CN110366258B

CN110366258B - Data transmission method, related equipment and communication system

Info

Publication number: CN110366258B
Application number: CN201810313341.2A
Authority: CN
Inventors: 蔺波; 于峰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-04-09
Filing date: 2018-04-09
Publication date: 2021-08-31
Anticipated expiration: 2038-04-09
Also published as: CN110366258A; WO2019196810A1

Abstract

The embodiment of the application discloses a data transmission method, related equipment and a system. The method comprises the following steps: the first network equipment acquires first time information; receiving service data and second time information from the first communication device; and processing the transmission of the service data according to the first time information and the second time information. The embodiment of the application also provides network equipment, communication equipment, a terminal and a communication system, which are used for improving the certainty of the data transmission time delay between sending end equipment and receiving end equipment and reducing the influence of wireless transmission on the control technology.

Description

Data transmission method, related equipment and communication system

Technical Field

The present application relates to the field of communications, and in particular, to a data transmission method, a related device, and a communication system.

Background

At present, a control technique is known in which, after receiving an operation instruction sent by a sending-end device, a receiving-end device executes an action indicated by the operation instruction. In this technique, in order to ensure accurate control of the action performed by the receiving end, the transmitting end device learns the transmission delay of the operation command between the transmitting end device and the receiving end device, so as to design the operation command while considering the transmission delay, so that the receiving end device can perform the action indicated by the operation command at an expected time. When the sending end device and the receiving end device adopt a wired communication mode, the transmission delay is fixed, so that the sending end device can accurately estimate the action execution time of the receiving end device based on the fixed transmission delay.

However, in the wired communication method, cables need to be arranged between the sending end device and the receiving end device, and the cables are affected by terrain, ring shape and the like of a production field, which may cause great wiring difficulty, and seriously affect flexibility and cost of device layout. For example, industrial robots are increasingly used in production lines in industrial automation. In a conventional industrial network, an industrial robot is generally controlled by adopting a wired deployment manner, the cable deployment and maintenance cost is high by adopting the wired deployment manner, and the mobility of the robot is poor due to the limitation of cables.

In this regard, it may be considered to adopt a wireless transmission method instead of a wired transmission method, but in wireless transmission, due to channel instability, it is difficult to fix the transmission delay between the sending end device and the receiving end device, so that the transmission delays of the receiving end device and the sending end device have uncertainty. How to reduce the influence of uncertainty of transmission delay on the application of a wireless transmission mode to a control technology becomes a problem to be solved urgently.

Disclosure of Invention

The embodiment of the application provides a data transmission method, related equipment and a communication system, which are used for reducing the influence of wireless transmission on a control technology. The method is applied to a data transmission system, which comprises a first communication device, a first network device and a second communication device, wherein the first communication device can be a core network device, the second communication device can be a terminal, or the first communication device is a terminal, and the second communication device is a core network device; the terminal is connected with the network equipment through a wireless network.

In a first aspect, an embodiment of the present application provides a data transmission method, including:

the first network device receives first time information, the first time information is related to the type of a service and can be used for determining a variation range of a delay, the first network device receives service data and second time information from first communication equipment, the second time information is used for indicating time information corresponding to the first service data, and the second time information can be a moment corresponding to the first service data, a plurality of moments, a time range or transmission duration corresponding to the service data; in this embodiment, the first network device, as an intermediate node, may participate in transmission of two parts, namely, a wired network and a wireless network (taking wired transmission between the network device and a core network device as an example), and the first network device may determine to process the service data according to the first time information and the second time information, and implement mutual compensation of two periods of time delay of wired transmission and wireless transmission, so as to improve certainty of time delay of data transmission from the first communication device to the second communication device.

In one possible implementation, the first network device may receive a data packet from the first communication device, the data packet including the service data and the second time information; or, the first network device may also receive the first service data first and then receive the second time information; or, the second time information may be received first, and then the first service data may be received.

In a possible implementation manner, the first time information is jitter information, the second time information is a timestamp, and the timestamp includes a delivery time of the first service data at the second communication device, or the timestamp includes a receiving time of the first service data at the second communication device or a sending time of the first service data at the first communication device; the method comprises the steps that the submission time comprises reference submission time or suggested submission time, wherein the suggested submission time or the reference submission time is the time for the suggested submission time to suggest data submission to the second communication device or the time for the second communication device to refer to when the data submission is carried out; the reference delivery time or the suggested delivery time may be a time instant or a time range; if the reference delivery time or the suggested delivery time is a time, the time may be the reference delivery time or the suggested delivery time, or the earliest delivery time or the latest delivery time; the second communication device may determine a delivery time window, that is, a delivery time range in which the second communication device delivers the service data, according to the reference delivery time or the suggested delivery time and the second time information.

In one possible implementation, the first network device receives the first time information through the control plane and receives the second time information through the user plane.

In a possible implementation manner, when receiving the first time information, an identifier corresponding to the first service data is further received, where the identifier is used to identify a service, and the service data is data corresponding to the service; the first network device may determine that the first time information corresponds to the service data according to the identifier.

In a possible implementation manner, the first communication device is a core network device, or the second communication device is a core network device, and the first network device may receive a Quality of Service (Qos) parameter sent by the core network device through a control plane, where the Qos includes first time information; or the first network equipment receives the first time information forwarded by the second network equipment.

In a possible implementation manner, processing transmission of service data according to the first time information and the second time information may specifically be: determining a scheduling priority according to the first time information and the second time information; and transmitting the service data according to the scheduling priority, such as performing accelerated transmission, normal transmission or delayed transmission on the first service data.

In a possible implementation manner, the first network device records a transmission state of the service data, where the transmission state includes transmission success, transmission failure, loss, timeout, and the like; the first network device may be favorable to improve reliability of the next data packet by recording the transmission state of the second service data.

In a possible implementation manner, the specific method for processing transmission of service data according to the first time information and the second time information by the first node may further include: the first network device may determine that the service data is overtime according to the first time information and the second time information, and abandon transmission of the service data; discarding the transmission of the service data, which may be understood as discarding (discard) the service data, and may also be referred to as skipping (skip) the delivery or transmission of the service data; in the embodiment of the present application, if the first network device has determined that the service data is overtime, if the first network device continues to transmit the service data, when the service data still times out when reaching the second communication device, transmission overhead is also increased, and therefore, the first network device abandons transmission of the service data, so as to save overhead.

In a possible implementation manner, the service corresponding to the service data is a periodic service, and the first network device may obtain a transmission period corresponding to the service data through the control plane; transmitting the subsequent service data of the service to the second communication equipment according to the transmission period; in this example, the first communication device (e.g., the core network device) does not need to stamp a time stamp in each data packet of the first service data, and may stamp a time stamp in the data packet when the first data packet including the first service data is sent, and a time stamp corresponding to a subsequent data packet may be calculated according to the time stamp and the transmission cycle of the first data packet, and the subsequent data packet does not need to include a time stamp, so as to save overhead.

In a possible implementation manner, the first communication device or the second communication device is a core network device, in a protocol architecture in which the first network device communicates with the core network device, the second time information is carried in a data packet of a first protocol layer, the first protocol layer is a medium access control MAC layer, a synchronization layer, or a general packet radio service tunnel GTP-U layer of a user plane, and the data packet of the first protocol layer includes service data.

In a possible implementation manner, the first communication device or the second communication device is a terminal, in a protocol architecture in which the first network device communicates with the terminal, the second time information is carried in a data packet of a second protocol layer, the second protocol layer is an MAC layer, a synchronization layer, a service data adaptation protocol SDAP layer, a packet data convergence protocol PDCP layer, or a radio link layer control protocol RLC layer, and the data packet of the second protocol layer includes service data. The terminal submits the service data to an upper layer until the service data is submitted to an application layer, and carries second time information to a protocol layer, wherein the closer the protocol layer is to the application layer, the shorter the interlayer processing time for processing the service data is, the more accurate the time control is, for example, if the second time information is carried to an MAC layer, the time of submitting the service data to the upper layer, which is the time of submitting the service data to the application layer, is the shortest the interlayer processing time, and the more accurate the time control is. Optionally, if the second time information is carried in the SYNC layer, the SYNC layer is a protocol layer newly added for controlling time, the SYNC layer is used for processing time control, and does not perform other function processing on service data, so that the second time information is carried in the SYNC layer, and the terminal reads the second time information from the SYNC layer, thereby reducing the data processing time; optionally, the PDCP layer has a function of providing an ordered delivery to an upper layer, and if the second time information is carried in the PDCP layer, the PDCP layer may perform an on-demand delivery according to a time indicated by the second time information.

In a possible implementation manner, the first network device determines an arrival state of the service data according to the current time, the first time information, and the second time information, where the arrival state includes early arrival, normal arrival, or late arrival, and the first network device may determine the scheduling priority according to the arrival state.

In a second aspect, an embodiment of the present application provides a method for data transmission, including: the communication device receives first time information, the first time information and the second time information are used for determining a delivery time window of service data corresponding to a service in the communication device, the delivery time window is used for representing a time range, and the first communication device can be a core network device or a terminal device; the communication equipment determines a delivery time window according to the first time information and the second time information; the communication equipment processes the submission of the service data in a submission time window; in the embodiment of the application, the communication device may determine a time range for submitting the service data according to the first time information and the second time information, and process the submission of the service data according to the time range, so that the received service data is submitted in the determined time range, and the certainty of the time delay is improved.

In one possible implementation, the communication device receives first time information from the network device through a control plane; the communication device receives a data packet from the network device through the user plane, wherein the data packet comprises service data and second time information.

In a possible implementation manner, when receiving the first time information, the communication device further receives an identifier corresponding to the service data through the control plane.

In one possible implementation manner, the identifier includes a flow identifier, a logical channel identifier, or a radio bearer identifier, where the flow identifier, the logical channel identifier, and the radio bearer identifier have a corresponding relationship, and the communication device may identify the service data through the identifier.

In a possible implementation manner, the first time information is jitter information, the second time information is a timestamp, and the timestamp includes a delivery time of the service data at the communication device, or the timestamp includes a receiving time or a sending time of the service data at the opposite-end communication device; the delivery time may include a reference delivery time or a suggested delivery time, the reference delivery time or the suggested delivery time being a time suggested for the second communication device to deliver the data, or a time referenced for the second communication device to deliver the data; the reference delivery time or the suggested delivery time may be a time (e.g., the time may be the reference delivery time or the suggested delivery time, or the earliest delivery time or the latest delivery time), or may be a time range; the second communication device may determine a delivery time window according to the reference delivery time or the suggested delivery time, and the second time information; in the embodiment of the application, a time range for submitting the service data can be determined according to the first time information and the second time information, and the service data is submitted in the time range, so that the certainty of the time delay is improved.

In a possible implementation manner, the processing, by the communication device, the delivery of the service data according to the delivery time window may specifically be: and the communication equipment delivers the service data to the target node or the target protocol layer in the delivery time window.

In one possible implementation, when the communication device receives the service data before the delivery time window, the communication device caches the service data; it can be understood that, when the service data arrives at the communication device in advance, the communication device may buffer the service data, and when the delivery time window arrives, the service data is delivered to the target protocol layer or the target communication node, which may avoid delivering the service data in advance, thereby implementing certainty of controlling the delay.

In a possible implementation manner, the processing, by the communication device, the delivery of the service data according to the delivery time window may further include: when the communication equipment receives the service data after the submission time window, giving up submission of the service data; in this embodiment of the present application, if the communication device receives the service data after the delivery time window, that is, it indicates that the service data is overtime, the communication device may control the delivery of the service data, and abandon the delivery of the service data, so as to improve the certainty of the time delay.

In a possible implementation manner, the communication device records a transmission state of the service data, where the transmission state includes transmission success, transmission failure, loss, timeout, and the like; the first network device may be favorable to improve reliability of a next data packet by recording a transmission state of the service data.

In a possible implementation manner, further, the communication device sends indication information to the network device, where the indication information is used to indicate a transmission state of the service data, and the indication information may include a sequence number of the data packet, so that after receiving the indication information, the network device is favorable to adjust a subsequent scheduling policy, and improves reliability of a next data packet.

In a third aspect, an embodiment of the present application provides a communication system, where the communication system is located in a communication device, and the communication device communicates with an opposite-end communication device according to a protocol architecture, where the protocol architecture includes a physical layer, a transport layer, and a synchronization layer, and the physical layer is configured to receive a data packet from the opposite-end communication device; the transmission layer is used for analyzing the data packet and sending the data packet to the synchronization layer; the synchronization layer is used for time control of data packets.

In one possible implementation, the first time information and the second time information carried in the data packet are obtained.

In one possible implementation, the time control includes: and controlling the delivery of the data packet to the target communication node or the target protocol layer according to the first time information and the second time information.

In one possible implementation, when the communication device is a terminal or a base station, the transport layer includes a MAC layer, an RLC layer, and a PDCP layer.

In one possible implementation, the transport layer further includes an SDAP layer.

In one possible implementation, when the communication device is a base station or a core network device, the transport layer includes a MAC layer, a UDP/IP layer, and a GTP-U layer.

In one possible implementation, the time control includes: and controlling the delivery of the data packet to the target communication node or the target protocol layer according to the current time, the first time information and the second time information.

In a fourth aspect, an embodiment of the present application provides a communication system, where the communication system is located in a communication device, and the communication device communicates with an opposite-end communication device according to a protocol architecture, where the protocol architecture includes a physical layer, a transport layer, and a synchronization layer, where the synchronization layer is configured to receive data and perform time control on the data; the transmission layer is used for encapsulating data and sending encapsulated data packets to the physical layer; the physical layer is used for sending data packets to the opposite-end communication device.

In one possible implementation, the time control includes: and controlling to send the first time information to the opposite-end communication device.

In one possible implementation, the time control includes: and adding second time information in the data, and delivering the data added with the second time information to the transmission layer.

In a fifth aspect, an embodiment of the present application provides a network device, which includes a unit configured to perform the steps performed by the network device in the above aspect.

In a sixth aspect, embodiments of the present application provide a network device that includes at least one processor and an interface circuit, where the at least one processor is configured to perform the method performed by the network device in the above aspect.

In a seventh aspect, an embodiment of the present application provides a storage medium, which includes a program, and the program is used for executing the method performed by the network device in the above aspects when executed by a processor.

In an eighth aspect, the present application provides a communication device, which includes a unit configured to perform each step performed by the first communication device or the second communication device in the above aspects.

In a ninth aspect, embodiments of the present application provide a communication device, which includes at least one processor and an interface circuit, where the at least one processor is configured to execute the method performed by the first communication device or the second communication device in the above aspects.

In a tenth aspect, an embodiment of the present application provides a terminal, including a communication device for performing the eighth and ninth aspects.

In an eleventh aspect, an embodiment of the present application provides a storage medium containing a program that, when executed by a processor, performs the method performed by the first communication device or the second communication device in the above aspects.

In this embodiment of the present application, a first network device, as an intermediate node of two-part network transmission, may participate in transmission of two parts, namely, a wireless network and a wired network (taking wired transmission between a network device and a core network device as an example), and the first network device determines transmission of processing service data according to first time information and second time information, for example, the transmission of the processing data may include performing accelerated transmission, normal transmission, or delayed transmission, to implement mutual compensation of two periods of time delay of wired transmission and wireless transmission, so that the certainty of time delay of data transmission from the first communication device to the second communication device may be improved, and the influence of the wireless transmission on a control technology may be reduced.

Drawings

Fig. 1 is a schematic architecture diagram of an example of a communication system in an embodiment of the present application;

fig. 2 is a schematic architecture diagram of another example of a communication system in the embodiment of the present application;

fig. 3 is a schematic architecture diagram of another example of a communication system in the embodiment of the present application;

FIG. 4 is a flowchart illustrating steps of an embodiment of a method for data transmission according to an embodiment of the present application;

FIG. 5 is a flowchart illustrating steps of a method for data transmission according to another embodiment of the present application;

fig. 6 is a diagram illustrating an example of a protocol stack of a user plane in a communication system in an embodiment of the present application;

FIG. 7 is a flowchart illustrating steps of a method for data transmission according to another embodiment of the present application;

fig. 8 is a diagram illustrating another example of a protocol stack of a user plane in a communication system in an embodiment of the present application;

fig. 9 is a schematic structural diagram of an embodiment of a communication device in an embodiment of the present application;

fig. 10 is a schematic structural diagram of another embodiment of a communication device in the embodiment of the present application;

fig. 11 is a schematic structural diagram of an embodiment of a network device in an embodiment of the present application;

fig. 12 is a schematic structural diagram of another embodiment of a network device in the embodiment of the present application.

Detailed Description

The embodiment of the application provides a data transmission method and related equipment, which are used for reducing the influence of wireless transmission on a control technology.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings (if any) are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. "plurality" means two or more.

In industrial automation, industrial robots are increasingly applied to production lines, in a traditional industrial network, a wired deployment mode is generally adopted to control the industrial robots, the cable deployment and maintenance cost is high due to the wired deployment mode, and the mobility of the robots is poor due to the limitation of cables. In this regard, it is conceivable to adopt a wireless transmission method instead of a wired transmission method. For example, in a communication system, the communication system includes a terminal, an access network device, and a core network device; the terminal is in wireless connection with the access network equipment, the access network equipment is in wired connection with the core network equipment, and the time delay of the wired transmission part is relatively stable under normal conditions. Compared with the transmission quality of a wired transmission network, the quality of an air interface channel of a wireless transmission part changes rapidly under most conditions, and the time delay of air interface transmission is more uncertain. How to reduce the influence of the uncertainty of the transmission delay of the data packet on the control technology when a wireless network exists in a communication network is an urgent problem to be solved.

In order to solve the above problem, in the embodiments of the present application, a method for data transmission is provided to reduce the influence of wireless transmission on a control technology. The method is applied to a data transmission system, in one example, please refer to fig. 1, which includes a terminal 101, an access network (RAN) device 102, and a Core Network (CN) device 103; in one example, the terminal 101 is a first communication device in the following embodiment, and the core network device 103 is a second communication device in the following embodiment, or in another example, the core network device 103 is a first communication device in the following embodiment, and the terminal 101 is a second communication device in the following embodiment. The terminal 101 and the RAN device 102 may be wirelessly connected, the RAN device 102 and the core network device 103 may be wired, and optionally, the RAN device 102 and the core network device 103 may also be wirelessly connected; the RAN equipment 102 is used to access the terminal 101 to a radio network, and the core network equipment 103 is used to manage the terminal and provide a gateway for communication with an external network.

In another example, please refer to fig. 2, which is a schematic diagram of an architecture of a communication network according to an embodiment of the present application. As shown in fig. 2, the network architecture includes a core network device and a RAN device, where the RAN device includes a baseband apparatus and a radio frequency apparatus, where the baseband apparatus may be implemented by one node or by multiple nodes, and the radio frequency apparatus may be implemented independently by being pulled away from the baseband apparatus, or integrated into the baseband apparatus, or partially pulled away and partially integrated into the baseband apparatus. For example, in a Long Term Evolution (LTE) communication system, a RAN equipment (eNB) includes a baseband device and a radio frequency device, wherein the radio frequency device may be remotely located with respect to the baseband device, for example, a Remote Radio Unit (RRU) is remotely located with respect to a baseband unit (BBU).

The communication between the RAN equipment and the terminal follows a certain protocol layer structure. For example, the control plane protocol layer structure may include functions of protocol layers such as a Radio Resource Control (RRC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a physical layer. The user plane protocol layer structure can comprise functions of protocol layers such as a PDCP layer, an RLC layer, an MAC layer, a physical layer and the like; in one implementation, a Service Data Adaptation Protocol (SDAP) layer may be further included above the PDCP layer.

The functions of these protocol layers may be implemented by one node, or may be implemented by a plurality of nodes; for example, in an evolved structure, a RAN device may include a Centralized Unit (CU) and a Distributed Unit (DU), and a plurality of DUs may be centrally controlled by one CU. RAN equipment may implement functions of protocol layers such as Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), and Media Access Control (MAC) by one node; or the functions of these protocol layers may be implemented by multiple nodes; for example, in an evolved structure, a RAN device may include a Centralized Unit (CU) and a Distributed Unit (DU), and a plurality of DUs may be centrally controlled by one CU. As shown in fig. 2, the CU and the DU may be divided according to protocol layers of the radio network, for example, functions of a PDCP layer and above protocol layers are provided in the CU, and functions of protocol layers below the PDCP layer, for example, functions of an RLC layer and a MAC layer, are provided in the DU.

This division of the protocol layers is only an example, and it is also possible to divide the protocol layers at other protocol layers, for example, at the RLC layer, and the functions of the RLC layer and the protocol layers above are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; alternatively, the functions are divided into some protocol layers, for example, a part of the functions of the RLC layer and the functions of the protocol layers above the RLC layer are provided in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are provided in the DU. In addition, the processing time may be divided in other manners, for example, by time delay, a function that needs to satisfy the time delay requirement for processing is provided in the DU, and a function that does not need to satisfy the time delay requirement is provided in the CU. In addition, the radio frequency device may be pulled away, not placed in the DU, or integrated in the DU, or partially pulled away and partially integrated in the DU, which is not limited herein.

With continued reference to fig. 3, with respect to the architecture shown in fig. 2, the Control Plane (CP) and the User Plane (UP) of the CU may be separated and implemented by being divided into different entities, namely a control plane CU entity (CU-CP entity) and a user plane CU entity (CU-UP entity). In the above network architecture, the signaling generated by the CU may be transmitted to the terminal through the DU, or the signaling generated by the terminal may be transmitted to the CU through the DU. The DU may pass through the protocol layer encapsulation directly to the terminal or CU without parsing the signaling. In the following embodiments, if transmission of such signaling between the DU and the terminal is involved, in this case, the transmission or reception of the signaling by the DU includes such a scenario. For example, the signaling of the RRC or PDCP layer is finally processed as the signaling of the PHY layer to be transmitted to the terminal, or converted from the received signaling of the PHY layer. Under this architecture, the signaling of the RRC or PDCP layer can also be considered to be sent by the DU, or by the DU and the radio frequency. In the above embodiment, the CU is divided into the network devices on the RAN side, and in addition, the CU may also be divided into the network devices on the CN side, which is not limited herein.

The apparatus in the following embodiments of the present application may be, according to the functions implemented by the apparatus, when the above CU-DU structure is adopted, the network device may be a CU node, or a DU node, or an access network device including the CU node and the DU node.

The functions and specific implementations of the terminal, the access network device and the core network device listed above are merely exemplary illustrations, and the present application is not limited thereto.

In this embodiment, the terminal and the core network device may be referred to as an edge device (or an edge node) of a wireless network, and the edge device is connected to the core network device through a network device. The two edge devices are respectively called a first communication device and a second communication device, wherein the first communication device is a terminal, and the second communication device is a core network device; or, the first communication device is a core network device, and the second communication device is a terminal. And one edge device sends first time information and second time information related to the service data to the other edge device through the network device, wherein the edge device receiving the first time information and the second time information determines a delivery time window of the service data according to the first time information and the second time information, and processes the delivery of the service data according to the delivery time window. Therefore, the edge device can submit the service data to the upper layer or the next node at the determined time according to the first time information and the second time information, so as to realize deterministic submission, reduce the uncertainty of time delay and reduce the influence of wireless transmission on the control technology.

In addition, the network device may also obtain first time information and second time information related to the service data, and then process transmission of the service data according to the first time information and the second time information. The network device, as an intermediate node, may participate in the transmission of both the wired network and the wireless network (taking the wired transmission between the network device and the core network device as an example), and the network device may determine, according to the first time information and the second time information corresponding to the received data packet, whether the actual arrival time of the data packet is earlier or later than the expected arrival time. The network device determines the scheduling priority of the data packet according to the arrival state of the received data packet, for example, the scheduling priority comprises accelerated transmission, normal transmission or delayed transmission, etc. For example, in an example, in a transmission process of downlink data, that is, a core network device sends a data packet to a terminal, a network device serves as an intermediate node between the core network device and the terminal, and when the network device receives the data packet sent by the core network device, the network device determines that a time lag between the data packet and an expected arrival time is caused, the network device may accelerate transmission of the data packet to the terminal to implement mutual compensation of two-stage time delays of wired transmission and wireless transmission, so that a time delay of data transmission from the core network device to the terminal may be within a certain range, and an influence of uncertainty of the transmission time delay on a control technology is reduced.

The first time information may be jitter information of a time delay, and the second time information may be a time stamp corresponding to the service data.

It should be understood that the embodiments of the present application can be applied to various communication systems, and the architecture of the communication system in fig. 1 is only an exemplary illustration. For example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an advanced long term evolution (LTE-a) system, a Universal Mobile Telecommunications System (UMTS), a Wireless Local Area Network (WLAN), a wireless fidelity (WiFi), or a next-generation communication system, etc., where the next-generation communication system may include, for example, a fifth-generation (5G) communication system. The communication system will support not only conventional communication but also, for example, device to device (D2D) communication, machine to machine (M2M) communication, Machine Type Communication (MTC), and Vehicle to Vehicle (V2V) communication.

For convenience of understanding, terms referred to in the embodiments of the present application are explained first:

1. a terminal, also referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice/data connectivity to a user, such as a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like. For example, in the embodiment of the present application, the terminal may be described by taking a wireless terminal in industrial control as an example.

2. A network device is a device in a wireless network, such as a Radio Access Network (RAN) node that accesses a terminal to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), 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 Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node.

3. The core network device may be connected to a plurality of access network devices, and may control the access network devices, and may distribute data received from other networks (e.g., the internet) to the access network devices. For example, in an LTE network architecture, a core network control plane node is a Mobility Management Entity (MME), and a core network user plane node includes a serving gateway (S-GW) and a packet data network gateway (P-GW); in a 5G network, a core network control plane node is an access and mobility management function (AMF) entity, and a core network user plane node is a User Plane Function (UPF) entity.

4. Latency (latency): the time it takes for data to be transferred from one node to another.

5. Jitter (jitter): the variation range for describing the time delay may have a corresponding relationship with the service, and different services may have different jitters. The larger the jitter, the more unstable the delay, and the smaller the jitter, the more stable the delay. In a specific implementation, jitter may be a specific jitter value, such as 0.5ms for jitter; alternatively, there may be an indication or index, such as enumerated values of 1 through 10, with each digit corresponding to a jitter value, such as 1 for 0.1ms, 2 for 0.2ms, and so on. Alternatively, Jitter may be expressed in percentage, which may be a percentage of the service data packet period in one example, such as 1ms for the service data packet period and 50% for the Jitter, which is 0.5ms for the Jitter. In another example, the percentage is a percentage of the delay, e.g., delay is 2ms, jitter is 50% delay, and then jitter is 1 ms.

The variation range of the time delay is described by jitter: jitter is a fixed time, the range of delay is [ delay-Jitter, delay + Jitter ]. In one example, jitter may be a value, expressed symmetrically by a value [ -jitter, + jitter ], such as jitter of 0.5ms, and latency range of [ latency-0.5 ms, latency +0.5ms ]; in another implementation, jitter may also be two values (+ jitter) and (-jitter), such as (+0.5ms) and (-0.5ms), respectively, and the range of delay expressed by these two values is [ delay-0.5 ms, delay +0.5ms ].

6. And (3) deterministic transmission: the time delay is controlled within a certain time range, namely, the data packet can always reach the opposite end within a certain time range.

7. "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.

In the following, a detailed description is given to a data transmission method provided in an embodiment of the present application, referring to fig. 4, an embodiment of a data transmission method is provided in the embodiment of the present application, in this example, an edge node (i.e., a communication device) controls a delivery time of service data, so as to achieve improvement of certainty of a time delay when a first communication device transmits service data to a second communication device. The edge node in this example includes a terminal and a core network device, and by way of example and not limitation, the first communication device is the core network device, and the second communication device is the terminal; or, the first communication device is a terminal, and the second communication device is a core network device. In this example, the first communication device takes a core network and the second communication device takes a terminal as an example.

Step 401, the core network device sends the first time information to the network device.

The first time information is jitter (jitter) information, and the jitter has a corresponding relationship with the type of the service. The core network equipment sends the jitter to the network equipment through the control plane; optionally, the core network device sends the Qos parameter to the network device through the control plane, where the Qos parameter includes jitter.

Step 402, the network device receives the first time information and sends the first time information to the terminal.

The network equipment receives the first time information and sends the first time information to the terminal through the control surface.

Step 403, the core network device sends the service data and the second time information to the network device.

The core network equipment sends a data packet to the network equipment through a user plane, the data packet comprises service data and second time information, the second time information is a timestamp, and the timestamp comprises the delivery time of the service data at a terminal, or the receiving time when the core network equipment receives the service data or the sending time when the core network equipment sends the service data to the network equipment; the delivery time may include a reference delivery time or a suggested delivery time, where the suggested delivery time is a time suggested to deliver data to the terminal, or the reference delivery time is a time referred to when the terminal delivers data; the reference delivery time or the suggested delivery time may be a time instant or a time range; when the reference delivery time or the suggested delivery time is a time, the time may be the reference delivery time or the suggested delivery time, or the earliest delivery time or the latest delivery time.

Step 404, the network device sends the service data and the second time information to the terminal.

And the network equipment receives the service data and the second time information and sends the service data and the second time information to the terminal through the user plane.

Step 405, the terminal receives the service data and the second time information, and the terminal determines a delivery time window according to the first time information and the second time information.

The terminal determines a delivery time window according to the first time information and the second time information, where the delivery time window is a time range in which the terminal delivers the service data to the target layer, and the delivery time window is taken as an example and not limited to:

if the timestamp is the reference submission time, the submission time window is equal to (the reference submission time-jitter-delta, the reference submission time + jitter-delta); or the like, or, alternatively,

if the timestamp is the earliest delivery time, the delivery time window is equal to (the earliest delivery time-delta, the earliest delivery time + jitter-delta); or the like, or, alternatively,

if the timestamp is the earliest delivery time, the delivery time window is equal to (the earliest delivery time-delta, and the earliest delivery time +2 × jitter-delta); or the like, or, alternatively,

if the timestamp is the latest delivery time, the delivery time window is equal to (the latest delivery time-jitter-delta, and the latest delivery time-delta); or the like, or, alternatively,

if the timestamp is the latest delivery time, the delivery time window is equal to (the latest delivery time-2 × jitter-delta, the latest delivery time-delta), and in this example, the delta is the scheduling duration of the wireless transmission air interface.

And step 406, the terminal processes the submission of the service data according to the submission time window.

In one case, the time when the terminal receives the service data is before the delivery time window, specifically, the delivery time window includes the earliest time and the latest time, when the time when the terminal receives the service data is before the earliest time, the terminal caches the service data, and when the delivery time window is reached, the terminal delivers the service data to the target protocol layer. In this example, if the terminal receives the service data before the earliest time of the delivery time window, the service data is cached first, and the first service is delivered to the target protocol layer when the delivery time window is reached, so that the service data can be prevented from being delivered to the upper layer in advance, and the deterministic control of the time delay is realized. The target protocol layer may be, for example, an application layer.

In another case, the time when the terminal receives the service data is after the delivery time window, specifically, when the time when the terminal receives the service data is after the latest time, the terminal gives up the delivery of the service data; in this example, when the terminal receives the service data, and the service data is already overtime, the terminal may directly discard the service data, and the terminal controls the delivery of the service data according to the delivery time window, so as to improve the certainty of the time delay.

Referring to fig. 5, in this example, the first network device may control time, so as to implement that the received data packet is sent out at an appropriate time, and delay is balanced or compensated between wired transmission and wireless transmission (taking wired transmission between the network device and the core network device as an example, which is also applicable to a case of wireless transmission between the network device and the core network device). The terminal side determines a delivery time window after receiving the data packet, and controls delivery of the service data in the delivery time window, which is described in this example by taking downlink data transmission as an example, that is, the first communication device is described by taking core network equipment, and the second communication device is described by taking the terminal as an example.

Step 501, a first network device receives first time information.

The first network device receives first time information through a control plane, where the first time information may be jitter (jitter) information, and the jitter may have a corresponding relationship with a type of a service.

In one implementation, the core network device sends a Qos parameter to the first network device through the control plane, where the Qos parameter includes jitter. Specifically, the core network device sends the jitter to the first network device through a bearer management (e.g., bearer establishment, bearer modification) procedure and a handover procedure. And the first network equipment receives the jitter sent by the core network equipment through the control plane.

Optionally, for a periodic service, the first network device may also receive a period (cycle time) of the service when receiving the jitter.

In another implementation, the first network device receives Qos parameters of the service from a second network device adjacent to the first network device, where the Qos parameters include jitter. Specifically, the adjacent second network device may send the jitter to the first network device through a bearer handover procedure. The first network equipment receives the jitter sent by the adjacent second network equipment.

Optionally, when receiving the first time information, the first network device further receives an identifier of a service corresponding to the service data, where the identifier may be represented as follows:

in an implementation manner, the identifier issued by the core network device to the first network device is as shown in table 1 below:

TABLE 1

As shown in table 1 above, 1 Protocol Data Unit (PDU) session identifier (session ID) corresponds to 1 GTP tunnel identifier (GTP tunnel ID), one GTP tunnel ID corresponds to N QoS flow identifiers (QoS flow indicators), N is a positive integer greater than or equal to 1, and each QoS flow indicator corresponds to one jitter.

Optionally, the identifier sent by the core network device to the first network device may further include an identifier of an evolved radio access bearer (E-RAB), where N QoS Flow indicators correspond to N evolved radio access bearers (E-RABs), and each E-RAB corresponds to a jitter.

In an implementation manner, when the N jitter settings are the same, the identifier corresponding to the service may be a PDU session ID or a GTP tunnel ID. At this time, the N QoS flow indicators may also be set to be the same, and then the QoS flow indicator may also be used as the identifier corresponding to the service at this time. At this time, the identifiers may be used to identify the service, where the identifiers may be used by the first network device to determine the service data corresponding to the service, where the jitter is the jitter corresponding to the service, and the jitter and the service data have a corresponding relationship, that is, the jitter is used for the service data.

In another implementation manner, when the settings of the N jitters are different, the N QoS flow indicators and the N jitters have a one-to-one correspondence relationship, the identifier corresponding to the service may be the QoS flow indicator, and the first network device may identify the jitters corresponding to the service by identifying the identifier.

Step 502, the first network device sends the first time information to the terminal.

The first network equipment sends first time information (jitter) to the terminal through the control surface; optionally, the first network device sends the first time information to the terminal, and further sends an identifier, where the identifier is used to identify the service data and the jitter, and the identifier may be a stream identifier, a logical channel identifier, or a radio bearer identifier. The identifier is used for the terminal to determine the service corresponding to the identifier, and the jitter and the service data corresponding to the service, that is, the identifier is used for the terminal to determine which service data the jitter is used for.

Step 503, the core network device sends the service data and the second time information to the first network device.

The core network device sends a data packet to the first network device through the user plane, wherein the data packet comprises service data and second time information.

The second time information is a timestamp, which may be set at an upstream node (3rd Generation Partnership Project, 3GPP) external node of the core network device, for example, an application server, and then sent to the core network device, or may be set by the core network device. In the embodiment of the present application, the timestamp is set by a core network device for example.

1) The location where the timestamp is carried may be:

please refer to fig. 6, in which fig. 6 is a schematic diagram of a protocol stack of the user plane.

Optionally, when the GTP-U layer processes the service data, the timestamp is added to the packet of the GTP-U layer, that is, the SYNC and GTP-U layers are unified.

Optionally, a protocol layer may be added to perform time control. For example, a synchronization layer (SYNC) can be further included above the GTP-U layer, and a timestamp is added to a packet of the SYNC layer.

Optionally, a MAC layer may be further included above the GTP-U, and the MAC layer is an ethernet protocol layer, and a timestamp may be added to a packet at the MAC layer.

For example, when the timestamp is carried in a packet of the GTP-U layer, the timestamp is extended in a header of the packet of the GTP-U layer for a next extension header field value (next extension header field value) field of the GTP-U protocol, and the format thereof is as shown in table 2 below:

TABLE 2

For example, when the value of the GTP-U extension Header field is the value corresponding to the predefined timestamp (e.g., 10000100), the content of the next field representing this field indicates the timestamp.

2) The content of the time stamp may include:

the timestamp may include a delivery time of the service data at the terminal, or the timestamp includes a reception time of the service data at the core network device or a transmission time of the service data at the core network device.

The delivery time may include a reference delivery time or a suggested delivery time, where the suggested delivery time is a time suggested to deliver data to the terminal; the reference delivery time is the time for reference when the terminal delivers the data; the reference delivery time or the suggested delivery time may be a time instant or a time range; if the reference delivery time or the suggested delivery time is a time, the time may be a reference delivery time or a suggested delivery time, or the time is the earliest delivery time or the latest delivery time; for example, the reference delivery time and the suggested delivery time may be delivery times with jitter of 0, and the earliest delivery time may be: referring to the delivery time-jitter, the latest delivery time is: refer to the delivery time + jitter.

The receiving time of the service data in the core network device is as follows: the upstream node (e.g., application server) of the core network device sends the service data to the core network device, and when the core network device receives the service data, the sending time of the service data at the core network device is: and the time when the core network equipment sends the service data to the network equipment.

When the timestamp is the receiving time of the service data at the core network device or the sending time of the service data at the core network device, the terminal or the network device may calculate a reasonable delivery time (e.g., the earliest delivery time, the latest delivery time, or a reference delivery time) according to the air interface transmission, the scheduling delay, and the first time information. If the time when the service data is actually received is delayed relative to the estimated time, the network device accelerates the transmission of the service data, and if the time when the service data is actually received is advanced relative to the estimated time, the network device may normally or late transmit the service.

Step 504, the first network device receives the second time information and the service data, and determines a scheduling priority according to the first time information and the second time information.

The first network device receives the data packet through the user plane, the data packet includes service data and second time information, the first network device determines the arrival state of the data packet when receiving the data packet, for example, the arrival state may be early arrival, normal arrival or late arrival, and then determines the scheduling priority of the service data according to the arrival state of the data packet (i.e., early arrival, normal arrival or late arrival).

First, the specific method for the first network device to determine the arrival state of the data packet may be:

in a first implementation manner, if the actual time when the data packet is received is the first time and the expected time when the data packet is received is the second time, the first network device may obtain the identifier of the service and the delay budget (the delay of the data packet between the core network device and the first network device) of the data packet of the service in advance. Then, the first network device may calculate, according to the delay budget, the timestamp, and the current time, a remaining duration for delivering the service data from the first network device to the terminal, and determine an arrival state or an emergency degree of the data packet according to the remaining duration.

If the remaining duration is greater than a target value (e.g., the target value is a duration for transmitting data between the first network device and the terminal under the condition of stable wireless channel), determining that the data packet arrives earlier; if the remaining time length is equal to the target value, or the remaining time length is within a target range (the target range is determined according to jitter and the target value, if the target range can be (target value-jitter, target value + jitter)), determining that the data packet arrives normally; if the remaining time is less than the target value, the packet is determined to arrive late.

In a second implementation manner, the first network device may determine whether the data packet arrives early, normally or late according to the period of the service and the first time when the data packet actually arrives. For example, the period corresponding to the service is t, the time when the first network device receives the last packet corresponding to the service is t1, and the expected time when the first network device receives the packet is t1+ t-t 2 according to the period of the packet.

If the first time is after the expected time (t2), the network device determines that the packet has arrived late;

if the first time is equal to the expected time (t2), the network device judges that the data packet arrives normally;

if the first time is before the expected time (t2), the network device determines that the packet arrived earlier.

In a third implementation manner, the network device may calculate, according to the time t0 indicated by the timestamp and the current time t1, a remaining time length for the first network device to transmit the data packet to the terminal until the terminal delivers the service data, where the remaining time length is t0-t1, and if the remaining time length is greater than a target value (for example, the target value is a time length for transmitting data between the network device and the terminal in a case that a wireless channel is stable), determine that the data packet arrives earlier; if the remaining duration is equal to the target value, judging that the data packet normally arrives; if the remaining time is less than the target value, the packet is determined to arrive late.

Optionally, in the above 3 implementation manners, the arrival status and the emergency degree may have a corresponding relationship, and by way of example and not limitation, the emergency degree includes multiple levels, such as zero level, first level, second level, third level, and the like, and if the arrival status is early arrival and normal arrival, the corresponding emergency degree corresponds to zero level (which can be understood as the lowest emergency degree); if the arrival state is delayed arrival, determining the level of the emergency degree according to the number of the remaining time, if the remaining time is less than a first threshold, determining that the emergency degree is one level, if the remaining time is greater than the first threshold and less than a second threshold, determining that the emergency degree is two levels, and if the remaining time is less than the second threshold, the first threshold is less than the second threshold, and so on, which is not exemplified herein.

Optionally, the remaining duration for the first network device to transmit the data packet to the terminal (that is, the terminal delivers the service data to the target protocol layer) may be calculated from the latest delivery time and the current time, and if the remaining duration is smaller, the time for transmitting the data packet is more urgent, where if the timestamp is the earliest delivery time, the latest delivery time is +2 jitter; if the timestamp is the reference delivery time, the latest delivery time is the reference delivery time + jitter.

It should be noted that the three implementations described above are merely exemplary for convenience of description, and are not meant to be limiting.

Then, the first network device determines a scheduling priority for the service data according to the arrival state and/or the urgency of the data packet, where the scheduling priority refers to accelerated transmission, normal transmission, or delayed transmission of the service data by using a corresponding scheduling policy.

If the data packet arrives late and the time delay consumed by the wired transmission is excessive, the air interface scheduling policy needs to be adjusted, and the first network device needs to perform accelerated transmission on the service data by using a corresponding first scheduling policy, which includes, by way of example and not limitation, increasing the priority and/or reliability of data packet transmission (for example, when the service data is transmitted, multiple copies are concurrently transmitted, and as long as any copy is received by the terminal, the data packet is successfully received, thereby increasing the reliability, or, reducing the modulation and coding policy (MCS) modulation and coding rate, thereby increasing the reliability of transmission)

In this example, if the data packet arrives late, a corresponding scheduling policy (e.g., improving priority and/or reliability of the data packet) may be adopted to accelerate wireless transmission of the data packet between the first network device and the terminal, so as to make up for extra delay introduced by transmission between the core network device and the first network device, and finally ensure that the service data can be sent to the terminal (final receiver device) on time.

If the data packet arrives normally or in advance, the data packet is transmitted normally by using a second scheduling policy, where the second scheduling policy may be to schedule the service data according to the priority and/or reliability of the service itself.

It should be noted that, in general, in comparison with the transmission quality of a wired transmission network, the quality of an air interface channel of a wireless transmission portion changes rapidly in most cases, and the time delay of wireless transmission is more uncertain, so that after receiving service data, a first network device should accelerate transmission of the data packet as much as possible to reserve more transmission time for wireless transmission; in general, after receiving a data packet, the first network device may use accelerated transmission or normal transmission, and generally does not perform delayed transmission, and when a time duration between an actual arrival time and an expected arrival time of the data packet is greater than a preset value, it indicates that the data packet arrives earlier, and optionally, the first network device may use delayed transmission, for example, may reduce priority and/or reliability of the data packet, and perform delayed transmission on the received data packet.

And 505, the first network device sends the service data and the second time information to the terminal according to the scheduling priority.

The first network device first determines the latest transmission time at which the service data and the second time information (timestamp) are transmitted to the terminal. And then transmitting the service data and the second time information to the terminal before the latest transmission time.

Specifically, if the timestamp is the reference delivery time, the latest sending time is the reference delivery time + jitter-delta, and the delta is the scheduling time length of the wireless transmission air interface;

if the timestamp is the latest delivery time, the latest sending time is the latest delivery time-delta;

if the timestamp is the earliest delivery time, the latest sending time is the earliest delivery time +2 × jitter-delta;

the first network device starts a timer at the current time, and accelerates or normally sends a data packet before the latest sending time, wherein the data packet comprises service data and second time information.

Step 506, the terminal receives the first time information, the service data and the second time information, and determines a delivery time window of the service data according to the first time information and the second time information.

The terminal receives the jitter sent by the first network device through the control plane, optionally, the terminal receives an identifier corresponding to the service when receiving the jitter, and the terminal identifies the service through the identifier, and service data and the jitter corresponding to the service.

The terminal receives a data packet sent by the first network device through the user plane, wherein the data packet comprises service data and second time information (namely a time stamp).

The delivery time window refers to a delivery time range in which the terminal delivers the service data to a previous protocol layer (a target protocol layer in the embodiment of the present application) of the protocol layer where the timestamp is located.

As will be understood with reference to fig. 6, the timestamp may be carried in a packet of SYNC, an SDAP layer, a PDCP layer, an RLC layer, or a MAC layer of a cellular network, and the last protocol layer may be an application layer (upper layer of the SYNC layer), a SYNC (upper layer of the SDAP layer), an SDAP layer (upper layer of the PDCP layer or the RLC layer), a PDCP layer, or an RLC layer (upper layer of the MAC layer). Optionally, the timestamp may also be carried in a MAC layer, where the MAC layer is located above the SYNC layer, and is a MAC protocol layer in the ethernet, and the target protocol layer is an application layer.

The terminal may determine a delivery time window (earliest time, latest time) according to the first time information and the second time information:

specifically, if the timestamp is the reference delivery time, the delivery time window is (reference delivery time-jitter-delta, reference delivery time + jitter-delta); or

If the timestamp is the earliest delivery time, the delivery time window is equal to (the earliest delivery time-delta, the earliest delivery time + jitter-delta); or

If the timestamp is the earliest delivery time, the delivery time window is equal to (the earliest delivery time-delta, and the earliest delivery time +2 × jitter-delta); or

If the timestamp is the latest delivery time, the delivery time window is equal to (the latest delivery time-jitter-delta, and the latest delivery time-delta); or

If the timestamp is the latest delivery time, the delivery time window is (latest delivery time-2 × jitter-delta, latest delivery time-delta). Or

It should be noted that the delivery time window is only an exemplary window, and is not a limitation to the delivery time window.

The method comprises the steps that a terminal submits service data to a high layer until the service data is submitted to an application layer, a timestamp is carried in a protocol layer, the closer the protocol layer is to the application layer, the shorter the interlayer processing time for processing the service data is, the more accurate the time control is, for example, if the timestamp is carried in a SYNC layer, the submitting time of the last protocol layer (namely a target protocol layer) is, namely the submitting time to the application layer, the shortest the interlayer processing time is, the more accurate the time control is, and if the timestamp is carried in the SYNC layer, the SYNC layer is a newly added protocol layer for controlling the time, the SYNC layer is used for processing the time control, other function processing can not be carried out on the service data, so that the timestamp is carried in the SYNC layer, the terminal can read timestamp information from the SYNC layer, and the data processing time is reduced; optionally, the PDCP layer has a function of providing in-sequence delivery to an upper layer, and if the timestamp is carried in the PDCP layer, the PDCP layer may perform the in-sequence delivery according to the time indicated by the timestamp.

And 507, the terminal processes the submission of the service data according to the submission time window.

In one implementation, the terminal sets a timer for the data packet, and when the timer reaches the delivery time window, the terminal delivers the service data to the target protocol layer.

In another implementation, first, the terminal may determine the current arrival state of the service data according to the current time and the delivery time window.

The delivery time window is a time range between the earliest time and the latest time; and if the receiving time of the service data received by the terminal is before the earliest time, determining that the current arrival state of the service data is the early arrival state.

And if the receiving time of the service data received by the terminal is behind the latest time, determining that the current arrival state of the service data is the delayed arrival.

And if the receiving time of the service data received by the terminal is between the earliest time and the latest time, determining that the current arrival state of the service data is normal arrival.

Further, the terminal may process the service data according to the arrival state of the service data.

If the arrival state of the service data is the early arrival, the service data is cached to the protocol layer, and the terminal submits the service data to the target protocol layer in a submission time window.

Optionally, the terminal may record the transmission status of the data packet, where the status of the data packet is successful reception. In this example, if the terminal receives the service data before the earliest time of the delivery time window, the service data is cached first, and when the delivery time window is reached, the service data is delivered to the target protocol layer, so that the service data can be prevented from being delivered to the upper layer in advance, and deterministic control of time delay is realized; in this example, a buffer function at the terminal side is used to achieve certainty of data transmission delay from the core network device to the terminal.

Optionally, if the receiving time of the service data received by the terminal is after the latest time, the terminal discards the data packet, and records the transmission state of the data packet, for example, the transmission state is timeout, and feeds back indication information to the first network device, where the indication information is used to indicate the transmission state of the data packet, and the indication information may include a sequence number of the data packet, so as to notify the first network device that the current data is timeout, so that the first network device adjusts the scheduling policy, and ensures reliability of the data packet.

Optionally, if the data packet fails or is lost, the terminal records the state (failure or loss) of the data packet, and feeds back indication information to the first network device, where the indication information is used to indicate that the transmission state of the data is failure or loss, so as to avoid loss of two consecutive data packets, so that after receiving the indication information, the first network device improves reliability of a next data packet.

In an example, the receiving time of the service data received by the first network device is after the latest sending time in step 505, it is determined that the service data is overtime, and the transmission state (e.g., time out) of the service data is recorded when the service data reaches the first network device.

The above discarding (discard) of the traffic data may also be referred to as skipping (skip) of the delivery or transmission of the traffic data.

Optionally, if the data packet fails, times out, or loses, the first network device may record a transmission status of the data packet, where the transmission status includes loss, failure, or time out. In this example, the first network device records the status of the data packet in order to facilitate the transmission of subsequent data packets. For example, if a data packet fails, times out, or loses packets, the network device of the next data packet needs to improve reliability, ensure the success of the next data packet, and avoid the failure of two consecutive data packets, which causes system alarm or exception.

Optionally, the first network device receives a transmission cycle corresponding to the service data from the core network device through the control plane; and when the first network equipment sends the jitter to the terminal through the control plane, the first network equipment also sends the transmission period to the second communication equipment, and the first network equipment transmits subsequent service data to the terminal according to the transmission period. In this example, the core network device does not need to stamp a time stamp for each data packet of the service data, and may stamp a time stamp in the first data packet when sending the first data packet corresponding to the service, and the time stamp corresponding to the subsequent data packet corresponding to the service may be calculated according to the time stamp and the transmission cycle of the first data packet, and the time stamp is not needed to stamp in the subsequent data packet, so as to save overhead.

Referring to fig. 7, an embodiment of a method for data transmission is provided in the embodiment of the present application, and in this example, uplink data transmission is taken as an example for brief description, that is, a first communication device is taken as a terminal, and a second communication device is taken as a core network device for description.

Step 701, the network device receives first time information.

Please refer to step 501 in the embodiment corresponding to fig. 5 for understanding, which is not described herein.

Step 702, the terminal sends the service data and the second time information to the network device.

And the terminal sends a data packet to the network equipment through the user plane, wherein the data packet comprises service data and second time information. The second time information is a time stamp.

The location where the timestamp is carried may be:

as will be understood in conjunction with fig. 6, fig. 6 is a schematic diagram of a protocol stack of a user plane, and the time stamp may be carried in a packet of a SYNC layer, an SDAP layer, a PDCP layer, or an RLC layer. Optionally, the timestamp may also be carried in a MAC layer, where the MAC layer is located above the SYNC layer, and the MAC layer is a MAC protocol layer in the ethernet.

The content of the time stamp includes:

the delivery time of the service data in the core network device, or the sending time of the service data in the terminal. The delivery time may include a reference delivery time or a suggested delivery time, where the suggested delivery time is a time suggested to deliver data to the core network device; the reference submission time is the time for reference when the core network device submits the data; the reference delivery time or the suggested delivery time may be a time instant or a time range; if the reference delivery time or the suggested delivery time is a time, the time may be the reference delivery time or the suggested delivery time, or the time may be the earliest delivery time or the latest delivery time.

Step 703, the network device receives the second time information and the service data, and determines a scheduling priority according to the first time information and the second time information.

The network device receives the data packet through the user plane, the data packet comprises service data and second time information, the network device judges whether the data packet arrives early, arrives normally or arrives late, and then determines the dispatching priority of the service data according to the arrival state of the data packet (i.e. early arrival, arrives normally or arrives late),

if the data packet arrives late, which means that the time delay consumed by the wireless transmission is too long, and the scheduling policy of the wired transmission needs to be adjusted, the network device needs to perform accelerated transmission on the service data by using a corresponding first scheduling policy, which includes, by way of example and not limitation, transmitting the service data by using a higher-level priority stream or bearer, so as to complete the wired transmission as soon as possible, make up for the extra time delay introduced by the wireless transmission network, and finally ensure that the data can be sent to the core network device on time.

Please refer to step 503 in the embodiment corresponding to fig. 5 for understanding, which is not described herein.

Step 704, the network device sends the service data and the second time information to the core network device according to the scheduling priority.

The network device needs to determine the latest sending time of the service data and the second time information (timestamp) to the core network device. And then transmitting the service data and the time stamp to the core network device before the latest transmission time.

Specifically, if the timestamp is the reference delivery time, the latest sending time is the reference delivery time + jitter-delta; or the like, or, alternatively,

if the timestamp is the latest delivery time, the latest sending time is the latest delivery time-delta; or the like, or, alternatively,

if the timestamp is the earliest delivery time, the latest sending time is the earliest delivery time +2 × jitter-delta; in this example, delta is the duration of time for a data packet to be sent from the base station to the core network device.

The network device starts a timer at the current time, and when the timer is before the latest sending time, the network device accelerates or normally sends a data packet, wherein the data packet comprises service data and a time stamp.

Step 705, the core network device receives the service data and the second time information sent by the network device, and determines a delivery time window of the service data according to the first time information and the second time information.

The core network device can identify an identifier corresponding to the service according to the bearer of the service data, determine first time information corresponding to the service according to the identifier, and receive a data packet sent by the network device through the user plane, where the data packet includes the service data and a timestamp. The delivery time window refers to a delivery time range in which the core network device delivers the service data to a target communication node (a 3GPP external node, e.g., an application server).

The core network device determines a delivery time window (the earliest time and the latest time) according to the first time information and the second time information:

if the timestamp is the reference delivery time, the delivery time window is (reference delivery time-jitter, reference delivery time + jitter); or the like, or, alternatively,

if the timestamp is the earliest delivery time, the delivery time window is equal to (the earliest delivery time, the earliest delivery time + jitter); or the like, or, alternatively,

if the timestamp is the earliest delivery time, the delivery time window is equal to (the earliest delivery time, the earliest delivery time +2 × jitter); or the like, or, alternatively,

if the timestamp is the latest delivery time, the delivery time window is equal to (the latest delivery time-jitter, the latest delivery time); or the like, or, alternatively,

if the timestamp is the latest delivery time, the delivery time window is (latest delivery time-2 × jitter, latest delivery time).

Step 706, the core network device may process the submission of the service data according to the submission time window.

In one implementation, the core network device starts a timer, and when the timer indicates that the delivery time window is reached, the core network device delivers the service data to the target node (e.g., the application server).

In another implementation, first, the core network device may determine a current arrival state of the service data according to the current time and the delivery time window.

Step 507 in the corresponding embodiment of fig. 5 is combined for understanding, and is not described herein again.

Then, the core network device processes the service data according to the arrival state of the service data.

If the arrival state of the service data is the arrival in advance, the core network equipment caches the service data, and the core network equipment sends the service data to the target node in the delivery time window. Optionally, the core network device may record a transmission status of the data packet, where the status of the data packet is successful reception.

In this example, if the core network device receives the service data before the earliest time of the delivery time window, the service data is cached first, and the first service is sent to the target communication node (e.g., the application server) until the delivery time window is reached, so that the service data is prevented from being sent to the target node in advance to implement deterministic control of the time delay.

Optionally, if the receiving time of the service data received by the core network is after the latest time, that is, the data packet is overtime, the data packet is discarded, the transmission state (overtime) of the data packet is recorded, and indication information is fed back to the network device, where the indication information is used to indicate the transmission state of the data packet, and notify the network device that the current data is overtime, so that the network device side adjusts the scheduling policy to ensure the reliability of the data packet.

Optionally, if the data packet fails or is lost, the core network device records a state of the data packet (e.g., fails or is lost), and feeds back indication information to the network device, where the indication information is used to indicate that the transmission state of the data is failed or lost, so as to avoid loss of two consecutive data packets, and after receiving the indication information, the network device improves reliability of a next data packet.

In the embodiment of the present application, time can be controlled by a network device, so that a received data packet is sent out at a proper time, and delay is balanced or compensated between wired transmission and wireless transmission (taking wired transmission between the network device and a core network device as an example, which is also applicable to a case of wireless transmission between the network device and the core network device). And after receiving the data packet, the core network equipment determines a delivery time window and controls the delivery of the service data to the target node in the delivery time window, so that the delay certainty of data transmission from the terminal to the core network equipment is improved.

In the above embodiment, the network device is an optional operation as an intermediate node for controlling time, and the network device may also perform time control only by an edge node, such as a terminal or a core network device, without controlling time.

In an embodiment of the present application, a communication system is further provided, where the communication is located in a communication device, where the communication device may be a terminal, a network device, or a core network device, and the communication device communicates with an opposite-end communication device according to a protocol architecture, please refer to fig. 8, where fig. 8 is a schematic diagram of the protocol architecture, and the protocol architecture includes a physical layer, a transport layer, and a synchronization layer.

In a first implementation manner, the communication device is a terminal, and the opposite-end communication device is network equipment;

in a second implementation manner, the communication device is a network device, and the opposite-end communication device is a terminal or a core network device;

in a third implementation manner, the communication device is a core network device, and the peer communication device is a network device.

The physical layer is used for receiving a data packet from the opposite-end communication device;

the transmission layer is used for analyzing the data packet and sending the data packet to the synchronization layer;

the synchronization layer is used for time control of data packets.

In the above three implementations, the time control includes: and acquiring first time information and second time information carried in the data packet, wherein the first time information is jitter, and the second time information is a time stamp.

Optionally, in the first implementation manner, the time control includes: and the synchronous layer controls the delivery time window to deliver the data packet to the target protocol layer according to the current moment, the first time information and the second time information.

Optionally, in the second implementation manner, the time control includes: and indicating the acquired first time information and the acquired second time information to a transmission layer, and scheduling by the transmission layer according to the first time information and the second time information. Optionally, the time control further includes: and determining the latest sending time according to the first time information and the second time information, and controlling to send the data packet before the latest sending time.

Optionally, in the third implementation manner, the time control includes: and the synchronization layer controls to deliver the data packet to a target communication node (a node outside the 3GPP, such as an application server) within a delivery time window according to the first time information and the second time information.

Optionally, in the first and second implementation manners, when the communication device is a terminal or a base station, the transport layer includes a MAC layer, an RLC layer, and a PDCP layer. Further, the transport layer further includes an SDAP layer. Optionally, in the second and third implementation manners, when the communication device is a base station or a core network device, the transport layer includes an MAC layer, a UDP/IP layer, and a GTP-U layer.

In this embodiment, the first time information and the second time information are obtained through a synchronization layer in a protocol architecture, and delivery of a data packet to a target communication node or a target protocol layer is controlled within a delivery time window, so that certainty of time delay is achieved.

In the foregoing embodiments, the present application further provides a communication system, where the communication is located in a communication device, where the communication device may be a terminal or a core network device, and the communication device communicates with a peer communication device according to a protocol architecture, where the protocol architecture includes a physical layer, a transport layer, and a synchronization layer.

In a first implementation manner, the communication device is a core network device, and the opposite-end communication device is a network device;

in a second implementation manner, the communication device is a terminal, and the opposite-end communication device is network equipment;

in a third implementation manner, the communication device is a network device, and the communication device is a terminal or a core network device.

The synchronous layer is used for receiving data from an upper layer and carrying out time control on the data;

optionally, in the first implementation manner and the second implementation manner, the time control includes: and controlling to send first time information to the opposite-end communication device, wherein the first time information is jitter.

Optionally, in the first, second, and third implementation manners, the time control includes: adding second time information in the data, and delivering the data added with the second time information to the transmission layer.

Optionally, in the third implementation manner, the time control further includes controlling to transmit the data packet before the latest transmission time.

The transmission layer is used for encapsulating data and sending encapsulated data packets to the physical layer;

the physical layer is used for sending data packets to the opposite-end communication device.

Optionally, in the second and third implementations, when the communication device is a terminal or a base station, the transport layer includes a MAC layer, an RLC layer, and a PDCP layer. Further, the transport layer further includes an SDAP layer.

Optionally, in the foregoing one or third implementation manners, when the communication device is a base station or a core network device, the transport layer includes an MAC layer, a UDP/IP layer, and a GTP-U layer.

The claimed embodiments also provide apparatus for implementing any one of the above methods, for example, an apparatus is provided that includes means for implementing each step performed by a terminal in any one of the above methods. For another example, another apparatus is also provided, which includes means for performing each step performed by a network device in any one of the above methods. There is also provided another apparatus comprising means for performing the steps performed by the core network device in any of the above methods.

Specifically, please refer to fig. 9, where fig. 9 is a schematic structural diagram of an embodiment of a communication device 900 provided in the present application, where the communication device may be a terminal or a core network device, and the communication device includes:

a receiving unit 901, configured to receive first time information, service data, and second time information, where the first time information and the second time information are used to determine a delivery time window of the service data at a communication device;

a processing unit 902, configured to determine a delivery time window according to the first time information and the second time information received by the receiving unit 901;

a sending unit 903, configured to deliver the service data to the target node or the target protocol layer within the delivery time window determined by the processing unit 902.

In a possible implementation manner, the receiving unit 901 is further configured to receive, through a control plane, first time information sent by the network device;

and receiving a data packet sent by the network equipment through the user plane, wherein the data packet comprises service data and second time information.

In a possible implementation manner, the receiving unit 901 is further configured to, when receiving the first time information, further receive an identifier, where the identifier is used to identify the service data.

In one possible implementation, the identification includes at least one of a flow identification, a logical channel identification, and a radio bearer identification.

In a possible implementation manner, the first time information is jitter information, the second time information is a timestamp, and the timestamp includes an earliest delivery time, a latest delivery time, or a reference delivery time of the service data at the communication device, or the timestamp includes a receiving time or a transmitting time of the service data.

In a possible implementation manner, the receiving unit 901 is further configured to receive service data;

the processing unit 902 is further configured to record a transmission status of the service data.

In a possible implementation manner, the sending unit 903 is further configured to send indication information to the network device, where the indication information is used to indicate a transmission state of the service data.

In one possible implementation, the transmission status includes a timeout or a transmission failure.

In one possible implementation, the delivery time window includes an earliest time and a latest time; if the receiving time of the service data received by the communication device is before the earliest time, the terminal further includes a storage unit 904;

the storage unit 904 is also used for caching the service data.

It should be understood that the division of the units in the above apparatus is only a division of logical functions, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And the units in the device can be realized in the form of software called by the processing element; or may be implemented entirely in hardware; part of the units can also be realized in the form of software called by a processing element, and part of the units can be realized in the form of hardware. For example, each unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory in the form of a program, and a function of the unit may be called and executed by a processing element of the apparatus. In addition, all or part of the units can be integrated together or can be independently realized. The processing element may be a processor, and may be an integrated circuit having signal processing capabilities. In the implementation process, the steps of the method or the units above may be implemented by integrated logic circuits of hardware in a processor element or in a form called by software through the processor element.

In one example, the units in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), or a combination of at least two of these Integrated Circuit formats. As another example, when a Unit in a device may be implemented in the form of a Processing element scheduler, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of invoking programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above unit for receiving is an interface circuit of the apparatus for receiving signals from other apparatuses. For example, when the device is implemented in the form of a chip, the receiving unit is an interface circuit for the chip to receive signals from other chips or devices. The above unit for transmitting is an interface circuit of the apparatus for transmitting a signal to other apparatuses. For example, when the device is implemented in the form of a chip, the transmitting unit is an interface circuit for the chip to transmit signals to other chips or devices.

Please refer to fig. 10, which is a schematic structural diagram of a terminal according to an embodiment of the present application. It may be the terminal in the above embodiment, for implementing the operation of the terminal in the above embodiment. As shown in fig. 10, the communication apparatus includes: an antenna 1010, a radio frequency part 1020, a signal processing part 1030. The antenna 1010 is connected to the radio frequency part 1020. In the downlink direction, the rf section 1020 receives information transmitted by the network device through the antenna 1010, and transmits the information transmitted by the network device to the signal processing section 1030 for processing. In the uplink direction, the signal processing part 1030 processes the information of the communication device and sends the information to the radio frequency part 1020, and the radio frequency part 1020 processes the information of the communication device and sends the information to the network device through the antenna 1010.

The signal processing section 1030 may include a modem subsystem for implementing processing of each communication protocol layer of data; the system also comprises a central processing subsystem used for realizing the processing of a terminal operating system and an application layer; in addition, other subsystems, such as a multimedia subsystem for implementing control of a terminal camera, a screen display, etc., peripheral subsystems for implementing connection with other devices, and the like may be included. The modem subsystem may be a separately provided chip. Alternatively, the above means for the terminal may be located at the modem subsystem.

Modem subsystem may include one or more processing elements 1031, including, for example, a master CPU and other integrated circuits. The modem subsystem may also include a memory element 1032 and an interface circuit 1033. The storage element 1032 is used to store data and programs, but the programs for executing the methods executed by the terminal in the above methods may not be stored in the storage element 1032, but stored in a memory outside the modem subsystem, and the modem subsystem is loaded for use when used. The interface circuit 1033 is used to communicate with other subsystems. The above apparatus for a terminal may be located in a modem subsystem, which may be implemented by a chip comprising at least one processing element for performing the steps of any of the methods performed by the above terminal and interface circuitry for communicating with other apparatus. In one implementation, the unit of the terminal for implementing the steps of the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for the terminal includes a processing element and a storage element, and the processing element calls a program stored in the storage element to execute the method executed by the terminal in the above method embodiment. The memory elements may be memory elements with the processing elements on the same chip, i.e. on-chip memory elements.

In another implementation, the program for performing the method performed by the terminal in the above method may be a memory element on a different chip than the processing element, i.e. an off-chip memory element. At this time, the processing element calls or loads a program from the off-chip storage element onto the on-chip storage element to call and execute the method executed by the terminal in the above method embodiment.

In yet another implementation, the unit of the terminal implementing the steps of the above method may be configured as one or more processing elements disposed on the modem subsystem, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the terminal implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC) chip for implementing the above method. At least one processing element and a storage element can be integrated in the chip, and the processing element calls the stored program of the storage element to realize the method executed by the terminal; or, at least one integrated circuit may be integrated in the chip for implementing the method executed by the above terminal; alternatively, the above implementation modes may be combined, the functions of the partial units are implemented in the form of a processing element calling program, and the functions of the partial units are implemented in the form of an integrated circuit.

It will be seen that the above apparatus for a terminal may comprise at least one processing element and interface circuitry, wherein the at least one processing element is adapted to perform any of the methods performed by the terminal provided by the above method embodiments. The processing element may: namely, calling the program stored in the storage element to execute part or all of the steps executed by the terminal; it is also possible to: that is, some or all of the steps performed by the terminal are performed by integrated logic circuits of hardware in the processor element in combination with instructions; of course, some or all of the steps performed by the terminal may be performed in combination with the first and second manners.

The processing elements herein, like those described above, may be a general purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above methods, such as: one or more ASICs, or one or more microprocessors DSP, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.

The storage element may be a memory or a combination of a plurality of storage elements.

Specifically, please refer to fig. 11, where fig. 11 is a schematic structural diagram of an embodiment of a network device 1100 according to an embodiment of the present disclosure. The network device is used for executing the method executed by the network device in the method embodiment.

A receiving unit 1101 for acquiring first time information;

a receiving unit 1101, configured to receive the service data and the second time information from the first communication device;

the processing unit 1102 processes transmission of the service data according to the first time information and the second time information.

In a possible implementation manner, the receiving unit 1101 is further configured to receive a data packet from the first communication device, where the data packet includes the service data and the second time information.

In a possible implementation manner, the first time information is jitter information;

the second time information is a timestamp, where the timestamp includes a delivery time of the service data at the second communication device, or the timestamp includes a receiving time of the service data at the first communication device or a transmitting time of the service data at the first communication device.

In a possible implementation manner, the receiving unit 1101 is further configured to receive the first time information through a control plane, and receive the second time information through a user plane.

In a possible implementation manner, the receiving unit 1101, when receiving the first time information, further receives an identifier corresponding to the service data;

the processing unit 1102 is further configured to determine that the first time information is used for the service data according to the identifier.

In a possible implementation manner, the first communication device is a core network device, and the second communication device is a terminal; or, the first communication device is a terminal, and the second communication device is a core network device;

a receiving unit 1101, configured to receive the first time information sent by the core network device;

alternatively, the first and second electrodes may be,

the sending unit 1103 is further configured to receive the first time information sent by the second network device.

In one possible implementation form of the method,

the processing unit 1102 is further configured to determine a scheduling priority according to the first time information and the second time information received by the receiving unit 1101;

a sending unit, further configured to send the service data to a second communication device according to the scheduling priority determined by the processing unit 1102.

In a possible implementation manner, the processing unit 1102 is further configured to determine that the service data is overtime according to the first time information and the second time information, and abandon transmission of the service data.

In a possible implementation manner, the processing unit 1102 is further configured to record a transmission status of the service data.

In a possible implementation manner, the service corresponding to the service data is a periodic service;

a receiving unit 1101, configured to receive a transmission cycle corresponding to the service data;

the sending unit is further configured to transmit service data subsequent to the service to the second communication device according to the transmission cycle received by the receiving unit 1101.

In a possible implementation manner, the second time information is carried in a data packet of a first protocol layer, where the first protocol layer is a MAC layer, a synchronization layer, or a GTP-U layer of a gprs tunnel of a user plane, and the data packet of the first protocol layer includes the service data.

In a possible implementation manner, the second time information is carried in a data packet of a second protocol layer, where the second protocol layer is an MAC layer, a synchronization layer, a service data adaptation protocol SDAP layer, a packet data convergence protocol PDCP layer, or a radio link layer control protocol RLC layer, and the data packet of the second protocol layer includes the service data.

Referring to fig. 12, an embodiment of the present application provides a network device, which is a schematic structural diagram of the network device according to the embodiment of the present application. For implementing the operation of the network device in the above embodiments. According to different configurations, the method may also be used to implement the operation of the core network device in the above embodiments. As shown in fig. 12, the network device includes: antenna 1201, radio frequency device 1202, baseband device 1203. Antenna 1201 is connected to radio frequency device 1202. In the uplink direction, the rf device 1202 receives information transmitted by the terminal through the antenna 1201, and transmits the information transmitted by the terminal to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes the information of the terminal and sends the information to the radio frequency device 1202, and the radio frequency device 1202 processes the information of the terminal and sends the information to the terminal through the antenna 1201.

The baseband device 1203 may include one or more processing elements 12031, including, for example, a main control CPU and other integrated circuits. In addition, the baseband device 1203 may further include a storage element 12032 and an interface 12033, the storage element 12032 is used for storing programs and data; the interface 12033 is used for exchanging information with the radio frequency device 1202, and is, for example, a Common Public Radio Interface (CPRI). The above means for a network device may be located on the baseband apparatus 1203, for example, the above means for a network device may be a chip on the baseband apparatus 1203, the chip including at least one processing element and an interface circuit, wherein the processing element is used for executing various steps of any one of the methods executed by the above network device, and the interface circuit is used for communicating with other apparatuses. In one implementation, the unit of the network device for implementing the steps in the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for the network device includes a processing element and a storage element, and the processing element calls a program stored in the storage element to execute the method executed by the network device in the above method embodiment. The memory elements may be memory elements on the same chip as the processing element, i.e. on-chip memory elements, or may be memory elements on a different chip than the processing element, i.e. off-chip memory elements.

In another implementation, the unit of the network device for implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the baseband apparatus, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the network device implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC), for example, a baseband device including the SOC chip for implementing the above method. At least one processing element and a storage element can be integrated in the chip, and the method executed by the network equipment is realized in the form that the processing element calls the stored program of the storage element; or, at least one integrated circuit may be integrated in the chip, for implementing the method executed by the above network device; alternatively, the above implementation modes may be combined, the functions of the partial units are implemented in the form of a processing element calling program, and the functions of the partial units are implemented in the form of an integrated circuit.

It is seen that the above apparatus for a network device may comprise at least one processing element and interface circuitry, wherein the at least one processing element is configured to perform the method performed by any one of the network devices provided by the above method embodiments. The processing element may: namely, calling the program stored in the storage element to execute part or all of the steps executed by the network equipment; it is also possible to: that is, some or all of the steps performed by the network device are performed by integrated logic circuitry of hardware in the processor element in combination with the instructions; of course, some or all of the steps performed by the above network device may also be performed in combination with the first manner and the second manner.

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

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

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

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

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

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method of data transmission, comprising:

the first network equipment acquires first time information;

the first network equipment receives the service data and the second time information from the first communication equipment; the second time information is a timestamp, where the timestamp includes a delivery time of the service data at a second communication device, or the timestamp includes a receiving time of the service data at the second communication device or a transmitting time of the service data at the first communication device;

and the first network equipment processes the transmission of the service data according to the first time information and the second time information, wherein the transmission of the service data comprises accelerated transmission, normal transmission or delayed transmission.

2. The method of claim 1, wherein the first network device receives traffic data and second time information, comprising:

the first network device receives a data packet from the first communication device, the data packet including the traffic data and the second time information.

3. A method according to claim 1 or 2, characterized in that said first time information is dithered information.

4. The method of claim 1, wherein the first network device receives the first time information through a control plane and receives the second time information through a user plane.

5. The method according to claim 4, wherein when receiving the first time information, further receiving an identifier corresponding to the service data;

and the first network equipment determines that the first time information is used for the service data according to the identification.

6. The method of claim 1, wherein the first communication device is a core network device and the second communication device is a terminal; or, the acquiring the first time information includes:

the first network equipment receives the first time information sent by the core network equipment;

alternatively, the first and second electrodes may be,

and the first network equipment receives the first time information sent by the second network equipment.

7. The method of claim 1, wherein processing the transmission of the traffic data according to the first time information and the second time information comprises:

the first network equipment determines a scheduling priority according to the first time information and the second time information;

and the first network equipment sends the service data to second communication equipment according to the scheduling priority.

8. The method of claim 1, wherein the first network device processes the transmission of the traffic data according to the first time information and the second time information, comprising:

and the first network equipment determines that the service data is overtime according to the first time information and the second time information, and abandons the transmission of the service data.

9. The method of claim 8, further comprising:

and the first network equipment records the transmission state of the service data.

10. The method of claim 9, wherein the transmission status comprises a timeout or a transmission failure.

11. The method according to claim 1, wherein the service corresponding to the service data is a periodic service, and the method further comprises:

the first network equipment acquires a transmission cycle corresponding to the service data;

and the first network equipment transmits the subsequent service data of the service to the second communication equipment according to the transmission cycle.

12. The method of claim 1,

the second time information is carried in a data packet of a first protocol layer, the first protocol layer is a Medium Access Control (MAC) layer, a synchronization layer, or a general packet radio service tunnel (GTP-U) layer of a user plane, and the data packet of the first protocol layer includes the service data.

13. The method of claim 1,

the second time information is carried in a data packet of a second protocol layer, the second protocol layer is a Media Access Control (MAC) layer, a synchronization layer, a Service Data Adaptation Protocol (SDAP) layer, a Packet Data Convergence Protocol (PDCP) layer or a radio link layer (RLC) layer, and the data packet of the second protocol layer comprises the service data.

14. A method of data transmission, comprising:

the method comprises the steps that communication equipment receives first time information, service data and second time information, wherein the first time information and the second time information are used for determining a delivery time window of the service data at the communication equipment, the second time information is a timestamp, the timestamp comprises the delivery time of the service data at the communication equipment, and the delivery time comprises a reference delivery time or a suggested delivery time; the suggested delivery time is a time for suggesting delivery of data to the communication device, and the reference delivery time is a time for reference when the communication device delivers data;

the communication equipment determines a delivery time window according to the first time information and the second time information;

and the communication equipment processes the submission of the service data according to the submission time window.

15. The method of claim 14, wherein the communication device receives the first time information, the traffic data, and the second time information, comprising:

the communication equipment receives first time information from network equipment through a control plane;

and the communication equipment receives a data packet from the network equipment through a user plane, wherein the data packet comprises the service data and the second time information.

16. The method according to claim 14 or 15, characterized in that the method further comprises:

when the communication equipment receives the first time information, the communication equipment also receives an identifier corresponding to the service data;

and the communication equipment determines that the first time information is used for the service data according to the identification.

17. The method of claim 16, wherein the identification comprises a flow identification, a logical channel identification, or a radio bearer identification.

18. The method of claim 14, wherein the first time information is jitter information.

19. The method of claim 14, wherein the communication device processes the delivery of the traffic data according to the delivery time window, comprising:

and submitting the service data to a target node or a target protocol layer in the submission time window.

20. The method of claim 19, wherein when the communication device receives the traffic data before the delivery time window, the method further comprises:

the communication device caches the service data.

21. The method of claim 14, wherein the communication device processes the delivery of the traffic data according to the delivery time window, comprising:

and the communication equipment abandons the delivery of the service data when receiving the service data after the delivery time window.

22. The method of claim 21, further comprising:

and the communication equipment records the transmission state of the service data.

23. The method of claim 22, further comprising:

and the communication equipment sends indication information to network equipment, wherein the indication information is used for indicating the transmission state of the service data.

24. The method according to claim 22 or 23, wherein the transmission status comprises a timeout or a transmission failure.

25. A network device comprising means for performing the steps of the method according to any one of claims 1-13.

26. A network device, comprising:

at least one processor configured to perform the method of any one of claims 1-13, and interface circuitry.

27. A computer-readable storage medium, comprising a program which, when executed by a processor, is adapted to carry out the method of any one of claims 1-13.

28. A communication device comprising means for performing the steps of the method of any one of claims 14-24.

29. A communication device, comprising:

at least one processor configured to perform the method of any one of claims 14-24 and interface circuitry.

30. A terminal, characterized in that it comprises a communication device according to claim 28 or 29.

31. A computer-readable storage medium, comprising a program which, when executed by a processor, is adapted to carry out the method of any one of claims 14-24.