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WO2018137666A1 - 一种数据传输方法、网络设备及终端设备 - Google Patents

一种数据传输方法、网络设备及终端设备 Download PDF

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Publication number
WO2018137666A1
WO2018137666A1 PCT/CN2018/074032 CN2018074032W WO2018137666A1 WO 2018137666 A1 WO2018137666 A1 WO 2018137666A1 CN 2018074032 W CN2018074032 W CN 2018074032W WO 2018137666 A1 WO2018137666 A1 WO 2018137666A1
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WO
WIPO (PCT)
Prior art keywords
network device
message
terminal device
network
data
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/074032
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English (en)
French (fr)
Inventor
晋英豪
杨阳
韩锋
杜颖钢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies 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.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP18745227.1A priority Critical patent/EP3562207B1/en
Publication of WO2018137666A1 publication Critical patent/WO2018137666A1/zh
Priority to US16/523,986 priority patent/US10979942B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a data transmission method, a network device, and a terminal device.
  • the terminal device moves away from the cell covered by the network device that originally served the terminal device to the cell covered by the new network device.
  • the prior art is to switch the terminal device from the cell covered by the original network device to the new network.
  • the cell coverage of the device requires the user to initiate an access request to the new network device.
  • the new network device obtains the context information of the terminal device from the original network device.
  • the new network device needs to perform path transfer with the core network device.
  • the signaling interaction between the network device and the core network is a waste of resources.
  • the present application provides a data transmission method, a network device, and a terminal device, to solve a large signaling caused by a handover when a terminal device in an RRC deactivated state moves to a coverage of a new network device and needs to transmit data. Overhead issues.
  • the application provides a data transmission method, including:
  • the first network device sends a first message to the second network device, where the first message is used to configure the second network device to enable the second network device to transmit data in the RRC deactivated state for the terminal device ;
  • the first network device receives an acknowledgement message of the first message sent by the second network device.
  • the first message includes: identifier information of the first network device, identifier information of the terminal device, and second network device transmits data in the RRC deactivated state of the terminal device.
  • the first message further includes one or any combination of the following: network slice information to which the bearer belongs, logical channel configuration information corresponding to the bearer, or a protocol corresponding to the bearer. Stack configuration information.
  • the acknowledgement message of the first message sent by the second network device includes: a bearer that the second network device can provide.
  • the acknowledgement message of the first message sent by the second network device further includes: address information on the Xn interface of the second network device that is corresponding to the bearer.
  • the first network device receives an acknowledgement message of the first message sent by the second network device, and further includes: the first network device sends a second message to the terminal device a message, the second message is used to indicate a second network device that can transmit data for the terminal device in an RRC deactivated state.
  • the second message includes identifier information of all second network devices that can send data for the terminal device in an RRC deactivated state.
  • the second message includes bitmap information of a radio access network-based notification area RNA of the first network device, where bitmap information of the RNA of the first network device is used to identify All second network devices capable of transmitting data in the RRC deactivated state of the terminal device within the RNA range of the first network device.
  • the second message includes indicator bit information, where the indicator bit information is used to indicate whether all second network devices in the RNA range of the first network device can be in the terminal device
  • the data is transmitted in the RRC deactivated state.
  • the second message further includes a bearer list, where the bearer list is used to indicate that the second network device that can transmit data for the terminal device in an RRC deactivated state can provide Hosted.
  • the first network device receives the confirmation message of the first message sent by the second network device, and further includes:
  • the first network device sends the received data packet transmitted by the second network device to the core network, where the data packet transmitted by the second network device is sent by the terminal device received by the second network device in an RRC deactivated state. data pack.
  • the first network device receives the confirmation message of the first message sent by the second network device, and further includes:
  • the first network device sends the data packet transmitted by the second network device that is received and processed by the protocol stack to the core network, where the protocol stack includes one or any combination of the following: a physical (PHY) layer, and media access control (MAC) layer, Radio Link Control (RLC) layer, or Packet Data Convergence Protocol (PDCP) layer.
  • PHY physical
  • MAC media access control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • the data packet sent by the terminal device in an RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the identifier information of the terminal device.
  • the indication field is used to indicate that the data packet includes a MAC CE field.
  • the application provides a data transmission method, including:
  • the second network device sends an acknowledgement message of the first message to the first network device.
  • the first message includes: identifier information of the first network device, identifier information of the terminal device, and second network device transmits data in the RRC deactivated state of the terminal device.
  • the first message further includes one or any combination of the following: network slice information to which the bearer belongs, logical channel configuration information corresponding to the bearer, or a protocol corresponding to the bearer. Stack configuration information.
  • the acknowledgement message of the first message includes: a bearer that the second network device can provide.
  • the acknowledgement message of the first message further includes: address information on the Xn interface of the second network device that is corresponding to the bearer.
  • the second network device sends an acknowledgement message of the first message to the first network device, and further includes:
  • the second network device sends the data packet to the first network device.
  • the second network device sends a confirmation message of the first message to the first network device, and further includes:
  • the second network device processes the data packet through a protocol stack, where the protocol stack includes one or any combination of the following: a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, Or the Packet Data Convergence Protocol (PDCP) layer;
  • a protocol stack includes one or any combination of the following: a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, Or the Packet Data Convergence Protocol (PDCP) layer;
  • PHY physical
  • MAC medium access control
  • RLC radio link control
  • PDCP Packet Data Convergence Protocol
  • the second network device sends the processed data packet to the first network device.
  • the data packet sent by the terminal device in an RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the identifier information of the terminal device.
  • the indication field is used to indicate that the data packet includes a MAC CE field.
  • the application provides a data transmission method, including:
  • the terminal device enters an RRC deactivated state
  • the terminal device sends a data packet to the second network device in an RRC deactivated state.
  • the method further includes: the terminal device receiving the first network And a second message sent by the device, where the second message is used to indicate a second network device that can transmit data for the terminal device in an RRC deactivated state.
  • the second message includes identifier information of all second network devices that can send data for the terminal device in an RRC deactivated state.
  • the second message includes bitmap information of an RNA of the first network device, and bitmap information of the RNA of the first network device is used to identify an RNA range of the first network device All second network devices capable of transmitting data in the RRC deactivated state for the terminal device.
  • the second message includes indicator bit information, where the indicator bit information is used to indicate whether all second network devices in the RNA range of the first network device can be in the terminal device
  • the data is transmitted in the RRC deactivated state.
  • the second message further includes a bearer list, where the bearer list is used to indicate that the second network device that can transmit data for the terminal device in an RRC deactivated state can provide Hosted.
  • the data packet includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store identifier information of the terminal device, where the indication field is used to indicate that the data packet includes MAC CE field.
  • the application provides a network device, including:
  • a processor configured to determine that the terminal device enters an RRC deactivated state
  • a transceiver configured to send a first message to the second network device, where the first message is configured to configure, by the second network device, the second network device to transmit data in the RRC deactivated state for the terminal device And receiving an acknowledgement message of the first message sent by the second network device.
  • the first message includes: identifier information of the network device, identifier information of the terminal device, and second network device needs to provide data for transmitting, by the terminal device in an RRC deactivated state.
  • the bearer and the address information carried on the Xn interface of the network device are possible implementations.
  • the first message further includes one or any combination of the following information: network slice information to which the bearer belongs, logical channel configuration information corresponding to the bearer, or a protocol corresponding to the bearer. Stack configuration information.
  • the acknowledgement message of the first message sent by the second network device includes: a bearer that the second network device can provide.
  • the acknowledgement message of the first message sent by the second network device further includes: address information on the Xn interface of the second network device that is corresponding to the bearer.
  • the transceiver is further configured to send a second message to the terminal device, where the second message is used to indicate that the terminal device can transmit data in an RRC deactivated state.
  • the transceiver is further configured to send a second message to the terminal device, where the second message is used to indicate that the terminal device can transmit data in an RRC deactivated state.
  • the second message includes identification information of all second network devices that can transmit data for the terminal device in an RRC deactivated state.
  • the second message includes bitmap information of an RNA of the first network device, and bitmap information of the RNA of the first network device is used to identify an RNA range of the first network device All second network devices capable of transmitting data in the RRC deactivated state for the terminal device.
  • the second message includes indicator bit information, where the indicator bit information is used to indicate whether all second network devices in the RNA range of the first network device can be in the terminal device
  • the data is transmitted in the RRC deactivated state.
  • the second message further includes a bearer list, where the bearer list is used to indicate that the second network device that can transmit data for the terminal device in an RRC deactivated state can provide Hosted.
  • the transceiver is further configured to receive a data packet transmitted by the second network device, and send the data packet to a core network, where the data packet transmitted by the second network device is a second network.
  • the transceiver is further configured to receive a data packet transmitted by the second network device
  • the processor is further configured to process, by the protocol stack, a data packet transmitted by the second network device, where the protocol stack includes one or any combination of the following: a physical (PHY) layer, a medium access control (MAC) layer, and a wireless chain. Road Control (RLC) layer, or Packet Data Convergence Protocol (PDCP) layer;
  • PHY physical
  • MAC medium access control
  • RLC Road Control
  • PDCP Packet Data Convergence Protocol
  • the transceiver is further configured to send the data packet transmitted by the second network device processed by the protocol stack to a core network.
  • the data packet sent by the terminal device in an RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the identifier information of the terminal device.
  • the indication field is used to indicate that the data packet includes a MAC CE field.
  • the application provides a network device, including:
  • a transceiver configured to receive a first message sent by the first network device, where the first message is used to configure the network device to enable the network device to transmit data in an RRC deactivated state for the terminal device; The first network device sends an acknowledgement message of the first message.
  • the first message includes: identifier information of the first network device, identifier information of the terminal device, and the network device transmits data in the RRC deactivated state of the terminal device.
  • the first message further includes one or any combination of the following information: network slice information to which the bearer belongs, logical channel configuration information corresponding to the bearer, or a protocol corresponding to the bearer. Stack configuration information.
  • the acknowledgement message of the first message includes: a bearer that the network device can provide.
  • the acknowledgement message of the first message further includes: address information on the Xn interface of the network device corresponding to the bearer.
  • the transceiver is further configured to receive a data packet sent by the terminal device in an RRC deactivated state; and forward the data packet directly to the first network device.
  • the transceiver is further configured to receive a data packet that is sent by the terminal device in an RRC deactivated state
  • the network device further includes a processor, configured to process the data packet through a protocol stack, where the protocol stack includes one or any combination of the following: a physical (PHY) layer, a medium access control (MAC) layer, and a wireless chain. Road Control (RLC) layer, or Packet Data Convergence Protocol (PDCP) layer;
  • PHY physical
  • MAC medium access control
  • RLC Road Control
  • PDCP Packet Data Convergence Protocol
  • the transceiver is further configured to send the data packet processed by the protocol stack to the first network device.
  • the data packet sent by the terminal device in an RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the identifier information of the terminal device.
  • the indication field is used to indicate that the data packet includes a MAC CE field.
  • the application provides a terminal device, including:
  • a processor configured to control the terminal device to enter an RRC deactivated state
  • a transceiver configured to send a data packet to the second network device in an RRC deactivated state.
  • the transceiver is further configured to receive a second message sent by the first network device, where the second message is used to indicate that the terminal device can transmit data in an RRC deactivated state.
  • Two network devices Two network devices.
  • the second message includes identifier information of all second network devices that can send data for the terminal device in an RRC deactivated state.
  • the second message includes bitmap information of an RNA of the first network device, and bitmap information of the RNA of the first network device is used to identify an RNA range of the first network device All second network devices capable of transmitting data in the RRC deactivated state for the terminal device.
  • the second message includes indicator bit information, where the indicator bit information is used to indicate whether all second network devices in the RNA range of the first network device can be in the terminal device
  • the data is transmitted in the RRC deactivated state.
  • the second message further includes a bearer list, where the bearer list is used to indicate that the second network device that can transmit data for the terminal device in an RRC deactivated state can provide Hosted.
  • the data packet includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store identifier information of the terminal device, where the indication field is used to indicate that the data packet includes MAC CE field.
  • the method of the present application if the first network device determines that the terminal device enters the RRC deactivation state, sends the configuration second network device to the second network device, so that the second network device can transmit the terminal device in the RRC deactivated state. a first message of the data, thereby establishing a data transmission path with the second network device; when the second network device receives the data packet sent by the terminal device, sending the data packet to the first network through the data transmission path The device, so that the first network device sends the data packet to the core network; thereby reducing the signaling overhead of the terminal device moving to the second network device coverage and requiring transmission of data to the core network.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2 is a schematic diagram of another application scenario of the embodiment of the present application.
  • FIG. 3 is a schematic diagram of still another application scenario of the embodiment of the present application.
  • FIG. 4 is a flow chart of a method for data transmission in an embodiment of the present application.
  • FIG. 5 is another flow chart of a method for data transmission according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a network device 600 according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a network device 700 according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a terminal device 800 according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • UMTS general mobile communication system
  • the terminal device in the embodiment of the present application may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a terminal device, a remote station, a remote terminal, a mobile device, and a user terminal.
  • UE User Equipment
  • terminal wireless communication device, user agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SIP") phone, a Wireless Local Loop (WLL) station, or a personal digital assistant (Personal Digital Assistant, Referred to as "PDA”), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a future evolved public land mobile communication network ( Terminal devices in the Public Land Mobile Network (PLMN).
  • PLMN Public Land Mobile Network
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, where the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station in a WCDMA system.
  • BTS Base Transceiver Station
  • the NodeB (abbreviated as “NB”) may also be an evolved base station (Evolutional NodeB, hereinafter referred to as “eNB or eNodeB”) in the LTE system, or may be a cloud radio access network (CRAN) scenario.
  • eNB evolved base station
  • CRAN cloud radio access network
  • the underlying wireless controller, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network.
  • the radio resource control RRC deactivation state mentioned in the embodiment of the present application is a state in which the terminal device is in the 5G network.
  • RRC connected state for a terminal device, there are three states in the 5G network: RRC connected state, RRC deactivated state, and idle state.
  • the RRC connected state and the idle state are similar to those in the LTE system, and are not described here, RRC deactivated.
  • the state is a state unique to the terminal device in the 5G network. When the terminal device is in the RRC deactivated state, it has the following characteristics:
  • the terminal device does not have data transmission on the air interface, the user RRC context information of the terminal device remains on the RAN side, and the RAN side reserves the connection with the core network for the RRC deactivated terminal device.
  • the terminal device in the RRC deactivated state can directly send the uplink small data packet without transferring to the RRC connected state by establishing RRC signaling.
  • the RRC deactivation state of the terminal device is a state between the RRC connected state and the idle state.
  • the terminal device can achieve power saving effect in the RRC deactivated state; when it needs to exchange data with the RAN side, it does not need to transfer to the RRC connected state, and can directly send/receive data, and the RAN side can also directly send data to the core.
  • the network receives/receives data from the core network because the RAN side reserves the connection with the core network for the RRC deactivated terminal device.
  • FIG. 1 An application scenario of the embodiment of the present application is as shown in FIG. 1 .
  • the scenario includes: a first network device, at least one second network device, and a terminal device, where the first network device may be Anchor New Radio ("ANR") 101, and the second network device may be Assitant New Radio (referred to as " SNR") 102, the terminal device may be the UE 103, and there is a wired connection between the ANR 101 and the SNR 102.
  • ANR Anchor New Radio
  • SNR Assitant New Radio
  • the UE 103 is currently in the Cell1 covered by the ANR 101, and the UE 103 is in a mobile state, and will move from the Cell 1 covered by the ANR 101 to the Cell 2 covered by the SNR 102.
  • FIG. 2 Another application scenario of the embodiment of the present application is as shown in FIG. 2 .
  • the scenario includes: a Central Unit (“CU") 201, an Anchor Distribute Unit (ADU) 202, an Assitant Distribute Unit (SDU) 203, and a UE 204, CU201. Control ADU 202 and SDU 203.
  • the UE 204 is currently in the Cell 1 covered by the ADU 202.
  • the UE 204 is in a mobile state and will move from the Cell 1 covered by the ADU 202 to the Cell 2 covered by the SDU 203.
  • FIG. 3 Another application scenario of the embodiment of the present application is as shown in FIG. 3 .
  • the scenario includes: an Anchor Central Unit (ACU) 301, an Assitant Central Unit (SCU) 302, and an Anchor Distribute Unit (ADU) 303.
  • Assitant Distribute Unit (SDU) 304 and UE 305 ACU 301 controls ADU 303, SCU 302 controls SDU 304, and there is a wired connection between ACU 301 and SCU 302.
  • the UE 305 is currently in the Cell 1 covered by the ADU 303.
  • the UE 305 is in a mobile state and will move from the Cell 1 covered by the ADU 303 to the Cell 2 covered by the SDU 304.
  • the first network device may send the first message to the adjacent multiple network devices, where the second network device is only a proxy and is not limited to a network device.
  • network device described in this application refers to an access network device.
  • a method for data transmission includes:
  • the first network device determines that the terminal device enters an RRC deactivation state.
  • the terminal device enters an RRC deactivated state from the RRC connected state under the coverage of the first network device. It can be seen from the characteristics of the RRC deactivation state of the terminal device that the first network device and the core network reserve at least one data plane connection of the terminal device.
  • the terminal device enters an RRC deactivated state from the RRC connected state, and the first network device determines that the terminal device enters an RRC deactivated state.
  • the determining, by the first network device, that the terminal device enters the RRC deactivation state comprises: the first network device determines that the terminal device is about to enter the RRC deactivation state, or the first network device determines that the terminal device has entered the RRC deactivation state.
  • the first network device determines that the terminal device is about to enter the RRC deactivation state. Specifically, the first network device may decide to allow the terminal device to enter the RRC deactivated state from the RRC connected state according to the service condition of the terminal device. For example, if it is detected that no service occurs in the terminal device for a period of time, for example, there is no uplink and downlink data transmission, the terminal device can be allowed to enter the RRC deactivated state from the RRC connected state, thereby achieving the power saving effect.
  • the first network device Determining, by the first network device, that the terminal device has entered the RRC deactivation state, in particular, the first network device has previously transferred the terminal device from the RRC connected state to the RRC deactivated state by using RRC signaling, the RRC message
  • the order may be state transfer signaling or other RRC signaling.
  • the first network device sends a first message to the second network device, where the first message is used to configure the second network device, so that the second network device can be in the RRC deactivated state of the terminal device. transfer data.
  • the terminal device shifts state under the coverage of the first network device, and enters an RRC deactivated state from the RRC connected state.
  • the first network device detects that the state of the terminal device is transferred, the first network device sends a first message to the neighboring multiple network devices, where the purpose of the first message is to configure the second network device, so that When the terminal device in the RRC deactivated state moves from the coverage of the first network device to the coverage of the second network device and needs to transmit data, the second network device may forward the data sent to the terminal device to The first network device.
  • the first network device sends the first message to the first network device, where the first message sent by the first network device includes: the identifier information of the first network device, the identifier information of the terminal device, and the second network device.
  • the second network device is a bearer that needs to be provided by the terminal device to transmit data in an RRC deactivated state, and may refer to a bearer of the terminal device on the first network device.
  • the terminal device has five bearers (bearer A, bearer B, bearer C, bearer D, and bearer E) on the first network device, and the first network device may consider that the second network device needs to provide the five bearers (bearer A) , bearer B, bearer C, bearer D, bear E).
  • the first network device considers that the second network device only needs to provide three of the bearers (bearer A, bearer B, and bearer C) to complete the transmission of data.
  • the first message sent by the first network device is second.
  • the network device is a bearer that needs to be provided by the terminal device to transmit data in the RRC deactivated state, that is, the three bearers (bearer A, bearer B, and bearer C).
  • the address information carried on the interface of the first network device Xn is used to instruct the second network device to send the data of the corresponding bearer to the corresponding address of the interface of the first network device Xn.
  • the Xn interface refers to an interface between base stations (gNBs)/cells in a fifth generation communication system.
  • the identifier information of the terminal device may be uniquely indicated to the terminal device in the RAN Notification Area, and may be one or a combination of the following forms: C-RNTI (Cellular Radio Network Temporary Identity, allocated by the base station to the UE) a dynamic identifier that uniquely identifies a UE under a cell air interface, and the first network device is an identifier in a third state that is allocated by the terminal device, and the identifier may be in the form of a C-RNTI+first network device identifier, or It is a separate form of C-RNTI.
  • C-RNTI Cellular Radio Network Temporary Identity, allocated by the base station to the UE
  • a dynamic identifier that uniquely identifies a UE under a cell air interface
  • the first network device is an identifier in a third state that is allocated by the terminal device
  • the identifier may be in the form of a C-RNTI+first network device identifier, or It is a separate form of C-RNTI
  • the identifier of the first network device may be at least one of the following forms: a physical layer cell identifier, a global cell identifier, and a gNB UE XnAP ID (the Xn interface on the first network device uniquely indicates the ID of the user).
  • the first message may include: network slice information to which the bearer belongs, and/or logical channel configuration information corresponding to the bearer, and/or protocol stack configuration information corresponding to the bearer.
  • the configuration information of the protocol stack may be configuration information of a specific protocol stack parameter and/or function, or may be an indication information, where the indication information is used to indicate that the second network device is configured according to the specified parameters and/or functions. Configuration.
  • the logical channel configuration information may be configuration information of a specific logical channel parameter and/or function, or may be an indication information, where the indication information is used to indicate that the second network device is configured according to the specified parameters and/or functions. Configuration.
  • the second network device sends an acknowledgement message of the first message to the first network device.
  • the second network device sends an acknowledgement message of the first message, and there are two mechanisms:
  • the first mechanism the second network device sends the bearer that can be provided by itself to the first network device.
  • the second network device may also send the address information on the interface of the second network device Xn corresponding to the bearer that can be provided by itself to the first network device.
  • the bearer that the second network device needs to provide for the terminal device to transmit data in the RRC deactivated state includes five bearers (bearer A, bearer B, Bearer C, bearer D, bear E).
  • the second network device determines that only three bearers (for example, bearer A, bearer B, and bearer E) can be provided according to the scheduling situation of the resource. Therefore, in this case, the second network device sends an acknowledgement message of the first message, where the acknowledgement message of the first message includes three bearers (bearer A, bearer B, and bearer E) that the second network device can provide.
  • the second network device may send the address information on the interface of the second network device Xn corresponding to the three bearers (bearer A, bearer B, and bearer E) to the first network device.
  • the second mechanism the second network device sends an acknowledgement message to the first network device according to the resource scheduling situation of the second network device if all the required bearers in the first message in the S11 are provided. Further, the second network device sends the address information on the second network device Xn interface corresponding to the required bearer in the first message to the first network device.
  • the second network device fails to provide all the required bearers in the first message in S11, the second network device rejects the request of the first network device, in this case,
  • the confirmation message of the first message sent by the network device includes the rejection information.
  • the second network device if the terminal device in the RRC deactivated state moves from the coverage of the first network device to the coverage of the second network device and needs to send data to the second network device, the second network device identifies The terminal device and the bearer to which the data sent by the terminal device belongs, according to the address information of the first network device Xn interface carried in the first message, the data is sent to the first network device, so that the first network device The data is sent to the core network.
  • the second network device transmits the data of the terminal device to the first network device, so that the first network device sends the data to the core network, and does not need to establish a path between the second network device and the core network.
  • the second network device sends the data to the core network, thereby reducing the signaling overhead of the terminal device transmitting the data to the core network.
  • a method for data transmission includes:
  • the first network device determines that the terminal device enters an RRC deactivation state.
  • the first network device sends a first message to the second network device, where the first message is used to configure the second network device to enable the second network device to transmit in the RRC deactivated state. data.
  • the second network device sends an acknowledgement message of the first message to the first network device.
  • the first network device sends a second message to the terminal device, where the second message is used to indicate a second network device that can transmit data for the terminal device in an RRC deactivated state.
  • the first network device sends, according to the received acknowledgement message of the first message, a second message to the terminal device, where the second message indicates a second network device that can transmit data for the terminal device in the RRC deactivated state.
  • the second message may take a variety of forms, for example, a list of identification information of the second network device capable of transmitting data for the terminal device; again, for example, bitmap information of the RNA of the first network device; and, for example, indicator bit information.
  • the second message includes a list of identification information of the second network device capable of transmitting data for the terminal device, and the second network device in the list can relay data for the terminal device.
  • the second message includes bitmap information of the RNA of the first network device, specifically, the first network device is bitmap information of the RNA (RAN Notification Area) allocated by the terminal in the RRC deactivated state, the bitmap The information is used to identify all second network devices capable of relaying data for the terminal device within the range of RNA allocated by the first network device for the terminal in the RRC deactivated state.
  • RNA RAN Notification Area
  • the first network device is an RNA allocated by the terminal in an RRC deactivated state, and refers to a notification area (RAN based notification area, RNA) of the radio access network of the terminal configured by the first network device to the terminal device in an Inactive state. ).
  • the RNA comprises one or more cells. When the terminal device reselects to other cells in the RNA range in the Inactive state, the network may not be notified, and when the terminal device reselects a cell outside the RNA range, the network needs to be notified.
  • the bitmap information is a multi-bit string.
  • the number of bits in the string can be the same as the number of cells in the RNA cell list, or it can be a fixed number of bits.
  • Each bit in the bitmap information indicates whether the corresponding cell in the RNA cell list (RNA cell list refers to the cell included in the RNA) supports the terminal device to transmit data under Inactive, for example, the cells included in the RNA cell list are: cell# 1.
  • the bitmap information includes at least 4 bits, and 0 in the bitmap information indicates that the cell does not support the terminal device to transmit data under Inactive, and 1 supports, then the bitmap If it is 0101, it means that cell #2 and cell #6 support the terminal device to transmit data under Inactive, while cell #1 and cell #4 do not. It is worth noting that the bitmap information can also exceed 4 bits.
  • the bitmap information is fixed to 16 bits. If only four cells are added to the RNA, it means that 4 of the 16 bits can be specified. The bit represents whether the cell in the RNA supports the terminal device to transmit data under Inactive (for example, the first 4 bits), and the other 12 bits can be padded to 0. If the RNA has 6 cells, it can be specified that 6 bits represent whether the cell in the RNA supports the terminal device to transmit data under Inactive (for example, the first 6 bits), and the other 10 bits can be padded to 0.
  • cell #1 and cell #4 are cells covered by the second network device A
  • cell #2 and cell #6 are cells covered by the second network device B.
  • the second message includes the indication bit information, where the indication bit information is used to indicate whether all the second network devices in the RNA range of the first network device can send data for the terminal device in the Inactive state
  • the RNA of the first network device refers to the RNA that the first network device allocates for the terminal in the RRC deactivated state.
  • the indication bit information is represented by 1 bit. For example, if the bit is 1, it means that all the second network devices in the RNA range of the first network device can send data for the terminal device in the Inactive state. If the bit is 0, It means that not all the second network devices in the RNA range of the first network device can send data for the terminal device in the Inactive state.
  • the second message may further indicate, according to the second network device that can transmit data for the terminal device in the RRC deactivated state, further indicating that the second network device capable of relaying data can provide the second network device. Hosted.
  • the second network device indicated in the second message includes the second network device A, the second network device B, and the second network device C, where the bearer that the second network device A can provide includes bearer 1, bearer 3, and bearer.
  • the bearer that the second network device B can provide includes the bearer 2 and the bearer 4; and the bearer that the second network device C can provide includes the bearer 3 and the bearer 5.
  • the second message includes a bearer list of the second network device capable of transmitting data for the terminal device in the RRC deactivated state, as shown in the following table:
  • the second network device indicated in the second message includes the second network device A, the second network device B, and the second network device C, where the bearer that the second network device A can provide includes the bearer 1, the bearer 3
  • the bearer provided by the second network device B includes the bearer 2 and the bearer 4; the bearer that the second network device C can provide includes the bearer 3 and the bearer 5.
  • the minimum set may be selected, that is, the bitmap information indicates that only the second network device A and the second network device B can transmit data for the terminal in the RRC deactivation state, and the bearers that can be provided are the bearer 3 and the bearer 5.
  • the terminal device sends a data packet to the second network device in an RRC deactivated state.
  • the terminal device sends the uplink signal and the uplink scheduling resource through the random access procedure to obtain the uplink synchronization and/or the uplink scheduling resource, and then sends the uplink data packet to the second network device, or has no access procedure, and directly adopts the contention-based resource or the reservation.
  • the resource sends a packet to the second network device (ie Grant free mode).
  • the data packet sent by the terminal device in the RRC deactivated state is a small data packet, and is generally a data packet smaller than a preset threshold size.
  • the terminal device does not need to establish an RRC connection to transfer the terminal device state to the RRC connected state and then send the small data packet, and the terminal device directly sends the small data packet in the RRC deactivated state.
  • the method of the present application solves the problem of how to send uplink small data packets to the core network when the terminal device in the RRC deactivated state moves from the coverage of the first network device to the coverage of the second network device.
  • the data packet sent by the terminal device in the RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store identification information of the terminal device, and the indication field is used to indicate the data packet. Contains the MAC CE field. The application does not limit the location of the indication field, the data field, and the MAC CE field.
  • the terminal device packages and generates data to be sent at the MAC layer, and the terminal device generates a data packet to be sent at the MAC layer, where the data packet includes an indication field, a data field, and a MAC CE field, where the MAC CE field is new. Field for storing identification information of the terminal device.
  • the second network device can parse the identification information of the terminal device at the MAC layer, so as to quickly know which terminal device the data packet comes from.
  • the second network device sends the received data packet to the first network device, so that the first network device sends the data packet to the core network.
  • the second network device sends the received data packet to the first network device in two ways:
  • the second network device receives and directly forwards the data packet sent by the terminal device in an RRC deactivated state.
  • the second network device receives the data packet sent by the terminal device in the RRC deactivated state, and sends the data packet to the first network device after being processed by the protocol stack, where the protocol stack includes one or any combination of the following: (PHY) layer, Medium Access Control (MAC) layer, Radio Link Control (RLC) layer, or Packet Data Convergence Protocol (PDCP) layer.
  • PHY Physical Layer
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • the first network device sends the data packet to the core network. There are also two ways:
  • the first network device receives and directly forwards the data packet sent by the second network device.
  • the first network device receives the data packet sent by the second network device, and sends the data packet to the core network after being processed by the protocol stack, where the protocol stack includes one or any combination of the following: physical (PHY) layer, media access Control (MAC) layer, Radio Link Control (RLC) layer, or Packet Data Convergence Protocol (PDCP) layer.
  • PHY physical
  • MAC media access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • the second network device transmits the data of the terminal device to the first network device, so that the first network device sends the data to the core network, and does not need to establish a path between the second network device and the core network.
  • the second network device sends the data to the core network, thereby reducing the signaling overhead of the data transmitted by the terminal device to the core network.
  • Embodiment 1 and Embodiment 2 are applicable to the three application scenarios mentioned in this application.
  • the first network device is a primary network device ANR 101
  • the second network device is a secondary network device SNR 102 .
  • the first network device is a central unit CU201
  • the second network device is a secondary distribution unit SDU203, wherein the central unit CU201 controls the secondary distribution unit SDU203.
  • the first network device is the primary central unit ACU301
  • the second network device is the secondary central unit SCU302
  • the primary central unit ACU301 controls the primary distribution unit ADU303
  • the secondary central unit SCU302 controls Auxiliary distribution unit SDU304, wherein
  • the first network device sends the first message to the second network device, including:
  • the primary central unit ACU 301 sends a first message to the secondary central unit SCU 302 to cause the secondary central unit SCU 302 to transmit the first message to the secondary distribution unit SDU 304.
  • the primary central unit ACU 301 receives the acknowledgement message of the first message sent by the secondary distribution unit SDU 304 through the secondary central unit SCU 302, and the acknowledgement message of the first message is sent by the secondary distribution unit SDU 304 to the received secondary central unit SCU302.
  • the first message was made.
  • the data transmission method of the embodiment of the present application is described in detail above, and the network device and the terminal device of the embodiment of the present application are described below. It should be understood that the network device and the terminal device in the embodiments of the present application may perform the data transmission method in the foregoing embodiment, that is, the specific working processes of the following two network devices and the specific working process of the terminal device, and may refer to the corresponding method in the foregoing embodiment. process.
  • FIG. 6 shows a schematic block diagram of a network device 600 of an embodiment of the present application.
  • the network device 600 can be the first network device in the foregoing method embodiments.
  • a network device 600 includes:
  • the processor 601 is configured to determine that the terminal device enters an RRC deactivated state.
  • the transceiver 602 is configured to send a first message to the second network device, where the first message is used to configure the second network device to enable the second network device to transmit in the RRC deactivated state Data; and receiving an acknowledgement message of the first message sent by the second network device.
  • the first message includes: identifier information of the network device, identifier information of the terminal device, a bearer that the second network device needs to provide for transmitting data by the terminal device in an RRC deactivated state, and the Address information carried on the Xn interface of the network device.
  • the first message further includes one or any combination of the following information: network slice information to which the bearer belongs, logical channel configuration information corresponding to the bearer, or protocol stack configuration information corresponding to the bearer.
  • the acknowledgement message of the first message sent by the second network device includes: a bearer that the second network device can provide.
  • the confirmation message of the first message sent by the second network device further includes: the address information on the Xn interface of the second network device corresponding to the bearer.
  • the transceiver 602 is further configured to send, to the terminal device, a second message, where the second message is used to indicate a second network that can transmit data for the terminal device in an RRC deactivated state. device.
  • the second message includes identifier information of all second network devices that can send data for the terminal device in an RRC deactivated state; optionally, the second message includes a bit of the RNA of the first network device.
  • the map information, the bitmap information of the RNA of the first network device is used to identify all second network devices that can send data for the terminal device in an RRC deactivated state within the RNA range of the first network device.
  • the second message includes indicator bit information, where the indicator bit information is used to indicate whether all second network devices in the RNA range of the first network device can be in the RRC deactivated state for the terminal device. send data.
  • the second message further includes a bearer list, where the bearer list is used to indicate the bearer that can be provided by the second network device that can transmit data in the RRC deactivated state of the terminal device.
  • the transceiver 602 is further configured to receive a data packet transmitted by the second network device, and send the data packet to a core network, where the data packet transmitted by the second network device is a second The data packet sent by the terminal device in the RRC deactivated state and the data packet sent by the terminal device that is processed by the second network device and processed by the protocol stack in the RRC deactivated state.
  • the transceiver 602 is further configured to receive the data packet transmitted by the second network device, where the data packet transmitted by the second network device is received by the second network device and directly forwarded by the second network device. a data packet sent by the terminal device in an RRC deactivated state or a data packet sent by the second network device and processed by the terminal device in an RRC deactivated state; the processor 601 is further configured to go through a protocol stack.
  • the protocol stack comprising one or any combination of the following: a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, or packet data a convergence protocol (PDCP) layer; the transceiver 602 is further configured to send the data packet transmitted by the second network device processed by the protocol stack to the core network.
  • PHY physical
  • MAC medium access control
  • RLC radio link control
  • PDCP packet data a convergence protocol
  • the data packet sent by the terminal device in the RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the terminal. Identification information of the device, the indication field is used to indicate that the data packet includes a MAC CE field.
  • the network device 600 of the embodiment of the present application may correspond to the first network device in the method of the embodiment of the present application, and the foregoing operations and/or functions of the respective modules in the network device 600 are respectively implemented in order to implement the corresponding processes of the foregoing methods. For the sake of brevity, it will not be repeated here.
  • FIG. 7 shows a schematic block diagram of a network device 700 of an embodiment of the present application.
  • the network device 700 can be the second network device in the foregoing method embodiment.
  • a network device 700 includes:
  • the transceiver 701 is configured to receive a first message sent by the first network device, where the first message is used to configure the network device to enable the network device to transmit data in an RRC deactivated state for the terminal device; Sending an acknowledgement message of the first message to the first network device.
  • the first message includes: identifier information of the first network device, identifier information of the terminal device, a bearer that the network device needs to provide for transmitting data by the terminal device in an RRC deactivated state, and the Address information carried on the Xn interface of the first network device.
  • the first message further includes one or any combination of the following information: network slice information to which the bearer belongs, logical channel configuration information corresponding to the bearer, or protocol stack configuration information corresponding to the bearer.
  • the confirmation message of the first message includes: a bearer that the network device can provide.
  • the confirmation message of the first message further includes: address information on the Xn interface of the network device corresponding to the bearer.
  • the transceiver 701 is further configured to receive a data packet sent by the terminal device in an RRC deactivated state; and forward the data packet directly to the first network device.
  • the transceiver 701 is further configured to receive a data packet sent by the terminal device in an RRC deactivated state, where the terminal device further includes a processor 702, configured to process, by using a protocol stack a data packet, the protocol stack comprising one or any combination of the following: a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer;
  • the transceiver 701 is further configured to send the processed data packet to the first network device.
  • the data packet sent by the terminal device in the RRC deactivated state includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the identifier of the terminal device.
  • the indication field is used to indicate that the data packet includes a MAC CE field.
  • the network device 700 of the embodiment of the present application may correspond to the second network device in the method of the embodiment of the present application, and the foregoing and other operations and/or functions of the respective modules in the network device 700 are respectively implemented to implement the corresponding processes of the foregoing methods. For the sake of brevity, it will not be repeated here.
  • FIG. 8 shows a schematic block diagram of a terminal device 800 of an embodiment of the present application.
  • the terminal device 800 can be the terminal device in the foregoing method embodiment.
  • a terminal device 800 includes:
  • the processor 801 is configured to control the terminal device 800 to enter an RRC deactivated state.
  • the transceiver 802 is configured to send a data packet to the second network device in an RRC deactivated state.
  • the data packet includes an indication field, a data field, and a MAC CE field, where the MAC CE field is used to store the identifier information of the terminal device, and the indication field is used to indicate that the data packet includes a MAC CE field.
  • the transceiver 802 is further configured to receive a second message sent by the first network device, where the second message is used to indicate that the terminal device can transmit data in an RRC deactivated state. Second network device.
  • the second message includes identifier information of all second network devices that can send data for the terminal device in an RRC deactivated state; optionally, the second message includes the first network device.
  • Bitmap information of the RNA of the first network device the bitmap information of the RNA of the first network device is used to identify all the data that can be transmitted in the RRC deactivated state of the terminal device within the RNA range of the first network device a second network device; optionally, the second message includes indicator bit information, where the indicator bit information is used to indicate whether all second network devices in the RNA range of the first network device can be the terminal device Transmitting data in an RRC deactivated state; optionally, the second message further includes a bearer list, where the bearer list is used to indicate the second network that can transmit data for the terminal device in an RRC deactivated state The load that the device can provide.
  • the terminal device 800 of the embodiment of the present application may correspond to the terminal device in the method of the embodiment of the present application, and the foregoing operations and/or functions of the respective modules in the terminal device 800 are respectively implemented in order to implement the corresponding processes of the foregoing methods. , will not repeat them here.
  • the term "and/or” is merely an association relationship describing an associated object, indicating that there may be three relationships.
  • a and/or B may indicate that A exists separately, and A and B exist simultaneously, and B cases exist alone.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本申请涉及通信技术领域，尤其涉及一种数据传输的方法及网络设备。本申请所述的方法，包括：第一网络设备确定终端设备进入RRC去激活态；第一网络设备向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据；第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息。本申请，第二网络设备将终端设备的数据传输给第一网络设备以使第一网络设备将数据发送至核心网，而不需要第二网络设备与核心网之间建立路径以使第二网络设备将数据发送至核心网，以此减小了终端设备发送数据至核心网整个过程中的信令开销。

Description

一种数据传输方法、网络设备及终端设备
本申请要求于2017年1月26日提交中国专利局、申请号为201710061847.4、申请名称为“一种数据传输方法、网络设备及终端设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种数据传输方法、网络设备及终端设备。
背景技术
终端设备在移动的过程中会远离原来为该终端设备服务的网络设备覆盖的小区，到达新的网络设备覆盖的小区，现有技术是将终端设备从原来网络设备覆盖的小区切换到新的网络设备覆盖的小区，切换的过程需要用户向新的网络设备发起接入请求，新的网络设备从原来的网络设备获取终端设备的上下文信息，新的网络设备需要与核心网设备进行路径转移，增加了网络设备与核心网之间的信令交互，资源浪费较大。
发明内容
本申请提供一种数据传输方法、网络设备及终端设备，以解决RRC去激活态的终端设备在移动到新的网络设备的覆盖范围且需要传输数据时，由于切换带来的较大的信令开销问题。
第一方面，本申请提供一种数据传输方法，包括：
第一网络设备确定终端设备进入无线资源控制RRC去激活态；
第一网络设备向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备可以为所述终端设备在RRC去激活态下传输数据；
第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息。
在一些可能的实现方式中，所述第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述第一消息还包括下述信息之一或者任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
在一些可能的实现方式中，所述第二网络设备发送的所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。
在一些可能的实现方式中，所述第二网络设备发送的所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，之后还包括：所述第一网络设备向所述终端设备发送第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
在一些可能的实现方式中，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息。
在一些可能的实现方式中，所述第二消息包含第一网络设备的基于无线接入网的通知区域RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
在一些可能的实现方式中，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
在一些可能的实现方式中，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
在一些可能的实现方式中，所述第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，之后还包括：
第一网络设备将接收到的第二网络设备传输的数据包发送至核心网，其中，第二网络设备传输的数据包为第二网络设备接收的所述终端设备在RRC去激活态下发送的数据包。
在一些可能的实现方式中，所述第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，之后还包括：
第一网络设备将接收并经过协议栈处理后的第二网络设备传输的数据包发送至核心网，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层。
在一些可能的实现方式中，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
第二方面，本申请提供一种数据传输方法，包括：
第二网络设备接收第一网络设备发送的第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据；
第二网络设备向第一网络设备发送所述第一消息的确认消息。
在一些可能的实现方式中，所述第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述第一消息还包括下述信息之一或者任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
在一些可能的实现方式中，所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。
在一些可能的实现方式中，所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述第二网络设备向第一网络设备发送所述第一消息的确认消息，之后还包括：
第二网络设备接收所述终端设备在RRC去激活态下发送的数据包；
第二网络设备将所述数据包发送给第一网络设备。
在一些可能的实现方式中，所述第二网络设备向第一网络设备发送所述第一消息的确认消息， 之后还包括：
第二网络设备接收所述终端设备在RRC去激活态下发送的数据包；
第二网络设备经过协议栈处理所述数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；
第二网络设备将处理后的数据包发送给第一网络设备。
在一些可能的实现方式中，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
第三方面，本申请提供一种数据传输方法，包括：
终端设备进入RRC去激活态；
所述终端设备在RRC去激活态下发送数据包给第二网络设备。
在一些可能的实现方式中，所述终端设备进入RRC去激活态之后，所述终端设备在RRC去激活态下发送数据包给第二网络设备之前，还包括：所述终端设备接收第一网络设备发送的第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
在一些可能的实现方式中，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息。
在一些可能的实现方式中，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
在一些可能的实现方式中，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
在一些可能的实现方式中，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
在一些可能的实现方式中，所述数据包包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
第四方面，本申请提供一种网络设备，包括：
处理器，用于确定终端设备进入RRC去激活态；
收发器，用于向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据；以及接收所述第二网络设备发送的所述第一消息的确认消息。
在一些可能的实现方式中，所述第一消息包括：所述网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述第一消息还包括下述信息之一或任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
在一些可能的实现方式中，所述第二网络设备发送的所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。
在一些可能的实现方式中，所述第二网络设备发送的所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述收发器还用于向所述终端设备发送第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
在一些可能的实现方式中，所述第二消息包含能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备的标识信息。
在一些可能的实现方式中，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
在一些可能的实现方式中，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
在一些可能的实现方式中，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
在一些可能的实现方式中，所述收发器还用于接收第二网络设备传输的数据包、以及将所述数据包发送至核心网，其中，第二网络设备传输的数据包为第二网络设备接收的所述终端设备在RRC去激活态下发送的数据包。
在一些可能的实现方式中，所述收发器还用于接收第二网络设备传输的数据包；
所述处理器还用于经过协议栈处理第二网络设备传输的数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；
所述收发器还用于将所述经过协议栈处理的第二网络设备传输的数据包发送至核心网。
在一些可能的实现方式中，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
第五方面，本申请提供一种网络设备，包括：
收发器，用于接收第一网络设备发送的第一消息，所述第一消息用于对所述网络设备进行配置以使网络设备为终端设备在RRC去激活态下传输数据；以及用于向第一网络设备发送所述第一消息的确认消息。
在一些可能的实现方式中，所述第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、所述网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述第一消息还包括下述信息之一或任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
在一些可能的实现方式中，所述第一消息的确认消息包括：所述网络设备所能提供的承载。
在一些可能的实现方式中，所述第一消息的确认消息还包括：所述承载对应的所述网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述收发器还用于接收所述终端设备在RRC去激活态下发送的数据包；以及将所述数据包直接转发给第一网络设备。
在一些可能的实现方式中，所述收发器还用于接收所述终端设备在RRC去激活态下发送的数据包；
所述网络设备还包括处理器，用于经过协议栈处理所述数据包，所述协议栈包括下述一种或 任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；
所述收发器还用于将经过协议栈处理后的数据包发送给第一网络设备。
在一些可能的实现方式中，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
第六方面，本申请提供一种终端设备，包括：
处理器，用于控制所述终端设备进入RRC去激活态；
收发器，用于在RRC去激活态下发送数据包给第二网络设备。
在一些可能的实现方式中，所述收发器还用于接收第一网络设备发送的第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
在一些可能的实现方式中，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息。
在一些可能的实现方式中，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
在一些可能的实现方式中，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
在一些可能的实现方式中，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
在一些可能的实现方式中，所述数据包包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
本申请所述的方法，若第一网络设备确定终端设备进入RRC去激活态，则向第二网络设备发送配置第二网络设备以使第二网络设备可以为终端设备在RRC去激活态下传输数据的第一消息，以此建立与第二网络设备之间的数据传输通路；当第二网络设备接收到终端设备发送的数据包时，通过所述数据传输通路将数据包发送给第一网络设备，以使第一网络设备将数据包发送至核心网；由此减少了终端设备移动至第二网络设备覆盖范围且需要传输数据至核心网整个过程中的信令开销。
附图说明
图1是本申请实施例的一个应用场景示意图。
图2是本申请实施例的另一个应用场景示意图。
图3是本申请实施例的又一个应用场景示意图。
图4是本申请实施例一种数据传输的方法的一个流程图。
图5是本申请实施例一种数据传输的方法的另一个流程图。
图6是本申请实施例的网络设备600的示意性框图。
图7是本申请实施例的网络设备700的示意性框图。
图8是本申请实施例的终端设备800的示意性框图。
具体实施方式
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，简称“GSM”)系统、码分多址(Code Division Multiple Access，简称“CDMA”)系统、宽带码分多址(Wideband Code Division Multiple Access，简称“WCDMA”)系统、通用分组无线业务(General Packet Radio Service，简称“GPRS”)、长期演进(Long Term Evolution，简称“LTE”)系统、通用移动通信系统(Universal Mobile Telecommunication System，简称“UMTS”)等目前的通信系统，以及，尤其应用于未来的5G系统。
本申请实施例中的终端设备也可以指用户设备(User Equipment，简称“UE”)、接入终端、用户单元、用户站、移动站、终端设备、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，简称“SIP”)电话、无线本地环路(Wireless Local Loop，简称“WLL”)站、个人数字处理(Personal Digital Assistant，简称“PDA”)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，简称“PLMN”)中的终端设备等。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是GSM或CDMA中的基站(Base Transceiver Station，简称“BTS”)，也可以是WCDMA系统中的基站(NodeB，简称“NB”)，还可以是LTE系统中的演进型基站(Evolutional NodeB，简称“eNB或eNodeB”)，还可以是云无线接入网络(Cloud Radio Access Network，简称“CRAN”)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等。
本申请实施例提到的无线资源控制RRC去激活态是终端设备在5G网络中的一种状态。对一个终端设备来说，在5G网络中有3种状态：RRC连接态、RRC去激活态和空闲态，其中，RRC连接态和空闲态与LTE系统中类似，此处不赘述，RRC去激活态是5G网络中终端设备特有的一种状态，终端设备处于RRC去激活态时，有如下特性：
1、即使终端设备在空口没有数据传输，但终端设备的用户RRC上下文信息依然保留在RAN侧，且RAN侧为该RRC去激活态终端设备保留与核心网的连接。
2、处于RRC去激活态的终端设备，可以直接发送上行小数据包，而不需要通过建立RRC信令转移到RRC连接态。
总的来说，终端设备的RRC去激活态是介于RRC连接态和空闲态之间的一种状态。终端设备在RRC去激活态可达到省电的效果；当需要与RAN侧交互数据时，不需要转移到RRC连接态，可直接发送/接收数据，且RAN侧也可直接快速地发送数据至核心网/从核心网接收数据，因为RAN侧为该RRC去激活态终端设备保留与核心网的连接。
下面介绍本申请实施例的应用场景。
本申请实施例的一个应用场景，如图1所示。
该场景包括：第一网络设备，至少一个第二网络设备和终端设备，该第一网络设备可以是 Anchor New Radio(简称“ANR”)101，该第二网络设备可以是Assitant New Radio(简称“SNR”)102，该终端设备可以是UE103，ANR101与SNR102之间存在有线连接。UE103当前在ANR101覆盖的Cell1内，UE103处于移动状态，将会从ANR101覆盖的Cell 1移动至SNR102覆盖的Cell 2内。
本申请实施例的另一个应用场景，如图2所示。
该场景包括：中心单元(Central Unit，简称“CU”)201，主分布单元(Anchor Distribute Unit，简称“ADU”)202，辅分布单元(Assitant Distribute Unit，简称“SDU”)203和UE204，CU201控制ADU202和SDU203。UE204当前在ADU202覆盖的Cell 1内，UE204处于移动状态，将会从ADU202覆盖的Cell 1移动至SDU203覆盖的Cell 2内。
本申请实施例的又一个应用场景，如图3所示。
该场景包括：主中心单元(Anchor Central Unit，简称“ACU”)301，辅中心单元(Assitant Central Unit，简称“SCU”)302，主分布单元(Anchor Distribute Unit，简称“ADU”)303，辅分布单元(Assitant Distribute Unit，简称“SDU”)304和UE305，ACU301控制ADU303，SCU302控制SDU304，ACU301与SCU302之间存在有线连接。UE305当前在ADU303覆盖的Cell 1内，UE305处于移动状态，将会从ADU303覆盖的Cell 1移动至SDU304覆盖的Cell 2内。
下面介绍本申请提供的方法。
这里需要说明的是，第一网络设备可以向邻接的多个网络设备发送第一消息，这里的第二网络设备只是一个代称，并不限定是一个网络设备。
且本申请中所述的网络设备指接入网设备。
实施例一
如图4所示，一种数据传输的方法，包括：
S10、第一网络设备确定终端设备进入RRC去激活态。
S10中，终端设备在第一网络设备的覆盖范围下，从RRC连接态进入RRC去激活态。由上述的终端设备在RRC去激活态的特性可知，第一网络设备与核心网保留所述终端设备的至少一个数据面连接。
终端设备从RRC连接态进入RRC去激活态，第一网络设备确定终端设备进入RRC去激活态。
第一网络设备确定终端设备进入RRC去激活态包括：第一网络设备确定终端设备将要进入RRC去激活态，或者，第一网络设备确定终端设备已经进入RRC去激活态。
第一网络设备确定终端设备将要进入RRC去激活态，具体而言，第一网络设备可以根据终端设备的业务情况等，决定让终端设备从RRC连接态进入RRC去激活态。例如，若监测到终端设备在一段时间内没有业务发生，例如没有上行和下行数据传输，则可以让终端设备从RRC连接态进入RRC去激活态，从而达到省电的效果。
第一网络设备确定终端设备已经进入RRC去激活态，具体而言，第一网络设备在此之前已经通过RRC信令将所述终端设备从RRC连接态转移至RRC去激活态，所述RRC信令可以是状态转移信令，也可以是其他RRC信令。
S11、第一网络设备向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备可以为所述终端设备在RRC去激活态下传输数据。
S11中，如S10所述，终端设备在第一网络设备的覆盖范围下状态发生转移，从RRC连接态进入RRC去激活态。当第一网络设备检测到终端设备的状态发生转移，则第一网络设备向邻近的多个第二网络设备发送第一消息，该第一消息的目的在于：对第二网络设备进行配置，使得当处于 所述RRC去激活态的终端设备从第一网络设备的覆盖范围移动至第二网络设备的覆盖范围下并且需要传输数据时，第二网络设备可以将终端设备发送给其的数据转发给第一网络设备。
第一网络设备为达到上述第一消息的目的，第一网络设备发送的第一消息须包含以下信息：所述第一网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备Xn接口上的地址信息。
其中，第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载，可参考终端设备在第一网络设备上的承载而定。例如，终端设备在第一网络设备上有5个承载(承载A、承载B、承载C、承载D、承载E)，第一网络设备可认为第二网络设备需提供该5个承载(承载A、承载B、承载C、承载D、承载E)。或者，第一网络设备认为第二网络设备只需提供其中3个承载(承载A、承载B、承载C)就可完成传输数据，此时，第一网络设备发送的第一消息中，第二网络设备为终端设备在RRC去激活态下传输数据需提供的承载，即为该3个承载(承载A、承载B、承载C)。
其中，承载在所述第一网络设备Xn接口上的地址信息，用于指示第二网络设备将相应承载的数据发送至第一网络设备Xn接口相应的地址上。所述Xn接口指第五代通信系统中基站(gNB)/小区之间的接口。
其中，所述终端设备的标识信息在RAN Notification Area中可以唯一指示所述终端设备，可以是以下形式的一种或者几种的组合：C-RNTI(小区无线网络临时标识，由基站分配给UE的一个动态标识，唯一标识了一个小区空口下的UE)，第一网络设备为终端设备分配的第三状态下的标识，所述标识可以是C-RNTI+第一网络设备标识的形式，也可以是单独的C-RNTI形式。
其中，所述第一网络设备的标识，可以为以下形式的至少一种：物理层小区标识、全局小区标识、gNB UE XnAP ID(第一网络设备上Xn接口唯一指示用户的ID)。
第一消息除了包括上述的信息之外，还可以包括：所述承载所属的网络切片信息、和/或所述承载对应的逻辑信道配置信息，和/或所述承载对应的协议栈配置信息。
其中，所述协议栈配置信息可以是一个具体的协议栈参数和/或功能的配置信息，也可以是一个指示信息，所述指示信息用于指示第二网络设备依据规定的参数和/或功能配置。
其中，所述逻辑信道配置信息可以是一个具体的逻辑信道参数和/或功能的配置信息，也可以是一个指示信息，所述指示信息用于指示第二网络设备依据规定的参数和/或功能配置。
S12、第二网络设备向第一网络设备发送所述第一消息的确认消息。
S12中，第二网络设备发送第一消息的确认消息，有两种机制：
第一种机制：第二网络设备将自己能提供的承载发送给第一网络设备。
进一步地，第二网络设备还可以将自己能提供的承载对应的第二网络设备Xn接口上的地址信息，同自己能提供的承载一并发送给第一网络设备。
例如，在S11中第一网络设备发送的第一消息中，所述第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载包括5个承载(承载A、承载B、承载C、承载D、承载E)。第二网络设备在收到S11中的第一消息后，根据自己的资源调度情况，确定只能提供其中3个承载(例如，承载A、承载B、承载E)。于是，在这种情况下，第二网络设备发送第一消息的确认消息，该第一消息的确认消息包含第二网络设备所能提供的3个承载(承载A、承载B、承载E)。
进一步地，第二网络设备可以将该3个承载(承载A、承载B、承载E)对应的第二网络设备Xn接口上的地址信息，一并发送给第一网络设备。
第二种机制：第二网络设备根据自己的资源调度情况，若能全部提供S11中的第一消息中所述的需要的承载，则第二网络设备发送确认消息给第一网络设备。更进一步地，第二网络设备将所述第一消息中所述的需要的承载对应的第二网络设备Xn接口上的地址信息发送给第一网络设备。
第二网络设备根据自己的资源调度情况，若不能全部提供S11中的第一消息中所述的需要的承载，则第二网络设备将拒绝第一网络设备的请求，在这种情况下，第二网络设备发送的第一消息的确认消息包含拒绝信息。
本申请实施例，若处于所述RRC去激活态的终端设备从第一网络设备的覆盖范围移动至第二网络设备的覆盖范围下并且需要发送数据给第二网络设备时，第二网络设备识别出该终端设备、及该终端设备发送的数据所属的承载，依据第一消息中承载对应的第一网络设备Xn接口的地址信息，将数据发送至第一网络设备，以使第一网络设备将数据发送至核心网。
本申请实施例，第二网络设备将终端设备的数据传输给第一网络设备以使第一网络设备将数据发送至核心网，而不需要第二网络设备与核心网之间建立路径以使第二网络设备将数据发送至核心网，以此减小了终端设备发送数据至核心网整个过程中的信令开销。
实施例二
如图5所示，一种数据传输的方法，包括：
S20、第一网络设备确定终端设备进入RRC去激活态。
S21、第一网络设备向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据。
S22、第二网络设备向第一网络设备发送所述第一消息的确认消息。
S20-S22，同上一实施例中的S10-S12，此处不赘述。
S23、第一网络设备向终端设备发送第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
S23中，第一网络设备根据接收到的第一消息的确认消息，向终端设备发送第二消息，该第二消息指示能为终端设备在RRC去激活态下传输数据的第二网络设备。
第二消息可以有多种形式，例如，能为终端设备传输数据的第二网络设备的标识信息的列表；再例如，第一网络设备的RNA的位图信息；再例如，指示位信息。
1、第二消息包含能为终端设备传输数据的第二网络设备的标识信息的列表，所述列表中的第二网络设备都能为终端设备中继数据。
2、第二消息包含第一网络设备的RNA的位图信息，具体地指，第一网络设备为终端在RRC去激活态下分配的RNA(RAN Notification Area)的位图信息，所述位图信息用于标识在第一网络设备为终端在RRC去激活态下分配的RNA范围内，能为终端设备中继数据的所有第二网络设备。
第一网络设备为所述终端在RRC去激活态下分配的的RNA，指第一网络设备给终端设备配置的该终端在Inactive态下的无线接入网的通知区域(RAN based notification area，RNA)。该RNA包含一个或多个小区。当终端设备在Inactive态下重选到该RNA范围内的其他小区时，可以不通知网络，而当终端设备重选到该RNA范围以外的小区时，则需要通知网络。
位图信息是一个多bit的字符串，字符串的位数可以与RNA小区列表中的小区个数相同，也可以是一个固定的位数。位图信息中的每个bit指示RNA小区列表(RNA小区列表，指RNA包含的小区)中相应的小区是否支持终端设备在Inactive下传输数据，例如RNA小区列表中包含的小区分别为：小区#1、小区#2、小区#4、小区#6，则位图信息至少包含4bit，并且设定位图信息中的0指示小区 不支持终端设备在Inactive下传输数据，而1支持，那么位图如果是0101，则意味着小区#2和小区#6支持终端设备在Inactive下传输数据，而小区#1和小区#4不支持。值得注意的是，位图信息也可以超过4bit，例如在标准中规定位图信息固定为16个bit，如果加入RNA的只有四个小区，那么意味着可以在这16个bit中，规定4个bit代表RNA中的小区是否支持终端设备在Inactive下传输数据(例如前4个bit)，另外的12bit可以填充为0。若RNA有6个小区，那么可以规定6个bit代表RNA中的小区是否支持终端设备在Inactive下传输数据(例如前6个bit)，另外的10bit可以填充为0。
上段所述的小区，可对应到相应的网络设备，例如，小区#1和小区#4为第二网络设备A覆盖的小区，小区#2和小区#6为第二网络设备B覆盖的小区。
3、第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在Inactive态下发送数据，所述第一网络设备的RNA指第一网络设备为所述终端在RRC去激活态下分配的的RNA。该指示位信息用1bit来表示，例如，若该bit为1，则表示第一网络设备的RNA范围内的所有第二网络设备能为终端设备在Inactive态下发送数据，若该bit为0，则表示不是第一网络设备的RNA范围内的所有第二网络设备都能为终端设备在Inactive态下发送数据。
更进一步地，第二消息除了指示能为终端设备在RRC去激活态下传输数据的第二网络设备之外，还可以更进一步地指示每个能中继数据的第二网络设备所能提供的承载。例如，第二消息中指示的第二网络设备包括第二网络设备A、第二网络设备B、第二网络设备C，其中，第二网络设备A能提供的承载包括承载1、承载3、承载5；第二网络设备B能提供的承载包括承载2、承载4；第二网络设备C能提供的承载包括承载3、承载5。则第二消息包括一个能为终端设备在RRC去激活态下传输数据的第二网络设备的承载列表，如下表格所示：
Figure PCTCN2018074032-appb-000001
或者，例如，第二消息中指示的第二网络设备包括第二网络设备A、第二网络设备B、第二网络设备C，其中，第二网络设备A能提供的承载包括承载1、承载3、承载5；第二网络设备B能提供的承载包括承载2、承载4；第二网络设备C能提供的承载包括承载3、承载5。则可以选取最小集，即在位图信息中指示只有第二网络设备A和第二网络设备B可以为所述终端在RRC去激活状态下传输数据，能提供的承载为承载3和承载5。
S24、终端设备在RRC去激活态下发送数据包给第二网络设备。
S24中，终端设备通过随机接入过程发送导频信号获得上行同步和/或上行调度资源后发送上行数据包给第二网络设备，或者没有接入过程，而直接采用基于竞争的资源或者预留的资源发送数据包给第二网络设备(即Grant free方式)。
所述终端设备在RRC去激活态下发送的数据包为小数据包，一般为小于预设阈值大小的数据包。终端设备不需要建立RRC连接将终端设备状态转移至RRC连接态再发送所述小数据包，终端设备在RRC去激活态下直接发送所述小数据包。本申请所述方法，解决处于RRC去激活态下的终端设备从 原来的第一网络设备覆盖范围移动至第二网络设备覆盖范围时，如何向核心网发送上行小数据包的问题。
所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。本申请对所述指示字段、数据字段和MAC CE字段的位置不做限制。
本申请，终端设备在MAC层对要发送的数据进行打包生成，终端设备在MAC层生成要发送的数据包，该数据包包含指示字段、数据字段和MAC CE字段；其中，MAC CE字段为新的字段，用来存储终端设备的标识信息。第二网络设备在接收到该数据包后，在MAC层即可解析出终端设备的标识信息，从而快速知道该数据包来自哪个终端设备。
S25、第二网络设备将接收到的数据包发送第一网络设备，以使第一网络设备将该数据包发送至核心网。
S25中，第二网络设备将接收到的数据包发送第一网络设备，有两种方式：
1、第二网络设备接收并直接转发所述终端设备在RRC去激活态下发送的数据包。
2、第二网络设备接收所述终端设备在RRC去激活态下发送的数据包，并经过协议栈处理后再发送给第一网络设备，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层。
第一网络设备将该数据包发送至核心网，也有有两种方式：
1、第一网络设备接收并直接转发第二网络设备发送的数据包。
2、第一网络设备接收第二网络设备发送的数据包，并经过协议栈处理后再发送给核心网，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层。
本申请实施例，第二网络设备将终端设备的数据传输给第一网络设备以使第一网络设备将数据发送至核心网，而不需要第二网络设备与核心网之间建立路径以使第二网络设备将数据发送至核心网，以此减小了终端设备发送的数据传输至核心网整个过程中的信令开销。
上述实施例一和实施例二所述的方法，可适用于本申请中所提及的三种应用场景。
在如图1所示的应用场景中，所述第一网络设备为主网络设备ANR101，第二网络设备为辅网络设备SNR102。
在如图2所示的应用场景中，所述第一网络设备为中心单元CU201，所述第二网络设备为辅分布单元SDU203，其中所述中心单元CU201控制所述辅分布单元SDU203。
在如图3所示的应用场景中，第一网络设备为主中心单元ACU301，第二网络设备为辅中心单元SCU302，所述主中心单元ACU301控制主分布单元ADU303，所述辅中心单元SCU302控制辅分布单元SDU304，其中，
第一网络设备向第二网络设备发送第一消息，包括：
主中心单元ACU301向辅中心单元SCU302发送第一消息，以使辅中心单元SCU302将所述第一消息发送给辅分布单元SDU304。
第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，包括：
主中心单元ACU301接收辅分布单元SDU304通过辅中心单元SCU302发送的所述第一消息的确认消息，所述第一消息的确认消息是辅分布单元SDU304对接收到的辅中心单元SCU302发送的所述第一消息做出的。
上文中详细描述了本申请实施例的数据传输方法，下面将描述本申请实施例的网络设备及终端设备。应理解，本申请实施例的网络设备及终端设备可以执行前述实施例的数据传输方法，即以下两种网络设备的具体工作过程及终端设备的具体工作过程，可以参考前述实施例方法中的对应过程。
实施例三
图6示出了本申请实施例的网络设备600的示意性框图。该网络设备600可以为前述方法实施例中的第一网络设备。如图6所示，一种网络设备600，包括：
处理器601，用于确定终端设备进入RRC去激活态。
收发器602，用于向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据；以及接收所述第二网络设备发送的所述第一消息的确认消息。
其中，所述第一消息包括：所述网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述网络设备的Xn接口上的地址信息。可选地，所述第一消息还包括下述信息之一或任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
其中，所述第二网络设备发送的所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。可选地，所述第二网络设备发送的所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，收发器602还用于向所述终端设备发送第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
其中，可选地，第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息；可选地，第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备；可选地，第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下发送数据。可选地，第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
在一些可能的实现方式中，所述收发器602还用于接收第二网络设备传输的数据包、以及将所述数据包发送至核心网，其中，第二网络设备传输的数据包为第二网络设备接收并直接转发的所述终端设备在RRC去激活态下发送的数据包或者第二网络设备接收并经过协议栈处理的所述终端设备在RRC去激活态下发送的数据包。
在一些可能的实现方式中，所述收发器602还用于接收到的第二网络设备传输的数据包，其中，第二网络设备传输的数据包为第二网络设备接收并直接转发的所述终端设备在RRC去激活态下发送的数据包或者第二网络设备接收并经过协议栈处理的所述终端设备在RRC去激活态下发送的数据包；所述处理器601还用于经过协议栈处理第二网络设备传输的数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；所述收发器602还用于将所述经过协议栈处理的第二网络设备传输的数据包发送至核心网。
在上述两种可能的实现方式中，可选地，上述终端设备在RRC去激活态下发送的数据包，包 含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
本申请实施例的网络设备600可对应于本申请实施例方法中的第一网络设备，并且网络设备600中的各个模块的上述和其它操作和/或功能分别为了实现前述各个方法的相应流程，为了简洁，在此不再赘述。
实施例四
图7示出了本申请实施例的网络设备700的示意性框图。该网络设备700可以为前述方法实施例中的第二网络设备。如图7所示，一种网络设备700，包括：
收发器701，用于接收第一网络设备发送的第一消息，所述第一消息用于对所述网络设备进行配置以使网络设备为终端设备在RRC去激活态下传输数据；以及用于向第一网络设备发送所述第一消息的确认消息。
其中，第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、所述网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。可选地，所述第一消息还包括下述信息之一或任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
其中，第一消息的确认消息包括：所述网络设备所能提供的承载。可选地，第一消息的确认消息还包括：所述承载对应的所述网络设备的Xn接口上的地址信息。
在一些可能的实现方式中，所述收发器701还用于接收所述终端设备在RRC去激活态下发送的数据包；以及将所述数据包直接转发给第一网络设备。
在一些可能的实现方式中，所述收发器701还用于接收所述终端设备在RRC去激活态下发送的数据包；所述终端设备还包括处理器702，用于经过协议栈处理所述数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；所述收发器701还用于将处理后的数据包发送给第一网络设备。
在上述两种可能的实现方式中，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
本申请实施例的网络设备700可对应于本申请实施例方法中的第二网络设备，并且网络设备700中的各个模块的上述和其它操作和/或功能分别为了实现前述各个方法的相应流程，为了简洁，在此不再赘述。
实施例五
图8示出了本申请实施例的终端设备800的示意性框图。该终端设备800可以为前述方法实施例中的终端设备。如图8所示，一种终端设备800，包括：
处理器801，用于控制所述终端设备800进入RRC去激活态；
收发器802，用于在RRC去激活态下发送数据包给第二网络设备。
可选地，所述数据包包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
在一些可能的实现方式中，所述收发器802还用于接收第一网络设备发送的第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
其中，可选地，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二 网络设备的标识信息；可选地，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备；可选地，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据；可选地，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
本申请实施例的终端设备800可对应于本申请实施例方法中的终端设备，并且终端设备800中的各个模块的上述和其它操作和/或功能分别为了实现前述各个方法的相应流程，为了简洁，在此不再赘述。
应理解，在本发明实施例中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、设备和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (62)

  1. 一种数据传输方法，其特征在于，包括：
    第一网络设备确定终端设备进入无线资源控制RRC去激活态；
    第一网络设备向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备可以为所述终端设备在RRC去激活态下传输数据；
    第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息。
  2. 根据权1所述的方法，其特征在于，所述第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。
  3. 根据权1或权2所述的方法，其特征在于，所述第一消息还包括下述信息之一或者任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
  4. 根据权1-3任一项所述的方法，其特征在于，所述第二网络设备发送的所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。
  5. 根据权4所述的方法，其特征在于，所述第二网络设备发送的所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
  6. 根据权1所述的方法，其特征在于，所述第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，之后还包括：所述第一网络设备向所述终端设备发送第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
  7. 根据权6所述的方法，其特征在于，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息。
  8. 根据权6所述的方法，其特征在于，所述第二消息包含第一网络设备的基于无线接入网的通知区域RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
  9. 根据权6所述的方法，其特征在于，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
  10. 根据权6-9任一项所述的方法，其特征在于，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
  11. 根据权1所述的方法，其特征在于，所述第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，之后还包括：
    第一网络设备将接收到的第二网络设备传输的数据包直接发送至核心网，其中，第二网络设备传输的数据包为第二网络设备接收的所述终端设备在RRC去激活态下发送的数据包。
  12. 根据权1所述的方法，其特征在于，所述第一网络设备接收所述第二网络设备发送的所述第一消息的确认消息，之后还包括：
    第一网络设备将接收并经过协议栈处理后的第二网络设备传输的数据包发送至核心网，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层。
  13. 根据权11或12所述的方法，其特征在于，所述终端设备在RRC去激活态下发送的数据 包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
  14. 一种数据传输方法，其特征在于，包括：
    第二网络设备接收第一网络设备发送的第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据；
    第二网络设备向第一网络设备发送所述第一消息的确认消息。
  15. 根据权14所述的方法，其特征在于，所述第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。
  16. 根据权15所述的方法，其特征在于，所述第一消息还包括下述信息之一或者任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
  17. 根据权14-16任一项所述的方法，其特征在于，所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。
  18. 根据权17所述的方法，其特征在于，所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
  19. 根据权14所述的方法，其特征在于，所述第二网络设备向第一网络设备发送所述第一消息的确认消息，之后还包括：
    第二网络设备接收所述终端设备在RRC去激活态下发送的数据包；
    第二网络设备将所述数据包直接发送给第一网络设备。
  20. 根据权14所述的方法，其特征在于，所述第二网络设备向第一网络设备发送所述第一消息的确认消息，之后还包括：
    第二网络设备接收所述终端设备在RRC去激活态下发送的数据包；
    第二网络设备经过协议栈处理所述数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；
    第二网络设备将处理后的数据包发送给第一网络设备。
  21. 根据权19或20所述的方法，其特征在于，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
  22. 一种数据传输方法，其特征在于，包括：
    与第一网络设备无线连接的终端设备进入RRC去激活态；
    所述终端设备在RRC去激活态下发送数据包给第二网络设备，以便于所述第二网络设备发送给所述第一网络设备。
  23. 根据权22所述的方法，其特征在于，所述终端设备进入RRC去激活态之后，所述终端设备在RRC去激活态下发送数据包给第二网络设备之前，还包括：所述终端设备接收所述第一网络设备发送的第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的所述第二网络设备。
  24. 根据权23所述的方法，其特征在于，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息。
  25. 根据权23所述的方法，其特征在于，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
  26. 根据权23所述的方法，其特征在于，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
  27. 根据权23-26任一项所述的方法，其特征在于，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
  28. 根据权22所述的方法，其特征在于，所述数据包包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
  29. 一种网络设备，其特征在于，包括：
    处理器，用于确定终端设备进入RRC去激活态；
    收发器，用于向第二网络设备发送第一消息，所述第一消息用于对所述第二网络设备进行配置以使第二网络设备为所述终端设备在RRC去激活态下传输数据；以及接收所述第二网络设备发送的所述第一消息的确认消息。
  30. 根据权29所述的网络设备，其特征在于，所述第一消息包括：所述网络设备的标识信息、所述终端设备的标识信息、第二网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述网络设备的Xn接口上的地址信息。
  31. 根据权30所述的网络设备，其特征在于，所述第一消息还包括下述信息之一或任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
  32. 根据权29-31任一项所述的网络设备，其特征在于，所述第二网络设备发送的所述第一消息的确认消息包括：所述第二网络设备所能提供的承载。
  33. 根据权32所述的网络设备，其特征在于，所述第二网络设备发送的所述第一消息的确认消息还包括：所述承载对应的第二网络设备的Xn接口上的地址信息。
  34. 根据权29所述的网络设备，其特征在于，所述收发器还用于向所述终端设备发送第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的第二网络设备。
  35. 根据权34所述的网络设备，其特征在于，所述第二消息包含能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备的标识信息。
  36. 根据权34所述的网络设备，其特征在于，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
  37. 根据权34所述的网络设备，其特征在于，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
  38. 根据权34-37任一项所述的网络设备，其特征在于，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供 的承载。
  39. 根据权29所述的网络设备，其特征在于，所述收发器还用于接收第二网络设备传输的数据包、以及将所述数据包发送至核心网，其中，第二网络设备传输的数据包为第二网络设备接收的所述终端设备在RRC去激活态下发送的数据包。
  40. 根据权29所述的网络设备，其特征在于，所述收发器还用于接收第二网络设备传输的数据包；
    所述处理器还用于经过协议栈处理第二网络设备传输的数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；
    所述收发器还用于将所述经过协议栈处理的第二网络设备传输的数据包发送至核心网。
  41. 根据权39或40所述的网络设备，其特征在于，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
  42. 一种网络设备，其特征在于，包括：
    收发器，用于接收第一网络设备发送的第一消息，所述第一消息用于对所述网络设备进行配置以使网络设备为终端设备在RRC去激活态下传输数据；以及用于向第一网络设备发送所述第一消息的确认消息。
  43. 根据权42所述的网络设备，其特征在于，所述第一消息包括：所述第一网络设备的标识信息、所述终端设备的标识信息、所述网络设备为所述终端设备在RRC去激活态下传输数据需提供的承载、及所述承载在所述第一网络设备的Xn接口上的地址信息。
  44. 根据权43所述的网络设备，其特征在于，所述第一消息还包括下述信息之一或任意组合：所述承载所属的网络切片信息、所述承载对应的逻辑信道配置信息、或所述承载对应的协议栈配置信息。
  45. 根据权42-44任一项所述的网络设备，其特征在于，所述第一消息的确认消息包括：所述网络设备所能提供的承载。
  46. 根据权45所述的网络设备，其特征在于，所述第一消息的确认消息还包括：所述承载对应的所述网络设备的Xn接口上的地址信息。
  47. 根据权42所述的网络设备，其特征在于，所述收发器还用于接收所述终端设备在RRC去激活态下发送的数据包；以及将所述数据包直接转发给第一网络设备。
  48. 根据权42所述的网络设备，其特征在于，所述收发器还用于接收所述终端设备在RRC去激活态下发送的数据包；
    所述网络设备还包括处理器，用于经过协议栈处理所述数据包，所述协议栈包括下述一种或任意组合：物理(PHY)层、媒体接入控制(MAC)层、无线链路控制(RLC)层、或分组数据会聚协议(PDCP)层；
    所述收发器还用于将经过协议栈处理后的数据包发送给第一网络设备。
  49. 根据47或48所述的网络设备，其特征在于，所述终端设备在RRC去激活态下发送的数据包，包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
  50. 一种终端设备，其特征在于，包括：
    处理器，用于控制所述终端设备进入RRC去激活态；
    收发器，用于在RRC去激活态下发送数据包给第二网络设备,以便于所述第二网络设备发送给所述第一网络设备。
  51. 根据权50所述的终端设备，其特征在于，所述收发器还用于接收所述第一网络设备发送的第二消息，所述第二消息用于指示能为所述终端设备在RRC去激活态下传输数据的所述第二网络设备。
  52. 根据权51所述的终端设备，其特征在于，所述第二消息包含能为所述终端设备在RRC去激活态下发送数据的所有第二网络设备的标识信息。
  53. 根据权51所述的终端设备，其特征在于，所述第二消息包含第一网络设备的RNA的位图信息，所述第一网络设备的RNA的位图信息用于标识在所述第一网络设备的RNA范围内，能为所述终端设备在RRC去激活态下传输数据的所有第二网络设备。
  54. 根据权51所述的终端设备，其特征在于，所述第二消息包含指示位信息，所述指示位信息用于指示所述第一网络设备的RNA范围内的所有第二网络设备是否能为所述终端设备在RRC去激活态下传输数据。
  55. 根据权51-54任一项所述的终端设备，其特征在于，所述第二消息还包含承载列表，所述承载列表用于指示所述能为所述终端设备在RRC去激活态下传输数据的第二网络设备所能提供的承载。
  56. 根据权50所述的终端设备，其特征在于，所述数据包包含指示字段、数据字段和MAC CE字段，所述MAC CE字段用于存储所述终端设备的标识信息，所述指示字段用于指示该数据包包含MAC CE字段。
  57. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在第一网络设备上运行时，使得所述第一网络设备执行如权利要求1-13中任意一种所述的方法。
  58. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在第二网络设备上运行时，使得所述第二网络设备执行如权利要求14-21中任意一种所述的方法。
  59. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在终端设备上运行时，使得所述终端设备执行如权利要求22-28中任意一种所述的方法。
  60. 一种计算机程序产品，其特征在于，包括计算机程序代码，当所述计算机程序代码在第一网络设备上运行时，使得所述第一网络设备执行如权利要求1-13中任意一项所述的方法。
  61. 一种计算机程序产品，其特征在于，包括计算机程序代码，当所述计算机程序代码在第二网络设备上运行时，使得所述第二网络设备执行如权利要求14-21中任意一项所述的方法。
  62. 一种计算机程序产品，其特征在于，包括计算机程序代码，当所述计算机程序代码在终端设备上运行时，使得所述终端设备执行如权利要求22-28中任意一项所述的方法。
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