WO2023221821A1 - Procédé et appareil de gestion de connexions de multiples unités cu, et dispositif associé - Google Patents

Procédé et appareil de gestion de connexions de multiples unités cu, et dispositif associé Download PDF

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Publication number
WO2023221821A1
WO2023221821A1 PCT/CN2023/092998 CN2023092998W WO2023221821A1 WO 2023221821 A1 WO2023221821 A1 WO 2023221821A1 CN 2023092998 W CN2023092998 W CN 2023092998W WO 2023221821 A1 WO2023221821 A1 WO 2023221821A1
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Prior art keywords
connection
terminal
message
established
side device
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PCT/CN2023/092998
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English (en)
Chinese (zh)
Inventor
佟舟
李娜
张慧敏
孙军帅
刘光毅
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2023221821A1 publication Critical patent/WO2023221821A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present disclosure relates to the field of communication technology, and in particular, to a multi-CU connection management method, device and related equipment.
  • a next generation base station may include a centralized unit (Centralized Unit, CU) and multiple distributed units.
  • Unit Distributed Unit, DU
  • the CU and DU are connected through the F1 interface
  • the terminal and the CU are connected through the DU.
  • a DU can only be connected to one CU; in future scenarios for vertical industries, a terminal may need to connect to multiple different CUs, which are located in different geographical locations and can provide different functions. Therefore, a new connection method is needed between CU and DU.
  • Embodiments of the present disclosure provide a multi-CU connection method, device and related equipment to meet the terminal's need to connect multiple different CUs.
  • embodiments of the present disclosure provide a multi-CU connection management method, which is applied to network-side devices, including:
  • the DU is connected to at least two CUs
  • the first CU is one of the at least two CUs
  • the first connection is a connection between the first CU and the DU.
  • the first parameter includes a first identifier and/or a second identifier
  • the first identifier is used to indicate the radio link control RLC channel that receives the first message
  • the second identifier is used to indicate the CU corresponding to the first message
  • embodiments of the present disclosure provide a multi-CU connection management method, which is applied to network-side devices, including:
  • a second connection is established between the DU and the second CU.
  • establishing a second connection between the DU and the second CU includes:
  • the terminal's business requirement information select the second CU from the CU information associated with the DU;
  • the method further includes:
  • the service requirement information of the terminal includes at least one of the following:
  • the terminal has latency requirements for services provided by the corresponding network of the CU.
  • the CU information associated with the DU includes at least one of the following:
  • the deployment location of the target CU is the deployment location of the target CU
  • the computing power of the target CU
  • the target CU is any CU among multiple CUs associated with the DU.
  • embodiments of the present disclosure also provide a multi-CU connection management method, which is applied to the network side equipment, including:
  • establishing a third connection between the second DU and the second CU includes:
  • multiple candidate DUs are obtained, wherein the reference signal received power RSRP of the cell corresponding to the candidate DU is greater than the first threshold, and the reference signal received quality RSRQ of the cell corresponding to the candidate DU is greater than the first threshold.
  • determining the second DU among the plurality of candidate DUs includes:
  • the target DU If the target DU satisfies the preset condition, determine the target DU as the second DU;
  • the target DU is any DU among the plurality of candidate DUs
  • the preset conditions include at least one of the following:
  • the slice ID supported by the target DU is the same as the slice ID supported by the first DU, and the RSRP value of the cell corresponding to the target DU is the maximum value among the multiple RSRP values of the cells respectively corresponding to the multiple candidate DUs;
  • the RSRQ of the cell corresponding to the target DU is greater than the RSRQ of the cell corresponding to the first DU;
  • the performance index of the target DU is greater than the third threshold corresponding to the performance index.
  • the method further includes:
  • deleting the fourth connection includes:
  • the second DU is determined as the third DU, wherein the reference signal received power RSRP of the cell corresponding to the third DU is less than the first threshold, and/or the third DU corresponds to the cell
  • the reference signal reception quality RSRQ is less than the second threshold
  • the method further includes:
  • embodiments of the present disclosure provide a multi-CU connection management method, applied to terminal devices, including:
  • the wireless link control RLC layer of the terminal establishes a connection with at least two PDCPs of the terminal, and the first PDCP layer is one of the at least two PDCPs of the terminal; the at least two PDCPs of the terminal are connected with the network-side device. At least two CUs correspond one to one.
  • the second parameter is used to indicate the RLC channel for receiving the second message.
  • embodiments of the present disclosure provide a multi-CU connection management method, applied to terminal devices, including:
  • the network side device When the first connection has been established between the distribution unit DU and the first concentration unit CU, and the network side device adds a second connection between the DU and the second CU, receive the radio resource control RRC sent by the network side device. A reconfiguration message is sent to the network side device and a reconfiguration completion message is fed back to the network side device.
  • embodiments of the present disclosure provide a multi-CU connection management method, applied to terminal devices, including:
  • a first connection has been established between the first distribution unit DU and the first centralized unit CU, a second connection has been established between the first DU and the second CU, and the network side device is added between the second DU and the second CU.
  • a first connection has been established between the first DU and the first CU
  • a second connection has been established between the first DU and the second CU
  • the network side device deletes the established connection between the second DU and the second CU.
  • the radio resource control RRC reconfiguration message sent by the network side device is received, and a reconfiguration completion message is fed back to the network side device.
  • embodiments of the present disclosure also provide a multi-CU connection management device, including:
  • the DU is connected to at least two CUs
  • the first CU is one of the at least two CUs
  • the first connection is a connection between the first CU and the DU.
  • embodiments of the present disclosure also provide a multi-CU connection management device, including:
  • a second connection is established between the DU and the second CU.
  • embodiments of the present disclosure also provide a multi-CU connection management device, including:
  • Second processor for:
  • an embodiment of the present disclosure also provides a multi-CU connection management device, including:
  • the wireless link control RLC layer of the terminal establishes a connection with at least two PDCPs of the terminal, and the first PDCP layer is one of the at least two PDCPs of the terminal; the at least two PDCPs of the terminal are connected with the network-side device. At least two CUs correspond one to one.
  • an embodiment of the present disclosure also provides a multi-CU connection management device, including:
  • the network side device When the first connection has been established between the distribution unit DU and the first concentration unit CU, and the network side device adds a second connection between the DU and the second CU, receive the radio resource control RRC sent by the network side device. A reconfiguration message is sent to the network side device and a reconfiguration completion message is fed back to the network side device.
  • an embodiment of the present disclosure also provides a multi-CU connection management device, including:
  • a first connection has been established between the first distribution unit DU and the first centralized unit CU, a second connection has been established between the first DU and the second CU, and the network side device is added between the second DU and the second CU.
  • the third connection receive the radio resource control RRC reconfiguration message sent by the network side device, and feed back the reconfiguration completion message to the network side device;
  • a first connection has been established between the first DU and the first CU
  • a second connection has been established between the first DU and the second CU
  • the network side device is deleted between the second DU and the second CU.
  • receive the radio resource control RRC reconfiguration message sent by the network side device and feed back a reconfiguration completion message to the network side device.
  • an embodiment of the present disclosure further provides a communication device, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor,
  • the program in the read memory implements the steps in the method described in the first aspect; or, the steps in the method described in the second aspect; or, the steps in the method described in the third aspect; Or, the steps in the method described in the fourth aspect; or, the steps in the method described in the fifth aspect; or, the steps in the method described in the sixth aspect.
  • embodiments of the present disclosure further provide a readable storage medium for storing a program that, when executed by a processor, implements the steps in the method described in the first aspect; or, as in the second aspect, The steps in the method described in the above aspect; or, the steps in the method described in the third aspect; or, the steps in the method described in the fourth aspect; or, the steps in the method described in the fifth aspect; Or, the steps in the method described in the sixth aspect.
  • one DU is configured to connect to multiple CUs to meet the terminal's need to connect to multiple different CUs in future scenarios for vertical industries and ensure the business continuity of the terminal.
  • Figure 1 is a block diagram of a wireless communication system to which embodiments of the present disclosure are applicable;
  • Figure 2 is one of the flow diagrams of a multi-CU connection management method applied to network-side devices provided by an embodiment of the present disclosure
  • Figure 3 is a second schematic flowchart of a multi-CU connection management method applied to network-side devices provided by an embodiment of the present disclosure
  • Figure 4 is a schematic structural diagram of a wireless bearer provided by an embodiment of the present disclosure.
  • Figure 5 is a schematic diagram of RRC message routing provided by an embodiment of the present disclosure.
  • Figure 6 is a schematic flowchart of another multi-CU connection management method applied to network-side devices provided by an embodiment of the present disclosure
  • Figure 7 is a schematic diagram of a CU adding process provided by an embodiment of the present disclosure.
  • Figure 8 is a schematic diagram of another CU adding process provided by an embodiment of the present disclosure.
  • Figure 9 is a schematic flowchart of yet another multi-CU connection management method applied to network-side devices provided by an embodiment of the present disclosure.
  • Figure 10 is a schematic diagram of a DU addition and deletion process provided by an embodiment of the present disclosure.
  • Figure 11 is a schematic diagram of another DU addition and deletion process provided by an embodiment of the present disclosure.
  • Figure 12 is one of the flow diagrams of a multi-CU connection management method applied to a terminal device provided by an embodiment of the present disclosure
  • Figure 13 is a second schematic flowchart of a multi-CU connection management method applied to a terminal device provided by an embodiment of the present disclosure
  • Figure 14 is a schematic flowchart of another multi-CU connection management method applied to terminal devices provided by an embodiment of the present disclosure
  • Figure 15 is a schematic flowchart of yet another multi-CU connection management method applied to a terminal device provided by an embodiment of the present disclosure
  • Figure 16 is a schematic structural diagram of a multi-CU connection management device provided by an embodiment of the present disclosure.
  • Figure 17 is a schematic structural diagram of another multi-CU connection management device provided by an embodiment of the present disclosure.
  • Figure 18 is a schematic structural diagram of another multi-CU connection management device provided by an embodiment of the present disclosure.
  • Figure 19 is a schematic structural diagram of yet another multi-CU connection management device provided by an embodiment of the present disclosure.
  • Figure 20 is a schematic structural diagram of yet another multi-CU connection management device provided by an embodiment of the present disclosure.
  • Figure 21 is a schematic structural diagram of another multi-CU connection management device provided by an embodiment of the present disclosure.
  • Figure 22 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure.
  • first, second, etc. in the description and claims of the present disclosure are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that embodiments of the present disclosure can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
  • the first object can be one or multiple.
  • “and/or" represents at least one of the connected objects, and the character “/" generally represents the preceding
  • the post-association object is an "OR" relationship.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency-Division Multiple Access
  • NR New Radio
  • FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present disclosure are applicable.
  • the wireless communication system includes a terminal 11 and a network side device 12.
  • the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE).
  • the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer or a personal digital computer.
  • PDA Personal Digital Assistant
  • handheld computer netbook, ultra-mobile personal computer (UMPC), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device (Vehicle User Equipment, VUE), Pedestrian User Equipment (PUE) and other terminal-side devices
  • UMPC Ultra-mobile personal computer
  • MID mobile Internet device
  • Wearable Device Wearable Device
  • VUE Vehicle-mounted device
  • PUE Pedestrian User Equipment
  • other terminal-side devices wearable devices include: smart watches, bracelets, headphones, glasses, etc. It should be noted that the embodiment of the present disclosure does not limit the specific type of terminal 11.
  • the network side device 12 may be a base station or a core network, where the base station may be called a Node B, an evolved Node B, an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, or a basic service Basic Service Set (BSS), Extended Service Set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, Wireless Local Area Network (WLAN) ) access point, wireless network communication technology (Wireless Fidelity, WiFi) node, transmitting receiving point (Transmitting Receiving Point, TRP) or in the field
  • BSS Basic Service Set
  • ESS Extended Service Set
  • B node evolved B node
  • eNB evolved B node
  • WLAN Wireless Local Area Network
  • WLAN Wireless Local Area Network
  • TRP Transmitting Receiving Point
  • FIG. 2 is the first schematic flowchart of the multi-CU connection management method provided by the embodiment of the present disclosure.
  • FIG. 3 is the second schematic flowchart of the multi-CU connection management method provided by the embodiment of the present disclosure.
  • the multi-CU connection management methods shown in Figures 2 and 3 are applied to network-side devices.
  • the multi-CU connection management method may include the following steps:
  • Step 201 Receive the first message sent by the PDCP layer of the first centralized unit CU from the first connection.
  • Step 202 After adding the first parameter to the first message, send the first message to the medium access control MAC layer of the distribution unit DU.
  • the multi-CU connection management method may also include the following steps:
  • Step 301 Receive the second message sent by the MAC layer from the first connection.
  • Step 302 Send the second message to the PDCP layer of the first CU.
  • the DU is connected to at least two CUs
  • the first CU is one of the at least two CUs
  • the first connection is a connection between the first CU and the DU.
  • connection between DU and at least two CUs can be understood as that at least two CUs establish connections with the terminal through DU.
  • connection between the first CU and DU can be understood as that the first CU establishes connections with the terminal through DU.
  • DU establishes a connection with the terminal.
  • At least any two of the two CUs are different (such as different functions, different processing capabilities, or different geographical locations, etc.).
  • at least one of the two CUs can be deployed at the edge to reduce terminal
  • at least the other of the two CUs can be a CU deployed in the cloud to reduce deployment costs.
  • At least two Packet Data Convergence Protocol (PDCP) entities are associated with one Radio Link Control (RLC) bearer to realize the connection between one DU and at least two CUs.
  • RLC Radio Link Control
  • at least two PDCP entities correspond to at least two CUs one-to-one
  • the RLC bearer should be understood as the RLC and Medium Access Control (Medium Access Control, MAC) logical channel configuration on a radio bearer in a cell group.
  • one DU is configured to connect to multiple CUs to meet the terminal's need to connect to multiple different CUs in future scenarios for vertical industries and ensure the business continuity of the terminal.
  • the first parameter includes a first identifier and/or a second identifier
  • the first identifier is used to indicate the radio link control RLC channel to receive the first message
  • the second identifier is used to indicate the CU corresponding to the first message
  • At least two PDCP entities when performing downlink transmission (corresponding to the first message), at least two PDCP entities can be distinguished by marking the RLC channel used to transmit the first message, so as to indirectly complete the Distinguish between at least two CUs that establish a connection with the DU at the terminal; when performing uplink transmission (corresponding to the second message), the second message can be directly transmitted to the corresponding PDCP entity according to the message routing related to the second message.
  • the network side device can also directly distinguish at least two CUs that establish connections with the DU at the terminal by marking the CU corresponding to the first message, where it is understandable that the first message corresponds to the CU Therefore, the CU is the message sending source of the first message.
  • the PDCP entity corresponding to the first CU and the PDCP entity corresponding to the second CU are associated with the RLC bearer corresponding to the DU.
  • the RLC bearer includes two parts: the RLC layer and the MAC layer.
  • the RLC layer communicates with the PDCP through the RLC channel (Channel). layer communicates.
  • Different PDCP entities transmit RLC Service Data Unit (SDU) to the RLC layer through different RLC channels.
  • SDU RLC Service Data Unit
  • the RLC layer can Identify upper layer (can be understood as PDCP layer) information from different RLC channels.
  • the message transmitted by the RLC layer to the lower layer is the RLC Protocol Data Unit (PDU).
  • the RLC PDU includes the RLC header (header) and the RLC SDU.
  • the RLC header can include the aforementioned first parameter. .
  • the RLC layer can determine the RLC channel according to the first parameter in the RLC header corresponding to the second message. , and directly transmit the second message to the corresponding PDCP layer through the RLC channel.
  • the first identifier included in the set first parameter is represented by a reserved field "R" (Reserved (R) field) in the RLC header.
  • R Reserved
  • the first identifier included in the first parameter can also be set through the reserved field "R" (Reserved (R) field) in the RLC header and the used field in the RLC header (the used field can be one, or Comprehensive representation of two or more), set the value of the "R” field to 0 or 1, and the value of the used field to 0 or 1 to respectively correspond to the channel IDs of different RLC channels.
  • R Reserved
  • the first identifier included in the first parameter is also possible to set the first identifier included in the first parameter to be represented by at least one field that has been used in the RLC header.
  • the setting method of the second identifier can be referred to the setting method of the first identifier in the above example. To avoid repetition, the details will not be described again.
  • Figure 6 is a schematic flowchart of a multi-CU connection management method provided by an embodiment of the present disclosure.
  • the multi-CU connection management method shown in Figure 6 is applied to network-side devices.
  • the multi-CU connection management method may include the following steps:
  • Step 601 When the first connection has been established between the distribution unit DU and the first centralized unit CU, establish a second connection between the DU and the second CU.
  • connection between one DU and multiple CUs is realized to meet the needs of terminals to connect to multiple different CUs in future scenarios for vertical industries. Ensure terminal business continuity.
  • the second CU should be understood as a CU that is different from the first CU (such as different functions, different processing capabilities, or different geographical locations, etc.).
  • the first CU may be deployed at the edge to reduce terminal access.
  • the second CU can be deployed in the cloud to reduce deployment costs.
  • the number of the second CU may be one, or two or more. In the case where the number of second CUs is two or more, the two or more second CUs are different (for example, at least one of the information such as function, processing capability, or geographical location exists) different).
  • establishing a second connection between the DU and the second CU includes:
  • the terminal's business requirement information select the second CU from the CU information associated with the DU;
  • the selection operation of the second CU may be performed by the DU, that is, the DU receives the service requirement information of the terminal sent by the first CU, and selects the second CU information from the CU information associated with the DU according to the service requirement information of the terminal. 2CU.
  • the DU can trigger the addition operation of the second connection (that is, the DU initiates a service establishment request to the second CU so that the second CU reserves relevant service resources for the terminal), and will add the situation and The relevant information of the second CU is also fed back to the first CU.
  • the DU may send relevant information about the selected second CU. Send it to the first CU, so that the adding operation of the second connection is triggered according to the first CU (that is, the first CU initiates a service establishment request to the second CU, so that the second CU reserves relevant service resources for the terminal).
  • the selection operation of the second CU can also be performed by the first CU, that is, the first CU sends a CU information request message to the DU (used to request the CU list associated with the DU and the support of each CU in the CU list. service information), after the DU responds to the CU information request message, the first CU receives the CU information fed back by the DU, and selects the second CU from the received CU information according to the terminal's business requirement information.
  • the first CU may feed back the selected second CU to the DU, so that the DU triggers the adding operation of the second connection.
  • the first CU can also directly trigger the adding operation of the second connection.
  • the service requirement information of the terminal includes at least one of the following:
  • the terminal’ s computing capability requirements for the CU (CU Capability Request), such as the terminal’s requirements for the data processing rate of the CU, etc.;
  • the terminal has a latency requirement (Maximum Latency) for the services provided by the corresponding network of the CU.
  • the business requirement information of the terminal may be obtained by the first CU from the terminal, or may be obtained by the first CU from other network nodes.
  • the other network nodes may be application functions (Application Function, AF), Application Server (Application Server, AF), or Policy Control Function (PCF), etc.
  • the CU information associated with the DU includes at least one of the following:
  • the deployment location (CU Location) of the target CU such as the location of the computer room of the target CU and/or the distance between the target CU and the DU, etc.;
  • the computing capability of the target CU (CU capability);
  • the target CU is any CU among multiple CUs associated with the DU.
  • the method further includes:
  • RRC Radio Resource Control
  • the first CU receives the service establishment response of the second CU corresponding to the second connection, and sends the updated configuration information to the terminal through the RRC reconfiguration message, and the terminal receives the RRC reconfiguration. After the message is sent, a reconfiguration completion message is fed back to the first CU.
  • DU receives the CU selection configuration (i.e., the terminal's business requirement information) sent by the first CU, and completes the CU selection response (i.e., selects the second CU in the CU information associated with the DU) based on the CU selection configuration. Subsequently, the CU adding request and response are completed through DU or the first CU (that is, the adding operation of the second connection is triggered); after the second connection is added, the first CU receives the second CU (that is, other CUs in Figure 7) corresponding to the above The second connection responds to the service establishment and sends the updated configuration information to the terminal through an RRC reconfiguration message. After receiving the RRC reconfiguration message, the terminal feeds back a reconfiguration completion message to the first CU.
  • the CU selection configuration i.e., the terminal's business requirement information
  • the CU selection response i.e., selects the second CU in the CU information associated with the DU
  • the first CU sends a CU information request message to the DU (used to request the CU list associated with the DU and the service information supported by each CU in the CU list).
  • the first CU receives the CU information fed back by the DU, and selects the second CU from the received CU information based on the terminal's business requirement information, and subsequently completes the CU addition request through the DU or the first CU; after the second connection is added, the first CU
  • the CU receives the service establishment response of the second CU (that is, other CUs in Figure 8) corresponding to the second connection, and sends the updated configuration information to the terminal through an RRC reconfiguration message.
  • the terminal After receiving the RRC reconfiguration message, the terminal sends The first CU feeds back a reconfiguration completion message.
  • Figure 9 is a schematic flowchart of a multi-CU connection management method provided by an embodiment of the present disclosure.
  • the multi-CU connection management method shown in Figure 9 is applied to network-side devices.
  • the multi-CU connection management method may include the following steps:
  • Step 901 When the first connection has been established between the first distribution unit DU and the first centralized unit CU, and the second connection has been established between the first DU and the second CU, when the second DU and the second CU Establish a third connection between them;
  • the first connection has been established between the first DU and the first CU, and the first connection has been established between the first DU and the second CU.
  • the fourth connection is deleted.
  • the second CU should be understood as a CU that is different from the first CU (such as different functions, different processing capabilities, or different geographical locations, etc.).
  • the first CU may be deployed at the edge to reduce terminal access.
  • the second CU can be deployed in the cloud to reduce deployment costs.
  • the number of the second CU may be one, or two or more. In the case where the number of second CUs is two or more, the two or more second CUs are different (for example, at least one of the information such as function, processing capability, or geographical location exists) different).
  • the second DU should be understood as a DU that is different from the first DU.
  • the number of the second DU may be one, or two or more, and this is not limited in this embodiment of the present disclosure.
  • establishing a third connection between the second DU and the second CU includes:
  • multiple candidate DUs are obtained, wherein the reference signal received power (RSRP) of the cell corresponding to the candidate DU is greater than the first threshold, and the reference signal received power (RSRP) of the cell corresponding to the candidate DU is Reference Signal Received Quality (RSRQ) is greater than the second threshold;
  • RSRP reference signal received power
  • RSS Reference Signal Received Quality
  • the determination of the second DU may be performed by the first CU, that is, the first CU obtains multiple candidate DUs based on the measurement results reported by the terminal; the first CU determines the second DU among the multiple candidate CUs. , and sends the relevant information of the second DU to the second CU, so that the second CU initiates a connection request to the second DU.
  • the determination of the second DU can also be performed by the second CU, that is, the second CU obtains multiple candidate DUs based on the measurement results reported by the terminal; the second CU determines the second DU among the multiple candidate CUs. DU and initiates a connection request to the second DU.
  • the measurement results reported by the terminal include:
  • PCI physical cell identifier
  • the first CU or the second CU When determining the second DU among multiple candidate DUs, the first CU or the second CU will exchange information with the multiple candidate DUs respectively, and determine the second DU based on the exchanged information and the service requirements of the terminal; wherein , the interaction information between the first CU or the second CU and multiple candidate DUs includes: the slice list supported by the candidate DU (DU support S-NSSAIs), the channel quality of the cell where the candidate DU is located, and the calculation of the candidate DU capabilities, location information of candidate DU, etc.
  • the slice list supported by the candidate DU DU support S-NSSAIs
  • the channel quality of the cell where the candidate DU is located the calculation of the candidate DU capabilities, location information of candidate DU, etc.
  • determining the second DU among the plurality of candidate DUs includes:
  • the target DU If the target DU satisfies the preset condition, determine the target DU as the second DU;
  • the target DU is any DU among the plurality of candidate DUs
  • the preset conditions include at least one of the following:
  • the slice ID supported by the target DU is the same as the slice ID supported by the first DU, and the RSRP value of the cell corresponding to the target DU is the maximum value among the multiple RSRP values of the cells respectively corresponding to the multiple candidate DUs;
  • the RSRQ of the cell corresponding to the target DU is greater than the RSRQ of the cell corresponding to the first DU;
  • the performance index of the target DU is greater than the third threshold corresponding to the performance index.
  • the alternative DU supporting the same slice ID (referring to the slice ID supported by the alternative DU and the slice ID supported by the first DU (the same), determine the candidate DU with the largest RSRP value of the relevant cell as the second DU;
  • a candidate DU with a channel quality better than that of the first DU-related cell among the plurality of candidate DUs is determined as the second DU (the determined The number of second DU is at least one);
  • the candidate DU that meets the specific requirements is determined as the second DU (the number of determined second DUs is at least one).
  • the method further includes:
  • the first CU when the determination of the second DU is performed by the first CU, after the third connection is established, the first CU will receive the service establishment response of the second CU corresponding to the third connection, and will update the The configuration information is sent to the terminal through an RRC reconfiguration message. After receiving the RRC reconfiguration message, the terminal feeds back a reconfiguration completion message to the first CU.
  • the second CU when the determination of the second DU is performed by the second CU, after the third connection is established, the second CU sends the updated configuration information to the terminal through an RRC reconfiguration message, and the terminal receives the RRC reconfiguration. After receiving the message, the second CU feeds back the reconfiguration completion message to the second CU, and the second CU feeds back the reconfiguration completion message to the first CU.
  • deleting the fourth connection includes:
  • the second DU is determined as the third DU, wherein the reference signal received power RSRP of the cell corresponding to the third DU is less than the first threshold, and/or the reference signal received power RSRP of the cell corresponding to the third DU
  • the signal reception quality RSRQ is less than the second threshold
  • the determination of the third DU may be performed by the first CU or the second CU, that is, the first CU receives the measurement results reported by the terminal, and determines the second DU as the third DU based on the measurement results; or, the second CU receives The measurement result reported by the terminal is determined as the third DU based on the measurement result.
  • the first CU sends the relevant information of the third DU to the second CU, so that the second CU initiates a deletion request to the third DU; if the third DU is determined by the second CU, then The second CU directly initiates a deletion request to the third DU.
  • the method further includes:
  • the first CU will receive the service deletion response corresponding to the third connection from the second CU, and pass the updated configuration information through The RRC reconfiguration message is sent to the terminal. After receiving the RRC reconfiguration message, the terminal feeds back a reconfiguration completion message to the first CU.
  • the second CU sends the updated configuration information to the terminal through an RRC reconfiguration message (corresponding to the deletion of the third connection), and the terminal After receiving the RRC reconfiguration message, the second CU feeds back the reconfiguration complete message to the second CU, and the second CU feeds back the reconfiguration complete message to the first CU.
  • the adding process of the second DU may be:
  • the terminal reports the measurement results to the first CU.
  • the first CU determines the second DU based on the service requirements of the terminal, it sends the relevant information of the second DU to the second CU, so that the second CU initiates an addition request to the second DU; in the After the establishment of the three connections is completed, the second CU sends a service establishment response corresponding to the third connection (i.e., the second DU addition response in Figure 10) to the first CU, and the first CU generates an RRC reconfiguration based on the service establishment response. information, and sends the RRC reconfiguration information to the terminal (after the reconfiguration is completed, the terminal will feed back the reconfiguration completion message to the first CU).
  • the first connection has been established between the first DU and the first CU, and the first connection has been established between the first DU and the second CU.
  • the deletion process of the fourth connection can be:
  • the terminal reports the measurement results to the first CU.
  • the first CU determines the second DU as the third DU based on the preset conditions, it sends relevant information of the second DU (that is, the determined third DU) to the second CU. So that the second CU initiates a deletion request to the second DU; after the fourth connection is deleted, the second CU sends a service deletion response corresponding to the fourth connection (i.e., the second DU deletion response in Figure 10) to the third DU.
  • the first CU generates RRC reconfiguration information based on the service deletion response, and sends the RRC reconfiguration information to the terminal (after the reconfiguration is completed, the terminal will feedback the reconfiguration to the first CU completion message).
  • the adding process of the second DU may be:
  • the terminal reports the measurement results to the second CU.
  • the second CU determines the second DU based on the terminal's service requirements, it initiates an add request to the second DU; after the third connection is established, based on the newly established third connection, the second CU Send RRC reconfiguration information to the terminal, and receive a reconfiguration completion message fed back by the terminal, and then the second CU forwards the reconfiguration completion message to the first CU.
  • the first connection has been established between the first DU and the first CU, and the first connection has been established between the first DU and the second CU.
  • the deletion process of the fourth connection can be:
  • the terminal reports the measurement results to the second CU.
  • the second CU determines the second DU as the third DU based on the preset conditions, it initiates a deletion request to the second DU (that is, the determined third DU); in the fourth connection
  • the second CU sends RRC reconfiguration information to the terminal and receives a reconfiguration complete message fed back by the terminal. Then the second CU forwards the reconfiguration complete message to the first CU.
  • FIG. 12 is the first schematic flowchart of the multi-CU connection management method provided by the embodiment of the present disclosure
  • FIG. 13 is the second schematic flowchart of the multi-CU connection management method provided by the embodiment of the present disclosure.
  • the multi-CU connection management method shown in Figures 12 and 13 is applied to terminal equipment.
  • the multi-CU connection management method may include the following steps:
  • Step 1201 Receive the first message from the media access control MAC layer of the terminal.
  • Step 1202 Send the first message to the first Packet Data Convergence Protocol PDCP layer of the terminal.
  • the multi-CU connection management method may also include the following steps:
  • Step 1301 Receive the second message from the first PDCP layer of the terminal.
  • Step 1302 After adding a second parameter to the second message, send the second message to the MAC layer of the terminal.
  • the wireless link control RLC layer of the terminal establishes a connection with at least two PDCPs of the terminal, and the first PDCP layer is one PDCP of the at least two PDCPs of the terminal; at least two PDCPs of the terminal Each PDCP has a one-to-one correspondence with at least two CUs of the network side device.
  • the second parameter is used to indicate the RLC channel for receiving the second message.
  • this embodiment is an implementation of a terminal device corresponding to the method embodiments described in Figures 2 and 3. Therefore, the relevant descriptions in the above method embodiments can be referred to, and the same beneficial effects can be achieved. In order to avoid repeated explanation, they will not be described again here.
  • Figure 14 is a schematic flowchart of a multi-CU connection management method provided by an embodiment of the present disclosure.
  • the multi-CU connection management method shown in Figure 14 is applied to terminal equipment.
  • the multi-CU connection management method may include the following steps:
  • Step 1401 When the first connection has been established between the distribution unit DU and the first centralized unit CU, and the network side device adds a second connection between the DU and the second CU, receive the wireless link sent by the network side device. Resource control RRC reconfiguration message, and feed back a reconfiguration completion message to the network side device.
  • one DU is configured to connect to multiple CUs to meet the terminal's need to connect to multiple different CUs in future scenarios for vertical industries and ensure the business continuity of the terminal.
  • Figure 15 is a schematic flowchart of a multi-CU connection management method provided by an embodiment of the present disclosure.
  • the multi-CU connection management method shown in Figure 15 is applied to terminal equipment.
  • the multi-CU connection management method may include the following steps:
  • Step 1501 The first connection has been established between the first distribution unit DU and the first centralized unit CU, the second connection has been established between the first DU and the second CU, and the network side device is connected between the second DU and the second CU.
  • a third connection receives the radio resource control RRC reconfiguration message sent by the network side device, and feed back the reconfiguration completion message to the network side device;
  • a first connection has been established between the first DU and the first CU
  • a second connection has been established between the first DU and the second CU
  • the network side device deletes the established connection between the second DU and the second CU.
  • the radio resource control RRC reconfiguration message sent by the network side device is received, and a reconfiguration completion message is fed back to the network side device.
  • connection between one DU and multiple CUs is configured to meet the terminal's need to connect to multiple different CUs in future scenarios for vertical industries and ensure the business continuity of the terminal.
  • Figure 16 is a schematic structural diagram of a multi-CU connection management device 1600 provided by an embodiment of the present disclosure. As shown in Figure 16, the multi-CU connection management device 1600 includes:
  • First transceiver 1601 for:
  • the DU is connected to at least two CUs
  • the first CU is one of the at least two CUs
  • the first connection is a connection between the first CU and the DU.
  • the first parameter includes a first identifier and/or a second identifier
  • the first identifier is used to indicate the radio link control RLC channel that receives the first message
  • the second identifier is used to indicate the CU corresponding to the first message
  • the multi-CU connection management device 1600 can implement each process of the method embodiments in FIG. 2 and FIG. 3 in the embodiment of the present disclosure, and achieve the same beneficial effects. To avoid duplication, details will not be described here.
  • Figure 17 is a schematic structural diagram of a multi-CU connection management device 1700 provided by an embodiment of the present disclosure. As shown in Figure 17, the multi-CU connection management device 1700 includes:
  • the first processor 1701 is used for:
  • a second connection is established between the DU and the second CU.
  • the first processor 1701 is specifically used to:
  • the multi-CU connection management device also includes:
  • Second transceiver for:
  • the service requirement information of the terminal includes at least one of the following:
  • the terminal has latency requirements for services provided by the corresponding network of the CU.
  • the CU information associated with the DU includes at least one of the following:
  • the deployment location of the target CU is the deployment location of the target CU
  • the computing power of the target CU
  • the target CU is any CU among multiple CUs associated with the DU.
  • the second transceiver is also used for:
  • the multi-CU connection management device 1700 can implement each process of the method embodiment in Figure 6 in the embodiment of the present disclosure, and achieve the same beneficial effects. To avoid duplication, details will not be described here.
  • Figure 18 is a schematic structural diagram of a multi-CU connection management device 1800 provided by an embodiment of the present disclosure. As shown in Figure 18, the multi-CU connection management device 1800 includes:
  • the second processor 1801 is used for:
  • the multi-CU connection management device 1800 also includes:
  • the second processor 1801 is specifically used to:
  • multiple candidate DUs are obtained, wherein the reference signal received power RSRP of the cell corresponding to the candidate DU is greater than the first threshold, and the reference signal received quality RSRQ of the cell corresponding to the candidate DU is greater than the second threshold;
  • the third transceiver is also used for:
  • the second processor 1801 is specifically used to:
  • the target DU If the target DU satisfies the preset condition, determine the target DU as the second DU;
  • the target DU is any DU among the plurality of candidate DUs
  • the preset conditions include at least one of the following:
  • the slice ID supported by the target DU is the same as the slice ID supported by the first DU, and the RSRP value of the cell corresponding to the target DU is the maximum value among the multiple RSRP values of the cells respectively corresponding to the multiple candidate DUs;
  • the RSRQ of the cell corresponding to the target DU is greater than the RSRQ of the cell corresponding to the first DU;
  • the performance index of the target DU is greater than the third threshold corresponding to the performance index.
  • the third transceiver is also used for:
  • the third transceiver is also used for:
  • the second processor 1801 is specifically used to:
  • the second DU is determined as the third DU, wherein the reference signal received power RSRP of the cell corresponding to the third DU is less than the first threshold, and/or the third DU is The reference signal reception quality RSRQ of the cell corresponding to the three DUs is less than the second threshold;
  • the third transceiver is also used for:
  • the third transceiver is also used for:
  • the multi-CU connection management device 1800 can implement each process of the method embodiment in Figure 9 in the embodiment of the present disclosure, and achieve the same beneficial effects. To avoid duplication, details will not be described here.
  • FIG 19 is a schematic structural diagram of a multi-CU connection management device 1900 provided by an embodiment of the present disclosure. As shown in Figure 19, the multi-CU connection management device 1900 includes:
  • the fourth transceiver 1901 is used for:
  • the wireless link control RLC layer of the terminal establishes a connection with at least two PDCPs of the terminal, and the first PDCP layer is one of the at least two PDCPs of the terminal; the at least two PDCPs of the terminal are connected with the network-side device. At least two CUs correspond one to one.
  • the first parameter is used to indicate the RLC channel for receiving the second message.
  • the multi-CU connection management device 1900 can implement each process of the method embodiments in FIG. 12 and FIG. 13 in the embodiment of the present disclosure, and achieve the same beneficial effects. To avoid duplication, they will not be described again here.
  • FIG 20 is a schematic structural diagram of a multi-CU connection management device 2000 provided by an embodiment of the present disclosure. As shown in Figure 20, the multi-CU connection management device 2000 includes:
  • the network side device When the first connection has been established between the distribution unit DU and the first concentration unit CU, and the network side device adds a second connection between the DU and the second CU, receive the radio resource control RRC sent by the network side device. A reconfiguration message is sent to the network side device and a reconfiguration completion message is fed back to the network side device.
  • the multi-CU connection management device 2000 can implement each process of the method embodiment in Figure 14 in the embodiment of the present disclosure, and achieve the same beneficial effects. To avoid duplication, details will not be described here.
  • Figure 21 is a schematic structural diagram of a multi-CU connection management device 2100 provided by an embodiment of the present disclosure. As shown in Figure 21, the multi-CU connection management device 2100 includes:
  • the sixth transceiver 2101 is used for:
  • a first connection has been established between the first distribution unit DU and the first centralized unit CU, a second connection has been established between the first DU and the second CU, and the network side device is added between the second DU and the second CU.
  • the third connection receive the radio resource control RRC reconfiguration message sent by the network side device, and feed back the reconfiguration completion message to the network side device;
  • a first connection has been established between the first DU and the first CU
  • a second connection has been established between the first DU and the second CU
  • the network side device deletes the established connection between the second DU and the second CU.
  • the radio resource control RRC reconfiguration message sent by the network side device is received, and a reconfiguration completion message is fed back to the network side device.
  • the multi-CU connection management device 2100 can implement each process of the method embodiment in Figure 15 in the embodiment of the present disclosure, and achieve the same beneficial effects. To avoid duplication, details will not be described here.
  • the communication device may include a processor 2201, a memory 2202, and a program 22021 stored on the memory 2202 and executable on the processor 2201.
  • any steps in the method embodiment corresponding to Figure 12, Figure 13, Figure 14 or Figure 15 can be implemented and the same beneficial effects can be achieved, which will not be repeated here. Repeat.
  • any steps in the method embodiments corresponding to Figure 2, Figure 3, Figure 6 or Figure 9 can be implemented and the same beneficial effects can be achieved, here No longer.
  • the storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

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

Abstract

La présente divulgation, qui relève du domaine technique des communications, concerne un procédé et un appareil de gestion de connexions de multiples unités CU, et un dispositif associé. Le procédé de gestion de connexions de multiples unités CU comprend : la réception, en provenance d'une première connexion, d'un premier message envoyé par une couche PDCP d'une première unité CU, et après l'ajout d'un premier paramètre dans le premier message, l'envoi du premier message à une couche MAC d'une unité DU ; ou la réception, en provenance de la première connexion, d'un second message envoyé par la couche MAC, et l'envoi du second message à la couche PDCP de la première unité CU, l'unité DU étant connectée à au moins deux unités CU, la première unité CU étant une des deux unités CU ou plus, et la première connexion étant une connexion entre la première unité CU et l'unité DU.
PCT/CN2023/092998 2022-05-16 2023-05-09 Procédé et appareil de gestion de connexions de multiples unités cu, et dispositif associé WO2023221821A1 (fr)

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CN109391963A (zh) * 2017-08-11 2019-02-26 华为技术有限公司 一种传输方法和网络设备
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CN113747521A (zh) * 2020-05-29 2021-12-03 维沃移动通信有限公司 网络切换方法、装置、通信设备及系统
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