WO2020087484A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2020087484A1
WO2020087484A1 PCT/CN2018/113576 CN2018113576W WO2020087484A1 WO 2020087484 A1 WO2020087484 A1 WO 2020087484A1 CN 2018113576 W CN2018113576 W CN 2018113576W WO 2020087484 A1 WO2020087484 A1 WO 2020087484A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
message
access network
indication
network device
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Application number
PCT/CN2018/113576
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English (en)
Chinese (zh)
Inventor
王宏
于映辉
张戬
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2018/113576 priority Critical patent/WO2020087484A1/fr
Publication of WO2020087484A1 publication Critical patent/WO2020087484A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the technical field of wireless communication, and in particular to a data transmission method and device.
  • a radio resource control (RRC) connection needs to be established through a random access (RA) process After the RRC connection is established, data transmission can be performed between the terminal device and the base station.
  • RRC radio resource control
  • RA random access
  • MTC machine type communication
  • NB-IoT narrowband internet of things
  • EDT early data transmission
  • the terminal device needs to re-initiate the EDT process in order to pass the EDT
  • the process of sending upstream data increases the data transmission delay, increases the power consumption of the terminal device, and reduces the data transmission efficiency.
  • the purpose of the embodiments of the present application is to provide a data transmission method and device for reducing data transmission delay, reducing power consumption of terminal equipment, and improving data transmission efficiency.
  • an embodiment of the present application provides a data transmission method, including: an access network device receiving a first indication from a terminal device or a core network device; in response to the first indication, the access network device is randomly connected After sending a first message to the terminal device during the entry process, receiving first uplink data from the terminal device, the first message is used to instruct to release the connection between the terminal device and the access network device; The access network device releases the connection.
  • the access network device responds to the first indication and continues to wait for the terminal device to send uplink data after sending the first message, instead of directly releasing or suspending the connection between the terminal device and the access network device, thereby avoiding the terminal device from After receiving the first message, in order to send the first uplink data, the connection establishment or recovery process is initiated again, thereby reducing the data transmission delay, reducing the power consumption of the terminal device, and improving the data transmission efficiency.
  • the first indication is used to indicate that the terminal device has uplink data to send; or, the first indication is used to indicate that the terminal device has downlink data packets to be sent, and triggers Sending uplink data of the terminal device.
  • the first message includes the first downlink data of the terminal device.
  • the access network device receiving the first indication from the core network device includes: the access network device receiving a second message from the core network device, the second message including the first An indication; the second message includes a first paging message or a terminal device context recovery response message.
  • the access network device receives the first indication through the first paging message or the terminal device context recovery response message, so that the access network device can determine whether there is uplink data before receiving the uplink data of the terminal device.
  • the access network device receiving the first indication from the terminal device includes: the access network device receiving a random access preamble corresponding to the first indication from the terminal device; or , The access network device receives a third message from the terminal device, the third message includes the first indication; the third message includes a radio resource control RRC connection recovery request message or an RRC early transmission data request message .
  • the method further includes: the access network device sends a second indication to the terminal device, and the second indication enables the terminal device to send the second message after receiving the first message The first uplink data.
  • the access network device instructs the terminal device to send the first uplink data through the second instruction, so that after the terminal device receives the first message, it is determined that the access network device will still maintain the relationship between the terminal device and the access network device connection.
  • the method further includes: the access network device sends a second indication to the terminal device; the second indication is used to indicate that the terminal device has uplink data to send; or, the second The indication is used to indicate that the terminal device has a downlink data packet to be delivered, and will trigger uplink data transmission of the terminal device.
  • the access network device instructs the terminal device to send uplink data through the second instruction, so that after the terminal device receives the first message, it is determined that the access network device will still maintain the connection between the terminal device and the access network device .
  • the access network device sending the second indication to the terminal device includes: the access network device sending a second paging message to the terminal device, the second paging message Including the second indication; or, the access network device sends the second indication to the terminal device through the first message.
  • the second indication includes RRC connection restoration information.
  • the second indication is also used to indicate a first duration; after the access network device sends the first message to the terminal device during the random access process, the second indication is received from the terminal device.
  • An uplink data includes: the access network device receives the first uplink data from the terminal device within the first duration after the first message is sent to the terminal device during the random access process.
  • releasing the connection by the access network device includes: the access network device releasing the connection after the first duration.
  • the access network device After sending the first message, the access network device does not immediately release the connection, but keeps the connection for a first duration before releasing it, so that the terminal device can send through the connection within the first duration Uplink data, thereby reducing data transmission delay, reducing power consumption of terminal equipment, and improving data transmission efficiency of terminal equipment.
  • the first message is an RRC connection release message.
  • an embodiment of the present application provides a data transmission device.
  • the data transmission device includes a processor, and the processor is coupled to a memory, where: the memory is used to store instructions; the processor is used to execute instructions stored in the memory, To perform the method in the first aspect or any possible design of the first aspect.
  • the data transmission device may further include the memory.
  • the data transmission device may further include a transceiver for supporting the data transmission device to send and / or receive information in the above method.
  • the data transmission apparatus may be an access network device or an apparatus in the access network device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other Circuit structure and / or discrete devices.
  • an embodiment of the present application provides a data transmission device for implementing the above-mentioned first aspect or any method in the first aspect, including corresponding functional modules, such as a processing unit, a transceiver unit, etc. To implement the steps in the above method.
  • an embodiment of the present application provides a data transmission method, including: a terminal device receiving a first message from an access network device during a random access process, where the first message is used to instruct to release the terminal device and all Connection of the access network device; the terminal device sends first uplink data to the access network device; the terminal device releases the connection.
  • the terminal device after receiving the first message, the terminal device does not directly release or suspend the connection between the terminal device and the access network device, but releases the connection after sending the first uplink data, thereby avoiding For the first upstream data, the connection establishment or restoration process is initiated again, thereby reducing the data transmission delay, reducing the power consumption of the terminal device, and improving the data transmission efficiency.
  • the method further includes: the terminal device sending a first indication to the access network device.
  • the first indication is used to indicate that the terminal device has uplink data to send; or, the first indication is used to indicate that the terminal device has downlink data packets to be sent, and triggers Sending uplink data of the terminal device.
  • the first message includes the first downlink data of the terminal device.
  • the terminal device sending the first indication to the access network device includes: the terminal device sending a random access preamble corresponding to the first indication to the access network device Or, the terminal device sends a third message to the access network device, the third message includes the first indication; the third message is a radio resource control RRC connection recovery request message or RRC early transmission data Request message.
  • the method further includes: the terminal device receiving a second indication from the access network device, the second indication enabling the terminal device to receive the first message, Sending the first uplink data.
  • the method further includes: the terminal device receives a second indication from the access network device; the second indication is used to indicate that the terminal device has uplink data to send; or, the second The indication is used to indicate that the terminal device has a downlink data packet to be delivered, and will trigger uplink data transmission of the terminal device.
  • the terminal device determines that the access network device will still maintain the connection between the terminal device and the access network device, so that uplink data can be sent through the connection, reducing data transmission delay and reducing
  • the power consumption of the terminal equipment improves the data transmission efficiency of the terminal equipment.
  • the terminal device receiving the second indication from the access network device includes: the terminal device receiving a second paging message from the access network device, the second paging message Including the second indication; or, the terminal device receives the second indication from the access network device through the first message.
  • the terminal device After the terminal device receives the second indication, it is determined that the access network device will still maintain the connection between the terminal device and the access network device, so that uplink data can be sent through the connection, reducing data transmission delay and reducing the power of the terminal device. Consumption, improve the data transmission efficiency of terminal equipment.
  • the second indication includes RRC connection restoration information.
  • the second indication is also used to indicate the first duration;
  • the terminal device sending the first uplink data to the access network device includes: the terminal device receives the first Within the first duration after the message, the first uplink data is sent to the access network device.
  • releasing the connection by the terminal device includes: the terminal device releasing the connection after the first duration.
  • the terminal device after receiving the first message, the terminal device does not immediately release the connection, but keeps the connection for a first duration before releasing it, so that the terminal device can send uplink data through the connection within the first duration In order to reduce the data transmission delay, reduce the power consumption of the terminal equipment, and improve the data transmission efficiency of the terminal equipment.
  • the first message is an RRC connection release message.
  • an embodiment of the present application provides a data transmission device.
  • the data transmission device includes a processor, and the processor is coupled to a memory, where: the memory is used to store instructions; the processor is used to execute instructions stored in the memory, A method for performing the above fourth aspect or any possible design of the fourth aspect.
  • the data transmission device may further include the memory.
  • the data transmission device may further include a transceiver for supporting the data transmission device to send and / or receive information in the above method.
  • the data transmission device may be a terminal device or a device in the terminal device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and / or Or discrete devices.
  • an embodiment of the present application provides a data transmission device for implementing the above fourth aspect or any method in the fourth aspect, including corresponding functional modules, such as a processing unit, a transceiver unit, etc., respectively To implement the steps in the above method.
  • an embodiment of the present application provides a data transmission method, including: an access network device receiving a first indication from a terminal device or a core network device; the access network device sending first downlink data to the terminal device The access network device responds to the first indication and sends a message 2 to the terminal device during the random access process; the message 2 includes an uplink resource indication, and the uplink resource indication is used to schedule uplink resources; Or, the message 2 carries an uplink authorization for EDT; the access network device receives the message 3 including the first uplink data sent by the terminal device.
  • the access network device responds to the first indication and carries the uplink resource indication or RAR for EDT in message 2, thereby instructing the terminal device to send uplink data in message 3, thereby avoiding the terminal device from receiving message 2
  • the connection establishment or restoration process is initiated again, thereby reducing the data transmission delay, reducing the power consumption of the terminal device, and improving the data transmission efficiency.
  • an embodiment of the present application provides a data transmission method, including: a terminal device receiving first downlink data sent by an access network device; the terminal device receiving the access network device and sending it during a random access process Message 2, if the terminal device determines that the uplink resource indicates that the scheduled uplink resource is greater than a threshold or the message 2 carries an uplink authorization for EDT, it sends the A message for upstream data 3.
  • the terminal device sends the uplink data in the message 3 according to the uplink resource indication carried in the message 2 or the RAR for EDT, thereby avoiding the terminal device to initiate the connection again in order to send the first uplink data after receiving the message 2.
  • Embodiments of the present application provide a computer-readable storage medium that stores computer-readable instructions, and when a computer reads and executes the computer-readable instructions, the data transmission device performs any of the above possibilities In your design.
  • An embodiment of the present application provides a computer program product, which, when a computer reads and executes the computer program product, causes a data transmission device to execute any of the above-mentioned possible design methods.
  • An embodiment of the present application provides a chip that is connected to a memory and used to read and execute a software program stored in the memory to implement any one of the above-mentioned possible design methods.
  • An embodiment of the present application provides a communication system, including the data transmission device in the second aspect and the data transmission device in the fifth aspect.
  • FIG. 1 is a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application
  • FIG. 2 is a schematic diagram of a random access process or EDT process in the prior art
  • FIG. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
  • 15 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
  • the embodiments of the present application can be applied to various mobile communication systems, such as: new radio (NR) system, global mobile communication (GSM) system, code division multiple access (CDMA) ) System, wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (LTE) system, advanced long term evolution (advanced) term evolution, LTE-A) system and other communication systems, specifically, no limitation here.
  • NR new radio
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • advanced long term evolution (advanced) term evolution LTE-A
  • FIG. 1 shows a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application.
  • the access network device and the terminal device 1 to the terminal device 6 form a communication system, in which the access network device sends information to one or more terminals of the terminal device 1 to the terminal device 6 device.
  • the terminal device 4 to the terminal device 6 also constitute a communication system in which the terminal device 5 can send information to one or more of the terminal device 4 and the terminal device 6.
  • the terminal device in the embodiment of the present application has a wireless transceiver function or a chip that can be installed in the device.
  • the terminal device can communicate with one or more core networks via a radio access network (RAN).
  • RAN radio access network
  • the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a personal digital assistant (PDA) virtual reality (VR) terminal, or augmented reality (augmented reality).
  • PDA personal digital assistant
  • VR virtual reality
  • AR augmented reality
  • the embodiments of the present application do not limit the application scenarios.
  • the aforementioned terminal device and the chip that can be provided in the aforementioned terminal device are collectively referred to as a terminal device.
  • the terminal equipment in the embodiment of the present application may also be called user equipment (UE), user terminal (user terminal), access terminal (access terminal), user unit, user station, mobile station (mobile station), Mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent or user device.
  • UE user equipment
  • user terminal user terminal
  • access terminal access terminal
  • user unit user station
  • mobile station mobile station
  • Mobile station remote station
  • remote terminal mobile device, wireless communication device, user agent or user device.
  • the access network device is a device with wireless transceiver function or a chip that can be installed in the device.
  • the access network device can be used to convert received air frames and IP packet data packets as a terminal device and access network.
  • the routers between the rest of the network can also be used to coordinate attribute management of the air interface.
  • the access network equipment includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller) , BSC), base transceiver station (BTS), home base station (eg, home evolved NodeB, or home NodeB, HNB), baseband unit (BBU), wireless fidelity (WIFI) Access points (access points, AP), wireless relay nodes, wireless backhaul nodes, transmission points (transmission and reception points, TRP or transmission points, TP), etc. in the system can also be used in 5G (NR) systems gNB or transmission point (TRP or TP), one or a group of base stations in a 5G system (including multiple antenna panels), antenna panels, etc.
  • NR 5G
  • gNB or transmission point TRP or TP
  • the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly explain the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. With the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the embodiments of the present application can be applied to networks such as NB-IoT and enhanced machine type communication (eMTC). Some of the scenarios in the embodiments of the present application are described using the eMTC network scenario in a wireless communication network as an example. It is pointed out that the solutions in the embodiments of the present application can also be applied to other wireless communication networks, and the corresponding names can also be replaced with names of corresponding functions in other wireless communication networks.
  • networks such as NB-IoT and enhanced machine type communication (eMTC).
  • the embodiments of the present application may be applied to a random access process or an EDT process.
  • the random access process or the EDT process may be as shown in FIG. 2, which mainly includes a 4-step message flow:
  • Step 201 The terminal device sends a random access preamble to the network device.
  • the random access preamble is also called message 1 (message 1, msg 1), and is used to initiate a random access process or an EDT process.
  • preambles there are multiple preambles that can be used. These preambles can be divided into two orthogonal sets, and the preambles in one set are used to initiate the third-generation partner program ( 3rd generation partnership project (3GPP) random access process in the protocol version before LTE Release 15, hereinafter referred to as set 1; the preamble in another set is used to initiate the EDT process in the protocol version of Release 15 and later, hereinafter referred to as Collection 2.
  • 3GPP 3rd generation partnership project
  • the preamble sent by the terminal device comes from set 1
  • the preamble is used to initiate the random access process in the protocol version before 3GPP Release 15
  • the preamble sent by the terminal device comes from set 2
  • the preamble is used to initiate Release EDT process in protocol versions 15 and later.
  • Step 202 The network device sends a random access response (RAR) to the terminal device.
  • RAR random access response
  • RAR can also be called message 2 (message 2, msg 2).
  • Step 203 The terminal device sends a message 3 (message 3, msg 3) to the network device.
  • message 3 does not include uplink data; in the EDT process, message 3 includes uplink data that the terminal device needs to send.
  • the uplink data indicates user plane data or IP data.
  • Step 204 The network device sends a message 4 (message 4, msg 4) to the terminal device.
  • the message is a contention resolution message; in the EDT process, the message includes an RRC connection release message in addition to the contention resolution message, which is used to instruct the terminal device Release the RRC connection.
  • FIG. 3 it is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • the method includes:
  • Step 301 The access network device receives the first indication from the core network device.
  • the core network device may be a mobility management entity (mobility management entity, MME) or a serving gateway (serving gateway, S-GW) and other devices.
  • MME mobility management entity
  • S-GW serving gateway
  • the first indication may also have any one of the following meanings, or a combination of any of the following meanings.
  • the first indication may refer to:
  • Step 302 The access network device sends a first message to the terminal device during the random access process.
  • the first message is used to instruct to release the connection between the terminal device and the access network device.
  • the connection between the terminal device and the access network device may be an RRC connection, etc. This embodiment of the present application is not limited thereto. For convenience of description, the following uses RRC connection as an example for illustration, and other details will not be repeated.
  • the first message may be message 4 in a random access process, for example, the first message is an RRC connection release message.
  • the first message may include the first downlink data of the terminal device, etc., which will not be repeated here.
  • Step 303 The terminal device receives the first message sent by the access network device to the terminal device during the random access process.
  • Step 304 The terminal device sends the first uplink data to the access network device, and releases the connection.
  • the terminal device sends the first uplink data to the access network device within the first duration after receiving the first message.
  • the first uplink data may be data that responds to the first downlink data, or may not be associated with the first downlink data, which is not limited in this embodiment of the present application.
  • the terminal device releases the connection after receiving the first duration of the first message.
  • Step 305 In response to the first indication, the access network device receives the first uplink data from the terminal device and releases the connection after sending the first message to the terminal device during the random access process .
  • the access network device releases the connection after the first duration of sending the first message.
  • the access network device receives the first uplink data sent by the terminal device within a first time period after sending the first message to the terminal device during the random access process.
  • the terminal when the first message includes the first downlink data of the terminal device, after receiving the first downlink data, the terminal monitors the first message sent by the access network device. Scheduling information. The first scheduling information is used to schedule uplink resources for sending the first uplink data.
  • the terminal device monitors the first scheduling information sent by the access network device within a first time period after receiving the first downlink data, and the first scheduling information Used to schedule uplink resources.
  • the terminal device sends the first uplink data to the access network device through the uplink resource scheduled by the first scheduling information.
  • the access network device determines that the terminal device has uplink data to send according to the first instruction, so that after sending the first message, it can continue to wait for the terminal device to send uplink data instead of directly releasing or suspending the RRC connection. Therefore, the terminal device is prevented from initiating the RRC connection establishment or restoration process again, and the data transmission efficiency is improved.
  • the access network device may obtain the first indication by receiving the second message sent by the core network device.
  • the second message includes the first indication.
  • the first indication may be sent through different messages, for example, the second message may be a first paging message (paging) or a terminal device context recovery response (UEContextResumeResponse) message or Downlink data or downlink non-access stratum transmission (downlink non-access strategy transport) or connection establishment indication (connection establishment indication), etc.
  • paging paging
  • UEContextResumeResponse terminal device context recovery response
  • connection establishment indication connection establishment indication
  • the access network device After the access network device obtains the first indication, it can determine that the terminal device needs to send uplink data, and then wait for the uplink data sent by the terminal device after sending the downlink data to the terminal device, instead of immediately releasing the context information of the terminal device (UE context) information), or does not immediately suspend the context information of the terminal device, or does not wait for 1.25 seconds (or 60 milliseconds or 10 seconds) to release or suspend the context information of the terminal device, or does not receive the lower layer (lower After successful feedback of layers), the context information of the terminal device is released or suspended, but the context information of the terminal device is still kept in use.
  • UE context context information of the terminal device
  • the access network device may also send a second indication to the terminal device.
  • the second indication enables the terminal device to send the first uplink data after receiving the first message; or, the second indication is used to indicate that the terminal device has uplink data to send; or , The second indication is used to indicate that the terminal device has a downlink data packet to be delivered, and will trigger uplink data transmission of the terminal device.
  • the access network device may send a second paging message including a second indication to the terminal device; or, the access network device may also send the second indication to the terminal device through the first message, That is, the first message carries the second indication.
  • FIG. 4 it is a schematic diagram of data transmission provided by an embodiment of the present application.
  • the first message is message 4 as an example
  • the second message is a first paging message as an example for description, and other details will not be repeated.
  • the process shown in FIG. 4 is a possible implementation of the process shown in FIG. 3, and is not a limitation of FIG.
  • Step 401 The gateway device sends a downlink data notification message (downlink data notification) to the core network device, which is used to indicate that downlink data arrives.
  • a downlink data notification message downlink data notification
  • the downlink data notification message may include a first indication.
  • first indication For the specific meaning of the first indication, reference may be made to the description in step 301, and details are not described herein again.
  • the gateway device may refer to a service gateway (serving gateway, SGW) and other devices.
  • SGW serving gateway
  • Step 402 The core network device receives the downlink data notification message, and sends a first paging message to the access network device, which is used to instruct the access network device to page the terminal device.
  • the core network device may carry the first indication in the downlink data notification message in the first paging message and send it to the access network device.
  • the access network device also sends a paging message.
  • the paging message sent by the core network device is called a first paging message
  • the paging message sent by the access network device is called a second Paging message.
  • the first paging message may also include other information, such as the identifier of the terminal device that needs to be paged, for example, the identifier of the terminal device may refer to the international mobile user identification code of the terminal device (international mobile subscriber Identification number (IMSI), temporary mobile subscriber identity (temporary mobile subscriber identity, TMSI) or S-TMSI, etc., which will not be repeated here.
  • IMSI international mobile subscriber Identification number
  • TMSI temporary mobile subscriber identity
  • S-TMSI S-TMSI
  • Step 403 The access network device sends a second paging message to the terminal device according to the received first paging message, and the second paging message is used to page the terminal device.
  • the first paging message received by the access network device includes the identifier of the terminal device, and the access network device may determine the terminal device that needs to be paged according to the identifier.
  • the second paging message sent by the access network device also includes information such as the identification of the terminal device.
  • the second paging message may include a first indication, and the second paging message may also include other information, which is not repeated here.
  • Step 404 After receiving the second paging message sent by the access network device, the terminal device sends a random access preamble (preamble) to the access network device to initiate a random access process.
  • a random access preamble preamble
  • the terminal device in the idle state may periodically monitor whether the access network device sends the second paging message, and when the terminal device listens to the second paging message sent by the access network device, When the identifier of the terminal device is included, the terminal device may determine that the second paging message is used to page the terminal device, thereby confirming that downlink data will arrive on the network side, and then initiate a random access process to the access network device.
  • the terminal device determines that the downlink data needs to be sent to the access network device after receiving the downlink data according to the first indication.
  • Step 405 The access network device sends a random access response (RAR) message to the terminal device according to the received random access preamble.
  • RAR random access response
  • the RAR message may carry information such as uplink grant (UL), which is used to schedule the time-frequency resources for the terminal device to send the message 3.
  • UL uplink grant
  • Step 406 The terminal device sends message 3 to the access network device.
  • the message 3 is sent through the time-frequency resource indicated by the random access response message.
  • the message 3 may include an RRC connection recovery request (RRC connection resume request) message for requesting to restore the RRC connection.
  • Message 3 may include information such as a Resume ID (Resume ID) and a first indication, which will not be repeated here.
  • the message 3 includes an RRC connection establishment request (RRC connection request) message or an RRC early transmission data request (RRC Early Data Request) message, which includes a UE identifier, such as S-TMSI.
  • the first paging message received by the access network device includes the identification of the terminal device, for example, S-TMSI, and in step 404, if the terminal device The RRC connection restoration request sent by the device carries the restoration identifier, and the access network device cannot determine that the restoration identifier corresponds to the same terminal device in the first paging message received by the access network device, so
  • message 3 may carry a first indication, so that the access network device determines that the first indication corresponds to the same terminal device as the identifier of the terminal device in the second paging message received by the access network device.
  • Step 407 The access network device sends a message 4 to the terminal device, where the message 4 includes the first downlink data of the terminal device.
  • message 4 may be an RRC connection release (RRC connection release) message or an RRC early transmission data complete (RRC Early Data Complete) message. Both messages carry RRC connection release information.
  • the RRC connection release information is used To release the RRC connection of the terminal device. After the terminal device receives the RRC connection release message or the RRC early data completion message, the terminal device thinks that the access network device will not schedule the terminal device, so after a series of bottom layer confirmations, the terminal device will release its context information, Or suspend its context information.
  • the access network device since the access network device determines that the terminal device will send the uplink data after sending a downlink data packet according to the first instruction, the access network device sends the RRC connection release message or the RRC early transmission After the data completion message, the context information of the terminal device is not immediately released, or the context information of the terminal device is not suspended immediately, but the context information of the terminal device is still kept in use.
  • the access network device may start a timer when sending the message 4, and the timer duration is the first duration.
  • the terminal device when receiving the message 4, the terminal device can start a timer, and the time duration of the timer is the first duration. When the timer expires, the access network device or terminal device can release the RRC connection.
  • the access network device may directly instruct the terminal device to receive the first time after receiving the message 4 Keeping the RRC connection internally may also indirectly instruct the terminal device to keep the RRC connection for the first time period after receiving the message 4.
  • the message 4 may include a second indication, and the second indication is used to indicate the first duration.
  • the terminal device receives the message 4, it determines the first duration according to the second instruction, and maintains the RRC connection within the first duration, and releases the RRC connection when the first duration times out.
  • the message 4 does not include the second indication.
  • the message 4 may be an RRC connection release message or an RRC connection recovery ( RRC connection), which carries RRC connection release information and RRC connection recovery information, and the RRC connection recovery information is used to recover the RRC connection of the terminal device.
  • RRC connection RRC connection recovery
  • the terminal device determines that message 4 carries both RRC connection release information and RRC connection recovery information, it may determine that the RRC connection needs to be maintained within the first duration, and release the RRC connection when the first duration expires.
  • the terminal device may restore the RRC connection or release the RRC connection according to the uplink resources scheduled by the access network device. Specifically, after the terminal device receives the first scheduling information sent by the access network device, if the terminal device determines that the first uplink data can be sent by using the uplink resources scheduled by the first scheduling information, the terminal device is released.
  • RRC connection with the access network device correspondingly, if the terminal device determines that the uplink resource that cannot be scheduled through the first scheduling information cannot send the first uplink data, or through the first scheduling After sending the first uplink data after sending the first uplink data by the information scheduling uplink resource, according to the RRC connection recovery information in message 4, an RRC connection recovery completion message is sent to the access network device, and the RRC connection recovery completion message It is used to confirm the restoration of the RRC connection.
  • the first indication may be carried in the message 4.
  • message 4 may carry the first indication.
  • the second instruction may be carried, or the second instruction may not be carried, which is not limited in this embodiment of the present application.
  • Step 408 The terminal device sends the first uplink data to the access network device.
  • the access network device directly sends first scheduling information to the terminal device within a first time period after sending message 4, and the first scheduling information is used to schedule uplink resources.
  • the first scheduling information may be carried in a physical downlink control channel (physical downlink control channel, PDCCH).
  • the terminal device may send the first uplink data to the access network device through the uplink resource scheduled by the first scheduling information.
  • PDCCH physical downlink control channel
  • the terminal device may also send a resource request message to the access network device.
  • the resource request message is used to request uplink resources.
  • the resource request message may be an uplink scheduling request (SR). ) Or buffer status report (buffer status report, BSR) and other messages.
  • the access network device may send first scheduling information to the terminal device according to the resource request message, where the first scheduling information is used to schedule uplink resources.
  • the terminal device may thus send the first uplink data to the access network device through the uplink resource scheduled by the first scheduling information.
  • the terminal device receives the first scheduling information of the access network device, and sends the first uplink data according to the uplink resource scheduled by the first scheduling information.
  • the first uplink data may be data of the first downlink data in the response message 4, or may be data that is not associated with the first downlink data.
  • Step 409 The access network device sends the first uplink data of the terminal device to the gateway device.
  • step 407 and step 408 there may be multiple messages.
  • FIG. 5 it is a schematic diagram of data transmission provided by an embodiment of the present application.
  • Step 501 The access network device sends a message 4 to the terminal device, where the message 4 includes the first downlink data of the terminal device.
  • the terminal device When the terminal device receives the message 4, it can start a timer, and the timer duration is the first duration.
  • the access network device can start the timer, and the timer duration is the first duration.
  • Message 4 may be a medium access control (MAC) protocol data unit (protocol data access unit, PDU) multiplexed together with RRC messages and downlink data.
  • MAC medium access control
  • Step 502 The terminal device sends a hybrid automatic repeat request (HARQ) -acknowledgement (ACK) to the access network device to confirm the correct receipt of the MAC PDU.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgenowledgement
  • the first downlink data may also be in AM mode, so in step 502
  • the terminal device When receiving the RRC connection release message and the first downlink data, the terminal device also needs to send an automatic repeat request (ARQ) -ACK to the access network device, and the resource to send the ARQ-ACK requires a physical downlink control channel (Physical Downlink Control Channel, PDCCH) scheduling, which also includes step 503 at this time.
  • ARQ automatic repeat request
  • PDCCH Physical Downlink Control Channel
  • Step 503 The access network device sends a PDCCH to the terminal device, where the PDCCH is used to schedule the terminal device to send ARQ-ACK resources.
  • Step 504 The terminal device sends an ARQ-ACK to the access network device through the resources scheduled by the PDCCH.
  • Step 505 The access network device sends a PDCCH scheduling uplink data to the terminal device, that is, sends the first scheduling information.
  • Step 506 The terminal device sends the first uplink data to the access network device according to the scheduling information of the PDCCH in step 505.
  • the first uplink data is multiplexed into MAC PDU.
  • Step 507 After receiving the MAC PDU of the first uplink data, the access network device sends a HARQ-ACK to the terminal device.
  • Step 508 The access network device sends a PDCCH scheduling ARQ-ACK to the terminal device.
  • Step 509 The access network device sends an ARQ-ACK to the terminal device.
  • Step 510 When receiving the ARQ-ACK, the terminal device sends the HARQ-ACK to the access network device.
  • both the terminal device and the network device can release the RRC connection.
  • the core network device may also carry the first indication through the terminal device context recovery response (UE context response) message.
  • UE context response terminal device context recovery response
  • the first message is message 4 as an example
  • the second message is a terminal device context recovery response message as an example for description, and other details will not be repeated.
  • Step 601 The gateway device sends a downlink data notification message to the core network device.
  • the downlink data notification message does not include the first indication.
  • Step 602 The core network device receives the downlink data notification message and sends a first paging message to the access network device, which is used to instruct the access network device to page the terminal device.
  • the first paging message does not carry the first indication.
  • Step 603 The access network device sends a second paging message to the terminal device according to the received first paging message, and the second paging message is used to page the terminal device.
  • the second paging message does not carry the first indication.
  • Step 604 After receiving the second paging message sent by the access network device, the terminal device sends a random access preamble to the access network device, which is used to initiate a random access process.
  • Step 605 The access network device sends a random access response message to the terminal device according to the received random access preamble.
  • Step 606 The terminal device sends message 3 to the access network device.
  • Step 607 The access network device sends a terminal device context recovery request (UE context recovery request) message to the core network device, which is used to request to restore the context of the terminal device.
  • UE context recovery request terminal device context recovery request
  • Step 608 The core network device sends a modify bearer request (modify bearer request) message to the gateway device.
  • Step 609 The gateway device returns a modify bearer response (modify bearer response) message to the core network device, thereby completing the modification of the bearer.
  • modify bearer response modify bearer response
  • the first indication is carried in the modified bearer response message.
  • the specific meaning of the first indication reference may be made to the description in step 301, which will not be repeated here.
  • Step 610 The core network device sends a terminal device context recovery response message to the access network device.
  • the context restoration response message carries the first indication.
  • the gateway device may deliver the first downlink data of the terminal device, which includes step 611.
  • Step 611 The gateway device sends the first downlink data of the terminal device to the access network device.
  • process shown in FIG. 4 also includes steps 607 to 611. For convenience of description, the above steps are not described in the process shown in FIG. 4.
  • Step 612 The access network device sends a message 4 to the terminal device, where the message 4 includes the first downlink data of the terminal device.
  • Step 613 The terminal device sends the first uplink data to the access network device.
  • the access network device sends first scheduling information to the terminal device within a first time period after sending message 4, and the first scheduling information is used to schedule uplink resources.
  • the terminal device receives the first scheduling information of the access network device, and sends the first uplink data according to the uplink resource scheduled by the first scheduling information.
  • Step 614 The access network device sends the first uplink data of the terminal device to the gateway device.
  • steps 601 to 606 and 612 to 614 reference may be made to the process shown in FIG. 4, and details are not described herein again.
  • the access network device may also carry the first indication through the downlink data, that is, in the process shown in FIG. 6, the first indication is carried in step 611.
  • the first indication is carried in step 611.
  • FIG. 7 For details, refer to the process shown in FIG. 7.
  • Step 701 The gateway device sends a downlink data notification message to the core network device.
  • the downlink data notification message does not include the first indication.
  • Step 702 The core network device receives the downlink data notification message and sends a first paging message to the access network device, which is used to instruct the access network device to page the terminal device.
  • the first paging message does not carry the first indication.
  • Step 703 The access network device sends a second paging message to the terminal device according to the received first paging message, and the second paging message is used to page the terminal device.
  • the second paging message does not carry the first indication.
  • Step 704 After receiving the second paging message sent by the access network device, the terminal device sends a random access preamble to the access network device, which is used to initiate a random access process.
  • Step 705 The access network device sends a random access response message to the terminal device according to the received random access preamble.
  • Step 706 The terminal device sends message 3 to the access network device.
  • Step 707 The access network device sends a terminal device context restoration request message to the core network device, which is used to request to restore the context of the terminal device.
  • Step 708 The core network device sends a modify bearer request message to the gateway device.
  • Step 709 The gateway device returns a modify bearer response message to the core network device, thereby completing the modification of the bearer.
  • the modified bearer response message does not carry the first indication.
  • Step 710 The core network device sends a terminal device context recovery response message to the access network device.
  • the gateway device can then deliver the downlink data of the terminal device, which includes step 711.
  • Step 711 The gateway device sends the first downlink data of the terminal device to the access network device.
  • the downlink data carries a first indication.
  • the first indication For the specific meaning of the first indication, reference may be made to the description in step 301, and details are not described herein again.
  • a possible implementation manner is that the first downlink data and the first indication are encapsulated in a data packet, and when the gateway device sends the first downlink data to the access network device, the first indication is also sent to the interface Network access equipment.
  • Step 712 The access network device sends a message 4 to the terminal device, where the message 4 includes the first downlink data of the terminal device.
  • Step 713 The terminal device sends the first uplink data to the access network device.
  • the access network device sends first scheduling information to the terminal device within a first time period after sending message 4, and the first scheduling information is used to schedule uplink resources.
  • the terminal device receives the first scheduling information of the access network device, and sends the first uplink data according to the uplink resource scheduled by the first scheduling information.
  • the uplink data may be the uplink data of the downlink data in the response message 4.
  • Step 714 The access network device sends the first uplink data of the terminal device to the gateway device.
  • steps 701 to 706 and steps 712 to 714 reference may be made to the flow shown in FIG. 4, and details are not described herein again.
  • the terminal device in addition to the access network device may send the first indication, the terminal device may also send the first indication to the access network device, thereby instructing the access network device to receive the uplink data of the terminal device, described in detail below.
  • FIG. 8 it is a schematic flowchart of a data transmission method provided by an embodiment of the present application. Referring to Figure 8, the method includes:
  • Step 801 The access network device receives the first indication from the terminal device.
  • step 301 For the specific meaning of the first indication, reference may be made to the description in step 301, which will not be repeated here.
  • the terminal device may send the first indication to the access network device in various ways, for example, the terminal device sends the random access preamble corresponding to the first indication to the access network device; or The terminal device sends a third message to the access network device, where the third message includes the first indication; where the third message is an RRC connection recovery request message or an RRC early transmission data request message.
  • the second message may be a random access preamble or a radio resource control RRC connection recovery request message or an RRC early transmission data request message.
  • Step 802 The access network device sends a first message to the terminal device during the random access process.
  • the access network device may send the downlink data through message 4 in the random access process.
  • the access network device may send the downlink data through message 4 in the random access process.
  • Step 803 The terminal device receives the first message sent by the access network device to the terminal device during the random access process.
  • the terminal device receives the downlink data sent by the access network device during the random access process, and sends the downlink data to the access within a first time period after receiving the downlink data
  • the network equipment sends upstream data.
  • Step 804 The terminal device sends the first uplink data to the access network device, and releases the connection.
  • the access network device receives the first uplink data sent by the terminal device within a first time period after sending downlink data to the terminal device during the random access process.
  • Step 805 In response to the first indication, the access network device receives the first uplink data from the terminal device and releases the connection after sending the first message to the terminal device during the random access process .
  • the access network device releases the connection after the first duration of sending the first message.
  • the access network device determines that the terminal device has uplink data to send according to the first instruction, so that after sending message 4, it can continue to wait for the uplink data of the terminal device instead of directly releasing the RRC connection, thereby avoiding the terminal device Initiate the RRC connection again to improve data transmission efficiency.
  • steps 801 to 805 For other contents of steps 801 to 805, reference may be made to the processes shown in FIG. 3 to FIG. 7, and details are not described herein again.
  • the access network device may not only send the downlink data in message 4, but also send the downlink data to the terminal device in the paging message.
  • Downlink data is sent between the paging message and message 3, so that the terminal device is scheduled to transmit uplink data in message 3 through message 2, thereby improving data transmission efficiency, which will be described in detail below.
  • FIG. 9 it is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • the method includes:
  • Step 901 The access network device receives the first indication from the terminal device or the core network device.
  • step 301 For the specific meaning of the first indication, please refer to the description in step 301, which will not be repeated here.
  • step 301 and step 801 For details on how the access network device receives the first indication from the terminal device or the core network device, reference may be made to the description in step 301 and step 801, and details are not described herein again.
  • Step 902 The access network device sends first downlink data to the terminal device.
  • the first downlink data may be sent through a second paging message, or the first downlink data may be sent independently after the paging message.
  • the access network device may also carry the first downlink data in the message 2, or send the first downlink data after the message 2, which is not limited in this embodiment of the present application.
  • Step 903 The terminal device receives the first downlink data sent by the access network device.
  • Step 904 In response to the first indication, the access network device sends a message 2 to the terminal device during the random access process.
  • the message 2 includes an uplink resource indicator, and the uplink resource indicator is used for scheduling uplink resources. Or, the message 2 carries an uplink grant (UpLink) for EDT.
  • UpLink uplink grant
  • the terminal device can send the message 3 including the first uplink data through the uplink resource scheduled by the uplink authorization.
  • Step 905 The terminal device receives the message 2 sent by the access network device during the random access process. If the terminal device determines that the uplink resource indicates that the scheduled uplink resource is greater than a threshold or the message 2 carries For the uplink authorization of EDT, a message 3 including the first uplink data is sent to the access network device through the uplink resource.
  • the terminal device determines that the uplink resource indicates that the scheduled uplink resource is less than or equal to a threshold, it sends a message 3 that does not include the first uplink data to the access network device through the uplink resource.
  • the threshold value shown may be determined according to actual conditions, for example, the threshold value is the minimum transport block size (TBS) required for the message 3 including the first uplink data.
  • TBS transport block size
  • Step 906 The access network device receives the message 3 including the first uplink data sent by the terminal device.
  • the first uplink data is sent through the uplink resource indication scheduled uplink resource.
  • the access network device sends a message 4 to the terminal device, where the message 4 is used to instruct to release the connection between the terminal device and the access network device; correspondingly, the access network device releases the location ⁇ Connection. After receiving the message 4, the terminal device releases the connection.
  • the access network device sends the first downlink data through the second paging message.
  • FIG. 10 it is a data transmission flowchart provided by an embodiment of the present application.
  • Step 1001 The gateway device sends a downlink data notification message to the core network device.
  • the downlink data notification message carries the first indication.
  • Step 1002 The core network device receives the downlink data notification message, and sends a first paging message to the access network device to instruct the access network device to page the terminal device.
  • the first paging message carries the first indication.
  • Step 1003 The access network device sends a second paging message to the terminal device according to the received first paging message, where the second paging message is used to page the terminal device.
  • the second paging message carries the first indication and the downlink data of the terminal device.
  • Step 1004 The terminal device receives the paging message sent by the access network device, and sends a preamble to the access network device according to the first indication or the received downlink data, and the preamble is used to initiate EDT.
  • the terminal device After the terminal device receives the downlink data in the paging message, if it is determined that uplink data needs to be sent, it can send a random access preamble specifically used to initiate the EDT process, thereby initiating the EDT process to transmit the uplink data through the EDT process; If the terminal device does not need to send uplink data, it can initiate a legacy random access process through a random access preamble.
  • Step 1005 The access network device sends a message 2, that is, a random access response message, to the terminal device according to the received random access preamble.
  • the message 2 carries the uplink authorization for EDT.
  • the random access response message may carry an uplink authorization, that is, an uplink resource indication, which is used to schedule the terminal device to send the uplink resource of message 3.
  • Step 1006 The terminal device sends a message 3 to the access network device.
  • the message 3 is sent through the time-frequency resource indicated by the random access response message.
  • the terminal device determines that the uplink resource indicated in message 2 indicates that the scheduled uplink resource is greater than the threshold, that is, the terminal device determines that the uplink resource scheduled by the uplink resource indication can send message 3 including the uplink data, then message 3 carries the first uplink data.
  • Step 1007 The access network device sends a message 4 to the terminal device.
  • the access network device may also independently send the downlink data after sending the second paging message.
  • the flow shown in FIG. 9 is described below with reference to FIG. 11.
  • FIG. 11 it is a data transmission flowchart provided by an embodiment of the present application.
  • Step 1101 The gateway device sends a downlink data notification message to the core network device.
  • the downlink data notification message carries the first indication.
  • Step 1102 The core network device receives the downlink data notification message, and sends a first paging message to the access network device to instruct the access network device to page the terminal device.
  • the first paging message carries the first indication.
  • Step 1103 The access network device sends a second paging message to the terminal device according to the received first paging message, and the second paging message is used to page the terminal device.
  • the second paging message carries the first indication, but does not carry the downlink data of the terminal device.
  • Step 1104 The access network device sends downlink data to the terminal device.
  • Step 1104 may also be before step 1107, which is not limited in this embodiment of the present application.
  • Step 1105 The terminal device receives the paging message sent by the access network device, and sends a preamble to the access network device according to the first indication or the received downlink data.
  • the preamble is used to initiate EDT.
  • Step 1106 The access network device sends a message 2, that is, a random access response message, to the terminal device according to the received random access preamble.
  • the message 2 carries the uplink authorization for EDT.
  • the random access response message may carry an uplink authorization, that is, an uplink resource indication, which is used to schedule the terminal device to send the uplink resource of message 3.
  • Step 1107 The terminal device sends message 3 to the access network device.
  • the terminal device determines that the uplink resource indicated in message 2 indicates that the scheduled uplink resource is greater than the threshold, that is, the terminal device determines that the uplink resource scheduled by the uplink resource indication can send message 3 including the uplink data, then message 3 carries the first uplink data.
  • Step 1108 The access network device sends a message 4 to the terminal device.
  • an embodiment of the present application provides a schematic structural diagram of a data transmission device.
  • the data transmission apparatus may be used to perform the actions of the access network device in the foregoing method embodiments.
  • the apparatus 1200 includes a transceiver unit 1201 and a processing unit 1202.
  • the transceiving unit 1201 is configured to receive a first indication from a terminal device or a core network device; in response to the first indication, the access network device sends a first message to the terminal device in a random access process, from The terminal device receives first uplink data, and the first message is used to instruct to release the connection between the terminal device and the access network device;
  • the processing unit 1202 is configured to release the connection.
  • the first indication is used to indicate that the terminal device has uplink data to send; or, the first indication is used to indicate that the terminal device has downlink data packets to be sent, and triggers Sending uplink data of the terminal device.
  • the first message includes the first downlink data of the terminal device.
  • the transceiver unit 1201 is specifically configured to: receive a second message from the core network device, where the second message includes the first indication; and the second message includes a first paging message , Or the UE context recovery response message.
  • the transceiver unit 1201 is specifically used to:
  • the third message includes a radio resource control RRC connection recovery request message or an RRC early transmission data request message.
  • the transceiver unit 1201 is also used to:
  • the transceiver unit 1201 is also used to:
  • the second instruction is used to indicate that the terminal device has uplink data to send; or, the second instruction is used to indicate that the terminal device has downlink data packets to be sent, And it will trigger the uplink data sending of the terminal device.
  • the transceiver unit 1201 is specifically used to:
  • the access network device sends the second to the terminal device through the first message Instructions.
  • the second indication includes RRC connection restoration information.
  • the second indication is also used to indicate the first duration;
  • the transceiver unit 1201 is specifically used to:
  • the processing unit 1202 is specifically configured to release the connection after the first duration.
  • the first message is an RRC connection release message.
  • FIG. 13 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
  • the data transmission device shown in FIG. 13 may be a hardware circuit implementation of the data transmission device shown in FIG. 12.
  • the data transmission device may be applicable to the flowcharts shown in FIG. 3 to FIG. 11 to perform the functions of the access network device in the above method embodiments.
  • FIG. 13 shows only the main components of the data transmission device.
  • the data transmission device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and / or Or discrete devices.
  • the data transmission device 1300 includes a processor 1301, a memory 1302, a transceiver 1303, an antenna 1304, and the like.
  • the processor 1301 is mainly used to process the communication protocol and communication data, and to control the entire wireless data transmission device, execute a software program, and process the data of the software program, for example, to support the wireless data transmission device to execute Described actions etc.
  • the memory 1302 is mainly used to store software programs and data.
  • the transceiver 1303 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the antenna 1304 is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the transceiver 1303 is configured to receive the first indication from the terminal device or the core network device; in response to the first indication, after the access network device sends the first message to the terminal device during the random access process, from The terminal device receives first uplink data, and the first message is used to instruct to release the connection between the terminal device and the access network device;
  • the processor 1301 is configured to release the connection.
  • the first indication is used to indicate that the terminal device has uplink data to send; or, the first indication is used to indicate that the terminal device has downlink data packets to be sent, and triggers Sending uplink data of the terminal device.
  • the first message includes the first downlink data of the terminal device.
  • the transceiver 1303 is specifically configured to: receive a second message from the core network device, where the second message includes the first indication; and the second message includes a first paging message , Or the UE context recovery response message.
  • the transceiver 1303 is specifically used for:
  • the third message includes a radio resource control RRC connection recovery request message or an RRC early transmission data request message.
  • the transceiver 1303 is also used to:
  • the transceiver 1303 is also used to:
  • the second instruction is used to indicate that the terminal device has uplink data to send; or, the second instruction is used to indicate that the terminal device has downlink data packets to be sent, And it will trigger the uplink data sending of the terminal device.
  • the transceiver 1303 is specifically used for:
  • the access network device sends the second to the terminal device through the first message Instructions.
  • the second indication includes RRC connection restoration information.
  • the second indication is also used to indicate the first duration;
  • the transceiver 1303 is specifically used to:
  • the processor 1301 is specifically configured to release the connection after the first duration.
  • the first message is an RRC connection release message.
  • an embodiment of the present application provides a schematic structural diagram of a data transmission device.
  • the data transmission apparatus may be used to perform the actions of the terminal device in the foregoing method embodiments.
  • the apparatus 1400 includes a transceiver unit 1401 and a processing unit 1402.
  • the transceiving unit 1401 is configured to receive a first message from the access network device during the random access process, the first message is used to instruct to release the connection between the terminal device and the access network device; Send the first uplink data;
  • the processing unit 1402 is configured to release the connection.
  • the transceiver unit 1401 is further configured to: send a first indication to the access network device.
  • the first indication is used to indicate that the terminal device has uplink data to send; or, the first indication is used to indicate that the terminal device has downlink data packets to be sent, and triggers Sending uplink data of the terminal device.
  • the first message includes the first downlink data of the terminal device.
  • the transceiver unit 1401 is specifically used to:
  • the third message is a radio resource control RRC connection recovery request message or an RRC early transmission data request message.
  • the transceiver unit 1401 is also used to:
  • the second indication enabling the terminal device to send the first uplink data after receiving the first message.
  • the transceiver unit 1401 is also used to:
  • the second indication is used to indicate that the terminal device has uplink data to send; or, the second indication is used to indicate that the terminal device has a downlink data packet to download And will trigger the uplink data transmission of the terminal device.
  • the transceiver unit 1401 is specifically used to:
  • the terminal device Receiving a second paging message from the access network device, the second paging message including the second indication; or, the terminal device receiving the second paging message from the access network device through the first message The second instruction.
  • the second indication includes RRC connection restoration information.
  • the second indication is also used to indicate the first duration;
  • the transceiver unit 1401 is specifically used to:
  • the processing unit 1402 is specifically configured to release the connection after the first duration.
  • the first message is an RRC connection release message.
  • FIG. 15 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
  • the data transmission device shown in FIG. 15 may be a hardware circuit implementation of the data transmission device shown in FIG. 14.
  • the data transmission device can be applied to the flowcharts shown in FIG. 3 to FIG. 11 to perform the functions of the terminal device in the foregoing method embodiments.
  • FIG. 15 shows only the main components of the data transmission device.
  • the data transmission device may be a terminal device or a device in the terminal device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and / Or discrete devices.
  • the data transmission device 1500 includes a processor 1501, a memory 1502, a transceiver 1503, an antenna 1504, and an input / output device 1505.
  • the processor 1501 is mainly used to process the communication protocol and communication data, and control the entire wireless data transmission device, execute a software program, and process the data of the software program, for example, to support the wireless data transmission device to execute the above method embodiments. Described actions etc.
  • the memory 1502 is mainly used to store software programs and data.
  • the transceiver 1503 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the antenna 1504 is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the input and output device 1505, such as a touch screen, a display screen, and a keyboard, is mainly used to receive data input by the user and output data to the user.
  • the transceiver 1503 is configured to receive a first message from the access network device during the random access process, where the first message is used to instruct to release the connection between the terminal device and the access network device; Send the first uplink data;
  • the processor 1501 is configured to release the connection.
  • the transceiver 1503 is further configured to: send a first indication to the access network device.
  • the first indication is used to indicate that the terminal device has uplink data to send; or, the first indication is used to indicate that the terminal device has downlink data packets to be sent, and triggers Sending uplink data of the terminal device.
  • the first message includes the first downlink data of the terminal device.
  • the transceiver 1503 is specifically used for:
  • the third message is a radio resource control RRC connection recovery request message or an RRC early transmission data request message.
  • the transceiver 1503 is also used to:
  • the second indication enabling the terminal device to send the first uplink data after receiving the first message.
  • the transceiver 1503 is also used to:
  • the second indication is used to indicate that the terminal device has uplink data to send; or, the second indication is used to indicate that the terminal device has a downlink data packet to download And will trigger the uplink data transmission of the terminal device.
  • the transceiver 1503 is specifically used for:
  • the terminal device Receiving a second paging message from the access network device, the second paging message including the second indication; or, the terminal device receiving the second paging message from the access network device through the first message The second instruction.
  • the second indication includes RRC connection restoration information.
  • the second indication is also used to indicate the first duration;
  • the transceiver 1503 is specifically used to:
  • the processor 1501 is specifically configured to release the connection after the first duration.
  • the first message is an RRC connection release message.
  • the embodiments of the present application provide a method for setting parameters.
  • PDCP Packet Data Aggregation Protocol, Packet Data Convergence Protocol
  • PDCP Packet Data Aggregation Protocol
  • repetitive transmission can be activated when repetitive transmission is required, and can be deactivated when repetitive transmission is not required.
  • Repeated transmission can be used for CA (Carrier Aggregation) or DC (Dual-connectivity).
  • CA Carrier Aggregation
  • DC Dual-connectivity
  • one PDCP entity can correspond to multiple RLC (Radio Link Control, Radio Link Control) entities.
  • a PDCP entity is associated with a DRB (Data Radio Bearer), and an RLC entity is associated with a logical channel.
  • the allowedServingCells parameter can be configured, and the allowedServingCells parameter is used to indicate which cells can be used by the logical channel.
  • the allowedServingCells parameter of the logical channel corresponding to the PDCP entity may or may not be suspended (it may be understood as continuing to apply the allowedServingCells parameter or no longer applying the allowedServingCells parameter).
  • whether the allowedServingCells parameter configuration is suspended can be determined according to the characteristics of the service or DRB (such as service type, service QoS, etc.).
  • the UE may reuse some parameters to determine whether the allowedServingCells parameter is suspended.
  • the network side does not need to add additional signaling to inform the UE whether to suspend the allowedServingCells parameter.
  • the multiplexed parameters may include: ID (Identity) of DRB, ID of RLC entity, and ID of logical channel. The following examples illustrate:
  • Example 1 after PDCP repeated transmission of a certain DRB is deactivated, when at least one of the following conditions is met, the UE determines that the allowedServingCells parameter of the logical channel corresponding to the DRB is suspended:
  • the ID of the logical channel is greater than the IDs of other logical channels belonging to the same DRB;
  • the modulus of the integer Y1 is equal to the integer Z1.
  • Example 2 After PDCP repeated transmission of a certain DRB is deactivated, when at least one of the following conditions is met, the UE determines that the allowedServingCells parameter of the logical channel corresponding to the DRB is suspended:
  • the ID of the logical channel is less than the IDs of other logical channels belonging to the same DRB;
  • the modulus of the integer Y2 is not equal to the integer Z2.
  • Example 3 When at least one of the following conditions is met, the UE determines that the allowedServingCells parameter of the logical channel corresponding to a DRB is not suspended, that is, the parameter is applied:
  • the ID of the logical channel is greater than the IDs of other logical channels belonging to the same DRB;
  • the modulus of the integer Y3 is equal to the integer Z3.
  • Example 4 when at least one of the following conditions is met, the UE determines that the allowedServingCells parameter of the logical channel corresponding to a DRB is not suspended, that is, the parameter is applied:
  • the ID of the logical channel is less than the IDs of other logical channels belonging to the same DRB;
  • the modulus of the integer Y4 is not equal to the integer Z4.
  • Threshold or integers A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V in the above example , W, X, Y1, Y2, Y3, Y4, Z1, Z2, Z3, Z4 are configured by the network or predefined by the protocol.
  • the DRB is a DRB configured with CA (Carrier Aggregation) or DC (Dual-connectivity) PDCP repeated transmission; or, the DRB may be configured with PDCP repeated transmission
  • CA Carrier Aggregation
  • DC Dual-connectivity
  • the RLC entities associated with the DRB belong to the same MAC entity or belong to different MAC entities.
  • a communication method including:
  • the terminal device receives the ID of the DRB from the network device, or the ID of the RLC entity corresponding to the DRB, or the ID of the logical channel corresponding to the RLC entity;
  • the terminal device determines whether to apply the allowedServingCells parameter according to the ID of the DRB, or the ID of the RLC entity, or the ID of the logical channel.
  • the terminal device determining whether to apply the allowedServingCells parameter according to the ID of the DRB, or the ID of the RLC entity, or the ID of the logical channel includes:
  • the terminal device determines whether to apply the allowedServingCells parameter according to the ID of the DRB, the ID of the RLC entity, or the ID of the logical channel.
  • Embodiments of the present application provide a method for requesting resources.
  • the UE When the UE needs to send channel quality information to the network in message 3 of the random access procedure, more transmission resources are required, for example, more than 56 bits. There are both UEs that need to send channel quality information in message 3 and UEs that do not need to send the channel quality information in the network.
  • the UE When the UE needs to send a message 3 carrying channel quality information, it can request a larger resource from the network.
  • the network can allocate message resources of appropriate size according to the request of the UE.
  • the UE needs to send channel quality information in message 3, and / or the UE network allows the UE to send the channel quality information in message 3, and / or When the UE supports sending the channel quality information in the message 3, the UE may select EDT (Early Data Transmission) or a random access preamble sequence corresponding to Group B for random access to notify the network The side allocates appropriate resources for the UE.
  • EDT Electronic Data Transmission
  • a random access preamble sequence corresponding to Group B for random access to notify the network
  • the side allocates appropriate resources for the UE.
  • the UE selects a preamble sequence in a random access resource reserved by the network for EDT to send message 1, that is, sends a random access preamble sequence corresponding to EDT; or the UE selects a preamble sequence belonging to Group B to send message 1, That is, a random access preamble sequence corresponding to Group B is sent.
  • the relevant configuration of Group B such as the random access preamble sequence of Group B, can be configured by the network side.
  • the network side can learn that the UE needs more resources, that is, the network side can allocate sufficient resources for the UE, for example, more than 56 bits.
  • the network side may also refuse to allocate sufficient resources for the UE.
  • the network side may send a random access response to the UE.
  • the random access response includes resource allocation information, and the resource allocation information is used to indicate resources allocated to the UE.
  • the above example can be applied in scenarios where the network side allows the UE to send channel quality information in message 3, or the UE supports sending channel quality information in message 3, or the UE needs to send channel quality information in message 3.
  • a resource request method When the UE needs to send channel quality information in message 3, the UE sends a random access preamble sequence corresponding to EDT or Group B to the base station;
  • the UE receives a random access response in response to the random access preamble from the base station.
  • the network allows the UE to send the channel quality information in the message 3; and / or,
  • the UE supports sending the channel quality information in the message 3.
  • the UE When the network configures multiple narrowband or frequency points for the UE to measure channel quality, the UE needs to report channel quality information of one of the narrowband or frequency points in the message 3 for random access. The network needs to know which narrowband or frequency channel quality information the channel quality information reported by the UE is. At the same time, since the network allows two types of channel measurement criteria: 1) CQI (Channel Quality Indicator, Channel Quality) Indicator; 2) Repetition number (repetition) or aggregation level (aggregation level), the network needs to understand the channel quality reported by the UE The information value is the result of which measurement criterion.
  • CQI Channel Quality Indicator, Channel Quality
  • Repetition number Repetition
  • aggregation level aggregation level
  • the UE reports the channel quality information of at least one narrowband or frequency point in message 3, and the reported channel quality information is the best N or the first N narrowband or frequency channels with the best channel quality among the at least one narrowband or frequency point measured by the UE Channel quality information of the point.
  • N is predefined by network configuration or protocol.
  • the reported channel quality information belongs to the MAC (CE (Medium Access Control Unit, Medium Access Control) Element or RRC (Radio Resource Control, Radio Resource Control)) message.
  • CE Medium Access Control Unit, Medium Access Control
  • RRC Radio Resource Control, Radio Resource Control
  • the UE When the UE reports channel quality information in message 3, it indicates whether the currently reported channel quality information is CQI (Channel Quality Indicator, Channel Quality Indicator) or repetition number (repetition number) or aggregation level (aggregation level).
  • CQI Channel Quality Indicator, Channel Quality Indicator
  • repetition number repetition number
  • aggregation level aggregation level
  • a measurement reporting method including: the UE obtains channel quality information of multiple narrowbands or frequency points through measurement;
  • the UE sends a message 3 to the base station, where the message 3 includes channel quality information of at least one narrowband or frequency point among the multiple narrowband or frequency points, the at least one narrowband or frequency point being the multiple narrowband or frequency points One or N narrowband or frequency points with the best channel quality among frequency points.
  • a measurement reporting method including: the UE obtains channel quality information of a narrowband or frequency point through measurement;
  • the UE sends a message 3 to the base station, and the MAC CE or RRC message of the message 3 includes the identification of the narrowband or frequency point.
  • a measurement reporting method including:
  • the UE obtains channel quality information through measurement
  • the UE sends a message 3 to the base station, the message 3 includes the quality information and a first indication, the first indication is used to indicate the type of the quality information, the type is CQI, number of repetitions, or aggregation level .
  • the UE When the narrowband in which the UE receives the paging message in the connected state is different from the narrowband in which it transmits and receives data, the UE needs to monitor multiple narrowbands at the same time, which in turn leads to increased power consumption of the UE.
  • the narrowband or frequency point at which the UE receives paging messages is called PNB (Paging Narrowband, PNB).
  • PNB Paging Narrowband
  • the PNB is used as the narrowband or frequency point for receiving and sending data or monitoring the C-RNTI (Cell Radio Network Temporary Identifier). That is, when the UE is in the connected state, it receives paging messages or listens to P-RNTI (Paging Radio Network Temporary Identifier) on the narrowband or frequency point of its data transmission and reception;
  • C-RNTI Cell Radio Network Temporary Identifier
  • the UE is a non-BL UE, that is, a bandwidth-reduced Low Complexity UE that does not reduce bandwidth;
  • the UE works in a coverage enhancement mode (CE mode);
  • the network indicates whether the UE receives the paging message on the PNB in the idle state or the narrowband or frequency point on which the UE sends and receives data when in the connected state.
  • a paging method including:
  • the UE When the UE is in the connected state, the UE monitors the C-RNTI scrambled downlink control channel on the narrowband or frequency point corresponding to the P-RNTI scrambled downlink control channel, or the UE monitors the C-RNTI The narrowband or frequency point corresponding to the scrambled downlink control channel is monitored by the P-RNTI scrambled downlink control channel.
  • the UE operates in a coverage enhancement mode CE mode.
  • a paging method including:
  • the base station sends a first indication to the UE, where the first indication is used to indicate:
  • the UE monitors the P-RNTI scrambled downlink control channel on the idle PNB, or,
  • the UE monitors the downlink control channel scrambled by the P-RNTI on a narrowband or frequency point corresponding to the downlink control channel scrambled by the C-RNTI.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer usable program code.
  • a computer usable storage media including but not limited to disk storage, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and / or block diagrams.

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

Abstract

L'invention concerne un procédé et un dispositif de transmission de données. Le procédé comprend les étapes suivantes : un dispositif de réseau d'accès reçoit une première indication provenant d'un dispositif de réseau central ou d'un dispositif terminal, la première indication étant utilisée pour indiquer que le dispositif terminal a besoin de transmettre des données de liaison montante; en réponse à la première indication, le dispositif de réseau d'accès reçoit des premières données de liaison montante provenant du dispositif terminal lorsqu'un premier message est transmis au dispositif terminal dans un processus d'accès aléatoire, le premier message étant utilisé pour indiquer la libération d'une connexion entre le dispositif terminal et le dispositif de réseau; et le dispositif de réseau d'accès libère la connexion.
PCT/CN2018/113576 2018-11-02 2018-11-02 Procédé et dispositif de transmission de données WO2020087484A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103582006A (zh) * 2012-08-03 2014-02-12 英特尔公司 用于3gpp-lte系统中的小数据传输的设备和方法
CN106664511A (zh) * 2014-07-11 2017-05-10 高通股份有限公司 用于无连接接入的方法和装置

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Publication number Priority date Publication date Assignee Title
CN103582006A (zh) * 2012-08-03 2014-02-12 英特尔公司 用于3gpp-lte系统中的小数据传输的设备和方法
CN106664511A (zh) * 2014-07-11 2017-05-10 高通股份有限公司 用于无连接接入的方法和装置

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