CN112449382A - Data transmission method and server - Google Patents

Abstract

Embodiments of the present invention provide a data transmission method and server, which relate to the field of communication technologies, and solve the problem in the prior art that when information is transmitted from a UE to an AF, although the distance from the UE to the UPF is the shortest, it cannot be guaranteed that the UPF is transmitted to the The distance of AF is the shortest, resulting in the problem that the total data transmission delay of information transmission cannot be guaranteed to be the lowest data transmission delay. The method includes: when the server determines to establish a bearer with the UE, obtaining a list of adjacent servers, a list of service transfer points of the UE and a requested service type; When the service transfer point is established, send the first indication signaling to the core network device; and/or, when the server determines that there is a neighbor server satisfying the second preset condition in the neighbor server list according to the service type, send the first indication signaling to the core network device Send the second indication signaling.

Description

A data transmission method and server

technical field

The present invention relates to the field of communication technologies, and in particular, to a data transmission method and a server.

Background technique

In the fifth-generation mobile communication technology (English full name: 5th-generation, abbreviation: 5G) network architecture, edge computing technology enables operators and third-party services to be deployed close to user equipment (English full name: user equipment, abbreviation: UE). Access points, thereby reducing end-to-end latency and transmission network load, enabling more efficient service delivery. The implementation principle is that the 5G core network selects a user plane function entity (full name in English: user plane function, UPF for short) close to the UE, and directs service traffic to the local data network through the N6 interface on the UPF.

In the prior art, in the edge computing technology shown in FIG. 1 , before the link is established, the network selects the UPF closest to the UE, and then establishes a data connection between the selected UPF and the UE. However, since the end-to-end delay does not only calculate the delay from the UE to the UPF, after the information is transmitted from the UE to the UPF, it also needs to be transmitted to the application function (English full name: ApplicationFunction, abbreviation: AF), and when the AF is located in the operator network In this case, the core network cannot directly determine the actual transmission delay between the UPF and the AF, and can only match an AF for the UE according to the preset rules. At this time, when the information is transmitted from the UE to the AF During AF, although the distance from UE to UPF is the shortest, it cannot guarantee the shortest distance from UPF to AF, so the total data transmission delay cannot be guaranteed to be the lowest data transmission delay, which affects the user experience.

It can be seen from the above solutions that in the prior art, when the information is transmitted from the UE to the AF, although the distance from the UE to the UPF is the shortest, since the distance from the UPF to the AF cannot be guaranteed to be the shortest, the total data transmission delay of the information transmission cannot be guaranteed to be The problem of the lowest data transmission delay.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a data transmission method and server, which solve the problem that when information is transmitted from UE to AF in the prior art, although the distance from UE to UPF is the shortest, the shortest distance from UPF to AF cannot be guaranteed, resulting in The total data transmission delay of information transmission cannot be guaranteed to be the problem of the lowest data transmission delay.

To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a data transmission method, including: when a server determines to establish a bearer with a UE, obtains a list of adjacent servers, a list of service transfer points of the UE, and a requested service type; wherein, the adjacent server The list includes at least one adjacent server, and the service transfer point list includes at least one bearer-establishable service transfer point; the server determines, according to the service type, when there is a service transfer point that meets the first preset condition in the service transfer point list , send the first indication signaling carrying the service transfer point that satisfies the first preset condition to the core network device, so that the core network device can re-establish the service transfer point that satisfies the first preset condition according to the first instruction signaling The communication link from the UE to the server; and/or, when the server determines, according to the service type, that there is a neighbor server that meets the second preset condition in the neighbor server list, it sends a message to the core network device that carries the phase that meets the second preset condition. The second indication signaling of the neighboring server, so that the core network device re-establishes the communication link between the UE and the neighboring server that satisfies the second preset condition through the current service transfer point according to the second indication signaling; wherein, each service The type corresponds to a preset condition, and the data transmission delay of the communication link is the lowest.

It can be seen from the above solution that since the UE can establish a bearer with the server through different service transfer points, the corresponding delay when the UE establishes a bearer with the server through each service transfer point is different; therefore, the data provided by the embodiments of the present invention are The transmission method, according to the service type requested by the UE, when the server determines that there is a service transfer point that satisfies the first preset condition in the service transfer point list, and sends a message carrying the service transfer point that meets the first preset condition to the core network device. the first indication signaling, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling; and/or, according to the service type requested by the UE, When judging that there are adjacent servers meeting the second preset condition in the adjacent server list, send the second indication signaling carrying the adjacent servers meeting the second preset condition to the core network device, so that the core network device can follow the second indication signaling, through the current service transfer point to re-establish the communication link between the UE and the adjacent server that satisfies the second preset condition, so that the core network device can determine the communication link with the shortest data transmission delay, which ensures the user experience , which solves the problem in the prior art that when the information is transmitted from the UE to the AF, although the distance from the UE to the UPF is the shortest, because the distance from the UPF to the AF cannot be guaranteed to be the shortest, the total data transmission delay of the information transmission cannot be guaranteed to be the lowest. the problem of data transmission delay.

In a second aspect, an embodiment of the present invention provides a server, including: a transceiver unit, configured to obtain a list of adjacent servers, a list of service transfer points of the UE, and a requested service type when the processing unit determines to establish a bearer with a UE; wherein , the adjacent server list includes at least one adjacent server, and the service transfer point list includes at least one service transfer point that can establish a bearer; the processing unit is further configured to determine the service transfer acquired by the transceiver unit according to the service type acquired by the transceiver unit. When there is a service transfer point that satisfies the first preset condition in the contact list, the transceiver unit is controlled to send the first indication signaling carrying the service transfer point that meets the first preset condition to the core network device, so that the core network device can according to the The first indication signaling is to re-establish the communication link between the UE and the server through the service transfer point that satisfies the first preset condition; and/or, the processing unit is further configured to determine, according to the service type obtained by the transceiver unit, that the transceiver unit obtains When there are adjacent servers that meet the second preset condition in the adjacent server list of The second indication signaling is to re-establish the communication link between the UE and the adjacent server that satisfies the second preset condition through the current service transfer point; wherein, each service type corresponds to a preset condition, when the data of the communication link is transmitted Minimum delay.

In a third aspect, an embodiment of the present invention provides a server, including: a communication interface, a processor, a memory, and a bus; the memory is used to store computer execution instructions, the processor and the memory are connected through a bus, and when the server is running, the processor executes The computer-executed instructions stored in the memory cause the server to perform the method provided by the first aspect above.

In a fourth aspect, embodiments of the present invention provide a computer storage medium comprising instructions, which when executed on a computer, cause the computer to perform the method provided in the above-mentioned first aspect.

It can be understood that any one of the servers provided above is used to execute the method corresponding to the first aspect provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the method of the first aspect above and the following detailed description. The beneficial effects of the corresponding solution will not be repeated here.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a network architecture diagram of a data transmission method provided by an embodiment of the present invention;

2 is a schematic diagram of a flow chart of a PDU session establishment in the prior art;

3 is one of the schematic flowcharts of the data transmission method provided by the embodiment of the present invention;

4 is a second schematic flowchart of a data transmission method provided by an embodiment of the present invention;

5 is a third schematic flowchart of a data transmission method provided by an embodiment of the present invention;

6 is a fourth schematic flowchart of a data transmission method provided by an embodiment of the present invention;

7 is a fifth schematic flowchart of a data transmission method provided by an embodiment of the present invention;

8 is a sixth schematic flowchart of a data transmission method provided by an embodiment of the present invention;

FIG. 9 is a seventh schematic flowchart of a data transmission method provided by an embodiment of the present invention;

10 is a schematic diagram of a deployment distance of a data transmission method provided by an embodiment of the present invention;

11 is one of the schematic structural diagrams of a server provided by an embodiment of the present invention;

FIG. 12 is a second schematic structural diagram of a server provided by an embodiment of the present invention.

Reference number:

server-10;

Transceiver unit-101; Processing unit-102.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and functions. Those skilled in the art can understand that words such as "first" and "second" are not intended to limit the quantity and execution order.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as an example, illustration or illustration. Any embodiments or designs described as "exemplary" or "such as" in the embodiments of the present invention should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

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

The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. The symbol "/" in this document indicates the relationship in which the associated object is or, for example, A/B indicates A or B.

The UE in the embodiment of the present invention may be an intelligent mobile terminal, an unmanned aerial vehicle (full name in English: unmanned aerialvehicle/drones, UAV for short), or a smart car. The intelligent mobile terminal is a mobile terminal with an operating system. The intelligent mobile terminal can be: a smart phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (full name in English: ultra-mobile personal computer, abbreviation: UMPC), a netbook, and a personal digital assistant (full name in English: personal digital assistant, abbreviated as: PDA), smart watch, smart bracelet and other terminal devices, or the smart mobile terminal may also be other types of smart mobile terminals, which are not specifically limited in the embodiment of the present invention.

The data transmission method provided by the embodiment of the present invention is applied to the network architecture shown in FIG. 1 , including: UE, base station (full name in English: evolved node B, abbreviation: eNodeB), and radio access network (full name in English: radio access network, Abbreviation: RAN), access and mobility management function entity (full English name: access and mobility management function, abbreviation: AMF), session management function entity (full English name: session management function, abbreviation: SMF), policy control function entity (full English name: policy control function, PCF), home subscriber server (full name in English: unified data management, abbreviation: UDM), target network (full name in English: destination network, abbreviation: DN), UPF, and AF; Full name: evolvednode B, referred to as eNodeB); as shown in Figure 2, when the UE establishes a Protocol Data Unit (English full name: Protocol Data Unit, referred to as: PDU) session, the first step is that the UE sends a NAS message to the AMF, carrying the PDU session establishment request; second step, AMF selects SMF based on the request type, NSSAI and other information; third step, AMF sends PDU session establishment context request to SMF; fourth step, SMF calls (user database registration) Nudm_UECM_Registration for this PDU Session in UDM In the fifth step, SMF returns to AMF (PDU session context creation feedback) Nsmf_PDUSession_CreateSMContextResponse carries Cause and (session management context ID) SM Context ID; sixth step, SMF executes PCF selection function; seventh step, SMF executes (session management context ID) Management policy establishment) Session Management Policy Establishment process, obtains the default PCC rule for the PDU session; Step 8, SMF selects SSC Mode for the PDU session, performs UPF selection, and assigns an IPv6 prefix to the UE; Step 9, SMF sends ( N4 interface session establishment request) N4 Session EstablishmentRequest message; tenth step, UPF responds to SMF (N4 interface session establishment response) N4 Session EstablishmentResponse message; eleventh step, SMF initiates (communication N1N2 message transmission) Namf_Communication to AMF _N1N2MessageTransfer, carrying the assigned IP address, QoS information, and (PDU Session Establishment Accept) PDU SessionEstablishment Accept; Step 12, AMF sends (N2 interface PDU Session Request) N2 PDU SessionRequest to the RAN, carrying (PDU Session Establishment Accept) PDU Session Establishment Accept; Step 13, RAN forwards the NAS message to UE; Step 14, RAN sends (N2 interface PDU Session Response) N2 PDU SessionResponse to AMF, carrying (Access Network Channel Information) AN Tunnel Info; Tenth Step 5, AMF sends (PDU session content update request) Nsmf_PDUSession_UpdateSMContext Request to SMF; Step 16, SMF sends (N4 bearer modification) N4 Session Modification to UPF, providing AN tunnel info; Step 17, UPF returns ( N4 bearer modification response) N4 Session Modification Response; Step 18, SMF sends (PDU session content update response) Nsmf_PDUSession_UpdateSMContext Response (Cause) to AMF; Step 19, SMF sends (IPv6 route broadcast) IPv6 Router to UE through UPF Advertisement, thereby establishing a PDU session between the UE and the AF.

Among them, when the eighth step is executed, the session management function entity (full name in English: session management function, abbreviation: SMF) selects the session and service continuity mode (full name in English: Session and Service Continuity Mode, abbreviation: SSC Mode) for the PDU session, and executes When the UPF is selected and an IPv6 (internetprotocol version 6) prefix is allocated to the UE, the core network selects a nearby UPF to provide services for the UE; however, since the end-to-end delay does not only calculate the delay from the UE to the UPF, the information After the UE is transmitted to the UPF, it needs to be transmitted to the AF. When the AF is located in the operator's network or outside the network, the core network cannot directly determine the actual transmission delay between the UPF and the AF. The predetermined rule is that the UE matches an AF. At this time, when the information is transmitted from the UE to the AF, although the distance from the UE to the UPF is the shortest, it cannot guarantee the shortest distance from the UPF to the AF, resulting in the total data transmission of the information transmission. The delay cannot be guaranteed to be the lowest data transmission delay, which affects the user experience. To solve the above problem, in the data transmission method provided by the embodiment of the present invention, the server selects the service transfer that meets the first preset condition according to the service type of the UE. point, and inform the core network, so that the core network re-establishes the communication link between the UE and the server through the service transfer point that meets the first preset condition, and/or the server selects the service that meets the second preset condition according to the service type of the UE. the adjacent server, and inform the core network, so that the core network re-establishes the communication link from the UE to the adjacent server that satisfies the second preset condition through the current service transfer point; wherein, the data transmission delay of the communication link is the lowest; thus When the server is an AF and the service transfer point is a UPF, the data transmission delay from the UE to the AF can be guaranteed to be the lowest, which ensures the user experience.

Specifically, the server may be AF or mobile edge computing (full English name: mobile edge computing, abbreviation: MEC).

Exemplarily, taking the server as AF and the service transfer point as UPF as an example, the specific implementation process is as follows:

Example 1

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

S101. When the server determines to establish a bearer with the UE, obtain a list of adjacent servers, a list of service transfer points of the UE, and a requested service type; wherein, the list of adjacent servers includes at least one adjacent server, and the list of service transfer points includes at least one A bearer service transfer point can be established.

It should be noted that, in the actual application, when the server determines to establish a bearer with the UE, it includes: when the UE establishes a bearer for the first time, the core network returns a service transfer point list (UPF list) and a preferred ranking, and the UE selects the core network to push the optimization UPF established business. At this time, the terminal establishes a bearer and links with an AF to implement application layer services.

Specifically, the core network supports an application programming interface (full name in English: application programming interface, abbreviation: API), which is used to report a report message to the AF; wherein the report message includes: the UE identity for establishing the bearer, and the UE identity bearer The link identifier of the application (AF determines the service type requested by the UE according to the application carried by the UE identifier), and the UPF list, which includes the five-tuple information of each UPF (IP address, source port, destination IP address, destination port and transport layer protocol), so that AF can find a specific UPF through these identifiers.

It should be noted that, in an actual application, the current UE establishes a bearer with AF1 through UPF1, then the adjacent server list includes all AFs adjacent to AF1, and the service transfer point list includes all UPFs adjacent to UPF1; The neighbor server list includes all AFs in the AF pool corresponding to AF1, and the service transfer point list includes all UPFs in the UPF pool corresponding to UPF1.

S102. When the server determines, according to the service type, that there is a service transfer point that satisfies the first preset condition in the service transfer point list, sends a first indication message carrying the service transfer point that satisfies the first preset condition to the core network device command, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling.

and / or,

S103. When the server determines, according to the service type, that there are adjacent servers that satisfy the second preset condition in the adjacent server list, send the second indication signaling carrying the adjacent servers that satisfy the second preset condition to the core network device, so that The core network device re-establishes the communication link between the UE and the adjacent server that satisfies the second preset condition through the current service transfer point according to the second indication signaling; wherein, each service type corresponds to a preset condition, and the communication link The data transmission delay is the lowest.

Optionally, when the server determines, according to the service type, that there is a service transfer point that satisfies the first preset condition in the service transfer point list, it sends the first information carrying the service transfer point that meets the first preset condition to the core network device. The indication signaling, as shown in Figure 4, Figure 5, Figure 6 and Figure 7, includes:

S1020, the server obtains the packet loss rate and the data transmission delay of the data sent between the server and the service transfer point in the current delay test period.

S1021. The server determines the jitter value according to the data transmission delay; wherein, the jitter value is equal to D _t-1 -D _t , and D _t-1 represents the data of the data sent between the server and the service transfer point in the last delay test period Transmission delay, D _t represents the data transmission delay of sending data between the server and the service transfer point in the current delay test period.

S1022. The server determines that, according to the service type, data transmission delay, packet loss rate and jitter value, when there is a service transfer point that meets the first preset condition in the service transfer point list, send a message to the core network device that satisfies the first preset condition. Set the first indication signaling of the conditional service transfer point, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling; A preset condition includes that the data transmission delay is less than or equal to the delay threshold, the packet loss rate is less than or equal to the packet loss threshold, and the jitter value is less than or equal to the jitter threshold.

or,

S1023. The server determines that, according to the service type, data transmission delay and packet loss rate, when there is a service transfer point that meets the first preset condition in the service transfer point list, send a message to the core network device that satisfies the first preset condition. The first indication signaling of the service transfer point, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling; wherein the first preset The conditions include that the data transmission delay is less than or equal to the delay threshold, and the packet loss rate is less than or equal to the packet loss threshold, and the data transmission delay of the data sent between the server and the service transfer point in the last delay test cycle is greater than or equal to the current The data transmission delay of the data sent between the server and the service transfer point during the delay test period.

or,

S1024. The server determines, according to the service type and the data transmission delay, that there is a service transfer point that meets the first preset condition in the service transfer point list, and sends a service transfer point carrying the service transfer point that meets the first preset condition to the core network device. The first indication signaling, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling; wherein, the first preset condition includes data transmission. The delay is less than or equal to the delay threshold, and the data transmission delay of the data sent between the server and the service transfer point in the previous delay test period is greater than or equal to the data transmission delay between the server and the service transfer point in the current delay test period. Data transmission delay.

or,

S1025. The server determines that, according to the service type, data transmission delay, packet loss rate and jitter value, when there is a service transfer point that meets the first preset condition in the service transfer point list, send a message to the core network device that satisfies the first preset condition. Set the first indication signaling of the conditional service transfer point, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling; A preset condition includes that the data transmission delay is less than or equal to the delay threshold, and the packet loss rate is less than or equal to the packet loss threshold, and the jitter value is less than or equal to the jitter threshold, and the difference between the server and the service transfer point in the last delay test cycle The data transmission delay of the data sent between the two is greater than or equal to the data transmission delay of the data sent between the server and the service transfer point in the current delay test period. Each service type corresponds to a delay threshold, packet loss threshold and jitter threshold.

Specifically, the server may also, according to the service type, data transmission delay and jitter value, determine that when there is a service transfer point that satisfies the first preset condition in the service transfer point list, send a message to the core network device that satisfies the first preset condition. The first indication signaling of the conditional service transfer point, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling; wherein the first The preset conditions include that the data transmission delay is less than or equal to the delay threshold, and the jitter value is less than or equal to the jitter threshold.

or,

The server may also determine that, according to the service type, data transmission delay and jitter value, when there is a service transfer point that meets the first preset condition in the service transfer point list, send the service carrying the service that meets the first preset condition to the core network device. The first indication signaling of the transfer point, so that the core network device can re-establish the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling; wherein, the first preset condition Including the data transmission delay is less than or equal to the delay threshold, and the jitter value is less than or equal to the jitter threshold, and the data transmission delay of the data sent between the server and the service transfer point in the last delay test cycle is greater than or equal to the current delay test The data transmission delay of the data sent between the periodic server and the service transfer point.

or,

According to the service type, data transmission delay and packet loss rate, the server determines that when there is a service transfer point that meets the first preset condition in the service transfer point list, it sends a service transfer point carrying the service transfer point that meets the first preset condition to the core network device. The first indication signaling of the contact point, so that the core network device re-establishes the communication link from the UE to the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling; wherein, the first preset condition includes The data transmission delay is less than or equal to the delay threshold, and the packet loss rate is less than or equal to the packet loss threshold.

or,

According to the service type and the data transmission delay, when it is determined that there is a service transfer point that meets the first preset condition in the service transfer point list, the server sends to the core network device the first information carrying the service transfer point that meets the first preset condition. an indication signaling, so that the core network device can re-establish the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling; wherein, the first preset condition includes the data transmission delay Less than or equal to the delay threshold.

Specifically, when the service type of the UE is multimedia service, the data transmission delay and jitter value are more important, and the AF selection is mainly based on measuring the data transmission delay and jitter value; The UPFs adjacent to UPF1 include UPF2 and UPF3. At this time, AF can measure the data transmission delays of UPF1, UPF2 and UPF3 for 6 times respectively in the current delay test cycle (AF1 to UPF1, AF1 to UPF2 and AF1 to UPF3 data transmission delay), where,

The data transmission delay of UPF1 is: [50ms, 40ms, 50ms, 40ms, 55ms, 20ms];

The data transmission delay of UPF2 is: [70ms, 60ms, 50ms, 40ms, 30ms, 20ms];

The data transmission delay of UPF3 is: [45ms, 44ms, 45ms, 44ms, 45ms, 44ms].

According to the above data, it can be seen that

The jitter value data of UPF1 is: [Ji1=10, Ji2=-10, Ji3=10, Ji4=-5, Ji5=30];

The jitter value data of UPF2 is: [Ji1=10, Ji2=10, Ji3=10, Ji4=10, Ji5=10];

The jitter value data of UPF3 is: [Ji1=1, Ji2=-1, Ji3=1, Ji4=-1, Ji5=1].

Assuming that the delay threshold corresponding to the multimedia service is 50ms and the jitter threshold is 5, AF1 determines that UPF3 meets the requirements of the multimedia service for data transmission delay and jitter value; therefore, AF1 can notify the core network that UPF3 is a better UPF, At this time, after the core network device obtains the information fed back by AF1 (including the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF1 to UPF3), it measures the data transmission delay from UE to UPF1 and from UE to UPF3, and calculates the data transmission delay from UE to UPF1 and UE to UPF3. According to the data transmission delay data of AF1 to UPF1 and the data transmission delay data of AF1 to UPF3, the first total data transmission delay of UE to transmit to AF1 through UPF1 and the second total data of UE to transmit to AF1 through UPF3 are determined. Transmission delay, when the second total data transmission delay is less than the first total data transmission delay, send the first instruction information to the core network device, so that the core network device can put the data link between the UE and the AF1 established through the UPF1, and restart the A data link between the UE and the AF1 is established through the UPF3; when the second total data transmission delay is greater than the first total data transmission delay, the core network equipment does not make any changes at this time.

Specifically, when the service type of the UE is a control command, the packet loss rate and data transmission delay are more important, and the AF selection is mainly based on measuring the data transmission delay and packet loss rate; for example, when the UE is currently established through UPF1 and AF1 In this case, the UPFs adjacent to UPF1 include UPF2 and UPF3. At this time, AF can measure the data transmission delay and packet loss rate for UPF1, UPF2 and UPF3 for 6 times respectively in the current delay test cycle (AF1 to UPF1, AF1 to UPF1 UPF2 and AF1 to UPF3 data transmission delay and packet loss rate), where,

The data transmission delay of UPF1 is: [50ms, 40ms, 50ms, 40ms, 55ms, 20ms];

The data transmission delay of UPF2 is: [70ms, 60ms, 50ms, 40ms, 30ms, 20ms];

The data transmission delay of UPF3 is: [45ms, 44ms, 45ms, 44ms, 45ms, 44ms];

The packet loss rate of UPF1 is 5%; the packet loss rate of UPF2 is 4%; the packet loss rate of UPF3 is 2%.

Assuming that the delay threshold corresponding to the control command is 50ms and the packet loss threshold is 3%, AF1 determines that UPF3 meets the requirements of multimedia services for data transmission delay and packet loss rate; therefore, AF1 can notify the core network that UPF3 is a better At this time, after the core network device obtains the information fed back by AF1 (including the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF1 to UPF3), it measures the data transmission time from UE to UPF1 and from UE to UPF3. According to the data transmission delay data of AF1 to UPF1 and the data transmission delay data of AF1 to UPF3, the first total data transmission delay of UE to transmit to AF1 through UPF1 and the first total data transmission delay of UE to transmit to AF1 through UPF3 are determined. 2. The total data transmission delay. When the second total data transmission delay is less than the first total data transmission delay, the first instruction information is sent to the core network device, so that the core network device needs to release the UE and AF1 data established through UPF1. link, and re-establish the data link between UE and AF1 through UPF3; when the second total data transmission delay is greater than the first total data transmission delay, the core network equipment does not make any changes at this time.

Specifically, when the service type of the UE is a low-latency service, the recursive (meaning that the data transmission delay of the data sent between the server and the service transfer point in the previous delay test period is greater than or equal to the current delay) In the test period, the data transmission delay (data transmission delay) and data transmission delay of the server sending data to the service transfer point are more important, and the AF selection is mainly based on measuring the data transmission delay and recursion; for example, when the UE is currently established through UPF1 and AF1 In this case, the UPFs adjacent to UPF1 include UPF2 and UPF3. At this time, AF can measure the data transmission delays for UPF1, UPF2 and UPF3 for 6 times in the current delay test cycle (AF1 to UPF1, AF1 to UPF2, and AF1 to UPF3). UPF3 data transmission delay), where,

The data transmission delay of UPF1 is: [50ms, 40ms, 50ms, 40ms, 55ms, 20ms];

The data transmission delay of UPF2 is: [49ms, 45ms, 44ms, 40ms, 30ms, 20ms];

The data transmission delay of UPF3 is: [70ms, 66ms, 67ms, 55ms, 45ms, 60ms].

Assuming that the delay threshold corresponding to the low-latency service is 50ms, and the data transmission delay of the UPF is required to be recursive, AF1 determines that only UPF2 meets the requirements of the multimedia service for the data transmission delay and recursion; therefore, AF1 The core network can be notified that UPF2 is a better UPF. At this time, the core network device obtains the information fed back by AF1 (including the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF1 to UPF2), and then measures the UE to UPF1. and the data transmission delay from UE to UPF2, and according to the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF1 to UPF2, to determine the first total data transmission delay transmitted by the UE to AF1 through UPF1, and The UE transmits the second total data transmission delay to AF1 through UPF2. When the second total data transmission delay is less than the first total data transmission delay, the UE sends the first instruction information to the core network device, so that the core network device needs to release the The data link between UE and AF1 established by UPF1, re-establishes the data link between UE and AF1 through UPF2; when the second total data transmission delay is greater than the first total data transmission delay, the core network equipment does not make any changes at this time .

Optionally, when the server determines, according to the service type, that there is a neighbor server that meets the second preset condition in the neighbor server list, sends a second indication signaling carrying the neighbor server that meets the second preset condition to the core network device. , as shown in Figure 8 including:

S1030, the server obtains the capacity occupancy rate and computing resources of the adjacent server; wherein, the capacity occupancy rate is used to indicate the ratio of the total number of users served by the adjacent server to the total number of rated service users, and the computing resource is used to indicate that the adjacent server is not used. The ratio of the total number of processors to the total number of rated processors.

S1031. According to the service type, capacity occupancy rate, and computing resources, when the server determines that there are adjacent servers that meet the second preset condition in the adjacent server list, send a message to the core network device that carries the adjacent servers that meet the second preset condition. the second indication signaling, so that the core network device can re-establish the communication link between the UE and the adjacent server that satisfies the second preset condition through the current service transfer point according to the second instruction signaling; wherein, the second preset condition includes : The capacity occupancy rate is less than or equal to the capacity threshold and the computing resources are greater than or equal to the calculation threshold. Each service type corresponds to a capacity threshold and a calculation threshold.

Specifically, the AF can assist the core network to select the communication link with the lowest data transmission delay from the UE to the AF by collecting the test data of the delay test performed on the UPF and/or the adjacent AF in each delay test period. .

Exemplarily, assuming that there are k UPFs in total, each UPF can be marked as UPF1, UPF2, UPF3...UPFk; the AF simultaneously sends k signaling delay measurement indications (full English name: Latency MeasurementIndication, referred to as LMI), respectively marked as LMI1, LMI2, LMI3...LMIk; wherein, the LMI message can be an independent message, which can be implemented through a bearer establishment method, or through an open interface formed by an API interface channel.

There are two implementation methods here. For example, the bearer method and the LMI message need to ensure the same route as the existing UPF as much as possible. Therefore, it can be triggered by the AF to establish an application layer measurement channel in the same bearer of the UPF. After the bearer is established , you can pass the delay test script text1, establish an end-to-end application layer channel to the terminal through UPF1, record the time node t0 when the script text1 is transmitted from UPF1 to AF; and the time node tpreset when the script is transmitted from AF to UPF1, then AF to The data transmission delay Timedelay of UPF1 is equal to tpreset-t0; wherein, the calculation method of the data transmission delay from AF to UPFn is the same as the calculation method of the data transmission delay from AF to UPF1, which is not repeated here.

Specifically, according to different application layer services, the time delay Timedelay can be measured by a script, or a test period Ttext can be set, and the script can measure multiple times within the Ttext period to form a set of data transmission delays, then

The set of data transmission delays of UPF1 can be expressed as: [Timedelay0, Timedelay1, ..., TimedelayN];

The set of data transmission delays of UPF2 can be expressed as: [Timedelay0, Timedelay1, ..., TimedelayN];

The set of data transmission delays of UPF3 can be expressed as: [Timedelay0, Timedelay1, ..., TimedelayN];

The set of data transmission delays of UPFn can be expressed as: [Timedelay0, imedelay1, ..., TimedelayN];

The AF can take the average delay of the set of UPFn data transmission delays, and obtain the average delay of UPF1 as aveTimedelay1, the average delay of UPF2 as aveTimedelay2, the average delay of UPF3 as aveTimedelay3, and the average of UPFn delay as aveTimedelay.

Specifically, in the case of multiple AFs, one main AF can be set. For example, one main AF is set in the same local network, and there are p adjacent AFs; for example, for AF1, the adjacent AF list is [AF2, AF3, ..., AFp]; for AF2, the adjacent AF list is [AF1, AF3, ..., AFp]; for AF3, the adjacent AF list is [AF1, AF2, ..., AFp]; for AFp, the relative The neighbor AF list is [AF1, AF3, ..., AFp-1];

According to the increase or decrease of AF, this set will be updated. After the terminal establishes a bearer with AF2 through UPF1, AF2 obtains the UPF list and the adjacent AF list through API. At this time, AF needs to establish each AF in the adjacent AF list separately. The test link to UPF1 (including the communication link from AF2 to UPF1), and the test link of each UPF value AF2 in the UPF list (including the communication link from UPF1 to AF2), so as to find out the AF and/or that meet the conditions Or UPF, and then assist the core network equipment to determine the communication link with the lowest data transmission delay to ensure the user experience.

Specifically, when the service type of the UE is multimedia service, the data transmission delay and jitter value are more important, and the AF selection is mainly based on measuring the data transmission delay and jitter value; The AF adjacent to AF1 includes AF2 and AF3. At this time, AF can measure the data transmission delay of AF2 and AF3 for 6 times in the current delay test cycle (AF1 to UPF1, AF2 to UPF1, and AF3 to UPF1 data). transmission delay), where,

The data transmission delay of AF1 is: [50ms, 40ms, 50ms, 40ms, 55ms, 20ms];

The data transmission delay of AF2 is: [70ms, 60ms, 50ms, 40ms, 30ms, 20ms];

The data transmission delay of AF3 is: [45ms, 44ms, 45ms, 44ms, 45ms, 44ms].

According to the above data, it can be seen that

The jitter value data of AF1 is: [Ji1=10, Ji2=-10, Ji3=10, Ji4=-5, Ji5=30];

The jitter value data of AF2 is: [Ji1=10, Ji2=10, Ji3=10, Ji4=10, Ji5=10];

The jitter value data of AF3 is: [Ji1=1, Ji2=-1, Ji3=1, Ji4=-1, Ji5=1].

Assuming that the delay threshold corresponding to the multimedia service is 50ms and the jitter threshold is 5, only AF3 can meet the requirements of the multimedia service for data transmission delay and jitter value; therefore, AF1 can notify the core network AF3 to be a better AF, and this When the core network device obtains the information fed back by AF1 (including the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF3 to UPF1), it measures the data transmission delay from UE to UPF1, and calculates the data transmission delay from AF1 to UPF1 according to the The data transmission delay data and the data transmission delay data from AF3 to UPF1, so as to determine the first total data transmission delay transmitted by the UE to AF1 through UPF1, and the second total data transmission delay transmitted by the UE to AF3 through UPF1, when The second total data transmission delay is less than the first total data transmission delay, and the first instruction information is sent to the core network device, so that the core network device needs to release the data link between the UE and AF1 established through UPF1, and re-establish the UE through UPF1 Data link with AF3; when the second total data transmission delay is greater than the first total data transmission delay, the core network equipment does not make any changes at this time.

Optionally, as shown in Figure 9, the method further includes:

S104, the server acquires the longitude coordinates, latitude coordinates and moving speed of the UE.

S105 , the server determines the current residency area where the UE is located according to the longitude coordinates and the latitude coordinates; wherein, the residency area includes an urban area under construction or a suburban area.

S106. The server determines the deployment distance according to the residency area; wherein, the deployment distance is used to indicate the distance between service transfer points in different residency areas.

When it needs to be explained, the deployment distance refers to the distance between the service transfer point and the adjacent service transfer point when a new service transfer point is created in each resident area; as shown in Figure 10, the adjacent UPF1 UPF includes UPF2, UPF3, UPF4, and UPF5; and UPF2's adjacent UPFs include UPF1, UPF3, and UPF5; therefore, when UPF1, UPF2, UPF3, UPF4, and UPF5 are located in the same residency area, at this time, UPF1 and UPF2 The deployment distance between, the deployment distance between UPF1 and UPF3, the deployment distance between UPF1 and UPF4, and the deployment distance between UPF1 and UPF5 are all the same.

S107, the server determines the delay test period according to the deployment distance and the moving speed.

It should be noted that, in practical applications, the AF supports caching and storing all reported messages obtained through the API; wherein, the core network device can send the deployment distance L of the UPF through the API.

Specifically, the longitude coordinates, latitude coordinates and moving speed of the UE can be sent to the AF through the application layer; for example, the longitude coordinates, latitude coordinates and moving speed of the UE are sent to the AF through an app.

Specifically, the AF can calculate a test period T based on the moving speed of the UE obtained from the application layer. For example, if the moving speed of the UE is 15km/h, it can only move about 10km after 0.6h; and when the UE moves 10m, In order to ensure that the data transmission delay of the communication link between the UE and the AF is the lowest, it is necessary to determine whether the UPF needs to be switched, so as to ensure the user's experience in real time; among which, the core network equipment will pre-configure the deployment of UPFs corresponding to different residency areas The AF can obtain the deployment distance L through the API; for example, the deployment distance L in the urban construction area is 10km, and the deployment distance L in the suburb is 20km.

It can be seen from the above solution that since the UE can establish a bearer with the server through different service transfer points, the corresponding delay when the UE establishes a bearer with the server through each service transfer point is different; therefore, the data provided by the embodiments of the present invention are The transmission method, according to the service type requested by the UE, when the server determines that there is a service transfer point that satisfies the first preset condition in the service transfer point list, and sends a message carrying the service transfer point that meets the first preset condition to the core network device. the first indication signaling, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling; and/or, according to the service type requested by the UE, When judging that there are adjacent servers meeting the second preset condition in the adjacent server list, send the second indication signaling carrying the adjacent servers meeting the second preset condition to the core network device, so that the core network device can follow the second indication signaling, through the current service transfer point to re-establish the communication link between the UE and the adjacent server that satisfies the second preset condition, so that the core network device can determine the communication link with the shortest data transmission delay, which ensures the user experience , which solves the problem in the prior art that when the information is transmitted from the UE to the AF, although the distance from the UE to the UPF is the shortest, because the distance from the UPF to the AF cannot be guaranteed to be the shortest, the total data transmission delay of the information transmission cannot be guaranteed to be the lowest. The problem of data transmission delay.

Embodiment 2

An embodiment of the present invention provides a server 10, as shown in FIG. 11, including:

The transceiver unit 101 is used for the processing unit 102 to obtain a list of adjacent servers, a list of service transfer points of the UE, and a requested service type when the processing unit 102 determines to establish a bearer with the UE; wherein, the adjacent server list includes at least one adjacent server, and the service transfer The contact list includes at least one service switching point that can establish a bearer.

The processing unit 102 is further configured to, according to the service type acquired by the transceiver unit 101, determine that when there is a service transit point satisfying the first preset condition in the service transit point list acquired by the transceiver unit 101, control the transceiver unit 101 to send the core network device Send the first indication signaling carrying the service transfer point that satisfies the first preset condition, so that the core network device can re-establish the communication between the UE and the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling link.

and / or,

The processing unit 102 is further configured to, according to the service type obtained by the transceiver unit 101, determine that when there are adjacent servers that meet the second preset condition in the adjacent server list obtained by the transceiver unit 101, control the transceiver unit 101 to send a packet containing the data to the core network device. The second indication signaling of the adjacent server that satisfies the second preset condition, so that the core network device can re-establish the communication between the UE and the adjacent server that satisfies the second preset condition through the current service transfer point according to the second indication signaling link; wherein, each service type corresponds to a preset condition, and the data transmission delay of the communication link is the lowest.

Optionally, the transceiver unit 101 is specifically used to obtain the packet loss rate and data transmission delay of data sent between the server and the service transfer point in the current delay test period; the processing unit 102 is specifically used to obtain according to the transceiver unit 101 The _{jitter value} is determined by the data transmission _delay of , D _t represents the data transmission delay of sending data between the server and the service transfer point in the current delay test period; the processing unit 102 is specifically used for the jitter value, the service type acquired by the transceiver unit 101, the The data transmission delay and the packet loss rate obtained by the transceiver unit 101, when it is determined that there is a service transit point that meets the first preset condition in the service transit point list, the transceiver unit 101 is controlled to send a packet that meets the first preset condition to the core network device. The first indication signaling of the conditional service transfer point, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first indication signaling; wherein the first The preset conditions include that the data transmission delay is less than or equal to the delay threshold, and the packet loss rate is less than or equal to the packet loss threshold, and the jitter value is less than or equal to the jitter threshold; The service type, the data transmission delay acquired by the transceiver unit 101, and the packet loss rate acquired by the transceiver unit 101, when it is determined that there is a service transit point that satisfies the first preset condition in the service transit point list, the transceiver unit 101 is controlled to send to the core network The device sends the first indication signaling carrying the service transfer point that satisfies the first preset condition, so that the core network device re-establishes the UE-to-server connection through the service transfer point that satisfies the first preset condition according to the first instruction signaling. Communication link; wherein, the first preset condition includes that the data transmission delay is less than or equal to the delay threshold, and the packet loss rate is less than or equal to the packet loss threshold, and the data transmission between the server and the service transfer point in the last delay test cycle The data transmission delay of the data is greater than or equal to the data transmission delay of the data sent between the server and the service transfer point in the current delay test period; 101 obtains the data transmission delay, and when it is determined that there is a service transfer point that meets the first preset condition in the service transfer point list, the transceiver unit 101 is controlled to send a service transfer point that satisfies the first preset condition to the core network device. The first indication signaling, so that the core network device re-establishes the communication link between the UE and the server through the service transfer point that satisfies the first preset condition according to the first instruction signaling; wherein, the first preset condition includes data transmission. The delay is less than or equal to the delay threshold, and the data transmission delay of the data sent between the server and the service transfer point in the previous delay test period is greater than or equal to the data transmission delay between the server and the service transfer point in the current delay test period. data transmission delay; or, the processing unit 102, specifically configured to The service type obtained by the element 101, the data transmission delay obtained by the transceiver unit 101, and the packet loss rate obtained by the transceiver unit 101, and when it is determined that there is a service transfer point that meets the first preset condition in the service transfer point list, control the transceiver unit. 101 Send a first indication signaling carrying a service transfer point that satisfies the first preset condition to the core network device, so that the core network device re-establishes the service transfer point that satisfies the first preset condition according to the first instruction signaling The communication link from the UE to the server; wherein, the first preset condition includes that the data transmission delay is less than or equal to the delay threshold, and the packet loss rate is less than or equal to the packet loss threshold, and the jitter value is less than or equal to the jitter threshold, and the previous The data transmission delay of the data sent between the server and the service transfer point in the delay test period is greater than or equal to the data transmission delay of the data sent between the server and the service transfer point in the current delay test period. Each service type corresponds to a time delay. Latency Threshold, Packet Loss Threshold, and Jitter Threshold.

Optionally, the transceiver unit 101 is specifically used to obtain the capacity occupancy rate and computing resources of adjacent servers; wherein, the capacity occupancy rate is used to indicate the ratio of the total number of current service users to the total number of rated service users of adjacent servers, and the computing resources Used to indicate the ratio of the total number of unused processors of adjacent servers to the total number of rated processors; the processing unit 102 is specifically used for the service type obtained by the transceiver unit 101, the capacity occupancy rate obtained by the transceiver unit 101, and the data obtained by the transceiver unit 101. Computing resources, when it is determined that there are adjacent servers that meet the second preset condition in the adjacent server list, control the transceiver unit 101 to send to the core network device the second indication signaling that carries the adjacent servers that meet the second preset condition, so that The core network device re-establishes the communication link between the UE and the adjacent server that satisfies the second preset condition through the current service transfer point according to the second indication signaling; wherein, the second preset condition includes: the capacity occupancy rate is less than or equal to The capacity threshold and the computing resources are greater than or equal to the computing threshold, and each service type corresponds to a capacity threshold and a computing threshold.

Optionally, the transceiver unit 101 is further configured to obtain the longitude coordinates, latitude coordinates and moving speed of the UE; the processing unit 102 is further configured to determine the current UE current status according to the longitude coordinates obtained by the transceiver unit 101 and the latitude coordinates obtained by the transceiver unit 101. The resident area where it is located; wherein, the resident area includes urban areas or suburbs under construction; the processing unit 102 is further configured to determine the deployment distance according to the resident area; wherein, the deployment distance is used to indicate service transfer in different resident areas The distance between the points; the processing unit 102 is further configured to determine the delay test period according to the deployment distance and the moving speed obtained by the transceiver unit 101 .

Wherein, all relevant contents of the steps involved in the above method embodiments can be cited in the functional descriptions of the corresponding functional modules, and the functions thereof will not be repeated here.

In the case of using an integrated module, the server 10 includes: a storage unit, a processing unit, and a transceiver unit. The processing unit is used to control and manage the actions of the server. For example, the transceiver unit is used to support the server to perform the process S101 in FIG. 3, and the processing unit is used to support the server to perform the process S102 and the process S103 in FIG. 3; It is used to support the information exchange between the server and other devices. The storage unit is used to store the program code and data of the server.

The processing unit is a processor, the storage unit is a memory, and the transceiver unit is a communication interface as an example. 12 , the server includes a communication interface 501 , a processor 502 , a memory 503 and a bus 504 . 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 (full name in English: Central Processing Unit, referred to as: CPU), a microprocessor, an application-specific integrated circuit (full name in English: Application-Specific Integrated Circuit, referred to as: ASIC), or one or more An integrated circuit for controlling the execution of the program of the present application.

The memory 503 can be a read-only memory (full name in English: Read-Only Memory, referred to as: ROM) or other types of static storage devices that can store static information and instructions, random access memory (full name in English: Random Access Memory, referred to as: RAM) Or other types of dynamic storage devices that can store information and instructions, and can also be Electrically Erasable Programmable Read-Only Memory (English full name: Electrically Erasable Programmable Read-only Memory, abbreviation: EEPROM), read-only CD-ROM (English full name: Compact Disc Read-Only Memory, CD-ROM for short) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of using Without limitation, any other medium that carries or stores the desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory can exist independently and be connected to the processor through a bus. The memory can also be integrated with the processor.

Wherein, the memory 503 is used for storing the application code for executing the solution of the present application, and the execution is controlled by the processor 502 . The communication interface 501 is used for information interaction with other devices, such as information interaction with a remote control. The processor 502 is configured to execute the application program code stored in the memory 503, thereby implementing the method described in the embodiments of the present application.

In addition, a computing storage medium (or medium) is also provided, including instructions that, when executed, perform the method operations performed by the server in the above-described embodiments. In addition, a computer program product is also provided, including the above-mentioned computing storage medium (or medium).

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the embodiments of the present invention. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: read-only memory, referred to as: ROM), random access memory (full name in English: random access memory, referred to as: RAM), magnetic disk or Various media that can store program codes, such as optical discs.

It can be understood that any server provided above is used to execute the method corresponding to the first embodiment provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the method of the above embodiment 1 and the following detailed description. The beneficial effects of the corresponding solution will not be repeated here.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A method of data transmission, comprising:

when a server determines to establish a bearer with UE, acquiring a list of adjacent servers, a list of service transfer points of the UE and a requested service type; the adjacent server list comprises at least one adjacent server, and the service transfer point list comprises at least one service transfer point;

when the server determines that a service transfer point meeting a first preset condition exists in the service transfer point list according to the service type, a first indication signaling carrying the service transfer point meeting the first preset condition is sent to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling;

and/or the presence of a gas in the gas,

when the server determines that an adjacent server meeting a second preset condition exists in the adjacent server list according to the service type, sending a second indication signaling carrying the adjacent server meeting the second preset condition to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the adjacent server meeting the second preset condition through a current service transfer point according to the second indication signaling; each service type corresponds to a preset condition, and the data transmission delay of the communication link is the lowest.

2. The data transmission method according to claim 1, wherein when the server determines that a service transfer point meeting a first preset condition exists in the service transfer point list according to the service type, the server sends a first indication signaling carrying the service transfer point meeting the first preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling, including:

the server acquires the packet loss rate and the data transmission delay of data transmitted between the server and the service transfer point in the current delay test period;

the server determines a jitter value according to the data transmission delay; wherein the jitter value is equal to D_t-1-D_t，D_t-1Representing the data transmission delay, D, of data transmitted between said server and said service switching point in the previous delay test period_tRepresenting a data transmission delay of data transmitted between the server and the service transfer point in a current delay test period;

when the server determines that a service transfer point meeting a first preset condition exists in the service transfer point list according to the jitter value, the service type, the data transmission delay and the packet loss rate, sending a first indication signaling carrying the service transfer point meeting the first preset condition to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition comprises that the data transmission time delay is smaller than or equal to a time delay threshold value, the packet loss rate is smaller than or equal to a packet loss threshold value, and the jitter value is smaller than or equal to a jitter threshold value;

or,

when the server determines that a service transfer point meeting a first preset condition exists in the service transfer point list according to the service type, the data transmission delay and the packet loss rate, sending a first indication signaling carrying the service transfer point meeting the first preset condition to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition includes that the data transmission delay is smaller than or equal to a delay threshold, the packet loss rate is smaller than or equal to a packet loss threshold, and the data transmission delay for transmitting data between the server and the service transfer point in a previous delay test period is larger than or equal to the data transmission delay for transmitting data between the server and the service transfer point in a current delay test period;

or,

when the server determines that a service transfer point meeting a first preset condition exists in the service transfer point list according to the service type and the data transmission delay, a first indication signaling carrying the service transfer point meeting the first preset condition is sent to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition includes that the data transmission delay is smaller than or equal to a delay threshold, and the data transmission delay for transmitting data between the server and the service transfer point in the previous delay test period is greater than or equal to the data transmission delay for transmitting data between the server and the service transfer point in the current delay test period;

or,

when the server determines that a service transfer point meeting a first preset condition exists in the service transfer point list according to the jitter value, the service type, the data transmission delay and the packet loss rate, sending a first indication signaling carrying the service transfer point meeting the first preset condition to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition includes that the data transmission delay is smaller than or equal to a delay threshold, the packet loss rate is smaller than or equal to a packet loss threshold, the jitter value is smaller than or equal to a jitter threshold, and the data transmission delay for transmitting data between the server and the service transfer point in a previous delay test period is greater than or equal to the data transmission delay for transmitting data between the server and the service transfer point in a current delay test period.

3. The data transmission method of claim 2, further comprising:

the server acquires the longitude coordinate, the latitude coordinate and the moving speed of the UE;

the server determines a resident area where the UE is currently located according to the longitude coordinate and the latitude coordinate; wherein the residential area comprises an urban or suburban area under construction;

the server 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;

and the server determines the time delay test period according to the deployment distance and the moving speed.

4. The data transmission method according to claim 1, wherein when the server determines, according to the service type, that there is an adjacent server that meets a second preset condition in the adjacent server list, the server sends a second indication signaling that carries the adjacent server that meets the second preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the adjacent server that meets the second preset condition through a current service transfer point according to the second indication signaling, including:

the server acquires the capacity occupancy rate and the computing resources of the adjacent server; wherein the capacity occupancy is used to indicate a ratio of a total number of served users of the neighboring server to a total number of rated served users, and the computing resource is used to indicate a ratio of a total number of unused processors of the neighboring server to a total number of rated processors;

when the server determines that an adjacent server meeting a second preset condition exists in the adjacent server list according to the service type, the capacity occupancy rate and the computing resource, sending a second indication signaling carrying the adjacent server meeting the second preset condition to core network equipment, so that the core network equipment reestablishes a communication link from the UE to the adjacent server meeting the second preset condition through a current service transfer point according to the second indication signaling; wherein the second preset condition comprises: the capacity occupancy is less than or equal to a capacity threshold and the computing resources are greater than or equal to a computing threshold, one capacity threshold and one computing threshold for each traffic type.

5. A server, comprising:

the receiving and sending unit is used for acquiring a neighboring server list, a service transfer point list of the UE and a requested service type when the processing unit determines to establish a bearer with the UE; the adjacent server list comprises at least one adjacent server, and the service transfer point list comprises at least one service transfer point capable of establishing a bearer;

the processing unit is further configured to, when it is determined that a service transfer point meeting a first preset condition exists in the service transfer point list acquired by the transceiver unit according to the service type acquired by the transceiver unit, control the transceiver unit to send a first indication signaling carrying the service transfer point meeting the first preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling;

and/or the presence of a gas in the gas,

the processing unit is further configured to, when it is determined that an adjacent server meeting a second preset condition exists in the adjacent server list acquired by the transceiver unit according to the service type acquired by the transceiver unit, control the transceiver unit to send a second indication signaling carrying the adjacent server meeting the second preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the adjacent server meeting the second preset condition through a current service transfer point according to the second indication signaling; each service type corresponds to a preset condition, and the data transmission delay of the communication link is the lowest.

6. The server according to claim 5, wherein the transceiver unit is specifically configured to obtain a packet loss rate and a data transmission delay of data transmitted between the server and the service transfer point in a current delay test period;

the processing unit is specifically configured to determine a jitter value according to the data transmission delay acquired by the transceiver unit; wherein the jitter value is equal to D_t-1-D_t，D_t-1Representing the data transmission delay, D, of data transmitted between said server and said service switching point in the previous delay test period_tRepresenting a data transmission delay of data transmitted between the server and the service transfer point in a current delay test period;

the processing unit is specifically configured to, when determining that a service transfer point meeting a first preset condition exists in the service transfer point list according to the jitter value, the service type obtained by the transceiving unit, the data transmission delay obtained by the transceiving unit, and the packet loss rate obtained by the transceiving unit, control the transceiving unit to send a first indication signaling carrying the service transfer point meeting the first preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition comprises that the data transmission time delay is smaller than or equal to a time delay threshold value, the packet loss rate is smaller than or equal to a packet loss threshold value, and the jitter value is smaller than or equal to a jitter threshold value;

or,

the processing unit is specifically configured to, when it is determined that a service transfer point meeting a first preset condition exists in the service transfer point list according to the service type obtained by the transceiver unit, the data transmission delay obtained by the transceiver unit, and the packet loss rate obtained by the transceiver unit, control the transceiver unit to send a first indication signaling carrying the service transfer point meeting the first preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition includes that the data transmission delay is smaller than or equal to a delay threshold, the packet loss rate is smaller than or equal to a packet loss threshold, and the data transmission delay for transmitting data between the server and the service transfer point in a previous delay test period is larger than or equal to the data transmission delay for transmitting data between the server and the service transfer point in a current delay test period;

or,

the processing unit is specifically configured to, when it is determined that a service transfer point meeting a first preset condition exists in the service transfer point list according to the service type acquired by the transceiving unit and the data transmission delay acquired by the transceiving unit, control the transceiving unit to send a first indication signaling carrying the service transfer point meeting the first preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition includes that the data transmission delay is smaller than or equal to a delay threshold, and the data transmission delay for transmitting data between the server and the service transfer point in the previous delay test period is greater than or equal to the data transmission delay for transmitting data between the server and the service transfer point in the current delay test period;

or,

the processing unit is specifically configured to, when determining that a service transfer point meeting a first preset condition exists in the service transfer point list according to the jitter value, the service type obtained by the transceiving unit, the data transmission delay obtained by the transceiving unit, and the packet loss rate obtained by the transceiving unit, control the transceiving unit to send a first indication signaling carrying the service transfer point meeting the first preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; the first preset condition includes that the data transmission delay is smaller than or equal to a delay threshold, the packet loss rate is smaller than or equal to a packet loss threshold, the jitter value is smaller than or equal to a jitter threshold, the data transmission delay for transmitting data between the server and the service transfer point in a previous delay test period is greater than or equal to the data transmission delay for transmitting data between the server and the service transfer point in a current delay test period, and each service type corresponds to one delay threshold, one packet loss threshold and one jitter threshold.

7. The server according to claim 6, wherein the transceiver unit is further configured to obtain longitude coordinates, latitude coordinates, and moving speed of the UE;

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 residence area; 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 the time delay test period according to the deployment distance and the moving speed obtained by the transceiver unit.

8. The server according to claim 5, wherein the transceiver unit is specifically configured to obtain a capacity occupancy rate and a computing resource of the neighboring server; wherein the capacity occupancy rate is used for indicating the ratio of the total number of the current service users of the adjacent server to the total number of the rated service users, and the computing resource is used for indicating the ratio of the total number of the unused processors of the adjacent server to the total number of the rated processors;

the processing unit is specifically configured to, when it is determined that an adjacent server meeting a second preset condition exists in the adjacent server list according to the service type obtained by the transceiver unit, the capacity occupancy rate obtained by the transceiver unit, and the computing resource obtained by the transceiver unit, control the transceiver unit to send a second indication signaling carrying the adjacent server meeting the second preset condition to a core network device, so that the core network device reestablishes a communication link from the UE to the adjacent server meeting the second preset condition through a current service transfer point according to the second indication signaling; wherein the second preset condition comprises: the capacity occupancy is less than or equal to a capacity threshold and the computing resources are greater than or equal to a computing threshold, one capacity threshold and one computing threshold for each traffic type.

9. 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 4.

10. A server, 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 server runs, the processor executes the computer execution instructions stored in the memory so as to enable the server to execute the data transmission method according to any one of the claims 1-4.

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