CN111194092B - Data transmission method and equipment - Google Patents

Data transmission method and equipment Download PDF

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Publication number
CN111194092B
CN111194092B CN201811354474.0A CN201811354474A CN111194092B CN 111194092 B CN111194092 B CN 111194092B CN 201811354474 A CN201811354474 A CN 201811354474A CN 111194092 B CN111194092 B CN 111194092B
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nas message
session management
data
data transmission
management nas
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CN111194092A (en
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郭雅莉
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to CN201811354474.0A priority Critical patent/CN111194092B/en
Priority to PCT/CN2019/117273 priority patent/WO2020098614A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Computer And Data Communications (AREA)

Abstract

The invention discloses a data transmission method and equipment, which are used for solving the problem that the air interface overhead is high during data transmission in the prior art. In the invention, sending equipment generates a data transmission session management NAS message containing transmission data, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header; and the sending equipment sends the data transmission session management NAS message and the PDU session identification to the receiving equipment. Because the data transmission session management NAS message for transmitting data is a session management NAS message for shortening the protocol header or a session management NAS message not containing the protocol header, the overhead of the protocol header of the session management NAS message is reduced, and therefore the overhead of an air interface during data transmission is reduced.

Description

Data transmission method and equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a device for data transmission.
Background
The NextGen (next generation) Network architecture mainly includes UE (User), AMF (Access and Mobility Management Function) entity, AN (Access Network), SMF (Session Management Function) entity, UPF (User Plane Function, User Plane anchor point) Function, and DN (Data Network);
specifically, as shown in fig. 1, the NextGen network architecture is shown, where the AMF entity is responsible for mobility management, and is connected to the UE and the AN, the SMF is responsible for session management and is connected to the UPF, and is mainly responsible for managing a PDU (Protocol Data Unit) session established between the UE and the network, and when a PDU session is established, the SMF selects the UPF for the session. Support for IOT (Internet of Things) communication needs to be considered in the NextGen network, and an important scenario is that a terminal of the Internet of Things sends small data transmission with a long data sending period and a small data sending amount.
Currently, small data transmission is to establish a PDU session for small data transmission after a UE attaches to a network, where the PDU session only establishes a control plane connection, and does not need to establish AN N3 tunnel between AN and AN, nor does it need to establish a user plane radio bearer on AN air interface between the UE and AN. When data transmission is needed later, user data is directly carried in a session management NAS (Non Access Stratum) message between the UE and the SMF, the SMF and the UPF interact with each other through an N4 signaling, and the UPF is responsible for user data interaction between an operator network and an external data network DN.
When small data transmission is carried out, the session management NAS message is taken as a load report to be carried in the mobility management NAS message, the UE sends the mobility management NAS message to the AMF entity, the AMF entity directly sends the session management NAS message to the SMF entity after receiving the mobility management NAS message, and the SMF entity is determined according to a PDU session identifier in the mobility management NAS message; after receiving the session management NAS message, the SMF entity analyzes transmission data in the session management NAS message; in the process, when user data is transmitted, a layer of session management NAS message protocol header and a layer of mobility management NAS message protocol header need to be nested outside the user data, and part of cells in the two layers of NAS message protocol headers are repeated, so that the air interface overhead is high.
In summary, when small data transmission is performed, the overhead of the air interface is large because part of cells in the two layers of NAS message protocol headers are repeated.
Disclosure of Invention
The invention provides a data transmission method and equipment, which are used for solving the problem that the air interface overhead is high during data transmission in the prior art.
In a first aspect, an embodiment of the present invention provides a method for data transmission, where the method includes:
the sending equipment generates a data transmission session management NAS message containing transmission data, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and the sending equipment sends the data transmission session management NAS message and the PDU session identification to the receiving equipment.
In the method, the sending device generates the data transmission session management NAS message containing the transmission data, the data transmission session management NAS message is the session management NAS message with a shortened protocol header or the session management NAS message without the protocol header, and the data transmission session management NAS message and the PDU session identifier are sent to the receiving device.
In a possible implementation manner, when the sending device sends the NAS message for data transmission session management and the PDU session identifier to the receiving device, the sending device sends the NAS message for data transmission session management and the PDU session identifier to the AMF entity, and sends the NAS message for data transmission session management and the PDU session identifier to the receiving device through the AMF entity.
In the method, the sending equipment sends the data transmission session management NAS message and the PDU session identification to the receiving equipment through the AMF entity, so that the data transmission session management NAS message and the PDU session identification can be smoothly sent to the receiving equipment.
In a possible implementation manner, before the sending device generates a data transmission session management NAS message including transmission data, after the sending device determines that a trigger condition is satisfied, it determines to transmit the transmission data by using the data transmission session management NAS message;
wherein, the sending device is a terminal, and the triggering condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through a narrowband Internet of things base station; or
The sending device is a Session Management Function (SMF) entity, and the triggering conditions include part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
According to the method, after the sending device determines that the transmission data is small data and/or the terminal needs to transmit the data through the narrowband Internet of things base station, the data transmission session management NAS message is determined to be used for transmitting the transmission data, so that air interface overhead can be reduced during small data transmission, and other data can be transmitted smoothly.
In a possible implementation manner, when the sending device generates a data transmission session management NAS message including transmission data, the sending device selects a part of cells in a protocol header of the session management NAS message, and generates the session management NAS message including a shortened protocol header according to the selected cells and the transmission data; or
The sending equipment directly generates a session management NAS message which does not contain a protocol header according to the transmission data; or
The sending equipment selects part or all of special cells in a session management NAS message protocol header, and generates a session management NAS message of the shortened protocol header according to the selected special cells and the transmission data; wherein the length of the special cell is smaller than the length of a cell of the same type as the special cell in the session management NAS message protocol header.
According to the method, a plurality of modes of generating the NAS message by the sending equipment are provided, so that the protocol header of the generated NAS message is shortened or does not exist, the overhead of the protocol header of the NAS message is reduced, and the air interface overhead during data transmission is reduced.
In a possible implementation manner, the session management NAS message that does not include the protocol header is the transport data.
According to the method, the session management NAS message which does not comprise the protocol header is the transmission data, only data transmission is carried out during data transmission, and air interface overhead during data transmission is reduced.
In a possible implementation manner, when the sending device sends the NAS message for data transmission session management and the PDU session identifier to the AMF entity, the sending device sends an indication identifier for indicating that the NAS message for session management is an NAS message for data transmission session management, and the NAS message for data transmission session management and the PDU session identifier to the AMF entity.
In the method, when the sending device sends information to the receiving device through the AMF entity, the sending device also sends an indication identifier for indicating that the session management NAS message is the data transmission session management NAS message, together with the data transmission session management NAS message and the PDU session identifier, to the AMF entity, so that the AMF entity forwards all the received information to the receiving device, and then the receiving device can determine that the session management NAS message is the data transmission session management NAS message according to the indication identifier after receiving the indication identifier, and further the receiving device can smoothly read transmission data in the data transmission session management NAS message.
In a possible implementation manner, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
In the method, the PDU session identifier may be used to indicate that the session management NAS message is a data transmission session management NAS message, and at this time, the indication identifier may not be sent, so that transmission of information is reduced, and air interface overhead during data transmission is reduced.
In a possible implementation manner, when the sending device sends the NAS message for data transmission session management and the PDU session identifier to the AMF entity, the sending device is a terminal, and the sending device carries the NAS message for data transmission session management and the PDU session identifier in an NAS message for mobility management and sends the NAS message for data transmission session management and the PDU session identifier to the AMF entity; or
The sending device is an SMF entity, and the sending device sends the data transmission session management NAS message and the PDU session identification to the AMF entity through a call service between the SMF entity and the AMF entity.
In the method, when the sending equipment is a terminal, namely uplink data transmission, the data transmission session management NAS message and the PDU session identification are carried in the mobile management NAS message and sent to the AMF entity; when the sending device is an SMF entity, namely downlink data transmission, sending the data transmission session management NAS message and the PDU session identification to the AMF entity through a calling service between the SMF entity and the AMF entity, and giving a specific transmission scheme.
In a second aspect, an embodiment of the present invention provides a method for data transmission, where the method includes:
the AMF entity receives a data transmission session management NAS message and a PDU session identification sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and the AMF entity sends the received data transmission session management NAS message and the PDU session identification to receiving equipment.
In the method, the AMF entity forwards the received data transmission session management NAS message and the PDU session identifier sent by the sending equipment to the receiving equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol or a session management NAS message without a protocol header.
In a possible implementation manner, when the AMF entity receives a data transmission session management NAS message and a PDU session identifier sent by a sending device, the AMF entity sends an indication identifier for indicating that the session management NAS message is the data transmission session management NAS message, and the data transmission session management NAS message and the PDU session identifier to the receiving device.
In the method, the AMF entity sends the received indication identifier for indicating that the session management NAS message is the data transmission session management NAS message to the receiving equipment, so that the receiving equipment determines that the session management NAS message is the data transmission session management NAS message according to the indication identifier, and the receiving equipment can conveniently read the transmission data in the data transmission session management NAS message.
In a possible implementation manner, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
In the method, the PDU session identifier may be used to indicate that the session management NAS message is a data transmission session management NAS message, and at this time, the indication identifier may not be sent, so that transmission of information is reduced, and air interface overhead during data transmission is reduced.
In a possible implementation manner, when the AMF entity sends the received data transmission session management NAS message and the PDU session identifier to a receiving device, the sending device is a terminal, and the AMF entity sends the received data transmission session management NAS message and the PDU session identifier to the receiving device through a call service between the SMF entity and the AMF entity; or
The sending device is an SMF entity, and the AMF entity carries the data transmission session management NAS message and the PDU session identifier in a mobility management NAS message and sends the message to the receiving device.
In the method, when the sending equipment is the terminal, namely uplink data transmission, the AMF entity carries the data transmission session management NAS message and the PDU session identification on the mobile management NAS message and forwards the message to the receiving equipment; when the sending device is the SMF entity, that is, the downlink data transmission, the AMF entity forwards the data transmission session management NAS message and the PDU session identifier to the receiving device through a call service between the SMF entity and the AMF entity, and gives a specific transmission scheme.
In a third aspect, an embodiment of the present invention provides a method for data transmission, where the method includes:
receiving data transmission session management NAS information and a PDU session identification sent by sending equipment by receiving equipment, wherein the data transmission session management NAS information is session management NAS information of a shortened protocol header or session management NAS information which does not contain the protocol header;
and the receiving terminal equipment reads the transmission data carried in the data transmission session management NAS message and determines the PDU session corresponding to the transmission data according to the PDU session identification.
In the method, the receiving device receives the data transmission session management NAS message and the PDU session identifier sent by the sending device, reads the transmission data in the data transmission session management NAS message, and forwards the read transmission data to the PDU session determined according to the PDU session identifier, where the data transmission session management NAS message is a session management NAS message with a short protocol header or a session management NAS message without a protocol header, so that the protocol header of the session management NAS message is reduced or absent, thereby reducing the overhead of the session management NAS message protocol header, reducing the overhead of an air interface during data transmission, and simultaneously reducing the reading amount of data and accelerating the rate of reading the transmission data when the receiving device reads data.
In a possible implementation manner, when the receiving device receives a data transmission session management NAS message and a PDU session identifier sent by a sending device, the receiving device receives the data transmission session management NAS message and the PDU session identifier sent by the sending device through an AMF entity.
In the method, the receiving device receives the data transmission session management NAS message and the PDU session identification sent by the sending device through the AMF entity, so that the receiving device can smoothly receive the data transmission session management NAS message and the PDU session identification sent by the sending device.
In a possible implementation manner, when the receiving device receives, through an AMF entity, a data transmission session management NAS message and a PDU session identifier sent by the sending device, the receiving device receives, through the AMF entity, an indication identifier sent by the sending device and used for indicating that the session management NAS message is the data transmission session management NAS message;
wherein the indication identifier is received with the data transport session management, NAS, message and the PDU session identifier.
In the method, when the receiving device receives data, the AMF entity further receives an indication identifier, which is sent by the sending device and used for indicating that the session management NAS message is the data transmission session management NAS message, and after receiving the indication identifier, the receiving device can determine that the session management NAS message is the data transmission session management NAS message.
In a possible implementation manner, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
In the method, the PDU session identifier may be used to indicate that the session management NAS message is a data transmission session management NAS message, and at this time, the indication identifier may not be sent, so that transmission of information is reduced, and air interface overhead during data transmission is reduced.
In a possible implementation manner, after receiving a data transmission session management NAS message sent by a sending device, and before reading transmission data carried in the data transmission session management NAS message, the receiving device reads the transmission data carried in the data transmission session management NAS message after determining that the session management NAS message is the data transmission session management NAS message according to the PDU session identifier; or
And after determining that the session management NAS message is a data transmission session management NAS message according to the indication identifier, the receiving equipment reads the transmission data carried in the data transmission session management NAS message.
In the method, the receiving device can determine that the session management NAS message is the data transmission session management NAS message according to the received indication identifier or the PDU session identifier, read the transmission data carried in the data transmission session management NAS message according to the data transmission session management NAS message, and can accurately read the data after determining that the session management NAS message is the data transmission session management NAS message.
In a possible implementation manner, when the receiving device receives, through an AMF entity, a data transmission session management NAS message and a PDU session identifier sent by the sending device, the receiving device is a terminal, and the receiving device receives, through a mobility management NAS message sent by the AMF entity, the data transmission session management NAS message and the PDU session identifier sent by the sending device; or
The receiving device is an SMF entity, and receives the data transmission session management NAS message and the PDU session identification sent by the AMF entity through a calling service between the SMF entity and the AMF entity.
In the method, when the receiving equipment is the terminal, namely downlink data transmission, the receiving equipment receives the data transmission session management NAS message and the PDU session identification forwarded by the AMF entity, and the data transmission session management NAS message and the PDU session identification are carried in the mobility management NAS message; when the receiving device is an SMF entity, namely uplink data transmission, receiving a data transmission session management NAS message and a PDU session identifier forwarded by an AMF entity through a calling service between the SMF entity and the AMF entity, and giving a specific transmission scheme.
In a fourth aspect, an embodiment of the present invention provides an apparatus for data transmission, where the apparatus includes: a processor, a memory, and a transceiver;
wherein the processor is configured to read a program in the memory and execute:
generating a data transmission session management NAS message containing transmission data, wherein the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message not containing the protocol header;
and sending the data transmission session management NAS message and the PDU session identification to receiving equipment.
In a fifth aspect, an embodiment of the present invention provides a device for data transmission, where the device includes: a processor, a memory, and a transceiver;
wherein the processor is configured to read a program in the memory and execute:
receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and sending the received data transmission session management NAS message and the PDU session identification to receiving equipment.
In a sixth aspect, an embodiment of the present invention provides a device for data transmission, where the device includes: a processor, a memory, and a transceiver;
wherein the processor is configured to read a program in the memory and execute:
receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and reading the transmission data carried in the data transmission session management NAS message, and determining the PDU session corresponding to the transmission data according to the PDU session identification.
In a seventh aspect, an embodiment of the present invention provides a device for data transmission, where the device includes: the device comprises a generating module and a first sending module;
a generating module, configured to generate a data transmission session management NAS message including transmission data, where the data transmission session management NAS message is a session management NAS message that shortens a protocol header or a session management NAS message that does not include a protocol header;
and the first sending module is used for sending the data transmission session management NAS message and the PDU session identification to the receiving equipment.
In an eighth aspect, an embodiment of the present invention provides a device for data transmission, where the device includes: the first receiving module and the second sending module;
the first receiving module is used for receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and the second sending module is used for sending the received data transmission session management NAS message and the PDU session identification to receiving equipment.
In a ninth aspect, an embodiment of the present invention provides a device for data transmission, where the device includes: the second receiving module is used for reading the module;
a second receiving module, configured to receive a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
and the reading module is used for reading the transmission data carried in the data transmission session management NAS message and determining the PDU session corresponding to the transmission data according to the PDU session identification.
In a tenth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of a method for a sending device to perform data transmission, or implements the steps of a method for an AMF entity to perform data transmission, or implements the steps of a method for a receiving device to perform data transmission.
In addition, for technical effects brought by any one implementation manner of the fourth aspect to the tenth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect and the third aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a NextGen network architecture in the prior art;
fig. 2A is a system structure diagram of data transmission according to an embodiment of the present invention;
FIG. 2B is a system block diagram of another data transmission system provided by an embodiment of the present invention;
fig. 3 is a flowchart of a method for uplink data transmission according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for downlink data transmission according to an embodiment of the present invention;
fig. 5 is a structural diagram of a first data transmission apparatus according to an embodiment of the present invention;
fig. 6 is a diagram illustrating a structure of a second data transmission apparatus according to an embodiment of the present invention;
fig. 7 is a structural diagram of a third data transmission apparatus according to an embodiment of the present invention;
fig. 8 is a diagram illustrating a fourth apparatus for data transmission according to an embodiment of the present invention;
fig. 9 is a diagram of a fifth apparatus structure for data transmission according to an embodiment of the present invention;
fig. 10 is a diagram illustrating a sixth apparatus for data transmission according to an embodiment of the present invention;
fig. 11 is a flowchart of a first data transmission method according to an embodiment of the present invention;
fig. 12 is a flowchart of a second data transmission method according to an embodiment of the present invention;
fig. 13 is a flowchart of a third method for data transmission according to an embodiment of the present invention.
Detailed Description
Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.
(1) In the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.
(2) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.
(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The NextGen network needs to consider the support of the communication of the Internet of things, particularly small data transmission; at present, during small data transmission, after a terminal is attached to a network, a PDU session for small data transmission needs to be established, and the PDU session only establishes a control plane connection; when the terminal and the network side equipment perform small data transmission, the terminal carries the small data to be transmitted in a session management NAS message, the session management NAS message is carried in a mobility management NAS message as a load packet and is sent to an AMF entity, and the mobility management NAS message further comprises a PDU session identifier for determining the network side equipment; after receiving the mobile management NAS message, the AMF entity determines network side equipment according to the PDU session identifier, and then sends the session management NAS message to the network side equipment, and the session management NAS message does not need to be analyzed in the process; and after receiving the session management NAS message sent by the AMF entity, the network side equipment analyzes data carried in the session management NAS message and sends the analyzed data to the user plane functional entity.
Wherein, the session management NAS message includes a session management NAS message protocol header, as shown in table 1:
cell Whether it is necessary to select Length of
Protocol identification Must choose 1byte
PDU session identification Must choose 1byte
Message association identifier Must choose 1byte
Session management message name identification Must choose 1byte
TABLE 1
As can be seen from table 1, the protocol header of the session management NAS message carries the PDU session identifier, which is repeated with the PDU session identifier in the mobility management NAS message;
as can be seen from the above, in the small data transmission scheme, two layers of protocol headers of NAS messages are nested outside the small data to be transmitted, one layer is a session management NAS message protocol header, the other layer is a mobility management NAS message protocol header, and part or all of cells in the two layers of NAS message protocol headers are repeated, so that the overhead of an air interface during data transmission is large, but the protocol header in the mobility management NAS message at the outermost layer is necessary, so that the protocol header in the session management NAS message is reduced as much as possible to save the overhead of the air interface.
The invention provides a data transmission session management NAS message during data transmission, wherein the data transmission session management NAS message is an NAS message for shortening a protocol header or a session management NAS message not containing the protocol header and is used for carrying small data to be transmitted, so that the overhead of the protocol header of the session management NAS message is reduced during the data transmission process, and further the air interface overhead during the small data transmission is reduced.
The terminal is a device with a wireless communication function, can be deployed on land, and comprises an indoor or outdoor terminal, a handheld terminal or a vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc.; but also UEs in various forms, Mobile Stations (MSs), the terminal equipment (terminal device).
The network side device is a device for providing a wireless communication function for the terminal, and includes but is not limited to: a gbb in 5G, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B or home node B, HNB), a BaseBand Unit (BBU), a transmission point (TRP), a Transmission Point (TP), a mobile switching center (msc), and the like.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
As shown in fig. 2A, a schematic structural diagram of a system for data transmission according to an embodiment of the present invention specifically includes: a transmitting device 20, a receiving device 40;
the sending device 20 is configured to generate a data transmission session management NAS message including transmission data, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header; and sending the data transmission session management NAS message and a protocol data unit PDU session identification to receiving equipment.
The receiving device 40 is configured to receive and send a data transmission session management NAS message and a PDU session identifier sent by the sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header; and reading the transmission data carried in the data transmission session management NAS message, and determining the PDU session corresponding to the transmission data according to the PDU session identification.
In the embodiment of the present invention, a sending device generates a data transmission session management NAS message including transmission data, where the data transmission session management NAS message is a session management NAS message that shortens a protocol header or a session management NAS message that does not include a protocol header, and sends the data transmission session management NAS message and a PDU session identifier to a receiving device, so that the receiving device receives the data transmission session management NAS message and the PDU session identifier, reads transmission data carried in the data transmission session management NAS message, determines a PDU session corresponding to the transmission data according to the PDU session identifier, and finally forwards the transmission data through the PDU session; because the session management NAS message for data transmission in the invention is the session management NAS message with the shortened protocol header or the session management NAS message without the protocol header, the overhead of the protocol header of the session management NAS message is reduced, and the air interface overhead of data transmission is reduced.
In the embodiment of the present invention, after the sending device determines that the trigger condition is satisfied, the sending device may determine to transmit the transmission data by using the data transmission session management NAS message; after determining to adopt the data transmission session management NAS message, generating a data transmission session management NAS message containing transmission data;
wherein, the sending device is a terminal, and the triggering condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through the narrowband Internet of things base station.
Specifically, when the terminal needs to transmit data, the data to be transmitted is determined to be small data; at this time, the terminal determines to adopt the data transmission session management NAS message for data transmission, further generates a data transmission session management NAS message containing transmission data, and sends the data transmission session management NAS message containing the transmission data to the receiving equipment; or
When the terminal needs to transmit data, determining that the data to be transmitted is small data, and determining that the type of a terminal access network is a narrowband Internet of things; and if the transmission data is small data, the terminal needs to transmit the data through the narrowband internet of things base station, and determines to adopt the data transmission session management NAS message for data transmission, so as to generate a data transmission session management NAS message containing the transmission data, and sends the data transmission session management NAS message containing the transmission data to the receiving equipment.
Wherein, the sending device is a Session Management Function (SMF) entity, and the triggering condition includes part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
Specifically, when the SMF entity needs to perform data transmission, it is determined that transmission data that needs to be transmitted is small data; at this time, the SMF entity determines to perform data transmission by using the data transmission session management NAS message, further generates a data transmission session management NAS message including transmission data, and sends the data transmission session management NAS message including transmission data to the receiving device; or
When the SMF entity needs to transmit data, determining that the data to be transmitted is small data, and determining that the type of a terminal access network for transmitting the data with the SMF entity is a narrowband Internet of things; the SMF entity determines to adopt the data transmission session management NAS message for data transmission according to that the transmission data is small data and the terminal needs to transmit data through the narrowband internet of things base station, so as to generate a data transmission session management NAS message including the transmission data and send the data transmission session management NAS message including the transmission data to the receiving device.
Specifically, a data transfer session management NAS message including transfer data is generated in the following manner:
the first method is as follows: generating a session management NAS message containing data transmission according to a part of cells in a session management NAS message protocol header and the transmission data;
optionally, the sending device selects a part of cells in a session management NAS message protocol header, and generates a session management NAS message including a shortened protocol header according to the selected cells and the transmission data;
as can be seen from table 1, the information element included in the protocol header of the session management NAS message includes a protocol identifier, a PDU session identifier, a message association identifier, and a session management message name identifier; when the sending equipment determines to generate the data transmission session management NAS message, selecting a part from the cell of the session management NAS message protocol header as the protocol header in the data transmission session management NAS message, and randomly selecting a part in the selection process;
in the embodiment of the present invention, the sending device may further select a non-repetitive cell of the protocol header according to comparison with a cell of the protocol header in the mobility management NAS message;
for example, because there is a PDU session identifier in the mobility management NAS message, and the PDU session identifier in the session management NAS message belongs to a redundant cell, when a part of cells are selected from the session management NAS message protocol header, part or all of the protocol identifier, the message association identifier, and the session management message name identifier are selected, and if the protocol identifier, the message association identifier, and the session management message name identifier are selected, a data transmission session management NAS message is generated according to the selected cells and the transmission data; as shown in table 2, the protocol header and the transmission data included in the first data transmission session management NAS message in the embodiment of the present invention are shown;
protocol identification (cell) Must choose 1byte
Message correlation identification (cell) Must choose 1byte
Session management message name identification (cell) Must choose 1byte
Transmitting data Must choose Abyte
TABLE 2
Wherein, the length of the transmission data is determined according to the length of the actually transmitted data.
At this time, the generated data transfer session management NAS is reduced in protocol header cells, that is, the protocol header is shortened, compared to the session management NAS message corresponding to table 1, and therefore the generated data transfer session management NAS message is a session management NAS message with a shortened protocol header.
The second method comprises the following steps: generating the data transmission session management NAS message according to the transmission data;
optionally, the sending device directly generates a session management NAS message that does not include a protocol header according to the transmission data;
since the transport data in the NAS message is only managed for the read session in the data transmission process, the session management NAS message may not include the protocol header, but only include the transport data.
Optionally, the session management NAS message that does not include the protocol header may be the transmission data itself, and send the transmission data and the PDU session identifier to the receiving device.
In a third mode, the data transmission session management NAS message is generated according to the special information element in the session management NAS message protocol header;
optionally, the sending device selects part or all of the special cells in the session management NAS message protocol header, and generates the session management NAS message of the shortened protocol header according to the selected special cells and the transmission data;
wherein the length of the special cell is smaller than the length of a cell of the same type as the special cell in the session management NAS message protocol header.
As can be seen from table 1, the information element included in the protocol header of the session management NAS message includes: the protocol identifier with the length of 1byte, the PDU session identifier with the length of 1byte, the message association identifier with the length of 1byte, and the session management message name identifier with the length of 1byte, so that the special information element may be: a protocol identifier with the length of 1/2 bytes, a PDU session identifier with the length of 1/2 bytes, a message association identifier with the length of 1/2 bytes, and a session management message name identifier with the length of 1/2 bytes; the length of 1/2 bytes is only an example as the special information, and the length may be 1/4 bytes, 1/8 bytes, or the like.
In the first mode, each cell length is 1/2 bytes is taken as a special cell for example, all of the special cells are selected, that is, a protocol identifier with a length of 1/2 bytes, a PDU session identifier with a length of 1/2 bytes, a message association identifier with a length of 1/2 bytes, and a session management message name identifier with a length of 1/2 bytes are selected, as shown in table 3, the protocol header and the transmission data included in the second data transmission session management NAS message in the embodiment of the present invention are selected;
protocol identification (cell) Must choose 1/2byte
PDU conversation mark (cell) Must choose 1/2byte
Message correlation identification (cell) Must choose 1/2byte
Session management message name identification (cell) Must choose 1/2byte
Transmitting data Must choose A byte
TABLE 3
Wherein, the length of the transmission data is determined according to the length of the actually transmitted data.
At this time, the generated data transfer session management NAS message is reduced in protocol header cell length and the protocol header is shortened as compared with the corresponding session management NAS message in table 1, and therefore, the generated data transfer session management NAS message is a session management NAS message with a shortened protocol header.
In the embodiment of the invention, a session management NAS message containing a shortened protocol header can be generated according to the selected cell, the selected special cell and the transmission data;
wherein, the selected cell and the selected special cell can not be the same type.
For example, after selecting the message association identifier, the message association identifier with any length cannot be selected.
As shown in table 4, the protocol header and the transmission data included in the third data transmission session management NAS message in the embodiment of the present invention are shown;
protocol identification (cell) Must choose 1byte
Message correlation identification (cell) Must choose 1/2byte
Session management message name identification (cell) Must choose 1/4byte
Transmitting data Must choose Abyte
TABLE 4
Wherein, the length of the transmission data is determined according to the length of the actually transmitted data.
At this time, the generated data transfer session management NAS not only reduces the number of cells but also shortens the length of a part of cells in the selected cells compared with the protocol header of the session management NAS message corresponding to table 1, so the generated data transfer session management NAS message is the session management NAS message with the shortened protocol header.
It should be noted that the data transport session management NAS messages cannot include protocol headers of the same type when being generated, and specifically, which manner is used to generate the data transport session management NAS messages is determined according to the provision deployed in the transport protocol. There are also a variety of data transport session management NAS messages not listed.
In implementation, after determining that the transmission data is small data and/or the terminal logs in the network through the narrowband internet of things base station, the sending device determines to transmit the transmission data by using the data transmission session management NAS message, and generates a data transmission session management NAS message used when transmitting the transmission data according to the selected cell and/or the selected special cell and the transmission data, so as to accurately determine whether to use the data transmission session management NAS message, which can not only smoothly perform data transmission, but also reduce air interface overhead generated during data transmission.
As shown in fig. 2B, which is a schematic structural diagram of a second data transmission system according to an embodiment of the present invention, the data transmission system further includes an AMF entity 30;
the AMF entity 30 is configured to receive a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header; and sending the received data transmission session management NAS message and the PDU session identification to receiving equipment.
Specifically, when the sending device sends the data transmission session management NAS message and the PDU session identifier to the receiving device, the sending device sends the data transmission session management NAS message and the PDU session identifier to the AMF entity, and sends the data transmission session management NAS message and the PDU session identifier to the receiving device through the AMF entity;
correspondingly, after receiving the data transmission session management NAS message and the PDU session identification sent by the sending equipment, the AMF entity determines corresponding receiving equipment according to the PDU session identification and sends the data transmission session management NAS message and the PDU session identification to the receiving equipment;
further, the receiving device receives, through the AMF entity, the data transmission session management NAS message and the PDU session identifier sent by the sending device, that is, receives the data transmission session management NAS message and the PDU session identifier sent by the AMF entity.
The data transmission session management NAS message and the PDU session identifier sent by the AMF entity are received by the AMF entity from the sending device, so that the AMF entity is mainly used for forwarding and transmitting data between the sending device and the receiving device.
In implementation, the AMF entity is configured to forward the received NAS message for data transmission session management and the PDU session identifier sent by the sending device to the receiving device, so that the receiving device can smoothly receive the NAS message for data transmission session management and the PDU session identifier sent by the sending device and forward the NAS message for data transmission session management and the PDU session identifier to the receiving device.
When data transmission is carried out, uplink data transmission and downlink data transmission exist, and when the uplink data transmission is carried out, the sending equipment is a terminal and the receiving equipment is an SMF entity; when downlink data transmission is carried out, the sending equipment is an SMF entity, and the receiving equipment is a terminal; the specific data transmission process is shown in the following examples.
The first embodiment is as follows: and transmitting uplink data.
In an embodiment of the invention, the terminal has attached to the network and established a PDU session for small data transfer. And the terminal and the SMF entity synchronize the PDU session information used for small data transmission and/or synchronize the information whether the terminal accesses the network through the narrowband Internet of things base station in the PDU session establishment process.
The PDU session is used for small data transmission when the terminal and the SMF entity are synchronized in the PDU session establishing process, or whether the terminal accesses a network through a narrowband Internet of things base station is also synchronized, so that whether the terminal transmits data through the narrowband Internet of things base station is determined, after the SMF entity receives the PDU session identification, the PDU session identification can be determined to be used for small data transmission, and the received session management NAS message is determined to be a data transmission session management NAS message;
meanwhile, the session management NAS message can be indicated to be a data transmission session management NAS message by using an indication mark, and when the information received by the SMF entity has the indication mark, the received session management NAS message can be determined to be the data transmission session management NAS message;
the following description will be made separately for the above two cases.
The first condition is as follows: the PDU session identifier is used for indicating the NAS message as a data transmission session management NAS message.
After determining that transmission data needs to be transmitted, the terminal judges whether the transmission data is small data or not, or determines whether the terminal transmits the data through a narrowband Internet of things base station or not;
the terminal determines that the transmission data is small data, and then determines to adopt a data transmission session management (NAS) message to transmit the transmission data; or
And the terminal determines that the transmission data is small data and determines that the terminal transmits the data through the narrowband Internet of things base station, and then determines to transmit the transmission data by adopting the data transmission session management NAS message.
The terminal generates a data transmission session management NAS message containing the transmission data, carries the data transmission session management NAS message and a PDU session identification in a mobility management NAS message and sends the NAS message and the PDU session identification to the AMF entity;
the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message which does not contain the protocol header;
correspondingly, the AMF entity receives the data transmission session management NAS message and the PDU session identification sent by the terminal, determines the SMF entity according to the received PDU session identification, and sends the data transmission session management NAS message and the PDU session identification to the SMF entity through a calling service between the SMF entity and the AMF entity;
further, the SMF entity receives a data transmission session management NAS message and a PDU session identifier sent by the AMF entity through a calling service between the SMF entity and the AMF entity;
the PDU session identifier is used for indicating that a session management NAS message is a data transmission session management NAS message;
after receiving the PDU session identification, the SMF entity determines that the PDU session identification is used for small data transmission according to the synchronous information of the terminal and the SMF entity, and further determines that the received session management NAS message is a data transmission session management NAS message;
after the SMF entity determines the transmission data, the SMF entity forwards the transmission data to the UPF entity determined according to the PDU session identification, so that the UPF entity and an external data network carry out the transmission data interaction.
Case two: the indication mark is used for indicating the NAS message to be a data transmission session management NAS message.
After generating a data transmission session management NAS message containing transmission data, the terminal carries the data transmission session management NAS message, a PDU session identifier and an indication identifier for indicating that the NAS message is the data transmission session management NAS message in a mobile management NAS message and sends the mobile management NAS message to an AMF entity;
the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message which does not contain the protocol header;
correspondingly, the AMF entity receives a mobile management NAS message which is sent by the terminal and contains the data transmission session management NAS message, a PDU session identifier and an indication identifier for indicating that the NAS message is the data transmission session management NAS message; determining an SMF entity according to the PDU session identifier, and sending the data transmission session management NAS message, the PDU session identifier and an indication identifier for indicating that the NAS message is the data transmission session management NAS message to the SMF entity determined according to the PDU session identifier through a calling service between the SMF entity and the AMF entity;
further, the SMF entity receives a data transmission session management NAS message, a PDU session identifier and an indication identifier for indicating that the NAS message is a data transmission session management NAS message, which are sent by the AMF entity, through a call service between the SMF entity and the AMF entity; the SMF entity determines that the received session management NAS message is a data transmission session management NAS message according to the indication identifier, analyzes the received data transmission session management NAS message according to the data transmission session management NAS message specified in a transmission protocol, reads transmission data in the data transmission session management NAS message, and determines a PDU session corresponding to the transmission data according to the PDU session identifier;
after the SMF entity determines the transmission data, the SMF entity forwards the transmission data to the UPF entity determined according to the PDU session identification, so that the UPF entity and an external data network carry out the transmission data interaction.
As shown in fig. 3, a flowchart of a method for uplink data transmission according to an embodiment of the present invention specifically includes the following steps:
step 300, after determining that the NAS message is managed by adopting the data transmission session, the terminal generates a data transmission session management NAS message containing transmission data;
step 310, the terminal takes the data transmission session management NAS message containing the transmission data as a load packet and carries a PDU session identifier in a mobility management NAS message, and sends the mobility management NAS message to an AMF entity;
the mobility management NAS message may further include an indication identifier for indicating that the NAS message is a data transmission session management NAS message;
step 320, the AMF entity determines the SMF entity according to the received PDU session identification;
step 330, the AMF entity sends the data transmission session management NAS message and the PDU session identifier to the SMF entity through a call service between the SMF entity and the AMF entity;
optionally, the AMF entity sends an indication identifier for indicating that the NAS message is a data transmission session management NAS message, together with the data transmission session management NAS message and the PDU session identifier, to the SMF entity.
Step 340, the SMF entity determines the received session management NAS message as a data transmission session management NAS message according to the received PDU session identifier, reads the transmission data in the data transmission session management NAS message, and determines the PDU session corresponding to the transmission data according to the PDU session identifier;
optionally, the SMF entity determines, according to the indication identifier, that the received session management NAS message is a data transmission session management NAS message.
And step 350, the SMF entity forwards the transmission data to the UPF entity.
Example two: and (5) downlink data transmission.
In an embodiment of the invention, the terminal is already attached to the network and a PDU session for small data transfer is established. The terminal and the SMF entity synchronize the PDU session information used for small data transmission and/or synchronize the information whether the terminal accesses the network through the narrowband Internet of things base station in the PDU session establishment process.
In the same embodiment one, the receiving device in embodiment two may also determine, according to the PDU session identifier, that the received session management NAS message is a data transmission session management NAS message, or determine, according to the indication identifier, that the received session management NAS message is a data transmission session management NAS message; the following are described separately.
The first condition is as follows: the PDU session identifier is used for indicating the NAS message as a data transmission session management NAS message.
The SMF entity receives transmission data sent by the UPF entity through the PDU session connection, wherein the transmission data is obtained by the UPF entity from an external network.
After receiving the transmission data, the SMF entity determines whether a PDU session corresponding to the PDU session connection used when receiving the transmission data is information for small data transmission, if the PDU session corresponding to the PDU session connection used is information for small data transmission, the transmission data is determined to be small data, and at the moment, the transmission data is determined to be transmitted by adopting a data transmission session management NAS message; or
And the SMF entity determines that the transmission data are small data, and determines that a data transmission terminal with the SMF entity transmits data through a narrowband Internet of things base station, and then determines to adopt a data transmission session management (NAS) message to transmit the transmission data.
The SMF entity generates a data transmission session management NAS message containing the transmission data, and sends the data transmission session management NAS message and a PDU session identifier to the AMF entity through a calling service between the SMF entity and the AMF entity;
the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message which does not contain the protocol header;
correspondingly, the AMF receives a data transmission session management NAS message and a PDU session identifier sent by the SMF entity through a calling service between the SMF entity and the AMF entity, and determines a terminal corresponding to the PDU session identifier according to the PDU session identifier;
the AMF entity carries the data transmission session management NAS message and the PDU session identification in a mobile management NAS message in a load packet mode and sends the data transmission session management NAS message and the PDU session identification to a terminal determined according to the PDU session identification;
further, the terminal receives a data transmission session management NAS message and a PDU session identifier in a mobility management NAS message sent by the AMF entity;
the PDU session identifier is used for indicating that a session management NAS message is a data transmission session management NAS message;
after receiving the PDU session identification, the terminal determines that the PDU session identification is used for small data transmission according to the synchronous information of the terminal and the SMF entity, and further determines that the received session management NAS message is a data transmission session management NAS message;
and after the terminal determines the transmission data, forwarding the transmission data to a session management layer of the terminal for processing, wherein the session management layer of the terminal is determined according to the PDU session identifier.
Case two: the indication mark is used for indicating the NAS message to be a data transmission session management NAS message.
After the SMF entity generates a data transmission session management NAS message containing transmission data, the data transmission session management NAS message, a PDU session identifier and an indication identifier for indicating that the NAS message is the data transmission session management NAS message are sent to the AMF entity through a calling service between the SMF entity and the AMF entity;
the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message which does not contain the protocol header;
correspondingly, the AMF entity receives a message which is sent by the SMF entity and contains the NAS message for managing the data transmission session, a PDU session identifier and an indication identifier for indicating that the NAS message is the NAS message for managing the data transmission session; determining a terminal corresponding to the PDU session identifier according to the PDU session identifier, carrying the data transmission session management NAS message, the PDU session identifier and an indication identifier for indicating that the NAS message is the data transmission session management NAS message in a mobile management NAS message in a load packet mode, and sending the mobile management NAS message to the terminal determined according to the PDU session identifier;
further, the terminal receives a data transmission session management NAS message, a PDU session identifier and an indication identifier for indicating that the NAS message is the data transmission session management NAS message in a mobility management NAS message sent by the AMF entity; the terminal determines the received session management NAS message as a data transmission session management NAS message according to the indication identifier, analyzes the received data transmission session management NAS message according to the data transmission session management NAS message specified in a transmission protocol, reads transmission data in the data transmission session management NAS message, and determines a PDU session corresponding to the transmission data according to the PDU session identifier;
and after the terminal determines the transmission data, forwarding the transmission data to a session management layer of the terminal for processing, wherein the session management layer of the terminal is determined according to the PDU session identifier.
As shown in fig. 4, a flowchart of a method for downlink data transmission according to an embodiment of the present invention specifically includes the following steps:
step 400, the SMF entity receives transmission data sent by the UPF entity through PDU session connection;
wherein the transmission data is obtained by the UPF entity from an external data network;
step 410, after the SMF entity determines to adopt the data transmission session management NAS message, a data transmission session management NAS message containing transmission data is generated;
step 420, the SMF entity sends the data transmission session management NAS message and the PDU session identifier to the AMF entity through a call service between the SMF entity and the AMF entity;
the indication identifier for indicating that the NAS message is a data transmission session management NAS message can be sent to the AMF entity together with the data transmission session management NAS message and the PDU session identifier;
step 430, the AMF entity determines a terminal corresponding to the PDU session identifier according to the received PDU session identifier;
step 440, the AMF entity carries the data transmission session management NAS message and the PDU session identifier in a mobility management NAS message in a form of a payload packet, and sends the mobility management NAS message to the terminal;
optionally, the AMF entity sends an indication identifier for indicating that the NAS message is a data transmission session management NAS message, together with the data transmission session management NAS message and the PDU session identifier, to the terminal.
Step 450, the terminal determines the received session management NAS message as a data transmission session management NAS message according to the received PDU session identification, reads transmission data in the data transmission session management NAS message, and determines a PDU session corresponding to the transmission data according to the PDU session identification; and forwarding the transmission data to a session management layer of the terminal for processing.
Optionally, the terminal determines, according to the indication identifier, that the received session management NAS message is a data transmission session management NAS message.
In the embodiment of the present invention, when information such as a data transmission session management NAS message and a PDU session identifier is transmitted between an SMF entity and the AMF entity, the transmission data is transmitted between the SMF entity and the AMF entity through a call service corresponding to an N11 interface.
As shown in fig. 5, a first data transmission apparatus provided in an embodiment of the present invention includes a processor 500, a memory 501, and a transceiver 502;
the processor 500 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 500 in performing operations. The transceiver 502 is used to receive and transmit data under the control of the processor 500.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 500 and various circuits of memory represented by memory 501 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 500 in performing operations.
The processes disclosed in the embodiments of the present invention may be applied to the processor 500, or implemented by the processor 500. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 500. The processor 500 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 501, and the processor 500 reads the information in the memory 501, and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 500 is configured to read the program in the memory 501 and execute:
generating a data transmission session management NAS message containing transmission data, wherein the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message not containing the protocol header;
and sending the data transmission session management NAS message and the PDU session identification to receiving equipment.
Optionally, the processor 500 is specifically configured to:
and sending the data transmission session management NAS message and the PDU session identification to an AMF entity, and sending the data transmission session management NAS message and the PDU session identification to the receiving equipment through the AMF entity.
Optionally, the processor 500 is further configured to:
determining to adopt the data transmission session management NAS message to transmit the transmission data after determining that the triggering condition is met;
wherein, the device is a terminal, and the trigger condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through a narrowband Internet of things base station; or
The device is an SMF entity, and the trigger condition comprises part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
Optionally, the processor 500 is specifically configured to:
selecting part of cells in a session management NAS message protocol header, and generating a session management NAS message containing a shortened protocol header according to the selected cells and the transmission data; or
Directly generating a session management NAS message which does not contain a protocol header according to the transmission data; or
Selecting part or all of special cells in a session management NAS message protocol header, and generating a session management NAS message of the shortened protocol header according to the selected special cells and the transmission data; wherein the length of the special cell is smaller than the length of a cell of the same type as the special cell in the session management NAS message protocol header.
Optionally, the session management NAS message that does not include the protocol header is the transport data.
Optionally, the processor 500 is further configured to:
and sending an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message to the AMF entity together with the data transmission session management NAS message and the PDU session identifier.
Optionally, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
Optionally, the processor 500 is specifically configured to:
the equipment is a terminal, carries the data transmission session management NAS message and the PDU session identification in a mobility management NAS message and sends the NAS message to the AMF entity; or
The device is an SMF entity, and the data transmission session management NAS message and the PDU session identification are sent to the AMF entity through a call service between the SMF entity and the AMF entity. As shown in fig. 6, a second data transmission apparatus provided in an embodiment of the present invention includes: a generating module 600, a first sending module 610;
the generating module 600 is configured to generate a data transmission session management NAS message including transmission data, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
the first sending module 610 is configured to send the NAS message for data transmission session management and a PDU session identifier to a receiving device.
As shown in fig. 7, a third data transmission apparatus provided in the embodiment of the present invention includes a processor 700, a memory 701, and a transceiver 702;
the processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 may store data used by the processor 700 in performing operations. The transceiver 702 is used to receive and transmit data under the control of the processor 700.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 700, and various circuits, represented by memory 701, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 may store data used by the processor 700 in performing operations.
The processes disclosed in the embodiments of the present invention may be applied to the processor 700, or implemented by the processor 700. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 700. The processor 700 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 701, and the processor 700 reads the information in the memory 701, and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 700 is configured to read the program in the memory 701 and execute:
receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and sending the received data transmission session management NAS message and the PDU session identification to receiving equipment.
Optionally, the processor 700 is further configured to:
and sending an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message, together with the data transmission session management NAS message and the PDU session identifier, to the receiving device.
Optionally, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
Optionally, the processor 700 is specifically configured to:
the sending equipment is a terminal and sends the received data transmission session management NAS message and the PDU session identification to the receiving equipment through a calling service between the SMF entity and the AMF entity; or
And the sending equipment is an SMF entity, and carries the data transmission session management NAS message and the PDU session identification in a mobility management NAS message and sends the message to the receiving equipment.
As shown in fig. 8, a fourth data transmission apparatus provided in an embodiment of the present invention includes: a first receiving module 800, a second transmitting module 810;
the first receiving module 800 is configured to receive a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
the second sending module 810 is configured to send the received NAS message for data transmission session management and the PDU session identifier to a receiving device.
As shown in fig. 9, a fifth data transmission apparatus provided in an embodiment of the present invention includes a processor 900, a memory 901, and a transceiver 902;
the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 may store data used by the processor 900 in performing operations. The transceiver 902 is used for receiving and transmitting data under the control of the processor 900.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 901, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 may store data used by the processor 900 in performing operations.
The processes disclosed in the embodiments of the present invention may be applied to the processor 900, or implemented by the processor 900. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 900. The processor 900 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 901, and the processor 900 reads the information in the memory 901 and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 900 is configured to read a program in the memory 901 and execute:
receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
and reading the transmission data carried in the data transmission session management NAS message, and determining the PDU session corresponding to the transmission data according to the PDU session identification.
Optionally, the processor 900 is specifically configured to:
and receiving the data transmission session management NAS message and the PDU session identification sent by the sending equipment through the AMF entity.
Optionally, the processor 900 is further configured to:
receiving, by the AMF entity, an indication identifier sent by the sending device, where the indication identifier is used to indicate that a session management NAS message is a data transmission session management NAS message;
wherein the indication identifier is received with the data transport session management, NAS, message and the PDU session identifier.
Optionally, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
Optionally, the processor 900 is further configured to:
after determining that the session management NAS message is a data transmission session management NAS message according to the PDU session identifier, reading transmission data carried in the data transmission session management NAS message; or
And after determining that the session management NAS message is a data transmission session management NAS message according to the indication mark, reading transmission data carried in the data transmission session management NAS message.
Optionally, the processor 900 is specifically configured to:
the equipment is a terminal, and receives a data transmission session management NAS message and a PDU session identifier sent by the sending equipment through a mobility management NAS message sent by the AMF entity; or
The equipment is an SMF entity, and receives a data transmission session management NAS message and a PDU session identifier sent by the AMF entity through a calling service between the SMF entity and the AMF entity.
As shown in fig. 10, an apparatus for data transmission according to an embodiment of the present invention includes: a second receiving module 1000, a reading module 1010;
the second receiving module 1000 is configured to receive a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
the reading module 1010 is configured to read the transmission data carried in the data transmission session management NAS message, and determine, according to the PDU session identifier, a PDU session corresponding to the transmission data.
Based on the same inventive concept, the embodiment of the present invention further provides a data transmission method, and since the device corresponding to the method is the device for data transmission in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the method can refer to the implementation of the device, and repeated details are not repeated.
As shown in fig. 11, a flowchart of a first data transmission method provided in the embodiment of the present invention specifically includes the following steps:
step 1100, a sending device generates a data transmission session management NAS message containing transmission data, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
step 1110, the sending device sends the NAS message for data transmission session management and the PDU session identifier to a receiving device.
Optionally, the sending device sends the NAS message for data transmission session management and the PDU session identifier to the receiving device, including:
and the sending equipment sends the data transmission session management NAS message and the PDU session identification to an AMF entity and sends the NAS message and the PDU session identification to the receiving equipment through the AMF entity.
Optionally, before the sending device generates a data transmission session management NAS message including transmission data, the method further includes:
after the sending equipment determines that the triggering condition is met, determining to adopt the data transmission session management NAS message to transmit the transmission data;
wherein, the sending device is a terminal, and the triggering condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through a narrowband Internet of things base station; or
The sending device is a Session Management Function (SMF) entity, and the triggering conditions include part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
Optionally, the generating, by the sending device, a data transmission session management NAS message including transmission data includes:
the sending equipment selects part of cells in a session management NAS message protocol header and generates a session management NAS message containing a shortened protocol header according to the selected cells and the transmission data; or
The sending equipment directly generates a session management NAS message which does not contain a protocol header according to the transmission data; or
The sending equipment selects part or all of special cells in a session management NAS message protocol header, and generates a session management NAS message of the shortened protocol header according to the selected special cells and the transmission data; wherein the length of the special cell is smaller than the length of a cell of the same type as the special cell in the session management NAS message protocol header.
Optionally, the session management NAS message that does not include the protocol header is the transport data.
Optionally, the sending device sends the NAS message for data transmission session management and the PDU session identifier to the AMF entity, further including:
and the sending equipment sends an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message to the AMF entity together with the data transmission session management NAS message and the PDU session identifier.
Optionally, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
Optionally, the sending device sends the NAS message for data transmission session management and the PDU session identifier to the AMF entity, including:
the sending equipment is a terminal, and carries the data transmission session management NAS message and the PDU session identification in a mobility management NAS message and sends the NAS message to the AMF entity; or
The sending device is an SMF entity, and the sending device sends the data transmission session management NAS message and the PDU session identification to the AMF entity through a call service between the SMF entity and the AMF entity.
Based on the same inventive concept, the embodiment of the present invention further provides a data transmission method, and since the device corresponding to the method is a data transmission device in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the method may refer to the implementation of the device, and repeated details are not repeated.
As shown in fig. 12, a flowchart of a second data transmission method provided in the embodiment of the present invention specifically includes the following steps:
step 1200, an AMF entity receives a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
step 1210, the AMF entity sends the received NAS message for data transmission session management and the PDU session identifier to a receiving device.
Optionally, the receiving, by the AMF entity, the data transmission session management NAS message and the PDU session identifier sent by the sending device further includes:
and the AMF entity sends an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message to the receiving equipment together with the data transmission session management NAS message and the PDU session identifier.
Optionally, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
Optionally, the sending, by the AMF entity, the received NAS message for data transmission session management and the PDU session identifier to a receiving device includes:
the sending device is a terminal, and the AMF entity sends the received data transmission session management NAS message and the PDU session identification to the receiving device through a calling service between the SMF entity and the AMF entity; or
The sending device is an SMF entity, and the AMF entity carries the data transmission session management NAS message and the PDU session identifier in a mobility management NAS message and sends the message to the receiving device.
Based on the same inventive concept, the embodiment of the present invention further provides a data transmission method, and since the device corresponding to the method is a data transmission device in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the method may refer to the implementation of the device, and repeated details are not repeated.
As shown in fig. 13, a flowchart of a third method for data transmission according to an embodiment of the present invention specifically includes the following steps:
step 1300, a receiving device receives a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header;
step 1310, the receiving end device reads the transmission data carried in the data transmission session management NAS message, and determines the PDU session corresponding to the transmission data according to the PDU session identifier.
Optionally, the receiving device receives the NAS message for managing the data transmission session and the PDU session identifier sent by the sending device, including:
and the receiving equipment receives the data transmission session management NAS message and the PDU session identification sent by the sending equipment through the AMF entity.
Optionally, the receiving device receives, through the AMF entity, the data transmission session management NAS message and the PDU session identifier sent by the sending device, and further includes:
the receiving device receives an indication identifier which is sent by the sending device and used for indicating that the session management NAS message is a data transmission session management NAS message through the AMF entity;
wherein the indication identifier is received with the data transport session management, NAS, message and the PDU session identifier.
Optionally, the PDU session identifier is used to indicate that the session management NAS message is a data transmission session management NAS message.
Optionally, after the receiving device receives the NAS message for data transmission session management sent by the sending device, before reading the transmission data carried in the NAS message for data transmission session management, the method further includes:
after determining that the session management NAS message is a data transmission session management NAS message according to the PDU session identifier, the receiving equipment reads transmission data carried in the data transmission session management NAS message; or
And after determining that the session management NAS message is a data transmission session management NAS message according to the indication identifier, the receiving equipment reads the transmission data carried in the data transmission session management NAS message.
Optionally, the receiving device receives, through the AMF entity, the data transmission session management NAS message and the PDU session identifier sent by the sending device, where the receiving device includes:
the receiving equipment is a terminal, and receives the data transmission session management NAS message and the PDU session identification sent by the sending equipment through the mobile management NAS message sent by the AMF entity; or
The receiving device is an SMF entity, and receives the data transmission session management NAS message and the PDU session identification sent by the AMF entity through a calling service between the SMF entity and the AMF entity.
Embodiments of the present invention also provide a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in fig. 11 above, or implements the steps of the method described in fig. 12 above, or implements the steps of the method described in fig. 13 above.
The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.
Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (38)

1. A method of data transmission, the method comprising:
the sending equipment generates a data transmission session management non-access stratum (NAS) message containing transmission data, wherein the NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header;
the sending equipment sends the data transmission session management NAS message and a Protocol Data Unit (PDU) session identification to receiving equipment;
before the sending device generates a data transport session management NAS message including transport data, the method further includes:
after the sending equipment determines that the triggering condition is met, determining to adopt the data transmission session management NAS message to transmit the transmission data;
wherein, the sending device is a terminal, and the triggering condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through a narrowband Internet of things base station; or
The sending device is a Session Management Function (SMF) entity, and the triggering conditions include part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
2. The method of claim 1, wherein the sending device sending the data transfer session management NAS message and the PDU session identification to a receiving device, comprises:
and the sending equipment sends the data transmission session management NAS message and the PDU session identification to an AMF entity and sends the NAS message and the PDU session identification to the receiving equipment through the AMF entity.
3. The method of claim 1, wherein the sending device generating a data transport session management, NAS, message containing transport data comprises:
the sending equipment selects part of cells in a session management NAS message protocol header and generates a session management NAS message containing a shortened protocol header according to the selected cells and the transmission data; or
The sending equipment directly generates a session management NAS message which does not contain a protocol header according to the transmission data; or
The sending equipment selects part or all of special cells in a session management NAS message protocol header, and generates a session management NAS message of the shortened protocol header according to the selected special cells and the transmission data; wherein the length of the special cell is smaller than the length of a cell of the same type as the special cell in the session management NAS message protocol header.
4. The method of claim 1, wherein the session management NAS message that does not include a protocol header is the transport data.
5. The method of claim 2, wherein the sending device sends the data transfer session management NAS message and the PDU session identification to an AMF entity, further comprising:
and the sending equipment sends an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message to the AMF entity together with the data transmission session management NAS message and the PDU session identifier.
6. The method of claim 1, wherein the PDU session identification is used to indicate that a session management NAS message is a data transport session management NAS message.
7. The method of claim 2, wherein the sending device sending the data transfer session management NAS message and the PDU session identification to the AMF entity, comprises:
the sending equipment is a terminal, and carries the data transmission session management NAS message and the PDU session identification in a mobility management NAS message and sends the NAS message to the AMF entity; or
The sending device is an SMF entity, and the sending device sends the data transmission session management NAS message and the PDU session identification to the AMF entity through a call service between the SMF entity and the AMF entity.
8. A method of data transmission, the method comprising:
the AMF entity receives a data transmission session management NAS message and a PDU session identification sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header; the NAS message is the NAS message which is generated after the sending equipment determines that the data transmission session management NAS message is adopted to transmit the transmission data after determining that the triggering condition is met; when the sending device is a terminal, the triggering condition includes: the transmission data is small data; the terminal needs to transmit at least one of data through the narrowband Internet of things base station; when the sending device is a Session Management Function (SMF) entity, the triggering condition includes: the transmission data is small data; a terminal performing data transmission with the SMF entity needs to transmit at least one of data through a narrowband Internet of things base station;
and the AMF entity sends the received data transmission session management NAS message and the PDU session identification to receiving equipment.
9. The method of claim 8, wherein the AMF entity receives a data transmission session management NAS message and a PDU session identifier sent by a sending device, further comprising:
and the AMF entity sends an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message to the receiving equipment together with the data transmission session management NAS message and the PDU session identifier.
10. The method of claim 8, wherein the PDU session identification is used to indicate that a session management NAS message is a data transport session management NAS message.
11. The method of claim 8, wherein the AMF entity sending the received data transfer session management NAS message and the PDU session identifier to a receiving device, comprises:
the sending device is a terminal, and the AMF entity sends the received data transmission session management NAS message and the PDU session identification to the receiving device through a calling service between the SMF entity and the AMF entity; or
The sending device is an SMF entity, and the AMF entity carries the data transmission session management NAS message and the PDU session identifier in a mobility management NAS message and sends the message to the receiving device.
12. A method of data transmission, the method comprising:
receiving data transmission session management NAS information and a PDU session identification sent by sending equipment by receiving equipment, wherein the data transmission session management NAS information is session management NAS information of a shortened protocol header or session management NAS information which does not contain the protocol header; the NAS message is the NAS message which is generated after the sending equipment determines that the data transmission session management NAS message is adopted to transmit the transmission data after determining that the triggering condition is met; when the sending device is a terminal, the triggering condition includes: the transmission data is small data; the terminal needs to transmit at least one of data through the narrowband Internet of things base station; when the sending device is a Session Management Function (SMF) entity, the triggering condition includes: the transmission data is small data; a terminal performing data transmission with the SMF entity needs to transmit at least one of data through a narrowband Internet of things base station;
and the receiving terminal equipment reads the transmission data carried in the data transmission session management NAS message and determines the PDU session corresponding to the transmission data according to the PDU session identification.
13. The method of claim 12, wherein the receiving device receives a data transmission session management NAS message and a PDU session identifier sent by a sending device, comprising:
and the receiving equipment receives the data transmission session management NAS message and the PDU session identification sent by the sending equipment through the AMF entity.
14. The method of claim 13, wherein the receiving device receives, through the AMF entity, the data transfer session management NAS message and the PDU session identifier sent by the sending device, further comprising:
the receiving device receives an indication identifier which is sent by the sending device and used for indicating that the session management NAS message is a data transmission session management NAS message through the AMF entity;
wherein the indication identifier is received with the data transport session management, NAS, message and the PDU session identifier.
15. The method of claim 12, wherein the PDU session identification is used to indicate that a session management NAS message is a data transport session management NAS message.
16. The method according to any one of claims 14 to 15, wherein after the receiving device receives the NAS message for data transmission session management sent by the sending device, and before reading the transmission data carried in the NAS message for data transmission session management, the method further includes:
after determining that the session management NAS message is a data transmission session management NAS message according to the PDU session identifier, the receiving equipment reads transmission data carried in the data transmission session management NAS message; or
And after determining that the session management NAS message is a data transmission session management NAS message according to the indication identifier, the receiving equipment reads the transmission data carried in the data transmission session management NAS message.
17. The method of claim 13, wherein the receiving device receives, through the AMF entity, the data transfer session management NAS message and the PDU session identifier sent by the sending device, and includes:
the receiving equipment is a terminal, and receives the data transmission session management NAS message and the PDU session identification sent by the sending equipment through the mobile management NAS message sent by the AMF entity; or
The receiving device is an SMF entity, and receives the data transmission session management NAS message and the PDU session identification sent by the AMF entity through a calling service between the SMF entity and the AMF entity.
18. An apparatus for data transmission, the apparatus comprising: a processor, a memory, and a transceiver;
wherein the processor is configured to read a program in the memory and execute:
generating a data transmission session management NAS message containing transmission data, wherein the data transmission session management NAS message is a session management NAS message of a shortened protocol header or a session management NAS message not containing the protocol header;
sending the data transmission session management NAS message and the PDU session identification to receiving equipment;
wherein the processor is further configured to:
determining to adopt the data transmission session management NAS message to transmit the transmission data after determining that the triggering condition is met;
wherein, the device is a terminal, and the trigger condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through a narrowband Internet of things base station; or
The device is an SMF entity, and the trigger condition comprises part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
19. The device of claim 18, wherein the processor is specifically configured to:
and sending the data transmission session management NAS message and the PDU session identification to an AMF entity, and sending the data transmission session management NAS message and the PDU session identification to the receiving equipment through the AMF entity.
20. The device of claim 18, wherein the processor is specifically configured to:
selecting part of cells in a session management NAS message protocol header, and generating a session management NAS message containing a shortened protocol header according to the selected cells and the transmission data; or
Directly generating a session management NAS message which does not contain a protocol header according to the transmission data; or
Selecting part or all of special cells in a session management NAS message protocol header, and generating a session management NAS message of the shortened protocol header according to the selected special cells and the transmission data; wherein the length of the special cell is smaller than the length of a cell of the same type as the special cell in the session management NAS message protocol header.
21. The apparatus of claim 20, wherein the session management NAS message that does not include a protocol header is the transport data.
22. The device of claim 19, wherein the processor is further configured to:
and sending an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message to the AMF entity together with the data transmission session management NAS message and the PDU session identifier.
23. The apparatus of claim 18, wherein the PDU session identification is for indicating that a session management NAS message is a data transport session management NAS message.
24. The device of claim 18, wherein the processor is specifically configured to:
the equipment is a terminal, carries the data transmission session management NAS message and the PDU session identification in a mobility management NAS message and sends the NAS message to an AMF entity; or
The device is an SMF entity, and the data transmission session management NAS message and the PDU session identification are sent to the AMF entity through a call service between the SMF entity and the AMF entity.
25. An apparatus for data transmission, the apparatus comprising: a processor, a memory, and a transceiver;
wherein the processor is configured to read a program in the memory and execute:
receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header; the NAS message is the NAS message which is generated after the sending equipment determines that the data transmission session management NAS message is adopted to transmit the transmission data after determining that the triggering condition is met; when the sending device is a terminal, the triggering condition includes: the transmission data is small data; the terminal needs to transmit at least one of data through the narrowband Internet of things base station; when the sending device is a Session Management Function (SMF) entity, the triggering condition includes: the transmission data is small data; a terminal performing data transmission with the SMF entity needs to transmit at least one of data through a narrowband Internet of things base station;
and sending the received data transmission session management NAS message and the PDU session identification to receiving equipment.
26. The device of claim 25, wherein the processor is further configured to:
and sending an indication identifier for indicating that the session management NAS message is a data transmission session management NAS message, together with the data transmission session management NAS message and the PDU session identifier, to the receiving device.
27. The apparatus of claim 25, wherein the PDU session identification is for indicating that a session management NAS message is a data transport session management NAS message.
28. The device of claim 25, wherein the processor is specifically configured to:
the sending equipment is a terminal and sends the received data transmission session management NAS message and the PDU session identification to the receiving equipment through a calling service between the SMF entity and the AMF entity; or
And the sending equipment is an SMF entity, and carries the data transmission session management NAS message and the PDU session identification in a mobility management NAS message and sends the message to the receiving equipment.
29. An apparatus for data transmission, the apparatus comprising: a processor, a memory, and a transceiver;
wherein the processor is configured to read a program in the memory and execute:
receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header; the NAS message is the NAS message which is generated after the sending equipment determines that the data transmission session management NAS message is adopted to transmit the transmission data after determining that the triggering condition is met; when the sending device is a terminal, the triggering condition includes: the transmission data is small data; the terminal needs to transmit at least one of data through the narrowband Internet of things base station; when the sending device is a Session Management Function (SMF) entity, the triggering condition includes: the transmission data is small data; a terminal performing data transmission with the SMF entity needs to transmit at least one of data through a narrowband Internet of things base station;
and reading the transmission data carried in the data transmission session management NAS message, and determining the PDU session corresponding to the transmission data according to the PDU session identification.
30. The device of claim 29, wherein the processor is specifically configured to:
and receiving the data transmission session management NAS message and the PDU session identification sent by the sending equipment through the AMF entity.
31. The device of claim 30, wherein the processor is further configured to:
receiving, by the AMF entity, an indication identifier sent by the sending device, where the indication identifier is used to indicate that a session management NAS message is a data transmission session management NAS message;
wherein the indication identifier is received with the data transport session management, NAS, message and the PDU session identifier.
32. The apparatus of claim 29, wherein the PDU session identification is for indicating that a session management NAS message is a data transport session management NAS message.
33. The apparatus of any of claims 31 to 32, wherein the processor is further configured to:
after determining that the session management NAS message is a data transmission session management NAS message according to the PDU session identifier, reading transmission data carried in the data transmission session management NAS message; or
And after determining that the session management NAS message is a data transmission session management NAS message according to the indication mark, reading transmission data carried in the data transmission session management NAS message.
34. The device of claim 30, wherein the processor is specifically configured to:
the equipment is a terminal, and receives a data transmission session management NAS message and a PDU session identifier sent by the sending equipment through a mobility management NAS message sent by the AMF entity; or
The equipment is an SMF entity, and receives a data transmission session management NAS message and a PDU session identifier sent by the AMF entity through a calling service between the SMF entity and the AMF entity.
35. An apparatus for data transmission, the apparatus comprising:
a generating module, configured to generate a data transmission session management NAS message including transmission data, where the data transmission session management NAS message is a session management NAS message that shortens a protocol header or a session management NAS message that does not include a protocol header;
a first sending module, configured to send the NAS message for data transmission session management and the PDU session identifier to a receiving device;
wherein the generation module is further configured to: determining to adopt the data transmission session management NAS message to transmit the transmission data after determining that the triggering condition is met;
wherein, the device is a terminal, and the trigger condition includes part or all of the following:
the transmission data is small data;
the terminal needs to transmit data through a narrowband Internet of things base station; or
The device is an SMF entity, and the trigger condition comprises part or all of the following:
the transmission data is small data;
and the terminal for data transmission with the SMF entity needs to transmit data through the narrowband Internet of things base station.
36. An apparatus for data transmission, the apparatus comprising:
the first receiving module is used for receiving a data transmission session management NAS message and a PDU session identifier sent by sending equipment, wherein the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without the protocol header; the NAS message is the NAS message which is generated after the sending equipment determines that the data transmission session management NAS message is adopted to transmit the transmission data after determining that the triggering condition is met; when the sending device is a terminal, the triggering condition includes: the transmission data is small data; the terminal needs to transmit at least one of data through the narrowband Internet of things base station; when the sending device is a Session Management Function (SMF) entity, the triggering condition includes: the transmission data is small data; a terminal performing data transmission with the SMF entity needs to transmit at least one of data through a narrowband Internet of things base station;
and the second sending module is used for sending the received data transmission session management NAS message and the PDU session identification to receiving equipment.
37. An apparatus for data transmission, the apparatus comprising:
a second receiving module, configured to receive a data transmission session management NAS message and a PDU session identifier sent by a sending device, where the data transmission session management NAS message is a session management NAS message with a shortened protocol header or a session management NAS message without a protocol header; the NAS message is the NAS message which is generated after the sending equipment determines that the data transmission session management NAS message is adopted to transmit the transmission data after determining that the triggering condition is met; when the sending device is a terminal, the triggering condition includes: the transmission data is small data; the terminal needs to transmit at least one of data through the narrowband Internet of things base station; when the sending device is a Session Management Function (SMF) entity, the triggering condition includes: the transmission data is small data; a terminal performing data transmission with the SMF entity needs to transmit at least one of data through a narrowband Internet of things base station;
and the reading module is used for reading the transmission data carried in the data transmission session management NAS message and determining the PDU session corresponding to the transmission data according to the PDU session identification.
38. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7, or the steps of the method according to any one of claims 8 to 11, or the steps of the method according to any one of claims 12 to 17.
CN201811354474.0A 2018-11-14 2018-11-14 Data transmission method and equipment Active CN111194092B (en)

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