CN112449382B - Data transmission method and server - Google Patents

Data transmission method and server Download PDF

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CN112449382B
CN112449382B CN201910804540.8A CN201910804540A CN112449382B CN 112449382 B CN112449382 B CN 112449382B CN 201910804540 A CN201910804540 A CN 201910804540A CN 112449382 B CN112449382 B CN 112449382B
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server
transfer point
preset condition
data transmission
service transfer
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CN112449382A (en
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魏群
马瑞涛
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a data transmission method and a server, relates to the technical field of communication, and solves the problem that in the prior art, when information is transmitted from UE to AF, the total data transmission delay of the information transmission cannot be guaranteed to be the lowest data transmission delay because the shortest distance from the UE to the UPF cannot be guaranteed. The method comprises the following steps: when the server determines to establish bearing with the UE, acquiring a neighboring server list, a service switching point list of the UE and a requested service type; 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 sends a first indication signaling to the core network equipment; and/or the server sends a second indication signaling to the core network equipment when determining that the adjacent server meeting a second preset condition exists in the adjacent server list according to the service type.

Description

Data transmission method and server
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and a server.
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 the 5G core network selects a user plane function entity (UPF for short) close to the UE, and directs the service flow to the local data network through an N6 interface on the UPF.
In the prior art, as shown in fig. 1, the edge calculation technique selects the UPF closest to the UE before the link is established, and then establishes a data connection between the selected UPF and the UE. However, the end-to-end delay does not only calculate the delay from the UE to the UPF, and the information needs to be transmitted to an Application Function (AF) after being transmitted from the UE to the UPF, but when the AF is located inside or outside the operator network, the core network cannot directly determine the actual transmission delay between the UPF and the AF, and only matches one AF for the UE according to a preset rule, and when the information is transmitted from the UE to the AF, although the distance from the UE to the UPF is the shortest, the distance from the UPF to the AF cannot be guaranteed to be the shortest, so that the total data transmission delay cannot be guaranteed to be the lowest data transmission delay, thereby affecting the user experience.
According to the scheme, in the prior art, when information is transmitted from the UE to the AF, although the distance from the UE to the UPF is shortest, the shortest distance from the UPF to the AF cannot be guaranteed, so that the total data transmission delay of information transmission cannot be guaranteed to be the lowest data transmission delay.
Disclosure of Invention
Embodiments of the present invention provide a data transmission method and a server, which 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 a UPF is shortest, the total data transmission delay of information transmission cannot be guaranteed to be the lowest data transmission delay because the shortest distance from the UPF to the AF cannot be guaranteed.
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: when the server determines to establish bearing with the UE, acquiring a neighboring server list, a service switching point list 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 capable of establishing a bearer; the method comprises the steps that when the server determines that a service transfer point meeting a first preset condition exists in a service transfer point list according to a 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 UE to the server through the service transfer point meeting the first preset condition according to the first indication signaling; and/or when the server determines that the adjacent server meeting the 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 the 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 the current service transfer point according to the second indication signaling; each service type corresponds to a preset condition, and the data transmission delay of a communication link is the lowest.
According to the scheme, the UE can establish the load with the server through different service transfer points, and the corresponding time delay of the UE is different when the load is established with the server through each service transfer point; therefore, according to the data transmission method provided by the embodiment of the present invention, when the server determines that the service transfer point meeting the first preset condition exists in the service transfer point list according to the service type requested by the UE, the server sends the first indication signaling carrying the service transfer point meeting the first preset condition to the core network device, so that the core network device reestablishes the 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 when judging that the adjacent server meeting the second preset condition exists in the adjacent server list according to the service type requested by the UE, sending a second indication signaling carrying the adjacent server meeting the second preset condition to the 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 the current service transfer point according to the second indication signaling, and thus the core network equipment can determine the communication link with the shortest data transmission delay, and ensure the user experience.
In a second aspect, an embodiment of the present invention provides a server, including: the receiving and sending unit is used for acquiring a neighboring server list, a service switching 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 determining that a service transfer point meeting a first preset condition exists in the service transfer point list acquired by the transceiving unit according to the service type 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 the 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 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 the 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 the 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.
In a third aspect, an embodiment of the present invention provides a server, including: communication interface, processor, memory, bus; the memory is used for storing computer-executable instructions, the processor is connected with the memory through the bus, and when the server runs, the processor executes the computer-executable instructions stored in the memory, so that the server 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 one of the servers 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 server refer to the beneficial effects of the method according to the first aspect and the solutions 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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art 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 schematic diagram illustrating a PDU session establishment procedure in the prior art;
fig. 3 is a flowchart illustrating 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 third schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 6 is a fourth schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 7 is a fifth flowchart illustrating a data transmission method according to an embodiment of the invention;
fig. 8 is a sixth schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 9 is a seventh schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a deployment distance of a data transmission method according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a server according to an embodiment of the present invention;
fig. 12 is a second schematic structural diagram of a server according to an embodiment of the present invention.
Reference numerals:
a server-10;
a transceiver unit-101; a processing unit-102.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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 present embodiments, words such as "exemplary" or "for example" are used to indicate 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 relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which 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 DN for short), UPF and AF; 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 first step is that the UE sends an NAS message to an AMF, where the NAS message carries a PDU session establishment request; secondly, the AMF selects SMF based on information such as request type, NSSAI and the like; 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 Request) an N4 Session Establishment Request message to the UPF; step ten, UPF responds (N4 interface Session Establishment Response) N4 Session Establishment Response message to SMF; step ten, the SMF initiates (Communication N1N2message transmission) Namf _ Communication _ N1N2MessageTransfer to the AMF, carries the distributed IP address, qoS information and (PDU Session Establishment acceptance) PDU Session Establishment Accept; step two, AMF sends (PDU Session Request of N2 interface) N2 PDU Session Request to RAN, carries (PDU Session Establishment acceptance) PDU Session Establishment Accept; step thirteen, the RAN forwards the NAS message to the UE; fourteenth, 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 bearing Modification) N4 Session Modification to the UPF to provide AN tunnel info; seventeenth step, the UPF returns (N4 bearing 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 (IPv 6 route 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 prefix 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, information needs to be transmitted to the AF after being transmitted from the UE to the UPF, and when the AF is located inside or outside the operator network, the core network cannot directly determine the actual transmission delay between the UPF and the AF, and only one AF can be matched for the UE according to a preset rule, at this time, when information is transmitted from the UE to the AF, although the distance from the UE to the UPF is shortest, the shortest distance from the UPF to the AF cannot be guaranteed, so that the total data transmission delay of information transmission cannot guarantee that the lowest data transmission delay affects the experience of a user, in order to solve the above problems, in the data transmission method provided in the embodiment of the present invention, the server screens a service transfer point satisfying the first preset condition according to the service type of the UE, and notifies the server, so that the core network reestablishes a communication link from the UE to the server through the service transfer point satisfying the first preset condition, and/or the server screens an adjacent server satisfying the second preset condition according to the service type of the service of the UE, thereby notifying the server that the communication link from the current service transfer point to the second server is reestablished through the service server; wherein, the data transmission delay of the communication link is the lowest; therefore, when the server is the AF and the service transfer point is the UPF, the data transmission delay from the UE to the AF can be ensured to be the lowest, and the user experience is ensured.
Specifically, the server may be an AF or a mobile edge computing (hereinafter, referred to as "mobile edge computing").
For example, a server is taken as an AF and a service transfer point is taken as a UPF for explanation, and the 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, 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 capable of establishing a bearer.
It should be noted that, in practical applications, the determining, by the server, the bearer establishment with the UE includes: UE establishes the load for the first time, the core network returns a service switching point list (UPF list) and the preferred sequence, and the UE selects the UPF pushed by the core network to establish the service. 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 (API for short) for reporting and supporting a report message to the AF; wherein, reporting the message includes: the method comprises the steps of establishing a UE identifier of a bearer, a link identifier of an application borne by the UE identifier (AF determines the service type requested by the UE according to the application borne by the UE identifier), and a UPF list, wherein the UPF list comprises five-tuple information (IP address, source port, destination IP address, destination port and transport layer protocol) of each UPF, so that the AF can find a specific UPF through the identifiers.
It should be noted that, in practical application, the current UE establishes a bearer with the AF1 through the UPF1, then the adjacent server list includes all AFs adjacent to the AF1, and the service transfer point list includes all UPFs adjacent to the UPF 1; or, the neighboring server list includes all AFs in the AF pool corresponding to the AF1, and the service transfer point list includes all UPFs in the UPF pool corresponding to the UPF 1.
S102, when the server determines that the service transfer point meeting the 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 the core network equipment, so that the core network equipment can reestablish 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 atmosphere,
s103, when the server determines that the adjacent server meeting the second preset condition exists in the adjacent server list according to the service type, the server sends a second indication signaling carrying the adjacent server meeting the second preset condition to the 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 the 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.
Optionally, when determining 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 the core network device, which includes, as shown in fig. 4, fig. 5, fig. 6, and fig. 7:
s1020, the server obtains 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.
S1021, 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-1 Representing the data transmission delay, D, of data sent between the server and the service switching point during the last delay test period t And the data transmission time delay for transmitting data between the server and the service transfer point in the current time delay test period is shown.
S1022, when the server determines that the service transfer point meeting the first preset condition exists in the service transfer point list according to the service type, the data transmission delay, the packet loss rate and the jitter value, sending a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 jitter value is smaller than or equal to a jitter threshold.
Or,
s1023, when the server determines that the service transfer point meeting the 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 the 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 data transmission delay is smaller than or equal to a delay threshold, packet loss rate is smaller than or equal to a packet loss threshold, and data transmission delay for transmitting data between a previous delay test period server and a service transfer point is larger than or equal to data transmission delay for transmitting data between a current delay test period server and the service transfer point.
Or,
s1024, when the server determines that the service transfer point meeting the first preset condition exists in the service transfer point list according to the service type and the data transmission delay, sending a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 data transmission delay is smaller than or equal to a delay threshold, and data transmission delay of data transmitted between a previous delay test period server and a service transfer point is larger than or equal to data transmission delay of data transmitted between a current delay test period server and the service transfer point.
Or,
s1025, 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, the packet loss rate and the jitter value, a first indication signaling carrying the service transfer point meeting the first preset condition is sent to the 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 data transmission delay is smaller than or equal to a delay threshold, packet loss rate is smaller than or equal to a packet loss threshold, jitter value is smaller than or equal to a jitter threshold, data transmission delay for transmitting data between a server and a service transfer point in a previous delay test period is larger than or equal to 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.
Specifically, the server may further determine, according to the service type, the data transmission delay, and the jitter value, that a service transfer point meeting a first preset condition exists in the service transfer point list, and send a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 data transmission delay is smaller than or equal to a delay threshold value, and a jitter value is smaller than or equal to a jitter threshold value.
Or,
the server can also determine 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 jitter value, and then sends a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 data transmission delay is smaller than or equal to a delay threshold, a jitter value is smaller than or equal to the jitter threshold, and data transmission delay for transmitting data between a previous delay test period server and a service transfer point is larger than or equal to data transmission delay for transmitting data between a current delay test period server and the service transfer point.
Or,
the method comprises the steps that when a server determines that a service transfer point meeting a first preset condition exists in a service transfer point list according to a service type, data transmission delay and a packet loss rate, 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 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 data transmission delay is smaller than or equal to a delay threshold, and the packet loss rate is smaller than or equal to a packet loss threshold.
Or,
the method comprises the steps that when a server determines that a service transfer point meeting a first preset condition exists in a service transfer point list according to a service type and 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 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 data transmission delay is smaller than or equal to a delay threshold value.
Specifically, when the service type of the UE is a multimedia service, the data transmission delay and the jitter value are important, and the AF selection is mainly used for determining the data transmission delay and the jitter value; for example, when the UE currently establishes a connection with the AF1 through the UPF1, the UPFs adjacent to the UPF1 include the UPF2 and the UPF3, and at this time, the AF may measure 6 data transmission delays (data transmission delays of the AF1 to UPF1, AF1 to UPF2, and AF1 to UPF 3) for the UPF1, UPF2, and UPF3, respectively, in the current delay test period, where,
the data transmission delay of the UPF1 is as follows: [50ms,40ms, 55ms,20ms ];
the data transmission delay of the UPF2 is as follows: [70ms,60ms,50ms,40ms,30ms,20ms ];
the data transmission delay of the UPF3 is as follows: [45ms,44ms,45ms,44ms ].
As can be seen from the above-mentioned data,
the jitter value data for UPF1 is: [ Ji1=10, ji2= -10, ji3= -10, ji4= -5, ji5= -30 ];
the jitter value data for UPF2 is: [ Ji1=10, ji2=10, ji3=10, ji4=10, ji5=10];
the jitter value data for UPF3 is: [ Ji1=1, ji2= -1, ji3= -1, ji4= -1, ji5= -1 ].
Assuming that a time delay threshold corresponding to the multimedia service is 50ms and a jitter threshold is 5, at this time, the AF1 determines that the UPF3 meets the requirements of the multimedia service on data transmission time delay and jitter values; therefore, the AF1 may notify the core network UPF3 that it is a better UPF, at this time, after the core network device takes the information (including data transmission delay data from AF1 to UPF1 and data transmission delay data from AF1 to UPF 3) fed back by the AF1, the data transmission delay from the UE to the UPF1 and from the UE to the UPF3 is measured, and according to the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF1 to UPF3, a first total data transmission delay from the UE to AF1 through UPF1 and a second total data transmission delay from the UE to AF1 through UPF3 are determined, and when the second total data transmission delay is smaller than the first total data transmission delay, first instruction information is sent to the core network device, so that the core network device places the data link between the UE and the AF1 that is established through the UPF1, and reestablishes the data link between the UE and the AF1 through the UPF 3; and when the second total data transmission delay is larger than the first total data transmission delay, the core network equipment is not changed.
Specifically, when the service type of the UE is the control instruction, the packet loss rate and the data transmission delay are important, and the AF selects to mainly determine the data transmission delay and the packet loss rate; for example, when the UE currently establishes a connection with the AF1 through the UPF1, the UPF adjacent to the UPF1 includes the UPF2 and the UPF3, and at this time, the AF may respectively measure 6 times of data transmission delay and packet loss rate (data transmission delay and packet loss rate of the AF1 to UPF1, AF1 to UPF2, and AF1 to UPF 3) for the UPF1, UPF2, and UPF3 in the current delay test period, wherein,
the data transmission delay of the UPF1 is as follows: [50ms,40ms, 55ms,20ms ];
the data transmission delay of the UPF2 is as follows: [70ms,60ms,50ms,40ms,30ms,20ms ];
the data transmission delay of the UPF3 is as follows: [45ms,44ms ];
the packet loss rate of the UPF1 is 5%; the packet loss rate of the UPF2 is 4%; the packet loss rate of the UPF3 is 2%.
Assuming that a time delay threshold corresponding to the control instruction is 50ms and a packet loss threshold is 3%, determining that the UPF3 meets the requirements of the multimedia service on data transmission time delay and packet loss rate by the AF 1; therefore, the AF1 may notify the core network UPF3 that it is a better UPF, at this time, after the core network device takes the information (including data transmission delay data from AF1 to UPF1 and data transmission delay data from AF1 to UPF 3) fed back by the AF1, the data transmission delay from the UE to the UPF1 and from the UE to the UPF3 is measured, and according to the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF1 to UPF3, a first total data transmission delay from the UE to AF1 through UPF1 and a second total data transmission delay from the UE to AF1 through UPF3 are determined, and when the second total data transmission delay is smaller than the first total data transmission delay, 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 the AF1 established through UPF1, and reestablish the data link between the UE and AF1 through UPF 3; when the second total data transmission delay is greater than the first total data transmission delay, the core network device does not make any change at this time.
Specifically, when the service type of the UE is a low-latency service, the recursion (meaning that 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 to the service transfer point by the server in the current delay test period) and the data transmission delay are important, the AF selection is mainly used for determining the data transmission delay and the recursion; for example, when the UE currently establishes a connection with the AF1 through the UPF1, and the UPFs adjacent to the UPF1 include the UPF2 and the UPF3, the AF may measure 6 data transmission delays (data transmission delays of the AF1 to UPF1, the AF1 to UPF2, and the AF1 to UPF 3) for the UPF1, the UPF2, and the UPF3, respectively, in the current delay test period, where,
the data transmission delay of the UPF1 is as follows: [50ms,40ms, 55ms,20ms ];
the data transmission delay of the UPF2 is: 49ms,45ms,44ms,40ms,30ms, 20ms;
the data transmission delay of the UPF3 is as follows: [70ms,66ms,67ms,55ms,45ms,60ms ].
Assuming that a delay threshold corresponding to the low-delay service is 50ms and the data transmission delay of the UPF needs to have recursion, at this time, the AF1 determines that only the UPF2 meets the requirements of the multimedia service on the data transmission delay and the recursion; therefore, the AF1 may notify the core network UPF2 that the UPF2 is a better UPF, at this time, after the core network device takes information fed back by the AF1 (including data transmission delay data from the AF1 to the UPF1 and data transmission delay data from the AF1 to the UPF 2), measuring data transmission delays from the UE to the UPF1 and from the UE to the UPF2, and according to the data transmission delay data from the AF1 to the UPF1 and the data transmission delay data from the AF1 to the UPF2, determining a first total data transmission delay from the UE to the AF1 through the UPF1 and a second total data transmission delay from the UE to the AF1 through the UPF2, and when the second total data transmission delay is smaller than the first total data transmission delay, sending first instruction information to the core network device so that the core network device needs to release a data link between the UE and the AF1 established through the UPF1, and reestablish the data link between the UE and the AF1 through the UPF 2; when the second total data transmission delay is greater than the first total data transmission delay, the core network device does not make any change at this time.
Optionally, when the server determines that the adjacent server meeting the second preset condition exists in the adjacent server list according to the service type, the server sends a second indication signaling carrying the adjacent server meeting the second preset condition to the core network device, as shown in fig. 8, the method includes:
s1030, the server acquires the capacity occupancy rate and the computing resources of the adjacent servers; the capacity occupancy rate is used for indicating the ratio of the total number of served users of the adjacent server to the total number of rated service users, and the computing resource is used for indicating the ratio of the total number of unused processors of the adjacent server to the total number of rated processors.
S1031, when the server determines that the adjacent server meeting the second preset condition exists in the adjacent server list according to the service type, the capacity occupancy rate and the computing resource, the server sends a second indication signaling carrying the adjacent server meeting the second preset condition to the 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 the 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 the capacity threshold and the computing resources are greater than or equal to the computing threshold, one capacity threshold and computing threshold for each traffic type.
Specifically, the AF may collect test data for performing a delay test on the UPF and/or the adjacent AF in each delay test period, so as to assist the core network in selecting a communication link with the lowest data transmission delay from the UE to the AF.
For example, assuming a total of k UPFs, each UPF can be labeled UPF1, UPF2, UPF3 … UPFk; the AF sends out k signaling delay Measurement instructions (called as LMI for short) to k UPFs which can be connected with the UE at the same time, and the instructions are marked as LMI1, LMI2 and LMI3 … LMIk respectively; the LMI message may be an independent message, and may be implemented in a bearer establishment manner, or implemented through an open interface formed by an API interface channel.
There are two implementation methods, for example, a bearer method and an LMI message need to ensure that the same route as the existing UPF is carried out as much as possible, so that the measurement channel of an application layer can be triggered by AF, a measurement channel of an application layer is established in the same bearer of the UPF, after the bearer is established, an end-to-end application layer channel to a terminal can be established through a time delay test script text1 through the UPF1, and a time node t0 for transmitting the script text1 from the UPF1 to the AF is recorded; and the script is transmitted from the AF to the time node tpeset of the UPF1, so that the data transmission delay TimeDelay from the AF to the UPF1 is equal to tpeset-t 0; 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, and is not described here again.
Specifically, according to different application layer services, the time delay measured by a script may be used, or a test period Ttext may be set, and the script may perform multiple measurements within the Ttext period to form a set of data transmission delays
The set of data transmission delays for UPF1 may be expressed as: [ TimeDelay0, timeDelay1, …, timeDelayN ];
the set of data transmission delays for UPF2 may be expressed as: [ TimeDelay0, timeDelay1, …, timeDelayN ];
the set of data transmission delays for UPF3 may be expressed as: [ TimeDelay0, timeDelay1, …, timeDelayN ];
the set of data transmission delays for the UPFn may be expressed as: [ TimeDelay0, imedelay1, …, timeDelayN ];
the AF may take the average delay value of the set of data transmission delays of the UPFn, and obtain that the average delay value of the UPF1 is aveTimedelay1, the average delay value of the UPF2 is aveTimedelay2, the average delay value of the UPF3 is aveTimedelay3, and the average delay value of the UPFn is aveTimedelay.
Specifically, in the case of multiple AFs, one primary AF may be set, for example, one primary AF is set in the same local network, and there are p adjacent AFs; for example, for AF1, the neighboring AF list is [ AF2, AF3, …, AFp ]; for AF2, the neighboring AF list is [ AF1, AF3, …, AFp ]; for AF3, the neighboring AF list is [ AF1, AF2, …, AFp ]; for AFp, the neighbor AF list is [ AF1, AF3, …, AFp-1];
according to the increase and decrease of the AF, the set is updated, after the terminal establishes a bearer with the AF2 through the UPF1, the AF2 obtains a UPF list and an adjacent AF list through the API, and at this time, the AF needs to respectively establish a test link (including a communication link from the AF2 to the UPF 1) from each AF to the UPF1 in the adjacent AF list and a test link (including a communication link from the UPF1 to the AF 2) from each UPF value AF2 in the UPF list, so as to find out the AF and/or UPF meeting the conditions, and further assist the core network device to determine the communication link with the lowest data transmission delay, thereby ensuring user experience.
Specifically, when the service type of the UE is a multimedia service, the data transmission delay and the jitter value are important, and the AF selection is mainly used for determining the data transmission delay and the jitter value; for example, when the UE currently establishes a connection with the AF1 through the UPF1, AFs adjacent to the AF1 include AF2 and AF3, and at this time, the AFs may measure 6 data transmission delays (data transmission delays of AF1 to UPF1, AF2 to UPF1, and AF3 to UPF 1) for the AF2 and AF3 respectively in the current delay test period, where,
the data transmission delay of AF1 is: [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 ].
As can be seen from the above-mentioned data,
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 a delay threshold corresponding to the multimedia service is 50ms and a jitter threshold is 5, only AF3 meets the requirements of the multimedia service on data transmission delay and jitter values; therefore, the AF1 may notify the core network AF3 that it is a better AF, at this time, after the core network device takes information (including data transmission delay data from AF1 to UPF1 and data transmission delay data from AF3 to UPF 1) fed back by the AF1, the data transmission delay from the UE to UPF1 is measured, and according to the data transmission delay data from AF1 to UPF1 and the data transmission delay data from AF3 to UPF1, a first total data transmission delay from the UE to AF1 through UPF1 and a second total data transmission delay from the UE to AF3 through UPF1 are determined, and when the second total data transmission delay is smaller than the first total data transmission delay, first instruction information is sent to the core network device, so that the core network device needs to release a data link between the UE and the AF1, and reestablish the data link between the UE and the AF3 through UPF 1; and when the second total data transmission delay is larger than the first total data transmission delay, the core network equipment is not changed.
Optionally, as shown in fig. 9, the method further includes:
s104, the server acquires the longitude coordinate, the latitude coordinate and the moving speed of the UE.
S105, the server 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.
S106, 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.
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. 10, the adjacent UPFs of UPF1 include UPF2, UPF3, UPF4, and UPF5; and the adjacent UPFs of UPF2 include UPF1, UPF3, and UPF5; 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.
And S107, the server determines a time 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 the reported messages obtained through the API; the core network device may send the deployment distance L of the UPF through the API.
Specifically, longitude coordinates, latitude coordinates, moving speed, and the like of the UE may be sent to the AF through the application layer; the longitude coordinate, the latitude coordinate, the moving speed, etc. of the UE are sent to the AF, for example, by means of the app.
Specifically, the AF may calculate a test period T by obtaining the moving speed of the UE from the application layer, for example, if the moving speed of the UE is 15km/h, the AF can move about 10km after 0.6 h; after 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 experience in real time; the core network device pre-configures deployment distances of UPFs corresponding to different residence areas, so that the AF can acquire the deployment distance L through an API; illustratively, the deployment distance L in urban areas is 10km, and the deployment distance L in suburban areas is 20km.
According to the scheme, the UE can establish the load with the server through different service transfer points, and the corresponding time delay of the UE is different when the load is established with the server through each service transfer point; therefore, according to the data transmission method provided by the embodiment of the present invention, when the server determines that the service transfer point meeting the first preset condition exists in the service transfer point list according to the service type requested by the UE, the server sends the first indication signaling carrying the service transfer point meeting the first preset condition to the core network device, so that the core network device reestablishes the 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 when judging that the adjacent server meeting the second preset condition exists in the adjacent server list according to the service type requested by the UE, sending a second indication signaling carrying the adjacent server meeting the second preset condition to the 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 the current service transfer point according to the second indication signaling, and thus the core network equipment can determine the communication link with the shortest data transmission delay, and ensure the user experience.
Example two
An embodiment of the present invention provides a server 10, as shown in fig. 11, including:
a transceiver 101, configured to, when the processing unit 102 determines to establish a bearer with the UE, obtain a neighboring server list, a service transit point list 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 capable of establishing a bearer.
The processing unit 102 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 101 according to the service type acquired by the transceiver unit 101, control the transceiver unit 101 to send a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 atmosphere,
the processing unit 102 is further configured to, when it is determined that an adjacent server meeting a second preset condition exists in the adjacent server list obtained by the transceiving unit 101 according to the service type obtained by the transceiving unit 101, control the transceiving unit 101 to send a second indication signaling carrying the adjacent server meeting the second preset condition to the 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 the current service transit point according to the second indication signaling; each service type corresponds to a preset condition, and the data transmission delay of a communication link is the lowest.
Optionally, the transceiver unit 101 is specifically configured to obtain a packet loss rate and a data transmission delay of data sent between the server and the service transit point in the current delay test period; a processing unit 102, configured to determine a jitter value according to the data transmission delay obtained by the transceiving unit 101; wherein the jitter value is equal to D t-1 -D t ，D t-1 Representing the data transmission delay, D, of data sent between the server and the service switching point during the last delay test period t Representing the data transmission time delay of data transmitted between the server and the service transfer point in the current time delay test period; the processing unit 102 is specifically configured to, when it is determined that a service transit point meeting a first preset condition exists in the service transit point list according to the jitter value, the service type obtained by the transceiving unit 101, the data transmission delay obtained by the transceiving unit 101, and the packet loss rate obtained by the transceiving unit 101, control the transceiving unit 101 to send a packet carrying a packet meeting the first preset condition to the core network deviceA first indication signaling of a service transfer point of the element, so that the core network equipment reestablishes a communication link from the UE to the server through the service transfer point meeting a first preset condition according to the first indication signaling; the first preset condition comprises that data transmission delay is smaller than or equal to a delay threshold, packet loss rate is smaller than or equal to a packet loss threshold, and jitter value is smaller than or equal to a jitter threshold; or, the processing unit 102 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 transceiver unit 101, the data transmission delay acquired by the transceiver unit 101, and the packet loss rate acquired by the transceiver unit 101, control the transceiver unit 101 to send a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 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 in the last delay test period and the service transfer point is larger than or equal to the data transmission delay for transmitting data between the server in the current delay test period and the service transfer point; or, the processing unit 102 is specifically configured to, when it is determined that a service transit point meeting a first preset condition exists in the service transit point list according to the service type obtained by the transceiving unit 101 and the data transmission delay obtained by the transceiving unit 101, control the transceiving unit 101 to send a first indication signaling carrying the service transit point meeting the first preset condition to the core network device, so that the core network device reestablishes a communication link from the UE to the server through the service transit point meeting the first preset condition according to the first indication signaling; the first preset condition comprises that data transmission delay is smaller than or equal to a delay threshold value, and data transmission delay for transmitting data between a previous delay test period server and a service transfer point is larger than or equal to data transmission delay for transmitting data between a current delay test period server and the service transfer point; or, the processing unit 102 is specifically configured to receive and send a list according to the jitter value, the service type obtained by the transceiving unit 101When determining that a service transfer point meeting a first preset condition exists in a service transfer point list, the data transmission delay acquired by the element 101 and the packet loss rate acquired by the transceiving unit 101 control the transceiving unit 101 to send a first indication signaling carrying the service transfer point meeting the first preset condition to the 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 data transmission delay is smaller than or equal to a delay threshold, packet loss rate is smaller than or equal to a packet loss threshold, jitter value is smaller than or equal to a jitter threshold, data transmission delay for transmitting data between a server and a service transfer point in a previous delay test period is larger than or equal to 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.
Optionally, the transceiver 101 is specifically configured to obtain a capacity occupancy rate and a computing resource of an adjacent server; 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 102 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 acquired by the transceiver unit 101, the capacity occupancy rate acquired by the transceiver unit 101, and the computing resource acquired by the transceiver unit 101, control the transceiver unit 101 to send a second indication signaling carrying the adjacent server meeting the second preset condition to the 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 the 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 the capacity threshold and the computing resources are greater than or equal to the computing threshold, one capacity threshold and computing threshold for each traffic type.
Optionally, the transceiver 101 is further configured to obtain a longitude coordinate, a latitude coordinate, and a moving speed of the UE; 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 residence 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 time delay test period according to the deployment distance and the moving speed obtained by the transceiver unit 101.
All relevant contents of the steps related to the above method embodiments may be referred to the functional description of the corresponding functional module, and the functions thereof are not described herein again.
In the case of integrated modules, the server 10 comprises: the device comprises a storage unit, a processing unit and a transmitting and receiving unit. The processing unit is used for controlling and managing the actions of the server, for example, the transceiver unit is used for supporting the server to execute the process S101 in fig. 3, and the processing unit is used for supporting the server to execute the process S102 and the process S103 in fig. 3; the transceiver unit is also used for supporting the information interaction between the server and other devices. And a storage unit for storing the program codes and data of the server.
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 server shown in fig. 12 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 storage devices that can store static information and instructions, a Random Access Memory (RAM) or other types of dynamic storage 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, 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 code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. 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 present 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, comprising instructions which, when executed, perform the method operations performed by the server 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 implementation. 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 type of logical functional division, and other divisions may be realized in practice, for example, multiple 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: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It can be understood that any one of the servers provided above is used to execute a corresponding method in the embodiments provided above, and therefore, the beneficial effects that can be achieved by the server may refer to the beneficial effects of the method in the first embodiment above and the corresponding scheme in the following detailed description, which are not described herein again.
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 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,
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;
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 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 the method comprises the following steps:
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-1 Data transmission delay, D, representing the transmission of data between said server and said service transfer point in the previous delay test period t And indicating the data transmission time delay of data transmitted between the server and the service transfer point in the current time delay test period.
2. The data transmission method according to claim 1, wherein when the server determines that a service transfer point satisfying 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 satisfying 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 satisfying the first preset condition according to the first indication signaling, including:
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 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;
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 (c) and (d),
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 obtained by the transceiver unit according to the service type 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 transit 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;
the receiving and sending unit is specifically configured to obtain a packet loss rate and a data transmission delay of data sent 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-1 Data transmission for transmitting data between the server and the service switching point in the last time delay test periodDelay in delivery, D t And indicating the data transmission time delay of data transmitted between the server and the service transfer point in the current time delay test period.
6. The server according to claim 5, wherein the processing unit is specifically configured to, when determining that a service transit point meeting a first preset condition exists in the service transit point list according to the jitter value, 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 transit point meeting the first preset condition to a core network device, so that the core network device reestablishes the communication link from the UE to the server through the service transit 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 transceiving unit, the capacity occupancy rate obtained by the transceiving unit, and the computing resource obtained by the transceiving unit, control the transceiving 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 transit 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 by 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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