WO2022241606A1 - Procédé de commutation de réseau et appareil associé - Google Patents

Procédé de commutation de réseau et appareil associé Download PDF

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Publication number
WO2022241606A1
WO2022241606A1 PCT/CN2021/094083 CN2021094083W WO2022241606A1 WO 2022241606 A1 WO2022241606 A1 WO 2022241606A1 CN 2021094083 W CN2021094083 W CN 2021094083W WO 2022241606 A1 WO2022241606 A1 WO 2022241606A1
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Prior art keywords
network
voice
processed
module
frame
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PCT/CN2021/094083
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English (en)
Chinese (zh)
Inventor
张颖哲
班先亮
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海能达通信股份有限公司
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Priority to PCT/CN2021/094083 priority Critical patent/WO2022241606A1/fr
Publication of WO2022241606A1 publication Critical patent/WO2022241606A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present invention relates to the communication field, and more specifically, relates to a network switching method and a related device.
  • broadband clusters private networks have also entered the stage of broadband and narrowband integration.
  • More and more dual-mode terminals (supporting both broadband communication and narrowband communication) choose the networking mode of broadband + narrowband.
  • the broadband network generally adopts the small-area system mode
  • the narrowband network generally adopts the large-area system mode.
  • the dual-mode terminal will automatically switch to the broadband network and the broadband network during the movement process.
  • the network with better network quality makes the dual-mode terminal frequently switch between broadband and narrowband networks.
  • the current voice service needs to be terminated at this time, and then the network switch is performed.
  • the voice output by the voice sender among the communication parties is not successfully received by the voice receiver, the integrity of the voice call is poor, and the user experience is poor.
  • the present invention provides a network switching method and related devices to solve the problem that the voice output by the voice sender among the two communication parties is not successfully received by the voice receiver when the network is switched in the process of performing voice services on a dual-mode terminal , the integrity of the voice call is poor, and the user experience is poor.
  • a network switching method applied to a second network module in a terminal, where the first network module and the second network module in the terminal are respectively modules for performing network switching when the terminal is performing a voice service; the The first network module is connected to the first network system and communicates with the communication target through the first network system; the second network module is connected to the second network system;
  • the network switching method includes:
  • the call data is the Service data and voice data of the current voice service performed by the terminal through the first network module;
  • the network switching the instruction includes said call data
  • the second network system After the second network system successfully establishes a communication connection with the communication target, acquire the speech frame to be processed, and perform a synchronous comparison operation of the speech frame to be processed with the first network module;
  • acquiring the speech frame to be processed, and performing a synchronous comparison operation of the speech frame to be processed with the first network module including:
  • the voice call state is a voice receiving state
  • acquire the first pending voice frame sent by the communication target received by the first network module and receive the message sent by the communication target through the second network system
  • the second speech frame to be processed
  • the first network module Synchronously comparing the first speech frame to be processed and the second speech frame to be processed, wherein, during the synchronous comparison, the first network module outputs the first speech frame to be processed to The voice output module in the terminal, so that the voice output module outputs the first voice frame to be processed, and the second network module prohibits outputting the second voice frame to be processed to the voice frame in the terminal Voice output module.
  • processing other speech frames after the speech frame to be processed includes :
  • the voice frame sent by the communication target and located after the second voice frame to be processed is received through the second network system;
  • acquiring the speech frame to be processed, and performing a synchronous comparison operation of the speech frame to be processed with the first network module including:
  • the voice call state is a voice transmission state
  • processing other speech frames after the speech frame to be processed includes :
  • a network switching device applied to a second network module in a terminal, where the first network module and the second network module in the terminal are respectively modules for performing network switching when the terminal is performing a voice service; the The first network module is connected to the first network system and communicates with the communication target through the first network system; the second network module is connected to the second network system;
  • the network switching device includes:
  • a data synchronization module configured to perform a call data synchronization operation with the first network module when it is determined that the network quality of the first network module and the second network module meet preset network switching conditions,
  • the call data is the service data and voice data of the current voice service performed by the terminal through the first network module;
  • An instruction sending module configured to send a network switching instruction to the second network system, so that the second network system and the first network system perform the synchronous operation of the call data and establish communication with the communication target connection;
  • the network switching instruction includes the call data;
  • a synchronous comparison module configured to obtain a voice frame to be processed after the second network system successfully establishes a communication connection with the communication target, and perform a synchronous comparison of the voice frame to be processed with the first network module operate;
  • a network switching module configured to process other voice frames after the voice frame to be processed after the synchronization comparison operation is completed and it is determined that the first network module successfully performs the processing operation corresponding to the voice frame to be processed .
  • the synchronous comparison module includes:
  • the voice frame acquisition submodule is used to acquire the first pending voice frame sent by the communication target received by the first network module when the voice call state is the voice receiving state, and pass the second
  • the network system receives the second voice frame to be processed sent by the communication target;
  • a synchronous comparison submodule configured to perform synchronous comparison of the first speech frame to be processed and the second speech frame to be processed, wherein, during the synchronous comparison, the first network module compares the The first voice frame to be processed is output to the voice output module in the terminal, so that the voice output module outputs the first voice frame to be processed, and the second network module prohibits the second voice frame to be processed The frames are output to the voice output module in the terminal.
  • the network switching module includes:
  • the voice frame receiving submodule is configured to complete the synchronous comparison between the first voice frame to be processed and the second voice frame to be processed, and determine that the first network module has successfully output the first voice frame to be processed After the voice output module in the terminal, receive the voice frame sent by the communication target and located after the second voice frame to be processed through the second network system;
  • the voice frame output submodule is configured to output the voice frame after the second voice frame to be processed to the voice output module in the terminal.
  • An electronic device comprising: a first network module and a second network module, the first network module and the second network module are respectively modules for performing network switching of the terminal during voice service; the The first network module is connected to the first network system and communicates with the communication target through the first network system; the second network module is connected to the second network system;
  • the second network module is configured to execute the above-mentioned network switching method.
  • the second network module includes: a memory and a processor
  • the memory is used to store programs
  • the processor invokes the program and is used to execute the above-mentioned network switching method.
  • a storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above network switching method.
  • the present invention has the following beneficial effects:
  • the present invention provides a network switching method and related devices.
  • the second network module and the second network module are switched.
  • the synchronous operation of the call data of a network module and the synchronous operation of the call data between the second network system and the first network system enable the second network module to know the call data between the first network module and the communication target in time.
  • the second network system establishes a communication connection with the communication target, which ensures that both network modules are connected to the communication target during network switching, and during the connection process, the voice frames to be processed are obtained and communicated with the first network
  • the module performs a synchronous comparison operation on the speech frame to be processed.
  • the processing is located in the speech frame to be processed. Processing other voice frames after the voice frame ensures continuous processing of the voice frames of both communication parties, thereby ensuring the integrity of data communication and improving user experience.
  • Fig. 1 is a kind of DMR/PDT uplink TDMA frame structural diagram that the embodiment of the present invention provides;
  • Fig. 2 is a kind of DMR/PDT downlink TDMA frame structure provided by the embodiment of the present invention
  • FIG. 3 is a schematic diagram of a DMR random access CSBK signaling provided by an embodiment of the present invention
  • FIG. 4 is a schematic diagram of the definition of a DMR registration signaling Service_Options field provided by an embodiment of the present invention
  • Fig. 5 is the schematic diagram of a kind of DMR MBC header signaling that the embodiment of the present invention provides;
  • Fig. 6 is a schematic diagram of a DMR MBC middle block signaling provided by an embodiment of the present invention.
  • Fig. 7 is a schematic diagram of a DMR MBC last block signaling provided by an embodiment of the present invention.
  • FIG. 8 is a method flowchart of a network switching method provided by an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a network switching method provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another network switching method provided by an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of another network switching method provided by an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of another network switching method provided by an embodiment of the present invention.
  • Fig. 13 is a schematic structural diagram of a network switching device provided by an embodiment of the present invention.
  • broadband clusters private networks have also entered the stage of broadband and narrowband integration.
  • the dual-mode terminals of many companies can support these two network standards at the same time. More and more customers choose the network mode of broadband + narrowband.
  • the narrowband network in this embodiment mainly refers to the network system conforming to the narrowband standard such as DMR/PDT, and it mainly adopts the TDMA frame structure of two time slots, is divided into uplink and downlink two directions, each time slot 30ms, in A TDMA frame contains 2 time slots, 60 ms in total, and the uplink and downlink frame structures of the DMR/PDT standard are shown in Figure 1 and Figure 2 respectively.
  • the broadband network mainly refers to the PoC system based on the broadband mobile network (LTE).
  • the PoC system is a Push to talk service based on the mobile network and using VoIP technology. It borrows the PTT feature in the narrowband trunking system and is generally implemented through the SIP protocol.
  • narrowband networks are generally large-area systems, so the user terminal will have frequent network switching during the mobile process.
  • Different network standards when the dual-mode terminal crosses the overlapping coverage area, it will first end the current service, exit the current registration network, and register to the new network, then re-establish the service to complete the handover process and continue voice and other services.
  • the voice output by the voice sender among the two communication parties is not successfully received by the voice receiver, and problems such as call interruption and obvious word drop will occur.
  • the integrity of the voice call is poor, and the user experience is poor.
  • the inventor found through research that it is possible to adopt a scheme of always registering on two networks and switching at any time, but this scheme consumes more power and wastes resources greatly.
  • the inventor made further research and improvements.
  • two networks are used to connect at the same time and can process services at the same time.
  • the network after switching does not output voice temporarily, but in After a smooth switchover, the network after the switchover only outputs voice.
  • the network before the switchover is disconnected, realizing the smooth switchover of the two networks, ensuring that the voice service is not interrupted, and there will be no problem of word drop. The integrity of the call is better, and the user experience is better.
  • the present invention can support cross-network smooth handover instructions through extended protocols.
  • This instruction is different from ordinary handover and registration procedures.
  • the handover process it supports temporary dual-network registration, and can temporarily maintain two call links.
  • the handover process The original network is still used in the middle, and the new network will be used only after the switch is successful, so that one of the networks can only be exited after the business is synchronized, which can ensure the continuity of the business during the switch process, without losing words, and does not need to maintain the two networks for a long time Online at the same time, the user experience is greatly improved, and resources will not be wasted for a long time, which saves more power.
  • DMR can also be supported by means of carrying uplink extended MBC multi-frame signaling or subsequent pull-up of control information by the system.
  • the normal registration signaling of the DMR standard is a single-frame CSBK (Control Signaling Block, Control Signaling Block) signaling.
  • the registration CSBK signaling and the Service Options field therein are shown in Figure 3 and Figure 4 respectively, and the signaling needs to be extended To support smooth handover instructions, there are two optional solutions.
  • the first method First, by extending the Reserved bit in the Service Options field, it is used to distinguish whether the CSBK signaling is a normal registration signaling or a smooth handover request, and then carry additional information through the multi-frame signaling (MBC) extension of the DMR standard
  • MBC multi-frame signaling
  • the format of MBC is shown in Figure 5, Figure 6 and Figure 7.
  • the LB field of the first frame can be filled with 0, which means that there will be MBC Data Block in the future, and other information in the MBC header is consistent with the standard registration CSBK signaling , the terminal can carry the relevant handover information in the subsequent MBC Data Block.
  • the second method It is also possible to send only a single frame of CSBK signaling without extending the MBC signaling. After the system judges that it is a smooth handover request by identifying the extended Service_Options field, it continues to obtain the relevant crossover request of the terminal through data pull-up (Polling) and other methods. district information. This method will be less efficient than the first method, because there is an additional pull-up process, which will be about 60ms slower.
  • the embodiment of the present invention provides a network switching method, which is applied to the second network module in the terminal.
  • the terminal (such as a walkie-talkie) is provided with two network modules, namely a broadband module and a narrowband module.
  • a broadband module and a narrowband module.
  • the second network module is set to be the module after the network switching of the terminal during the voice service
  • the first network module is the module before the network switching of the terminal during the voice service
  • the second network module may be a broadband module or a narrowband module
  • the first network module may be a broadband module or a narrowband module.
  • the second network module is a narrowband module
  • the first network module and the second network module are two independent chips.
  • the first network module and the second network module can also be two different software modules on the same chip. At this time, The chip is used to implement network switching control.
  • the first network module is connected to a first network system and communicates with a communication target through the first network system.
  • the communication target in this embodiment may also be a terminal. Such as walkie-talkies.
  • the second network module is connected to the second network system.
  • the first network system is a narrowband system
  • the second network module is a broadband module
  • the second network system is a broadband system, which is also called a public network intercom system.
  • the first network module and the second network module can enable the smooth handover function described above.
  • the first network module and the second network module can simultaneously They are all communicatively connected with the same communication target (such as a walkie-talkie), and realize smooth service switching from the first network module to the second network module.
  • the network switching method may include:
  • the call data is the service data and voice data of the current voice service performed by the terminal through the first network module.
  • the first network module detects the network quality value of the first network module, and when the network quality value is smaller than the preset network quality value corresponding to the first network module in the preset network switching condition, sends a The detection command is sent to the second network module.
  • the second network module detects the network quality value of the second network module, and determines whether the network quality value of the second network module is greater than the preset communication quality value corresponding to the second network module in the preset network switching condition, if greater than , it is determined that the network quality value of the second network module satisfies the network switching condition, and feeds back the information that the network quality of the second network module meets the preset network switching condition to the first network module, so that the first network module can know in time Network switching and call data synchronization are required.
  • the first network module needs to send the call data to the second network module, wherein the call data is the service data and voice data of the current voice service performed by the terminal through the first network module , the business data may be the call type (outgoing or incoming), the address of the calling party and the called party, etc., and the voice data includes the serial number of the current voice or data, etc.
  • the first network module as a narrowband module and the second network module as a broadband module as an example.
  • the signal quality of the narrowband side is poor, which triggers the network scan of the broadband side.
  • the network quality of the broadband side is better.
  • the broadband side and the narrowband Synchronize call data on the other side.
  • the network switching instruction includes the call data.
  • the second network module sends a network switching instruction to the second network system corresponding to the second network module.
  • the network switching command carries the above-mentioned smooth handoff identifier and the above-mentioned call data, so that the second network system and the first network system perform call data synchronization and establish a communication connection with the communication target.
  • the second network system After the second network system receives the network switching instruction, it performs smooth handover registration, and after the registration is completed, it notifies the first network system to perform the above-mentioned call data synchronization with the first network system.
  • the second network module establishes a communication connection with the communication target through the second network system after the second network system and the first network system perform call data synchronization, so as to establish a communication connection including the second network module-the first Two network systems - communication links for communication targets.
  • the broadband side initiates a smooth handover registration, which is different from the general registration.
  • Incoming call-related information call type, calling and called address, current voice or data serial number, etc.
  • the broadband system After successful registration on the broadband side, the broadband system will notify the narrowband system that both systems need to synchronize relevant call data, and the broadband side will establish a corresponding call and notify the dual-mode terminal.
  • the voice frames to be processed are also different.
  • the voice frame to be processed is the voice frame output by the communication target.
  • the voice frame to be processed is the voice frame output by the user.
  • the processing is performed according to speech frames. Furthermore, after the second network system successfully establishes a communication connection with the communication target, it acquires the speech frame to be processed, and performs a synchronous comparison operation of the speech frame to be processed with the first network module.
  • Synchronous comparison in this embodiment refers to comparing whether the speech frames processed by the first network module and the second network module are synchronized, that is, judging whether the processing is the same speech frame, if not the same speech frame, then controlling the second network
  • the module processes the same voice frame being processed by the first network module, ensuring that the first network module and the second network module process synchronously.
  • the first network module processes the speech frames to be processed, and the second network module processes other speech frames after the speech frames to be processed, so as to realize smooth switching of the network.
  • step S14 also include:
  • the second network module sends a network switching success message to For the first network module, the first network module disconnects the communication connection with the communication target to ensure that only the second network module is connected to the communication target after network switching.
  • the second network system synchronizes the call data with the first network system, so that the second network module can know the call data between the first network module and the communication target in time.
  • the second network system establishes a communication connection with the communication target, which ensures that both network modules are connected to the communication target during network switching, and during the connection process, the voice frames to be processed are obtained and communicated with the first network
  • the module performs a synchronous comparison operation on the speech frame to be processed.
  • the processing is located in the speech frame to be processed. Processing other voice frames after the voice frame ensures the continuous processing of the voice frames of both sides of the communication without word drop at all, thereby ensuring the integrity of data communication, improving device performance, and improving user experience.
  • the present invention only needs to keep two links online at the same time for a short time, the waste of channel resources is small, and the power is saved.
  • the voice call state is divided into a voice receiving state and a voice sending state.
  • the smooth switching operations performed by the network module are different, which are introduced separately.
  • the voice call state can be judged according to whether the current terminal is outputting or receiving voice.
  • the voice call state is the voice receiving state
  • the voice call state is the voice sending state.
  • the voice call state is a voice receiving state.
  • step S13 may include:
  • the second network module can also normally receive the voice frame sent by the communication target. That is to say, at the same time, both the first network module and the second network module can receive the voice frame sent by the communication target.
  • the voice frame received by the first network module is called the first
  • the speech frame received by the second network module is referred to as the second speech frame to be processed.
  • the two network modules will process the voice frame. Specifically, the first network module processes the first voice frame to be processed, and the second network module processes the second voice frame to be processed. frames are processed.
  • the process of processing the first speech frame to be processed may be:
  • the voice call state is a voice receiving state
  • the voice sent by the communication target needs to be received at this time, so the first network module outputs the first voice frame to be processed to the voice output module in the terminal, so that the The voice output module outputs the first voice frame to be processed, so that the user can hear the voice output by the communication target through the terminal.
  • Synchronous comparison is to compare whether the sequence numbers of the received first speech frame to be processed and the second speech frame to be processed are the same, that is, to determine whether the speech frames received by the two network modules are the same. If it is the same, then the first network module processes according to the above-mentioned processing method. Similarly, the second network module also receives the voice frame, but does not output the voice frame to the voice output module, that is, the call of the second network module comes after The terminal is maintained, and the call of the first network module is maintained at the front end.
  • the first network module outputs the first speech frame to be processed to the speech output module in the terminal, so that the speech output module outputs the first The voice frame to be processed, and the second network module prohibits the output of the second voice frame to be processed to the voice output module in the terminal, so that before the network switch, only the first network module outputs voice, and the second network module Network modules are maintained in the backend.
  • the first network module continues to process the received voice frame, if the voice received by the second network module is earlier than the voice received by the first network module, then the voice received by the second network module The voice needs to be buffered until it is fully synchronized with the voice received by the first network, and then switched. If the voice received by the second network is later than the voice received by the first network, then the voice received by the second network needs to be supplemented with comfort noise to fully synchronize with the voice received by the first network, and then switch.
  • step S14 may include:
  • the task of the first network module is completed.
  • the second network module needs to continue to perform subsequent operations to complete the smooth switching of the network. Thereafter, the second network module receives the voice frame sent by the communication target and located after the second voice frame to be processed through the second network system.
  • the process of processing the voice frame by the second network module is similar to the process of processing the voice frame by the first network module, please refer to the corresponding description in the above embodiment, and details will not be repeated here.
  • MS_NB The signal quality of the narrowband side
  • MS_BB the broadband side
  • the broadband side (MS_BB) initiates a smooth handoff registration to the broadband system (BB_system) (specifically, a smooth handover registration request). This registration is different from the general registration, and the flag indicates that it is a smooth handover registration and carries immediate expectations. Information related to the incoming call (call type, calling and called address, current voice or data serial number, etc.).
  • the broadband system (BB_system) performs smooth handoff registration, and returns a smooth handoff registration response to the broadband side (MS_BB).
  • the broadband side (MS_BB) After the broadband side (MS_BB) registers successfully, the broadband system (BB_system) will notify the narrowband system (NB_system) that both systems need to synchronize related business information (specifically, the information synchronization request and information synchronization response in Figure 9), and the broadband side ( MS_BB) establishes a corresponding call through the broadband system (BB_system) and notifies the dual-mode terminal.
  • the narrowband side (MS_NB) has been receiving voice data through the narrowband system (NB_system).
  • the dual-mode terminal establishes a desired call with the broadband system (BB_system) on the broadband side (MS_BB) and accesses the downlink voice frame.
  • BB_system broadband system
  • MS_BB broadband side
  • the dual-mode terminal internally compares the serial numbers of the voice frames received by broadband and narrowband. Before the comparison is successful, the voice played is still the voice received by the narrowband side (MS_NB). At the same time, the broadband The call on the side (MS_BB) is maintained in the background.
  • the dual-mode terminal After the comparison is successful, the dual-mode terminal internally switches the call master and slave, and switches all relevant resources to the broadband side (MS_BB), and the call on the broadband side (MS_BB) is transferred to the foreground for execution, and the call on the narrowband side (MS_NB) Go to background execution.
  • MS_BB broadband side
  • MS_BB broadband side
  • MS_NB narrowband side
  • the call on the narrowband side is processed in the background such as call exit, deregistration, etc., so that the narrowband side (MS_BB) withdraws from narrowband reception, and the voice data is received by the broadband side (MS_BB) thereafter.
  • MS_BB The signal quality of the broadband side
  • MS_NB The narrowband side
  • MS_NB finds a network with better quality.
  • the narrowband side (MS_NB) initiates a smooth handover registration to the narrowband system (NB_system).
  • This registration is different from the general registration. It is indicated by the flag bit that it is a smooth handoff registration and carries the call-related information (call type, calling and called address, current voice or data serial number, etc.), can be directly carried through the uplink extended MBC multi-frame signaling or supported by the system’s subsequent pull-up call information.
  • the specific smooth handoff registration process is similar to the implementation process of the above smooth handoff registration.
  • the narrowband side (MS_NB) After the narrowband side (MS_NB) registers successfully, the narrowband system (NB_system) will notify the broadband system (BB_system) that both systems need to synchronize related business information (specifically, the information synchronization request and information synchronization response in Figure 10), and the narrowband side ( MS_NB) establishes a corresponding call through the narrowband system (NB_system) and notifies the dual-mode terminal.
  • the broadband side (MS_BB) has been receiving voice data through the broadband system (BB_system).
  • the dual-mode terminal establishes a desired call with the narrowband system (NB_system) on the narrowband side (MS_NB), and accesses the downlink voice frame.
  • NB_system narrowband system
  • MS_NB narrowband side
  • the dual-mode terminal internally compares the serial numbers of the voice frames received by broadband and narrowband. Before the comparison is successful, the voice played is still the voice received by the broadband side (MS_BB). The call on the side (MS_NB) is maintained in the background.
  • the dual-mode terminal will switch the master-slave call internally, and switch all relevant resources to the narrowband side (MS_NB), and the call on the narrowband side (MS_NB) will be transferred to the foreground for execution, and the call on the broadband side (MS_BB) Go to background execution.
  • MS_NB narrowband side
  • MS_BB broadband side
  • the call of the broadband side (MS_BB) is processed in the background such as call exit, deregistration, etc., so that the broadband side (MS_BB) withdraws from broadband reception, and the voice data is received by the narrowband side (MS_NB) thereafter.
  • the voice call state is a voice sending state.
  • step S13 may include:
  • both the first network module and the second network module receive the voice input by the user using the terminal, which are referred to as the third voice frame to be processed and the fourth voice frame to be processed respectively.
  • the first network module outputs the third speech frame to be processed to the communication target, and the second network module prohibits outputting the fourth speech frame to be processed to the communication target.
  • the process in which the first network module outputs the third speech frame to be processed to the communication target may include:
  • Encoding is performed on the third speech frame to be processed, and the encoded data is output to the communication target.
  • step S14 may include:
  • the processing procedure in this embodiment is similar to the above-mentioned processing procedure during voice reception, please refer to the corresponding description in the above-mentioned embodiment.
  • MS_NB The signal quality of the narrowband side
  • MS_BB the broadband side
  • the broadband side (MS_BB) initiates a smooth handoff registration to the broadband system (BB_system) (specifically, a smooth handover registration request). This registration is different from the general registration, and the flag indicates that it is a smooth handover registration and carries immediate expectations. Information related to the incoming call (call type, calling and called address, current voice or data serial number, etc.).
  • the broadband system (BB_system) performs smooth handoff registration, and returns a smooth handoff registration response to the broadband side (MS_BB).
  • the broadband side (MS_BB) After the broadband side (MS_BB) registers successfully, the broadband system (BB_system) will notify the narrowband system (NB_system) that both systems need to synchronize related business information (specifically, the information synchronization request and information synchronization response in Figure 11), and the broadband side ( MS_BB) establishes a corresponding call through the broadband system (BB_system) and notifies the dual-mode terminal.
  • the narrowband side (MS_NB) has been sending voice data through the narrowband system (NB_system).
  • the dual-mode terminal establishes a desired call with the broadband system (BB_system) on the broadband side (MS_BB), and maintains the right to speak within a certain period of time, even if there is no voice uplink.
  • BB_system broadband system
  • MS_BB broadband side
  • the dual-mode terminal performs voice data sharing internally.
  • the broadband and narrowband side performs voice coding on the same data at the same time.
  • the broadband side (MS_BB) immediately continues the voice transmission .
  • the master-slave switch is performed inside the dual-mode terminal, and all relevant resources are switched to the broadband side (MS_BB), the call on the broadband side (MS_BB) is transferred to the foreground for execution, and the call on the narrowband side (MS_NB) is transferred to the background for execution.
  • the call on the narrowband side (MS_NB) is processed in the background such as call exit, de-registration, etc., and exits the voice data transmission of the narrowband side (MS_NB).
  • MS_BB The signal quality of the broadband side
  • MS_NB The narrowband side
  • MS_NB finds a network with better quality.
  • the narrowband side (MS_NB) initiates a smooth handover registration to the narrowband system (NB_system).
  • This registration is different from the general registration. It is indicated by the flag bit that it is a smooth handoff registration and carries the call-related information (call type, calling and called address, current voice or data serial number, etc.), can be directly carried through the uplink extended MBC multi-frame signaling or supported by the system’s subsequent pull-up call information.
  • the specific smooth handoff registration process is similar to the implementation process of the above smooth handoff registration.
  • the narrowband side (MS_NB) After the narrowband side (MS_NB) registers successfully, the narrowband system (NB_system) will notify the broadband system (BB_system) that both systems need to synchronize related business information (specifically, the information synchronization request and information synchronization response in Figure 12), and the narrowband side ( MS_NB) establishes a corresponding call through the narrowband system (NB_system) and notifies the dual-mode terminal.
  • the broadband side (MS_BB) has been sending voice data through the broadband system (BB_system).
  • the dual-mode terminal establishes a desired call with the narrowband system (NB_system) on the narrowband side (MS_NB), and maintains the right to speak within a certain period of time, even if there is no voice uplink.
  • NB_system narrowband system
  • MS_NB narrowband side
  • the dual-mode terminal performs voice data sharing internally, and the narrowband side performs voice coding on the same data at the same time. After sending a complete voice superframe at the broadband side (MS_BB), the narrowband side (MS_NB) immediately continues voice transmission.
  • MS_BB broadband side
  • MS_NB narrowband side
  • the master-slave switch is performed inside the dual-mode terminal, and all relevant resources are switched to the narrowband side (MS_NB), the call on the narrowband side (MS_NB) is transferred to the foreground for execution, and the call on the broadband side (MS_BB) is transferred to the background for execution.
  • the call on the broadband side (MS_BB) is processed in the background such as call exit, de-registration, etc., and exits the voice data transmission of the broadband side (MS_BB).
  • the smooth handover process is started, and the handover process is performed.
  • the terminal needs to maintain the old network service while instructing the new network to perform smooth handover registration, and at the same time carry the information of the old network’s ongoing service (call type, calling and called address, current service serial number, etc.).
  • the present invention expands the protocol of the corresponding network, and can support new smooth handover registration indication signaling, which is distinguished from normal power-on and handover registration signaling, and at the same time carries current business key information, mainly including call type, calling and called addresses , the current business column number, etc.
  • the new network side After the new network side receives the smooth handoff registration instruction signaling, it identifies the current service information, and starts to synchronize and establish services with the old network. After the synchronization is completed, it sends a confirmation message to the terminal, and then establishes a call based on the relevant information and starts forwarding services.
  • the terminal synchronizes the service information received by the two networks, and tries to restore the service of the other network.
  • the terminal maintains the current service processing on the old network and also accesses services on the new network. If it is a voice receiving service, it only processes voice frames and does not play sound temporarily.
  • the terminal compares the voice frame numbers. When there is a time difference between the two network voice sequences, if the new network voice is earlier than the old network, then the new network voice needs to be buffered until it is completely synchronized with the old network voice, and then switched. If the new VoIP is later than the old network, the new VoIP needs to be supplemented with comfort noise to fully synchronize with the old VoIP, and then switch.
  • the service synchronization process After the service synchronization process is completed, if it is a voice receiving service, the voice of the new network can be played, and the voice of the old network can be stopped at the same time and the call can be exited. After successfully exiting the old network service, de-registration processing is performed to complete the entire smooth handover process. If it is a voice transmission service, the new network side transmits voice, and the network side performs deregistration processing, and stops transmitting voice.
  • another embodiment of the present invention provides a network switching device, which is applied to the second network module in the terminal, and the first network module in the terminal and the second network module are respectively the modules for the terminal to perform network switching during the voice service;
  • the first network module is connected to the first network system and communicates with the communication target through the first network system;
  • the second network module is connected to the second network system;
  • the network switching device includes:
  • a data synchronization module 11 configured to synchronize call data with the first network module when it is determined that the network quality of the first network module and the second network module meet preset network switching conditions , the call data is the service data and voice data of the current voice service performed by the terminal through the first network module;
  • An instruction sending module 12 configured to send a network switching instruction to the second network system, so that the second network system and the first network system perform the synchronous operation of the call data and establish a communication with the communication target. communication connection; the network switching instruction includes the call data;
  • a synchronous comparison module 13 configured to obtain a speech frame to be processed after the second network system successfully establishes a communication connection with the communication target, and perform a synchronous comparison of the speech frame to be processed with the first network module pair operation;
  • the network switching module 14 is configured to process other voices located after the voice frame to be processed after the synchronization comparison operation is completed and it is determined that the first network module successfully performs the processing operation corresponding to the voice frame to be processed frame.
  • the synchronous comparison module includes:
  • the first voice frame acquisition submodule is used to acquire the first pending voice frame sent by the communication target received by the first network module when the voice call state is the voice receiving state, and through the The second network system receives the second voice frame to be processed sent by the communication target;
  • the first synchronous comparison submodule is configured to perform synchronous comparison of the first speech frame to be processed and the second speech frame to be processed, wherein, during the synchronous comparison, the first network module will The first speech frame to be processed is output to the speech output module in the terminal, so that the speech output module outputs the first speech frame to be processed, and the second network module prohibits the second speech frame to be processed The processed voice frame is output to the voice output module in the terminal.
  • the network switching module includes:
  • the voice frame receiving submodule is configured to complete the synchronous comparison between the first voice frame to be processed and the second voice frame to be processed, and determine that the first network module has successfully output the first voice frame to be processed After the voice output module in the terminal, receive the voice frame sent by the communication target and located after the second voice frame to be processed through the second network system;
  • the first speech frame output submodule is configured to output the speech frame after the second speech frame to be processed to the speech output module in the terminal.
  • the synchronous comparison module includes:
  • the second voice frame acquisition submodule is used to acquire the third voice frame to be processed collected by the first network module and the fourth voice to be processed input by the user when the voice call state is the voice transmission state frame;
  • the second synchronous comparison sub-module is used to perform synchronous comparison on the third speech frame to be processed and the fourth speech frame to be processed; wherein, during the synchronous comparison process, the first network module will The third speech frame to be processed is output to the communication target, and the second network module is prohibited from outputting the fourth speech frame to be processed to the communication target.
  • the network switching module includes:
  • the second voice frame output submodule is configured to complete the synchronous comparison between the third voice frame to be processed and the fourth voice frame to be processed, and determine that the first network module has successfully output the third voice frame to be processed After the frames are output to the communication target, acquiring and sending the voice frames sequentially after the fourth voice frame to be processed to the communication target.
  • an information sending module is also included, which is used for the network switching module to process the speech frame to be processed after the synchronization comparison operation is completed and it is determined that the first network module successfully executes the processing operation corresponding to the speech frame to be processed. After other voice frames after the voice frame, send network switching success information to the first network module, so that the first network module disconnects the communication connection with the communication target.
  • the second network system synchronizes the call data with the first network system, so that the second network module can know the call data between the first network module and the communication target in time.
  • the second network system establishes a communication connection with the communication target, which ensures that both network modules are connected to the communication target during network switching, and during the connection process, the voice frames to be processed are obtained and communicated with the first network
  • the module performs a synchronous comparison operation on the speech frame to be processed.
  • the processing is located in the speech frame to be processed. Processing other voice frames after the voice frame ensures continuous processing of the voice frames of both communication parties, thereby ensuring the integrity of data communication and improving user experience.
  • another embodiment of the present invention provides an electronic device, including: a first network module and a second network module, the first network module and the second network module are respectively the modules for the terminal to perform network switching during the voice service; the first network module is connected to the first network system and communicates with the communication target through the first network system ; The second network module is connected to the second network system;
  • the second network module is configured to execute the above-mentioned network switching method.
  • the second network module includes: a memory and a processor
  • the memory is used to store programs
  • the processor invokes the program and is used to execute the above-mentioned network switching method.
  • another embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, wherein when the program is running, the control The device where the storage medium is located executes the above-mentioned network switching method.
  • the second network system synchronizes the call data with the first network system, so that the second network module can know the call data between the first network module and the communication target in time.
  • the second network system establishes a communication connection with the communication target, which ensures that both network modules are connected to the communication target during network switching, and during the connection process, the voice frames to be processed are obtained and communicated with the first network
  • the module performs a synchronous comparison operation on the speech frame to be processed.
  • the processing is located in the speech frame to be processed. Processing other voice frames after the voice frame ensures continuous processing of the voice frames of both communication parties, thereby ensuring the integrity of data communication and improving user experience.

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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 commutation de réseau et un appareil associé. Lorsqu'une condition de commutation de réseau prédéfinie est satisfaite, une opération de synchronisation de données d'appel d'un second module de réseau et d'un premier module de réseau est effectuée, et un second système de réseau et un premier système de réseau effectuent une opération de synchronisation sur les données d'appel, de telle sorte que le second module de réseau peut comprendre rapidement les données d'appel du premier module de réseau et d'une cible de communication. Le second système de réseau établit une connexion de communication avec la cible de communication, ce qui garantit que lorsqu'un réseau est commuté, les deux modules de réseau sont connectés à la cible de communication ; et pendant la connexion, une trame vocale à traiter est acquise, et une opération de comparaison de synchronisation de la trame vocale est effectuée avec le premier module de réseau. Une fois que l'opération de comparaison de synchronisation est achevée et qu'il est déterminé que le premier module de réseau a exécuté avec succès une opération de traitement correspondant à la trame vocale, d'autres trames vocales situées après ladite trame vocale sont traitées, assurant ainsi le traitement continu de trames vocales des deux parties de communication, ce qui garantit l'intégrité de la communication de données et améliore l'expérience utilisateur.
PCT/CN2021/094083 2021-05-17 2021-05-17 Procédé de commutation de réseau et appareil associé WO2022241606A1 (fr)

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US20090086674A1 (en) * 2007-10-01 2009-04-02 Lucent Technologies Inc. Method and system for providing voice call continuity
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CN111212452A (zh) * 2020-01-13 2020-05-29 海能达通信股份有限公司 语音通信的越区切换方法、通信系统、终端和存储装置
CN111629409A (zh) * 2020-05-27 2020-09-04 维沃移动通信有限公司 通话控制方法、装置及电子设备
CN112002333A (zh) * 2019-05-07 2020-11-27 海能达通信股份有限公司 一种语音同步方法、装置及通信终端

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Publication number Priority date Publication date Assignee Title
US20090086674A1 (en) * 2007-10-01 2009-04-02 Lucent Technologies Inc. Method and system for providing voice call continuity
CN104378819A (zh) * 2014-11-28 2015-02-25 东莞宇龙通信科技有限公司 网络切换过程中通话数据同步的方法及系统
CN110831090A (zh) * 2018-08-13 2020-02-21 海能达通信股份有限公司 一种越区切换方法、装置、多模终端及宽带基站
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