AU2002356895A1 - System and method for routing voice over IP calls - Google Patents
System and method for routing voice over IP callsInfo
- Publication number
- AU2002356895A1 AU2002356895A1 AU2002356895A AU2002356895A AU2002356895A1 AU 2002356895 A1 AU2002356895 A1 AU 2002356895A1 AU 2002356895 A AU2002356895 A AU 2002356895A AU 2002356895 A AU2002356895 A AU 2002356895A AU 2002356895 A1 AU2002356895 A1 AU 2002356895A1
- Authority
- AU
- Australia
- Prior art keywords
- destination device
- call
- circuit
- originating
- switched
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Description
SYSTEM AND METHOD FOR ROUTING VOICE OVER IP CALLS
2. Field of the Invention
[0001] The present invention relates generally to providing quality of service assurance over non-wireless portions of a wireless voice over Internet Protocols (VOIP) system, and to locating and connecting to destination devices outside of a serving cell site.
II. Background of the Invention
[0002] Wireless telephones, such as but not limited to wireless telephones that communicate using Code Division Multiple Access (CDMA) spread spectrum modulation techniques, communicate over the air with system infrastructure using wireless telephone over-the-air communication protocols, e.g., the CDMA protocols known as IS-95A, IS-95B, and IS-2000. The system infrastructure, which can include base stations (BTS), base station controllers (BSC), and other components, connects the wireless telephone to another communication device, such as a through land line or another wireless communication system.
[0003] With the growth of the Internet, computer-to-computer communication using
Internet Protocols (IP) has become ubiquitous. Furthermore, it has become desirable not only to facilitate computer data communication using IP, but to facilitate voice communication using IP as well. As but one advantage afforded by using IP in a telephony infrastructure, much hardware such as switches can be eliminated, and existing computers and software can be used instead, reducing cost. To this end, so- called voice over IP (VOIP) has been introduced. As recognized herein, however, VOIP data is latency-sensitive (i.e., it is desirable that voice data not be unduly delayed in transmission between people conversing with each other).
[0004] To connect an originating device with a destination device, an auxiliary IP-based protocol known as Session Initiation Protocol (SIP) is used. Using a protocol such as SIP, a wireless device is associated with an IP address and a unique identifying alphanumeric packet address, such as "sip://MY_PHONE@qualcornm.com." An SIP server functions as a directory of endpoints and their associated IP addresses and packet addresses. Accordingly, to participate in IP-based communication such as VOIP, a device must register its IP address with the SIP server. When an originating device
requests a connection to an IP-based destination device, the SIP server either gives the destination IP address to the originating device, or it establishes a connection with the destination device and then acts as a proxy for the originating and destination devices.
[0005] In any case, when an originating device places a call to a destination device in the same service system (an "intrasystem" call), an SIP server that may be associated with the system knows both addresses and consequently establishes, perhaps using one or more options such as an "encryption" option, an IP connection between the two devices. On the other hand, if the destination device is not in the same wireless service system as the originating device (an "intersystem" call), its address will not appear in the SIP server database, and the SIP server consequently forwards the call request to other SIP servers until the destination address is located or until the request times out.
[0006] As, recognized by the present invention, because the transmission of packets is
IP-based, intrasystem calls and intersystem calls in particular can result in transmitting packets over publicly-accessible portions of the Internet, resulting in unpredictable and potentially fluctuating delays. In the case of latency-intensive applications such as NOIP, this can severely compromise performance, since a calling party might experience undue delays in having his voice heard by a called party and vice- versa.
[0007] Standard voice-over-IP telephony calls originated to destinations within the same service system are connected to the destination party using Internet Protocol (IP) routing techniques with the assistance of a SIP server, as noted above. NOIP telephone calls originated to destinations outside of the originating service system to destinations on the PSTN require format conversion at the boundary of the originating packet system (the "intranet") and the PSTN. A "VOIP gateway" is a device well known in the art that converts between VOIP and PSTN formats. In order to perform this conversion, the VOIP gateway requires knowledge of the voice encoding and voice call signaling used within the originating IP system (intranet). Hence, NOIP systems employ standardized voice encoding techniques. Another case of NOIP calls of increasing interest are encrypted NOIP calls. Encrypted NOIP calls use voice encoding involving exchange of encryption establishment information between the two (or more) participating phones, and subsequent exchange of encrypted voice packets. These encrypted voice packets are not understood by NOIP gateways, and must be exchanged between the participating phones using a data network. In other words, an end-to-end data connection is required
between the participating phones. Having made the above critical observations, the present invention provides the solutions disclosed herein.
SUMMARY OF THE INVENTION
[0008] A voice over Internet (VOIP) system includes an IP-based infrastructure component commumcating with a wireless communication originating device. An SIP server communicates with the infrastructure component, and a modem bank is associated with the SIP server and is connected to the PSTN. The SIP server selectively uses the modem bank to instantiate a circuit-switched call from the originating device to a destination device. In a preferred embodiment, the SIP server instantiates circuit- switched calls only for intersystem calls requiring voice-call-latency characteristics and end-to-end data connectivity, as might be indicated by, e.g., an address or portion thereof of the destination device not being registered with the SIP server, and/or specific SIP call setup parameters. Thus, the SIP server does not instantiate a circuit-switched call for an intrasystem call, e.g., a call to a destination device currently served by the same intranet as the originating device.
[0009] hi a particularly preferred non-limiting embodiment, the destination device has an IP address of the form "sip://DN@service.com", and the circuit switched call is instantiated using the DN portion of the IP address. In one embodiment, the SIP server maps the DN to the modem bank and completes the call through the PSTN. Additional information conveyed, potentially including optional SIP call parameters, can be used to identify a NOIP call as a secure call requiring instantiation of the circuit switched call.
[0010] hi another aspect, a method for NOIP includes receiving, from an originating wireless device in a first service system, a call request for a destination device that has an IP address. The method then determines whether the destination device is in the first service system. If the destination device is in the first service system, communication is established between the originating device and destination device within the first service system without using the public Internet. Otherwise, a circuit-switched call is established between the destination device and originating device using the PSTN, particularly if the call is encrypted, hi neither case are Internet connections which potentially are subject to unpredictable delays, such as the publicly accessible portions of the Internet, used to complete the VOIP call.
[0011] In still another aspect, a computer program device includes means for receiving a call request at an SE? server. The call request is generated by a wireless communication originating device, and it indicates a destination device. The program device also includes means for determining whether the destination device is registered with the SEP server. Means are provided for transmitting P packets between the destination device and originating device without using the public Internet when the destination device is registered with the SEP server. Also, however, means are provided for transmitting EP packets between the destination device and originating device using an instantiated circuit-switched connection when the destination device is not registered with the SEP server, and perhaps only when the call is encrypted.
[0012] The details of the present invention, both as to its structure and operation, can best be understood in reference to the accompanying drawings, in which like reference numerals refer to like parts, and in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a block diagram of a presently preferred inventive wireless communication system; [0014] Figure 2 is a flow chart of the overall logic used in the system shown in Figure 1 ; and [0015] Figure 3 is a flow chart of the circuit switched call instantiation logic.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0016] Referring initially to Figure 1, a system is shown, generally designated 10, for effecting communication between an originating wireless communication device 12 and a destination communication device using an EP-based telephony infrastructure 14. The infrastructure 14 generally is not part of the publicly-accessible Internet. In one non- limiting embodiment the device 12 is a mobile telephone made by Kyocera, Samsung, or other manufacturer that uses Code Division Multiple Access (CDMA) principles and CDMA over-the-air (OTA) communication air interface protocols such as defined in but not limited to IS-95A, IS-95B, TJCDMA, IS-2000, and others to communicate with the infrastructure 14.
[0017] For. instance, the wireless communication systems to which the present invention can apply, in amplification to those noted above, to Personal Communications Service (PCS) and cellular systems, such as Analog Advanced Mobile Phone System (AMPS) and the following digital systems: CDMA, Time Division Multiple Access (TDM A), and hybrid systems that use both TDMA and CDMA technologies. A CDMA cellular system is described in the Telecommunications Industry Association/Electronic Industries Association (TIA/EIA) Standard IS-95. Combined AMPS and CDMA systems are described in TLAJEIA Standard IS-98. Other communications systems are described in the International Mobile Telecommunications System 2000/Universal Mobile Telecommunications Systems (IMT-2000/UM), standards covering what are referred to as wideband CDMA (WCDMA), cdma2000 (such as cdma2000 lx or 3x standards, for example) or TD-SCDMA.
[0018] The present invention applies to any wireless communication device 12; for illustration it will be assumed that the device 12 is a telephone 12. In general, wireless communication devices to which the present invention applies may include but are not limited to a wireless handset or telephone, a cellular phone, a data transceiver, or a paging and position determination receiver, and can be hand-held, or portable as in vehicle-mounted (including cars, trucks, boats, planes, trains), as desired. However, while wireless communication devices are generally viewed as being mobile, it is to be understood that the present invention can be applied to "fixed" units in some implementations. Also, the present invention applies to data modules or modems used to transfer voice and/or data information including digitized video information, and may communicate with other devices using wired or wireless links. Further, commands might be used to cause modems or modules to work in a predetermined coordinated or associated manner to transfer information over multiple communication channels. Wireless communication devices are also sometimes referred to as user terminals, mobile stations, mobile units, subscriber units, mobile radios or radiotelephones, wireless units, or simply as "users" and "mobiles" in some communication systems.
[0019] As shown in Figure 1 , the wireless telephone 12 communicates, using one or more of the above-mentioned systems, with at least one first infrastructure component 16 that accesses an SEP server 18 that executes the logic of the present invention. The first component 16 preferably is a base station (BTS), but it can also be implemented by
base station controller (BSC), mobile switching center (MSC), gateway to a satellite system, or other infrastructure component or combination of two or more of the above, i any case, the first component 16 not only supports the necessary protocols and systems to communicate with the wireless device 12, but also supports EP and attendant protocols or stack of EP protocols.
[0020] As shown in Figure 1 , the SEP server 18 communicates with publicly-accessible portions of the Internet 20. Also, a modem bank 22 is associated with the SEP server 18. The modem bank 22 can embody a VOEP gateway to the public switched telephone network (PSTN) 24 using a signaling protocol such as ISUP and using a physical system such as SS7.
[0021] With the above overview of the present architecture in mind, it is to be understood that the present logic is executed on the architecture shown in Figure 1 in accordance with the flow charts discussed below. The flow charts herein illustrate the structure of the logic of the present invention as embodied in computer program software. Those skilled in the art will appreciate that the flow charts illustrate the structures of logic elements, such as computer program code elements or electronic logic circuits, that function according to this invention. Manifestly, the invention is practiced in its essential embodiment by a machine component that renders the logic elements in a form that instructs a digital processing apparatus (that is, a computer, controller, processor, etc.) to perform a sequence of function steps corresponding to those shown.
[0022] In other words, the logic may be embodied by a computer program that is executed by a processor within, e.g., the SEP server 18 as a series of computer- or control element-executable instructions. These instructions may reside, for example, in RAM or on a hard drive or optical drive, or the instructions may be stored on magnetic tape, electronic read-only memory, or other appropriate data storage device that can be dynamically changed or updated.
[0023] Now referring to Figure 2, the logic that is executed when a call is placed by the originating device 12 is shown. Commencing at step 26, the call is received by the SEP server 18. Moving to decision diamond 28, it is determined whether the call is an intersystem call or an intrasystem call. One way to make this determination is to determine whether the EP address of the destination device is registered with the SEP
server 18. If it is registered with the SEP server 18, an intrasystem call is indicated, and the logic flows to step 30 to deliver VOEP packets directly to the destination device through the infrastructure 14 without using the public Internet 20.
[0024] In contrast, when the destination device address is not registered with the SEP server 18, i.e., when an intersystem call is otherwise indicated, the preferred non- limiting logic flows from decision diamond 28 to decision diamond 31 to determine whether the call is an encrypted VOEP call. If it is, the logic moves to step 32, wherein a circuit-switched call to the destination device is instantiated through the modem bank 22 and PSTN 24 using the logic shown in Figure 3. Thus, transmission of data packets through the public Internet 20 is avoided for encrypted calls, and point-to-point communication is established. That is, instantiation of the circuit-switched call might be made in response to one or more predetermined SEP options, such as "encrypted", i.e., the circuit-switched call might be instantiated only for encrypted VOEP calls and not for unencrypted VOEP calls, if desired, although all intersystem calls can be so treated. In the preferred logic shown in Figure 2, however, if the intersystem call is not encrypted, at step 33 the logic delivers the call through a conventional VOEP gateway or via the public Internet 20.
[0025] Now referring to Figure 3, a first implementation of the circuit-switched call instantiation logic is shown. Commencing at step 34, the DN of the destination device is mapped to the modem bank 22. For instance, for a device having an SEP address of "sip://DN@qualcomm.com", the DN portion of the address is mapped to the modem bank 22. Then, at block 36 the call is completed through the PSTN 24 using the modem bank 22. As mentioned above, this can be undertaken based on additional SEP information in the call, such as "encrypted" call, indicating that the call is encrypted.
[0026] While the particular SYSTEM AND METHOD FOR ROUTING VOICE OVER
EP CALLS as herein shown and described in detail is fully capable of attaining the above-described objects of the invention, it is to be understood that it is the presently preferred embodiment of the present invention and is thus representative of the subject matter which is broadly contemplated by the present invention, that the scope of the present invention fully encompasses other embodiments which may become obvious to those skilled in the art, and that the scope of the present invention is accordingly to be limited by nothing other than the appended claims, in which reference to an element in
the singular is not intended to mean "one and only one" unless explicitly so stated, but rather "one or more." All structural and functional equivalents to the elements of the above-described preferred embodiment that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the present claims. Moreover, it is not necessary for a device or method to address each and every problem sought to be solved by the present invention, for it to be encompassed by the present claims. Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is to be construed under the provisions of 35 U.S.C. §112, sixth paragraph, unless the element is expressly recited using the phrase "means for" or, in the case of a method claim, the element is recited as a "step" instead of an "act."
Claims (9)
- CLAIMS WHAT IS CLAIMED IS:[cl] 1. A voice over Internet (VOEP) system, comprising: at least one EP-based infrastructure component communicating with at least one wireless originating device; at least one SEP server communicating with the infrastructure component; and at least one modem bank associated with the SEP server and connected to a PSTN, the SEP server selectively using the modem bank to instantiate a circuit-switched call from the originating device to a destination device.[c2] 2. The system of Claim 1 , wherein the SEP server initiates the instantiation of circuit-switched calls only for encrypted intersystem calls.[c3 ] 3. The system of Claim 1 , wherein the SEP server initiates the instantiation of a circuit-switched call to the destination device when an address or portion thereof of the destination device is not in the same system as the originating device.[c4] 4. The system of Claim 1 , wherein the SEP server does not instantiate a circuit- switched call for an intrasystem call.[c5] 5. The system of Claim 1 , wherein the SEP server does not instantiate a circuit- switched call to a destination device having an address or portion thereof registered with the SEP server.[c6] 6. The system of Claim 3 , wherein the destination device has an EP address of the form "sip://DN@service.com", and the circuit switched call is instantiated using the DN portion of the EP address.[c7] 7. The system of Claim 6, wherein the SEP server maps the DN to the modem bank and completes the call through the PSTN. [c8] 8. The system of Claim 1 , wherein at least the originating device uses CDMA principles.[c9] 9. A method for VOEP, comprising: receiving from an originating wireless device in a first service system a call request for a destination device having an EP address; determining whether the destination device is in the first service system; if the destination device is in the first service system, establishing VOEP communication between the originating device and destination device within the first service system without using the public Internet; otherwise: establishing a circuit-switched VOEP call between the destination device and originating device using the PSTN.[clO] 10. The method of Claim 9, wherein the act of establishing is undertaken by instantiating a circuit-switched call through a modem bank associated with the first service system only for encrypted calls.[ell] 11. The method of Claim 10, wherein the determining act is undertaken based on the EP address of the destination device.
- [cl2] 12. The method of Claim 10, comprising mapping at least a DN of the destination device to the modem bank and completing the call through the PSTN.
- [c 13 ] 13. The method of Claim 9, wherein at least the originating device uses CDMA.
- [cl4] 14. A computer program device, comprising: means for receiving a call request at an SEP server, the call request being generated by a wireless communication originating device and indicating a destination device; means for determining whether the destination device is registered with the SEP server; means for transmitting EP packets between the destination device and originating device without using the public Internet when the destination device is registered with the SEP server; and means for transmitting EP packets between the destination device and originating device using an instantiated circuit-switched connection when the destination device is not registered with the SEP server.
- [cl5] 15. The device of Claim 14, wherein the means for transmitting EP packets between the destination device and originating device using an instantiated circuit-switched connection includes means for instantiating a circuit-switched call through a modem bank associated with the SEP server only for encrypted calls.
- [cl6] 16. The device of Claim 15, wherein the means for transmitting EP packets between the destination device and originating device using an instantiated circuit-switched connection includes means for mapping at least a DN of the destination device to the modem bank and completing the call through a PSTN.
- [cl7] 17. A method for executing an encrypted VOEP call between an originating device and a destination device, comprising: requesting an encrypted call to the destination device; and establishing one of two communication pathways between the devices based on the request, neither pathway traversing publicly-accessible portions of the Internet.
- 18. The method of Claim 17, wherein an intrasystem pathway is established within an EP infrastructure, no part of the intrasystem pathway traversing the public Internet.
- [cl9] 19. The method of Claim 18, wherein an intersystem pathway is established including the EP infrastructure, at least one modem bank associated therewith, and the PSTN connected to the modem bank, whereby no part of the intersystem pathway traverses the public Internet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/005,773 US6813264B2 (en) | 2001-11-02 | 2001-11-02 | System and method for routing voice over IP calls |
US10/005,773 | 2001-11-02 | ||
PCT/US2002/035272 WO2003041362A2 (en) | 2001-11-02 | 2002-11-01 | System and method for routing voice over ip calls |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2002356895A1 true AU2002356895A1 (en) | 2003-07-24 |
AU2002356895B2 AU2002356895B2 (en) | 2008-04-17 |
Family
ID=21717671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2002356895A Ceased AU2002356895B2 (en) | 2001-11-02 | 2002-11-01 | System and method for routing voice over IP calls |
Country Status (11)
Country | Link |
---|---|
US (1) | US6813264B2 (en) |
EP (1) | EP1442582A2 (en) |
JP (1) | JP4260015B2 (en) |
CN (1) | CN100550890C (en) |
AU (1) | AU2002356895B2 (en) |
BR (1) | BR0213782A (en) |
CA (1) | CA2466191A1 (en) |
MX (1) | MXPA04004223A (en) |
MY (1) | MY130644A (en) |
TW (1) | TWI254535B (en) |
WO (1) | WO2003041362A2 (en) |
Families Citing this family (106)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6738373B2 (en) * | 2002-02-11 | 2004-05-18 | Qualcomm Incorporated | Wireless communication device operable on different types of communication networks |
US8290505B2 (en) | 2006-08-29 | 2012-10-16 | Telecommunications Systems, Inc. | Consequential location derived information |
US7426380B2 (en) | 2002-03-28 | 2008-09-16 | Telecommunication Systems, Inc. | Location derived presence information |
US8918073B2 (en) | 2002-03-28 | 2014-12-23 | Telecommunication Systems, Inc. | Wireless telecommunications location based services scheme selection |
US7321773B2 (en) | 2002-03-28 | 2008-01-22 | Telecommunication Systems, Inc. | Area watcher for wireless network |
US9154906B2 (en) | 2002-03-28 | 2015-10-06 | Telecommunication Systems, Inc. | Area watcher for wireless network |
US9572095B2 (en) * | 2002-05-06 | 2017-02-14 | Avaya Inc. | Intelligent selection of message delivery mechanism |
US7706516B2 (en) * | 2002-10-02 | 2010-04-27 | Avaya Inc. | Intelligent handling of message refusal |
US9558475B2 (en) * | 2002-05-06 | 2017-01-31 | Avaya Inc. | Location based to-do list reminders |
US7571317B1 (en) * | 2002-09-11 | 2009-08-04 | Cisco Technology, Inc. | Providing user notification signals in phones that use encryption |
US7487199B2 (en) * | 2002-09-24 | 2009-02-03 | Motorola, Inc. | Method and apparatus for maintaining SIP contact addresses |
JP3914861B2 (en) * | 2002-11-29 | 2007-05-16 | Necインフロンティア株式会社 | Communications system |
GB2398458B (en) * | 2003-02-15 | 2005-05-25 | Ericsson Telefon Ab L M | Conversational bearer negotiation |
US7412521B2 (en) * | 2003-03-12 | 2008-08-12 | Microsoft Corporation | End-point identifiers in SIP |
GB2407449A (en) * | 2003-10-22 | 2005-04-27 | Coolnection Technology Co Ltd | Integrated communication device linking telephone to internet and pstn |
AU2003294519A1 (en) | 2003-12-15 | 2005-06-29 | Bce Inc. | Adapter for secure voip communications |
US7260186B2 (en) | 2004-03-23 | 2007-08-21 | Telecommunication Systems, Inc. | Solutions for voice over internet protocol (VoIP) 911 location services |
US20080126535A1 (en) | 2006-11-28 | 2008-05-29 | Yinjun Zhu | User plane location services over session initiation protocol (SIP) |
US20080090546A1 (en) | 2006-10-17 | 2008-04-17 | Richard Dickinson | Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging |
US7903791B2 (en) | 2005-06-13 | 2011-03-08 | Telecommunication Systems, Inc. | Enhanced E911 location information using voice over internet protocol (VoIP) |
US7389357B2 (en) * | 2004-01-20 | 2008-06-17 | Cisco Technology, Inc. | Arrangement in an IP node for preserving security-based sequences by ordering IP packets according to quality of service requirements prior to encryption |
US7308101B2 (en) * | 2004-01-22 | 2007-12-11 | Cisco Technology, Inc. | Method and apparatus for transporting encrypted media streams over a wide area network |
JP2005236537A (en) | 2004-02-18 | 2005-09-02 | Nec Access Technica Ltd | Voip wireless telephone system and method using wireless lan |
WO2005081553A1 (en) * | 2004-02-20 | 2005-09-01 | Remmelg & Pojad OÜ | System and method for routing a telephone call either through a telephone network or through an ip based network to a subscriber |
WO2005084128A2 (en) * | 2004-03-04 | 2005-09-15 | Outsmart Ltd. | Integration of packet and cellular telephone networks |
US7730519B2 (en) | 2004-09-17 | 2010-06-01 | At&T Intellectual Property I, L.P. | Detection of encrypted packet streams using feedback probing |
US8332938B2 (en) | 2004-09-17 | 2012-12-11 | At&T Intellectual Property I, L.P. | Detection of encrypted packet streams using a timer |
US7761705B2 (en) * | 2004-09-17 | 2010-07-20 | At&T Intellectual Property I, L.P. | Detection of encrypted packet streams |
US7451309B2 (en) * | 2004-09-17 | 2008-11-11 | At&T Intellectual Property L.P. | Signature specification for encrypted packet streams |
US20060064748A1 (en) * | 2004-09-17 | 2006-03-23 | Aaron Jeffrey A | Detection of encrypted packet streams using process variation and/or multiple processes |
US20060072464A1 (en) * | 2004-09-17 | 2006-04-06 | Aaron Jeffrey A | Detection of encrypted packet streams |
US20060115068A1 (en) * | 2004-11-30 | 2006-06-01 | Smart-Ss7 Ltd. | Virtual service switching function |
ATE483323T1 (en) * | 2004-12-16 | 2010-10-15 | Swisscom Ag | METHOD FOR SELECTING THE NETWORK OVER WHICH COMMUNICATION SHOULD BE CARRIED OUT |
GB2422272A (en) * | 2005-01-14 | 2006-07-19 | King S College London | Network mobility |
US20060177029A1 (en) * | 2005-02-10 | 2006-08-10 | Outsmart Ltd. | Virtual multi-line telephone service |
US7353034B2 (en) | 2005-04-04 | 2008-04-01 | X One, Inc. | Location sharing and tracking using mobile phones or other wireless devices |
US7937069B2 (en) * | 2005-04-29 | 2011-05-03 | Rassam Frederic | System and process for switching between cell phone and landline services |
US8103242B2 (en) * | 2005-05-26 | 2012-01-24 | Telecommunication Systems, Inc. | E911 call blocking for non-initialized wireless telephones |
US8175570B2 (en) * | 2005-05-26 | 2012-05-08 | Telecommunication Systems, Inc. | E911 call blocking for non-initialized wireless telephones |
US8116722B2 (en) * | 2005-05-26 | 2012-02-14 | Telecommunication Systems, Inc. | E911 call blocking for non-initialized wireless telephones |
US8660573B2 (en) * | 2005-07-19 | 2014-02-25 | Telecommunications Systems, Inc. | Location service requests throttling |
US7664100B2 (en) * | 2005-08-09 | 2010-02-16 | Sunman Engineering, Inc. | Voice-over-IP telephone devices and systems |
US8971309B1 (en) * | 2005-08-23 | 2015-03-03 | Sprint Communications Company L.P. | Universal voice over packet protocol call structure |
US20070123271A1 (en) * | 2005-08-26 | 2007-05-31 | Richard Dickinson | Cellular phone tracking scope |
US7933385B2 (en) | 2005-08-26 | 2011-04-26 | Telecommunication Systems, Inc. | Emergency alert for voice over internet protocol (VoIP) |
US9282451B2 (en) | 2005-09-26 | 2016-03-08 | Telecommunication Systems, Inc. | Automatic location identification (ALI) service requests steering, connection sharing and protocol translation |
US7907551B2 (en) | 2005-10-06 | 2011-03-15 | Telecommunication Systems, Inc. | Voice over internet protocol (VoIP) location based 911 conferencing |
US7626951B2 (en) * | 2005-10-06 | 2009-12-01 | Telecommunication Systems, Inc. | Voice Over Internet Protocol (VoIP) location based conferencing |
US8467320B2 (en) | 2005-10-06 | 2013-06-18 | Telecommunication Systems, Inc. | Voice over internet protocol (VoIP) multi-user conferencing |
US7804954B2 (en) * | 2005-11-17 | 2010-09-28 | Microsoft Corporation | Infrastructure for enabling high quality real-time audio |
US20070115949A1 (en) * | 2005-11-17 | 2007-05-24 | Microsoft Corporation | Infrastructure for enabling high quality real-time audio |
US9258386B2 (en) | 2005-11-18 | 2016-02-09 | Telecommunication Systems, Inc. | Voice over internet protocol (VoIP) mobility detection |
US7752315B2 (en) * | 2005-12-01 | 2010-07-06 | International Business Machines Corporation | Method for extending the use of SIP (session initiated protocol) for providing debug services |
CA2570711C (en) * | 2005-12-20 | 2012-07-31 | Bce Inc. | Apparatus and method for supporting multiple traffic categories at a single networked device |
US8634353B2 (en) * | 2006-02-02 | 2014-01-21 | Qualcomm Incorporated | Apparatus and method for hybrid automatic repeat request |
US20090323673A1 (en) * | 2006-02-13 | 2009-12-31 | Out-Smart Ltd | Portable Soft Phone |
US8150363B2 (en) * | 2006-02-16 | 2012-04-03 | Telecommunication Systems, Inc. | Enhanced E911 network access for call centers |
US8059789B2 (en) | 2006-02-24 | 2011-11-15 | Telecommunication Systems, Inc. | Automatic location identification (ALI) emergency services pseudo key (ESPK) |
US20080062987A1 (en) * | 2006-09-11 | 2008-03-13 | D & S Consulting, Inc. | Method and system for wireless VoIP communications |
US8594075B2 (en) * | 2006-04-19 | 2013-11-26 | D & S Consultants, Inc. | Method and system for wireless VoIP communications |
US8208605B2 (en) | 2006-05-04 | 2012-06-26 | Telecommunication Systems, Inc. | Extended efficient usage of emergency services keys |
US8532266B2 (en) | 2006-05-04 | 2013-09-10 | Telecommunication Systems, Inc. | Efficient usage of emergency services keys |
GB2439368B (en) * | 2006-06-23 | 2008-05-21 | Motorola Inc | Method and apparatus for supporting voice communications |
US8284923B2 (en) * | 2006-09-11 | 2012-10-09 | Microsoft Corporation | Bridging messages to release enterprise ports |
US8559947B2 (en) * | 2006-09-13 | 2013-10-15 | Mformation Software Technologies Llc | System and method to enable subscriber self-activation of wireless data terminals |
WO2008057477A2 (en) | 2006-11-03 | 2008-05-15 | Telecommunication Systems, Inc. | Roaming gateway enabling location based services (lbs) roaming for user plane in cdma networks without requiring use of a mobile positioning center (mpc) |
US8050386B2 (en) * | 2007-02-12 | 2011-11-01 | Telecommunication Systems, Inc. | Mobile automatic location identification (ALI) for first responders |
US9462060B2 (en) * | 2007-04-23 | 2016-10-04 | Alcatel Lucent | System and method for sending notification message to a mobile station using session initiation protocol (SIP) |
US8520805B2 (en) * | 2007-05-02 | 2013-08-27 | Telecommunication Systems, Inc. | Video E911 |
US9413889B2 (en) | 2007-09-18 | 2016-08-09 | Telecommunication Systems, Inc. | House number normalization for master street address guide (MSAG) address matching |
US7808894B2 (en) * | 2007-11-09 | 2010-10-05 | International Business Machines Corporation | Managing bursts of traffic in such a manner as to improve the effective utilization of session servers |
US7916643B2 (en) * | 2007-11-09 | 2011-03-29 | International Business Machines Corporation | Limiting extreme loads at session servers |
CA2705961C (en) | 2007-11-21 | 2016-07-05 | Bce Inc. | Method and apparatus for enabling a calling party to leave a voice message for a called party |
US9042526B2 (en) | 2007-11-23 | 2015-05-26 | Bce Inc. | Method and apparatus for enabling a calling party to leave a voice message for a called party in response to a command provided by the calling party |
US8494134B2 (en) | 2007-12-19 | 2013-07-23 | Bce Inc. | Method and system for routing calls placed to a telephony identifier associated with a group of identities |
WO2009079735A1 (en) * | 2007-12-21 | 2009-07-02 | Bce Inc. | A method and system for establishing a connection with a packet-based application server |
WO2009079736A1 (en) | 2007-12-21 | 2009-07-02 | Bce Inc. | Method and apparatus for interrupting an active telephony session to deliver information to a subscriber |
US11317174B2 (en) | 2007-12-27 | 2022-04-26 | Bce Inc. | Method and system for modifying routing information associated to a party |
US8693652B2 (en) | 2007-12-27 | 2014-04-08 | Bce Inc. | Method and system for processing calls in an architecture allowing a telephony identifier to be associated with a group of identities |
US8576991B2 (en) | 2008-03-19 | 2013-11-05 | Telecommunication Systems, Inc. | End-to-end logic tracing of complex call flows in a distributed call system |
CA2647920C (en) | 2008-12-24 | 2015-11-24 | Bce Inc. | Method and system for routing telephony communications together with modified calling party identifier information |
US9591610B1 (en) | 2009-02-13 | 2017-03-07 | Sprint Spectrum L.P. | Method and system for zone based paging based on congestion |
US9301191B2 (en) | 2013-09-20 | 2016-03-29 | Telecommunication Systems, Inc. | Quality of service to over the top applications used with VPN |
US8867485B2 (en) | 2009-05-05 | 2014-10-21 | Telecommunication Systems, Inc. | Multiple location retrieval function (LRF) network having location continuity |
US8730871B2 (en) * | 2009-05-22 | 2014-05-20 | Raytheon Company | System and method for providing voice communications over a multi-level secure network |
CN101764871B (en) * | 2009-12-23 | 2013-08-07 | 成都三零瑞通移动通信有限公司 | Method for encrypting voice to transmit in PSTN network |
US8688087B2 (en) | 2010-12-17 | 2014-04-01 | Telecommunication Systems, Inc. | N-dimensional affinity confluencer |
US8942743B2 (en) | 2010-12-17 | 2015-01-27 | Telecommunication Systems, Inc. | iALERT enhanced alert manager |
WO2012087353A1 (en) | 2010-12-22 | 2012-06-28 | Telecommunication Systems, Inc. | Area event handling when current network does not cover target area |
WO2012141762A1 (en) | 2011-02-25 | 2012-10-18 | Telecommunication Systems, Inc. | Mobile internet protocol (ip) location |
US9479344B2 (en) | 2011-09-16 | 2016-10-25 | Telecommunication Systems, Inc. | Anonymous voice conversation |
US8831556B2 (en) | 2011-09-30 | 2014-09-09 | Telecommunication Systems, Inc. | Unique global identifier header for minimizing prank emergency 911 calls |
US9264537B2 (en) | 2011-12-05 | 2016-02-16 | Telecommunication Systems, Inc. | Special emergency call treatment based on the caller |
US9313637B2 (en) | 2011-12-05 | 2016-04-12 | Telecommunication Systems, Inc. | Wireless emergency caller profile data delivery over a legacy interface |
US8984591B2 (en) | 2011-12-16 | 2015-03-17 | Telecommunications Systems, Inc. | Authentication via motion of wireless device movement |
US9384339B2 (en) | 2012-01-13 | 2016-07-05 | Telecommunication Systems, Inc. | Authenticating cloud computing enabling secure services |
US9307372B2 (en) | 2012-03-26 | 2016-04-05 | Telecommunication Systems, Inc. | No responders online |
US9544260B2 (en) | 2012-03-26 | 2017-01-10 | Telecommunication Systems, Inc. | Rapid assignment dynamic ownership queue |
US9338153B2 (en) | 2012-04-11 | 2016-05-10 | Telecommunication Systems, Inc. | Secure distribution of non-privileged authentication credentials |
WO2014028712A1 (en) | 2012-08-15 | 2014-02-20 | Telecommunication Systems, Inc. | Device independent caller data access for emergency calls |
US9208346B2 (en) | 2012-09-05 | 2015-12-08 | Telecommunication Systems, Inc. | Persona-notitia intellection codifier |
US9456301B2 (en) | 2012-12-11 | 2016-09-27 | Telecommunication Systems, Inc. | Efficient prisoner tracking |
US8983047B2 (en) | 2013-03-20 | 2015-03-17 | Telecommunication Systems, Inc. | Index of suspicion determination for communications request |
US9408034B2 (en) | 2013-09-09 | 2016-08-02 | Telecommunication Systems, Inc. | Extended area event for network based proximity discovery |
US9516104B2 (en) | 2013-09-11 | 2016-12-06 | Telecommunication Systems, Inc. | Intelligent load balancer enhanced routing |
US9479897B2 (en) | 2013-10-03 | 2016-10-25 | Telecommunication Systems, Inc. | SUPL-WiFi access point controller location based services for WiFi enabled mobile devices |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USH1641H (en) | 1993-11-30 | 1997-04-01 | Gte Mobile Communications Service Corporation | Connection of mobile devices to heterogenous networks |
AU740602B2 (en) | 1997-09-04 | 2001-11-08 | British Telecommunications Public Limited Company | Telecommunications system |
US6567398B1 (en) * | 1998-06-05 | 2003-05-20 | Lucent Technologies Inc. | Distributed call system |
US6584093B1 (en) * | 1998-08-25 | 2003-06-24 | Cisco Technology, Inc. | Method and apparatus for automatic inter-domain routing of calls |
SE519438C2 (en) | 1998-11-30 | 2003-02-25 | Ericsson Telefon Ab L M | Dynamic allocation of addresses and address translation in a communication network consisting of at least two different subnetworks |
US6556547B1 (en) * | 1998-12-15 | 2003-04-29 | Nortel Networks Limited | Method and apparatus providing for router redundancy of non internet protocols using the virtual router redundancy protocol |
US6445695B1 (en) * | 1998-12-31 | 2002-09-03 | Nortel Networks Limited | System and method for supporting communications services on behalf of a communications device which cannot provide those services itself |
FI107099B (en) | 1999-04-14 | 2001-05-31 | Ericsson Telefon Ab L M | Routing between telecommunications networks |
US6625141B1 (en) * | 1999-06-18 | 2003-09-23 | Telefonaktiebolaget L M Ericsson (Publ) | System and method for providing value-added services (VAS) in an integrated telecommunications network using session initiation protocol (SIP) |
US6392999B1 (en) * | 1999-08-10 | 2002-05-21 | Lucent Technologies Inc. | Conferencing and announcement generation for wireless VoIP and VoATM calls |
US6477150B1 (en) * | 2000-03-03 | 2002-11-05 | Qualcomm, Inc. | System and method for providing group communication services in an existing communication system |
-
2001
- 2001-11-02 US US10/005,773 patent/US6813264B2/en not_active Expired - Fee Related
-
2002
- 2002-10-31 MY MYPI20024079A patent/MY130644A/en unknown
- 2002-11-01 WO PCT/US2002/035272 patent/WO2003041362A2/en active Application Filing
- 2002-11-01 TW TW091132401A patent/TWI254535B/en not_active IP Right Cessation
- 2002-11-01 JP JP2003543275A patent/JP4260015B2/en not_active Expired - Fee Related
- 2002-11-01 CA CA002466191A patent/CA2466191A1/en not_active Abandoned
- 2002-11-01 BR BR0213782-8A patent/BR0213782A/en not_active IP Right Cessation
- 2002-11-01 CN CNB028263480A patent/CN100550890C/en not_active Expired - Fee Related
- 2002-11-01 EP EP02802832A patent/EP1442582A2/en not_active Withdrawn
- 2002-11-01 MX MXPA04004223A patent/MXPA04004223A/en active IP Right Grant
- 2002-11-01 AU AU2002356895A patent/AU2002356895B2/en not_active Ceased
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6813264B2 (en) | System and method for routing voice over IP calls | |
AU2002356895A1 (en) | System and method for routing voice over IP calls | |
US6845092B2 (en) | System and method for mobile station authentication using session initiation protocol (SIP) | |
EP2265080B1 (en) | Subsequent set-up of circuit-switched and packet-switched connections | |
US7120133B1 (en) | System and method of linking a wireless signaling protocol with a media gateway control protocol in a packet-based network | |
US7463615B2 (en) | System and method for extended SIP headers for CDMA parameters | |
US7974270B2 (en) | Media route optimization in network communications | |
JP3844730B2 (en) | Apparatus for providing public mobile communication network and private wireless network integration service, and mobile communication network including the apparatus | |
KR100457185B1 (en) | Tone Providing Method in Next Generation Network | |
CN101084659B (en) | Method and system for providing private voice call service to mobile subscriber and wireless soft switch apparatus therefor | |
EP1834452B1 (en) | Methods, systems, and computer program products for caching and re-using bearer channels for voice-over-packet (vop) sessions involving wireless entities | |
KR20040104709A (en) | System and method for registering ip address of wireless communication device | |
US20030169768A1 (en) | Call initiation for legacy mobile circuit switched domain wireless systems | |
JP4213344B2 (en) | System and method for mobile data services | |
EP1190584B1 (en) | Telecommunication network and routing method | |
US7089011B1 (en) | Method and system for selective call routing for transcoder free operation | |
US20020082006A1 (en) | Arranging internal data connections of office system | |
JP4570433B2 (en) | Hybrid base station equipment | |
US7590143B2 (en) | System and method for voice over IP | |
US20030012151A1 (en) | System and method for paging for voice over IP | |
US20030021260A1 (en) | System and method for frame selection in IP-based CDMA network | |
KR20040076662A (en) | Interoperation method of video telephony between wcdma network and cdma2000 1xev-do network | |
KR20020049675A (en) | Method for controlling picture call in mobile communication system | |
JP4233788B2 (en) | Call setup method | |
KR20030059532A (en) | Mobile communication system having a ip based mobile switching center |