WO2018127017A1 - Procédé de communication, et dispositif à réseau - Google Patents

Procédé de communication, et dispositif à réseau Download PDF

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Publication number
WO2018127017A1
WO2018127017A1 PCT/CN2017/120202 CN2017120202W WO2018127017A1 WO 2018127017 A1 WO2018127017 A1 WO 2018127017A1 CN 2017120202 W CN2017120202 W CN 2017120202W WO 2018127017 A1 WO2018127017 A1 WO 2018127017A1
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Prior art keywords
network device
information
data transmission
data unit
sent
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PCT/CN2017/120202
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English (en)
Chinese (zh)
Inventor
耿婷婷
曾清海
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华为技术有限公司
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Publication of WO2018127017A1 publication Critical patent/WO2018127017A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • H04W28/10—Flow control between communication endpoints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/087—Reselecting an access point between radio units of access points

Definitions

  • the present application relates to communication technologies, and in particular, to a communication method and a network device.
  • NR New Radio Access Technology
  • LTE Long Term Evolution
  • the NR cell includes a distributed architecture and a centralized architecture, and the distributed architecture includes a centralized unit (Central), and a plurality of distributed units (DUs).
  • the CU can manage multiple DUs.
  • the centralized architecture is similar to the traditional LTE network architecture, and the NR base station management
  • the mobility of the User Equipment (UE), when the UE moves in the NR cell, may need to switch from one NR base station to another NR base station in order to obtain a better data transmission service.
  • UE User Equipment
  • each DU has an independent Radio Link Control (RLC) layer and/or a Medium Access Control (MAC) layer, and the UE moves within the NR cell.
  • RLC Radio Link Control
  • MAC Medium Access Control
  • the UE disconnects the original DU and resets the RLC layer and/or the MAC layer on the UE side, and according to the handover indication, The data transmission can be continued after the target DU is successfully accessed.
  • the RLC layer and/or the MAC layer reset may cause an interruption of data transmission, thereby affecting the continuity of data transmission.
  • the application provides a communication method and network device to improve the continuity of data transmission.
  • a first aspect of the present application provides a communication method, including:
  • the network device has the same data transmission state information between the first network device and the UE as the first network device, and the second network device can perform data transmission with the UE according to the data transmission state information. In this process, the UE has no perception and improves the continuity of data transmission.
  • the data transmission status information includes information of data units that have not been transmitted by the first network device and/or information of untransmitted data units.
  • the information of the untransmitted data unit includes: sequence information of the untransmitted data unit;
  • the transmitted information of the data unit that has not received the feedback information includes at least one of the following: sequence information of the transmitted data unit that has not received the feedback information, data transmission timer, time information of the hybrid automatic repeat request HARQ process.
  • the data unit transmission confirmation information of the HARQ process the acknowledgement information of the data unit, the maximum transmission state variable, the maximum reception state variable, the transmission state variable, the reception state variable, and the transmission window.
  • it also includes:
  • the second network device receives the configuration information of the UE, and the configuration information of the UE includes at least one of the following configuration parameters:
  • it also includes:
  • the second network device receives the data unit that has not received the feedback information that has been sent by the first network device and/or the untransmitted data unit.
  • receiving a data unit and/or an unsent data unit that has been sent by the first network device and not receiving the feedback information includes:
  • the second network device receives the data unit that has been sent by the first network device sent by the first network device and does not receive the feedback information, and/or the untransmitted data unit.
  • it also includes:
  • the second network device sends an acknowledgement message, where the acknowledgement message is used to indicate that the second network device and the UE are successfully established.
  • the second network device sends a confirmation message, including:
  • the second network device sends the confirmation information to the first network device
  • the second network device sends a confirmation message, including:
  • the second network device sends an acknowledgement message to the third network device.
  • the method further includes:
  • the second network device sends the link release indication information to the first network device, where the link release indication information is used to instruct the first network device to delete the configuration information and/or the data transmission status information of the UE.
  • the second network device receives the data transmission status information, including:
  • the second network device receives data transmission status information sent by the UE.
  • the second network device receives the configuration information of the UE, including:
  • the second network device receives configuration information of the UE sent by the third network device.
  • a second aspect of the present application provides a communication method, including:
  • the first network device acquires data transmission status information, where the data transmission status information is used to indicate data transmission status information of the radio link control protocol stack and/or the medium access control protocol stack in the first network device; the first network device sends Data transfer status information.
  • the second network device is made to have the same data transmission state information between the first network device and the UE as the first network device, and the second network device can perform data transmission with the UE according to the data transmission state information. In this process, the UE has no perception and improves the continuity of data transmission.
  • the data transmission status information includes information of data units that have not been transmitted by the first network device and/or information of untransmitted data units.
  • the information of the untransmitted data unit includes: sequence information of the untransmitted data unit;
  • the transmitted information of the data unit that has not received the feedback information includes at least one of the following: sequence information of the transmitted data unit that has not received the feedback information, data transmission timer, time information of the hybrid automatic repeat request HARQ process.
  • the data unit transmission confirmation information of the HARQ process the acknowledgement information of the data unit, the maximum transmission state variable, the maximum reception state variable, the transmission state variable, the reception state variable, and the transmission window.
  • the first network device sends data transmission status information, including:
  • the first network device sends data transmission status information to the second network device.
  • the first network device sends data transmission status information, including:
  • the first network device sends the data transmission status information to the second network device through the third network device.
  • the method before the first network device sends the data transmission status information to the second network device by using the third network device, the method further includes:
  • the first network device receives the data transmission status report indication information sent by the third network device.
  • it also includes:
  • the first network device sends the transmission resource information to the user equipment UE, where the transmission resource information includes the port number and/or the uplink transmission resource information, and is used to indicate that the UE performs the port and/or the uplink transmission resource information corresponding to the port number with the second network device. data transmission.
  • it also includes:
  • the first network device sends a timer suspension indication information to the UE, and the timer suspension indication information is used to instruct the UE to suspend its data transmission timer.
  • the timer suspension indication information further includes a port number for instructing the UE to listen to the port corresponding to the port number, and restarting the timer after the port receives the data unit.
  • it also includes:
  • the first network device receives the link release indication information, where the link release indication information is used to instruct the first network device to delete the configuration information and/or the data transmission status information of the UE.
  • the first network device receives the link release indication information, including:
  • the first network device receives the link release indication information sent by the third network device.
  • the third aspect of the present application provides a network device, including:
  • the network device provides an air interface for the user equipment UE, and the network device can interact with other network devices, where the network device includes a processor, a memory, and a communication port, and the processor, the memory, and the communication port are all connected through a bus; the memory storage computer executes instructions; The computer executing the memory storage executes instructions to cause the network device to perform data interaction with the other network device and the UE through the communication port to perform the communication method in any one of the above aspects or the first aspect.
  • a fourth aspect of the present application provides a network device, including:
  • the network device provides an air interface for the user equipment UE, and the network device can interact with other network devices, where the network device includes a processor, a memory, and a communication port, and the processor, the memory, and the communication port are all connected through a bus; the memory storage computer executes instructions; The computer executing the memory storage executes instructions to cause the network device to perform data interaction with the other network device and the UE through the communication port to perform the communication method in any of the possible aspects of the second aspect or the second aspect.
  • FIG. 1 is a schematic diagram of a scenario provided by the present application.
  • FIG. 2 is a schematic diagram of another scenario provided by the present application.
  • FIG. 3 is a schematic diagram of still another scenario provided by the present application.
  • FIG. 5 is a schematic flowchart diagram of a communication method provided by the present application.
  • FIG. 6 is a schematic flowchart diagram of another communication method provided by the present application.
  • FIG. 7 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 8 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 9 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 10 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 11 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 12 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 13 is a schematic flowchart diagram of still another communication method provided by the present application.
  • FIG. 14 is a schematic structural diagram of a network device provided by the present application.
  • FIG. 15 is a schematic structural diagram of a network device provided by the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • UMTS Universal Mobile Telecommunication System
  • user equipment includes but is not limited to a mobile station (Mobile Station, MS: Mobile Terminal), a mobile terminal (Mobile Telephone), a mobile phone ( The handset device can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the user device can be a mobile phone (or "cellular" phone) or a computer with wireless communication capabilities, etc., and the user device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the specific type of the network device is not limited, for example, it may be a common base station (such as a NodeB or an eNB), may be a radio remote module, may be a pico, or may be a relay. It can be a centralized network element (Centralized Unit (CU), which can be a distributed network unit (DU), and can be a transmission point (Tra nsmission Point, TP for short) or a transmission receiving point (Transmission). Reception Point (TRP), which can be DU and TP, or any other wireless access device.
  • CU Centralized Unit
  • DU distributed network unit
  • TRP Transmission Point
  • the network device may have a Radio Resource Control (RRC) protocol stack function and/or all or part of a Layer 2 protocol stack function, or the network device may have an RRC protocol stack function and/or all or part of layer 2 Protocol stack and physical layer protocol stack functions.
  • the function of the Layer 2 protocol stack may include at least one of a function in a Packet Data Convergence Protocol (PDCP), an RLC, and a MAC. That is, the layer two protocol stack may be one of PDCP, or RLC, or MAC, or PDCP and RLC, or PDCP and MAC, or RLC and MAC, or PDCP and RLC and MAC.
  • the CU is a network device having RRC and/or PDCP functions
  • the DU is a network device having at least an RLC/MAC protocol stack function
  • the base station is a network device having an RRC, PDCP, RLC, MAC, and/or PHY protocol stack function
  • the CU, DU, and base station are just an exemplary name and are not limited to this name.
  • the network device is CU or DU as an example, and is not limited to this.
  • FIG. 1 is a schematic diagram of a scenario provided by the present application.
  • the scenario includes a CU, a DU, and a TRP.
  • FIG. 1 shows two DUs, which are respectively DU1 and DU2, and the CU manages DU1 and DU2.
  • Each DU manages multiple TRPs.
  • three DUs are managed by each DU as an example, and each TRP has multiple beams.
  • FIG. 2 is a schematic diagram of another scenario provided by the present application.
  • the scenario shown in FIG. 2 includes two CUs, namely, CU1 and CU2, where CU1 manages DU1. , CU2 manages DU2.
  • FIG. 3 is a schematic diagram of still another scenario provided by the present application. As shown in FIG. 3, FIG. 3 is based on the embodiment shown in FIG. 1. The function of the CU and the function of the DU1 are deployed in the same network device (such as a base station). .
  • FIG. 4 is a schematic diagram of still another scenario provided by the present application. As shown in FIG. 4, FIG. 4 is based on the embodiment shown in FIG. 2, and the function of the CU1 and the function of the DU1 are deployed in the same network device, such as the base station 1. The function of CU2 and the function of DU2 are deployed in the same network device, such as base station 2.
  • FIG. 5 is a schematic flowchart of a communication method provided by the present application. As shown in FIG. 5, the embodiment is applied to the scenario shown in FIG. 1.
  • the first network device uses the DU1 as an example
  • the second network device Taking DU2 as an example
  • the third network device takes the CU as an example.
  • the method in this embodiment is as follows:
  • S500 The CU determines to switch from DU1 to DU2 according to the measurement report, or determines to migrate the bearer under the DU1 to the DU2.
  • the bearer of the DU1 is migrated to the DU2, and the part of the bearer under the DU1 is migrated to the DU2.
  • the UE measures the channel quality between DU1 and DU2 and obtains a measurement report. Report the measurement report to the CU.
  • the CU determines whether the UE switches from DU1 to DU2 according to the measurement report, or determines whether to migrate the bearer under DU1 to DU2. If it is determined to switch from DU1 to DU2, or it is determined to migrate the bearer under DU1 to DU2, then S502 is performed.
  • DU1 and DU2 measure the channel quality with the UE, respectively, and obtain a measurement report.
  • DU1 and DU2 report the measurement report to the CU.
  • the CU determines whether the UE switches from DU1 to DU2 according to the measurement report, or determines whether to migrate the bearer under DU1 to DU2. If it is determined to switch from DU1 to DU2, or it is determined to migrate the bearer under DU1 to DU2, then S502 is performed.
  • S502 The CU sends a data transmission status report indication information to the DU1.
  • the data transmission status reporting indication information is used to indicate that the data transmission status between the UE and the UE is reported by the DU1.
  • the data transmission status information is used to indicate data transmission status information of the radio link control and/or the medium access control protocol stack in the DU1.
  • the data transmission status information includes, but is not limited to, at least one of the following: information of a data unit in which the DU1 has transmitted but not received feedback information of the UE to the UE; and information of the data unit that the DU1 has not transmitted to the UE.
  • the data unit is a Protocol Data Unit (PDU) or a Service Data Unit (SDU).
  • the information of the data unit that the DU1 does not send to the UE includes, but is not limited to, sequence information of the untransmitted data unit.
  • the information of the data unit that the DU1 sends to the UE but does not receive the feedback information of the UE includes, but is not limited to, at least one of the following: sequence information of the data unit that has not received the feedback information that has been sent, and data transmission timing Time information of the Hybrid Automatic Repeat Request (HARQ) process, the data unit transmission confirmation information of the HARQ process, the acknowledgement information of the data unit, the maximum transmission state variable, the maximum reception state variable, and the transmission state variable , receive state variables and transfer windows.
  • sequence information of the data unit that has not received the feedback information that has been sent includes, but is not limited to, at least one of the following: sequence information of the data unit that has not received the feedback information that has been sent, and data transmission timing Time information of the Hybrid Automatic Repeat Request (HARQ) process, the data unit transmission confirmation information of the HARQ process, the acknowledgement information of the data unit, the maximum transmission state variable, the maximum reception state variable, and the transmission state variable , receive state variables and transfer windows.
  • HARQ
  • the data transmission timer may be a reordering timer of the RLC or the MAC, or may be a HARQ Round Trip Time (RTT) timer.
  • RTT Round Trip Time
  • S504 The DU1 sends data transmission status information to the CU.
  • the CU is made to obtain data transmission status information between the DU1 and the UE.
  • S506 The CU sends the foregoing data transmission status information to the DU2.
  • the DU2 is made to obtain the data transmission status information between the DU1 and the UE.
  • S508 The CU sends configuration information of the UE to the DU2.
  • the configuration information of the UE includes at least one of the following configuration parameters: a control plane configuration parameter; and a user plane configuration parameter.
  • the control plane configuration parameter includes configuration parameters of a function of the RRC protocol stack; the user plane configuration parameter includes at least one of configuration parameters of a function of a protocol stack such as PDCP, RLC, and MAC.
  • the execution order of S508 and S502-S506 is not limited, and S508 may be performed before S502-S506, may be performed after S502-S506, or may be performed between any two steps S502-S506, Therefore, the application is not limited.
  • the DU2 establishes a control plane entity and/or a user plane entity of the UE according to the data transmission state information and/or the configuration information of the UE.
  • S512 The CU sends, to the DU2, a data unit that has not received the feedback information that has been sent by the DU1 and/or an untransmitted data unit.
  • S514 The DU2 performs data transmission with the UE.
  • the DU2 transmits to the UE the data unit that has not received the feedback information that has been sent by the above DU1 and/or the untransmitted data unit.
  • the CU sends a data transmission status report indication information to the DU1, and instructs the DU1 to report the data transmission status information between the UE and the UE.
  • the CU sends the configuration information of the UE to the DU2 and the data transmission status information reported by the DU1 and the UE.
  • the DU2 is made to obtain the same configuration information of the UE as the DU1 and the data transmission status information between the DU1 and the UE.
  • the DU2 performs data transmission with the UE according to the configuration information of the UE and the data transmission status information between the DU1 and the UE. Therefore, the UE is switched from the DU1 to the DU2, or the UE's bearer under the DU1 is migrated to the DU2, and the UE is not aware in the process, thereby improving the continuity of data transmission.
  • the network device may perform some or all of the steps in the above embodiments, and the steps or operations are merely examples, and the present application may also perform other operations or variations of various operations. Further, the various steps may be performed in a different order as presented in the above embodiments, and it is possible that not all of the operations in the above embodiments are performed.
  • FIG. 6 is a schematic flowchart of another communication method provided by the present application.
  • FIG. 6 is based on the method embodiment shown in FIG. 5, and further includes:
  • S516 The DU2 sends an acknowledgement message to the CU.
  • the confirmation message is used to indicate that the connection establishment of the DU2 and the UE is successful.
  • the methods for determining that the connection between the DU2 and the UE is successfully established include, but are not limited to, the following possible implementation manners:
  • the CU sends the transmission resource information between the UE and the DU2 to the DU1.
  • the DU1 sends the transmission resource information and/or the status report indication information to the UE, where the transmission resource information includes the port number and/or the uplink transmission resource information, and is used to indicate that the UE sends the resource information through the port corresponding to the port number and/or the uplink.
  • the data transmission is performed by the DU2, and the status indication information is used to indicate that the UE reports the feedback information of the data unit sent by the received DU1 according to the transmission resource information.
  • the UE After receiving the transmission resource information, the UE sends feedback information of the data unit transmitted by the DU1 but not sent, the feedback information sent to the DU1 last time, and/or the feedback information of the data unit sent by the subsequent DU2 through the port number.
  • the port and/or uplink transmission resource information is sent to the DU2.
  • the DU2 After receiving the feedback information sent by the UE, the DU2 determines that the connection between the DU2 and the UE is successfully established. In this possible implementation, S516 is performed after S510.
  • the CU sends to the DU2 a data unit in which the DU1 does not receive the feedback information of the UE and/or a data unit in which the DU1 is not transmitted to the UE.
  • the DU2 sends the foregoing data unit to the UE.
  • the UE After receiving the data unit, the UE sends feedback information to the DU2.
  • the DU2 receives the feedback information sent by the UE, and determines that the connection between the DU2 and the UE is successfully established. In this possible implementation, S516 is performed after S514.
  • S518 The CU sends a link release indication information to the DU1.
  • the link release indication information is used to instruct the DU1 to delete configuration information and/or data transmission status information of the UE.
  • S520 The DU1 deletes configuration information and/or data transmission status information of the UE.
  • the CU sends an acknowledgment message to the CU, so that the CU learns that the connection between the UE and the UE is successfully established, thereby instructing the DU1 to delete the configuration information and/or the data transmission status information of the UE.
  • the network device may perform some or all of the steps in the above embodiments, and the steps or operations are merely examples, and the present application may also perform other operations or variations of various operations. Further, the various steps may be performed in a different order as presented in the above embodiments, and it is possible that not all of the operations in the above embodiments are performed.
  • FIG. 7 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 7 is based on the method embodiment shown in FIG. 5 or FIG. 6 , and further includes S 522.
  • the DU1 sends a timer suspension indication message to the UE.
  • the timer suspension indication information is used to instruct the UE to suspend its data transmission timer.
  • the data transmission timer may be a reordering timer of the RLC or the MAC, or may be a HARQ RTT timer.
  • the timer suspension indication information may further include a port number, configured to instruct the UE to listen to the port corresponding to the port number, and restart the timer after the port receives the data.
  • the execution sequence of S522 is performed after S502, and the application is not limited thereto.
  • the timer suspension indication information is sent to the UE through the DU1, so that the UE suspends its data transmission timer.
  • FIG. 8 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 8 is different from FIG. 5 to FIG. 7 in that, in any of the embodiments shown in FIG. 5 to FIG. 7, the data transmission state is sent to the CU through the DU1. Information, the CU then forwards the data transmission status information to the DU2, so that the DU2 obtains the data transmission status information.
  • the data transmission status information is directly transmitted to the DU2 through the DU1 so that the DU2 obtains the data transmission status information. That is, S504 and S506 in Figs. 5 to 7 are replaced by S504' in Fig. 7, and S504': DU1 transmits data transmission state information to DU2.
  • FIG. 9 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 9 is applied to the scenario shown in FIG. 2, and FIG. 9 is different from the embodiment shown in FIG. 5 to FIG. 8.
  • the CU is equivalent to the CU1 in FIG.
  • the communication between the CU and the DU2 is forwarded through the CU2.
  • the remaining steps are similar, as described in detail in FIG. 5 to FIG. 8 , and details are not described herein again.
  • FIG. 10 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 10 is applied to the embodiment shown in FIG. 3 or the scenario shown in FIG. 4, and the flow is as follows:
  • the first network device determines to switch from the first network device to the second network device according to the measurement report, or determines to migrate the bearer under the first network device to the second network device.
  • the bearer of the first network device is migrated to the second network device. It can be understood that part of the bearer under the first network device is migrated to the second network device.
  • the UE measures channel quality with the first network device and the second network device, and obtains a measurement report.
  • the measurement report is reported to the first network device.
  • the first network device determines, according to the measurement report, whether the UE switches from the first network device to the second network device, or determines to migrate the bearer under the first network device to the second network device. If yes, execute S1002.
  • the first network device and the second network device respectively measure channel quality with the UE, and obtain a measurement report.
  • the second network device will report the measurement report to the first network device.
  • the first network device determines, according to the measurement report, whether the UE switches from the first network device to the second network device, or determines to migrate the bearer under the first network device to the second network device. If it is determined to switch from the first network device to the second network device, or to determine to migrate the bearer under the first network device to the second network device, then perform S1002.
  • the first network device sends the foregoing data transmission status information to the second network device.
  • the second network device is caused to obtain data transmission status information between the first network device and the UE.
  • the data transmission status information may be used to indicate data transmission status information of the radio link control and/or the medium access control protocol stack in the first network device.
  • the data transmission status information includes, but is not limited to, at least one of the following: information that the first network device sends to the UE but does not receive the feedback information of the UE; the data unit that is not sent by the first network device to the UE information.
  • the data unit is a PDU or an SDU.
  • the information that the first network device does not send to the data unit of the UE includes, but is not limited to, sequence information of the untransmitted data unit.
  • the information of the data unit that the first network device sends to the UE but does not receive the feedback information of the UE includes, but is not limited to, at least one of the following: sequence information of the data unit that has not received the feedback information that has been sent, The data transmission timer, the time information of the HARQ process, the data unit transmission confirmation information of the HARQ process, the acknowledgement information of the data unit, the maximum transmission state variable, the maximum reception state variable, the transmission state variable, the reception state variable, and the transmission window.
  • the data transmission timer may be a reordering timer of the RLC or the MAC, or may be a HARQ RTT timer.
  • the first network device sends configuration information of the UE to the second network device.
  • the configuration information of the UE includes at least one of the following configuration parameters: a control plane configuration parameter and a user plane configuration parameter.
  • the control plane configuration parameter includes a configuration parameter of a function of the RRC protocol stack; the user control plane configuration parameter includes a configuration parameter of a function of the RRC protocol stack; and the user plane configuration parameter includes a protocol stack such as a PDCP, an RLC, and a MAC. At least one of the configuration parameters of the function.
  • the second network device establishes a control plane entity and/or a user plane entity of the UE according to the data transmission state information and/or the configuration information of the UE.
  • the first network device sends, to the second network device, a data unit that has not received the feedback information that has been sent by the first network device, and/or an untransmitted data unit.
  • the second network device performs data transmission with the UE.
  • the second network device sends, to the UE, the data unit that has not received the feedback information that has been sent by the first network device, and/or the untransmitted data unit.
  • the first network device sends the data transmission status information and/or the configuration information of the UE to the second network device, so that the second network device obtains the configuration information of the UE and the first network that are the same as the first network device.
  • the second network device performs data transmission with the UE according to the configuration information of the UE and/or the data transmission status information between the first network device and the UE.
  • the UE is switched from the first network device to the second network device, or the bearer of the UE under the first network device is migrated to the second network device, and in the process, the UE is not aware, and the continuity of data transmission is improved.
  • the network device may perform some or all of the steps in the above embodiments, and the steps or operations are merely examples, and the present application may also perform other operations or variations of various operations. Further, the various steps may be performed in a different order as presented in the above embodiments, and it is possible that not all of the operations in the above embodiments are performed.
  • FIG. 11 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 11 is based on the method embodiment shown in FIG. 10, and further includes:
  • S1012 The second network device sends the acknowledgement information to the first network device.
  • the confirmation message is used to indicate that the connection between the second network device and the UE is successfully established.
  • the first network device sends the transmission resource information and/or the status report indication information to the UE, where the transmission resource information includes the port number and/or the uplink transmission resource information, and is used to indicate that the UE sends the port corresponding to the port number and/or the uplink.
  • the resource information is transmitted with the second network device, where the status report indication information is used to instruct the UE to report the feedback information of the data unit sent by the first network device that has been received according to the transmission resource information.
  • the UE After receiving the transmission resource information, the UE sends the unsent feedback information of the data unit sent by the first network device that has been received or the feedback information sent to the first network device last time, and/or the data sent by the subsequent second network device.
  • the feedback information of the unit is sent to the second network device by using the port corresponding to the port number and/or the uplink sending resource information. After receiving the feedback information sent by the UE, the second network device determines that the connection between the second network device and the UE is successfully established.
  • the first network device sends, to the second network device, a data unit that does not receive the feedback information of the UE by the first network device and/or a data unit that is not sent by the first network device to the UE.
  • the second network device sends the foregoing data unit to the UE. After receiving the data unit, the UE sends feedback information to the second network device, and the second network device receives the feedback information sent by the UE, and determines that the second network device and the UE are successfully established. .
  • S1014 The second network device sends link release indication information to the first network device.
  • the link release indication information is used to instruct the first network device to delete configuration information and/or data transmission status information of the UE.
  • S1016 The first network device deletes configuration information and/or data transmission status information of the UE.
  • the second network device sends the acknowledgement information to the first network device to indicate that the second network device and the UE are successfully established, and the second network device sends the link release indication information to the first network device to indicate the first
  • the network device deletes configuration information and/or data transmission status information of the UE.
  • FIG. 12 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 12 is based on the method embodiment shown in FIG. 10 or FIG. 11 , and further includes S1018, which is illustrated by FIG. 10 .
  • the first network device sends a timer suspension indication message to the UE.
  • the timer suspension indication information is used to instruct the UE to suspend its data transmission timer.
  • the data transmission timer may be a reordering timer of the RLC or the MAC, or may be a HARQ RTT timer.
  • the timer suspension indication information may further include a port number, configured to instruct the UE to listen to the port corresponding to the port number, and restart the timer after the port receives the data.
  • the execution order of S1018 is performed after S1012, and the application does not limit this.
  • the timer suspension indication information is sent to the UE by the first network device, so that the UE suspends its data transmission timer.
  • FIG. 13 is a schematic flowchart of still another communication method provided by the present application.
  • FIG. 13 is applied to a scenario of multiple connections. The steps in this embodiment are as follows:
  • S1301 The CU acquires data transmission status information sent by the DU1.
  • the DU1 periodically feeds back the data transmission status information to the CU. Therefore, the CU can periodically acquire the data transmission status information of the DU1.
  • the CU performs a handover decision to determine to increase the data transmission between the DU2 and the UE, and then sends a data transmission status report indication indication to the DU1, and the CU receives the data transmission status information sent by the DU1.
  • the CU determines to increase the data transmission between the DU2 and the UE according to the measurement report, and sends a data transmission status report indication indication to the DU1, and the CU receives the data transmission status information sent by the DU1.
  • S1302 The CU configures configuration information of the UE for the DU2.
  • the CU can be configured to configure the configuration information of the UE by using the RRC message.
  • the UE configuration information configured by the CU in the DU2 may be the same as or different from the UE configuration information configured in the DU1.
  • the execution order of S1101 and S1102 is not limited.
  • S1303 The CU sends configuration information to the UE.
  • the CU may send configuration information of the UE by using an RRC message.
  • the configuration information may include transmission resource information configured to the UE.
  • the transmission resource information includes a port number, and is used to instruct the UE to receive data sent by the DU2 corresponding to the port number.
  • DU2 and DU1 can transmit different Channel State Information-Reference Signals (CSI-RS) or other port signals for the UE to distinguish data of different ports.
  • CSI-RS Channel State Information-Reference Signals
  • S1304 The UE establishes a layer 2 or layer 1 entity corresponding to the port number according to the configuration information, and performs data transmission on the port corresponding to the port number.
  • the timing between the TRPs is preferentially less than one CP. Therefore, after the UE receives the layer 2 or layer 1 parameters, the default UE and the TRP of the DU2 are The Time Advanced (TA) is 0 or the same as TA1 between the UE and the TPR of the DU1, and the acquisition process of the TA is not required.
  • TA Time Advanced
  • FIG. 14 is a schematic structural diagram of a network device provided by the present application.
  • the network device 1400 includes: a processor 1401, a memory 1402, and a communication port 1403.
  • the communication port may be a receiver or a transmitter.
  • the network device 1400 provides an air interface for the UE, and the network device 1400 can interact with other network devices.
  • the network device 1400 includes a processor 1401, a memory 1402, and a communication port 1403.
  • the processor 1401, the memory 1402, and the communication port 1403 all pass through the bus.
  • the storage 1402 stores the computer execution instructions; the processor 1403 executes the memory stored computer execution instructions, so that the network device performs data interaction with the other network devices and the UE through the communication port 1403 to perform any of the above-mentioned FIGS.
  • the communication method of the embodiment is described in accordance with the UE, and the network device 1400 can interact with other network devices.
  • the network device 1400 includes a processor 1401, a memory 1402, and a communication port 1403.
  • the processor 1401, the memory 1402, and the communication port 1403 all pass through the bus.
  • the storage 1402 stores the computer execution instructions; the processor 1403 executes the memory stored computer execution instructions, so that the network device performs data interaction with the other network devices
  • the network device 1500 includes: a processor 1501, a memory 1502, and a communication port 1503.
  • the communication port may be a receiver or a transmitter.
  • the network device 1500 provides an air interface for the UE, and the network device 1500 can interact with other network devices.
  • the network device 1500 includes a processor 1501, a memory 1502, and a communication port 1503.
  • the processor 1501, the memory 1502, and the communication port 1503 all pass through the bus. Connected; the memory 1502 stores computer execution instructions; the processor 1503 executes the memory stored computer execution instructions to cause the network device to perform data interaction with other network devices and the UE through the communication port 1503 to perform any of the above-described FIGS.
  • the communication method of the embodiment is described in the communication method of the embodiment.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

La présente invention concerne un procédé de communication, et un dispositif de réseau. Le procédé consiste à : envoyer des informations de commande de création de rapport d'état de transmission de données à une DU1, au moyen d'une CU, pour commander à la DU1 de rapporter des informations d'état de transmission de données entre la DU1 et un UE ; et envoyer, à une DU2, au moyen de la CU, des informations de configuration de l'UE, et des informations d'état de transmission de données entre la DU1 et l'UE rapportées par la DU1. L'invention implémente la commutation de l'UE, de la DU1 à la DU2, ou la migration d'une porteuse de l'UE, de la DU1 à la DU2, de façon transparente, améliorant ainsi la continuité de la transmission de données.
PCT/CN2017/120202 2017-01-06 2017-12-29 Procédé de communication, et dispositif à réseau WO2018127017A1 (fr)

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