US20110149852A1 - Keeping packet switched session in lte while circuit switched registered in wcdma - Google Patents

Keeping packet switched session in lte while circuit switched registered in wcdma Download PDF

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Publication number
US20110149852A1
US20110149852A1 US12/943,612 US94361210A US2011149852A1 US 20110149852 A1 US20110149852 A1 US 20110149852A1 US 94361210 A US94361210 A US 94361210A US 2011149852 A1 US2011149852 A1 US 2011149852A1
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US
United States
Prior art keywords
registration
core network
service
circuit switched
wcdma
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.)
Abandoned
Application number
US12/943,612
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English (en)
Inventor
Magnus Olsson
Göran Rune
Per Synnergren
Erik Westerberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to US12/943,612 priority Critical patent/US20110149852A1/en
Priority to JP2012543943A priority patent/JP2013514701A/ja
Priority to PCT/IB2010/055601 priority patent/WO2011073847A2/en
Priority to CA2784099A priority patent/CA2784099A1/en
Priority to IN5003DEN2012 priority patent/IN2012DN05003A/en
Priority to JP2012543945A priority patent/JP2013514702A/ja
Priority to EP10805334A priority patent/EP2514230A2/de
Priority to PCT/IB2010/055609 priority patent/WO2011073849A1/en
Priority to EP10807376A priority patent/EP2514224A1/de
Priority to SG2012044301A priority patent/SG181739A1/en
Priority to SG2012043071A priority patent/SG181650A1/en
Priority to EP10809072.1A priority patent/EP2514242B1/de
Priority to PCT/IB2010/055778 priority patent/WO2011073884A1/en
Priority to JP2012543972A priority patent/JP2013514705A/ja
Priority to PCT/IB2010/055816 priority patent/WO2011073910A1/en
Priority to JP2012543973A priority patent/JP5622863B2/ja
Priority to SG2012043097A priority patent/SG181651A1/en
Priority to PCT/IB2010/055820 priority patent/WO2011073913A1/en
Priority to EP10810882.0A priority patent/EP2514231B1/de
Priority to SG2012044319A priority patent/SG181740A1/en
Priority to EP10810975A priority patent/EP2514232A1/de
Priority to JP2012543984A priority patent/JP2013514709A/ja
Priority to PCT/IB2010/055888 priority patent/WO2011073946A1/en
Priority to IN5907DEN2012 priority patent/IN2012DN05907A/en
Priority to SG2012044327A priority patent/SG181741A1/en
Priority to EP10813022A priority patent/EP2514233A1/de
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) reassignment TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OLSSON, MAGNUS, WESTERBERG, ERIK, RUNE, GORAN, SYNNERGREN, PER
Publication of US20110149852A1 publication Critical patent/US20110149852A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005—Multiple registrations, e.g. multihoming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • This technology pertains to wireless communications networks, and particularly to access division multiplexing (ADM).
  • ADM access division multiplexing
  • wireless terminals also known as mobile stations and/or user equipment units (UEs) communicate via a radio access network (RAN) to one or more core networks.
  • the radio access network (RAN) covers a geographical area which is divided into cell areas, with each cell area being served by a base station, e.g., a radio base station (RBS), which in some networks may also be called, for example, a “NodeB” (UMTS) or “eNodeB” (LTE).
  • RBS radio base station
  • a cell is a geographical area where radio coverage is provided by the radio base station equipment at a base station site. Each cell is identified by an identity within the local radio area, which is broadcast in the cell.
  • the base stations communicate over the air interface operating on radio frequencies with the user equipment units (UE) within range of the base stations.
  • radio network controller such as a radio network controller (RNC) or a base station controller (BSC)
  • RNC radio network controller
  • BSC base station controller
  • the radio network controllers are typically connected to one or more core networks.
  • the Universal Mobile Telecommunications System is a third generation mobile communication system, which evolved from the second generation (2G) Global System for Mobile Communications (GSM).
  • UTRAN is essentially a radio access network using wideband code division multiple access for user equipment units (UEs).
  • 3GPP Third Generation Partnership Project
  • telecommunications suppliers propose and agree upon standards for third generation networks and UTRAN specifically, and investigate enhanced data rate and radio capacity.
  • Specifications for the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) are ongoing within the 3 rd Generation Partnership Project (3GPP).
  • the Evolved Universal Terrestrial Radio Access Network comprises the Long Term Evolution (LTE) and System Architecture Evolution (SAE).
  • LTE Long Term Evolution
  • SGW Serving Gateways
  • RNC radio network controller
  • RAN radio access network
  • RNC radio network controller
  • CS Cellular Circuit-Switched
  • LTE long-term evolution
  • 3GPP The long-term evolution (LTE) project within 3GPP aims to further improve the 3G standard to, among other things, provide even better mobile broadband to the end-users (higher throughput, lower round-trip-times, etc.).
  • CSFB circuit switched fallback
  • IMS IP Multimedia Subsystem
  • MMTel Multimedia Telephony
  • PSTN Public Switched Telephone Network
  • PLMN Public Land Mobile Network
  • UMA Unlicensed Mobile Access
  • GAN Generic Access Network
  • the IMS/MMTel approach uses a completely new core/service layer that is IMS based. This provides new possibilities to enhance the service but also comes with the drawback of a financial hurdle for the operator to overcome.
  • a new core network drives capital expenditures (CAPEX), and integration of that core network drives an initial operating expenditures (OPEX) increase.
  • the IMS/MMTel approach needs features implemented in the terminals and the legacy CS network in order to handle voice handover to/from the 2G/3G CS telephony service.
  • UMA/GAN over LTE is not a standardized solution so a drawback is that it is a proprietary solution which may make terminal availability a problem. It also adds additional functions to the core/service layer in both the network and terminal, e.g., a GAN controller in the network and GAN protocols in the UE terminal.
  • ADM Access Division Multiplexing
  • a wireless terminal simultaneously communicates with two TDMA-based radio systems, e.g., the wireless terminal can maintain communications paths to both systems by means of alternating in time its communication between the two systems. The toggling between the two systems is on a time scale small enough to effectively yield a simultaneous communication between the two systems.
  • the ADM solution attempts to achieve a good PS connection in parallel with the telephony service when in LTE coverage but still reusing the legacy CS core and deployed GSM network for the telephony service to reduce costs but still maintain good coverage for the telephony service.
  • the ADM solution may be implemented in several ways.
  • a first example implementation, illustrated in FIG. 1A is a fully UE centric solution where no coordination is needed between the GSM CS core and a LTE PS core.
  • a second example implementation, illustrated by FIG. 1B is a network assisted solution which can either be based on circuit switched fallback (CSFB), or a solution that only reuses paging over LTE.
  • CSFB circuit switched fallback
  • the ADM solution can be realized in any of three different ways:
  • the LTE transmissions could be multiplexed with the GSM transmissions on a GSM TDMA frame level.
  • frames for GSM transmissions and frames of LTE transmissions have different darkness shading.
  • This first example solution requires that the GSM circuit switched (CS) telephony service only use the half rate codec. When GSM is running at half rate, then every second GSM TDMA frame is not used by the user.
  • CS GSM circuit switched
  • the LTE transmissions could be multiplexed with the GSM transmissions on GSM burst level.
  • GSM transmits speech using bursts, each with a duration of 0.577 ms.
  • the Rx/Tx part sleeps for 7*0.577 ms until it wakes up again and do a new Rx/Tx process.
  • this time gap could be used for LTE transmissions.
  • any of above can be used for transmission but by using dual receiver for simultaneous reception of GSM and LTE in the downlink for simplified operation.
  • CSFB circuit switched fallback
  • LTE Long Term Evolution
  • PS packet switched
  • FIG. 3 the dashed line represents the user plane of the PS session.
  • FIG. 4 shows what would occur if a circuit switched (CS) voice-centric device could register for CS services in GSM while keeping the PS session in LTE.
  • CS circuit switched
  • the ADM approach such as that of PCT/SE2007/000358 assumes that CS voice centric devices need to camp on WCDMA as shown in FIG. 5 .
  • the dashed line represents the user plane of the PS session and the green solid line represents the CS registration (control plane). This means that CS voice centric devices cannot benefit from the improved performance of the LTE access. (Typically, LTE provides increased bandwidth and reduced latency (round-trip delay)).
  • Moving to WCDMA includes additional steps as shown in FIG. 6 and FIG. 7 .
  • FIG. 6 Cell Re-selection to WCDMA where combined LA/RA Update is not used
  • FIG. 7 Cell Re-selection to WCDMA where combined LA/RA Update is used
  • the combined LA/RA Update is used.
  • the technology disclosed herein concerns a wireless terminal configured, when already having a registration and/or session for a packet switched (PS) service with a Long Term Evolution (LTE) core network, to make a registration for a circuit switched (CS) service over a Wide Band Code Division Multiplexing (WCDMA) air interface with a circuit switched (CS) core network.
  • the wireless terminal is configured, in conjunction with the registration for the circuit switched (CS) service, to maintain the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network.
  • the wireless terminal is configured to refrain from making a registration for a packet switched (PS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with a packet switched (PS) core network in conjunction with making the registration for the circuit switched (CS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with the circuit switched (CS) core network.
  • the wireless terminal is configured, in conjunction with the registration for the circuit switched (CS) service, to refrain from performing a routing area update towards the Wide Band Code Division Multiplexing (WCDMA) packet switched (PS) core network.
  • the wireless terminal is configured to maintain the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network until such time as a circuit switched (CS) connection is established, but to perform a routing area update towards the Wide Band Code Division Multiplexing (WCDMA) packet switched (PS) core network when a circuit switched (CS) connection is established.
  • PS packet switched
  • LTE Long Term Evolution
  • WCDMA Wide Band Code Division Multiplexing
  • the wireless terminal comprises a communication interface and a registration controller.
  • the communication interface is arranged to communicate, over the air interface, a message configured to make the registration for the circuit switched (CS) service.
  • the registration controller is configured to make the registration for the circuit switched (CS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with the circuit switched (CS) core network while maintaining the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network.
  • WCDMA Wide Band Code Division Multiplexing
  • the technology disclosed herein concerns a method of operating a wireless terminal.
  • the method comprises the wireless terminal, when already having a registration and/or session for a packet switched (PS) service with a Long Term Evolution (LTE) core network, making a registration for a circuit switched (CS) service over a Wide Band Code Division Multiplexing (WCDMA) air interface with a circuit switched (CS) core network.
  • the method further comprises the wireless terminal maintaining the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network in conjunction with the registration for the circuit switched (CS) service.
  • PS packet switched
  • LTE Long Term Evolution
  • WCDMA Wide Band Code Division Multiplexing
  • the wireless terminal refrains from making a registration for a packet switched (PS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with a packet switched (PS) core network in conjunction with making the registration for the circuit switched (CS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with the circuit switched (CS) core network.
  • the wireless terminal method comprises the wireless terminal refraining from performing a routing area update towards the Wide Band Code Division Multiplexing (WCDMA) packet switched (PS) core network in conjunction with the registration for the circuit switched (CS) service.
  • the wireless terminal method further comprises the wireless terminal refraining from performing a routing area update towards the Wide Band Code Division Multiplexing (WCDMA) packet switched (PS) core network in conjunction with the registration for the circuit switched (CS) service.
  • the wireless terminal method further comprises the wireless terminal performing a routing area update towards the Wide Band Code Division Multiplexing (WCDMA) packet switched (PS) core network when a circuit switched (CS) connection is established.
  • WCDMA Wide Band Code Division Multiplexing
  • PS circuit switched
  • the technology disclosed herein concerns a communications network comprising a Long Term Evolution (LTE) core network; a circuit switched (CS) core network such as a WCDMA network; and a wireless terminal.
  • the wireless terminal is configured, when already having a registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network, to make a registration for a circuit switched (CS) service over a Wide Band Code Division Multiplexing (WCDMA) air interface with the circuit switched (CS) core network.
  • the wireless terminal is further configured to maintain the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network in conjunction with the registration for the circuit switched (CS) service.
  • the technology disclosed herein concerns a method of operating such a communications network.
  • FIG. 1A is a diagrammatic view illustrating a fully UE centric solution ADM solution where no coordination is needed between a GSM CS core and a LTE PS core.
  • FIG. 1B is a diagrammatic view illustrating a network assisted ADM solution which can either be based on CS fallback (CSFB), or a solution that only reuses paging over LTE.
  • CSFB CS fallback
  • FIG. 2A , FIG. 2B , and FIG. 2C are differing example radio-realized embodiments illustrated of ADM solutions, with FIG. 2A showing an embodiment comprising a single receiver/transmitter with GSM at half rate and multiplexing on a TDMA frame level; FIG. 2B showing an embodiment comprising a single receiver/transmitter with multiplexing on a burst period level; and FIG. 2C showing an embodiment comprising a dual receiver/single transmitter.
  • FIG. 3 is a diagrammatic view showing a packet switched-only device in a Long Term Evolution (LTE) packet switched session.
  • LTE Long Term Evolution
  • FIG. 4 is a diagrammatic view showing a voice centric device being registered in GSM with a Long Term Evolution (LTE) packet switched session.
  • LTE Long Term Evolution
  • FIG. 5 is a diagrammatic view showing movement of a packet switched session to WCDMA when being circuit switch registered in WCDMA.
  • FIG. 6 is a diagrammatic view depicting basic acts or steps involved in cell re-selection to WCDMA without use of a combined location area and routing area update.
  • FIG. 7 is a diagrammatic view depicting basic acts or steps involved in cell re-selection to WCDMA with use of a combined location area and routing area update.
  • FIG. 8 is a diagrammatic view depicting a wireless terminal participating in access division multiplexing (ADM) with a LTE network and a WCDMA network.
  • ADM access division multiplexing
  • FIG. 9 shows basic, representative acts or steps comprising a method of operating wireless terminal according to an example mode and embodiment.
  • FIG. 10 shows basic, representative acts or steps comprising a method of operating wireless terminal according to a specific implementation of the example mode and embodiment of FIG. 9 .
  • FIG. 11 is a schematic view of an example embodiment of a wireless terminal.
  • FIG. 12 is a more detailed schematic view of an example embodiment of a wireless terminal showing a platform implementation
  • FIG. 13 is a diagrammatic view depicting basic acts or steps involved in cell re-selection to WCDMA without use of a combined location area and routing area update and while maintaining a packet switched registration and/or packet switched session in LTE.
  • FIG. 14 is a diagrammatic view depicting basic acts or steps involved in cell re-selection to WCDMA with use of a combined location area and routing area update and while maintaining registration and/or session for a packet switched service with the Long Term Evolution (LTE) core network.
  • LTE Long Term Evolution
  • FIG. 15 is a diagrammatic view showing maintenance of a packet switched (PS) registration and/or session in Long Term Evolution (LTE) while being CS registered in WCDMA.
  • PS packet switched
  • LTE Long Term Evolution
  • block diagrams herein can represent conceptual views of illustrative circuitry or other functional units embodying the principles of the technology.
  • any flow charts, state transition diagrams, pseudocode, and the like represent various processes which may be substantially represented in computer readable medium and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.
  • the functional blocks may include or encompass, without limitation, digital signal processor (DSP) hardware, reduced instruction set processor, hardware (e.g., digital or analog) circuitry including but not limited to application specific integrated circuit(s) [ASIC], and (where appropriate) state machines capable of performing such functions.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • a computer is generally understood to comprise one or more processors or one or more controllers, and the terms computer and processor and controller may be employed interchangeably herein.
  • the functions may be provided by a single dedicated computer or processor or controller, by a single shared computer or processor or controller, or by a plurality of individual computers or processors or controllers, some of which may be shared or distributed.
  • processor or “controller” shall also be construed to refer to other hardware capable of performing such functions and/or executing software, such as the example hardware recited above.
  • a user equipment unit (UE) or wireless terminal 30 can participate in access division multiplexing (ADM) with two radio access technology networks in parallel.
  • FIG. 8 shows a cell of Long Term Evolution (LTE) network 22 - 1 and a cell of WCDMA network 22 - 2 (a 3G network).
  • LTE Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • FIG. 8 shows a cell of Long Term Evolution (LTE) network 22 - 1 and a cell of WCDMA network 22 - 2 (a 3G network).
  • LTE Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • the LTE network 22 - 1 does not provide circuit switched (CS) services, so that a wireless terminal 30 participating in packet switched (PS) services offered by LTE network 22 - 1 must turn to another network, e.g., WCDMA network 22 - 2 for circuit switched (CS) services.
  • PS packet switched
  • the technology disclosed herein enables circuit switched (CS) voice centric devices to benefit from the improved performance of the Long Term Evolution (LTE) access as long as there is no CS voice call ongoing.
  • the solution is UE-centric which means that the wireless terminal (e.g., user equipment unit [UE]) is registered for CS services in WCDMA (in case WCDMA is the preferred access, based on 3GPP compliant idle mode behavior).
  • the wireless terminal does not register for packet switched (PS) services in WCDMA while being registered for CS services in WCDMA. This is done by registering for CS services, while keeping the PS registration/session in LTE.
  • PS packet switched
  • the term “session” is used herein to indicate an active packet switched (PS) connection, while the term “registration” is used for a terminal which is known to the network, and thus a terminal ready to have a “session” but not yet engaged in or participating in a session.
  • LTE Long Term Evolution
  • a “registration” is performed initially as an “Attach” and maintained (in Idle Mode) by “Tracking Area Updates”.
  • Connected Mode e.g. while having a “session”
  • the “registration” is maintained by “being connected to the network”.
  • WCDMA and GSM
  • a “session” in WCDMA requires a PDP Context Activation to establish the means of communication.
  • WCDMA a registration can be made and maintained without a PDP Context being activated.
  • FIG. 9 shows basic, representative acts or steps comprising a method of operating wireless terminal 30 according to an example mode and embodiment.
  • Act 9 - 1 comprises the wireless terminal, when already having a registration and/or session for a packet switched (PS) service with a Long Term Evolution (LTE) core network, making a registration for a circuit switched (CS) service over a Wide Band Code Division Multiplexing (WCDMA) air interface with a circuit switched (CS) core network.
  • Act 9 - 2 comprises the wireless terminal maintaining the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network in conjunction with the registration for the circuit switched (CS) service.
  • FIG. 1 comprises the wireless terminal, when already having a registration and/or session for a packet switched (PS) service with a Long Term Evolution (LTE) core network, making a registration for a circuit switched (CS) service over a Wide Band Code Division Multiplexing (WCDMA) air interface with a circuit switched (CS) core network.
  • act 9 - 2 takes the form of act 9 - 2 ( 10 ).
  • Act 9 - 2 ( 10 ) comprises the wireless terminal refraining from making a registration for a packet switched (PS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with a packet switched (PS) core network in conjunction with making the registration for the circuit switched (CS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with the circuit switched (CS) core network.
  • act 9 - 2 ( 10 ) comprises the wireless terminal refraining from performing a routing area update towards the Wide Band Code Division Multiplexing (WCDMA) packet switched (PS) core network in conjunction with the registration for the circuit switched (CS) service.
  • FIG. 11 shows an example, generic, and basic embodiment of wireless terminal 30 .
  • wireless terminal 30 comprises communication interface 40 and service registration controller 42 .
  • the communication interface 40 is arranged to engage in communications over an air interface, such communications including a message configured to make the registration for the circuit switched (CS) service.
  • the service registration controller 42 is configured to make the registration for the circuit switched (CS) service over the Wide Band Code Division Multiplexing (WCDMA) air interface with the circuit switched (CS) core network while maintaining the registration and/or session for a packet switched (PS) service with the Long Term Evolution (LTE) core network 22 - 1 .
  • service registration controller 42 comprises routing area update inhibitor 44 .
  • FIG. 12 shows a more detailed example embodiment of wireless terminal 30 ( 12 ) comprising a first controller 58 - 1 configured to handle administration and transmissions of LTE network 22 - 1 and second controller 58 - 2 configured to handle administration and transmissions of the WCDMA network 22 - 2 .
  • First controller 58 - 1 and second controller 58 - 2 can be realized or implemented by a same processor or controller (or processor system), and in such case may constitute separate sets of non-transitory executable signals (e.g., programs or routines stored on tangible media).
  • FIG. 12 further shows that certain functionalities of the example wireless terminal 30 ( 12 ) can be realized by and/or provided on a platform 60 .
  • the terminology “platform” is a way of describing how the functional units of a communications unit or node can be implemented or realized by machine.
  • One example platform is a computer implementation wherein one or more of the elements framed by line 60 , including but not limited to service registration controller 42 .
  • the functionalities shown as framed by platform 60 and even other functionalities can be realized by one or more processors which execute coded instructions stored in memory (e.g., non-transitory signals) in order to perform the various acts described herein.
  • the wireless terminal can comprise, in addition to a processor(s), a memory section 62 (which in turn can comprise random access memory 64 ; read only memory 66 ; application memory 68 (which stores, e.g., coded instructions which can be executed by the processor to perform acts described herein); and any other memory such as cache memory, for example).
  • the wireless terminal of each of the embodiments discussed herein can also comprise certain input/output units or functionalities, the representative input/output units for wireless terminal being illustrated in FIG. 12 as keypad 70 ; audio input device (e.g. microphone) 72 ; visual input device (e.g., camera) 74 ; visual output device (e.g., display 76 ); and audio output device (e.g., speaker) 78 .
  • Other types of input/output devices can also be connected to or comprise wireless terminal 30 .
  • the platform 60 has been illustrated as computer-implemented or computer-based platform.
  • Another example platform 60 for wireless terminal can be that of a hardware circuit, e.g., an application specific integrated circuit (ASIC) wherein circuit elements are structured and operated to perform the various acts described herein.
  • ASIC application specific integrated circuit
  • wireless terminal(s) can be mobile stations or user equipment units (UE) such as but not limited to mobile telephones (“cellular” telephones) and laptops with wireless capability), e.g., mobile termination), and thus can be, for example, portable, pocket, hand-held, computer-included, or car-mounted mobile devices which communicate voice and/or data with radio access network.
  • UE user equipment units
  • FIG. 13 shows Cell Re-selection to WCDMA where combined LA/RA Update is not used and modifications are required
  • FIG. 14 shows Cell Re-selection to WCDMA with combined LA/RA Update used and modifications are required.
  • the changes to the Cell Re-selection to WCDMA include that there is no RA Update (or combined LA/RA Update) towards the packet switched (PS) domain.
  • Refraining from a RA Update (or combined LA/RA Update) towards the WCDMA packet switched (PS) domain enable the existing packet switched (PS) session to be maintained in LTE while being CS registered in WCDMA as shown in FIG. 15 (PS Session maintained in LTE while being CS registered in WCDMA).
  • the wireless terminal can perform a routing area update towards the WCDMA PS Domain in conjunction with the CS call establishment.
  • the Registration Area (RA) Update can be sent before, after, or in parallel with the CS call establishment.
  • the technology disclosed herein keeps the PS session in LTE while CS-registered with WCDMA, but once a CS connection is established the PS session in LTE is terminated.
  • the RA Update can be sent before, after, or in parallel with the CS call establishment.
  • the RA Update is sent as soon as possible after the CS call establishment.
  • the WCDMA packet switched (PS) service starts essentially immediately after the routing area (RA) update.
  • An advantage of the technology disclosed herein is retaining the better packet switched (PS) session via LTE (rather than switching to WCMDA PS) during the period from WCDMA CS registration to establishment of a CS call.
  • PS packet switched
  • the wireless terminal For wireless terminals camping on WCDMA where LTE coverage is detected, the wireless terminal performs Tracking Area Update in LTE, as defined in 3GPP TS 23.401, General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access (Release 8) (chapter 5.3.3 for “54-SGSN” to MME and Annex D.3.6 for “Gn/Gp SGSN to MME” Tracking Area Update) (the contents of which are incorporated herein by reference) but continues to listen for CS voice Paging in WCDMA since it is still CS registered in WCDMA.
  • the mobility management entity MME is the network node that handles the Tracking Area Update, as described in 3GPP TS 23.401.
  • CS voice-enabled devices can advantageously continue to use the packet switched (PS) services over the LTE access while being circuit switched (CS) registered in WCDMA.
  • PS packet switched
  • CS circuit switched

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
US12/943,612 2009-12-17 2010-11-10 Keeping packet switched session in lte while circuit switched registered in wcdma Abandoned US20110149852A1 (en)

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US12/943,612 US20110149852A1 (en) 2009-12-17 2010-11-10 Keeping packet switched session in lte while circuit switched registered in wcdma
JP2012543943A JP2013514701A (ja) 2009-12-17 2010-12-06 アクセス分割多重化システム関連アプリケーションにおけるリンク報告リレー
PCT/IB2010/055601 WO2011073847A2 (en) 2009-12-17 2010-12-06 Link report relay in access division multiplexing systems related applications
CA2784099A CA2784099A1 (en) 2009-12-17 2010-12-06 Link report relay in access division multiplexing systems related applications
IN5003DEN2012 IN2012DN05003A (de) 2009-12-17 2010-12-06
JP2012543945A JP2013514702A (ja) 2009-12-17 2010-12-06 Ｗｃｄｍａにおける回線交換登録の間ｌｔｅにおけるパケット交換セッションを保持すること
EP10805334A EP2514230A2 (de) 2009-12-17 2010-12-06 Weiterleitung von verbindungsberichten bei anwendungen im zusammenhang mit zugangsmultiplexsystemen
PCT/IB2010/055609 WO2011073849A1 (en) 2009-12-17 2010-12-06 Keeping packet switched session in lte while circuit switched registered in wcdma
EP10807376A EP2514224A1 (de) 2009-12-17 2010-12-06 Bewahrung einer paketvermittelten lte-sitzung bei leitungsvermittelter wcdma-registrierung
SG2012044301A SG181739A1 (en) 2009-12-17 2010-12-06 Keeping packet switched session in lte while circuit switched registered in wcdma
SG2012043071A SG181650A1 (en) 2009-12-17 2010-12-13 Maintaining parallel registrations in 2g/3g networks and lte for improving set up time of circuit switched fallback
EP10809072.1A EP2514242B1 (de) 2009-12-17 2010-12-13 Parallele registrierungen in 2g/3g-netzen und lte zur verbesserung der einrichtungszeit von leitungsvermitteltem fallback
PCT/IB2010/055778 WO2011073884A1 (en) 2009-12-17 2010-12-13 Maintaining parallel registrations in 2g/3g networks and lte for improving set up time of circuit switched fallback
JP2012543972A JP2013514705A (ja) 2009-12-17 2010-12-14 Ｇｓｍ回線交換呼を確立する場合のｌｔｅにおけるパケット交換セッションの維持
EP10810975A EP2514232A1 (de) 2009-12-17 2010-12-14 Bewahrung eiiner paketvermittelten lte-sitzung bei der herstellung einer leitungsvermittelten gsm-verbindung
JP2012543973A JP5622863B2 (ja) 2009-12-17 2010-12-14 回線交換フォールバック後のｇｓｍとｌｔｅの多重化
SG2012043097A SG181651A1 (en) 2009-12-17 2010-12-14 Maintaining packet switched session in lte when establishing gsm circuit switched call
PCT/IB2010/055820 WO2011073913A1 (en) 2009-12-17 2010-12-14 Gsm and lte multiplexing after circuit switched fallback
EP10810882.0A EP2514231B1 (de) 2009-12-17 2010-12-14 Gsm- und lte-multiplexing nach einem leitungsvermittelten fallback
SG2012044319A SG181740A1 (en) 2009-12-17 2010-12-14 Gsm and lte multiplexing after circuit switched fallback
PCT/IB2010/055816 WO2011073910A1 (en) 2009-12-17 2010-12-14 Maintaining packet switched session in lte when establishing gsm circuit switched call
JP2012543984A JP2013514709A (ja) 2009-12-17 2010-12-16 Ｌｔｅ／ｇｓｍ多重化のためのスケジューリング・マップ
PCT/IB2010/055888 WO2011073946A1 (en) 2009-12-17 2010-12-16 Scheduling map for lte/gsm multiplexing
IN5907DEN2012 IN2012DN05907A (de) 2009-12-17 2010-12-16
SG2012044327A SG181741A1 (en) 2009-12-17 2010-12-16 Scheduling map for lte/gsm multiplexing
EP10813022A EP2514233A1 (de) 2009-12-17 2010-12-16 Planungskarte für lte/gsm-multiplexing?

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US28762709P 2009-12-17 2009-12-17
US28763009P 2009-12-17 2009-12-17
US28757509P 2009-12-17 2009-12-17
US28743809P 2009-12-17 2009-12-17
US28762309P 2009-12-17 2009-12-17
US28795409P 2009-12-18 2009-12-18
US12/943,612 US20110149852A1 (en) 2009-12-17 2010-11-10 Keeping packet switched session in lte while circuit switched registered in wcdma

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US12/943,801 Expired - Fee Related US9252936B2 (en) 2009-12-17 2010-11-10 GSM and LTE multiplexing
US12/943,736 Active 2031-04-28 US8594074B2 (en) 2009-12-17 2010-11-10 Call setup for access division multiplexing
US12/943,770 Abandoned US20110151874A1 (en) 2009-12-17 2010-11-10 Link report relay in access division multiplexing systems
US12/943,612 Abandoned US20110149852A1 (en) 2009-12-17 2010-11-10 Keeping packet switched session in lte while circuit switched registered in wcdma
US12/943,685 Expired - Fee Related US9246655B2 (en) 2009-12-17 2010-11-10 Maintaining packet switched session in LTE when establishing GSM circuit switched call
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US12/943,736 Active 2031-04-28 US8594074B2 (en) 2009-12-17 2010-11-10 Call setup for access division multiplexing
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