# US 2019/0174003 A1 · Providing voice call support in a network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174003 A1 - Document ID: US20190174003A1 - Status: Published application - Kind: A1 - Application number: 16/322,155 - Filed: 2017-07-28 - Published: 2019-06-06 - Earliest claimed: 2010-08-02 - Assignees: Nokia Solutions and Networks Oy - Applicants: Nokia Solutions and Networks Oy - Inventors: Devaki CHANDRAMOULI; Curt WONG - Web page: https://patentgrep.com/patent/US20190174003A1 ## CPC - H04L 67/125: involving control of end-device applications over a network - H04M 3/58: Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party (substation line holding circuits H04M1/80) - H01F 7/0278: {for generating uniform fields, focusing, deflecting electrically charged particles (for magnetic separation by Lorentz force B03C1/023; specially adapted for NMR applications G01R33/383)} - H01J 37/3408: {Planar magnetron sputtering} - H01J 37/3461: {Means for shaping the magnetic field, e.g. magnetic shunts} - H04L 65/1016: IP multimedia subsystem [IMS] - H04W 36/0022: {for transferring data sessions between adjacent core network technologies} - H04W 48/20: Selecting an access point - H04W 60/00: Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration - H04W 76/10: Connection setup - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04M 2207/18: wireless networks - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - Y04S 40/18: Network protocols supporting networked applications, e.g. including control of end-device applications over a network - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## Abstract Various communication systems may benefit from improved voice call support. For example, it may be helpful for a user equipment in a first radio access technology that may not support voice calls to initiate a voice call with a second radio access technology. A method includes initiating a voice call between a user equipment to an entity in a second radio access technology cell. The user equipment is located in a first radio access technology cell. The method also includes registering the user equipment with the second radio access technology cell. In addition, the method includes conducting the voice call with the entity via the second radio access technology cell. ## Claims ### Claim 1 A method, comprising: initiating a voice call between a user equipment to an entity in a second radio access technology cell, wherein the user equipment is located in a first radio access technology cell; registering the user equipment with the second radio access technology cell; and conducting the voice call with the entity via the second radio access technology cell. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first radio access technology does not support voice call. ### Claim 3 (depends on 1) The method according to claim 1, wherein the first radio access technology cell instructs the user equipment to move over to the second radio access technology cell in order to receive or initiate a voice call. ### Claim 4 (depends on 1) The method according to claim 1, further comprising at least one of: receiving an internet protocol address from the second radio access technology cell, wherein the internet protocol address is used to connect the voice call between the user equipment and the entity in the second radio access technology cell; or receiving another internet protocol address from the first radio access technology cell, wherein the another internet protocol address is used to connect the voice call between the user equipment and the entity in the second radio access technology cell. ### Claim 5 (depends on 4) The method according to claim 4, wherein at least one of the internet protocol address or the another internet protocol address is not changed when moving from the first radio access technology cell and the second radio access technology cell. ### Claim 6 (depends on 1) The method according to claim 1, wherein the first radio access technology comprises a fifth generation wireless system, and wherein the second radio access technology comprise a long term evolution network. ### Claim 7 (depends on 1) The method according to claim 1, further comprising: initiating the voice call with the entity in the first radio access technology cell, after attempting to establish the voice call using the second radio access technology cell. ### Claim 8 (depends on 7) The method according to claim 7, wherein the initiating comprises an initiation request that is redirected to the second radio access technology cell based on a state of the user equipment, wherein the state is at least one of an active state of the user equipment or an idle state of the user equipment. ### Claim 9 (canceled) ### Claim 10 (depends on 1) The method according to claim 1, wherein the registering of the user equipment includes registering with an evolved packet system and an internet protocol multimedia subsystem. ### Claim 11 (depends on 1) The method according to claim 1, wherein a voice service is provided over the second radio access technology, and a data service is provided over the first radio access technology. ### Claim 12 (depends on 1) The method according to claim 1, wherein the user equipment is connected to a base station of the first radio access technology, wherein the base station of the first radio access technology is anchored to another base station of the second radio access technology, and wherein the base station of the second radio access technology is registered with a network core of the first radio access technology or wherein the base station of the second radio access technology is registered with another network core of the second radio access technology. ### Claim 13 A method, comprising: receiving a registration request at a network entity in a second radio access technology cell from a user equipment located in a first radio access technology cell; receiving an initiation request for a voice call from the user equipment in the first radio access technology cell; and delivering the voice call to an entity in the second radio access technology cell. ### Claim 14 (depends on 13) The method according to claim 13, wherein the first radio access technology does not support voice call. ### Claim 15 (depends on 13) The method according to claim 13, wherein the delivering of the voice call is performed after the user equipment is registered with the second radio access technology cell. ### Claim 16 (depends on 13) The method according to claim 13, further comprising: instructing the user equipment to move over from the first radio access technology cell to the second radio access technology cell. ### Claim 17 (depends on 13) The method according to claim 13, further comprising at least one of: sending the user equipment an internet protocol address from the second radio access technology; or sending the user equipment another internet protocol address from the first radio access technology. ### Claim 18 (depends on 17) The method according to claim 17, wherein at least one of the internet protocol address or the another internet protocol address is not changed when moving from the first radio access technology cell and the second radio access technology cell. ### Claim 19 (depends on 13) The method according to claim 13, wherein the first radio access technology includes a fifth generation wireless system, and the second radio access technology includes a long term evolution network. ### Claim 20 (depends on 13) The method according to claim 13, further comprising at least one of: registering the user equipment with at least one of the second radio access technology or the first radio access technology and an internet protocol multimedia subsystem; or registering the user equipment with the internet protocol multimedia subsystem using a internet protocol address assigned by the first radio access technology or another internet protocol address by the second radio access technology. ### Claim 21 (depends on 13) The method according to claim 13, further comprising: receiving a radio resource control establishment request or a service request, wherein the radio resource control establishment request or the service request comprises a course code. ### Claim 22 (depends on 13) The method according to claim 13, wherein the user equipment is connected to a base station of the first radio access technology, wherein the base station of the first radio access technology is anchored to another base station of the second radio access technology, and wherein the base station of the second radio access technology is registered with a network core of the first radio access technology or wherein the base station of the second radio access technology is registered with another network core of the second radio access technology. ### Claim at position 23 -29. (canceled) ### Claim 30 An apparatus, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform initiating a voice call between a user equipment to an entity in a second radio access technology cell, wherein the user equipment is located in a first radio access technology cell; registering the user equipment with the second radio access technology cell; and conducting the voice call with the entity via the second radio access technology cell. ### Claim 31 (depends on 1) A computer program product embodied on a non-transitory computer-readable medium encoding instructions that, when executed in hardware, perform a process according to claim 1. ### Claim 32 (canceled) ### Claim 33 (depends on 13) A computer program product embodied on a non-transitory computer-readable medium encoding instructions for performing a process according to claim 13. ### Claim 34 An apparatus, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform receiving a registration request at a network entity in a second radio access technology cell from a user equipment located in a first radio access technology cell; receiving an initiation request for a voice call from the user equipment in the first radio access technology cell; and delivering the voice call to an entity in the second radio access technology cell.