CN114286401A

CN114286401A - Method, system and base station for determining global base station identifier of shared base station

Info

Publication number: CN114286401A
Application number: CN202011043419.7A
Authority: CN
Inventors: 刘胜楠; 蒋峥; 陈鹏; 佘小明
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2022-04-05

Abstract

The disclosure provides a method, a system and a base station for determining a global base station identifier of a shared base station, and relates to the technical field of communication. In the disclosure, a PLMN ID list and Cell IDs in a system broadcast message SIB1 of a base station are received, the Cell IDs include a gNB ID, and then, according to the order of the respective PLMN IDs in the PLMN ID list, a PLMN ID for generating an NCGI is determined, and accordingly, a PLMN ID for generating a global base station identity is specified. The global base station identification is accurately determined based on the pre-specified PLMN ID, the global base station identification can uniquely identify one base station, and the terminal equipment can be accurately switched to the target base station, so that the problem that the terminal equipment cannot be accurately positioned to the base station or even successfully switched to the target base station in the switching process based on the NG interface due to the fact that a selection rule of the PLMN ID is not clear in a 3GPP protocol can be solved.

Description

Method, system and base station for determining global base station identifier of shared base station

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method, a system, and a base station for determining a global base station identifier of a shared base station.

Background

In a wireless Network sharing scenario, a shared base station is shared by multiple operators, may broadcast a Public Land Mobile Network Identity (PLMN ID) list of all operators, and may logically support multiple NR Cell Global identities (NCGIs, also referred to as Cell IDs). During the process of NG interface establishment, handover and the like, the shared base station can be uniquely determined by the two identifiers (namely PLMN ID and Cell ID), namely, the unique global base station identification of the shared base station can be determined by utilizing the PLMN ID and the Cell ID. The shared base station may be, for example, a New Radio (NR) base station.

In the 3GPP protocol TS 38.300, the definition of Global gbb ID only states that the PLMN in Global gbb ID and the PLMN ID in NCGI are consistent. However, the selection of the PLMN constituting the NCGI is not specified in the definition of the NCGI. In a radio network Sharing (RAN Sharing) scenario, one NR base station may be shared by multiple operators, the NR logically should support multiple global base station identities (global gbb IDs), a shared physical cell needs to broadcast PLMN IDs of all operators, and logically support multiple NR cell global identities NCGIs.

Disclosure of Invention

The inventor finds that, in the related art, when an NR base station is shared by multiple operators, since a PLMN selection rule constituting a Global gbb ID is ambiguous, if a Cell ID is determined, PLMN IDs selected by different executing parties are different, and base stations determined according to the PLMN ID and the Cell ID are different, so that one base station cannot be accurately identified, which may cause a problem that a handover to a target base station cannot be performed in a handover process based on an NG interface.

Therefore, the method for accurately determining the global base station identifier of the shared base station is provided.

In the embodiment of the present disclosure, a PLMN ID list and a Cell ID in a system broadcast message SIB1 of a base station are received, the Cell ID includes a base station identity gNB ID, and then, according to an order of the respective PLMN IDs in the PLMN ID list, a PLMN ID for generating an NCGI is determined, and accordingly, a PLMN ID for generating a global base station identity is specified. The global base station identification is accurately determined based on the pre-specified PLMN ID, the global base station identification can uniquely identify one base station, and the terminal equipment can be accurately switched to the target base station, so that the problem that the terminal equipment cannot be accurately positioned to the base station or even successfully switched to the target base station in the switching process based on the NG interface due to the fact that a selection rule of the PLMN ID is not clear in a 3GPP protocol can be solved.

According to some embodiments of the present disclosure, there is provided a method for determining a global base station identity of a shared base station, including: determining PLMN IDs (public land Mobile network) for generating NR Cell Global Identity (NCGI) according to the sequence of the PLMN IDs in a public land Mobile network identity (PLMN ID) list in a system broadcast message SIB1 of a first base station; and determining the global base station identification of the first base station according to the base station identification gNB ID contained in the Cell ID in the SIB1 of the first base station and the PLMN ID used for generating the NCGI.

In some embodiments, the method is performed by a first base station, the method further comprising: and the first base station sends the determined global base station identification of the first base station to a core network element.

In some embodiments, the second base station receives a PLMN ID list and a Cell ID of the first base station sent by the terminal device, where the PLMN ID list and the Cell ID of the first base station are obtained by the terminal device by monitoring a SIB1 message broadcast by the first base station, the SIB1 message includes the PLMN ID list and the Cell ID of the first base station, and the Cell ID includes a gNB ID; the second base station determines the PLMN ID used for generating the NCGI according to the sequence of each PLMN ID in the PLMN ID list; and the second base station determines the global base station identification of the first base station according to the PLMN ID and the gNB ID used for generating the NCGI.

In some embodiments, the second base station receives a PLMN ID list and a Cell ID of the first base station sent by the terminal device, where the PLMN ID list and the Cell ID of the first base station are obtained by the terminal device by monitoring a SIB1 message broadcast by the first base station, the SIB1 message includes the PLMN ID list and the Cell ID of the first base station, and the Cell ID includes a gNB ID;

the second base station determines the PLMN ID used for generating the NCGI according to the sequence of each PLMN ID in the PLMN ID list;

the second base station determines the global base station identification of the first base station as a target base station according to the PLMN ID and the gNB ID used for generating the NCGI;

and the second base station sends the global base station identifier of the first base station as the target base station to the core network element, so that the core network element determines that the global base station identifier of the target base station sent by the second base station is consistent with the global base station identifier of the first base station sent by the first base station in the switching process based on the NG interface.

In some embodiments, when the second base station is ready to switch the terminal device to the first base station, the second base station sends the global base station identifier of the first base station to the core network element through a Handover request Handover signaling.

In some embodiments, determining the PLMN ID for generating the NCGI according to the order of the respective PLMN IDs in the PLMN ID list comprises: the first PLMN ID of each operator in the PLMN ID list is taken as the PLMN ID used for generating the NCGI.

In some embodiments, the core network element comprises an AMF.

According to still further embodiments of the present disclosure, there is provided a base station including: a memory; and a processor coupled to the memory, the processor configured to perform the method of determining a shared base station global base station identity of any of the embodiments based on instructions stored in the memory.

In accordance with still other embodiments of the present disclosure, there is provided a system for determining a global base station identity, including:

the first base station is configured to determine a PLMN ID for generating an NCGI according to an order of each PLMN ID in a PLMN ID list in a system broadcast message SIB1 of the first base station, determine a global base station identifier of the first base station according to a gNB ID included in a Cell ID in a system broadcast message SIB1 of the first base station and the PLMN ID for generating the NCGI, and send the global base station identifier of the first base station to a core network element;

the second base station is configured to receive a PLMN ID list and a Cell ID of the first base station, the PLMN ID list and the Cell ID of the first base station are sent by the terminal equipment and are obtained by monitoring a SIB1 message broadcasted by the first base station, the SIB1 message comprises the PLMN ID list and the Cell ID of the first base station, the Cell ID comprises a gNB ID, the PLMN ID used for generating the NCGI is determined according to the sequence of the PLMN IDs in the PLMN ID list, the global base station identity of the first base station serving as a target base station is determined according to the PLMN ID and the gNB ID used for generating the NCGI, and the global base station identity of the first base station serving as the target base station is sent to the core network element, so that the core network element determines that the global base station identity of the target base station sent by the second base station is consistent with the global base station identity of the first base station sent by the first base station in an NG-based interface switching process.

And the core network element is configured to receive the global base station identifier sent by the first base station and the global base station identifier of the target base station sent by the second base station, and determine that the global base station identifier of the target base station sent by the second base station is consistent with the global base station identifier of the first base station sent by the first base station in the NG-based interface switching process.

According to still further embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of determining a shared base station global base station identity as set forth in any of the embodiments.

Drawings

The drawings that will be used in the description of the embodiments or the related art will be briefly described below. The present disclosure can be understood more clearly from the following detailed description, which proceeds with reference to the accompanying drawings.

It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without undue inventive faculty.

Fig. 1 illustrates a flow diagram of a method of determining a global base station identity in accordance with some embodiments of the present disclosure.

Fig. 2 shows a flow diagram of a method of determining a global base station identity according to further embodiments of the present disclosure.

Fig. 3 shows a flow diagram of a method of determining a global base station identity according to further embodiments of the present disclosure.

Fig. 4 illustrates a flow diagram of handover control based on a method of determining a global base station identity, according to some embodiments of the present disclosure.

Fig. 5 is a flow chart illustrating handover control based on a method of determining a global base station identity according to further embodiments of the present disclosure.

Fig. 6 illustrates a schematic diagram of a base station, in accordance with some embodiments of the present disclosure.

Fig. 7 illustrates a schematic diagram of a system to determine a global base station identity in accordance with some embodiments of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.

The descriptions of "first", "second", etc. in this disclosure are intended to refer to different objects, and are not intended to refer to the meaning of size or timing, etc., unless otherwise specified.

As shown in fig. 1, the method of this embodiment includes steps 110-120. The method of this embodiment may be performed by a core network element or a base station, for example.

In step 110, a PLMN ID for generating the NR cell global identity NCGI is determined according to the order of the respective PLMN IDs in the PLMN ID list of the public land mobile network identity in the system broadcast message SIB1 of the first base station.

The system broadcast message SIB1 of the first base station includes a public land mobile network identifier PLMN ID list and a Cell identifier Cell ID, where the Cell ID includes a base station identifier (gbnodeidentitydocument, gbb ID). The first base station may be, for example, an NR sharing base station.

In some embodiments, determining the PLMN ID for generating the NCGI according to the order of the respective PLMN IDs in the PLMN ID list comprises: the first PLMN ID in the PLMN ID list is used as the PLMN ID for generating the NCGI, or the last PLMN ID in the PLMN ID list may be used as the PLMN ID for generating the NCGI, or any PLMN ID in the middle of the PLMN ID list may be used as the PLMN ID for generating the NCGI.

The rules for determining the PLMN ID for generating the NCGI may be written in the 3GPP protocol TS 38.300, for example. Therefore, each base station can determine the PLMN ID for generating the NCGI according to the PLMN ID list according to the rule, and the selection rule of the PLMN ID in the NCGI and the global gNB ID is unified.

In step 120, the global base station identity of the first base station is determined according to the base station identity gNB ID contained in the Cell ID in the SIB1 of the first base station and the PLMN ID used for generating the NCGI.

The global base station identity may be uniquely identified by the PLMN ID and the gNB ID used to generate the NCGI. For example, if the PLMN ID used for generating the NCGI is PLMN 1 and the gNB ID is gNB 3, the determined global base station identifier is PLMN 1+ gNB 3.

In some embodiments, for example, when the NG interface between the core network element and the first base station is established, the first base station may send the determined global base station identifier of the first base station to the core network element. The core network element may be, for example, an Access and Mobility Management Function (AMF) network element.

In the above embodiment, the global base station identifier is accurately determined based on the pre-specified PLMN ID used for generating the NCGI, and the global base station identifier may uniquely identify one base station, so that a problem that the base station cannot be accurately identified due to no explicit PLMN ID selection rule in the 3GPP protocol can be avoided. In addition, the target base station can be accurately positioned through the global base station identification, so that the terminal equipment can be accurately switched to the target base station, and the problem that the terminal equipment cannot be accurately switched to the target base station in the switching process is solved.

As shown in FIG. 2, the method of this embodiment includes

steps

210 and 230.

In step 210, the first base station determines the PLMN ID for generating the NR cell global identity NCGI according to the order of the PLMN IDs in the PLMN ID list of the public land mobile network identity in the system broadcast message SIB1 of the first base station.

The first base station may be, for example, an NR sharing base station.

The method for determining the PLMN ID for generating the NCGI may be performed, for example, with reference to the method in step 110, and is not described herein again.

In step 220, the first base station determines the global base station identity of the first base station according to the base station identity gNB ID contained in the Cell ID in the SIB1 of the first base station and the PLMN ID used for generating the NCGI.

The method for determining the global base station identifier of the first base station may be performed, for example, with reference to the method in step 120, and is not described herein again.

In step 230, the first base station sends the determined global base station identifier of the first base station to a network element of a core network.

The core network element includes, for example, an AMF, and is not limited to the illustrated example.

In the above embodiment, the first base station may accurately determine the global base station identifier according to the SIB1 message (i.e., the gNB ID and the PLMN ID used for generating the NCGI), and the global base station identifier may uniquely identify one base station, so that a problem that the base station cannot be accurately identified due to the fact that the selection rule of the PLMN ID in the NCGI is not specified in the 3GPP protocol may be avoided. In addition, the target base station can be accurately positioned through the global base station identification, so that the terminal equipment can be accurately switched to the target base station, and the problem that the terminal equipment cannot be accurately switched to the target base station in the switching process is solved.

As shown in FIG. 3, the method of this embodiment includes step 310-350.

In step 310, the terminal device obtains the PLMN ID list and Cell ID of the first base station by monitoring the SIB1 message broadcast by the first base station, where the SIB1 message includes the PLMN ID list and Cell ID of the first base station, and the Cell ID includes the gNB ID.

The ue terminal device may be, for example, a ue (user equipment).

In step 320, the terminal device sends the obtained PLMN ID list and Cell ID of the first base station to the second base station.

For example, the terminal device may store the obtained PLMN ID list and Cell ID of the first base station in a measurement report, and send the measurement report to the second base station.

In step 330, the second base station receives the PLMN ID list and Cell ID of the first base station sent by the terminal device.

In step 340, the second base station determines the PLMN ID for generating the NCGI according to the order of the respective PLMN IDs in the PLMN ID list.

For example, the rules for determining the PLMN ID for generating the NCGI may be written in the 3GPP protocol TS 38.331. Thereby unifying the selection rule of the PLMN ID for generating the NCGI in the SIB1, so that each base station and core network element can determine the PLMN ID for generating the NCGI according to the rule.

In step 350, the second base station determines the global base station identity of the first base station according to the PLMN ID and the gNB ID used for generating the NCGI.

In the above embodiment, the second base station may accurately determine the unique global base station identifier of the first base station based on the SIB1 message information broadcast by the first base station and sent by the terminal device, where the global base station identifier may uniquely identify one first base station, so as to avoid a problem that the base station cannot be accurately identified due to no explicit PLMN ID selection rule in the 3GPP protocol. In addition, the target base station can be accurately positioned through the global base station identification, so that the terminal equipment can be accurately switched to the target base station, and the problem that the terminal equipment cannot be accurately switched from the source base station (namely, the second base station) to the target base station (namely, the first base station) in the switching process is solved.

As shown in FIG. 4, the method of this embodiment includes step 410-480.

In step 410, a PLMN ID for generating the NR cell global identity NCGI is determined according to the order of the respective PLMN IDs in the PLMN ID list of the public land mobile network identity in the system broadcast message SIB1 of the first base station.

In step 420, the global base station identity of the first base station is determined according to the base station identity gNB ID contained in the Cell ID in the SIB1 of the first base station and the PLMN ID used for generating the NCGI.

In step 430, the first base station sends the determined global base station identifier of the first base station to a network element of a core network.

In step 440, the second base station receives the PLMN ID list and Cell ID of the first base station sent by the terminal device, where the PLMN ID list and Cell ID of the first base station are obtained by the terminal device by monitoring the SIB1 message broadcast by the first base station, the SIB1 message includes the PLMN ID list and Cell ID of the first base station, and the Cell ID includes the gNB ID.

In step 450, the second base station determines the PLMN ID for generating the NCGI according to the order of the PLMN IDs in the PLMN ID list.

In the

above steps

410 and 450, the rule for determining the PLMN ID for generating the NCGI may be written in 3GPP protocol TS 38.300 and 3GPP protocol TS 38.331, respectively, for example. Therefore, a selection rule of the PLMN ID for generating the NCGI in the SIB1 and a selection rule of the PLMN ID for generating the NCGI in the Global base station identity Global gbnb ID are unified, so that each base station and each core network element can determine the PLMN ID for generating the NCGI according to the rules.

In step 460, the second base station determines the global base station identity of the first base station as the target base station according to the PLMN ID and the gNB ID used to generate the NCGI.

In step 470, the second base station sends the global base station identifier of the first base station as the target base station to the network element of the core network.

In some embodiments, the second base station (also referred to as a source base station) sends a handover request including the global base station identity of the first base station to the core network element when the terminal device is ready to handover to the first base station (also referred to as a target base station). For example, when the second base station cannot provide service for the terminal device, the second base station sends a handover request including the global base station identifier of the first base station to the core network element.

In step 480, the core network element receives the global base station identifier of the first base station sent by the first base station and the global base station identifier of the first base station as the target base station sent by the second base station, and switches the terminal device to the first base station based on the NG interface.

In the above embodiment, in an application scenario of a handover base station, in a manner of pre-specifying a PLMN ID, a base station corresponding to a unique global base station identifier determined according to information reported by a first base station (i.e., a target base station) and a base station determined according to a handover request of a second base station (i.e., a source base station) are kept consistent, so that a terminal device can be accurately handed over to the target base station.

As shown in fig. 5, the AMF 510, the base station 520, and the terminal device 530 are included. The ue terminal device may be, for example, a ue (user equipment).

The AMF is a core network element of an operator, and it is assumed that a PLMN ID list supported by the operator includes PLMN 1 and PLMN 2.

(1) When an NG interface between the AMF and the gNB2-1 is established, the gNB2-1 sends the global base station identification determined based on the PLMN ID and the Cell ID determined in the self SIB1 message for generating the NCGI to the AMF.

The gNB2-1 determines the LMN ID (i.e. PLMN 1) for generating the NCGI according to the PLMN ID list in the SIB1 message of the gNB2-1 itself, and determines the gNB ID (e.g. gNB 3) according to the Cell ID (i.e. Cell ID3) in the SIB1 message of the gNB2-1 itself, thereby generating a global base station identity, e.g. denoted as PLMN 1+ Cell ID 3.

Assume that the user equipment is currently served by gNB1-1, i.e., gNB1-1 is the source base station. The source base station gNB1-1 prepares to handover the user equipment to the target base station gNB 2-1.

(2) When the source base station gNB1-1 prepares to handover the user equipment to the target base station gNB2-1, first, the user equipment listens to the SIB1 message broadcast by the target base station gNB2-1, where the SIB1 message includes the PLMN ID list and Cell ID supported by the operator, i.e., the SIB1 message includes PLMN 1, PLMN 2, and Cell ID 3.

(3) Then, the UE saves the PLMN ID list and Cell ID supported by the operator in the monitored SIB1 message in a measurement report, and sends the measurement report to the source base station gNB 1-1.

(4) The source base station gNB1-1 selects an LMN ID (i.e., PLMN 1) for generating an NCGI from the received PLMN ID list, and determines a gNB ID (e.g., gNB 3) from the received Cell ID (i.e., Cell ID 3). The source base station determines the global base station identification (namely PLMN 1+ Cell ID3) of the target base station gNB2-1 according to the PLMN ID and the gNB ID used for generating the NCGI, and sends the global base station identification (PLMN 1+ Cell ID3) of the target base station to the network element of the core network.

(5) Finally, the AMF may determine that the received global bs ID of the target bs sent by the target bs is consistent with the global bs ID of the target bs sent by the source bs, that is, both are PLMN 1+ Cell ID3, and accordingly, the AMF may accurately switch the ue from the source bs gNB1-1 to the target bs whose global bs ID is corresponding to PLMN 1+ Cell ID 3.

As shown in fig. 6, the base station 600 of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610, the processor 620 being configured to perform the method of determining a global base station identity in any of the embodiments of the present disclosure performed by a base station based on instructions stored in the memory 610.

If the base station 600 is a target base station (i.e. a first base station), for example, the following method for determining the global base station identity may be performed: determining a PLMN ID for generating the NCGI according to the sequence of each PLMN ID in a PLMN ID list in a system broadcast message SIB1 of the first base station, determining a global base station identifier of the first base station according to a gNB ID contained in a Cell ID in a system broadcast message SIB1 of the first base station and the PLMN ID for generating the NCGI, and sending the global base station identifier of the first base station to a core network element.

If the base station 600 is a source base station (i.e. a second base station), the following method for determining the global base station identity may be performed, for example: receiving a PLMN ID list and a Cell ID of a first base station sent by a terminal device, wherein the PLMN ID list and the Cell ID of the first base station are obtained by monitoring an SIB1 message broadcasted by the first base station by the terminal device, the SIB1 message comprises the PLMN ID list and the Cell ID of the first base station, the Cell ID comprises a gNB ID, the PLMN ID used for generating an NCGI is determined according to the sequence of the PLMN IDs in the PLMN ID list, the global base station identification of the first base station serving as a target base station is determined according to the PLMN ID and the gNB ID used for generating the NCGI, and the global base station identification of the first base station serving as the target base station is sent to a core network element, so that the core network element determines that the global base station identification of the target base station sent by a second base station is consistent with the global base station identification of the first base station sent by the first base station in a switching process based on an NG interface.

Memory 610 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.

The base station 600 may also include an input-output interface 630, a network interface 640, a storage interface 650, and the like. These

interfaces

630, 640, 650 and the connections between the memory 610 and the processor 620 may be, for example, via a bus 660. The input/output interface 630 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as an SD card and a usb disk.

As shown in fig. 7, the system 700 for determining a global base station identifier of this embodiment includes: a first base station 710, a second base station 720 and a core network element 730.

The first base station 710 is configured, for example, to: the SIB1 message is broadcasted, wherein the SIB1 message includes a PLMN ID list and a Cell ID of the first base station, the Cell ID includes a gNB ID, the PLMN ID for generating the NCGI is determined according to an order of each PLMN ID in the PLMN ID list in the system broadcast message SIB1 of the first base station 710, the global base station identifier of the first base station 710 is determined according to the gNB ID included in the Cell ID in the system broadcast message SIB1 of the first base station 710 and the PLMN ID for generating the NCGI, and the global base station identifier of the first base station 710 is sent to the core network element 730.

The second base station 720 is configured, for example, to: receiving a PLMN ID list and a Cell ID of a first base station 710 sent by a terminal device, wherein the PLMN ID list and the Cell ID of the first base station 710 are obtained by the terminal device through monitoring a SIB1 message broadcasted by the first base station 710, the SIB1 message comprises the PLMN ID list and the Cell ID of the first base station 710, the Cell ID comprises a gNB ID, determining the PLMN ID used for generating an NCGI according to the sequence of the PLMN IDs in the PLMN ID list, determining the global base station identity of the first base station 710 as a target base station according to the PLMN ID and the gNB ID used for generating the NCGI, and sending the global base station identity of the first base station 710 as the target base station to a core network element 730, so that the core network element 730 determines that the global base station identity of the target base station sent by the second base station 720 is consistent with the global base station identity of the first base station 710 sent by the first base station 710 in an NG-based interface switching process.

The core network element 730 is configured, for example, to: receiving the global base station identifier sent by the first base station 710 and the global base station identifier of the target base station sent by the second base station 720, and determining that the global base station identifier of the target base station sent by the second base station 720 is consistent with the global base station identifier of the first base station 710 sent by the first base station 710 in the NG-based interface switching process.

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-non-transitory readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A method for determining a global base station identity of a shared base station, comprising:

determining PLMN IDs (public land Mobile network) for generating NR Cell Global Identity (NCGI) according to the sequence of the PLMN IDs in a public land Mobile network identity (PLMN ID) list in a system broadcast message SIB1 of a first base station;

and determining the global base station identification of the first base station according to the base station identification gNB ID contained in the Cell ID in the SIB1 of the first base station and the PLMN ID used for generating the NCGI.

2. The method of determining a shared base station global base station identity according to claim 1, the method being performed by a first base station, the method further comprising:

and the first base station sends the determined global base station identification of the first base station to a core network element.

3. The method of determining a shared base station global base station identity according to claim 1, the method comprising:

the second base station receives a PLMN ID list and a Cell ID of the first base station, which are sent by the terminal equipment, wherein the PLMN ID list and the Cell ID of the first base station are obtained by the terminal equipment through monitoring an SIB1 message broadcasted by the first base station, the SIB1 message comprises the PLMN ID list and the Cell ID of the first base station, and the Cell ID comprises a gNB ID;

and the second base station determines the global base station identification of the first base station according to the PLMN ID and the gNB ID used for generating the NCGI.

4. The method of determining a shared base station global base station identity of claim 2, the method further comprising:

5. The method of claim 4, wherein the second base station sends the global base station identifier of the first base station to the network element of the core network through a Handover request Handover signaling when the terminal device is to be handed over to the first base station.

6. The method of any of claims 1 to 5, wherein determining the PLMN IDs for generating the NCGI according to the order of the PLMN IDs in the PLMN ID list comprises:

the first PLMN ID of each operator in the PLMN ID list is taken as the PLMN ID used for generating the NCGI.

7. The method for determining a shared base station global base station identity according to claim 2 or 4, wherein the core network element comprises an access and mobility management function (AMF) network element.

8. A base station, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the method of determining a shared base station global base station identity of any of claims 1-7 based on instructions stored in the memory.

9. A system for determining a global base station identity, comprising:

the first base station is configured to broadcast an SIB1 message, wherein the message includes a PLMN ID list and a Cell ID of the first base station, the Cell ID includes a gNB ID, the PLMN ID used for generating the NCGI is determined according to the sequence of each PLMN ID in the PLMN ID list in a system broadcast message SIB1 of the first base station, a global base station identifier of the first base station is determined according to the gNB ID contained in the Cell ID in a system broadcast message SIB1 of the first base station and the PLMN ID used for generating the NCGI, and the global base station identifier of the first base station is sent to a core network element;

the second base station is configured to receive a PLMN ID list and a Cell ID of the first base station, which are sent by the terminal device, wherein the PLMN ID list and the Cell ID of the first base station are obtained by the terminal device through monitoring an SIB1 message broadcasted by the first base station, determine a PLMN ID used for generating an NCGI according to the sequence of each PLMN ID in the PLMN ID list, determine a global base station identifier of the first base station as a target base station according to the PLMN ID and the gNB ID used for generating the NCGI, and send the global base station identifier of the first base station as the target base station to the core network element.

10. A non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of determining a shared base station global base station identity of any of claims 1-7.