WO2012130177A1 - 语音业务的实现方法及终端 - Google Patents
语音业务的实现方法及终端 Download PDFInfo
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- WO2012130177A1 WO2012130177A1 PCT/CN2012/073433 CN2012073433W WO2012130177A1 WO 2012130177 A1 WO2012130177 A1 WO 2012130177A1 CN 2012073433 W CN2012073433 W CN 2012073433W WO 2012130177 A1 WO2012130177 A1 WO 2012130177A1
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- network
- terminal
- mme
- voice service
- cell
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- 238000000034 method Methods 0.000 title claims abstract description 93
- 230000009977 dual effect Effects 0.000 claims abstract description 42
- 238000005259 measurement Methods 0.000 claims description 63
- 230000004044 response Effects 0.000 claims description 23
- 230000008569 process Effects 0.000 description 39
- 102000018059 CS domains Human genes 0.000 description 7
- 108050007176 CS domains Proteins 0.000 description 7
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000011664 signaling Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
- H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
-
- 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
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- 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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and a terminal for implementing a voice service. Background technique
- CS Circuit Switched
- Packet Switched, packet switched domain network For example, the PS domain in an LTE network is suitable for transmitting high speed data services, and the CS domain in a GSM or UMTS network is suitable for voice calls.
- the CS radio module and the PS radio module of the UE may be simultaneously opened, and the UE simultaneously uses the PS module for data services and the CS module for voice services.
- the transceiver of the CS domain network and the transceiver corresponding to the PS domain network need to be simultaneously turned on and kept in operation, and are not optimized, which causes the terminal UE to consume a large amount of power. Summary of the invention
- Embodiments of the present invention provide a method and a terminal for implementing a voice service, which are used to reduce power consumption of a terminal and achieve energy saving.
- an embodiment of the present invention provides a method for implementing a voice service, including: a cell in which a terminal resides in a 4G network; The terminal is jointly attached to the 2G/3G network and the 4G network by sending a joint attach message or a joint location update message to the mobility management entity MME in the 4G network, where the CS transceiver of the terminal is in a closed state;
- the terminal When the voice service needs to be performed, the terminal sends an extended service request message to the MME, so that the MME indicates that the base station of the 4G network needs to trigger the CS rollback;
- the terminal Receiving, by the base station, a notification sent by a base station of the 4G network to measure the 2G/3G network; the terminal opens the CS transceiver, and measures the 2G/3G network according to the notification; As a result, voice services are performed on the 2G/3G network.
- a terminal the terminal is a dual mode terminal, and the terminal includes:
- a camping unit configured to cause the terminal to camp on a cell of a 4G network
- An attaching unit configured to, by sending a joint attach message or a joint location update message to a mobility management entity MME in a 4G network, to jointly attach the terminal to a 2G/3G network and the 4G network, where the terminal sends and receives CS The machine is in the off state;
- a first sending unit configured to send an extended service request message to the MME when the voice service is required, so that the MME indicates that the base station of the 4G network needs to trigger a CS fallback;
- a receiving unit configured to receive, by the base station of the 4G network, a notification for measuring the 2G/3G network
- An opening unit configured to open the CS transceiver, and measure the 2G/3G network according to the notification
- a voice unit configured to perform voice service on the 2G/3G network according to the measured result.
- an embodiment of the present invention further provides a method for implementing a voice service, including: a terminal camping on a cell of a 2G/3G network and a cell of a 4G network at the same time;
- the terminal sends a joint attach message or a joint location update message to the mobility management entity MME in the 4G network to complete joint attachment of the terminal to the 2G/3G network and the 4G network; when voice service is not required, The terminal continues to camp on the cell of the 2G/3G network; When the voice service needs to be performed, the terminal performs the voice service through the 2G/3G network.
- a terminal the terminal is a dual mode terminal, and the terminal includes:
- a camping unit configured to enable the terminal to simultaneously reside in a cell of a 2G/3G network and a cell of a 4G network;
- An attaching unit configured to send a joint attach message or a joint location update message to a mobility management entity MME in a 4G network, to complete joint attachment of the terminal to the 2G/3G network and the 4G network;
- the camping unit is further configured to maintain a resident state of the terminal in a cell of the 2G/3G network when voice service is not required;
- a voice unit configured to perform the voice service over the 2G/3G network when voice service is required.
- the method and the terminal for implementing the voice service provided by the embodiment of the present invention keep the PS transceiver in the dual-mode terminal in a working state when the voice service is not required, and turn off or keep the CS transceiver in the static state. In this way, the terminal power consumption of the voiceless service can be reduced. Further, since the terminal has been jointly attached to the 2G/3G network when the voice service is not required, the terminal can complete the service quickly when the voice service needs to be performed. Switch. By using the solution provided in the embodiment of the present invention, the power consumption of the terminal can be reduced to achieve the purpose of energy saving, and the process of accessing the 2G/3G network for voice service can be accelerated.
- FIG. 2 is a schematic structural diagram of a terminal according to Embodiment 1 of the present invention.
- FIG. 3 is a signaling flowchart of a method for implementing a voice service according to Embodiment 2 of the present invention
- FIG. 5 is a signaling flowchart of a method for implementing a voice service according to Embodiment 4 of the present invention.
- FIG. 6 is a schematic structural diagram of a terminal in Embodiment 5 of the present invention.
- FIG. 7 is a first implementation manner of a voice unit of the terminal in FIG. 6;
- FIG. 9 is a third implementation manner of the voice unit of the terminal in FIG. 6;
- FIG. 10 is a flowchart of a method for implementing a voice service according to Embodiment 6 of the present invention.
- FIG. 11 is a schematic structural diagram of a terminal in Embodiment 6 of the present invention.
- FIG. 12 is a flowchart of a method for implementing a voice service according to Embodiment 7 of the present invention.
- FIG. 13 is a signaling flowchart of a UE attaching to a 2G/3G cell according to Embodiment 7 of the present invention
- FIG. 14 is a signaling flowchart of a UE performing 2G/3G cell reselection according to Embodiment 7 of the present invention
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the method for implementing a voice service provided in the embodiment of the present invention includes the following steps: 101.
- the terminal resides in a cell of the 4G network.
- the terminal sends a joint attach message or a joint location update message to an MME (Mobile Switching Entity) in the 4G network, and is jointly attached to the 2G/3G network and the 4G network, where the terminal sends and receives CS
- the machine for example, 2G/3G transceiver
- the terminal jointly attaches or jointly updates the location to the 2G/3G network and the 4G network, specifically refers to the terminal joint attachment or joint location update to the 2G/3G circuit-switched CS network and the 4G network.
- the terminal sends an extended service request message (the extended service request) to the MME, so that the MME indicates that the base station of the 4G network needs to trigger a CS fallback.
- the extended service request the extended service request
- the terminal receives a notification sent by a base station of the 4G network to measure the 2G/3G network.
- the terminal opens the CS transceiver, and measures the 2G/3G network according to the notification.
- the terminal performs voice service on the 2G/3G network according to the measured result.
- the embodiment provides a terminal for implementing a voice service;
- the terminal is a dual mode terminal, as shown in FIG. 2, the terminal includes:
- a camping unit 21 configured to cause the terminal to camp on a cell of a 4G network
- the attaching unit 22 is configured to jointly attach the terminal to the 2G/3G network and the 4G network by sending a joint attach message or a joint location update message to the mobility management entity MME in the 4G network, where the terminal CS The transceiver is in the off state;
- the first sending unit 23 is configured to send an extended service request message to the MME when the voice service needs to be performed, so that the MME indicates that the base station of the 4G network needs to trigger the CS fallback;
- the receiving unit 24 is configured to receive, by the base station of the 4G network, a notification for measuring the 2G/3G network;
- the opening unit 25 is configured to open the CS transceiver, and measure the 2G/3G network according to the notification;
- the voice unit 26 is configured to perform voice service on the 2G/3G network according to the measured result.
- the method and the terminal for implementing the voice service provided by the embodiment of the present invention keep the PS transceiver in the dual-mode terminal in a working state when the voice service is not required, and turn off the CS transceiver therein, thereby reducing the voiceless service.
- the terminal power consumption of the terminal further, since the terminal has been jointly attached to the 2G/3G network when the voice service is not required, the terminal can quickly complete the service switching when the voice service needs to be performed.
- the 2G network may be a GSM (Global System for Mobile Communications) network
- the 3G network may be a WCDMA (Wideband Code Division Multiple Access) network
- 4G The network may be an LTE (Long Term Evolution) network or an LTE-A (Long Term Evolution Advance) network.
- Embodiment 2 A CS transceiver and a PS transceiver are simultaneously provided in the same.
- the LTE network is taken as an example, and the PS transceiver in the terminal (in this embodiment, the 4G transceiver, such as an LTE transceiver) is always on and in working state, and the CS transceiver is in the working state. (2G/3G transceivers can be turned off in this embodiment).
- the method for implementing a voice service specifically includes the following steps:
- the terminal UE camps on a cell of the LTE network.
- the terminal UE sends a joint attach message to the MME in the LTE network, and jointly attaches To the LTE network and the 2G/3G network; wherein the 2G/3G transceiver of the terminal UE is in the off state.
- the UE sends an extended service request message (the extended service request) to the MME in the LTE network, so that the MME indicates that the base station of the LTE network needs to trigger the CSFB (Circuit Switch Fall Back). process.
- the extended service request the extended service request message
- the MME indicates that the base station of the LTE network needs to trigger the CSFB (Circuit Switch Fall Back).
- the MME sends a context modification message to the ENB (Evolved NodeB) to indicate that the ENB performs CS fallback.
- the context modification message may also carry a status indicating that the current CSFB process is based on dual. Instructions for the CSFB process in radio mode.
- the MME Before performing step 305, the MME needs to first know whether the UE has dual radio capability. Specifically, the radio capability information can be sent by the UE to the ENB, and the dual radio capability indication information is added to the radio capability. After the radio capability is obtained, the UE can know whether the UE has the dual radio capability; or
- the MME informs the MME whether it has the dual radio capability. For example, the UE sends the network capability information to the MME, and the indication information of the dual radio capability is enhanced in the network capability. After the MME learns the dual radio capability of the UE, Then notify ENB.
- the ENB sends a measurement control message to the UE, to instruct the UE to measure a cell of the 2G/3G network (hereinafter referred to as a 2G/3G cell).
- the measurement control message includes 2G/3G cell information or frequency group information, where the 2G/3G cell information is used to indicate a certain or some 2G/3G cell that the terminal needs to measure, and the frequency group information is used to indicate the terminal needs. Measuring 2G/3G cells communicating on one or some frequencies; meanwhile, the measurement gap may not be carried in the measurement control message, thereby indicating that the UE needs to open the 2G/3G transceiver to measure the 2G/3G cell .
- the UE After receiving the measurement control message, the UE turns on the 2G/3G transceiver, and performs measurement on the 2G/3G network according to the measurement control message.
- the UE After the 2G/3G transceiver is turned on, the UE first camps on the current attached according to the result of the measurement. The 2G/3G cell is then subjected to CS voice service in the 2G/3G cell. Specifically, the implementation process is as follows, step 307 to step 309.
- the UE sends a measurement report to the base station ENB in the LTE network, where the UE carries the measurement result after the UE performs measurement on the 2G/3G network.
- the ENB selects a target cell according to the measurement result, and sends a system message of the target cell.
- target cell system information is sent to the UE.
- the UE camps on the target cell of the 2G/3G network according to the system message, and performs a normal MO (Mobile Originating call) or MT (Mobile Terminating call) call procedure.
- MO Mobile Originating call
- MT Mobile Terminating call
- the target cell camped on the 2G/3G network refers to a system message that the terminal reads the target cell, and starts a cell selection and a cell reselection function.
- the UE also needs to send a joint location update message to the MME in the 4G network (LTE network) before performing the language service.
- the location area is updated so that the UE is jointly attached to the currently located 2G/3G network and 4G network.
- the method for implementing the voice service provided by the embodiment of the present invention only opens the PS transceiver in the terminal when the voice service is not needed, and the CS transceiver is in the off state, because the power consumption of the CS transceiver is reduced, Reduce the overall power consumption of the terminal; when voice services are required,
- the UE After receiving the measurement indication message sent by the ENB, that is, the measurement control message, the UE opens the CS transceiver in the terminal to ensure normal operation of the voice service.
- the power consumption of the terminal can be reduced, the purpose of energy saving is achieved, and the user maintains a high-speed data service experience while performing voice service.
- Embodiment 3 A CS transceiver and a PS transceiver are simultaneously provided and can work simultaneously.
- the LTE network is taken as an example, and the PS transceiver in the terminal (in this embodiment, the 4G transceiver, such as an LTE transceiver) is always on and in working state, and the CS transceiver is in the working state. (2G/3G transceivers can be turned off in this embodiment).
- the method for implementing a voice service specifically includes the following steps:
- the terminal UE camps on a cell of the LTE network.
- the terminal UE jointly attaches to the LTE network and the 2G/3G network by sending a joint attach message to the MME in the LTE network.
- the 2G/3G transceiver of the terminal UE is in a closed state.
- the UE When a voice service is required (the UE is the calling party or the UE receives the CS paging message to be called), the UE sends an extended service request message (the extended service request) to the MME in the LTE network, so that the MME indicates The base station of the LTE network needs to trigger the CS fallback process.
- the extended service request the extended service request
- the MME sends a context modification message to the ENB to indicate that the ENB performs a CS fallback.
- the context modification message may also carry a CS fallback indicating that the current CS fallback process is based on the dual radio mode. Instructions for the process.
- the MME Before performing step 405, the MME needs to first know whether the UE has dual radio capability. Specifically, the radio capability information can be sent by the UE to the ENB, and the dual radio capability indication information is added to the radio capability. After the radio capability is obtained, the UE can know whether the UE has the dual radio capability; or
- the MME informs the MME whether it has the dual radio capability. For example, the UE sends the network capability information to the MME, and the indication information of the dual radio capability is enhanced in the network capability. After the MME learns the dual radio capability of the UE, Then notify ENB.
- the ENB sends a measurement control message to the UE, to instruct the UE to measure a cell of the 2G/3G network (hereinafter referred to as a 2G/3G cell).
- the measurement control message includes 2G/3G cell information or frequency group information, where the 2G/3G cell information is used to indicate a certain or some 2G/3G cell that the terminal needs to measure, and the frequency group information is used to indicate the terminal needs. Measure at some or A 2G/3G cell that communicates on some frequencies; at the same time, the measurement gap may not be carried in the measurement control message, thereby indicating that the UE needs to open the 2G/3G transceiver to measure the 2G/3G cell.
- the UE After receiving the measurement control message, the UE turns on the 2G/3G transceiver, and performs measurement on the 2G/3G network according to the measurement control message.
- the CS transceiver that is, the opening process of the 2G/3G transceiver, can be completed.
- the UE After the 2G/3G transceiver is turned on, the UE performs the specific implementation process of the CS voice service in the 2G/3G cell according to the measurement result, as in steps 407 to 415.
- the UE sends a measurement report to the base station ENB of the LTE network, where the UE carries the measurement result after the UE performs measurement on the 2G/3G network.
- the ENB selects the target cell of the 2G/3G network based on the measurement results in the measurement report.
- the ENB sends a handover request message to the MME in the LTE network, where the handover request message may include an indication of whether to perform a dual radio handover.
- the MME sends a handover message, a forward relocation request, to a GPRS service support node (SGSN) of the 2G/3G network.
- SGSN GPRS service support node
- the MME sends the
- the GPRS pre-relocation request also includes a dual radio indication, and the MME does not release the bearer context.
- a new message that can be defined in this embodiment is used to indicate the dual radio handover.
- the SGSN sends a handover request message, a relocation request, to a BSC (Base Station Controller) / RNC (Radio Network Controller).
- the RAB Radio Access Bear
- the BSC/RNC returns a handover response message to the SGSN, a relocation response.
- the SGSN returns a forward relocation response to the MME. 413.
- the MME sends a handover response message, a handover command, to the ENB. 414.
- the ENB sends handover response information, handover information, to the UE.
- the ENB sends a handover message using a new RRC (Radio Resource Control) message without affecting the LTE communication connection between the ENB and the UE.
- RRC Radio Resource Control
- the UE establishes a new RRC connection in the 2G/3G network, and then completes the normal MO or MT process through the newly established RRC connection by using the 2G/3G transceiver inside the UE.
- step 415 the UE establishes a new RRC connection in the 2G/3G network to complete the voice service, and does not affect the data service in the LTE network; therefore, the SGSN does not require the RNC/BSC to establish a dedicated transport channel, and the SGSN does not.
- the update message is sent to the SGW, that is, the SGSN only establishes a signaling bearer on the BSC/RNC side without updating the user plane to the SGW.
- the method for implementing the voice service provided by the embodiment of the present invention only opens the PS transceiver in the terminal when the voice service is not needed, and the CS transceiver is in the off state, because the power consumption of the CS transceiver is reduced, Reduce the power consumption of the terminal as a whole;
- the voice service is completed by constructing a new RRC connection in the CS domain.
- the PS domain service does not actually switch to the 2G/3G network, but continues to remain in the LTE network. That is to say, in this process, a 2G/3G RRC connection is established by doing a fake PS handover. Since the data service is always maintained in the LTE network, the solution in this embodiment does not involve the network switching of the data service. Therefore, this implementation can enable the UE to perform CS voice while maintaining a good experience of high-speed data services.
- the ENB may also decide whether to initiate a true PS handover according to its own load. For example, when the ENB load is large, a true PS handover may be initiated, and then sent to the MME. The dual radio indication is not carried in the GPRS pre-relocation request.
- Embodiment 4 A CS transceiver and a PS transceiver are simultaneously provided in the same.
- the LTE network is taken as an example, and the PS transceiver in the terminal (in this embodiment, the 4G transceiver, such as an LTE transceiver) is always on and in working state, and the CS transceiver is in the working state. (2G/3G transceivers can be turned off in this embodiment).
- the method for implementing a voice service specifically includes the following steps:
- the terminal UE camps on a cell of the LTE network.
- the terminal UE jointly attaches to the LTE network and the 2G/3G network by sending a joint attach message to the MME in the LTE network.
- the 2G/3G transceiver of the terminal UE is in a closed state.
- the UE sends an extended service request message (extending service request) to the MME in the LTE network, so that the MME indicates that the base station of the LTE network needs to trigger the CS rollback process.
- extended service request extending service request
- the MME sends a context modification message to the ENB to indicate that the ENB performs CS fallback.
- the context modification message may also carry a CS fallback indicating that the current CS fallback process is based on the dual radio mode. Instructions for the process.
- the MME Before performing step 505, the MME needs to first know whether the UE has dual radio capability. Specifically, the radio capability information can be sent by the UE to the ENB, and the dual radio capability indication information is added to the radio capability. After the radio capability is obtained, the UE can know whether the UE has the dual radio capability; or
- the MME informs the MME whether it has the dual radio capability. For example, the UE sends the network capability information to the MME, and the indication information of the dual radio capability is enhanced in the network capability. After the MME learns the dual radio capability of the UE, Then notify ENB. 505.
- the ENB sends a measurement control message to the UE, to instruct the UE to measure a cell of the 2G/3G network (hereinafter referred to as a 2G/3G cell).
- the measurement control message includes 2G/3G cell information or frequency group information, where the 2G/3G cell information is used to indicate a certain or some 2G/3G cell that the terminal needs to measure, and the frequency group information is used to indicate the terminal needs. Measuring 2G/3G cells communicating on one or some frequencies; meanwhile, the measurement gap may not be carried in the measurement control message, thereby indicating that the UE needs to open the 2G/3G transceiver to measure the 2G/3G cell .
- the UE After receiving the measurement control message, the UE turns on the 2G/3G transceiver, and performs measurement on the 2G/3G network according to the measurement control message.
- the CS transceiver that is, the opening process of the 2G/3G transceiver, can be completed.
- the UE After the 2G/3G transceiver is turned on, the UE performs CS voice service in the 2G/3G cell according to the measurement result.
- the implementation process is as follows, step 507 to step 514.
- the UE sends a measurement report to the base station ENB of the LTE network, where the UE carries the measurement result after the UE performs measurement on the 2G/3G network.
- the ENB selects the target cell of the 2G/3G network based on the measurement results in the measurement report.
- ENB triggers the switching process from PS domain to CS domain (PS to CS). See the following steps for details:
- the ENB sends a handover request message to the MME in the LTE network.
- the MME sends a PS to CS handover message to the MSC (Mobile Switching Center).
- MSC Mobile Switching Center
- the MME may indicate in the message that the call does not need to be initiated or contains an empty number, so that the MSC does not initiate a call.
- the MSC sends a handover request to the BSC/RNC, and the BSC/RNC responds to the handover response message.
- the BSC/RNC reserves resources for the subsequent CS voice service. 511.
- the MSC responds to the PS to CS handover response message to the MME.
- the MME sends a handover command to the ENB.
- the ENB sends handover information to the UE.
- the handover information may be carried in a new RRC message, so that the UE and the ENB do not actually disconnect the LTE air interface.
- the UE switches to the 2G/3G network, accesses the target cell of the 2G/3G network, and continues the call according to the normal CS MO or MT process.
- the MSC Since the BSC/RNC has reserved resources for the CS voice service in step 510, and the transport channel has been established, the MSC does not need to perform RAB (Radio Access Bear) again when completing the normal MO or MT process in step 514. Load).
- RAB Radio Access Bear
- the extended service request message may also carry the called number in step 503, and the MME switches the message through the PS to CS in step 509.
- the called number is delivered to the MSC, and then the MSC can start calling the terminal corresponding to the called number.
- the method for implementing the voice service provided by the embodiment of the present invention only opens the PS transceiver in the terminal when the voice service is not needed, and the CS transceiver is in the off state, because the power consumption of the CS transceiver is reduced, Reduce the power consumption of the terminal as a whole;
- a PS to CS handover process is triggered by the ENB, and an RRC connection and a transport channel are established in the handover process, and the UE is ready to switch to the 2G/3G network. Accelerate the access speed of the UE in the 2G/3G network, so that the terminal can continue the service on the high-bandwidth wireless network such as LTE while rapidly performing CS voice.
- the solution in this embodiment can also be applied to a terminal of a single radio (only one wireless transceiver can be in a working state at any time) mode. If it is used for a single radio terminal, the step 504 does not carry the dual radio CSFB indication, and in step 505, the measurement gap is carried. In step 506, the measurement gap is used to measure the 2G/3G cell and the step is optional. If step 506 is not performed, step 507 is not executed and the Mobility From EUTRAN command is used in step 513. The process of the UE turning on the 2G/3G transceiver can be performed after step 513. At this time, the handover information in step 513 may be sent to the UE through the Mobility From Eutran message, and the UE disconnects the LTE connection with the ENB after step 513.
- the joint attachment described in the embodiment of the present invention enables the paging message of the 2G/3G CS network to be sent on the 4G network, the terminal does not receive the paging message in the 2G/3G cell, the short message is sent and received through the 4G network, and then the 4G network
- the MME forwards the MSC to the 2G/3G CS network.
- the MSC determines that the UE has accessed from the 2G/3G cell, it considers that the UE is no longer in the joint attachment state. At this time, the short message and the voice service are sent to the UE through the 2G/3G network cell.
- the method by which the MSC determines that the UE has accessed from 2G/3G is that the UE receives the message from the 2G/3G access network.
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- the embodiment of the present invention further provides a terminal that can be used to implement the above method.
- the terminal provided in the embodiment of the present invention is a dual-mode terminal, in which a CS transceiver and a PS transceiver are simultaneously disposed. As shown in FIG. 6, the terminal includes:
- a camping unit 61 configured to cause the terminal to camp on a cell of a 4G network
- the attaching unit 62 is configured to jointly attach the terminal to the 2G/3G network and the 4G network by sending a joint attach message or a joint location update message to the mobility management entity MME in the 4G network, where the terminal CS The transceiver is in the off state;
- a first sending unit 63 configured to send an extended service request message to the MME when the voice service is required, so that the MME indicates that the base station of the 4G network needs to trigger the CS fallback; and the receiving unit 64 is configured to receive the A notification sent by the base station of the 4G network to measure the 2G/3G network;
- the opening unit 65 is configured to open the CS transceiver, and measure the 2G/3G network according to the notification;
- the voice unit 66 is configured to perform voice service on the 2G/3G network according to the measured result.
- the voice unit 66 is specifically configured to camp on a cell of the 2G/3G network according to the measurement result, and perform a CS voice service; further,
- the voice unit 66 may be as shown in FIG. 7, and includes:
- a first sending module 71 configured to send a measurement report to a base station of the 4G network
- the first receiving module 72 is configured to receive, by the base station of the 4G network, a system message of a target cell of the 2G/3G network selected by the base station of the 4G network according to the measurement report;
- the first voice module 73 is configured to camp on the target cell of the 2G/3G network according to the system message, and perform the CS voice service.
- the voice unit may also be as shown in FIG. 8, including: a second sending module 81, configured to send a measurement report to a base station of the 4G network, so that the
- the base station of the 4G network selects the target cell of the 2G/3G network and causes the 4G network to trigger the switching of the dual transceiver mode.
- the process of switching the dual-transmission mode in the 4G network may be referred to in the third embodiment. Step 408 to step 415, and details are not described herein;
- the second receiving module 82 is configured to receive the handover response information sent by the base station of the 4G network, and the second voice module 83 is configured to access the target cell of the 2G/3G network and perform CS voice service.
- the voice unit may also be as shown in FIG. 9, including: a third sending module 91, configured to send a measurement report to a base station of the 4G network, so that the
- the base station of the 4G network selects the target cell of the 2G/3G network and causes the 4G network to trigger a PS to CS handover.
- the process of performing the PS to CS handover on the 4G network may refer to step 508 to step in the fourth embodiment. 514, no longer repeat here;
- the third receiving module 92 is configured to receive the handover response information sent by the base station of the 4G network, and the third voice module 93 is configured to access the target cell of the 2G/3G network and perform a CS voice service.
- the terminal in this embodiment further includes: a second sending unit, configured to send wireless capability information to the base station of the 4G network, where the wireless capability information includes dual-transmit dual-capacity capability indication information of the current terminal; or
- a third sending unit configured to send network capability information to a core network of the 4G network, where the network capability information includes dual-transmit dual-capacity capability indication information of the terminal, so that the core network of the 4G network The dual-transmitting dual-issue capability of the terminal is notified to the base station of the 4G network.
- the process of implementing the voice service by using the terminal in the embodiment of the present invention can refer to the description in the second embodiment, the third embodiment, and the fourth embodiment, and is not described herein.
- the terminal for implementing the voice service in the embodiment of the present invention keeps the PS transceiver in the dual-mode terminal in a working state when the voice service is not required, and turns off the CS transceiver therein, thereby reducing the voiceless service.
- the terminal power consumption of the terminal since the terminal has been jointly attached to the 2G/3G network when the voice service is not required, when the voice service needs to be performed, the terminal can quickly complete the service switching, thereby being in the CS domain.
- the voice service is completed in the middle.
- FIG. 10 Another method for implementing a voice service is provided in the embodiment of the present invention, where the method includes:
- the terminal residing in a cell of a 2G/3G network and a cell of a 4G network at the same time.
- the terminal sends a joint attach message or a joint location update message to the mobility management entity MME in the 4G network to complete the joint attach of the terminal to the 2G/3G network and the 4G network.
- the terminal jointly attaches or jointly updates the location to the 2G/3G network and the 4G network, specifically refers to the terminal joint attachment or joint location update to the 2G/3G circuit-switched CS network and the 4G network.
- the terminal continues to camp on a cell of the 2G/3G network.
- the terminal When a voice service is required, the terminal performs the voice service by using the 2G/3G network.
- the present embodiment provides a terminal for implementing a voice service, where the terminal is a dual mode terminal. As shown in FIG. 11, the terminal includes:
- a camping unit 111 configured to enable the terminal to camp on a cell of a 2G/3G network and a cell of a 4G network at the same time;
- the attaching unit 112 is configured to send a joint attach message or a joint location update message to the mobility management entity MME in the 4G network to complete joint attachment of the terminal in the 2G/3G network and the 4G network.
- the camping unit 111 is further configured to maintain a resident state of the terminal in a cell of the 2G/3G network when voice service is not required;
- the voice unit 113 is configured to perform the voice service over the 2G/3G network when voice service is required.
- the method and the terminal for implementing the voice service provided by the embodiment of the present invention keep the PS transceiver in the dual-mode terminal in a working state when the voice service is not required, and turn off or keep the CS transceiver in the static state. In this way, the terminal power consumption of the voiceless service can be reduced. Further, since the terminal has been jointly attached to the 2G/3G network when the voice service is not required, the terminal can complete the service quickly when the voice service needs to be performed. Switch. By using the solution provided in the embodiment of the present invention, the power consumption of the terminal can be reduced to achieve the purpose of energy saving, and the process of accessing the 2G/3G network for voice service can be accelerated.
- the terminal involved in this embodiment is a dual radio terminal, that is, the terminal is provided with a CS transceiver (for example, a 2G/3G transceiver) and a PS transceiver (for example, a 4G transceiver).
- a CS transceiver for example, a 2G/3G transceiver
- a PS transceiver for example, a 4G transceiver
- the 4G network is exemplified by an LTE network; the CS transceiver and the PS transceiver in the terminal can be simultaneously opened, which may be referred to as dual radio capability.
- the method for implementing a voice service specifically includes the following steps: 1201.
- the terminal UE simultaneously camps on a cell of a 2G/3G network and a cell of an LTE network.
- the CS transceiver and the PS transceiver in the UE are simultaneously opened, and the UE simultaneously camps on the cell of the 2G/3G network and the cell of the LTE network.
- the terminal UE is jointly attached to the 2G/3G network and the LTE network.
- the terminal UE reads the location area information LAI (Location Area Identity) of the cell of the resident 2G/3G network; Transmitting the LAI in a joint attach message to an MME in an LTE network, such that the MME selects a mobile switching center MSC in a corresponding 2G/3G network, and causes the MME to send a location update message to the MSC And completing the joint attachment of the terminal in the 2G/3G network and the 4G network.
- LAI Location Area Identity
- the process of the foregoing UE being jointly attached to the 2G/3G cell by the network node MME may be as shown in FIG. 13, and includes:
- the UE sends a joint attach message attach message to the MME in the LTE cell, where the UE carries the location area information LAI of the currently located 2G/3G cell.
- the UE can reside at the same time first.
- the MME is notified by a message such as TAU (Tracking Area Update) (including the latest LAI); then the MME notifies the MSC that the LAI obtained by the MME can be kept the latest LAI. This ensures that the LAU (Location Area Update) or roaming retry (Landing Retry) is not required when the UE needs to make a call in the 2G/3G CS domain, thereby reducing the call setup time.
- TAU Track Area Update
- Landing Retry roaming retry
- the MME selects a corresponding MSC according to the LAI information, and sends an SGs setup message or an update location message (Update location) to the MSC.
- the MSC feeds back, to the MME, an SGs setup response message or a location update response message (Update). Location ack ).
- the MME feeds back a attach accept message to the UE.
- the terminal UE performs the 2G/3G network cell selection before performing the joint attachment, and reads the selected The LAI of the community.
- the location area information of the cell of the 2G/3G network currently read by the terminal is also different from the cell location area information of the 2G/3G network at the time of power-on registration, and the UE needs to be attached to the new 2G/3G cell.
- the terminal UE When the LAI of the selected cell is different from the LAI currently saved by the terminal, the terminal UE sends the LAI of the selected cell to the MME in a joint location update message, so that the MME selects a corresponding a mobile switching center MSC in the 2G/3G network, and causing the MME to send a location update message to the MSC to complete the joint attachment of the terminal between the 2G/3G network and the 4G network.
- the cell reselection process for 2G/3G may include:
- the UE sends a joint location update message TAU (Tracking Area Update) to the MME in the LTE cell, where the location area information LAI of the currently camped 2G/3G cell is carried.
- TAU Track Area Update
- the MME selects a corresponding MSC according to the LAI information, and sends an SGs setup message or an update location message (Update location) to the MSC.
- the MSC feeds back, to the MME, an SGs setup response message or a location update response message (Update location ack).
- the MME feeds back a tracking area update accept (TAU accept) message to the UE.
- TAU accept tracking area update accept
- the terminal When no voice service is required, the terminal continues to camp on a cell of the 2G/3G network.
- the PS transceiver in the terminal uses the PS transceiver in the terminal to listen to the LTE paging channel to obtain a CS paging message; meanwhile, the CS transceiver in the terminal has been opened and resides in a cell of the 2G/3G network, but It does not monitor the 2G/3G paging channel, and is not used to send and receive short messages. It can be said that the CS transceiver is in a static state.
- the terminal performs the voice service by using the 2G/3G network.
- the UE When a voice call is to be initiated, the UE initiates a call directly in the 2G/3G network. Since the CS transceiver, ie, the 2G/3G transceiver, is always on, and the LTE has been attached to the cell of the latest 2G/3G network, the UE initiates The call takes the same amount of time as a normal CS call;
- the MSC When a voice call arrives, the MSC sends a paging message to the MME, which is notified by the MME.
- the UE can respond to the paging response to the MSC directly in the 2G/3G network.
- the MSC Since the UE makes a call or responds to the call on the 2G/3G network, the MSC considers that the UE can perform services normally on the 2G/3G network, and subsequent short messages and voice calls from or to the 2G/3G network will directly pass through the 2G/3G network. If the UE performs the voice service, the UE directly uses the 2G/3G transceiver to receive the message and voice stream delivered in the CS domain.
- the UE if the UE leaves the LTE network coverage area as the user moves, the UE directly sends a LAU (Location Area Update) message to the MSC, and subsequent short messages and paging processes are also performed.
- LAU Location Area Update
- the UE If the UE moves from the area without the LTE network coverage to the LTE network coverage area as the user moves, the UE performs a joint attach or joint location update process, and subsequent short messages and paging processes are performed in the LTE network; Alternatively, the UE may actively send the joint location update after the end of the 2G/3G network call, and return the CS transceiver to the quiescent state.
- the embodiment of the present invention further provides a terminal, where the terminal is a dual mode terminal, and the CS transceiver and the PS transceiver in the terminal are simultaneously opened; as shown in FIG.
- the terminal includes:
- a camping unit 151 configured to enable the terminal to camp on a cell of a 2G/3G network and a cell of a 4G network at the same time;
- the attaching unit 152 is configured to send a joint attach message or a joint location update message to the mobility management entity MME in the 4G network to complete joint attachment of the terminal in the 2G/3G network and the 4G network.
- the camping unit 151 is further configured to maintain a resident state of the terminal in a cell of the 2G/3G network when voice service is not required;
- the voice unit 153 is configured to perform the voice service over the 2G/3G network when voice service is required.
- the method further includes:
- the reading unit 154 is configured to read the location area information LAI of the cell of the 2G/3G network that is camped on.
- the attaching unit 152 is specifically configured to carry the LAI in the joint attach message. Sending, by the MME, the MME to select a mobile switching center MSC in the corresponding 2G/3G network, and causing the MME to send a location update message to the MSC to complete the terminal in the 2G/3G network. Combined with the 4G network.
- the terminal further includes:
- the selecting unit 155 is configured to perform, by the terminal, the cell selection of the 2G/3G network, and read the LAI of the selected cell;
- the attaching unit 152 is configured to: when the LAI of the selected cell is different from the LAI currently saved by the terminal, send the LAI of the selected cell in the joint location update message to send to the MME So that the MME selects a mobile switching center MSC in the corresponding 2G/3G network, and causes the MME to send a location update message to the MSC to complete the terminal in the 2G/3G network and the 4G. Joint attachment of the network.
- the PS transceiver works normally and the CS transceiver is in a static state. At this time, the PS transceiver is used to complete the short message transmission and reception and the CS paging monitoring, which can greatly reduce the terminal consumption.
- the CS transceiver is activated to ensure the normal operation of the voice service and at the same time maintain the high-speed data service of the LTE.
- the power consumption of the terminal can be reduced, the energy saving effect is achieved, and the user maintains the high-speed data service experience while performing the voice service.
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Description
语音业务的实现方法及终端
本申请要求于 2011 年 03 月 31 日提交中国专利局、 申请号为 201110081182.6、 发明名称为"语音业务的实现方法及终端,,的中国专利申请的 优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域, 尤其涉及一种语音业务的实现方法及终端。 背景技术
现有的通信网络中包含 CS ( Circuit Switched, 电路交换)域网络和 PS
( Packet Switched, 分组交换)域网络。 例如, LTE网络中的 PS域适合用来传 输高速数据业务, GSM或者 UMTS网络中的 CS域适合用来进行语音通话。
为了实现 PS传数据 CS传语音的需求。 现有技术中, 针对双收双发(dual radio ) 的 UE, 可以使该 UE的 CS无线模块和 PS无线模块同时打开, UE同时用 PS模块进行数据业务和用 CS模块进行语音业务。
在实现上述语音业务的过程中,发明人发现该现有技术中至少存在如下问 题:
CS域网络的收发机和对应于 PS域网络的收发机需要同时打开而且都保持 在工作状态, 没有进行优化, 这样就会致使终端 UE的耗电量很大。 发明内容
本发明的实施例提供一种语音业务的实现方法及终端,用以降低终端的耗 电量, 达到节能的目的。
为达到上述目的, 本发明的实施例采用如下技术方案:
一方面, 本发明实施例提供了一种实现语音业务的方法, 包括: 终端驻留在 4G网络的小区;
终端通过向 4G网络中的移动性管理实体 MME发送联合附着消息或者联 合位置更新消息, 联合附着到 2G/3G 网络和所述 4G 网络, 其中所述终端的 CS收发机处于关闭状态;
当需要进行语音业务时,所述终端发送扩展的业务请求消息给所述 MME, 以使得所述 MME指示 4G网络的基站需要触发 CS回退;
所述终端接收所述 4G网络的基站发送的测量所述 2G/3G网络的通知; 所述终端打开所述 CS收发机, 并根据所述通知测量所述 2G/3G网络; 所述终端根据测量的结果, 在所述 2G/3G网络进行语音业务。
一种终端, 该终端为双模终端, 且该终端包括:
驻留单元, 用于使所述终端驻留在 4G网络的小区;
附着单元, 用于通过向 4G网络中的移动性管理实体 MME发送联合附着 消息或者联合位置更新消息,使所述终端联合附着到 2G/3G网络和所述 4G网 络, 其中所述终端的 CS收发机处于关闭状态;
第一发送单元,用于在需要进行语音业务时发送扩展的业务请求消息给所 述 MME, 以使得所述 MME指示 4G网络的基站需要触发 CS回退;
接收单元,用于接收所述 4G网络的基站发送的测量所述 2G/3G网络的通 知;
开启单元, 用于打开所述 CS收发机, 并根据所述通知测量所述 2G/3G网 络;
语音单元, 用于根据测量的结果在所述 2G/3G网络进行语音业务。
另一方面, 本发明实施例还提供了一种实现语音业务的方法, 包括: 终端同时驻留在 2G/3G网络的小区和 4G网络的小区;
终端通过向 4G网络中的移动性管理实体 MME发送联合附着消息或者联 合位置更新消息, 以完成所述终端在 2G/3G网络和所述 4G网络的联合附着; 当无需进行语音业务时, 所述终端继续驻留在所述 2G/3G网络的小区;
当需要进行语音业务时, 所述终端通过所述 2G/3G 网络进行所述语音业 务。
一种终端, 该终端为双模终端, 且该终端包括:
驻留单元,用于使所述终端同时驻留在 2G/3G网络的小区和 4G网络的小 区;
附着单元, 用于通过向 4G网络中的移动性管理实体 MME发送联合附着 消息或者联合位置更新消息,以完成所述终端在 2G/3G网络和所述 4G网络的 联合附着;
所述驻留单元, 还用于在无需进行语音业务时, 保持所述终端在所述 2G/3G网络的小区的驻留状态;
语音单元, 用于在需要进行语音业务时通过所述 2G/3G 网络进行所述语 音业务。
本发明实施例提供的语音业务的实现方法及终端,在无需进行语音业务的 时候, 保留双模终端中的 PS收发机处于工作状态, 同时将其中的 CS收发机 关闭或者使其处于静止状态, 这样可以降低无语音业务时的终端功耗; 进一步 地, 由于所述终端在无需进行语音业务时已经联合附着到 2G/3G 网络, 因此 在需要进行语音业务时, 所述终端可以快速地完成业务切换。 利用本发明实施 例中提供的方案, 不仅可以降低终端的耗电量达到节能的目的, 而且可以加快 接入 2G/3G网络进行语音业务的进程。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例描述中所需要使用的附图作筒单地介绍,显而易见地, 下面描述中的附图仅 仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳 动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例一中的语音业务的实现方法的流程图;
图 2为本发明实施例一中的终端的结构示意图;
图 3为本发明实施例二中的语音业务的实现方法的信令流程图;
图 4为本发明实施例三中的语音业务的实现方法的信令流程图;
图 5为本发明实施例四中的语音业务的实现方法的信令流程图;
图 6为本发明实施例五中的终端的结构示意图;
图 7为图 6中终端的语音单元的实现方式一;
图 8为图 6中终端的语音单元的实现方式二;
图 9为图 6中终端的语音单元的实现方式三;
图 10为本发明实施例六中的语音业务的实现方法的流程图;
图 11为本发明实施例六中的终端的结构示意图;
图 12为本发明实施例七中的语音业务的实现方法的流程图;
图 13为本发明实施例七中 UE附着到 2G/3G小区的信令流程图; 图 14为本发明实施例七中 UE进行 2G/3G小区重选的信令流程图; 图 15为本发明实施例七中的终端的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图 ,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
下面结合附图对本发明实施例中提供的语音业务的实现方法及终端进行 详细描述。
实施例一:
如图 1所示,本发明实施例中提供的实现语音业务的方法,包括以下步骤:
101、 终端驻留在 4G网络的小区。
102、 终端通过向 4G网络中的 MME ( Mobile Switching Entity, 移动性管 理实体)发送联合附着消息或者联合位置更新消息, 联合附着到 2G/3G 网络 和所述 4G网络, 其中所述终端的 CS收发机(例如, 2G/3G收发机)处于关 闭状态。
所述终端联合附着或者联合位置更新到 2G/3G网络和 4G网络,具体是指 终端联合附着或者联合位置更新到 2G/3G电路交换 CS网络和 4G网络。
103、当需要进行语音业务时,所述终端发送扩展的业务请求消息( extended service request )给所述 MME, 以使得所述 MME指示 4G网络的基站需要触 发 CS回退( CS fallback ) 。
104、 所述终端接收所述 4G网络的基站发送的测量所述 2G/3G网络的通 知。
105、 所述终端打开所述 CS收发机, 并根据所述通知测量所述 2G/3G网 络。
106、 所述终端根据测量的结果, 在所述 2G/3G网络进行语音业务。
对应于上述方法,本实施例提供了一种用于实现语音业务的终端; 该终端 为双模终端, 如图 2所示, 该终端包括:
驻留单元 21 , 用于使所述终端驻留在 4G网络的小区;
附着单元 22,用于通过向 4G网络中的移动性管理实体 MME发送联合附 着消息或者联合位置更新消息, 使所述终端联合附着到 2G/3G网络和所述 4G 网络, 其中所述终端的 CS收发机处于关闭状态;
第一发送单元 23, 用于在需要进行语音业务时发送扩展的业务请求消息 给所述 MME, 以使得所述 MME指示 4G网络的基站需要触发 CS回退;
接收单元 24, 用于接收所述 4G网络的基站发送的测量所述 2G/3G网络 的通知;
开启单元 25, 用于打开所述 CS收发机, 并根据所述通知测量所述 2G/3G 网络;
语音单元 26, 用于根据测量的结果在所述 2G/3G网络进行语音业务。 本发明实施例提供的语音业务的实现方法及终端,在无需进行语音业务的 时候, 保留双模终端中的 PS收发机处于工作状态, 同时将其中的 CS收发机 关闭, 这样可以降低无语音业务时的终端功耗; 进一步地, 由于所述终端在无 需进行语音业务时已经联合附着到 2G/3G网络, 因此在需要进行语音业务时, 所述终端可以快速地完成业务切换。 利用本发明实施例中提供的方案, 不仅可 以降低终端的耗电量达到节能的目的, 而且可以加快接入 2G/3G 网络进行语 音业务的进程。
在本发明实施例中所述 2G网络可以是 GSM ( Global System for Mobile Communications, 全球移动通讯***) 网络, 所述 3G 网络可以是 WCDMA ( Wideband Code Division Multiple Access , 宽带码分多址) 网络; 4G网络可 以是 LTE( Long Term Evolution,长期演进)网络或 LTE-A( Long Term Evolution Advance, 长期演进的继续演进) 网络。
实施例二: 内同时设置有 CS收发机和 PS收发机。
在本实施例中, 4G网络以 LTE网络为例, 所述终端中的 PS收发机(在 本实施例中可以为 4G收发机, 例如 LTE收发机 )一直打开且处于工作状态, 而 CS收发机(在本实施例中可以为 2G/3G收发机)处于关闭状态。
如图 3所示, 本发明实施例中提供的实现语音业务的方法, 具体包括以下 步骤:
301、 终端 UE驻留在 LTE网络的小区。
302、 终端 UE通过向 LTE网络中的 MME发送联合附着消息, 联合附着
到 LTE网络和 2G/3G网络; 其中, 终端 UE的 2G/3G收发机处于关闭状态。
303、 在需要进行语音业务时, UE向 LTE网络内的 MME发送扩展的业 务请求消息( extended service request ) , 以使得所述 MME指示 LTE网络的基 站需要触发 CSFB ( Circuit Switch FallBack, CS回退)过程。
304、 MME向 ENB( Evolved NodeB ,演进型基站)发送上下文爹改( context modification ) 消息, 用以指示 ENB进行 CS回退; 在所述上下文修改消息还 可以携带有表明当前的 CSFB过程为基于 dual radio模式的 CSFB过程的指示 信息。
在进行步骤 305之前, MME需要首先获知 UE是否具有 dual radio能力。 具体地,可以由 UE向 ENB发送 radio capability (无线能力信息 ) ,在所述 radio capability里增加 dual radio能力的指示信息,那么 ENB获得 radio capability后 就会获知 UE是否具有 dual radio能力; 或者,
由 UE通知 MME自身是否具有 dual radio能力, 比如 UE向 MME发送 network capability (网络能力信息),在所述 network capability里增力口 dual radio 能力的指示信息, MME在获知到 UE的 dual radio能力后再通知给 ENB。
305、 ENB发送测量控制 ( measurement control ) 消息给 UE, 以指示 UE 测量 2G/3G网络的小区(以下筒称 2G/3G小区)。在测量控制消息中包含 2G/3G 小区信息或者频率组信息, 所述 2G/3G小区信息用以指示终端需要测量的某 个或者某些 2G/3G小区, 所述频率组信息用以指示终端需要测量在某个或者 某些频率上进行通信的 2G/3G小区; 同时, 在测量控制消息中可以不携带测 量空隙( measurement gap ) , 以此指示 UE需要打开 2G/3G收发机测量 2G/3G 小区。
306、 UE在接收到所述测量控制消息后, 开启 2G/3G收发机, 并根据所 述测量控制消息对 2G/3G网络进行测量。
在所述 2G/3G收发机打开后, UE首先根据所述测量的结果驻留到当前附
着的 2G/3G小区, 之后在该 2G/3G小区中进行 CS语音业务。 具体地实现过 程如步骤 307~步骤 309。
307、 UE发送测量报告给 LTE网络中的基站 ENB,其中携带有 UE对 2G/3G 网络进行测量后的测量结果。
308、 ENB 根据所述测量结果选择目标小区, 并把目标小区的***消息
( target cell system information )发送给 UE。
309、 UE根据所述***消息驻留到所述 2G/3G网络的目标小区, 并执行 普通的 MO ( Mobile Originating call )或者 MT ( Mobile Terminating call )呼叫 流程。
所述驻留到 2G/3G 网络的目标小区是指终端读取目标小区的***消息, 启动小区选择和小区重选功能。
如果在执行上述步骤的过程中, UE所处的位置区与之前注册的位置区不 同, 那么 UE还需要在进行语言业务之前先通过向 4G网络( LTE网络) 中的 MME发送联合位置更新消息进行位置区更新从而使 UE联合附着到当前所处 的 2G/3G网络和 4G网络。
利用本发明实施例提供的实现语音业务的方法,在无需进行语音业务时仅 打开终端内的 PS收发机, 而 CS收发机处于关闭状态, 由于减少了 CS收发机 的功耗, 因此也就大大降低了终端整体的耗电量; 在需要进行语音业务时,
UE接收到 ENB发送的开启指示即所述测量控制消息后, 打开终端内的 CS收 发机以确保语音业务的正常进行。 利用本发明实施例中的方案, 可以降低终端 的耗电量,达到节能的目的而且用户在进行语音业务的同时保持了高速数据业 务体验。
实施例三: 内同时设置有 CS收发机和 PS收发机而且能同时工作。
在本实施例中, 4G网络以 LTE网络为例, 所述终端中的 PS收发机(在 本实施例中可以为 4G收发机, 例如 LTE收发机)一直打开且处于工作状态, 而 CS收发机(在本实施例中可以为 2G/3G收发机)处于关闭状态。
如图 4所示, 本发明实施例中提供的实现语音业务的方法, 具体包括以下 步骤:
401、 终端 UE驻留在 LTE网络的小区。
402、 终端 UE通过向 LTE网络中的 MME发送联合附着消息, 联合附着 到 LTE网络和 2G/3G网络; 其中, 终端 UE的 2G/3G收发机处于关闭状态。
403、 在需要进行语音业务时(UE做主叫或者 UE收到 CS寻呼消息做被 叫) , UE向 LTE网络内的 MME发送扩展的业务请求消息 ( extended service request ) , 以使得所述 MME指示 LTE网络的基站需要触发 CS回退过程。
404、 MME向 ENB发送上下文爹改( context modification )消息, 用以指 示 ENB进行 CS回退;在所述上下文修改消息还可以携带有表明当前的 CS回 退过程为基于 dual radio模式的 CS回退过程的指示信息。
在进行步骤 405之前, MME需要首先获知 UE是否具有 dual radio能力。 具体地,可以由 UE向 ENB发送 radio capability (无线能力信息 ) ,在所述 radio capability里增加 dual radio能力的指示信息,那么 ENB获得 radio capability后 就会获知 UE是否具有 dual radio能力; 或者,
由 UE通知 MME自身是否具有 dual radio能力, 比如 UE向 MME发送 network capability (网络能力信息),在所述 network capability里增力口 dual radio 能力的指示信息, MME在获知到 UE的 dual radio能力后再通知给 ENB。
405、 ENB发送测量控制 ( measurement control ) 消息给 UE, 以指示 UE 测量 2G/3G网络的小区(以下筒称 2G/3G小区)。在测量控制消息中包含 2G/3G 小区信息或者频率组信息, 所述 2G/3G小区信息用以指示终端需要测量的某 个或者某些 2G/3G小区, 所述频率组信息用以指示终端需要测量在某个或者
某些频率上进行通信的 2G/3G小区; 同时, 在测量控制消息中可以不携带测 量空隙( measurement gap ) , 以此指示 UE需要打开 2G/3G收发机测量 2G/3G 小区。
406、 UE在接收到所述测量控制消息后, 开启 2G/3G收发机, 并根据所 述测量控制消息对 2G/3G网络进行测量。
通过上述步骤 403~406即可完成 CS收发机,即 2G/3G收发机的开启过程。 在所述 2G/3G收发机打开后, UE根据所述测量的结果在 2G/3G小区中进行 CS语音业务的具体实现过程如步骤 407~步骤 415。
407、 UE发送测量报告给 LTE网络的基站 ENB,其中携带有 UE对 2G/3G 网络进行测量后的测量结果。 ENB根据所述测量报告中的测量结果选择 2G/3G 网络的目标小区。
之后, ENB触发 PS切换过程。 具体见后续步骤描述:
408、 ENB发送切换请求( handover required )消息给 LTE网络中的 MME, 所述切换请求消息中可以包含一个是否要做 dual radio切换的指示。
409、 MME发送切换消息 前传重定位请求 ( forward relocation request ) 给 2G/3G网络的 GPRS服务支持节点 SGSN ( Serving GPRS Support Node ) 。
如果 ENB发送的切换请求消息中包括 dual radio指示,那么 MME发送给
GPRS的前传重定位请求中也包含 dual radio指示, 而且 MME不释放承载上 下文。
除了通过上述前传重定位请求携带 dual radio指示之外, 在本实施例中还 可以定义的一个新的消息用来指示 dual radio切换。
410、 SGSN发送切换请求消息——重定位请求( relocation request )给 BSC ( Base Station Controller, 基站控制器) /RNC ( Radio Network Controller, 无 线网络控制器)。在该消息中不携带 RAB ( Radio Access Bear, 无线接入承载 ) 信息, 这样 BSC/RNC只会为 RRC连接准备资源。
411、 BSC/RNC向 SGSN返回切换应答消息——重定位响应 (relocation response ) 。
412、 SGSN向 MME返回前传重定位响应 ( forward relocation response ) 。 413、 MME发送切换响应消息——切换命令( handover command )给 ENB。 414、 ENB发送切换响应信息——切换信息( handover information )给 UE。 在步骤 414中, ENB使用一个新的 RRC ( Radio Resource Control, 无线 资源控制协议) 消息发送切换消息, 而不会影响到 ENB和 UE之间的 LTE通 信连接。
415、UE在 2G/3G网络中建立新的 RRC连接,然后利用 UE内部的 2G/3G 收发机通过新建立的 RRC连接完成普通的 MO或者 MT流程。
在步骤 415中, UE在 2G/3G网络中建立新的 RRC连接来完成语音业务, 并不影响 LTE网络中的数据业务; 因此, SGSN不会要求 RNC/BSC建立专用 传输信道, SGSN也不会发送更新消息给 SGW, 即 SGSN只是在 BSC/RNC侧 建立信令承载而不更新用户面到 SGW。
利用本发明实施例提供的实现语音业务的方法,在无需进行语音业务时仅 打开终端内的 PS收发机, 而 CS收发机处于关闭状态, 由于减少了 CS收发机 的功耗, 因此也就大大降低了终端整体的耗电量;
而且, 在本发明实施例中, 通过在 CS域构建新的 RRC连接来完成语音 业务, 在此过程中 PS域业务并没有真正切换到 2G/3G网络中, 而是继续保持 在 LTE网络, 也就是说, 在此过程中通过做一个假的 PS切换来建立 2G/3G 的 RRC连接。 由于数据业务一直保持在 LTE网络中, 本实施例中的方案不涉 及到数据业务的网络切换, 因此这一实现方式可以使 UE进行 CS语音的同时 还保持高速数据业务的良好体验。
在上述步骤 408中, ENB也可以根据自己的负荷决定是否发起真正的 PS 切换, 比如 ENB负荷大时, 则可以发起真正的 PS切换, 那么在 MME发送给
GPRS的前传重定位请求中就不携带 dual radio指示。
实施例四: 内同时设置有 CS收发机和 PS收发机。
在本实施例中, 4G网络以 LTE网络为例, 所述终端中的 PS收发机(在 本实施例中可以为 4G收发机, 例如 LTE收发机)一直打开且处于工作状态, 而 CS收发机(在本实施例中可以为 2G/3G收发机)处于关闭状态。
如图 5所示, 本发明实施例中提供的实现语音业务的方法, 具体包括以下 步骤:
501、 终端 UE驻留在 LTE网络的小区。
502、 终端 UE通过向 LTE网络中的 MME发送联合附着消息, 联合附着 到 LTE网络和 2G/3G 网络; 其中, 终端 UE的 2G/3G收发机处于关闭状态。
503、 在需要进行语音业务时, UE向 LTE网络内的 MME发送扩展的业 务请求消息( extended service request ) , 以使得所述 MME指示 LTE网络的基 站需要触发 CS回退过程。
504、 MME向 ENB发送上下文爹改( context modification )消息, 用以指 示 ENB进行 CS回退;在所述上下文修改消息还可以携带有表明当前的 CS回 退过程为基于 dual radio模式的 CS回退过程的指示信息。
在进行步骤 505之前, MME需要首先获知 UE是否具有 dual radio能力。 具体地,可以由 UE向 ENB发送 radio capability (无线能力信息 ) ,在所述 radio capability里增加 dual radio能力的指示信息,那么 ENB获得 radio capability后 就会获知 UE是否具有 dual radio能力; 或者,
由 UE通知 MME自身是否具有 dual radio能力, 比如 UE向 MME发送 network capability (网络能力信息),在所述 network capability里增力口 dual radio 能力的指示信息, MME在获知到 UE的 dual radio能力后再通知给 ENB。
505、 ENB发送测量控制 ( measurement control ) 消息给 UE, 以指示 UE 测量 2G/3G网络的小区(以下筒称 2G/3G小区)。在测量控制消息中包含 2G/3G 小区信息或者频率组信息, 所述 2G/3G小区信息用以指示终端需要测量的某 个或者某些 2G/3G小区, 所述频率组信息用以指示终端需要测量在某个或者 某些频率上进行通信的 2G/3G 小区; 同时, 在测量控制消息中可以不携带测 量空隙( measurement gap ) , 以此指示 UE需要打开 2G/3G收发机测量 2G/3G 小区。
506、 UE在接收到所述测量控制消息后, 开启 2G/3G收发机, 并根据所 述测量控制消息对 2G/3G网络进行测量。
通过上述步骤 503~506即可完成 CS收发机,即 2G/3G收发机的开启过程。 在所述 2G/3G收发机打开后, UE根据所述测量的结果在 2G/3G小区中进行 CS语音业务。 具体地实现过程如步骤 507~步骤 514。
507、 UE发送测量报告给 LTE网络的基站 ENB,其中携带有 UE对 2G/3G 网络进行测量后的测量结果。 ENB根据所述测量报告中的测量结果选择 2G/3G 网络的目标小区。
之后, ENB触发 PS域到 CS域( PS to CS ) 的切换过程。 具体见后续步 骤描述:
508、 ENB发送切换请求( handover required )消息给 LTE网络中的 MME。
509、 MME向 MSC ( Mobile Switching Center, 移动交换中心)发送 PS to CS切换消息。
其中, MME可以在该消息中指示不需要发起呼叫或者包含一个空号码, 这样 MSC都不会发起呼叫。
510、 MSC发送切换请求给 BSC/RNC, BSC/RNC回应切换应答消息。 在该步骤中, BSC/RNC在接收到 MSC发送的切换请求后, 会为后续的 CS语音业务预留资源。
511、 MSC回应 PS to CS切换应答消息给 MME。
512、 MME发送切换命令 ( handover command )给 ENB。
513、 ENB发送切换信息( handover information )给 UE。
在步骤 513中, 所述切换信息可以承载在一个新的 RRC消息里, 这样不 会导致 UE和 ENB真正断开 LTE空口连接。
514、 UE切换到 2G/3G网络, 接入所述 2G/3G网络的目标小区并按照普 通的 CS MO或者 MT流程继续呼叫。
由于在步骤 510中 BSC/RNC已经为 CS语音业务预留了资源, 传输信道 已经建立, 因此在完成步骤 514中的普通 MO或 MT流程时 MSC不需要重新 进行 RAB ( Radio Access Bear, 无线接入 载)指配。
在上述实现语音业务的过程中,如果 UE是发起主叫业务,那么在步骤 503 中所述扩展的业务请求消息中也可以携带被叫号码,在步骤 509中 MME通过 所述 PS to CS切换消息将被叫号码传递给 MSC,之后 MSC即可开始呼叫被叫 号码对应的终端。
利用本发明实施例提供的实现语音业务的方法,在无需进行语音业务时仅 打开终端内的 PS收发机, 而 CS收发机处于关闭状态, 由于减少了 CS收发机 的功耗, 因此也就大大降低了终端整体的耗电量;
而且, 在本发明实施例中, 通过 ENB触发一个 PS to CS的切换过程, 并 在切换过程中将 RRC连接和传输信道都建立了, 为后续 UE切换到 2G/3G网 络中做好准备, 能够加速 UE在 2G/3G网络中的接入速度,使终端在快速进行 CS语音的同时还能在 LTE等高带宽的无线网络上继续业务。
此外, 本实施例中的方案还可以适用于 single radio (任何时刻最多只能有 一个无线收发机处于工作状态)模式的终端。 如果用于 single radio终端, 那 么步骤 504中不携带 dual radio CSFB指示, 在步骤 505中携带测量空隙, 步 骤 506步骤中是利用测量空隙对 2G/3G小区进行测量而且该步骤是可选的,
如果步骤 506没有执行, 则步骤 507不执行, 步骤 513中使用 Mobility From EUTRAN命令。 而 UE打开 2G/3G收发机的过程可以在步骤 513之后执行。 此时,步骤 513中的切换信息可以是通过 Mobility From Eutran消息发送给 UE 的, 而且 UE在步骤 513之后断开与 ENB之间的 LTE连接。
本发明实施例中所述的联合附着, 能使 2G/3G CS网络的寻呼消息在 4G 网络下发, 终端在 2G/3G小区不接收寻呼消息, 短消息通过 4G网络收发, 然 后 4G网络的 MME转发给 2G/3G的 CS网络的 MSC。 当 MSC判断 UE已经 从 2G/3G小区接入的时候, 则认为 UE已经不再是联合附着状态,这时候短消 息和语音业务等都通过 2G/3G网络小区发送给 UE。MSC判断 UE已经从 2G/3G 接入的方法是从 2G/3G接入网络收到了 UE的消息。
实施例五:
对应于上述方法实施例,本发明实施例中还提供了一种可用于实现上述方 法的终端。
本发明实施例中提供的终端为双模 ( dual radio )终端, 其中同时设置有 CS收发机和 PS收发机; 如图 6所示, 所述终端包括:
驻留单元 61 , 用于使所述终端驻留在 4G网络的小区;
附着单元 62,用于通过向 4G网络中的移动性管理实体 MME发送联合附 着消息或者联合位置更新消息, 使所述终端联合附着到 2G/3G网络和所述 4G 网络, 其中所述终端的 CS收发机处于关闭状态;
第一发送单元 63, 用于在需要进行语音业务时发送扩展的业务请求消息 给所述 MME, 以使得所述 MME指示 4G网络的基站需要触发 CS回退; 接收单元 64, 用于接收所述 4G网络的基站发送的测量所述 2G/3G网络 的通知;
开启单元 65, 用于打开所述 CS收发机, 并根据所述通知测量所述 2G/3G 网络;
语音单元 66, 用于根据测量的结果在所述 2G/3G网络进行语音业务。 在本实施例中, 所述语音单元 66, 具体用于根据所述测量的结果驻留到 所述 2G/3G网络的小区, 并进行 CS语音业务; 进一步地,
上述语音单元 66, 可以是如图 7所示, 包括:
第一发送模块 71 , 用于发送测量报告给所述 4G网络的基站;
第一接收模块 72, 用于接收所述 4G网络的基站发送的、 所述 4G网络的 基站根据所述测量报告选择的 2G/3G网络的目标小区的***消息;
第一语音模块 73 , 用于根据所述***消息驻留到所述 2G/3G网络的目标 小区, 并进行所述 CS语音业务。
或者, 在本实施例中, 所述语音单元还可以是如图 8所示, 包括: 第二发送模块 81 , 用于发送测量报告给所述 4G网络的基站, 以使得所述
4G网络的基站选择所述 2G/3G网络的目标小区并使得所述 4G网络触发双收 发机模式的切换; 其中, 所述 4G网络进行双收双发模式切换的过程可以参见 实施例三中的步骤 408~步骤 415 , 此处不再赘述;
第二接收模块 82, 用于接收所述 4G网络的基站发送的切换响应信息; 第二语音模块 83 , 用于接入 2G/3G网络的目标小区并进行 CS语音业务。 或者, 在本实施例中, 所述语音单元也可以是如图 9所示, 包括: 第三发送模块 91 , 用于发送测量报告给所述 4G网络的基站, 以使得所述
4G网络的基站选择所述 2G/3G网络的目标小区并使得所述 4G网络触发 PS 到 CS切换; 其中, 所述 4G网络进行 PS到 CS切换的过程可以参见实施例四 中的步骤 508~步骤 514, 此处不再赘述;
第三接收模块 92, 用于接收所述 4G网络的基站发送的切换响应信息; 第三语音模块 93 , 用于接入所述 2G/3G网络的目标小区并进行 CS语音 业务。
此外, 在本实施例中的终端中还包括:
第二发送单元, 用于向所述 4G网络的基站发送无线能力信息, 其中所述 无线能力信息包含当前终端的双收双发能力指示信息; 或者,
第三发送单元, 用于向所述 4G网络的核心网发送网络能力信息, 其中所 述网络能力信息包含所述终端的双收双发能力指示信息, 以便所述 4G网络的 核心网将所述终端的双收双发能力通知给所述 4G网络的基站。
利用本发明实施例中的终端来实现语音业务的过程可以参照方法实施例 二、 实施例三和实施例四中的描述, 此处不再赞述。
本发明实施例中的用于实现语音业务的终端, 在无需进行语音业务的时 候, 保留双模终端中的 PS收发机处于工作状态, 同时将其中的 CS收发机关 闭, 这样可以降低无语音业务时的终端功耗; 进一步地, 由于所述终端在无需 进行语音业务时已经联合附着到 2G/3G 网络, 因此在需要进行语音业务时, 所述终端可以快速地完成业务切换, 从而在 CS域中完成所述语音业务。
实施例六:
如图 10所示, 本发明实施例中提供了另一种实现语音业务的方法, 该方 法包括:
1001、 终端同时驻留在 2G/3G网络的小区和 4G网络的小区。
1002、 终端通过向 4G网络中的移动性管理实体 MME发送联合附着消息 或者联合位置更新消息,以完成所述终端在 2G/3G网络和所述 4G网络的联合 附着。
所述终端联合附着或者联合位置更新到 2G/3G网络和 4G网络,具体是指 终端联合附着或者联合位置更新到 2G/3G电路交换 CS网络和 4G网络。
1003、 当无需进行语音业务时, 所述终端继续驻留在所述 2G/3G 网络的 小区。
1004、 当需要进行语音业务时, 所述终端通过所述 2G/3G 网络进行所述 语音业务。
对应于上述方法,本实施例提供了一种用于实现语音业务的终端, 该终端 为双模终端; 如图 11所示, 所述终端包括:
驻留单元 111 , 用于使所述终端同时驻留在 2G/3G网络的小区和 4G网络 的小区;
附着单元 112, 用于通过向 4G网络中的移动性管理实体 MME发送联合 附着消息或者联合位置更新消息,以完成所述终端在 2G/3G网络和所述 4G网 络的联合附着;
所述驻留单元 111 , 还用于在无需进行语音业务时, 保持所述终端在所述 2G/3G网络的小区的驻留状态;
语音单元 113,用于在需要进行语音业务时通过所述 2G/3G网络进行所述 语音业务。
本发明实施例提供的语音业务的实现方法及终端,在无需进行语音业务的 时候, 保留双模终端中的 PS收发机处于工作状态, 同时将其中的 CS收发机 关闭或者使其处于静止状态, 这样可以降低无语音业务时的终端功耗; 进一步 地, 由于所述终端在无需进行语音业务时已经联合附着到 2G/3G 网络, 因此 在需要进行语音业务时,所述终端可以快速地完成业务切换。 利用本发明实施 例中提供的方案, 不仅可以降低终端的耗电量达到节能的目的, 而且可以加快 接入 2G/3G网络进行语音业务的进程。
实施例七:
本实施例中所涉及到的终端为双收双发 ( dual radio )终端, 即该终端中同 时设置有 CS收发机(例如, 2G/3G收发机 )和 PS收发机(例如, 4G收发机 )。
在本实施例中, 4G网络以 LTE网络为例; 所述终端中的 CS收发机和 PS 收发机可以同时打开, 这可以称为双收双发(dual radio ) 能力。
如图 12所示, 本发明实施例中提供的实现语音业务的方法, 具体包括以 下步骤:
1201、 终端 UE同时驻留在 2G/3G网络的小区和 LTE网络的小区。
终端 UE在开机后, UE中的 CS收发机和 PS收发机同时打开, 此时 UE 同时驻留在 2G/3G网络的小区和 LTE网络的小区。
1202、 终端 UE联合附着到所述 2G/3G网络和所述 LTE网络。
具体地, 在 UE联合附着到 2G/3G网络和 LTE网络之前, 终端 UE会读 取驻留的 2G/3G网络的小区的位置区信息 LAI ( Location Area Identity, 位置 区识别码) ; 之后, UE将所述 LAI携带在联合附着消息中向 LTE网络中的 MME发送,以使得所述 MME选择对应的 2G/3G网络中的移动交换中心 MSC , 并使得所述 MME 向所述 MSC发送位置更新消息, 以完成所述终端在所述 2G/3G网络和所述 4G网络的联合附着。
上述 UE通过网络节点 MME联合附着到 2G/3G小区的过程, 可以如图 13所示, 包括:
511、 UE在 LTE小区里向 MME发送联合附着消息 attach消息, 其中携 带有当前所处的 2G/3G小区的位置区信息 LAI。
需要说明的是: 由于是两个收发机同时打开, 所以 UE可以先同时驻留在
2G/3G网络的小区和 LTE网络的小区, 并且读取***消息从而获得当前驻留 的 2G/3G网络的小区的 LAI; 后续由于 2G/3G小区选择或者重选导致的 LAI 改变,所述 UE都会通过 TAU ( Tracking Area Update,跟踪区更新 )等消息(包 含最新的 LAI )通知给 MME; 然后 MME通知给 MSC, 总之能保持 MME获 取的 LAI是最新的 LAI。 这样能保证当 UE需要在 2G/3G CS域进行呼叫时不 需要进行 LAU ( Location Area Update, 位置区更新 )或者 roaming retry (漫游 重试) , 从而减少呼叫建立时间。
512、 MME根据所述 LAI信息选择对应的 MSC, 并发送 SGs建立消息或 者位置更新消息( Update location )给该 MSC。
S13、 MSC向 MME反馈 SGs建立响应消息或者位置更新响应消息( Update
location ack ) 。
514、 MME向 UE反馈附着接受 ( attach accept ) 消息。
如果在通信过程中 UE的位置发生改变,且此时 UE所处的 2G/3G小区也 相应改变; 此时, 终端 UE会在进行联合附着之前进行 2G/3G网络小区选择, 并读取选择的小区的 LAI。 终端当前所读取到的 2G/3G 网络的小区的位置区 信息也会不同于开机注册时的 2G/3G网络的小区位置区信息,那么 UE需要附 着到新的 2G/3G小区中。
当所述选择的小区的 LAI不同于所述终端当前保存的 LAI时, 终端 UE 将所述选择的小区的 LAI携带在联合位置更新消息中向所述 MME发送,以使 得所述 MME选择对应的 2G/3G 网络中的移动交换中心 MSC, 并使得所述 MME向所述 MSC发送位置更新消息, 以完成所述终端在所述 2G/3G网络和 所述 4G网络的联合附着。
其中针对 2G/3G的小区重选过程, 如图 14所示, 可以包括:
515、 UE在 LTE小区里向 MME发送联合位置更新消息 TAU ( Tracking Area Update, 跟踪区域更新) , 其中携带有当前驻留的 2G/3G小区的位置区 信息 LAI。
516、 MME根据所述 LAI信息选择对应的 MSC, 并发送 SGs建立消息或 者位置更新消息( Update location )给该 MSC。
517、 MSC向 MME反馈 SGs建立响应消息或者位置更新响应消息( Update location ack ) 。
S 18、 MME向 UE反馈跟踪区域更新接受 ( TAU accept ) 消息。
1203、 当无需进行语音业务时, 所述终端继续驻留在所述 2G/3G 网络的 小区。
利用所述终端中的 PS收发机监听 LTE寻呼信道, 获取 CS寻呼消息; 同 时, 所述终端中的 CS收发机虽然已经打开并驻留在 2G/3G网络的小区, 但并
不监听 2G/3G寻呼信道, 也不用来收发短消息等, 可以称这种状态为 CS收发 机处于静止状态。
这样, 在没有语音业务的时候, 只有 PS收发机处于正常工作状态, 可以 大大降低 PS收发机和 CS收发机都打开时的耗电量。
1204、 当需要进行语音业务时, 所述终端通过所述 2G/3G 网络进行所述 语音业务。
当要发起语音呼叫时, UE直接在 2G/3G网络中发起呼叫, 由于 CS收发 机即 2G/3G收发机一直开着, 而且通过 LTE已经附着到了最新的 2G/3G网络 的小区, 所以 UE发起呼叫需要的时间与普通的 CS呼叫相同;
当有语音呼叫到达时, MSC发送寻呼消息给 MME, 再由 MME通知给
UE, UE可以直接在 2G/3G网络中回应寻呼应答给 MSC。
由于 UE在 2G/3G网络进行呼叫或者响应呼叫, MSC认为 UE后续可以 在 2G/3G网络正常进行业务, 后续的来自或者发往 2G/3G网络的短消息和语 音呼叫都会通过 2G/3G网络直接进行, 不会通过 MME来转发; 也就是说, 在 UE进行语音业务时, UE会直接利用其中的 2G/3G收发机来接收 CS域中下发 的消息及语音流。
在上述过程中, 如果随着用户的移动, UE离开了 LTE网络覆盖区域, 那 么 UE会直接向 MSC发送 LAU ( Location Area Update, 位置区更新 ) 消息, 后续的短消息和寻呼等过程也都在 2G/3G网络中进行;
如果随着用户的移动, UE从没有 LTE网络覆盖的区域移动到 LTE网络 覆盖区域, 那么 UE会进行联合附着或者联合位置更新的过程, 后续短消息和 寻呼等过程都在 LTE网络中进行; 或者, 在 2G/3G网络呼叫结束后 UE可以 主动发送联合位置更新, 并使 CS收发机回复到静止状态。
对应于上述方法实施例, 本发明实施例中还提供了一种终端, 该终端为双 模终端, 并且该终端中的 CS收发机和 PS收发机同时打开; 如图 15所示, 所
述终端包括:
驻留单元 151 , 用于使所述终端同时驻留在 2G/3G网络的小区和 4G网络 的小区;
附着单元 152, 用于通过向 4G网络中的移动性管理实体 MME发送联合 附着消息或者联合位置更新消息,以完成所述终端在 2G/3G网络和所述 4G网 络的联合附着;
所述驻留单元 151 , 还用于在无需进行语音业务时, 保持所述终端在所述 2G/3G网络的小区的驻留状态;
语音单元 153,用于在需要进行语音业务时通过所述 2G/3G网络进行所述 语音业务。
在本实施例提供的终端中, 还包括:
读取单元 154,用于读取驻留的所述 2G/3G网络的小区的位置区信息 LAI; 此时, 所述附着单元 152具体用于将所述 LAI携带在所述联合附着消息 中向所述 MME发送,以使得所述 MME选择对应的 2G/3G网络中的移动交换 中心 MSC, 并使得所述 MME向所述 MSC发送位置更新消息, 以完成所述终 端在所述 2G/3G网络和所述 4G网络的联合附着。
进一步地, 所述终端还包括:
选取单元 155, 用于所述终端进行 2G/3G网络小区选择, 并读取选择的小 区的 LAI;
所述附着单元 152,具体用于在所述选择的小区的 LAI不同于所述终端当 前保存的 LAI时, 将所述选择的小区的 LAI携带在所述联合位置更新消息中 向所述 MME发送,以使得所述 MME选择对应的 2G/3G网络中的移动交换中 心 MSC, 并使得所述 MME向所述 MSC发送位置更新消息, 以完成所述终端 在所述 2G/3G网络和所述 4G网络的联合附着。
利用本发明实施例提供的实现语音业务的方案,终端内部的两个收发机同
时打开, 其中在无需进行语音业务时 PS收发机正常工作而 CS收发机处于静 止状态, 此时利用所述 PS收发机来完成短消息的收发以及 CS寻呼的监听, 可以大大降低终端的耗电量; 而在需要进行语音业务时, 将所述 CS收发机激 活, 以保证语音业务的正常进行而且同时保持了 LTE的高速数据业务。 利用 本发明实施例中的方案, 可以降低终端的耗电量, 达到节能的目的而且用户在 进行语音业务的同时保持了高速数据业务体验。
通过以上实施方式的描述,本领域的技术人员可以清楚地了解到本发明可 借助软件加必需的硬件平台的方式来实现, 当然也可以全部通过硬件来实施。 基于这样的理解,本发明的技术方案对背景技术做出贡献的全部或者部分可以 以软件产品的形式体现出来, 该计算机软件产品可以存储在存储介质中, 如 ROM/RAM, 磁碟、 光盘等, 包括若干指令用以使得一台计算机设备(可以是 个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例或者实施例的 某些部分所述的方法。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于 此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到 的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围 应以权利要求的保护范围为准。
Claims
1、 一种实现语音业务的方法, 其特征在于, 包括:
终端驻留在 4G网络的小区;
终端通过向 4G网络中的移动性管理实体 MME发送联合附着消息或者联 合位置更新消息, 联合附着到 2G/3G 网络和所述 4G 网络, 其中所述终端的 CS收发机处于关闭状态;
当需要进行语音业务时,所述终端发送扩展的业务请求消息给所述 MME, 以使得所述 MME指示 4G网络的基站需要触发 CS回退;
所述终端接收所述 4G网络的基站发送的测量所述 2G/3G网络的通知; 所述终端打开所述 CS收发机, 并根据所述通知测量所述 2G/3G网络; 所述终端根据测量的结果, 在所述 2G/3G网络进行语音业务。
2、 根据权利要求 1所述的实现语音业务的方法, 其特征在于, 所述终端 根据测量的结果, 在所述 2G/3G网络进行语音业务, 包括:
所述终端根据所述测量的结果驻留到所述 2G/3G网络的小区, 并进行 CS 语音业务。
3、 根据权利要求 2所述的实现语音业务的方法, 其特征在于, 所述终端 根据所述测量的结果驻留到所述 2G/3G网络的小区, 并进行 CS语音业务, 包 括:
所述终端发送测量报告给所述 4G网络的基站;
所述终端接收所述 4G网络的基站发送的、 所述 4G网络的基站根据所述 测量报告选择的 2G/3G网络的目标小区的***消息;
终端才艮据所述***消息驻留到所述 2G/3G 网络的目标小区, 并进行所述 CS语音业务。
4、 根据权利要求 1所述的实现语音业务的方法, 其特征在于, 所述终端 根据测量的结果, 在所述 2G/3G网络进行语音业务, 包括: 所述终端发送测量报告给所述 4G网络的基站;
所述 4G网络的基站根据所述测量报告选择所述 2G/3G网络的目标小区, 并发送切换请求消息给 4G网络的移动性管理实体 MME, 其中该切换请求消 息中携带有进行双收发机模式的切换的指示;
所述 MME发送切换前传消息给 2G/3G网络的 GPRS服务支持节点 SGSN, 其中, 该切换前传消息中携带有所述进行双收发机模式的切换的指示;
所述 SGSN 发送切换请求消息给基站控制器 BSC 或无线网络控制器 RNC, 其中, 该切换请求消息中不携带承载信息;
所述 BSC或 RNC返回切换应答消息给所述 SGSN;
所述 SGSN返回切换前传响应消息给所述 MME;
所述 MME发送切换响应消息给所述 4G网络的基站;
所述 4G网络的基站发送切换响应信息给所述终端;
所述终端接入所述 2G/3G网络的目标小区并进行 CS语音业务。
5、 根据权利要求 1所述的实现语音业务的方法, 其特征在于, 所述终端 根据测量的结果, 在所述 2G/3G网络进行语音业务, 包括:
所述终端发送测量报告给所述 4G网络的基站;
所述 4G网络的基站根据所述测量报告选择所述 2G/3G网络的目标小区, 并发送切换请求消息给 MME;
所述 MME发送 PS到 CS切换消息给移动交换中心 MSC;
所述 MSC返回 PS到 CS切换应答消息给所述 MME;
所述 MME发送切换应答消息给所述 4G网络的基站;
所述 4G网络的基站发送切换响应信息给所述终端;
所述终端接入所述 2G/3G网络的目标小区并进行 CS语音业务。
6、 根据权利要求 1所述的实现语音业务的方法, 其特征在于, 所述测量 2G/3G网络的通知中包含 2G/3G网络的小区信息或者频率组信息, 但不包含 测量空隙配置。
7、 根据权利要求 1所述的实现语音业务的方法, 其特征在于, 在所述终 端接收所述 4G网络的基站发送的测量所述 2G/3G网络的通知之前, 还包括: 所述终端向所述 4G网络的基站发送无线能力信息, 其中所述无线能力信 息包含当前终端的双收双发能力指示信息; 或者,
所述终端向所述 4G网络的核心网发送网络能力信息, 其中所述网络能力 信息包含所述终端的双收双发能力指示信息, 以便所述 4G网络的核心网将所 述终端的双收双发能力通知给所述 4G网络的基站。
8、 一种实现语音业务的方法, 其特征在于, 包括:
终端同时驻留在 2G/3G网络的小区和 4G网络的小区;
终端通过向 4G网络中的移动性管理实体 MME发送联合附着消息或者联 合位置更新消息, 以完成所述终端在 2G/3G网络和所述 4G网络的联合附着; 当无需进行语音业务时, 所述终端继续驻留在所述 2G/3G网络的小区; 当需要进行语音业务时, 所述终端通过所述 2G/3G 网络进行所述语音业 务。
9、 根据权利要求 8所述的实现语音业务的方法, 其特征在于, 在所述终 端驻留在所述 2G/3G网络的小区之后, 终端联合附着到 2G/3G网络和 4G网 络之前, 还包括: 所述终端读取驻留的所述 2G/3G 网络的小区的位置区信息 LAI;
所述终端通过向 4G网络中的 MME发送联合附着消息, 以完成所述终端 到 2G/3G网络和所述 4G网络的联合附着, 包括:
所述终端将所述 LAI携带在所述联合附着消息中向所述 MME发送,以使 得所述 MME选择对应的 2G/3G 网络中的移动交换中心 MSC, 并使得所述 MME向所述 MSC发送位置更新消息, 以完成所述终端在所述 2G/3G网络和 所述 4G网络的联合附着。
10、 根据权利要求 8所述的实现语音业务的方法, 其特征在于, 在所述终 端驻留在所述 2G/3G网络的小区之后, 联合更新到 2G/3G网络和 4G网络之 前, 还包括: 所述终端进行 2G/3G网络小区选择, 并读取选择的小区的 LAI; 所述终端通过向 4G网络中的 MME发送联合位置更新消息, 以完成所述 终端在所述 2G/3G网络和所述 4G网络的联合附着, 包括:
当所述选择的小区的 LAI不同于所述终端当前保存的 LAI时, 所述终端 将所述选择的小区的 LAI携带在所述联合位置更新消息中向所述 MME发送, 以使得所述 MME选择对应的 2G/3G网络中的移动交换中心 MSC, 并使得所 述 MME向所述 MSC发送位置更新消息, 以完成所述终端在所述 2G/3G网络 和所述 4G网络的联合附着。
11、 一种终端, 该终端为双模终端; 其特征在于, 包括:
驻留单元, 用于使所述终端驻留在 4G网络的小区;
附着单元, 用于通过向 4G网络中的移动性管理实体 MME发送联合附着 消息或者联合位置更新消息,使所述终端联合附着到 2G/3G网络和所述 4G网 络, 其中所述终端的 CS收发机处于关闭状态;
第一发送单元,用于在需要进行语音业务时发送扩展的业务请求消息给所 述 MME, 以使得所述 MME指示 4G网络的基站需要触发 CS回退;
接收单元,用于接收所述 4G网络的基站发送的测量所述 2G/3G网络的通 知;
开启单元, 用于打开所述 CS收发机, 并根据所述通知测量所述 2G/3G网 络;
语音单元, 用于根据测量的结果在所述 2G/3G网络进行语音业务。
12、 根据权利要求 11所述的终端, 其特征在于, 所述语音单元, 具体用 于根据所述测量的结果驻留到所述 2G/3G网络的小区, 并进行 CS语音业务。
13、 根据权利要求 12所述的终端, 其特征在于, 所述语音单元包括: 第一发送模块, 用于发送测量报告给所述 4G网络的基站;
第一接收模块, 用于接收所述 4G网络的基站发送的、 所述 4G网络的基 站根据所述测量报告选择的 2G/3G网络的目标小区的***消息;
第一语音模块, 用于根据所述***消息驻留到所述 2G/3G 网络的目标小 区, 并进行所述 CS语音业务。
14、 根据权利要求 11所述的终端, 其特征在于, 所述语音单元包括: 第二发送模块,用于发送测量报告给所述 4G网络的基站,以使得所述 4G 网络的基站选择所述 2G/3G网络的目标小区并使得所述 4G网络触发双收发机 模式的切换;
第二接收模块, 用于接收所述 4G网络的基站发送的切换响应信息; 第二语音模块, 用于接入 2G/3G网络的目标小区并进行 CS语音业务。
15、 根据权利要求 11所述的终端, 其特征在于, 所述语音单元包括: 第三发送模块,用于发送测量报告给所述 4G网络的基站,以使得所述 4G 网络的基站选择所述 2G/3G网络的目标小区并使得所述 4G网络触发 PS到 CS 切换;
第三接收模块, 用于接收所述 4G网络的基站发送的切换响应信息; 第三语音模块,用于接入所述 2G/3G网络的目标小区并进行 CS语音业务。
16、 根据权利要求 11所述的终端, 其特征在于, 还包括:
第二发送单元, 用于向所述 4G网络的基站发送无线能力信息, 其中所述 无线能力信息包含当前终端的双收双发能力指示信息; 或者,
第三发送单元, 用于向所述 4G网络的核心网发送网络能力信息, 其中所 述网络能力信息包含所述终端的双收双发能力指示信息, 以便所述 4G网络的 核心网将所述终端的双收双发能力通知给所述 4G网络的基站。
17、 一种终端, 其特征在于, 包括:
驻留单元,用于使所述终端同时驻留在 2G/3G网络的小区和 4G网络的小 区;
附着单元, 用于通过向 4G网络中的移动性管理实体 MME发送联合附着 消息或者联合位置更新消息,以完成所述终端在 2G/3G网络和所述 4G网络的 联合附着;
所述驻留单元, 还用于在无需进行语音业务时, 保持所述终端在所述
2G/3G网络的小区的驻留状态;
语音单元, 用于在需要进行语音业务时通过所述 2G/3G 网络进行所述语 音业务。
18、 根据权利要求 17所述的终端, 其特征在于, 还包括:
读取单元, 用于读取驻留的所述 2G/3G网络的小区的位置区信息 LAI; 所述附着单元, 具体用于将所述 LAI携带在所述联合附着消息中向所述 MME发送,以使得所述 MME选择对应的 2G/3G网络中的移动交换中心 MSC , 并使得所述 MME 向所述 MSC发送位置更新消息, 以完成所述终端在所述 2G/3G网络和所述 4G网络的联合附着。
19、 根据权利要求 17所述的终端, 其特征在于, 还包括:
选取单元, 用于所述终端进行 2G/3G 网络小区选择, 并读取选择的小区 的 LAI;
所述附着单元, 具体用于在所述选择的小区的 LAI不同于所述终端当前 保存的 LAI时, 将所述选择的小区的 LAI携带在所述联合位置更新消息中向 所述 MME发送,以使得所述 MME选择对应的 2G/3G网络中的移动交换中心 MSC , 并使得所述 MME向所述 MSC发送位置更新消息, 以完成所述终端在 所述 2G/3G网络和所述 4G网络的联合附着。
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CN101984714B (zh) * | 2010-10-27 | 2015-03-25 | 中兴通讯股份有限公司 | 一种双网双待终端及降低功耗的方法 |
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2011
- 2011-03-31 CN CN2011100811826A patent/CN102740418A/zh active Pending
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2012
- 2012-03-31 WO PCT/CN2012/073433 patent/WO2012130177A1/zh active Application Filing
- 2012-03-31 JP JP2014501431A patent/JP2014511079A/ja active Pending
- 2012-03-31 EP EP12763161.2A patent/EP2688345A4/en not_active Withdrawn
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2013
- 2013-09-30 US US14/041,776 patent/US20140071951A1/en not_active Abandoned
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WO2018010076A1 (zh) * | 2016-07-11 | 2018-01-18 | 华为技术有限公司 | 一种触发电路交换回落流程的方法、装置及*** |
Also Published As
Publication number | Publication date |
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US20140071951A1 (en) | 2014-03-13 |
CN102740418A (zh) | 2012-10-17 |
JP2014511079A (ja) | 2014-05-01 |
EP2688345A4 (en) | 2014-08-13 |
EP2688345A1 (en) | 2014-01-22 |
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