US008279831 B2 (12) United States Patent (10) Patent No.: US 8.279,831 B2 Sengupta et al. (45) Date of Patent: Oct. 2, 2012 (54) SYSTEM, METHOD, AND 2005/0159.153 A1 7/2005 Mousseau et al. COMPUTER-READABLE MEDIUM FOR 2005/02491.61 A1 11/2005 Carlton 2006, OO25151 A1 2/2006 Karaoguz et al. SELECTING ANETWORK FOR 2007/0014281 A1 1/2007 Kant ............................. 370,352 CONNECTIVITY AND HANDOVER BASED 2007/0032239 A1 2/2007 Shaheen et al. ON APPLICATION REQUIREMENTS 2007/0115899 A1 5/2007 Ovadia et al. 2007/0173283 A1* 7, 2007 Livet et al. ................. 455,552.1 (75) Inventors: Chaitali Sengupta, Richardson, TX (US); Yuan Kang Lee, San Diego, CA FOREIGN PATENT DOCUMENTS (US) WO WO O2, 19736 A2 3, 2002 WO WO 2004/100452 A1 11, 2004 (73) Assignee: SNRLab Corporation, Richardson, TX W. W. 3988, A: (39. OTHER PUBLICATIONS (*) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 PCT International Preliminary Examining Authority—European U.S.C. 154(b) by 1059 days Patent Office, PCT Notification of Transmittal of the International M YW- Preliminary Report on Patentability mailed Feb. 6, 2009, Interna (21) Appl. No.: 11/929,066 tional Application No. PCT/US2007/083129, filed Oct. 31, 2007, 11 pages, NL-2280 HV Rijswijk. 1-1. 3GPP SA WG2, 3rd Generation Partnership Project: Technical (22) Filed: Oct. 30, 2007 Specification Group Services and Architecture; Feasibility Study on O O Multimedia Session Continuity; Stage 2: (Release 8), 3GPP TR (65) Prior Publication Data 23.893 (Oct. 2007), 3GPP Technical Recommendation, Oct. 23, US 2008/O1 O1292 A1 May 1, 2008 2007, pp. 1033, XP002474433, URL:http://www.3gpp.org/ftp/ Specs/archive/23 series/23.893/23893-030.zip. Related U.S. Application Data (Continued) (60) Provisional application No. 60/863.931, filed on Nov. 1, 2006. Primary Examiner — Sai-Ming Chan (51) Int. Cl (74) Attorney, Agent, or Firm — Jones Day H0474/00 (2009.01) (52) U.S. Cl. ........................................ 370/331; 455/436 (57) ABSTRACT (58) Field of Classification Search .................. 370/331; A system, method, and computer-readable medium are pro 455/436 vided for choosing a network for connection and handover See application file for complete search history. based on the application requirements of a multi-mode, multi (56) References Cited radio user equipment. The selection of the network for con nectivity and handover is based on one or more of the invok ing of an application, the invoking of a second application, U.S. PATENT DOCUMENTS and the closing of an application. 7,009,952 B1 3, 2006 Razavilar et al. 7,161,914 B2 * 1/2007 Shoaib et al. ................. 370,331 7,711,366 B1* 5/2010 O’Neil et al. ................. 455,438 13 Claims, 2 Drawing Sheets 100 y WPortal Support and Network Application Server 18 Systems Service Brokar (SCIM IMS 170 sSS CSCF MGCF2 ^ 174 MGC 7isg - Medi 73 Gateway - Gy &E3 - GSGSN 121 3. to UTRAN 122 UTRAN Packet UMTS2 clau?sia32 is 182 US 8,279.831 B2 Page 2 OTHER PUBLICATIONS Subsystem (IMS); Stage 2: (Release 7), 3GPP TS 23.206 V7.0.0 (Sep. 2006), Technical Specification, Oct. 4, 2006, pp. 1-33, PCT International Searching Authority—European Patent Office, XP002465453, URL:http://www.3gpp.org/ftp/Specs/archive/23 PCT Notification of Transmittal of the International Search Report series/23.206/23206-700.zip. and the Written Opinion of the International Searching Authority, or PCT International Preliminary Examining Authority—European the Declaration, International Application No. PCT/US2007/ Patent Office, PCT Notification of Transmittal of the International 083129, filed Oct. 31, 2007, Apr. 14, 2008, 11 pages, NL-2280 HV Preliminary Report on Patentability mailed Jun. 2, 2009, Interna Rijswijk. tional Application No. PCT/US2009/031291, filed Jan. 16, 2009, 13 3GPP SA WG2, 3rd Generation Partnership Project: Technical pages, NL-2280 HV Rijswijk. Specification Group Services and System Aspects; Voice Call Con tinuity (VCC) between Circuit Switched (CS) and IP Multimedia * cited by examiner U.S. Patent Oct. 2, 2012 Sheet 1 of 2 US 8,279,831 B2 |Osw |eun6|- ^~~. U.S. Patent Oct. 2, 2012 Sheet 2 of 2 US 8,279,831 B2 210 Email Browser VoIP CS - 210 210a 210 21 Oc 210 Port 1 Port 2 Port 3 SDP RTP/RTCP - 220 220 220c Socket 1 Socket 2 Socket 3 TCP23a UDP 231 Secondary Primary Secondary PDP context 1 PDP context PDP context 1 250b. 250a 250c ==l - F Wireless Broadband Radio Cellular Radio Interface Interface | 240a 241a UMTS Non-Access Stratum: 240 21 Wireless Broadband Protocol 24Ot. Stack (PHY, MAC, security, CSL) 241b. UMTS Access Stratum 24Oc - - - - - - - - - - - - - - - - - - - - - US 8,279,831 B2 1. 2 SYSTEM, METHOD, AND of components and arrangements are described below to sim COMPUTER-READABLE MEDIUM FOR plify the present disclosure. These are, of course, merely SELECTING ANETWORK FOR examples and are not intended to be limiting. In addition, the CONNECTIVITY AND HANDOVER BASED present disclosure may repeat reference numerals and/or let ON APPLICATION REQUIREMENTS 5 ters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a rela RELATED APPLICATION DATA tionship between the various embodiments and/or configura tions discussed. This patent application claims the benefit of provisional FIG. 1 is a diagrammatic representation of an embodiment U.S. Patent Application Ser. No. 60/863.931, filed Nov. 1, 10 of a network system 100 in which IMS may be deployed. FIG. 2006, which is hereby incorporated by reference. The follow 1 is intended as an example, and not as an architectural ing applications also claim priority to the above referenced limitation, of embodiments described herein. IMS infrastruc provisional application and are related to the present applica ture may be deployed in stages and may include infrastructure tion. They are incorporated by reference herein. developed and manufactured by a variety of vendors that may Copending U.S. Utility patent application Ser. No. 1 1/929, 15 be deployed by any number of service carriers or operators. 231, filed on Oct. 30, 2007 and entitled “System, System 100 may include any variety of access networks. In Method, and Computer-Readable Medium for User the illustrative example, system 100 includes a wireless local Equipment Decision-Making Criteria for Connectivity area network (WLAN) 110, e.g., a network implemented in and Handover compliance with the IEEE 802.11 standards, a packet Copending U.S. Utility patent application Ser. No. 1 1/929, Switched universal mobile telecommunications system 376, filed on Oct. 30, 2007 and entitled “System, (UMTS) 120, a circuit switched UMTS 130, a public Method, and Computer-Readable Medium for User switched telephone network (PSTN) 140 and corresponding Equipment Managing Multiple Radio Networks for signaling system 141. Such as a signaling system #7 network, Handover and Low-Power Operations' and other IP access networks 150. PSTN 140 provides circuit 25 Switched telecommunication services to one or more circuit BACKGROUND switched endpoints 163. WLAN 110 may interface with IMS 170 via WLAN access gateway (WAG) 111. WLAN 110 may A multi-mode, multi-radio user equipment is capable of include a packet data gateway (PDG) 112, one or more access obtaining services through multiple radio networks, for points 113 that may provide wireless access to user equip example, via a wireless wide area network (WWAN) such as 30 ments (UEs) 160-162, and various other equipment as is GSM/UMTS and via a wireless local area network (WLAN) understood. Packet UMTS 120 may include one or more such as 802.11a/b/g. Such a user equipment must decide on gateway general packet radio service (GPRS) support nodes which network it should attach, begin active services, and to (GGSNs) and serving GPRS support nodes (SGSNs) (collec which network it must handover its active services. tively referred to herein as G/SGSN 121. Packet switched One of the main attributes of a multi-mode, multi-radio 35 UMTS 120 may include a UMTS radio access network (UT user equipment is its capability to offer a rich set of applica RAN) 122 that may provide radio access to UEs 160-162 and tions. Instead of simply offering a voice call application, a various other equipment as is understood. WAG 111 com modern multi-mode, multi-radio user equipment may offer prises a gateway between WLAN 110 and 3GPP/IMS net both basic applications and more advanced ones such as web work 100. A Packet Data Gateway (PDG) 112 provides browsing, video sharing, location-based services, peer-to 40 access to PS-based services for a WLANUE. Circuit UMTS peer file sharing, etc. A modern multi-mode multi-radio user 130 may include a mobile services switching center (MSC) equipment may be looked at less like a phone but more like a 131, a UTRAN 132, and various other equipment as is under Sophisticated multimedia computer and communicator. stood. Disadvantageously, some applications may be better Suited Various terminals may connect with one or more of the for a particular network environment relative to other network 45 access networks. As referred to herein, a user equipment (UE) environments on which the user equipment may attach. Thus, comprises a terminal or station that may connect with one or a user equipment may be attach to a particular network and more access networks forestablishing a session with an entity may remain attached thereto regardless of the applications of system 100 or another user equipment or terminal con run on the user equipment. nected with one or more of the access networks of system 100 50 or another telecommunication system.