KR102393333B1 - Method of Blocking a 5G NR Addition - Google Patents

Abstract

A method of blocking 5G (5th Generation) NR (New radio) addition is provided. The method includes the steps of receiving a measurement report from the terminal, allowing an NR additional configuration procedure to be performed in response to receiving the measurement report from the terminal, and receiving an NR additional configuration failure message from the terminal Step, allowing an NR release procedure to be performed in response to receiving the NR additional configuration failure message from the terminal, and blocking additional NR configuration in response to an additional measurement report received from the terminal for a predetermined time may include

Description

Method of Blocking a 5G NR Addition

The present invention relates to mobile communication technology.

In recent years, 5G (5th Generation) communication technology, which is a 5G technology standard for a cellular communication network, has become a hot topic in the communication industry. With 2019 as the first year, many telecommunication companies in many countries are deploying and commercializing 5G communication systems. The 5G communication system provides communication services by dividing the service area into small geographic areas called 'cells' like its predecessor, the 4G communication system. to the Internet and telephone networks. The 5G communication network is classified into a 5G NSA (Non-standalone) network and a 5G SA (Standalone) network. Among them, the 5G NSA network utilizes the 4G core network, not the self-established core network, and the 4G base station is responsible for functions belonging to the control plane such as signaling, and it belongs to the user plane such as data traffic transmission. The function is structured to be processed by the 5G base station. In addition, the 5G NSA standard was first distributed among the 5G SA standard and the 5G NSA standard, and for this reason, the 5G communication system was commercialized as the NSA standard first in Korea.

An object of the present invention is to provide a technology for blocking 5G NR additional configuration when 5G NR additional configuration fails in 5G NSA network.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In one aspect, a method for blocking 5th generation (5G) NR (New radio) addition is provided. The method includes the steps of receiving a measurement report from the terminal, allowing an NR additional configuration procedure to be performed in response to receiving the measurement report from the terminal, and receiving an NR additional configuration failure message from the terminal Step, allowing an NR release procedure to be performed in response to receiving the NR additional configuration failure message from the terminal, and blocking additional NR configuration in response to an additional measurement report received from the terminal for a predetermined time may include

In one embodiment, the method is performed by a 4G base station.

In an embodiment, the receiving of the measurement report from the terminal includes receiving the event B1 report from the terminal, and in response to receiving the event B1 report, to cells of a 5G base station adjacent to the terminal Transmitting a message instructing to perform the measurement, and receiving, from the terminal, a measurement report including measurement results for cells of a 5G base station adjacent to the terminal.

In one embodiment, the 5G base station adjacent to the terminal is a DU (Digital Unit) in a radio access network (Radio Access Network), and the cells of the 5G base station are RUs (Radio Units) connected to the DU.

In an embodiment, the step of performing the NR additional configuration procedure in response to receiving the measurement report from the terminal includes the terminal, a 5G base station adjacent to the terminal, a mobility management device interworking with the 5G base station, and the mobility and performing an NR additional setting procedure in cooperation with a gateway device interworking with the management device.

In an embodiment, the mobility management device is a Mobility Management Entity (MME) defined in 3GPP (3rd Generation Partnership Project), and the gateway device is a Serving/Packet Data Network Gateway (SPGW) defined in 3GPP.

In one embodiment, the step of blocking additional configuration of NR in response to the additional measurement report received from the terminal for the predetermined time includes adding NR in response to the additional measurement report received from the terminal for the predetermined time Includes steps that do not perform a setup procedure.

In an embodiment, the method further includes controlling the NR additional configuration procedure to be performed in response to the additional measurement report received from the terminal after the expiration of the predetermined time.

In another aspect, a method of blocking 5G NR additional configuration in a 4th generation (4G) base station is provided. The method may include continuously receiving a NR additional configuration failure message from the terminal a predetermined number of times, and blocking the NR additional configuration in response to a measurement report received from the terminal for a predetermined time.

In one embodiment, the step of continuously receiving the NR additional configuration failure message from the terminal a predetermined number of times includes: (i) receiving a measurement report from the terminal, (ii) allowing the NR additional configuration procedure to be performed , (iii) receiving the NR additional configuration failure message from the terminal, (iv) allowing the NR release procedure to be performed, and (v) performing the steps (i) to (iv) the predetermined number of times It involves repeating steps.

In one embodiment, the step (i) of receiving the measurement report from the terminal includes: receiving the event B1 report from the terminal, in response to receiving the event B1 report for cells of a 5G base station adjacent to the terminal transmitting a message instructing to perform measurement, and receiving, from the terminal, a measurement report including measurement results for cells of a 5G base station adjacent to the terminal.

In an embodiment, the 5G base station adjacent to the terminal is a DU in a radio access network, and cells of the 5G base station are RUs connected to the DU.

In an embodiment, the step (ii) of performing the NR additional configuration procedure comprises: the terminal, a 5G base station adjacent to the terminal, a mobility management device interworking with the 5G base station, and a gateway device interworking with the mobility management device; It includes the step of performing the NR additional setup procedure in collaboration.

In an embodiment, the mobility management device is an MME defined in 3GPP, and the gateway device is an SPGW defined in 3GPP.

In one embodiment, the step of blocking the NR additional setting in response to the measurement report received from the terminal for a predetermined time includes performing the NR additional setting procedure in response to the measurement report received from the terminal for the predetermined time. steps that do not include

In an embodiment, the method further includes controlling the NR additional configuration procedure to be performed in response to the additional measurement report received from the terminal after the expiration of the predetermined time.

According to embodiments of the present invention, there is a technical effect that can block 5G NR additional configuration when 5G NR additional configuration fails in 5G NSA network.

1A and 1B are 5G Non-Standalone (NSA) for explaining a scenario in which a 5G (5th Generation) NR (New Radio) addition is performed in a 4G base station after a UE connects a call to a 4G (4th Generation) network. ) is a diagram showing embodiments of network configuration diagrams.
2 is a diagram illustrating an embodiment of a flowchart for explaining a 5G NR additional configuration procedure.
3 is a diagram illustrating an embodiment of a flowchart for explaining a method of blocking additional configuration of 5G NR according to the disclosed technology.

Advantages and features of the present invention and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and these embodiments merely allow the disclosure of the present invention to be complete and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims.

The terms used herein are used only to describe specific embodiments and are not intended to limit the present invention. For example, a component expressed in a singular should be understood as a concept including a plurality of components unless the context clearly means only the singular. In addition, in the specification of the present invention, terms such as 'include' or 'have' are only intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and such The use of the term does not exclude the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof. In addition, in the embodiments described in this specification, a 'module' or 'unit' may mean a functional part that performs at least one function or operation.

The term 'unit' or 'module' used in the present invention is software or ASICs (application specific integrated circuits), DSPs (digital signal processors), DSPDs (digital signal processing devices), PLDs (programmable logic devices), FPGAs (field means hardware components such as programmable gate arrays, processors, controllers, micro-controllers and microprocessors, etc. However, 'part' or 'module' refers to hardware and software The term 'unit' or 'module' may be configured to reside in an addressable storage medium, or may be configured to reproduce one or more processors. Thus, as an example, 'unit' or 'module' means components such as software components, object-oriented software components, class components and task components, and processes, functions, properties, procedures, subroutines, segments of program code; includes drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays and variables, etc. Components and the functionality provided within 'parts' or 'modules' are smaller numbers of components and 'units' ' or 'modules' or may be separated into additional components and 'parts' or 'modules'.

In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the specification of the present invention, it should be interpreted in an ideal or excessively formal meaning. doesn't happen

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, in the following description, if there is a risk of unnecessarily obscuring the gist of the present invention, detailed descriptions of well-known functions or configurations will be omitted.

1A and 1B are 5G Non-Standalone (NSA) for explaining a scenario in which a 5G (5th Generation) NR (New Radio) addition is performed in a 4G base station after the terminal connects to a 4G (4th Generation) network. ) is a diagram showing embodiments of network configuration diagrams. It should be recognized that the 5G NSA network shown in FIG. 1 does not include all components of the currently commercially available 5G NSA network, and thus may include more components than the illustrated components.

The 5G NSA network utilizes a 4G core network rather than a self-established core network, and the 4G core network is a Mobility Management Entity (MME) defined in 3GPP (3rd Generation Partnership Project) as shown in FIG. 114) and a Serving/Packet Data Network Gateway (SPGW, 116). As is known, the MME 114, which is a mobility management device, supports access to the network connection of the terminal 107, allocation of network resources, tracking, paging, roaming, handover, etc. It is equipment that performs signaling and control functions for, and the SPGW 116 is a call processing, signaling processing and data packet processing equipment. In the 5G NSA network, functions belonging to the control plane such as signaling are in charge of the 4G base station 112, and functions belonging to the user plane such as data traffic transmission are performed by the 4G base station 112 or 5G base station 121 It is structured to be processed by In the initial state in which the terminal 107 is connected to the 4G network, RRC (Radio Resource Control) signaling proceeds through a path from the 4G base station 112 to the MME 114 as shown by the dotted line in FIG. 1A, Transmission and reception of voice and data (LTE traffic) is performed through a path from the 4G base station 112 to the SPGW 116 as indicated by a solid line in FIG. 1A . The 4G base station 112 and the MME 114 are connected through an S1-C interface that is a control plane interface, and the 4G base station 112 and the SPGW 116 are connected through an S1-U interface that is a user plane interface.

In order to link the 5G base station 121 while transmitting LTE traffic in the initial state in which the terminal 107 is call-connected to the 4G network, the LTE traffic is stopped and a 5G NR addition procedure may be performed. The 5G NR additional configuration procedure may be performed by the 4G base station 112 receiving a measurement report (MR) from the terminal 107 . When the 5G NR additional configuration procedure is completed, the 5G base station 121 is interlocked, so that path switching for data traffic occurs. When path switching occurs, data traffic transmission/reception is performed through a path from the 5G base station 121 to the SPGW 116 as shown by a solid line in FIG. ) through the path leading to However, even when 5G NR additional configuration is completed, voice traffic transmission and reception are still performed through a path from the 4G base station 112 to the SPGW 116 as indicated by a solid line in FIG. 1A . In the state where 5G NR additional setting is completed, the 4G base station 112 and the 5G base station 121 are connected through the control plane interface X2-C interface and the user plane interface X2-U interface, and the 5G base station 121 and the SPGW ( 116) is connected through the S1-U interface, which is a user plane interface. When the 5G NR additional configuration is completed, the terminal 107 is in a dual connectivity (DC) operating state that can use the resources controlled by the two base stations 112 and 121 at the same time.

However, there is a problem with the implementation of the 5G NR additional establishment procedure, which is that it cannot be guaranteed that the 5G NR additional establishment procedure is always completed successfully. A problem in the terminal 107, a problem in the base stations 112 and 121, a problem in which incorrect information is input in a neighbor list, a list of neighboring base stations stored in the 4G base station 112, etc. Due to this, there may be cases where the 5G NR additional setup procedure fails. Since the 5G NR additional setup procedure is performed while the LTE traffic is stopped, if the 5G NR additional setup procedure fails, both LTE and 5G traffic are stopped. As a result of the 4G base station 112 retrying 5G NR additional configuration by receiving an additional measurement report from the terminal 107 again, there may be a case where the 5G NR additional configuration fails again. If the 5G NR additional setting procedure fails continuously, not only a terminal speed stop phenomenon occurs in which traffic is continuously stopped, but also due to frequent message transmission between the terminal 107 and the 4G base station 112, the battery of the terminal 107 is rapidly consumed, and this may lead to complaints. According to the disclosed technology, if the 5G NR additional configuration procedure fails once or multiple times in succession, the 5G NR additional configuration procedure is blocked for a certain period of time from being attempted again. Enables data transmission and reception. Accordingly, it is possible to avoid the occurrence of the terminal speed stop phenomenon as described above, as well as to improve the problem of fast consumption of the terminal battery.

2 is a diagram illustrating an embodiment of a flowchart for explaining a 5G NR additional configuration procedure.

As shown in FIG. 2 , the 5G NR additional configuration procedure starts from the step S205 of receiving a measurement report (MR) from the terminal 107 in the 4G base station 112, which is a master node. In order to perform this step, the 4G base station 112 carries measurement configuration information for event B1 measurement in an RRC connection reconfiguration message and delivers it to the terminal 107, 4G Receiving the RRC connection reconfiguration message including the event B1 report from the terminal 107 at the base station 112 and cells of the 5G base station adjacent to the terminal 107 in response to receiving the event B1 report at the 4G base station 112 The step of transmitting an RRC connection reconfiguration message instructing to perform measurement may be preceded. Here, the occurrence condition of the event B1 may be a condition in which the strength of a reference signal (RS) signal from a base station (eg, a 5G base station) belonging to a network different from the network to which the terminal is currently connected is greater than a threshold. Also, here, the measurement configuration information may include reference values required for the terminal 107 to report the event B1. In one embodiment, the 5G base station adjacent to the terminal 107 may be a DU (Digital Unit) in a radio access network (Radio Access Network) system. In an embodiment, the cells of the 5G base station may refer to geographic areas in which RUs (Radio Units) connected to the DU provide a service, respectively, but in the present specification, they simply refer to RUs for convenience of description. In this step, the measurement report (MR) received from the terminal 107 in the 4G base station 112 includes the measurement results for the cells of the 5G base station adjacent to the terminal 107 and the measured PCI (Physical Cell Identifier) of the 5G base station. can do. In step S210, the 4G base station 112 is added as a 5G base station 121 that is a secondary node and a 5G base station that manages the cells that have been measured in the measurement report (MR) received in step S205. A setup request (SgNB Addition Request) message may be transmitted. The additional configuration request message may be a message informing the user to prepare for resource configuration and/or allocation necessary for 5G NR additional configuration. In step S215 , the 4G base station 112 may receive a SgNB Addition Request Acknowledge message from the 5G base station 121 . Steps (S205) to (S215) described above correspond to preparation operations for additional configuration of 5G NR.

In step S220, the RRC connection reconfiguration message including configuration information for the 5G base station 121 is transmitted from the 4G base station 112 to the terminal 107. In step S225 , the 4G base station 112 receives an RRC Connection Reconfiguration Complete message, which is a confirmation message, from the terminal 107 . In step S230, a message (SgNB Reconfiguration Complete) notifying that the configuration on the terminal 107 side is completed is transmitted from the 4G base station 112 to the 5G base station 121 . In step S235, a random access procedure for performing configuration between the terminal 107 and the 5G base station 121 is performed. In step S240 , a message notifying the traffic transmission/reception status is transmitted from the 4G base station 112 to the 5G base station 121 according to the Packet Data Convergence Protocol (PDCP) protocol. In one embodiment, the message indicating the traffic transmission/reception status is an SN Status Transfer message, where the SN is a sequence number that identifies the last data among data transmitted through the 4G base station 112 so far. indicates. In step S245, the 4G base station 112 begins to forward data following the data identified by the sequence number SN to the 5G base station 121. In step S250, a path update procedure is performed. By performing this step, interworking with the 5G base station 121 is made, thereby causing path switching from the 4G base station 112 to the 5G base station 121 .

3 is a diagram illustrating an embodiment of a flowchart for explaining a method of blocking additional configuration of 5G NR according to the disclosed technology.

As shown in FIG. 3 , the 5G NR additional configuration blocking method according to the disclosed technology starts from the step S305 of receiving a measurement report (MR) from the terminal 107 . In step S310, the NR additional setting procedure is performed in response to receiving the measurement report (MR) from the terminal 107 . In this step, as described with reference to FIG. 2 , the terminal 107, the 5G base station 121 adjacent to the terminal 107, the MME 114 that works with the 5G base station 121, and the SPGW that works with the MME 114 In collaboration with (116), the NR additional setup procedure can be performed. In step S315, an NR additional configuration failure message is received from the terminal 107. In response to receiving the NR additional setup failure message in step S315, the NR release procedure is performed in step S320. In step S325 after performing step S315, additional NR setting is blocked in response to an additional measurement report received from the terminal for a predetermined time. According to this step, even if an additional measurement report (MR) is received from the terminal 107 for a selected time, the NR additional setting procedure may not be performed by blocking the NR additional setting. Even if the measurement report (MR) is received a plurality of times from the terminal 107 during the selected time, the NR additional setting procedure may not be performed. In one embodiment, the selected time is about 3 seconds. After the selected time has expired, an additional measurement report (MR) is received from the terminal 107 in step S330, and an additional 5G NR setting procedure is performed in step S335. When the 5G NR additional setting procedure is successfully performed and completed, interworking with the 5G base station 121 is established through the path from the 5G base station 121 to the SPGW 116, or from the 4G base station 112 to the 5G base station 121. Data traffic is transmitted/received through a path leading to the SPGW 116 via the . However, if the 5G NR additional setting procedure in step S335 fails, steps S315 to S325 are performed again and the NR additional setting is blocked for a predetermined time again. In this way, until the additional NR setting is successful, the additional NR setting is repeatedly blocked for a selected time, which can contribute to solving the problem of terminal speed degradation and premature battery exhaustion. In the above, the embodiment of blocking the NR additional setting for a predetermined time in response to receiving the NR additional setting failure message from the terminal 107 once has been described, but the NR additional setting failure message from the terminal 107 It should be appreciated that an embodiment in which the NR additional setting is blocked for a predetermined time in response to continuous reception for an arbitrary number of times, such as one time, is also possible, and such an embodiment also falls within the scope of the disclosed technology.

In the above description, the meaning of the description that a component is connected to or coupled to another component not only means that the component is directly connected or coupled to the other component, but also means that one or more other components are interposed therebetween. It should be understood to include the meaning that may be connected or coupled via an element. In addition, terms for describing the relationship between the elements (eg, 'between', 'between', etc.) should also be interpreted with similar meanings.

In the embodiments disclosed herein, the arrangement of the illustrated components may vary depending on the environment or requirements in which the invention is implemented. For example, some components may be omitted or some components may be integrated and implemented as one. Also, the arrangement order and connection of some components may be changed.

In the above, various embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and the above-described embodiments depart from the gist of the present invention as claimed in the appended claims. Without this, various modifications may be made by those of ordinary skill in the art to which the present invention pertains, and these modified embodiments should not be understood separately from the technical spirit or scope of the present invention. Accordingly, the technical scope of the present invention should be defined only by the appended claims.

107: terminal
112: 4G base station
114: MME
116: SPGW
121: 5G base station

Claims (16)

As a method of blocking 5G (5th Generation) NR (New radio) additional setting (addition),
Receiving a measurement report (measurement report) from the terminal,
allowing an NR additional configuration procedure to be performed in response to receiving the measurement report from the terminal;
Receiving an NR additional configuration failure message from the terminal;
allowing an NR release procedure to be performed in response to receiving the NR additional configuration failure message from the terminal; and
Blocking additional NR configuration in response to an additional measurement report received from the terminal for a predetermined time,
In the step of blocking the additional NR configuration in response to the additional measurement report received from the terminal for the predetermined time, the NR additional configuration procedure is not performed in response to the additional measurement report received from the terminal for the predetermined time. 5G NR additional setting blocking method, including the step of not.
The method of claim 1,
The method is performed by a 4G base station, 5G NR additional configuration blocking method.
The method of claim 1,
Receiving a measurement report from the terminal comprises:
Receiving an event B1 report from the terminal;
transmitting a message instructing to perform measurement on cells of a 5G base station adjacent to the terminal in response to receiving the event B1 report, and
5G NR additional configuration blocking method comprising the step of receiving a measurement report including measurement results for cells of a 5G base station adjacent to the terminal from the terminal.
4. The method of claim 3,
The 5G base station adjacent to the terminal is a DU (Digital Unit) in a radio access network (Radio Access Network), and the cells of the 5G base station are RUs (Radio Units) connected to the DU, 5G NR additional configuration blocking method.
According to claim 1,
The step of performing the NR additional configuration procedure in response to receiving the measurement report from the terminal includes the terminal, a 5G base station adjacent to the terminal, a mobility management device interworking with the 5G base station, and interworking with the mobility management device 5G NR additional configuration blocking method, comprising the step of performing an NR additional configuration procedure in cooperation with a gateway device.
6. The method of claim 5,
The mobility management device is a Mobility Management Entity (MME) defined in 3GPP (3rd Generation Partnership Project), and the gateway device is a Serving/Packet Data Network Gateway (SPGW) defined in 3GPP, 5G NR additional configuration blocking method.
delete According to claim 1,
5G NR additional configuration blocking method, further comprising the step of controlling the NR additional configuration procedure to be performed in response to the additional measurement report received from the terminal after the expiration of the predetermined time.
As a method of blocking additional configuration of 5G NR in a 4th generation (4G) base station,
Continuously receiving an NR additional setting failure message from the terminal a predetermined number of times, and
Blocking additional NR settings in response to the measurement report received from the terminal for a predetermined time,
The step of blocking the NR additional configuration in response to the measurement report received from the terminal for a predetermined time includes not performing the NR additional configuration procedure in response to the measurement report received from the terminal for the predetermined time , How to block additional settings for 5G NR.
10. The method of claim 9,
The step of continuously receiving the NR additional configuration failure message from the terminal a predetermined number of times comprises:
(i) receiving a measurement report from the terminal;
(ii) allowing the NR additional establishment procedure to be performed;
(iii) receiving an NR additional configuration failure message from the terminal;
(iv) allowing an NR release procedure to be performed; and
(v) repeating the steps (i) to (iv) for the predetermined number of times, 5G NR additional setting blocking method.
11. The method of claim 10,
Step (i) of receiving the measurement report from the terminal,
Receiving an event B1 report from the terminal;
transmitting a message instructing to perform measurement on cells of a 5G base station adjacent to the terminal in response to receiving the event B1 report, and
5G NR additional configuration blocking method comprising the step of receiving a measurement report including measurement results for cells of a 5G base station adjacent to the terminal from the terminal.
12. The method of claim 11,
A 5G base station adjacent to the terminal is a DU in a radio access network, and cells of the 5G base station are RUs connected to the DU.
11. The method of claim 10,
In the step (ii) of allowing the NR additional configuration procedure to be performed, the NR additional configuration is performed in cooperation with the terminal, a 5G base station adjacent to the terminal, a mobility management device interworking with the 5G base station, and a gateway device interworking with the mobility management device 5G NR additional configuration blocking method, comprising the step of performing a procedure.
14. The method of claim 13,
5G NR additional configuration blocking method, wherein the mobility management device is an MME defined in 3GPP, and the gateway device is an SPGW defined in 3GPP.
delete 10. The method of claim 9,
5G NR additional configuration blocking method, further comprising the step of controlling the NR additional configuration procedure to be performed in response to the additional measurement report received from the terminal after the expiration of the predetermined time.

Images