CN110913456B - Core network type indication method and communication device - Google Patents

Abstract

The embodiment of the invention provides a method and a communication device for indicating a core network type.

Description

A core network type indication method and communication device

technical field

The present invention relates to the field of communications, and in particular, to a core network type indication method and a communication device.

Background technique

Currently, a centralized unit (CU)-distributed unit (DU) separation architecture is supported in the long term evolution (LTE) system, that is, the base station supports one CU and multiple DUs; wherein the CU has wireless Resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP), public data node (public data access point, PDAP) protocol layer, DU has a radio link control (radio link control, RLC) layer , a medium access control (medium access control, MAC) layer, and a physical layer (physical layer, PHY) layer.

The standard also supports that the LTE base station can connect to the 5G core network of the new radio access technology (new radio, NR). How to choose a core network.

SUMMARY OF THE INVENTION

The present invention provides a core network type indication method and communication device, which realize the core network type indication in the CU-DU separation architecture of NR, so as to further complete the core network selection.

In a first aspect, a method for core network type indication is provided, and the method includes:

The first network node sends a first message to the second network node, where the first message is used to indicate the core network type supported by the first network node and the second network node, and realizes the core network of the first network node and the second network node. Type indicates communication.

In a possible implementation, the first network node only includes the radio link control layer, the medium access control layer and the physical layer; the second network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer; or,

The first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer, and the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

In a possible implementation, the first network node is a distributed unit DU, and the second network node is a centralized unit CU; or, the first network node is a CU, and the second network node is a DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In a possible implementation, the first message includes core network type public land mobile network PLMN information and/or tracking area code TAC information.

In another possible implementation, the first message includes cell barring information of the core network type.

In a possible implementation, before the first network node sends the first message to the second network node, the method further includes:

The first network node receives the second message, and the second message is used to determine the core network type;

The first network node determines the core network type according to the second message.

In a second aspect, a method for core network type indication is provided, the method includes:

The second network node receives the first message sent by the first network node, and the first message is used to indicate the core network type supported by the second network node and the first network node, and realize the core network type of the first network node and the second network node. The net type indicates the communication.

In a possible implementation, the second network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer, and the first network node only includes the radio link control layer, the medium access control layer and the physical layer; or,

The second network node only includes the radio link control layer, the medium access control layer and the physical layer, and the first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer.

In a possible implementation, the first network node is a distributed unit DU, and the second network node is a centralized unit CU; or, the first network node is a CU, and the second network node is a DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In a possible implementation, the first message includes core network type public land mobile network PLMN information and/or tracking area code TAC information.

In another possible implementation, the first message includes cell barring information of the core network type.

In a third aspect, a method for core network type indication is provided, and the method includes:

The first network node sends a first message to the second network node, where the first message is used to indicate the type of the core network that the terminal is connected to at the third network node, which implements the core network type indication communication between the first network node and the second network node .

In a possible implementation, the first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer; the second network node only includes the radio link control layer, the medium access control layer and the physical Floor.

In one possible implementation, the first network node is a centralized unit CU, and the second network node is a distributed unit DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In one possible implementation, the method also includes:

The first network node receives the second message sent by the third network node, where the second message includes the information of the core network type.

In a possible implementation of the present invention, the method further includes:

The first network node receives a third message sent by the second network node, where the third message includes handover configuration information, and the handover configuration information is generated by the second network node according to the core network type to which the terminal is connected to the third network node.

In a fourth aspect, a method for core network type indication is provided, the method comprising:

The second network node receives the first message sent by the first network node, where the first message is used to indicate the type of the core network that the terminal is connected to at the third network node, and realizes the core network type indication of the first network node and the second network node communication.

In a possible implementation, the second network node only includes the radio link control layer, the media access control layer and the physical layer; the first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol Floor.

In a possible implementation, the second network node is a distributed unit DU and the first network node is a centralized unit CU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In one implementation, the method further includes:

The second network node generates handover configuration information according to the core network type to which the terminal is connected at the third network node;

The second network node sends a third message to the first network node, where the third message includes handover configuration information for the first network node to send the handover configuration information to the third network node.

In a fifth aspect, a communication device is provided, the communication device comprising:

The sending unit is configured to send a first message to the second network node, where the first message is used to indicate the core network type supported by the communication device and the second network node, so as to realize the communication device and the second network node indicating the core network type communication .

In a possible implementation, the communication device only includes a radio link control layer, a medium access control layer and a physical layer; the second network node only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; or,

The communication device only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer, and the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

In a possible implementation, the communication device is a distributed unit DU, and the second network node is a centralized unit CU; or, the communication device is a CU, and the second network node is a DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In a possible implementation, the first message includes core network type public land mobile network PLMN information and/or tracking area code TAC information.

In another possible implementation, the first message includes cell barring information of the core network type.

In a possible implementation, the communication device further includes a receiving unit and a processing unit;

a receiving unit, configured to receive a second message, where the second message is used to determine the core network type;

The processing unit is configured to determine the core network type according to the second message.

In a sixth aspect, a communication device is provided, the communication device comprising:

The receiving unit is configured to receive the first message sent by the first network node, where the first message is used to indicate the core network type supported by the communication device and the first network node, and realizes the core network type indication of the first network node and the communication device communication.

In a possible implementation, the communication device only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer, and the first network node only includes a radio link control layer, a medium access control layer and a physical layer; or,

The communication device only includes a radio link control layer, a medium access control layer and a physical layer, and the first network node only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

In a possible implementation, the first network node is a distributed unit DU, and the communication device is a centralized unit CU; or, the first network node is a CU, and the communication device is a DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In a possible implementation, the first message includes core network type public land mobile network PLMN information and/or tracking area code TAC information.

In another possible implementation, the first message includes cell barring information of the core network type.

In a seventh aspect, a communication device is provided, the communication device comprising:

The sending unit is configured to send a first message to the second network node, where the first message is used to indicate the core network type to which the terminal is connected to the third network node, and implements core network type indication communication between the communication device and the second network node.

In a possible implementation, the communication device only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer; the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

In one possible implementation, the communication device is a centralized unit CU and the second network node is a distributed unit DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In a possible implementation, the communication apparatus further includes a receiving unit, configured to receive a second message sent by the third network node, where the second message includes core network type information.

In a possible implementation of the present invention, the receiving unit is further configured to receive a third message sent by the second network node, where the third message includes handover configuration information, and the handover configuration information is the second network node according to the terminal in the third network The core network type to which the node is connected is generated.

In an eighth aspect, a communication device is provided, the communication device comprising:

The receiving unit is configured to receive the first message sent by the first network node, where the first message is used to indicate the core network type to which the terminal is connected at the third network node, and realizes the core network type indication communication between the first network node and the communication device .

In a possible implementation, the communication device only includes the radio link control layer, the medium access control layer and the physical layer; the first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer.

In one possible implementation, the communication device is a distributed unit DU and the first network node is a centralized unit CU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

In one implementation, the communication device further includes a processing unit and a sending unit;

the processing unit, configured to generate handover configuration information according to the core network type to which the terminal is connected at the third network node;

The sending unit is configured to send a third message to the first network node, where the third message includes handover configuration information, so that the first network node sends the handover configuration information to the third network node.

In a ninth aspect, a communication device is provided, including a processor, where the processor is coupled to a memory to read and execute instructions in the memory to achieve:

A first message is sent to the second network node, where the first message is used to indicate the core network type supported by the communication device and the second network node.

In a possible implementation, the communication device only includes a radio link control layer, a medium access control layer and a physical layer; the second network node only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; or,

The communication device only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer, and the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

In a possible implementation, the communication device is a distributed unit DU, and the second network node is a centralized unit CU; or, the communication device is a CU, and the second network node is a DU.

In another possible implementation, the first message includes at least one of core network type public land mobile network PLMN information and tracking area code TAC information.

In another possible implementation, the first message contains core network type cell barring information.

In one possible implementation, the processor is also used to read and execute instructions in memory to:

receiving a second message, where the second message is used to determine the core network type;

The core network type is determined according to the second message.

Optionally, in one possible implementation, the communication device further includes a memory.

In a tenth aspect, a communication device is provided, including a processor, where the processor is coupled to a memory, and reads and executes instructions in the memory to achieve:

A first message sent by the first network node is received, where the first message is used to indicate the core network type supported by the communication apparatus and the first network node.

In a possible implementation, the communication device only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer, and the first network node only includes a radio link control layer, a medium access control layer and a physical layer; or,

The communication device only includes a radio link control layer, a medium access control layer and a physical layer, and the first network node only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

In a possible implementation, the communication device is a distributed unit DU, and the first network node is a centralized unit CU; or, the communication device is a CU, and the first network node is a DU.

In another possible implementation, the first message includes at least one of core network type public land mobile network PLMN information and tracking area code TAC information.

In another possible implementation, the first message includes cell barring information of the core network type.

In one possible implementation, the communication device further includes a memory.

In an eleventh aspect, a communication device is provided, including a processor, the processor is coupled to a memory, and reads and executes instructions in the memory to achieve:

Send a first message to the second network node, where the first message is used to indicate the core network type to which the terminal is connected to the third network node.

In a possible implementation, the communication device only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer; the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

In one possible implementation, the communication device is a centralized unit CU and the second network node is a distributed unit DU.

In one possible implementation, the processor is also used to read and execute instructions in memory to:

A second message sent by a third network node is received, where the second message includes core network type information.

In one possible implementation, the processor is also used to read and execute instructions in memory to:

A third message sent by the second network node is received, where the third message includes handover configuration information, and the handover configuration information is generated by the second network node according to the core network type to which the terminal is connected to the third network node.

In one possible implementation, the communication device further includes a memory.

A twelfth aspect provides a communication device, including a processor, where the processor is coupled to a memory, and reads and executes instructions in the memory to achieve:

A first message sent by the first network node is received, where the first message is used to indicate the core network type to which the terminal is connected at the third network node.

In a possible implementation, the communication device only includes the radio link control layer, the medium access control layer and the physical layer; the first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer.

In one possible implementation, the communication device is a distributed unit DU and the first network node is a centralized unit CU.

In one possible implementation, the processor is also used to read and execute instructions in memory to:

generating handover configuration information according to the core network type to which the terminal is connected to the third network node;

A third message is sent to the first network node, where the third message includes handover configuration information for the first network node to send the handover configuration information to the third network node.

In one possible implementation, the communication device further includes a memory.

A thirteenth aspect provides a system including the ninth aspect or any possible implementation of the ninth aspect, and the tenth aspect or any possible implementation of the tenth aspect. The communication device; or, the The system includes the communication apparatus of the eleventh aspect or any possible implementation of the eleventh aspect, and the communication apparatus of the twelfth aspect or any possible implementation of the second aspect.

A fourteenth aspect provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, any one or more of the foregoing first to fourth aspects are implemented. method described. Methods.

A fifteenth aspect provides a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the method described in any one or more of the above-mentioned first to fourth aspects.

Based on the provided method and communication device for indicating the type of the core network, the type of the core network is indicated through the information sent between the first network node and the second network node, so that the first network node and the second network node can Select the core network based on the network type.

Description of drawings

1 is a schematic diagram of a system architecture according to an embodiment of the present invention;

2 is a schematic diagram of a control plane protocol stack provided by an embodiment of the present invention;

3 is a schematic diagram of a user plane protocol stack provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a CU-DU architecture of an ng-eNB according to an embodiment of the present invention;

FIG. 5(a) and FIG. 5(b) are respectively schematic diagrams of the architecture of MCG separation bearer selection under the MR-DC architecture provided by an embodiment of the present invention;

FIG. 6(a) and FIG. 6(b) are respectively schematic diagrams of the architecture of SCG bearer selection under the MR-DC architecture provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of an architecture of SCG separation bearer selection under an MR-DC architecture according to an embodiment of the present invention;

8 is a schematic diagram of functional segmentation of a CU of an ng-eNB and a DU of an ng-eNB according to an embodiment of the present invention;

FIG. 9 is a flowchart of a method for indicating a core network type according to an embodiment of the present invention;

10 is a schematic flowchart of another core network type indication method provided by an embodiment of the present invention;

11 is a schematic flowchart of another core network type indication method provided by an embodiment of the present invention;

12 is a schematic flowchart of still another core network type indication method provided by an embodiment of the present invention;

13 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present invention;

15 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of another communication apparatus according to an embodiment of the present invention.

Detailed ways

The current standard can support LTE base stations to connect to NR 5G core network (core network), and its system architecture is shown in Figure 1, where the 5G core network can be referred to as 5GC for short. The system shown in FIG. 1 may be called eLTE or NG-LTE, or may be directly called LTE connected to 5GC, or E-UTRAN connected to 5GC, or LTE/5GC. LTE base stations that support connecting to 5GC are called ng-eNBs.

5GC includes an Access Management Function (AMF), a Session Management Function (SMF), and a User Plane Function (UPF). The function of AMF is similar to that of MME in LTE; the functions of UPF and SMF are close to that of SGW+PGW in LTE. The ng-eNB and the gNB communicate through the interface Xn, and the ng-eNB, the gNB and the AMF and UPF in the 5GC communicate through the interface NG, as shown in Figure 1.

Under this system, the corresponding control plane protocol stack is shown in Figure 2, and the corresponding user plane protocol stack is shown in Figure 3. In FIG. 2 , the packet data convergence protocol (PDCP) may adopt the PDCP of E-UTRT, or adopt the PDCP of NR. In FIG. 3, PDCP adopts PDCP of NR.

FIG. 4 is a schematic diagram of a CU-DU architecture of an ng-eNB according to an embodiment of the present invention, and FIG. 4 is a schematic diagram of a basic CU-DU architecture of an ng-eNB. The CU-DU architecture of the ng-eNB may also be the scenarios shown in FIG. 5(a), FIG. 5(b), FIG. 6(a), FIG. 6(b), and FIG. 7 . Fig. 5(a) and Fig. 5(b) are respectively schematic diagrams of the architecture of the separation and bearer selection of the master cell group (MCG) under the MR-DC architecture; Fig. 6(a) and Fig. 6(b) are respectively Under the MR-DC architecture, a schematic diagram of the architecture of the secondary cell group (secondary cell group, SCG) bearer selection; FIG. 7 is a schematic diagram of the architecture of the SCG separation bearer selection under the MR-DC architecture. Among them, the MR-DC architecture is that the ng-eNB acts as the primary base station to support the CU-DU separation architecture, and the gNB acts as the auxiliary base station for transmission of multi-stream aggregation.

In the ng-eNB, the segmentation of the protocol layer is performed at the PDCP and radio link control (RLC) layers, as shown in Figure 8, that is, the CU of the ng-eNB has radio resource control (radio resource control) layers. resource control, RRC) or part of the RRC control function, including all the protocol layer functions or part of the protocol layer functions of the existing base station; for example, only includes the RRC function or part of the RRC function, or includes the RRC function or the service data adaptation protocol (service data adaptation protocol) protocol, SDAP) layer function, or include RRC/packet data convergence protocol (packet data convergence protocol, PDCP) layer function, or include RRC/PDCP and some RLC layer functions of radio link control protocol; or include RRC/PDCP/media access Control (media access control, MAC) layer, even part or all of the physical layer PHY function, does not rule out any other possibility, the DU of the ng-eNB has all or part of the protocol layer functions of the existing base station, namely RRC/SDAP/PDCP Part of the protocol layer functional units of /RLC/MAC/PHY, such as including some RRC functions and PDCP/RLC/MAC/PHY and other protocol layer functions, or including PDCP/RLC/MAC/PHY and other protocol layer functions, or including RLC/MAC /PHY and other protocol layer functions either include part of RLC/MAC/PHY functions, or only include all or part of PHY functions; it should be noted that the functions of each protocol layer mentioned here may change, which are all within the scope of protection of this application . Wherein, FIG. 8 is a schematic diagram of functional division of the CU of the ng-eNB and the DU of the ng-eNB.

Based on eLTE, the embodiments of the present invention provide a core network type indication method and communication device, which are applicable to the CU-DU architecture of ng-eNB.

In the embodiment of the present invention, the mentioned core network type information of the base station may refer to a core network (Evolved Packet Core, EPC) that only supports connection to LTE, only supports connection to a 5G core network (5GC), and supports connection to EPC and EPC at the same time. 5GC, that is, the base station only supports connecting to EPC, or only supports connecting to 5GC, or the base station supports connecting to EPC and 5GC at the same time.

Each PLMN can support one of the three core network types, that is, each PLMN can only support connecting to EPC, or only to connect to 5GC, or to connect to both EPC and 5GC.

Different core network types correspond to different TAC values, that is, cells under EPC have TACs of EPC; cells under 5GC have TACs of 5GC; wherein, each PLMN of cells under 5GC can also have different TACs.

Cells under different core network types have different cell barred information, that is, cells under EPC have cell barred information of EPC, and cells under 5GC have cell barred information of 5GC.

The method for indicating the core network type provided by the embodiment of the present invention will be described below with reference to the accompanying drawings. It should be noted that, in this embodiment of the present invention, "first", "second" and "third" are only for distinguishing network nodes and messages, and do not limit network nodes and messages themselves.

FIG. 9 is a flowchart of a method for indicating a core network type according to an embodiment of the present invention. As shown in Figure 9, the method may include the following steps:

S110, the first network node sends a first message to the second network node.

The first message is used to indicate the core network type supported by the first network node and the second network node. Here, "supported" can also be understood as "supported connection", wherein "supported connection" may refer to the direct connection between the first network node or the second network node and the core network, or the first network node or The second network node is indirectly connected to the core network through other elements.

Specifically, the first message is used to indicate the core network type supported by the network configuration information, where the network configuration information may be at least one of PLMN, TAC, cell barring information, and the like.

Optionally, in an embodiment, the first network node only includes at least one of the radio link layer control RLC protocol layer, the medium access control MAC layer, and the physical PHY layer; the second network node only includes the radio resource control RRC At least one of the protocol layer, the service data adaptation layer SDAP and the packet data convergence PDCP protocol layer; or,

The first network node only includes at least one of the RRC protocol layer, the service data adaptation layer SDAP and the PDCP protocol layer, and the second network node only includes at least one of the RLC protocol layer, the MAC layer and the PHY layer.

Optionally, in one embodiment, the first network node is a DU, and the second network node is a CU; or, the first network node is a CU, and the second network node is a DU. The DU and the CU send the first message through the interface between them, and the interface between the DU and the CU may be referred to as the W1 interface. The W1 interface may be an existing W1 interface or a newly defined W1 interface. In this embodiment of the present invention, if the W1 interface is a newly defined interface, the W1 interface may also have other names, and the name of the newly defined interface is not limited in this embodiment of the present invention.

Before describing the core network type indication of the interaction between the first network node and the second network node, let's take a look at some conclusions raised during the eLTE discussion:

1. A new public land mobile network (PLMN) list is introduced for the 5GC, and the newly introduced PLMN list includes at least one PLMN that can be connected to the 5GC.

2. The function of providing cell barring identifiers for UEs with 5GC-NAS, and introducing a new cell barring identifier, such as "cell barring-5GC". In the case that all PLMNs can only be connected to 5GC, the newly introduced cell barring identifier can be used to identify the 5GC that the cell is barred from accessing. However, for the UE capable of accessing the EPC in the EPC-NAS, the situation that the cell is prohibited from being accessed can be ignored. The cell prohibition identifier may be included in a system information block 1 (system information block, SIB1).

3. A new tracking area code (TAC) field for 5GC is introduced. The TAC field can be a 3-byte field, which is distinguished from the TAC field for EPC. The TAC field for EPC is 2 byte field.

And the PLMN of 5GC can broadcast a separate TAC, that is, the eNB can broadcast two TACs for each PLMN connected to EPC and 5GC, one for E-UTRA connected to EPC and one for E-UTRA connected to 5GC. This case applies to both the radio access network (RAN) sharing case and the non-RAN sharing case.

Based on some conclusions raised in the above eLTE discussion process, optionally, in an embodiment of the present invention, the first message may include at least one of PLMN information and TAC information of the core network type. In this embodiment of the present invention, when the UE is connected to different core networks, such as EPC and/or 5GC, the core network type indication for interaction between CU-DUs may exist in the following forms:

1. Explicitly indicate the core network type. For example, the CU and DU send the first message through the W1 interface. The first message includes at least one of PLMN information and TAC information, and the first message also includes a core network type information CN. type, the CN type is used to indicate which core network the PLMN or TAC supports; optionally, the TAC information may be an implicit indication, that is, it includes two TACs, one is the TAC of the EPC, and the other is the TAC of the 5GC TAC; Optionally, the PLMN may also be an implicit indication, that is, it includes two PLMNs, one is the PLMN of the EPC, and the other is the PLMN of the 5GC. Optionally, the PLMN information in the first message may include TAC information, or the TAC information and the PLMN information may exist independently as separate information elements. For example, the specific information element: the first message includes information CN type that explicitly indicates the core network type, as shown in instance 1, instance 2, instance 3, instance 4 and instance 5. The PLMN information may also be referred to as a PLMN information element, and its specific form may be a PLMN list.

Example 1

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs) M >PLMN ID M >CN type >TAC Information >>TAC-EPC M >>TAC-5GC O

Example 2

Example 3

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs) M >PLMN ID M >CN type TAC information >TAC-EPC M >TAC-5GC O

Example 4

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs) M >PLMN ID M >TAC Information M >CN type O

Example 5

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs) M >PLMN ID M >CN type TAC information >TAC M >CN type

It should be noted that the meanings of the states in the above table are that M means a mandatory option, and O means an optional option. The M and O in the above table are just an example. In fact, the cell in the above table can be either M or M. is O, and the present invention is not limited.

2. Implicitly indicate the core network type. For example, the CU and DU send the first message through the W1 interface. The first message includes two PLMN information. The two PLMN information respectively represent the PLMN information supporting EPC and the PLMN information supporting 5GC, such as Examples 6 and 7 are shown. The core network type is implicitly indicated by two PLMN messages.

Example 6

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs)-EPC >PLMN ID M >TAC-EPC M Broadcast PLMNs (broadcast PLMNs)-5GC O >PLMN ID M >TAC-5GC M

Example 7

IE/group name state CGI M PCI M TAC information >TAC-EPC M >TAC-5GC O Broadcast PLMNs (broadcast PLMNs) >PLMN ID M Broadcast PLMNs (broadcast PLMNs)-5GC O >PLMN ID M

The first message includes PLMN information and/or TAC information for each cell. Each cell is identified by a cell identifier, and the cell identifier may be identified by a global cell identifier (cell global identifier, CGI) and a physical cell identifier (Physical Cell Identifier, PCI).

In an embodiment of the present invention, the PLMN information may further include TAC information, as shown in Example 1 and Example 4. In Example 1, the TAC information may be an implicit or explicit indication. Specifically, the implicit indication may include TAC-EPC for identifying EPC-supporting TAC information and TAC-5GC for identifying 5GC-supporting TAC information. For example, if the TAC of the cell is TAC-5GC, after receiving the first message, the target node can know that the cell supports 5GC; if the TAC of the cell is TAC-EPC, then the target node receives the first message. After the message is received, it can be known that the cell supports 5GC. If the TAC indication of the cell is TAC-EPC and TAC-5GC, after receiving the first message, the target node can know that the cell supports both 5GC and EPC. Optionally, in an embodiment of the present invention, TAC-EPC and TAC-5GC can be distinguished by bytes. TAC-EPC is 2 bytes and TAC-5GC is 3 bytes.

In this embodiment of the present invention, the PLMN information and the TAC information may also be directly included in the first message as an information element, respectively, as shown in Example 2, Example 3, and Example 5. It should be noted that, the PLMN and the TAC may respectively indicate implicitly or indicate explicitly.

In Example 6 and Example 7, the core network type is implicitly indicated by two PLMN information. One PLMN information is used to indicate that EPC is supported, and the other PLMN information is used to indicate that 5GC is supported. In Example 6, each PLMN information may include a PLMN identity and TAC information. Optionally, in an embodiment, when the PLMN information and the TAC information of the cell are used to indicate that the supported core network type is EPC, the first message includes the PLMN information of the EPC.

Optionally, in another embodiment, when the PLMN information and TAC information of the cell are used to indicate that the supported core network type is 5GC, the first message includes PLMN information of 5GC.

Optionally, in another embodiment, when the PLMN information and TAC information of the cell are used to indicate that the supported core network types are EPC and 5GC, the first message includes the PLMN information of the EPC and the PLMN information of the 5GC.

In Example 7, the PLMN information and the TAC information are separately included in the first message. The first message may include two pieces of TAC information and two pieces of PLMN information, which are respectively used to indicate that the supported core network types are EPC and 5GC.

Optionally, in an embodiment of the present invention, the first message may further include information about slice support, and optionally, the information about slice support may be included in PLMN information.

Optionally, in an embodiment of the present invention, the TAC information in the first message may also be of PLMN granularity, that is, for a cell supporting EPC, each PLMN has a different TAC-EPC, and for a cell supporting 5GC, Each PLMN has a different TAC-5GC.

Optionally, in this embodiment of the present invention, when the first message includes PLMN information and/or TAC information, the first message may be a W1 interface setup request message, or a W1 interface setup response message, or a W1 interface configuration update message. , or W1 interface configuration update response message and other messages.

Optionally, in an embodiment of the present invention, in addition to the PLMN and/or TAC information, the first message may further include cell barred (cell barred) information to indicate the core network type of the cell barred information. For the specific form of the cell barring information, please refer to the description of Example 12, Example 13 and Example 14. Of course, the first message may not contain cell barring information. When the second network node receives the first message, it can determine the type of core network indicated to connect according to the PLMN information and/or TAC information in the first message, and then Determine the core network type of the cell barring information.

Optionally, in an embodiment of the present invention, the first message may include cell barred (cell barred) information of the core network type to indicate the core network type of the cell barred information.

That is to say, the cell barring information may be included in the first message together with the PLMN information and/or the TAC information, or may be included in the first message alone, or included in a new message, which is not discussed in the present invention. limited.

The core network type is selected by using the explicit indication or implicit indication of the core network type in the interaction between the CU and the DU.

Optionally, as shown in FIG. 9, before the first network node sends the first message to the second network node, the method may further include:

S120, the first network node receives the second message.

The first network node receives the second message sent by the management node, and the management node may be an operation, management and maintenance (operation, administration and maintenance, OAM) network manager, or other centralized management node, which is not performed in this embodiment of the present invention. limited.

The management node configures PLMN information, TAC information and core network type (CN type) information for the first network node, and sends the configured PLMN information, TAC information and core network type information to the first network node through a second message, Optionally, it can also be sent through other existing messages or new messages, which is not limited in the present invention. It should be noted that the core network type information may be a display indication, or may also be an implicit indication, such as the display indication methods shown in example 8 and example 9, such as the implicit indication methods of example 10 and example 11 .

Example 8

IE/group name state CGI M PCI M TAC information M Broadcast PLMNs (broadcast PLMNs) >PLMN ID M >CN type

Example 9

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs) >PLMN ID >TAC Information M >CN type

Example 10

IE/group name state CGI M PCI M TAC-EPC M Broadcast PLMNs (broadcast PLMNs)-EPC >PLMN ID M TAC-5GC Broadcast PLMNs (broadcast PLMNs)-5GC >PLMN ID

Example 11

IE/group name state CGI M PCI M Broadcast PLMNs (broadcast PLMNs)-EPC >PLMN ID >TAC Information Broadcast PLMNs (broadcast PLMNs)-5GC O >PLMN ID >TAC Information

It should be noted that the meanings of the states in the above table are that M means a mandatory option, and O means an optional option. M and O in the above table are just an example. In fact, the cells in the above table can be M or M. is O, and the present invention is not limited.

As shown in Example 8, the second message includes cell identifiers CGI and PCI, as well as TAC information and PLMN information, wherein the PLMN information includes the PLMN identifier and core network type information.

As shown in Example 9, the second message includes cell identity CGI, PCI, and PLMN information, wherein the PLMN information includes PLMN identity and TAC information and core network type (CN type) information.

As shown in Example 10, the second message includes cell CGI, PCI, two PLMN information and two TAC information, wherein one PLMN information is used to identify the PLMN of the EPC, and the other PLMN information is used to identify the PLMN of the 5GC; one TAC The information is used to identify the TAC of the EPC, and the other TAC information is used to identify the TAC of the 5GC.

As shown in Example 11, the second message includes cell CGI, PCI, and two PLMN information, wherein the PLMN information includes TAC information.

Optionally, in this embodiment of the present invention, if the first network node is a DU and the second network node is a CU, after receiving the PLMN information, TAC information and CN type configured by the management node, the DU determines that each cell corresponds to Each PLMN and TAC indicate the connected core network type. Further, the first message is sent to the CU through the W1 interface, and the core network type of the information is explicitly or implicitly indicated in the first message. The interaction of core network type indication of PLMN information and TAC information between DU and CU is realized.

In addition, after receiving the information configured by the management node, the DU can also explicitly or implicitly indicate the core network type in the broadcast message when broadcasting the message to the terminal, so as to indicate the core network type that the UE can connect to. The manner in which the core network type is explicitly or implicitly indicated in the broadcast message is the same as the manner in which the core network type is explicitly or implicitly indicated in S110, which is not repeated here for brevity.

In one embodiment, if the first network node is a CU and the second network node is a DU, after the CU receives the PLMN information, TAC information and CN type configured by the management node, the CU can determine the core supported by each cell Net type. In order to let the DU know the type of core network supported by each cell, the CU sends a first message to the DU through the W1 interface, and explicitly or implicitly indicates the type of the core network in the first message. The interaction of the core network type indication of the PLMN information and the TAC information.

No matter whether the CU obtains the PLMN information, TAC information, and the corresponding core network type information from the management node or the DU, when the CU obtains these information, it can determine the core network type supported by each cell and execute the correct execution. The following process:

For example, paging: when the CU receives a paging message from the core network, the CU determines the core network type according to the paging identity information (UE paging identity) in the paging message, so that the CU sends the paging message to the DU. The paging information corresponding to the core network type is filled in the message, wherein, for EPC paging, the UE paging identifier is S-TMSI; for 5GC paging, the UE paging identifier is 5G-S-TMSI. When the CU cannot determine the core network type according to the paging identifier, the CU determines the core network type through the TAI in the paging message, and the corresponding relationship between the PLMN information, TAC information and the corresponding core network type information obtained by the CU, and then in the The paging information corresponding to the core network type is filled in the paging message sent by the CU to the DU to complete the paging.

For another example, handover restriction list (handover restriction list): after the CU receives the handover restriction information (or referred to as the handover restriction list) sent by the core network, the CU stores the PLMN information, TAC information, and the corresponding core network type information according to the stored PLMN information, TAC information. Determine which PLMNs and/or TACs are restricted from using which core network, so that processes such as handover can be performed correctly.

For another example, the core network interface is established: after the CU receives the PLMN information and TAC information sent by the DU, the CU establishes an interface with the core network. In the process of establishing the interface, the CU sends the PLMN information and TAC information that support each core network type. To the corresponding core network, for example, when establishing an interface with EPC, send the PLMN information and TAC information supporting EPC to EPC; or when establishing an interface with 5GC, send 5GC supporting PLMN information and TAC information to 5GC. The establishment process of the interface between the CU and the core network is realized.

In the embodiment of the present invention, after the DU obtains the PLMN information, the TAC information, and the corresponding core network type information, it can determine the core network supported by the cell, so that the broadcast message can be correctly sent to the UE and indicate the Information about the core network that the corresponding cell can connect to.

The method for indicating the core network type provided by the embodiment of the present invention solves the problem of indicating the core network type corresponding to the PLMN and TAC related to the cell during the interaction process between the CU and the DU, so that the DU can correctly report to the UE. Broadcast messages, so that the CU can correctly perform paging, handover restriction, interface establishment and other processes.

For cell barring information, whether to perform cell barring access may be determined by the CU or DU. If the CU determines whether to bar access to a cell, in one embodiment, the CU may determine whether to bar access to a cell according to neighboring cell information. Certainly, the CU may also determine whether to bar access to a cell by using other existing or new technical methods, which is not limited in this embodiment of the present invention.

An embodiment of the present invention further provides a method for indicating a core network type. As shown in FIG. 10 , FIG. 10 is a schematic flowchart of another method for indicating a core network type provided by an embodiment of the present invention. As shown in Figure 10, the method may include the following steps:

210. The CU sends a first message to the DU, where the first message includes cell barring information.

After the CU determines the cell prohibition information of each core network, the CU sends the first message to the DU through the W1 interface. The first message contains the cell prohibition information. The cell prohibition information is used to indicate the core network type, that is, the cell prohibition information includes the prohibition of terminal access. Incoming cell, the core network type supported by the cell.

It should be noted that the cell barring information may be of core network granularity, that is, there is cell barring information of EPC for a cell under EPC, and cell barring information of 5GC for a cell of 5GC. Alternatively, the cell barring information may also be of PLMN granularity, that is, for a cell under the EPC, there are cell barring information of PLMN1 of the EPC, cell barring information of PLMN2, and the like. It should also be noted that the cell barring information is used to indicate whether the UE can access the cell. For example, the cell barring information of a certain cell is the cell barring information of the 5GC, then if the UE wants to access the 5GC, it cannot pass the The cell is connected to 5GC.

In this embodiment of the present invention, the core network type of the cell barring information may be indicated explicitly or implicitly. For example, the core network type of the cell barring information is explicitly indicated by including one core network type in the first message; the core network type is implicitly indicated by including two cell barring messages in the first message, wherein the two cell barring messages are respectively is the cell barring information of two different core networks. The specific form of the cell barring information may be a list.

Example 12 and Example 13 show the core network type display and indication manner of the cell barring information. In Example 12, the cell barring list includes core network type (CN type) information, a cell identity (CGI) list, and cell barring information. The cell identifier (CGI) list includes the cell identifier of the cell used to access the EPC and the cell identifier of the cell used to access the 5GC, and corresponding CGI information is selected according to the indication of the CN type. The cell barring information includes the cell barring information of the EPC or 5GC core network type, and the corresponding cell barring information is selected according to the indication of the CN type. In Example 12, taking the cell barring information of which the cell barring information is EPC as an example, the terminal is barred from accessing the core network whose core network type is EPC through the cell.

Example 12

Example 13

IE/group name state cell barred list >cell barred list item >>CN type M >>CGI M >>cell barred info M

It should be noted that the meanings of the states in the above table are that M means a mandatory option, and O means an optional option. M and O in the above table are just an example. In fact, the cells in the above table can be M or M. is O, and the present invention is not limited.

In implementation 13, the first message includes a cell barring list, and the cell barring list includes core network type (CNtype) information, a cell identification CGI, and cell barring information. In example 13, through the core network type information in the cell barring list, the cell identification CGI and the cell barring information indicate that the terminal is barred from accessing which type of core network through which cells. Assuming that the core network type information included in the cell barring list in example 13 is EPC, the cell identifier CGI is cell 1, and the cell barring information indicates information that the terminal is prohibited from accessing, then this example prohibits the terminal from accessing the EPC network through cell 1.

Example 14 shows an implicit way of indicating the core network type of the cell barring information. Example 14 includes two cell barring information, one of the two cell barring lists is used to represent the cell barring information that the core network type is EPC, and the other cell barring list is used to represent the cell barring information that the core network type is 5GC .

Optionally, in this embodiment of the present invention, the cell barring information may be an enumeration type, such as ENUMERATED{barred,notBarred}.

Example 14

IE/group name state Cell Prohibition List M >CGI M >cell barred information M Cell Ban List - 5GC O >NR-CGI M > Cell Barring Information - 5GC M

It should be noted that the meanings of the states in the above table are that M means a mandatory option, and O means an optional option. M and O in the above table are just an example. In fact, the cells in the above table can be M or M. is O, and the present invention is not limited.

Optionally, in this embodiment of the present invention, the first message may be a DU configuration update message, a DU configuration update response message, a CU configuration update message, a CU configuration update response message, a W1 interface establishment request/response message, a bearer content setting/ Modification request/response (eg, bearer context setup/modification request/response) messages, bearer content modification request/confirmation (eg, bearer context modification required/confirm) messages and other messages.

Optionally, in an embodiment of the present invention, as shown in FIG. 10 , the method may further include:

S220, the DU sends a modification message to the CU, where the modification message includes the modified cell barring information.

After the DU receives the first message sent by the CU, the DU determines whether to change the cell barring information according to the current load or other information. For example, the cell barring information in the first message received by the DU indicates that the type of the terminal being barred from accessing the core network is: In the core network of EPC, after DU determines according to various required information, the terminal should also be prohibited from accessing the core network whose core network type is 5GC. Then DU changes the cell prohibition information and passes the changed cell prohibition information through the W1 interface. sent to the CU.

Optionally, in this embodiment of the present invention, as shown in FIG. 10 , the method may further include:

S230, the CU sends a confirmation message to the DU.

After receiving the modification message sent by the DU, the CU further determines, via the CU, whether the cell barring information needs to be changed again, and sends a confirmation message to the DU to determine the cell barring information.

The cell barring information can also be determined by the DU. The method for indicating the core network type of the cell barring information determined by the DU is shown in Figure 11. The method may include the following steps:

S310, the DU sends a first message to the CU, where the first message includes cell barring information.

In this embodiment of the present invention, the DU may determine cell barring information by using an existing or newly created method, which is not limited in this embodiment of the present invention. After the DU determines the cell barring information, it sends a first message to the CU through the W1 interface. The first message includes the cell barring information, and the cell barring information is used to indicate which type of core network the terminal is barred from accessing through the cell. In this embodiment of the present invention, the cell barring information may explicitly or implicitly indicate the core network type of the core network to which access is prohibited. The method is the same, and is not repeated here for the sake of brevity.

Optionally, in this embodiment of the present invention, as shown in FIG. 11 , the method further includes:

S320, the CU sends an update message to the DU.

Specifically, after receiving the cell barring information, the CU can further decide whether to update the cell barring information. For example, the core network type of the cell barring information received by the CU is EPC, and the core network type of the cell barring information is determined by the DU according to the fact that the PLMN only supports 5GC. After receiving the cell barring information sent by the DU, the CU further determines whether to perform cell barring on the 5GC. If it is determined that cell barring is also performed on 5GC, the CU may update the cell barring information, and send the updated cell barring information to the DU.

Optionally, in another embodiment of the present invention, when the DU does not send the core network type of the cell prohibition information to the CU, the CU may also determine the core network type of the cell prohibition information according to the acquired PLMN information, specifically the CU. Determine the core network type of the cell barring information according to the core network type indicated in the PLMN information. For example, the PLMN only supports access to 5GC, then it can be determined that the core network type of the cell barring information is EPC.

An embodiment of the present invention further provides a method for indicating a core network type. As shown in FIG. 12 , the method is applied to a scenario of base station handover under the CU-DU architecture. As shown in Figure 12, the method may include the following steps:

S410, the first network node sends the first message to the second network node.

The first message is used to indicate the core network type to which the terminal is connected at the third network node.

Optionally, in an embodiment of the present invention, the first network node only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer; the second network node only includes the radio link control layer, the media interface into the control layer and physical layer.

Optionally, in an embodiment of the present invention, the first network node is a CU, and the second network node is a DU.

In this embodiment of the present invention, the CU and the DU are two network nodes of the target base station. The third network node is the source base station. In the scenario where the terminal performs base station handover, when the CU of the target base station receives the handover request message sent by the source base station, the CU sends a first message to the DU through the W1 interface, where the handover request message includes the core that the terminal is connected to at the source base station. Network type information, the first message is used to indicate the core network type that the terminal is connected to at the source base station. In order to facilitate the second network node to generate handover configuration information according to the core network type to which the terminal indicated by the first message is connected to the third network node.

In this embodiment of the present invention, the first message sent by the CU to the DU may explicitly or implicitly indicate the core network type to which the terminal is connected at the source base station. Explicitly indicating the type of core network that the terminal is connected to at the source base station may specifically include information of the type of the core network that the terminal is connected to at the source base station in the first message.

The specific manner of implicitly indicating the core network type to which the terminal is connected at the source base station may be: for example, indicating the core network type supported by the terminal at the source base station through quality of service (quality of service, QoS) information. Among them, different types of core networks use different QoS information, as shown in Example 11:

Select QOS information M >E-UTRAN QoS M >DRB Information >>DRB QoS M >>Flow Qos M

It should be noted that the meanings of the states in the above table are that M means a mandatory option, and O means an optional option. M and O in the above table are just an example. In fact, the cells in the above table can be M or M. is O, and the present invention is not limited.

The E-UTRAN QoS in the table refers to the QoS used when the target CU connects to the EPC; the DRB information refers to the QoS used when the target CU connects to the 5GC. The type of core network that the terminal is connected to at the source base station is implicitly indicated by the QoS of different core network types.

Optionally, in this embodiment of the present invention, as shown in FIG. 12 , before the first network node sends the first message to the second network node, the method may further include:

S420, the first network node receives the second message.

The second message is sent by the third network node to the first network node. Optionally, in this embodiment of the present invention, the third network node is a source base station. The second message includes information of the core network type to which the terminal is connected at the third network node.

Optionally, in this embodiment of the present invention, as shown in FIG. 12 , the method further includes:

S430, the second network node sends a third message to the first network node.

When the second network node receives the first message sent by the first network node, the second network node generates handover configuration information according to the core network type to which the terminal indicated by the first message is connected to the third network node, and configures the handover configuration Included in the third message and sent to the first network node.

Optionally, the first network node is a CU, and the second network node is a DU. After receiving the first message sent by the CU, the DU generates a handover configuration according to the type of the core network supported by the terminal in the source base station indicated in the first message. information, and send the handover configuration information to the CU, so that after receiving the handover configuration information, the CU sends the handover configuration information to the source base station, and then the source base station sends it to the terminal, thereby completing the terminal handover from the source base station to the target base station.

FIG. 9 to FIG. 12 describe the method for indicating the core network type, and the following describes the first network node and the second network node provided by the embodiment of the present invention with reference to FIG. 13 and FIG. 14 .

FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present invention. As shown in FIG. 13 , the communication device includes a sending unit 1310 .

The sending unit 1310 is configured to send a first message to the second network node, where the first message is used to indicate the core network type supported by the communication device and the second network node, and realizes the core network type indication of the communication device and the second network node communication.

Optionally, in an embodiment of the present invention, the communication device only includes a radio link control layer, a medium access control layer, and a physical layer; the second network node only includes a radio resource control protocol layer, a service data adaptation layer, and a packet data aggregation protocol layer; or,

The communication device only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer, and the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

Optionally, in an embodiment of the present invention, the communication device is a distributed unit DU, and the second network node is a centralized unit CU; or, the communication device is a CU, and the second network node is a DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

Optionally, in an embodiment of the present invention, the first message includes core network type public land mobile network PLMN information and/or tracking area code TAC information.

Optionally, in an embodiment of the present invention, the first message includes cell barring information of the core network type.

Optionally, in an embodiment of the present invention, the communication apparatus further includes a receiving unit 1320 and a processing unit 1330;

a receiving unit 1320, configured to receive a second message, where the second message is used to determine the core network type;

The processing unit 1330 is configured to determine the core network type according to the second message.

Optionally, in an embodiment of the present invention, the communication apparatus may further include a storage unit for storing data and instructions.

The functions of each functional unit in the communication device can be implemented through the steps performed by the first network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication device provided by the embodiments of the present invention The process will not be repeated here.

An embodiment of the present invention further provides a communication device. As shown in FIG. 14 , the communication device includes a receiving unit 1410 .

The receiving unit 1410 is configured to receive a first message sent by the first network node, where the first message is used to indicate the core network type supported by the communication device and the first network node, and realizes the core network type of the first network node and the communication device Indicate communication.

Optionally, in an embodiment of the present invention, the communication device only includes a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer, and the first network node only includes a radio link control layer, a media access control layer, and a layer and physical layer; or,

The communication device only includes a radio link control layer, a medium access control layer and a physical layer, and the first network node only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

Optionally, in an embodiment of the present invention, the first network node is a distributed unit DU, and the communication device is a centralized unit CU; or, the first network node is a CU, and the communication device is a DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

Optionally, in an embodiment of the present invention, the first message includes core network type public land mobile network PLMN information and/or tracking area code TAC information.

Optionally, in an embodiment of the present invention, the first message includes cell barring information of the core network type.

Optionally, in this embodiment of the present invention, the communication device may further include a sending unit 1420, a processing unit 1430, and a storage unit 1440, where the sending unit 1420 is configured to send data information to the first network node, and the storage unit 1440 is configured to store data and instructions, the processing unit 1430 is configured to store information such as data information received from the first network node.

The functions of each functional unit in the communication device can be implemented through the steps performed by the second network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication device provided by the embodiment of the present invention is The process will not be repeated here.

An embodiment of the present invention further provides a communication device, as shown in FIG. 13 .

The sending unit 1310 is configured to send a first message to the second network node, where the first message is used to indicate the type of the core network that the terminal is connected to at the third network node, so as to realize the communication of the core network type indication between the communication device and the second network node .

Optionally, in an embodiment of the present invention, the communication device only includes a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer; the second network node only includes a radio link control layer, a media access control layer layer and physical layer.

Optionally, in an embodiment of the present invention, the communication device is a centralized unit CU, and the second network node is a distributed unit DU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

Optionally, in an embodiment of the present invention, the receiving unit 1320 is configured to receive a second message sent by a third network node, where the second message includes core network type information.

Optionally, in an embodiment of the present invention, the receiving unit 1320 is further configured to receive a third message sent by the second network node, where the third message includes handover configuration information, and the handover configuration information is the second network node according to the terminal Generated at the core network type to which the third network node is connected.

The functions of each functional unit in the communication device can be implemented through the steps performed by the first network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication device provided by the embodiments of the present invention The process will not be repeated here.

An embodiment of the present invention further provides a communication device, as shown in FIG. 14 .

The receiving unit 1410 is configured to receive a first message sent by the first network node, where the first message is used to indicate the core network type that the terminal is connected to at the third network node, and realizes the core network type indication of the first network node and the communication device communication.

Optionally, in an embodiment of the present invention, the communication device only includes a radio link control layer, a medium access control layer, and a physical layer; the first network node only includes a radio resource control protocol layer, a service data adaptation layer, and a packet Data aggregation protocol layer.

Optionally, in an embodiment of the present invention, the communication device is a distributed unit DU, and the first network node is a centralized unit CU. Implemented the indication of core network type for interaction between CU and DU under the CU-DU architecture.

Optionally, in an embodiment of the present invention, the processing unit 1430 is configured to generate handover configuration information according to the core network type to which the terminal is connected at the third network node;

The sending unit 1420 is configured to send a third message to the first network node, where the third message includes handover configuration information, so that the first network node sends the handover configuration information to the third network node.

The functions of each functional unit in the communication device can be implemented through the steps performed by the second network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication device provided by the embodiment of the present invention is The process will not be repeated here.

FIG. 15 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention. As shown in FIG. 15 , the communication device includes a processor 1510, which is coupled to the memory to read and execute instructions in the memory to achieve:

A first message is sent to the second network node, where the first message is used to indicate the core network type supported by the communication device and the second network node.

Optionally, in an embodiment of the present invention, the communication device only includes a radio link control layer, a medium access control layer, and a physical layer; the second network node only includes a radio resource control protocol layer, a service data adaptation layer, and a packet data aggregation protocol layer; or,

The communication device only includes the radio resource control protocol layer, the service data adaptation layer and the packet data convergence protocol layer, and the second network node only includes the radio link control layer, the medium access control layer and the physical layer.

Optionally, in an embodiment of the present invention, the first message includes at least one of core network type public land mobile network PLMN information and tracking area code TAC information.

Optionally, in an embodiment of the present invention, the first message includes cell barring information of the core network type.

Optionally, in an embodiment of the present invention, the processor 1510 is further configured to read and execute the instructions in the memory to achieve:

receiving a second message, where the second message is used to determine the core network type;

The core network type is determined according to the second message.

Optionally, in an embodiment of the present invention, the communication device is a distributed unit DU, and the second network node is a centralized unit CU; or, the communication device is a CU, and the second network node is a DU.

In this embodiment of the present invention, when the communication device is a DU or a CU, the communication device may further include a transceiver 1520, and the processor 1510 reads the instructions in the memory to implement: controlling the transceiver 1520 to send the first information.

In one embodiment, the processor 1510 is further configured to read and execute the instructions in the memory, so as to control the transceiver 1520 to receive the second message, and the processor 1510 determines the core network type according to the second message.

Optionally, in an embodiment of the present invention, the communication apparatus further includes a memory 1530 .

The processor 1510, the transceiver 1520 and the memory 1530 are connected through a communication bus.

The functions of each functional device in the communication device can be implemented through the steps performed by the first network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication device provided by the embodiments of the present invention The process will not be repeated here.

An embodiment of the present invention also provides a communication device. As shown in FIG. 16 , the communication device includes a processor 1610. The processor 1610 is coupled to a memory, and reads and executes instructions in the memory to achieve:

A first message sent by the first network node is received, where the first message is used to indicate the core network type supported by the communication apparatus and the first network node.

Optionally, in an embodiment of the present invention, the communication device only includes a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer, and the first network node only includes a radio link control layer, a media access control layer, and a layer and physical layer; or,

The communication device only includes a radio link control layer, a medium access control layer and a physical layer, and the first network node only includes a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

Optionally, in an embodiment of the present invention, the first message includes at least one of core network type public land mobile network PLMN information and tracking area code TAC information.

Optionally, in an embodiment of the present invention, the first message includes cell barring information of the core network type.

Optionally, in an embodiment of the present invention, the communication device is a distributed unit DU, and the first network node is a centralized unit CU; or, the communication device is a CU, and the first network node is a DU.

When the communication device is a DU or a CU, the communication device may further include a transceiver 1620; the processor 1610 reads and executes the instructions in the memory to implement: controlling the transceiver 1620 to receive the first message sent by the first network node.

Optionally, in an embodiment of the present invention, the communication apparatus further includes a memory 1630 .

The processor 1610, the transceiver 1620 and the memory 1630 are connected through a communication bus.

The functions of each functional device in the communication apparatus can be implemented through the steps performed by the second network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication apparatus provided by the embodiments of the present invention The process will not be repeated here.

An embodiment of the present invention further provides a communication device, as shown in FIG. 15 . The processor 1510 reads and executes the instructions in the memory to:

Send a first message to the second network node, where the first message is used to indicate the core network type to which the terminal is connected to the third network node.

Optionally, in an embodiment of the present invention, the communication device only includes a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer; the second network node only includes a radio link control layer, a media access control layer layer and physical layer.

Optionally, in an embodiment of the present invention, the processor 1510 is further configured to read and execute the instructions in the memory to achieve:

A second message sent by a third network node is received, where the second message includes core network type information.

Optionally, in an embodiment of the present invention, the processor 1510 is further configured to read and execute the instructions in the memory to achieve:

A third message sent by the second network node is received, where the third message includes handover configuration information, and the handover configuration information is generated by the second network node according to the core network type to which the terminal is connected to the third network node.

Optionally, in an embodiment of the present invention, the communication device is a centralized unit CU, and the second network node is a distributed unit DU.

When the communication device is a CU, the communication device further includes a transceiver 1520, and the processor 1510 reads and executes the instructions in the memory to implement: controlling the transceiver 1520 to send the first message to the second network node.

And in one embodiment, the processor 1510 is further configured to read and execute the instructions in the memory, so as to implement: controlling the transceiver 1520 to receive the third message sent by the second network node.

Optionally, in an embodiment of the present invention, the communication apparatus further includes a memory 1530 .

The functions of each functional device in the communication apparatus can be implemented through the steps performed by the first network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication apparatus provided by the embodiments of the present invention The process will not be repeated here.

An embodiment of the present invention also provides a communication device. As shown in FIG. 16 , the processor 1610 reads and executes the instructions in the memory to achieve:

A first message sent by the first network node is received, where the first message is used to indicate the core network type to which the terminal is connected at the third network node.

Optionally, in an embodiment of the present invention, the communication device only includes a radio link control layer, a medium access control layer, and a physical layer; the first network node only includes a radio resource control protocol layer, a service data adaptation layer, and a packet Data aggregation protocol layer.

Optionally, in an embodiment of the present invention, the processor 1610 is further configured to read and execute the instructions in the memory to achieve:

generating handover configuration information according to the core network type to which the terminal is connected to the third network node;

A third message is sent to the first network node, where the third message includes handover configuration information for the first network node to send the handover configuration information to the third network node.

Optionally, in an embodiment of the present invention, the communication device is a distributed unit DU, and the first network node is a centralized unit CU.

When the communication device is a DU, the communication device may further include a transceiver 1620, and the processor 1610 reads and executes the instructions in the memory to implement: controlling the transceiver 1620 to receive the first message sent by the first network node.

And in one embodiment, the processor 1610 reads and executes the instructions in the memory, so as to realize: generate handover configuration information according to the core network type connected to the third network node by the terminal, and control the transceiver 1620 to send the first network node to the first network node. Send a third message.

Optionally, in an embodiment of the present invention, the communication apparatus further includes a memory 1630 .

The functions of each functional device in the communication apparatus can be implemented through the steps performed by the second network node in the embodiments shown in FIG. 9 to FIG. 12 . Therefore, the specific work of the communication apparatus provided by the embodiments of the present invention The process will not be repeated here.

An embodiment of the present invention further provides a system, where the system includes the communication device described in FIG. 15 or FIG. 16 .

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the methods in FIG. 9 to FIG. 12 are implemented.

Embodiments of the present invention also provide a computer program product containing instructions, which, when the instructions are run on a computer, cause the computer to execute the methods in FIGS. 9 to 12 .

It should be understood that the processor provided in FIG. 15 and FIG. 16 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application-specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The above embodiments of the present invention may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable medium to another computer-readable medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server or data center. (eg coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state drives), and the like.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (37)

1. A method for core network type indication, the method comprising:

a first network node sends a first message to a second network node, wherein the first message is used for indicating core network types supported by the first network node and the second network node;

wherein the first network node is a distributed unit, DU, and the second network node is a central unit, CU; alternatively, the first network node is a CU and the second network node is a DU.

2. The method of claim 1, wherein the first network node comprises only a radio link control layer, a medium access control layer, and a physical layer; the second network node only comprises a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; or,

the first network node only comprises a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer, and the second network node only comprises a radio link control layer, a media access control layer and a physical layer.

3. Method according to claim 1 or 2, wherein the first message comprises public land mobile network, PLMN, information and/or tracking area code, TAC, information of the core network type.

4. The method according to claim 1 or 2, wherein the first message comprises cell barring information for the core network type.

5. The method according to claim 1 or 2, wherein before the first network node sends the first message to the second network node, the method further comprises:

the first network node receiving a second message, the second message being used for determining the core network type;

and the first network node determines the core network type according to the second message.

6. A method for core network type indication, the method comprising:

a second network node receives a first message sent by a first network node, wherein the first message is used for indicating core network types supported by the second network node and the first network node;

wherein the first network node is a distributed unit, DU, and the second network node is a central unit, CU; alternatively, the first network node is a CU and the second network node is a DU.

7. The method of claim 6, wherein the second network node comprises only a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer, and wherein the first network node comprises only a radio link control layer, a medium access control layer and a physical layer; or,

the second network node only comprises a wireless link control layer, a media access control layer and a physical layer, and the first network node only comprises a wireless resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

8. The method according to claim 6 or 7, wherein the first message comprises PLMN information and/or Tracking Area Code (TAC) information of the core network type.

9. The method according to claim 6 or 7, wherein the first message comprises cell barring information for the core network type.

10. A method for core network type indication, the method comprising:

a first network node sends a first message to a second network node, wherein the first message is used for indicating the type of a core network connected with a terminal through a third network node;

wherein the first network node is a concentration unit CU and the second network node is a distribution unit DU.

11. The method according to claim 10, wherein the first network node comprises only a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; the second network node comprises only a radio link control layer, a media access control layer and a physical layer.

12. The method according to claim 10 or 11, characterized in that the method further comprises:

and the first network node receives a second message sent by a third network node, wherein the second message comprises the information of the core network type.

13. The method according to claim 10 or 11, characterized in that the method further comprises:

and the first network node receives a third message sent by the second network node, wherein the third message comprises switching configuration information, and the switching configuration information is generated by the second network node according to the type of a core network connected with the terminal at the third network node.

14. A method for core network type indication, the method comprising:

a second network node receives a first message sent by a first network node, wherein the first message is used for indicating a core network type connected with a terminal at a third network node;

wherein the second network node is a distributed unit, DU, and the first network node is a central unit, CU.

15. The method of claim 14, wherein the second network node comprises only a radio link control layer, a medium access control layer, and a physical layer; the first network node only comprises a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

16. The method according to claim 14 or 15, characterized in that the method further comprises:

the second network node generates switching configuration information according to the type of a core network connected with the terminal at a third network node;

the second network node sends a third message to the first network node, where the third message includes the handover configuration information, so that the first network node sends the handover configuration information to the third network node.

17. A communications apparatus, comprising a processor coupled to a memory, configured to read and execute instructions from the memory to implement:

sending a first message to a second network node, the first message indicating core network types supported by the communication device and the second network node;

wherein the communication means is a distributed unit, DU, and the second network node is a central unit, CU; alternatively, the communication device is a CU and the second network node is a DU.

18. The communications apparatus of claim 17, wherein the communications apparatus comprises only a radio link control layer, a medium access control layer, and a physical layer; the second network node only comprises a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; or,

the communication device only comprises a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer, and the second network node only comprises a radio link control layer, a media access control layer and a physical layer.

19. A communication apparatus according to claim 17 or 18, wherein the first message comprises at least one of core network type public land mobile network, PLMN, information and tracking area code, TAC, information.

20. The communications apparatus according to claim 17 or 18, wherein the first message comprises cell barring information for the core network type.

21. The communications apparatus of claim 17 or 18, wherein the processor is further configured to read and execute instructions from the memory to:

receiving a second message, wherein the second message is used for determining the type of the core network;

and determining the core network type according to the second message.

22. A communication device as claimed in claim 17 or 18, further comprising a memory.

23. A communications apparatus, comprising a processor coupled to a memory and configured to read and execute instructions from the memory to implement:

receiving a first message sent by a first network node, wherein the first message is used for indicating core network types supported by the communication device and the first network node;

wherein the communication means is a distributed unit, DU, and the first network node is a central unit, CU; alternatively, the communication device is a CU and the first network node is a DU.

24. The communications device of claim 23, wherein the communications device comprises only a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer, and wherein the first network node comprises only a radio link control layer, a medium access control layer, and a physical layer; or,

the communication device only comprises a wireless link control layer, a media access control layer and a physical layer, and the first network node only comprises a wireless resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

25. A communication apparatus according to claim 23 or 24, wherein the first message comprises at least one of core network type public land mobile network, PLMN, information and tracking area code, TAC, information.

26. The communications device according to claim 23 or 24, wherein the first message includes cell barring information for the core network type.

27. A communication device as claimed in claim 23 or 24, further comprising a memory.

28. A communications apparatus, comprising a processor coupled to a memory and configured to read and execute instructions from the memory to implement:

sending a first message to a second network node, wherein the first message is used for indicating the type of a core network connected with a terminal at a third network node;

wherein the communication means is a central unit CU and the second network node is a distributed unit DU.

29. The communications apparatus according to claim 28, wherein the communications apparatus comprises only a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; the second network node comprises only a radio link control layer, a media access control layer and a physical layer.

30. The communications apparatus of claim 28 or 29, wherein the processor is further configured to read and execute instructions from the memory to:

and receiving a second message sent by a third network node, wherein the second message comprises the information of the core network type.

31. The communications apparatus of claim 28 or 29, wherein the processor is further configured to read and execute instructions from the memory to:

and receiving a third message sent by the second network node, wherein the third message comprises switching configuration information, and the switching configuration information is generated by the second network node according to the type of a core network connected with the terminal at the third network node.

32. A communication device as claimed in claim 28 or 29, further comprising a memory.

33. A communications apparatus, comprising a processor coupled to a memory and configured to read and execute instructions from the memory to implement:

receiving a first message sent by a first network node, wherein the first message is used for indicating a core network type connected with a terminal at a third network node;

wherein the communication means is a distributed unit DU and the first network node is a central unit CU.

34. The communications apparatus of claim 33, wherein the communications apparatus comprises only a radio link control layer, a medium access control layer, and a physical layer; the first network node only comprises a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

35. The communications apparatus of claim 33 or 34, wherein the processor is further configured to read and execute instructions from the memory to:

generating switching configuration information according to the type of a core network connected with the terminal at a third network node;

sending a third message to the first network node, the third message including the handover configuration information for the first network node to send the handover configuration information to the third network node.

36. A communication device as claimed in claim 33 or 34, further comprising a memory.

37. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method according to any one of claims 1 to 16.

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