CN112449394B

CN112449394B - Data transmission method and core network equipment

Info

Publication number: CN112449394B
Application number: CN201910803610.8A
Authority: CN
Inventors: 魏群; 马瑞涛
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2022-09-16
Anticipated expiration: 2039-08-28
Also published as: CN112449394A

Abstract

The embodiment of the invention provides a data transmission method and core network equipment, relates to the technical field of communication, and solves the problem of how to establish a transmission channel between UE and UPF and ensure the lowest transmission delay of the transmission channel. The method comprises the steps that core network equipment acquires a service transfer point list and at least one piece of position information of UE; the service transfer point list comprises at least one service transfer point which can be connected by the UE; the core network equipment determines a first service transfer point according to the coverage range and the at least one piece of position information of each service transfer point; the core network equipment determines that a second service transfer point which provides service for the UE currently is different from a first service transfer point, and reestablishes the service bearer of the UE through the first service transfer point; wherein each service transit point corresponds to a coverage area.

Description

Data transmission method and core network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and a core network device.

Background

In a fifth generation mobile communication technology (5 th-generation, abbreviated as 5G) network architecture, an edge computing technology enables operators and third-party services to be deployed to access points close to User Equipment (UE), so that end-to-end delay and transmission network load are reduced, and more efficient service delivery is realized. The implementation principle is that a 5G core network selects a user plane function entity (UPF for short) close to UE, and service flow is directed to a local data network through an N6 interface on the UPF; in practical applications, a plurality of UPFs may be deployed in the same location, so that when the core network device selects a UPF serving the UE, there is a problem that the data transmission delay from the UE to the UPF is not the lowest.

Therefore, how to establish a transmission channel between the UE and the UPF and ensure that the transmission delay of the transmission channel is the lowest becomes an urgent problem to be solved.

Disclosure of Invention

Embodiments of the present invention provide a data transmission method and core network equipment, which solve the problem of how to establish a transmission channel between a UE and a UPF and ensure that the transmission delay of the transmission channel is the lowest.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a data transmission method, including: the method comprises the steps that core network equipment obtains a service transfer point list and at least one piece of position information of UE; the service transfer point list comprises at least one service transfer point which can be connected by the UE; the core network equipment determines a first service transfer point according to the coverage range and the at least one piece of position information of each service transfer point; the core network equipment determines that a second service transfer point which provides service for the UE currently is different from a first service transfer point, and reestablishes the service bearer of the UE through the first service transfer point; wherein each service transit point corresponds to a coverage area.

As can be seen from the foregoing solutions, in the data transmission method provided in the embodiments of the present invention, core network equipment obtains at least one piece of location information of a UE and a service transfer point list; the service transfer point list comprises at least one service transfer point which can be connected by the UE; the core network equipment determines a first service transfer point according to the coverage range and the at least one piece of position information of each service transfer point; the core network equipment determines that a second service transfer point which provides service for the UE currently is different from a first service transfer point, and reestablishes the service bearer of the UE through the first service transfer point; when the service transfer point is UPF, the core network equipment can determine which service transfer point to establish the service bearer of the UE in real time according to the position information of the UE, so that the transmission delay between the UE and the UPF is ensured; the problem of how to establish a transmission channel between the UE and the UPF and ensure the lowest transmission delay of the transmission channel is solved.

In a second aspect, an embodiment of the present invention provides a core network device, including: a receiving and sending unit, configured to obtain a service transfer point list and at least one piece of location information of the UE; the service transfer point list comprises at least one service transfer point which can be connected by the UE; the processing unit is used for determining a first service transfer point according to the coverage area of each service transfer point and at least one piece of position information acquired by the transceiving unit; the processing unit is further configured to reestablish a service bearer of the UE through the first service transfer point when it is determined that a second service transfer point currently providing a service for the UE is different from the first service transfer point; wherein each service transit point corresponds to a coverage area.

In a third aspect, an embodiment of the present invention provides a core network device, including: communication interface, processor, memory, bus; the memory is used for storing computer execution instructions, the processor is connected with the memory through the bus, and when the core network device runs, the processor executes the computer execution instructions stored in the memory, so that the core network device executes the method provided by the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform the method as provided in the first aspect above.

It can be understood that any core network device provided above is configured to execute the method according to the first aspect provided above, and therefore, the beneficial effects that can be achieved by the core network device may refer to the beneficial effects of the method according to the first aspect and the corresponding scheme in the following detailed description, which are not described herein again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a network architecture diagram of a data transmission method according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a PDU session establishment procedure in the prior art;

fig. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

fig. 4 is a second flowchart of a data transmission method according to an embodiment of the present invention;

fig. 5 is a table of a high service success rate set of a data transmission method according to an embodiment of the present invention;

fig. 6 is a third schematic flow chart of a data transmission method according to an embodiment of the present invention;

fig. 7 is a schematic coverage area diagram of a service transfer point of a data transmission method according to an embodiment of the present invention;

fig. 8 is a second schematic view illustrating a coverage area of a service transfer point of the data transmission method according to the embodiment of the present invention;

fig. 9 is a third schematic view illustrating a coverage area of a service transfer point of the data transmission method according to the embodiment of the present invention;

fig. 10 is a fourth flowchart illustrating a data transmission method according to an embodiment of the invention;

fig. 11 is a schematic diagram of a movement path of a data transmission method according to an embodiment of the present invention;

fig. 12 is a second schematic diagram of a moving path of the data transmission method according to the embodiment of the invention;

fig. 13 is a fifth flowchart illustrating a data transmission method according to an embodiment of the invention;

fig. 14 is a schematic diagram illustrating a deployment distance of a data transmission method according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a core network device according to an embodiment of the present invention;

fig. 16 is a second schematic structural diagram of a core network device according to an embodiment of the present invention.

Reference numerals:

core network equipment-10;

a transceiver unit-101; a processing unit-102.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used for distinguishing the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like are not limited in number or execution order.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "such as" in an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of networks refers to two or more networks.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, a/B denotes a or B.

The UE in the embodiment of the invention can be an intelligent mobile terminal, an unmanned aerial vehicle (UAV for short) or an intelligent automobile. The intelligent mobile terminal is a mobile terminal with an operating system. The intelligent mobile terminal can be: the smart mobile terminal may be a terminal device such as a smart phone, a tablet computer, a notebook computer, a super-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), a smart watch, a smart bracelet, or other types of smart mobile terminals, and embodiments of the present invention are not limited in particular.

The data transmission method provided by the embodiment of the invention is applied to the network architecture shown in fig. 1, and comprises the following steps: UE, a base station (called eNodeB for short), a radio access network (called RAN for short), an access and mobility management Function entity (called AMF for short), a session management Function entity (called SMF for short), a policy control Function entity (called PCF for short), a home subscriber server (called UDM for short), a target network (called destination network for short), an UPF and an Application Function (called AF for short); wherein, the RAN comprises a base station (English full name: evolved node B, abbreviated as eNodeB); as shown in fig. 2, when a UE establishes a Protocol Data Unit (PDU for short) session, the UE sends an NAS message to an AMF, which carries a PDU session establishment bearer request; secondly, AMF selects SMF based on request type, NSSAI and other information; thirdly, the AMF sends a PDU session establishment context request to the SMF; step four, SMF calls (user database Registration) Nudm _ UECM _ Registration to register the PDU Session in UDM; fifthly, the SMF returns (PDU session Context creation feedback) Nsmf _ PDUSESION _ CreateSSCONText Response carrying the Cause and (session management Context ID) SM Context ID to the AMF; sixthly, the SMF executes a PCF selection function; seventhly, the SMF executes (Session Management Policy Establishment) a Session Management Policy Establishment flow to acquire a default PCC rule for the PDU Session; eighthly, the SMF selects SSC Mode for PDU conversation, executes UPF selection and distributes IPv6 prefix for UE; ninthly, the SMF sends (an N4 interface Session Establishment bearing Request) an N4 Session Establishment Request message to the UPF; step ten, UPF responds (N4 interface Session Establishment Response) to SMF N4 Session Establishment Response message; step ten, the SMF initiates (Communication N1N2message transmission) Namf _ Communication _ N1N2MessageTRANsfer to the AMF, which carries the allocated IP address, QoS information, and (PDU Session Establishment Accept) PDU Session Establishment Accept; step ten, AMF sends (PDU Session Request of N2 interface) N2 PDU Session Request to RAN, carrying (PDU Session Establishment acceptance) PDU Session Establishment Accept; step thirteen, the RAN forwards the NAS message to the UE; fourteenth step, RAN sends (N2 interface PDU Session Response) N2 PDU Session Response to AMF, carrying (access network channel information) AN Tunnel Info; fifteenth step, AMF sends (PDU conversation content update Request) Nsmf _ PDUSESION _ UpdateSMContext Request to SMF; sixthly, the SMF sends (N4 carries Modification) N4 Session Modification to the UPF to provide AN tunnel info; seventeenth, the UPF returns (N4 carries a Modification Response) N4 Session Modification Response to the SMF; eighteenth, the SMF sends (PDU session content update Response) Nsmf _ PDUSESION _ UpdateSMContext Response (Cause) to the AMF; nineteenth step, the SMF sends (IPv6 routing broadcast) IPv6 Router Advertisement to the UE through UPF, thereby establishing PDU conversation between the UE and the AF.

When the eighth step is executed, a Session management function entity (SMF) selects a Session and Service Continuity Mode (SSC Mode) for the PDU Session, performs UPF selection, and allocates an IPv6(internet protocol version 6) prefix to the UE, the core network selects a nearby UPF to provide a Service to the UE; however, in practical applications, multiple UPFs may be deployed at the same location, which causes a problem that when the core network device selects a UPF serving the UE, the data transmission delay from the UE to the UPF is not the lowest; in order to solve the above problem, in the data transmission method provided in the embodiment of the present invention, the core network device determines, in real time, which service transfer point to establish the service bearer of the UE through according to the location information of the UE, so as to ensure a transmission delay between the UE and the UPF and ensure user experience.

For example, a service transfer point is taken as an UPF for explanation, and a specific implementation process is as follows:

example one

An embodiment of the present invention provides a data transmission method, as shown in fig. 3, including:

s101, core network equipment acquires a service transfer point list and at least one piece of position information of UE; wherein the service transfer point list comprises at least one service transfer point to which the UE can connect.

Optionally, before the core network device obtains the service transfer point list of the UE and the at least one piece of location information, as shown in fig. 4, the method further includes:

s104, the core network equipment acquires a service forming power value of at least one UE; and the service forming power value is equal to the success rate of switching the UE from the second service transfer point to the first service transfer point.

And S105, the core network equipment determines the coverage area of each service transfer point according to the service success rate.

Specifically, in practical applications, the coverage area of the service transfer point may be a circle, a square, or an irregular figure.

Wherein the sample statistics may be performed when the traffic bearer of the UE is changed from the UPF1 to the UPF 2. The total number of samples is set as data set M, and the values in the samples are the location information of the UE and the traffic power value when the UE changes from UPF1 to UPF 2. Then the sample total number set M: { lh1, lv1, Rs 1; lh2, lv2, Rs 2; … … lhm, lvm, Rsm }, where lh is the abscissa of the UE, lv is the ordinate of the UE, Rs is the traffic success rate when the UE performs a change from UPF1 to UPF2 at the location, and m is the total number of samples.

Processing the sample, and setting a sample data set R as a service success rate data set, then R: { Rs1, Rs2, Rs3, … Rsm }, which are obtained from the total data set M of samples. According to the classification theory, let the clustering tree be k, where k is 2 as an example, and the maximum number of iterations be N, where k is 3 if the clustering tree is classified into three categories, namely high, medium, low. Therefore, data analysis can be carried out according to the position of the UE and the relative service success rate of the UE, and the UE position corresponding to high success rate, the UE position corresponding to low success rate and a success rate boundary are obtained.

Specifically, different levels of success rate, such as a high service success rate and a low service success rate, need to be divided from all success rate samples, but it is also possible to further refine the success rate samples into three levels or five levels according to the requirement. Two levels may be used here for simplicity of illustration, and the specific implementation is as follows:

the sample data set R is an input sample set, and the cluster division output data set is set as C, { C1, C2, … Ck }. Then, for N1, 2, … N, CINT ═ μ 1, μ 2, … μ k }, the values in the initialization cluster partition are the initial k centroid vectors that are randomly selected k samples from the data set R.

For i ═ 1, 2, … m, the distances of sample Rsi and respective centroid vectors μ j, (j ═ 1, 2, … k) are calculated, aij | | | Rsi- μ j | | | ² ₂ . Marking the minimum Rsi as the type lambada i corresponding to aij, and updating C lambada i to C lambada iU { Rsi }; for

j

1, 2, … k, a new centroid μ j 1/| Cj | (Σx ∈ Cj) is recalculated for all sample points in Cj.

If all k centroid vectors have not changed, outputting a cluster partition C: { C1, C2, … Ck }. It should be noted that, here, an empirical value may be applied to initialize the cluster partition CINT; for the sample collection data set R, two-dimensional data may also be used, for example, service success rate and service establishment delay two-dimensional data calculation.

According to the output cluster C: { C1, C2, … Ck } sample data set M sampled: { lh1, lv1, Rs 1; lh2, lv2, Rs 2; … lhm, lvm, Rstm }, where data is collected, for example, for an area with a length of W1 and a height of W2, a square with an actual geographic area of W as an area is normalized by taking the coordinates { L1, R1} of a certain UPF as a center, and W as W1W 2, that is, if { Lh1, Lv1} falls in a square with an area of W as a coordinate point (Lh1, Lv1), all data in the sample data set M can be put into one elevation data set, and the data set is H: { Lh1, Lv1, Rs 1; lh2, Lv2, Rs 2; … Lhm, Lvm, Rsm }.

According to the output cluster C: { C1, C2, … …, Ck } may classify high service success rate sample data sets HhRs, HhRs: { X1, Y1, Rs 1; x2, Y2, Rs 2; …; xj, Yw, Rst | Rst < Ck, and 0< t < m }, k being 1, or 2. This creates a service range with high service success rate as shown in fig. 5; wherein lh is the abscissa of the UE, and lv is the ordinate of the UE.

It should be noted that this range may be an irregular model, and therefore, at a point outside the model range, the service success rate guarantee for switching to the UPF is low; at points within the model range, the guarantee is higher within the range.

S102, the core network equipment determines a first service transfer point according to the coverage range and the at least one piece of position information of each service transfer point.

Optionally, the core network device determines the first service transfer point according to the coverage area and the at least one location information of each service transfer point, as shown in fig. 6, including:

s1020, the core network device determines a moving path of the UE according to the at least one piece of location information.

Specifically, the core network device may perform connection according to at least one piece of location information of the UE, so as to determine a moving path of the UE.

S1021, the core network equipment determines the coverage of the UE according to the mobile path and the coverage of each service transfer point.

It should be noted that, in practical applications, in order to prevent the collected UE location information from deviating greatly from the actual moving path of the UE; therefore, it is necessary to determine whether the currently acquired location information of the UE deviates from the moving path of the UE; that is, the discrete degree of each piece of location information needs to be determined according to at least one piece of location information of the UE, so that the moving path of the UE is determined according to the location information of which the discrete degree is less than or equal to the discrete threshold, and the coverage area where the UE is currently located can be determined.

For example, if the coverage includes coverage 1 and coverage 2, if the moving path of the UE only passes through coverage 1, it may be determined that the coverage where the UE is currently located is coverage 1; when the moving path of the UE enters the coverage 2 from the coverage 1, it may be determined that the coverage where the UE is currently located is the coverage 2.

S1022, the core network device determines, according to the coverage area where the UE is currently located, that the first service transfer point is a service transfer point corresponding to the coverage area where the UE is currently located.

Specifically, the core network device establishes a model through the position information of the UPF, and the core network device establishes a radiation surface model of the UPF through the position information of the UPF: for example, a circular radiating surface model is established by taking the UPF as a central point, a square radiating surface model is established by taking the UPF as a central point, or an irregular radiating surface model is established by taking the UPF as a central point through big data training; for example, the positional information of the UPF is a circle of a set L, and each point in the set may be represented as L1: { L1, R1} … … LM { LM, RM }, the set L is the set of all circles in { L1 … LM }. Wherein L1 … LM is the center of each circle, and R is the radius with L as the center of the circle and R as the radius. Constructing a circular radiating surface model as shown in FIG. 7; wherein, the coordinates of the center of the circular radiation surface model can be expressed as (PM, QM); alternatively, a square radiation surface model defined by a center point and a length and a width as shown in fig. 8; or, as shown in fig. 9, an irregular radiation surface model defined by a central point and a data point or a grid, which is trained by big data.

Specifically, after the core network device obtains the location information (longitude coordinate and latitude coordinate) of the UE, the core network device aggregates the longitude coordinate and the latitude coordinate of the UE into the radiation plane model of the UPF, so as to determine which UPF should be selected to establish the service bearer of the UE according to the distribution of the longitude coordinate and the latitude coordinate of the UE mapped in the UPF; for example: when the longitude coordinate and the latitude coordinate of the UE fall within the coverage of the UPF1, the traffic bearer of the UE needs to be established through the UPF1 at this time.

Optionally, the core network device determines the first service transfer point according to the coverage area and the at least one location information of each service transfer point, as shown in fig. 10, including:

s1020, the core network equipment determines the moving path of the UE according to the at least one piece of location information.

S1023, the core network equipment determines a first quantity of the position information falling in the coverage area where the UE is located currently and a second quantity of the position information falling in the last coverage area where the UE is located according to the moving path and the at least one piece of position information.

For example, if the coverage includes coverage 1 and coverage 2, if the moving path of the UE only passes through coverage 1, it may be determined that the coverage where the UE is currently located is coverage 1; when the moving path of the UE enters the coverage 2 from the coverage 1, it may be determined that the last coverage where the UE is located is the coverage 1, and the coverage where the UE is currently located is the coverage 2.

And S1024, when the core network equipment determines that the first number is larger than the second number, determining that the first service transfer point is the service transfer point corresponding to the coverage area where the UE is currently located.

Specifically, the core network device may determine a moving path of the UE according to at least one piece of location information of the UE; determining a first quantity of the position information falling in the coverage area where the current UE is located and a second quantity of the position information falling in the last coverage area where the UE is located according to the moving path; in the moving process of the UE, if the UPF is frequently switched, the power consumption of the UE is larger, and a large amount of network resources are occupied to support the UPF switching of the UE; therefore, to reduce frequent switching UPFs; therefore, when the core network equipment determines that the first number is larger than the second number, the first service transfer point is determined to be the service transfer point corresponding to the coverage area where the UE is currently located, so that the UPF switching frequency is reduced, and the user experience is ensured; illustratively, when a UE is determined to enter the coverage of the UPF2 from the coverage of the UPF1 according to the moving path of the UE; wherein the second amount of location information that the UE falls within the coverage of the UPF1 is 30, and the first amount of location information that the UE falls within the coverage of the UPF2 is 3, and at this time, the UE may have just entered the coverage of the UPF2, and it may occur that the UE may be in the common coverage of the UPF1 and the UPF2 at the same time, and at this time, the quality of service provided by the UPF1 for the UE is the same as the quality of service provided by the UPF2 for the UE, so that the UPF handover does not need to be performed now, thereby reducing the handover frequency (i.e., the first amount is less than or equal to the second amount); and as the UE moves, the total number of the location information of the UE falling within the coverage of the UPF1 does not change, while the total number of the location information of the UE falling within the coverage of the UPF2 gradually increases, and when the core network device determines that the first number is greater than the second number, the first service transfer point is determined to be the UPF 2.

Specifically, after the core network device obtains the location information of the UE, according to the data transmission method provided in the embodiment of the present invention, after determining which UPF is selected, the determined result needs to be sent to the UE, so that the UE knows the service bearer currently established with the UPF. If the UPF is changed due to the movement of the UE, for example, from the UPF1 to the UPF2, the UE needs to be informed that the traffic bearer established through the UPF1 needs to be released and the traffic bearer through the UPF2 needs to be re-established. Or the location information of the UE is continuously changed, and the UE does not move out of the coverage of the UPF, so that the UPF does not need to be replaced. Illustratively, as shown in fig. 11. The moving path of the UE runs around a certain range, and the UPF does not need to be replaced at the moment; specifically, if the UE moves within a certain range all the time, the core network device may determine a location reporting period that is greater than a preset threshold, and reduce the frequency of reporting location information by the UE, thereby reducing the occupation of network resources.

Specifically, since the moving speed and the moving path of the UE may change, the core network device needs to determine the time of the location reporting period. For example, when the UE is a UAV, when the UAV flies for a long distance, the location information and the moving speed change after a period of time, so the UE needs to report the location again. As shown in fig. 12, the UAV flies from the coverage of the UPF1 to the coverage of the UPF2, and the UE needs to be informed that the traffic bearer established through the UPF1 needs to be released and the traffic bearer through the UPF2 needs to be re-established.

Specifically, the core network device sets a location reporting period, for example, when it is determined that the UE is flying at a high speed for a long distance, the location reporting period may be set to Tshort ═ 10 mins; or, when it is determined that the UE is performing a round trip within a certain range, the location reporting period may be set to Tlong as 30 mins; specifically, the operation and maintenance personnel can set the position reporting period by themselves according to actual requirements.

Specifically, the core network device may select to send the next location reporting period Tshort or Tlong of the UE to the UE when the UPF is not changed, so that the UE reports the next location information according to the location reporting period.

Specifically, when the UE does not support changing the periods Tshort and Tlong, the UE and the core network device need to support a default period, and the UE may not support being queried by the core network device. At the moment, the UE supports a simple position selection reporting, the core network equipment does not need to trigger position information inquiry, the UE can report the position autonomously, the UE supports a time timer for reporting the position periodically, and the core network equipment has the capability of modifying the timer. If the core network equipment supports triggering position information query and sends query information to the UE which does not support position information query, the UE returns a reason value, the reason value identified by the core network equipment indicates that the UE does not support the query of the position information by the core network equipment, and if the returned reason value is not identified by the core network equipment, the core network equipment is compatible and records that the UE does not actually support the query of the position information by the core network equipment. At this time, the core network device supports receiving the report of the UE on the location information.

S103, the core network equipment determines that a second service transfer point which provides service for the UE currently is different from a first service transfer point, and reestablishes the service bearer of the UE through the first service transfer point; wherein each service transit point corresponds to a coverage area.

Specifically, the core network device determines that a second service transfer point currently providing service for the UE is the same as the first service transfer point, and continues to establish a service bearer of the UE through the second service transfer point.

Optionally, the location information includes longitude and latitude coordinates; as shown in fig. 13, the method further includes:

s106, the core network equipment determines the current resident area of the UE according to the longitude coordinate and the latitude coordinate; wherein the residential area includes an urban or suburban area under construction.

S107, the core network equipment determines a deployment distance according to the residence area; the deployment distance is used for indicating the distance between service transfer points in different residence areas.

When the service transfer point is newly established in each residence area, the deployment distance refers to the distance between the service transfer point and the adjacent service transfer point; as shown in FIG. 14, the adjacent UPFs of the UPF1 include UPF2, UPF3, UPF4, and UPF 5; and adjacent UPFs of the UPF2 include UPF1, UPF3, and UPF 5; therefore, when the

UPFs

1, 2, 3, 4, and 5 are located in the same residence area, the deployment distance between the UPFs 1 and 2, the deployment distance between the UPFs 1 and 3, the deployment distance between the UPFs 1 and 4, and the deployment distance between the UPFs 1 and 5 are all the same.

S108, the core network equipment determines a position reporting period according to the deployment distance and the moving speed of the UE, and sends the position reporting period to the UE so that the UE can report the position information according to the position reporting period.

It should be noted that, in practical applications, the core network device supports caching and storing all the report messages obtained through the API.

Specifically, the longitude coordinate, the latitude coordinate, the moving speed, and the like of the UE may be determined by its own positioning device, and the moving speed is determined according to the current time and the distance moved by the previous time.

Specifically, the UE can move about 10km after 0.6h when the moving speed determined by the UE according to the moving distance of the current time and the last time is 15 km/h; after the UE moves 10m, in order to ensure that the data transmission delay of the communication link between the UE and the core network device is the lowest, it is necessary to determine whether the UPF needs to be switched, so as to ensure the user experience in real time; the core network equipment pre-configures deployment distances of UPFs corresponding to different residence areas; illustratively, when the deployment distance L of an urban building area is 10km, the deployment distance L of a suburban area is 20km, the moving speed of the UE determined according to the moving distance of the current time and the last time is 15km/h, and the UE is located in the urban building area, the delay test period is

When the UE is located in suburb, the time delay test period is as follows

Specifically, the core network device may send a query message to the UE when obtaining the location information of the UE, so that the UE reports the moving speed and the at least one location information according to the query message. The query message carries a unique identifier of the UE, and may be a control plane message or a heartbeat message in 4G, or may be a message based on an HTTP protocol stack in 5G; after receiving the query message, the UE verifies whether the query message is the unique identifier of the UE, and if so, the UE reports the moving speed and at least one piece of position information; if not, returning an abnormal reason code, such as #78Illegal query; the UE may also verify whether the terminal has signed the inquiry service, such as Illegal network inquiry, no subscription of the UE to the service, and if the terminal has not signed the service, feed back an abnormal reason code, such as #78Illegal query.

Specifically, when reporting the moving speed and the at least one piece of location information to the core network device, the UE may directly return through a control plane message or a heartbeat message, and perform encoding through an ASCII code, for example, if the moving speed of the terminal is 60km/h, the encoding may be a flightrate of 60 km/h.

Specifically, the UE may also directly return its own location information, including an IP address, a geographic location, or a GPS, for example, the longitude coordinate and the latitude coordinate of the UAV are (J) _UAV ，W _UAV )。

Specifically, the UE may also return a movement path, where the movement path includes a set of longitude and latitude coordinates { P1-PN }, where each P is a point PN traversed by the UE and is defined as (XN, YN). The UE supports a selection function when transmitting the part of information, for example, the UE is an intelligent terminal or in a non-power saving mode, and may select to use a link establishment method for transmission, and at this time, the UE may support an identifier terminalmode for indicating whether to preferentially select a link establishment transmission mobility path (terminalmode router transmission priority). For example, if the identity Terminalmodel of the UE is 1, it indicates that the UE supports establishing a link to transmit the mobile path information, and the mobile path information is carried in the UE capability during the UE attachment process, and the core network device learns the selection of the UE after obtaining the identity.

Specifically, when the identifier Terminalmodel of the UE is 0, the UE transmits through a control plane, for example, the UE supports a power saving mode, or a non-intelligent terminal does not support a UE of a complex protocol stack, and at this time, the UE may select whether to encrypt the control plane for transmission, and when the control plane is used for transmission, path information may have long data, and therefore transmission segments need to be supported; for example, a set of data is carried in a location update message, including a latitude and longitude (J) of the UAV _UAV ，W _UAV ) The flightrate is 60km/h, { P1(X1, Y1), P2(X2, Y2), P3(X3, Y3), P4(X4, Y4), …, PN (XN, YN) }, while since data is transmitted in the control plane in segments, for example:

segment 1: the longitude and latitude of UAV is (J) _UAV ，W _UAV )；

Segment2：flightrate＝60km/h；

Segment3：{P1(X1，Y1)；

Segment4：P2(X2，Y2)；

Segment5：P3(X3，Y3)；

Segment6：P4(X4，Y4)；

……；

Segment7：PN(XN，YN)}。

Specifically, after obtaining the authorization of the UE, the core network device may simultaneously support establishing a link or obtaining a moving speed and a moving path of UE transmission in a control plane signaling manner. And storing the moving speed and the moving path in the core network equipment; meanwhile, after the core network equipment obtains at least one piece of position information, moving speed and moving path of the UE, a calculation model is established; thereby determining a moving path of the UE according to the calculation model; the moving path includes a long-distance linear moving path, a patrol path, a transportation path and the like.

It can be known from the foregoing solution that, in the data transmission method provided in the embodiment of the present invention, the core network device obtains at least one piece of location information of the UE and the service transit point list; the service transfer point list comprises at least one service transfer point which can be connected by the UE; the core network equipment determines a first service transfer point according to the coverage range and the at least one piece of position information of each service transfer point; the core network equipment determines that a second service transfer point which provides service for the UE currently is different from a first service transfer point, and reestablishes the service bearer of the UE through the first service transfer point; when the service transfer point is UPF, the core network equipment can determine which service transfer point to establish the service bearer of the UE in real time according to the position information of the UE, thereby ensuring the transmission delay from the UE to the UPF and ensuring the user experience; the problem of how to establish a transmission channel between the UE and the UPF and ensure the lowest transmission delay of the transmission channel is solved.

Example two

An embodiment of the present invention provides a core network device 10, as shown in fig. 15, including:

a transceiver unit 101, configured to obtain a service transfer point list and at least one piece of location information of a UE; wherein the service transfer point list comprises at least one service transfer point to which the UE can connect.

The processing unit 102 is configured to determine the first service transfer point according to the coverage area of each service transfer point acquired by the transceiving unit and the at least one piece of location information acquired by the transceiving unit 101.

The processing unit 102 is further configured to reestablish a service bearer of the UE through the first service transfer point when it is determined that a second service transfer point currently providing a service for the UE is different from the first service transfer point; wherein each service transit point corresponds to a coverage area.

Optionally, the processing unit 102 is specifically configured to determine a moving path of the UE according to at least one piece of location information acquired by the transceiver unit 101; a processing unit 102, configured to determine, according to the moving path and the coverage area of each service transfer point obtained by the transceiving unit 101, a coverage area where the UE is currently located; the processing unit 102 is specifically configured to determine, according to the coverage area where the UE is currently located, that the first service transfer point is a service transfer point corresponding to the coverage area where the UE is currently located.

Optionally, the processing unit 102 is specifically configured to determine a moving path of the UE according to at least one piece of location information acquired by the transceiver unit 101; a processing unit 102, configured to determine, according to the moving path and the coverage area of each service transfer point obtained by the transceiving unit 101, a coverage area where the UE is currently located; a processing unit 102, configured to determine, according to the moving path and at least one piece of location information obtained by the transceiver unit 101, a first number of location information falling within a coverage area where the UE is currently located and a second number of location information falling within a last coverage area where the UE is located; the processing unit 102 is specifically configured to determine that the first service transfer point is a service transfer point corresponding to a coverage area where the UE is currently located when it is determined that the first number is greater than the second number.

Optionally, the transceiver unit 101 is further configured to obtain a service forming power value of at least one UE; the service forming power value is equal to the success rate of switching the UE from the second service transfer point to the first service transfer point; the processing unit 102 is further configured to determine a coverage area of each service transfer point according to the service success rate obtained by the transceiving unit 101.

Optionally, the location information includes longitude and latitude coordinates; the processing unit 102 is further configured to determine a currently-located residence area of the UE according to the longitude coordinate acquired by the transceiver unit 101 and the latitude coordinate acquired by the transceiver unit 101; wherein the residential area comprises an urban or suburban area under construction; the processing unit 102 is further configured to determine a deployment distance according to the residence area; the deployment distance is used for indicating the distance between service transfer points in different residence areas; the processing unit 102 is further configured to determine a location reporting period according to the deployment distance and the moving speed of the UE acquired by the transceiver unit 101, and control the transceiver unit 101 to send the location reporting period to the UE, so that the UE reports location information according to the location reporting period.

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and the function thereof is not described herein again.

The core network device 10 includes, in the case of an integrated module: the device comprises a storage unit, a processing unit and a transmitting-receiving unit. The processing unit is configured to control and manage an action of the core network device, for example, the processing unit is configured to support the core network device to execute processes S101, S102, and S103 in fig. 3; the receiving and sending unit is used for supporting information interaction between the core network equipment and other equipment. And the storage unit is used for storing the program codes and the data of the core network equipment.

In which, the processing unit is taken as a processor, the storage unit is a memory, and the transceiver unit is taken as a communication interface as an example. The core network device shown in fig. 16 includes a communication interface 501, a processor 502, a memory 503, and a bus 504, and the communication interface 501 and the processor 502 are connected to the memory 503 through the bus 504.

The processor 502 may be a general purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to control the execution of programs according to the present disclosure.

The Memory 503 may be a Read-Only Memory (ROM) or other types of static Memory devices that can store static information and instructions, a Random Access Memory (RAM) or other types of dynamic Memory devices that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 503 is used for storing application program codes for executing the scheme of the application, and the processor 502 controls the execution. The communication interface 501 is used for information interaction with other devices, for example, with a remote controller. The processor 502 is configured to execute application program code stored in the memory 503 to implement the methods described in the embodiments of the present application.

Further, a computing storage medium (or media) is also provided, which comprises instructions that when executed perform the method operations performed by the core network device in the above embodiments. Additionally, a computer program product is also provided, comprising the above-described computing storage medium (or media).

It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a portable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

It can be understood that any of the core network devices provided above is used to execute the method corresponding to the embodiment provided above, and therefore, the beneficial effects that can be achieved by the core network devices may refer to the beneficial effects of the method of the first embodiment above and the corresponding scheme in the following detailed description, and are not described again here.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method of data transmission, comprising:

the method comprises the steps that core network equipment obtains a service transfer point list and at least one piece of position information of UE; wherein the service transfer point list comprises at least one service transfer point to which the UE can connect;

the core network equipment determines a first service transfer point according to the coverage area of each service transfer point and the at least one piece of position information;

the core network equipment determines that a second service transfer point which provides service for the UE currently is different from the first service transfer point, and reestablishes the service bearer of the UE through the first service transfer point; wherein, each service transfer point corresponds to a coverage area.

2. The data transmission method according to claim 1, wherein the determining, by the core network device, the first service transfer point according to the coverage area of each service transfer point and the at least one piece of location information, comprises:

the core network equipment determines a moving path of the UE according to the at least one piece of position information;

the core network equipment determines the coverage area of the UE according to the mobile path and the coverage area of each service transfer point;

and the core network equipment determines a first service transfer point as a service transfer point corresponding to the coverage range of the UE according to the coverage range of the UE.

3. The data transmission method according to claim 1, wherein the determining, by the core network device, the first service transfer point according to the coverage area of each service transfer point and the at least one piece of location information, comprises:

the core network equipment determines the coverage area of the UE according to the coverage area of each service transfer point and the moving path;

the core network equipment determines a first quantity of the position information falling in the coverage area where the UE is located currently and a second quantity of the position information falling in the last coverage area where the UE is located according to the moving path and the at least one piece of position information;

and when the core network equipment determines that the first number is larger than the second number, determining that the first service transfer point is a service transfer point corresponding to a coverage area where the UE is currently located.

4. The data transmission method according to any one of claims 1 to 3, wherein before the core network device obtains the service transfer point list of the UE and the at least one location information, the method further comprises:

the core network equipment acquires a service forming power value of at least one UE; the service forming power value is equal to the success rate of switching the UE from the second service transfer point to the first service transfer point;

and the core network equipment determines the coverage range of each service transfer point according to the service success rate.

5. A data transmission method according to any one of claims 1 to 3, wherein the location information comprises longitude and latitude coordinates;

the method further comprises the following steps:

the core network equipment determines the current resident area of the UE according to the longitude coordinate and the latitude coordinate; wherein the residential area comprises an urban or suburban area under construction;

the core network equipment determines a deployment distance according to the area; the deployment distance is used for indicating the distance between service transfer points in different residence areas;

and the core network equipment determines a position reporting period according to the deployment distance and the moving speed of the UE, and sends the position reporting period to the UE so that the UE can report position information according to the position reporting period.

6. A core network device, comprising:

a receiving and sending unit, configured to obtain a service transfer point list and at least one piece of location information of the UE; wherein the service transfer point list comprises at least one service transfer point to which the UE can connect;

the processing unit is used for determining a first service transfer point according to the coverage area of each service transfer point acquired by the transceiving unit and the at least one piece of position information acquired by the transceiving unit;

the processing unit is further configured to reestablish a service bearer of the UE through the first service transfer point when it is determined that a second service transfer point currently providing a service for the UE is different from the first service transfer point; wherein each service transit point corresponds to a coverage area.

7. The core network device according to claim 6, wherein the processing unit is specifically configured to determine a moving path of the UE according to the at least one piece of location information obtained by the transceiver unit;

the processing unit is specifically configured to determine a coverage area where the UE is currently located according to the moving path and the coverage area of each service transfer point obtained by the transceiver unit;

the processing unit is specifically configured to determine, according to a coverage area where the UE is currently located, that a first service transfer point is a service transfer point corresponding to the coverage area where the UE is currently located.

8. The core network device according to claim 6, wherein the processing unit is specifically configured to determine a moving path of the UE according to the at least one piece of location information acquired by the transceiver unit;

the processing unit is specifically configured to determine, according to the moving path and the at least one piece of location information acquired by the transceiver unit, a first number of pieces of location information that fall within a coverage area where the UE is currently located and a second number of pieces of location information that fall within a last coverage area where the UE is located;

the processing unit is specifically configured to determine that the first service transfer point is a service transfer point corresponding to a coverage area where the UE is currently located when it is determined that the first number is greater than the second number.

9. Core network equipment according to any of claims 6 to 8, wherein the transceiver unit is further configured to obtain a service power value of at least one UE; the service forming power value is equal to the success rate of switching the UE from the second service transfer point to the first service transfer point;

the processing unit is further configured to determine a coverage area of each service transfer point according to the service success rate obtained by the transceiving unit.

10. Core network device according to any of claims 6-8, characterized in that the location information comprises longitude and latitude coordinates;

the processing unit is further configured to determine a currently-located residence area of the UE according to the longitude coordinate acquired by the transceiver unit and the latitude coordinate acquired by the transceiver unit; wherein the residential area comprises an urban or suburban area under construction;

the processing unit is further configured to determine a deployment distance according to the region; the deployment distance is used for indicating the distance between service transfer points in different residence areas;

the processing unit is further configured to determine a location reporting period according to the deployment distance and the moving speed of the UE acquired by the transceiver unit, and control the transceiver unit to send the location reporting period to the UE, so that the UE reports location information according to the location reporting period.

11. A computer storage medium comprising instructions which, when run on a computer, cause the computer to perform the data transmission method of any one of claims 1 to 5.

12. A core network device, comprising: communication interface, processor, memory, bus; the memory is used for storing computer execution instructions, the processor is connected with the memory through the bus, and when the core network device runs, the processor executes the computer execution instructions stored by the memory so as to enable the core network device to execute the data transmission method according to any one of the claims 1-5.