WO2017222344A1 - Appareil et procédé de support de transmission de données - Google Patents

Appareil et procédé de support de transmission de données Download PDF

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Publication number
WO2017222344A1
WO2017222344A1 PCT/KR2017/006669 KR2017006669W WO2017222344A1 WO 2017222344 A1 WO2017222344 A1 WO 2017222344A1 KR 2017006669 W KR2017006669 W KR 2017006669W WO 2017222344 A1 WO2017222344 A1 WO 2017222344A1
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WO
WIPO (PCT)
Prior art keywords
data
network node
radio access
access network
data forwarding
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PCT/KR2017/006669
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English (en)
Inventor
Xiaowan KE
Hong Wang
Lixiang Xu
Original Assignee
Samsung Electronics Co., Ltd.
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.)
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Publication date
Priority claimed from CN201710302321.0A external-priority patent/CN107548127B/zh
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to US16/312,604 priority Critical patent/US11140601B2/en
Publication of WO2017222344A1 publication Critical patent/WO2017222344A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/06—Registration at serving network Location Register, VLR or user mobility server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H04W36/023—Buffering or recovering information during reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the UE QoS flow level data forwarding requirement information includes information of a UE QoS flow, and whether the QoS flow has the data forwarding requirement.
  • a data transmission supporting method includes: determining, by a second radio access network node, whether data forwarding address information associated with a user equipment (UE) is needed according to obtained data information associated with the UE; when the data forwarding address information is needed, determining, by the second radio access network node, the data forwarding address information associated with the UE, and transmitting the determined data forwarding address information associated with the UE.
  • UE user equipment
  • the second radio access network node determines a UE level data forwarding address, a UE bearer level data forwarding address, a UE session level data forwarding address, a UE QoS flow level data forwarding address and/or a UE service data flow level data forwarding address, constructs the data forwarding address information associated with the UE.
  • the data information associated with the UE comprises at least one of items as follows: data forwarding requirement information associated with the UE and the UE context.
  • the method further comprises: after data at any data forwarding address in the second data forwarding address information is completely forwarded, transmitting, by the core network node, an end marker or a data transmission completion notification to a first data forwarding address corresponding to the data completely forwarded; and/or after transmitting the second data forwarding address information or when receiving the first data forwarding address information associated with the UE and/or the data information associated with the UE, the method further comprises: receiving, by the core network node, a message transmitted from the first radio access network node or the second radio access network node and used for requesting release of the UE context in the first radio access network node; indicating, by the core network node, the first radio access network node to release the UE context; and/or after the core network node transmits the second data forwarding address information, or after the core network node receives the data forwarding completion notification transmitted from the first radio access network node, the method further comprises: updating, by the core network node, an address of a UE bearer, a
  • the first radio access network node transmits data forwarding completion information to the second radio access network node or the core network node; and/or after there is no data forwarding requirement or the data forwarding is completed, the first radio access network node requires UE context release to the core network node or the second radio access network node; or after there is no data forwarding requirement or the data forwarding is completed, the first radio access network node automatically releases the UE context.
  • a data transmission supporting apparatus includes an address determining module and a transmitting module; the address determining module, to determine whether data forwarding address information associated with a user equipment (UE) is needed according to obtained data information associated with the UE; determine the data forwarding address information associated with the UE when the data forwarding address information is needed; the transmitting module, to transmit the data forwarding address information associated with the UE.
  • the address determining module to determine whether data forwarding address information associated with a user equipment (UE) is needed according to obtained data information associated with the UE; determine the data forwarding address information associated with the UE when the data forwarding address information is needed
  • the transmitting module to transmit the data forwarding address information associated with the UE.
  • the radio access network node can optimize the data transmission way of the UE, maintain service continuity, support a light connection function, save signaling overhead, and reduce time delay that the UE accesses the network.
  • FIG. 3 is a flowchart illustrating a second method for supporting data transmission method according to the present disclosure
  • FIG. 7 is a schematic diagram illustrating a data transmission method according to a second embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram illustrating a data transmission method according to a sixth embodiment of the present disclosure.
  • FIG. 15 is a fourth schematic diagram illustrating a basic structure of a data transmission apparatus according the present disclosure.
  • FIG. 18 is a schematic diagram illustrating initial system architecture of the next generation of network (5G) according to existing technologies.
  • the Light Connection includes that the radio access network does not request a core network to release a connection of the UE when the radio access network releases the UE connection, or the UE connection is inactive, e.g., a connection of the UE between the base station and the MME (the control plane of a S1 interface), a connection of the UE between the base station and the Serving Gateway (SGW) (the user plane of the S1 interface), the connection associated with the UE between the base station and an Access and Mobility Management Function (AMF) (NG-C interface control plane), the connection associated with the UE between the base station and a User Plane Function (UPF) (NG-U interface user plane).
  • MME the control plane of a S1 interface
  • SGW Serving Gateway
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • Problem 1 after the connection between the UE and an old radio access network node is released, becomes inactive, is changed to the light connection, or suspended, the UE may move to coverage of a new radio access network node, and accesses the new radio access network node. During this process, there is a problem how the new radio access network node obtains data before connection establishment.
  • a UE movement range is a UE paging range.
  • a core network control node may be a MME, a SGSN, AMF, etc.
  • the access information of the UE includes at least one of the following: a UE identity, an identity of the second radio access network node, a PLMN identity, a location identity (e.g., a TA identity TAC, TAI), a cell identity, an access category.
  • the second radio access network node is the radio access network node accessed by the UE.
  • the access information of the UE may be carried in the following message: a retrieve UE context request message, a message among new radio access network nodes (e.g., X2AP, XnAP), a UE context release message.
  • a retrieve UE context request message e.g., X2AP, XnAP
  • a message among new radio access network nodes e.g., X2AP, XnAP
  • the first node confirms that the UE legally accesses the second radio access network node according to the access information of the UE.
  • the first node is the first radio access network node.
  • the first radio access network node obtains the UE context to be released by receiving the UE context release command, e.g., receiving the UE context release command message transmitted from the core network.
  • the first radio access network node may determine that release or suspend of the UE context is needed. The first radio access network node may proactively initiate the UE context release request or the UE context suspend request to the core network node.
  • the first node is the first radio access network node.
  • the first radio access network node may directly transmit the data information associated with the UE or the buffered data of the UE to the second radio access network node, or, forwards the data information associated with the UE or the buffered data of the UE to the core network node.
  • the first node is the core network node.
  • the first radio access network node when determining that the pre-defined condition is satisfied (as described in block 301), transmits the data information associated with the UE or the data of the UE buffered in the first radio access network node.
  • the first radio access network may transmit the data information associated with the UE to the control plane node of the core network.
  • the first radio access network node may forward the data of the UE buffered in the first radio access network node to the core network, e.g., forwarding control plane data to the control plane node of the core network, and transmitting user plane data to the user plane node of the core network.
  • the first radio access network node when the satisfied pre-defined condition includes that the data forwarding command is received, transmits downlink data to an uplink address configured for the UE bearer, an uplink address configured for the UE session, an uplink address configured for the UE QoS flow and/or an uplink address configured for the UE service data flow.
  • the data of the UE buffered in the first node may include the UE-level data of the UE, UE-bearer-level data of the UE, UE-session-level data of the UE, UE-QoS-flow-level data of the UE and/or UE-service-data-flow-level data of the UE.
  • the data of the UE buffered in the first node may include at least one of the following: control plane data of the UE (e.g., NAS signaling), user plane data of the UE.
  • the user plane date of the UE is the UE-bearer-level user plane data of the UE, the UE-session-level user plane data of the UE, the UE-QoS-flow-level user plane data of the UE, the UE-service-data-steam-level user plane data of the UE and/or the UE-level user plane data of the UE.
  • control plane data of the UE may be transmitted to the second radio access network node through a UE-level NAS PDU, a UE-session-level NAS PDU, a UE-QoS-flow-level NAS PDU, a UE-service-data-steam-level NAS PDU and/or a UE-bearer-level NAS PDU (e.g., by means of a NAS PDU in a handover request message, the Retrieve UE context response message).
  • the first radio access network node when directly transmitting the buffered data of the UE, may distinguish the UE-level data, the UE-session-level data, the UE-QoS-flow-level data, the UE-service-data-steam-level data and/or the UE-bearer-level data to perform transmission, e.g., at least one of the following items is added into a message between radio access network nodes (the handover request message or the Retrieve UE context response message): a UE-level data information element, a UE-session-level data information element, a UE-QoS-flow-level data information element, a UE-service-data-steam-level data information element and/or a UE-bearer-level data information element.
  • the first radio access network node when directly transmitting the buffered data of the UE, distinguishes the control plane data of the UE and the data plane data of the UE to perform transmission, e.g., at least one of items as follows is added into a message between the radio access network nodes (the handover request message or the Retrieve UE context response message) the UE-level data information element and/or the UE-bearer-level data information element.
  • the UE context may include at least one of the following: a UE identity, information of the UE bearer, information of the UE session, information of the UE QoS flow, information of the UE service data flow.
  • the information of the UE bearer may include at least one of the following: a bearer identity of the UE (e.g., DRB ID, E-RAB ID).
  • the information of the UE session may include at least one of the following: a UE session identity (e.g., PDU Session ID).
  • the information of the UE QoS flow may include at least one of the following: a UE QoS flow identity (e.g., QFI. QCI, etc.).
  • the information of the UE service data flow may include at least one of the following: a UE service data flow identity (e.g., IP five tuple, TFT, etc.).
  • the data forwarding requirement information associated with the UE may be a UE-level data forwarding requirement information, a UE-bearer-level data forwarding requirement information, a UE-session-level data forwarding requirement information, a UE-QoS flow level data forwarding requirement information, a UE-service-data-flow-level data forwarding requirement information.
  • the UE-bearer-level data forwarding requirement information may include the information of the UE bearer, and may indicate whether the data forwarding requirement exists for the bearer.
  • the UE-session-level data forwarding requirement information may include the information of the UE session, and may indicate whether the data forwarding requirement exists for the UE session.
  • the UE-QoS-flow-level data forwarding requirement information may include the information of the UE QoS flow, and may indicate whether the data forwarding requirement exists for the UE QoS flow.
  • the UE-service-data-flow-level data forwarding requirement information may include the information of the UE service data flow, and may indicate whether the data forwarding requirement exists for the UE service data flow.
  • the data forwarding requirement information of the UE may be a control plane data forwarding requirement information associated with the UE or a user plane data forwarding requirement information associated with the UE.
  • the data forwarding requirement information associated with the UE may include at least one of the following: whether there is the buffered data of the UE, the data category of the UE, the information of the UE bearer, the information of the UE session, the information of the UE QoS flow, the information of the UE service data flow, the data direction of the UE, the number of the buffered data packets.
  • whether there is the buffered data of the UE may be represented in whether UE data forwarding is required (e.g., the data forwarding is required when there is the buffered data, and the data forwarding is not required when there is no buffered data).
  • the data category of the UE may include at least one of the following: the control plane data of the UE, the user plane data of the UE.
  • the data category of the UE may only include the data category of the buffered UE data.
  • the information of the UE bearer may be the information of the bearer with the buffered data or information of all bearers of the UE.
  • the information of the UE bearer includes content as described above, which is not repeatedly described herein.
  • the information of the UE session may be the information of the session with the buffered data or information of all sessions of the UE.
  • the information of the UE session includes content as described above, which is not repeatedly described herein.
  • the information of the UE service data flow may be the information of the service data flow with the buffered data or information of all service data flows of the UE.
  • the information of the UE service data flow includes content as described above, which is not repeatedly described herein.
  • the first radio access network node transmits the retrieve UE context response message to the second radio access network node;
  • the first radio access network node transmits the handover request message to the second radio access network node to handover the UE to the second radio access network node, and implements the transmission of the data information associated with the UE or the buffered data of the UE through the handover procedure.
  • FIG. 3 is a flowchart illustrating a second method for supporting data transmission according to the present disclosure.
  • a processing process of the second radio access network node in data transmission is described in the procedure.
  • a first radio access network node refers to an old radio access network node which stores UE context, but its connection with a UE is disconnected, is a light connection, is inactive, or is suspended; the second radio access network node refers to the radio access network node newly accessed by the UE.
  • the procedure includes steps as follows.
  • the obtained data information associated with the UE it is determined whether the data forwarding address information is needed.
  • whether there is data buffered at the first radio access network node may be determined according to the data forwarding requirement information associated with the UE, if positive, the second radio access network node determines that the data forwarding address information associated with the UE is needed; otherwise, the second radio access network node determines that the data forwarding address information associated with the UE is not needed, and the procedure ends.
  • the data forwarding address is confirmed, if the data associated with the UE is received for the UE bearer, the UE session, the UE QoS flow and/or the UE service data flow which previously do not have the data forwarding requirement, the data is still forwarded.
  • the data forwarding address information associated with the UE may the UE-level data forwarding address information, the UE-session-level data forwarding address information, the UE-QoS-flow-level data forwarding address information, the UE-service-data-flow-level data forwarding address information and/or the UE-bearer-level data forwarding address information.
  • the UE bearer, the UE session, the UE QoS flow and/or the UE service data flow may be a user plane UE bearer, a user plane UE session, a user plane UE QoS flow, and/or a user plane UE service data flow, e.g., the UE bearer may be a (user) data radio bearer (DRB), or an E-UTRAN Radio Access Bearer (E-RAB); or the UE bearer, the UE session, the UE QoS flow and/or the UE service data flow may be a control plane UE bearer, a control plane UE session, a control plane UE QoS flow and/or a control plane UE service data flow, e.g., the UE bearer may be a signaling radio bearer (SRB) or a E-RAB.
  • SRB signaling radio bearer
  • the data forwarding address information associated with the UE may further be divided into the control plane data forwarding address information associated with the UE or the user plane data forwarding address information associated with the UE.
  • all bearers of the UE, all sessions of the UE, all QoS flows of the UE and/or all service data flows of the UE are respectively allocated with a corresponding data forwarding address, or only a UE bearer having the buffered data, a UE session having the buffered data, a UE QoS flow having the buffered data and/or a UE service data flow having the buffered data are allocated with corresponding data forwarding addresses, and a UE bearer not having the buffered data is allocated is not allocated with a corresponding data forwarding
  • the second radio access network node may allocate the corresponding UE-level data forwarding address, corresponding UE-session-level data forwarding address, corresponding UE-QoS-flow-level data forwarding address, corresponding UE-service-data-flow-level data forwarding address and/or the UE-bearer-level data forwarding address.
  • the second radio access network node may allocate the data forwarding address for the UE according to the obtained UE context. In some embodiments, regardless whether there is the buffered data of the UE, the second radio access network node allocates possible data forwarding addresses for all bearers of the UE acknowledged to be accepted, all sessions of the UE acknowledged to be accepted, all QoS flows of the UE acknowledged to be accepted, and/or all service data flows of the UE acknowledged to be accepted.
  • the second radio access network node may allocate at least one of the following data forwarding addresses: a UE-level data forwarding address, a UE-level control plane data forwarding address, a UE-level user plane data forwarding address, a data forwarding address of an accepted UE bearer, a data forwarding address of an accepted UE session, a data forwarding address of an accepted UE QoS flow and/or a data forwarding address of an accepted UE service data flow, a control plane data forwarding address of an accepted UE bearer, a control plane data forwarding address of an accepted UE session, a control plane data forwarding address of an accepted UE QoS flow and/or a control plane data forwarding address of an accepted UE service data flow, a user plane data forwarding address of an accepted UE bearer, a user plane data forwarding address of an accepted UE session, a user plane data forwarding address of an accepted UE QoS flow and/or a user plane data forwarding address of an accepted UE service data flow,
  • the second radio access network node transmits the data forwarding address information associated with the UE to the first radio access network node.
  • the second radio access network may forward the data forwarding address information associated with the UE to the first radio access network node through the core network node.
  • the data forwarding address information received by the first radio access network node is same with the data forwarding address information transmitted by the second radio access network node.
  • the first radio access network node may directly transmit the buffered data to the data forwarding address at the second radio access network node side.
  • the second radio access network node transmits the data forwarding address information associated with the UE to the core network node.
  • the core network node may allocate the corresponding data forwarding address at the core network side, and transmits the data forwarding address at the core network side to the first radio access network node.
  • the first radio access network node transmits the buffered data to the data forwarding address at the corresponding core network side, and the corresponding core network node forwards the buffered data to the data forwarding address at the second radio access network node side.
  • the node performing the data forwarding at the core network side may be a MME, AMF, SMF, UPF or a SGW.
  • the address information transmitted to the first radio access network node is the address information of the MME side, the AMF side, the SMF side, the UPF side or the SGW side.
  • the core network node may transmit the data forwarding address information associated with the UE through the UE context release command or the UE context suspend command (the data forwarding address information associated with the UE is as described in block 301).
  • FIG. 4 is a flowchart illustrating a third method for supporting data transmission.
  • a processing procedure of a core network node in data transmission is described in the procedure. As shown in FIG. 4, the procedure includes steps as follows.
  • the core network node receives first data forwarding address information associated with the UE and/or the data information associated with the UE.
  • the first data forwarding address information associated with the UE is the data forwarding address information associated with the UE transmitted from the second radio access network, as described in block 301.
  • the data information associated with the UE is described as that in block 202, which is not repeatedly described herein.
  • the core network node may obtain the first data forwarding address information associated with the UE from at least one of the following: the user plane node of the core network, the radio access network node, the radio access network node accessed by the UE, the UE, a target radio access network node in handover.
  • the core network node transmits the second data forwarding address information associated with the UE and/or the connection establishment control.
  • the second data forwarding address information associated with the UE may be the received first data forwarding address information associated with the UE, or may be the data forwarding address information associated with the UE at the core network side generated by the core network node one by one according to the received first data forwarding address information (detail content as described in block 202).
  • the second data forwarding address information associated with the UE is the data forwarding address information associated with the UE at the second radio access network node side.
  • the first radio access network node may directly forward the data to the second radio access network node.
  • the second data forwarding address information associated with the UE is the data forwarding address information associated with the UE at the core network node side (e.g., the data forwarding address information at the MME side, the AMF side, the UPF side and/or the SGW side).
  • the core network node when receiving the data information associated with the UE which acknowledges that there is the data forwarding requirement, allocates the data forwarding address of the UE at the core network node side (e.g., the user plane node of the core network allocates the user plane data forwarding address, the control plane node of the core network allocates the control plane data forwarding address).
  • the first radio access network node may transmit the data to the data forwarding address at the core network side.
  • the core network node may receive the data of the UE transmitted from the first radio access network node, and then transmits the received data to the second radio access network node.
  • the core network node may further perform at least one of the data forwarding control as follows:
  • the core network node may receive a request for releasing the UE context in the first radio access network node or related information (e.g., the data forwarding completion notification) from the first radio access network node or the second radio access network node. After receiving the request, the core network node may indicate the first radio access network node to release the UE context.
  • the data forwarding address information is transmitted to the first radio access network node, so as to ensure that the first radio access network node may transfer the data of the UE, and further to ensure service continuity.
  • the core network may determine the connection establishment control according to the received data information associated with the UE.
  • the connection establishment control may include at least one of the following:
  • the core network node determines to establish the UE context to the second radio access network node, with regard to that the data needs to be transmitted to the UE through the second radio access network node. 2) when making sure there is no data forwarding requirement of the UE, the core network node determines to only establish to the second radio access network node the control plane connection of the UE between the radio access network node and the core network.
  • the first radio access network node when the first radio access network node cannot reach the UE by means of paging, the first radio access network node triggers a process to the core network in order to releases or suspends UE context, when the data information associated with the UE transmitted from the first radio access network node to the core network node confirms that there is the data forwarding requirement, the core network node may initiate the core network level paging.
  • FIG. 5 is a flowchart illustrating a fourth method for supporting data transmission according to the present disclosure.
  • a processing procedure of the first radio access network node in the data transmission is described in the procedure.
  • the first radio access network node refers to an old radio access network node which stores the UE context, and its connection with a UE is disconnected, is a light connection, is inactive, or is suspended;
  • the second radio access network node refers to the radio access network node newly accessed by the UE.
  • the procedure includes steps as follows:
  • the first radio access network node obtains the data forwarding address information associated with the UE.
  • the data forwarding address information associated with the UE may be the data forwarding address of the UE at the second radio access network node side or the data forwarding address of the UE at the core network node (e.g., the MME, AMF, UPF and/or the SGW).
  • the core network node e.g., the MME, AMF, UPF and/or the SGW.
  • the data forwarding address information associated with the UE at the second radio access network node may be forwarded to the first radio access network node through the core network node (e.g., there is no interface between the first radio access network node and the second radio access network node), after receiving the data forwarding address information associated with the UE, the first radio access network node may directly forward it to the second radio access network node.
  • the core network node may transmit the data forwarding address information associated with the UE at the core network side to the first radio access network node. After receiving the data forwarding address information associated with the UE, the first radio access network node may forward the data to the core network node, and the core network node transmits the data to the second radio access network node.
  • the first radio access network node may obtain the data forwarding address information associated with the UE from the core network node from at least one of the following messages: a UE context releasing message, a new message.
  • the first radio access network node performs the data forwarding control according to the received data forwarding address information.
  • the first radio access network node forwards the buffered data according to the obtained data forwarding address information associated with the UE, i.e., transmitting the buffered data of the UE to the corresponding data forwarding address.
  • different buffered data is transmitted corresponding data forwarding addresses.
  • the UE-level data is transmitted to the UE-level data forwarding address
  • the UE-bearer-level data is transmitted to the UE-bearer-level data forwarding address
  • the UE-session-level data is transmitted to the UE-session-level data forwarding address
  • the UE-QoS-flow-level data is transmitted to the UE-QoS-flow-level data forwarding address
  • the UE-service-data-flow-level data is transmitted to the UE-service-data-flow-level data forwarding address
  • the control plane data of the UE is transmitted to the control plane data forwarding address of the UE
  • the user plane data of the UE is transmitted to the user plane data forwarding address of the UE
  • the uplink data of the UE is transmitted to the uplink data forwarding address of the UE
  • the downlink data of the UE is transmitted to the downlink data forwarding address of the UE.
  • the procedure may further include at least one of the following procedures:
  • the data forwarding completion information may be UE-level data forwarding completion information, UE-session-level data forwarding completion information, UE-QoS-flow-level data forwarding completion information, UE-service-data-flow-level data forwarding completion information or UE-bearer-level data forwarding completion information.
  • the data forwarding completion information may be further divided into control plane data forwarding completion information of the UE and user plane data forwarding completion information of the UE.
  • the data forwarding completion information may include at least one of the following: an indication of data forwarding completion, information of the UE bearer for which the data forwarding is completed (included content is as the information of the UE bearer described in block 202), information of the UE session for which the data forwarding is completed (included content is as the information of the UE session described in block 202), information of the UE QoS flow for which the data forwarding is completed (included content is as the information of the UE QoS flow described in block 202), information of the UE service data flow for which the data forwarding is completed (included content is as the information of the UE service data flow described in block 202), a category of the data for which the data forwarding is completed (included content is as the data category described in block 202), a direction of the data for which the data forwarding is completed (included content is as the data direction described in block 202).
  • the data forwarding completion information above may be represented as information that there is no data to be forwarded or there is no data buffered
  • the data category of the data for which the data forwarding is completed may be represented as the data category of the data of which none is forwarded or the data category of the data of which none is buffered.
  • the category of the data completely forwarded may be set as the control plane.
  • the first radio access network node transmits the data forwarding completion information to the core network node or the second radio access network node.
  • the first radio access network node requests the core network node or the second radio access network node to release the UE context.
  • FIG. 6 is a schematic diagram illustrating a data transmission supporting method according to a first embodiment of the present disclosure.
  • a new radio access network node i.e., a second radio access network node
  • obtains UE context from an old radio access network node i.e., a first radio access network node
  • the method includes procedure as follows.
  • the UE releases or suspends a RRC connection with the first radio access network node.
  • the UE establishes or recovers the RRC connection with the second radio access network node, which may be implemented through a RRC connection establishment process, a RRC connection resume process or a RRC connection re-establishment process.
  • the UE may establish the RRC connection when receiving paging for the UE, moving out of a paging range or having data to be transmitted.
  • the second radio access network node transmits a Retrieve UE context request message to the first radio access network node.
  • the first radio access network node transmits a Retrieve UE context response message to the second radio access network node.
  • the message includes the data information associated with the UE (as described in block 202).
  • the UE context response message includes the UE context.
  • the second radio access network node allocates the data forwarding address information according to the data information associated with the UE as described in block 301.
  • the second radio access network node may transmit the data forwarding address information to the first radio access network node. If there is no data forwarding requirement, directly enter block 611.
  • the first radio access network node performs data forwarding according to the data forwarding address allocated by the second radio access network node.
  • the second radio access network node transmits a path switching request message to the core network node.
  • a control node of the core network transmits a bearer modification request message to a user plane node of the core network.
  • the user plane node of the core network transmits a bearer modification response message to the control node of the core network.
  • the user plane node of the core network transmits an end marker packet to the first radio access network node.
  • the core network node transmits the path switching response message to the second radio access network node.
  • the first radio access network node releases the UE context, and transmits the UE context release response message to the second radio access network node.
  • the first radio access network node may notify to the second radio access network node there is no data forwarding requirement through two ways as follows:
  • the first radio access network node indicates in the data information associated with the UE that the data forwarding requirement information associated with the UE is that there is no buffered data of the UE.
  • the first radio access network node transmits the end marker packet to the received data forwarding address.
  • FIG. 7 is a schematic diagram illustrating a data transmission supporting method according to a second embodiment of the present disclosure.
  • a new radio access network node retrieves UE context from an old radio access network node through a handover retrieving process.
  • the method includes procedures as follows.
  • Blocks 701 and 702 are same as that described in blocks 601 and 602, which is not described repeatedly herein.
  • a UE releases or suspends a RRC connection with a first radio access network node.
  • the first radio access network node transmits a handover request message to a second radio access network.
  • the message includes the data information associated with the UE (as described in block 202).
  • the handover request message includes the UE context.
  • Blocks 706 to 714 are same with blocks 606 to 614, which is not repeatedly described herein.
  • FIG. 8 is a schematic diagram illustrating a data transmission supporting method according to a third embodiment of the present disclosure.
  • a connection of the UE When a connection of the UE is established, there is no interface between a new radio access network node (a second radio access network node) and an old radio access network node (a first radio access network node).
  • the new radio access network node obtains UE context through a core network node.
  • the method includes procedures as follows.
  • Blocks 801 and 802 are same with blocks 601 and 602, which is not described repeatedly herein.
  • the UE releases or suspends the RRC connection with the first radio access network node.
  • the second radio access network node transmits an initial UE message to the control node of the core network.
  • control node of the core network transmits an initial UE context establishment request message to the second radio access network node.
  • the second radio access network node performs RRC connection reconfiguration to the UE.
  • the second radio access network node transmits an initial UE context establishment response message to the control node of the core network.
  • the message includes the data forwarding address information associated with the UE (as described in block 302).
  • control node of the core network transmits the data forwarding address information associated with the UE (as described in block 402) to the first radio access network node.
  • the first radio access network node performs the data forwarding according to the received data forwarding address information (the detail operation is same as that described in block 502). When there is no data forwarding requirement, directly perform block 812.
  • control node of the core network transmits an E-RAB modification request message to the user plane node of the core network.
  • the user plane node of the core network transmits an E-RAB modification response message to the control node of the core network.
  • the user plane node of the core network transmits an end marker packet to the first radio access network node.
  • the first radio access network node transmits the end marker packet to the received data forwarding address.
  • the transmitted end marker packet may be 1) the end marker packet received from the user plane node of the core network; 2) or the end marker packet generated by the first radio access network node when there is no data to be forwarded in the first radio access network node.
  • the second radio access network node requests the control node of the core network to release the UE context in the first radio access network node according to the received end marker packet, as described in block 813.
  • the first radio access network node requests the release of the UE context to the control node of the core network, as described in block 814.
  • the control node of the core network transmits a UE context release command message to the first radio access network node.
  • the control node of the core network may request the first radio access network node to release the UE context according to the received data forwarding completion notification.
  • FIG. 9 is a schematic diagram illustrating a data transmission supporting method according to a fourth embodiment of the present disclosure.
  • a connection of the UE When a connection of the UE is established, there is no interface between a new radio access network node (a second radio access network node) and an old radio access network node (a first radio access network node).
  • the new radio access network node retrieves UE context from the old radio access network node through a context retrieving process.
  • the method includes procedures as follows.
  • Blocks 901 and 902 are same with blocks 601 and 602, which are not repeatedly described herein.
  • the UE releases or suspends a RRC connection with the first radio access network node.
  • the second radio access network node transmits a Retrieve UE context request message to the control node of the core network.
  • the message includes access information of the UE (as described in block 201).
  • the control node of the core network transmits the Retrieve UE context request message to the first radio access network node.
  • the message includes the access information of the UE (as described in block 201).
  • the first radio access network node transmits a Retrieve UE context response message to the control node of the core network.
  • the message includes data forwarding information associated with the UE (as described in block 202).
  • the second radio access network node performs RRC connection reconfiguration for the UE.
  • the second radio access network may configure the data forwarding address information associated with the UE according to the received data information associated with the UE, and the detail operation is as described in block 301.
  • the second radio access network node transmits the data forwarding address information associated with the UE to the control node of the core network (as described in block 302).
  • Blocks 909 to 918 are consistent with blocks 807 to 816, which are not repeatedly described herein.
  • FIG. 10 is a schematic diagram illustrating a data transmission supporting method according to a fifth embodiment of the present disclosure.
  • the new radio access network node retrieves UE context from the old radio access network node through the core network through a handover process.
  • the method includes procedures as follows.
  • Blocks 1001 and 1002 are same with blocks 601 and 602, which is not repeatedly described herein.
  • the UE releases or suspends a RRC connection with the first radio access network node.
  • the second radio access network node transmits an initial UE message to the control node of the core network.
  • the message includes the access information of the UE (as described in block 201).
  • control node of the core network transmits the access information of the UE to the first radio access network node (as described in block 201).
  • the first radio access network node transmits a handover request message to the control node of the core network.
  • the message includes the data forwarding information associated with the UE (as described in block 202).
  • the control node of the core network transmits the handover request message to the second radio access network node.
  • the message includes the data forwarding information associated with the UE (as described in block 202).
  • the second radio access network node performs RRC connection reconfiguration for the UE.
  • the second radio access network node transmits a handover response message to the control node of the core network.
  • the data forwarding address information associated with the UE is configured according to the received data information associated with the UE, and the detail operation is as described in block 301.
  • the second radio access network node transmits the data forwarding address information associated with the UE to the control node of the core network (as described in block 302).
  • the control node of the core network transmits the handover response message to the first radio access network node.
  • the message includes the data forwarding address information associated with the UE.
  • the second radio access network node transmits a handover complete notification to the control node of the core network.
  • the control node of the core network transmits a UE context release command message to the first radio access network node.
  • the control node of the core network requests the first radio access network node to release the UE context according to received data forwarding complete notification or the handover complete notification.
  • the first radio access network transmits the UE context release response message to the control node of the core network.
  • FIG. 11 is a schematic diagram illustrating a data transmission supporting method according to a sixth embodiment of the present disclosure.
  • a UE e.g., control plane data
  • an old radio access network node i.e., a first radio access network node
  • the first radio access network node directly transmits the buffered data to a new access network node (i.e., a new radio access network node), as described in block 1104;
  • the control node of the core network retransmits to the second radio access network node the data previously transmitted to the first radio access network node, as described in block 1108.
  • the method includes procedures as follows.
  • a RRC connection between the UE and the second radio access network node is established or recovered, which may be implemented through RRC connection establishment, RRC connection resume or RRC connection re-establishment.
  • the UE may establish the RRC connection when receiving paging for the UE, moving out a paging range, or having data to be transmitted.
  • the first radio access network node transmits a Retrieve UE context response message to the second radio access network node.
  • a control node of the core network transmits a bearer modification request message to a user plane node the core network.

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

Abstract

La présente invention porte sur un procédé de support de transmission de données, qui comprend l'obtention, par un premier noeud, d'informations d'accès d'un équipement utilisateur (EU); et la transmission, par le premier noeud, des informations de données associées à l'EU ou aux données de l'EU mises en mémoire tampon dans le premier noeud vers un second noeud de réseau d'accès radio auquel l'EU accède selon les informations d'accès. Selon la présente invention, les exigences de continuité de service dans l'autre réseau de communication mobile peuvent être efficacement adaptées.
PCT/KR2017/006669 2016-06-23 2017-06-23 Appareil et procédé de support de transmission de données WO2017222344A1 (fr)

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CN201710302321.0A CN107548127B (zh) 2016-06-23 2017-05-02 支持数据传输的方法和设备
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