CN111988831A - Information transmission method and device, CU and DU - Google Patents

Information transmission method and device, CU and DU Download PDF

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Publication number
CN111988831A
CN111988831A CN201910424019.1A CN201910424019A CN111988831A CN 111988831 A CN111988831 A CN 111988831A CN 201910424019 A CN201910424019 A CN 201910424019A CN 111988831 A CN111988831 A CN 111988831A
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cell
message
network mode
nsa
identifier
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CN201910424019.1A
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CN111988831B (en
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何金招
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ZTE Corp
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ZTE Corp
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Priority to CN201910424019.1A priority Critical patent/CN111988831B/en
Priority to PCT/CN2020/079795 priority patent/WO2020233209A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A method, apparatus, CU, DU, and computer-readable storage medium for information transfer, wherein the method comprises: the DU sends a first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service; the DU receives a second message sent by the CU, wherein the second message carries information of a network mode of a cell, and the network mode comprises at least one of NSA and SA; and the DU informs the information of the network mode of the cell to a terminal corresponding to the cell. Through the embodiment of the invention, the DU can acquire the network mode information of the cell and further inform the terminal, so that the condition that the terminal supporting the SA initiates the connection establishment request to be rejected by a base station or a core network under the NSA and SA cell coexistence networking to cause call failure can be effectively avoided, the call completing rate is improved, and the user experience effect is improved.

Description

Information transmission method and device, CU and DU
Technical Field
This document relates to, but is not limited to, a method, apparatus, CU (Central Unit), DU (Distributed Unit), and computer-readable storage medium for information transfer.
Background
With the continuous maturity of the SA (stand-alone networking) industry chain, in order to meet the requirements of an initial NSA (Non-stand-alone networking) and an evolved SA end user, a network configuration scheme with coexistence of the NSA and the SA can be used to realize smooth evolution from the NSA network to the SA network.
In a mixed networking scene of SA and NSA, SA and NSA cells are successfully established, a terminal supporting NSA can be accessed to an eNB (evolved Node B, evolved base station), and the eNB and a gNB (5G base station) communicate through an X2 interface to establish the NSA cells in a double-connection access NR (New Radio, New air interface) network to experience 5G services; the terminal supporting the SA can access the SA cell of the gNB network to experience 5G service.
However, since the mechanism of the current NSA and SA cell coexistence networking is still imperfect, a terminal supporting the SA may access to a base station cell which cannot provide the SA service, resulting in a call failure.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides an information transmission method and device, a CU, a DU and a computer readable storage medium.
The embodiment of the invention provides an information transmission method, which comprises the following steps:
A CU receives a first message sent by a DU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
the CU determining a network mode of the cell; wherein the network mode comprises at least one of NSA and SA;
and the CU sends a second message to the DU, wherein the second message carries the information of the network mode of the cell.
The embodiment of the invention also provides an information transmission method, which comprises the following steps:
the DU sends a first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
the DU receives a second message sent by the CU, wherein the second message carries information of a network mode of a cell, and the network mode comprises at least one of NSA and SA;
and the DU informs the information of the network mode of the cell to a terminal corresponding to the cell.
An embodiment of the present invention further provides an information transmission apparatus, including:
the first receiving module is used for receiving a first message sent by the DU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
A determining module for determining a network mode of the cell; wherein the network mode comprises at least one of NSA and SA;
a first sending module, configured to send a second message to the DU, where the second message carries information of the network mode of the cell.
An embodiment of the present invention further provides an information transmission apparatus, including:
a second sending module, configured to send the first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
a second receiving module, configured to receive a second message sent by the CU, where the second message carries information of a network mode of a cell, and the network mode includes at least one of NSA and SA;
and the informing module is used for informing the terminal corresponding to the cell of the information of the network mode of the cell.
An embodiment of the present invention further provides a CU, including: memory, processor and computer program stored on the memory and executable on the processor, which when executing the program implements the method of information transfer.
An embodiment of the present invention further provides a DU, including: memory, processor and computer program stored on the memory and executable on the processor, which when executing the program implements the method of information transfer.
The embodiment of the invention also provides a computer-readable storage medium, which stores computer-executable instructions, wherein the computer-executable instructions are used for executing the information transmission method.
The embodiment of the invention comprises the following steps: the DU sends a first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service; the DU receives a second message sent by the CU, wherein the second message carries information of a network mode of a cell, and the network mode comprises at least one of NSA and SA; and the DU informs the information of the network mode of the cell to a terminal corresponding to the cell. Through the embodiment of the invention, the DU can acquire the network mode information of the cell and further inform the terminal, so that the condition that the terminal supporting the SA initiates the connection establishment request to be rejected by a base station or a core network under the NSA and SA cell coexistence networking to cause call failure can be effectively avoided, the call completing rate is improved, and the user experience effect is improved.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram of a hybrid SA and NSA networking scenario;
FIG. 2 is a flow chart of a method of information transfer of an embodiment of the present invention;
FIG. 3 is a flow chart of a method of information transmission (applied to a CU) in accordance with an embodiment of the present invention;
FIG. 4 is a flow chart of a method of information transmission (applied to DUs) according to an embodiment of the present invention;
FIG. 5 is a flow chart of a first embodiment of the present invention;
FIG. 6 is a flowchart of a second embodiment of the present invention;
FIG. 7 is a flowchart of a third embodiment of the present invention;
FIG. 8 is a schematic diagram of the components of an apparatus for information transmission (applied to a CU) according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the components of an apparatus for information transmission (applied to DU) according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of the composition of a CU in accordance with an embodiment of the present invention;
fig. 11 is a schematic diagram of the composition of a DU according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Referring to fig. 1, in the current NR-side cell establishment procedure, a DU initiates a cell establishment REQUEST (F1SETUP REQUEST) message (cell supports SA and NSA) to a CU through an F1 interface, the CU receives the cell establishment REQUEST, the CU initiates an NG SETUP REQUEST (NG SETUP REQUEST) message to a 5GC (5G Core Network ), the 5GC responds to the NG SETUP RESPONSE message, and the CU determines whether the cell can provide an SA service according to a RESPONSE message result; the CU interacts with an eNB X2 interface, and according to an interaction result, the CU judges whether the cell can provide NSA service or not; the CU finishes the judgment of NSA & & SA, the CU informs a DU cell GNB-CU CONFIGURATION UPDATE (GNB-CU CONFIGURATION UPDATE) message to activate the cell, and since the DU cannot sense whether the cell can provide the SA service or not, the air interface broadcast of the DU cell carries the support of SA & & NSA, the terminal (namely UE and user equipment) supporting the SA is finally caused to initiate a connection establishment request to be rejected by a core network which cannot provide the SA service, and the experience of a terminal user is influenced.
As shown in fig. 2, the method for information transmission according to the embodiment of the present invention is performed at the NR side of the 5G base station, and includes:
in step 101, the DU sends a first message to the CU.
The first message is for requesting at least one of cell establishment, cell parameter update, and cell out-of-service.
When the first message is used for requesting cell establishment, the first message comprises an F1 establishment request; the first message is used for requesting cell parameter update, and the first message comprises a DU configuration update message; the first message is used for requesting the cell to exit the service, and the first message comprises a DU configuration update message.
Step 102, the CU determines the network mode of the cell.
Wherein the network mode includes at least one of NSA and SA.
In an embodiment, when the first message is used to request cell establishment or cell parameter update, the step 102 includes:
and the CU respectively carries out NSA cell judgment and SA cell judgment to determine the network mode of the cell.
And the CU and the eNB carry out communication negotiation, NSA cell judgment is carried out according to the response of the eNB, and whether the cell supports NSA or not is determined.
The CU performs communication negotiation with an AMF (Access and Mobility Management Function), performs SA cell decision according to a response of the AMF, and determines whether the cell supports SA.
In an embodiment, when the first message is used to request the cell to exit from the service, the step 102 includes:
the CU determines a network mode of the cell according to the first message.
Wherein the first message carries a network mode of the cell.
Step 103, the CU sends a second message to the DU, where the second message carries information of the network mode of the cell.
When the first message is used for requesting cell establishment, the second message comprises an F1 establishment request response;
when the first message is used for requesting cell parameter update, the second message comprises a DU configuration update response;
the first message is used for requesting the cell to exit from the service, and the second message comprises at least one of a CU configuration update message and a cell deactivation message.
In this case, the CU typically sends the CU configuration update message first, and then sends the deactivate cell message.
In an embodiment, when the first message is used to request cell establishment or cell parameter update, the information of the network mode of the cell includes a network mode identifier supported by the cell, and the second message carries an NCGI and a supported network mode identifier of the cell, where the network mode identifier includes at least one of an NSA identifier and an SA identifier.
In an embodiment, the first message is used to request a Cell to exit a service, the second message is used to indicate a Cell blocking, the information of the network mode of the Cell includes a to-be-blocked network mode Identifier, the second message carries an NCGI (Cell Global Identifier) and a to-be-blocked network mode Identifier of the Cell, and the to-be-blocked network mode Identifier includes at least one of an NSA Identifier and an SA Identifier.
In an embodiment, the first message is used to request a cell to exit from a service, the second message is used to indicate cell deactivation, the network mode information of the cell includes a deactivated network mode identifier, the second message carries an NCGI and a deactivated network mode identifier of the cell, and the deactivated network mode identifier includes at least one of an NSA identifier and an SA identifier.
And 104, the DU informs the terminal corresponding to the cell of the information of the network mode of the cell.
In an embodiment, the DU informs a terminal corresponding to the cell of the network mode information of the cell by at least one of the following manners:
broadcasting, closing cell signals and preassigning with the terminal.
The broadcast mode may be an air interface broadcast mode.
In an embodiment, the information about the network mode of the cell includes a network mode identifier supported by the cell, and when the first message is used to request cell establishment or cell parameter update, the step 104 includes:
when the cell supports the SA, the DU sends a broadcast message carrying an SA support identifier;
when the cell supports NSA, the DU sends broadcast message carrying NSA identification or does not send broadcast message;
when the cell supports both NSA and SA, the DU sends a broadcast message carrying the NSA-supporting identifier and the AS-supporting identifier;
and when the cell does not support NSA and SA, the DU closes the cell signal.
When the cell supports NSA, the DU does not send broadcast messages, that is, the DU is a pre-agreed mode with the terminal, that is, if the cell does not indicate SA support, only NSA is supported by default.
In an embodiment, when the first message is used to request the cell to exit from the service and the second message is used to indicate the cell blocking, the step 104 includes:
when the network mode to be blocked of the cell is SA, the DU sends a broadcast message carrying an SA cell access prohibition indication;
When the network mode to be blocked of the cell is NSA, the DU sends a broadcast message carrying NSA cell access prohibition indication;
and when the network mode to be blocked of the cell is NSA and SA, the DU sends a broadcast message carrying the NSA cell and SA cell access prohibition indication.
In an embodiment, when the first message is used to request the cell to exit from the service, and the second message is used to indicate cell deactivation, the step 104 includes:
the network mode of the cell is SA, and when the second message indicates that the SA network mode is deactivated, the DU closes the cell signal;
the network mode of the cell is NSA, and the DU closes the cell signal when the second message indicates that the NSA network mode is deactivated;
the network mode of the cell is NSA and SA, and the DU closes the cell signal when the second message indicates that the NSA network mode and the SA network mode are deactivated;
the network mode of the cell is NSA and SA, and when the second message indicates that the NSA network mode is deactivated, the DU sends a broadcast message carrying the NSA network mode unavailable;
the network mode of the cell is NSA and SA, and when the second message indicates that the SA network mode is deactivated, the DU sends a broadcast message carrying the unavailable SA network mode.
Through the embodiment of the invention, the DU can acquire the network mode information of the cell and further inform the terminal, so that the condition that the terminal supporting the SA initiates the connection establishment request to be rejected by a base station or a core network under the NSA and SA cell coexistence networking to cause call failure can be effectively avoided, the call completing rate is improved, and the user experience effect is improved.
The following describes CU and DU, respectively.
As shown in fig. 3, the method for transmitting information according to the embodiment of the present invention, applied to a CU, includes:
in step 201, the CU receives a first message sent by the DU.
The first message is for requesting at least one of cell establishment, cell parameter update, and cell out-of-service.
When the first message is used for requesting cell establishment, the first message comprises an F1 establishment request; the first message is used for requesting cell parameter update, and the first message comprises a DU configuration update message; the first message is used for requesting the cell to exit the service, and the first message comprises a DU configuration update message.
Step 202, the CU determines the network mode of the cell.
Wherein the network mode includes at least one of NSA and SA.
In an embodiment, when the first message is used to request cell establishment or cell parameter update, the step 202 includes:
And the CU respectively carries out NSA cell judgment and SA cell judgment to determine the network mode of the cell.
In an embodiment, the CU performs communication negotiation with the eNB, performs NSA cell decision according to a response of the eNB, and determines whether the cell supports NSA.
The CU and the eNB can carry out communication negotiation through an X2 interface, and NSA cell decision is carried out according to the 4G response.
In an embodiment, the CU negotiates communication with the AMF, makes an SA cell decision according to a response of the AMF, and determines whether the cell supports SA.
And the CU and the AMF carry out interactive negotiation, and SA cell judgment is carried out according to AMF response.
In an embodiment, when the first message is used to request the cell to exit from the service, the step 202 includes:
the CU determines a network mode of the cell according to the first message.
Wherein the first message carries a network mode of the cell.
Step 203, the CU sends a second message to the DU, where the second message carries information of the network mode of the cell.
When the first message is used for requesting cell establishment, the second message comprises an F1 establishment request response;
when the first message is used for requesting cell parameter update, the second message comprises a DU configuration update response;
The first message is used for requesting the cell to exit from the service, and the second message comprises at least one of a CU configuration update message and a cell deactivation message.
In this case, the CU typically sends the CU configuration update message first, and then sends the deactivate cell message.
In an embodiment, when the first message is used to request cell establishment or cell parameter update, the information of the network mode of the cell includes a network mode identifier supported by the cell, and the second message carries an NCGI and a supported network mode identifier of the cell, where the network mode identifier includes at least one of an NSA identifier and an SA identifier.
In an embodiment, the first message is used to request a cell to exit a service, the second message is used to indicate cell blocking, the information of the network mode of the cell includes a to-be-blocked network mode identifier, the second message carries an NCGI and a to-be-blocked network mode identifier of the cell, and the to-be-blocked network mode identifier includes at least one of an NSA identifier and an SA identifier.
In an embodiment, the first message is used to request a cell to exit from a service, the second message is used to indicate cell deactivation, the network mode information of the cell includes a deactivated network mode identifier, the second message carries an NCGI and a deactivated network mode identifier of the cell, and the deactivated network mode identifier includes at least one of an NSA identifier and an SA identifier.
As shown in fig. 4, the method for information transmission provided in the embodiment of the present invention is applied to a DU, and includes:
in step 301, the DU sends a first message to the CU.
The first message is for requesting at least one of cell establishment, cell parameter update, and cell out-of-service.
When the first message is used for requesting cell establishment, the first message comprises an F1 establishment request; the first message is used for requesting cell parameter update, and the first message comprises a DU configuration update message; the first message is used for requesting the cell to exit the service, and the first message comprises a DU configuration update message.
Step 302, the DU receives a second message sent by the CU, where the second message carries information of a network mode of a cell.
Wherein the network mode includes at least one of NSA and SA.
When the first message is used for requesting cell establishment, the second message comprises an F1 establishment request response;
when the first message is used for requesting cell parameter update, the second message comprises a DU configuration update response;
the first message is used for requesting the cell to exit from the service, and the second message comprises at least one of a CU configuration update message and a cell deactivation message.
In an embodiment, when the first message is used to request cell establishment or cell parameter update, the information of the network mode of the cell includes a network mode identifier supported by the cell, and the second message carries an NCGI and a supported network mode identifier of the cell, where the network mode identifier includes at least one of an NSA identifier and an SA identifier.
In an embodiment, the first message is used to request a cell to exit a service, the second message is used to indicate cell blocking, the information of the network mode of the cell includes a to-be-blocked network mode identifier, the second message carries an NCGI and a to-be-blocked network mode identifier of the cell, and the to-be-blocked network mode identifier includes at least one of an NSA identifier and an SA identifier.
In an embodiment, the first message is used to request a cell to exit from a service, the second message is used to indicate cell deactivation, the network mode information of the cell includes a deactivated network mode identifier, the second message carries an NCGI and a deactivated network mode identifier of the cell, and the deactivated network mode identifier includes at least one of an NSA identifier and an SA identifier.
Step 303, the DU informs the terminal corresponding to the cell of the information of the network mode of the cell.
In an embodiment, the DU informs a terminal corresponding to the cell of the network mode information of the cell by at least one of the following manners:
broadcasting, closing cell signals and preassigning with the terminal.
In an embodiment, the information about the network mode of the cell includes a network mode identifier supported by the cell, and when the first message is used to request cell establishment or cell parameter update, step 303 includes:
when the cell supports the SA, the DU sends a broadcast message carrying an SA support identifier;
when the cell supports NSA, the DU sends broadcast message carrying NSA identification or does not send broadcast message;
when the cell supports both NSA and SA, the DU sends a broadcast message carrying the NSA-supporting identifier and the AS-supporting identifier;
and when the cell does not support NSA and SA, the DU closes the cell signal.
When the cell supports NSA, the DU does not send broadcast messages, that is, the DU is a pre-agreed mode with the terminal, that is, if the cell does not indicate SA support, only NSA is supported by default.
In an embodiment, when the first message is used to request a cell to exit from a service, and the second message is used to indicate a cell block, the step 303 includes:
When the network mode to be blocked of the cell is SA, the DU sends a broadcast message carrying an SA cell access prohibition indication;
when the network mode to be blocked of the cell is NSA, the DU sends a broadcast message carrying NSA cell access prohibition indication;
and when the network mode to be blocked of the cell is NSA and SA, the DU sends a broadcast message carrying the NSA cell and SA cell access prohibition indication.
In an embodiment, when the first message is used to request a cell to exit from a service, and the second message is used to indicate cell deactivation, step 303 includes:
the network mode of the cell is SA, and when the second message indicates that the SA network mode is deactivated, the DU closes the cell signal;
the network mode of the cell is NSA, and the DU closes the cell signal when the second message indicates that the NSA network mode is deactivated;
the network mode of the cell is NSA and SA, and the DU closes the cell signal when the second message indicates that the NSA network mode and the SA network mode are deactivated;
the network mode of the cell is NSA and SA, and when the second message indicates that the NSA network mode is deactivated, the DU sends a broadcast message carrying the NSA network mode unavailable;
The network mode of the cell is NSA and SA, and when the second message indicates that the SA network mode is deactivated, the DU sends a broadcast message carrying the unavailable SA network mode.
Through the embodiment of the invention, the DU can acquire the network mode information of the cell and further inform the terminal, so that the condition that the terminal supporting the SA initiates the connection establishment request to be rejected by a base station or a core network under the NSA and SA cell coexistence networking to cause call failure can be effectively avoided, the call completing rate is improved, and the user experience effect is improved.
The following is a description by way of some application examples.
Application example 1
As shown in fig. 5, the first message is used to request cell establishment for illustration.
In step 401, the DU sends F1 setup request message to the CU requesting cell setup.
The cells on the DU and CU can support NSA, SA, and NSA and SA 3 network modes.
When the cell is newly created, the DU sends F1 setup request to the CU.
F1 establishes a request carrying NCGI cell id and supported NSA, or SA networking id information, a supported PLMN (Public Land Mobile Network) list, a supported Network slice list, etc.
The DU and CU may interact with F1 setup request signaling flow through F1 interface.
The F1setup request includes: f1SETUP REQUEST (F1 SETUP REQUEST).
In step 402, the CU sends an endec X2setup request to the eNB.
The CU and eNB may interact with the cell establishment procedure through the X2 interface.
And when the F1 establishment request carries NSA supported by each cell, the CU sends an ENDC X2 establishment request to the eNB.
The endec X2 establishes a request to carry a list of supported PLMNs for each logical cell.
The endec X2setup request signaling includes: endec X2SETUP REQUEST message.
In step 403, the eNB sends an endec X2setup response to the CU.
The eNB establishing the request response signaling in response to the endec X2 includes: ENDC X2SETUP RESPONSE, EN-DC X2SETUP FAILURE messages.
In step 404, the CU decides whether the cell supports NSA.
When the eNB responds to the EN-DC X2SETUP FAILUR message, the NSA establishment failure of the cell does not support NSA.
When the eNB responds to the endec X2SETUP RESPONSE message, the cell NSA establishes normal support NSA.
When the eNB has no X2 interface with the CU, the cell does not support NSA.
In step 405, the CU sends an NG setup request to the AMF.
And when the cell establishment request message carries the SA supported by each cell, the CU sends an NG establishment request message to the AMF.
The NG setup request message includes: NG SETUP REQUEST message.
In step 406, the AMF sends an NG setup request response to the CU.
NG setup request signaling includes: NG SETUP RESPONSE, NG SETUP FAILURE messages.
In step 407, the CU decides whether the cell supports SA.
When AMF responds to NG SETUP RESPONSE, the cell supports the PLMN list and the network slice list and the AMF supports the PLMN list and the network slice list to have intersection, otherwise the cell does not support the SA.
When AMF responds to NG SETUP FAILURE, the cell does not support SA.
When CU and AMF NG fail, the cell does not support SA.
In step 408, the CU sends a cell setup request response to the DU.
When the CU judges that the cell supports NSA and SA, the activated NCGI is carried in the cell establishment request response message and the NSA and SA identification are simultaneously supported.
When the CU judges that the cell supports NSA, the activated NCGI and the NSA simultaneously supported identification are carried in the cell establishment request response message.
And when the CU judges that the cell supports the SA, carrying the activated NCGI and the simultaneous support SA identifier in the cell establishment request response message.
The CU response DU setup request response signaling includes: f1SETUP RESPONSE message.
In step 409, the DU cell broadcasts notification NSA and/or SA information.
When the CU notifies that the DU cell supports the SA, the DU cell broadcasts an SIB1(System Information Block 1) message to notify the terminal of carrying the supported SA identifier.
When the CU notifies the DU cell that NSA is supported, the SIB1 message of the DU cell broadcast informs the terminal that NSA is supported, and the SIB1 may not be sent.
When the CU informs the DU cell that both NSA and SA are supported, the DU cell broadcasts SIB1 message to inform the terminal that the NSA and SA are supported.
And when the CU informs that the DU cell does not support NSA and SA, the cell signal is closed.
Application example two
As shown in fig. 6, the first message is used to request cell parameter update.
In step 501, the DU sends a DU configuration update message to the CU to request cell parameter update.
The cells on the DU and CU can support NSA, SA, and NSA and SA 3 network modes.
And when a cell is newly built or cell parameters are updated, the DU sends a DU configuration update message to the CU.
The DU configuration update message carries the NCGI cell id and the supported NSA, or SA networking id information, the supported PLMN list, the supported network slice list, and the like.
And the DU and the CU can perform DU configuration update signaling flow interaction through an F1 interface.
The DU configuration update signaling includes: GNB-DU CONFIGURATION UPDATE (DU CONFIGURATION UPDATE).
In step 502, the CU sends an endec X2 update request to the eNB.
The CU and eNB may interact with the update signaling flow through the X2 interface.
And when the DU configuration update message carries NSA supported by each cell, the CU sends an ENDC X2 update request to the eNB.
The ENDC X2 update request carries the list of each cell supported PLMNs.
The endec X2 update request signaling includes: an EN-DC CONFIGURATION UPDATE message.
In step 503, the eNB sends an endec X2 update response to the CU.
The eNB response to the endx 2 update request response signaling includes: EN-DC CONFIGURATION UPDATE ACK, EN-DC CONFIGURATION UPDATE FAILURE message.
In step 504, the CU decides whether the cell supports NSA.
When the eNB responds to the EN-DC CONFIGURATION UPDATE FAILURE message, the NSA of the cell fails to UPDATE and does not support NSA.
And when the eNB responds to the EN-DC CONFIGURATION UPDATE ACK message, the NSA of the cell UPDATEs the normally supported NSA.
When the eNB has no X2 interface with the CU, the cell does not support NSA.
In step 505, the CU sends an NG update request to the AMF.
And when the update request message carries the SA supported by each cell, the CU sends the update request message to the AMF.
The update request message includes: RAN CONFIGURATION UPDATE message.
At step 506, the AMF sends an update request response to the CU.
The update request signaling includes: RAN CONFIGURATION UPDATE ACK message.
In step 507, the CU decides whether the cell supports SA.
When the AMF responds to RAN CONFIGURATION UPDATE ACK, the cell support PLMN list and the network slice list have intersection with the AMF support PLMN list and the network slice list, and the cell supports SA, otherwise, the cell does not support SA.
When CU and AMF NG fail, the cell does not support SA.
In step 508, the CU sends a cell update request response to the DU.
When the CU judges that the cell supports NSA and SA, the activated NCGI is carried in the cell updating request response message and the NSA and SA identification are simultaneously supported.
When the CU judges that the cell supports NSA, the activated NCGI and the NSA simultaneously supported identification are carried in the cell updating request response message.
And when the CU judges that the cell supports the SA, carrying the activated NCGI and the simultaneous support SA identifier in a cell updating request response message.
The CU response DU update request response signaling includes: GNB-CU CONFIGURATION UPDATE message.
In step 509, the DU cell broadcasts notification NSA and/or SA information.
When the CU notifies the DU cell that the SA is supported, the DU cell broadcasts an SIB1 message to notify the terminal that the SA identification is supported.
When the CU notifies the DU cell that NSA is supported, the SIB1 message of the DU cell broadcast informs the terminal that NSA is supported, and the SIB1 may not be sent.
When the CU informs the DU cell that both NSA and SA are supported, the DU cell broadcasts SIB1 message to inform the terminal that the NSA and SA are supported.
And when the CU informs that the DU cell does not support NSA and SA, the cell signal is closed.
Application example three
As shown in fig. 7, the first message is used to request the cell to quit service (or quit service for short).
Step 601, when the DU executes the cell out-of-service operation, the DU sends a DU configuration update message to the CU to indicate the cell out-of-service.
The DU sends DU configuration update message to CU to carry cell resignation, which may be NSA cell resignation, SA cell resignation, or NSA and SA cell resignation.
And the DU sends a DU configuration updating message to the CU, wherein the DU configuration updating message carries the NCGI identification and the NSA and SA identification of the quit service cell.
The sending, by the DU, the DU configuration update signaling to the CU includes: GNB-DU CONFIGURATION UPDATE message.
In step 602, the CU sends a CU configuration update message to the DU indicating cell blocking.
The indicated cell block may be an NSA cell, an SA cell, or a cell of both NSA and SA.
The CU sends a CU configuration update message to the DU, wherein the NCGI identification and the NSA and SA identification of the cell are carried in the CU configuration update message.
Sending, by the CU, the CU configuration update signaling to the DU includes: GNB-CU CONFIGURATION UPDATE.
Step 603, the DU cell broadcasts and notifies the terminal blocking information, indicating that the terminal is prohibited from accessing.
When the CU notifies the DU of the SA cell blocking, the DU broadcasts the SA cell indication to forbid the new terminal from accessing.
When the CU informs the DU of blocking the NSA cell, the DU broadcasts the NSA cell indication to forbid the new terminal from accessing.
When the CU informs the DU of blocking NSA and SA cells, the DU broadcasts SA and NSA cell instructions to forbid the new terminal from accessing.
In step 604, the DU sends a CU configuration update confirm message to the CU.
Sending, by the DU, a CU configuration update confirmation message to the CU includes: GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE message.
And step 605, the CU quits the service of the cell migration online terminal.
And for the SA cell out of service, migrating the online terminal through the switching/redirecting/releasing terminal.
And for the NSA cell quit, releasing and migrating the online terminal through the Pscell change/SN change/SN.
For SA and NSA cell quit, migrating the on-line SA terminal by switching/redirecting/releasing the terminal; and releasing and migrating the online NSA terminal through the Pscell change/SN change/SN.
In step 606, the CU sends a cell deactivation notification message to the DU.
The CU sending the cell deactivation notification flow signaling to the DU includes: GNB-CU CONFIGURATION UPDATE, GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE messages.
The deactivated cell signaling carries the NCGI identity and the NSA and SA identities of the cell.
In step 607, the DU notifies the terminal.
The cell is in an SA network mode, and for SA cell deactivation, cell radio frequency signals are turned off.
The cell is in an NSA network mode, and for the deactivation of the NSA cell, the radio frequency signal of the cell is closed.
The cells are in SA and NSA network modes, and for SA cell deactivation, the terminal is informed in a broadcast mode and the SA network mode of the cell is indicated to be unavailable.
The cells are in SA and NSA network mode, and for NSA cell deactivation, the terminal is broadcasted to indicate that the cell NSA network mode is not available.
In this example, the message that is broadcast to notify the terminal includes a SIB1 message.
As can be seen from the above application example, in the flows of NR side cell establishment/update/fallback, the CU determines the support situations of SA and NSA, the CU notifies the SA & & NSA information supported by the DU cell, the DU cell broadcasts the SA & & NSA information to the terminal, when the SA terminal initiates a voice call, the terminal selects to access to the base station cell supporting SA according to the SA & & NSA information carried in the broadcast, thereby avoiding the call failure caused by the terminal accessing to the base station cell which cannot provide the SA service, improving the call completing rate, and improving the user experience effect.
As shown in fig. 8, an embodiment of the present invention further provides an apparatus for information transmission, which is applied to a CU, and includes:
a first receiving module 701, configured to receive a first message sent by a DU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
a determining module 702 configured to determine a network mode of the cell; wherein the network mode comprises at least one of NSA and SA;
a first sending module 703 is configured to send a second message to the DU, where the second message carries information of the network mode of the cell.
As shown in fig. 9, an apparatus for information transmission according to an embodiment of the present invention is applied to a DU, and includes:
a second sending module 801, configured to send a first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
a second receiving module 802, configured to receive a second message sent by the CU, where the second message carries information of a network mode of a cell, and the network mode includes at least one of NSA and SA;
a notification module 803, configured to notify the terminal corresponding to the cell of the information of the network mode of the cell.
As shown in fig. 10, an embodiment of the present invention further provides a CU, including: a memory 901, a processor 902 and a computer program 903 stored on the memory 901 and executable on the processor 902, the processor 902 implementing the method of information transmission when executing the program.
As shown in fig. 11, an embodiment of the present invention further provides a DU, including: a memory 1001, a processor 1002 and a computer program 1003 stored on the memory 1001 and executable on the processor 1002, the processor 1002 implementing the method of information transfer when executing the program.
The embodiment of the invention also provides a computer-readable storage medium, which stores computer-executable instructions, wherein the computer-executable instructions are used for executing the information transmission method.
In this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

Claims (19)

1. A method of information transmission, comprising:
a central unit CU receives a first message sent by a distributed unit DU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
the CU determining a network mode of the cell; wherein the network mode comprises at least one of a non-independent networking, NSA, and an independent networking, SA;
and the CU sends a second message to the DU, wherein the second message carries the information of the network mode of the cell.
2. The method of claim 1, wherein the CU determines a network mode of a cell when the first message is used to request cell setup or cell parameter update, comprising:
and the CU respectively carries out NSA cell judgment and SA cell judgment to determine the network mode of the cell.
3. The method of claim 2, wherein the CU makes NSA cell decision and SA cell decision, respectively, and determining the network mode of the cell comprises:
the CU and an evolution type base station eNB carry out communication negotiation, NSA cell judgment is carried out according to the response of the eNB, and whether the cell supports NSA or not is determined;
and the CU performs communication negotiation with an access and mobility management function (AMF), and performs SA cell judgment according to the response of the AMF to determine whether the cell supports SA or not.
4. The method of claim 2 or 3,
the information of the network mode of the cell includes a network mode identifier supported by the cell, the second message carries a global cell identity, NCGI, and a supported network mode identifier of the cell, and the network mode identifier includes at least one of an NSA identifier and an SA identifier.
5. The method of claim 1, wherein the first message is for requesting the cell to exit service, and wherein the CU determines a network mode of the cell, comprising:
the CU determines a network mode of the cell according to the first message.
6. The method of claim 5,
the second message is used for indicating cell blocking, the information of the network mode of the cell includes a network mode identifier to be blocked, the second message carries the NCGI and the network mode identifier to be blocked of the cell, and the network mode identifier to be blocked includes at least one of an NSA identifier and an SA identifier.
7. The method of claim 5,
the second message is used for indicating cell deactivation, the network mode information of the cell includes a deactivated network mode identifier, the second message carries the NCGI and the deactivated network mode identifier of the cell, and the deactivated network mode identifier includes at least one of an NSA identifier and an SA identifier.
8. The method of claim 1,
when the first message is used for requesting cell establishment, the first message comprises an F1 establishment request, and the second message comprises an F1 establishment request response;
when the first message is used for requesting cell parameter update, the first message comprises a DU configuration update message, and the second message comprises a DU configuration update response;
the first message is used for requesting the cell to exit the service, the first message comprises a DU configuration update message, and the second message comprises at least one of a CU configuration update message and a cell deactivation message.
9. A method of information transmission, comprising:
the DU sends a first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
the DU receives a second message sent by the CU, wherein the second message carries information of a network mode of a cell, and the network mode comprises at least one of NSA and SA;
and the DU informs the information of the network mode of the cell to a terminal corresponding to the cell.
10. The method of claim 9, wherein the DU informs the terminal corresponding to the cell of the network mode information of the cell by at least one of:
Broadcasting, closing cell signals and preassigning with the terminal.
11. The method as claimed in claim 9 or 10, wherein the information of the network mode of the cell includes a network mode identifier supported by the cell, and the first message is used to inform the terminal corresponding to the cell of the information of the network mode of the cell by the DU when cell establishment or cell parameter update is requested, including:
when the cell supports the SA, the DU sends a broadcast message carrying an SA support identifier;
when the cell supports NSA, the DU sends broadcast message carrying NSA identification or does not send broadcast message;
when the cell supports both NSA and SA, the DU sends a broadcast message carrying the NSA-supporting identifier and the AS-supporting identifier;
and when the cell does not support NSA and SA, the DU closes the cell signal.
12. The method as claimed in claim 9 or 10, wherein the first message is used to request a cell to exit from service, and the second message is used to indicate that when a cell is blocked, the DU informs a terminal corresponding to the cell of information about a network mode of the cell, including:
when the network mode to be blocked of the cell is SA, the DU sends a broadcast message carrying an SA cell access prohibition indication;
When the network mode to be blocked of the cell is NSA, the DU sends a broadcast message carrying NSA cell access prohibition indication;
and when the network mode to be blocked of the cell is NSA and SA, the DU sends a broadcast message carrying the NSA cell and SA cell access prohibition indication.
13. The method as claimed in claim 9 or 10, wherein the first message is used to request a cell to exit from service, and the second message is used to indicate that when a cell is deactivated, the DU informs a terminal corresponding to the cell of information about a network mode of the cell, including:
the network mode of the cell is SA, and when the second message indicates that the SA network mode is deactivated, the DU closes the cell signal;
the network mode of the cell is NSA, and the DU closes the cell signal when the second message indicates that the NSA network mode is deactivated;
the network mode of the cell is NSA and SA, and the DU closes the cell signal when the second message indicates that the NSA network mode and the SA network mode are deactivated;
the network mode of the cell is NSA and SA, and when the second message indicates that the NSA network mode is deactivated, the DU sends a broadcast message carrying the NSA network mode unavailable;
The network mode of the cell is NSA and SA, and when the second message indicates that the SA network mode is deactivated, the DU sends a broadcast message carrying the unavailable SA network mode.
14. The method of claim 9,
when the first message is used for requesting cell establishment, the first message comprises an F1 establishment request, and the second message comprises an F1 establishment request response;
when the first message is used for requesting cell parameter update, the first message comprises a DU configuration update message, and the second message comprises a DU configuration update response;
the first message is used for requesting the cell to exit the service, the first message comprises a DU configuration update message, and the second message comprises at least one of a CU configuration update message and a cell deactivation message.
15. An apparatus for information transmission, comprising:
the first receiving module is used for receiving a first message sent by the DU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
a determining module for determining a network mode of the cell; wherein the network mode comprises at least one of NSA and SA;
a first sending module, configured to send a second message to the DU, where the second message carries information of the network mode of the cell.
16. An apparatus for information transmission, comprising:
a second sending module, configured to send the first message to the CU; the first message is used for requesting at least one of cell establishment, cell parameter update and cell exit service;
a second receiving module, configured to receive a second message sent by the CU, where the second message carries information of a network mode of a cell, and the network mode includes at least one of NSA and SA;
and the informing module is used for informing the terminal corresponding to the cell of the information of the network mode of the cell.
17. A CU, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of information transmission according to any of claims 1 to 8 when executing the program.
18. A DU, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of information transmission according to any of claims 9 to 14 when executing the program.
19. A computer-readable storage medium storing computer-executable instructions for performing the method of information transmission of any one of claims 1-14.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112654056A (en) * 2020-12-07 2021-04-13 京信通信***（中国）有限公司 Method, distribution unit, concentration unit and medium for shared cell management
WO2022237658A1 (en) * 2021-05-11 2022-11-17 中兴通讯股份有限公司 Network connection exception processing method, electronic device, and storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108632923A (en) * 2017-03-24 2018-10-09 ***通信有限公司研究院 Idle state mutual operation method, device, terminal and network side equipment
CN108668381A (en) * 2017-09-23 2018-10-16 华为技术有限公司 Communication means and device
CN109600837A (en) * 2017-09-30 2019-04-09 中兴通讯股份有限公司 The generation method and device of system information
US20190141546A1 (en) * 2017-11-09 2019-05-09 Comcast Cable Communications, Llc Csi transmission with multiple bandwidth parts

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108632880B (en) * 2017-03-16 2021-11-02 ***通信有限公司研究院 Networking working mode selection method, device and terminal
CN108696881B (en) * 2017-03-16 2021-06-29 ***通信有限公司研究院 Connection management method, first network equipment, terminal equipment and system
US10880798B2 (en) * 2017-08-28 2020-12-29 Qualcomm Incorporated Techniques for mode selection and cell selection/reselection
CN109219157B (en) * 2018-10-30 2020-12-08 中国联合网络通信集团有限公司 Network mode configuration method and device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108632923A (en) * 2017-03-24 2018-10-09 ***通信有限公司研究院 Idle state mutual operation method, device, terminal and network side equipment
CN108668381A (en) * 2017-09-23 2018-10-16 华为技术有限公司 Communication means and device
CN109600837A (en) * 2017-09-30 2019-04-09 中兴通讯股份有限公司 The generation method and device of system information
US20190141546A1 (en) * 2017-11-09 2019-05-09 Comcast Cable Communications, Llc Csi transmission with multiple bandwidth parts

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "R2-1809682 "NSA/SA NR cell indication in NR CGI reporting"", 《3GPP TSG_RAN\WG2_RL2》 *
ERICSSON: "R3-190781 "Regarding support of UE Trace Activation/Deactivation"", 《3GPP TSG_RAN\WG3_IU》 *
HUAWEI: "R3-182116 "(TP for NR BL CR for TS 38.473): on Cell Barred Info exchange over F1 interface"", 《3GPP TSG_RAN\WG3_IU》 *
NTT DOCOMO等: "R3-171833 "F1 interface: Work Plan on F1"", 《3GPP TSG_RAN\WG3_IU》 *
ZTE CORPORATION: "R3-184661 "Discussion on PLMN and TAC transmission over F1"", 《3GPP TSG_RAN\WG3_IU》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112654056A (en) * 2020-12-07 2021-04-13 京信通信***（中国）有限公司 Method, distribution unit, concentration unit and medium for shared cell management
CN112654056B (en) * 2020-12-07 2024-01-23 京信网络***股份有限公司 Method, distribution unit, concentration unit and medium for managing shared cell
WO2022237658A1 (en) * 2021-05-11 2022-11-17 中兴通讯股份有限公司 Network connection exception processing method, electronic device, and storage medium

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