MX2008009806A - Interworking for a combined circuit switched (cs) and ip multimedia subsystem (ims) session - Google Patents

Abstract

A wireless system performs interworking of a combined circuit switched (CS) session and an IP multimedia core network subsystem (IMS) session between two users having different content capabilities through an interworking circuit switched (CS) and IMS function (IMS CS IWF). Combinational services implementation for a user supporting IMS and CS and another user supporting only IMS.

Description

METHOD AND APPARATUS TO SUPPORT CIRCUIT-SWITCHED INTERCONNECTION Field of the Invention The present invention relates to wireless communications and, more particularly, to interconnection between the voice / video session of the multimedia core network (IMS) networking subsystem (IMS) of the Internet Protocol (IP) and a combination of a IMS session and one circuit-switched call (CS).

Background The Third Generation Partnership Project (3GPP) is in the process of specifying how to combine a circuit-switched call (CS) and a multimedia core network (IMS) networking subsystem session and, from this way, the interconnection between such services and sessions. There is a need to provide an interconnection between 3GPP IMS voice / video session and a combination of a CS call and an IMS session.

Brief Description The invention relates to the provision of a dual-mode terminal (WTRU) that is capable of supporting both a circuit switched (CS) voice call (e.g., Global System for Mobile Communication (GSM) and a multimedia session). IMS) simultaneously without interruption of any of the sessions / services. The present invention accommodates the increasing demands of CS voice calls based on reliable GSM with the addition of multimedia services. According to the present invention, such services are coordinated by the proportion of an apparatus that performs a Circuit Switched Interconnection (CSIWF) function in the IMS domain and interconnects with the CS and Packet Switched (PS) domains to In order to allow a combined session of CS and IMS while both services are provided independently in a wireless unit while combining both services in the other wireless unit at the same time.

Brief Description of the Drawing (s) A more detailed understanding of the invention can be had from the following description of a preferred embodiment, given by way of example and to be understood in conjunction with the accompanying drawings, wherein: Figure 1 shows a signal flow diagram for a wireless call session with combined sessions of CS and IMF; and Figure 2 shows a signaling sequence diagram between two wireless users for the establishment of a combined session of CS and IMS.

Detailed Description of the Preferred Modality (s) Although the features and elements of the present invention are described in preferred embodiments in particular combinations, each feature or element may be used alone (without the other features and elements of the features). preferred embodiments) or in various combinations with or without other features and elements of the present invention. When referenced in the following, the terminology "wireless transmit / receive unit (WTRU)" includes, but is not limited to, a user equipment (UE), a mobile station, a mobile or fixed subscriber unit, a pager, a cell phone, a personal digital assistant (PDA), a computer or any other type of device capable of operating in a wireless environment. When referenced in the following, a base station (BS) includes, but is not limited to, a Node-B, site controller, access point (AP) or any other type of interconnection device in a wireless environment. The present invention handles the termination of sessions in real time and calls that take into account different domains (CS, IMS) and different capacities of TRU (CSI, IMS VolP, etc.). In summary, a multimedia call is started from the WTRU 12 capable only of IMS where the invitation can include Voice component (V) and a media component (M) with their respective attributes (see Figures 1 and 2) . The receiving WTRU 10 has a unique configuration that prefers voice calls over GSM (CS domain). So, once the IMS side 10b of the receiving WTRU 10 accepts the multimedia call with its components, a CS voice fork is established between the calling subscriber (a WTRU capable of IMS 12) and the called subscriber (a capable WTRU) of IMS and CS 10). The WTRU called 10 accuses of receiving the voice (V) and responds (OK) in multimedia (M) from the TRU calling 12 through the IMS domain, the Media Access Port (MGW) 26"sounds" in the WTRU call 10 and the CS voice call is established when the called WTRU 10 responds. The MGW / MGWF 26 translates the voice call into Voice over IP (VoIP) format. The IMS CSI IWF 20 transports the media content to the IMS capable portion of the WTRU CSI and supports traffic combined with the IMS domain. Figure 1 shows the new apparatus of Interconnection introduced in an IMS domain in order to control the establishment of a CS voice call combined with an IMS multimedia session between two terminals where one is capable of IMS and the other is a simplified signal flow diagram (capable of IMS and CS) dual mode for a wireless call session between two network work transceivers, i.e., a Circuit Switched Interconnect (CSI), i.e., a WTRU capable of CS and IMS 10 and a WTRU capable of IMS 12. WTRU 10 has devices 10a and 10b to respectively support CS and IMS, while WTRU 12 supports IMS. The domain device 20 combines CS domain content with IMS domain content between the WTRU entities 10, 12, as follows. It should be noted that only two (2) WTRUs are shown in the example of Figure 1 for simplicity, it being understood that other WTRUs may participate in the combined session. As shown in Figure 1, and assuming that the session has been established, the IMS SIMS session signal in the CSI WTRU is sent from the IMS 10b Client entity WTRU and then processed by the Radio Access Network ( RAN) 14, the PS 18 domain entity and the CSI Interconnection Function entity (CSI IWF) 20, where it is combined with the CS SCs-Gm signal comprises the interface between the CSI IF 20, which serves as a Control Function Delegate Call Session (P-CSCF) and an IMS 10b portion of the WTRU 10. The IWF 20 employs respectively a GPRS Support Node for Access Port and Service a (GGSN) and a (SGSN) to carry perform their functions as set out below. The CS SCs signal in the CSI WTRU 10, coming from the CS entity 10a, is communicated to the RAN 14 and the domain entity CS 16 over a radio interface Uu / Um. The Uu is the interface between the UTRAN (UMTS Land Radio Access Network) and a WTRU using CDMA, and the CSI IWF 20 entity, which combines the session signal SCs with the IMS SIMS session signal in the domain IMS.

Um reference point aerial interface for the 3GPP2 air interface. It is a broadband broadband interface that uses CDMA (Multiple Access by Code Division) technology and satisfies the requirements of a 3G (Third Generation) system and also the evolution of the current TIA (Industry Association of Te 1 ecomunications) / family of standards 95-B of the EIA (Electronic Industry Association). The combined content signal of CS / IMS SV &M is transmitted in both directions between the two network transceivers, ie, the WTRUs 10 and 12 and made possible by CSI WF 20. Referring to Fig. 2, in where similar elements in Figures 1 and 2 are designated by similar numbers, a signaling sequence diagram is shown between the CSI TRU 10 and the IMS WTRU 12. The combined session is initiated in the Step Si by the WTRU capable of IMS 12, sending an Invitation to the IMS Domain A 24a for a combined session of V and M. The IMS domain is based on the Session Initiation Protocol (SIP) and the Invitation is a SIP message. The Invitation of (V and M) is sent to the IMS domain function B function 24b in S2- The device 24b consults the Location Registration Server Domestic / Subscriber Domestic (HLR / HSS) 22 for location and profile, in S3. It is assumed that WTRU 10, in S o, has been previously turned on and has been registered as a WTRU capable of CSI and assigned an IMS CSI IWF. The HLR / HSS 22, in S4, provides the requested location and profile (capable of CSI) to the device 24b, which sends the Invitation of V &M to the IMS CSI IWF 20 in S 5, which advances the Invitation to the able portion of IMS 10b, in S6. The WTRU 10 accepts the Invitation on S7 and sends a 200 OK (V &M) to IWF 20, on S8. The IWF 20 sends the OK to the domain IMS B in S9, which advances the OK to the IMS domain A 24, in S ioe initiates the establishment of radio holders CS and PS, Bes and B PS in S i oa, using the steps procedure S i ob S oc and S i od, respectively for IWF 20, MGW / MGW 26 and the CSI portion 10a of the WTRU 10. The IMS domain A 24 sends the OK to the WTRU 12 in S u. The CS BCs speech fork is established between the MGW / MGCF 26 CS 10a portion. The speech fork PS B pS is established between the IMS portion 10b and the IMS domain B 24b. The TRU 12, in S 1 2, acknowledges the OK and sends an ACK (V &; M) to IMS 24A, which sends it to IMS 24B, in Si3. IMS 24B advances the ACK (V &M) to IWF 20, in Su, which advances only the ACK (M) to the IMS 10b portion of the WTRU 10 and advances only the ACK (V) IM to MGW / MGCF 26, in S i 6. MGW / MGCF 26 sends a Sound condition to the CS portion 10a of the WTRU 10, at Sx7, in order to initiate the voice portion of the combined session. CS 10a of WTRU 10 answers the Sound in S i 8. WTRU 10 also responds to the ACK (M) message in S i 9. The CS S 20 voice call session extends between the WTRU 10 and MGW / MGCF 26. MGW / MGCF 26 translates the CS voice into Voice over IP (VoIP) format in S 2 1 to provide a VoIP session between MGW / MGCF 26 and IWF 20, in S 2 2. The media content, S23, is established between the IWF 20 and the IMS portion 10b of the WTRU 10. The IWF 20, in S2 4 combines the translated CS voice (ie VoIP) and the means received from the WTRU 10 and sends it to WTRU 12 through the IMS domain 24A, which transports the combined session to and receives it from WTRU 12, at S25 > the combined session, represented by SC that continues until WTRU ends the session, sending an ADIÓS (V &M) to IMS A 24A in S2e, which advances the ADIÓS to IWF 20, in S2i. The IWF 20 sends the ADIÓS to the IMS portion 10a of the WTRU 10 in S28 and MGW / MGCF 26 in S2g, which releases the combined session, in S3o- Although the features and elements of the present invention are described in the preferred embodiments in particular combinations, each feature or element may be used only with the other features and elements of the preferred embodiments or in various combinations with or without other features and elements of the present invention. The methods or flowcharts provided in the present invention may be implemented in a computer program, software or firmware tangibly incorporated into a computer readable storage medium for execution by a general-purpose computer or processor. Examples of computer-readable storage media include a read-only memory (ROM), a random access memory (RAM), a recorder, buffer memory, semi-conductor memory devices, magnetic media, such as hard drives. internal and removable disks, magneto-optical media and optical media such as CD-ROM discs and digital versatile discs (DVDs). Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core. , a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gateway Installation circuits (FPGAs), any other type of integrated circuit (IC) and / or a state machine. A processor in association with software can be used to implement a radio frequency transceiver for use in a wireless transmission / reception unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer. The WTRU can be used in conjunction with modules, implemented in hardware and / or software, such as a camera, a video camera module, a videophone, a speaker, a vibration device, a loudspeaker, a microphone, a television transceiver, a hands-free headset, a keypad, a Bluetooth® module, a frequency-modulated radio (FM) unit, a liquid crystal display (LCD) display unit, an organic light-emitting diode display unit (OLED), a digital music player, a media player, a video game player module, an Internet browser and / or any wireless local area network (LAN) work module.

MODALITIES 1. In a wireless work network that has at least two users, a method comprising: initially establishing a circuit-switched session (CS) between two users that have different content capabilities; establish an IP Multimedia sub-system (IMS) session between the two users; combine the CS session and the IM session; and provide interconnection of the combined session of CS and IMS. 2. The modality 1 method, where the content includes at least voice and multimedia. 3. The method of modalities 1 and 2, where one of the two users invites the IMS session. 4. The method of modalities 1-3, where a second of the two users accepts the IMS invitation. 5. The method of modes 1-4, where the CS and IMS content is combined in the IMS domain using an interconnection function CSI (IWF). 6. The method of embodiments 1-5, further comprising configuring one of the two users as a wireless transmission / reception unit (WTRU) that has multimedia system (IMS) capabilities of Internet Protocol (IP). 7. The method of embodiments 1-6, further comprising configuring one of the two users as a wireless transmit / receive unit (WTRU) having Internet Protocol (IP) multimedia system (IMS) interconnection capabilities and Call Switched by Circuit (CS). 8. The method of modes 1-7, which further comprises configuring a remaining one of the two users as a wireless transmission / reception unit (WTRU) that has interconnection capabilities of the Internet Protocol (IMS) multimedia system (IMS) and circuit-switched call (CS). 9. The modality method 1-8, which further comprises the WTRU having Internet Protocol (IP) multimedia system (IMS) capabilities / initiate an invitation to a combined session of CS and IMS. 10. The method of modes 1-9, further comprising that the WTRU having interconnection capabilities, receives a voice message about the capacity of CS and receives media content on the IMS capability. 11. The method of modes 1-10, further comprising that the WTRU having IMS capabilities, receives a Voice over IP (VoIP) message combined with a media message about the IMS capability. 12. The method of embodiments 1-11, further comprising providing an interconnect function between said two users to receive media and voice content in VoIP format from the WTRU capable of IMS and to provide media content to the IMS capability of the interconnect WTRU and translate the voice content into VoIP format in a format compatible with the CS capability of the interconnect WTRU. 13. The method of embodiments 1-12 further comprising providing an interconnect function between said two users to receive media and CS voice content from the interconnect WTRU and to provide media content to the IMS capability of the WTRU capable of IMS and translate the CS voice content in VoIP format compatible with the IMS capability of a WTRU capable of IMS. 14. The method of embodiments 1-13, further comprising providing an interconnecting function (IWF) between said two users to convey, only toward the IMS capability of the interconnect WTRU, an invitation from the WTRU capable of IMS , transported to the IWF through an IMS domain and receive an acceptance from the interconnection WTRU and transport the Acceptance to the WTRU capable of IMS through the IMS domain.

. The method of modes 1-14, further comprising that the (IWF) establishes the CS voice fork between a media access port (MGW) in said IMS domain and the CS capability of the interconnection TRU. 16. The modality method | 1-15, further comprising that the (IWF) establishes a packet switched media (PS) holder between said IMS capability of the interconnect WTRU and the IMS domain. 17. In a wireless work network that has at least two users, apparatus comprising: a device for initially establishing a circuit-switched session (CS) between two users having different content capabilities; said device further establishing a multimedia IP subsystem (IMS) session between the two users by combining the CS session and the IMS session, thereby providing interconnection of the combined session of CS and IMS. 18. The apparatus of mode 17, where the content includes at least voice and multimedia. 19. The apparatus of modes 17 and 18, wherein a first of two users is configured to provide an invitation to the IMS session. 20. The apparatus of modes 17-19, where a second of the two users is configured to respond to the invitation and sends an acceptance of the IMS invitation. 21. The apparatus of the modes 17-20, wherein the CS and IMS content is combined in the IMS domain using a CSI interconnection function (IWF). 22. The apparatus of modes 17-21, which further comprises one of the users configured as a wireless transmission / reception unit (TRU) that has multimedia system (IMS) capabilities of Internet Protocol (IP) · 23. The apparatus of the modes 17-22, further comprising that one of the two users is configured as a wireless transmission / reception unit (WTRU) that has Internet Protocol (IP) multimedia system interconnection (IMS) capabilities and circuit-switched call (CS). 24. The apparatus of modes 17-23, further comprising that one remaining of the two users is configured as a wireless transmit / receive unit (WTRU) that has multimedia system interconnection (IMS) capabilities of the Internet Protocol ( IP) and circuit switched call (CS). 25. The apparatus of modes 17-24, further comprising that the WTRU having Internet Protocol (IP) multimedia system (IMS) capabilities, is configured to initiate an invitation to a combined session of CS and IMS. 26. The apparatus of embodiments 17-25, further comprising that the WTRU having interconnection capabilities, is configured to receive a voice message about the capacity of CS and to receive media content on the IMS capability. 27. The apparatus of modes 17-26, further comprising that the WTRU having IMS capabilities, is configured to receive a Voice over IP (VoIP) message combined with a media message about the IMS capability. 28. The apparatus of modes 17-27, further comprising providing an interconnect function between said two users configured to receive VoIP format media and content from the WTRU capable of IMS and to provide media content to the IMS capability of the interconnect WTRU and configured to translate voice content into VoIP format in a format compatible with the CS capability of the interconnect WTRU. 29. The apparatus of embodiments 17-28, further comprising providing an interconnect function between said two users, configured to receive means and a CS voice content from the interconnect WTRU and to provide media content to the IMS capability. of the IMS capable WTRU and configured to translate the CS voice content into VoIP format compatible with the IMS capability of the IMS capable WTRU. 30. The apparatus of the modes 17-29, further comprising providing an interconnecting function (IWF) between users configured to transport only the IMS capability of the interconnecting WTRU, an invitation from the WTRU capable of IMS, transported to the IWF through an IMS domain and configured to receive an acceptance from the interconnection WTRU and transport the Acceptance to the IMS capable WTRU through the IMS domain. 31. The apparatus of the modes 17-30, further comprising that the (IWF) being configured, establishes a CS voice fork between a media access port (MGW) in said IMS domain and the CS capability of the WTRU of interconnection. 32. The apparatus of embodiments 17-31, further comprising that the (IWF) being configured, establishes a packet-switched media (PS) holder between said IMS capability of the interconnect WTRU and the IMS domain. 33. The apparatus of embodiments 1-32, further comprising that the (IWF) being configured, conveying termination messages to the interconnect WTRU and the MGW responding to a termination message (ADIÓS) from the WTRU capable of IMS. 34. The apparatus of modes 17-32, further comprising that the configuring MGW, provides a release call message to the interconnecting WTRU that responds to the ADIÓS message from the IWF. 35. A WTRU configured according to any of the modes 1 to 34. 36. A WTRU configured to work with any of the modes 1 to 34. 37. An interconnection function (IWF) configured according to any of the modes 1 to 36. 38. An interconnection function (IWF) configured to work with any of the modes 1 to 36.

Claims (15)

1. RE IVIND ICACIONE S 1. Method to support two different remote users that are characterized by understanding: to invite a first remote user that has switched packet and circuit-switched capabilities, independent, to join a session (SI) that requires the use of both packet switched and circuit switched capabilities; establish circuit-switched forks (BCs) and packet switches (BPS) that respond to the acceptance of the invitation; receive the content of the switched capacity per circuit and the packet switched capacity in an access port; combining circuit switched content and packet switched content for the second remote user, configured to receive the combined content (S25). The method of claim 1, characterized in that the circuit-switched content and the packet-switched content are respectively voice and multimedia. The method of claim 1, characterized in that the invitation is sent to the switched packet capacity (S7). The method of claim 1, further characterized by comprising: using an interconnection function configured to respectively send the circuit switched, combined content, and the packet switched content, received from said second remote user, independently of said switched capacity per circuit and packet switched capacity, respectively. The method of claim 1, further characterized by receiving voice content from said circuit switched capacity at said access port; and translate said voice content into Voice over Internet Protocol (S21). The method of claim 1, further characterized by comprising setting up the packet switched radio (BPS) fork between a first Internet Protocol Multimedia system in communication with said second remote user and a second Protocol Multimedia system in Internet in communication with the switched capacity per circuit of said first remote user. 7. Apparatus for supporting two different remote users, characterized by comprising: a first of said users configured as a circuit switched interconnection device with packet switched means and separated to handle respectively different content; a first fork function that supports a first type of content coming from a switched capacity per circuit, independently, of one of said remote users first; a second fork function that supports a second type of content from a packet switched capacity, independent of said first of said remote users; an access port that combines the content types, first and second, received from said first remote user; provide the combined content types, first and second, to one second of remote users, configured to receive the content confined. Apparatus of claim 7, wherein the first and second content types are characterized as being, respectively, voice and multimedia. The apparatus of claim 7 / wherein the invitation is sent to the switched packet capacity. Apparatus of claim 7, further characterized by comprising: an interconnection function configured to separate said combined types of contents, first and second, from said second remote user. The apparatus of claim 10, wherein said access port for translating said voice content from the first remote user into Voice over Internet Protocol (S21) and combining the Voice over Internet Protocol with the content coming from the switched capacity of package to be used by the second remote user. Apparatus of claim 7, wherein the holders are circuit-switched radio forks and packet switches, (BCs) and (BPS). 13. Apparatus of claim 12, wherein the circuit-switched radio fork between said access port and the circuit switched capacitance of the first remote user (Bcs) · 14. Apparatus of claim 12, wherein the radio fork is switched by package between a first Internet Protocol Multimedia function in communication with said second remote user and a second Internet Protocol Multimedia function in communication with the circuit switched capability of said first remote user. 15. Apparatus of claim 10, further characterized by separating the types of voice and multimedia content, received from the second remote user; convert voice content from VoIP into preparatory voice to independently send voice and multimedia content to the first remote user.