WO2020211549A1

WO2020211549A1 - Method and apparatus for transmitting data

Info

Publication number: WO2020211549A1
Application number: PCT/CN2020/077382
Authority: WO
Inventors: 王峰; 陈雨辰; 汪凡
Original assignee: 华为技术有限公司
Priority date: 2019-04-15
Filing date: 2020-03-02
Publication date: 2020-10-22
Also published as: CN111835657A

Abstract

Provided in the present application are a method and an apparatus for transmitting data. The method comprises: on the basis of the data type of a first SDU, determining a target serial number set, the target serial number set being a first serial number set or a second serial number set, and the transmission priority of PDU obtained on the basis of a serial number in the first serial number set being higher than the transmission priority of PDU obtained on the basis of a serial number in the second serial number set; determining a first serial number of the first SDU in the target serial number set; and sending a first protocol data unit PDU, the first PDU being a PDU obtained by packaging the first SDU on the basis of the first serial number, thus facilitating the reduction of latency to meet real-time demands to a certain extent. Exemplarily, the present method can be used in a video surveillance scenario.

Description

Method and device for transmitting data

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 15, 2019, with the application number 201910297232.0 and the application name "Method and Device for Data Transmission", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the communication field, and more specifically, to a method and device for transmitting data in the communication field.

Background technique

In recent years, with the rapid development of computer networks and image processing technologies, video surveillance has been widely used in various scenarios, including traffic analysis, medical care, public safety, wildlife tracking, and environmental monitoring. Video surveillance systems are divided into wired video surveillance systems and wireless video surveillance systems. Compared with wired video surveillance systems, wireless video surveillance systems have the advantages of low cost, wide application range, good scalability, and high mobility.

Summary of the invention

The present application provides a method and device for transmitting data, which can meet the real-time requirements of data and help improve the performance of the system.

In a first aspect, a method for transmitting data is provided, which includes: determining a target sequence number set according to the data type of the first SDU, where the target sequence number set is the first sequence number set or the second sequence number set, and according to the first SDU The transmission priority of the PDU obtained by the sequence number in a sequence number set is higher than the transmission priority of the PDU obtained according to the sequence number in the second sequence number set; the first sequence number of the first SDU is determined in the target sequence number set ; Send the first protocol data unit PDU, the first PDU is the PDU obtained by encapsulating the first SDU according to the first sequence number.

Therefore, the method for transmitting data provided by the embodiment of the present application can determine the first serial number set or the second serial number set as the target serial number set according to the data type of the first SDU, and according to the sequences in the two serial number sets There is a priority order for the PDUs obtained by the number, which can ensure that the PDUs obtained according to the sequence numbers in the first sequence number set are sent first, which helps to reduce the time delay, so as to meet the real-time requirements to a certain extent.

In some possible implementations, determining the target sequence number set according to the data type of the first SDU includes: if the first SDU is the first type of data, the target sequence set is the first sequence number set; if the first SDU is the first SDU For the second type of data, the target sequence set is the second sequence number set.

Optionally, the delay requirement of the first type of data is higher than that of the second type of data. In this way, the first type of data can be sent first, thereby helping to reduce the delay of the first type of data.

In some possible implementations, the first type of data is real-time data, and the second type of data is stored data.

In the video field, real-time data has a high latency requirement, but stored data has no latency requirement, so that real-time data can be transmitted first.

In some possible implementations, the first serial number set is [0,...,N-1], the second serial number set is [N,...,M-1], M and N are positive integers, and M is greater than N.

Optionally, N is

or

M is 2 ^pdcp-SN-Size , where,

For the rounding down operation,

For the above rounding operation, pdcp-SN-Size is a positive integer, for example, the value of pdcp-SN-Size can be 12 or 18.

In some possible implementations, the first sequence number set is [0,...,P-1], the second sequence number set is [0,...,Q-1], and P and Q are positive integers.

In some possible implementation manners, the header of the first PDU includes first indication information, and the first indication information is used to indicate the sequence number set to which the first sequence number belongs, or used to indicate the data type of the first PDU.

In this way, the receiving end can determine the sequence number set to which the first sequence number belongs according to the first indication information.

In some possible implementation manners, the method further includes: determining the data type of the first SDU according to the transport layer protocol type of the first SDU.

In some possible implementation manners, determining the data type of the first SDU according to the transport layer protocol type of the first SDU includes: if the transport layer protocol type of the first SDU is the UDP protocol, the first SDU is the first type data; If the transport layer protocol type of the first SDU is not the UDP protocol, the data type of the first SDU is determined according to the destination port number of the transport layer of the first SDU.

In some possible implementations, determining the data type of the first SDU according to the destination port number of the transport layer of the first SDU includes: if the destination port number of the transport layer is 554, the first SDU is the first data type; if If the destination port number of the transport layer is not 554, the first SDU is the second data type.

In this way, the receiving end can determine the sequence number set to which the first sequence number belongs according to the transport layer protocol type, and there is no need to notify the information through additional signaling, so signaling overhead can be reduced.

In a second aspect, a method for transmitting data is provided, including: receiving a first protocol data unit PDU and a second PDU; according to the sequence number set to which the first sequence number of the first PDU belongs and the second sequence number of the second PDU The set of sequence numbers to which it belongs, transmits the first service data unit SDU corresponding to the first PDU and the second SDU corresponding to the second PDU to the higher layer.

Therefore, in the method for transmitting data provided by the embodiments of this application, the receiving end determines the order of delivering the SDUs corresponding to the two PDUs to the upper layer according to the sequence number set to which the sequence numbers of the two PDUs belong, and can give priority to the higher priority PDUs. , So as to meet the real-time requirements to a certain extent.

In some possible implementations, according to the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs, the first service data unit corresponding to the first PDU is delivered to the higher layer. The SDU and the second SDU corresponding to the second PDU include:

The sequence number set to which the first sequence number belongs is the same as the sequence number set to which the second sequence number belongs. According to the size of the first sequence number and the second sequence number, the first service data unit SDU and the first service data unit corresponding to the first PDU and the The second SDU corresponding to the two PDUs.

In some possible implementations, according to the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs, the first service data unit corresponding to the first PDU is delivered to the higher layer. The second SDU corresponding to the SDU and the second PDU includes: if the first sequence number belongs to the first sequence number set, and the second sequence number belongs to the second sequence number set, the second SDU corresponding to the second PDU is given priority The first service data unit SDU corresponding to a PDU is delivered to the upper layer.

In some possible implementations, the header of the first PDU includes first indication information, which is used to indicate the sequence number set to which the first sequence number belongs; the header of the second PDU includes second indication information, and the second indication The information is used to indicate the sequence number set of the second sequence number.

In this way, the receiving end determines whether the first sequence number and the second sequence number belong to the same sequence number set according to the first indication information and the second indication information.

In the third aspect, this application provides a data transmission device for implementing the method in the first aspect and/or any possible implementation manners thereof. The device may be a terminal device (or a network device), a device in a terminal device (or a network device), or a device that can be matched and used with the terminal device (or network device). In one design, the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the first aspect and/or any possible implementation manners thereof. The modules may be hardware circuits or software , It can also be realized by hardware circuit combined with software. In one design, the device may include a processing unit and a transceiver unit.

In a fourth aspect, this application provides a data transmission device for implementing the method in the second aspect and/or any possible implementation manners thereof. The device may be a terminal device (or a network device), a device in a terminal device (or a network device), or a device that can be matched and used with the terminal device (or network device). In one design, the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the second aspect and/or any possible implementations thereof. The module may be a hardware circuit or a software , It can also be realized by hardware circuit combined with software. In one design, the device may include a processing unit and a transfer unit.

In a fifth aspect, the present application provides a data transmission device. The device includes a processor for implementing the method described in the first aspect and/or any possible implementation manners thereof. The apparatus may further include a memory, the memory is coupled with the processor, and the processor is configured to implement the method described in the first aspect and/or any possible implementation manner thereof. Optionally, the processor is configured to store instructions, and when the processor executes the instructions stored in the memory, the method described in the first aspect and/or any possible implementation manner thereof can be implemented. The device may further include a communication interface for communicating with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other types of communication interfaces.

In a sixth aspect, the present application provides a data transmission device. The device includes a processor, configured to implement the method described in the second aspect and/or any possible implementation manners thereof. The apparatus may further include a memory, the memory is coupled with the processor, and the processor is configured to implement the method described in the second aspect and/or any possible implementation manner thereof. Optionally, the processor is configured to store instructions, and when the processor executes the instructions stored in the memory, the method described in the second aspect and/or any possible implementation manner thereof can be implemented. The device may also include a communication interface, which is used for the device to communicate with other devices.

In a seventh aspect, this application provides a system for transmitting data, the system including the device provided in the third aspect and the device provided in the fourth aspect; or

The system includes the device provided by the fifth aspect and the device provided by the sixth aspect;

In an eighth aspect, this application provides a computer-readable storage medium in which computer instructions are stored. When the computer instructions are run on the computer, the computer can execute the methods in the first aspect and any possible designs. .

In the ninth aspect, the present application provides a computer-readable storage medium in which computer instructions are stored. When the computer instructions are executed on the computer, the computer executes the method in the second aspect and any possible designs thereof .

In a tenth aspect, this application provides a chip including a processor. The processor is used to execute the method in the first aspect and any possible implementation manners thereof.

Optionally, the chip further includes a memory, and the memory is coupled with the processor.

Further optionally, the chip further includes a communication interface.

In an eleventh aspect, this application provides a chip including a processor. The processor is used to execute the method in the second aspect and any possible implementation manners thereof.

Further optionally, the chip further includes a communication interface.

In the twelfth aspect, the present application provides a computer program product, the computer program product includes computer program code, when the computer program code runs on a computer, the computer executes the first aspect and any of its possible designs method.

In a thirteenth aspect, the present application provides a computer program product, the computer program product includes computer program code, when the computer program code runs on a computer, the computer executes the second aspect and any possible implementation manners thereof Methods.

Description of the drawings

FIG. 1 is a schematic diagram of a communication scenario provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an air interface protocol stack provided by an embodiment of the present application;

3 to 5 are schematic diagrams of data transmission methods provided by embodiments of the present application;

Fig. 6 is a schematic diagram of the COUNT value provided by an embodiment of the present application;

7 to 9 are schematic diagrams of simulation results of the method for transmitting data provided by the embodiment of the present application relative to the prior art according to the embodiment of the present application;

10 to 12 are schematic block diagrams of data transmission apparatuses provided by embodiments of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) System or New Radio (NR), etc.

Fig. 1 shows a schematic diagram of a communication scenario provided by an embodiment of the present application. As shown in FIG. 1, a terminal device 110 accesses a wireless network through an access network device 120 to obtain services from an external network (for example, the Internet) through the wireless network, or communicate with other terminal devices through the wireless network.

The terminal device 110 may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminals in the future evolution of public land mobile network (PLMN) Devices, etc., are not limited in the embodiments of the present application.

The network device 120 may be an access network device used to communicate with terminal devices. The access network device may be a base transceiver station (BTS) in a GSM system or a CDMA system, or a base station node B in a WCDMA system. (NodeB, NB), it can also be an evolved NodeB (evoled NodeB, eNB or eNodeB) in the LTE system, and it can also be a radio control in a cloud radio access network (cloud radio access network, CRAN) scenario Device. Or the network device 120 may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network or a network device in a future evolved PLMN network, etc., which is not limited in the embodiment of the present application.

In this application, the terminal device 110 may be the sending end or the receiving end, and the network device 120 may be the sending end or the receiving end. Exemplarily, the sending end is the terminal device 110 and the receiving end is the network device 120; or, the sending end is the network device 120 and the receiving end is the terminal device 110. Of course, the embodiment of the present application is not limited to this, the sending end may be a terminal device, and the receiving end may be another terminal device.

In addition, in the embodiments of the present application, the numbers "first", "second", etc. are only used to distinguish different objects. For example, in order to distinguish different data units, it should not constitute any limitation on the protection scope of the embodiments of the present application. "Multiple" means two or more.

Fig. 2 shows a schematic structural diagram of an air interface protocol stack provided by an embodiment of the present application. As shown in Figure 2, the air interface protocol stacks of the control plane and the user plane include, but are not limited to, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the media access control ( media access control, MAC) layer and physical (physical, PHY) layer. For the control plane, it also includes a radio resource control (Radio Resource Control, RRC) layer. The PDCP layer is the RRC layer above the control plane, and the network layer above the user plane, such as IP. The lower layer of the PDCP layer is the RLC layer. The PDCP layer can process RRC messages on the control plane and data units on the user plane, such as IP packets. The PDCP layer can perform IP header compression to reduce the number of bits transmitted on the wireless interface. The PDCP layer can also be responsible for encryption of the control plane and integrity protection of transmitted data. At the receiving end, the PDCP protocol layer performs corresponding decryption and decompression operations. One PDCP entity can be configured for each radio bearer. The RCL layer is responsible for segmentation/cascading, retransmission control, and repetition detection. The RLC layer provides services for the PDCP layer and can configure an RLC entity for each radio bearer. The MAC layer controls the multiplexing of logical channels, the retransmission of hybrid automatic repeat requests, and the scheduling of uplink and downlink. The MAC layer provides services for the RLC layer in the form of logical channels. The PHY layer loads management encoding/decoding, modulation/demodulation, multi-antenna mapping, and other types of physical layer functions. The PHY layer provides services for the MAC layer in the form of transmission channels.

The PDCP layer, RLC layer and MAC layer have corresponding PDUs and SDUs. PDU is the data unit sent to the lower layer; SDU is the data unit received from the upper layer. The embodiments of the present application are directed to the transmission of the PDCP layer. For the transmission of other layers, reference may be made to the description of the UMTS system, the LTE system, the NR system, the WiMAX system, or other systems, and will not be described in detail here to avoid repetition.

Optionally, a sequence number (SN) may be used to sort the data units. The sequence number is used to indicate the sequence of the next data unit to be received or sent in the service flow, and the sequence number may also be called a number. When the data unit is at the PDCP layer, the PDCP SN is encapsulated in the packet header of the PDCP PDU.

In the network, data is carried on the air interface for transmission by default, and different internet protocol (IP) data units enter the PDCP layer in the order of arrival, and are delivered in order at the PDCP layer. For example, after the sender receives the service data unit (SDU) from the upper layer at the PDCP layer, it will associate an SN, and the serial number can be encapsulated in the packet header of the PDCP protocol data unit (PDU) . When the receiving end receives the PDCP PDU delivered by the lower layer at the PDCP layer, it reads the sequence number of the PDCP PDU header, reorders the sequence number and delivers it to the upper layer. The sender associates an SN to each data unit in the order of arrival at the PDCP layer, encapsulates the SN in the header of the PDU, and then delivers the corresponding PDU to the lower layer in the order of arrival of the SDU. Different types of data units may have different delay requirements. It is possible that some types of data units have high delay requirements (the value of delay requirements is small, such as 0.5 ms, 10 ms, 50 ms, etc.), and some types of data The delay requirement of the unit is low (the value of the delay requirement is relatively large, such as 100 milliseconds, 400 milliseconds, 1 second, etc.). In a possible scenario, for a PDCP entity, the first data with high latency requirements arrives at the PDCP layer after the second data with low latency requirements. According to the above method, the second data will be delivered to the lower layer first. , The first data will be delivered after the second data, which will affect the real-time performance of the first data, which may result in poor system performance.

In wireless video surveillance systems, video types can be divided into real-time data and stored data according to their functions. Real-time data refers to video data with real-time requirements, such as real-time playback on mobile phones, personal computers and large screens. The stored data has no real-time requirements (or, with lower latency requirements), and is used for archived video data. Because of the need for forensics, storage data has higher requirements for reliability. In many video surveillance systems, the cameras upload real-time data and store data at the same time for screen projection and archiving. For a PDCP entity, it is possible that the real-time data arrives at the PDCP layer after storing the data, so that the stored data will be delivered to the lower layer first, and the real-time data will be delivered after the stored data. This will affect the real-time performance of the real-time data and cannot meet the requirements. The delay requirement of real-time data may result in poor system performance. Furthermore, if the channel encounters interference or fluctuations, the real-time data will not meet the real-time requirements, which will affect the system performance.

Therefore, in this embodiment of the present application, for one PDCP entity, different sequence number sets can be determined for two different types of data, and data with high real-time requirements can be sent preferentially, which can meet the real-time requirements to a certain extent. When the method provided for the embodiment of the present application involves multiple PDCP entities, the method provided by the embodiment of the present application may be applied to each PDCP entity.

The method for transmitting data in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 3 shows a data transmission method 200 provided by an embodiment of the present application. The method 200 may be applied to the communication system 100 shown in FIG. 1, and the method 200 may be executed by the sending end.

S210: Determine a target sequence number set according to the data type of the first SDU, where the target sequence number set is the first sequence number set or the second sequence number set, and the transmission priority of the PDU is obtained according to the sequence numbers in the first sequence number set It is higher than the transmission priority of the PDU obtained according to the sequence number in the second sequence number set.

Optionally, the method 200 includes: if the first SDU is the first type of data, the target sequence set is the first sequence number set; if the first SDU is the second type of data, the target sequence set is the second sequence number set.

S220: Determine the first sequence number of the first SDU in the target sequence number set.

S230: Send a first protocol data unit PDU, where the first PDU is a PDU obtained by encapsulating the first SDU according to the first sequence number.

Optionally, the method 200 further includes: determining a target sequence number set according to the type of the second SDU, determining the second sequence number of the second SDU in the target sequence number set, and sending the second PDU, the second PDU being based on the second PDU obtained by encapsulating the second SDU with the sequence number.

If the first PDU and the second PDU exist at the same time, the sending order of the first PDU and the second PDU is discussed in the following situations:

If the data type of the first PDU is the first data type and the data type of the second PDU is the second data type, the first PDU is sent first, and then the second PDU; or the first PDU and the second PDU are sent at the same time.

If the data type of the second PDU is the first data type and the data type of the first PDU is the second data type, the second PDU is sent first, and then the first PDU; or the first PDU and the second PDU are sent at the same time.

If the data type of the second PDU is the same as the data type of the first PDU, the first PDU and the second PDU are sent according to the arrival sequence of the first SDU and the second SDU; or the first PDU and the second PDU are sent at the same time. Exemplarily, if the first SDU reaches the PDCP layer first, and the second SDU reaches the PDCP layer after the first SDU, the first PDU is sent first and then the second PDU; if the second SDU reaches the PDCP layer first, the first SDU is After the second SDU reaches the PDCP layer, the second PDU is sent first and then the first PDU is sent.

If there are both the first PDU and the second PDU at the transmitting end, as shown in FIG. 4, the receiving end executes method 300:

S310: Receive the first PDU and the second PDU from the sending end.

S320: According to the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs, transfer the first service data unit SDU corresponding to the first PDU and the second PDU corresponding to the higher layer. The second SDU.

Specifically, S320 can be discussed in three situations:

Case 1: If the sequence number set to which the first sequence number belongs is the same as the sequence number set to which the second sequence number belongs, the first service data unit SDU corresponding to the first PDU is delivered to the higher layer according to the first sequence number and the second sequence number The second SDU corresponding to the second PDU. For example, the first count value may be determined according to the first sequence number, the second count value may be determined according to the second sequence number, and the first SDU and the first SDU corresponding to the first PDU and For the second SDU corresponding to the second PDU, if the first count value is less than the second count value, the first SDU is first delivered to the higher layer, then the second SDU, or the first SDU and the second SDU are delivered at the same time; if the first count If the value is greater than the second count value, the second SDU is delivered to the higher layer first, and then the first SDU, or the first SDU and the second SDU are delivered at the same time.

Case 2: If the first sequence number belongs to the first sequence number set and the second sequence number belongs to the second sequence number set, the receiving end transmits the first SDU and the second SDU to the upper layer at the PDCP layer at the same time; or corresponding to the second PDU The second SDU first delivers the first service data unit SDU corresponding to the first PDU to the higher layer.

Case 3: If the first sequence number belongs to the second sequence number set and the second sequence number belongs to the first sequence number set, the receiving end transmits the first SDU and the second SDU to the upper layer at the PDCP layer at the same time; or corresponding to the first PDU For the first SDU, the second SDU corresponding to the second PDU is first delivered to the higher layer.

Therefore, in the method for transmitting data provided by the embodiments of the present application, the sending end can determine the first sequence number set or the second sequence number set as the target sequence number set according to the data type of the first SDU, and according to the two sequence number sets The PDU obtained by the sequence number in the sequence number has a priority order, which can ensure that the PDU obtained according to the sequence number in the first sequence number set is sent first, which helps to reduce the delay. The receiving end determines the order of delivering the SDUs corresponding to the two PDUs to the upper layer according to the sequence number set to which the sequence numbers of the two PDUs belong, and can give priority to the higher priority PDUs to meet the real-time requirements to a certain extent.

It should be noted that the embodiments of the present application only take the first type of data and the second type of data as examples for description. Optionally, the first type of data can be real-time data, and the second type of data can be stored data. In this way, the serial number of the real-time data can be determined in the first serial number set, and the storage data can be determined in the second serial number set. Serial number, and priority to send real-time data, so as to help meet the real-time requirements of real-time data. However, the embodiments of the present application are not limited to this. The first type of data may be data with a delay requirement, and the second type of data may be data without a delay requirement. Optionally, the first type of data may be data with high latency requirements, and the second type of data may be data with relatively low latency requirements. For example, the latency requirement of the first type data is the first latency requirement, and the second type data The delay requirement for type data is the second delay requirement, and the first delay requirement is higher than the second delay requirement.

The above briefly describes the data transmission method of the embodiment of the present application, and the following describes the data transmission method of the embodiment of the present application in combination with the interaction between different layers.

The sending end receives the first SDU sent by the second layer at the first layer, the sending end determines the target sequence number set in the first layer according to the data type of the SDU, and determines the first sequence number of the first SDU in the target sequence number set, and The first PDU obtained by encapsulating the first SDU with the first sequence number is sent to the receiving end.

It should be noted that the second layer is the upper layer of the first layer, and the second layer can also be referred to as the upper layer. For example, the first layer is the PDCP layer, and the second layer is the network layer; for another example, the first layer is the PDCP layer, The second layer is the RRC layer. Of course, the first layer and the second layer may also be layers in a future network system, which is not limited in the embodiment of the present application.

It should also be noted that the PDU and SDU in the embodiment of the present application are just names of data, and should not cause any limitation to the embodiment of the present application due to the PDU and SDU. For example, the SDU may be data from the second layer, and the PDU may be data obtained after the first layer encapsulates the second layer data. The first layer is different from the second layer, so SDU and PDU have different meanings. For the convenience of description, the embodiments of this application only take the second layer as the network layer and the first layer as the PDCP layer as an example for description.

The method 400 for transmitting data in the embodiment of the present application is described below with reference to FIG. 5. In the method 400, the second layer is the network layer, the first layer is the PDCP layer, the first type of data is real-time data, and the second type of data is stored data. Examples are described. The method 400 is executed by the sending end and the receiving end. The sending end may be the aforementioned terminal device 110, and the receiving end may be the aforementioned network device 120, or the sending end may be the aforementioned network device 120, and the receiving end may be the aforementioned terminal device 110. Method 400 includes:

S401: The transmitting end receives the first SDU delivered by the network layer at the PDCP layer.

S402: The sending end determines whether the first SDU is real-time data, if it is real-time data, execute S403, and if it is stored data, execute S404. Only perform one of S403 and S404.

Optionally, the sending end determines the data type of the first SDU according to the transport layer protocol type of the first SDU.

Specifically, the sending end determines whether the first SDU is real-time data or stored data in the following manner:

First, the sending end determines the protocol type of the transport layer of the first SDU, and determines whether the first SDU is real-time data according to the protocol type of the transport layer. Because under normal circumstances, data is generally transmitted using the A+B protocol, it means that the A protocol is used for transmission at the application layer, and the B protocol is used for transmission at the transport layer. More specifically, in the video surveillance system, real-time transport protocol (RTP) + user datagram protocol (UDP) is used to transmit real-time data on the user plane, which represents the real-time data on the user plane. The transmission layer adopts the UDP protocol, and the application layer adopts the RTP protocol; the real-time data of the control plane adopts the real-time streaming protocol (RTSP) + transmission control protocol (transmission control protocol, TCP) transmission, which means the control plane The transport layer of real-time data uses TCP, and the application layer uses RTSP; storage streams (including control-plane storage streams and user-plane storage streams) use hypertext transfer protocol (HTTP)/file transfer protocol (file transfer) protocol, FTP)+TCP transmission. Therefore, it can be judged whether the protocol type of the transport layer of the first SDU is UDP. If the protocol type of the transport layer of the first SDU is UDP, then according to the RTP+UDP transmission used for the real-time data of the user plane described above, the first SDU can be determined. One SDU is real-time data. That is, if the transport layer protocol type of the first SDU is the UDP protocol, the first SDU is the first type of data.

Second, if the protocol type of the transmission of the first SDU is not the UDP protocol, for example, the protocol of the transport layer is the TCP protocol, it may not be possible to determine whether the first SDU is storing data or real-time data of the control plane. Since there is a correspondence between the destination port number of the transport layer and the protocol of the application layer, it is possible to determine whether the first SDU is real-time data according to the destination port number of the transport layer of the first SDU. For example, if the destination port number of the transport layer of the first SDU is the first value (for example, 554), indicating that the application layer uses the RTSP protocol, the sender can determine that the first SDU is real-time data. If the destination port number of the transport layer is not When the first value or the destination port number of the transport layer is the second value, for example, when the port number is 80, 8080, or 3128, it means that the application layer uses HTTP, or when the port number is 20, 21, 22, or 23, etc. It means that the application layer adopts the FTP protocol, and the application layer adopts the HTTP protocol or the FTP protocol, then the first SDU can be determined to be the storage data.

S403: If the first SDU is real-time data, the sending end determines the first sequence number associated with the first SDU in the first sequence number set.

S404: If the first SDU is stored data, the sending end determines the first sequence number associated with the first SDU in the second sequence number set.

Wherein, the transmission priority of the PDU obtained according to the sequence number in the first sequence number set is higher than the transmission priority of the PDU obtained according to the sequence number in the second sequence number set.

S405: The sending end encapsulates the first SDU according to the first sequence number to generate a first PDU.

S406: The sending end sends the first PDU to the receiving end, and the receiving end receives the first PDU.

It should be noted that S406 may also include the execution process of the RLC layer, MAC layer, and PHY layer of the sender and receiver. Since the embodiment of this application does not involve the RLC layer, MAC layer, and PHY layer, these execution processes are here. Do not describe in detail.

The method 400 further includes: the transmitting end receives the second SDU sent by the network layer at the PDCP layer, and performs 401-S405 on the second SDU once to obtain the second PDU, and performs S407 to send the second PDU corresponding to the second SDU to the receiver The end sends, the receiving end receives the second PDU.

It should be noted that at the PDCP layer of the transmitting end, the first SDU can reach the PDCP layer first, and the second SDU can reach the PDCP layer after the first SDU; or the second SDU can reach the PDCP layer first, and the first SDU is after the second SDU. Reach the PDCP layer; or the first SDU and the second SDU reach the PDCP layer at the same time.

It should be noted that at the PDCP layer of the receiving end, the first PDU can reach the PDCP layer first, and the second PDU can reach the PDCP layer after the first PDU; or the second PDU can reach the PDCP layer first, and the first PDU is after the second PDU. Reach the PDCP layer; or the first PDU and the second PDU reach the PDCP layer at the same time.

S408: The receiving end decapsulates the first PDU to obtain a first SDU, and decapsulates the second PDU to obtain a second SDU.

S409: The receiving end determines the first sequence number associated with the first PDU and the second sequence number associated with the second PDU.

S410: The receiving end determines whether the first sequence number and the second sequence number belong to the same sequence number set, or determines the sequence number set to which the first sequence number and the second sequence number belong.

Optionally, both the first serial number and the second serial number belong to the first serial number set; or both the first serial number and the second serial number belong to the second serial number set; or the first serial number belongs to the first serial number set , The second serial number belongs to the second serial number set, or the first serial number belongs to the second serial number set, and the second serial number belongs to the first serial number set.

Optionally, the method 400 includes: for a PDU, the header of the PDU includes indication information, and the indication information is used to indicate the sequence number set to which the sequence number of the PDU belongs. For example, the header of the first PDU includes first indication information, the first indication information is used to indicate the sequence number set to which the first sequence number belongs; the header of the second PDU includes second indication information, and the second indication information is used to indicate the second The serial number collection of serial numbers. The method 400 also includes:

The receiving end determines whether the first sequence number and the second sequence number belong to the same sequence number set according to the first indication information and the second indication information, or determines the sequence number set to which the first sequence number belongs and the sequence number to which the second sequence number belongs set.

Further, if the first indication information indicates that the first sequence number belongs to the first sequence number set, and the second indication information indicates that the second sequence number belongs to the first sequence number set, the transmitting end can determine the first sequence number and the first sequence number at the PDCP layer. The second sequence number belongs to the first sequence number set; if the first indication information indicates that the first sequence number belongs to the second sequence number set, and the second indication information indicates that the second sequence number belongs to the second sequence number set, the transmitting end can be in the PDCP layer It is determined that the first serial number and the second serial number belong to the second serial number set; if the first indication information indicates that the first serial number belongs to the first serial number set, the second indication information indicates that the second serial number belongs to the second serial number set, Then the transmitting end can determine at the PDCP layer that the first sequence number and the second sequence number do not belong to the same sequence number set. If the first indication information indicates that the first sequence number belongs to the second sequence number set, and the second indication information indicates that the second sequence number belongs to the first sequence number set, the sender can determine the first sequence number and the second sequence number at the PDCP layer Does not belong to the same serial number set.

Optionally, the method 400 includes: for a PDU, the header of the PDU includes indication information, and the indication information is used to indicate the data type of the PDU. For example, the first indication information is used to indicate the data type of the first PDU, and the second indication information is used to indicate the data type of the second PDU. PDUs of different data types need to determine the sequence numbers in their respective sequence number sets. If the data type of the first PDU indicated by the first indication information is the first data type, the receiving end can determine that the first sequence number of the first PDU belongs to The first sequence number set, if the second indication information indicates that the data type of the second PDU is the second data type, the receiving end may determine that the second sequence number of the second PDU belongs to the second sequence number set. If the data type of the first PDU indicated by the first indication information is the first data type, and the second indication information indicates that the data type of the second PDU is the first data type, the receiving end can determine the first sequence number and the first sequence number of the first PDU. The second sequence numbers of the second PDU all belong to the first sequence number set; if the data type of the first PDU indicated by the first indication information is the second data type, the second indication information indicates that the data type of the second PDU is the second data Type, the receiving end can determine that both the first sequence number of the first PDU and the second sequence number of the second PDU belong to the second sequence number set. If the data type of the first PDU indicated by the first indication information is the second data type, the receiving end can determine that the first sequence number of the first PDU belongs to the second sequence number set, and if the second indication information indicates the data of the second PDU If the type is the first data type, the receiving end can determine that the second sequence numbers of the second PDU all belong to the first sequence number set.

It should be noted that the above-mentioned first indication information and second indication information are used to indicate the sequence number set to which the sequence number of the PDU belongs. It can directly indicate the sequence number set to which the sequence number belongs or indirectly indicate the sequence number set. As for the first The names of the instruction information and the second instruction information are not limited in the embodiment of this application.

S411: The receiving end transmits the first SDU and the second SDU to the upper layer according to the result in S410 at the PDCP layer.

S411 can be discussed in two situations:

Case 1: In S410, if the determined first sequence number and the second sequence number belong to the same sequence number set, the first SDU and the second SDU are transferred to the upper layer according to the first sequence number and the second sequence number.

For example, the receiving end may set independent count values for the first type of data and the second type of data. In the PDCP layer, the receiving end can determine the first count (COUNT) value associated with the first SDU according to the first sequence number, determine the second count value associated with the second SDU according to the second sequence number, and according to the first count value and the second count The value relationship transfers the first SDU and the second SDU to the upper layer; specifically, if the first count value is greater than the second count value, the second SDU is first transferred to the upper layer, and then the first SDU is transferred, or the second SDU is transferred to the upper layer at the same time. An SDU and a second SDU; if the second count value is greater than the first count value, the first SDU is first delivered to the upper layer, and then the second SDU is delivered, or the first SDU and the second SDU are delivered to the upper layer at the same time.

The following uses an example to describe how to determine the count value based on the serial number. As shown in Figure 6, the total length of the COUNT value (count value) is H bits, and H is a positive integer. The H bits are composed of the high-order hyperframe number (HFN) and the low-order PDCP SN. Among them, the sender The transmitted PDU includes the low-order PDCP SN, and the high-order HFN is maintained by the receiving end. The length of PDCP SN is configured by the upper layer as pdcp-SN-Size bits, and the length of HFN is H-pdcp-SN-Size bits. For example, if H is 32 and pdcp-SN-Size is 12 or 18, the length of HFN is 20 bits or 14 bits.

Suppose the form of the first serial number set or the second serial number set is [A, B-1], A is the smallest element of the serial number set, B-1 is the largest element of the serial number set, and A is greater than or equal to 0 Integer, B is an integer greater than 0. Window_Size represents the size of the PDCP layer reordering window, Window_Size is a positive integer; RX_DELIV represents the COUNT of the first lost PDU in the reordering window. Let a=SN(RX_DELIV), b=SN(RX_DELIV)+window_size-1. SN (RX_DELIV) represents the SN corresponding to RX_DELIV, that is, the value of the last pdcp-SN-Size bit of RX_DELIV is SN, and HFN (RX_DELIV) represents the HFN corresponding to RX_DELIV, that is, the value of the first H-pdcp-SN-Size bit of RX_DELIV HFN, RCVD_SN represents the SN in the PDU when the receiver receives the PDU at the PDCP layer. The COUNT value is calculated as follows:

If b>B-1, and RCVD_SN<b-(B-1)+A,

Then RCVD_HFN=HFN(RX_DELIV)+1.

Otherwise if RCVD_SN>=SN(RX_DELIV)+window_size,

Then RCVD_HFN=HFN(RX_DELIV)-1.

otherwise

RCVD_HFN=HFN(RX_DELIV).

Therefore, the count value of the PDU received by the receiving end can be determined: RCVD_COUNT=[RCVD_HFN, RCVD_SN]. That is, the receiving end can calculate the corresponding count value RCVD_COUNT for the first PDU and the second PDU respectively.

Case 2: In S410, if it is determined that the first serial number and the second serial number belong to different serial number sets. If the first sequence number belongs to the first sequence number set and the second sequence number belongs to the second sequence number set, at this time, the first SDU and the second SDU have two transmission modes. In the first way, the receiving end simultaneously transmits the first SDU and the second SDU to the upper layer at the PDCP layer. In the second method, the sending priority of the SDU corresponding to the sequence number in the first sequence number set is higher than the sending priority of the SDU corresponding to the sequence number in the second sequence number set, and the receiving end transmits the first priority to the higher layer at the PDCP layer. The SDU transmits the second SDU. If the first sequence number belongs to the second sequence number set and the second sequence number belongs to the first sequence number set, at this time, the first SDU and the second SDU have two transmission modes. In the first way, the receiving end simultaneously transmits the first SDU and the second SDU to the upper layer at the PDCP layer. In the second method, the sending priority of the SDU corresponding to the sequence number in the first sequence number set is higher than the sending priority of the SDU corresponding to the sequence number in the second sequence number set, and the receiving end transmits the second priority to the higher layer at the PDCP layer. The SDU then delivers the first SDU. In order to simplify the description, the following describes an example in which the first serial number belongs to the first serial number set and the second serial number belongs to the second serial number set.

The method provided in the embodiments of this application is described by taking two types of serial number sets or two types of data as examples. Those skilled in the art can understand that the method can be extended to more than two types (for example, three, four or more types). Multiple) types of serial number collections or two or more types of data. For each type of data, a corresponding serial number set can be designed. The values of the elements in different serial number sets may be the same or different, and the embodiment of the present application does not limit it.

Specifically, the first serial number set and the second serial number set can be in the following two forms:

In the first form, the first serial number set may have a certain relationship with the second serial number set. For example, the first serial number set is [0,1,...,N-1], the second serial number set is [N,...,M-1], M and N are positive integers, and M is greater than N.

When the sending end and the receiving end preset or the agreement stipulates to adopt the first form of sequence number set, both the sending end and the receiving end know that the first sequence number set is [0,……,N-1], and the second sequence The number set is [N,...,M-1], because the receiving end can determine which serial number set the serial number belongs to through the size of the serial number, and no additional indication information is needed to indicate which serial number set the serial number belongs to, so Save money. And, in this form, the sender sends corresponding PDUs to the receiver according to the order in which the SDUs reach the PDCP layer. After receiving the PDU, the receiving end decapsulates to obtain the SDU and the sequence number corresponding to each SDU, and obtains the count value according to the sequence number, and sends the SDU to the upper layer after reordering according to the count value, or the receiving end can transmit two sequence numbers to the upper layer at the same time Set the corresponding SDU, but for the corresponding SDU in each sequence number set, the count value needs to be obtained according to the sequence number, and the count value is reordered and sent to the upper layer.

For example, the value of N is 10. When the sender receives SDUs in the PDCP layer in the order of SDU1-SDU2-SDU3-SDU4, where SDU1 and SDU3 are real-time data, and SDU2 and SDU4 are stored data, then the sender In the PDCP layer, it is SDU1 associated sequence number 0, SDU3 associated sequence number 1, SDU2 associated sequence number 11, and SDU4 associated sequence number 12. At the PDCP layer, the sender encapsulates the serial number 0 of SDU1 in the header to generate PDU1, encapsulates the serial number 11 of SDU2 in the header to generate PDU2, encapsulates the serial number 1 of SDU3 in the header to generate PDU3, and encapsulates the serial number 12 of SDU4 in the header Generate PDU4, the sending order of the sender is PDU1-PDU3-PDU2-PDU4. The receiving end may not receive PDU1, PDU2, PDU3, and PDU4 in the order of transmission at the PDCP layer. Some PDUs may be retransmitted. The receiving end can decapsulate PDU1 to obtain SDU1, decapsulate PDU2 to obtain SDU2, and decapsulate PDU3 to obtain SDU3. Decapsulate PDU4 to get SDU4, but since the sequence number of the header of PDU1 is 0, the sequence number of the header of PDU2 is 11, the sequence number of the header of PDU3 is 1, and the sequence number of the message of PDU4 is 12, the receiving end can determine Serial numbers 1 and 2 belong to the first serial number set, and serial numbers 11 and 12 belong to the second serial number set. Optionally, the order that the receiving end can deliver to the upper layer at the PDCP layer may be: SDU1-SDU3-SDU2-SDU4. Optionally, the receiving end can deliver two sets of SDUs to the upper layer at the PDCP layer at the same time. The first set of SDUs are SDU1 and SDU3, and the second set of SDUs are SDU2 and SDU4, but the order of the first set of SDUs is SDU1 and SDU3. , The order of the second group of SDUs is to send SDU2 first, then SDU3.

Exemplarily, the value of PDCP SN is 0 to 2 ^pdcp-SN-Size -1 cycle, which means that if the current PDCP SN is 2 ^pdcp-SN-Size -1, the next PDCP SN is 0, pdcp-SN-Size It is a positive integer, for example, the value of pdcp-SN-Size can be 12 or 18. In a possible implementation, if the first sequence number set and the second sequence number set are in the first form, then N is

or

M is 2 ^pdcp-SN-Size , where,

For the rounding down operation,

It is the round up operation.

In the second form, there may be no relationship between the first serial number set and the second serial number set. For example, the first serial number set is [0,...,P-1], the second serial number set is [0,1,...,Q-1], and P and Q are positive integers.

When the sending end and the receiving end preset or the agreement stipulates to adopt the second form of sequence number set, both the sending end and the receiving end know that the first sequence number set is [0,……,P-1], and the second sequence The number set is [0,……,Q-1]. After receiving the PDU, the receiving end decapsulates and obtains the SDU and the sequence number corresponding to each SDU. If the sequence number corresponding to the first group of SDU belongs to the first sequence number set, the count value is obtained according to the sequence number of the first sequence number set. After the values are reordered, the first group of SDUs corresponding to the sequence numbers in the first sequence number set is sent to the upper layer. If the sequence numbers corresponding to the second group of SDUs belong to the second sequence number set, the count value is obtained according to the sequence numbers of the second sequence number set, and the sequence numbers corresponding to the sequence numbers in the second sequence number set are sent to the upper layer according to the count value. The second group of SDUs, optionally, the first group of SDUs can be sent first, and then the second group of SDUs; or the receiving end can send the first group of SDUs and the second group of SDUs at the same time, but the SDUs in the first group of SDUs need to be The count value determined by the sequence number is sent from small to large, and the SDUs in the second group of SDUs need to be sent from small to large according to the count value determined by the sequence number.

For example, the value of P is 10 and the value of Q is 11. When the sender receives SDU1 and SDU2 at the PDCP layer first, then SDU3 and SDU4 are received, where SDU1 and SDU3 are real-time data, and SDU2 and SDU4 In order to store data, the transmitting end in the PDCP layer is SDU1 associated sequence number 0, SDU3 associated sequence number 1, SDU2 associated sequence number 0, and SDU4 associated sequence number 1. At the PDCP layer, the sender encapsulates the serial number 0 of SDU1 in the header to generate PDU1, encapsulates the serial number 0 of SDU2 in the header to generate PDU2, encapsulates the serial number 1 of SDU3 in the header to generate PDU3, and encapsulates the serial number 1 of SDU4 in the header Generate PDU4, the sending order of the sender is PDU1-PDU3-PDU2-PDU4, that is, the real-time data is sent first, and the stored data is sent after the real-time data is sent.

With reference to the description of the foregoing example, optionally, the sender may encapsulate indication information in the header of each PDU, and the indication information is used to indicate the sequence number set to which the sequence number of the header of the PDU belongs. For example, the value of the specific bit of PDU1 is 0, which means that the sequence number 0 in the header of PDU1 belongs to the first sequence number set [0,...,P-1], and the value of the specific bit of PDU2 is 1. Indicates that the sequence number 0 of the header of PDU2 belongs to the second sequence number set [0,...,Q-1], the value of the specific bit of PDU3 is 0, indicating that the sequence number 1 in the header of PDU3 belongs to the first sequence number Set [0,..., P-1], the value of the specific bit of PDU4 is 1, indicating that the sequence number 1 of the packet header of PDU4 belongs to the second sequence number set [0,..., Q-1]. The receiving end may not receive PDU1, PDU2, PDU3, and PDU4 in the order of transmission at the PDCP layer. Some PDUs may be retransmitted. The receiving end can decapsulate PDU1 to obtain SDU1, decapsulate PDU2 to obtain SDU2, and decapsulate PDU3 to obtain SDU3. Decapsulating PDU4 to get SDU4, but because the indication information of the header of PDU1 indicates that the sequence number 0 belongs to the first sequence number set, the sequence number 0 indicated by the indication information of the header of PDU2 belongs to the second sequence number set, and the indication information of the header of PDU3 indicates The sequence number 1 belongs to the first sequence number set, and the indication information in the header of PDU4 indicates that the sequence number 1 belongs to the second sequence number set, and the receiving end can determine that the sequence number 0 of PDU1 and the sequence number 1 of PDU3 belong to the first sequence number set. The sequence number 0 of PDU2 and the sequence number 1 of PDU4 belong to the second sequence number set. Optionally, the order in which the receiving end can deliver to the upper layer at the PDCP layer may be: SDU1-SDU3-SDU2-SDU4. Optionally, the receiving end at the PDCP layer can deliver two sets of SDUs to the higher layer at the same time. The first set of SDUs are SDU1 and SDU3, and the second set of SDUs are SDU2 and SDU4, but the order of the first set of SDUs is SDU1 and SDU3. , The order of the second group of SDUs is to send SDU2 first, then SDU3.

It should be noted that, in the embodiments of the present application, the foregoing descriptions of the first serial number set and the second serial number set are only by way of example, but the embodiments of the present application are not limited to this. The second serial number set can also be in other forms. For example, the first serial number set can be [0,...,N1-1], and the second serial number set is [N2,...,M-1], N1 And N2 are positive integers, and N2 is greater than or equal to N1, if N1 is equal to N2, that is, the first serial number set and the second serial number set are in the first form described above.

It should be noted that the “simultaneous” mentioned in the embodiments of the present application can be understood as the time difference is less than a preset threshold, and the time difference can refer to an absolute time difference or a relative time difference. Specifically, the receiving end transmits A and B to the upper layer at the PDCP layer at the same time, which means: the time difference between the receiving end to transmit A and B to the upper layer at the PDCP layer is less than the preset threshold; A and B reach the PDCP layer at the same time, which means: A and B reach PDCP The layer time difference is less than the preset threshold.

Therefore, the method for transmitting data provided in the embodiments of the present application is for a PDCP entity, at the sending end, the first sequence number of real-time data is determined in the first sequence number set, and the second sequence number of the stored data is determined in the second sequence number set. Serial number, and priority to send real-time data, which can meet the real-time requirements of real-time data. Compared with the prior art, directly sending data without distinguishing the type of data can reduce the data delay. Take Figure 7, Figure 8 and Figure 9 as examples, Figures 7, 8 and 9 show the simulation results of the method for transmitting data provided by the embodiments of the present application with respect to the prior art. The bit rate of video 1 in FIG. 7 is 700 bit rate (kilobit per second, kbps); the bit rate of video 2 in FIG. 8 is 743 kbps; and the bit rate of video 3 in FIG. 9 is 835 kbps. Figure 7, Figure 8, and Figure 9 show the performance of the freeze ratio and frame playback delay when the channel gain changes from -123dB to -127dB. The solid lines in FIG. 7, FIG. 8, and FIG. 9 represent the simulation results of the data transmission method provided by the embodiment of the present application, and the dotted lines represent the simulation results of the data transmission method in the prior art. It can be seen from Fig. 7, Fig. 8 and Fig. 9 that when the channel gain is greater than -125dB, the channel capacity is large enough. The stall ratio of the method for transmitting data in the embodiment of this application and the method for transmitting data in the prior art And frame playback delay is very low. When the channel gain is less than -125dB, the channel capacity is reduced. At this time, if the current data transmission method is used to transmit the real-time stream and the storage stream at the same time, the real-time stream jam ratio and frame playback delay will increase significantly. With the data transmission method provided in the embodiment of the present application, there is no significant change in the freeze ratio and frame playback delay.

The data transmission method provided by the embodiment of the present application is described in detail above with reference to Figs. 1 to 9, and the data transmission device provided by the embodiment of the present application is described in detail below with reference to Figs. 10 to 12.

FIG. 10 shows a schematic block diagram of an apparatus 500 for transmitting data provided in an embodiment of the present application. The apparatus 500 may correspond to the sending end described in the foregoing method, or may correspond to the chip or component of the sending end, and each of the apparatus 500 The modules or units may be respectively used to execute various actions or processing procedures performed by the sending end in the foregoing method. As shown in FIG. 10, the data transmission device 500 may include a processing unit 510 and a transceiver unit 520.

The processing unit 510 is configured to determine a set of target serial numbers according to the data type of the first SDU, where the set of target serial numbers is a first serial number set or a second serial number set, and according to the first serial number set The transmission priority of the PDU obtained by the sequence number of is higher than the transmission priority of the PDU obtained according to the sequence number in the second sequence number set;

The processing unit 510 is further configured to determine the first sequence number of the first SDU in the target sequence number set;

The transceiver unit 520 is configured to send a first protocol data unit PDU, where the first PDU is a PDU obtained by encapsulating the first SDU according to the first sequence number.

As an optional embodiment, the processing unit 510 is specifically configured to:

If the first SDU is data of the first type, the target sequence set is a first sequence number set;

If the first SDU is data of the second type, the target sequence set is the second sequence number set.

As an optional embodiment, the first type of data is real-time data, and the second type of data is stored data.

As an optional embodiment, the first sequence number set is [0,...,N-1], the second sequence number set is [N,...,M-1], and M and N are positive Integer, and M is greater than N.

As an optional embodiment, the first sequence number set is [0,...,P-1], the second sequence number set is [0,...,Q-1], and P and Q are positive Integer.

As an optional embodiment, the header of the first PDU includes first indication information, and the first indication information is used to indicate the sequence number set to which the first sequence number belongs, or used to indicate data of the first PDU Types of.

As an optional embodiment, the processing unit 510 is further configured to:

The data type of the first SDU is determined according to the transport layer protocol type of the first SDU.

If the transport layer protocol type of the first SDU is the UDP protocol, the first SDU is data of the first type;

If the transport layer protocol type of the first SDU is not the UDP protocol, the data type of the first SDU is determined according to the destination port number of the transport layer of the first SDU.

If the destination port number of the transport layer is 554, the first SDU is the first data type;

If the destination port number of the transport layer is not 554, the first SDU is of the second data type.

It should be understood that, for the specific process of each unit in the device 500 executing the above corresponding steps, please refer to the foregoing description in conjunction with the method embodiments in FIGS. 3 to 5, and for the sake of brevity, details are not repeated here.

FIG. 11 shows a schematic block diagram of an apparatus 600 for transmitting data provided by an embodiment of the present application. The apparatus 600 may correspond to the receiving end described in the foregoing method, or may correspond to the receiving chip or component, and each of the apparatus 600 The modules or units may respectively be used to perform various actions or processing procedures performed by the receiving end in the above method. As shown in FIG. 11, the data transmission device 600 may include a receiving unit 610 and a transmitting unit 620.

The receiving unit 610 is configured to receive the first protocol data unit PDU and the second PDU;

The transferring unit 620 is configured to transfer the first sequence number corresponding to the first PDU to the higher layer according to the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs. A service data unit SDU and a second SDU corresponding to the second PDU.

As an optional embodiment, the transferring unit 620 is specifically configured to: the sequence number set to which the first sequence number belongs is the same as the sequence number set to which the second sequence number belongs, and according to the first sequence number and the sequence number set The size of the second sequence number is transferred to the higher layer of the first service data unit SDU corresponding to the first PDU and the second SDU corresponding to the second PDU.

As an optional embodiment, the transferring unit 620 is specifically configured to: if the first sequence number belongs to a first sequence number set, and the second sequence number belongs to a second sequence number set, then the corresponding second PDU The second SDU first delivers the first service data unit SDU corresponding to the first PDU to the higher layer.

As an optional embodiment, the header of the first PDU includes first indication information, and the first indication information is used to indicate the sequence number set to which the first sequence number belongs; the header of the second PDU includes the first 2. Indication information, where the second indication information is used to indicate the sequence number set described by the second sequence number.

It should be understood that, for the specific process of each unit in the device 600 performing the above corresponding steps, please refer to the foregoing description in conjunction with the method embodiments of FIGS. 3 to 5, and for the sake of brevity, details are not repeated here.

The apparatus 500 of each of the foregoing solutions has the function of implementing the corresponding steps performed by the sending end in the foregoing method, and the apparatus 600 of each of the foregoing solutions has the function of implementing the corresponding steps performed by the receiving end of the foregoing method; the functions can be implemented by hardware or software, or Implement the corresponding software through hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the sending unit can be replaced by a communication interface, the receiving unit can be replaced by a communication interface, and other units, such as the determining unit, can be replaced by a processor to execute each method separately Transceiving operations and related processing operations in the embodiment. In the embodiment of the present application, the communication interface of a device is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transmitter, a receiver, a transceiver, a circuit, a bus, a module, a pin, or another type of communication interface, which is not limited in the embodiment of the present application.

In a specific implementation process, the processor can be used to perform, for example, but not limited to, baseband related processing, and the communication interface can be used to perform, for example, but not limited to, information exchange. The above-mentioned devices may be respectively arranged on independent chips, or at least partly or fully arranged on the same chip. For example, the processor can be further divided into an analog baseband processor and a digital baseband processor, where the analog baseband processor and the communication interface can be integrated on the same chip, and the digital baseband processor can be set on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be combined with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) Integrated on the same chip. Such a chip may be called a system on chip (SOC). Whether each device is independently arranged on different chips or integrated on one or more chips often depends on the specific needs of product design. The embodiment of the present application does not limit the specific implementation form of the foregoing device.

It can be understood that the processor involved in the foregoing embodiments can execute program instructions through a hardware platform with a processor and a communication interface to implement the functions involved in any design of the foregoing embodiments of this application, based on this As shown in FIG. 12, an embodiment of the present application provides a schematic block diagram of an apparatus 700 for transmitting data. The apparatus 700 includes a processor 710, a communication interface 720, and a memory 730. The processor 710, the communication interface 720, and the memory 730 are coupled to communicate with each other. The memory 730 is used to store instructions, and the processor 710 is used to execute the instructions stored in the memory 730 to control the communication interface 720 to send signals and/or receive signal. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.

Wherein, in a possible implementation manner, if the device 700 is the transmitting end, the processor 710 is configured to determine a target sequence number set according to the data type of the first SDU, where the target sequence number set is the first sequence Number set or second sequence number set, the transmission priority of the PDU obtained according to the sequence number in the first sequence number set is higher than the transmission priority of the PDU obtained according to the sequence number in the second sequence number set; The processor 710 is further configured to determine the first sequence number of the first SDU in the target sequence number set; the processor 710 uses the communication interface 720 to send a first protocol data unit PDU, where the first PDU is based on the first The sequence number is the PDU obtained by encapsulating the first SDU.

In a possible implementation manner, if the apparatus 700 is the receiving end, the processor 710 uses the communication interface 720 to receive the first protocol data unit PDU and the second PDU; the processor 710 is configured to perform according to the first PDU of the first PDU The sequence number set to which the sequence number belongs and the sequence number set to which the second sequence number of the second PDU belongs are delivered to the higher layer of the first service data unit SDU corresponding to the first PDU and the second SDU corresponding to the second PDU.

It should be understood that the apparatus in FIG. 10 or the apparatus in FIG. 11 in the embodiment of the present application may be implemented by the apparatus 700 in FIG. 12, and may be used to execute the respective steps and/or steps corresponding to the sending end and the receiving end in the foregoing method embodiment. Or process.

It can be understood that the methods, processes, operations, or steps involved in the various designs described in the embodiments of the present application can be implemented in a one-to-one correspondence manner through computer software, electronic hardware, or a combination of computer software and electronic hardware. Corresponding realization. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. For example, considering the good versatility, low cost, software and hardware decoupling, etc., they can be implemented by executing program instructions, for example , Considering system performance and reliability, etc., it can be realized by using a dedicated circuit. Ordinary technicians can use different methods to achieve the described functions for each specific application, which is not limited here.

According to the method provided in the embodiments of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the method in the above embodiment . The various embodiments in this application can also be combined with each other.

According to the method provided in the embodiments of the present application, the present application also provides a computer-readable medium with a program code stored in the computer-readable interpretation, and when the program code runs on a computer, the computer executes the method in the foregoing embodiment .

In the embodiments of the present application, it should be noted that the foregoing method embodiments in the embodiments of the present application may be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. There are many different types of RAM, such as static RAM (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate Synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random memory Take memory (direct rambus RAM, DR RAM).

It should be understood that, in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation.

The terms "first" and "second" appearing in this application are only used to distinguish different objects, and "first" and "second" themselves do not limit the actual order or function of the objects they modify. Any embodiment or design solution described as "exemplary", "example", "for example", "optionally" or "in certain implementations" in this application should not be construed as being better than other implementations. Examples or design solutions are more preferred or more advantageous. To be precise, these words are used to present related concepts in a concrete way.

Various messages/information/equipment/network elements/systems/devices/operations that may appear in this application have been assigned names. It is understandable that these specific names do not constitute a reference to related objects. Limited, the assigned name can be changed according to factors such as the scene, context, or usage habits. The understanding of the technical meaning of the technical terms in this application should be determined mainly from the functions and technical effects embodied/implemented in the technical solution .

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in the form of a computer program product in whole or in part. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, terminal equipment, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic disk), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here. In the embodiments of the present application, provided that there is no logical contradiction, the embodiments can be mutually cited. For example, methods and/or terms between method embodiments can be mutually cited, such as functions and/or functions between device embodiments. Or terms may refer to each other, for example, functions and/or terms between the device embodiment and the method embodiment may refer to each other.

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

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

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

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for transmitting data, characterized in that it comprises:

Determine the target sequence number set according to the data type of the first SDU, where the target sequence number set is the first sequence number set or the second sequence number set, and the PDU obtained according to the sequence numbers in the first sequence number set The sending priority of is higher than the sending priority of the PDU obtained according to the sequence numbers in the second sequence number set;

Determine the first sequence number of the first SDU in the target sequence number set;

Send a first protocol data unit PDU, where the first PDU is a PDU obtained by encapsulating the first SDU according to the first sequence number.
The method according to claim 1, wherein the determining the target sequence number set according to the data type of the first SDU comprises:

If the first SDU is data of the first type, the target sequence set is a first sequence number set;

If the first SDU is data of the second type, the target sequence set is the second sequence number set.
The method according to claim 2, wherein the first type of data is real-time data, and the second type of data is stored data.
The method according to any one of claims 1 to 3, wherein the first sequence number set is [0,...,N-1], and the second sequence number set is [N,... …, M-1], M and N are positive integers, and M is greater than N.
The method according to any one of claims 1 to 3, wherein the first sequence number set is [0,..., P-1], and the second sequence number set is [0,... …, Q-1], P and Q are positive integers.
The method according to any one of claims 1 to 5, wherein the header of the first PDU includes first indication information, and the first indication information is used to indicate the sequence to which the first sequence number belongs Number set, or used to indicate the data type of the first PDU.
The method according to any one of claims 1 to 6, wherein the method further comprises:

The data type of the first SDU is determined according to the transport layer protocol type of the first SDU.
The method according to claim 7, wherein the determining the data type of the first SDU according to the transport layer protocol type of the first SDU comprises:

If the transport layer protocol type of the first SDU is the UDP protocol, the first SDU is data of the first type;

If the transport layer protocol type of the first SDU is not the UDP protocol, the data type of the first SDU is determined according to the destination port number of the transport layer of the first SDU.
The method according to claim 8, wherein the determining the data type of the first SDU according to the destination port number of the transport layer of the first SDU comprises:

If the destination port number of the transport layer is 554, the first SDU is the first data type;

If the destination port number of the transport layer is not 554, the first SDU is of the second data type.
A method for transmitting data, characterized in that it comprises:

Receiving the first protocol data unit PDU and the second PDU;

According to the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs, deliver the first service data unit SDU and SDU corresponding to the first PDU to the higher layer The second SDU corresponding to the second PDU.
The method according to claim 10, wherein the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs to the higher layer Transmitting the first service data unit SDU corresponding to the first PDU and the second SDU corresponding to the second PDU includes:

The sequence number set to which the first sequence number belongs is the same as the sequence number set to which the second sequence number belongs, and according to the first sequence number and the second sequence number, the information corresponding to the first PDU is delivered to the higher layer The first service data unit SDU and the second SDU corresponding to the second PDU.
The method according to claim 10, wherein the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs to the higher layer Transmitting the first service data unit SDU corresponding to the first PDU and the second SDU corresponding to the second PDU includes:

If the first sequence number belongs to the first sequence number set, and the second sequence number belongs to the second sequence number set, the first service data unit corresponding to the first PDU is given priority to the second SDU corresponding to the second PDU The SDU is submitted to the top.
The method according to any one of claims 10 to 12, wherein the header of the first PDU includes first indication information, and the first indication information is used to indicate the sequence to which the first sequence number belongs Number set; the header of the second PDU includes second indication information, and the second indication information is used to indicate the sequence number set of the second sequence number.
A device, characterized by being used to implement the method according to any one of claims 1-9.
A device comprising a processor and a memory, the memory is coupled to the processor, and the processor is configured to execute the method according to any one of claims 1-9.
A device including a processor and a communication interface,

The processor is configured to determine a set of target serial numbers according to the data type of the first SDU, where the set of target serial numbers is a first serial number set or a second serial number set, and according to the data in the first serial number set The transmission priority of the PDU obtained by the sequence number is higher than the transmission priority of the PDU obtained according to the sequence number in the second sequence number set;

The processor is further configured to determine the first sequence number of the first SDU in the target sequence number set;

The processor transmits a first protocol data unit PDU by using the communication interface, where the first PDU is a PDU obtained by encapsulating the first SDU according to the first sequence number.
A device, characterized by being used to implement the method according to any one of claims 10-13.
A device comprising a processor and a memory, the memory is coupled to the processor, and the processor is configured to execute the method according to any one of claims 10-13.
A device including a processor and a communication interface,

The processor receives the first protocol data unit PDU and the second PDU by using the communication interface;

The processor is configured to, according to the sequence number set to which the first sequence number of the first PDU belongs and the sequence number set to which the second sequence number of the second PDU belongs, to transmit the first sequence number corresponding to the first PDU to a higher layer. The service data unit SDU and the second SDU corresponding to the second PDU.
A communication system, comprising the device according to any one of claims 14-16, and the device according to any one of claims 17-19.
A computer-readable storage medium, comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1-13.
A computer program product comprising instructions, which when run on a computer, cause the computer to execute the method of any one of claims 1-13.