WO2020088618A1 - Paging method, apparatus and system, and cu, amf and storage medium - Google Patents

Abstract

Disclosed are a paging method, apparatus and system, and a CU, an AMF and a storage medium, which are used to solve the problem in the prior art of being unable to perform repeated paging in a CU/DU separation mode. The method comprises: a central unit (CU) receiving a first paging message sent by an AMF of a core network, wherein the first paging message carries information of a first discontinuous reception (DRX) cycle of a terminal (UE) to be paged; sending, according to the first paging message, the information of the first DRX cycle of the UE to each distribute unit (DU), so that each DU pages the UE; and if the CU determines that there is a target DU performing second paging, sending a second paging message for the target DU to the target DU, wherein the target DU has not received a paging response for the target DU after a target DRX cycle corresponding to the target DU.

Description

Paging method, device, system, CU, AMF and storage medium

This application requires the priority of the Chinese patent application filed on November 2, 2018 in the Chinese Patent Office with the application number 201811303624.5 and the invention titled "A paging method, device, system, CU, AMF, and storage medium." The entire contents are incorporated by reference in this application.

Technical field

This application mainly relates to the field of communication technology, and in particular, to a paging method, device, system, CU, AMF, and storage medium.

Background technique

In the LTE system, the 4G mobile communication radio network (E-UTRAN) is composed of multiple 4G base stations (eNodeBs), where the eNodeB and the 4G core network (EPC) are connected through an S1 interface, and each eNodeB is connected through an X2 interface. Now when studying 5G systems, consider introducing a central unit (CU, Central Unit) for centralized control and scheduling. The radio resource control (RRC) function of the base station and some layer 2 or / and layer 1 functions are located at this central node. Other functions of the base station are deployed on the distributed unit (DU).

In consideration of power saving, the existing paging mechanism uses the principle of discontinuous reception (DRX) when the terminal (UE) receives the paging message. Each 5G base station (gNB) will notify AMF (access and mobility management function) of its own DRX cycle when establishing an interface with the 5G core network (AMF), and all cells under one gNB use the same DRX cycle. The UE also informs the AMF of its own DRX cycle. The AMF sends the UE-specific DRX cycle to the base station. The base station selects a minimum value between the default DRX cycle supported by the UE and the UE-specific DRX cycle as the paging DRX cycle of the UE. If the AMF does not receive a response from the UE after sending a paging message to gNB, it will continue to send paging messages on the NG interface. The time interval between two pagings needs to consider the paging DRX cycle of the UE. However, in the CU / DU separation mode, a CU may be connected to many DUs, and each DU will be configured with a different DRX cycle. According to the above paging mechanism, the base station can only report its own default DRX cycle, which is not supported by the current specifications. Repeat paging in this split mode.

Therefore, in the CU / DU separation mode, how to repeat paging to effectively page the UE is an urgent problem to be solved.

Summary of the invention

Embodiments of the present application provide a paging method, device, system, CU, AMF, and storage medium, to solve the problem that in the prior art, repeated paging cannot be performed in a CU / DU separated mode.

An embodiment of the present application provides a paging method, which is applied to a CU. The method includes:

The central unit (CU) receives the first paging message sent by the core network AMF, where the first paging message carries the information of the first discontinuous reception (DRX) period of the terminal (UE) to be paged;

Sending information about the first DRX cycle of the UE to each distributed unit (DU) according to the first paging message, so that each DU pages the UE;

If the CU determines that there is a target DU for the second paging, it sends a second paging message for the target DU to the target DU, where the target DU is not after the target DRX cycle corresponding to the target DU A paging response for the target DU is received.

Further, before receiving the first paging message sent by the AMF, the method further includes: receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU; according to the received The information of each second DRX cycle generates a list of DRX cycles for each DU.

Further, the determining that there is a target DU for the second paging includes: for each DU, judging that the DU corresponds to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list Whether the UE's paging response is received after the target DRX cycle duration; if not, determine that the DU is the target DU.

Further, the method further includes: if the CU receives the paging response of the UE, sending first prompt information that at least one DU paging success exists to the AMF, so that the AMF according to the first prompt information, Send a second prompt message to stop paging to other CUs.

Further, the method further includes: receiving second prompt information sent by the AMF to stop paging, and notifying each DU connected to itself to stop paging.

Further, before receiving the first paging message sent by the AMF, the method further includes: receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU; according to the received The information of each second DRX cycle generates a DRX cycle list for each DU; the DRX cycle list is sent to the AMF and saved.

Further, the determining that the target DU for the second paging includes: if a second paging message for the target DU sent by the AMF is received, determining that there is a target DU for the second paging, the second The paging message is sent when the AMF judges that the paging response of the UE is not received after the target DRX cycle duration corresponding to the target DU.

An embodiment of the present application also provides a paging method, which is applied to the AMF. The method includes: the AMF receives information about the first DRX cycle of the UE to be paged, and determines the target CU according to the location information of the UE The target CU sends a first paging message, where the first paging message carries information about the first DRX cycle.

Further, before sending the first paging message to the target CU, the method further includes: receiving and saving the DRX cycle list sent by the CU.

Further, the method further includes: for each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, determine whether to receive after the target DRX cycle duration corresponding to the DU A paging response to the UE; if not, send a second paging message to the CU.

Further, the method further includes: receiving first prompt information sent by the first target CU, the first prompt information is sent when the first target CU determines that there is at least one DU paging success; according to the first A prompt message, sending a second prompt message to stop paging to a second target CU of the target CUs other than the first target CU.

An embodiment of the present application further provides a CU. The CU includes a memory, a processor, and a transceiver:

The processor is configured to receive a first paging message sent by the core network AMF, where the first paging message carries information about the first discontinuous reception DRX cycle of the terminal UE to be paged; according to the first search A call message, sending the information of the first DRX cycle of the UE to each distributed unit DU, so that each DU pages the UE; if it is determined that there is a target DU for the second paging, the Sending a second paging message of the target DU to the target DU, where the target DU is that no paging response for the target DU is received after the target DRX cycle corresponding to the target DU;

The transceiver is configured to receive the first paging message sent by the core network AMF under the control of the processor, and send the first DRX cycle information of the UE to each distributed unit DU.

Further, the processor is configured to receive the second DRX cycle information supported by each DU sent by each DU; generate a DRX cycle list for each DU according to the received information of each second DRX cycle .

Further, the processor is configured to determine, for each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, whether the target DRX cycle duration corresponding to the DU is after The paging response of the UE is received; if not, the DU is determined to be the target DU.

Further, the processor is configured to, if the paging response of the UE is received, send first prompt information that at least one DU paging success exists to the AMF, so that the AMF according to the first prompt information, Send a second prompt message to stop paging to other CUs.

Further, the processor is configured to receive information about the second DRX cycle supported by each DU sent by each DU connected to the CU; according to the received information about each second DRX cycle, generate a message for each A list of DRX cycles for each DU; send the DRX cycle list to AMF and save it.

Further, the processor is configured to, if a second paging message for the target DU sent by the AMF is received, determine that there is a target DU for the second paging, and the second paging message is the AMF It is judged to be sent when the paging response of the UE is not received after the target DRX cycle duration corresponding to the target DU.

Further, the processor is configured to receive the second prompt message sent by the AMF to stop paging, and notify each DU connected to itself to stop paging.

An embodiment of the present application further provides an AMF. The AMF includes a memory, a processor, and a transceiver:

The processor is configured to receive the first DRX cycle information of the UE to be paged, determine the target CU according to the location information of the UE; send a first paging message to the target CU, and the first search The paging message carries the information of the first DRX cycle; the transceiver is configured to receive the information of the first DRX cycle of the UE to be paged, and send the first paging message to the target CU.

Further, the processor is configured to receive and save the DRX cycle list sent by the CU.

Further, the processor is configured to determine, for each DU, whether the target DRX cycle duration corresponding to the DU is after the duration of the target DRX cycle according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list Receiving a paging response from the UE; if not, sending a second paging message to the CU.

Further, the processor is configured to receive first prompt information sent by the first target CU, and the first prompt information is sent when the first target CU determines that there is at least one DU paging success; according to the The first prompt information sends second prompt information for stopping paging to a second target CU of the target CUs other than the first target CU.

An embodiment of the present application provides a paging device, which is applied to a CU, and the device includes:

A first receiving module, configured to receive a first paging message sent by the core network AMF, where the first paging message carries information about the first DRX cycle of the UE to be paged;

A first sending module, configured to send the first DRX cycle information of the UE to each DU according to the first paging message, so that each DU pages the UE;

The determining module is configured to send a second paging message for the target DU to the target DU if it is determined that there is a target DU for the second paging, where the target DU is the target corresponding to the target DU After the DRX cycle, no paging response for the target DU is received.

An embodiment of the present application provides a paging device, which is applied to AMF. The device includes:

The second receiving module is used to receive the first DRX cycle information of the UE to be paged, and determine the target CU according to the location information of the UE; the second sending module is used to send the first paging to the target CU Message, the first paging message carries information about the first DRX cycle.

An embodiment of the present application further provides a computer-readable storage medium that stores a computer program executable by a CU, and when the program runs on the CU, causes the CU to execute any of the above-mentioned applications applied to the CU Describe the steps of the method.

An embodiment of the present application further provides a computer-readable storage medium that stores a computer program executable by the AMF, and when the program runs on the AMF, the AMF executes any of the above-mentioned applications applied to the AMF. Describe the steps of the method.

An embodiment of the present application provides a paging system, which includes a paging device applied to a central unit CU and a paging device applied to a core network AMF.

Embodiments of the present application provide a paging method, device, system, CU, AMF, and storage medium. The method includes: a central unit (CU) receives a first paging message sent by a core network AMF, and the first search The paging message carries the information of the first discontinuous reception (DRX) period of the terminal (UE) to be paged; according to the first paging message, the information of the first DRX period of the UE is sent to each distributed Unit DU, causing each DU to page the UE; if the CU determines that there is a target DU for the second paging, sends a second paging message for the target DU to the target DU, wherein the The target DU is that no paging response for the target DU is received after the target DRX cycle corresponding to the target DU. In this method, the CU sends the first DRX cycle of the UE to each DU, so that each DU determines the target DRX cycle according to its own second DRX and the first DRX cycle, so as to perform paging, if it is determined according to the target DRX cycle There is a target CU for the second paging, so it is determined that the paging is initiated again, in the CU / DU separation mode, the DRX cycle of paging is determined, and repeated paging to the UE is used to ensure that the UE can be successfully paged .

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

1 (A) is a schematic diagram of a deployment structure 1 of a 5G wireless access network side provided by an embodiment of this application;

1 (B) is a schematic diagram of a 5G wireless access network side deployment structure 2 provided by an embodiment of the present application;

2 (A) is a schematic diagram of a 5G LTE control plane protocol stack provided by an embodiment of this application;

2 (B) is a schematic diagram of a 5G LTE user plane protocol stack provided by an embodiment of this application;

FIG. 3 is a schematic diagram of eight RAN / CU DU separation modes provided by an embodiment of the present application;

4 is a schematic process diagram of a paging method according to Embodiment 1 of the present application;

5 is a schematic diagram of a specific process of a paging method provided in Embodiment 3 of the present application;

6 is a schematic process diagram of a paging method according to Embodiment 5 of the present application;

7 is a schematic diagram of a specific process of a paging method according to Embodiment 7 of the present application;

8 is a schematic structural diagram of a CU according to Embodiment 8 of the present application;

9 is a schematic structural diagram of an AMF provided in Example 8 of this application;

10 is a schematic structural diagram of a paging device according to Embodiment 10 of the present application;

11 is a schematic structural diagram of a paging device according to Embodiment 11 of the present application;

12 is a schematic structural diagram of a paging system provided by an embodiment of the present application.

detailed description

The present application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of this application.

At the current stage of 5G research, the possible deployments of 5G networks on the radio access network (RAN) side include:

Deployment structure 1:

Figure 1 (A) is a typical LTE architecture. There are multiple cells under the eNB. The eNB and the EPC are connected through the S1 interface, and the eNBs are connected through the X2 interface. In the connected state, the UE and the cell transmit and receive air interface data , Where multiple cells use the same DRX cycle.

Deployment structure 2:

As shown in FIG. 1 (B), the node on the network side, that is, the base station is divided into CU and DU, and the node on the user side is UE, and one CU can be connected to multiple DUs. The interface (NG) between the base station and the core network is suspended in the CU, and the interface (Xn) between the base stations is also suspended in the CU.

Considering that interface control signaling requires high reliability, the control plane transport layer uses the Stream Control Transmission Protocol (SCTP). The specific 5G LTE control plane protocol stack is shown in Figure 2 (A). The user plane mainly considers the protocol specifications defined within 3GPP and the compatibility with the original system, and uses the GPRS tunnel protocol (GTP-U). The specific 5G LTE user plane protocol stack is shown in FIG. 2 (B).

For the mode of CU / DU separation in deployment architecture 2, the way of CU / DU separation on the RAN side needs to be considered. Currently, eight possibilities are proposed at the research stage, as shown in FIG. 3.

Method 1: The radio resource control layer (Radio Resource Control, RRC) is in the CU, the packet data convergence layer (Packet Data Convergence Protocol, PDCP), the radio link control layer (Radio Link Control, RLC), and the media access control layer (Media Access (Control, MAC) and physical layer, radio frequency signal control layer (Radio Frequency, RF) in DU;

Method 2: RRC, PDCP in CU, RLC, MAC and physical layer, RF in DU;

Method 3: RRC, PDCP, RLC high layer is in CU, RLC bottom layer, MAC and physical layer, RF is in DU;

Mode 4: RRC, PDCP, RLC in CU, MAC and physical layer, RF in DU;

Mode 5: RRC, PDCP, RLC, MAC high layer is in CU, MAC bottom layer and physical layer, RF is in DU;

Mode 6: RRC, PDCP, RLC, MAC in CU, physical layer, RF in DU;

Mode 7: RRC, PDCP, RLC, MAC and part of the physical layer are in CU, the bottom layer of physical layer and RF are in DU;

Method 8: RRC, PDCP, RLC, MAC and physical layer are in CU, and RF is in DU.

Method 3 is a standardized method decided to be adopted after discussion.

However, in the CU / DU separation mode, the existing paging mechanism can no longer satisfy the paging in this mode. In the existing paging mechanism, each gNB will notify the AMF of its own DRX cycle when establishing an interface with the AMF. All cells under a gNB use the same DRX cycle. The UE also informs the AMF of its own DRX cycle. The AMF sends the UE-specific DRX cycle to the base station. The base station selects a minimum value between the default DRX cycle supported by the UE and the UE-specific DRX cycle as the target paging DRX cycle of the UE. However, in the CU / DU separation mode, a CU may be connected to many DUs, each DU will be configured with a different DRX cycle, according to the above paging mechanism, the base station can only report one of its default DRX cycle, so the current specification is Cannot support paging in this split mode. In response to this technical problem, this application proposes the following solutions.

FIG. 4 is a schematic process diagram of a paging method according to an embodiment of the present application. The process includes the following steps:

S401: The CU receives a first paging message sent by the AMF, where the first paging message carries information about the first DRX cycle of the UE to be paged.

The method provided in the embodiment of the present application is applied to a CU. In a 5G network deployment structure, the network side is divided into CU and DU. In order to ensure the availability of the UE, the UE needs to initiate a registration process to the AMF. Specifically, during the registration process, the UE sends its own specific DXR to the AMF through Non-Access Stratum (NAS) signaling, and enters after the registration is completed. Idle state, waiting for AMF paging.

When the AMF needs to page a certain UE, the target CU for paging will be determined according to the location information of the UE. The target CU may be one or more. After determining the target CU, the AMF sends a first paging message to the target CU. Since this is the first paging, the target CU is required to control each DU to which it is connected to perform this paging. In order to enable the DU to successfully initiate paging to the UE, the first paging message carries information about the first DRX cycle of the UE to be paged.

The CU receives the first paging message and performs corresponding operations according to the first paging message.

S402: Send the first DRX cycle information of the UE to each DU according to the first paging message, so that each DU pages the UE.

Since the first paging message carries the information of the first DRX cycle of the UE, after receiving the first paging message, the CU sends the information of the first DRX cycle to each DU connected to itself.

After receiving the information of the first DRX cycle, the DU determines the target DRX cycle that is finally used to page the UE according to the first DRX cycle and its own second DRX cycle. Specifically, like the existing paging mechanism, the DU selects a minimum value as the target DRX cycle for paging the UE in the second DRX cycle supported by itself and the first DRX cycle of the UE, and uses the target DRX cycle to target the UE Perform paging.

S403: If the CU determines that there is a target DU for the second paging, send a second paging message for the target DU to the target DU, where the target DU is a target DRX cycle corresponding to the target DU The DU that did not receive the paging response to the target DU afterwards.

If the paging response for the UE of the DU is not received after the target DRX cycle corresponding to a certain DU, it is considered that the first initiated paging fails, and at this time, the second paging needs to be initiated.

If the CU determines that there is a target DU that needs to be paged a second time, it sends a second paging message to the target DU. The target DU is determined when no paging response for the target DU is received after the target DRX cycle corresponding to the target DU, and thus the target DU performs the second paging of the UE according to the second paging message.

In the embodiment of the present application, the CU sends the first DRX cycle information of the UE to each DU, so that each DU determines the target DRX cycle according to its second DRX cycle and the first DRX cycle, so as to perform paging if According to the target DRX cycle, it is determined that there is a target CU for the second paging, so as to determine that the paging is initiated again, in the CU / DU separation mode, the DRX cycle of paging is determined, and repeated paging to the UE to ensure The UE can be successfully paged.

In order to ensure that the CU can determine the target DU that needs to be paged for the second time, based on the foregoing embodiment, in the embodiment of the present application, before receiving the first paging message sent by the AMF, the method further includes: Receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU; generating a list of DRX cycles for each DU according to the received information about each second DRX cycle.

In the CU / DU separation mode, each CU may be connected to multiple DUs, and each DU will be configured with a different DRX cycle. In order to ensure that the target DRX cycle for paging can be determined in this mode, the CU will itself The included DRX cycles supported by each DU are stored in the form of a list.

Each DU sends the information of the second DRX cycle it supports to the CU connected to it, and the CU receives the information of each second DRX cycle, and generates the DRX for each DU according to the information of each second DRX cycle List of cycles. Specifically, the information of each second DRX cycle carries the second DRX cycle of each DU, and in order to identify to which DU each second DRX cycle belongs, the information also carries the identification information of the DU, The identification information may be the unique serial number, IP address, etc. of the DU. According to the identification information of each DU, the CU stores the second DRX cycle of the DU corresponding to the identification information in a one-to-one correspondence with the DU of the identification information, and generates a DRX cycle list for each DU and saves it locally.

Based on the foregoing embodiments, in the embodiments of the present application, the determining that there is a target DU for performing the second paging includes: for each DU, according to the second DRX of the DU stored in the DRX cycle list Cycle and the first DRX cycle, determine whether the paging response of the UE is received after the duration of the target DRX cycle corresponding to the DU; if not, determine that the DU is the target DU.

The CU generates a list of DRX cycles for each DU based on the received information of each second DRX cycle and saves them locally. After receiving the first paging message, all DUs controlling their own connection initiate the first paging. In order to ensure that the paging to the UE can be successful this time, it is necessary to monitor whether the paging response of the UE is received after the first paging is initiated. If it is received, it is considered that the first paging has been successful, if not It is considered that the first paging fails, and the second paging needs to be initiated.

For each DU, according to the locally stored DRX cycle list, determine the target DRX cycle of the DU, and determine whether the first paging is successful. In order to facilitate whether the CU pages to the UE successfully, in the embodiment of the present application, if the page to the UE is successful, the UE sends a paging response to the CU. Specifically, for each DU, the CU may determine the target DRX cycle corresponding to the DU according to the acquired second DRX cycle of the DU and the first DRX cycle of the UE, and determine whether to receive the target DRX cycle after the end of the target DRX cycle If there is no paging response to the UE, if the first paging of the DU fails, the DU is determined as the target DU. The target DU needs to be instructed to initiate a second paging to ensure that the UE can be paged success.

In the embodiment of the present application, the CU determines the target DRX cycle corresponding to the DU according to the second DRX cycle of the DU and the first DRX cycle of the UE in the DRX cycle list, and determines the target DRX cycle according to the target DRX cycle After receiving the paging response of the UE, it is determined whether the DU is the target DU for the second paging, and then the paging of the UE can be completed in the CU / DU separated mode.

In order to ensure that the paging for the UE can be stopped immediately after paging to the other CU to avoid wasting network resources, on the basis of the foregoing embodiments, in the embodiments of the present application, the method further includes: If the CU receives the paging response from the UE, the first prompt message indicating that at least one DU paging succeeded is sent to the AMF, so that the AMF sends the first page to stop paging to other CUs according to the first prompt message Two prompt information.

When paging a UE, AMF may determine multiple target CUs based on the location information of the UE to ensure that the UE can be paged quickly and successfully. Therefore, after the target CU controls the DU to initiate paging to the UE, if a target CU receives the paging response from the UE, it is considered that at least one DU included in the CU has been successfully paged. In this case, in order to avoid repeated paging and The waste of network resources requires the target CU to send the first prompt message to the AMF to notify the AMF that it has successfully paged the UE. In order for the AMF to determine which target CU has successfully paged, the first prompt information may include identification information of the target CU. Specifically, the identification information may be the IP address of the CU.

After receiving the first prompt message, the AMF can determine that the paging to the UE has been successful this time. In order to avoid waste of network resources and repeated paging, at this time, the target CU needs to be sent to other target CUs. Send a second prompt message to stop paging, so that other target CUs stop paging to the UE this time.

In order to reduce the waste of network resources, on the basis of the foregoing embodiments, in the embodiments of the present application, the method further includes: receiving second prompt information for stopping paging sent by the AMF, and notifying each DU connected to itself Stop paging.

When the CU receives the second prompt message sent by the AMF, it indicates that other CUs have successfully paged the UE. To avoid waste of network resources and repeated paging, the CU notifies each DU connected to itself to stop immediately. For the paging of the UE.

The following describes the above embodiments in detail with a specific embodiment. As shown in FIG. 5, the following steps are included:

In the CU / DU separation mode, one CU is connected to two DUs, the second DRX cycle length of DU1 is 64ms, and the second DRX cycle length of DU2 is 128ms.

Steps 1 to 3: When the base station is connected to the network, both DU1 and DU2 report the second DRX cycle they support to the CU. The CU generates a second DRX cycle containing each DU and the corresponding DU according to the second DRX cycle of each DU List and save the DRX cycle of DRX cycle. The base station does not need to carry the default DRX during the establishment of the interface with the AMF.

Step 4: The UE initiates a registration request to the network side. During the registration process, the UE notifies AMF of its first DRX cycle through NAS signaling.

Step 5 The UE enters the idle state after registration.

Steps 6-7: AMF initiates paging to the UE. The target CU is determined according to the location information of the UE, and a first paging message is sent to the target CU, where the first paging message carries the first DRX cycle of the UE.

Steps 8a and 8b: after receiving the first paging message, the target CU sends the first DRX cycle of the UE to each DU connected thereto.

Steps 9a and 9b: Both DU1 and DU2 receive the first DRX cycle of the UE, select the minimum value between the first DRX cycle and its own second DRX cycle, and determine the minimum value as the target DRX cycle for the UE, according to The target DRX cycle initiates paging to the UE.

Specifically, the target DRX cycle of DU1 should be no more than 64, and the target DRX cycle of DU2 should be no more than 128.

Step 10-11: The CU determines that the DU1 paging with the second DRX cycle of 64 has been completed according to the DRX cycle list saved by itself, but has not received the response message from the UE. At this time, the DU1 is determined to be the target DU and sent to the DU1 The second paging message carries the first DRX cycle of the UE, and the DU1 initiates the second paging.

Steps 12 (a, b) -13 (a, b): The CU determines that the second paging of DU1 with the second DRX cycle of 64 has been completed according to the DRX cycle list saved by itself, because the second DRX cycle of DU2 is 128, which is the time when DU1 can complete two pagings, so the first paging of DU2 with the second DRX cycle of 128 has also been completed, but no paging response from the UE has been received, and the CU sends a second paging The message is sent to DU2 and DU1, and DU2 and DU1 initiate the third paging at the same time.

Step 14: The CU receives the paging response from the UE, and sends to the AMF the first prompt message that at least one DU has successfully paged.

Step 15: The AMF receives the first paging message, and sends a second prompt message to stop paging to other CUs, so that the other CUs stop sending paging messages.

Among them, this method does not need to report its DRX cycle to the AMF to the CU, but for the existing specifications, the DRX cycle is a value that must be provided to the AMF, and the DRX will be carried when the CU sends a paging message to the AMF Cycle, and in this embodiment of the present application, the CU does not need to send its own DRX cycle to the AMF. Therefore, when the paging message sent by the CU to the AMF in this embodiment of the present application does not need to carry the DRX cycle, the original paging message is then It will change, that is, the Default Paging DRX cycle changes from M to O, as shown in Table 1.

Table 1

In the embodiment of the present application, the CU sends the first prompt message that there is at least one DU that has been successfully paged to the AMF, so that the AMF controls the other CUs to stop paging, which avoids waste of resources and repeated paging.

In order to enable the AMF to determine the target DU when the second paging is required, on the basis of the foregoing embodiments, in the embodiments of the present application, before receiving the first paging message sent by the AMF, the The method further includes: receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU; and generating a DRX cycle list for each DU according to the received information about each second DRX cycle ; Send the DRX cycle list to AMF and save it.

In the CU / DU separation mode, each CU may be connected to multiple DUs, and each DU will be configured with a different DRX cycle. In order to ensure that the target DRX cycle for paging can be determined in this mode, the CU will itself The DRX cycles supported by each connected DU are sent to AMF in the form of a list.

In order for the CU to obtain the second DRX cycle of each DU connected to it, each DU sends the information of the second DRX cycle it supports to the CU connected to it, and the CU receives the information of each second DRX cycle according to The information of each second DRX cycle generates a list of DRX cycles for each DU. Specifically, the information of each second DRX cycle carries the second DRX cycle of each DU, and in order to identify to which DU each second DRX cycle belongs, the information also carries the identification information of the DU, For example, the identification information may be a unique serial number of the DU, an IP address, and so on. Based on the identification information of each DU, the CU stores the second DRX cycle of the DU corresponding to the identification information in a one-to-one correspondence with the DU of the identification information, generates a DRX cycle list for each DU, and sends the DRX cycle list to AMF, so that the AMF can determine the target DU when the second paging is needed according to the DRX cycle list.

In the embodiment of the present application, the self-supported DRX cycle list formed by itself is sent to the AMF through the CU, so that the AMF can determine the target DU when the second paging is needed, and then can be in the CU / DU separated mode Complete paging to the UE.

Based on the foregoing embodiments, in the embodiment of the present application, the determining that the target DU for the second paging includes: if a second paging message for the target DU sent by the AMF is received, determining the presence A target DU performing a second paging, the second paging message is sent by the AMF when it determines that the UE does not receive the paging response after the target DRX cycle duration corresponding to the target DU.

After the CU sends the list of DRX cycles it supports to the AMF, the AMF determines the target CU that needs to perform the second paging. When the AMF judges that it has not received the paging response of the UE after the target DRX cycle duration corresponding to a certain DU, it determines the DU as the target DU, and then sends a second paging message to the CU, so that the CU can know that it should control Which DU performs the second paging, in addition to the second DRX cycle of the target DU, the second paging message also includes the identification information of the target DU, specifically, the identification information of the target DU may be the target DRX cycle of DU.

When the CU receives the second paging message, it determines the target DU according to the identification information of the target DU contained in the second paging message, sends the second paging message to the target DU, and causes the target DU to initiate The UE's second paging.

In the embodiment of the present application, the CU receives the second paging message sent by the AMF to reach the target DU that determines that there is a second paging.

FIG. 6 is a schematic process diagram of a paging method according to an embodiment of the present application. The process includes the following steps:

S601: The AMF receives the information of the first DRX cycle of the UE to be paged, and determines the target CU according to the location information of the UE.

The method provided in the embodiment of the present application is applied to AMF. When the UE needs to register to the network, it sends its specific first DRX cycle information to the AMF through NAS signaling. After the registration is completed, it enters the idle state and waits for the AMF to page.

After receiving the first DRX cycle information of the UE to be paged, the AMF can determine the location of the UE, determine the CU covering the location area based on the location information, and use the CU as the target CU, specifically possible One or more target CUs are determined to ensure that the UE can be paged quickly and successfully.

S602: Send a first paging message to the target CU, where the first paging message carries information about the first DRX cycle.

When the AMF needs to initiate paging to the UE, it first sends the first paging message to the target CU corresponding to the UE. Since this is the first paging, this paging requires the target CU to control all DUs connected to it by itself. call. In order to enable the DU to successfully initiate paging to the UE, the first paging message carries the UE's first DRX cycle, so that the DU can determine the target according to the first DRX cycle and the DU's second DRX cycle DRX cycle, so as to realize paging to the UE.

In the embodiment of the present application, the first page message is sent to the CU to control the CU to initiate paging to the UE, which achieves the effective paging of the UE in the CU / DU separation mode.

In order to determine whether it is necessary to initiate a second paging, on the basis of the foregoing embodiments, in the embodiments of the present application, before sending the first paging message to the target CU, the method further includes: receiving List and save the DRX cycle sent by CU.

And in order to determine the target DU for the second paging, on the basis of the foregoing embodiments, the method further includes: for each DU, according to the second DRX cycle of the DU stored in the DRX cycle list and In the first DRX cycle, determine whether the paging response of the UE is received after the target DRX cycle duration corresponding to the DU; if not, send a second paging message to the CU.

When the AMF receives the DRX cycle list sent by the CU and supports it, it receives the DRX cycle list and saves it.

In order to facilitate the AMF to determine whether the paging to the UE is successful, in the embodiment of the present application, if the paging to the UE is successful, the UE sends a paging response to the AMF. After initiating the first paging, AMF monitors whether the paging response of the UE is received. If it is received, it is considered that the first paging has been successful. Secondary paging.

For each DU, according to the locally stored DRX cycle list, determine the target DRX cycle of the DU, and determine whether the first paging is successful. Specifically, the AMF determines the target DRX cycle corresponding to the DU according to the acquired second DRX cycle of the DU and the first DRX cycle of the UE for each DU, and determines whether the target DRX cycle is received after the end of the target DRX cycle If there is no paging response from the UE, if the first paging of the DU fails, the DU is determined as the target DU. The target DU needs to be instructed to initiate a second paging to ensure that the UE can be paged success.

In the embodiment of the present application, the AMF determines the target DRX cycle corresponding to the DU according to the second DRX cycle of the DU and the first DRX cycle of the UE in the DRX cycle list, and determines after the target DRX cycle according to the target DRX cycle Whether the paging response of the UE is received to determine whether the DU is the target DU for the second paging, and then the paging of the UE can be completed in the CU / DU separated mode.

In order to avoid the waste of network resources and the occurrence of repeated paging, on the basis of the foregoing embodiments, in the embodiments of the present application, the method further includes: receiving the first prompt information sent by the first target CU, the The first prompt message is sent when the first target CU determines that there is at least one DU paging success; according to the first prompt message, a second target other than the first target CU in the target CU The CU sends a second prompt message to stop paging.

When paging a UE, AMF may determine multiple target CUs based on the location information of the UE to ensure that the UE can be paged quickly and successfully. In order to avoid the duplication of paging and the waste of network resources, if the first target CU of the target CU determines that there is at least one DU connected to itself, the first target CU sends a first prompt message to the AMF to notify AMF successfully pages the UE. In order for the AMF to determine which target CU has successfully paged, the first prompt information may include identification information of the first target CU, specifically, the identification information may be the IP address of the first target CU, and so on.

After receiving the first prompt message, the AMF may determine that the paging to the UE has been successful this time, and determine which target CU has completed paging according to the identification information of the first target CU in the first prompt message. The second target CU other than the first target CU sends a second prompt message, so that the other second target CU stops paging to the UE to avoid waste of network resources and repeated paging.

In the embodiment of the present application, the first prompt message sent by the CU is received to determine which target CU has completed paging, and the second prompt message is sent to other target CU to stop paging, thereby avoiding waste of network resources And repeated paging.

The following describes the above embodiments in detail with a specific embodiment. As shown in FIG. 7, in the CU / DU separated mode, one CU is connected to two DUs, the second DRX cycle of DU1 is 64ms, and the second of DU2 The DRX cycle is 128ms. As shown in Figure 7, the process includes:

Steps 1a, 1b, 1c: When the base station is connected to the network, both DU1 and DU2 report the second DRX cycle they support to the CU, and the CU generates each DU and the corresponding DU according to the second DRX cycle of each DU The DRX cycle list (list) of the second DRX cycle and report the DRX cycle list that it supports to the AMF.

Step 2: The UE initiates a registration request to the network side. During the registration process, the UE notifies AMF of its specific first DRX cycle through NAS signaling. After the registration is completed, the UE enters the idle state and waits for the paging of the AMF.

Step 3: AMF initiates paging to the UE. Determine the target CU according to the location information of the UE, and send a first paging message to the target CU, since this is the first paging, the first paging message carries the second DRX cycle of all DUs that need to be paged, and The first DRX cycle of the UE.

Steps 4a and 4b: after receiving the first paging message, the target CU sends the first DRX cycle of the UE to each DU connected thereto.

Steps 5a and 5b: Both DU1 and DU2 receive the first DRX cycle of the UE, select the minimum value between the first DRX cycle and its own second DRX cycle, and determine the minimum value as the target DRX cycle for the UE, according to The target DRX cycle initiates paging to the UE.

Specifically, the target DRX cycle of DU1 should be no more than 64, and the target DRX cycle of DU2 should be no more than 128.

Step 6: The AMF determines that the DU1 paging with the second DRX cycle of 64 has been completed according to the DRX cycle list saved by itself, but has not received the response message from the UE. At this time, it initiates the second paging for the DU1. The second paging message is sent to the CU, and the second paging message includes only the second DRX cycle of 64.

Steps 7a and 7b: the CU determines that DU1 with the second DRX cycle of 64 is the target DU according to the second paging message, sends the second paging message to DU1, and DU1 initiates the second paging.

Step 8: The AMF determines that the second paging of DU1 with the second DRX cycle of 64 has been completed according to the DRX cycle list saved by itself. Since the second DRX cycle of DU2 is 128, it is the time for DU1 to complete two pagings Therefore, at this time, the first paging of DU2 with the second DRX cycle of 128 has also been completed, but still has not received the response message from the UE. At this time, a third paging message is sent to the CU. Contains the second DRX cycle of 64 and 128.

Steps 9a, 9b, 10a, and 10b: the CU determines DU1 and DU2 with the second DRX cycle of 64 and 128 as the target DU according to the third paging message, and sends the third paging message to DU1 and DU2. DU2 initiates paging.

Among them, in CU / DU separation mode, CU sends paging message to AMF as shown in Table 1. Since the existing specification is that the base station sends one DRX cycle of itself to the AMF, and in this solution, multiple DUs are connected under the CU, each DU is configured with a different DRX cycle. At this time, when the CU sends a paging message to the AMF, It carries multiple DRX cycles, that is, the DRX cycle list generated by itself, so the modification of the existing specification is to modify the Default Paging DRX cycle to the Default Paging DRX cycle list.

Table 2

In addition, in the CU / DU separation mode, the paging message sent by the AMF to the CU is shown in Table 3. When the first paging is initiated by the AMF, it will carry the DRX cycle list of all the DUs paging, that is, the DRX cycle list, and then For each paging, the AMF will determine the target DU according to the saved DRX cycle list. At this time, when the paging message is sent again, only the DRX cycle of the target DU needs to be carried. In the existing specification, the base station has only one DRX cycle, and does not have this step. Therefore, the modification of the existing specification is that a DRX cycle list for the target DU is added to the paging message page sent by the AMF to the CU.

table 3

8 is a CU provided by an embodiment of the present application, the CU includes: a memory, a processor, and a transceiver;

The processor is used to read the program in the memory and perform the following process:

Receiving a first paging message sent by the core network AMF, where the first paging message carries information about the first DRX cycle of the UE to be paged;

Send information about the first DRX cycle of the UE to each DU according to the first paging message, so that each DU pages the UE;

If it is determined that there is a target DU for the second paging, send a second paging message for the target DU to the target DU, where the target DU is not received after the target DRX cycle corresponding to the target DU To a paging response to the target DU;

The transceiver is configured to receive the first paging message sent by the core network AMF under the control of the processor, and send the first DRX cycle information of the UE to each DU.

The processor is configured to receive information about the second DRX cycle supported by each DU sent by each DU connected to the CU; and generate information for each DU according to the received information about each second DRX cycle List of DRX cycles.

The processor is configured to determine, for each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, whether the target DRX cycle duration corresponding to the DU is received Describe the paging response of the UE; if not, determine the DU as the target DU.

The processor is configured to: if the paging response of the UE is received, send the first prompt information that at least one DU paging succeeds to the AMF, so that the AMF sends the other prompt information to other CUs according to the first prompt information Send a second prompt message to stop paging.

The processor is configured to receive the second prompt message sent by the AMF to stop paging, and notify each DU connected to itself to stop paging.

The processor is configured to receive information about the second DRX cycle supported by each DU sent by each DU connected to the CU; and generate information for each DU according to the received information about each second DRX cycle DRX cycle list; send the DRX cycle list to AMF and save it.

The processor is configured to determine, if the second paging message for the target DU sent by the AMF is received, that there is a target DU for the second paging, and the second paging message is determined by the AMF to Sent when the target DRX cycle corresponding to the target DU does not receive the paging response of the UE.

9 is an AMF provided by an embodiment of the present application, the AMF includes: a memory, a processor, and a transceiver;

The processor is used to read the program in the memory and perform the following process:

Used to receive the information of the first DRX cycle of the UE to be paged, determine the target CU according to the location information of the UE; send a first paging message to the target CU, the first paging message carrying the Describe the information of the first DRX cycle;

The transceiver is configured to receive information about the first DRX cycle of the UE to be paged, and send a first paging message to the target CU.

The processor is configured to receive and save the DRX cycle list sent by the CU.

The processor is configured to determine, for each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, whether the target DRX cycle duration corresponding to the DU is received Describe the paging response of the UE; if not, send a second paging message to the CU.

The processor is configured to receive first prompt information sent by a first target CU, the first prompt information is sent when the first target CU determines that there is at least one DU paging success; according to the first prompt Information, sending second prompt information to stop paging to a second target CU of the target CUs other than the first target CU.

Based on the same technical concept, the embodiments of the present application provide a paging device, which is applied to a CU. The device provided by the embodiment of the present application is shown in FIG. 10, and the device includes:

The first receiving module 1001 is configured to receive a first paging message sent by the core network AMF, where the first paging message carries information about the first discontinuous reception DRX cycle of the terminal UE to be paged;

The first sending module 1002 is configured to send the information of the first DRX cycle of the UE to each distributed unit DU according to the first paging message, so that each DU pages the UE;

The determining module 1003 is configured to send a second paging message for the target DU to the target DU if it is determined that there is a target DU for the second paging, where the target DU corresponds to the target DU After the target DRX cycle, no paging response for the target DU is received.

Further, the first receiving module 1001 is further configured to receive the information of the second DRX cycle supported by each DU sent by each DU connected to the CU; generate according to the received information of each second DRX cycle List of DRX cycles for each DU.

Further, the determination module 1003 is specifically configured to determine, for each DU, whether the target DRX cycle duration corresponding to the DU is after the duration of the target DRX cycle according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list The paging response of the UE is received; if not, the DU is determined to be the target DU.

Further, the first sending module 1002 is further configured to send the first prompt information that at least one DU paging success exists to the AMF if the CU receives the paging response of the UE, so that the AMF can respond to the first The prompt information sends the second prompt information to stop paging to other CUs.

Further, the first receiving module 1001 is further configured to receive the second prompt message sent by the AMF to stop paging, and notify each DU connected to itself to stop paging.

Further, the first receiving module 1001 is further configured to receive the information of the second DRX cycle supported by each DU sent by each DU connected to the CU; generate according to the received information of each second DRX cycle The DRX cycle list for each DU; the first sending module 1002 is also used to send the DRX cycle list to the AMF and save it.

Further, the determining module 1003 is specifically configured to determine that there is a target DU for the second paging if the second paging message sent by the AMF for the target DU is received, and the second paging message is the AMF It is judged to be sent when the paging response of the UE is not received after the target DRX cycle duration corresponding to the target DU.

Based on the same technical concept, the embodiments of the present application provide a paging device, which is applied to AMF. The device provided by the embodiment of the present application is shown in FIG. 11, and the device includes:

The second receiving module 1101 is configured to receive information about the first DRX cycle of the UE to be paged, and determine the target CU according to the location information of the UE;

The second sending module 1102 is configured to send a first paging message to the target CU, where the first paging message carries information about the first DRX cycle.

Further, the second receiving module 1101 is also used to receive and save the DRX cycle list sent by the CU.

Further, the second sending module 1102 is further configured to determine, for each DU, the target DRX cycle duration corresponding to the DU according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list Whether a paging response of the UE is received; if not, send a second paging message to the CU.

Further, the second receiving module 1101 is further configured to receive first prompt information sent by the first target CU, where the first prompt information is sent when the first target CU determines that there is at least one DU paging success; The second sending module 1102 is further configured to send second prompt information for stopping paging to a second target CU of the target CUs other than the first target CU according to the first prompt information.

FIG. 12 is a schematic structural diagram of a paging system provided by an embodiment of the present application. The paging includes a CU 1201 and a core network AMF 1202. among them:

The CU1201 is configured to receive a first paging message sent by the core network AMF, where the first paging message carries information about the first DRX cycle of the UE to be paged; according to the first paging message, the The information of the first DRX cycle of the UE is sent to each distributed unit DU, so that each DU pages the UE; if it is determined that there is a target DU for the second paging, the first Two paging messages are sent to the target DU, where the target DU is that no paging response for the target DU is received after the target DRX cycle corresponding to the target DU.

The core network AMF1202 is configured to receive the first DRX cycle information of the UE to be paged, determine the target CU according to the location information of the UE, and send a first paging message to the target CU, the first The paging message carries the information of the first DRX cycle.

In order to solve the problem in the prior art that repeated paging cannot be performed in the CU / DU separated mode, embodiments of the present application provide a paging system.

The CU is configured to receive information about the second DRX cycle supported by each DU sent by each DU connected to the CU; generate DRX for each DU according to the received information about each second DRX cycle List of cycles.

The CU is configured to determine, for each DU, whether the target DRX cycle duration corresponding to the DU is received after receiving the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list The UE's paging response; if not, determine the DU as the target DU.

The CU is configured to, if receiving a paging response from the UE, send first prompt information that at least one DU paging success exists to the AMF, so that the AMF sends to other CUs according to the first prompt information The second prompt message to stop paging.

The CU is configured to receive the second prompt message sent by the AMF to stop paging, and notify each DU connected to itself to stop paging.

The CU is configured to receive information about the second DRX cycle supported by each DU sent by each DU connected to the CU; generate DRX for each DU according to the received information about each second DRX cycle Period list; send the DRX period list to AMF and save it.

The CU is used to determine that there is a target DU for the second paging if the second paging message sent by the AMF for the target DU is received, and the second paging message is determined by the AMF in the It is sent when the paging response of the UE is not received after the target DRX cycle duration corresponding to the target DU.

The AMF is used to receive and save the DRX cycle list sent by the CU.

The AMF is used for each DU to determine whether the target DRX cycle duration corresponding to the DU is received after receiving the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list The paging response of the UE; if not, send a second paging message to the CU.

The AMF is configured to receive first prompt information sent by the first target CU, and the first prompt information is sent when the first target CU determines that there is at least one DU paging success; according to the first prompt information , Sending second prompt information for stopping paging to a second target CU of the target CUs other than the first target CU.

On the basis of the foregoing embodiments, the embodiments of the present application further provide a computer-readable storage medium in which a computer program executable by an electronic device is stored. When the program is in the electronic When running on the device, the electronic device implements the following steps when executed:

A computer program is stored in the memory, and when the program is executed by the processor, the processor is caused to perform the following steps:

Receiving a first paging message sent by the core network AMF, where the first paging message carries information about the first DRX cycle of the UE to be paged;

Send information about the first DRX cycle of the UE to each DU according to the first paging message, so that each DU pages the UE;

If it is determined that there is a target DU for the second paging, send a second paging message for the target DU to the target DU, where the target DU is not received after the target DRX cycle corresponding to the target DU To the paging response for the target DU.

Further, the processor receives information about the second DRX cycle supported by each DU sent by each DU connected to the CU; and generates information for each DU according to the received information about each second DRX cycle List of DRX cycles.

Further, for each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, the processor determines whether the target DRX cycle duration corresponding to the DU is received Describe the paging response of the UE; if not, determine the DU as the target DU.

Further, if the processor receives the paging response of the UE, the first prompt message that at least one DU paging succeeded is sent to the AMF, so that the AMF sends the other prompt messages to other CUs according to the first prompt message Send a second prompt message to stop paging.

Further, the processor receives the second prompt message sent by the AMF to stop paging, and notifies each DU connected to itself to stop paging.

Further, the processor receives information about the second DRX cycle supported by each DU sent by each DU connected to the CU; and generates information for each DU according to the received information about each second DRX cycle DRX cycle list; send the DRX cycle list to AMF and save it.

Further, if the processor receives the second paging message for the target DU sent by the AMF, it determines that there is a target DU for the second paging, and the second paging message determines that the AMF is in Sent when the target DRX cycle corresponding to the target DU does not receive the paging response of the UE.

The above computer-readable storage medium may be any available medium or data storage device that can be accessed by a processor in an electronic device, including but not limited to magnetic storage such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc., optical storage such as CD , DVD, BD, HVD, etc., as well as semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid state hard disk (SSD), etc.

On the basis of the foregoing embodiments, the embodiments of the present application further provide a computer-readable storage medium in which a computer program executable by an electronic device is stored. When the program is in the electronic When running on the device, the electronic device implements the following steps when executed:

A computer program is stored in the memory, and when the program is executed by the processor, the processor is caused to perform the following steps:

Receiving the first DRX cycle information of the UE to be paged, and determining the target CU according to the location information of the UE;

Sending a first paging message to the target CU, where the first paging message carries information about the first DRX cycle.

Further, the processor receives and saves the DRX cycle list sent by the CU.

Further, for each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, the processor determines whether the target DRX cycle duration corresponding to the DU is received Describe the paging response of the UE; if not, send a second paging message to the CU.

Further, the processor receives first prompt information sent by the first target CU, and the first prompt information is sent when the first target CU determines that there is at least one DU paging success; according to the first prompt Information, sending second prompt information to stop paging to a second target CU of the target CUs other than the first target CU.

The above computer-readable storage medium may be any available medium or data storage device that can be accessed by a processor in an electronic device, including but not limited to magnetic storage such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc., optical storage such as CD , DVD, BD, HVD, etc., as well as semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid state hard disk (SSD), etc.

In summary, the present application provides a paging method, device, system, CU, AMF, and storage medium to solve the problem that the conventional technology cannot repeat paging in the CU / DU separation mode. The method includes: a central unit CU receives a first paging message sent by an AMF of a core network, the first paging message carrying information of a first discontinuous reception DRX cycle of a terminal UE to be paged; according to the first Paging message, sending the information of the first DRX cycle of the UE to each distributed unit DU, so that each DU pages the UE; if the CU determines that there is a target DU for the second paging, it will A second paging message for the target DU is sent to the target DU, where the target DU is that no paging response for the target DU is received after a target DRX cycle corresponding to the target DU.

For the system / apparatus embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method embodiment.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or one operation from another entity or another operation, and do not necessarily require or imply these entities Or there is any such actual relationship or order between operations.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely application embodiment, or an embodiment combining applications and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

This application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the application. It should be understood that each flow and / or block in the flowchart and / or block diagram and a combination of the flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing device An apparatus for realizing the functions specified in one block or multiple blocks of one flow or multiple flows of a flowchart and / or one block or multiple blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and / or block diagrams.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and / or block diagrams.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (27)

1. A paging method, characterized in that the method includes:

   The central unit CU receives the first paging message sent by the core network AMF, where the first paging message carries information about the first discontinuous reception DRX cycle of the terminal UE to be paged;

   Send information about the first DRX cycle of the UE to each distributed unit DU according to the first paging message, so that each DU pages the UE;

   If the CU determines that there is a target DU for the second paging, it sends a second paging message for the target DU to the target DU, where the target DU is not after the target DRX cycle corresponding to the target DU The DU that received the paging response for the target DU.
2. The method according to claim 1, wherein before the receiving the first paging message sent by the AMF, the method further comprises:

   Receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU;

   According to the received information of each second DRX cycle, a list of DRX cycles for each DU is generated.
3. The method according to claim 2, wherein the determining that there is a target DU for the second paging includes:

   For each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, determine whether the target DRX cycle duration corresponding to the DU has received the paging response of the UE;

   If not, it is determined that the DU is the target DU.
4. The method of claim 2, wherein the method further comprises:

   If the CU receives the paging response from the UE, the first prompt message indicating that at least one DU paging succeeded is sent to the AMF, so that the AMF sends the first page to stop paging to other CUs according to the first prompt message Two prompt information.
5. The method of claim 2, wherein the method further comprises:

   Receive the second prompt message sent by the AMF to stop paging, and notify each DU connected to itself to stop paging.
6. The method according to claim 1, wherein before the receiving the first paging message sent by the AMF, the method further comprises:

   Receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU;

   Generate a list of DRX cycles for each DU according to the received information of each second DRX cycle;

   Send the DRX cycle list to AMF and save it.
7. The method according to claim 6, wherein the determining that there is a target DU for the second paging includes:

   If a second paging message for the target DU sent by the AMF is received, it is determined that there is a target DU for the second paging, and the second paging message is the target DRX that the AMF judges at the target DU Sent when the paging response of the UE is not received after the period duration.
8. A paging method, characterized in that the method includes:

   The AMF receives the information of the first DRX cycle of the UE to be paged, and determines the target CU according to the location information of the UE;

   Sending a first paging message to the target CU, where the first paging message carries information about the first DRX cycle.
9. The method according to claim 8, wherein before the sending the first paging message to the target CU, the method further comprises:

   Receive the DRX cycle list sent by the CU and save it.
10. The method of claim 9, wherein the method further comprises:

    For each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, determine whether the target DRX cycle duration corresponding to the DU has received the paging response of the UE;

    If not, send a second paging message to the CU.
11. The method of claim 8, wherein the method further comprises:

    Receiving first prompt information sent by a first target CU, where the first prompt information is sent when the first target CU determines that there is at least one DU paging success;

    According to the first prompt information, send second prompt information for stopping paging to a second target CU of the target CUs other than the first target CU.
12. A CU, characterized in that the CU includes a memory, a processor and a transceiver:

    The transceiver performs data reception and transmission under the control of the processor;

    The memory stores computer instructions;

    The processor is configured to read the computer instructions and perform the following operations:

    Receiving a first paging message sent by the core network AMF, where the first paging message carries information about the first discontinuous reception DRX cycle of the terminal UE to be paged;

    Send information about the first DRX cycle of the UE to each distributed unit DU according to the first paging message, so that each DU pages the UE;

    If it is determined that there is a target DU for the second paging, send a second paging message for the target DU to the target DU, where the target DU is not received after the target DRX cycle corresponding to the target DU To the DU of the paging response to the target DU.
13. The CU of claim 12, wherein the operation further comprises:

    Receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU;

    According to the received information of each second DRX cycle, a list of DRX cycles for each DU is generated.
14. The CU according to claim 13, wherein the operation specifically includes:

    For each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, determine whether the target DRX cycle duration corresponding to the DU has received the paging response of the UE; If not, it is determined that the DU is the target DU.
15. The CU of claim 13, wherein the operation further comprises:

    If the paging response of the UE is received, the first prompt message that at least one DU paging succeeded is sent to the AMF, so that the AMF sends a second stop paging message to other CUs according to the first prompt message Prompt information.
16. The CU of claim 12, wherein the operation further comprises:

    Receiving information about the second DRX cycle supported by each DU sent by each DU connected to the CU;

    Generate a list of DRX cycles for each DU according to the received information of each second DRX cycle;

    Send the DRX cycle list to AMF and save it.
17. The CU according to claim 16, wherein the operation specifically comprises:

    If a second paging message for the target DU sent by the AMF is received, it is determined that there is a target DU for the second paging, and the second paging message is the target DRX that the AMF determines to correspond to the target DU Sent when the paging response of the UE is not received after the period duration.
18. The CU of claim 13, wherein the operation further comprises:

    Receive the second prompt message sent by the AMF to stop paging, and notify each DU connected to itself to stop paging.
19. An AMF is characterized in that the AMF includes a memory, a processor and a transceiver:

    The transceiver performs data reception and transmission under the control of the processor;

    The memory stores computer instructions;

    The processor is configured to read the computer instructions and perform the following operations:

    Receiving the first DRX cycle information of the UE to be paged, and determining the target CU according to the location information of the UE;

    Sending a first paging message to the target CU, where the first paging message carries information about the first DRX cycle.
20. The AMF of claim 19, wherein the operation further comprises:

    Before sending the first paging message to the target CU, receive and save the DRX cycle list sent by the CU.
21. The AMF of claim 20, wherein the operation further comprises:

    For each DU, according to the second DRX cycle and the first DRX cycle of the DU stored in the DRX cycle list, determine whether the target DRX cycle duration corresponding to the DU has received the paging response of the UE; If not, send a second paging message to the CU.
22. The AMF of claim 19, wherein the operation further comprises:

    Receiving first prompt information sent by a first target CU, the first prompt information is sent when the first target CU judges that there is at least one DU paging success; according to the first prompt information, to the target CU The second target CU other than the first target CU sends second prompt information to stop paging.
23. A paging device, characterized in that the device includes:

    A first receiving module, configured to receive a first paging message sent by the core network AMF, where the first paging message carries information about the first discontinuous reception DRX cycle of the terminal UE to be paged;

    A first sending module, configured to send the information of the first DRX cycle of the UE to each distributed unit DU according to the first paging message, so that each DU pages the UE;

    The determining module is configured to send a second paging message for the target DU to the target DU if it is determined that there is a target DU for the second paging, where the target DU is the target corresponding to the target DU After the DRX cycle, the DU that did not receive the paging response to the target DU.
24. A paging device, characterized in that the device includes:

    A second receiving module, configured to receive the first DRX cycle information of the UE to be paged, and determine the target CU according to the location information of the UE;

    The second sending module is configured to send a first paging message to the target CU, where the first paging message carries information about the first DRX cycle.
25. A computer-readable storage medium, characterized in that it stores a computer program executable by a CU, and when the program runs on the CU, causes the CU to perform the method of any one of claims 1-7 A step of.
26. A computer-readable storage medium, characterized in that it stores a computer program executable by AMF, and when the program runs on the AMF, the AMF executes the method of any one of claims 8-11 A step of.
27. A paging system, characterized in that the system includes a paging device applied to the central unit CU according to claim 23, and a paging device applied to the core network AMF according to claim 24.

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