CN114363912A

CN114363912A - Data transmission method, system, computer device and storage medium of heterogeneous network

Info

Publication number: CN114363912A
Application number: CN202111682061.7A
Authority: CN
Inventors: 曹青; 陈冯; 史啸
Original assignee: Tianyi IoT Technology Co Ltd
Current assignee: Tianyi IoT Technology Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-15
Also published as: WO2023125436A1

Abstract

The invention discloses a data transmission method, a system, a computer device and a storage medium of a heterogeneous network, wherein the data transmission method of the heterogeneous network comprises the steps of carrying out naming design on DNN or APN information so as to anchor the DNN or APN information to a certain region, carrying out data transmission in the heterogeneous network according to the named DNN or APN information, and the like. The data transmission method of the heterogeneous network, provided by the invention, anchors the DNN or APN information to a certain region by naming the DNN or APN information, and can effectively transmit data of a user terminal under various heterogeneous network scenes, thereby supporting normal use of functions such as 4G/5G interoperation and returning to a home province/region from a roaming place. The invention is widely applied to the technical field of communication networks.

Description

Data transmission method, system, computer device and storage medium of heterogeneous network

Technical Field

The present invention relates to the field of communications network technologies, and in particular, to a data transmission method, system, computer device, and storage medium for a heterogeneous network.

Background

5G is a major revolution of communication networks, with the continuous advance of new infrastructure strategies, the traditional private network technology is difficult to meet the requirement of information service scenes of enterprise networks which are different day by day, the requirement of utilizing the 5G network technology to realize transformation upgrading is more urgent in the industry, the information characteristics and the requirement of different industries are different, a 5G public network cannot well meet the requirement of different networks of different application scenes in the industry, a customer urgently needs a customizable 5G private network to meet the requirement of diversified complex services of the customer, such as supporting service isolation, supporting 4/5G interoperation, supporting different routing transmission schemes such as roaming and attribution, and the 5G network can realize the routing isolation of client service flows in different industries and meet the requirement of different services by deploying independent customized DNN/APN configuration for the customer.

In an environment where 4/5G interoperation and roaming exists, a 5G user terminal faces a heterogeneous network when accessing a network. The heterogeneous network scenario includes: (1) the 5G user terminal accesses in a roaming province 5G signal coverage area and returns to the network scene of the home province/area outgoing through routing; (2) the 5G user terminal accesses the local (attribution province) 5G signal coverage area and directly goes out through the local network scene; (3) the 5G user terminal is accessed in an area where no 5G base station exists in roaming province or 5G signal coverage is not good, and returns to the network scene of the exit of the attribution province/area through routing; (4) the 5G user terminal is accessed in an area without a 5G base station or with poor 5G signal coverage in a local (home province) and directly goes out through a local network scene. In a heterogeneous network scenario, data of a ue may not be effectively transmitted, which mainly includes that the ue cannot support 4G/5G interoperability, and cannot support a roaming return to a home province/region.

Interpretation of terms:

4G: is an abbreviation of 4th Generation, i.e., fourth Generation mobile communication system;

5G: is an abbreviation of 5th Generation, i.e., fifth Generation mobile communication system;

DNN: is an abbreviation of Data Network Name, namely a Data Network Name;

APN: is an abbreviation of Access Point Name, i.e., Access Point Name;

NF, is an abbreviation of Network Function, i.e. Network Function;

AMF: is an abbreviation of Access and Mobility Management Function, i.e. Access and Mobility Management functions;

NRF: is an abbreviation of Network repeatability Function, namely Network warehousing Function;

SMF: is an abbreviation of Session Management Function, i.e. Session Management Function;

TA: is an abbreviation of Timing Advance, i.e., Timing Advance;

TAI: is an abbreviation of Tracking Area identity, i.e. Tracking Area identification code;

PLMN: is an abbreviation of Public Land Mobile Network, i.e. Public Land Mobile Network;

MME: is an abbreviation of Mobility Management Entity;

DNS: is an abbreviation of Domain Name Server, namely Domain Name resolution service;

UPF: is an abbreviation for User Plane Function, i.e., User Plane Function;

GW: is an abbreviation for Gateway, i.e. Gateway;

SGW: is an abbreviation of Serving GateWay, i.e. Serving GateWay.

Disclosure of Invention

The invention aims to provide a data transmission method, a data transmission system, a computer device and a storage medium of a heterogeneous network, aiming at least one technical problem that data of a user terminal cannot be effectively transmitted in the current 5G communication technology under the scene of the heterogeneous network.

In one aspect, an embodiment of the present invention includes a data transmission method for a heterogeneous network, including:

carrying out naming design on DNN or APN information so as to anchor the DNN or APN information to a certain region;

and carrying out data transmission in the heterogeneous network according to the named DNN or APN information.

Further, the naming design for the DNN or APN information to anchor the DNN or APN information to a certain region includes:

and adding a region label corresponding to the certain region to a DNN or APN template of the 5G user terminal to obtain the named DNN or APN information.

Further, when the 5G user terminal roams in the roaming area through the 5G base station and is routed back to the home area for outgoing, the data transmission is performed in the heterogeneous network according to the named DNN or APN information, including:

the AMF network element of the roaming area sends discovery request information to a first LNRF network element of the roaming area; the discovery request information comprises PLMN information, slice information, TA information and the DNN information;

the first LNRF network element forwards the discovery request information to a second LNRF network element of the home region through an HNRF network element;

the second LNRF network element queries and obtains the information of the SMF network element of the home region according to the discovery request information; the SMF network element has the access capability according to the DNN information under the TA information;

the second LNRF network element returns the information and the indication information of the SMF network element to the first LNRF network element; the indication information is used for indicating that the SMF network element does not meet TAI position conditions;

the AMF network element starts a DNN multi-time query function, and initiates an i-SMF network element discovery query to the first LNRF network element after the indication information is received for the first time;

the first LNRF network element returns the information of the i-SMF network element of the roaming area to the AMF network element according to the information of the SMF network element;

the i-SMF network element selects an i-UPF network element of the roaming area according to the PLMN information, the slice information and the TA information;

the i-SMF network element is communicated with the SMF network element, the i-UPF network element is communicated with the UPF network element in the home region, and a transmission channel from the 5G user terminal to a client side network is established;

and transmitting the 5G user terminal service data through the transmission channel.

Further, when the 5G user terminal accesses through the 5G base station in the home region, the performing data transmission in the heterogeneous network according to the named DNN or APN information includes:

the AMF network element sends discovery request information to the LNRF network element; the discovery request information comprises PLMN information, slice information, TA information and the DNN information;

the LNRF network element queries and obtains the information of the SMF network element according to the discovery request information; the SMF network element has the access capability according to the DNN information under the TA information;

the LNRF network element returns the information of the SMF network element to the AMF network element;

the SMF network element returns the information of the UPF network element to the AMF network element;

establishing a transmission channel from the 5G user terminal to a client side network through the UPF network element;

and adding a region label and an SMF group identifier corresponding to a certain region to an APN template of a 5G user terminal falling back to a 4G network from the 5G network to obtain the named DNN information.

Further, when the 5G user terminal roams in the roaming area through the 4G base station and is routed back to the home area for outgoing, the data transmission is performed in the heterogeneous network according to the named DNN or APN information, including:

the MME network element of the roaming region sends discovery request information to a first DNS network element of the roaming region; the discovery request information comprises the APN information;

the first DNS network element analyzes the discovery request information according to a DNS analysis rule and returns the information of the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway of the home region to the MME network element; the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway both have the access capability according to the APN information under the TA information;

the SGW network element of the roaming area is communicated with the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway respectively, and a transmission channel from the 5G user terminal to a client side network is established;

Further, when the 5G user terminal accesses through the 4G base station in the home area, the data transmission is performed in the heterogeneous network according to the named DNN or APN information, including:

the MME network element sends discovery request information to the DNS network element; the discovery request information comprises the APN information;

the DNS network element analyzes the discovery request information according to a DNS analysis rule and returns the information of the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway to the MME network element; the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway both have the access capability according to the APN information under the TA information;

the SGW network element is communicated with the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway respectively to establish a transmission channel from the 5G user terminal to a client side network;

On the other hand, the embodiment of the present invention further includes a data transmission system of a heterogeneous network, where the data transmission system of the heterogeneous network includes:

a first module; the first module is used for naming DNN or APN information so as to anchor the DNN or APN information to a certain region;

a second module; and the second module is used for carrying out data transmission in the heterogeneous network according to the named DNN or APN information.

In another aspect, an embodiment of the present invention further includes a computer apparatus, including a memory and a processor, where the memory is configured to store at least one program, and the processor is configured to load the at least one program to perform the data transmission method of the heterogeneous network in the embodiment.

In another aspect, the present invention further includes a storage medium in which a processor-executable program is stored, and the processor-executable program is used to execute the data transmission method of the heterogeneous network in the embodiment when executed by a processor.

The invention has the beneficial effects that: in the data transmission method of the heterogeneous network in the embodiment, the DNN or APN information is named and designed to be anchored to a certain region, so that the data of the user terminal can be effectively transmitted in various heterogeneous network scenes, and normal use of functions such as 4G/5G interoperation and returning to a home province/region from a roaming place is supported.

Drawings

Fig. 1 is a schematic diagram illustrating a data transmission method of applying a heterogeneous network to a first heterogeneous network scenario according to an embodiment;

fig. 2 is a schematic diagram illustrating a data transmission method of applying a heterogeneous network to a second heterogeneous network scenario in an embodiment;

fig. 3 is a schematic diagram illustrating a data transmission method of applying a heterogeneous network to a third heterogeneous network scenario in an embodiment;

fig. 4 is a schematic diagram illustrating a data transmission method using a heterogeneous network for a fourth heterogeneous network scenario in the embodiment.

Detailed Description

In this embodiment, the data transmission method for the heterogeneous network includes the following steps:

s1, carrying out naming design on DNN or APN information so as to anchor the DNN or APN information to a certain region;

and S2, carrying out data transmission in the heterogeneous network according to the named DNN or APN information.

In this embodiment, the heterogeneous network includes the following four scenarios:

(1) roaming access of 5G user through 5G base station

In this scenario, the 5G subscriber accesses in the coverage area of the roaming province 5G signal and returns to the network scenario of the home province/region outgoing through routing, that is, the 5G subscriber accesses through 5G gbb, AMF, i-SMF, i-UPF in province a (roaming province), and returns to the network architecture of the 5G core network UPF outgoing in province B (home province).

(2) Local access of 5G user through 5G base station

In this scenario, the 5G subscriber accesses in the local (home province) 5G signal coverage area, and routes directly to the network architecture that the a province UPF is out of via the local direct out-going network scenario, i.e., the 5G subscriber accesses in the a province (home province) via the 5G gbb, AMF, SMF.

(3) Roaming access of 5G user through 4G base station

In this scenario, a 5G user accesses in a region where roaming province has no 5G base station or 5G signal coverage is not good, and returns to a network scenario where the 5G user is out of home province/region through routing, that is, the 5G user accesses through 4G eNB, MME, i-SMF, i-UPF in province a (roaming province), and routes back to a network architecture where a 5G core network UPF in province B (home province) is out of home province.

(4) Local access of 5G user through 4G base station

Under the situation, a 5G user accesses to a local (home province) area without a 5G base station or with poor 5G signal coverage, and the 5G user accesses to a network architecture of a local province 5G core network UPF through a local directly outgoing network scene, namely, the 5G user accesses to the local province 5G core network UPF through a 4G eNB base station, an MME and an SMF in the province a (home province).

Under the above four scenarios, the scenarios (1) and (2) can be classified into one category, that is, the scenario where the 5G user accesses through the 5G base station, and the scenarios (3) and (4) can be classified into one category, that is, the scenario where the 5G user accesses through the 4G base station. Therefore, the data transmission method for the heterogeneous network in this embodiment may respectively describe two types of scenarios. In this embodiment, the dimensions of the regions are provinces, and roaming provinces and home provinces are referred to as roaming provinces and home provinces, respectively.

Scene of first, 5G user accessing through 5G base station

For the 5G user accessing via the 5G base station, the (1) th and (2) th scenarios, in step S1, the DNN information is named to anchor the DNN information to a certain area; in step S2, data transmission is performed in the heterogeneous network according to the named DNN information.

When step S1 is executed, that is, the step of naming the DNN or APN information to anchor the DNN or APN information to a certain area, the following steps may be specifically executed:

S101A, adding a region label corresponding to a certain region to a DNN or APN template of the 5G user terminal to obtain named DNN or APN information.

In step S101A, a certain region may be a provincial region, a region composed of several provinces, or a region of another scale. For example, a certain region may be a provincial region such as Anhui province, or a region of Jianghu Shanghai. The DNN information after naming may have a format of "enterprise code. area tag. iot" after adding an area tag corresponding to a certain area to the DNN template of the 5G subscriber terminal, wherein the "area tag" may be represented by a symbol corresponding to a place name, for example, "ah" when a certain area is anhui, and "jzh" when a certain area is zhejiang and zhe.

For the scenario (1), that is, the 5G ue roams in the roaming area through the 5G bs and then routes the access back to the home area and goes out, when step S2 is executed, that is, the step of data transmission in the heterogeneous network is performed according to the named DNN or APN information, the following steps may be specifically executed:

S201A, an AMF network element of a roaming area sends discovery request information to a first LNRF network element of the roaming area; the discovery request information comprises PLMN information, slice information, TA information and DNN information;

S202A, the first LNRF network element forwards the discovery request information to a second LNRF network element in the home region through the HNRF network element;

S203A, the second LNRF network element queries and obtains the information of the SMF network element of the home region according to the discovery request information; the SMF network element has the access capability according to the DNN information under the TA information;

S204A, the second LNRF network element returns the information and the indication information of the SMF network element to the first LNRF network element; the indication information is used for indicating that the SMF network element does not meet the TAI position condition;

S205A, the AMF network element starts a DNN multi-time query function, and after the indication information is received for the first time, i-SMF network element discovery query is initiated to the first LNRF network element;

S206A, the first LNRF network element returns the information of the i-SMF network element of the roaming area to the AMF network element according to the information of the SMF network element;

the method comprises the following steps that an S207A.i-SMF network element selects an i-UPF network element of a roaming area according to PLMN information, slice information and TA information;

S208A.i-SMF network element is communicated with SMF network element, i-UPF network element is communicated with UPF network element in home region, and transmission channel from 5G user terminal to client side network is established;

S209A, transmitting the 5G user terminal service data through a transmission channel.

The principle of steps S201A-S209A is shown in FIG. 1.

In the scenario of (1), the roaming province and the home province are different provinces, the roaming province is provided with network elements such as an AMF network element, a first LNRF network element, an i-SMF network element and an i-UPF network element, the home province is provided with network elements such as an SMF network element, an UPF network element and a second LNRF network element, and the operator is provided with network elements such as a UDM network element, a PCF network element and an HNRF network element in a cross-province.

In step S201A, the AMF network element sends discovery request information to the first LNRF network element (i.e., the LNRF network element set in the roaming province), where the discovery request information includes PLMN information, slice information, TA information, and DNN information named in step S1. In step S202A, if the first LNRF network element can directly discover an SMF network element in the home province that has an access capability to DNN information under the corresponding TA information (for example, access to a certain region pointed by a region tag in the DNN information), the first LNRF network element can directly return the information of the SMF network element to the AMF network element; if the first LNRF network element cannot find the SMF network element having the access capability to the DNN information under the corresponding TA information in the home province, the first LNRF network element forwards the discovery request information to the second LNRF network element in the home region through the HNRF network element, step S203A is executed, and the second LNRF network element queries the SMF network element having the access capability to the DNN information under the corresponding TA information in the home province according to the discovery request information.

In step S204A, after the second LNRF network element discovers the SMF network element, the second LNRF network element returns information of the SMF network element and indication information to the first LNRF network element, where the indication information may be preferredtimetchind ═ false, and the indication information may indicate that the discovered SMF network element does not satisfy the TAI location condition.

In step S205A, the AMF network element starts a DNN multi-query function, and after receiving the indication information preferredtimechind ═ false for the first time, carries PLMN information, slice information, and TA information, and initiates a discovery query of the i-SMF network element (i.e., anchor insertion SMF network element) to the first LNRF network element. In step S206A, the first LNRF network element returns the information of the i-SMF network element with the plug-in function in the roaming area to the AMF network element according to the registration information of the SMF network element. In step S207A, the i-SMF network element selects an i-UPF network element in the roaming area according to the PLMN information, the slice information, and the TA information.

In step S208A, referring to fig. 1, the i-SMF network element in roaming province is intercommunicated with the SMF network element in home province, the i-UPF network element in roaming province is intercommunicated with the UPF network element in home province, and a transmission channel from the 5G user terminal to the client side network is established.

In step S209A, referring to fig. 1, when the 5G user terminal is accessed to the 5G base station gNB, the transmission of the service data of the 5G user terminal may be performed through a transmission channel formed by the intercommunication between the i-SMF network element and the intercommunication between the i-UPF network element and the UPF network element, and specifically, the service data generated by the 5G user terminal may be routed from the roaming province to the home province and sent to the client side network, and the service data sent by the client side network to the 5G user terminal is an opposite path, thereby ensuring the normal service use of the 5G user terminal.

In scenario (1), the first and second LNRF network elements do not need to be configured, and the HNRF network elements are configured with rules that each province is forwarded to each home province based on the province label iot.

For the scenario (2), that is, the 5G user terminal accesses through the 5G base station in the home zone, when step S2 is executed, that is, the step of performing data transmission in the heterogeneous network according to the named DNN or APN information, the following steps may be specifically executed:

S201B, the AMF network element sends discovery request information to the LNRF network element; the discovery request information comprises PLMN information, slice information, TA information and DNN information;

S202B, the LNRF network element queries and obtains the information of the SMF network element according to the discovery request information; the SMF network element has the access capability according to the DNN information under the TA information;

S203B, the LNRF network element returns the information of the SMF network element to the LNRF network element;

S204B, the SMF network element returns the information of the UPF network element to the AMF network element;

S205B, establishing a transmission channel from the 5G user terminal to a client side network through a UPF network element;

and S206B, transmitting the service data of the 5G user terminal through the transmission channel.

The principle of steps S201B-S206B is shown in FIG. 2.

In scenario (2), the roaming province and the home province are the same (it can also be understood that the 5G user terminal is only used in the home province and does not roam away from the home province), and this province is provided with network elements such as an AMF network element, an LNRF network element, an SMF network element, and a UPF network element, and the operator is provided with network elements such as a UDM network element and a PCF network element at the 2B control node.

In step S201B, the AMF network element sends discovery request information to the LNRF network element, where the discovery request information includes PLMN information, slice information, TA information, and DNN information named in step S1.

In step S202B, the LNRF network element may directly discover the SMF network element in the home province that has the access capability to the DNN information (for example, access to a certain region pointed by the region tag in the DNN information) under the corresponding TA information, and the LNRF network element returns the information of the SMF network element to the AMF network element.

In step S203B and step S204B, the LNRF network element returns the information of the SMF network element to the AMF network element, and the SMF network element returns the information of the UPF network element to the AMF network element.

In step S205B, referring to fig. 2, a transmission path from the 5G user terminal to the client network is established through the UPF network element.

In step S206B, referring to fig. 2, when the 5G user terminal is accessed to the 5G base station gNB, the service data of the 5G user terminal may be transmitted through the transmission channel formed by the UPF network element, specifically, the service data generated by the 5G user terminal may be sent to the client-side network through the UPF network element, and the service data sent by the client-side network to the 5G user terminal is an opposite path, thereby ensuring normal service use of the 5G user terminal.

In scenario (2), the LNRF network element does not need to be configured, and each DNN message configured in the province (e.g., the province shown in fig. 2) is automatically registered with the LNRF network element.

Scene of second and 5G users accessing through 4G base station

For the 5G user access scenario through the 4G base station, i.e., (3) and (4), in step S1, naming the APN information to anchor the APN information to a certain area; in step S2, data transmission is performed in the heterogeneous network according to the named APN information.

and S101B, adding a region label and an SMF group identifier corresponding to a certain region to an APN template of a 5G user terminal falling back to a 4G network from the 5G network, and obtaining the named DNN information.

In step S101B, a certain region may be a provincial region, a region composed of several provinces, or a region of another scale. For example, a certain region may be a provincial region such as Anhui province, or a region of Jianghu Shanghai. The DNN information after naming may have a format of "enterprise code. area tag. iot" after adding an area tag corresponding to a certain area to the DNN template of the 5G subscriber terminal, wherein the "area tag" may be represented by a symbol corresponding to a place name, for example, "ah" when a certain area is anhui, and "jzh" when a certain area is zhejiang and zhe.

In step S101B, an APN OI is introduced into a 4G APN template of a 5G user fallback 4G to obtain named APN information, which may have a format such as "SMF group identity, province label, iot, mnc011, mcc460, gprs". In step S101B, the specification of the SMF group id is shown in table 1. The programmable SMF group is identified as smfg1, and other scenarios are customized as needed.

TABLE 1

SMF component classification	SMF group identity naming
		Set 1 SMF of 2B	smfg1
Set 2B of SMF groups	Smfg2
		Set n of SMF of 2B	smfgn

For the scenario (3), that is, the 5G ue roams in the roaming area through the 4G base station and is routed back to the home area and goes out, when step S2 is executed, that is, the step of data transmission in the heterogeneous network is performed according to the named DNN or APN information, the following steps may be specifically executed:

S201C, the MME network element of the roaming region sends discovery request information to a first DNS network element of the roaming region; the discovery request information includes APN information;

S202C, the first DNS network element analyzes the discovery request information according to a DNS analysis rule, and returns the information of the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway of the home region to the MME network element; the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway both have the access capability according to the APN information under the TA information;

S203C, SGW network elements of the roaming area are communicated with an SMF/GW-C fusion gateway and a UPF/GW-U fusion gateway respectively, and a transmission channel from a 5G user terminal to a client side network is established;

and S204C, transmitting the service data of the 5G user terminal through the transmission channel.

The principle of steps S201C-S204C is shown in FIG. 3.

In the scenario (3), the roaming province and the home province are different provinces, the roaming province is provided with network elements such as an MME (mobility management entity) network element, a first DNS (domain name system) network element and an SGW (gateway) network element, the home province is provided with network elements such as an SMF (short message gateway), an UPF (unified Power flow) network element and a second DNS (Domain name System) network element, wherein the SMF network element is arranged in a SMF/GW-C (Universal Serial bus/gateway-gateway) -C fusion gateway form, the UPF network element is arranged in a UPF/GW-U fusion gateway form, and an operator is provided with network elements such as an UDM (Universal data management Module) network element, a PCF network element and a root DNS network element in a trans-province manner.

In step S201C, the MME network element sends discovery request information to the first DNS network element (i.e., the DNS network element set in the roaming province), where the discovery request information includes the APN information named in step S1.

In step S202C, the first DNS network element parses the discovery request information according to the DNS parsing rule, and if the first DNS network element can directly discover an SMF/GW-C convergence gateway having an access capability to the APN information (for example, accessing to a certain region pointed by a region tag in the APN information) in the home province, the first DNS network element can directly return information of the SMF/GW-C convergence gateway to the MME network element; if the first DNS network element cannot find the SMF network element with the APN information access capability in the home province, the first DNS network element can forward the discovery request information to the root DNS network element, the second DNS network element of the home province is inquired through a mode of transferring the root DNS network element, the information of the SMF/GW-C fusion gateway and the information of the UPF/GW-U fusion gateway are inquired by the second DNS network element, and the information of the SMF/GW-C fusion gateway and the information of the UPF/GW-U fusion gateway are returned to the MME network element.

In step S203C, referring to fig. 3, the SGW network element in roaming province is communicated with the SMF/GW-C convergence gateway and the UPF/GW-U convergence gateway in home province, respectively, to establish a transmission channel from the 5G user terminal to the client side network.

In step S204C, referring to fig. 3, when the 5G user terminal is accessed to the 4G base station eNB, the transmission of the service data of the 5G user terminal may be performed through a transmission channel formed by the interworking between the SGW network element and the SMF/GW-C convergence gateway and the interworking between the SGW network element and the UPF/GW-U convergence gateway, and specifically, the service data generated by the 5G user terminal may be routed from the roaming province to the home province and sent to the client-side network, and the service data sent by the client-side network to the 5G user terminal is an opposite path, thereby ensuring normal service use of the 5G user terminal.

In scenario (3), for the root DNS network element, rules are configured for each province based on the province label iot.

For the scenario (4), that is, the 5G user terminal accesses through the 4G base station in the home zone, when step S2 is executed, that is, the step of performing data transmission in the heterogeneous network according to the named DNN or APN information, the following steps may be specifically executed:

S201D, the MME network element sends discovery request information to the DNS network element; the discovery request information includes APN information;

S202D, the DNS network element analyzes the discovery request information according to the DNS analysis rule, and returns the information of the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway to the MME network element; the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway both have the access capability according to the APN information under the TA information;

S203D, SGW network element is communicated with SMF/GW-C fusion gateway and UPF/GW-U fusion gateway respectively, and a transmission channel from 5G user terminal to client side network is established;

and S204D, transmitting the service data of the 5G user terminal through the transmission channel.

The principle of steps S201D-S204D is shown in FIG. 3.

In scenario (4), the roaming province and the home province are the same (it can also be understood that the 5G user terminal is only used in the home province and does not roam away from the home province), and this province is provided with network elements such as an MME network element, a DNS network element, an SGW network element, an SMF network element (set in the form of an SMF/GW-C convergence gateway) and an UPF network element (set in the form of an UPF/GW-U convergence gateway), and the operator is provided with network elements such as an UDM network element and a PCF network element at a 2B control node.

In step S201D, the MME network element sends discovery request information to the DNS network element, where the discovery request information includes the APN information named in step S1.

In step S202D, the DNS network element may directly discover the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway in the home province that have access capability to the APN information (e.g., access to a certain region pointed by the region tag in the APN information), and return the information of the SMF/GW-C fusion gateway and the UPF/GW-U fusion gateway to the MME network element.

In step S203D, referring to fig. 2, the interworking between the SGW network element and the SMF/GW-C convergence gateway and the interworking between the SGW network element and the UPF/GW-U convergence gateway establish a transmission channel from the 5G user terminal to the client side network.

In step S204D, referring to fig. 2, when the 5G user terminal is accessed to the 4G base station eNB, the service data of the 5G user terminal may be transmitted through a transmission channel formed by the interworking between the SGW network element and the SMF/GW-C convergence gateway and the interworking between the SGW network element and the UPF/GW-U convergence gateway, and specifically, the service data generated by the 5G user terminal may be transmitted to the client side network through the SMF/GW-C convergence gateway or the UPF/GW-U convergence gateway, and the service data transmitted by the client side network to the 5G user terminal is an opposite path, thereby ensuring normal service usage of the 5G user terminal.

As can be seen from the descriptions of the scenarios (1), (2), (3), and (4), the data transmission method of the heterogeneous network in this embodiment can effectively transmit data of the user terminal in various scenarios of the heterogeneous network by naming DNN or APN information to anchor the DNN or APN information to a certain area, thereby supporting normal use of functions such as 4G/5G interworking and returning to home province/region from roaming. The data transmission method of the heterogeneous network in the embodiment has small configuration amount and can be flexibly expanded, and the requirements of 5G users on returning to the affiliated service scenes under various heterogeneous network scenes such as 4G access, 5G access and the like can be simultaneously met; the home region can be anchored to a specific province and a specific region such as Jianghu and Zhejiang Hui; because the data transmission method of the heterogeneous network in the embodiment can effectively transmit the data of the user terminal in the scene of the roaming heterogeneous network, the data transmission method of the heterogeneous network in the embodiment can meet the application requirements of characteristics that 'a plurality of communicators are involved, and different communicators are in different regions, so that at least one communicator is in a roaming state' and the like in the 5G project, such as the application requirements of industries of electric meters, water meters, child watches, car networking and the like based on the internet of things; because the data transmission method of the heterogeneous network in this embodiment can effectively transmit the data of the user terminal in the presence of the heterogeneous network accessing the 5G network through the 4G base station, the data transmission method of the heterogeneous network in this embodiment can meet the service availability requirement of effective transmission in the 5G project when part of the area with poor 5G signals is accessed through the 4G base station, and broadens the application range of the 5G technology.

In this embodiment, the data transmission method of the heterogeneous network may be executed by a data transmission system of the heterogeneous network. The data transmission system of the heterogeneous network comprises a first module and a second module, wherein the first module is used for executing the step S1 in the data transmission method of the heterogeneous network, namely, the step of naming DNN or APN information to anchor the DNN or APN information to a certain region; the second module is configured to execute step S2 in the data transmission method for the heterogeneous network, that is, perform data transmission in the heterogeneous network according to the named DNN or APN information.

In particular, the first and second modules may be hardware modules, software modules, or a combination of hardware and software modules having respective functions. By operating the data transmission system of the heterogeneous network, the data transmission method of the heterogeneous network can be executed, thereby achieving the technical effect of the data transmission system of the heterogeneous network executing the data transmission method of the heterogeneous network in the embodiment.

The data transmission method of the heterogeneous network in the embodiment may be implemented by writing a computer program for executing the data transmission method of the heterogeneous network in the embodiment, writing the computer program into a computer device or a storage medium, and executing the data transmission method of the heterogeneous network in the embodiment when the computer program is read out and run, thereby achieving the same technical effect as the data transmission method of the heterogeneous network in the embodiment.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.

It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.

Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.

Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.

A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.

Claims

1. A data transmission method of a heterogeneous network is characterized by comprising the following steps:

2. The method of claim 1, wherein the naming DNN or APN information to anchor to a region comprises:

3. The method of claim 2, wherein when the 5G ue roams in a roaming area through a 5G bs and is routed back to a home location and goes out of the home location, the performing data transmission in the heterogeneous network according to the named DNN or APN information comprises:

4. The data transmission method of claim 2, wherein when the 5G ue accesses through the 5G bs in the home area, the data transmission in the heterogeneous network according to the named DNN or APN information comprises:

5. The method of any of claims 1-4, wherein the naming the DNN or APN information to anchor the DNN or APN information to a region comprises:

6. The method of claim 5, wherein when the 5G ue roams in a roaming area through a 4G bs and is routed back to a home location and goes out of the home location, the performing data transmission in the heterogeneous network according to the named DNN or APN information comprises:

7. The data transmission method of claim 5, wherein when the 5G ue accesses through a 4G base station in a home area, the performing data transmission in the heterogeneous network according to the named DNN or APN information comprises:

8. A data transmission system of a heterogeneous network, the data transmission system of the heterogeneous network comprising:

9. A computer apparatus comprising a memory for storing at least one program and a processor for loading the at least one program to perform the data transmission method of the heterogeneous network of any one of claims 1 to 7.

10. A storage medium in which a processor-executable program is stored, wherein the processor-executable program, when executed by a processor, is configured to perform the data transmission method of the heterogeneous network according to any one of claims 1 to 7.