US-12621787-B2 - Network node and communication method for recovery of user data repository (UDR)

US12621787B2US 12621787 B2US12621787 B2US 12621787B2US-12621787-B2

Abstract

A network node includes: a transmission unit configured to register a terminal to a UDR (User Data Repository); a reception unit configured to receive, from the UDR, information for identifying the UDR as a response to registration of the terminal; and a control unit configured to associate the terminal and the information for identifying the UDR with a first time at which the terminal is registered to the UDR to be stored. In a case where an error indication of the UDR is received by the reception unit, the control unit determines whether or not a re-registration of the terminal is needed, based on a time included in the error indication and the first time.

Inventors

Atsushi MINOKUCHI
Shin Nishida
Yuko UKAWA
Hiroshi Ishikawa

Assignees

NTT DOCOMO, INC.

Dates

Publication Date: 20260505
Application Date: 20210215

Claims (2)

1 . A network node comprising: a transmitter configured to register information of a terminal to a User Data Repository (UDR); a receiver configured to receive, from the UDR, a response to registration of the information of the terminal, and a processor configured to associate the response to the registration of the information of the terminal with a first point in time at which the information of the terminal is registered to the UDR and to store the response and the associated first point in time, wherein the receiver is configured to receive an error notification of the UDR that includes a second point in time at which mirroring with a backup is performed by the UDR and a third point in time, the third point in time being after an occurrence of the error, at which the UDR is recovered to a state resulting from performing mirroring based on the backup, the error notification indicating potential data inconsistency in the UDR, and wherein the processor is configured to determine that a re-registration operation of the terminal is required in response to the first point in time being equal to or later than the second point in time and being equal to or earlier than the third point in time.
2 . A communication method executed by a network node, the method comprising: registering information of a terminal to a User Data Repository (UDR); receiving, from the UDR, a response to registration of the information of the terminal; and associating the response to the registration of the information of the terminal with a first point in time at which the information of the terminal is registered to the UDR, and storing the response and the associated first point in time, wherein the network node receives an error notification of the UDR that includes a second point in time at which mirroring with a backup is performed by the UDR and a third point in time, the third point in time being after an occurrence of the error, at which the UDR is recovered to a state resulting from performing mirroring based on the backup, the error notification indicating potential data inconsistency in the UDR, and wherein the network node determines that a re-registration operation of the terminal is required in response to detecting that the first point in time is equal to or later than the second point in time and that the first point in time is equal to or earlier than the third point in time.

Description

FIELD OF THE INVENTION The present invention relates to a network node and a communication method in a communication system. BACKGROUND OF THE INVENTION In 3GPP (3rd Generation Partnership Project), in order to achieve further larger system capacity, further faster data transmission speed, further lower latency in a wireless communication section, etc., a wireless communication method called 5G or NR (New Radio) has been discussed (hereinafter, the wireless communication method is referred to as “5G” or “NR”). In 5G, various wireless technologies have been discussed in order to meet requirements including latency equal to or less than 1 ms in a wireless section while realizing a throughput equal to or greater than 10 Gbps. In NR, an architecture has been discussed which includes: 5GC (5G Core Network) corresponding to EPC (Evolved Packet Core) that is a core network in an LTE (Long Term Evolution) network architecture; and NG-RAN (Next Generation Radio Access Network) corresponding to E-UTRAN (Evolved Universal Terrestrial Radio Access Network) that is a RAN (Radio Access Network) in the LTE network architecture (e.g., non-patent document 1). CITATION LIST Non-Patent Document [Non-Patent Document 1] 3GPP TS 23.501 V15.9.0 (2020-03) SUMMARY OF THE INVENTION Technical Problem In the 5G core network, in a case where the subscriber profile information is mismatched, the function for correcting the mismatched profile information has not been standardized. As a result, in a case where the subscriber profile information is mismatched, there is a case in which services based on the latest contract information or location information cannot be provided. The present invention has been made in view of the foregoing and is intended to cause the subscriber profile information to be matched in the network. Solution to Problem According to the disclosed technique, a network node is provided. The network node includes: a transmission unit configured to register a terminal to a UDR (User Data Repository); a reception unit configured to receive, from the UDR, information for identifying the UDR as a response to registration of the terminal; and a control unit configured to associate the terminal and the information for identifying the UDR with a first time at which the terminal is registered to the UDR to be stored. In a case where an error indication of the UDR is received by the reception unit, the control unit determines whether or not a re-registration operation of the terminal is needed, based on a time included in the error indication and the first time. Advantageous Effects of Invention According to the disclosed technique, it is possible to cause the subscriber profile information to be matched in the network. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a drawing illustrating an example of a communication system. FIG. 2 is a drawing illustrating an example of a communication system under a roaming environment. FIG. 3 is a drawing illustrating an example (1) of a mismatch of profile information. FIG. 4 is a drawing illustrating an example (2) of a mismatch of profile information. FIG. 5 is a drawing illustrating an example (3) of a mismatch of profile information. FIG. 6 is a drawing illustrating an example (1) of a communication system in an embodiment of the present invention. FIG. 7 is a drawing illustrating an example (2) of a communication system in an embodiment of the present invention. FIG. 8 is a sequence diagram illustrating an example (1) of updating profile information in an embodiment of the present invention. FIG. 9 is a sequence diagram illustrating an example (2) of updating profile information in an embodiment of the present invention. FIG. 10 is a drawing illustrating an example of a functional structure of a base station 10 in an embodiment of the present invention. FIG. 11 is a drawing illustrating an example of a functional structure of a terminal 20 in an embodiment of the present invention. FIG. 12 is a drawing illustrating an example of a hardware structure of the base station 10 and the terminal 20 in an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, referring to the drawings, one or more embodiments of the present invention will be described. It should be noted that the embodiments described below are examples. Embodiments of the present invention are not limited to the following embodiments. In operations of a wireless communication system according to an embodiment of the present invention, conventional techniques will be used appropriately. With respect to the above, for example, the conventional techniques are related to, but not limited to, the existing LTE. Further, it is assumed that the term “LTE” used in the present specification has, unless otherwise specifically mentioned, a broad meaning including a scheme of LTE-Advanced and a scheme after LTE-Advanced (e.g., NR), or wireless LAN (Local Area Network). Further, in an embodi