5G-R Functional Addressing Method

Abstract

The present invention provides a 5G-R functional addressing method, which follows the original GSM-R functional number call process and dialing method, adds a 5G-R terminal number segment analysis function, realizes functional number point-to-point calls based on the 5G-R network and functional number calls based on location addressing, has the least impact on the existing network services, is easy to implement in engineering, also conforms to the original management and dialing habits, and is relatively independent of the MCX system, without affecting the evolution of subsequent networks and services. It is a reasonable transition scheme suitable for the coexistence period of the dual networks.

Description

Technical Field

[0001] The present invention relates to the field of 5G communication technologies, and specifically to a 5G-R functional addressing method. Background Art

[0002] The 5G-R communication system is the next-generation railway mobile communication system based on 5G. The 5G-R communication system uses MCX to carry railway-customized services. The FRMCS plan will not conduct a pilot test until 2022 / 2023. The relevant functional aliases, interoperability with GSM-R, multicast methods, and other protocol standards are planned under 3GPP R18. At present, the Chinese railway plan is 1 to 2 years ahead of FRMCS. During the test period, it is urgent to implement various services originally carried by GSM-R under the pilot station.

[0003] Functional addressing means that users can be addressed by the functional roles they assume at that time, rather than the numbers of the terminal devices they use. In the existing GSM-R communication system, a 4-bit short number location addressing method is adopted. The processing flow is as Figure 1 shown. After receiving the cdpa (called party number), first determine the length of the called party number. If the length is not 4, a normal call is made. If the number length is 4, receive the CGI, query whether the data is a new cdpa. If it is new, record the cdpa. If not, report an error. Summary of the Invention

[0004] In order to solve the problems of the existing technology, the present invention provides a 5G-R functional addressing method, which follows the original GSM-R function number call process and dialing method, realizes the function number point call based on the 5G intelligent network and the function number call based on location addressing, has the least impact on the existing network services, is easy to implement in engineering, also conforms to the original management and dialing habits, and is relatively independent of the MCX system, without affecting the evolution of subsequent networks and services. It is a reasonable transition scheme suitable for the coexistence period of the two networks.

[0005] The present invention includes the following steps:

[0006] 1) Determine whether the called party number is a functional number service access code. If not, perform a normal VONR flow. If so, enter step 2);

[0007] 2) Determine whether the called party number is a group call broadcast service. If so, release the call. If not, enter step 3);

[0008] 3) Determine whether the called party number is a 4-bit short number location addressing. If not, transfer it to the FFN database in the 5G intelligent network for analysis and processing by the IM-SSF. If so, enter step 4);

[0009] 4) Determine through the MO-LR process whether the called party number matches the function number of the corresponding position. If not, release the call. If yes, query the called number through the FFA database in the GSM-R network and transfer IM-MGW to the GSM-R network for paging.

[0010] Further improvement, the specific process of the MO-LR process described in step 4) is as follows:

[0011] 4.1) The UE module initiates a service request to the NG-RAN module and the AMF module;

[0012] 4.2) Uplink NAS transmission of MO-LR request between UE module and AMF module;

[0013] 4.3) AMF module performs LMF selection;

[0014] 4.4) The AMF module determines the Nlmf position of the LMF module;

[0015] 4.5) UE positioning is performed between the UE module and the LMF module;

[0016] 4.6) The LMF module performs Nlmf position response to the AMF module;

[0017] 4.7) The AMF module makes an Ngmlc location update request to the VGMLC module;

[0018] 4.8) The VGMLC module makes a Ngmlc location update request to the HGMLC module;

[0019] 4.9) The HGMLC module provides location information to the external Client module, the VGMLC module sends the Ngmlc location update notification to the NEF module, and the Nnef location update notification is sent between the NEF module and the AF module;

[0020] 4.10) The external Client module confirms the location information with the HGMLC module, the NEF module and the AF module send Nnef location update notification responses, and the NEF module sends Ngmlc location update notification responses to the HGMLC module;

[0021] 4.11) Ngmlc location update notification response between HGMLC module and VGMLC module;

[0022] 4.12) The VGMLC module sends the Ngmlc location update notification response to the AMF module;

[0023] 4.13) Downlink NAS transmission of MO-LR response between UE module and AMF module;

[0024] As a further improvement, the FFA database in the GSM-R network is synchronized with the FFN database in the 5G intelligent network, and a table of dispatching desks and station attendants' numbers corresponding to each addressing location is maintained.

[0025] The beneficial effects of the present invention are as follows: the original GSM-R function number call process and dialing method are followed to realize the function number point call based on 5G intelligent network and the function number call based on location addressing, which has the least impact on the existing network services, is easy to implement in engineering, conforms to the original management and dialing habits, is relatively independent of the MCX system, does not affect the subsequent evolution of the network and services, and is a reasonable transition solution suitable for the coexistence of dual networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic diagram of the existing GSM-R function addressing process.

[0027] Figure 2 It is a schematic diagram of the functional addressing flow of the present invention.

[0028] Figure 3 This is a schematic diagram of the MO-LR process. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The process of the present invention is as follows Figure 2 As shown, the following steps are included:

[0031] 1) Determine whether the called party number is a functional number service access code, if not, proceed to normal VONR flow, if yes, proceed to step 2);

[0032] 2) Determine whether the called party number is a group call broadcast service, if so, release the call, if not, proceed to step 3);

[0033] 3) Determine whether the called party number is addressed by a 4-digit short number location. If not, the IM-SSF transfers the data to the FFN database in the 5G intelligent network for analysis and processing. If so, proceed to step 4);

[0034] 4) Determine through the MO-LR process whether the called party number matches the function number of the corresponding position. If not, release the call. If yes, query the called number through the FFA database in the GSM-R network and transfer IM-MGW to the GSM-R network for paging.

[0035] Step 4) The MO-LR process is as follows Figure 3 As shown, the specific process is as follows:

[0036] 4.1) The UE module initiates a service request to the NG-RAN module and the AMF module;

[0037] 4.2) The UE module transmits the MO-LR request in the uplink NAS to the AMF module;

[0038] 4.3) The AMF module selects the LMF;

[0039] 4.4) The AMF module performs Nlmf location determination on the LMF module;

[0040] 4.5) UE positioning is performed between the UE module and the LMF module;

[0041] 4.6) The LMF module performs an Nlmf location response to the AMF module;

[0042] 4.7) The AMF module sends an Ngmlc location update request to the VGMLC module;

[0043] 4.8) The VGMLC module sends an Ngmlc location update request to the HGMLC module;

[0044] 4.9) The HGMLC module provides location information to the external Client module. The VGMLC module sends an Ngmlc location update notification to the NEF module, and an Nnef location update notification is sent between the NEF module and the AF module;

[0045] 4.10) The external Client module confirms the location information to the HGMLC module. An Nnef location update notification response is sent between the NEF module and the AF module, and the NEF module sends an Ngmlc location update notification response to the HGMLC module;

[0046] 4.11) An Ngmlc location update notification response is performed between the HGMLC module and the VGMLC module;

[0047] 4.12) The VGMLC module sends an Ngmlc location update notification response to the AMF module;

[0048] 4.13) The UE module transmits the MO-LR response in the downlink NAS to the AMF module;

[0049] For further improvement, the FFA database in the GSM-R network is synchronized with the FFN database in the 5G intelligent network, and the dispatcher and station operator number table corresponding to each addressing location is maintained.

[0050] The full names of the abbreviations in the text are as follows:

[0051] 5G-R Next-generation railway mobile communication system based on 5G;

[0052] GSM-R Railway mobile communication system;

[0053] MCX Mission Critical Communication Mission Critical Communication;

[0054] FFN Follow me Function Node, Follow me Function Node;

[0055] FFA Follow me function alias, follow me function alias;

[0056] AMF Access and Mobility Management Function Access and Mobility Management Function;

[0057] LMF Location Management Function Location Management Function;

[0058] vGMLC visit Gateway Mobile Location Centre Visit Gateway Mobile Location Centre;

[0059] HGMLC Home Gateway Mobile Location Centre Home Gateway Mobile Location Centre;

[0060] NEF Network Exposure Function Network Exposure Function;

[0061] AF application function Application function;

[0062] MO-LR Mobile Originated Location Request Mobile Originated Location Request;

[0063] VONR Voice over new radio 5G Voice;

[0064] IM-SSF IP Multimedia Service Switching Function IP Multimedia Service Switching Function;

[0065] Nlmf N Location Management Function Location Management Function Reference Point;

[0066] Ngmlc N Gateway Mobile Location Centre Gateway Mobile Location Centre Reference;

[0067] Nnef N Network Exposure Function Network Open Function Reference Point.

[0068] The specific application scenarios of the present invention are numerous. The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A 5G-R functional addressing method, characterized in that The following steps are involved: 1) Determine whether the called party number is a functional number service access code. If not, proceed to the normal 5G voice VONR flow. If yes, proceed to step 2); 2) Determine whether the called party number is a group call broadcast service, if so, release the call, if not, proceed to step 3); 3) Determine whether the called party number is addressed by a 4-digit short number location. If not, the multimedia service switching function IM-SSF transfers the data to the functional node FFN database in the 5G intelligent network for analysis and processing. If so, proceed to step 4); 4) Determine whether the called party number matches the function number of the corresponding location through the mobile initiated location query MO-LR process. If not, release the call. If yes, query the called number through the function pseudonym FFA database in the railway mobile communication system GSM-R network, and transfer the multimedia gateway IM-MGW to the GSM-R network for paging; The specific process of the MO-LR process described in step 4) is as follows: 4.1) The user equipment terminal UE module initiates a service request to the next generation radio access network or 5G radio access network NG-RAN module and the access and mobility management function AMF module; 4.2) The uplink non-access layer NAS transmits the MO-LR request between the UE module and the AMF module; 4.3) The AMF module performs location management function LMF selection; 4.4) The AMF module determines the location of the reference point Nlmf for the location management function of the LMF module; 4.5) UE positioning is performed between the UE module and the LMF module; 4.6) The LMF module performs Nlmf position response to the AMF module; 4.7) The AMF module makes a request to the visited gateway mobile location center VGMLC module for the gateway mobile location center reference Ngmlc location update; 4.8) The VGMLC module makes a Ngmlc location update request to the HGMLC module; 4.9) The HGMLC module provides location information to the external Client module, the VGMLC module sends the Ngmlc location update notification to the network open function NEF module, and the Nnef location update notification is sent between the NEF module and the application function AF module; 4.10) The external Client module confirms the location information to the home gateway mobile location center HGMLC module, the network open function NEF module and the AF module send the network open function reference point Nnef location update notification response, and the NEF module sends the Ngmlc location update notification response to the HGMLC module; 4.11) Ngmlc location update notification response between HGMLC module and VGMLC module; 4.12) The VGMLC module sends the Ngmlc location update notification response to the AMF module; 4.13) Downlink NAS transmission MO-LR response between UE module and AMF module.

2. The 5G-R function addressing method according to claim 1, wherein: The FFA database in the GSM-R network is synchronized with the FFN database in the 5G intelligent network.

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