WO2010088795A1 - 承载处理方法、装置及附着方法、装置 - Google Patents

承载处理方法、装置及附着方法、装置 Download PDF

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Publication number
WO2010088795A1
WO2010088795A1 PCT/CN2009/070349 CN2009070349W WO2010088795A1 WO 2010088795 A1 WO2010088795 A1 WO 2010088795A1 CN 2009070349 W CN2009070349 W CN 2009070349W WO 2010088795 A1 WO2010088795 A1 WO 2010088795A1
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Prior art keywords
bearer
handover
default
established
default bearer
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PCT/CN2009/070349
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English (en)
French (fr)
Inventor
陈卓
郭小龙
Original Assignee
深圳华为通信技术有限公司
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 深圳华为通信技术有限公司 filed Critical 深圳华为通信技术有限公司
Priority to PCT/CN2009/070349 priority Critical patent/WO2010088795A1/zh
Priority to PCT/CN2009/071540 priority patent/WO2010088805A1/zh
Publication of WO2010088795A1 publication Critical patent/WO2010088795A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/21Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the embodiments of the present invention relate to the field of networks, and in particular, to a bearer processing method, apparatus, and attaching method and apparatus. Background technique
  • LTE Long Term Evolved
  • SAE System Architecture Evolved
  • IP Internet Protocol
  • one or more activated dedicated bearer messages can be associated with an attach accept message in a attach procedure or a packet data network (Packet Data Network, PDN) connectivity procedure requested by a user.
  • PDN connectivity accept messages are coupled together and sent to the evolved network base station (eNB) and the user equipment (User Equipment, hereinafter referred to as UE) through the S1-MME interface and the air interface in the LTE/SAE network.
  • eNB evolved network base station
  • UE User Equipment
  • Evolved Universal Terrestrial Radio Access Network (E-UTRAN) node (such as an eNB) cannot successfully establish a default bearer
  • Evolved Packet Core Network (hereinafter referred to as the Evolved Packet Core Network)
  • the dedicated bearer deactivation process initiated by the EPC) node (such as Mobility Management Entity (hereinafter referred to as ⁇ )) is only applicable to the release of dedicated bearers, but not for release.
  • the default bearer is placed, so the information and resources of the corresponding default bearer cannot be released by using the flow, and the prior art does not specify the processing behavior of the UE and the EPC in this case.
  • the EPC node When the eNB performs an X2 or S1 handover for the UE, the EPC node needs/requests the eNB to perform a new bearer processing procedure for the UE, which may cause a problem of resource waste or interoperability between different devices, affecting the system. performance. Summary of the invention
  • Embodiments of the present invention provide a bearer processing method, apparatus, and attaching method and apparatus.
  • the response message may include indication information indicating the reason why the bearer is not established.
  • a sixth bearer processing method includes:
  • the source radio access network RAN node receives the core network node request to perform the S1 interface process, the source RAN node sends an S1 interface processing rejection response/instruction message to the core network node;
  • the core network node processes the reject response/indication message according to the S1 interface, suspending the
  • the source RAN node continues to perform the handover procedure
  • the S1 interface process is performed; when the handover is successful, the S1 interface process is processed according to the handover result.
  • the network node sends an initial context setup request message to the base station; the evolved packet system EPS session management information in the initial context setup request message is not bound to the EPS mobility management information.
  • a determining module configured to determine, according to the received bearer setup request message, whether a default bearer can be established
  • a bearer establishing module configured to establish a default bearer when it is determined that a default bearer can be established; and establish a dedicated bearer after establishing a default bearer; or, establish a default bearer and a dedicated bearer at the same time;
  • the response message is returned; the response message includes indication information indicating that the reason for the bearer is not established.
  • the learning module is configured to learn that the default bearer is not successfully established
  • the deletion module is configured to delete the related context when it is learned that the default bearer is not successfully established.
  • the third bearer processing device provided by the embodiment of the present invention includes:
  • the learning module is configured to learn that the default bearer is not successfully established
  • An execution module configured to re-initiate the default bearer when the default bearer is not successfully established. Try it.
  • the learning module is configured to learn that the default bearer is not successfully established
  • the rejecting module is configured to refuse to continue to execute the handover process when it is learned that the default bearer is not successfully established during the execution of the handover process.
  • a sending module configured to send a handover cancel/instruction message to the destination RAN node if the source radio access network RAN node receives the request to perform the S1 interface process in the X2 handover process; After the RAN node terminates the handover process, the S1 interface process is executed.
  • a sending module configured to: when the source radio access network RAN node receives the request that the core network node needs to perform the S1 interface process, sends an S1 interface processing rejection response/instruction message to the core network node;
  • An execution module configured to continue to perform the switching process after the core network node suspends the S1 interface process
  • the processing module is configured to: when the handover fails, execute the S1 interface process; when the handover succeeds, process the S1 interface process according to the handover result.
  • a sending module configured to send an initial context setup request message; the EPS session management information of the evolved packet system in the initial context setup request message is not bound to the EPS mobility management information.
  • FIG. 1 is a flowchart of Embodiment 1 of a first bearer processing method according to the present invention
  • 2 is a flowchart of Embodiment 1 of a second bearer processing method according to the present invention
  • FIG. 3 is a flowchart of a fourth bearer processing method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of an embodiment of a fifth bearer processing method provided by the present invention.
  • FIG. 5 is a flowchart of a first embodiment of a bearer processing method according to the present invention
  • FIG. 6 is a schematic structural diagram of an embodiment of a first bearer processing apparatus according to the present invention
  • FIG. 8 is a schematic structural diagram of an embodiment of a third type of bearer processing apparatus according to the present invention
  • FIG. 9 is a schematic structural diagram of an embodiment of a fourth type of bearer processing apparatus according to the present invention
  • FIG. 11 is a schematic structural diagram of an embodiment of a sixth type of bearer processing apparatus provided by the present invention.
  • the currently determined solution is: when the UE attaches to the network through E-UTRAN or the user activates a new PDN connection (eg, the user requests PDN connectivity), The network allocates a packet data protocol (PDP) address (that is, a PDN address, usually an IP address, which is described by taking an IP address as an example); and establishes a default bearer context (Default). Bearer Context); Of course, the UE and/or the network may also establish other bearer (referred to as a proprietary bearer) context for the PDN connection.
  • PDP packet data protocol
  • Default bearer context
  • the UE and the EPC must establish at least one bearer (ie, the default bearer) for this PDN connection throughout the connection.
  • a UE can access multiple PDNs at the same time.
  • One user can establish multiple PDN connections for each PDN.
  • One user must have one and only one default bearer for each PDN connection.
  • One user can simultaneously connect to each PDN. There are zero, one or more dedicated bearers.
  • each bearer has a unique identifier (the identifier is a bearer identifier), and the UE and the EPC node can distinguish between the default bearer and the dedicated bearer, and the E-UTRAN cannot distinguish the default bearer. And dedicated bearers.
  • the network In addition to the user attach procedure, in the PDN connectivity process requested by the user, the network also establishes a default bearer for the user to a specific PDN connection. In addition, during the user attach and establishment of the default bearer, the network may also initiate the establishment of a dedicated bearer (or dedicated bearer activation), that is, in the user attach procedure or the PDN connectivity procedure requested by the user, the network Dedicated bearer activation can be initiated at the same time, such that the default bearer is established/activated with the dedicated bearer.
  • a dedicated bearer or dedicated bearer activation
  • the radio access network since the bearer information is different between the UE, the radio access network, and the core network, for example, the radio access network only reflects the bearer information of the access layer, and the UE and the core network can also represent the non-access stratum bearer. Information, therefore, for the core network node (such as the MME), only after receiving the message that the access layer (AS) bearer fed back by the eNB and the non-access stratum (NAS) bearer fed back by the UE are successfully established, the MME will The 7-year establishment was considered successful.
  • the core network node such as the MME
  • the corresponding message flow is established for the S1-MME interface processing, and is completed by the initial context establishment process when attaching.
  • the initial context setup request message includes a bearer list (E-RAB to Be Setup List) that the core network node (such as the MME) needs to establish by the radio access network (such as an eNB), and the required QoS and related transport bearers. Information and other parameters. As shown in Table 1, for the message structure of such a bearer list, only the information related to the present invention is shown in Table 1.
  • GTP Routing Information GTP Routing Information
  • the bearer is the bearer corresponding to the bearer identifier.
  • the NAS information is the information exchanged between the EPC node and the UE, and is bound to the corresponding bearer identifier (E-RAB ID).
  • the eNB transparently transmits NAS information between the UE and the EPC node without parsing the information.
  • the eNB After the eNB receives the initial context setup request message, if the context can be established for the UE and necessary resources are used to establish some or all of the required bearers, the eNB will pass the radio resource control of the AS layer on the air interface (Radio Resource Control, below) Abbreviation: RRC) The connection reconfiguration process continues to establish the corresponding AS layer data radio bearer for the UE. At this time, the eNB transmits the NAS information corresponding to the bearer that can be established to the UE through the RRC connection reconfiguration process. After receiving the NAS information, the AS layer of the UE forwards the information to the NAS layer of the UE, which is completed by the NAS layer of the UE.
  • RRC Radio Resource Control
  • the NAS layer carries the activation of the information, and the information such as the bearer activation of the NAS layer is transparently transmitted to the MME through the eNB.
  • the eNB is unable to establish certain bearers, the NAS information corresponding to the bearers is not transmitted to the UE through the eNB. Therefore, the NAS layer of the UE does not activate the corresponding NAS layer bearer information.
  • the MME passes the NAS layer attach and accept message sent by the eNB to the UE, and also includes the NAS layer bearer information required for establishing the default bearer, that is, the default bearer corresponding to The NAS information is bound to the NAS information corresponding to the attach accept message.
  • Table 2 for the attach accept message structure, only the information related to the present invention is shown in Table 2.
  • ESM message container Session management message container (including default bearer establishment information)
  • the above message structure essentially means that an EPS session management (EPS) is included in an Evolved Packet System (EPS) mobility management (EPS Mobility Management, EMM) message (Attach Accept). Session Management, hereinafter referred to as ESM message container, is bound to each other.
  • EPS Evolved Packet System
  • EMM Evolved Packet System
  • EMM Evolved Packet System
  • Session Management hereinafter referred to as ESM message container, is bound to each other.
  • the eNB feeds back the AS layer bearer setup status to the MME through the initial context setup response message, including establishing an E-RAB Setup List and a list of bearers that may not be established. (E-RAB Failed to Setup List).
  • the NAS layer of the UE also feeds back to the MME the establishment of bearer information of the NAS layer. For a bearer that successfully establishes (both the access layer and the non-access stratum are successfully established), the core network node will continue to complete the bearer establishment process on the core network side.
  • the core network side releases the information and resources of the corresponding bearer through the dedicated bearer deactivation process initiated by the MME. At the same time, this process only Applicable to release dedicated bearers, not applicable to release default bearers.
  • the eNB When the eNB cannot establish certain bearers, the eNB will not use the non-access stratum corresponding to these bearers.
  • NAS Non-Access Stratum, hereinafter referred to as NAS
  • NAS Non-Access Stratum, hereinafter referred to as NAS
  • the eNB fails to establish the default bearer, the NAS information corresponding to the default bearer cannot be delivered to the UE. That is, the attached NAS information (such as the Attach Accept message) bound to the default bearer is not transmitted.
  • the UE information is sent to the UE, and the NAS information corresponding to other successfully established dedicated bearers is delivered to the UE.
  • the UE can receive the NAS information related to the establishment of the dedicated bearer (and establish the NAS layer bearer information), but cannot receive the NAS information related to the default bearer (that is, the default bearer information cannot be established) and the attached accepting EMM information, the UE does not receive the attach accept message, and the registration process to the network cannot be completed.
  • the ESM factor bearer establishment
  • the prior art does not specify the subsequent behavior of the UE.
  • an EPC node such as MME
  • an E-UTRAN node such as an eNB
  • the bearer establishment includes establishing a successful bearer list (such as E-RAB Setup List) and an unestablished bearer list (such as E-RAB Failed to Setup List).
  • E-RAB Setup List such as E-RAB Setup List
  • E-RAB Failed to Setup List an unestablished bearer list
  • the switching process occurs when a user needs to change the network node of their service due to mobility or other reasons.
  • Switching according to the scenario classification can be divided into internal access system switching (such as ⁇ 2 switching within the LTE access system, S1 switching) and different inter-system switching (such as switching between 2G/3G and LTE systems).
  • internal access system switching such as ⁇ 2 switching within the LTE access system, S1 switching
  • inter-system switching such as switching between 2G/3G and LTE systems.
  • the embodiment of the present invention introduces the internal handover of the LTE system as an example, but the method of the present invention is not limited to the internal LTE system, but can be applied to a scenario of cross-system handover.
  • the target radio access network (Radio Access Network, hereinafter referred to as RAN) node receives the handover request message of the EPC node (such as the MME), and then determines whether it is acceptable, if it can be the UE.
  • the context is established and necessary resources are needed to establish some or all of the required bearers, and the eNB will feed back to the MME through the handover request response message.
  • the eNB informs the MME of the bearer list that can be established and the bearer list that cannot be established, including the E-RABs Admitted List and the E-RAB Failed to Setup List. .
  • the core network node For the bearer successfully established by the target eNB, the core network node will continue to complete the handover process. For the bearer that is not established by the target eNB, the core network side releases the information and resources of the corresponding bearer through the dedicated bearer deactivation process initiated by the MME. (Note: This procedure is only applicable to releasing the dedicated bearer, but not for releasing the default bearer. ), the UE will also delete the relevant resources locally.
  • the target RAN node (such as the target eNB) receives the handover request message of the source RAN node (such as the source eNB), it determines whether it is acceptable, if the context can be established for the UE and necessary resources are needed to establish part or all of Required bearer, then the target eNB will be switching The request response message is fed back to the source eNB. Thereafter, the target eNB may inform the EPC node (such as the MME) of the list of bearers that can be established through the channel switching message flow, and the bearer list includes a list of successfully established bearers. For the bearer successfully established by the target eNB, the core network node will continue to complete the handover process.
  • the EPC node such as the MME
  • the core network side releases the information and resources of the corresponding bearer through the dedicated bearer deactivation process initiated by the MME. (Note: This procedure is only applicable to releasing the dedicated bearer, but not for releasing the default bearer. ).
  • the source eNB also informs the UE of the successful bearer and the bearer that needs to be released through the air interface message, and also deletes the related resources locally. If the target eNB establishes a successful bearer, the UE then switches to the target eNB, and the bearer that is not established by the target eNB also releases the information and resources of the corresponding bearer.
  • the dedicated bearer or the dedicated bearer will be released.
  • the EPC node finds that the target eNB cannot successfully establish the default bearer for various reasons, it is not suitable to use the dedicated bearer deactivation process initiated by the MME to release the information and resources of the corresponding bearer (because the process is only applicable to the release dedicated Bearer, but not for releasing the default bearer), and the processing behavior of the UE and EPC is also not specified.
  • the new PDN can be accessed through the PDN connectivity procedure requested by the user.
  • the default bearer and dedicated bearer can be established at the same time.
  • the processing behavior of the UE and the EPC node is also not specified.
  • the location update process occurs, if the user or the network considers it necessary to establish the access layer bearer at the same time, the default bearer and the dedicated bearer can be established at the same time in the location update process.
  • the EPC node may not know that the UE is performing X2 handover for a period of time.
  • the eNB may reject the MME request if the EPC node needs/requests the eNB to perform a new S1-MME interface procedure for the UE (such as establishing or modifying the bearer, transparently transmitting NAS information, etc.). And inform the MME that the reason for the rejection is because the UE is performing the handover.
  • the MME will wait for the handover to complete successfully or after the handover fails, and then retry the previously described S1-MME interface process.
  • the RAN node such as an eNB
  • the EPC node such as the MME and/or the Serving Gateway (hereinafter referred to as SGW) And/or the packet data network gateway (PDN Gateway, hereinafter referred to as PGW).
  • SGW Serving Gateway
  • PGW packet data network gateway
  • the source eNB can take the following two processing modes. : Cancel the ongoing handover process and perform the bearer processing flow; or terminate the bearer processing flow and continue the handover process.
  • the eNB When the eNB performs the X2 handover for the UE, if the handover is successfully performed (partial bearer handover is successful or all bearer handover is successful), if only part of the bearer handover is successful, those bearers that have not successfully switched are released by the UE and the network. This means that after the handover is over, the bearer information of the UE may have changed, such as: Some bearers have been deleted. At this time, if the MME continues to retry the previously described S1-MME interface process (such as the bearer modification process) after the handover is successfully completed, it may become meaningless because the bearer may have been deleted. MME does not have to try again. Therefore, current technical solutions may result in unnecessary operational and resource consumption, affecting system performance and efficiency.
  • S1-MME interface process such as the bearer modification process
  • the RAN node for example, the eNB, the same below
  • the EPC such as the MME and/or the SGW and / or PGW
  • the source eNB can learn the above two One of the processing methods, but which one is used depends on the implementation of each device, which may lead to interoperability problems between different devices, bringing complexity to network performance.
  • the present invention proposes the following embodiments to solve the problems existing in the prior art.
  • FIG. 1 is a flowchart of Embodiment 1 of a first bearer processing method according to the present invention, which specifically includes the following steps:
  • Step 101 according to the received bearer setup request message, determine whether the default bearer can be established, and if so, step 102 is performed; otherwise, step 103 is performed;
  • Step 102 After establishing a default bearer, establishing a dedicated bearer; or establishing a default bearer and a dedicated bearer at the same time;
  • Step 103 Return a response message; the response message may include indication information indicating that the reason for the bearer is not established.
  • This embodiment may be applied to an initial context establishment process, a handover procedure, a PDN connectivity procedure requested by a user, or a location update procedure in which an access layer bearer needs to be established.
  • the default bearer is first established, and the dedicated bearer is considered to be established on the premise that the default bearer can be successfully established. If the default bearer cannot be established successfully, the dedicated bearer does not need to be established, and the response message is directly returned.
  • This embodiment avoids the situation that the default bearer is not successfully established and the dedicated bearer has been established, thereby solving the problem of resource waste caused by the situation.
  • the bearer setup request message is a default bearer setup request message that includes default bearer information and does not include dedicated bearer information, where the establishment of the dedicated bearer is specifically: according to the received dedicated bearer.
  • Request message establish a dedicated dedicated dedicated bearer.
  • the initial context setup request message which is the default bearer setup request message, includes the default bearer information but does not include the dedicated bearer information.
  • the initial context establishment process may be an attach procedure, or a UE initiated service request. The process, or the location update process that needs to be established by the access layer.
  • the message structure of the default bearer list that the MME wants the eNB to establish is included in the initial context setup request message of the embodiment, and only the information related to the embodiment is shown in the message.
  • the radio bearer setup request message when the default bearer and the dedicated bearer are established by the radio access bearer setup procedure in the PDN connectivity process requested by the UE, the radio bearer setup request message includes the default bearer information and does not include the dedicated bearer.
  • the specific message structure of the information is similar to that of Table 3, and details are not described herein again.
  • the eNB and the UE determine whether the required default bearer can be established, and if yes, continue the initial context establishment process, and establish a dedicated bearer.
  • the dedicated bearer setup request message may be initiated to establish a dedicated bearer;
  • the response message is not required to be processed, and the response message is returned, and the response message includes indication information indicating that the reason for the bearer is not established.
  • the above response message may be a new message, or may be an existing message to which the indication information is added, such as an initial context setup response message or a handover response message or a user PDN connectivity response message.
  • a default bearer is first established, and the default bearer can be successfully established. If a default bearer cannot be established successfully, it is not necessary to establish a dedicated bearer and directly return a response message. This embodiment avoids the situation that the default bearer is not successfully established and the dedicated bearer has been established, thereby solving the problem of resource waste caused by the situation.
  • the bearer setup request message includes default bearer information and dedicated bearer information.
  • the bearer setup request message further includes priority information established by default bearer, or Specific indication information established by default bearer.
  • the initial context setup request message which is the bearer setup request message, includes both the default bearer information and the dedicated bearer information.
  • the initial context establishment process may be an attach procedure, or a UE initiated service request procedure, or a location update procedure that needs to establish a bearer.
  • the radio bearer setup request message when the default bearer and the dedicated bearer are established by the radio access bearer setup procedure in the PDN connectivity process that is requested by the UE, the radio bearer setup request message includes both the default bearer information and the dedicated bearer information.
  • the specific information structure is similar to that of Table 4, and will not be described here.
  • the initial context setup request message includes the priority information about the default bearer setup or the special indication information.
  • the bearer identifier or the default bearer may be configured to indicate the priority information or the special indication information.
  • the access node first considers establishing a default bearer; (2) notifying the priority information established by the default bearer or special indication information by using a new notification information.
  • the eNB and the UE determine whether the required default bearer can be established, and if yes, continue the initial context establishment process, and establish a dedicated bearer; otherwise, the establishment of the dedicated bearer does not have to be processed, and a response message is returned, and the response message may include Indicate the reason for establishing the reason for the bearer.
  • the above response message may be a new message, or may be an existing message to which the indication information is added, such as an initial context setup response message or a handover response message or a user PDN connectivity response message.
  • the default bearer is first established. On the premise that the default bearer can be successfully established, the dedicated bearer is considered. If the default bearer cannot be established successfully, the dedicated bearer does not need to be established, and the response message is directly returned. This embodiment avoids the situation that the default bearer is not successfully established and the dedicated bearer has been established, thereby solving the problem of resource waste caused by the situation.
  • the target node distinguishes between the default bearer and the dedicated bearer.
  • the switchover of the dedicated bearer is considered. The specific description is as follows:
  • the source node instructs the target node to first consider the handover of the default bearer, first considering the allocation of resources for the default bearer.
  • the implementation of the handover of the default bearer by the target node may be as follows:
  • a handover request message as a bearer setup request message, where the handover request message includes a default bearer and a dedicated bearer, but may set a specific priority for the default bearer, or Setting special indications/attributes, or other means of doing the same, causes the target node to first determine and/or perform a switch to the default bearer.
  • the target node may directly reject the handover or consider the handover to fail or indicate further behavior of the source node (eg, indicating that the source contact selects a new target side, whether to cancel or terminate the handover process, etc.) And not having to deal with the handover situation of the dedicated bearer, and returning a handover response message as a bearer response message, the handover response message includes indication information indicating the reason why the handover bearer cannot be successfully executed. If the target node determines that the handover can be performed for the default bearer, the target node processes the handover of the dedicated bearer.
  • the target node may give the source node a message and/or information, and the message and/or information may include indication information for indicating the reason for refusing to continue the execution of the handover process. It may also indicate further behavior of the source node (such as retrying the handover procedure, or reselecting a new handover target, such as a new cell, base station or access system; or canceling or terminating the handover procedure, etc.)
  • the source node may also notify the target node of the message and/or information, and/or indicate that the handover process is terminated or cancelled.
  • the source node may also initiate a retry such as retrying the handover procedure, or reselecting a new handover target, such as a new cell, base station, or access system.
  • the switching is performed for the default bearer, and the dedicated bearer is switched on the premise that the default bearer can be successfully performed. If the default bearer fails to perform the handover successfully, the dedicated bearer does not need to be switched, and the source node may be further indicated. Behavior (such as re-selecting a new handover target, such as a new cell, base station or access system; whether to cancel or terminate the handover process, etc.).
  • This embodiment avoids the situation that the default bearer fails to be successfully switched and the dedicated bearer successfully switches, thereby solving the problem of resource waste caused by the situation, and points out that when the target node cannot establish the default bearer, the source contact and/or Or the subsequent behavior of the target node.
  • FIG. 2 is a flowchart of Embodiment 1 of a second bearer processing method according to the present invention, specifically including Next steps:
  • Step 201 Obtain that the default bearer is not successfully established.
  • the manner in which the network node learns that the default bearer is not successfully established may include: obtaining, by receiving, a bearer activation or setup response message, a handover response message, a context setup response message, a PDN connectivity response message, or other indication or notification information. Whether the establishment result of the default bearer or the default bearer can be established.
  • Step 202 Delete the related context.
  • the context related to the PDN connection may be deleted locally. If the last default bearer of the user for the PDN is not successfully established, the non-registered state can also be entered.
  • This embodiment gives the subsequent behavior when it is known that the default bearer has not been successfully established.
  • the UE may enter the non-registered state, which is described as follows:
  • the UE may directly consider that the registration process fails, and may notify the inter-layer to indicate the reason for the reason that the bearer is not established.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • the UE performs the detach process, and the related context can be deleted to enter the non-registered state.
  • the UE performs the detach process and/or deletes the related context, which may be performed locally, that is, the UE performs implicitly locally, and no longer performs signaling interaction with the EPC node; or, the display execution mode interacting with the network may be retrieved.
  • the UE may initiate the detach procedure, and the UE sends an indication to the EPC node that the reason for the bearer is not established.
  • This embodiment shows the subsequent behavior of the UE when it is known that the default bearer has not been successfully established.
  • the third embodiment of the second bearer processing method provided by the present invention is as follows: In the attach procedure or the PDN connectivity procedure requested by the UE or the location update procedure that needs to establish an access bearer, if the default bearer of the UE is not successfully established, the UE may re-initiate the attempt.
  • the specific description is as follows:
  • the UE may re-initiate the default bearer setup request message, where the default bearer setup request message may include indication information for indicating the reason for re-initiating the default bearer setup.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • the default bearer setup request message may be a re-registration request message initiated to the network, or
  • the above request message may be repeatedly initiated one or more times until a preset number of times or time limit is reached, or until the default bearer is successfully re-established, and the process ends.
  • the UE may perform the detach procedure to enter the non-registration state; for the PDN connectivity requested by the UE or the location update scenario where the bearer needs to be established, the UE may delete all the specific PDN connections. Bearer context; if the PDN connection is the last PDN connection of the UE, the UE may initiate a detach procedure.
  • the foregoing UE performs the detach process and/or deletes the related context, which may be performed locally, that is, the UE performs implicitly locally, and no longer performs signaling interaction with the EPC node; or, the interactive display execution mode may be retrieved.
  • the display execution mode is selected, if the PDN connection is deleted, the PDN connection interruption request initiated by the UE may be used; if the user is detached, the detachment procedure initiated by the UE may be used.
  • the UE may send indication information to the eNB and/or the EPC node indicating the reason why the bearer is not established.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • This embodiment shows the subsequent behavior of the UE when it is known that the default bearer has not been successfully established.
  • the fourth embodiment of the second bearer processing method provided by the present invention is as follows:
  • the UE may perform a process of deleting the PDN connection or detaching.
  • the specific description is as follows:
  • a target node receives a handover request message of an EPC node (such as an MME); if the target eNB can establish a context for the UE and has the necessary resources to establish some or all of the required bearers, the handover request response message is fed back to the MME; The handover request response message, the target eNB notifies the MME of the bearer list that can be established and the bearer list that cannot be established.
  • EPC node such as an MME
  • the UE may delete all the bearer contexts of the specific PDN connection, and the specific PDN connection is a PDN connection corresponding to the default bearer that cannot be successfully established, and may notify that the bearer is not established. Indication of cause; If the PDN connection is the last PDN connection of the UE, the UE may initiate a detach procedure.
  • the foregoing UE performs the detach process and/or deletes the related context, which may be performed locally, that is, the UE performs implicitly locally, and no longer performs signaling interaction with the EPC node; or, the interactive display execution mode may be retrieved.
  • the PDN connection is deleted, the PDN connection interruption request initiated by the UE may be used; if the user is detached, the UE-initiated detach procedure may be used.
  • This embodiment shows the subsequent behavior of the UE when it is learned that the default bearer is not successfully established during the handover process.
  • the EPC node When the EPC node (such as the MME) learns that the default bearer is not successfully established, the EPC node can delete all relevant bearer resources and/or contexts of the UE, as follows:
  • the MME receives the indication information sent by the eNB to indicate the reason why the bearer is not established, and knows that the default bearer is not successfully established, the MME may directly consider that the registration process fails.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • the EPC node can delete the UE related context. Specifically, the EPC node performs a detach process And the related context can be performed locally, that is, the MME performs implicitly in the local area, and no longer performs signaling interaction with the UE; or, the display execution mode that interacts with the UE can be retrieved.
  • the display execution mode is used, the MME-initiated detachment process may be used, and the indication information indicating the reason for not establishing the bearer is sent to the eNB, and the eNB forwards the message to the UE.
  • This embodiment shows the subsequent behavior of the EPC node when it is known that the default bearer has not been successfully established.
  • the sixth embodiment of the second bearer processing method provided by the present invention is as follows:
  • the EPC node e.g., MME
  • learns that the default bearer has not been successfully established the EPC node may re-initiate the establishment of the default bearer attempt.
  • the specific description is as follows:
  • the EPC node may re-initiate the default bearer setup request message, where the default bearer setup request message includes indication information indicating that the bearer is not established.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • the EPC node re-initiates the default bearer setup request message, and may use the EPC node to directly re-initiate the default bearer setup request message to the UE and the access network, or may use the EPC node to request the UE to re-execute the default bearer setup. try.
  • the request message may be repeatedly initiated one or more times until a preset number of times or a time limit is reached, or until the default bearer is successfully re-established.
  • the EPC node may perform the detach procedure to enable the UE to enter the non-registration state.
  • the UE and the EPC node may consider the process to be failed, and delete the relevant The bearer context; for the location update scenario where the bearer needs to be established, the UE and the EPC node can delete all bearer contexts of the specific PDN connection; if the PDN connection is the last PDN connection of the UE, the EPC node can initiate the detach procedure.
  • the above EPC node performs the detach process and/or deletes the relevant context, which can be performed locally, ie
  • the EPC node is implicitly executed locally, and no longer performs signaling interaction with the UE; or, it can learn interactive Show execution mode.
  • the PDN connection interruption request initiated by the EPC node may be used; if the user is detached, the EPC-initiated de-attach process may be used.
  • the EPC node may send indication information to the eNB and/or the UE indicating the reason why the bearer is not established.
  • This embodiment shows the subsequent behavior of the EPC node when it is known that the default bearer has not been successfully established.
  • the seventh embodiment of the second bearer processing method provided by the present invention is as follows:
  • the EPC node When the handover process occurs, when the EPC node learns that the target node cannot successfully establish the default bearer, the EPC node can perform the process of deleting the PDN connection or detachment.
  • the specific description is as follows:
  • the target node receives a handover request message of an EPC node (such as an MME); if the eNB can establish a context for the UE and has the necessary resources to establish part or all of the required bearers, the handover request response message is fed back to the MME; The handover request response message, the eNB notifies the MME of the bearer list that can be established and the bearer list that cannot be established.
  • EPC node such as an MME
  • the MME finds that the eNB cannot successfully establish the default bearer, it can delete all the bearer contexts of the specific PDN connection, and the specific PDN connection is the PDN connection corresponding to the default bearer that cannot be successfully established, and notify the indication that the reason for the bearer is not established. Information; If the PDN connection is the last PDN connection of the UE, the MME may initiate a detach procedure.
  • the foregoing EPC node performs the detach process and/or deletes the related context, which may be performed locally, that is, the EPC node performs implicitly locally, and no longer performs signaling interaction with the UE; or, the interactive display execution mode may be retrieved.
  • the PDN connection is deleted, the PDN connection interrupt request initiated by the EPC node may be used; if the user is detached, the detachment process initiated by the EPC node may be used.
  • This embodiment shows the subsequent behavior of the EPC node when the default bearer is not successfully established during the handover process.
  • an attempt to establish a default bearer is re-initiated.
  • the UE may re-initiate the default. The attempt to host the establishment. The specific description is as follows:
  • the UE may re-initiate the default bearer setup request message, where the default bearer setup request message may include indication information for indicating the reason for re-initiating the default bearer setup.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • the default bearer setup request message may be a re-registration request message initiated to the network, or
  • the above request message may be repeatedly initiated one or more times until a preset number of times or time limit is reached, or until the default bearer is successfully re-established, and the process ends.
  • the EPC node may reinitiate the attempt of the default bearer setup.
  • the EPC node may re-initiate the default bearer setup request message, where the default bearer setup request message includes indication information indicating that the bearer is not established.
  • the indication information may be: the access layer does not establish the indication information of the user plane resource corresponding to the default bearer, or the UE does not receive the indication information of the non-access stratum establishing the default bearer indication/request message, or the non-access stratum Failed to accept the instructions to establish a default bearer request.
  • the EPC node re-initiates the default bearer setup request message, and may use the EPC node to directly re-initiate the default bearer setup request message to the UE and the access network, or may use the EPC node to request the UE to re-execute the default bearer setup. try.
  • the above request message may be repeatedly initiated one or more times until a preset number of times or a time limit is reached. Or until the default bearer is successfully re-established.
  • FIG. 3 is a flowchart of a method for processing a fourth type of bearer according to the present invention. As shown in FIG. 3, the embodiment specifically includes the following steps:
  • Step 301 During the execution of the handover process, it is learned that the default bearer is not successfully established; Step 302: Refusing to continue the handover process.
  • the UE and/or the EPC node may reject the handover. Specifically, when the UE needs to change the network node it serves due to mobility or other reasons, a handover procedure occurs, and if the UE and/or the EPC node learns that the target node cannot successfully establish the default bearer, the UE and/or the EPC node This switch can be rejected.
  • This example uses the S1 switch in the same access system as an example.
  • the details are as follows:
  • the target node receives a handover request message of an EPC node (such as an MME); if the eNB can establish a context for the UE and has the necessary resources to establish part or all of the required bearers, the handover request response message is fed back to the MME; The handover request response message, the eNB notifies the MME of the bearer list that can be established and the bearer list that cannot be established.
  • EPC node such as an MME
  • the refusal to continue the handover procedure is refused.
  • the refusal may be determined by the UE and/or the EPC node, and may carry a specific indication or a cause value.
  • the target eNB sends a handover failure message to the MME, where the handover failure message includes indication information indicating that the reason for the bearer is not established. .
  • the target node may send an indication message and/or information to the source node, where the indication message and/or information may include a description for indicating that the handover fails or refuses to continue to execute the handover procedure. Instructions for the reason.
  • the target node may also indicate subsequent behavior of the source node (such as retrying the handover procedure, or reselecting a new handover target, such as a new cell, base station, or access system; or canceling or terminating the handover process, etc.)
  • the source node can also give the target node.
  • An indication message and/or information is sent for notification and/or indicating that the handover process is terminated or cancelled.
  • the source node may also initiate a retry, such as retrying the handover procedure, or reselecting a new handover target, which may be a new cell, base station, or access system, and the like.
  • the indication information of the foregoing follow-up behavior may include setting the rejection reason as "the target side cannot establish the default bearer" or other similar reason/indication, or the UE and/or the EPC suggesting or deciding to re-select an access target or initiate a retry, etc. .
  • the solution described in this embodiment is also applicable when a handover across a access system occurs.
  • This embodiment shows the subsequent behavior of the UE or EPC node when it is learned that the default bearer is not successfully established during the handover process.
  • FIG. 4 is a flowchart of an embodiment of a fifth bearer processing method provided by the present invention, which specifically includes the following steps:
  • Step 401 During the X2 handover process, if the source RAN node (such as the source eNB) receives the request to perform the S1 interface process, the source RAN node may decide to terminate the handover process, and may send a handover cancellation/indication message to the destination RAN node. ;
  • the source RAN node such as the source eNB
  • the S1 interface process may be a bearer process flow, or a paging process, or a non-access stratum information transmission process, a location report process, or a context management process, etc.
  • the bearer management process may be to establish a bearer process or modify a bearer process, etc.; / indicates that the message may contain the reason value for canceling the switch;
  • Step 402 The RAN node terminates the handover process according to the handover cancel/instruction message.
  • Step 403 The source RAN node performs an S1 interface process.
  • the embodiment may further include: the source RAN node re-initiating the handover process.
  • This embodiment provides a scheme for terminating the handover process and executing the S1 interface process when the source RAN node receives the request for executing the S1 interface process in the X2 handover process. This embodiment avoids unnecessary operations and improves The performance and efficiency of the system.
  • the sixth embodiment of the sixth bearer processing method provided by the present invention :
  • FIG. 5 is a flowchart of Embodiment 1 of a sixth bearer processing method according to the present invention, which specifically includes the following steps:
  • Step 501 During the handover process, if the source RAN node receives the request that the core network node needs to perform the S1 interface process, the source RAN node sends an S1 interface processing reject response/indication message to the core network node.
  • the S1 interface process may be a bearer process flow, or a paging process, or a non-access stratum information transmission process, a location report process, or a context management process.
  • the S1 interface process is a bearer process
  • the S1 interface processes the reject response/
  • the indication message contains a reason value for rejecting the bearer processing
  • Step 502 The core network node processes the reject response/notification/instruction message according to the S1 interface, and suspends the S1 interface process.
  • Step 503 The source RAN node continues to perform the handover process.
  • Step 504 When the handover fails, the S1 interface process is performed; when the handover succeeds, the S1 interface process is processed according to the handover result.
  • This embodiment provides a solution for processing the S1 interface process according to the switching result, avoiding unnecessary operations, and improving system performance and efficiency.
  • the solution in this embodiment is applicable not only to the bearer processing process, but also to other S1 interface processes, such as paging, NAS information transmission, location reporting, context management, etc., that is, When the handover occurs, if the source eNB receives the request to perform these processes, the source eNB may also use the suspend handover process to execute the S1 interface processing procedure. This embodiment avoids unnecessary operations and improves the system. Performance and efficiency.
  • the X2 handover process is taken as an example. If the source RAN node (such as the source eNB) receives an instruction/request of the UE-specific process (for example, the bearer management process), the core network node (such as the source eNB) may reject the immediate request. Execute the instruction/request.
  • the source RAN node such as the source eNB
  • the core network node such as the source eNB
  • the bearer management process may be to establish a bearer process or modify a bearer process, and the source eNB may suspend the bearer process and continue to perform the handover process.
  • the reason that the source eNB can notify the MME that the bearer processing procedure is suspended is because the UE is performing handover.
  • the MME may directly re-execute the bearer processing procedure; when the handover succeeds, the MME re-determines whether the bearer processing procedure needs to be re-attended according to the handover result; if yes, re-executes the bearer processing procedure previously described; otherwise, cancels Or terminate the bearer processing procedure described previously.
  • the foregoing re-determining whether the bearer processing procedure needs to be re-attempt according to the handover result may be specifically as follows: when the bearer switching of the bearer management to be performed by the bearer processing flow is successful, the bearer processing flow is executed, that is, when the network node originally intends to perform bearer management or If some bearers are successfully switched during the handover process, the bearer processing procedure described above is re-executed; when the bearer handover of the bearer management to be performed in the bearer processing procedure fails, the bearer processing flow is cancelled or terminated, that is, when the network node is original If one or some of the bearers that intend to perform bearer management fails to perform the handover successfully during the handover process, the bearer processing procedure described previously is cancelled or terminated.
  • the bearer processing flow is suspended, and the handover process is continued; and the handover success is determined according to the success of the handover and the successful handover result. Whether the bearer processing procedure is performed; this embodiment avoids unnecessary operations of the MME to process the bearers due to the release of some bearers in the handover process, saves resources, and improves system performance and efficiency.
  • the solution in this embodiment is applicable not only to the bearer processing process, but also to other S1 interface processes, such as paging, NAS information transmission, location reporting, context management, etc., that is, When a handover occurs, if the source eNB receives a request to perform these processes, the source eNB may also use the suspend handover procedure to execute the scheme of the S1 interface processing procedure.
  • This embodiment takes LTE internal handover or cross-system handover as an example, if an EPC node (such as SGW,
  • PGW PGW
  • the source RAN node (such as the source eNB) prepares or performs LTE internal handover or cross-system handover for the UE, although the source RAN node and some EPC nodes (such as MME) participate in the handover process, other EPC nodes (such as SGW, PGW) And HSS, etc.) may still not know that the UE is performing the handover for a period of time.
  • the source eNB and the MME are performing the S1 handover or the cross-system handover procedure for the UE, if other EPC nodes (such as the SGW, PGW) need/request the MME and/or the eNB to perform the bearer management process for the UE, the bearer management process may be established. The bearer process or the modification of the bearer process, etc., at this time, the bearer process flow can be suspended.
  • the reason that the source eNB can notify other EPC nodes that the bearer processing procedure is suspended is because the UE is performing handover. When other EPC nodes receive the notification of suspending the bearer processing flow, they will wait for the handover to complete. When the handover fails, the other EPC nodes can directly re-execute the bearer processing flow; when the handover succeeds, the other EPC nodes re-determine whether the bearer processing flow needs to be re-attempt according to the handover result; if yes, re-execute the bearer processing procedure described previously Otherwise, cancel or terminate the bearer processing procedure described previously.
  • the foregoing re-determining whether the bearer processing procedure needs to be re-attended according to the handover result may be specifically as follows: When the bearer switching of the bearer management to be performed by the bearer processing flow is successful, the bearer processing flow is executed, that is, when other EPC nodes originally intend to perform bearer management If some bearers are successfully switched during the handover process, the bearer processing procedure described above is re-executed; when the bearer handover of the bearer management to be performed in the bearer processing procedure fails, the bearer processing flow is canceled or terminated, that is, when other EPCs are If one or some of the bearers that the node originally intended to perform bearer management fails to perform the handover during the handover process, the bearer processing procedure described previously is cancelled or terminated.
  • the EPC node such as the SGW, PGW
  • the MME and/or the eNB to perform the bearer management process for the UE
  • the bearer processing flow is suspended, and the handover is continued. And determining whether to perform the bearer processing procedure according to whether the handover is successful and the result of the handover success; this embodiment avoids that some bearers have been used in the handover process. Released and the MME also handles unnecessary operations of these bearers, saving resources and improving system performance and efficiency.
  • the solution in this embodiment is applicable not only to the bearer processing process, but also to other S1 interface processes, such as paging, NAS information transmission, location reporting, context management, etc., that is, When a handover occurs, if the source eNB receives a request to perform these processes, the source eNB may also use the suspend handover procedure to execute the scheme of the S1 interface processing procedure.
  • the EPC node and the eNB separately process EMM information (such as an attach accept message) and ESM information (bearer related message).
  • EMM information such as an attach accept message
  • ESM information bearer related message
  • the EPC node (such as the MME) is attached to the NAS layer attachment accept message sent by the eNB to the UE, and may not be bound to the NAS layer bearer information (ESM message container) required to establish the bearer. of.
  • the specific bearer indication may continue to be bound to the specific NAS information, but the bound NAS information is only the ESM-related NAS content, and no longer includes the EMM information (such as an attach accept message).
  • the bound NAS information is only the ESM-related NAS content, and no longer includes the EMM information (such as an attach accept message).
  • Table 5 a request message structure is established for the initial context of this embodiment, and only information related to the present embodiment is shown in the message.
  • the NAS information related to the EMM may be used as an independent information unit in the initial context setup request message, and may be delivered to the UE through the eNB, or may be delivered to the UE through the eNB through the downlink NAS transmission message.
  • the eNB transmits the NAS information element including the EMM information to the UE regardless of whether the eNB can successfully establish the default bearer. That is to say, the eNB always delivers EMM-related NAS information to the UE.
  • the EPC node may send the EMM-related NAS information to the UE through the eNB through a separate message.
  • the ESM information in the initial context setup request message is not bound to the EMM information, and the eNB transmits the NAS information element including the EMM information to the UE, regardless of whether the eNB can successfully establish the default bearer, and avoids that the eNB cannot be established. In some bearers, the EMM information bound to these bearers cannot be delivered to the UE.
  • FIG. 6 is a schematic structural diagram of an embodiment of a first type of bearer processing apparatus according to the present invention.
  • the embodiment includes: a judging module 11, a bearer establishing module 12, and a response module 13, wherein the judging module 11 receives according to The bearer setup request message is sent to determine whether the default bearer can be established.
  • the bearer setup module 12 establishes a default bearer, and establishes a dedicated bearer after establishing the default bearer; or The default bearer and the dedicated bearer are set up at the same time.
  • the response module 13 returns a response message, where the response message includes indication information indicating that the reason for the bearer is not established.
  • a default bearer is first established, and a dedicated bearer is established on the premise that the default bearer can be successfully established. If the default bearer cannot be established successfully, the dedicated bearer does not need to be established, and the response message is directly returned.
  • This embodiment avoids the situation that the default bearer is not successfully established and the dedicated bearer has been established, thereby solving the problem of resource waste caused by the situation.
  • FIG. 7 is a schematic structural diagram of an embodiment of a second type of bearer processing apparatus according to the present invention. As shown in FIG. 7, the embodiment includes: a learning module 21 and a deleting module 22, wherein the learning module 21 learns the default. The bearer is not successfully established; when the learning module 21 learns that the default bearer has not been successfully established, the deleting module 22 deletes the relevant context.
  • the embodiment may further include an initiating module 23, when the learning module 21 learns that the default bearer is not successfully established, the initiating module 23 re-initiates a default bearer setup request message, where the default bearer setup request message is included Indicates the indication of the reason for re-initiating the default bearer establishment.
  • This embodiment may also include a detachment module 24 that performs a detach process.
  • the deleting module 22 may be specifically configured to: when the default bearer of the PDN connection is not successfully established, delete the context related to the PDN connection; if the last default bearer of the UE for the PDN connection is not successfully established, the detaching module 24 performs De-attach process.
  • the embodiment may further include a sending module 25, when the detach process is executed in the display execution mode and/or the related context is deleted, the sending module 25 sends the indication information for explaining the reason why the bearer is not established.
  • This embodiment gives the subsequent behavior when it is known that the default bearer has not been successfully established.
  • FIG. 8 is a schematic structural diagram of a third embodiment of a bearer processing apparatus according to the present invention. As shown in FIG. 8, the embodiment includes: a learning module 31 and an execution module 32, wherein the learning module 31 learns that the default bearer is not successfully established. When the learning module 31 learns that the default bearer has not been successfully established, the execution module 32 reinitiates an attempt to establish a default bearer.
  • This embodiment gives the subsequent behavior when it is known that the default bearer has not been successfully established.
  • FIG. 9 is a schematic structural diagram of a fourth embodiment of a bearer processing apparatus according to the present invention.
  • the embodiment includes: a learning module 41 and a rejecting module 42, wherein the learning module 41 learns that the default bearer is not successfully established.
  • the reject module 42 refuses to continue the handover process.
  • This embodiment shows the subsequent behavior of the UE or EPC node when the default bearer is not successfully established during the handover process.
  • FIG. 10 is a schematic structural diagram of a fifth embodiment of a bearer processing apparatus according to the present invention, as shown in FIG. 10
  • the embodiment includes: a sending module 51 and an executing module 52, wherein, in the X2 switching process, if the source RAN node receives a request to perform an S1 interface process, the sending module 51 sends a handover cancellation to the destination RAN node.
  • the embodiment may further include an initiating module 53.
  • the executing module 52 executes the S1 interface process
  • the initiating module 53 re-initiates the handover process.
  • This embodiment provides a solution for terminating the handover process and performing the bearer process flow when the source RAN node receives the request to perform the bearer process flow in the X2 handover process. This embodiment avoids unnecessary operations and improves The performance and efficiency of the system.
  • FIG. 11 is a schematic structural diagram of a sixth embodiment of a bearer processing apparatus according to the present invention.
  • the embodiment includes: a sending module 61, an executing module 62, and a processing module 63, wherein, during the switching process, The source RAN node receives the request that the core network node needs to perform the S1 interface process, and the sending module 61 sends the S1 interface processing reject response/indication message to the core network node; after the core network node suspends the S1 interface process, the execution module 62 continues to perform the handover process.
  • the processing module 63 executes the S1 interface process when the handover fails; when the handover succeeds, the S1 interface process is processed according to the handover result.
  • the S1 interface process is specifically a bearer processing process.
  • the processing module 63 performs a bearer processing flow; when the handover is successful and the bearer processing process is to perform the bearer management bearer When the handover fails, the processing module 63 cancels or terminates the bearer processing flow.
  • This embodiment provides a solution for processing a bearer processing flow according to a handover result, avoiding unnecessary operations, and improving system performance and efficiency.
  • the present invention further provides an embodiment of an attachment apparatus, the embodiment comprising: a sending module, configured to send an initial context setup request message; the EPS session management information in the initial context setup request message is not bound to the EPS mobility management information .
  • the ESM information in the initial context setup request message is not bound to the EMM information, and the eNB will include the NAS information list of the EMM information whether the eNB can successfully establish the default bearer.
  • the UE is delivered to the UE, and the EMM information bound to the bearers cannot be delivered to the UE when the eNB cannot establish certain bearers.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. It is not limited thereto; although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or some of the technologies. The features are equivalent to the equivalents of the technical solutions of the embodiments of the embodiments of the present invention.

Description

承载处理方法、 装置及附着方法、 装置
技术领域
本发明实施例涉及网络领域, 尤其涉及一种承载处理方法、 装置及附着 方法、 装置。 背景技术
目前,在第三代合作伙伴计划( 3GPP )中,长期演进( Long Term Evolved, 以下简称: LTE ) 网络 /系统架构演进( System Architecture Evolved, 以下简 称: SAE ) 网络成为一个重要的研究课题。 其中, LTE 旨在提供一种能降低 时延、 提高用户数据速率、 改进系统容量和低成本覆盖的网络, 其使用分组 ( PS )域业务, 承载网络为因特网协议( Internet Protocol , 以下简称: IP ) 承载。
由现有技术可知,在 LTE/SAE网络中,一条或多条激活专用承载消息能 够与附着流程中的附着接受消息或者用户请求的分组数据网络(Packet Data Network, 以下简称: PDN )连通性流程的 PDN连通接受消息联接在一起, 通过 LTE/SAE网络中的 S1-MME接口和空口分别下发给演进网络基站( eNB ) 和用户设备( User Equipment , 以下简称: UE ) 。
在对现有技术的研究和实践过程中, 本发明的发明人发现现有技术存 在以下问题:
当演进全球陆地无线接入网 ( Evolved Universal Terrestrial Radio Access Network, 以下简称: E-UTRAN ) 节点 (如 eNB )无法成功建立缺 省承载时, 由于演进数据核心网络( Evolved Packet Core Network , 以下简 称: EPC )节点(如移动性管理实体( Mobility Management Entity , 以下简称: ΜΜΕ ) )发起的专用承载去激活流程只适用于释放专用承载, 而不适用于释 放缺省承载, 因此不能釆用该流程释放相应缺省承载的信息和资源, 并且, 现有技术没有规定这种情况下 UE和 EPC的处理行为。
当在 eNB为 UE执行 X2或 S1切换过程中, EPC节点需要 /请求 eNB为 UE执行新的承载处理流程时,可能引发资源浪费的问题或者不同设备之间的 互操作性问题, 影响了系统的性能。 发明内容
本发明实施例提供了一种承载处理方法、 装置及附着方法、 装置。
本发明实施例提供的第一种承载处理方法, 包括:
根据接收到的承载建立请求消息, 判断是否能够建立缺省承载; 若是, 则在建立缺省承载后, 建立专用承载; 或者, 同时建立缺省承载 与专用承载;
否则, 返回响应消息; 所述响应消息中可以包含用于说明没有建立承载 的原因的指示信息。
本发明实施例提供的第二种承载处理方法, 包括:
当获知缺省承载没有成功建立时, 删除相关上下文。
本发明实施例提供的第三种承载处理方法, 包括:
当获知缺省承载没有成功建立时, 重新发起缺省承载建立的尝试。
本发明实施例提供的第四种承载处理方法, 包括:
在切换流程执行过程中, 当获知缺省承载没有成功建立时, 拒绝继续执 行所述切换流程。
本发明实施例提供的第五种承载处理方法, 包括:
在 X2切换过程中, 若源无线接入网络 RAN节点接收到需要执行 S1接 口流程的请求, 则源 RAN节点向目的 RAN节点发送切换取消 /指示消息; 目的 RAN节点根据所述切换取消 /指示消息, 终止所述切换过程; 源 RAN节点执行所述 S 1接口流程。 本发明实施例提供的第六种承载处理方法, 包括:
在切换过程中,若源无线接入网络 RAN节点接收到核心网络节点需要执 行 S 1接口流程的请求, 则源 RAN节点向核心网络节点发送 S 1接口处理拒 绝响应 /指示消息;
所述核心网络节点根据所述 S1接口处理拒绝响应 /指示消息, 暂停所述
S1接口流程;
源 RAN节点继续执行所述切换过程;
当切换失败时, 执行所述 S1接口流程; 当切换成功时, 根据切换结果处 理所述 S1接口流程。
本发明实施例提供的附着方法, 包括:
在附着流程中, 网络节点向基站发送初始上下文建立请求消息; 所述初 始上下文建立请求消息中演进分组系统 EPS会话管理信息不与 EPS移动性管 理信息进行绑定。
本发明实施例提供的第一种承载处理装置, 包括:
判断模块, 用于根据接收到的承载建立请求消息, 判断是否能够建立缺 省承载;
承载建立模块, 用于当判断出能够建立缺省承载时, 建立缺省承载; 并 在建立缺省承载后, 建立专用承载; 或者, 同时建立缺省承载与专用承载; 响应模块, 用于当判断出不能建立缺省承载时, 返回响应消息; 所述响 应消息中包含用于说明没有建立承载的原因的指示信息。
本发明实施例提供的第二种承载处理装置, 包括:
获知模块, 用于获知缺省承载没有成功建立;
删除模块, 用于当获知缺省承载没有成功建立时, 删除相关上下文。 本发明实施例提供的第三种承载处理装置, 包括:
获知模块, 用于获知缺省承载没有成功建立;
执行模块, 用于当获知缺省承载没有成功建立时, 重新发起缺省承载建 立的尝试。
本发明实施例提供的第四种承载处理装置, 包括:
获知模块, 用于获知缺省承载没有成功建立;
拒绝模块, 用于在切换流程执行过程中, 当获知缺省承载没有成功建立 时, 拒绝继续执行所述切换流程。
本发明实施例提供的第五种承载处理装置, 包括:
发送模块, 用于在 X2切换过程中, 若源无线接入网络 RAN节点接收到 需要执行 S1接口流程的请求, 则向目的 RAN节点发送切换取消 /指示消息; 执行模块, 用于在所述目的 RAN 节点终止所述切换过程后, 执行所述 S1接口流程。
本发明实施例提供的第六种承载处理装置, 包括:
发送模块, 用于在切换过程中,若源无线接入网络 RAN节点接收到核心 网络节点需要执行 S1接口流程的请求, 则向核心网络节点发送 S1接口处理 拒绝响应 /指示消息;
执行模块, 用于在所述核心网络节点暂停所述 S1接口流程后, 继续执行 所述切换过程;
处理模块, 用于当切换失败时, 执行所述 S1接口流程; 当切换成功时, 根据切换结果处理所述 S1接口流程。
本发明实施例提供的附着装置, 包括:
发送模块, 用于发送初始上下文建立请求消息; 所述初始上下文建立请 求消息中演进分组系统 EPS会话管理信息不与 EPS移动性管理信息进行绑定。
本发明实施例在缺省承载没有成功建立时, 规定了 UE或网络节点的处理 行为。 附图说明
图 1为本发明提供的第一种承载处理方法实施例一的流程图; 图 2为本发明提供的第二种承载处理方法实施例一的流程图; 图 3为本发明提供的第四种承载处理方法实施例的流程图;
图 4为本发明提供的第五种承载处理方法实施例的流程图;
图 5为本发明提供的第六种承载处理方法实施例一的流程图; 图 6为本发明提供的第一种承载处理装置实施例的结构示意图; 图 7为本发明提供的第二种承载处理装置实施例的结构示意图; 图 8为本发明提供的第三种承载处理装置实施例的结构示意图; 图 9为本发明提供的第四种承载处理装置实施例的结构示意图; 图 10为本发明提供的第五种承载处理装置实施例的结构示意图; 图 11为本发明提供的第六种承载处理装置实施例的结构示意图。 具体实施方式
在 LTE/SAE网络中, 为了实现"永远在线"的 IP连接, 目前确定的方 案是: 当 UE通过 E-UTRAN附着到网络或者用户激活一个新的 PDN连接 (如用户请求 PDN连通性)时,网络给 UE分配一个分组数据协议( Packet Data Protocol, 以下简称: PDP )地址(即 PDN地址, 通常为 IP地址, 本 文均以 IP地址为例进行描述;),并建立一个缺省承载上下文( Default Bearer Context ) ; 当然, UE和 /或网络还可以建立针对该 PDN连接的其他 载 (称之为专有承载) 上下文。 但是, 在 LTE/SAE 网络中, 一旦用户附着 到一个网络或接入一个 PDN, 在整个连接期间, UE和 EPC 必须为这个 PDN连接建立至少一个承载(即缺省承载 ) 。 一个 UE可以同时接入多个 PDN, 一个用户针对每个 PDN可以建立多个 PDN连接, 一个用户针对每 个 PDN连接必须有且仅有一个缺省承载, 一个用户针对每个 PDN连接还 可以同时有零个、一个或多个专用承载。 当 UE某个 PDN连接的缺省承载 资源被释放, 会导致 UE的该 PDN连接被释放; 如果 UE的所有 PDN连 接对应的缺省承载都被释放, UE会变成非注册 (Detach)状态, 也就是与网 络分离开了。此外,对于一个用户而言,每个承载都有一个唯一的标识(该 标识为承载标识) , 且 UE和 EPC节点能够区分出缺省承载和专用承载, 而 E-UTRAN无法区分出缺省承载和专用承载。
除了用户附着流程外,在用户请求的 PDN连通性流程中, 网络也会为用 户建立到特定 PDN连接的缺省承载。 此外, 在用户附着和建立缺省承载过程 中, 网络还可以同时发起专用承载的建立 (或称为专用承载激活) , 也就是 说, 在用户附着流程或者用户请求的 PDN连通性流程中, 网络可以同时发起 专用承载激活, 这样使得缺省承载和专用承载一起建立 /激活。 而且, 由于承 载信息在 UE、 无线接入网和核心网之间的体现有所不同, 例如: 无线接入网 只体现接入层承载信息, 而 UE和核心网还可以体现非接入层承载信息, 因 此, 对于核心网节点(如 MME )而言, 只有接收到 eNB反馈的接入层( AS ) 承载和 UE反馈的非接入层(NAS )承载都成功建立的消息后, MME才会认 为该 7 载建立成功。
现有技术存在上述问题的主要原因如下:
现有技术一:
对于 S 1 -MME接口处理时建立承载相应的消息流程 ,在附着时是通过初 始上下文建立流程来完成的。 其中, 初始上下文建立请求消息中包含了核心 网节点(如 MME )希望无线接入网(如 eNB )建立的承载列表( E-RAB to Be Setup List )及其所需的 QoS和相关的传输承载信息等参数。 如表 1所示, 为 这种承载列表的消息结构, 表 1中仅示出了与本发明相关的信息。
表 1. 初始上下文建立请求消息
Figure imgf000008_0001
»Transport Layer Address 传输承载信息 ( IP路由信息)
» GTP TEID 传输承载信息 (GTP路由信息)
» NAS-PDU 与特定承载相关的 NAS信息,该特定承
载为承载标识对应的承载 其中, NAS信息是 EPC节点与 UE之间交互的信息, 与对应的承载标 识( E-RAB ID )——对应绑定。 eNB在 UE和 EPC节点之间透明传输 NAS 信息, 而不解析该信息。
eNB接收到该初始上下文建立请求消息后, 如果能够为 UE建立上下文 并有必要资源用于建立部分或全部所需承载, 则 eNB会在空中接口通过 AS 层的无线资源控制( Radio Resource Control , 以下简称: RRC )连接重配置流 程, 继续为 UE建立对应的 AS层数据无线承载。 此时, eNB会将能够建立的 承载对应的 NAS信息也通过上述 RRC连接重配置流程传递给 UE, UE的 AS 层接收到 NAS信息后, 会转发给 UE的 NAS层, 由 UE的 NAS层完成 NAS 层承载信息的激活, 并将 NAS层承载激活等信息经过 eNB透传给 MME。 而 当 eNB不能建立某些承载时, 与这些承载所对应的 NAS信息就不会经 eNB 传递给 UE, 因此, UE的 NAS层也不会激活对应的 NAS层承载信息。
此外, 对于 NAS信息还有如下规定: 在附着时, MME经过 eNB发给 UE的 NAS层附着接受消息中,同时包含着建立缺省承载所需要的 NAS层承 载信息, 也就是说缺省承载对应的 NAS信息与附着接受消息对应的 NAS信 息是绑定在一起的, 如表 2所示, 为附着接受消息结构, 表 2中仅示出了与 本发明相关的信息。
表 2. 附着接受消息结构
信息单元 信息单元说明
Attach accept message identity 消息类型
EPS attach result 附着结果
ESM message container 会话管理消息容器(包含缺省承载建立信息) 上述消息结构实质上意味着, 在一个演进分组系统 ( Evolved Packet System, 以下简称: EPS )移动性管理( EPS Mobility Management, 以下简称: EMM ) 消息 (Attach Accept ) 中包含着一个 EPS 会话管理 (EPS Session Management, 以下简称: ESM ) 消息 ( ESM message container ) , 二者互相 绑定在一起。
待 eNB与 UE成功完成 RRC连接重配置流程之后, eNB会通过初始上 下文建立响应消息向 MME反馈 AS层承载建立情况,包括建立成功的承载列 表(E-RAB Setup List )和可能没有建立的承载列表 ( E-RAB Failed to Setup List ) 。 UE的 NAS层也会相应的向 MME反馈 NAS层承载信息的建立情况。 对于成功建立 (包括接入层和非接入层都成功建立) 的承载, 核心网节点会 继续完成核心网侧的承载建立过程。 对于没有建立起来的承载 (包括接入层 和 /或非接入层没能建立) , 核心网侧会通过 MME发起的专用承载去激活流 程释放相应承载的信息和资源, 同时, 这一流程只适用于释放专用承载, 而 不适用于释放缺省承载。
当 eNB不能建立某些承载时, eNB不会将与这些承载所对应的非接入层
( Non- Access Stratum, 以下简称: NAS )信息传递给 UE。 例如, 当 eNB无 法成功建立缺省承载时, 与缺省承载对应的 NAS信息不能传递给 UE , 也就 是说, 与缺省承载绑定的附着接受 NAS信息 (如 Attach Accept消息 )也不 会传递给 UE,而其他成功建立的专用承载所对应的 NAS信息将会传递给 UE。 此时, UE能够接收到与专用承载建立相关的 NAS信息 (并建立 NAS层承载 信息), 但接收不到与缺省承载相关的 NAS信息(也就无法建立缺省承载信 息)以及附着接受的 EMM信息, UE没有收到附着接受消息, 则无法完成到 网络的注册过程。 这就意味着, ESM因素 (承载建立)影响到 EMM的处理 (附着过程) , 从逻辑上而言, 这是不合适的。 并且, 现有技术也没有规定 UE的后续行为。
同样, 当 EPC节点 (如 MME )接收到从 E-UTRAN节点 (如 eNB )发 送的 AS 承载建立情况时, 该承载建立情况包括建立成功的承载列表(如 E-RAB Setup List )和没有建立的承载列表(如 E-RAB Failed to Setup List ) , 若发现没有成功建立缺省承载, 由于 ΜΜΕ发起的专用承载去激活流程只适 用于释放专用承载, 而不适用于释放缺省承载, 因此釆用该流程释放相应承 载的信息和资源已经不合适, 并且, 现有技术没有规定 EPC的处理行为。
现有技术二:
当用户由于移动或其他原因, 需要改变其服务的网络节点时, 会发生切 换过程。 切换按照场景分类, 可以分为同一接入系统内部的切换(如 LTE接 入系统内部的 Χ2切换、 S 1切换)和不同系统间切换(如 2G/3G与 LTE系统 间的切换)。 为了简明起见, 本发明实施例以 LTE系统内部的切换为例进行 介绍, 但本发明的方法不限于 LTE系统内部, 而是可以应用于跨系统切换的 场景。
在进行 S 1切换时, 目标无线接入网络( Radio Access Network , 以下简 称: RAN )节点(如 eNB )接收到 EPC节点(如 MME )的切换请求消息后, 判断是否能够接受, 如果能够为 UE建立上下文并有必要资源来建立部分或 全部所需承载, 则 eNB会在通过切换请求应答消息反馈给 MME。此时, eNB 会将能够建立的承载列表以及不能建立的承载列表都告知 MME,包括建立成 功的承载列表( E-RABs Admitted List )和可能没有建立的承载列表 ( E-RAB Failed to Setup List ) 。 对于目标 eNB成功建立的承载, 核心网节点会继续完 成切换过程。 对于目标 eNB没有建立起来的承载, 核心网侧会通过 MME发 起的专用承载去激活流程释放相应承载的信息和资源 (注意: 这一流程只适 用于释放专用承载, 而不适用于释放缺省承载), UE也会本地自行删除相关 资源。
在进行 X2切换时 , 目标 RAN节点 (如目标 eNB )接收到源 RAN节点 (如源 eNB ) 的切换请求消息后, 判断是否能够接受, 如果能够为 UE建立 上下文并有必要资源来建立部分或全部所需承载, 则目标 eNB会在通过切换 请求应答消息反馈给源 eNB。 此后 , 目标 eNB可以通过通道转换消息流程将 能够建立的承载列表告知 EPC节点 (如 MME ) , 该承载列表包括建立成功 的承载列表。 对于目标 eNB成功建立的承载, 核心网节点会继续完成切换过 程。 对于目标 eNB没有建立起来的承载, 核心网侧会通过 MME发起的专用 承载去激活流程释放相应承载的信息和资源 (注意: 这一流程只适用于释放 专用承载, 而不适用于释放缺省承载) 。 同样, 源 eNB也会通过空口消息通 知 UE 目标侧建立成功的承载和需要释放的承载, 也会本地自行删除相关资 源。 对于目标 eNB建立成功的承载, UE随后会切换到目标 eNB, 而对于目 标 eNB没有建立起来的承载, 也会自行释放相应承载的信息和资源。
如前所述, 当目标侧(如目标 eNB )不能接纳 /建立某个或某些专用承载 时, 这个或这些专用承载会被释放掉。但是, 当 EPC节点发现目标 eNB出于 种种原因无法成功建立缺省承载时, 再釆用 MME发起的专用承载去激活流 程释放相应承载的信息和资源已经不合适(因为该流程只适用于释放专用承 载, 而不适用于释放缺省承载) , 并且 UE和 EPC的处理行为也没有规定。
现有技术三:
当已经接入一个 PDN的用户, 如果同时需要接入另外一个 PDN时, 可 以通过用户请求的 PDN连通性流程来接入新的 PDN, 在此过程中, 可以同 时建立缺省承载和专用承载。
在用户请求的 PDN连通性流程中 , 当 UE或网络(如 eNB )出于种种原 因无法成功建立缺省承载时, UE和 EPC节点的处理行为也没有规定。
现有技术四:
当已经附着到网络用户, 在发生位置更新流程时, 如果用户或者网络认 为有必要同时建立起接入层承载时, 可以在位置更新流程时同时建立缺省承 载和专用承载。
在执行承载建立的位置更新流程中, 当 UE或网络(如 eNB ) 出于种种 原因无法成功建立缺省承载时, UE和 EPC的处理行为也没有规定。 现有技术五:
由于 RAN节点(如 eNB )为 UE发起 X2切换不需要 EPC节点(如 MME ) 参与, EPC节点在一段时间内可能不知道 UE正在执行 X2切换。 当 eNB为 UE执行 X2切换过程时,若 EPC节点需要 /请求 eNB为 UE执行新的 S1-MME 接口流程 (如建立或修改承载、 透传 UE的 NAS信息等 )时, eNB可以拒绝 MME的请求,并告知 MME拒绝原因是由于 UE在执行切换。 MME收到 eNB 的拒绝指示后, 会等待切换成功完成或切换失败后, 重新尝试此前所述的 S1-MME接口流程。
此外, 当 RAN节点(如 eNB )为 UE发起 LTE内部的 S1切换或者跨系 统切换的切换准备阶段时,此时,若 EPC节点(如 MME和 /或服务网关( Serving Gateway, 以下简称: SGW )和 /或分组数据网络网关 ( PDN Gateway, 以下 简称: PGW ) )需要 /请求源 eNB为 UE执行新的承载处理流程 (如建立或修 改承载等)时, 源 eNB可以釆取以下两种处理方式: 取消正在进行的切换流 程, 并执行承载处理流程; 或者,终止承载处理流程, 并继续执行切换流程。 . 在 eNB为 UE执行 X2切换时, 在切换成功执行(部分承载切换成功或 全部承载切换成功) 的情况下, 如果只有部分承载切换成功, 那么那些没有 切换成功的承载会被 UE和网络释放, 这意味着切换结束后, UE的承载信息 很可能已经发生了改变, 如: 有的承载已经删除了。 而此时, 如果 MME在 切换成功完成后, 继续重新尝试此前所述的 S 1 -MME接口流程 (如承载修改 流程), 则有可能变得没有意义, 因为该承载有可能已经删除了, 因而 MME 不必再重新尝试了。 所以, 当前的技术方案可能系统导致不必要的操作和资 源消耗, 影响系统性能和效率。
同时, 当 RAN节点 (以 eNB为例, 下同)为 UE发起 LTE内部的 S1 切换(准备和执行)或者跨系统切换的切换准备阶段时, 此时, 若 EPC (如 MME和 /或 SGW和 /或 PGW )节点需要 /请求源 eNB为 UE执行新的承载处 理流程(如建立或修改承载, 等等) 时, 此时, 源 eNB虽然可以釆取上述两 种处理方式之一, 但具体釆用哪一种方式取决于各个设备的实现, 这将有可 能导致不同设备之间的互操作性问题, 为网络性能带来复杂度。
为此, 本发明提出了以下实施例, 以解决现有技术中存在的问题。
本发明提供的第一种承载处理方法实施例一:
图 1为本发明提供的第一种承载处理方法实施例一的流程图,具体包括如 下步骤:
步骤 101、根据接收到的承载建立请求消息 ,判断是否能够建立缺省承载 , 若是, 则执行步骤 102; 否则执行步骤 103;
步骤 102、 可以在建立缺省承载后, 再建立专用承载; 或者同时建立缺省 承载与专用承载;
步骤 103、返回响应消息; 该响应消息中可以包含用于说明没有建立承载 的原因的指示信息。
本实施例可以应用于初始上下文建立流程、 切换流程、 用户请求的 PDN 连通性流程或需要建立接入层承载的位置更新流程中。
本实施例首先建立缺省承载, 在可以成功建立缺省承载的前提下, 才考 虑建立专用承载; 如果缺省承载无法成功建立, 则不必建立专用承载, 直接 返回响应消息。 本实施例避免了出现缺省承载没有成功建立而专用承载已经 建立的情况, 进而解决了这种情况所引发的资源浪费的问题。
本发明提供的第一种承载处理方法实施例二:
本实施例在上述实施例一的基础上, 承载建立请求消息为包含缺省承载 信息而不包含专用承载信息的缺省承载建立请求消息, 其中建立专用承载具 体为: 根据接收到的专用承载建立请求消息, 建立专用专用专用承载。
下面以初始上下文建立流程为例, 详细说明本实施例的技术方案。
当 MME通过 S1-MME接口发起初始上下文建立流程时, 在作为缺省承载 建立请求消息的初始上下文建立请求消息中, 包含缺省承载信息但不包含专 用承载信息。 该初始上下文建立流程可以为附着流程、 或 UE发起的业务请求 流程、 或需要建立接入层承载的位置更新流程。
如表 3所示, 为本实施例初始上下文建立请求消息中包含的 MME希望 eNB建立的缺省承载列表的消息结构, 该消息中仅示出了与本实施例相关的 信息。
表 3. 本实施例的初始上下文建立请求消息
Figure imgf000015_0001
本实施例也可以在 UE请求的 PDN连通性流程中, 通过无线接入承载建立 流程建立缺省承载和专用承载时, 在无线接入承载建立请求消息中包含缺省 承载信息而不包含专用承载信息, 其具体的消息结构与表 3类似, 在此不再赘 述。
eNB和 UE判断是否能够建立所需的缺省承载, 若是, 继续初始上下文建 立流程, 建立专用承载, 具体地, 在继续初始上下文建立流程中, 可以发起 专用承载建立请求消息, 建立专用承载; 否则, 不必处理专用承载的建立情 况, 返回响应消息, 该响应消息中包含用于说明没有建立承载的原因的指示 信息。
上述响应消息可以为一个新的消息, 也可以为添加了指示信息的现有消 息, 例如初始上下文建立响应消息或切换响应消息或建立用户 PDN连通性响 应消息。
本实施例首先建立缺省承载, 在可以成功建立缺省承载的前提下, 再考 虑建立专用承载; 如果缺省承载无法成功建立, 则不必建立专用承载, 直接 返回响应消息。 本实施例避免了出现缺省承载没有成功建立而专用承载已经 建立的情况, 进而解决了这种情况所引发的资源浪费的问题。
本发明提供的第一种承载处理方法实施例三:
本实施例在上述实施例一的基础上, 承载建立请求消息包含缺省承载信 息和专用承载信息, 除此之外, 承载建立请求消息还包含缺省承载建立的优 先级信息, 或者, 接收包含缺省承载建立的特定指示信息。
下面以初始上下文建立流程为例, 详细说明本实施例的技术方案。
本实施例中 , 当 MME通过 S1-MME接口发起初始上下文建立流程时, 在 作为承载建立请求消息的初始上下文建立请求消息中, 同时包含缺省承载信 息和专用承载信息。 该初始上下文建立流程可以为附着流程、 或 UE发起的业 务请求流程、 或需要建立承载的位置更新流程。
如表 4所示, 为本实施例初始上下文建立请求消息结构, 该消息中仅示出 了与本实施例相关的信息。
表 4. 本实施例的初始上下文建立请求消息
Figure imgf000016_0001
本实施例也可以在 UE请求的 PDN连通性流程中, 通过无线接入承载建立 流程建立缺省承载和专用承载时, 在无线接入承载建立请求消息中同时包含 缺省承载信息和专用承载信息,其具体的信息结构与表 4类似,在此不再赘述。 有几种方式可以实现使目标侧接入节点首先考虑建立缺省承载:
( 1 )初始上下文建立请求消息中包含缺省承载建立的优先级信息或者特 别的指示信息: 例如可以用承载标识或者为缺省承载配置一个特定的属性表 示该优先级信息或者特别的指示信息,使得接入节点首先考虑建立缺省承载; ( 2 )通过一个新的通知信息, 通知该缺省承载建立的优先级信息或者特 别的指示信息。
eNB和 UE判断是否能够建立所需的缺省承载, 若是, 继续初始上下文建 立流程, 建立专用承载; 否则, 不必处理专用承载的建立情况, 返回响应消 息, 该响应消息中可以包含用于说明没有建立承载的原因的指示信息。
上述响应消息可以为一个新的消息, 也可以为添加了指示信息的现有消 息, 例如初始上下文建立响应消息或切换响应消息或建立用户 PDN连通性响 应消息。
本实施例首先建立缺省承载, 在可以成功建立缺省承载的前提下, 再考 虑建立专用承载; 如果缺省承载无法成功建立, 则不必建立专用承载, 直接 返回响应消息。 本实施例避免了出现缺省承载没有成功建立而专用承载已经 建立的情况, 进而解决了这种情况所引发的资源浪费的问题。
本发明提供的第一种承载处理方法实施例四:
在发生切换过程时, 目标节点区分出缺省承载和专用承载, 在缺省承载 能够切换成功的基础上, 再考虑专用承载的切换。 具体描述如下:
在切换过程中, 源节点指示目标节点首先考虑缺省承载的切换, 首先考 虑为缺省承载分配资源。
目标节点首先考虑缺省承载的切换的实现方式可以为以下两种:
( 1 )先后为缺省承载和专用承载发送切换请求消息; 其中缺省承载的切 换请求消息中可以只包含需要建立的缺省承载的消息;
( 2 )发送一条作为承载建立请求消息的切换请求消息, 该切换请求消息 中包含缺省承载和专用承载, 但可以釆用给缺省承载设定特定的优先级、 或 设置特别的指示 /属性、 或起到相同作用的其他方式, 使目标节点首先判断和 /或执行对缺省承载的切换。
若目标节点判断无法为缺省承载执行切换时, 目标节点可以直接拒绝该 切换或者认为该切换失败或者指示源节点进一步的行为 (如指示源接点选择 新的目标侧、 是否取消或终止切换过程等) , 而不必处理专用承载的切换情 况, 并返回作为承载响应消息的切换响应消息, 该切换响应消息中包含用于 说明无法成功执行切换承载的原因的指示信息。 若目标节点判断可以为缺省 承载执行切换时, 目标节点再处理专用承载的切换情况。
进一步, 当目标节点确定无法建立缺省承载时, 目标节点可以给源节点 消息和 /信息,所述消息和 /信息中可以包含用于说明拒绝继续执行所述切换流 程的原因的指示信息。 还可以指示源节点进一步的行为 (如重新尝试该切换 过程, 或重新选择新的切换目标, 如新的小区、 基站或接入系统; 或取消或 终止切换过程等)
当源节点确定目标节点无法建立缺省承载时, 源节点也可以给目标节点 消息和 /信息, 通知和 /或指示切换过程终止或取消。 或者, 源节点也可以发起 重试如重新尝试该切换过程, 或重新选择新的切换目标, 如新的小区、 基站 或接入系统等。
本实施例首先为缺省承载执行切换, 在可以成功为缺省承载执行切换的 前提下, 切换专用承载; 如果缺省承载无法成功执行切换, 则不必切换专用 承载, 还可以指示源节点进一步的行为 (如重新选择新的切换目标, 如新的 小区、 基站或接入系统; 是否取消或终止切换过程等) 。 本实施例避免了出 现缺省承载没有成功切换而专用承载成功切换的情况, 进而解决了这种情况 所引发的资源浪费的问题, 并且指出了目标节点无法建立缺省承载时, 源接 点和 /或目标节点的后续行为。
本发明提供的第二种承载处理方法实施例一:
图 2为本发明提供的第二种承载处理方法实施例一的流程图,具体包括如 下步骤:
步骤 201、 获知缺省承载没有成功建立;
具体地, 网络节点获知缺省承载没有成功建立的方式可包括: 通过收到 承载激活或建立响应消息、 切换响应消息、 上下文建立响应消息、 PDN连通性 响应消息或者其他的指示或通知信息等获得是否能够建立缺省承载或缺省承 载的建立结果。
步骤 202、 删除相关上下文。
进一步的, 当获知一个 PDN连接的缺省承载没有成功建立时, 可以本地 删除该 PDN连接相关的上下文。 如果是用户针对该 PDN的最后一个缺省承载 没有成功建立时, 则还可以进入非注册状态。
本实施例给出了当获知缺省承载没有成功建立时的后续行为。
本发明提供的第二种承载处理方法实施例二:
在附着流程中, 当 UE获知没有成功建立缺省承载时, UE可以进入非注 册状态, 具体描述如下:
当 UE获知缺省承载没有成功建立时, UE可以直接视作注册流程失败, 并可以在层间通知用于说明没有建立承载的原因的指示信息。
其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源的指 示信息, 或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示信 息, 或非接入层未能接受建立缺省承载请求的指示信息。
UE执行去附着流程, 可以删除相关的上下文, 从而进入非注册状态。
UE执行去附着流程和 /或删除相关上下文可以为本地执行, 即 UE在本地 隐式执行, 不再与 EPC节点进行信令交互; 或者, 可以釆取与网络交互的显 示执行方式。 当釆取显示执行方式时, 可以釆用 UE发起的去附着流程, UE 向 EPC节点发送用于说明没有建立承载的原因的指示信息。
本实施例给出了当获知缺省承载没有成功建立时, UE的后续行为。
本发明提供的第二种承载处理方法实施例三: 在附着流程或者 UE请求的 PDN连通性流程或者需要建立接入承载的位 置更新流程中, 如果 UE的缺省承载没有成功建立, 则 UE可以重新发起尝试。 具体描述如下:
当 UE获知没有成功建立缺省承载时, UE可以重新发起缺省承载建立请 求消息, 该缺省承载建立请求消息中可以包含用于说明重新发起缺省承载建 立的原因的指示信息。
其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源的指 示信息, 或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示信 息, 或非接入层未能接受建立缺省承载请求的指示信息。
该缺省承载建立请求消息可以为重新向网络发起的注册请求消息、 或
PDN连通性请求消息、 或位置更新请求消息。
上述请求消息可以重复发起一次或多次, 直到达到预设的次数或时间限 制, 或者直至重新建立缺省承载成功, 并结束。
当重新建立缺省承载失败时, 对于注册场景, UE可以执行去附着过程, 从而进入非注册状态; 对于 UE请求的 PDN连通性或者需要建立承载的位置更 新场景, UE可以删除特定 PDN连接的所有承载上下文;如果该 PDN连接是 UE 的最后一个 PDN连接, UE可以发起去附着过程。
上述 UE执行去附着过程和 /或删除相关上下文可以为本地执行, 即 UE在 本地隐式执行, 不再与 EPC节点进行信令交互; 或者, 可以釆取交互的显示 执行方式。 当釆取显示执行方式时, 若为删除 PDN连接, 可以釆用 UE发起的 PDN连接中断请求; 若为去附着用户, 可以釆用 UE发起的去附着流程。 在该 过程中, UE可以向 eNB和 /或 EPC节点发送用于说明没有建立承载的原因的指 示信息。 其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源 的指示信息,或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示 信息, 或非接入层未能接受建立缺省承载请求的指示信息。
本实施例给出了当获知缺省承载没有成功建立时, UE的后续行为。 本发明提供的第二种承载处理方法实施例四:
在发生切换过程时, 若 UE获知目标节点无法成功建立缺省承载时, UE 可以执行删除 PDN连接或去附着过程。 具体描述如下:
目标节点 (如 eNB )接收 EPC节点 (如 MME ) 的切换请求消息; 如果目 标 eNB能够为 UE建立上下文并有必要资源来建立部分或全部所需承载, 则将 切换请求应答消息反馈给 MME; 通过该切换请求应答消息, 目标 eNB会将能 够建立的承载列表以及不能建立的承载列表都通知给 MME。
如果 UE发现目标 eNB无法成功建立缺省承载, UE可以删除特定 PDN连接 的所有承载上下文, 该特定 PDN连接为无法成功建立的缺省承载对应的 PDN 连接, 并可以通知用于说明没有建立承载的原因的指示信息; 如果该 PDN连 接是 UE的最后一个 PDN连接, UE可以发起去附着过程。
上述 UE执行去附着过程和 /或删除相关上下文可以为本地执行, 即 UE在 本地隐式执行, 不再与 EPC节点进行信令交互; 或者, 可以釆取交互的显示 执行方式。 当釆用上述显示执行方式时, 若为删除 PDN连接, 可以釆用 UE发 起的 PDN连接中断请求; 若为去附着用户, 可以釆用 UE发起的去附着流程。
本实施例给出了在切换过程中, 当获知缺省承载没有成功建立时, UE的 后续行为。
本发明提供的第二种承载处理方法实施例五:
当 EPC节点 (如 MME )获知缺省承载没有成功建立时, EPC节点可以删 除 UE的所有相关承载资源和 /或上下文, 具体描述如下:
MME接收到 eNB发送的用于说明没有建立承载的原因的指示信息, 获知 缺省承载没有成功建立, 则 MME可以直接视作注册流程失败。
其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源的指 示信息, 或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示信 息, 或非接入层未能接受建立缺省承载请求的指示信息。
EPC节点可以删除 UE相关的上下文。 具体地, EPC节点执行去附着过程 和 /或删除相关上下文可以为本地执行, 即 MME在本地隐式执行, 不再与 UE 进行信令交互; 或者, 可以釆取与 UE交互的显示执行方式。 当釆用显示执行 方式时, 可以釆用 MME发起的去附着流程, 并将用于说明没有建立承载的原 因的指示信息发送给 eNB , eNB再转发给 UE。
本实施例给出了当获知缺省承载没有成功建立时, EPC节点的后续行为。 本发明提供的第二种承载处理方法实施例六:
如果 EPC节点 (如 MME )获知缺省承载没有成功建立, EPC节点可以重 新发起建立缺省承载尝试。 具体描述如下:
当 MME获知缺省承载没有成功建立时, EPC节点可以重新发起缺省承载 建立请求消息, 该缺省承载建立请求消息中包含用于说明没有建立承载的原 因的指示信息。
其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源的指 示信息, 或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示信 息, 或非接入层未能接受建立缺省承载请求的指示信息。
EPC节点重新发起缺省承载建立请求消息, 既可以釆用 EPC节点直接重 新向 UE和接入网发起缺省承载建立请求消息的方式, 也可以釆用 EPC节点请 求 UE重新执行建立缺省承载的尝试。
上述请求消息可以重复发起一次或多次,直到达到预设次数或时间限制, 或者直至重新建立缺省承载成功。
当重新建立缺省承载失败时, 对于注册场景, EPC节点可以执行去附着 过程,从而使 UE进入非注册状态; 对于 UE请求的 PDN连通性场景, UE和 EPC 节点可以认为该流程失败, 删除相关的承载上下文; 对于需要建立承载的位 置更新场景, UE和 EPC节点可以删除特定 PDN连接的所有承载上下文; 如果 该 PDN连接是 UE的最后一个 PDN连接, EPC节点可以发起去附着过程。
上述 EPC节点执行去附着过程和 /或删除相关上下文可以为本地执行, 即
EPC节点在本地隐式执行, 不再与 UE进行信令交互; 或者, 可以釆取交互的 显示执行方式。 当釆用上述显示执行方式时, 若为删除 PDN连接, 可以釆用 EPC节点发起的 PDN连接中断请求; 若为去附着用户,可以釆用 EPC发起的去 附着流程。 在该过程中, EPC节点可以向 eNB和 /或 UE发送用于说明没有建立 承载的原因的指示信息。
本实施例给出了当获知缺省承载没有成功建立时, EPC节点的后续行为。 本发明提供的第二种承载处理方法实施例七:
在发生切换过程时, 当 EPC节点获知目标节点无法成功建立缺省承载时, EPC节点可以执行删除 PDN连接或去附着过程。 具体描述如下:
目标节点(如 eNB )接收 EPC节点(如 MME )的切换请求消息; 如果 eNB 能够为 UE建立上下文并有必要资源来建立部分或全部所需承载, 则将切换请 求应答消息反馈给 MME; 通过该切换请求应答消息, eNB会将能够建立的承 载列表以及不能建立的承载列表都通知给 MME。
如果 MME发现 eNB无法成功建立缺省承载, 可以删除特定 PDN连接的所 有承载上下文,该特定 PDN连接为无法成功建立的缺省承载对应的 PDN连接, 并通知用于说明没有建立承载的原因的指示信息; 如果该 PDN连接是 UE的最 后一个 PDN连接, MME可以发起去附着过程。
上述 EPC节点执行去附着过程和 /或删除相关上下文可以为本地执行, 即 EPC节点在本地隐式执行, 不再与 UE进行信令交互; 或者, 可以釆取交互的 显示执行方式。 当釆用上述显示执行方式时, 若为删除 PDN连接, 可以釆用 EPC节点发起的 PDN连接中断请求; 若为去附着用户,可以釆用 EPC节点发起 的去附着流程。
本实施例给出了在切换过程中, 当获知缺省承载没有成功建立时, EPC 节点的后续行为。
本发明提供的第三种承载处理方法实施例:
本实施例中, 当获知缺省承载没有成功建立时, 重新发起缺省承载建立 的尝试。 作为本实施例的一种实施方式, 在附着流程或者 UE请求的 PDN连通性流 程或者需要建立接入承载的位置更新流程中, 如果 UE的缺省承载没有成功建 立, 则 UE可以重新发起缺省承载建立的尝试。 具体描述如下:
当 UE获知没有成功建立缺省承载时, UE可以重新发起缺省承载建立请 求消息, 该缺省承载建立请求消息中可以包含用于说明重新发起缺省承载建 立的原因的指示信息。
其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源的指 示信息, 或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示信 息, 或非接入层未能接受建立缺省承载请求的指示信息。
该缺省承载建立请求消息可以为重新向网络发起的注册请求消息、 或
PDN连通性请求消息、 或位置更新请求消息。
上述请求消息可以重复发起一次或多次, 直到达到预设的次数或时间限 制, 或者直至重新建立缺省承载成功, 并结束。
作为本实施例的另一种实施方式, 如果 EPC节点 (如 MME )获知缺省承 载没有成功建立, EPC节点可以重新发起缺省承载建立的尝试。 具体描述如 下:
当 MME获知缺省承载没有成功建立时, EPC节点可以重新发起缺省承载 建立请求消息, 该缺省承载建立请求消息中包含用于说明没有建立承载的原 因的指示信息。
其中指示信息可以为: 接入层没有建立缺省承载对应的用户面资源的指 示信息, 或 UE没有接收到非接入层的建立缺省承载指示 /请求消息的指示信 息, 或非接入层未能接受建立缺省承载请求的指示信息。
EPC节点重新发起缺省承载建立请求消息, 既可以釆用 EPC节点直接重 新向 UE和接入网发起缺省承载建立请求消息的方式, 也可以釆用 EPC节点请 求 UE重新执行建立缺省承载的尝试。
上述请求消息可以重复发起一次或多次,直到达到预设次数或时间限制, 或者直至重新建立缺省承载成功。
本发明提供的第四种承载处理方法实施例:
图 3为本发明提供的第四种承载处理方法实施例的流程图, 如图 3所示, 本实施例具体包括如下步骤:
步骤 301、 在切换流程执行过程中, 获知缺省承载没有成功建立; 步骤 302、 拒绝继续执行切换流程。
在发生切换过程中 ,若 UE和 /或 EPC节点获知目标 RAN节点无法成功建立 缺省承载时, UE和 /或 EPC节点可以拒绝该切换。 具体地, 当 UE由于移动或 其他原因, 需要改变为其服务的网络节点时, 会发生切换过程, 若 UE和 /或 EPC节点获知目标节点无法成功建立缺省承载时, UE和 /或 EPC节点可以拒绝 该切换。
本实施例以同一接入系统内部的 S1切换为例, 具体描述如下:
目标节点(如 eNB )接收 EPC节点(如 MME )的切换请求消息; 如果 eNB 能够为 UE建立上下文并有必要资源来建立部分或全部所需承载, 则将切换请 求应答消息反馈给 MME; 通过该切换请求应答消息, eNB会将能够建立的承 载列表以及不能建立的承载列表都通知给 MME。
如果 UE和 /或 MME发现 eNB无法成功建立缺省承载, 则拒绝继续执行该 切换流程。 该拒绝可以由 UE和 /或 EPC节点决定, 并可以携带特定的指示或原 因值, 例如: 目标 eNB向 MME发送切换失败消息, 该切换失败消息中包含用 于说明没有建立承载的原因的指示信息。
进一步的, 当目标节点确定无法建立缺省承载时, 目标节点可以给源节 点发送指示消息和 /信息,所述指示消息和 /信息中可以包含用于说明切换失败 或拒绝继续执行所述切换流程的原因的指示信息。 目标节点还可以指示源节 点后续行为 (如重新尝试该切换过程, 或重新选择新的切换目标, 如新的小 区、 基站或接入系统; 或取消或终止切换过程等)
当源节点确定目标节点无法建立缺省承载时, 源节点也可以给目标节点 发送指示消息和 /信息, 用于通知和 /或指示切换过程终止或取消。 或者, 源节 点也可以发起重试, 例如重新尝试该切换过程, 或重新选择新的切换目标, 该切换目标可以为新的小区、 基站或接入系统等。
上述后续行为的指示信息可以包含设定拒绝原因为 "目标侧无法建立缺 省承载" 或其他类似原因 /指示, 或 UE和 /或 EPC建议或决定重新选择一个接 入目标端或发起重试等。
同样, 在发生跨接入系统的切换时, 本实施例所述方案也是适用的。 本 实施例给出了在切换过程中, 当获知缺省承载没有成功建立时, UE或 EPC节 点的后续行为。
本发明提供的第五种承载处理方法实施例:
图 4为本发明提供的第五种承载处理方法实施例的流程图,具体包括如下 步骤:
步骤 401、 在 X2切换过程中, 若源 RAN节点 (如源 eNB )接收到需要执 行 S1接口流程的请求, 则源 RAN节点可以决定终止切换过程, 并可以向目的 RAN节点发送切换取消 /指示消息;
S1接口流程可以为承载处理流程、 或寻呼流程、 或非接入层信息传输流 程、 位置报告流程、 或上下文管理流程等, 承载管理流程可以为建立承载流 程或修改承载流程等; 上述切换取消 /指示消息中可以包含取消切换的原因 值;
步骤 402、 目的 RAN节点根据该切换取消 /指示消息, 终止切换过程; 步骤 403、 源 RAN节点执行 S1接口流程。
进一步的, 本实施例在执行步骤 403之后, 还可以包括: 源 RAN节点重新 发起切换过程。
本实施例提供了一种在 X2切换过程中, 当源 RAN节点接收到需要执行 S1 接口流程的请求时, 终止切换过程, 执行 S1接口流程的方案; 本实施例避免 了不必要的操作, 提高了系统的性能和效率。 本发明提供的第六种承载处理方法实施例一:
图 5为本发明提供的第六种承载处理方法实施例一的流程图,具体包括如 下步骤:
步骤 501、 在切换过程中, 若源 RAN节点接收到核心网络节点需要执行 S1接口流程的请求, 则源 RAN节点向核心网络节点发送 S1接口处理拒绝响应 /指示消息;
S1接口流程可以为承载处理流程、 或寻呼流程、 或非接入层信息传输流 程、 位置报告流程、 或上下文管理流程等, 当 S1接口流程为承载处理流程时, 该 S1接口处理拒绝响应 /指示消息包含拒绝承载处理的原因值;
步骤 502、 核心网络节点根据该 S1接口处理拒绝响应 /通知 /指示消息, 暂 停 S1接口流程;
步骤 503、 源 RAN节点继续执行切换过程;
步骤 504、 当切换失败时, 执行 S1接口流程; 当切换成功时, 根据切换结 果处理 S1接口流程。
本实施例提供了一种根据切换结果处理 S1接口流程的方案, 避免了不必 要的操作, 提高了系统的性能和效率。
需要说明的是, 本实施例所述方案, 不仅适用于承载处理流程, 同时也 可以适用于其他的 S1接口流程, 如寻呼、 NAS信息传输、 位置报告、 上下文 管理等流程, 也就是说, 在发生切换时, 若源 eNB收到需要执行这些流程的 请求, 源 eNB也可以釆用暂停切换过程, 执行所述 S1接口处理流程的方案; 本实施例避免了不必要的操作, 提高了系统的性能和效率。
本发明提供的第六种承载处理方法实施例二:
本实施例以 X2切换过程为例 , 若源 RAN节点 (如源 eNB )接收到核心网 络节点(如 EPC节点)需要执行 UE特定的流程(例如承载管理流程)的指令 / 请求, 则可以拒绝立即执行该指令 /请求。 具体描述如下:
当如源 eNB为 UE执行 X2切换过程时,若 EPC节点请求源 eNB为 UE执行承 载管理流程, 该承载管理流程可以为建立承载流程或修改承载流程等, 则源 eNB可以暂停承载处理流程, 并继续执行切换流程。
进一步的, 源 eNB可以向 MME通知暂停承载处理流程的原因是由于 UE 在执行切换。 当 MME收到暂停承载处理流程的通知后, 会等待切换完成。 当 切换失败时, MME可以直接重新执行承载处理流程; 当切换成功时, 则 MME 根据切换结果重新判断是否需要重新尝试承载处理流程; 若是, 则重新进行 此前所述的承载处理流程; 否则, 取消或终止此前所述的承载处理流程。
上述根据切换结果重新判断是否需要重新尝试承载处理流程可以具体如 下: 当承载处理流程所要执行承载管理的承载切换成功时, 则执行承载处理 流程, 即当网络节点原来打算执行承载管理的某个或某些承载在切换过程中 成功进行了切换, 则重新进行此前所述的承载处理流程; 当承载处理流程所 要执行承载管理的承载切换失败时, 则取消或终止承载处理流程, 即当网络 节点原来打算执行承载管理的某个或某些承载在切换过程中未能成功进行切 换, 则取消或终止此前所述的承载处理流程。
本实施例中, 在 X2切换过程中, 若源 RAN节点接收到需要执行承载管理 流程的指令 /请求, 则暂停承载处理流程, 并继续执行切换流程; 并根据切换 是否成功以及切换成功的结果确定是否执行承载处理流程; 本实施例避免了 由于切换过程中某些承载已经释放而 MME还要处理这些承载的不必要的操 作, 节省了资源, 提高了系统的性能和效率。
需要说明的是, 本实施例所述方案, 不仅适用于承载处理流程, 同时也 可以适用于其他的 S1接口流程, 如寻呼、 NAS信息传输、 位置报告、 上下文 管理等流程, 也就是说, 在发生切换时, 若源 eNB收到需要执行这些流程的 请求, 源 eNB也可以釆用暂停切换过程, 执行所述 S1接口处理流程的方案。
本发明提供的第六种承载处理方法实施例三:
本实施例以 LTE内部切换或者跨系统切换为例, 若 EPC节点 (如 SGW、
PGW )需要 /请求 MME和 /或 eNB为 UE执行特定的流程(例如承载管理流程) 时, 可以暂停或终止执行 UE特定的流程, 并可以携带特定的指示或原因值。 具体描述如下:
当源 RAN节点 (如源 eNB )为 UE准备或执行 LTE内部切换或者跨系统切 换时, 虽然源 RAN节点和某些 EPC节点 (如 MME )参与切换过程, 但是, 其 他 EPC节点(如 SGW、 PGW及 HSS等 )在一段时间内可能仍然不知道 UE正在 执行切换。 当源 eNB和 MME正在为 UE执行 S1切换或跨系统切换过程时, 若其 他 EPC节点(如 SGW、 PGW )需要 /请求 MME和 /或 eNB为 UE执行承载管理流 程, 该承载管理流程可以为建立承载流程或修改承载流程等, 此时, 可以暂 停承载处理流程。
进一步的, 源 eNB可以向其他 EPC节点通知暂停承载处理流程的原因是 由于 UE在执行切换。 当其他 EPC节点收到暂停承载处理流程的通知后, 会等 待切换完成。 当切换失败时, 其他 EPC节点可以直接重新执行承载处理流程; 当切换成功时, 则其他 EPC节点根据切换结果重新判断是否需要重新尝试承 载处理流程; 若是, 则重新进行此前所述的承载处理流程; 否则, 取消或终 止此前所述的承载处理流程。
上述根据切换结果重新判断是否需要重新尝试承载处理流程可以具体如 下: 当承载处理流程所要执行承载管理的承载切换成功时, 则执行承载处理 流程, 即当其他 EPC节点原来打算执行承载管理的某个或某些承载在切换过 程中成功进行了切换, 则重新进行此前所述的承载处理流程; 当承载处理流 程所要执行承载管理的承载切换失败时, 则取消或终止承载处理流程, 即当 其他 EPC节点原来打算执行承载管理的某个或某些承载在切换过程中未能成 功进行切换, 则取消或终止此前所述的承载处理流程。
本实施例中, 在 LTE内部切换或者跨系统切换过程中, 若 EPC节点 (如 SGW、 PGW )需要 /请求 MME和 /或 eNB为 UE执行承载管理流程, 则暂停承载 处理流程, 并继续执行切换流程; 并根据切换是否成功以及切换成功的结果 确定是否执行承载处理流程; 本实施例避免了由于切换过程中某些承载已经 释放而 MME还要处理这些承载的不必要的操作, 节省了资源, 提高了系统的 性能和效率。
需要说明的是, 本实施例所述方案, 不仅适用于承载处理流程, 同时也 可以适用于其他的 S1接口流程, 如寻呼、 NAS信息传输、 位置报告、 上下文 管理等流程, 也就是说, 在发生切换时, 若源 eNB收到需要执行这些流程的 请求, 源 eNB也可以釆用暂停切换过程, 执行所述 S1接口处理流程的方案。
本发明提供的一种附着方法实施例:
本实施例在 UE注册过程中, EPC节点和 eNB分开处理 EMM信息(如附着 接受消息)和 ESM信息 (承载相关消息) 。
在本实施例的附着流程中 , EPC节点(如 MME )经过 eNB发送给 UE的 NAS 层附着接受消息, 可以不与包含着建立承载所需要的 NAS层承载信息 (ESM message container )绑定在一起的。
本实施例具体在初始上下文建立请求消息中, 特定承载表示可以继续与 特定 NAS信息绑定, 但这种绑定的 NAS信息只是 ESM相关的 NAS内容, 不再 包含 EMM信息 (如附着接受消息) 。 如表 5所示, 为本实施例初始上下文建 立请求消息结构, 该消息中仅示出了与本实施例相关的信息。
表 5. 本实施例初始上下文建立请求消息
Figure imgf000030_0001
而与 EMM相关的 NAS信息(例如附着接受消息)既可以作为初始上下文 建立请求消息中一个独立的信息单元, 并经过 eNB传递给 UE, 也可以通过下 行 NAS传输消息经过 eNB传递给 UE。当与 EMM相关的 NAS信息作为初始上下 文建立请求消息中一个独立的信息单元时, 无论 eNB是否能够成功建立缺省 承载, eNB都将包含 EMM信息的 NAS信息单元传递给 UE。 也就是说, eNB总 会将 EMM相关的 NAS信息传递给 UE。
作为另外一种实施方式, 当 EPC节点获知由于承载未建立使 EMM相关的 NAS信息没有被传递给 UE时, EPC节点可以通过一个单独的消息经 eNB将 EMM相关的 NAS信息发送给 UE。
本实施例中, 初始上下文建立请求消息中 ESM信息不与 EMM信息绑定, 无论 eNB是否能够成功建立缺省承载, eNB都将包含 EMM信息的 NAS信息单 元传递给 UE,避免了当 eNB不能建立某些承载时, 与这些承载绑定的 EMM信 息无法传递给 UE的情况。
图 6为本发明提供的第一种承载处理装置实施例的结构示意图, 如图 6所 示, 本实施例包括: 判断模块 11、 承载建立模块 12和响应模块 13 , 其中, 判 断模块 11根据接收到的承载建立请求消息, 判断是否能够建立缺省承载; 当 判断模块 11判断出能够建立缺省承载时, 承载建立模块 12建立缺省承载, 并 在建立缺省承载后, 建立专用承载; 或者, 同时建立缺省承载与专用承载; 当判断模块 11判断出不能建立缺省承载时, 响应模块 13返回响应消息, 该响 应消息中包含用于说明没有建立承载的原因的指示信息。
本实施例首先建立缺省承载, 在可以成功建立缺省承载的前提下, 建立 专用承载; 如果缺省承载无法成功建立, 则不必建立专用承载, 直接返回响 应消息。 本实施例避免了出现缺省承载没有成功建立而专用承载已经建立的 情况, 进而解决了这种情况所引发的资源浪费的问题。
图 7为本发明提供的第二种承载处理装置实施例的结构示意图, 如图 7所 示, 本实施例包括: 获知模块 21和删除模块 22, 其中, 获知模块 21获知缺省 承载没有成功建立; 当获知模块 21获知缺省承载没有成功建立时, 删除模块 22删除相关上下文。
进一步的, 本实施例还可以包括发起模块 23 , 当获知模块 21获知缺省承 载没有成功建立时, 该发起模块 23重新发起缺省承载建立请求消息, 该缺省 承载建立请求消息中包含用于说明重新发起缺省承载建立的原因的指示信 息。
本实施例还可以包括去附着模块 24, 该去附着模块 24执行去附着流程。 上述删除模块 22可以具体用于当获知一个以上 PDN连接的缺省承载没有 成功建立时, 删除 PDN连接相关的上下文; 若 UE针对 PDN连接的最后一个缺 省承载没有成功建立, 去附着模块 24执行去附着流程。
本实施例还可以包括发送模块 25 , 当釆用显示执行方式执行去附着流程 和 /或删除相关上下文时, 发送模块 25发送用于说明没有建立承载的原因的指 示信息。
本实施例给出了当获知缺省承载没有成功建立时的后续行为。
图 8为本发明提供的第三种承载处理装置实施例的结构示意图, 如图 8所 示, 本实施例包括: 获知模块 31和执行模块 32, 其中, 获知模块 31获知缺省 承载没有成功建立; 当获知模块 31获知缺省承载没有成功建立时, 执行模块 32重新发起缺省承载建立的尝试。
本实施例给出了当获知缺省承载没有成功建立时的后续行为。
图 9为本发明提供的第四种承载处理装置实施例的结构示意图, 如图 9所 示, 本实施例包括: 获知模块 41和拒绝模块 42, 其中, 获知模块 41获知缺省 承载没有成功建立; 在切换流程执行过程中, 当获知模块 41获知缺省承载没 有成功建立时, 拒绝模块 42拒绝继续执行切换流程。
本实施例给出了在切换过程中, 当获知缺省承载没有成功建立时, UE或 EPC节点的后续行为。
图 10为本发明提供的第五种承载处理装置实施例的结构示意图, 如图 10 所示, 本实施例包括: 发送模块 51和执行模块 52, 其中, 在 X2切换过程中, 若源 RAN节点接收到需要执行 S1接口流程的请求, 则发送模块 51向目的 RAN 节点发送切换取消 /指示消息; 在目的 RAN节点终止切换过程后, 执行模块 52 执行 S1接口流程。
进一步的, 本实施例还可以包括发起模块 53 , 当执行模块 52执行完 S1接 口流程后, 该发起模块 53重新发起切换过程。
本实施例提供了一种在 X2切换过程中, 当源 RAN节点接收到需要执行承 载处理流程的请求时, 终止切换过程, 执行承载处理流程的方案; 本实施例 避免了不必要的操作, 提高了系统的性能和效率。
图 11为本发明提供的第六种承载处理装置实施例的结构示意图, 如图 11 所示, 本实施例包括: 发送模块 61、 执行模块 62和处理模块 63 , 其中, 在切 换过程中, 若源 RAN节点接收到核心网络节点需要执行 S1接口流程的请求, 发送模块 61向核心网络节点发送 S1接口处理拒绝响应 /指示消息; 在核心网络 节点暂停 S1接口流程后, 执行模块 62继续执行切换过程; 处理模块 63当切换 失败时, 执行 S1接口流程; 当切换成功时, 根据切换结果处理 S1接口流程。
进一步的, S1接口流程具体为承载处理流程, 当切换成功且承载处理流 程所要执行承载管理的承载切换成功时, 处理模块 63执行承载处理流程; 当 切换成功且承载处理流程所要执行承载管理的承载切换失败时, 处理模块 63 取消或终止承载处理流程。
本实施例提供了一种根据切换结果处理承载处理流程的方案, 避免了不 必要的操作, 提高了系统的性能和效率。
本发明还提供了一种附着装置实施例, 该实施例包括: 发送模块, 用于 发送初始上下文建立请求消息; 该初始上下文建立请求消息中 EPS会话管理 信息不与 EPS移动性管理信息进行绑定。
本实施例中, 初始上下文建立请求消息中 ESM信息不与 EMM信息绑定, 无论 eNB是否能够成功建立缺省承载, eNB都将包含 EMM信息的 NAS信息单 元传递给 UE,避免了当 eNB不能建立某些承载时, 与这些承载绑定的 EMM信 息无法传递给 UE的情况。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤, 而前述 的存储介质包括: ROM, RAM, 磁碟或者光盘等各种可以存储程序代码的介 质。 非对其限制; 尽管参照前述实施例对本发明实施例进行了详细的说明, 本领 域的普通技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案 进行修改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的本质脱离本发明实施例各实施例技术方案的精神和范 围。

Claims

权 利 要 求
1、 一种承载处理方法, 其特征在于包括:
根据接收到的承载建立请求消息, 判断是否能够建立缺省承载; 若是, 则在建立缺省承载后, 建立专用承载; 或者, 同时建立缺省承载 与专用承载;
否则, 返回响应消息; 所述响应消息中可以包含用于说明没有建立承载 的原因的指示信息。
2、 根据权利要求 1 所述的承载处理方法, 其特征在于, 所述承载建立 请求消息为包含缺省承载信息而不包含专用承载信息的缺省承载建立请求消 息。
3、 根据权利要求 2所述的承载处理方法, 其特征在于所述建立专用承 载包括: 根据接收到的专用承载建立请求消息, 建立专用承载。
4、 根据权利要求 1 所述的承载处理方法, 其特征在于, 所述承载建立 请求消息包含缺省承载信息和专用承载信息;
所述承载请求消息中还包含缺省承载建立的优先级信息; 或者, 接收包 含缺省承载建立的优先级信息的指示消息。
5、 一种承载处理方法, 其特征在于包括:
当获知缺省承载没有成功建立时, 删除相关上下文。
6、 根据权利要求 5所述的承载处理方法, 其特征在于, 在所述删除相 关上下文之前还包括: 当获知缺省承载没有成功建立时, 重新发起缺省承载 建立请求消息, 所述缺省承载建立请求消息中可以包含用于说明重新发起缺 省承载建立的原因的指示信息。
7、 根据权利要求 5所述的承载处理方法, 其特征在于还包括: 执行去 附着流程。
8、 根据权利要求 5所述的承载处理方法, 其特征在于, 所述当获知缺 省承载没有成功建立时, 删除相关上下文包括: 当获知一个以上分组数据网 络 PDN连接的缺省承载没有成功建立时,删除所述 PDN连接相关的上下文; 若用户设备针对所述 PDN连接的最后一个缺省承载没有成功建立,所述 方法还包括: 执行去附着流程, 进入非注册状态。
9、 根据权利要求 7或 8所述的承载处理方法, 其特征在于, 所述执行 去附着流程和 /或删除相关上下文具体为: 釆用隐式执行方式或者显示执行方 式, 执行去附着流程和 /或删除相关上下文。
10、 根据权利要求 9所述的承载处理方法, 其特征在于, 当釆用所述显 示执行方式时, 所述方法还包括: 发送用于说明没有建立承载的原因的指示 信息。
11、 一种承载处理方法, 其特征在于包括:
当获知缺省承载没有成功建立时, 重新发起缺省承载建立的尝试。
12、 一种承载处理方法, 其特征在于包括:
在切换流程执行过程中, 当获知缺省承载没有成功建立时, 拒绝继续执 行所述切换流程。
13、 根据权利要求 12所述的承载处理方法, 其特征在于, 当目标节点 获知缺省承载没有成功建立时, 所述方法还包括:
所述目标节点向源节点发送指示消息, 所述指示消息包含用于说明切换 失败或拒绝继续执行切换流程的原因的指示信息;
所述目标节点指示源节点的后续行为, 所述后续行为包括重新尝试所述 切换流程、 或重新选择新的切换目标、 或取消切换流程。
14、 根据权利要求 12所述的承载处理方法, 其特征在于, 当源节点获 知缺省承载没有成功建立时, 所述方法还包括:
所述源节点向目标节点发送指示消息, 所述指示消息用于指示取消或终 止所述切换流程;
或者, 所述源节点重新尝试所述切换流程或重新选择新的切换目标。
15、 一种承载处理方法, 其特征在于包括: 在 X2切换过程中, 若源无线接入网络 RAN节点接收到需要执行 S1接 口流程的请求, 则源 RAN节点向目的 RAN节点发送切换取消 /指示消息; 目的 RAN节点根据所述切换取消 /指示消息, 终止所述切换过程; 源 RAN节点执行所述 S1接口流程。
16、 根据权利要求 15所述的承载处理方法,其特征在于,在所述源 RAN 节点执行所述 S 1接口流程之后, 还包括: 源 RAN节点重新发起切换过程。
17、 根据权利要求 15或 16所述的承载处理方法, 其特征在于, 所述 S1接口流程具体为承载处理流程、 或寻呼流程、 或非接入层信息传输流程、 位置 ^艮告流程、 或上下文管理流程。
18、 一种承载处理方法, 其特征在于包括:
在切换过程中,若源无线接入网络 RAN节点接收到核心网络节点需要执 行 S 1接口流程的请求, 则源 RAN节点向核心网络节点发送 S 1接口处理拒 绝响应 /指示消息;
所述核心网络节点根据所述 S 1接口处理拒绝响应 /指示消息, 暂停所述 S1接口流程;
源 RAN节点继续执行所述切换过程;
当切换失败时, 执行所述 S1接口流程; 当切换成功时, 根据切换结果处 理所述 S1接口流程。
19、 根据权利要求 18所述的承载处理方法, 其特征在于, 所述 S1接口 流程具体为承载处理流程、 或寻呼流程、 或非接入层信息传输流程、 位置报 告流程、 或上下文管理流程。
20、 根据权利要求 19所述的承载处理方法, 其特征在于, 当所述 S1接 口流程为承载处理流程时, 所述根据所述切换结果处理所述 S 1 接口流程包 括:
当所述承载处理流程所要执行承载管理的承载切换成功时, 则执行所述 承载处理流程; 当所述承载处理流程所要执行承载管理的承载切换失败时, 则取消或终 止所述承载处理流程。
21、 一种附着方法, 其特征在于包括:
在附着流程中, 网络节点向基站发送初始上下文建立请求消息; 所述初 始上下文建立请求消息中演进分组系统 EPS会话管理信息不与 EPS移动性管 理信息进行绑定。
22、 根据权利要求 21所述的附着方法, 其特征在于, 所述 EPS移动性 管理信息是所述初始上下文建立请求消息中一个独立的信息单元; 或者, 所 述 EPS移动性管理信息通过一个独立的消息进行传递。
23、 一种承载处理装置, 其特征在于包括:
判断模块, 用于根据接收到的承载建立请求消息, 判断是否能够建立缺 省承载;
承载建立模块, 用于当判断出能够建立缺省承载时, 建立缺省承载; 并 在建立缺省承载后, 建立专用承载; 或者, 同时建立缺省承载与专用承载; 响应模块, 用于当判断出不能建立缺省承载时, 返回响应消息; 所述响 应消息中包含用于说明没有建立承载的原因的指示信息。
24、 一种承载处理装置, 其特征在于包括:
获知模块, 用于获知缺省承载没有成功建立;
删除模块, 用于当获知缺省承载没有成功建立时, 删除相关上下文。
25、 根据权利要求 24所述的承载处理装置, 其特征在于还包括: 发起 模块, 用于当获知缺省承载没有成功建立时, 重新发起缺省承载建立请求消 息,所述缺省承载建立请求消息中包含用于说明重新发起缺省承载建立的原 因的指示信息。
26、 根据权利要求 24或 25所述的承载处理装置, 其特征在于还包括: 去附着模块, 用于执行去附着流程。
27、 根据权利要求 26所述的承载处理装置, 其特征在于, 所述删除模 块具体用于当获知一个以上分组数据网络 PDN连接的缺省承载没有成功建 立时, 删除所述 PDN连接相关的上下文; 若用户设备针对所述 PDN连接的 最后一个缺省承载没有成功建立, 所述去附着模块执行去附着流程。
28、 根据权利要求 27所述的承载处理装置, 其特征在于还包括: 发送 模块, 用于当釆用显示执行方式执行去附着流程和 /或删除相关上下文时, 发 送用于说明没有建立承载的原因的指示信息。
29、 一种承载处理装置, 其特征在于包括:
获知模块, 用于获知缺省承载没有成功建立;
执行模块, 用于当获知缺省承载没有成功建立时, 重新发起缺省承载建 立的尝试。
30、 一种承载处理装置, 其特征在于包括:
获知模块, 用于获知缺省承载没有成功建立;
拒绝模块, 用于在切换流程执行过程中, 当获知缺省承载没有成功建立 时, 拒绝继续执行所述切换流程。
31、 一种承载处理装置, 其特征在于包括:
发送模块, 用于在 X2切换过程中, 若源无线接入网络 RAN节点接收到 需要执行 S1接口流程的请求, 则向目的 RAN节点发送切换取消 /指示消息; 执行模块, 用于在所述目的 RAN 节点终止所述切换过程后, 执行所述 S1接口流程。
32、 根据权利要求 31所述的承载处理装置, 其特征在于还包括: 发起 模块, 用于重新发起切换过程。
33、 一种承载处理装置, 其特征在于包括:
发送模块, 用于在切换过程中,若源无线接入网络 RAN节点接收到核心 网络节点需要执行 S1接口流程的请求, 则向核心网络节点发送 S1接口处理 拒绝响应 /指示消息;
执行模块, 用于在所述核心网络节点暂停所述 S1接口流程后, 继续执行 所述切换过程;
处理模块, 用于当切换失败时, 执行所述 S1接口流程; 当切换成功时, 根据切换结果处理所述 S1接口流程。
34、 根据权利要求 33所述的承载处理装置, 其特征在于, 所述 S1接口 流程为承载处理流程, 当切换成功且所述承载处理流程所要执行承载管理的 承载切换成功时, 所述处理模块执行所述承载处理流程;
当切换成功且所述承载处理流程所要执行承载管理的承载切换失败时, 所述处理模块取消或终止所述承载处理流程。
35、 一种附着装置, 其特征在于包括:
发送模块, 用于发送初始上下文建立请求消息; 所述初始上下文建立请 求消息中演进分组系统 EPS会话管理信息不与 EPS移动性管理信息进行绑 定。
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