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( 12 ) United States Patent US010306580B1 (12 ) United States Patent ( 10 ) Patent No. : US 10 , 306 ,580 B1 Gupta ( 45 ) Date of Patent: May 28 , 2019 ( 54) SINGLE REGISTRATION MODE SUPPORT (58 ) Field of Classification Search FOR INTERWORKING BETWEEN 5GC AND None EPC See application file for complete search history. ( 71) Applicant : Intel IP Corporation , Santa Clara , CA PO) References Cited (US ) U . S . PATENT DOCUMENTS ( 72 ) Inventor: Vivek G . Gupta , San Jose , CA (US ) 8 ,515 ,465 B2 * 8 /2013 Olsson H04W 68 / 00 370 / 312 (73 ) Assignee : Intel IP Corporation , Santa Clara , CA 9 ,225 , 399 B2 * 12/ 2015 Shan .. H04W 28 / 24 (US ) * cited by examiner ( * ) Notice : Subject to any disclaimer , the term of this Primary Examiner — Joshua L Schwartz patent is extended or adjusted under 35 (74 ) Attorney , Agent, or Firm — Schwegman Lundberg & U . S . C . 154 (b ) by 0 days. Woessner , P . A . (21 ) Appl . No. : 16 / 195 , 147 (57 ) ABSTRACT Systems and methods of enabling intersystem changes ( 22 ) Filed : Nov. 19 , 2018 between 4G and 5G are described . The UE in single regis tration mode handles default EPS bearer contexts and PDU session contexts as if the N26 interface were supported Related U . S . Application Data before making the determination whether N26 interface is supported or not during an initial EPS Attach procedure . (60 ) Provisional application No .62 / 588 ,787 , filed on Nov . After determining that the N26 interface is unsupported , the 20 , 2017 . UE maps active PDU session contexts to default EPS bearer (51 ) Int . CI. contexts and modifies the PDU session context state from H04W 8 / 02 ( 2009. 01 ) active to inactive before completing the intersystem change . H04W 36 / 00 ( 2009 .01 ) The UE either acts as if the N26 interface were supported H04W 36 / 14 ( 2009 .01 ) and loses all the PDN connections or PDU sessions during H04W 60 / 00 ( 2009 .01 ) the intersystem change , or enters a modified single registra (52 ) U . S . CI. tion mode in which the states of the EPC and 5G system are CPC .. .. .. H04W 60 / 005 (2013 .01 ) ; H04W 8 / 02 partially isolated from each other during the intersystem ( 2013 .01 ) ; H04W 36/ 0033 (2013 . 01 ) ; H04W change . 36 / 14 ( 2013 .01 ) 23 Claims, 9 Drawing Sheets 902 Intersystem Change Between 4GC and 5GC 904 Engage in registration - 906 Receive N26 Indication N - basic N26 supported ? 908 _ Nenhanced Yes 912 910 918 Operate Like N26 Follow N26 Map PDU Session Contexts to Supported Supported Procedure Default EPS Bearer Contexts 914 918 Re -establish PDN Connections/ PDU sesslons Switch to SR * Mode 802 Attach to New Network 920 Re - establish PDN Connections/ PDU sessions 922 Exit SR * Mode U . S . Patent May 28 , 2019 Sheet 1 of 9 US 10 ,306 ,580 B1 -100 wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww 170 www www www Smart Battery www 145 150 www.it www c155 09LJ 165< * www Touch Screen DisplayDriver Memory www Sensors * PMIC w. Removable www withwww www ww www www *www 105 120 FIG.1 Wwwwwwwwwwwwwwwwwwwwwwwwwwwww* * RadioFrontEndModule Sub-System Memory wwwwwwwwwwwwwwwww Baseband ApplicationProcessor *www * W * *WWW * * W * www www 140 www 735 www Www * wwwwwwwwwwwwwwwwwwww ConnectivitySub-System NFC Controller Audio Driver Camera Driver Wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - U . S . Patent May 28 , 2019 Sheet 2 of 9 US 10 , 306 ,580 B1 200 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 240 230 Tee Power wwww ©215 -235 c225 RadioFront EndModule Network Controller PMIC 215 210 205 FIG.2 RadioFront Sub-System www EndModule Baseband ApplicationProcessor Memory - - - 245 - * GPS User Receiver Interface -* - ** * - - - - - - - - ** * ** * * * * - - - - - - ** * * * * * * - - - - - - - - - - - - U . S . Patent May 28 , 2019 Sheet 3 of 9 US 10 , 306 ,580 B1 wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww Mitih Mi Mi Mi M i Mih ? ? ? 300_r ? ? ? ? ? ? ? AntennaArray ? ? ? ? ? ? ? ? ? ? 325 ? ? ? ? ? ? ? ? Radio Circuitry ? Frequency ? ? ? ? ? ? ? ? ? 315- ? ? ? FIG.3 ? ? ? ? ? ? ? ? ? ? ? TransmitCircuitry ReceiveCircuitry ? ? ? wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww ? ? ? ? ? ? ? ? ? ? 305 ? ? ? ? ? ? ProtocolProcessing Circuitry DigitalBaseband Circuitry ? wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww ??? U . S . Patent May 28 , 2019 Sheet 4 of 9 US 10 ,306 ,580 B1 447 420 c440 430 -410 445 - <449 435III IIII425 ServiceDataAdaptationProtocol III415 PocketDataConvergenceProtocol RadioLinkControl MediumAccessControl PhysicalLayer 1405 I 450 FIG.4 457c 5456455< Ir456 11459U Non-AccessStratum RedTRadioRadioResourceControl U . S . Patent May 28 , 2019 Sheet 5 of 9 US 10 ,306 ,580 B1 5056. - - - - - - - - - - - - - 592 - - - - - - - - - NAS - - - - AMF - - - wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww 580 - - - - - - www www w wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww ** * * * * * * ** * * ** * * wwwwwwwwwwwwwwwwwwww ** W * W * * W - - 586 - 584 588 - c582 c590 - - - - RRC PDCP RLC MAC PHYPHY FIG.5 - - NB - - - . - - - - - - - - - - - - - - - 6560- 562 - 564< K - - - - NAS RRC RLC PHY - PDCP MAC - - - - - - wwwwwwwwwwww wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww swom www w w w w U . S . Patent May 28 , 2019 Sheet 6 of 9 US 10 , 306 ,580 B1 620 623 625 626< Application Server P-GW PCRF 630- CN HSS 624 622 MME S-GW 621 614 S1 FIG.6 - 1 - - - - - - WittWewwwwwwwwwww RAN RANIMACRO NODE LPRANNODE 6102. 611 612 603 604- enny UE UE 000 AP 601 606 600 U . S . Patent May 28 , 2019 Sheet 7 of 9 US 10 , 306 ,580 B1 - - - - - - Application Function - - - - - - - - - - - - - - NG5 - - - - - - - - - - - 716 - - - - - - - - - - - - PCF - - - - - - - 706 - - - - - - - - - NG7 NG9 - - NG15 UPF - - - NG4 - - - 14/ - - FIG.7 - - - - - - NG3 - - - SMF - - - - - - - - 724 NG10 - - - 5704 - - - - - NG11 (R)AN - - UDM - - - - NG2 - - - NG8 - - - <712 - - NG13 NG14 - AMF - - - 722 NG12 702 - NG1 - - UE - AUSF - - + - - - - - - - - - - - - - - - - - U . S . Patent May 28 , 2019 Sheet 8 of 9 US 10 , 306 ,580 B1 800 5828 HSS + UDM 5832 PCF + PCRF - 820 N7 t - 826/ 844 8404 S6a SMF + N8 PGW - C S5 - C / N4 UPF + PGW - U N11 824 155Sou- U Petrul NIT S11 SGW 826 /846 822 5842 MME N26 AMF , S1- MME IN3 N2 810 830 N1 E -UTRAN NG -RAN 802 UE UE FIG . 8 U . S . Patent May 28 , 2019 Sheet 9 of 9 US 10 , 306 ,580 B1 900 c902 Intersystem Change Between 4GC and 5GC 904 Engage in registration 906 Receive N26 Indication N -basic N26 supported ? < 908 N -enhanced Yes < 912 910 916 Operate Like N26 Follow N26 Map PDU Session Contexts to Supported Supported Procedure Default EPS Bearer Contexts 914 918 Re -establish PDN Connections /PDU sessions Switch to SR * Mode 802 Attach to New Network 920 Re- establish PDN Connections/ PDU sessions 922 BestExit SR * Mode recen FIG . 9 US 10 ,306 ,580 B1 SINGLE REGISTRATION MODE SUPPORT FIG . 9 illustrates a flowchart of an intersystem change in FOR INTERWORKING BETWEEN 5GC AND accordance with some embodiments . EPC DETAILED DESCRIPTION PRIORITY CLAIM The following description and the drawings sufficiently This application claims the benefit of priority under 35 lustrate specific embodimentstenable the skilled in the art to practice them . Other embodiments may incorporate U . S . C . 119( e ) to U . S . Provisional Patent Application Ser. structural, logical, electrical, process , and other changes . No . 62 /588 , 787 , filed Nov. 20 , 2017 , which is incorporated 10 Portions and features of some embodiments may be included herein by reference in its entirety . in , or substituted for , those of other embodiments . Embodi ments set forth in the claims encompass all available equiva TECHNICAL FIELD lents of those claims. Any of the radio links described herein may operate Embodiments pertain to radio access networks (RANs ). 15 according to any one or more of the following exemplary Some embodiments relate to cellular and wireless local area radio communication technologies and /or standards includ network (WLAN ) networks , including Third Generation ing , but not limited to : a Global System for Mobile Com Partnership Project Long Term Evolution ( 3GPP LTE ) net munications (GSM ) radio communication technology, a works and LTE advanced (LTE - A ) networks as well as General Packet Radio Service (GPRS ) radio communication legacy networks , 4th generation (4G ) networks and 5th 20 technology , an Enhanced Data Rates for GSM Evolution generation (5G ) networks . Some embodiments relate to (EDGE ) radio communication technology , and / or a Third improvements in interworking between heterogeneous com Generation Partnership Project ( 3GPP ) radio communica munication networks. tion technology , for example Universal Mobile Telecommu nications System (UMTS ) , Freedom of Multimedia Access BACKGROUND 25 (FOMA ) , 3GPP Long Term Evolution (LTE ) , 3GPP Long Term Evolution Advanced (LTE Advanced ) , Code division The use of various types of systemshas increased due to multiple access 2000 (CDMA2000 ) , Cellular Digital Packet both an increase in the types of devices user equipment Data (CDPD ), Mobitex , Third Generation ( 3G ) , Circuit (UEs ) using network resources as well as the amount of data Switched Data ( CSD ) , High - Speed Circuit -Switched Data and bandwidth being used by various applications , such as 30 (HSCSD ) , Universal Mobile Telecommunications System video streaming , operating on these UEs . To increase the ( Third Generation ) (UMTS (3G ) ) , Wideband
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