relevant network node (e.g., the MSC or packet data node 110).


The MSC, packet data node 110, etc. may determine a current location of the relevant wireless device using any suitable location technology, e.g., using a global positioning satellite (GPS) system, using triangulation, using angle of arrival, etc.


As part of the determination of a current location of the wireless device, as shown in step 6, the location request may be forwarded to a Radio Access Network. This would be necessary for certain locating technologies (e.g., for triangulation, angle of arrival, etc.). If a global positioning satellite system is utilized, the location request may be forwarded to a suitable GPS application in the wireless network that receives GPS location information regarding a relevant wireless device.


In step 7, a response to the update location information request is transmitted to the location services/presence services server 106. (The updated location information may also be forwarded to the HLR (not shown in FIG. 2) to update the current location of the relevant wireless device).


Lastly, in step 8, the location information initially requested by the LCS application or client 104 is returned. This returned information ideally includes current location information freshly obtained from the MSC 110 or other network node, but may instead be cached location information stored in the HLR 108 if the location information is not returned within a sufficient time window (e.g., causing a timeout).


The present invention provides benefits such as reducing core network messaging traffic, providing better XLP performance, and allowing the use of cached presence data relating to wireless devices, allowing quick and easy access to presence data.


While the invention has been described with reference to the exemplary embodiments thereof, those skilled in the art will be able to make various modifications to the described embodiments of the invention without departing from the true spirit and scope of the invention.

Claims
  • 1. A method of providing presence information regarding a wireless device, comprising: receiving, by a physical home location register, a request for location information regarding a physical wireless device;formulating, at said physical home location register, a data message including presence information regarding said physical wireless device in response to said request for location information; andtriggering transmission of said data message including said presence, in response to said request for location information.
  • 2. The method of providing presence information regarding a wireless device according to claim 1, wherein said presence information comprises at least one of the following: a state of said physical wireless device; anda status of said physical wireless device.
  • 3. The method of providing presence information regarding a wireless device according to claim 1, wherein: said presence information is transmitted to another wireless device other than said physical wireless device.
  • 4. The method of providing presence information regarding a wireless device according to claim 1, wherein: said location information and said presence information are maintained in said physical home location register.
  • 5. The method of providing presence information regarding a wireless device according to claim 1, further comprising: retrieving said location information regarding said physical wireless device from a core network node.
  • 6. The method of providing presence information regarding a wireless device according to claim 5, wherein: said core network node is a message service center.
  • 7. The method of providing presence information regarding a wireless device according to claim 1, further comprising: obtaining last known location information regarding said physical wireless device to provide as requested location information.
  • 8. The method of providing presence information regarding a wireless device according to claim 1, further comprising: obtaining requested location information from cached memory.
  • 9. The method of providing presence information regarding a wireless device according to claim 1, further comprising: obtaining requested location information from a radio access network.
  • 10. The method of providing presence information regarding a wireless device according to claim 1, further comprising: obtaining requested location information from a global positioning satellite (GPS) system.
  • 11. A location services system for providing presence information regarding a wireless device, comprising: a physical home location register to receive a request for location information regarding a physical wireless device, to formulate a data message including presence information regarding said physical wireless device in response to said request for location information, and to transmit said data message including said presence information; anda presence server to transmit said data message including said presence information triggered in response to said request for location information.
  • 12. The location services system for providing presence information regarding a wireless device according to claim 11, wherein said presence information comprises at least one of the following: a state of said physical wireless device; anda status of said physical wireless device.
  • 13. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: said presence information is provided to another wireless device other than said physical wireless device.
  • 14. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: said home location register obtains requested location information from a global positioning satellite (GPS) system.
  • 15. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: said home location server obtains requested location information from a core network node.
  • 16. The location services system for providing presence information regarding a wireless device according to claim 15, wherein: said core network node is a message service center.
  • 17. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: said location server obtains last known location information regarding said physical wireless device to provide as requested location information.
  • 18. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: requested location information is obtained from cached memory.
  • 19. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: requested location information is obtained from a radio access network.
  • 20. The location services system for providing presence information regarding a wireless device according to claim 11, wherein: requested location information is obtained from a global positioning satellite (GPS) system.
Parent Case Info

This application is a continuation of U.S. patent application Ser. No. 12/007,947, entitled “Location Derived Presence Information,” to Hines et al., filed on Jan. 17, 2008, now U.S. Pat. No. 8,032,112; which in turn is a continuation of U.S. patent application Ser. No. 10/395,217, entitled “Location Derived Presence Information,” to Hines et al., filed on Mar. 25, 2003, now U.S. Pat. No. 7,426,380; which claims priority from U.S. Provisional Appl. No. 60/367,708, entitled “Location Derived Presence Information”, filed Mar. 28, 2002, by Hines et al., the entirety of all of which is are explicitly incorporated herein by reference.

US Referenced Citations (629)
Number Name Date Kind
1103073 O'Connell Jul 1914 A
4445118 Taylor et al. Apr 1984 A
4494119 Wimbush Jan 1985 A
4651156 Martinez Mar 1987 A
4706275 Kamil Nov 1987 A
4891638 Davis Jan 1990 A
4891650 Scheffer Jan 1990 A
4952928 Carroll Aug 1990 A
4972484 Theile Nov 1990 A
5014206 Scribner May 1991 A
5043736 Darnell Aug 1991 A
5055851 Scheffer Oct 1991 A
5068656 Sutherland Nov 1991 A
5068891 Marshall Nov 1991 A
5070329 Jasimaki Dec 1991 A
5081667 Drori Jan 1992 A
5119104 Heller Jun 1992 A
5126722 Kamis Jun 1992 A
5144283 Arens Sep 1992 A
5161180 Chavous Nov 1992 A
5166972 Smith Nov 1992 A
5177478 Wagai Jan 1993 A
5193215 Olmer Mar 1993 A
5208756 Song May 1993 A
5214789 George May 1993 A
5218367 Sheffer Jun 1993 A
5223844 Mansell Jun 1993 A
5239570 Koster Aug 1993 A
5265630 Hartmann Nov 1993 A
5266944 Caroll Nov 1993 A
5283570 DeLuca Feb 1994 A
5289527 Tiedemann Feb 1994 A
5293642 Lo Mar 1994 A
5299132 Wortham Mar 1994 A
5301354 Schwendeman Apr 1994 A
5311516 Kuznicke May 1994 A
5325302 Izidon Jun 1994 A
5327529 Fults Jul 1994 A
5334974 Simms Aug 1994 A
5335246 Yokev Aug 1994 A
5343493 Karimulah Aug 1994 A
5347568 Moody Sep 1994 A
5351235 Lahtinen Sep 1994 A
5361212 Class Nov 1994 A
5363425 Mufti Nov 1994 A
5365451 Wang Nov 1994 A
5374936 Feng Dec 1994 A
5379451 Nakagoshi Jan 1995 A
5381338 Wysocki Jan 1995 A
5387993 Heller Feb 1995 A
5388147 Grimes Feb 1995 A
5390339 Bruckery Feb 1995 A
5394158 Chia Feb 1995 A
5396227 Carroll Mar 1995 A
5398190 Wortham Mar 1995 A
5406614 Hara Apr 1995 A
5418537 Bird May 1995 A
5422813 Schuchman Jun 1995 A
5423076 Westergren Jun 1995 A
5432841 Rimer Jul 1995 A
5434789 Fraker Jul 1995 A
5454024 Lebowitz Sep 1995 A
5461390 Hosher Oct 1995 A
5470233 Fruchterman Nov 1995 A
5479408 Will Dec 1995 A
5479482 Grimes Dec 1995 A
5485161 Vaugh Jan 1996 A
5485163 Singer et al. Jan 1996 A
5488563 Chazelle Jan 1996 A
5494091 Freeman Feb 1996 A
5497149 Fast Mar 1996 A
5504491 Chapman Apr 1996 A
5506886 Maine Apr 1996 A
5508931 Snider Apr 1996 A
5513243 Kage Apr 1996 A
5515287 Hakoyama May 1996 A
5517199 DiMattei May 1996 A
5519403 Bickley May 1996 A
5530655 Lokhoff Jun 1996 A
5530914 McPheters Jun 1996 A
5532690 Hertel Jul 1996 A
5535434 Siddoway Jul 1996 A
5539395 Buss Jul 1996 A
5539398 Hall Jul 1996 A
5539829 Lokhoff Jul 1996 A
5543776 L'Esperance Aug 1996 A
5546445 Dennison Aug 1996 A
5552772 Janky Sep 1996 A
5555286 Tendler Sep 1996 A
5568119 Schipper Oct 1996 A
5568153 Beliveau Oct 1996 A
5574648 Pilley Nov 1996 A
5579372 Angstrom Nov 1996 A
5588009 Will Dec 1996 A
5592535 Klotz Jan 1997 A
5594780 Wiedeman Jan 1997 A
5604486 Lauro Feb 1997 A
5606313 Allen Feb 1997 A
5606618 Lokhoff Feb 1997 A
5606850 Nakamura Mar 1997 A
5610815 Gudat Mar 1997 A
5614890 Fox Mar 1997 A
5615116 Gudat Mar 1997 A
5621793 Bednarek Apr 1997 A
5628051 Salin May 1997 A
5629693 Janky May 1997 A
5633912 Tsoi May 1997 A
5636276 Brugger Jun 1997 A
5661652 Sprague Aug 1997 A
5661755 Van de Kerkhof Aug 1997 A
5682600 Salin Oct 1997 A
5689245 Noreen Nov 1997 A
5699053 Jonsson Dec 1997 A
5731785 Lemelson Mar 1998 A
5740534 Ayerst Apr 1998 A
5761618 Lynch Jun 1998 A
5765152 Erickson Jun 1998 A
5767795 Schaphorst Jun 1998 A
5768509 Gunluk Jun 1998 A
5771353 Eggleston Jun 1998 A
5774533 Patel Jun 1998 A
5774670 Montulli Jun 1998 A
5787357 Salin Jul 1998 A
5794142 Vantilla Aug 1998 A
5797094 Houde Aug 1998 A
5797096 Lupien Aug 1998 A
5802492 DeLorrme Sep 1998 A
5806000 Vo Sep 1998 A
5809415 Rossmann Sep 1998 A
5812086 Bertiger Sep 1998 A
5812087 Krasner Sep 1998 A
5822700 Hult Oct 1998 A
5828740 Khue Oct 1998 A
5835907 Newman Nov 1998 A
5841396 Krasner Nov 1998 A
5857201 Wright, Jr. Jan 1999 A
5864667 Barkam Jan 1999 A
5874914 Krasner Feb 1999 A
5896369 Warsta Apr 1999 A
5920821 Seaholtz Jul 1999 A
5922074 Richard Jul 1999 A
5930250 Klok Jul 1999 A
5953398 Hill Sep 1999 A
5960362 Grob Sep 1999 A
5974054 Couts Oct 1999 A
5978685 Laiho Nov 1999 A
5983099 Yao Nov 1999 A
5987323 Houtari Nov 1999 A
5998111 Abe Dec 1999 A
5999124 Sheynblat Dec 1999 A
6014602 Kithil Jan 2000 A
6032051 Hall Feb 2000 A
6035025 Hanson Mar 2000 A
6049710 Nilsson Apr 2000 A
6052081 Krasner Apr 2000 A
6058300 Hanson May 2000 A
6058338 Agashe et al. May 2000 A
6061018 Sheynblat May 2000 A
6061346 Nordman May 2000 A
6064336 Krasner May 2000 A
6064875 Morgan May 2000 A
6067045 Castelloe May 2000 A
6070067 Nguyen May 2000 A
6075982 Donovan Jun 2000 A
6081229 Soliman Jun 2000 A
6081508 West Jun 2000 A
6085320 Kaliski, Jr. Jul 2000 A
6101378 Barabush Aug 2000 A
6104931 Havinis et al. Aug 2000 A
6108533 Brohoff Aug 2000 A
6122503 Daly Sep 2000 A
6122520 Want Sep 2000 A
6124810 Segal Sep 2000 A
6131067 Girerd Oct 2000 A
6133874 Krasner Oct 2000 A
6134483 Vayanos Oct 2000 A
6138003 Kingdon et al. Oct 2000 A
6148197 Bridges Nov 2000 A
6148198 Anderson Nov 2000 A
6149353 Nilsson Nov 2000 A
6150980 Krasner Nov 2000 A
6154172 Piccionelli Nov 2000 A
6169891 Gorham Jan 2001 B1
6169901 Boucher Jan 2001 B1
6169902 Kawamoto Jan 2001 B1
6173181 Losh Jan 2001 B1
6178505 Schneider Jan 2001 B1
6178506 Quick, Jr. Jan 2001 B1
6181935 Gossman Jan 2001 B1
6181939 Ahvenainen Jan 2001 B1
6185427 Krasner et al. Feb 2001 B1
6188354 Soliman Feb 2001 B1
6188752 Lesley Feb 2001 B1
6188909 Alanara Feb 2001 B1
6189098 Kaliski, Jr. Feb 2001 B1
6195557 Havinis Feb 2001 B1
6198431 Gibson Mar 2001 B1
6199045 Giniger Mar 2001 B1
6199113 Alegre Mar 2001 B1
6205330 Windbladh Mar 2001 B1
6208290 Krasner Mar 2001 B1
6208854 Roberts Mar 2001 B1
6215441 Moeglein Apr 2001 B1
6219557 Havinis Apr 2001 B1
6223046 Hamill-Keays Apr 2001 B1
6226529 Bruno May 2001 B1
6239742 Krasner May 2001 B1
6247135 Feaugue Jun 2001 B1
6249680 Wax Jun 2001 B1
6249744 Morita Jun 2001 B1
6249873 Richard Jun 2001 B1
6253074 Carlsson Jun 2001 B1
6253203 O'Flaherty Jun 2001 B1
6260147 Quick, Jr. Jul 2001 B1
6266614 Alumbaugh Jul 2001 B1
6275692 Skog Aug 2001 B1
6275849 Ludwig Aug 2001 B1
6278701 Ayyagari Aug 2001 B1
6289373 Dezonno Sep 2001 B1
6297768 Allen, Jr. Oct 2001 B1
6307504 Sheynblat Oct 2001 B1
6308269 Proidl Oct 2001 B2
6313786 Sheynblat Nov 2001 B1
6317594 Gossman Nov 2001 B1
6321091 Holland Nov 2001 B1
6321092 Fitch Nov 2001 B1
6321257 Kotala Nov 2001 B1
6324524 Lent Nov 2001 B1
6327473 Soliman Dec 2001 B1
6327479 Mikkola Dec 2001 B1
6333919 Gaffney Dec 2001 B2
6360093 Ross Mar 2002 B1
6360102 Havinis Mar 2002 B1
6363254 Jones Mar 2002 B1
6367019 Ansell Apr 2002 B1
6370389 Isomursu Apr 2002 B1
6377209 Krasner Apr 2002 B1
6377810 Geiger et al. Apr 2002 B1
6400314 Krasner Jun 2002 B1
6400958 Isomursu Jun 2002 B1
6411254 Moeglein Jun 2002 B1
6421002 Krasner Jul 2002 B2
6427001 Contractor Jul 2002 B1
6433734 Krasner Aug 2002 B1
6434381 Moore Aug 2002 B1
6442391 Johansson Aug 2002 B1
6449473 Raivisto Sep 2002 B1
6449476 Hutchison, IV Sep 2002 B1
6456852 Bar Sep 2002 B2
6463272 Wallace Oct 2002 B1
6477150 Maggenti Nov 2002 B1
6504491 Christians Jan 2003 B1
6505049 Dorenbosch Jan 2003 B1
6510387 Fuchs Jan 2003 B2
6512922 Burg Jan 2003 B1
6512930 Sandegren Jan 2003 B2
6515623 Johnson Feb 2003 B2
6519466 Pande Feb 2003 B2
6522682 Kohli Feb 2003 B1
6529500 Pandharipande Mar 2003 B1
6529829 Turetzky Mar 2003 B2
6531982 White Mar 2003 B1
6538757 Sansone Mar 2003 B1
6539200 Schiff Mar 2003 B1
6539232 Hendrey et al. Mar 2003 B2
6539304 Chansarkar Mar 2003 B1
6542464 Takeda Apr 2003 B1
6542734 Abrol Apr 2003 B1
6542743 Soliman Apr 2003 B1
6549776 Joong Apr 2003 B1
6549844 Egberts Apr 2003 B1
6553236 Dunko et al. Apr 2003 B1
6556832 Soliman Apr 2003 B1
6560461 Fomukong May 2003 B1
6560534 Abraham May 2003 B2
6570530 Gaal May 2003 B2
6571095 Koodli May 2003 B1
6574558 Kohli Jun 2003 B2
6580390 Hay Jun 2003 B1
6584552 Kuno Jun 2003 B1
6587691 Granstam Jul 2003 B1
6594500 Bender Jul 2003 B2
6597311 Sheynblat Jul 2003 B2
6600927 Hamilton Jul 2003 B2
6603973 Foladare Aug 2003 B1
6606495 Korpi Aug 2003 B1
6606554 Edge Aug 2003 B2
6609004 Morse Aug 2003 B1
6611757 Brodie Aug 2003 B2
6618593 Drutman et al. Sep 2003 B1
6618670 Chansarkar Sep 2003 B1
6621452 Knockeart Sep 2003 B2
6621810 Leung Sep 2003 B1
6628233 Knockeart Sep 2003 B2
6633255 Krasner Oct 2003 B2
6640184 Rabe Oct 2003 B1
6650288 Pitt Nov 2003 B1
6661372 Girerd Dec 2003 B1
6665539 Sih Dec 2003 B2
6665541 Krasner Dec 2003 B1
6671620 Garin Dec 2003 B1
6677894 Sheynblat Jan 2004 B2
6680694 Knockheart Jan 2004 B1
6691019 Seeley Feb 2004 B2
6694258 Johnson Feb 2004 B2
6694351 Shaffer Feb 2004 B1
6697629 Grilli Feb 2004 B1
6698195 Hellinger Mar 2004 B1
6701144 Kirbas Mar 2004 B2
6703971 Pande Mar 2004 B2
6703972 Van Diggelen Mar 2004 B2
6704651 Van Diggelen Mar 2004 B2
6707421 Drury Mar 2004 B1
6714793 Carey Mar 2004 B1
6718174 Vayanos Apr 2004 B2
6720915 Sheynblat Apr 2004 B2
6721578 Minear Apr 2004 B2
6721871 Piispanen Apr 2004 B2
6724342 Bloebaum Apr 2004 B2
6725159 Krasner Apr 2004 B2
6728701 Stoica Apr 2004 B1
6731940 Nagendran May 2004 B1
6734821 Van Diggelen May 2004 B2
6738013 Orler May 2004 B2
6738800 Aquilon May 2004 B1
6741842 Goldberg May 2004 B2
6744856 Karnik Jun 2004 B2
6744858 Ryan Jun 2004 B1
6745038 Callaway, Jr. Jun 2004 B2
6747596 Orler Jun 2004 B2
6748195 Phillips Jun 2004 B1
6751464 Burg Jun 2004 B1
6756938 Zhao Jun 2004 B2
6757544 Rangarajan Jun 2004 B2
6757545 Nowak et al. Jun 2004 B2
6771742 McCalmont Aug 2004 B2
6772340 Peinado Aug 2004 B1
6775255 Roy Aug 2004 B1
6775534 Lindgren Aug 2004 B2
6775655 Peinado Aug 2004 B1
6775802 Gaal Aug 2004 B2
6778136 Gronemeyer Aug 2004 B2
6778885 Agashe Aug 2004 B2
6781963 Crockett Aug 2004 B2
6788249 Farmer Sep 2004 B1
6795699 McCraw Sep 2004 B1
6799049 Zellner Sep 2004 B1
6799050 Krasner Sep 2004 B1
6801159 Swope Oct 2004 B2
6804524 Vandermaijden Oct 2004 B1
6807534 Erickson Oct 2004 B1
6810323 Bullock Oct 2004 B1
6813264 Vassilovski Nov 2004 B2
6813560 Van Diggelen Nov 2004 B2
6816111 Krasner Nov 2004 B2
6816710 Krasner Nov 2004 B2
6816719 Heinonen Nov 2004 B1
6816734 Wong Nov 2004 B2
6820069 Kogan Nov 2004 B1
6829475 Lee Dec 2004 B1
6832373 O'Neill Dec 2004 B2
6839020 Geier Jan 2005 B2
6839021 Sheynblat Jan 2005 B2
6839417 Weisman Jan 2005 B2
6842715 Gaal Jan 2005 B1
6847618 Laursen Jan 2005 B2
6847822 Dennison Jan 2005 B1
6853916 Fuchs Feb 2005 B2
6856282 Mauro Feb 2005 B2
6861980 Rowitch Mar 2005 B1
6865171 Nilsson Mar 2005 B1
6865395 Riley Mar 2005 B2
6867733 Sandhu Mar 2005 B2
6867734 Voor Mar 2005 B2
6873854 Crockett Mar 2005 B2
6876734 Summers Apr 2005 B1
6882850 McConnell et al. Apr 2005 B2
6885874 Grube et al. Apr 2005 B2
6885940 Brodie Apr 2005 B2
6888497 King May 2005 B2
6888932 Snip May 2005 B2
6895238 Newell May 2005 B2
6895249 Gaal May 2005 B2
6900758 Mann May 2005 B1
6903684 Simic Jun 2005 B1
6904029 Fors Jun 2005 B2
6907224 Younis Jun 2005 B2
6907238 Leung Jun 2005 B2
6912230 Salkini Jun 2005 B1
6912395 Benes Jun 2005 B2
6912545 Lundy Jun 2005 B1
6915208 Garin Jul 2005 B2
6917331 Gronemeyer Jul 2005 B2
6930634 Peng Aug 2005 B2
6937187 Van Diggelen Aug 2005 B2
6937872 Krasner Aug 2005 B2
6940826 Simard Sep 2005 B1
6940950 Dickinson Sep 2005 B2
6941144 Stein Sep 2005 B2
6944540 King Sep 2005 B2
6947772 Minear Sep 2005 B2
6950058 Davis Sep 2005 B1
6957068 Hutchison Oct 2005 B2
6957073 Bye Oct 2005 B2
6961562 Ross Nov 2005 B2
6963557 Knox Nov 2005 B2
6965754 King Nov 2005 B2
6965767 Maggenti Nov 2005 B2
6968044 Beason Nov 2005 B2
6970917 Kushwaha Nov 2005 B1
6973320 Brown Dec 2005 B2
6975266 Abraham Dec 2005 B2
6978453 Rao Dec 2005 B2
6980816 Rohles Dec 2005 B2
6985747 Chithambaram Jan 2006 B2
6993355 Pershan Jan 2006 B1
6996720 DeMello Feb 2006 B1
6999782 Shaughnessy Feb 2006 B2
7024321 Deninger Apr 2006 B1
7024393 Peinado Apr 2006 B1
7047411 DeMello May 2006 B1
7065351 Carter Jun 2006 B2
7065507 Mohammed Jun 2006 B2
7072667 Olrik Jul 2006 B2
7079857 Maggenti Jul 2006 B2
7103018 Hansen Sep 2006 B1
7103574 Peinado Sep 2006 B1
7106717 Rosseau Sep 2006 B2
7110773 Wallace Sep 2006 B1
7130630 Enzmann Oct 2006 B1
7136466 Gao Nov 2006 B1
7136838 Peinado Nov 2006 B1
7151946 Maggenti Dec 2006 B2
7174153 Ehlers Feb 2007 B2
7177397 McCalmont Feb 2007 B2
7177398 Meer Feb 2007 B2
7177399 Dawson Feb 2007 B2
7209758 Moll Apr 2007 B1
7209969 Lahti Apr 2007 B2
7218940 Niemenna May 2007 B2
7221959 Lindquist May 2007 B2
7245900 Lamb Jul 2007 B1
7246187 Ezra Jul 2007 B1
7260186 Zhu Aug 2007 B2
7260384 Bales et al. Aug 2007 B2
7269428 Wallenius Sep 2007 B1
7321773 Hines Jan 2008 B2
7330899 Wong Feb 2008 B2
7333480 Clarke Feb 2008 B1
7369530 Keagy May 2008 B2
7382773 Schoeneberger Jun 2008 B2
7394896 Norton Jul 2008 B2
7424293 Zhu Sep 2008 B2
7426380 Hines Sep 2008 B2
7428571 Ichimura Sep 2008 B2
7436785 McMullen Oct 2008 B1
7440442 Grabelsky et al. Oct 2008 B2
7450951 Vimpari Nov 2008 B2
7453990 Welenson Nov 2008 B2
7495608 Chen Feb 2009 B1
7573982 Breen Aug 2009 B2
7623447 Faccin Nov 2009 B1
7747258 Farmer Jun 2010 B2
7751826 Gardner Jul 2010 B2
7787611 Kotelly Aug 2010 B1
7881233 Bieselin Feb 2011 B2
7937067 Maier May 2011 B2
8005683 Tessesl Aug 2011 B2
8027658 Suryanarayana Sep 2011 B2
8060389 Johnson Nov 2011 B2
20010011247 O'Flaherty Aug 2001 A1
20020037735 Maggenti Mar 2002 A1
20020052214 Maggenti May 2002 A1
20020061760 Maggenti May 2002 A1
20020069529 Wieres Jun 2002 A1
20020077083 Zellner Jun 2002 A1
20020077084 Zellner Jun 2002 A1
20020077118 Zellner Jun 2002 A1
20020077897 Zellner Jun 2002 A1
20020085538 Leung Jul 2002 A1
20020086676 Hendry Jul 2002 A1
20020098832 Fleischer et al. Jul 2002 A1
20020102996 Jenkins Aug 2002 A1
20020102999 Maggenti Aug 2002 A1
20020111172 DeWolf Aug 2002 A1
20020112047 Kushwaha Aug 2002 A1
20020118650 Jagadeesan Aug 2002 A1
20020123327 Vataja Sep 2002 A1
20020126656 Park Sep 2002 A1
20020138650 Yamamoto et al. Sep 2002 A1
20020158777 Flick Oct 2002 A1
20020173317 Nykanen Nov 2002 A1
20020191595 Mar Dec 2002 A1
20030009277 Fan Jan 2003 A1
20030009602 Jacobs Jan 2003 A1
20030012148 Peters Jan 2003 A1
20030013449 Hose Jan 2003 A1
20030016804 Sheha Jan 2003 A1
20030026245 Ejzak Feb 2003 A1
20030037163 Kitada Feb 2003 A1
20030040272 Lelievre Feb 2003 A1
20030044654 Holt Mar 2003 A1
20030065788 Salomaki Apr 2003 A1
20030072318 Lam Apr 2003 A1
20030078064 Chan Apr 2003 A1
20030081557 Mettala May 2003 A1
20030086539 McCalmont May 2003 A1
20030101329 Lahti May 2003 A1
20030101341 Kettler May 2003 A1
20030103484 Oommen Jun 2003 A1
20030108176 Kung Jun 2003 A1
20030109245 McCalmont Jun 2003 A1
20030114157 Spitz Jun 2003 A1
20030118160 Holt et al. Jun 2003 A1
20030119521 Tipnis Jun 2003 A1
20030119528 Pew Jun 2003 A1
20030137961 Tsirtsis Jul 2003 A1
20030153340 Crockett Aug 2003 A1
20030153341 Crockett Aug 2003 A1
20030153342 Crockett Aug 2003 A1
20030153343 Crockett Aug 2003 A1
20030161298 Bergman Aug 2003 A1
20030186709 Rhodes Oct 2003 A1
20030196105 Fineburg Oct 2003 A1
20030204640 Sahineja Oct 2003 A1
20030223381 Schroderus Dec 2003 A1
20040002326 Maher Jan 2004 A1
20040032485 Stephens Feb 2004 A1
20040044623 Wake Mar 2004 A1
20040047461 Weisman et al. Mar 2004 A1
20040068724 Gardner Apr 2004 A1
20040076277 Kuusinen Apr 2004 A1
20040078694 Lester Apr 2004 A1
20040097243 Zellner May 2004 A1
20040098497 Banet May 2004 A1
20040132465 Mattila Jul 2004 A1
20040181689 Kiyoto Sep 2004 A1
20040184584 McCalmont Sep 2004 A1
20040185875 Diacakis et al. Sep 2004 A1
20040190497 Knox Sep 2004 A1
20040192271 Eisner Sep 2004 A1
20040198332 Lundsgaard Oct 2004 A1
20040198386 Dupray Oct 2004 A1
20040205151 Sprigg Oct 2004 A1
20040229632 Flynn Nov 2004 A1
20040242238 Wang Dec 2004 A1
20050028034 Gantman Feb 2005 A1
20050039178 Marolia Feb 2005 A1
20050041578 Huotari Feb 2005 A1
20050043037 Loppe Feb 2005 A1
20050053209 D'Evelyn Mar 2005 A1
20050074107 Renner Apr 2005 A1
20050078612 Lang Apr 2005 A1
20050083911 Grabelsky Apr 2005 A1
20050086467 Asokan Apr 2005 A1
20050090236 Schwinke Apr 2005 A1
20050101335 Kelly May 2005 A1
20050107673 Ball May 2005 A1
20050112030 Gaus May 2005 A1
20050119012 Merheb Jun 2005 A1
20050134504 Harwood Jun 2005 A1
20050135569 Dickinson Jun 2005 A1
20050136885 Kaltsukis Jun 2005 A1
20050169248 Truesdale Aug 2005 A1
20050201529 Nelson Sep 2005 A1
20050209995 Aksu Sep 2005 A1
20050213716 Zhu Sep 2005 A1
20050232252 Hoover Oct 2005 A1
20050238156 Turner Oct 2005 A1
20050255857 Kim Nov 2005 A1
20050259675 Tuohino Nov 2005 A1
20050265318 Khartabil Dec 2005 A1
20050271029 Iffland Dec 2005 A1
20050282518 D'Evelyn Dec 2005 A1
20050287979 Rollender Dec 2005 A1
20050289097 Trossen Dec 2005 A1
20060008065 Longman et al. Jan 2006 A1
20060010200 Mousseau Jan 2006 A1
20060023747 Koren et al. Feb 2006 A1
20060026288 Acharya Feb 2006 A1
20060053225 Poikselka Mar 2006 A1
20060068753 Karpen Mar 2006 A1
20060077911 Shaffer Apr 2006 A1
20060078094 Breen Apr 2006 A1
20060088152 Green Apr 2006 A1
20060104306 Adamczkk May 2006 A1
20060120517 Moon Jun 2006 A1
20060135177 Winterbottom Jun 2006 A1
20060188083 Breen Aug 2006 A1
20060193447 Schwartz Aug 2006 A1
20060212558 Sahinoja Sep 2006 A1
20060212562 Kushwaha Sep 2006 A1
20060234639 Kushwaha Oct 2006 A1
20060234698 Fok Oct 2006 A1
20060239205 Warren Oct 2006 A1
20060250987 White Nov 2006 A1
20060258380 Liebowitz Nov 2006 A1
20060293024 Benco Dec 2006 A1
20060293066 Edge Dec 2006 A1
20070003024 Olivier Jan 2007 A1
20070019614 Hoffman Jan 2007 A1
20070022011 Altberg Jan 2007 A1
20070026854 Nath Feb 2007 A1
20070026871 Wager Feb 2007 A1
20070027997 Polk Feb 2007 A1
20070030539 Nath Feb 2007 A1
20070036139 Patel Feb 2007 A1
20070041513 Gende Feb 2007 A1
20070049288 Lamprecht Mar 2007 A1
20070060097 Edge Mar 2007 A1
20070081635 Croak Apr 2007 A1
20070115941 Patel May 2007 A1
20070121601 Kikinis May 2007 A1
20070149213 Lamba Jun 2007 A1
20070160036 Smith Jul 2007 A1
20070162228 Mitchell Jul 2007 A1
20070201623 Hines Aug 2007 A1
20070242660 Xu Oct 2007 A1
20070263610 Mitchell Nov 2007 A1
20080032703 Krumm Feb 2008 A1
20080037715 Prozeniuk Feb 2008 A1
20080063153 Krivorot Mar 2008 A1
20080065775 Polk Mar 2008 A1
20080186164 Emigh Aug 2008 A1
20080214202 Toomey Sep 2008 A1
20110113060 Martini May 2011 A1
20110273568 Lagassey Nov 2011 A1
20120001750 Monroe Jan 2012 A1
20120189107 Dickinson Jul 2012 A1
Foreign Referenced Citations (5)
Number Date Country
WO9921380 Apr 1999 WO
WO0040038 Jul 2000 WO
WO02057869 Jul 2002 WO
WO2005051033 Jun 2005 WO
WO2007027166 Mar 2007 WO
Non-Patent Literature Citations (5)
Entry
International Search Report received in PCT/US2011/001990 dated Apr. 24, 2012.
International Search Report in PCT/US007/23243 dated Apr. 2, 2008.
Le-Pond Chin, Jyh-Hong Wen, Ting-Way Liu, The Study of the Interconnection of GSM Mobile Communication System Over IP based Network, May 6, 2001, IEEE, Vehicular Technology Conference, vol. 3, pp. 2219-2223.
Location Based Services V2 Roaming Support (non proprietary), 80-V8470-2NP A, dated Jan. 27, 2005, pp. 1-56.
Yilin Ahao, Efficient and reliable date transmission for cellular and GPS based mayday systems, Nov. 1997, IEEE, IEEE Conference on Intelligent Transportation System, 1997. ITSC 97, 555-559.
Related Publications (1)
Number Date Country
20120028651 A1 Feb 2012 US
Provisional Applications (1)
Number Date Country
60367708 Mar 2002 US
Continuations (2)
Number Date Country
Parent 12007947 Jan 2008 US
Child 13200821 US
Parent 10395217 Mar 2003 US
Child 12007947 US