WO2017079942A1 - 对正在进行语音业务的终端进行处理的方法及装置、以及通信*** - Google Patents

对正在进行语音业务的终端进行处理的方法及装置、以及通信*** Download PDF

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Publication number
WO2017079942A1
WO2017079942A1 PCT/CN2015/094456 CN2015094456W WO2017079942A1 WO 2017079942 A1 WO2017079942 A1 WO 2017079942A1 CN 2015094456 W CN2015094456 W CN 2015094456W WO 2017079942 A1 WO2017079942 A1 WO 2017079942A1
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WO
WIPO (PCT)
Prior art keywords
terminal
voice service
release
gbr bearer
bearer
Prior art date
Application number
PCT/CN2015/094456
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English (en)
French (fr)
Inventor
王振东
杨勇
曾美艳
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201580084601.8A priority Critical patent/CN108353455B/zh
Priority to PCT/CN2015/094456 priority patent/WO2017079942A1/zh
Priority to EP15908072.0A priority patent/EP3364711A4/en
Priority to JP2018523398A priority patent/JP6699913B2/ja
Publication of WO2017079942A1 publication Critical patent/WO2017079942A1/zh
Priority to US15/977,259 priority patent/US10587757B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a method and apparatus for processing a terminal that is performing voice services, and a communication system.
  • IP Internet Protocol
  • PS Packet Switching
  • VOIP Voice over Internet Protocol
  • the VOIP service is also called VoLTE service in the LTE system.
  • the embodiments of the present application provide a method and apparatus for processing a terminal that is performing a voice service, and a communication system, to reduce a call drop rate in a voice communication process, and improve a user experience.
  • the present application provides a method of processing a terminal that is performing a voice service.
  • the RAN device determines to release a radio resource control (RRC) connection of a voice service terminal based on a guaranteed bit rate (GBR) bearer; and instructs the core network (CN) device to release the RRC connection of the terminal
  • RRC radio resource control
  • GBR guaranteed bit rate
  • the present application provides an apparatus for processing a terminal that is performing a voice service.
  • the device is located in the RAN device and includes a determining unit and an instruction sheet And a determining unit, configured to determine to release an RRC connection of the GBR bearer-based voice service terminal; the indication unit is configured to instruct the CN device to reserve the GBR bearer of the terminal in the release process of the RRC connection of the terminal.
  • the present application provides a RAN device, including a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to perform the method provided by the first aspect of the present application.
  • the RAN device actively redirects the voice service terminal, releases the RRC connection of the terminal, and instructs the CN device to reserve the GBR bearer of the voice service terminal during the release process. Since the bearer type of the VOIP service is a GBR bearer, the bearer of the VOIP service will not be released. When the terminal accesses again, the CN device can directly use the GBR bearer to recover the voice service, thereby avoiding the bearer of the VOIP service during the redirection process. Release voice service interruptions, reduce call drop rate, and improve user experience.
  • the reserved GBR bearer may be a GBR bearer (referred to as a voice GBR bearer) of the ongoing voice service of the terminal, or may be a GBR bearer of the terminal.
  • the reserved voice GBR bearer is more targeted than the reserved GBR bearer, and does not affect the release of other service GBR bearers.
  • the bearer is a voice GBR bearer.
  • the RRC connection of the release terminal is determined in any of the following cases:
  • the current serving cell of the terminal cannot meet the quality of service requirement of the ongoing voice service of the terminal; in this case, the RAN device can initiate the release of the RRC connection only when the current serving cell is insufficient to continue providing the voice service for the terminal, thereby making the voice
  • the service is redirected to a cell that is more suitable for providing voice services in a timely manner.
  • the terminal enters an overlapping area of frequency division duplex (FDD) and time division duplex (TDD), and the terminal does not support switching between FDD and TDD;
  • FDD frequency division duplex
  • TDD time division duplex
  • the terminal enters an overlapping area of the inter-frequency cell, and the terminal does not support the inter-frequency measurement.
  • the RAN device can be started in a scenario where a dropped call may occur.
  • the release of the RRC connection so that the voice service is redirected to the heterogeneous or inter-frequency cell in time to continue.
  • the RAN device may indicate that the CN device reserves the GBR bearer of the terminal by sending a release message to the CN device, where the release message carries a cell for instructing the CN device to reserve the GBR bearer of the terminal.
  • the release message may be an S1 User Equipment Context Release Request message.
  • the cell may be a reason value information carried in the release message.
  • the cause value information may be the added cause value information in the release message, and is used to indicate that the RRC connection release is performed for the terminal that is performing the GBR bearer-based voice service. It can also be the following cause value information: household inactivity or different radio access technology redirection.
  • the RAN device further sends an RRC connection release message to the terminal to release the air interface resource with the terminal.
  • the apparatus further includes an air interface release unit, configured to send an RRC connection release message to the terminal.
  • the present application further provides a method for processing a terminal that is performing a voice service, where the method is performed by a CN device, including:
  • the GBR bearer of the terminal is reserved.
  • the application further provides an apparatus for processing a terminal that is performing voice service, where the apparatus is located in a CN device, and includes a receiving unit and a retaining unit.
  • the receiving unit is configured to receive an indication that the RAN device sends to the CN device in the process of releasing the RRC connection of the terminal, where the indication is used to indicate that the CN device reserves the GBR bearer of the terminal, and the terminal is performing GBR bearer-based a voice service;
  • the reservation unit is configured to reserve the GBR bearer of the terminal according to the indication.
  • the application provides a CN device, including a processor and A memory for storing a program, the processor calling a program stored in the memory to perform the method provided by the fourth aspect of the present application.
  • the CN device can also perform the following operations:
  • the QoS information of the voice service of the terminal is sent to the RAN device.
  • the CN device may send the QoS information to the RAN device by using an initial user equipment context establishment request, and the QoS information is, for example, QCI1.
  • the CN device may further include a sending unit for performing the operation.
  • the reserved GBR bearer may be a GBR bearer (referred to as a voice GBR bearer) of the ongoing voice service of the terminal, or may be a GBR bearer of the terminal.
  • the CN device can perform the following operations:
  • the CN device may further include a determining unit for performing the operation.
  • the RAN device actively redirects the voice service terminal, releases the RRC connection of the terminal, and instructs the CN device to reserve the GBR bearer of the voice service terminal during the release process. Since the bearer type of the VOIP service is a GBR bearer, the bearer of the VOIP service will not be released. When the terminal accesses again, the CN device can directly use the GBR bearer to recover the voice service, thereby avoiding the bearer of the VOIP service during the redirection process. Release voice service interruptions, reduce call drop rate, and improve user experience.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a flowchart of a method for processing a terminal that is performing a voice service according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of another method for processing a terminal that is performing a voice service according to an embodiment of the present disclosure
  • FIG. 4 is a signaling flow diagram of a redirection process according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an apparatus for processing a terminal that is performing a voice service according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of another apparatus for processing a terminal that is performing a voice service according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a RAN device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of an apparatus for processing a terminal that is performing a voice service according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of another apparatus for processing a terminal that is performing a voice service according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a CN device according to an embodiment of the present application.
  • the RAN device is a device that accesses a terminal to a wireless network, including but not limited to: an evolved Node B (eNB), a radio network controller (RNC), and a Node B ( Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Baseband Unit (BaseBand Unit) , BBU), Wifi access point (Access Point, AP), etc.
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC Base Station Controller
  • BTS Base Transceiver Station
  • HNB Base Station
  • Baseband Unit Baseband Unit
  • BBU Baseband Unit
  • Wifi access point Access Point, AP
  • a terminal also known as a User Equipment (UE)
  • UE User Equipment
  • a terminal is a device that provides voice and/or data connectivity to a user, for example, a handheld device with wireless connectivity, an in-vehicle device, and a connection to Other processing devices for wireless modems, etc.
  • UE User Equipment
  • Redirection is an implementation method in which the terminal is re-selected to access the cell by releasing the terminal.
  • the re-accessed cell may be an original cell, or may be an inter-frequency cell or a hetero-system cell.
  • GBR bearer The dedicated network resource related to the Guaranteed Bit Rate (GBR) bearer is permanently allocated to a bearer through the admission control of the RAN device during the bearer establishment or modification process. This bearer is guaranteed to be constant at the bit rate. Otherwise, there is no guarantee that the rate of a bearer will not change, and it is a Non-GBR bearer.
  • the bearer type of the VOIP service is a GBR bearer
  • the voice service in the present application refers to a voice service based on the GBR bearer.
  • the VOIP service is a VOIP service based on the GBR bearer.
  • Multiple means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • the communication system includes a RAN device 110 and a core network (CN) device 120.
  • the terminal 130 accesses the wireless network through the RAN device 110, and implements mobility management of the terminal through the CN device 120. And to achieve communication between the terminal and the external network. If the current serving cell 111 of the terminal 130 is not good, for example, the terminal 130 moves to the edge of the cell 111, the terminal 130 can be cut into a better-frequency/inter-frequency neighboring area 112 by the same frequency switching or inter-frequency switching. This kind of handover needs to be reported by the measurement report of the same-frequency/inter-frequency neighboring area 112.
  • the cell edge usually has the characteristics of large interference and poor coverage.
  • the neighboring area measurement report is not reported to the RAN in time.
  • Device 110, RAN device 110 will not be able to initiate a handover procedure.
  • the measurement report of the inter-frequency neighboring cell may not be obtained, and the RAN device 110 cannot initiate the handover process.
  • the redirect can be initiated to release the terminal 130 to The terminal reselects the access cell, such as cell 112.
  • the terminal that is performing the voice service if the redirect is performed, the GBR bearer is released, causing the call drop, which seriously affects the user experience. Therefore, the terminal that is performing the voice service is not redirected.
  • the neighboring area measurement report is not reported to the RAN device 110 in time, and the RAN device 110 cannot initiate the handover process. It also caused business disruption and caused dropped calls. It can be seen that in this case, with the prior art solution, VOIP service interruption and dropped calls will inevitably occur.
  • This application proposes a solution considering the interruption of the VOIP service in the case where the current serving cell of the terminal is no longer suitable for continuing to provide services for the terminal.
  • the redirection is still performed for the terminal that is performing the voice service, but the redirection process is optimized, that is, the radio resource control (RRC) connection of the terminal is still released, and in the redirection process.
  • the RAN device notifies the CN device to reserve the GBR bearer of the terminal. Since the bearer type of the VOIP service is a GBR bearer, the bearer of the VOIP service will not be released.
  • the terminal accesses again (can be accessed through the new cell or through the original cell), the CN device can directly use the bearer.
  • the GBR bears to recover the voice service, avoids the interruption of the voice service caused by the release of the bearer of the VOIP service during the redirection process, reduces the call drop rate, and improves the voice communication quality.
  • FIG. 2 is a flowchart of a method for processing a terminal that is performing a voice service according to an embodiment of the present application.
  • the method is performed by the RAN device, as shown in FIG. 2, and includes the following steps:
  • the RAN device determines to release the RRC connection of the terminal that is performing the voice service based on the GBR bearer; the terminal that is performing the voice service is hereinafter referred to as a voice service terminal, and may also be referred to as a VOIP terminal, and may also be referred to as a VOIP terminal in the LTE system. For the VoLTE terminal.
  • S220 The RAN device instructs the CN device to reserve the GBR bearer of the terminal during the release process of the RRC connection of the terminal.
  • the RAN device performs active redirection on the voice service terminal, releases the RRC connection of the terminal, and instructs the CN device to reserve the voice service end during the release process. End of the GBR bearer. Since the bearer type of the VOIP service is a GBR bearer, the bearer of the VOIP service will not be released. When the terminal accesses again, the CN device can directly use the GBR bearer to recover the voice service, thereby avoiding the bearer of the VOIP service during the redirection process. Release voice service interruptions, reduce call drop rate, and improve user experience.
  • the voice service in this application is a general term for a type of service, which has the same quality of service (QoS) requirements, and the QoS requirement can be through a QoS Class Identifier (QoS Class Identifier, QCI) to reflect. Therefore, in the above step S210: the QCI can be used to determine whether the terminal is performing voice service.
  • QoS quality of service
  • QCI QoS Class Identifier
  • QCI1, QCI2, and QCI5 are all voice-related QCIs.
  • the QCI1 carries the voice service
  • the QCI2 carries the video service
  • the QCI5 carries the Session Initiation Protocol (SIP) signaling of the voice service, for example, the SIP signaling used to establish and release the voice service.
  • SIP Session Initiation Protocol
  • the voice service is established, it is completed by sending the SIP signaling to the CN device in the QCI5, triggering the CN device to establish the QCI1 bearer, or completing the QCI1 and QCI2 bearers for the videophone.
  • the corresponding SIP signaling is transmitted on the QCI5 to trigger the CN device to release the QCI1 to complete, or, for the videophone service, the CN device is triggered to release QCI1 and QCI2 to complete, and the call is considered to be ended. Therefore, it is determined whether the UE is performing a voice service, and the start and end can be determined by the SIP signaling of the QCI5; or can be determined by the bearer of the QCI1.
  • the RAN device may determine to release the RRC connection of the terminal when the current serving cell of the terminal cannot meet the quality of service requirement of the voice service being performed by the terminal.
  • This situation may include, but is not limited to, any of the following scenarios:
  • the RAN device can be implemented by determining whether the uplink signal quality or the downlink signal quality meets the quality of service requirements of the voice service, where the uplink signal quality or the downlink signal quality can be reported by the terminal. For example, the A2 measurement report reported by the terminal is obtained.
  • the voice service may be judged separately without distinguishing between the uplink and the downlink, for example, the quality requirement of the voice communication is set by using the threshold of the voice parameter, and the voice quality parameter is detected to determine whether the current voice quality of the terminal satisfies the requirement.
  • the voice parameters may include, for example, one or more of voice packet loss, voice delay, and voice rate.
  • the RAN device can determine based on the received single-direction voice packet. For example, when the uplink or downlink voice packet received by the RAN device is 0, the terminal is in a single-pass state, or a packet data convergence protocol. (Packet Data Convergence Protocol, PDCP) The uplink or downlink error packet probability of the layer voice packet is greater than a preset threshold, for example, 80%, and the terminal is in a single-pass state.
  • PDCP Packet Data Convergence Protocol
  • the uplink or downlink error packet probability of the layer voice packet is greater than a preset threshold, for example, 80%, and the terminal is in a single-pass state.
  • the RAN device can determine whether the bearer of the terminal establishment failure is a bearer belonging to the QCI1, and if yes, determine that the voice bearer establishment of the terminal fails.
  • the RAN device may also enter the overlapping area of Frequency Division Duplex (FDD) and Time Division Duplex (TDD) at the terminal, and the terminal does not support switching between FDD and TDD. Next, it is determined to release the RRC connection of the terminal. Alternatively, the RAN device may also determine to release the RRC connection of the terminal when the terminal enters the overlapping area of the inter-frequency cell and the terminal does not support the inter-frequency measurement. In summary, the present application does not limit the RRC connection of the RAN release terminal, and the RRC connection of the terminal may be released as long as the current serving cell is not suitable to continue to serve the terminal.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the RAN device may implement the pair by sending a release message to the CN device, and carrying the message indicating that the CN device retains the GBR bearer in the release message.
  • the CN device retains an indication of the GBR bearer.
  • the release message may be a UE Context Release Request message, and the cell may be the cause value information carried in the release message.
  • the reason value information may be an added cause value information, which is used to indicate that the release is performed for the voice service terminal, and therefore the CN device needs to reserve the GBR bearer of the voice service terminal.
  • the cause value information may also be cause value information that may indicate that the CN device reserves the GBR bearer of the terminal, such as user inactivity or inter-RAT redirection.
  • the UE context release request message can be compatible with the existing protocol, and the number of messages can be saved relative to the newly added message.
  • the user inactivity or the inter-RAT redirection information is used in the prior art only for the expiration of the user inactivity timer or the redirection of the different radio access technologies.
  • the scenario cannot be used for a voice service terminal.
  • the voice service terminal is used, and the existing cell can be directly used to implement the redirection of the voice service terminal.
  • the use of the added cause value information can better distinguish the voice service terminal, and is more targeted than the use of the existing cause value information.
  • the GBR bearer reserved by the CN device may be only for the GBR bearer of the ongoing voice service of the terminal, and is called a voice GBR bearer.
  • the CN device can determine whether the GBR bearer is a voice GBR bearer according to the QCI of the GBR bearer, and if yes, retain the voice GBR bearer, otherwise, release.
  • all the GBR bearers of the terminal may be reserved, so that the voice GBR bearer is also reserved for subsequent recovery of the voice service.
  • the redirection is an implementation manner.
  • the RAN device sends an RRC connection release message to the terminal to enable the terminal to perform the handover. Re-initiate random access and re-run the business.
  • the RRC connection release message may carry a frequency point, so that the terminal initiates random access to the neighboring area corresponding to the frequency point, and the frequency point may be a frequency point of an inter-frequency or different system neighboring area, so that the terminal may be in an inter-frequency or different frequency.
  • the system neighboring area initiates random access. It can be seen that the redirection method can be achieved as the switching method.
  • the redirection method omits the process of issuing a handover request to the neighboring cell. Compared with the real handover mode, the manner in which the terminal is transferred is different.
  • the frequency point carried in the above RRC connection release message may also include the frequency point of the original cell, so that the terminal may also select the original cell to re-access.
  • the foregoing method may further include the step of sending an RRC connection release message to the terminal, where the step is to release the S1 connection of the terminal, that is, as shown in FIG. 3, the method further includes the following steps:
  • the RAN device sends an RRC connection release message to the terminal.
  • step S230 there is no order requirement between the step S230 and the above step S220, and may be performed before the above step S220, after the above step S220, or may be performed simultaneously with the step S220.
  • the RAN device is an eNB
  • the CN device includes a Mobility Management Entity (MME) and a Serving GateWay (S-GW).
  • MME Mobility Management Entity
  • S-GW Serving GateWay
  • FIG. 4 is a signaling flow diagram of a redirection process according to an embodiment of the present application. As shown in FIG. 4, the process includes the following steps:
  • S401 The eNB determines to release an RRC connection of the voice service terminal.
  • the eNB sends an RRC connection release message to the voice service terminal to release the air interface resource of the terminal.
  • the eNB sends a UE context release request message to the MME.
  • the UE context release request message carries a cell for instructing the MME to reserve the GBR bearer of the voice service terminal.
  • the MME After receiving the UE context release request message sent by the eNB, the MME sends a release access bearers request message to the S-GW.
  • the S-GW is notified to release the access bearer of the terminal, that is, the S1 user plane (S1-U) bearer.
  • the S-GW releases the eNB-related information to the voice service terminal, and feeds back the release access bearers response to the MME to complete the release of the access bearer.
  • the other cells of the S-GW context of the terminal are not affected, and the S-GW retains the S1-U configuration allocated to the terminal, and starts to buffer the downlink packet of the terminal.
  • the MME reserves the GBR bearer of the voice service terminal.
  • the MME releases the GBR bearer of the terminal by sending a delete bearer command to the S-GW.
  • the MME may reserve the GBR bearer of the voice service terminal by not transmitting the delete bearer command.
  • the non-GBR (non-GBR) bearer is not deleted in the process, that is, the MME and the S-GW retain the non-GBR bearer.
  • step S406 only the voice GBR bearer may be reserved, and other GBR bearers may be released, and all GBR bearers may also be reserved. Only the voice GBR bearer can be reserved to make the reserved bearer more targeted, that is, only for the GBR bearer carrying the voice service, and to ensure the recovery of the voice service.
  • the MME sends a UE context release command to the eNB to release the S1 connection.
  • the eNB may directly perform the following step S408; otherwise, after the eNB sends the RRC connection release command to the terminal, the following step S408 is performed. . If the RRC connection release command is sent in the acknowledgment mode, after receiving the positive acknowledgment message, the following step S408 is performed.
  • S408 The eNB sends a UE Context Release Complete message to the MME.
  • the MME retains the GBR bearer of the voice service terminal.
  • the MME can directly establish a voice service bearer by using the GBR bearer to ensure that the voice service terminal can re-access the voice. Continue, no need to redial, use The user experience is good.
  • the terminal reselects the access cell to initiate a random access procedure
  • the reselected cell may be the original cell or a new cell.
  • the new cell may be located in the same eNB as the original cell, or may be located in different eNBs.
  • the same node is identified, but the node only represents it as an eNB, and may be the same eNB or a different eNB.
  • S409 The terminal sends an RRC setup request message to the eNB.
  • the eNB sends an RRC connection setup message to the terminal.
  • S411 The terminal sends an RRC setup complete message to the eNB.
  • the eNB After the RRC connection establishment is completed, the eNB sends an initial UE message to the MME (S412) to send a service request to the MME. In this manner, the MME may send an initial UE context setup request to the eNB according to the initial UE message. S413), because the GBR bearer of the previous voice service is not released, the MME may directly carry the QoS information of the terminal service (for example, QCI1) in the initial UE context setup request, so that the eNB establishes a radio bearer based on the QCI1, and The terminal is configured, such as wireless parameters and assigned wireless resources, so that voice communication can be recovered. The eNB can implement establishment of a radio bearer and configuration of the terminal through an RRC connection reconfiguration procedure. The eNB then feeds back an initial UE context setup response to the MME (S416).
  • the RRC connection reconfiguration process includes the following steps:
  • S414 The eNB sends an RRC connection reconfiguration message to the terminal.
  • S415 The terminal sends an RRC connection reconfiguration complete message to the eNB.
  • FIG. 5 is a schematic diagram of an apparatus for processing a terminal that is performing a voice service according to an embodiment of the present application.
  • the apparatus 500 is located in the RAN device, as shown in FIG. 5, and may include a determining unit 510 and an indicating unit 520.
  • the determining unit 510 is configured to determine that the release is positive
  • the RRC connection of the terminal that performs the voice service based on the GBR bearer is used to indicate that the CN device retains the GBR bearer of the terminal in the release process of the RRC connection of the terminal.
  • the terminal that performs the voice service based on the GBR bearer may be referred to as a voice service terminal.
  • the reserved GBR bearer may be a voice GBR bearer or all GBR bearers.
  • the determining unit 510 determines to release the RRC connection of the terminal in any of the following cases:
  • the current serving cell of the terminal cannot meet the quality of service requirements of the ongoing voice service of the terminal;
  • the terminal enters an overlapping area between the FDD and the TDD, and the terminal does not support switching between the FDD and the TDD;
  • the terminal enters an overlapping area of the inter-frequency cell, and the terminal does not support the inter-frequency measurement.
  • the instructing unit 520 may instruct the CN device to reserve the GBR bearer of the terminal by adding a cell for indicating that the CN device retains the GBR bearer of the terminal in the release message and transmitting the release message to the CN device.
  • the description of the release message and the cell is the same as the above method embodiment, and details are not described herein again.
  • the apparatus 500 may further include an air interface release unit 530, configured to send an RRC connection release message to the terminal to release the air interface resource of the terminal.
  • an air interface release unit 530 configured to send an RRC connection release message to the terminal to release the air interface resource of the terminal.
  • each of the above units may be a separately set processor, or may be implemented in one processor of the RAN device, or may be stored in the memory of the RAN device in the form of program code, by the RAN device.
  • One of the processors calls and executes the functions of each of the above units.
  • the individual units can be integrated or implemented independently.
  • the processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement the embodiments of the present application. Circuit.
  • FIG. 7 is a schematic structural diagram of a RAN device according to an embodiment of the present application.
  • the RAN device includes a processor 710, a memory 720, a first interface 730, and a second interface 740.
  • the memory 720, the first interface 730, and the second interface 740 are all connected to the processor 710, and the first interface 730 is used to communicate with the CN device, the second interface 740 is used to communicate with the terminal, and the memory 720 is used to store the program. .
  • the processor 710 invokes a program stored in the memory 720 to perform a method for processing a terminal that is performing voice service according to any one of the foregoing method embodiments, for example, performing the following operations:
  • the CN device is instructed to reserve the GBR bearer of the terminal during the release of the RRC connection of the terminal.
  • the terminal that performs the voice service based on the GBR bearer may be referred to as a voice service terminal.
  • the reserved GBR bearer may be a voice GBR bearer or all GBR bearers.
  • the RRC connection of the voice service terminal is released in the same manner as the above method embodiment, and details are not described herein again.
  • the processor 710 may generate a release message, where the release message carries a cell for instructing the CN device to reserve the GBR bearer of the terminal, and passes the first interface.
  • the 730 sends a release message to the CN device.
  • the description of the release message and the cell is the same as the above method embodiment, and details are not described herein again.
  • processor 710 may also generate an RRC connection release message and send the message to the terminal through the second interface 740 to release the air interface resource of the terminal.
  • processor 710 herein may be a processor or a collective name of multiple processing elements.
  • the processor may be a CPU or an ASIC, or may be configured to implement the embodiment of the present application.
  • One or more integrated circuits such as one or more digital singular processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).
  • DSPs digital singular processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 720 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the RAN device to operate. And the memory 720 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • RAM random access memory
  • the first interface 730 is configured to communicate with the CN device, and may be a wired interface or a wireless interface, for example, may be a fiber optic interface to connect the optical fiber connected to the CN device. This is by way of example only, any interface that can communicate with the CN device can be used.
  • the second interface 740 is configured to communicate with the terminal.
  • the implementation processor 710 is located on the baseband component, and can be connected to the radio frequency component through the second interface 740 to communicate with the terminal through the radio frequency component.
  • the second interface 740 can be a Common Public Radio Interface (CPRI).
  • CPRI Common Public Radio Interface
  • FIG. 8 is a schematic diagram of an apparatus for processing a terminal that is performing a voice service according to an embodiment of the present application.
  • the device 800 is located in the CN device, and includes a receiving unit 810 and a reservation unit 820, where the receiving unit 810 is configured to receive an indication that the RAN device sends to the CN device during the release of the RRC connection of the terminal, where the indication is used to indicate
  • the CN device retains the GBR bearer of the terminal, and the terminal performs a voice service based on the GBR bearer.
  • the retaining unit 820 is configured to reserve the GBR bearer of the terminal according to the indication.
  • the RAN device When the terminal accesses the wireless network again, the RAN device sends an initial terminal message to the CN device to send the service request of the terminal to the CN device.
  • the CN device can transmit the QoS information of the voice service of the terminal, for example, QCI1, to the RAN device, to restore the voice service of the terminal.
  • the apparatus 800 may further include a sending unit 830, configured to send QoS information of the voice service of the terminal to the RAN device when receiving the message initializing the terminal.
  • the CN device may send the QoS information to the RAN device by using an initial user equipment context establishment request, such as QCI1.
  • the GBR bearer reserved by the device 800 may be a voice GBR bearer or all GBR bearers. Please refer to Figure 9, when the reserved GBR bearer is a voice GBR bearer.
  • the apparatus 800 can also include a determining unit 840 for determining a voice GBR bearer in the GBR bearer of the terminal.
  • the notification reservation unit 820 then retains the voice GBR bearer.
  • each of the above units may be a separately set processor, or may be integrated in one processor of the CN device, or may be stored in the memory of the CN device in the form of program code, by the CN device.
  • One of the processors calls and executes the functions of each of the above units.
  • the individual units can be integrated or implemented independently.
  • the processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement the embodiments of the present application. Circuit.
  • the above receiving unit 810 and the transmitting unit 830 may receive information from the RAN device through an interface of communication between the CN device and the RAN device, and transmit the information to the RAN device.
  • FIG. 10 is a schematic structural diagram of a CN device according to an embodiment of the present application.
  • the CN device includes a processor 101, a memory 102, and an interface 103.
  • the memory 102 and the interface 103 are both connected to the processor 101, and the interface 103 is used for communication with the RAN device, and the memory 102 is used for storing programs.
  • the processor 101 invokes a program stored in the memory 102 to perform any of the methods performed by the CN device in the foregoing method embodiment to process the terminal that is performing the voice service, for example, to perform the following operations:
  • the GBR bearer of the terminal is reserved.
  • the RAN device When the terminal accesses the wireless network again, the RAN device sends an initial terminal message to the CN device to send the service request of the terminal to the CN device. At this time, the CN device can transmit the QoS information of the voice service of the terminal, for example, QCI1, to the RAN device, to restore the voice service of the terminal.
  • the above program also includes The instructions for the following operations:
  • the QoS information of the voice service of the terminal is sent to the RAN device.
  • the QoS information may be sent to the RAN device by an initial user equipment context setup request, such as QCI1.
  • the reserved GBR bearer may be a voice GBR bearer or all GBR bearers.
  • the above program also includes instructions for performing the following operations:
  • the method for releasing the RRC connection of the voice service terminal and the method for instructing the CN device to reserve the GBR bearer of the terminal are not described here.
  • the processor 101 herein may be a processor or a collective name of multiple processing elements.
  • the processor may be a CPU or an ASIC, or may be configured to implement the embodiment of the present application.
  • One or more integrated circuits such as one or more digital singular processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).
  • DSPs digital singular processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 102 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the RAN device to operate. And the memory 102 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • RAM random access memory
  • non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • the interface 103 is configured to communicate with the RAN device, which may be a wired interface or a wireless interface, for example, may be a fiber optic interface to connect the optical fiber connected to the RAN device. This is by way of example only, and any interface that can communicate with the RAN device can be used.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • the desired program code and any other medium that can be accessed by the computer may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.

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Abstract

本申请实施例提供了一种对正在进行语音业务的终端进行处理的方法、装置、以及通信***，在该方法中，RAN设备对语音业务终端进行主动的重定向，释放该终端的RRC连接，并在释放过程中，指示CN设备保留语音业务终端的GBR承载。由于VOIP业务的承载类型是GBR承载，因此VOIP业务的承载将不会被释放，当终端再次接入时，CN设备可以直接利用该GBR承载来恢复语音业务，避免重定向过程中VOIP业务的承载释放所导致的语音业务中断，减少掉话率，提高用户体验。

Description

对正在进行语音业务的终端进行处理的方法及装置、以及通信*** 技术领域
本申请涉及无线通信技术领域，尤其涉及对正在进行语音业务的终端进行处理的方法及装置、以及通信***。
背景技术
随着通信技术的发展，无线网络不断演进。目前，在长期演进(Long Time Evolution，LTE)网络中实现了全互联网协议(Internet Protocol，IP)化的架构，由于LTE网络只支持分组交换(Packet Switching，PS)域业务，因此语音业务承载在IP传输网络之上，故称之为基于互联网协议的语音(Voice over Internet Protocol，VOIP)业务，该VOIP业务在LTE***中也称为VoLTE业务。
随着LTE网络的大规模使用，VOIP业务越来越普及，如何提高语音通信质量也越来越受到关注。
发明内容
有鉴于此，本申请实施例提供一种对正在进行语音业务的终端进行处理的方法和装置、以及通信***，以减少语音通信过程中的掉话率，提高用户体验。
第一方面，本申请提供一种对正在进行语音业务的终端进行处理的方法。在该方法中，RAN设备确定释放正在进行基于保证比特速率(GBR)承载的语音业务终端的无线资源控制(RRC)连接；并指示核心网(CN)设备在该终端的RRC连接的释放过程中保留该终端的GBR承载。
相应于第一方面，第二方面，本申请提供一种对正在进行语音业务的终端进行处理的装置。该装置位于RAN设备中，且包括确定单元和指示单 元，其中确定单元用于确定释放正在进行基于GBR承载的语音业务终端的RRC连接；指示单元用于指示CN设备在该终端的RRC连接的释放过程中保留该终端的GBR承载。
相应于第一方面，第三方面，本申请提供一种RAN设备，包括处理器和存储器，存储器用于存储程序，处理器调用存储器存储的程序，以执行本申请第一方面种提供的方法。
可见，在以上各个方面，RAN设备对语音业务终端进行主动的重定向，释放该终端的RRC连接，并在释放过程中，指示CN设备保留语音业务终端的GBR承载。由于VOIP业务的承载类型是GBR承载，因此VOIP业务的承载将不会被释放，当终端再次接入时，CN设备可以直接利用该GBR承载来恢复语音业务，避免重定向过程中VOIP业务的承载释放所导致的语音业务中断，减少掉话率，提高用户体验。
以上各个方面中，保留的GBR承载可以是终端正在进行的语音业务的GBR承载(简称为语音GBR承载)，也可以是终端全部的GBR承载。保留语音GBR承载相对于保留全部GBR承载更具有针对性，不影响其它业务GBR承载的释放，在通信恢复时，仅恢复语音业务；而保留全部GBR承载实现更为简单，无需CN设备确定哪些GBR承载是语音GBR承载。
在以上各方面中，在以下任一情况下，确定释放终端的RRC连接：
终端的当前服务小区不能满足终端正在进行的语音业务的服务质量要求；在这种情况下，RAN设备可以在当前服务小区不足以为终端继续提供语音服务时，才启动RRC连接的释放，从而使得语音服务及时重定向到更加适合提供语音服务的小区中得以继续。
终端进入频分双工(FDD)与时分双工(TDD)的交叠区域，且该终端不支持FDD与TDD之间的切换；
所述终端进入异频小区的交叠区域，且该终端不支持异频测量。
在后面这两种情况下，RAN设备可以在可能出现掉话的场景下，启动 RRC连接的释放，从而使得语音服务及时重定向到异制式或异频小区中得以继续。
在以上各方面中，所述RAN设备可以通过向CN设备发送释放消息来指示CN设备保留该终端的GBR承载，其中，该释放消息携带用于指示CN设备保留该终端的GBR承载的信元。
该释放消息可以为S1用户设备上下文释放请求消息。信元可以为释放消息中携带的原因值信息。
该原因值信息可以是释放消息中增设的原因值信息，用于指示该RRC连接释放是针对正在进行基于GBR承载的语音业务的终端进行的。也可以是以下原因值信息：户不活动或异无线接入技术重定向。
在以上各方面中，所述RAN设备还向终端发送RRC连接释放消息，以释放与该终端的空口资源。例如在第二方面，所述装置还包括空口释放单元，用于向终端发送RRC连接释放消息。
第四方面，本申请还提供一种对正在进行语音业务的终端进行处理的方法，该方法由CN设备执行，包括：
接收RAN设备在释放终端的RRC连接的过程中发送给所述CN设备的指示，其中，所述指示用于指示该CN设备保留该终端的GBR承载，该终端正在进行基于GBR承载的语音业务；
根据该指示，保留该终端的GBR承载。
相应于第四方面，第五方面，本申请还提供一种对正在进行语音业务的终端进行处理的装置，该装置位于CN设备中，包括接收单元和保留单元。接收单元用于接收RAN设备在释放终端的RRC连接的过程中发送给该CN设备的指示，其中，该指示用于指示该CN设备保留该终端的GBR承载，且该终端正在进行基于GBR承载的语音业务；保留单元用于根据该指示，保留该终端的GBR承载。
相应于第四方面，第六方面，本申请提供一种CN设备，包括处理器和 存储器，存储器用于存储程序，处理器调用存储器存储的程序，以执行本申请第四方面种提供的方法。
在以上各方面中，CN设备还可以执行以下操作：
当接收到初始该终端的消息时，向RAN设备发送该终端的语音业务的QoS信息。其中，该CN设备可以通过初始用户设备上下文建立请求，将该QoS信息发送给RAN设备，该QoS信息例如为QCI1。此时，该CN设备还可以包括发送单元，用于执行该操作。
在以上各方面中，保留的GBR承载可以是终端正在进行的语音业务的GBR承载(简称语音GBR承载)，也可以是终端全部的GBR承载。当保留的GBR承载是语音GBR承载时，CN设备可以执行以下操作：
确定终端的GBR承载中的语音GBR承载。此时，该CN设备还可以包括确定单元，用于执行该操作。
可见，在本申请的各个方面，RAN设备对语音业务终端进行主动的重定向，释放该终端的RRC连接，并在释放过程中，指示CN设备保留语音业务终端的GBR承载。由于VOIP业务的承载类型是GBR承载，因此VOIP业务的承载将不会被释放，当终端再次接入时，CN设备可以直接利用该GBR承载来恢复语音业务，避免重定向过程中VOIP业务的承载释放所导致的语音业务中断，减少掉话率，提高用户体验。
附图说明
图1为本申请实施例提供的一种通信***的示意图；
图2为本申请实施例提供的一种对正在进行语音业务的终端进行处理的方法的流程图；
图3为本申请实施例提供的另一种对正在进行语音业务的终端进行处理的方法的流程图；
图4为本申请实施例提供的一种重定向过程的信令流图；
图5为本申请实施例提供的一种对正在进行语音业务的终端进行处理的装置的示意图；
图6为本申请实施例提供的又一种对正在进行语音业务的终端进行处理的装置的示意图；
图7为本申请实施例提供的一种RAN设备的结构示意图；
图8为本申请实施例提供的一种对正在进行语音业务的终端进行处理的装置的示意图；
图9为为本申请实施例提供的另一种对正在进行语音业务的终端进行处理的装置的示意图；
图10为本申请实施例提供的一种CN设备的结构示意图。
具体实施方式
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、RAN设备是一种将终端接入到无线网络的设备，包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station,BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(BaseBand Unit，BBU)、Wifi接入点(Access Point，AP)等。
2)、终端，又称之为用户设备(User Equipment，UE)，是一种向用户提供语音和/或数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备、连接到无线调制解调器的其他处理设备等。
3)、重定向(redirect)是一种实现方式，通过将终端释放，让终端重新选择接入小区的过程。该重新接入的小区可以是原小区，也可以是异频小区或异***小区。
4)、GBR承载：与保证比特速率(Guaranteed Bit Rate，GBR)承载相关的专用网络资源，在承载建立或修改过程中通过RAN设备的接纳控制等功能永久分配给某个承载。这个承载在比特速率上要求能够保证不变。否则，不能保证一个承载的速率不变，则是一个Non-GBR承载。根据VOIP业务的特性，VOIP业务的承载类型为GBR承载，且本申请中的语音业务是指基于GBR承载的语音业务，例如，VOIP业务为基于GBR承载的VOIP业务。
5)、“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图，描述本申请的实施例，所描述的实施例是本申请一部分实施例，而不是全部实施例。基于本申请的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例，都属于本申请保护的范围。
请参考图1，其为本申请实施例提供的一种通信***的示意图。如图1所示，该通信***包括RAN设备110和核心网(Core Network，CN)设备120，终端130通过RAN设备110接入无线网络，且通过CN设备120实现对终端的移动性等管理、以及实现终端与外部网络的通信。如果终端130当前服务小区111信号不好，例如终端130移动到小区111边缘，可以通过同频切换或异频切换，将终端130切入一个信号更好的同频/异频邻区112。这种切换需要依赖于同频/异频邻区112的测量报告的上报，但小区边缘通常有干扰大、覆盖差的特点，一旦由于干扰或覆盖的原因，邻区测量报告没有及时上报给RAN设备110，RAN设备110将无法发起切换流程。或者当终端不支持异频测量时，会导致异频邻区的测量报告无法获得，RAN设备110无法发起切换流程。此时，可以启动重定向，将终端130释放，以 便终端重新选择接入小区，例如小区112。
然而，对于正在进行语音业务的终端，如果进行重定向，会释放GBR承载，导致掉话，严重影响用户体验，因此对正在进行语音业务的终端不进行重定向。而同时，由于小区111的干扰或覆盖的原因，邻区测量报告没有及时上报给RAN设备110，RAN设备110将无法发起切换流程。同样导致业务中断，引起掉话。可见，这种情况下，采用现有技术方案，无可避免的会出现VOIP业务中断以及掉话。
本申请考虑到终端的当前服务小区已不再适合继续为终端提供服务的情况下，VOIP业务的中断问题，提出一种解决方案。在该方案中，对于正在进行语音业务的终端，仍然进行重定向，但优化了该重定向过程，即仍然释放该终端的无线资源控制(radio resource control，RRC)连接，且在重定向过程中，RAN设备通知CN设备保留该终端的GBR承载。由于VOIP业务的承载类型是GBR承载，因此VOIP业务的承载将不会被释放，当终端再次接入(可以通过新小区接入，也可以通过原小区接入)时，CN设备可以直接利用该GBR承载来恢复语音业务，避免重定向过程中VOIP业务的承载释放所导致的语音业务中断，减少掉话率，提高语音通信质量。
请参考图2，其为本申请实施例提供的一种对正在进行语音业务的终端进行处理的方法的流程图。该方法由RAN设备执行，如图2所示，包括如下步骤：
S210：RAN设备确定释放正在进行基于GBR承载的语音业务的终端的RRC连接；以下将该正在进行语音业务的终端称为语音业务终端，也可以称为VOIP终端，且在LTE***中又可以称为VoLTE终端。
S220：RAN设备指示CN设备在该终端的RRC连接的释放过程中保留该终端的GBR承载。
可见，在本实施例中，RAN设备对语音业务终端进行主动的重定向，释放该终端的RRC连接，并在释放过程中，指示CN设备保留语音业务终 端的GBR承载。由于VOIP业务的承载类型是GBR承载，因此VOIP业务的承载将不会被释放，当终端再次接入时，CN设备可以直接利用该GBR承载来恢复语音业务，避免重定向过程中VOIP业务的承载释放所导致的语音业务中断，减少掉话率，提高用户体验。
需要说明书的是，本申请中的语音业务是对一类业务的统称，这类业务有相同的服务质量(quality of service，QoS)需求，该QoS需求可以通过QoS分类识别码(QoS Class Identifier，QCI)来体现。因此，以上步骤S210中：可以通过QCI来判断终端是否正在进行语音业务。
例如，QCI1、QCI2和QCI5都是语音相关的QCI。其中，QCI1承载语音业务，QCI2承载视频业务，QCI5承载语音业务的会话初始化协议(Session Initiation Protocol，SIP)信令，例如，建立和释放语音业务所用的SIP信令。在建立语音业务时，通过在QCI5发送SIP信令给CN设备，触发CN设备建立QCI1承载来完成，或者，对于可视电话需要建立QCI1和QCI2承载来完成。在结束语音业务时，在QCI5上传输相应的SIP信令，以触发CN设备释放QCI1来完成，或者，对于可视电话业务，触发CN设备释放QCI1和QCI2来完成，认为通话结束。因此，判断UE是否在进行语音业务，可以通过QCI5的SIP信令来判断开始和结束；也可以通过QCI1的承载来判断。
此外，在以上步骤S210中，RAN设备可以在终端的当前服务小区不能满足终端正在进行的语音业务的服务质量要求时，确定释放终端的RRC连接。这种情况可以包括但不限于以下任一种场景：
a)终端的当前服务小区的上行覆盖不能满足终端正在进行的语音业务的服务质量要求；
b)终端的当前服务小区的下行覆盖不能满足终端正在进行的语音业务的服务质量要求；
c)终端的语音质量不满足要求；
d)终端处于单通状态；
e)终端的语音承载建立失败。
关于以上各个场景的判断，可以通过如下举例的技术手段实现，但这些仅为举例，并非用以现在本申请。例如，对于a)或b)的场景，RAN设备可以通过判断上行信号质量或者下行信号质量是否满足语音业务的服务质量要求来实现，其中上行信号质量或下行信号质量可以通过终端上报的测量报告，例如终端上报的A2测量报告，来获得。对于c)场景，可以不区分上行或下行，而专门针对语音业务进行判断，例如通过语音参数的阈值来设定语音通信的质量要求，通过检测语音参数来判断终端当前的语音质量是否满足该要求，该语音参数例如可以包括：语音丢包，语音时延以及语音速率中的一个或多个。对于d)场景，RAN设备可以基于收到的单方向的语音包的情况来判断，例如当RAN设备收到的上行或下行语音包为0时，则终端处于单通状态，或者分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)层语音包的上行或下行的错包概率大于预设门限，例如80％，则终端处于单通状态。对于e)场景，RAN设备可以判断终端的建立失败的承载是否是属于QCI1的承载，如果是，则判断该终端的语音承载建立失败。
此外，RAN设备也可以在终端进入频分双工(Frequency Division Duplex，FDD)与时分双工(Time Division Duplex，TDD)的交叠区域，且该终端不支持FDD与TDD之间的切换的情况下，确定释放该终端的RRC连接。或者RAN设备还可以在终端进入异频小区的交叠区域，且该终端不支持异频测量的情况下，确定释放该终端的RRC连接。总之，本申请对RAN释放终端的RRC连接的情况不做限制，只要是当前服务小区不适合在继续为该终端服务的情况下，均可以释放该终端的RRC连接。
在以上步骤S220中，RAN设备可以通过向CN设备发送释放消息，并在该释放消息中携带用于指示该CN设备保留GBR承载的信元来实现对 CN设备保留GBR承载的指示。该释放消息可以为UE上下文释放请求消息(UE Context Release Request message)，且信元可以为该释放消息中携带的原因值信息。且该原因值信息可以为增设的原因值信息，用于指示该释放是针对语音业务终端进行的，因此需要CN设备保留该语音业务终端的GBR承载。此外，该原因值信息也可以为目前可以指示CN设备保留该终端的GBR承载的原因值信息，例如用户不活动(user inactivity)或异无线接入技术重定向(Inter-RAT redirection)。其中，采用UE上下文释放请求消息可以与现有协议兼容，相对于新增消息可以节省消息数量。此外，用户不活动(user inactivity)或异无线接入技术重定向(Inter-RAT redirection)这些原因值信息在现有技术中仅用于用户不活动定时器到期或异无线接入技术重定向的场景，不能用于语音业务终端，本实施例将其用到语音业务终端，可以直接利用现有信元实现语音业务终端的重定向。较佳的，利用增设原因值信息可以更好的区分语音业务终端，相对于利用现有原因值信息更加有针对性。
另外，需要说明的是，CN设备保留的GBR承载可以只针对终端正在进行的语音业务的GBR承载，称为语音GBR承载。此时，CN设备可以根据GBR承载的QCI来判断该GBR承载是否为语音GBR承载，如果是，则保留该语音GBR承载，否则，释放。当然，也可以针对终端的全部GBR承载进行保留，如此语音GBR承载必然也会保留下来，以便后续语音业务的恢复。
需要说明的是，重定向是一种实现方式，当需要对终端执行切换过程，由于某些原因导致无法实现该切换，RAN设备通过给终端下发RRC连接释放(RRC connection release)消息，让终端重新发起随机接入并重新进行业务。通常该RRC连接释放消息可以携带频点，以便终端到该频点对应的邻区发起随机接入，该频点可以是异频或异***邻区的频点,如此终端可以在异频或异***邻区发起随机接入。可见，重定向方式同切换一样可以达到 终端在小区间转移的目的，但重定向方式省略了向邻区发出切换请求的过程，与真正切换方式相比，处理终端转移的方式不同。此外，以上RRC连接释放消息中携带的频点也可以包括原小区的频点，这样终端也可能选择原小区重新接入。
可见，以上方法还可以包括向终端发送RRC连接释放消息的步骤，该步骤，其用于释放终端的S1连接，即如图3所示，还包括如下步骤：
S230：RAN设备向终端发送RRC连接释放消息。
需要说明的是，该步骤S230与以上步骤S220之间没有顺序要求，且可以在以上步骤S220之前，也可以在以上步骤S220之后，或者可以与步骤S220同时进行。
下面以LTE***为例，结合信令流图详细描述以上重定向过程。在LTE***中，RAN设备为eNB，CN设备包括移动性管理实体(Mobility Management Entity，MME)和业务网关(Serving GateWay，S-GW)。请参考图4，其为本申请实施例提供的一种重定向过程的信令流图。如图4所示，该过程包括如下步骤：
S401：eNB确定释放语音业务终端的RRC连接。
关于如何确定语音业务终端，以及如何确定释放该语音业务终端的RRC连接，同以上实施例，在此不再赘述。
S402：eNB向语音业务终端发送RRC连接释放消息，以释放该终端的空口资源。
S403：eNB向MME发送UE上下文释放请求消息。该UE上下文释放请求消息中携带用于指示MME保留该语音业务终端的GBR承载的信元。
该信元同以上实施例的描述，可以为原因值信息，在此不再赘述。
S404：MME接收到eNB发送的UE上下文释放请求消息之后，向S-GW发送释放接入承载请求(release access bearers request)消息。以通知S-GW释放该终端的接入承载，即S1用户面(S1-U)承载。
S405：S-GW对该语音业务终端释放eNB相关的信息，向MME反馈释放接入承载响应(release access bearers response)，以完成接入承载的释放。
此时，终端的S-GW上下文的其它信元并不会受影响，S-GW会保留(retain)分配给该终端承载的S1-U配置，且开始缓存该终端的下行报文。
S406：MME保留(preserve)该语音业务终端的GBR承载。
现有技术中，MME通过向S-GW发送删除承载命令(delete bearer command)来释放终端的GBR承载。在此MME可以通过不发送该删除承载命令来保留该语音业务终端的GBR承载。此外，非GBR(non-GBR)承载在该过程中并不会被删除，即MME和S-GW会保留非GBR承载。另外，在步骤S406中，可以只保留语音GBR承载，而释放其它GBR承载，也可以保留全部GBR承载。只保留语音GBR承载可以使得保留的承载更具有针对性，即只针对承载语音业务的GBR承载，并保证语音业务的恢复。
S407：MME向eNB发送UE上下文释放命令(UE context release command)，来释放S1连接。
如果之前RRC连接已经被释放，如图中S420已经执行，即RRC连接释放命令已经发送给终端，则eNB可以直接进行以下步骤S408；否则eNB向终端发送RRC连接释放命令后，再执行以下步骤S408。如果RRC连接释放命令是通过确认模式发送的，则在收到肯定确认消息之后，再执行以下步骤S408。
S408：eNB向MME发送UE上下文释放完成(UE Context Release Complete)消息。
如此，对于该语音业务终端，MME和eNB之间的信令连接已经被释放。但由于在该释放过程中，MME保留了该语音业务终端的GBR承载，因此当语音业务重新接入时，MME可以直接利用该GBR承载建立语音业务承载，保证语音业务终端重新接入后语音可以继续，不用重新拨号，用 户体验良好。
请继续参考图4，终端重新选择接入小区发起随机接入过程，该重新选择的小区可以是原小区，也可以是新小区。此外，该新小区可以和原小区可以位于同一个eNB，也可以位于不同eNB。在图中为了简便起见，以同一个节点标识，但是该节点仅仅代表其为eNB，可以是相同的eNB，也可以是不同的eNB。终端重新选择小区接入时，会向重新选择的小区发起RRC连接建立过程，包括以下步骤S409-S411：
S409：终端向eNB发送RRC建立请求消息；
S410：eNB向终端发送RRC连接建立消息；
S411：终端向eNB发送RRC建立完成消息。
在RRC连接建立完成之后，eNB向MME发送初始UE消息(S412)，以将业务请求(service request)发送给MME；如此，MME可以根据该初始UE消息，向eNB下发初始UE上下文建立请求(S413)，由于之前语音业务的GBR承载未释放，因此MME可以在该初始UE上下文建立请求中直接携带终端业务的QoS信息(例如，QCI1)，以便eNB基于QCI1建立无线承载(radio bearer)，并配置终端，例如无线参数以及分配无线资源，如此，语音通信便可以恢复。eNB可以通过RRC连接重配置过程实现对无线承载的建立以及对终端的配置。而后eNB向MME反馈初始UE上下文建立响应(S416)。该RRC连接重配置过程包括以下步骤：
S414：eNB向终端发送RRC连接重配置消息；
S415：终端向eNB发送RRC连接重配置完成消息。
下面结合附图分别描述以上对正在进行语音业务的终端进行处理的方法在RAN设备中的实现。
请参考图5，其为本申请实施例提供的一种对正在进行语音业务的终端进行处理的装置的示意图。该装置500位于RAN设备中，如图5所示，可以包括确定单元510和指示单元520。其中，确定单元510用于确定释放正 在进行基于GBR承载的语音业务的终端的RRC连接；指示单元520用于指示CN设备在终端的RRC连接的释放过程中保留该终端的GBR承载。
同以上方法实施例，该正在进行基于GBR承载的语音业务的终端可以称为语音业务终端。此外，该保留的GBR承载可以为语音GBR承载，也可以为全部GBR承载。
关于何种情况下释放语音业务终端的RRC连接，同以上方法实施例，即确定单元510在以下任一情况下，确定释放所述终端的RRC连接：
终端的当前服务小区不能满足终端正在进行的语音业务的服务质量要求；
终端进入FDD与TDD的交叠区域，且该终端不支持FDD与TDD之间的切换；
终端进入异频小区的交叠区域，且该终端不支持异频测量。
详细不再描述，可以参考以上方法实施例。
指示单元520可以通过在释放消息中加入用于指示CN设备保留该终端的GBR承载的信元，并将释放消息发送给CN设备的方式，来指示CN设备保留该终端的GBR承载。关于释放消息和信元的描述同以上方法实施例，在此不再赘述。
请继续参考图6，该装置500还可以包括空口释放单元530，用于向终端发送RRC连接释放消息，以释放该终端的空口资源。
需要说明的是，以上各个单元可以为单独设立的处理器，也可以集成在RAN设备的某一个处理器中实现，此外，也可以以程序代码的形式存储于RAN设备的存储器中，由RAN设备的某一个处理器调用并执行以上各个单元的功能。此外各个单元可以集成在一起，也可以独立实现。这里所述的处理器可以是一个中央处理器(Central Processing Unit，CPU)，或者是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本申请实施例的一个或多个集成电路。
例如，请参考图7，其为本申请实施例提供的一种RAN设备的结构示意图。如图7所示，该RAN设备包括处理器710，存储器720，第一接口730和第二接口740。其中，存储器720、第一接口730和第二接口740均与处理器710相连接，且第一接口730用于与CN设备通信，第二接口740用于与终端通信，存储器720用于存储程序。
处理器710调用存储器720存储的程序，以执行以上方法实施例中任一种对正在进行语音业务的终端进行处理的方法，例如执行以下操作：
确定释放正在进行基于GBR承载的语音业务的终端的RRC连接；
指示CN设备在该终端的RRC连接的释放过程中保留该终端的GBR承载。
同以上方法实施例，该正在进行基于GBR承载的语音业务的终端可以称为语音业务终端。此外，该保留的GBR承载可以为语音GBR承载，也可以为全部GBR承载。
关于何种情况下释放语音业务终端的RRC连接，同以上方法实施例，在此不再赘述。
关于指示CN设备保留终端的GBR承载的方式，同以上方法实施例，处理器710可以生成释放消息，该释放消息携带用于指示CN设备保留该终端的GBR承载的信元，并通过第一接口730将释放消息发送给CN设备。关于释放消息和信元的描述同以上方法实施例，在此不再赘述。
此外，处理器710还可以生成RRC连接释放消息，并通过第二接口740发送给终端，以释放该终端的空口资源。
需要说明的是，这里的处理器710可以是一个处理器，也可以是多个处理元件的统称，例如，该处理器可以是CPU，也可以是ASIC，或者是被配置成实施本申请实施例的一个或多个集成电路，例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)。
存储器720可以是一个存储装置，也可以是多个存储元件的统称，且用于存储可执行程序代码或RAN设备运行所需要的参数、数据等。且存储器720可以包括随机存储器(RAM)，也可以包括非易失性存储器(non-volatile memory)，例如磁盘存储器，闪存(Flash)等。
第一接口730用于与CN设备通信，其可以为有线接口，也可以为无线接口，例如，可以为光纤接口，以连接与CN设备相连的光纤。这仅为举例，任何可以实现与CN设备通信的接口均可以使用。第二接口740用于与终端通信，在实现上处理器710位于基带部件上，可以通过该第二接口740与射频部件连接，通过射频部件与终端通信。例如，该第二接口740可以为通用公共无线电接口(Common Public Radio Interface，CPRI)。
请参考图8，其为本申请实施例提供的一种对正在进行语音业务的终端进行处理的装置的示意图。该装置800位于CN设备中，包括接收单元810和保留单元820，其中接收单元810用于接收RAN设备在释放终端的RRC连接的过程中发送给该CN设备的指示，其中，该指示用于指示该CN设备保留该终端的GBR承载，且该终端正在进行基于GBR承载的语音业务；保留单元820用于根据该指示，保留该终端的GBR承载。
当终端再次接入无线网络时，RAN设备会向CN设备发送初始终端消息，以将终端的业务请求发送给CN设备。此时CN设备由于之前保留了该终端的GBR承载，便可以将该终端的语音业务的QoS信息，例如QCI1发送给RAN设备，以恢复该终端的语音业务。请继续参考图8，此时，该装置800还可以包括发送单元830，用于当接收到初始该终端的消息时，向RAN设备发送该终端的语音业务的QoS信息。CN设备可以通过初始用户设备上下文建立请求，将该QoS信息发送给RAN设备，该QoS信息例如为QCI1。
同以上实施例，装置800保留的GBR承载可以是语音GBR承载，也可以是全部GBR承载。请参考图9，当保留的GBR承载是语音GBR承载 时，装置800还可以包括确定单元840，用于确定终端的GBR承载中的语音GBR承载。而后通知保留单元820保留该语音GBR承载。
需要说明的是，以上各个单元可以为单独设立的处理器，也可以集成在CN设备的某一个处理器中实现，此外，也可以以程序代码的形式存储于CN设备的存储器中，由CN设备的某一个处理器调用并执行以上各个单元的功能。此外各个单元可以集成在一起，也可以独立实现。这里所述的处理器可以是一个中央处理器(Central Processing Unit，CPU)，或者是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本申请实施例的一个或多个集成电路。此外，以上接收单元810和发送单元830可以通过CN设备与RAN设备之间的通信的接口从RAN设备接收信息，并将信息发送给RAN设备。
例如，请参考图10，其为本申请实施例提供的一种CN设备的结构示意图。如图10所示，该CN设备包括处理器101，存储器102，和接口103。其中，存储器102和接口103均与处理器101相连接，且接口103用于与RAN设备通信，存储器102用于存储程序。
处理器101调用存储器102存储的程序，以执行以上方法实施例中CN设备执行的任一种对正在进行语音业务的终端进行处理的方法，例如执行以下操作：
接收RAN设备在释放终端的RRC连接的过程中发送给该CN设备的指示，其中，该指示用于指示CN设备保留该终端的GBR承载，该终端正在进行基于GBR承载的语音业务；
根据该指示，保留该终端的GBR承载。
当终端再次接入无线网络时，RAN设备会向CN设备发送初始终端消息，以将终端的业务请求发送给CN设备。此时CN设备由于之前保留了该终端的GBR承载，便可以将该终端的语音业务的QoS信息，例如QCI1发送给RAN设备，以恢复该终端的语音业务。此时，以上程序还包括用于执 行以下操作的指令：
当接收到初始该终端的消息时，向RAN设备发送该终端的语音业务的QoS信息。例如，可以通过初始用户设备上下文建立请求，将该QoS信息发送给RAN设备，该QoS信息例如为QCI1。
另外，保留的GBR承载可以是语音GBR承载，也可以是全部GBR承载。当保留的GBR承载是语音GBR承载时，以上程序还包括用于执行以下操作的指令：
确定终端的GBR承载中的语音GBR承载。
关于何种情况下释放语音业务终端的RRC连接，以及指示CN设备保留终端的GBR承载的方式，同以上方法实施例，在此不再赘述。
需要说明的是，这里的处理器101可以是一个处理器，也可以是多个处理元件的统称，例如，该处理器可以是CPU，也可以是ASIC，或者是被配置成实施本申请实施例的一个或多个集成电路，例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)。
存储器102可以是一个存储装置，也可以是多个存储元件的统称，且用于存储可执行程序代码或RAN设备运行所需要的参数、数据等。且存储器102可以包括随机存储器(RAM)，也可以包括非易失性存储器(non-volatile memory)，例如磁盘存储器，闪存(Flash)等。
接口103用于与RAN设备通信，其可以为有线接口，也可以为无线接口，例如，可以为光纤接口，以连接与RAN设备相连的光纤。这仅为举例，任何可以实现与RAN设备通信的接口均可以使用。
通过以上的实施例的描述，所属领域的技术人员可以清楚地了解到本申请可以用硬件实现，或固件实现，或它们的组合方式来实现。当使用软件实现时，可以将上述功能存储在计算机可读介质中或作为计算机可读介 质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如，如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的，那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。
总之，以上所述仅为本申请技术方案的较佳实施例而已，并非用于限定本申请的保护范围。凡在本申请的原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种对正在进行语音业务的终端进行处理的方法，包括：
    无线接入网RAN设备确定释放终端的无线资源控制RRC连接，所述终端正在进行基于保证比特速率GBR承载的语音业务；
    所述RAN设备指示核心网CN设备在所述终端的RRC连接的释放过程中保留所述终端的GBR承载。
  2. 如权利要求1所述的方法，其特征在于，所述保留的GBR承载为所述终端正在进行的所述语音业务的GBR承载或所述终端全部的GBR承载。
  3. 如权利要求1或2所述的方法，其特征在于，所述RAN设备在以下任一情况下，确定释放所述终端的RRC连接：
    所述终端的当前服务小区不能满足所述终端正在进行的所述语音业务的服务质量要求；
    所述终端进入频分双工FDD与时分双工TDD的交叠区域，且所述终端不支持FDD与TDD之间的切换；或
    所述终端进入异频小区的交叠区域，且所述终端不支持异频测量。
  4. 如权利要求1至3任一项所述的方法，其特征在于，所述RAN设备指示CN设备在所述终端的RRC连接的释放过程中保留所述终端的GBR承载，包括：
    所述RAN设备向所述CN设备发送释放消息，所述释放消息携带用于指示所述CN设备保留所述终端的GBR承载的信元。
  5. 如权利要求4所述的方法，其特征在于，所述释放消息包括S1用户设备上下文释放请求消息。
  6. 如权利要求4或5所述的方法，其特征在于，所述信元为原因值信息。
  7. 如权利要求6所述的方法，其特征在于，所述原因值信息用于指示 所述RRC连接释放是针对正在进行基于GBR承载的语音业务的终端进行的。
  8. 如权利要求6所述的方法，其特征在于，所述原因值信息为用户不活动或异无线接入技术重定向。
  9. 如权利要求1至8任一项所述的方法，其特征在于，还包括：
    所述RAN设备向所述终端发送RRC连接释放消息。
  10. 一种对正在进行语音业务的终端进行处理的装置，包括：
    确定单元，用于确定释放终端的无线资源控制RRC连接，所述终端正在进行基于保证比特速率GBR承载的语音业务；
    指示单元，用于指示核心网CN设备在所述终端的RRC连接的释放过程中保留该终端的GBR承载。
  11. 如权利要求10所述的装置，其特征在于，所述保留的GBR承载为终端正在进行的所述语音业务的GBR承载或所述终端全部的GBR承载。
  12. 如权利要求10或11所述的装置，其特征在于，所述确定单元在以下任一情况下，确定释放所述终端的RRC连接：
    所述终端的当前服务小区不能满足终端正在进行的语音业务的服务质量要求；
    所述终端进入频分双工FDD与时分双工TDD的交叠区域，且该终端不支持FDD与TDD之间的切换；
    所述终端进入异频小区的交叠区域，且该终端不支持异频测量。
  13. 如权利要求10至12任一项所述的装置，其特征在于，所述指示单元用于：
    向所述CN设备发送释放消息，所述释放消息携带用于指示所述CN设备保留所述终端的GBR承载的信元。
  14. 如权利要求13所述的装置，其特征在于，所述释放消息包括S1用户设备上下文释放请求消息。
  15. 如权利要求13或14所述的装置，其特征在于，所述信元为原因值信息。
  16. 如权利要求15所述的装置，其特征在于，所述原因值信息用于指示所述RRC连接释放是针对正在进行基于GBR承载的语音业务终端进行的。
  17. 如权利要求15所述的装置，其特征在于，所述原因值信息为用户不活动或异无线接入技术重定向。
  18. 如权利要求10至17任一项所述的装置，其特征在于，还包括：
    空口释放单元，用于向所述终端发送RRC连接释放消息。
  19. 一种通信***，包括：无线接入网RAN设备、与该RAN设备连接的核心网CN设备，其中所述RAN设备包括如权利要求10至18任一项所述的装置。
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CN109151941B (zh) * 2017-06-28 2020-07-07 ***通信有限公司研究院 一种实现业务初始化重定向、切换的方法和基站
CN110557757A (zh) * 2018-06-04 2019-12-10 中国电信股份有限公司 建立承载的方法、网关设备和计算机可读存储介质
CN110557757B (zh) * 2018-06-04 2022-08-30 中国电信股份有限公司 建立承载的方法、网关设备和计算机可读存储介质
CN111148195A (zh) * 2019-07-31 2020-05-12 广东小天才科技有限公司 一种降低终端设备功耗的方法、***及终端设备
CN111148195B (zh) * 2019-07-31 2023-05-23 广东小天才科技有限公司 一种降低终端设备功耗的方法、***及终端设备
CN115065967A (zh) * 2022-03-10 2022-09-16 北京小米移动软件有限公司 终端控制方法及装置、电子设备、存储介质
CN115065967B (zh) * 2022-03-10 2024-05-07 北京小米移动软件有限公司 终端控制方法及装置、电子设备、存储介质

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JP6699913B2 (ja) 2020-05-27
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