CN111479330A

CN111479330A - Data transmission method and device, sending node and receiving node

Info

Publication number: CN111479330A
Application number: CN201910068803.3A
Authority: CN
Inventors: 张大钧; 赵亚利
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2020-07-31
Also published as: WO2020151641A1

Abstract

The invention provides a data transmission method, a data transmission device, a sending node and a receiving node, wherein the data transmission method comprises the following steps: sending a data packet to a receiving node; the data packet carries time stamp information. The scheme can support the receiving node to process the data packet according to the timestamp information, so that each link participating in the DRB loading duplicate can be realized, and the use efficiency of wireless resources can be further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, so that the total QOS requirement is ensured, and the transmission efficiency is improved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the method and the device realize further optimization of transmission performance and well solve the problem of poor transmission performance of a data transmission scheme in the prior art.

Description

Data transmission method and device, sending node and receiving node

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, an apparatus, a sending node, and a receiving node.

Background

Specifically, (1) a duplication mechanism of a DRB (data bearer between a terminal and a base station) may be as shown in fig. 1, and after a duplication transmission mechanism is configured to a terminal UE through a radio resource control RRC message, the UE adds another radio link layer control protocol R L C entity and a logical channel to a current DRB bearer, and a packet data convergence protocol PDCP entity carried by the DRB repeatedly transmits on two links for a data packet that needs to be transmitted:

one link is the original R L C entity, and the other link is the newly added R L C entity.

In fig. 1, MN denotes a primary node, SN denotes a secondary node, and MAC denotes medium access control.

(2) An existing IAB network architecture can be shown in fig. 2, where a user plane downlink packet from a Donor-CU is transmitted to a Donor-DU through an F1-U interface in the Donor, and then forwarded to an IAB node1 and an IAB node2, and finally arrives at a UE. And in the data transmission process, the data packet comprises GTP-U information and adaptation layer information.

In the figure, SDAP represents a service data adaptation protocol, DU represents a centralized unit, MT represents a mobile terminal part, CU-UP represents a separation unit-user plane, GTP-U represents general packet radio service tunneling protocol-data transmission, UDP represents a user datagram protocol, IP represents an Internet protocol, Adapt represents an adaptation layer, BH-R L C channel represents a backhaul R L C logical channel, Intra-donor F1-U represents an F1-U interface in a host node, and IAB-donor represents a host node of an IAB.

However, according to the prior art, in the PDCP duplication, the buffering time of some data packets in the functional entity responsible for the wireless data transmission exceeds the time delay requirement, and then the data transmission will waste wireless resources. In addition, for the IAB network, under the condition of multi-hop, only depending on the end-to-end delay requirement, it is impossible to make each functional entity responsible for wireless transmission of data schedule data timely and accurately, thereby ensuring that the total QOS requirement is satisfied.

Therefore, for the duplicate transmission mechanism of DRB and the scheduling mechanism of IAB network, the existing transmission performance is poor, there are some problems of wasting radio resources and hard to ensure QOS requirements, and the performance index of 5G network is reduced.

Disclosure of Invention

The invention aims to provide a data transmission method, a data transmission device, a sending node and a receiving node, and solves the problem of poor transmission performance of a data transmission scheme in the prior art.

In order to solve the above technical problem, an embodiment of the present invention provides a data transmission method, applied to a sending node, including:

sending a data packet to a receiving node;

and the data packet carries time stamp information.

Optionally, the timestamp information is a time value relative to a preset start time, and a fixed time interval is taken as a unit;

the preset starting time refers to a time point corresponding to a preset reference time;

the preset reference time is a preset absolute time of the position positioning system, or is a preset reference time point of the time synchronization network.

Optionally, the timestamp information is absolute time information of a position location system, or reference time information of a time synchronization network.

Optionally, the timestamp information is contained in an application data packet; or

The timestamp information is contained in a general packet radio service tunneling protocol-data transmission GTP-U packet header of the data packet; or

The time stamp information is contained in an adaptation layer of the data packet.

Optionally, before sending the data packet to the receiving node, the method further includes:

receiving the data packet sent by another sending node; the data packet carries the timestamp information, and the timestamp information is sending time information of the other sending node for sending the data packet; or

Receiving an initial data packet sent by another sending node, and adding the timestamp information in the initial data packet to form the data packet; and the timestamp information is the sending time information of the data packet sent by the sending node.

Optionally, the sending node is an application server, a core network user plane gateway, a network entity with a packet data convergence protocol PDCP layer, a master node in a dual connectivity state, or a central unit CU in a 5G architecture.

The embodiment of the invention also provides a data transmission method, which is applied to the receiving node and comprises the following steps:

receiving a data packet sent by a sending node; wherein, the data packet carries time stamp information;

and processing the data packet according to the timestamp information.

Optionally, before receiving the data packet sent by the sending node, the method further includes:

establishing or modifying a terminal context with the sending node to obtain the service quality information of the data packet;

the processing the data packet according to the timestamp information includes:

and processing the data packet according to the timestamp information and the service quality information.

Optionally, the processing the data packet according to the timestamp information and the service quality information includes:

judging whether the data packet meets the time delay requirement or not according to the timestamp information and the service quality information;

and if not, discarding the data packet.

determining a scheduling strategy of the data packet according to the timestamp information and the service quality information;

and transmitting the data packet according to the scheduling strategy.

Optionally, the establishing or modifying a terminal context with the sending node to obtain the service quality information of the data packet includes:

establishing or modifying a terminal context with the sending node to obtain the service quality information and the routing information of the data packet;

the determining the scheduling policy of the data packet according to the timestamp information and the service quality information includes:

and determining a scheduling strategy of the data packet according to the timestamp information, the service quality information and the routing information.

Optionally, the determining a scheduling policy of the data packet according to the timestamp information, the service quality information, and the routing information includes:

determining a scheduling strategy of the data packet according to the timestamp information, the service quality information, the routing information and the preset parameter information;

the preset parameter information comprises indication information used for indicating the current transmission state of the data packet.

Optionally, the indication information includes a remaining hop count of the packet to the destination node.

determining whether the data packet is correctly sent out according to the timestamp information and the service quality information;

if not, judging whether the data transmission of the data packet exceeds the corresponding survival time;

and processing operation is carried out according to the judgment result.

Optionally, the performing, according to the determination result, a processing operation includes:

if the judgment result is yes, triggering the release of the current service bearer of the data packet, and informing the terminal;

and if the judgment result is negative, executing scheduling adjustment operation.

Optionally, before determining whether the data transmission of the data packet exceeds the corresponding lifetime, the method further includes:

and if the data packet is not correctly sent on the current service bearer for the first time, entering the survival time of data transmission of the data packet and starting scheduling adjustment operation.

and establishing or modifying a terminal context between the data packet and the sending node to obtain the service quality information of the data packet and the survival time of the data transmission of the data packet.

Optionally, the determining whether the data transmission of the data packet exceeds the corresponding lifetime includes:

judging whether the data packet is continuously and incorrectly sent within a preset time period after the data packet is not correctly sent on the current service bearer for the first time; or

And judging whether the number of times that the data packet is continuously and incorrectly sent after being incorrectly sent for the first time on the current service bearer reaches a preset threshold value.

Optionally, the data packet being incorrectly sent means that the data packet is not sent out within the time delay requirement duration in the service quality information, or the data packet is sent out within the time delay requirement duration in the service quality information, but an acknowledgement response for the data packet is not received.

The embodiment of the invention also provides a sending node, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

transmitting a data packet to a receiving node through the transceiver;

and the data packet carries time stamp information.

Optionally, the processor is further configured to:

receiving, by the transceiver, a data packet transmitted by another transmitting node before transmitting the data packet to a receiving node; the data packet carries the timestamp information, and the timestamp information is sending time information of the other sending node for sending the data packet; or

Receiving an initial data packet sent by another sending node through the transceiver, and adding the timestamp information into the initial data packet to form the data packet; and the timestamp information is the sending time information of the data packet sent by the sending node.

The embodiment of the invention also provides a receiving node, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

receiving, by the transceiver, a data packet transmitted by a transmitting node; wherein, the data packet carries time stamp information;

and processing the data packet according to the timestamp information.

Optionally, the processor is further configured to:

before receiving a data packet sent by a sending node, establishing or modifying a terminal context with the sending node to obtain service quality information of the data packet;

the processor is specifically configured to:

Optionally, the processor is specifically configured to:

and if not, discarding the data packet.

Optionally, the processor is specifically configured to:

and transmitting the data packet according to the scheduling strategy.

Optionally, the processor is specifically configured to:

the processor is specifically configured to:

Optionally, the processor is specifically configured to:

and processing operation is carried out according to the judgment result.

Optionally, the processor is specifically configured to:

Optionally, the processor is further configured to:

before judging whether the data transmission of the data packet exceeds the corresponding survival time, if the data packet is not correctly sent on the current service bearer for the first time, entering the survival time of the data transmission of the data packet, and starting to perform scheduling adjustment operation.

Optionally, the processor is specifically configured to:

An embodiment of the present invention further 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 the data transmission method on the sending node side; or

The program realizes the steps of the above-described data transmission method on the receiving node side when executed by a processor.

An embodiment of the present invention further provides a data transmission apparatus, applied to a sending node, including:

the first sending module is used for sending a data packet to a receiving node;

and the data packet carries time stamp information.

Optionally, the method further includes:

the first receiving module is used for receiving a data packet sent by another sending node before sending the data packet to a receiving node; the data packet carries the timestamp information, and the timestamp information is sending time information of the other sending node for sending the data packet; or

An embodiment of the present invention further provides a data transmission apparatus, applied to a receiving node, including:

the second receiving module is used for receiving the data packet sent by the sending node; wherein, the data packet carries time stamp information;

and the first processing module is used for processing the data packet according to the timestamp information.

Optionally, the method further includes:

the second processing module is used for establishing or modifying the terminal context with a sending node before receiving a data packet sent by the sending node to obtain the service quality information of the data packet;

the first processing module comprises:

and the first processing submodule is used for processing the data packet according to the timestamp information and the service quality information.

Optionally, the first processing sub-module includes:

the first judging unit is used for judging whether the data packet meets the time delay requirement or not according to the timestamp information and the service quality information;

and the first processing unit is used for discarding the data packet if the data packet does not meet the requirement.

Optionally, the first processing sub-module includes:

a first determining unit, configured to determine a scheduling policy of the data packet according to the timestamp information and the quality of service information;

and the second processing unit is used for transmitting the data packet according to the scheduling strategy.

Optionally, the second processing module includes:

the second processing submodule is used for establishing or modifying the terminal context with the sending node to obtain the service quality information and the routing information of the data packet;

the second processing unit includes:

and the first determining subunit is used for determining the scheduling strategy of the data packet according to the timestamp information, the service quality information and the routing information.

Optionally, the first determining subunit is specifically configured to:

Optionally, the first processing sub-module includes:

a second determining unit, configured to determine whether the data packet is correctly sent out according to the timestamp information and the quality of service information;

a second determining unit, configured to determine whether data transmission of the data packet exceeds a corresponding lifetime if the data packet is not correctly transmitted;

and the third processing unit is used for carrying out processing operation according to the judgment result.

Optionally, the third processing unit is specifically configured to:

Optionally, the method further includes:

and the third processing module is used for entering the survival time of the data transmission of the data packet and starting scheduling adjustment operation if the data packet is not correctly sent on the current service bearer for the first time before judging whether the data transmission of the data packet exceeds the corresponding survival time.

Optionally, the second processing module includes:

and the third processing submodule is used for establishing or modifying a terminal context between the third processing submodule and the sending node to obtain the service quality information of the data packet and the survival time of data transmission of the data packet.

Optionally, the second judging unit:

the first judging subunit is configured to judge whether the data packet is continuously and incorrectly sent within a preset time period after the data packet is incorrectly sent for the first time on the current service bearer; or

The technical scheme of the invention has the following beneficial effects:

in the above scheme, the data transmission method transmits a data packet to a receiving node; wherein, the data packet carries time stamp information; the receiving node can be supported to process the data packet according to the timestamp information, so that each link participating in the DRB loading duplicate can be realized, and the use efficiency of wireless resources can be further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

Drawings

FIG. 1 is a schematic diagram of DRB replication in the prior art;

FIG. 2 is a schematic diagram of an IAB network architecture in the prior art;

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

fig. 4 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;

fig. 5 is a first flowchart illustrating a specific application of the data transmission method according to the embodiment of the present invention;

fig. 6 is a schematic diagram of a specific application flow of the data transmission method according to the embodiment of the present invention;

fig. 7 is a schematic diagram of a specific application flow of the data transmission method according to the embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a specific application flow of the data transmission method according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a sending node according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating a receiving node structure according to an embodiment of the present invention;

FIG. 11 is a first schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The present invention provides a data transmission method for a sending node, aiming at the problem of poor transmission performance of a data transmission scheme in the prior art, as shown in fig. 3, the method comprises the following steps:

step 31: sending a data packet to a receiving node;

and the data packet carries time stamp information.

The data transmission method provided by the embodiment of the invention sends a data packet to a receiving node; wherein, the data packet carries time stamp information; the receiving node can be supported to process the data packet according to the timestamp information, so that each link participating in the DRB loading duplicate can be realized, and the use efficiency of wireless resources can be further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

The time stamp information is a time value relative to a preset starting time, and a fixed time interval is taken as a unit; the preset starting time refers to a time point corresponding to a preset reference time; the preset reference time is a preset absolute time of the position positioning system, or is a preset reference time point of the time synchronization network.

The timestamp information may be absolute time information of the position location system, or reference time information of the time synchronization network.

The position location system may be a global positioning system GPS or other satellite system, which is not limited herein.

Specifically, the timestamp information is contained in an application data packet; or the timestamp information is contained in a general packet radio service tunneling protocol-data transmission GTP-U packet header of the data packet; or the time stamp information is contained in an adaptation layer of the data packet.

Further, before sending the data packet to the receiving node, the method further includes: receiving the data packet sent by another sending node; the data packet carries the timestamp information, and the timestamp information is sending time information of the other sending node for sending the data packet; or receiving an initial data packet sent by another sending node, and adding the timestamp information in the initial data packet to form the data packet; and the timestamp information is the sending time information of the data packet sent by the sending node.

Specifically, the sending node is an application server, a core network user plane gateway, a network entity having a packet data convergence protocol PDCP layer, a master node in a dual connectivity state, or a central unit CU in a 5G architecture.

An embodiment of the present invention further provides a data transmission method, applied to a receiving node, as shown in fig. 4, including:

step 41: receiving a data packet sent by a sending node; wherein, the data packet carries time stamp information;

step 42: and processing the data packet according to the timestamp information.

The data transmission method provided by the embodiment of the invention receives the data packet sent by the sending node; wherein, the data packet carries time stamp information; processing the data packet according to the timestamp information; each link participating in the DRB bearing duplicate can be enabled, and the use efficiency of wireless resources is further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

Further, before receiving the data packet sent by the sending node, the method further includes: establishing or modifying a terminal context with the sending node to obtain the service quality information of the data packet; correspondingly, the processing the data packet according to the timestamp information includes: and processing the data packet according to the timestamp information and the service quality information.

The following three examples are provided in the embodiments of the present invention for processing a data packet, but not limited thereto:

a first example, said processing said data packet according to said timestamp information and said quality of service information, comprising: judging whether the data packet meets the time delay requirement or not according to the timestamp information and the service quality information; and if not, discarding the data packet.

Further, if the data packet meets the delay requirement, the transmission of the data packet is continued.

In a second example, the processing the data packet according to the timestamp information and the quality of service information includes: determining a scheduling strategy of the data packet according to the timestamp information and the service quality information; and transmitting the data packet according to the scheduling strategy.

Wherein, the establishing or modifying the terminal context between the sending node and the sending node to obtain the service quality information of the data packet includes: establishing or modifying a terminal context with the sending node to obtain the service quality information and the routing information of the data packet; correspondingly, the determining the scheduling policy of the data packet according to the timestamp information and the service quality information includes: and determining a scheduling strategy of the data packet according to the timestamp information, the service quality information and the routing information.

Specifically, the determining the scheduling policy of the data packet according to the timestamp information, the service quality information, and the routing information includes: determining a scheduling strategy of the data packet according to the timestamp information, the service quality information, the routing information and the preset parameter information; the preset parameter information comprises indication information used for indicating the current transmission state of the data packet.

Wherein, the indication information comprises the residual hop count of the data packet to the destination node.

In a third example, the processing the data packet according to the timestamp information and the quality of service information includes: determining whether the data packet is correctly sent out according to the timestamp information and the service quality information; if not, judging whether the data transmission of the data packet exceeds the corresponding survival time; and processing operation is carried out according to the judgment result.

Wherein, the processing operation according to the judgment result comprises: if the judgment result is yes, triggering the release of the current service bearer of the data packet, and informing the terminal; and if the judgment result is negative, executing scheduling adjustment operation.

Further, before determining whether the data transmission of the data packet exceeds the corresponding lifetime, the method further includes: and if the data packet is not correctly sent on the current service bearer for the first time, entering the survival time of data transmission of the data packet and starting scheduling adjustment operation.

Wherein, the establishing or modifying the terminal context between the sending node and the sending node to obtain the service quality information of the data packet includes: and establishing or modifying a terminal context between the data packet and the sending node to obtain the service quality information of the data packet and the survival time of the data transmission of the data packet.

Specifically, the determining whether the data transmission of the data packet exceeds the corresponding lifetime includes: judging whether the data packet is continuously and incorrectly sent within a preset time period after the data packet is not correctly sent on the current service bearer for the first time; or judging whether the number of times that the data packet is continuously and incorrectly sent after being incorrectly sent for the first time on the current service bearer reaches a preset threshold value.

The preset time period and the preset threshold value can be determined according to the actual requirement on the transmission performance.

More specifically, the data packet being incorrectly sent means that the data packet is not sent within the time delay requirement duration in the qos information, or the data packet is sent within the time delay requirement duration in the qos information, but an acknowledgement response for the data packet is not received.

In the embodiment of the invention, the timestamp information is a time value relative to a preset starting time, and a fixed time interval is taken as a unit; the preset starting time refers to a time point corresponding to a preset reference time; the preset reference time is a preset absolute time of the position positioning system, or is a preset reference time point of the time synchronization network.

More specifically, the sending node is an application server, a core network user plane gateway, a network entity having a packet data convergence protocol PDCP layer, a master node in a dual connectivity state, or a central unit CU in a 5G architecture.

The data transmission method provided by the embodiment of the present invention is further described below with reference to multiple sides, such as a sending node and a receiving node.

In order to further optimize transmission performance, a scheme needs to be provided for a duplicate mechanism (duplicate transmission) of a DRB (data bearer between a terminal and a base station) and a scheduling mechanism of an IAB network, so as to solve some problems of wasting radio resources and being difficult to ensure QOS requirements, thereby greatly improving the performance index of the 5G network. The embodiment of the invention provides a data transmission method, which can improve the transmission efficiency and solve the problem of multi-hop scheduling of an IAB (inter-access point) network.

The scheme provided by the embodiment of the invention mainly relates to the following steps:

and allowing a sending node such as an application server, or a UPF (user plane gateway) of a core network, or a network entity keeping the PDCP to add the timestamp information into the downlink data packet. Specifically, for example: the timestamp information is a time value corresponding to a certain start time (the preset start time), and is represented in a unit of a fixed interval (i.e. the timestamp information is embodied in a counting form), for example, the fixed interval is 1ms, or 10ms, and the start time refers to a time point corresponding to a certain reference time (the preset reference time, which may be configured by the system), and the reference time point may be a certain absolute time (the preset absolute time) of a GPS or other satellite system, or a certain reference time point (the preset reference time) of a time synchronization network. Optionally, the timestamp information is an absolute time of a GPS or other satellite system, or reference time information of a time synchronization network.

For application server, the timestamp information may be included in an application packet, such as: a dedicated synchronization frame header; for the UPF or the network entity holding the PDCP, the time stamp information may be included in the GTP-U packet header.

After receiving the timestamp information, the functional entity responsible for the wireless transmission of data can perform the following functions: firstly, judging the validity of a data packet, namely discarding the data packet if the data packet cannot meet the delay requirement, thereby saving transmission resources; secondly, a scheduling algorithm can be optimized, so that the end-to-end transmission delay of the data packet is ensured; and thirdly, judging the Survival time of the IIOT service, specifically, marking that the data packet cannot be correctly sent within the time of time delay requirements in the timestamp information and the QOS, failing to be received once, and starting to generate a timer for timing or counting. When the reception fails for N consecutive times (survivability time parameter), or the survivability time is exceeded, it is determined that the data transmission exceeds the survivability time. And adopting corresponding operations such as performance optimization, bearer management and the like aiming at different conditions.

The scheme provided by the embodiment of the invention is illustrated below.

Example 1 for information interaction between different nodes under EN-DC (dual connectivity between long term evolution L TE and new air interface NR) or MR-DC (dual connectivity between multiple radio access technologies, RATs), NR DC (dual connectivity between NRs), the sending node takes the primary node MN as an example, the other sending node takes the UPF as an example, and the receiving node takes the secondary node SN as an example.

Specifically, as shown in fig. 5, the method includes:

step 51: the main node MN configures the auxiliary node SN to perform EN-DC, MR-DC or NR DC operation through the auxiliary node SN adding or updating process, and the obtained message carries QOS information of a certain data flow or data load, such as time delay related parameters and the like.

The information about the data flow or data bearer may be determined on demand.

Step 52: after the configuration is completed, the host node MN receives a packet (containing user data) from the UPF, which contains time stamp information (specifically, the time when the UPF sent the packet).

Step 53: the master node MN forwards this time stamp information to the following functional entity responsible for the wireless transmission of data, e.g. the secondary node SN in a multi-connectivity technology such as EN-DC, MR-DC or NR-DC, via a user plane interface, e.g. X2 or Xn, etc. The timestamp information may be contained in a GTP-U header.

Step 54: the functional entity SN receiving the timestamp information may determine, in combination with the QOS information transmitted in step 51, for example, a delay-related parameter, whether the data packet can be successfully transmitted to an opposite end (UE) under a corresponding delay requirement, for example, determine a time length from the UPF to the SN of the data packet. If the requirements cannot be met, the packet is discarded, thereby saving transmission resources (i.e., performing validation operations).

Wherein: for the case that the data packet in step 52 does not include the timestamp information, the network entity MN (in this example, the MN in step 52) that maintains the PDCP at the RAN side of the radio access network adds a piece of timestamp information (specifically, the time when the MN sends the data packet in step 52 may be embodied in the form of a number, and the time difference between sending and receiving of the data packet corresponding to the number is known) to the data packet to be transmitted, and then forwards the data packet to the following functional entity SN responsible for wireless data transmission. This information may be contained in the GTP-U header, or in the adaptation layer of the data packet. The subsequent processing is the same as steps 53 to 54.

Example 2: for information interaction between network nodes under the architecture of separation of CU and DU, the sending node takes CU as an example, the other sending node takes UPF as an example, and the receiving node takes DU as an example.

Specifically, as shown in fig. 6, the method includes:

step 61: and the CU entity configures the DU entity through the process of establishing or modifying the UE context, wherein the message carries the QOS information of a certain data flow or data bearer, such as time delay related parameters and the like.

The information about the data flow or data bearer may be determined on demand.

Step 62: after the configuration is completed, the CU entity receives a packet (containing user data) from the UPF, which contains time stamp information (specifically, the time when the UPF sent the packet).

And step 63: the CU entity forwards this time stamp information to the following functional entity DU responsible for the wireless transmission of data via a user plane interface, e.g. the F1 interface. The time stamp information is contained in the GTP-U header.

Step 64: the functional entity DU receiving the timestamp information may determine, by combining the QOS information transmitted in step 61, for example, the delay related parameter, whether the data packet can be successfully transmitted to the opposite end (UE) under the corresponding delay requirement, for example, determine the time length from the UPF to the DU. If the requirements cannot be met, the packet is discarded, thereby saving transmission resources (i.e., performing validation operations).

Wherein: for the case that the data packet in step 62 does not contain the timestamp information, the network entity CU (in this example, the CU in step 62) that keeps the PDCP at the RAN side of the radio access network adds a piece of timestamp information (specifically, the time when the CU in step 62 sends the data packet may be embodied in a number form, and the time difference between sending and receiving of the data packet corresponding to the number is known) to the data packet to be transmitted, and then forwards the data packet to the following functional entity DU in charge of data wireless transmission. This information may be contained in the GTP-U header, or in the adaptation layer of the data packet. The subsequent processing is the same as steps 63 to 64.

Example 3: for information interaction between nodes under an IAB network architecture, the sending node takes Donor-CU as an example, the other sending node takes UPF as an example, and the receiving node takes Donor-DU as an example.

Specifically, as shown in fig. 7, the method includes:

step 71-73: a Donor-CU entity, which configures each level of DU (at least one DU, a plurality of DUs can be connected in series) entities of the IAB network through the UE context establishing or modifying process, wherein the information carries QOS information of a certain data flow or data bearer, such as time delay related parameters; optionally, routing related information is included.

The information about the data flow or data bearer may be determined on demand.

Step 74: after the configuration is completed, the Donor-CU entity receives a data packet (containing user data) from the UPF, wherein the data packet contains time stamp information;

step 75: the Donor-CU entity forwards this time stamp information to the following functional entity responsible for the wireless transmission of data, e.g. the Donor-DU, via a user plane interface, e.g. the F1 interface. The time stamp information is contained in the GTP-U header.

Step 76: the functional entity that receives the timestamp information, such as: the Donor-DU may determine the scheduling policy 1 of the data packet in combination with the QOS information transmitted in step 71 and the routing related information, for example, in combination with the delay related parameters therein and other parameters (for example, the number of remaining hops to the target IAB node), and ensure that the delay of the data packet after passing through the multi-hop IAB node to reach the UE satisfies the end-to-end QOS requirement.

Such as: determining the length of a residual path according to the route related information, determining the number of residual nodes needing to pass according to the residual hop number, and determining the transmission priority (such as more residual and high priority) according to the length of the residual path and the number of the residual nodes;

determining quality requirements according to the QOS information, and determining transmission paths (such as paths with high stability and high transmission speed) with corresponding quality according to the quality requirements;

and obtaining the scheduling strategy of the data packet according to the transmission priority and the determined transmission path.

Step 77-710: similar to the above steps 75-76 (only the main body conversion is performed), the scheduling policies 2 and 3 of the data packet are respectively performed, so that the time delay of the data packet after passing through the multi-hop IAB node and reaching the UE meets the end-to-end QOS requirement. Wherein the timestamp information may be included in the GTP-U header, or in the adaptation layer of the data packet.

Step 711: the last hop IAB node (IAB node) sends user data to the UE. The last hop IAB node in this example is IAB-node2 in fig. 7.

Wherein: for the case that the data packet in step 74 does not contain the timestamp information, the network entity Donor-CU (in this example, the CU in step 74) that keeps the PDCP at the RAN side of the radio access network adds a piece of timestamp information (specifically, the time when the CU sends the data packet in step 74 may be embodied in a numbering form, and the time difference between sending and receiving of the data packet corresponding to the numbering is known) to the data packet to be transmitted, and then forwards the data packet to each level of DU function entities responsible for data wireless transmission below. This information may be contained in the GTP-U header, or adaptation layer of the data packet. The subsequent processing is the same as steps 75 to 711.

Example 4: for how to guarantee the survivability time under the structure of separating CU and DU, the sending node takes CU as an example, the other sending node takes UPF as an example, and the receiving node takes DU as an example.

Specifically, as shown in fig. 8, the method includes:

step 81: the CU entity configures the DU entity through the UE context establishment or modification process, where the message carries QOS information of a certain data stream or data bearer, such as a delay related parameter and a survivability time parameter.

The information about the data flow or data bearer may be determined on demand.

Step 82: after the configuration is completed, the CU entity receives a packet (containing user data) from the UPF, which contains time stamp information (specifically, the time when the UPF sent the packet).

Step 83: the CU entity forwards this time stamp information to the following functional entity DU responsible for the wireless transmission of data via a user plane interface, e.g. the F1 interface. The time stamp information is contained in the GTP-U header.

Step 84: the functional entity DU receiving the timestamp information may determine, by combining the QOS information transmitted in step 81, for example, the delay related parameter, whether the data transmission enters the survivability time or exceeds the survivability time (i.e., performing the time-to-live determination); specifically, the packet cannot be correctly sent out (not sent out, or sending out without receiving an acknowledgement response) within the time of the time delay requirement in the timestamp information and QOS, and is marked as a failed reception (described from the opposite end), and the Survival timer timing or counting is started. When the reception fails for N consecutive times (survivability time parameter), or the survivability time is exceeded, it is determined that the data transmission exceeds the survivability time. If the former (entering into survivval time), the operation of scheduling or performance optimization is started, for example: operations such as suspending the suspend service bearer (i.e. suspending data transmission, but still existing configuration) and then resuming or reestablishing the service bearer are allowed; and if the latter (exceeding the survivval time), directly triggering the operation of releasing the service bearer and the like, and signaling the UE.

Wherein: for the case that the data packet in step 82 does not contain timestamp information, the network entity CU (in this example, the CU in step 82) that keeps the PDCP at the RAN side of the radio access network adds one piece of timestamp information (specifically, the time when the CU in step 82 sends the data packet may be embodied in a number form, and the time difference between sending and receiving of the data packet corresponding to the number is known) to the data packet to be transmitted, and then forwards the data packet to the following functional entity DU in charge of data wireless transmission. This information is contained in the GTP-U header. The subsequent processing is the same as steps 83 to 84.

As can be seen from the above, the solution provided by the embodiment of the present invention mainly relates to the following points:

1) allowing the application server, or UPF (user plane gateway of core network), or network entity holding PDCP to add time stamp information to the downlink data packet.

2) Based on 1) the time stamp information is a time value relative to a certain starting time, and the starting time is a time point corresponding to a certain reference time, such as 1ms, or 10ms, and the reference time may be an absolute time of a GPS or other satellite system, or a certain reference time of a time synchronization network.

3) Optionally, the time stamp information is based on 1) the absolute time of the GPS or other satellite system, or the reference time information of the time synchronization network.

4) Based on 2) or 3), for the application server, the timestamp information may be included in the application packet, for example: a dedicated synchronization frame header.

5) Based on 2) or 3), the time stamp information may be included in the GTP-U header for the UPF or the network entity holding the PDCP.

6) Based on 4) or 5), after receiving the timestamp information, the functional entity responsible for wireless data transmission performs a packet validity determination operation, that is, if the packet cannot meet the delay requirement, the packet is discarded, thereby saving transmission resources.

7) Based on 4) or 5), in the IAB network, after the functional entity responsible for wireless data transmission receives the timestamp information, the scheduling algorithm is optimized, so as to ensure that the end-to-end transmission delay of the data packet is guaranteed.

8) Based on 4) or 5), for the IIOT service, after receiving the timestamp information, the functional entity responsible for wireless data transmission will perform Survival time determination, specifically, within the time required by the timestamp information and the delay in QOS, the data packet cannot be correctly sent out, and is marked as a failed reception, and the Survival timer is started to time or count. When the reception fails for N consecutive times (survivability time parameter), or the survivability time is exceeded, it is determined that the data transmission exceeds the survivability time. And adopting corresponding operations such as performance optimization, bearer management and the like aiming at different conditions.

In summary, the solution provided in the embodiment of the present invention enables each link participating in the DRB bearer duplicate to further improve the utilization efficiency of the radio resource; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless transmission of data can schedule data timely and accurately, and the total QOS requirement is ensured; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index.

transmitting a data packet to a receiving node through the transceiver;

and the data packet carries time stamp information.

The sending node provided by the embodiment of the invention sends a data packet to a receiving node through the transceiver; wherein, the data packet carries time stamp information; the receiving node can be supported to process the data packet according to the timestamp information, so that each link participating in the DRB loading duplicate can be realized, and the use efficiency of wireless resources can be further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

Specifically, as shown in fig. 9, the sending node according to the embodiment of the present invention includes:

a processor 91; and a memory 93 connected to the processor 91 through a bus interface 92, wherein the memory 93 is used for storing programs and data used by the processor 91 in executing operations, and when the processor 91 calls and executes the programs and data stored in the memory 93, the following processes are performed:

sending data packets to a receiving node via the transceiver 94;

and the data packet carries time stamp information.

Among other things, a transceiver 94 is connected to the bus interface 92 for receiving and transmitting data under the control of the processor 91.

It should be noted that in fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 91 and various circuits of memory represented by memory 93 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 transceiver 94 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 91 is responsible for managing the bus architecture and general processing, and the memory 93 may store data used by the processor 91 in performing operations.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Further, the processor is further configured to: receiving, by the transceiver, a data packet transmitted by another transmitting node before transmitting the data packet to a receiving node; the data packet carries the timestamp information, and the timestamp information is sending time information of the other sending node for sending the data packet; or receiving an initial data packet sent by another sending node through the transceiver, and adding the timestamp information in the initial data packet to form the data packet; and the timestamp information is the sending time information of the data packet sent by the sending node.

The implementation embodiments of the data transmission method on the sending node side are all applicable to the embodiment of the sending node, and the same technical effects can be achieved correspondingly.

and processing the data packet according to the timestamp information.

The receiving node provided by the embodiment of the invention receives the data packet sent by the sending node through the transceiver; wherein, the data packet carries time stamp information; processing the data packet according to the timestamp information; each link participating in the DRB bearing duplicate can be enabled, and the use efficiency of wireless resources is further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

Specifically, as shown in fig. 10, the receiving node according to the embodiment of the present invention includes:

a processor 101; and a memory 103 connected to the processor 101 through a bus interface 102, wherein the memory 103 is used for storing programs and data used by the processor 101 in executing operations, and when the processor 101 calls and executes the programs and data stored in the memory 103, the following processes are executed:

receiving, by the transceiver 104, a data packet sent by a sending node; wherein, the data packet carries time stamp information;

and processing the data packet according to the timestamp information.

Among other things, the transceiver 104 is connected to the bus interface 102 for receiving and transmitting data under the control of the processor 101.

It should be noted that in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 101 and various circuits of memory represented by memory 103 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 transceiver 104 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 may store data used by the processor 101 in performing operations.

Further, the processor is further configured to: before receiving a data packet sent by a sending node, establishing or modifying a terminal context with the sending node to obtain service quality information of the data packet; correspondingly, the processor is specifically configured to: and processing the data packet according to the timestamp information and the service quality information.

in a first example, the processor is specifically configured to: judging whether the data packet meets the time delay requirement or not according to the timestamp information and the service quality information; and if not, discarding the data packet.

In a second example, the processor is specifically configured to: determining a scheduling strategy of the data packet according to the timestamp information and the service quality information; and transmitting the data packet according to the scheduling strategy.

Wherein the processor is specifically configured to: establishing or modifying a terminal context with the sending node to obtain the service quality information and the routing information of the data packet; correspondingly, the processor is specifically configured to: and determining a scheduling strategy of the data packet according to the timestamp information, the service quality information and the routing information.

Specifically, the processor is specifically configured to: determining a scheduling strategy of the data packet according to the timestamp information, the service quality information, the routing information and the preset parameter information; the preset parameter information comprises indication information used for indicating the current transmission state of the data packet.

In a third example, the processor is specifically configured to: determining whether the data packet is correctly sent out according to the timestamp information and the service quality information; if not, judging whether the data transmission of the data packet exceeds the corresponding survival time; and processing operation is carried out according to the judgment result.

Wherein the processor is specifically configured to: if the judgment result is yes, triggering the release of the current service bearer of the data packet, and informing the terminal; and if the judgment result is negative, executing scheduling adjustment operation.

Further, the processor is further configured to: before judging whether the data transmission of the data packet exceeds the corresponding survival time, if the data packet is not correctly sent on the current service bearer for the first time, entering the survival time of the data transmission of the data packet, and starting to perform scheduling adjustment operation.

Wherein the processor is specifically configured to: and establishing or modifying a terminal context between the data packet and the sending node to obtain the service quality information of the data packet and the survival time of the data transmission of the data packet.

Specifically, the processor is specifically configured to: judging whether the data packet is continuously and incorrectly sent within a preset time period after the data packet is not correctly sent on the current service bearer for the first time; or judging whether the number of times that the data packet is continuously and incorrectly sent after being incorrectly sent for the first time on the current service bearer reaches a preset threshold value.

The implementation embodiments of the data transmission method on the receiving node side are all applicable to the embodiment of the receiving node, and the same technical effects can be achieved.

The implementation embodiments of the data transmission method at the sending node side or the receiving node side are all applicable to the embodiment of the computer-readable storage medium, and the same technical effects can be achieved.

An embodiment of the present invention further provides a data transmission apparatus, applied to a sending node, as shown in fig. 11, including:

a first sending module 111, configured to send a data packet to a receiving node;

and the data packet carries time stamp information.

The data transmission device provided by the embodiment of the invention sends a data packet to a receiving node; wherein, the data packet carries time stamp information; the receiving node can be supported to process the data packet according to the timestamp information, so that each link participating in the DRB loading duplicate can be realized, and the use efficiency of wireless resources can be further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

Further, the data transmission apparatus further includes: the first receiving module is used for receiving a data packet sent by another sending node before sending the data packet to a receiving node; the data packet carries the timestamp information, and the timestamp information is sending time information of the other sending node for sending the data packet; or receiving an initial data packet sent by another sending node, and adding the timestamp information in the initial data packet to form the data packet; and the timestamp information is the sending time information of the data packet sent by the sending node.

The implementation embodiments of the data transmission method on the sending node side are all applicable to the embodiment of the data transmission device, and the same technical effects can be achieved.

An embodiment of the present invention further provides a data transmission apparatus, applied to a receiving node, as shown in fig. 12, including:

a second receiving module 121, configured to receive a data packet sent by a sending node; wherein, the data packet carries time stamp information;

a first processing module 122, configured to process the data packet according to the timestamp information.

The data transmission device provided by the embodiment of the invention receives the data packet sent by the sending node; wherein, the data packet carries time stamp information; processing the data packet according to the timestamp information; each link participating in the DRB bearing duplicate can be enabled, and the use efficiency of wireless resources is further improved; aiming at the IAB network, under the condition of multi-hop, each functional entity responsible for wireless data transmission can schedule data timely and accurately, the total QOS requirement is ensured, the transmission efficiency is improved, and the problem of multi-hop scheduling of the IAB network is solved; in addition, for the IIOT service, the functional entity responsible for the wireless data transmission further ensures the survivability time performance index; the transmission performance is further optimized, and the problems of radio resource waste and difficulty in ensuring the QOS requirement can be solved aiming at the duplicate mechanism of the DRB and the scheduling mechanism of the IAB network, so that the performance index of the 5G network is greatly improved; the problem of poor transmission performance of a data transmission scheme in the prior art is well solved.

Further, the data transmission apparatus further includes: the second processing module is used for establishing or modifying the terminal context with a sending node before receiving a data packet sent by the sending node to obtain the service quality information of the data packet; correspondingly, the first processing module includes: and the first processing submodule is used for processing the data packet according to the timestamp information and the service quality information.

in a first example, the first processing sub-module includes: the first judging unit is used for judging whether the data packet meets the time delay requirement or not according to the timestamp information and the service quality information; and the first processing unit is used for discarding the data packet if the data packet does not meet the requirement.

In a second example, the first processing sub-module includes: a first determining unit, configured to determine a scheduling policy of the data packet according to the timestamp information and the quality of service information; and the second processing unit is used for transmitting the data packet according to the scheduling strategy.

Wherein the second processing module comprises: the second processing submodule is used for establishing or modifying the terminal context with the sending node to obtain the service quality information and the routing information of the data packet; correspondingly, the second processing unit includes: and the first determining subunit is used for determining the scheduling strategy of the data packet according to the timestamp information, the service quality information and the routing information.

Specifically, the first determining subunit is specifically configured to: determining a scheduling strategy of the data packet according to the timestamp information, the service quality information, the routing information and the preset parameter information; the preset parameter information comprises indication information used for indicating the current transmission state of the data packet.

In a third example, the first processing sub-module includes: a second determining unit, configured to determine whether the data packet is correctly sent out according to the timestamp information and the quality of service information; a second determining unit, configured to determine whether data transmission of the data packet exceeds a corresponding lifetime if the data packet is not correctly transmitted; and the third processing unit is used for carrying out processing operation according to the judgment result.

Wherein the third processing unit is specifically configured to: if the judgment result is yes, triggering the release of the current service bearer of the data packet, and informing the terminal; and if the judgment result is negative, executing scheduling adjustment operation.

Further, the data transmission apparatus further includes: and the third processing module is used for entering the survival time of the data transmission of the data packet and starting scheduling adjustment operation if the data packet is not correctly sent on the current service bearer for the first time before judging whether the data transmission of the data packet exceeds the corresponding survival time.

Wherein the second processing module comprises: and the third processing submodule is used for establishing or modifying a terminal context between the third processing submodule and the sending node to obtain the service quality information of the data packet and the survival time of data transmission of the data packet.

Specifically, the second determination unit: the first judging subunit is configured to judge whether the data packet is continuously and incorrectly sent within a preset time period after the data packet is incorrectly sent for the first time on the current service bearer; or judging whether the number of times that the data packet is continuously and incorrectly sent after being incorrectly sent for the first time on the current service bearer reaches a preset threshold value.

The implementation embodiments of the data transmission method on the receiving node side are all applicable to the embodiment of the data transmission device, and the same technical effect can be achieved.

It should be noted that many of the functional components described in this specification are referred to as modules/sub-modules/units/sub-units in order to more particularly emphasize their implementation independence.

In embodiments of the present invention, the modules/sub-modules/units/sub-units may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module that can be implemented by software can build corresponding hardware circuits including conventional very large scale integration (V L SI) circuits or gate arrays and existing semiconductors such as logic chips, transistors, or other discrete components to implement corresponding functions, without considering the cost.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A data transmission method applied to a sending node, comprising:

sending a data packet to a receiving node;

and the data packet carries time stamp information.

2. The data transmission method according to claim 1, wherein the time stamp information is a time value with respect to a preset start time in units of a fixed time interval;

3. The data transmission method according to claim 1, wherein the timestamp information is absolute time information of a position location system or reference time information of a time synchronization network.

4. The data transmission method according to claim 1, wherein the time stamp information is contained in an application packet; or

5. The data transmission method according to claim 1, further comprising, before transmitting the data packet to the receiving node:

6. The data transmission method according to claim 1, wherein the sending node is an application server, a core network user plane gateway, a network entity with a packet data convergence protocol PDCP layer, a master node in dual connectivity state, or a central unit CU in a 5G architecture.

7. A data transmission method applied to a receiving node, comprising:

and processing the data packet according to the timestamp information.

8. The data transmission method according to claim 7, further comprising, before receiving the data packet sent by the sending node:

the processing the data packet according to the timestamp information includes:

9. The data transmission method according to claim 8, wherein the processing the data packet according to the timestamp information and the quality of service information comprises:

and if not, discarding the data packet.

10. The data transmission method according to claim 8, wherein the processing the data packet according to the timestamp information and the quality of service information comprises:

and transmitting the data packet according to the scheduling strategy.

11. The data transmission method according to claim 10, wherein the establishing or modifying the terminal context with the sending node to obtain the qos information of the data packet comprises:

12. The data transmission method according to claim 11, wherein the determining the scheduling policy of the data packet according to the timestamp information, the quality of service information, and the routing information comprises:

13. The data transmission method according to claim 12, wherein the indication information includes a remaining number of hops for the data packet to reach a destination node.

14. The data transmission method according to claim 8, wherein the processing the data packet according to the timestamp information and the quality of service information comprises:

and processing operation is carried out according to the judgment result.

15. The data transmission method according to claim 14, wherein the performing the processing operation according to the determination result includes:

16. The data transmission method according to claim 14, further comprising, before determining whether the data transmission of the data packet exceeds the corresponding time-to-live:

17. The data transmission method according to claim 14, wherein the establishing or modifying the terminal context with the sending node to obtain the qos information of the data packet comprises:

18. The data transmission method according to claim 14, wherein the determining whether the data transmission of the data packet exceeds the corresponding time-to-live includes:

19. The data transmission method according to any one of claims 14 to 18, wherein the data packet is not correctly sent out means that the data packet is not sent out within the delay requirement duration in the qos information, or the data packet is sent out within the delay requirement duration in the qos information, but an acknowledgement response for the data packet is not received.

20. The data transmission method according to claim 7, wherein the time stamp information is a time value with respect to a preset start time in units of a fixed time interval;

21. The data transmission method according to claim 7, wherein the timestamp information is absolute time information of a position location system or reference time information of a time synchronization network.

22. The data transmission method according to claim 7, wherein the time stamp information is contained in an application packet; or

23. The data transmission method according to claim 7, wherein the sending node is an application server, a core network user plane gateway, a network entity with a packet data convergence protocol PDCP layer, a master node in dual connectivity state, or a central unit CU in a 5G architecture.

24. A transmitting node comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

transmitting a data packet to a receiving node through the transceiver;

and the data packet carries time stamp information.

25. The transmitting node according to claim 24, wherein the time stamp information is a time value relative to a preset start time, in units of a fixed time interval;

26. The sending node according to claim 24, wherein the timestamp information is absolute time information of a position location system or reference time information of a time synchronization network.

27. The sending node of claim 24, wherein the time stamp information is contained in an application packet; or

28. The transmitting node of claim 24, wherein the processor is further configured to:

29. The transmitting node according to claim 24, wherein the transmitting node is an application server, a core network user plane gateway, a network entity with a packet data convergence protocol PDCP layer, a master node in dual connectivity state or a central unit, CU, in a 5G architecture.

30. A receiving node comprising a memory, a processor, a transceiver and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

and processing the data packet according to the timestamp information.

31. The receiving node of claim 30, wherein the processor is further configured to:

the processor is specifically configured to:

32. The receiving node of claim 31, wherein the processor is further configured to:

and if not, discarding the data packet.

33. The receiving node of claim 31, wherein the processor is further configured to:

and transmitting the data packet according to the scheduling strategy.

34. The receiving node of claim 33, wherein the processor is further configured to:

the processor is specifically configured to:

35. The receiving node of claim 34, wherein the processor is further configured to:

36. The receiving node of claim 35, wherein the indication information comprises a number of remaining hops until the packet reaches a destination node.

37. The receiving node of claim 31, wherein the processor is further configured to:

and processing operation is carried out according to the judgment result.

38. The receiving node of claim 37, wherein the processor is further configured to:

39. The receiving node of claim 37, wherein the processor is further configured to:

40. The receiving node of claim 37, wherein the processor is further configured to:

41. The receiving node of claim 37, wherein the processor is further configured to:

42. The receiving node according to any of claims 37 to 41, wherein the data packet not being correctly sent out means that the data packet was not sent out within the delay requirement duration in the QoS information, or that the data packet was sent out within the delay requirement duration in the QoS information but an acknowledgement response was not received for the data packet.

43. The receiving node according to claim 30, wherein the time stamp information is a time value relative to a preset start time, in units of fixed time intervals;

44. The receiving node according to claim 30, wherein the timestamp information is absolute time information of a position location system or reference time information of a time synchronization network.

45. The receiving node of claim 30, wherein the time stamp information is contained in an application packet; or

46. The receiving node according to claim 30, wherein the sending node is an application server, a core network user plane gateway, a network entity with a packet data convergence protocol PDCP layer, a master node in dual connectivity state or a central unit, CU, in a 5G architecture.

47. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the data transmission method according to any one of claims 1 to 6; or

The program implementing the steps of the data transmission method according to any one of claims 7 to 23 when executed by a processor.

48. A data transmission apparatus applied to a transmitting node, comprising:

the first sending module is used for sending a data packet to a receiving node;

and the data packet carries time stamp information.

49. A data transmission apparatus for use at a receiving node, comprising: