WO2016058164A1 - Procédé de traitement d'un service vocal et terminal - Google Patents

Procédé de traitement d'un service vocal et terminal Download PDF

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Publication number
WO2016058164A1
WO2016058164A1 PCT/CN2014/088748 CN2014088748W WO2016058164A1 WO 2016058164 A1 WO2016058164 A1 WO 2016058164A1 CN 2014088748 W CN2014088748 W CN 2014088748W WO 2016058164 A1 WO2016058164 A1 WO 2016058164A1
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WIPO (PCT)
Prior art keywords
network
cell
terminal
message
information
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PCT/CN2014/088748
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English (en)
Chinese (zh)
Inventor
金辉
于亚军
宋昊
封鹏飞
段小嫣
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华为技术有限公司
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Priority to PCT/CN2014/088748 priority Critical patent/WO2016058164A1/fr
Priority to CN201480074599.1A priority patent/CN106063327B/zh
Publication of WO2016058164A1 publication Critical patent/WO2016058164A1/fr

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    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and a terminal for processing a voice service.
  • Wireless mobile communication network has experienced 2nd Generation mobile communication technology (2G), 3rd Generation mobile communication technology (3G) to 4th Generation mobile communication system (4th Generation mobile communication system) The evolution of technology, 4G).
  • the fourth generation mobile communication system adopts Long Term Evolution (LTE) access technology, and its access network is called Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • LTE Long Term Evolution
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • traditional services such as voice are provided by the Circuit Switch (CS) domain. Since the fourth generation mobile communication system has only a Packet Switch (PS) domain, there is no CS domain. Therefore, a mechanism is needed to implement traditional services such as voice.
  • PS Packet Switch
  • CSFB Circuit Switch Fallback
  • LTE terminals User Equipments, UEs
  • GSM Global System for Mobile Communications
  • an LTE multimode terminal usually resides in the E-UTRAN.
  • the terminal can fall back to the 2G/3G CS network by the LTE, and establish a voice service on the 2G/3G CS network.
  • the current terminal is dropped from the current network, such as LTE, to the first network according to the operator's policy, such as 3G. If the first network network is poor, the call quality is not good, and the terminal needs to further switch to the second network, such as 2G makes a call.
  • the second network such as 2G makes a call.
  • the embodiment of the invention provides a method and a terminal for processing a call, which can enhance the capability of the terminal to process a call.
  • an embodiment of the present invention provides a method for processing a call, where the method includes:
  • the terminal sends a first message, where the first message is used to request a CSFB voice service;
  • the terminal receives a second message, where the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to the first network supporting a CS voice service, where the current network is The first network is different;
  • the preset condition includes at least one of the following:
  • the cell ID belongs to a cell list saved in the terminal, and the cell list is used to save a cell ID of the first network when the terminal changes from the first network to the second network, Transformations include reselection, redirection, or switching;
  • the signal of the second network of the current network environment is better than the signal of the first network
  • the second network is pre-configured to preferentially select.
  • the method further includes: updating the cell list, and deleting a cell ID of the target cell that exceeds a validity period in the cell list.
  • the signal of the second network in the current network environment is better than the signal of the first network, including:
  • the signal strength of the first network of the cell ID is less than a threshold M, and the signal strength of the second network is greater than a threshold N, and N is greater than or equal to M.
  • the cell ID is a cell global ID or a cell physical ID
  • the terminal obtains a cell ID of the target cell of the first network according to the second message, including:
  • the terminal obtains, from the information, a cell physical ID of a target cell of the first network.
  • the sending the connection request to the base station of the second network includes:
  • the terminal searches for a frequency point of the second network that can be accessed, and sends the connection request to the base station of the second network according to the frequency point.
  • an embodiment of the present invention provides a terminal, where the terminal includes:
  • a sending module configured to send a first message, where the first message is used to request a CSFB voice service
  • a receiving module configured to receive a second message, where the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to the first network supporting a CS voice service, where the current The network is different from the first network;
  • An acquiring module configured to acquire, according to the information, a cell ID of a target cell of the first network
  • a processing module configured to determine, according to the cell ID, whether a preset condition is met, and if yes, send a connection request to a base station of a second network supporting the CS voice service to establish a CS connection, where the first network and the second The network is different.
  • the preset condition includes at least one of the following:
  • the terminal further includes a storage module, the cell ID belongs to a cell list saved in the storage module, and the cell list is used to save the terminal from the first network to the second network.
  • the cell ID of the first network the transformation includes reselection, redirection, or handover;
  • the signal of the second network of the current network environment is better than the signal of the first network
  • the second network is pre-configured to preferentially select.
  • the storage module updates the cell list, and deletes a cell ID of a target cell that exceeds a validity period in the cell list.
  • the signal of the second network in the current network environment is better than the signal of the first network, including:
  • the signal strength of the first network of the cell ID is less than a threshold M, and the signal strength of the second network is greater than a threshold N, and N is greater than or equal to M.
  • the cell ID is a cell global ID or a cell physical ID
  • the acquiring The module is specifically used to:
  • the processing module is specifically configured to:
  • an embodiment of the present invention provides a processor, where the processor is configured to perform the following operations:
  • the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to the first network supporting CS voice service, the current network and the first a different network;
  • the preset condition includes at least one of the following:
  • the cell ID belongs to the saved cell list, and the cell list is used to save the cell ID of the first network when the first network is transformed to the second network, where the transformation includes reselection and redirection. Or switch;
  • the signal of the second network of the current network environment is better than the signal of the first network
  • the second network is pre-configured to preferentially select.
  • the processor is further configured to update the cell list, and delete a cell ID of the target cell that exceeds a validity period in the cell list.
  • the signal of the second network in the current network environment is better than the signal of the first network, including:
  • the signal strength of the first network of the cell ID is less than a threshold M, and the signal strength of the second network is greater than a threshold N, and N is greater than or equal to M.
  • the cell ID is a cell global ID or a cell physical ID
  • the basis is The obtaining the cell ID of the target cell of the first network by using the information includes:
  • the sending the connection request to the second network includes:
  • the embodiment of the present invention provides a terminal, including: the processor, the transceiver, the memory, and the bus, according to any one of the third aspect to the fifth aspect,
  • the processor, the transceiver, and the memory according to any one of the fifth implementation of the third aspect are communicated by the bus;
  • the memory is for storing instructions
  • the transceiver is configured to receive a second message and send the message to the processor, where the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to support a CS voice service.
  • the first network, the current network is different from the first network;
  • the transceiver is further configured to send a connection request to the base station of the second network according to the control of the processor, so as to establish a CS connection.
  • the solution provided by the foregoing embodiment of the present invention obtains the cell ID of the target cell of the first network by using the information of the first network included in the second message, and sends a message to the base station of the second network when the preset condition is satisfied according to the cell ID.
  • the connection request can be implemented to access the second network according to a preset condition when the terminal is redirected, thereby enhancing the capability of the terminal to process the call.
  • FIG. 1 is a schematic diagram of a network system according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for processing a voice service according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of signaling interaction for processing a voice service according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal for processing a voice service according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic diagram of a hardware structure for processing a voice service terminal according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic block diagram of a processor disclosed in Embodiment 5 of the present invention.
  • the terminal involved in the present invention may also be referred to as a User Equipment (UE), etc., and the terminal may communicate with one or more core networks via a Radio Access Network (RAN).
  • the terminal may be a mobile terminal.
  • the terminal may be a mobile phone or other computer device having a mobile communication function.
  • the terminal may also be a portable, handheld, computer built-in or vehicle-mounted mobile device, and the wireless terminal.
  • the access network exchanges voice and/or data.
  • the terminal involved in the present invention may also be a processor or a processor plus necessary auxiliary circuits and auxiliary devices (for example, radio frequency chips).
  • the redirection means that the terminal disconnects from the current network and reconnects to other networks.
  • the redirection is a process in which the terminal first disconnects from the network to the idle state and then to the connected state. For example, when the terminal uses the current network for voice services, due to various factors, such as the current network signal is poor or the current network does not support related services, the connection with the current network is disconnected, and the network is reconnected to other networks to continue the service.
  • the reselection is an idle state, the terminal connects to the other network from the attached network. For example, when the terminal reselects from the first network to the second network, the terminal may be in the idle state, because the first network signal is not connected to the first network. Two networks.
  • Switching is when the terminal is in the connected state and the connection is attached to the network to connect to another network.
  • the process terminal of the handover does not disconnect from the network, and is always in a connected state, which is different from the network in which the redirected terminal first disconnects and then connects to another network.
  • the communication network architecture usually includes a UE, a Radio Access Network (RAN), and a Core Network (CN).
  • the RAN provides a radio access technology in which the UE is connected to the CN via the RAN.
  • An evolved Node B (evolved Node B, eNodeB or eNB) is a base station in LTE and belongs to a device in the 4G RAN. Compared with the Node B in the existing 3G, the eNB integrates the functions of a part of the Radio Network Controller (RNC), which reduces the level of the protocol at the time of communication.
  • the functions of the eNB include: Radio Resource Management (RRM) Function; Mobility Management Entity (MME) selection when the UE is attached; scheduled transmission of paging information; scheduled transmission of broadcast information; and setting and providing measurement of the eNB.
  • RRM Radio Resource Management
  • MME Mobility Management Entity
  • the MME is a key control node of the 3rd Generation Partnership Project (3GPP) protocol LTE access network and belongs to devices in the 4G CN. It is responsible for the positioning of the UE in idle mode, the paging process. Simply put, the MME is responsible for the signaling processing part.
  • the functions of the MME include access control, including security and admission control; mobility management, support for E-UTRAN-capable user access networks, which ensures MME tracking and recording of the current location of the UE; session management functions, including The establishment, modification and release of the Evolved Packet Core (EPC) bearer; establishment and release of the bearer with the access network.
  • EPC Evolved Packet Core
  • the Radio Network Subsystem belongs to the 3G RAN, such as a device in the UMTS Terrestrial Radio Access Network (UTRAN).
  • the RNS includes a Radio Network Controller (RNC) that controls radio resources in the access network.
  • RNC has macro-diversity and capabilities to provide soft handoff capabilities.
  • Each RNC can cover multiple NodeBs.
  • a NodeB is essentially a logical entity equivalent to a base transceiver station that is controlled by the RNC to provide physical wireless link connections between the UE and the Radio Network Subsystem (RNS).
  • Base Station Sub-system also known as base station equipment, is an important component of Global System for Mobile Communication (GSM) and belongs to 2G RAN, such as GSM/Enhanced Data Rate GSM Evolution.
  • GSM Global System for Mobile Communication
  • the base station subsystem includes a Base Transceiver Station (BTS), a Base Station Controller (BSC), and the like.
  • BSS is the most direct and essential part of the relationship between wireless communication networks in mobile communication systems. In the entire mobile network, the base station of the BSS mainly acts as a relay.
  • a wireless channel connection is used between the base station and the base station, and is responsible for wireless transmission, reception, and radio resource management.
  • the main base station and the Mobile Switching Center (MSC) often use a wired channel connection.
  • a communication connection between mobile users or between mobile users and fixed users is achieved.
  • the MSC is a device in the 2G/3G CN.
  • the MSC can directly provide or interface with the fixed network of the public switched telephone network, the integrated service digital network, and the public data network through the gateway mobile switching center, and interconnect the mobile users with the mobile users, mobile users, and fixed network users.
  • Embodiment 1 of the present invention provides a method for processing a voice service. As shown in FIG. 2, the method 100 can be performed by a terminal. The method 100 includes:
  • the terminal sends a first message, where the first message is used to request that the circuit domain fall back to the CSFB voice service.
  • the terminal receives a second message, where the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to the first network supporting a circuit switched CS voice service.
  • the current network is different from the first network;
  • the terminal acquires a cell ID of a target cell of the first network according to the information.
  • the terminal determines, according to the cell ID, whether a preset condition is met. If yes, sending, by the base station of the second network supporting the CS voice service, a connection request, to establish a CS connection, where the first network and the second The network is different.
  • the current network and the first network respectively represent different networks, such as the current network represents a 4G network, and the first network represents a 3G network or a 2G network.
  • the current network may be different from the first network in that the current network is different from the radio access technology (RAT) of the first network.
  • the first network and the second network respectively represent different networks, and the first network and the second network may respectively represent a 2G network and a 3G network, such as the first network represents a 2G network, the second network represents a 3G network; or the first network representation A 3G network, and a second network represents a 2G network.
  • the first network may be different from the second network in that the first network is different from the radio access technology (RAT) of the second network.
  • RAT radio access technology
  • the terminal initiates a call or a called, if the current network attached to the terminal
  • the network does not have a CS domain, such as 4G, and the terminal sends a first message to the current network, where the first message is used to request CSFB voice service; after the current network receives the first message, the access network base station of the current network, such as an eNodeB, A second message is sent to the terminal, the second message indicating that the terminal is redirected from the current network to the first network, the current network being different from the first network.
  • the terminal sends a connection request to the base station of the second network supporting the CS voice service, so as to establish a CS connection, wherein the establishing the CS connection may be after the terminal establishes a connection with the second network base station, further to the second
  • the core network of the network sends a connection request, accesses the second network, establishes a CS connection, and continues the voice service.
  • the second message received by the terminal such as an RRC Connection Release message or a Cell Change Order (CCO) message
  • the second message includes information of the first network, where the information Used for the terminal to redirect from the current network to the first network.
  • the information includes a frequency point of the target cell of the first network, and indicates that the terminal can be redirected from the current network to the first network by using the frequency point.
  • the frequency point refers to a specific frequency value.
  • the information may further include system information of the target cell, where the system information may include a cell global ID of the target cell, where the global ID of the cell is a global unique identifier of the target cell, and the device may be uniquely identified.
  • the cell ID of the target cell, the access network and the core network of the first network can identify the target cell by using the cell global ID (cellGlobalId).
  • the information may further include a cell physical ID (PCI) of the target cell, where the cell physical ID is a cell ID of the physical layer, and is a cell identifier that interacts with the physical layer channel signal when the terminal connects with the base station of the first network, and the inter-cell
  • PCI cell physical ID
  • the scrambling form is also related to the physical ID of the cell to avoid cell interference.
  • the cell physical ID is different from the cell global ID (cellGlobalId), and cannot uniquely identify the cell ID of the target cell.
  • the core network of the first network cannot pass the cell.
  • the physical ID uniquely identifies the target cell.
  • the cell ID of the target cell may be a cell global ID or a cell physical ID.
  • Obtaining, by the terminal, the cell ID of the target cell of the first network according to the information includes:
  • the system information corresponding to the frequency point acquires a cell global ID of the target cell of the first network from the system information.
  • the terminal may acquire system information corresponding to the frequency point according to the frequency point of the first network in the information; optionally, the terminal may further refer to the first part in the information.
  • the terminal obtains, from the information, a cell physical ID of a target cell of the first network.
  • the base station sends a broadcast message to the corresponding cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the terminal may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the terminal may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the information of the first network, and obtain a target of the first network from the system information.
  • the global ID of the cell of the cell is a broadcast message to the corresponding cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the terminal may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the terminal may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first
  • the terminal when the terminal determines, according to the cell ID of the target cell of the first network, that the preset condition is met, the terminal searches for the frequency of the second network that can be accessed, according to the second accessible The frequency of the network sends a connection request to the second network to facilitate establishing a CS connection.
  • the preset condition may include:
  • the cell ID of the target cell belongs to a cell ID list saved in the terminal, and the cell ID list is used to save the first network when the terminal changes from the first network to the second network.
  • Cell ID the transformation including reselection, redirection or handover.
  • the signal of the first network of the current network environment is better than the signal of the second network.
  • Place The signal of the first network is better than the signal of the second network, that is, the signal quality of the signal of the first network is higher than the signal quality of the signal of the second network, and the stability of the signal of the first network may be higher or The signal strength is stronger and so on.
  • the signal of the first network of the current network environment that is better than the signal of the second network may be the signal of the first network corresponding to the cell ID of the target cell in the information of the first network included in the second message.
  • the intensity is less than the threshold M
  • the signal strength of the second network is greater than the threshold N
  • N is greater than or equal to M.
  • Pre-configured to preferentially select the second network refers to considering the second network first, and when the second network cannot meet the requirement, selecting another network.
  • the requirement that the requirement cannot be met may not meet the requirements for establishing a connection of the network or some requirements of the terminal setting, and the present invention is not limited to the requirements.
  • the preset condition may be at least one of the above conditions A, B, and C.
  • the preset condition is two or more than two, the preset condition satisfies the meaning that all the preset conditions are satisfied, or at least one of the preset conditions is satisfied.
  • the determination of the preset condition is added, and when the preset condition is met, the second network is selected to be accessed, and the efficiency of the terminal to be redirected is further ensured, and the terminal is directly redirected according to the second message.
  • the probability of switching to the second network again due to factors such as the first network signal difference.
  • the thresholds M and N may be a certain value between -90 dBm and -60 dBm, and the thresholds M and N may be two identical values, or may be two different values.
  • the method further includes updating the cell list, and deleting the cell ID of the cell list that exceeds the validity period. If the validity period is 8 hours, the cell ID record stored in the cell list for more than 8 hours is automatically deleted. The cell list is updated in real time to ensure the effectiveness of the cell list, which can further improve the efficiency of terminal redirection.
  • determining, by the terminal, that the preset condition A is satisfied according to the cell ID includes: confirming that the cell ID is recorded in the cell list. Specifically, after the terminal acquires the cell ID of the target cell according to the information, the cell searches for the cell ID in the cell list, and if the cell ID exists in the cell list, the preset condition A is satisfied.
  • the information may include multiple frequency points, and when at least one of the cell IDs corresponding to the multiple frequency points belongs to the cell list, the preset condition A is satisfied.
  • the redirection record redirected from the first network to the second network may further include a frequency of the redirected second network corresponding to the target cell ID, where the terminal is according to the second accessible
  • sending, by the frequency of the network, the connection request to the second network where the method may include: searching, by the terminal, the frequency of the accessible second network redirected by the cell ID in the cell list, according to the second network frequency point
  • the second network sends a connection request.
  • determining, by the terminal, that the preset condition B is satisfied according to the cell ID includes: confirming that a signal strength of the first network of the cell ID is less than a threshold M, and a signal strength of the second network is greater than The threshold N, N is greater than or equal to M. If the signal strengths of the first network and the second network of the cell ID are not measured before the second message is received, the correlation signal strengths of the first network and the second network are measured first.
  • the M and N ranges from -90 dBm to -60 dBm.
  • M is -90 dBm and N is -60 dBm, that is, if the signal strength of the first network is less than -90 dBm and the signal strength of the second network is greater than -60 dBm
  • the preset condition B is satisfied. If both M and N are -60 dBm, that is, if the signal strength of the first network is less than -60 dBm and the signal strength of the second network is greater than -60 dBm, the preset condition B is satisfied.
  • the information of the second network may include multiple frequency points, and the signal strength of the first network of the cell ID corresponding to each frequency point is first determined to be less than a threshold value M, if the multiple corresponding to the multiple cell IDs If the signal strength of the network is less than the threshold M, the signal strength of the second network is measured; if the signal strength of the first network corresponding to at least one of the plurality of cells is greater than the threshold M, the preset condition B is not satisfied. .
  • determining, by the terminal, that the preset condition C is satisfied according to the cell ID includes: when the terminal receives the second message, acquiring the target according to the information in the second message The cell ID of the cell, if the cell ID of the target cell belongs to a target cell category in which the terminal is pre-configured to preferentially select the second network, the preset condition C is satisfied.
  • the terminal pre-configured to preferentially select the second network may include the cell ID voice service request pre-configured by all or part of the target cell to preferentially select the second network.
  • the first network sends a connection request to establish a call on the first network.
  • the information in the second message received by the terminal may include a frequency point of a first network that is redirected, and obtain a target cell ID according to the first network frequency point, and determine the foregoing pre-determination according to the cell ID. If the condition is not satisfied, determining whether the signal strength of the frequency of the first network meets the minimum requirement for the voice service to fall back, and if yes, sending the frequency of the first network to the first network.
  • Connection request if not, search for other network signals of the cell or access network signals of nearby cells.
  • the method for sending a connection request to the first network of the target cell according to the frequency of the first network in the information included in the second message, and the method for establishing a call in the first network is not limited.
  • the information of the first network included in the second message may include multiple first network frequency points, such as three or five first network frequency points.
  • first network frequency points such as three or five first network frequency points.
  • the method for processing a call provided by the embodiment, after receiving the second message, the terminal acquires the cell ID of the target cell according to the information in the second message, and determines, according to the cell ID, that the preset condition is satisfied, The second network sends a connection request, and can implement access to the second network according to a preset condition when the terminal is redirected, thereby enhancing the capability of the terminal to process the call.
  • Embodiment 2 of the present invention provides a method for processing a call. Processing call provided by the embodiment of the present invention
  • the calling method applies to both the calling terminal and the called terminal, and the selection of the calling terminal redirection network is independent of the selection of the called terminal redirection network.
  • the terminal sends a first message, where the first message is used to request a CSFB voice service, such as an Extended Service Request message, and the terminal receives a second message, such as an RRC Connection Release, where the second message includes the first message.
  • a CSFB voice service such as an Extended Service Request message
  • the information is used by the terminal to redirect from the current network to the first network supporting the CS voice service, where the current network is different from the first network; and the information indicating that the redirect is indicated in the information a cell ID of the target cell of the first network; when determining that the preset condition is satisfied according to the cell ID, sending a connection request to a base station of the second network, such as a base station of the 2G, according to a frequency point of the second network that can be accessed In order to establish a CS connection, the first network is different from the second network.
  • the facilitating the establishment of the CS connection may be after the terminal establishes a connection with the second network base station, further sending a connection request to the core network of the second network, accessing the second network, establishing a CS connection, and continuing Voice business.
  • the first network and the second network respectively represent different networks, and the first network and the second network may respectively represent a 2G network and a 3G network, for example, the first network represents a 2G network, and the second network represents a 3G network; or One network represents a 3G network, and the second network represents a 2G network.
  • the first network and the second network provide the same service, and the providing the same service is to provide at least a part of the same service.
  • the first network and the second network provide at least a voice service of the CS domain, so as to implement redirection when the terminal performs voice service.
  • FIG. 3 is a schematic diagram of signaling interaction initiated by a 4G network terminal, and specifically includes:
  • the terminal sends a first message, such as an Extended Service Request message, to the MME by using the eNodeB, where the first message is used to request a CSFB voice service.
  • the Extended Service Request message belongs to a Non-Access Stratum (NAS) message.
  • the MME sends an S1-AP UE CONTEXT MODIFICATION REQUEST message to the eNodeB according to the S1-AP protocol.
  • the message carries a CSFB indication to inform the eNodeB that the terminal initiates a CSFB service request.
  • the eNodeB After receiving the S1-AP UE CONTEXT MODIFICATION REQUEST message, the eNodeB sends an S1-AP UE CONTEXT MODIFICATION RESPONSE response message to the MME.
  • the eNodeB requests the terminal to send a signal measurement report, and the terminal measures the signal strength of each frequency point of the nearby accessible cell, and reports the signal strength to the eNodeB; if the eNodeB is configured with the frequency of the nearby cell Distribution and access policies eliminate the need for the terminal to measure and send signal measurement reports.
  • the eNodeB sends a second message, such as an RRC Connection Release message, to the terminal to redirect the terminal to the 2G/3G network, where the message carries the frequency of the first network indicating the redirection. .
  • the frequency of the redirected first network carried in this message may be one or more.
  • the eNodeB sends an S1-AP:S1UE Context Release Request message to the MME, requesting to release the UE context connection established with the MME, that is, releasing the S1 interface.
  • the eNodeB releases the UE context connection established with the MME, that is, performs an operation of releasing the S1 interface.
  • the terminal processes the call.
  • a second message such as an RRC Connection Release message
  • the second message includes information of the first network, where the information is used by the terminal to redirect from the current network to the first network supporting CS voice service,
  • the current network is different from the first network.
  • the terminal acquires a cell ID of the target cell of the first network according to the information, and determines, according to the cell ID, whether a preset condition is met. If yes, the frequency of the second network is searched, for example, searching for a frequency point that the 2G can access, and sending a connection request to the second network at the frequency to facilitate establishing a CS connection.
  • the terminal After obtaining the frequency of the 3G network of the information, acquires the system information corresponding to the frequency point, and obtains the global ID of the target cell of the first network, that is, the target cell, from the system information. a cell ID, searching whether the cell ID belongs to a cell ID list saved in the terminal, where the cell ID list is used to save the terminal from the first network to the second In the network, the cell ID of the first network, the transformation includes reselection, redirection or handover. If it belongs, the terminal searches for 2G to access the frequency point, and sends a connection request to the 2G network at the 2G frequency point to establish a connection.
  • the information of the first network in the second message includes a frequency point of the target cell of the first network, and indicates that the terminal can be redirected from the current network to the first network by using the frequency point.
  • the frequency point refers to a specific frequency value.
  • the information may further include system information of the target cell, where the system information may include a cell global ID of the target cell, where the global ID of the cell is a global unique identifier of the target cell, and the device may be uniquely identified.
  • the cell ID of the target cell, the access network and the core network of the first network can identify the target cell by using the cell global ID (cellGlobalId).
  • the information may further include a cell physical ID (PCI) of the target cell, where the cell physical ID is a cell ID of the physical layer, and is a cell identifier that interacts with the physical layer channel signal when the terminal connects with the first network base station, and the inter-cell plus
  • PCI cell physical ID
  • the scrambling format is also related to the physical ID of the cell to avoid cell interference.
  • the cell physical ID is different from the cell global ID (cellGlobalId), and cannot uniquely identify the cell ID of the target cell. For example, the core network of the first network cannot pass the cell physical ID. Uniquely identify the target cell.
  • the cell ID of the target cell may be a cell global ID or a cell physical ID.
  • Obtaining, by the terminal, the cell ID of the target cell of the first network according to the information about the first network includes:
  • the terminal may acquire system information corresponding to the frequency point according to the frequency point of the first network in the information of the first network; optionally, the terminal may further be according to the first Obtaining a frequency point of the target cell of the first network and other information, such as a cell physical ID, in the information of the network, acquiring system information corresponding to the frequency point; or
  • the terminal obtains a cell physical ID of a target cell of the first network from information of the first network.
  • the base station sends a broadcast message to the corresponding cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the terminal may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the terminal may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the second message, and obtain a target cell of the first network from the system information.
  • Community Global ID the system information of the target cell at the frequency of each cell
  • the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the terminal may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the terminal may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the second message, and obtain a target
  • the terminal when the terminal determines, according to the cell ID of the target cell of the first network, that the preset condition is met, the terminal searches for the frequency of the second network that can be accessed, according to the second accessible The frequency of the network sends a connection request to the second network to establish a call on the second network.
  • the preset condition may include:
  • the cell ID of the target cell belongs to a cell ID list saved in the terminal, and the cell ID list is used to save the first when the terminal changes from the first network to the second network.
  • the cell ID of the network the transformation including reselection, redirection or handover.
  • the current network environment first network signal is better than the second network signal.
  • the signal of the first network is better than the signal of the second network, that is, the signal quality of the signal of the first network is higher than the signal quality of the signal of the second network, and the stability of the signal of the first network may be higher. Or signal strength is stronger.
  • the signal of the first network in the current network environment is better than the signal of the second network, where the signal strength of the first network corresponding to the cell ID of the target cell in the second message is less than a threshold value M, The signal strength of the two networks is greater than the threshold N, and N is greater than or equal to M.
  • Pre-configured to preferentially select the second network refers to considering the second network first, and when the second network cannot meet the requirement, selecting another network. Wherein, the failure to meet the requirement may not meet the requirements for establishing a connection of the network or certain requirements of the terminal setting, etc.
  • the invention is not limited to the described requirements.
  • the preset condition may be at least one of the above conditions A, B, and C.
  • the preset condition is two or more than two, the preset condition satisfies the meaning that all the preset conditions are satisfied, or at least one of the preset conditions is satisfied.
  • the determination of the preset condition is added, and when the preset condition is met, the second network is selected to be accessed, and the efficiency of the terminal to be redirected is further ensured, and the terminal is directly redirected according to the second message. After the first network, the probability of switching to the second network again due to factors such as the first network signal difference.
  • the thresholds M and N may be a certain value between -90 dBm and -60 dBm, and the thresholds M and N may be two identical values, or may be two different values.
  • the terminal further updates the cell list, and deletes the target cell ID that exceeds the validity period in the cell list. If the validity period is 8 hours, the cell ID record stored in the cell list for more than 8 hours is automatically deleted.
  • the cell list is updated in real time to ensure the effectiveness of the cell list, which can further improve the efficiency of terminal redirection.
  • determining, by the terminal, that the preset condition A is satisfied according to the cell ID includes: confirming that the cell ID is recorded in the cell list. Specifically, after the terminal acquires the cell ID of the target cell according to the second message, the cell searches for the cell ID in the cell list, and if the cell ID exists in the cell list, the preset condition A is satisfied.
  • the second message may include multiple frequency points, and when at least one cell ID of the cell ID corresponding to the multiple frequency points belongs to the cell list, the preset condition A is satisfied.
  • the redirection record redirected from the first network to the second network may further include a frequency of the redirected second network corresponding to the target cell ID, where the terminal is according to the second accessible
  • sending, by the frequency of the network, the connection request to the second network where the method may include: searching, by the terminal, the frequency of the accessible second network redirected by the cell ID in the cell list, according to the second network frequency point
  • the second network sends a connection request.
  • determining, by the terminal, that the preset condition B is satisfied according to the cell ID includes: confirming that a signal strength of the first network of the cell ID is less than a threshold M, and a signal strength of the second network is greater than The threshold N, N is greater than or equal to M. If the signal strengths of the first network and the second network of the cell ID are not measured before the second message is received, the correlation signal strengths of the first network and the second network are measured first.
  • the M and N ranges from -90 dBm to -60 dBm.
  • M is -90 dBm and N is -60 dBm, that is, if the signal strength of the first network is less than -90 dBm and the signal strength of the second network is greater than -60 dBm
  • the preset condition B is satisfied. If both M and N are -60 dBm, that is, if the signal strength of the first network is less than -60 dBm and the signal strength of the second network is greater than -60 dBm, the preset condition B is satisfied.
  • the information of the first network in the second message may include multiple frequency points, and first, according to the need, whether the signal strength of the first network of the cell ID corresponding to each frequency point is less than a threshold value M, if the multiple cells are If the signal strength of the first network corresponding to the ID is less than the threshold M, the signal strength of the second network is measured; if the signal strength of the first network corresponding to the at least one cell ID of the multiple cells is not less than the threshold M, The preset condition B is not satisfied.
  • the determining, by the terminal, that the preset condition C is satisfied according to the cell ID includes: when the terminal receives the second message, acquiring a cell ID of the target cell according to the second message, if the target cell The cell ID belongs to a target cell category in which the terminal is preconfigured to preferentially select the second network, and the preset condition C is satisfied.
  • the terminal pre-configured to preferentially select the second network may include the cell ID voice service request pre-configured by all or part of the target cell to preferentially select the second network.
  • the first network sends a connection request to establish a call on the first network.
  • the second message received by the terminal may include a frequency point of the first network that is redirected, and the cell ID of the target cell is obtained according to the first network frequency point, and if the preset condition is not determined according to the cell ID, If yes, it is determined whether the signal strength of the frequency of the first network meets the minimum of the voice service fallback resident
  • the request if achievable, sends a connection request to the first network according to the frequency of the first network; if not, searches for other network signals of the cell or an accessible network signal of a nearby cell.
  • the method for sending a connection request to the first network of the target cell according to the frequency of the first network in the second message, and the method for establishing a call in the first network the present invention is only illustrated by way of example and not limitation.
  • the second message may include multiple first network frequency points, such as three or five first network frequency points.
  • the preset condition is determined according to the cell ID of the target cell corresponding to each first network frequency point, and the determination method is the same as the above, and the description is not repeated.
  • the terminal performs a Location Area Update (LAU) on the second network, such as 2G.
  • LAU Location Area Update
  • the terminal sends a connection management service request (CM Service Request) message to the MSC through the BSS/RNS, and initiates a call control voice service request.
  • CM Service Request is a message in the Layer 3 network protocol of the air interface protocol stack.
  • the MSC rejects the service request message; after receiving the reject response of the service request, the terminal initiates a location update request. If the MSC does not change, the MSC receives the service request message and sends an acceptance response message for the service request to the terminal.
  • the terminal establishes a CS voice service, which is the same as the existing CS voice service process, and will not be described in detail later.
  • the method for processing a call provided by the embodiment, after receiving the second message, the terminal acquires the cell ID of the target cell according to the second message, and determines, according to the cell ID, that the preset condition is satisfied, to the second network.
  • Sending a connection request can implement access to the second network according to preset conditions when the terminal is redirected, which enhances the ability of the terminal to process the call.
  • Embodiment 3 of the present invention provides a terminal 300, which is shown in FIG. 4, and is used to perform the methods of Embodiment 1 and Embodiment 2. All the solutions and features that can be implemented in Embodiment 1 and Embodiment 2 are provided. Applicable to this embodiment, and details are not described herein again.
  • This terminal 300 includes:
  • the sending module 302 is configured to send a first message, where the first message is used to request a CSFB voice service;
  • the receiving module 304 is configured to receive a second message, where the second message includes information of the first network, where the information is used by the terminal to redirect from the current network to the first network supporting CS voice service, The current network is different from the first network;
  • An obtaining module 306, configured to acquire, according to the information, a cell ID of a target cell of the first network
  • the processing module 308 is configured to determine, according to the cell ID, whether the preset condition is met, and if yes, send a connection request to the base station of the second network supporting the CS voice service to establish a CS connection, where the first network and the first The two networks are different.
  • first network and the second network respectively represent different networks
  • first network and the second network may respectively represent a 2G network and a 3G network
  • first network represents a 2G network
  • second network represents a 3G network
  • One network represents a 3G network
  • second network represents a 2G network
  • the first network and the second network provide the same service, and the providing the same service is to provide at least a part of the same service.
  • the first network and the second network provide at least a voice service of the CS domain, so as to implement redirection when the terminal performs voice service.
  • the terminal initiates a call or a called party. If the current network attached to the terminal does not have a CS domain, such as 4G, the terminal sends a first message to the current network, where the first message is used to request CSFB voice. After the current network receives the first message, the access network base station of the current network, such as the eNodeB, sends a second message to the terminal, where the second message indicates that the terminal is from the current The network is redirected to the first network, which is different from the first network.
  • a CS domain such as 4G
  • the receiving, by the module, the second message, such as an RRC Connection Release message or a CCO (cell change order) message the second message includes information of the first network, where The information is used to instruct the terminal 300 to redirect from the current network to the first network.
  • the information includes a frequency point of a target cell of the first network, and indicates that the terminal 300 can be redirected from the current network to the first network by using the frequency point.
  • the frequency point refers to a specific frequency value.
  • the information may further include system information of the target cell, where the system information may include a cell global ID of the target cell, where the global ID of the cell is a global unique identifier of the target cell, and the device may be uniquely identified.
  • the cell ID of the target cell, the access network and the core network of the first network can identify the target cell by using the cell global ID (cellGlobalId).
  • the information may further include a cell physical ID (PCI) of the target cell, where the cell physical ID is a cell ID of the physical layer, and is a cell identifier that interacts with the physical layer channel signal when the terminal connects with the base station of the first network, and the inter-cell
  • PCI cell physical ID
  • the scrambling form is also related to the physical ID of the cell to avoid cell interference.
  • the cell physical ID is different from the cell global ID (cellGlobalId), and cannot uniquely identify the cell ID of the target cell.
  • the core network of the first network cannot pass the cell.
  • the physical ID uniquely identifies the target cell.
  • the cell ID of the target cell may be a cell global ID or a cell physical ID.
  • Obtaining, by the acquiring module, the cell ID of the target cell of the first network according to the information includes:
  • the terminal may acquire system information corresponding to the frequency point according to the frequency point of the first network in the information; optionally, the terminal may further refer to the first part in the information.
  • the base station sends a broadcast message to the corresponding cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the acquiring module may acquire the cell ID of the corresponding target cell from the broadcast message. Therefore, the acquiring module may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the second message, and obtain a target cell of the first network from the system information.
  • the global ID of the community is the system information of the target cell corresponding to the frequency point.
  • the processing module when the processing module determines, according to the cell ID of the target cell of the first network, that the preset condition is met, the processing module searches for a frequency point of the accessible second network, according to the accessible The frequency of the second network sends a connection request to the second network to establish a call on the second network.
  • the preset condition may include:
  • the cell ID of the target cell belongs to a cell ID list saved in the terminal, and the cell ID list is used to save the first when the terminal changes from the first network to the second network.
  • the cell ID of the network the transformation including reselection, redirection or handover.
  • the signal of the second network of the current network environment is better than the signal of the first network.
  • the signal of the first network is better than the signal of the second network, that is, the signal quality of the signal of the first network is higher than the signal quality of the signal of the second network, and the stability of the signal of the first network may be higher. Or signal strength is stronger.
  • the signal of the first network in the current network environment is better than the signal of the second network, where the signal strength of the first network corresponding to the cell ID of the target cell in the second message is less than a threshold value M, The signal strength of the two networks is greater than the threshold N, and N is greater than or equal to M.
  • the preferentially selecting the second network refers to considering the second network first, and when the second network cannot meet the requirement, selecting another network. Among them, The requirement that the requirements are not met may not satisfy the requirements for establishing a connection of the network or some requirements of the terminal setting, and the present invention is not limited to the requirements.
  • the preset condition may be at least one of the above conditions A, B, and C.
  • the preset condition is two or more than two, the preset condition satisfies the meaning that all the preset conditions are satisfied, or at least one of the preset conditions is satisfied.
  • the determination of the preset condition is added, and when the preset condition is met, the second network is selected to be accessed, and the efficiency of the terminal to be redirected is further ensured, and the terminal is directly redirected according to the second message. After the first network, the probability of switching to the second network again due to factors such as the first network signal difference.
  • the thresholds M and N may be a certain value between -90 dBm and -60 dBm, and the thresholds M and N may be two identical values, or may be two different values.
  • the terminal 300 further includes a storage module that saves the cell list.
  • the storage module further updates the cell list, and deletes the target cell ID that exceeds the validity period in the cell list. If the validity period is 8 hours, the cell ID record stored in the cell list for more than 8 hours is automatically deleted.
  • the cell list is updated in real time to ensure the effectiveness of the cell list, which can further improve the efficiency of terminal redirection.
  • determining, by the processing module, that the preset condition A is satisfied according to the cell ID of the target cell includes: confirming that the cell ID is recorded in a cell list of the storage module. Specifically, after the acquiring module acquires the cell ID of the target cell according to the information, the processing module searches for the cell ID in the cell list, and if the cell ID exists in the cell list, the preset condition A is satisfied.
  • the information may include multiple frequency points, and when at least one of the cell IDs corresponding to the multiple frequency points belongs to the cell list, the preset condition A is satisfied.
  • the redirection record redirected from the first network to the second network may further include a frequency of the redirected second network corresponding to the target cell ID, and the processing module is connected according to the The sending, by the processing module, the frequency of the second network to the second network, the processing module searches for the frequency of the accessible second network redirected by the cell ID in the cell list, according to the second network.
  • the frequency point sends a connection request to the second network.
  • the processing, by the processing module, determining, according to the cell ID, that the preset condition B is satisfied includes: confirming that the signal strength of the first network of the cell ID is less than a threshold M, and the signal strength of the second network Greater than the threshold N, N is greater than or equal to M.
  • the terminal further includes a measurement module, if the signal strength of the first network and the second network of the cell ID is not measured before the receiving module receives the second message, the measurement module first applies to the first network and the first The correlation signal strength of the two networks is measured.
  • the M and N ranges from -90 dBm to -60 dBm.
  • M is -90 dBm and N is -60 dBm, that is, if the signal strength of the first network is less than -90 dBm and the signal strength of the second network is greater than -60 dBm
  • the preset condition B is satisfied. If both M and N are -60 dBm, that is, if the signal strength of the first network is less than -60 dBm and the signal strength of the second network is greater than -60 dBm, the preset condition B is satisfied.
  • the information may include multiple frequency points, and first, if necessary, whether the signal strength of the first network corresponding to the cell ID corresponding to each frequency point is less than a threshold value M, if the multiple network ID corresponds to the first network If the signal strength is less than the threshold M, the signal strength of the second network is measured; if the signal strength of the first network corresponding to at least one of the plurality of cells is greater than the threshold M, the preset condition B is not satisfied.
  • the determining, by the processing module, that the preset condition C is satisfied according to the cell ID includes: acquiring a cell ID of the target cell, and if the cell ID of the target cell belongs to the terminal, the target of the second network is preferentially configured. In the case of the cell category, the preset condition C is satisfied.
  • the terminal pre-configured to preferentially select the second network may include the cell ID voice service request pre-configured by all or part of the target cell to preferentially select the second network.
  • the sending module determines that the preset condition is not satisfied according to the cell ID of the target cell, the redirecting the frequency of the first network to the first network of the target cell according to the information
  • a connection request is sent to establish a call on the first network.
  • the second message received by the receiving module includes a frequency point of a first network that is redirected, and is obtained according to the frequency of the first network.
  • the processing module determines whether the signal strength of the frequency of the first network meets the minimum requirement for the voice service to fall back, if the achievable And sending a connection request to the first network according to the frequency of the first network; if not, searching for other network signals of the cell or an accessible network signal of a nearby cell.
  • the method for sending a connection request to the first network of the target cell according to the frequency of the first network in the second message, and the method for establishing a call in the first network the present invention is only illustrated by way of example and not limitation.
  • the information may include multiple first network frequency points, such as three or five first network frequency points.
  • first network frequency points such as three or five first network frequency points.
  • the terminal after receiving the second message, the terminal acquires the cell ID of the target cell according to the information, and sends a connection to the second network when the preset condition is satisfied according to the cell ID.
  • the request can be implemented to access the second network according to a preset condition when the terminal is redirected, thereby enhancing the capability of the terminal to process the call.
  • each module of the foregoing terminal may be implemented by one or more hardware or software modules of the actual product, and the specific implementation thereof does not constitute a limitation of the present invention.
  • FIG. 6 shows a specific embodiment of the processor.
  • the receiving module 301 and the obtaining module 302 of the terminal may be implemented by an access layer. Specifically, if the receiving module receives the second message and the acquiring module acquires the cell ID of the target cell of the first network according to the information of the first network included in the second message, the cell ID of the target cell in the processor of FIG. 6 may be implemented.
  • the access layer can implement connection and interaction between the terminal 300 and the access network base station.
  • the processing module 306 may be implemented by the non-access stratum.
  • the processing module determines whether the preset condition is met according to the cell ID. If yes, the access layer is instructed to send a connection request to the base station of the second network. It is understood that the foregoing processing module 306 can be implemented by the non-access stratum and the access layer. Specifically, if the non-access stratum determines whether the preset condition is met according to the cell ID, if the content is satisfied, the access layer is to the second network. The base station sends a connection request. It should be understood that each unit or subunit in FIG. 6 (eg, the above-mentioned non-access stratum, access layer, etc.) is a module/program having a corresponding function.
  • the terminal 300 may correspond to the terminal in the foregoing communication method, and the operations and/or functions of the respective modules in the terminal 300 respectively implement corresponding processes of the respective methods in FIG. 1 to FIG. For the sake of brevity, it will not be repeated here.
  • a computer readable medium comprising computer readable instructions that, when executed, perform the operations of 102 to 106 of the methods in the above embodiments. Alternatively, the operations of the optional steps in the method in the above embodiments may also be performed.
  • a computer program product including the computer readable medium described above.
  • a terminal of the fourth embodiment of the present invention is also shown in FIG. 5 .
  • Terminal 400 includes a processor 402, a memory 404, a transceiver 406, and a bus 408.
  • the processor 402, the memory 404, and the transceiver 406 communicate via the bus 408.
  • the transceiver 406 is configured to send a first message, where the first message is used to request a CSFB voice service;
  • the transceiver 406 is further configured to receive a second message, where the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to the first network supporting CS voice service, The current network is different from the first network;
  • the processor 402 is configured to acquire, according to the information, a cell ID of a target cell of the first network, determine, according to the cell ID, whether a preset condition is met, and if yes, control the transceiver 406 to support a CS voice service.
  • the base station of the network sends a connection request in order to establish a CS connection, the first network being different from the second network.
  • the current network and the first network respectively represent different networks, such as the current network represents a 4G network, and the first network represents a 3G network or a 2G network.
  • the current network may be different from the first network in that the current network is different from the radio access technology (RAT) of the first network.
  • the first network and the second network respectively represent different networks, and the first network and the second network respectively represent a 2G network and a 3G network, for example, the first network represents a 2G network, and the second network represents 3G network; or the first network represents a 3G network, and the second network represents a 2G network.
  • the first network may be different from the second network in that the first network is different from the radio access technology (RAT) of the second network.
  • RAT radio access technology
  • the terminal initiates a call or a called party. If the current network attached to the terminal does not have a CS domain, such as 4G, the terminal sends a first message to the current network, where the first message is used to request CSFB voice. After the current network receives the first message, the access network base station of the current network, such as the eNodeB, sends a second message to the terminal, where the second message indicates that the terminal is redirected from the current network to the first network. The current network is different from the first network.
  • a CS domain such as 4G
  • the second message received by the terminal such as an RRC Connection Release message or a Cell Change Order (CCO) message
  • the second message includes information of the first network, where the information Used for the terminal to redirect from the current network to the first network.
  • the information includes a frequency point of the target cell of the first network, and indicates that the terminal can be redirected from the current network to the first network by using the frequency point.
  • the frequency point refers to a specific frequency value.
  • the information may further include system information of the target cell, where the system information may include a cell global ID of the target cell, where the global ID of the cell is a global unique identifier of the target cell, and the device may be uniquely identified.
  • the cell ID of the target cell, the access network and the core network of the first network can identify the target cell by using the cell global ID (cellGlobalId).
  • the information may further include a cell physical ID (PCI) of the target cell, where the cell physical ID is a cell ID of the physical layer, and is a cell identifier that interacts with the physical layer channel signal when the terminal connects with the base station of the first network, and the inter-cell
  • PCI cell physical ID
  • the scrambling form is also related to the physical ID of the cell to avoid cell interference.
  • the cell physical ID is different from the cell global ID (cellGlobalId), and cannot uniquely identify the cell ID of the target cell.
  • the core network of the first network cannot pass the cell.
  • the physical ID uniquely identifies the target cell.
  • the cell ID of the target cell may be a cell global ID or a cell physical ID.
  • the obtaining, by the processor 402, the cell ID of the target cell of the first network according to the information includes:
  • the terminal may acquire system information corresponding to the frequency point according to the frequency point of the first network in the second message; optionally, the terminal may further be configured according to the second message.
  • the base station sends a broadcast message to the corresponding cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the processor 402 may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the processor 402 may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the second message, and obtain a target of the first network from the system information.
  • the global ID of the cell of the cell is the global ID of the cell of the cell.
  • the processor 402 determines, according to the cell ID of the target cell of the first network, whether the preset condition is met, and if yes, searches for the frequency of the second network that can be accessed, according to the available The frequency of the incoming second network sends a connection request to the second network to establish a call on the second network.
  • the preset condition may include:
  • the cell ID of the target cell belongs to a cell ID list saved in the terminal, and the cell ID list is used to save the first when the terminal changes from the first network to the second network.
  • the cell ID of the network the transformation including reselection, redirection or handover.
  • the signal of the first network of the current network environment is better than the signal of the second network.
  • the signal of the first network is better than the signal of the second network, that is, the signal quality of the signal of the first network is higher than the signal quality of the signal of the second network, and the stability of the signal of the first network may be higher. Or signal strength is stronger.
  • the signal of the first network of the current network environment that is better than the signal of the second network may be the measured signal strength of the first network corresponding to the cell ID obtained according to the information of the first network in the second message.
  • the signal strength of the second network is greater than the threshold N, and N is greater than or equal to M.
  • Pre-configured to preferentially select the second network refers to considering the second network first, and when the second network cannot meet the requirement, selecting another network.
  • the requirement that the requirement cannot be met may not meet the requirements for establishing a connection of the network or some requirements of the terminal setting, and the present invention is not limited to the requirements.
  • the preset condition may be at least one of the above conditions A, B, and C.
  • the preset condition is two or more than two, the preset condition satisfies the meaning that all the preset conditions are satisfied, or at least one of the preset conditions is satisfied.
  • the determination of the preset condition is added, and when the preset condition is met, the second network is selected to be accessed, and the efficiency of the terminal to be redirected is further ensured, and the terminal is directly redirected according to the second message. After the first network, the probability of switching to the second network again due to factors such as the first network signal difference.
  • the thresholds M and N may be a certain value between -90 dBm and -60 dBm, and the thresholds M and N may be two identical values, or may be two different values.
  • the processor 402 further updates the cell list, and deletes the target cell ID that exceeds the validity period in the cell list. If the validity period is 8 hours, the cell ID record stored in the cell list for more than 8 hours is automatically deleted. The cell list is updated in real time to ensure the effectiveness of the cell list, which can further improve the efficiency of terminal redirection.
  • the processor 402 is determined according to the cell ID of the target cell.
  • the breaking of the preset condition A is satisfied by: confirming that the cell ID is recorded in the cell list. Specifically, after the processor 402 acquires the cell ID of the target cell according to the information of the first network in the second message, the cell ID is searched in the cell list, and if the cell ID exists in the cell list, the preset condition A is Satisfy.
  • the second message may include multiple frequency points, and when at least one cell ID of the cell ID corresponding to the multiple frequency points belongs to the cell list, the preset condition A is satisfied.
  • the redirection record redirected from the first network to the second network may further include a frequency point of the redirected second network corresponding to the target cell ID, and the processor 402 is configured according to the access
  • the point sends a connection request to the second network.
  • the processor 402 determines, according to the cell ID of the target cell, that the preset condition B is satisfied, that: the signal strength of the first network that confirms the cell ID is less than a threshold M, and the second The signal strength of the network is greater than the threshold N, and N is greater than or equal to M. If the signal strengths of the first network and the second network of the cell ID are not measured before the second message is received, the correlation signal strengths of the first network and the second network are measured first.
  • the M and N ranges from -90 dBm to -60 dBm.
  • M is -90 dBm and N is -60 dBm, that is, if the signal strength of the first network is less than -90 dBm and the signal strength of the second network is greater than -60 dBm
  • the preset condition B is satisfied. If both M and N are -60 dBm, that is, if the signal strength of the first network is less than -60 dBm and the signal strength of the second network is greater than -60 dBm, the preset condition B is satisfied.
  • the second message may include multiple frequency points, and firstly, according to the need, the signal strength of the first network of the cell ID corresponding to each frequency point is less than a threshold value M, if the multiple network ID corresponds to the first network If the signal strength is less than the threshold M, the signal strength of the second network is measured; if the signal strength of the first network corresponding to at least one of the plurality of cells is greater than the threshold M, the preset condition B is not satisfied.
  • determining, by the processor 402, that the preset condition C is satisfied according to the cell ID of the target cell includes: confirming that the cell ID of the target cell belongs to the terminal pre-configured with priority When the target cell category of the second network is selected, the preset condition C is satisfied.
  • the terminal pre-configured to preferentially select the second network may include the cell ID voice service request pre-configured by all or part of the target cell to preferentially select the second network.
  • determining whether the preset condition is met according to the cell ID, and if the processor 402 determines that the preset condition is not satisfied according to the cell ID redirecting the frequency of the first network according to the second message.
  • the point sends a connection request to the first network of the target cell to establish a call on the first network.
  • the received second message may include a frequency point of a first network that is redirected, and the processor 402 acquires a cell ID according to the first network frequency point, and if the preset condition is not satisfied according to the cell ID, Determining whether the signal strength of the frequency of the first network meets the minimum requirement for the voice service to fall back, and if yes, sending a connection request to the first network according to the frequency of the first network; If it does not reach, it searches for other network signals of the cell or access network signals of nearby cells.
  • the method for sending a connection request to the first network of the target cell according to the frequency of the first network in the second message, and the method for establishing a call in the first network the present invention is only illustrated by way of example and not limitation.
  • the second message may include multiple first network frequency points, such as three or five first network frequency points.
  • first network frequency points such as three or five first network frequency points.
  • terminal 400 may implement the corresponding processes of the methods in FIG. 1 to FIG. 2 .
  • the description in the foregoing method embodiments is also applicable to the embodiment. .
  • the terminal provided by the terminal After receiving the second message, the terminal provided by the terminal obtains the cell ID of the target cell according to the second message, and when the cell ID determines that the preset condition is satisfied, sends a connection request to the second network, where When the terminal is redirected, the second network is selected according to the preset condition, which enhances the ability of the terminal to process the call.
  • the processor 402 may be a central processing unit ("CPU"), and the processor 402 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or may be any conventional processor or the like.
  • the processor 402 can be the MSM8974, or the MSM8974Pro, or the MSM8926.
  • the bus 408 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus 408 in the figure.
  • transceiver 406 will also remain connected to one or more antennas.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 402 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the processor 402, or may be performed by a combination of hardware and software modules in the processor 402.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium may be located inside the processor 402 or external to the processor 402, and the steps of the above method may be completed in combination with hardware. To avoid repetition, it will not be described in detail here.
  • terminal 400 shown in FIG. 5 only shows the processor 402, the memory 404, the transceiver 406, and the bus 408, in a specific implementation process, those skilled in the art should understand that the terminal 400 also includes a normal implementation. Other devices necessary for operation. At the same time, those skilled in the art will appreciate that the terminal 400 may also include hardware devices that implement other additional functions, depending on the particular needs. Moreover, those skilled in the art will appreciate that the terminal 400 may also only include the components necessary to implement the embodiments of the present invention, and does not necessarily include all of the devices shown in FIG.
  • the hardware structure shown in FIG. 5 and the above description are applicable to various terminals provided by the embodiments of the present invention. It will be apparent to those skilled in the art that all or part of the above steps may be passed through a program.
  • the instruction-related hardware is completed, and the program can be stored in a computer readable storage medium such as a ROM, a RAM, an optical disk, or the like.
  • the embodiment of the present invention further provides a processor 402.
  • the processor 402 may be a central processing unit (“CPU"), and the processor 402 may also be Other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the general purpose processor may be a microprocessor or may be any conventional processor or the like.
  • the processor 402 can be the MSM8974, or the MSM8974Pro, or the MSM8926.
  • processor 402 can be configured to perform the following operations:
  • the second message includes information of a first network, where the information is used by the terminal to redirect from a current network to the first network supporting CS voice service, the current network and the first a different network;
  • the present embodiment is described from the perspective of the processor 402, which may be transmitted by means of the transceiver 406, the bus 408, and the necessary auxiliary circuits (e.g., antennas) during processing of the processor 402.
  • the second message received by the processor 402 can be forwarded after the transceiver 406 receives it; the processor 402 sends a connection request that can be sent by the transceiver 406 to a base station of the second network, and the like.
  • the current network and the first network respectively represent different networks, such as the current network represents a 4G network, and the first network represents a 3G network or a 2G network.
  • the current network and The first network may be different in that the current network is different from the radio access technology (RAT) of the first network.
  • the first network and the second network respectively represent different networks, and the first network and the second network may respectively represent a 2G network and a 3G network, such as the first network represents a 2G network, the second network represents a 3G network; or the first network representation A 3G network, and a second network represents a 2G network.
  • the first network may be different from the second network in that the first network is different from the radio access technology (RAT) of the second network.
  • the terminal initiates a call or a called party. If the current network attached to the terminal does not have a CS domain, such as 4G, the terminal sends a first message to the current network, where the first message is used to request CSFB voice. After the current network receives the first message, the access network base station of the current network, such as the eNodeB, sends a second message to the terminal, where the second message indicates that the terminal is redirected from the current network to the first network. The current network is different from the first network.
  • a CS domain such as 4G
  • the second message received by the terminal such as an RRC Connection Release message or a Cell Change Order (CCO) message
  • the second message includes information of the first network, where the information Used for the terminal to redirect from the current network to the first network.
  • the information includes a frequency point of the target cell of the first network, and indicates that the terminal can be redirected from the current network to the first network by using the frequency point.
  • the frequency point refers to a specific frequency value.
  • the information may further include system information of the target cell, where the system information may include a cell global ID of the target cell, where the global ID of the cell is a global unique identifier of the target cell, and the device may be uniquely identified.
  • the cell ID of the target cell, the access network and the core network of the first network can identify the target cell by using the cell global ID (cellGlobalId).
  • the information may further include a cell physical ID (PCI) of the target cell, where the cell physical ID is a cell ID of the physical layer, and is a cell identifier that interacts with the physical layer channel signal when the terminal connects with the base station of the first network, and the inter-cell
  • PCI cell physical ID
  • the scrambling form is also related to the physical ID of the cell to avoid cell interference.
  • the cell physical ID is different from the cell global ID (cellGlobalId), and cannot uniquely identify the cell ID of the target cell.
  • the core network of the first network cannot pass the cell.
  • the physical ID uniquely identifies the target cell.
  • the cell ID of the target cell may be a cell global ID or Cell physical ID.
  • the obtaining, by the processor 402, the cell ID of the target cell of the first network according to the information includes:
  • the terminal may acquire system information corresponding to the frequency point according to the frequency point of the first network in the second message; optionally, the terminal may further be configured according to the second message.
  • the base station sends a broadcast message to the corresponding cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the processor 402 may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the processor 402 may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the information, and obtain a target cell of the first network from the system information.
  • Community Global ID the system information of the target cell at the frequency of each cell, and the broadcast message of the different frequency points carries the system information of the target cell corresponding to the frequency point, such as the global ID of the cell. (cellGlobalId) and so on.
  • the processor 402 may obtain the cell ID of the corresponding target cell from the broadcast message. Therefore, the processor 402 may acquire system information corresponding to the frequency point according to a frequency point of the target cell of the first network in the information
  • the processor 402 determines, according to the cell ID of the target cell of the first network, that the preset frequency is satisfied, and searches for the frequency of the second network that can be accessed, according to the accessible The frequency of the two networks sends a connection request to the second network to establish a call on the second network.
  • the preset condition may include:
  • the cell ID of the target cell belongs to a saved cell ID list, and the cell ID column
  • the table is configured to save a cell ID of the first network when the first network is transformed to the second network, and the transform includes reselection, redirection, or handover.
  • the signal of the first network of the current network environment is better than the signal of the second network.
  • the signal of the first network is better than the signal of the second network, that is, the signal quality of the signal of the first network is higher than the signal quality of the signal of the second network, and the stability of the signal of the first network may be higher. Or signal strength is stronger.
  • the signal of the first network of the current network environment that is better than the signal of the second network may be the measured first network corresponding to the cell ID acquired according to the information of the first network in the second message.
  • the signal strength is less than the threshold M, and the signal strength of the second network is greater than the threshold N, and N is greater than or equal to M.
  • Pre-configured to preferentially select the second network refers to considering the second network first, and when the second network cannot meet the requirement, selecting another network.
  • the requirement that the requirement cannot be met may not meet the requirements for establishing a connection of the network or some requirements of the terminal setting, and the present invention is not limited to the requirements.
  • the preset condition may be at least one of the above conditions A, B, and C.
  • the preset condition is two or more than two, the preset condition satisfies the meaning that all the preset conditions are satisfied, or at least one of the preset conditions is satisfied.
  • the determination of the preset condition is added, and when the preset condition is met, the second network is selected to be accessed, and the efficiency of the terminal to be redirected is further ensured, and the terminal is directly redirected according to the second message. After the first network, the probability of switching to the second network again due to factors such as the first network signal difference.
  • the thresholds M and N may be a certain value between -90 dBm and -60 dBm, and the thresholds M and N may be two identical values, or may be two different values.
  • the processor 402 further updates the cell list, and deletes the target cell ID that exceeds the validity period in the cell list. If the validity period is 8 hours, the cell ID record stored in the cell list for more than 8 hours is automatically deleted. The cell list is updated in real time to ensure the effectiveness of the cell list, which can further improve the efficiency of terminal redirection.
  • processor 402 may correspond to the terminal in the foregoing communication method, and the processor 402 implements the corresponding processes of the respective methods in FIG. 1 to FIG. 2, and details are not described herein for brevity.
  • FIG. 6 is an example of a processor according to an embodiment of the present invention.
  • the module is a module/program having a corresponding function, and mainly includes: an access layer, a non-access stratum, a multi-mode, a module interface, and the like.
  • the access layer is a module/program that connects and interacts with the base station of the network, such as receiving the second message; acquiring the cell ID of the target cell of the first network indicating the redirection in the second message; and the base station of the second network Send a connection request, etc.
  • the non-access stratum can implement processing and interaction functions above the access layer function, such as judging the preset conditions; processing flow between the processor and the core network.
  • modules of the processor can support the service after the processor accesses the network or the processor accesses the network.
  • multi-mode is the management of communication in multiple working modes, including multi-mode management, connection management and system decision-making.
  • the module interface provides information interface for the processor to handle various services, including: service quality, data management, Wireless message management, packet data services, address book services, etc.
  • the processor provided in this embodiment acquires the cell ID of the target cell according to the second message after receiving the second message, and sends a connection request to the second network when determining that the preset condition is satisfied according to the cell ID.
  • the terminal can be redirected according to a preset condition to access the second network, which enhances the ability of the processor to process the call.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de traitement d'un service vocal comprenant les étapes au cours desquelles : un terminal envoie un premier message, le premier message étant utilisé pour demander un service vocal CSFB (102) ; le terminal reçoit un second message, le second message contenant des informations relatives à un premier réseau, les informations étant utilisées pour réorienter le terminal depuis un réseau actuel vers le premier réseau prenant en charge un service vocal CS et le réseau actuel étant différent du premier réseau (104) ; le terminal obtient un identifiant d'une cellule cible du premier réseau en fonction des informations (106) ; le terminal évalue si des conditions prédéfinies sont satisfaites en fonction de l'ID de cellule et, si tel est le cas, il envoie une demande de connexion à une station de base d'un second réseau prenant en charge le service vocal CS de manière à établir une connexion CS, le premier réseau étant différent du second (108). Le procédé permet un accès facultatif au second réseau en fonction des conditions prédéfinies au cours d'un processus de réorientation du terminal. De plus, le procédé améliore la capacité de traitement d'un appel par l'intermédiaire du terminal.
PCT/CN2014/088748 2014-10-16 2014-10-16 Procédé de traitement d'un service vocal et terminal WO2016058164A1 (fr)

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WO2020093213A1 (fr) * 2018-11-05 2020-05-14 深圳市欢太科技有限公司 Procédé et appareil d'amélioration de la qualité d'appel, et dispositif terminal

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CN114501559A (zh) * 2020-11-13 2022-05-13 北京小米移动软件有限公司 一种呼叫方法和装置
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