WO2019024599A1

WO2019024599A1 - Control method, distributed unit, centralised unit, and storage medium

Info

Publication number: WO2019024599A1
Application number: PCT/CN2018/090286
Authority: WO
Inventors: 李刚; 刘亮
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2017-08-01
Filing date: 2018-06-07
Publication date: 2019-02-07
Also published as: CN109548037A; CN109548037B

Abstract

Disclosed are a control method, a distributed unit, a centralised unit, and a storage medium, the method comprising: receiving state information sent by at least one centralised unit CU; on the basis of the state information of the at least one CU, selecting a target CU to provide service to a UE.

Description

Control method, distributed unit, centralized unit and storage medium

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. No. No. No. No. No. No. No. No. No. No. No. No. No.

Technical field

The present disclosure relates to device management technologies in the field of communications, and in particular, to a control method, a distributed unit, a centralized unit, and a storage medium.

Background technique

The access network logical node in the 3G system is composed of NB and RNC, and the 4G logical architecture design is more flat, including only eNB nodes. The most typical requirement in the 4G access network is that the access network supports the logical function division of distributed remote units (RUs) and central units (CUs), and supports the protocol stack functions in CU and DU. Migration between. The CU is a centralized node that can control and coordinate multiple cells, including the high-layer control and data functions of the protocol stack, and may also include some baseband processing functions. The DU is a distributed unit that implements a radio frequency front end (RRH) function and other baseband processing functions. The CU and the DU are connected through a preamble interface.

However, the above technical solution is a fixed configuration of the relationship between the CU and the DU. When the CU fails, the impact on the service is large.

Summary of the invention

The main purpose of the present disclosure is to provide a control method, a distributed unit, a centralized unit, and a storage medium, which are intended to solve the above problems in the related art.

To achieve the above object, the present disclosure provides a control method applied to a DU, including:

Receiving status information sent by at least one centralized unit CU;

Based on the status information of the at least one CU, the target CU is selected to provide a service for the user equipment UE.

The embodiment of the present disclosure further provides a control method applied to a CU, including:

Obtaining state information of itself and state information of at least one centralized unit CU other than itself;

The target CU is selected to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.

The embodiment of the present disclosure further provides a DU, including:

An information receiving unit, configured to receive status information sent by at least one centralized unit CU;

The information processing unit is configured to select a target CU to provide a service for the user equipment UE based on the status information of the at least one CU.

An embodiment of the present disclosure provides a DU, including:

a communication interface, configured to receive status information sent by at least one centralized unit CU;

And a processor, configured to select, according to the status information of the at least one CU, a target CU to provide a service for the user equipment UE.

An embodiment of the present disclosure provides a CU, including:

An information acquiring unit, configured to acquire state information of the self, and state information of at least one centralized unit CU except itself;

The processing unit is configured to select a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.

An embodiment of the present disclosure provides a CU, including:

a communication interface, configured to acquire state information of at least one centralized unit CU other than itself;

The processor is configured to obtain status information of the user, and select a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.

The present disclosure provides a DU including: a processor and a memory for storing a computer program executable on the processor,

Wherein, when the processor is configured to run the computer program, the step of the above-mentioned control method applied to the DU is performed.

The present disclosure provides a CU comprising: a processor and a memory for storing a computer program executable on the processor,

Wherein, when the processor is configured to run the computer program, the step of applying the control method applied to the CU is performed.

The present disclosure provides a storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement the steps of the foregoing method.

The control method, the distributed unit, the centralized unit and the storage medium provided by the disclosure provide status information of a plurality of CUs, and select a target CU for the UE to serve based on the status information of the multiple CUs, thereby avoiding the fixed relationship between the CU and the DU. The configuration may occur when the CU fails, and the service on the UE side is greatly affected. The state of the multiple CUs in the CU pool can be combined to select the most suitable CU for the UE to serve, thereby ensuring the service. reliability.

DRAWINGS

1 is a schematic flow chart 1 of a control method according to an embodiment of the present disclosure;

2 is a schematic flowchart 2 of a control method according to an embodiment of the present disclosure;

3 is a schematic flowchart 3 of a control method according to an embodiment of the present disclosure;

4 is a schematic flowchart 4 of a control method according to an embodiment of the present disclosure;

5 is a schematic flow chart 5 of a control method according to an embodiment of the present disclosure;

6 is a schematic flowchart 6 of a control method according to an embodiment of the present disclosure;

Figure 7 is a schematic flowchart 7 of a control method according to an embodiment of the present disclosure;

Figure 8 is a schematic structural view 1 of the DU of the embodiment of the present disclosure;

Figure 9 is a schematic structural view 2 of the DU of the embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a CU according to an embodiment of the present disclosure.

Detailed ways

The present disclosure will be further described in detail below in conjunction with the drawings and specific embodiments.

Embodiment 1

The embodiment of the present disclosure provides a control method, as shown in FIG. 1 , including:

Step 101: Receive status information sent by at least one central unit CU.

Step 102: Select a target CU to provide a service for the user equipment UE, based on the status information of the at least one CU.

This embodiment can be applied to a distributed unit DU. First, the scenario corresponding to the embodiment is described with reference to FIG. 2. As shown in FIG. 2, a CU pool includes multiple CUs, as shown in the figure, there are two CU1 and CU2, and more CUs can be built in the actual scene construction. However, it is not exhaustive in this embodiment. In addition, as shown in the figure, each CU in the CU pool can establish a connection with multiple DUs. For example, CU1 and CU2 shown in the figure can establish connections with DU1-1, 1-2, and DU2-1, 2-2. CU1 can also establish a connection only with DU1-1 and 1-2. Further, the DU can establish a connection with a User Equipment (UE).

Specifically, the CU and the DU in the CU pool are connected by IP to ensure data connectivity; the CU in the CU pool sends status information to all the DUs, which may include: processing capability and load, or error information, etc. Status information (periodic or event triggered).

Moreover, the CU selection function is introduced in the DU, and the DU selects an appropriate CU in the pool to serve the user according to the state of the CU.

This embodiment can be combined with the following scenarios to describe the process of selecting a CU for a UE in different scenarios:

Scenario 1, load balancing process:

The selecting a target CU to provide a service for the user equipment UE, based on the status information of the at least one CU, includes:

Receiving request information sent by the UE;

And selecting, according to the request information, the status information of the at least one CU, the target CU to provide a service for the UE that sends the request information, where the status information includes at least Describe the load of the CU.

In this scenario, the CU is selected by the DU. The request information sent by the user is an example of the user initiated service. For example, the process of attaching the location update TAU, the service request service request, and the like may be performed.

Referring to FIG. 3, first, CU1 and CU2 can send status information to the DU, and the capacity and working status of CU1 and CU2 are transmitted through the status information.

When receiving the request information sent by the UE, the CU1 may be disconnected from the original CU1, and then one CU whose current load is lower than the low load threshold is selected from CU1 and CU2, that is, CU2 is selected to provide services for the UE;

The UE then performs a subsequent processing flow based on CU2.

Scenario 2: The UE actively initiates a connection.

Receiving the release connection indication information sent by the original CU that is currently serving the UE, and sending the release connection indication information to the UE;

Receiving an update request sent by the UE, selecting a target CU to provide a service for the user equipment UE, based on a load condition of the at least one CU; wherein the target CU is different from the original CU.

As shown in FIG. 4, when the UE is in the RRC connection state, the CU1 in the CU pool determines that its own load is higher than the preset load threshold by its own state information, and the CU1 sends a notification of the RRC connection release to the DU; Sending a notification of the RRC connection release to the UE; then the DU receives the request for deleting the RRC connection sent by the UE; after receiving the request for the tracking area update sent by the UE, the DU initiates a process of selecting a new CU, and the DU according to at least For the status information of a CU, a CU that selects a load in the CU pool that is lower than the low load threshold is used to provide services for the UE. For example, the CU2 is selected to provide services for the UE; further, the DU may send the selected CU2. TAU request.

Scene 3,

Sending fault detection information to at least one CU;

Determining that the target CU provides a service for the user equipment UE based on the status information of the at least one CU, wherein the target CU is different from the fault CU; The status information includes at least a load condition and a processing capability of the at least one CU.

This scenario can be applied to the CU fault re-selection process. As shown in Figure 5, the DU receives the status information sent by each CU in the CU pool (specifically, the status report in the figure); the DU periodically goes to the CU pool. Each CU sends a fault detection (such as a heartbeat detection); if the DU finds that CU1 is faulty or an error occurs, the CU is reselected;

The DU selects a CU whose load is lower than the low load threshold according to the status information to provide services for the UE, for example, selecting CU2 in the figure for service; then the DU establishes a logical connection with CU2; thereafter, the UE and CU2 perform subsequent processing procedures.

It can be seen that, by adopting the foregoing solution, status information of multiple CUs can be provided, and the target CU is selected for serving by the UE based on the status information of multiple CUs, so that the CU and the DU can be avoided due to the fixed configuration of the relationship between the CU and the DU. When the fault occurs, the service on the UE side is greatly affected. The state of the multiple CUs in the CU pool can be combined to select the most suitable CU for the UE to serve, thereby ensuring the reliability of the service.

Embodiment 2

The embodiment of the present disclosure provides a control method, as shown in FIG. 6, including:

Step 601: Acquire state information of itself and state information of at least one centralized unit CU except itself;

Step 602: Select a target CU to provide a service for the user equipment UE, based on the status information of the self and the status information of the at least one CU.

This embodiment can be applied to a CU. First, the scenario corresponding to the embodiment is described with reference to FIG. 2. As shown in FIG. 2, a CU pool includes multiple CUs, as shown in the figure, there are two CU1 and CU2, and more CUs can be built in the actual scene construction. However, it is not exhaustive in this embodiment. In addition, as shown in the figure, each CU in the CU pool can establish a connection with multiple DUs. For example, CU1 and CU2 shown in the figure can establish connections with DU1-1, 1-2, and DU2-1, 2-2. CU1 can also establish a connection only with DU1-1 and 1-2. Further, the DU can establish a connection with a User Equipment (UE).

Scenario 1, load balancing process:

The selecting the target CU to provide the service for the user equipment UE, based on the status information of the self and the status information of the at least one CU, includes:

Receiving request information sent by the UE;

Based on the request information, based on the status information of the self and the status information of the at least one CU other than itself, the target CU is selected from the at least one CU to provide a service for the UE that sends the request information.

The UE then performs a subsequent processing flow based on CU2.

Scenario 2: The UE actively initiates a connection.

Determining whether the current load exceeds a preset load threshold based on its own state information;

If the preset load threshold is exceeded, sending release connection indication information to the CU;

Correspondingly, the selecting the target CU to provide the service for the user equipment UE, based on the status information of the at least one CU, includes:

Scene 3,

Determining, according to the state information of the self, that the load of the self is in a state exceeding a preset load threshold;

Selecting, by the state information of the at least one CU other than itself, the target CU to provide a service for the UE;

The information of the selected target CU is sent to the distributed unit DU.

This scenario can be applied to the CU reselection process. As shown in FIG. 7, the RRC connection information sent by the UE is received, and the CU1 determines whether the load is too high based on its own state information; if yes, the CU1 is based on the status of other CUs. Information, selecting one CU (such as CU2) whose load is lower than the low load threshold from other CUs to provide services for the UE; then CU1 shares the context of the UE with CU2, so that CU2 provides services for the UE; CU1 sends a reselection to the DU. Notification information of CU2; and CU2 performs path switching processing with the core network; the UE and CU2 perform operations for transmitting data.

It can be seen that, by adopting the foregoing solution, the status information of multiple CUs can be provided, and the target CU is selected for the UE to serve based on the status information of multiple CUs, so that the CU and the DU can be avoided due to the fixed configuration of the relationship between the CU and the DU. When the fault occurs, the service on the UE side is greatly affected. The state of the multiple CUs in the CU pool can be combined to select the most suitable CU for the UE to serve, thereby ensuring the reliability of the service.

Embodiment 3

An embodiment of the present disclosure provides a DU, as shown in FIG. 8, including:

The information receiving unit 81 is configured to receive status information sent by at least one centralized unit CU;

The information processing unit 82 is configured to select a target CU to provide a service for the user equipment UE based on the status information of the at least one CU.

Scenario 1, load balancing process:

The information receiving unit is configured to receive request information sent by the UE;

An information processing unit, configured to select, according to the request information, and status information of the at least one CU, a target CU from the at least one CU to provide a service for a UE that sends the request information; wherein the status The information includes at least the load condition of the CU.

The UE then performs a subsequent processing flow based on CU2.

Scenario 2: The UE actively initiates a connection.

The information processing unit is configured to receive the release connection indication information sent by the original CU that is currently serving the UE, and send the release connection indication information to the UE;

Scene 3,

An information processing unit, configured to send fault detection information to the at least one CU; when it is determined that the faulty CU exists in the at least one CU, the target CU is selected to provide a service for the user equipment UE, based on the status information of the at least one CU; The target CU is different from the faulty CU; wherein the status information includes at least a load condition and a processing capability of the at least one CU.

Embodiment 4

An embodiment of the present disclosure provides a DU, as shown in FIG. 9, including:

a communication interface 91, configured to receive status information sent by at least one centralized unit CU;

The processor 92 is configured to select a target CU to provide a service for the user equipment UE based on the status information of the at least one CU.

Scenario 1, load balancing process:

The communication interface 91 is configured to receive request information sent by the UE, and the processor 92 is configured to select, according to the request information, status information of the at least one CU, a target CU from the at least one CU. Providing a service for the UE that sends the request information; wherein the status information includes at least a load condition of the CU.

The UE then performs a subsequent processing flow based on CU2.

Scenario 2: The UE actively initiates a connection.

The processor 92 is configured to receive the release connection indication information sent by the original CU that is currently serving the UE, and send the release connection indication information to the UE;

Scene 3,

The processor 92 is configured to send the fault detection information to the at least one CU. When it is determined that the faulty CU exists in the at least one CU, the target CU is selected to provide a service for the user equipment UE, based on the status information of the at least one CU. The target CU is different from the faulty CU; wherein the status information includes at least a load condition and a processing capability of the at least one CU.

Embodiment 5

The embodiment of the present disclosure provides a CU, as shown in FIG. 10, including:

The information acquiring unit 1001 is configured to acquire state information of itself and state information of at least one centralized unit CU except itself;

The processing unit 1002 is configured to select a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.

First, the scenario corresponding to the embodiment is described with reference to FIG. 2. As shown in FIG. 2, a CU pool includes multiple CUs, as shown in the figure, there are two CU1 and CU2, and more CUs can be built in the actual scene construction. However, it is not exhaustive in this embodiment. In addition, as shown in the figure, each CU in the CU pool can establish a connection with multiple DUs. For example, CU1 and CU2 shown in the figure can establish connections with DU1-1, 1-2, and DU2-1, 2-2. CU1 can also establish a connection only with DU1-1 and 1-2. Further, the DU can establish a connection with a User Equipment (UE).

Scenario 1, load balancing process:

The information obtaining unit 1001 is configured to receive request information sent by the UE.

The processing unit 1002 is configured to select, according to the request information, the target CU from the at least one CU as the UE that sends the request information, based on the status information of the self and the status information of the at least one CU other than the self. Provide services.

The UE then performs a subsequent processing flow based on CU2.

Scenario 2: The UE actively initiates a connection.

The processing unit 1002 is configured to determine, according to the state information of the self, whether the current load exceeds a preset load threshold.

Scene 3,

The processing unit 1002 is configured to determine, according to the state information of the self, that the load of the self is in a state exceeding a preset load threshold;

The information of the selected target CU is sent to the distributed unit DU.

Embodiment 6

An embodiment of the present disclosure provides a CU, including:

Scenario 1, load balancing process:

The communication interface is configured to receive request information sent by the UE;

a processor, configured to select, according to the request information, the status information of the at least one CU and the status information of the at least one CU other than the CU, to obtain the target CU from the UE that sends the request information service.

The UE then performs a subsequent processing flow based on CU2.

Scenario 2: The UE actively initiates a connection.

a processor, configured to determine, according to its own state information, whether the current load exceeds a preset load threshold;

Scene 3,

a processor, configured to determine, according to the state information of the self, that the load of the self is in a state exceeding a preset load threshold;

The information of the selected target CU is sent to the distributed unit DU.

Further, the present application further provides a storage medium having stored thereon a computer program, wherein the computer program is executed by the processor to implement the steps of the method described in Embodiments 1 and 2. And the steps of the method provided in Embodiments 1 and 2 are implemented when the computer program is executed by the processor, and details are not described herein again.

It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes those elements. It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, article, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The above-mentioned serial numbers of the embodiments of the present disclosure are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, portions of the technical solutions of the present disclosure that contribute substantially or to the prior art may be embodied in the form of a software product stored in a storage medium (eg, ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device device (which may be a cell phone, computer, device, air conditioner, or network device, etc.) to perform the methods described in various embodiments of the present disclosure.

The above is only an alternative embodiment of the present disclosure, and thus does not limit the scope of the patents of the present disclosure, and the equivalent structure or equivalent process transformations made by the disclosure and the contents of the drawings, or directly or indirectly applied to other related technologies. The scope of the invention is included in the scope of patent protection of the present disclosure.

Claims

A control method is applied to a distributed unit DU, the method comprising:

Receiving status information sent by at least one centralized unit CU;

Based on the status information of the at least one CU, the target CU is selected to provide a service for the user equipment UE.
The method according to claim 1, wherein the selecting a target CU to provide a service for the user equipment UE based on the status information of the at least one CU comprises:

Receiving request information sent by the UE;

And selecting, according to the request information, the status information of the at least one CU, the target CU to provide a service for the UE that sends the request information, where the status information includes at least Describe the load of the CU.
The method according to claim 1, wherein the selecting a target CU to provide a service for the user equipment UE based on the status information of the at least one CU comprises:

Receiving the release connection indication information sent by the original CU that is currently serving the UE, and sending the release connection indication information to the UE;

Receiving an update request sent by the UE, selecting a target CU to provide a service for the user equipment UE, based on a load condition of the at least one CU; wherein the target CU is different from the original CU.
The method of claim 1 wherein the method further comprises:

Sending fault detection information to at least one CU;

Determining that the target CU provides a service for the user equipment UE based on the status information of the at least one CU, wherein the target CU is different from the fault CU; The status information includes at least a load condition and a processing capability of the at least one CU.
A control method is applied to a CU, and the method includes:

Obtaining state information of itself and state information of at least one centralized unit CU other than itself;

The target CU is selected to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.
The method according to claim 5, wherein the selecting a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU includes:

Receiving request information sent by the UE;

And selecting, according to the request information, the status information of the at least one CU and the status information of the at least one CU, in addition to the self, the target CU to provide a service for the UE that sends the request information.
The method according to claim 5, wherein the selecting a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU includes:

Determining, according to the state information of the self, that the load of the self is in a state exceeding a preset load threshold;

Selecting, by the state information of the at least one CU other than itself, the target CU to provide a service for the UE;

The information of the selected target CU is sent to the distributed unit DU.
The method of claim 5 wherein the method further comprises:

Determining whether the current load exceeds a preset load threshold based on its own state information;

If the preset load threshold is exceeded, the release connection indication information is sent to the CU.
A DU that includes:

An information receiving unit, configured to receive status information sent by at least one centralized unit CU;

The information processing unit is configured to select a target CU to provide a service for the user equipment UE based on the status information of the at least one CU.
A DU that includes:

a communication interface, configured to receive status information sent by at least one centralized unit CU;

And a processor, configured to select, according to the status information of the at least one CU, a target CU to provide a service for the user equipment UE.
The DU according to claim 10, wherein the processor is configured to receive request information sent by the UE, and based on the request information, and status information of the at least one CU, from the at least one CU. The target CU is selected to provide a service for the UE that sends the request information, where the status information includes at least the load condition of the CU.
The DU according to claim 10, wherein the processor is configured to receive release connection indication information sent by an original CU currently serving the UE, send the release connection indication information to the UE, and receive The update request sent by the UE is based on the load condition of the at least one CU, and the target CU is selected to provide a service for the user equipment UE; wherein the target CU is different from the original CU.
The DU according to claim 10, wherein the processor is configured to send fault detection information to at least one CU; and when it is determined that there is a faulty CU in the at least one CU, based on status information of the at least one CU, The target CU is selected to provide a service for the user equipment UE; wherein the target CU is different from the faulty CU; wherein the status information includes at least a load condition and a processing capability of the at least one CU.
A CU that includes:

An information acquiring unit, configured to acquire state information of the self, and state information of at least one centralized unit CU except itself;

The processing unit is configured to select a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.
A CU that includes:

a communication interface, configured to acquire state information of at least one centralized unit CU other than itself;

The processor is configured to obtain status information of the user, and select a target CU to provide a service for the user equipment UE based on the status information of the self and the status information of the at least one CU.
The CU according to claim 15, wherein the processor is configured to receive request information sent by the UE, and based on the request information, state information based on the self and status information of the at least one CU except itself And selecting, by the at least one CU, the target CU to provide a service for the UE that sends the request information.
The CU according to claim 15, wherein the processor is configured to determine, according to the state information of the self, that a load of the self is in a state exceeding a preset load threshold; from at least one CU other than itself Status information, selecting a target CU to provide services for the UE;

The information of the selected target CU is sent to the distributed unit DU.
The CU according to claim 15, wherein the processor is configured to determine, according to state information of the self, whether the current load exceeds a preset load threshold; if the preset load threshold is exceeded, The CU sends a release connection indication message.
A DU includes: a processor and a memory for storing a computer program capable of running on the processor,

Wherein the processor is operative to perform the steps of the method of any one of claims 1-4 when the computer program is run.
A CU comprising: a processor and a memory for storing a computer program capable of running on the processor,

Wherein the processor is operative to perform the steps of the method of any one of claims 5-8 when the computer program is run.
A storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to perform the steps of the method of any of claims 1-8.