WO2019076347A1

WO2019076347A1 - Communication method and communication apparatus

Info

Publication number: WO2019076347A1
Application number: PCT/CN2018/110880
Authority: WO
Inventors: 于峰; 高峰; 蔺波; 于光炜
Original assignee: 华为技术有限公司
Priority date: 2017-10-19
Filing date: 2018-10-18
Publication date: 2019-04-25
Also published as: CN109688179B; CN109688179A

Abstract

The present application provides a communication method and a communication apparatus. The communication method comprises: a terminal device receives first instruction information sent by a network device, the first instruction information being used for instructing the terminal device to delete first data from a cache, the first data being sent by the network device to the terminal device and stored in a first cache space in the cache, and the first data being not submitted to an application layer of the terminal device yet; the terminal device deletes the first data from the cache according to the first instruction information, and the terminal device receives second data sent by the network device and stores a part or all of the second data in the first cache space. Therefore, communication and control may not be affected when the cache of the terminal device is too small.

Description

Communication method and communication device

The present application claims priority to Chinese Patent Application No. PCT Application No. No. No. No. No. No. No. No. No. No. No. No.

Technical field

The present application relates to the field of communications, and more particularly to a communication method and a communication device.

Background technique

A control technique is currently known in which a communication device needs to perform an action corresponding to the received data at a predetermined time. Therefore, it is necessary to ensure that the data arrives at the communication device before the specified time. For this, a timing communication technology, that is, a terminal can be utilized. The device may store data in the cache that needs to be sent to the network device before the specified time, and send data to the network device at the specified time. And, the terminal device can store the data received from the network device in the cache and submit the data to the application layer at a specified time.

However, due to the hardware configuration of the terminal device, the size of the cache of the terminal device may not meet the data cache requirement, and the above control technology cannot be implemented.

Summary of the invention

The present application provides a communication method and communication apparatus capable of avoiding an influence on communication and control due to a buffer of a terminal device being too small.

In a first aspect, a communication method is provided, including: receiving, by a terminal device, first indication information that is sent by a network device, where the first indication information is used to indicate that the terminal device deletes first data from a cache, where the first data is Data sent by the network device to the terminal device, the first data is stored in the first cache space in the cache, the first data has not been submitted to the application layer of the terminal device; and the terminal device is configured according to the first indication information. The first data is deleted in the cache; the terminal device receives the second data sent by the network device, and stores part or all of the second data in the first cache space.

According to the communication method of the present application, before the network device needs to send the second data that needs to be stored in the cache by the terminal device, the network device is instructed to delete the first device that is currently stored in the first cache space of the terminal device. a data that enables the terminal device to store the second data received from the network device in the first cache space, thereby ensuring that the second data can be stored in the cache of the terminal device, thereby avoiding caching by the terminal device Too small to cause an impact on communication and control.

Optionally, before the receiving, by the terminal device, the first indication information sent by the network device, the method further includes: the terminal device sending the second indication information to the network device, where the second indication information is used to indicate the current The size of the available cache space, wherein the first data is determined by the network device according to the second indication information.

The communication method according to the present application can reliably satisfy the requirement of the second data to the cache space by causing the network device to determine the first cache space (ie, the cache space for storing the first data) according to the current available cache space of the terminal device. Thereby, the effect of the present application can be further improved.

Optionally, the second indication information is further used to indicate the time that the cached data in the cache needs to be submitted to the application layer, and/or the second indication information is further used to indicate the priority of the data cached in the cache.

The communication method according to the present application determines the first cache space (ie, for storing the first data) by causing the network device to submit the data to the application layer according to the data currently buffered by the terminal device and/or the priority of the data currently cached by the terminal device. The cache space) can avoid important data or data that is urgently required to be submitted to the application layer to be selected as the first data, thereby improving the practicability of the application.

Optionally, the second indication information is further used to indicate a protocol layer to which the first cache space belongs, where the protocol layer includes a packet data convergence protocol PDCP layer, a radio link control protocol RLC layer, and a media connection. Incoming control MAC layer or service data adaptive SDAP layer.

Optionally, the second indication information is further used to indicate a protocol layer that the first data is currently cached, where the protocol layer includes a packet data convergence protocol PDCP layer, a radio link control protocol RLC layer, and a media connection. Incoming control MAC layer or service data adaptive SDAP layer.

Optionally, the second indication information shown is carried in a PDCP Protocol Data Unit PDU.

Optionally, the second indication information shown is carried in the RLC PDU.

Optionally, the second indication information shown is carried in the MAC control unit CE.

Optionally, the second indication information is carried in the downlink control information DCI.

Optionally, the terminal device sends the second indication information to the network device, where the terminal device periodically sends the second indication information to the network device.

Optionally, the terminal device sends the second indication information to the network device, where the terminal device sends the second indication to the network device when the size of the current available buffer space is less than or equal to a preset first threshold. information.

According to the communication method of the present application, by enabling the terminal device to send the second indication information to the network device when determining that the currently available cache space is small, the network device can know in time that the currently available cache space of the terminal device cannot meet the cache requirement of the second data. In order to trigger the delivery process of the first indication information, the reliability and effect of the communication method of the present application can be further improved.

Optionally, after receiving the third indication information sent by the network device, the terminal device sends the second indication information to the network device, where the third indication information is used to indicate that the terminal device sends the second information to the network device. Instructions.

Optionally, the first data is determined by the network device according to the related information of the second data, where the related information of the second data includes information about a size of the second data, and a buffer space currently available in the cache The size of the data that can be stored in the first cache space is greater than or equal to the size of the second data.

Thereby, it is possible to further ensure that the buffer space required for the second data is satisfied.

Optionally, the related information of the second data includes information about a priority of the second data, and the priority of the second data is higher than a priority of the first data, or a priority of the second data The first data has the same priority.

Optionally, the priority of the data in the embodiment of the present application is determined according to at least one of the following parameters:

The transmission delay of the data, the reliability of the transmission of the data, the jitter of the data, and the time the data needs to be delivered to the application layer.

Optionally, the transmission delay of the data, the reliability of transmission of the data, or the transmission jitter of the data is determined according to the quality of service level indication QCI of the bearer to which the data belongs.

Thereby, it is possible to prevent the important data from being selected as the first data, and it is possible to improve the practicability of the application.

Optionally, the first indication information is further used to indicate a location of the first data in the cache.

Optionally, the first indication information is further used to indicate an index of the first data in the cached data.

Optionally, the first indication information is further used to indicate a size of the first data.

Thereby, the terminal device can be made to easily determine the first data.

Optionally, the communication method further includes: the terminal device receiving the first data that is retransmitted by the network device.

The second aspect provides a communication method, including: the network device sends the first indication information to the terminal device, where the first indication information is used to indicate that the terminal device deletes the first data from the cache, where the first data is the network Data sent by the device to the terminal device, the first data is stored in the first cache space in the cache, the first data is not yet submitted to the application layer of the terminal device; the network device sends the second data to the terminal device, Part or all of the second data is stored in the first cache space by the terminal device.

Optionally, the second indication information shown is carried in the RLC PDU.

Optionally, before the sending, by the network device, the first indication information to the terminal device, the method further includes: receiving, by the network device, the second indication information, where the second indication information is used to indicate the current available cache in the cache. The size of the space; the network device determines the first data according to the second indication information.

Optionally, the second indication information is further used to indicate a time that the cached data in the cache needs to be submitted to the application layer, and/or the second indication information is further used to indicate a priority of the cached data in the cache. .

Optionally, the second means that the information is periodically sent by the terminal device.

Optionally, the second indication information is sent by the terminal device when determining that the size of the current available cache space is less than or equal to a preset first threshold.

Optionally, the second indication information is sent by the terminal device according to the third indication information received from the network device, where the third indication information is used to indicate that the terminal device sends the second indication information to the network device.

Optionally, before the sending, by the network device, the first indication information to the terminal device, the method further includes: determining, by the network device, the first data according to the related information of the second data, where the related information of the second data includes the first The information of the size of the data, and the currently available buffer space in the cache and the size of the data that the first buffer space can store are greater than or equal to the size of the second data.

Optionally, before the sending, by the network device, the first indication information to the terminal device, the method further includes: determining, by the network device, the first data according to the related information of the second data, where the related information of the second data includes the first The priority information of the two data, and the priority of the second data is higher than the priority of the first data.

Thereby, it is possible to prevent important data from being selected as the first data, and it is possible to improve the practicability of the application.

Optionally, the communication method further includes: the network device resending the first data to the terminal device.

Thereby, the terminal device can be made to easily determine the first data.

The third aspect provides a communication method, including: when the terminal device needs to send the first data to the network device, deleting the second data from the cache of the terminal device, where the second data is the terminal device from the network device Received data, the second data is stored in a first cache space in the cache, the second data has not been submitted to an application layer of the terminal device; the terminal device stores the portion of the first data in the first cache space Or all, and sending the first data to the network device at a preset sending time; the terminal device sends retransmission indication information to the network device, where the retransmission indication information is used to instruct the network device to resend the second Data; the terminal device receives second data that is retransmitted by the network device according to the retransmission indication information.

According to the communication method of the present application, before the terminal device needs to send the first data to the network device at the preset time, the terminal device can delete the second data currently stored in the first cache space of the terminal device, so that the terminal can be enabled. The device stores the first data in the first cache space, thereby ensuring that the first data can be sent at the preset time, so that the influence on the communication and the control caused by the buffer of the terminal device being too small can be avoided.

Optionally, before deleting the second data from the cache of the terminal device, the method further includes: determining, by the terminal device, the second data according to the reference information, where the reference information is used to indicate at least one of the following parameters: The size of the first cache space, the size of the current available cache space in the cache, the priority of the first data, the priority of the data cached in the cache, the sending time, and the terminal device stored in the cache The data received by the network device needs to be submitted to the application layer of the terminal device.

Optionally, the currently available cache space in the cache and the size of the data that the first cache space can store are greater than or equal to the size of the first data.

Optionally, the priority of the first data is higher than the priority of the second data, or the priority of the first data is the same as the priority of the second data.

Optionally, the moment when the second data needs to be submitted to the application layer of the terminal device is after the sending moment.

The communication method according to the present application determines the first cache space (ie, for storage by causing the network device to submit to the application layer according to the data currently cached by the terminal device, the priority of the data currently cached by the terminal device, and the currently available cache space. The buffer space of the second data can prevent important data or data that is urgently required to be submitted to the application layer from being selected as the second data, and can reliably satisfy the requirement of the first data to the cache space, thereby further improving the effect of the present application. Can improve the practicality of the application.

A fourth aspect provides a communication method, including: receiving, by a network device, first data that is sent by a terminal device at a preset sending time, where part or all of the first data is stored in the first buffer before the sending time In the space, the first cache space is used to store second data before storing the first data, where the second data is data received by the terminal device from the network device, and the second data has not been submitted to the terminal device. The second data is that the terminal device is deleted from the first cache space by the terminal device when determining that the first data needs to be sent; the network device receives retransmission indication information, the retransmission indication information from the terminal device And configured to instruct the network device to resend the second data; the network device resends the second data to the terminal device according to the retransmission indication information.

Optionally, the second data is determined by the terminal device according to the reference information, where the reference information is used to indicate at least one of the following parameters: a size of the first cache space, and a size of a current available cache space in the cache. The priority of the first data, the priority of the data cached in the cache, the time of the transmission, and the time at which the data received by the terminal device in the cache from the network device needs to be submitted to the application layer of the terminal device.

Optionally, the priority of the first data is higher than the priority of the second data.

In a fifth aspect, there is provided a communication apparatus comprising means for performing the steps of any of the first to fourth aspects described above and embodiments thereof.

Optionally, the device comprises a chip or circuit, such as a chip or circuit that can be disposed within the communication device.

Optionally, the device is a communication device, such as a terminal device or a network device.

In a sixth aspect, a communication device is provided, comprising a memory and a processor for storing a computer program for calling and running the computer program from a memory, such that the communication device performs the first to fourth aspects described above A communication method in any of the aspects and embodiments thereof.

In a seventh aspect, a chip system is provided, comprising a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device on which the chip system is installed performs the above The communication method of any of the first aspect or the second aspect and the embodiment thereof.

In an eighth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is processed by a communication unit, a processing unit or a transceiver of a communication device (eg, a terminal device or a network device) When the device is in operation, the communication device is caused to perform the communication method in any of the above first to fourth aspects and embodiments thereof.

According to a ninth aspect, there is provided a computer readable storage medium storing a program causing a communication device (eg, a terminal device or a network device) to perform any of the above first to fourth aspects On the one hand and the communication method in its embodiment.

According to the communication method and the communication device of the embodiment of the present application, it is possible to reduce the influence of the uncertainty of the transmission delay of the wireless transmission mode on the action execution of the receiving device.

DRAWINGS

1 is a schematic diagram showing an example of a communication system according to an embodiment of the present application.

FIG. 2 is a schematic flowchart of an example of a communication method according to an embodiment of the present application.

FIG. 3 is a schematic flowchart of another example of a communication method according to an embodiment of the present application.

FIG. 4 is a schematic flowchart of an example of a communication device according to an embodiment of the present application.

FIG. 5 is a schematic flowchart of another example of a communication device according to an embodiment of the present application.

FIG. 6 is a schematic flowchart of an example of a terminal device according to an embodiment of the present application.

FIG. 7 is a schematic flowchart of another example of an access network device according to an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The terms "component," "module," "system," and the like, as used in this specification, are used to mean a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and a computing device can be a component. One or more components can reside within a process and/or execution thread, and the components can be located on one computer and/or distributed between two or more computers. Moreover, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on signals having one or more data packets (eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems) Communicate through local and/or remote processes.

It should be understood that the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access. (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system , Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), or next-generation communication systems, etc., where the next generation communication system may include, for example. , fifth-generation (5G) communication system.

In general, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technologies, mobile communication systems will not only support traditional communication, but also support, for example, device to device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), and Vehicle to Vehicle (V2V) communication.

The communication method of the present application can be applied to communication between a network device and a terminal device.

By way of example and not limitation, in the embodiment of the present application, the terminal device may also be referred to as a user equipment (User Equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, Mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device can be a station in the WLAN (STAION, ST), which can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, and a personal digital processing. (Personal Digital Assistant, PDA) device, handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, and next-generation communication system, for example, a terminal device in a 5G network or Terminal equipment in the future evolution of the Public Land Mobile Network (PLMN) network.

By way of example and not limitation, in the embodiment of the present application, the terminal device may also be a wearable device. A wearable device, which can also be called a wearable smart device, is a general term for applying wearable technology to intelligently design and wear wearable devices such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are more than just a hardware device, but they also implement powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-size, non-reliable smartphones for full or partial functions, such as smart watches or smart glasses, and focus on only one type of application, and need to work with other devices such as smartphones. Use, such as various smart bracelets for smart signs monitoring, smart jewelry, etc.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system, and the IoT is an important component of future information technology development, and its main technical feature is to pass the article through the communication technology. Connected to the network to realize an intelligent network of human-machine interconnection and physical interconnection.

In the embodiment of the present application, the IOT technology can achieve massive connection, deep coverage, and terminal power saving through, for example, Narrow Band NB technology. For example, the NB includes only one Resource Block (RB), that is, the bandwidth of the NB is only 180 KB. To achieve massive access, the terminal must be required to be discrete in access. According to the communication method of the embodiment of the present application, the congestion problem of the IOT technology massive terminal when accessing the network through the NB can be effectively solved.

The access network device may be a device for communicating with the mobile device, such as an access network device, and the access network device may be an access point (AP) in the WLAN, a base station in the GSM or CDMA (Base Transceiver Station, BTS), which may also be a base station (NodeB, NB) in WCDMA, or a gNB in a new radio system (NR) system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE. , or a relay station or an access point, or an in-vehicle device, a wearable device, and an access network device in a future 5G network or an access network device in a future evolved PLMN network.

In addition, in the embodiment of the present application, the access network device provides a service for the cell, and the terminal device communicates with the access network device by using a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell, where the cell It may be a cell corresponding to an access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell, where the small cell may include: a metro cell and a micro cell ( Micro cell), Pico cell, Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

In addition, multiple carriers can work at the same frequency on the carrier in the LTE system or the 5G system. In some special scenarios, the concept of the carrier and the cell can be considered to be equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identifier (Cell ID) of the secondary cell working in the secondary carrier are simultaneously carried. In this case, the concept of the carrier and the cell can be considered to be equivalent, for example, the UE accessing one carrier and accessing one cell are equivalent.

The core network device can be connected to multiple access network devices for controlling the access network device, and can distribute data received from the network side (for example, the Internet) to the access network device.

The functions and specific implementation manners of the terminal device, the access network device, and the core network device listed above are merely exemplary descriptions, and the application is not limited thereto.

In this embodiment, the terminal device may be a receiving device of data, and the network device may be a transmitting device of data.

Alternatively, in the embodiment of the present application, the network device may be a receiving end device of data, and the terminal device may be a receiving end device of data.

The receiving end device is capable of receiving data from the transmitting end device, and performing an action (or processing) corresponding to the data at the application layer. By way of example and not limitation, for example, the receiving end device may be a controlled device (eg, a Programmable Logic Controller (PLC) controlled device, such as an industrial robot, etc., specifically, the receiving end device An operation command (ie, an example of data) from a controller (eg, the PLC described above) can be received (eg, received directly or received by a relay device) and the actions indicated by the operation command can be performed. It should be understood that the above enumerated transmissions Specific examples of the end device or the sink device are merely exemplary, and the present application is not limited thereto.

By way of example and not limitation, in the embodiment of the present application, the receiving end device may include a transport layer (or a communication module) and an application layer (or a function execution module), where the transport layer is used for wireless communication. Or receiving or transmitting data in a wired communication manner, the application layer is configured to perform processing corresponding to the received data (eg, performing an action indicated by the received operation instruction). By way of example and not limitation, the receiving end device may be a smart device such as an industrial robot. By way of example and not limitation, the transport layer can have any existing communication protocol, or an air interface protocol can implement wireless communication, for example, the transport layer can include a communication protocol stack. And, the application layer can run the application, and the application controls the action of the receiving device.

Similarly, the transmitting device is also configured with a transport layer (for example, the above communication protocol stack), and wireless communication is implemented through the transport layer.

Here, the communication protocol stack may also be referred to as a protocol stack, which refers to the sum of layers of protocols in the network, and its image reflects the process of file transfer in a network: from the upper layer protocol to the underlying protocol, and then by the underlying protocol. Go to the upper layer agreement.

As an example and not limitation, in the embodiment of the present application, the protocol stack used by the wireless communication may include at least one protocol layer or a combination of multiple protocol layers, and each layer protocol may have multiple protocol entities:

I1. Packet Data Convergence Protocol (PDCP) layer

The PDCP layer is located above the RLC layer and is responsible for processing the service data of the packet service. PDCP is mainly used to process packet data carrying network layers on the air interface, such as Internet Protocol (IP) data streams. The PDCP layer is mainly used to compress and decompress/encrypt and decrypt information.

I2. Radio Link Control (RLC) layer

RLC is a protocol developed in the third generation mobile system to ensure reliable quality of service (QoS) for data transmission services. This is because the data transmission channel condition of the mobile communication in the radio propagation environment is very poor, and the error rate of the transmission data is extremely high, so ensuring the service quality of the data transmission service is an arduous task.

The RLC layer is located above the MAC layer and is mainly used to provide an abstraction of different data link types for the upper layer. The most important of these is to provide a reliable data transmission link, which is used to shield the impact of the wireless link and provide reliable data transmission for the upper layer. The RLC layer implements these logical link abstractions by using different packet transceiving mechanisms such as segmentation and automatic repeat-reQuest (ARQ). The RLC layer can segment and concatenate information or reassemble segmented and concatenated information.

I3. Media Access Control (MAC) layer

The MAC layer is located above the physical layer and is mainly responsible for controlling and connecting the physical medium of the physical layer, for selecting a combination of transport formats, and implementing related functions of scheduling and hybrid automatic repeat request (HARQ).

The PDCP layer, the RLC layer, and the MAC layer may also be referred to as an L2 layer.

I4. Physical layer

The PHY layer may also be referred to as an L1 layer, and is mainly used to provide information transmission services for the MAC layer and the upper layer, and performs code modulation processing or demodulation decoding processing according to the selected transmission format combination.

I5. Radio Resource Control (RRC) layer

The RRC layer may also be referred to as an L3 layer and may include, but is not limited to, the following functions:

(1) Broadcast system information.

(2) RRC connection control, including:

a. Paging.

b. RRC connection establishment, modification and release.

c. Initial security activation.

d. RRC connection mobility, including co-frequency and inter-frequency handover, related security processing, key/algorithm change, RRC context information specification for transmission between network nodes.

e. Establishment, modification, and release of user data resource block bearers.

f. Radio resource configuration management, including ARQ configuration, HARQ configuration, Discontinuous reception (DRX) configuration allocation and modification.

g. QoS control, including uplink and downlink semi-persistent scheduling configuration information, configuration and modification of UE side uplink rate control parameters.

h. Radio link failure recovery.

(3) Transferability between Radio Access Technology (RAT).

(4) Measurement configuration and report, specifically, may include the following process:

a. Establishment, modification, and release of measurements (eg, co-frequency, inter-frequency, and measurements of different RATs).

b. Establish and release measurement intervals.

c. Measurement report.

(5) Other functions, such as transmission of non-3GPP specific information, transmission of UE radio access performance information, and the like.

(6) General protocol error handling.

(7) Self-configuration and self-optimization.

I6. Service Data Adaptation Protocol (SDAP) layer

The SDAP layer may be located on the PDCP layer, and is responsible for mapping between data flows of various QoSs and data radio bearers, and marking data flow identifiers in uplink and downlink data packets.

It should be understood that the functions of the protocol layers and the protocol layers included in the communication protocol stack enumerated above are merely exemplary. The application is not limited thereto, and other protocol layers and functions that can be used for wireless communication or wired communication are It falls within the scope of protection of the embodiments of the present application.

In addition, in the embodiment of the present application, each of the foregoing protocol layers may have a cache space, where a buffer space corresponding to each protocol layer may be used to cache data received from other layers, or corresponding to each protocol layer. Cache space can be used to cache data that needs to be sent to other layers.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, contacts, word processing software, and instant messaging software. Moreover, the specific structure of the execution body of the method provided by the embodiment of the present application is not particularly limited as long as the program of the code of the method provided by the embodiment of the present application can be run by using the program according to the present application. The method can be communicated. For example, the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a function module that can call a program and execute a program in the terminal device or the network device.

Furthermore, various aspects or features of embodiments of the present application can be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, the computer readable medium may include, but is not limited to, a magnetic storage device (eg, a hard disk, a floppy disk, or a magnetic tape, etc.), such as a compact disc (CD), a digital versatile disc (Digital Versatile Disc, DVD). Etc.), smart cards and flash memory devices (eg, Erasable Programmable Read-Only Memory (EPROM), cards, sticks or key drivers, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, without limitation, a wireless channel and various other mediums capable of storing, containing, and/or carrying instructions and/or data.

It should be noted that, in the embodiment of the present application, multiple applications may be run at the application layer. In this case, the application that performs the communication method of the embodiment of the present application is used to control the receiving device to complete the received data. The application of the corresponding action can be a different application.

1 is a schematic diagram of a system 100 in which a communication method of an embodiment of the present application can be applied. As shown in FIG. 1, the system 100 includes an access network device 102, which may include one antenna or multiple antennas, such as

antennas

104, 106, 108, 110, 112, and 114. In addition, access network device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include multiple components associated with signal transmission and reception (eg, processor, modulator, complex) Consumer, demodulator, demultiplexer or antenna, etc.).

Access network device 102 can communicate with a plurality of terminal devices, such as terminal device 116 and terminal device 122. However, it will be appreciated that the access network device 102 can communicate with any number of terminal devices similar to the terminal device 116 or the terminal device 122.

Terminal devices

116 and 122 may be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communicating over wireless communication system 100. device.

As shown in FIG. 1, terminal device 116 is in communication with

antennas

112 and 114, wherein

antennas

112 and 114 transmit information to terminal device 116 over a forward link (also referred to as downlink) 118 and through the reverse link (also Information referred to as uplink 120 receives information from terminal device 116. In addition, terminal device 122 is in communication with

antennas

104 and 106, wherein

antennas

104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

For example, in a Frequency Division Duplex (FDD) system, for example, forward link 118 can use a different frequency band than reverse link 120, and forward link 124 can be used differently than reverse link 126. Frequency band.

As another example, in a Time Division Duplex (TDD) system and a Full Duplex system, the forward link 118 and the reverse link 120 can use a common frequency band, a forward link 124, and a reverse link. Link 126 can use a common frequency band.

Each antenna (or set of antennas consisting of multiple antennas) and/or regions designed for communication is referred to as a sector of the access network device 102. For example, the antenna group can be designed to communicate with terminal devices in sectors of the coverage area of the access network device 102. The access network device can transmit signals to all of the terminal devices in its corresponding sector by single antenna or multi-antenna transmit diversity. In the process in which the access network device 102 communicates with the

terminal devices

116 and 122 via the

forward links

118 and 124, respectively, the transmit antenna of the access network device 102 can also utilize beamforming to improve the

forward links

118 and 124. Signal to noise ratio. In addition, the access network device 102 utilizes beamforming to selectively distribute the

terminal devices

116 and 122 in the associated coverage area as compared to the manner in which the access network device transmits signals to all of its terminal devices through single antenna or multi-antenna transmit diversity. When transmitting a signal, mobile devices in neighboring cells are subject to less interference.

At a given time, the access network device 102, the terminal device 116, or the terminal device 122 may be a wireless communication transmitting device and/or a wireless communication receiving device. When transmitting data, the wireless communication transmitting device can encode the data for transmission. In particular, the wireless communication transmitting device may acquire (eg, generate, receive from other communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be included in a transport block (or multiple transport blocks) of data that may be segmented to produce multiple code blocks.

In addition, the communication system 100 can be a PLMN network, a D2D network, an M2M network, an IoT network, or other networks. FIG. 1 is only a simplified schematic diagram of an example, and the network may also include other access network devices, which are not shown in FIG.

Also, although not shown, the communication system 100 also includes a core network device communicatively coupled to the access network device 102.

The communication method of the embodiment of the present application will be described in detail below with reference to FIG. 2 and FIG. 3.

2 shows a process of transmitting data #c (ie, an example of second data) between the network device #A (for example, an access network device) and the terminal device #A, that is, the communication method 200.

Among them, the data #c is the data that the network device #A transmits to the terminal device #A at the time #3.

Further, a plurality of data transmitted by the network device #A before the time #3 are buffered in the buffer of the terminal device #A before the time #3.

First, the data transmission process of the network device #A and the terminal device #A before the time #3 will be described by taking the transmission process of the data #a as an example.

The application layer #a can be installed in the application layer of the terminal device #A, and the application #a can perform the action corresponding to the data #a after inputting the data #a. For example, the terminal device #A can be an industrial robot. The data #a may be an operation command for controlling the motion of the robot. Therefore, the application #a can control the robot to perform the operation indicated by the operation command after inputting the data #a, and it should be understood that the terminal device #A listed above The specific example is merely an exemplary description, and the present application is not limited thereto. The terminal device #A may also be a terminal having various communication functions, such as a mobile phone or a smart home appliance, and capable of installing an application and implementing a function through the application. device.

At S210, network device #A can acquire the data #a.

For example, the server of the application #a can communicate with the network device #A (for example, a wired communication connection or a wireless communication connection). Thus, the server can send data #a to network device #A. Moreover, the data #a may be input to the server by the designer of the operation instruction, or the server may generate the data #a based on a preset algorithm, which is not specifically limited.

Alternatively, the data #a may be input to the network device #A by a designer of the operation instruction.

Alternatively, the network device #A may also generate the data #a based on a preset algorithm.

It should be understood that the above-listed network device #A acquisition data #a method and process are merely exemplary, and the application is not limited thereto.

The data #a may be data that the terminal device #A needs to submit to the application layer at time #1.

By way of example and not limitation, in the embodiment of the present application, the network device #A can determine the time #1 in the following manner.

Specifically, the server of the application #a can communicate with the network device #A (for example, a wired communication connection or a wireless communication connection).

Thus, the server can transmit the indication information of the time #1 to the network device #A, that is, the network device #A can determine the time #1 according to the instruction from the server.

As an example and not by way of limitation, the time #1 may be input to the server by a designer of the operation instruction, or the server may also calculate the time #1 based on a preset algorithm, and omitting the same or similar situation instruction of.

It should be understood that the manner in which the network device #A enumerated above determines the time #1 is merely an exemplary description, and the present application is not limited thereto. For example, the administrator or the designer of the operation instruction may input the information of the time #1 to The network device #A, and thus, the network device #A can determine the time #1 based on the input information.

It should be noted that the process of determining the data #a and the time #1 by the network device #A may be performed simultaneously or in different steps, and the present application is not particularly limited.

At S210, network device #A may transmit data #a to terminal device #A at time #2, wherein the time #2 may be before the time #1.

Thereby, the terminal device #A can receive the data #a before the time #1, and can save the data #a to the buffer of the terminal device #A, hereinafter, for the sake of easy understanding and explanation, the terminal device# The cache space for storing data #a in the cache of A is written as: cache space #a.

Alternatively, the terminal device #A may transmit the related information of the cache space #a (for example, the size and the start position of the cache space #a) to the network device #A.

Moreover, in the embodiment of the present application, the network device #A can record related information of the data #a.

The related information of the data #a may include at least one of the following information:

1. Information on the size of data #a

Here, the "size of data #a" may refer to the number of bits included in the data #a, or "the size of the data #a" may refer to the size of the buffer space required for the data #a.

2. Information on the mapping relationship between data #a and time #1

Specifically, the information of the mapping relationship between the data #a and the time #1 can be used to indicate that the data #a needs to be submitted to the application layer by the terminal device #A at the time #1.

3. Data #a priority information

In the embodiment of the present application, the priority of the data may be used to indicate the urgency or importance of the data.

As an example and not by way of limitation, in the embodiment of the present application, the priority of the data may be determined based on the service to which the data belongs, for example, if a certain data is used for immediate control of the terminal device, or If necessary, you can determine that the priority of the data is high priority.

Accordingly, if the data only needs to be stored by the terminal device, it can be determined that the priority of the data is high priority

By way of example and not limitation, in the embodiment of the present application, the network device #A can determine the priority of the data #a in the following manner.

Thus, the server can transmit the indication information of the priority of the data #a to the network device #A, that is, the network device #A can determine the priority of the data #a according to the instruction from the server.

As an example and not by way of limitation, the priority of the data #a may be input to the server by the designer of the operation instruction, or the server may also calculate the priority of the data #a based on a preset algorithm. Explanations of the same or similar cases are omitted.

It should be understood that the manner in which the network device #A enumerated above determines the priority of the data #a is merely an exemplary description, and the present application is not limited thereto, for example, the administrator or the designer of the operation instruction may use the data #a The priority information is input to the network device #A, whereby the network device #A can determine the priority of the data #a based on the input information.

It should be noted that the process of determining the priority of the data #a, the data #a, and the time #1 by the network device #A may be performed simultaneously or in different steps, and the present application is not particularly limited.

In addition, in the embodiment of the present application, the priority of the data may be determined according to at least one of the following parameters.

Parameter 1. Data transmission delay

Specifically, in the embodiment of the present application, (for example, the network device #A) may determine the priority of the data according to the transmission delay of a certain data, for example, if the transmission delay of the data is smaller, the data is The higher the priority.

By way of example and not limitation, for data #n and data #m, if the transmission delay of data #n is smaller than the transmission delay of data #n, it can be determined that the priority of data #n is higher than the priority of data #m.

The “data transmission delay” may refer to a transmission delay in the actual transmission process of the data, or “the transmission delay of the data” may refer to a transmission delay required by the data (or the service to which the data belongs). This application is not specifically limited.

Moreover, by way of example and not limitation, in the embodiment of the present application, the transmission delay of the data may be determined according to a Quality of Service Class Identifier (QCI) of the bearer to which the data belongs.

Parameter 2. Data transmission reliability

Specifically, in the embodiment of the present application, (for example, the network device #A) may determine the priority of the data according to the transmission reliability of a certain data, for example, if the transmission reliability of the data is higher, the The higher the priority of the data.

By way of example and not limitation, for data #n and data #m, if the transmission reliability of data #n is higher than the transmission reliability of data #n, it can be determined that the priority of data #n is higher than the priority of data #m .

The “data transmission reliability” may refer to the transmission reliability during the actual transmission of the data, or “the data transmission delay” may refer to the transmission reliability required by the data (or the service to which the data belongs). This application is not specifically limited.

Moreover, as an example and not limitation, in the embodiment of the present application, the transmission reliability of the data may be determined according to a Quality of Service Class Identifier (QCI) of the bearer to which the data belongs.

Alternatively, in the embodiment of the present application, the transmission reliability of the data may also be determined according to the quality of the channel on which the data is carried.

Parameter 3. Data transmission jitter

Specifically, in the embodiment of the present application, (for example, the network device #A) may determine the priority of the data according to the transmission jitter of a certain data, for example, if the transmission jitter of the data is smaller, the data is The higher the priority.

By way of example and not limitation, for data #n and data #m, if the transmission jitter of data #n is lower than the transmission jitter of data #n, it can be determined that the priority of data #n is higher than the priority of data #m.

The “transmission jitter of the data” may refer to the transmission jitter during the actual transmission of the data, or “the transmission delay of the data” may refer to the transmission jitter required by the data (or the service to which the data belongs). It is not particularly limited.

Moreover, as an example and not limitation, in the embodiment of the present application, the transmission jitter of the data may be determined according to a Quality of Service Class Identifier (QCI) of the bearer to which the data belongs.

Parameter 4. Time when data needs to be submitted to the application layer

Specifically, in the embodiment of the present application, (for example, network device #A) may determine the priority of the data according to the time when a certain data needs to be submitted to the application layer, for example, if the data needs to be submitted to the application layer. The higher the priority, the higher the priority of the data.

By way of example and not limitation, for data #n and data #m, if data #n needs to be submitted to the application layer later than when data #m needs to be submitted to the application layer, it can be determined that data #n has a higher priority The priority of data #m.

It should be understood that the methods for determining the priority of the data listed above are merely exemplary descriptions, and the present application is not particularly limited thereto, and other methods capable of sorting data according to certain rules fall within the protection scope of the present application. For example, in the embodiment of the present application, the priority of the data may also be determined according to the logical channel on which the data is carried.

Further, the above parameters 1 to 4 may be used singly or in combination, and the present application is not particularly limited.

For example, in the embodiment of the present application, the priority relationship between the two data may be determined based on the parameter 1. If the two data determined based on the parameter 1 have the same priority, that is, the transmission delays of the two are the same, the method may be further based on Parameter 4 determines the priority of the two data, that is, for the two data with the same transmission delay, it can be determined that the party that needs to submit to the application layer later has a lower priority.

4. Data #a information on the storage location in the terminal device #A

By way of example and not limitation, in the embodiment of the present application, the network device #A may determine the storage location of the data #a in the terminal device #A based on at least one of the following manners.

Way a

Specifically, in the embodiment of the present application, the terminal device #A can report the size of the buffer space of the terminal device #A to the network device #A after accessing the network device #A, so that the network device #A can be based on The number of data transmitted to the terminal device #A and the transmission time calculate the storage location of the data #a in the buffer of the terminal device #A.

Mode b

Specifically, when the terminal device #A transmits the related information of the cache space #a to the network device #A (for example, the size and the start position of the cache space #a), the network device #A can report based on the terminal device #A. The information determines the storage location of data #a in terminal device #A.

5. Data #a is indexed in multiple data sent by network device #A to terminal device #A

By way of example and not limitation, the plurality of data may be respectively carried in different data packets, and an index of data carried in the data packet may be carried in each data packet, so that network device #A can be assigned to The index of each data is sent to the terminal device #A.

Thus, before time #3, the terminal device #A can receive a plurality of data including the data #a from the network device #A, and can cache a plurality of data including the data #a in the cache. .

It should be noted that, in the embodiment of the present application, the time at which the plurality of data cached by the terminal device #A needs to be submitted to the application layer (for example, the time #1 described above) may be located before the time #3, or may be located after the time #3. This application is not specifically limited.

That is, before time #3, a plurality of candidate data are stored in the terminal device #A.

Here, the "alternative data" may refer to data that the terminal device #A receives from the network device #A and is cached in the cache space and has not yet submitted to the application layer.

Next, the operation performed by the network device #A when determining that it is necessary to transmit the data #c to the terminal device #A at the time #3 will be described in detail.

Here, the data #c is data that needs to be submitted to the application layer by the terminal device #A at the time #4, and the time #4 is located after the time #3. Therefore, the data #c needs to be cached in the cache space of the terminal device #A.

Since the candidate data is already cached in the cache space of the terminal device #A, there may be a case where the current available cache space of the terminal device #A (that is, the cache space where no data is stored) cannot satisfy the storage requirement of the data #c.

Therefore, in the embodiment of the present application, at S220, the network device #A may determine the data #b from the candidate data, or determine the cache space for storing the data #b (ie, an example of the first cache space) In the following, for ease of understanding and explanation, it is recorded as cache space #b). And, the network device #A can instruct the terminal device #A to delete the data stored in the cache space #b (i.e., data #b), whereby the terminal device #A can store the portion of the data #c in the cache space #b. Or all, below, the process will be described in detail.

By way of example and not limitation, the network device may determine data #b or cache space #b based on the following manner.

Mode 1

The network device #A can determine the size of the buffer space required for the data #c (hereinafter, referred to as a target cache space for ease of understanding and differentiation) according to the size of the data #c (for example, the number of bits included in the data #c).

The network device #A can determine the size of the data to be deleted (ie, the data #b) according to the size of the current available cache space of the terminal device #A and the target cache space, or determine the buffer space to be emptied (ie, The size of the cache space #b).

By way of example and not limitation, in the embodiment of the present application, the sum of the size of the cache space #b determined by the network device #A and the size of the current available cache in the terminal device #A may be greater than or equal to the size of the target cache space. .

Alternatively, in the embodiment of the present application, the size of the cache space #b determined by the network device #A may be greater than or equal to the size of the target cache space.

In addition, it should be noted that the data #b may be any data in the candidate data, or the cache space #b may be any cache space in the cache space occupied by the candidate data, as long as the cache space can be made. The size of #b can satisfy the above conditions.

Next, a method and a procedure for determining the size of the current available cache space of the terminal device #A by the network device #A will be described in detail.

In the embodiment of the present application, the terminal device #A may send the indication information #2 (ie, an example of the second indication information) to the network device #A, and the indication information #2 may be used to indicate the current available cache of the terminal device #A. The size of the space.

As an example and not by way of limitation, for example, the terminal device #A may periodically transmit the indication information #2 to the network device #A.

For another example, the terminal device #A can detect the size of the currently available space in real time or periodically, and when the size of the currently available space is less than or equal to the preset threshold #1 (ie, an example of the first threshold), to the network device # A sends the indication information #2.

For another example, the network device #A may transmit the indication information #1 (an example of the third indication information) to the terminal device #A before transmitting the data to the terminal device #A, the indication information #1 being used to indicate the terminal device # A transmits the indication information #2 to the network device #A, whereby the terminal device #A can transmit the instruction information #2 to the network device #A based on the instruction information #1.

Alternatively, the network device #A may also periodically transmit the indication information #1.

Mode 2

Network device #A can determine data #b based on the priority of data #c.

Specifically, in the embodiment of the present application, the network device #A may determine, in the candidate data, data having a lower priority than the data #c as the data #b.

Mode 3

Network device #A may determine data #b based on the priority of the candidate data.

Specifically, in the embodiment of the present application, the network device #A may determine the data with lower priority among the candidate data as the data #b.

Mode 4

The network device #A may determine the data #b based on the time at which each candidate data needs to be submitted to the application layer of the terminal device #A.

For example, the network device #A may determine data that is relatively late in the candidate data that needs to be submitted to the application layer as data #b. As an example and not a limitation, the data #b may be an alternative data that needs to be submitted to The latest data at the application layer.

The method and the process for the network device #A to determine the time at which each candidate data needs to be submitted to the application layer may be similar to the method and process for determining the time #2 of the network device. Here, in order to avoid redundancy, detailed description thereof is omitted.

It should be understood that the above modes 1, 2, and 3 may be used alone or in combination, and the present application is not particularly limited.

At S230, the network device #A may transmit the instruction information #3 to the terminal device #A (that is, an example of the first indication information).

The indication information #3 is used to instruct the terminal device #A to delete the data #b from the cache (specifically, the cache space #b).

Alternatively, the indication information #3 may include information of an index of the data #b.

Alternatively, the indication information #3 may include information on the starting position and size of the cache space #b.

Alternatively, the indication information #3 may include information of the size of the cache space #b.

Alternatively, the indication information #3 may include information of the size of the data #b.

Optionally, the indication information #3 may include a protocol layer to which the cache space #b belongs, and, by way of example and not limitation, the protocol layer to which the cache space #b belongs may be a PDCP layer, an RLC layer, and a MAC layer. Or a layer in the SDAP layer. Thereby, the terminal device #A can easily determine the data #b and the cache space #b based on the instruction information #3.

Also, by way of example and not limitation, the indication information #3 may be a PDCP Protocol Data Unit (PDU). That is, the indication information #3 may be information that is encapsulated or parsed at the PDCP layer. Moreover, as an example and not limitation, in this case, it is preferable that the buffer space #b belongs to the PDCP layer, so that the terminal device can further determine that the buffer space #b belongs to the PDCP layer when determining that the indication information #3 is a PDCP PDU, thereby The signaling overhead for indicating the protocol layer to which the cache space #b belongs can be saved.

Alternatively, the indication information #3 may be an RLC PDU. That is, the indication information #3 may be information that is encapsulated or parsed at the RLC layer. Moreover, as an example and not limitation, in this case, it is preferable that the buffer space #b belongs to the RLC layer, so that the terminal device can further determine that the cache space #b belongs to the RLC layer when determining that the indication information #3 is the RLC PDU, thereby The signaling overhead for indicating the protocol layer to which the cache space #b belongs can be saved.

Alternatively, the indication information #3 may be a MAC Control Unit (CE). That is, the indication information #3 may be information that is encapsulated or parsed at the MAC layer. Moreover, as an example and not limitation, in this case, it is preferable that the cache space #b belongs to the MAC layer, so that the terminal device can further determine that the cache space #b belongs to the MAC layer when determining that the indication information #3 is the MAC CE, thereby The signaling overhead for indicating the protocol layer to which the cache space #b belongs can be saved.

At S240, the terminal device #A may delete the data #b from the cache space #b based on the instruction information #3.

At S250, network device #A may transmit data #c to terminal device #A at time #3.

At S260, the terminal device #A may buffer the data #c in the cache space #b, and at time #4, submit the data #c to the application layer of the terminal device #A.

Alternatively, at S270, the network device #A may transmit the data #b again to the terminal device #A.

It should be noted that the above data #b and data #a may be the same data or different data, and the present application is not particularly limited.

FIG. 3 shows a process of transmitting data #z (ie, an example of the first data) between the network device #B (for example, the access network device) and the terminal device #B, that is, the communication method 300.

Among them, the data #z is data that the terminal device #B transmits to the network device #B at the time #c.

Further, a plurality of data transmitted by the network device #B before the time #c are buffered in the buffer of the terminal device #B before the time #c.

First, the data transmission process of the network device #B and the terminal device #B before the time #c will be described by taking the transmission process of the data #x as an example.

The application layer #x may be installed in the application layer of the terminal device #B, and the application #x can perform the action corresponding to the data #x after inputting the data #x. For example, the terminal device #B can be an industrial robot. The data #x may be an operation instruction for controlling the motion of the robot, so that the application #x can control the robot to perform the operation indicated by the operation instruction after inputting the data #x, and it should be understood that the terminal device #B enumerated above The specific example is merely an illustrative example, and the present application is not limited thereto. The terminal device #B may also be a terminal having various communication functions, such as a mobile phone or a smart home appliance, and capable of installing an application and implementing a function through the application. device.

At S310, network device #B can acquire the data #x.

For example, the server of the application #x can be in communication connection with the network device #B (for example, a wired communication connection or a wireless communication connection). Thus, the server can send data #x to network device #B. Moreover, the data #x may be input to the server by the designer of the operation instruction, or the server may generate the data #x based on a preset algorithm, which is not specifically limited.

Alternatively, the data #x may be input to the network device #B by the designer of the operation instruction.

Alternatively, the network device #B may also generate the data #x based on a preset algorithm.

It should be understood that the above-listed network device #B acquisition data #x method and process are merely exemplary, and the application is not limited thereto.

The data #x may be data that the terminal device #B needs to submit to the application layer at the time #a.

By way of example and not limitation, in the embodiment of the present application, the network device #B can determine the time #a in the following manner.

Specifically, the server of the application #x can communicate with the network device #B (for example, a wired communication connection or a wireless communication connection).

Thus, the server can transmit the indication information of the time #a to the network device #B, that is, the network device #B can determine the time #a according to the instruction from the server.

As an example and not by way of limitation, the time #a may be input to the server by a designer of the operation instruction, or the server may also calculate the time #a based on a preset algorithm, and omitting the same or similar situation instruction of.

It should be understood that the manner in which the network device #B enumerated above determines the time #a is merely an exemplary description, and the present application is not limited thereto. For example, the administrator or the designer of the operation instruction may input the information of the time #a to The network device #B, whereby the network device #B can determine the time #a based on the input information.

It should be noted that the process of determining the data #x and the time #a by the network device #B may be performed simultaneously or in different steps, and the present application is not particularly limited.

And, at S310, the network device #B can transmit the data #x to the terminal device #B at time #b, wherein the time #b can be before the time #a.

Thereby, the terminal device #B can receive the data #x before the time #a, and can save the data #x to the cache of the terminal device #B, hereinafter, for the sake of easy understanding and explanation, the terminal device# The cache space for storing data #x in the cache of B is written as: cache space #x.

Alternatively, the terminal device #B may transmit the related information of the cache space #x (for example, the size and the start position of the cache space #x) to the network device #B.

Moreover, in the embodiment of the present application, the network device #B can record related information of the data #x.

The information about the data #x may include at least one of the following information:

1. Information on the size of data #x

Here, the "size of data #x" may refer to the number of bits included in the data #x, or "the size of the data #x" may refer to the size of the buffer space required for the data #x.

2. Information on the mapping relationship between data #x and time #a

Specifically, the information of the mapping relationship between the data #x and the time #a can be used to indicate that the data #x needs to be submitted to the application layer by the terminal device #B at the time #a.

3. Data #x priority information

By way of example and not limitation, in the embodiment of the present application, the network device #B can determine the priority of the data #x in the following manner.

Thus, the server can transmit the indication information of the priority of the data #x to the network device #B, that is, the network device #B can determine the priority of the data #x according to the instruction from the server.

As an example and not by way of limitation, the priority of the data #x may be input to the server by the designer of the operation instruction, or the server may also calculate the priority of the data #x based on a preset algorithm. Explanations of the same or similar cases are omitted.

It should be understood that the manner in which the network device #B enumerated above determines the priority of the data #x is merely an exemplary description, and the present application is not limited thereto, for example, the administrator or the designer of the operation instruction may use the data #x The priority information is input to the network device #B, whereby the network device #B can determine the priority of the data #x based on the input information.

It should be noted that the process of determining the priority of the data #x, the data #x, and the time #a by the network device #B may be performed simultaneously or in different steps, and the present application is not particularly limited.

4. Data #x information on the storage location in terminal device #B

By way of example and not limitation, in the embodiment of the present application, the network device #B may determine the storage location of the data #x in the terminal device #B based on at least one of the following manners.

Way a

Specifically, in the embodiment of the present application, after accessing the network device #B, the terminal device #B can report the size of the buffer space of the terminal device #B to the network device #B, so that the network device #B can be based on The number of data transmitted to the terminal device #B and the transmission time calculate the storage location of the data #x in the cache of the terminal device #B.

Mode b

Specifically, when the terminal device #B transmits the related information of the cache space #x to the network device #B (for example, the size and the start position of the cache space #x), the network device #B can report based on the terminal device #B. The information determines the storage location of data #x in terminal device #B.

5. Data #x is indexed in multiple data sent by network device #B to terminal device #B

By way of example and not limitation, the plurality of data may be respectively carried in different data packets, and an index of data carried in the data packet may be carried in each data packet, so that network device #B can be assigned to The index of each data is sent to the terminal device #B.

Thus, before time #c, the terminal device #B can receive a plurality of data including the data #x from the network device #B, and can cache a plurality of data including the data #x in the cache. .

It should be noted that, in the embodiment of the present application, the time at which the plurality of data cached by the terminal device #B needs to be submitted to the application layer (for example, the time #a described above) may be located before the time #3, or may be located after the time #3. This application is not specifically limited.

That is, a plurality of candidate data are stored in the terminal device #B before the time #c.

Here, the "alternative data" may refer to data that the terminal device #B receives from the network device #B and is buffered in the cache space and has not yet submitted to the application layer.

Next, the operation of the terminal device #B when determining that it is necessary to transmit the data #z to the network device #B at the time #c will be described in detail.

Here, the data #z is data that needs to be submitted to the application layer by the terminal device #B at the time #d, and the time #d is located after the time #c. Therefore, the data #z needs to be cached in the cache space of the terminal device #B.

Since the candidate data is already cached in the cache space of the terminal device #B, there may be a case where the current available cache space of the terminal device #B (that is, the cache space where no data is stored) cannot satisfy the storage requirement of the data #z.

Therefore, in the embodiment of the present application, at S320, the terminal device #B may determine the data #y from the candidate data, or determine the cache space for storing the data #y (ie, an example of the first cache space) In the following, for ease of understanding and explanation, it is noted that the cache space #y). And, the terminal device #B can delete the data (ie, data #y) stored in the cache space #y, so that the terminal device #B can store part or all of the data #z in the cache space #y, below, The process is described in detail.

As an example and not by way of limitation, the terminal device may determine data #y or cache space #y based on the following manner.

Mode 1

The terminal device #B can determine the size of the cache space required for the data #z (hereinafter, referred to as a target cache space for ease of understanding and differentiation) according to the size of the data #z (for example, the number of bits included in the data #z).

The terminal device #B can determine the size of the data to be deleted (ie, the data #y) according to the size of the current available cache space of the terminal device #B and the target cache space, or determine the buffer space that needs to be cleared (ie, The size of the cache space #y).

By way of example and not limitation, in the embodiment of the present application, the sum of the size of the cache space #y determined by the terminal device #B and the current available cache size in the terminal device #B may be greater than or equal to the size of the target cache space. .

Alternatively, in the embodiment of the present application, the size of the cache space #y determined by the terminal device #B may be greater than or equal to the size of the target cache space.

In addition, it should be noted that the data #y may be any data in the candidate data, or the cache space #y may be any cache space in the cache space occupied by the candidate data, as long as the cache space can be made. The size of #y can satisfy the above conditions.

Mode 2

The terminal device #B can determine the data #y based on the priority of the data #z.

Specifically, in the embodiment of the present application, the terminal device #B may determine, in the candidate data, data having a lower priority than the data #z as the data #y.

Mode 3

The terminal device #B can determine the data #y based on the time at which each candidate data needs to be submitted to the application layer of the terminal device #B.

For example, the terminal device #B may determine data that is relatively late in the candidate data that needs to be submitted to the application layer as data #y. As an example and not a limitation, the data #y may be an alternative data that needs to be submitted to The latest data at the application layer.

It should be understood that the above modes 1, 2, and 3 may be used alone or in combination. The present application is not particularly limited.

At S330, the terminal device #B may transmit the data #z stored in the cache space #y to the network device at time #c.

At S340, the terminal device #B may transmit the instruction information #4 to the network device #B (that is, an example of the retransmission instruction information).

The indication information #4 is used to instruct the network device #B to resend the data #y.

Alternatively, the indication information #4 may include information of an index of the data #y.

Alternatively, the indication information #4 may include information on the starting position and size of the cache space #y.

Alternatively, the indication information #4 may include information of the size of the cache space #y.

Alternatively, the indication information #4 may include information of the size of the data #y.

Thereby, the network device #B can easily determine the data #y based on the indication information #4.

At S350, the network device #B may resend the data #y to the terminal device #B based on the indication information #4.

FIG. 4 is a schematic diagram 1 of a communication device 10 according to an embodiment of the present disclosure. As shown in FIG. 4, the device 10 may be a terminal device, or may be a chip or a circuit, such as a chip that can be disposed on a terminal device or Circuit.

The apparatus 10 can include a processor 11 (i.e., an example of a processing unit) and a memory 12. The memory 12 is configured to store instructions for executing the instructions stored in the memory 12 to enable the apparatus 20 to implement a terminal device (eg, the terminal device #A described above) in a corresponding method as in FIG. 2 or FIG. Or the steps performed by terminal device #B).

Further, the device 10 may further include an input port 13 (ie, an example of a communication unit) and an output port 14 (ie, another example of a communication unit). Further, the processor 11, memory 12, input port 13 and output port 14 can communicate with one another via internal connection paths to communicate control and/or data signals. The memory 12 is configured to store a computer program, and the processor 11 can be used to call and run the computer program from the memory 12 to control the input port 13 to receive signals, and control the output port 14 to send signals to complete the terminal device in the above method. A step of. The memory 12 can be integrated in the processor 11 or can be provided separately from the processor 11.

Optionally, if the device 10 is a communication device, the input port 13 may be a receiver, and the output port 14 may be a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 10 is a chip or a circuit, the input port 13 is an input interface, and the output port 14 is an output interface.

Optionally, if the device 10 is a chip or a circuit, the device 10 may not include the memory 12, and the processor 11 may read an instruction (program or code) in the memory external to the chip to implement the foregoing 2 or the function of the terminal device in the corresponding method in FIG.

As an implementation manner, the functions of the input port 13 and the output port 14 can be implemented by a dedicated chip through a transceiver circuit or a transceiver. The processor 11 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.

As another implementation manner, the terminal device provided by the embodiment of the present application may be implemented by using a general-purpose computer. The program code that implements the functions of the processor 11, the input port 13, and the output port 14 is stored in the memory 12, and the general purpose processor implements the functions of the processor 11, the input port 13, and the output port 14 by executing the code in the memory 12.

The functions and actions of the modules or units in the communication device 10 listed above are merely exemplary. The modules or units in the communication device 10 may be used to execute the terminal device in the above method 200 or 300 (for example, the above terminal device # Each operation or processing executed by A or terminal device #B) is omitted here for avoiding redundancy.

For the concepts, explanations, detailed descriptions and other steps of the device 10 related to the technical solutions provided by the embodiments of the present application, refer to the descriptions of the foregoing methods or other embodiments, and no further details are provided herein.

FIG. 5 is a schematic diagram of a device 30 for communication according to an embodiment of the present disclosure. As shown in FIG. 5, the device 30 may be a network device, or may be a chip or a circuit, such as a network device. Chip or circuit inside.

The apparatus 30 can include a processor 31 (ie, an example of a processing unit) and a memory 32. The memory 32 is configured to store instructions for executing the instructions stored by the memory 32 to cause the apparatus 30 to implement the network device (eg, the network device #A described above) in the corresponding method of FIG. 2 or FIG. Or network device #B) steps performed.

Further, the device 30 may further include an input port 33 (ie, an example of a communication unit) and an output port 33 (ie, another example of the processing unit). Still further, the processor 31, memory 32, input port 33, and output port 34 can communicate with one another via internal connection paths to communicate control and/or data signals. The memory 32 is used to store a computer program. The processor 31 can be used to call and run the computer program from the memory 32 to control the input port 33 to receive signals, and control the output port 34 to send signals to complete the terminal in the method 200. The steps of the device. The memory 32 can be integrated in the processor 31 or can be provided separately from the processor 31.

The control input port 33 receives the signal, and the control output port 34 transmits a signal to complete the steps of the receiving end device in the above method. The memory 32 can be integrated in the processor 31 or can be provided separately from the processor 31.

Optionally, if the device 30 is a communication device, the input port 33 is a receiver, and the output port 34 is a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 30 is a chip or a circuit, the input port 33 is an input interface, and the output port 34 is an output interface.

Optionally, if the device 30 is a chip or a circuit, the device 30 may not include the memory 32, and the processor 31 may read an instruction (program or code) in the memory external to the chip to implement the foregoing 2 or the function of the network device in the corresponding method in FIG.

As an implementation, the functions of the input port 33 and the output port 34 can be implemented by a dedicated chip through a transceiver circuit or a transceiver. The processor 31 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.

As another implementation manner, the manner of using a general-purpose computer can be considered to implement the receiving end device provided by the embodiment of the present application. The program code that implements the functions of the processor 31, the input port 33, and the output port 34 is stored in a memory, and the general purpose processor implements the functions of the processor 31, the input port 33, and the output port 34 by executing code in the memory.

The functions and operations of the modules or units in the communication device 30 listed above are merely exemplary. Each module or unit in the communication device 30 may be used to perform various actions or processes performed by the network device in the foregoing method 200 or 300. In the process, detailed descriptions are omitted here to avoid redundancy.

For the concepts, explanations, detailed descriptions and other steps of the device 30 related to the technical solutions provided by the embodiments of the present application, refer to the descriptions of the foregoing methods or other embodiments, and no further details are provided herein.

FIG. 6 is a schematic structural diagram of a terminal device 20 provided by the present application, which can be used to implement the functions of the terminal device in the method shown in FIG. 2 or FIG. The terminal device 20 can be applied to the system shown in FIG. For the convenience of explanation, FIG. 6 shows only the main components of the terminal device. As shown in FIG. 6, the terminal device 20 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used for processing the communication protocol and the communication data, and controlling the entire terminal device, executing the software program, and processing the data of the software program, for example, in the embodiment of the indication method for supporting the terminal device to perform the foregoing transmission precoding matrix. The action described. The memory is primarily used to store software programs and data, such as the codebooks described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. The control circuit together with the antenna can also be called a transceiver, and is mainly used for transmitting and receiving RF signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user.

After the terminal device is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When the data needs to be transmitted by wireless, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves. When data is transmitted to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that FIG. 4 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control and execute the entire terminal device. A software program that processes data from a software program. The processor in FIG. 4 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network standards, and the terminal device may include a plurality of central processors to enhance its processing capabilities, and various components of the terminal devices may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

Exemplarily, in the embodiment of the present application, the antenna and control circuit having the transceiving function can be regarded as the transceiving unit 201 of the terminal device 20, and the processor having the processing function is regarded as the processing unit 202 of the terminal device 20. As shown in FIG. 6, the terminal device 20 includes a transceiver unit 201 and a processing unit 202. The transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like. Alternatively, the device for implementing the receiving function in the transceiver unit 201 can be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 201 is regarded as a transmitting unit, that is, the transceiver unit 201 includes a receiving unit and a transmitting unit. Illustratively, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.

FIG. 7 is a schematic structural diagram of a network device (for example, an access network device) according to an embodiment of the present disclosure, which may be used to implement the functions of the network device in the method shown in FIG. 2 or FIG. For example, it can be a schematic diagram of a base station. As shown in FIG. 7, the network device (e.g., base station) can be applied to the system as shown in FIG. The network device 40 includes one or more radio frequency units, such as a remote radio unit (RRU) 401 and one or more baseband units (BBUs) (also referred to as digital units, DUs). 402. The RRU 401 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 4011 and a radio frequency unit 4012. The RRU 401 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for transmitting the signaling messages described in the foregoing embodiments to the terminal device. The BBU 402 portion is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 401 and the BBU 402 may be physically disposed together or physically separated, that is, distributed base stations.

The BBU 402 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 402 can be used to control the base station 40 to perform the operation procedure of the network device in the foregoing method embodiment.

In an example, the BBU 402 may be composed of one or more boards, and multiple boards may jointly support a single access standard radio access network (such as an LTE system or a 5G system), or may support different ones. Access to the standard wireless access network. The BBU 402 also includes a memory 4021 and a processor 4022. The memory 4021 is used to store necessary instructions and data. For example, the memory 4021 stores the codebook or the like in the above embodiment. The processor 4022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform an operation procedure about the network device in the foregoing method embodiment. The memory 4021 and the processor 4022 can serve one or more boards. That is, the memory and processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board.

In a possible implementation manner, with the development of System-on-chip (SoC) technology, all or part of the functions of the 402 part and the 401 part may be implemented by the SoC technology, for example, by a base station function chip. The base station function chip integrates a processor, a memory, an antenna interface and the like. The program of the base station related function is stored in the memory, and the processor executes the program to implement the related functions of the base station. Optionally, the base station function chip is also capable of reading a memory external to the chip to implement related functions of the base station.

It should be understood that the structure of the network device illustrated in FIG. 7 is only one possible form, and should not be construed as limiting the embodiments of the present application. This application does not preclude the possibility of other forms of base station architecture that may arise in the future.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, which includes the foregoing sending end device and receiving end device.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration. Application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory. The volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic randomness. Synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more sets of available media. The usable medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid state hard drive.

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application. A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again. In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A communication method, comprising:

Receiving, by the terminal device, the first indication information that is sent by the network device, where the first indication information is used to indicate that the terminal device deletes the first data from the cache, where the first data is sent by the network device to the terminal device Data, the first data is stored in a first cache space in the cache, and the first data has not been submitted to an application layer of the terminal device;

The terminal device deletes the first data from the cache according to the first indication information;

The terminal device receives second data sent by the network device, and stores part or all of the second data in the first cache space.
The communication method according to claim 1, wherein before the receiving, by the terminal device, the first indication information sent by the network device, the method further comprises:

Transmitting, by the terminal device, the second indication information to the network device, where the second indication information is used to indicate a size of a current available cache space in the cache, where the first data is according to the network device The second indication information is determined.
The communication method according to claim 2, wherein the second indication information is further used to indicate when the buffered data in the cache needs to be submitted to the application layer, and/or

The second indication information is further used to indicate a priority of data cached in the cache.
The communication method according to claim 2 or 3, wherein the transmitting, by the terminal device, the second indication information to the network device comprises:

The terminal device periodically sends the second indication information to the network device; and/or

The terminal device sends the second indication information to the network device when the size of the current available buffer space is less than or equal to a preset first threshold; and/or

After receiving the third indication information sent by the network device, the terminal device sends the second indication information to the network device, where the third indication information is used to indicate that the terminal device is to the network device. Send the second indication message.
The communication method according to any one of claims 2 to 4, wherein the first data is determined by the network device according to the related information of the second data, wherein

The related information of the second data includes information about a size of the second data, and a size of data currently available in the cache and the first cache space is greater than or equal to a size of the second data. Size, and / or

The related information of the second data includes information of a priority of the second data, and the priority of the second data is higher than a priority of the first data, or a priority of the second data The priority is the same as the first data.
The communication method according to any one of claims 1 to 5, wherein the communication method further comprises:

The terminal device receives the first data that is resent by the network device.
The communication method according to any one of claims 1 to 6, wherein the first indication information is further used to indicate a location of the first data in the cache, and/or

The first indication information is further used to indicate an index of the first data in the cached data, and/or

The first indication information is further used to indicate a size of the first data.
A communication method, comprising:

The network device sends the first indication information to the terminal device, where the first indication information is used to indicate that the terminal device deletes the first data from the cache, where the first data is data sent by the network device to the terminal device The first data is stored in a first cache space in the cache, and the first data is not yet submitted to an application layer of the terminal device;

The network device sends second data to the terminal device, and part or all of the second data is stored in the first cache space by the terminal device.
The communication method according to claim 8, wherein before the sending, by the network device, the first indication information to the terminal device, the method further includes:

The network device receives second indication information from the terminal device, where the second indication information is used to indicate a size of a current available cache space in the cache;

The network device determines the first data according to the second indication information.
The communication method according to claim 9, wherein the second indication information is further used to indicate when the buffered data in the cache needs to be submitted to the application layer, and/or

The second indication information is further used to indicate a priority of data cached in the cache.
The communication method according to claim 9 or 10, wherein the second means that the information is periodically sent by the terminal device; and/or

The second indication information is sent by the terminal device when determining that the size of the current available cache space is less than or equal to a preset first threshold; and/or

The second indication information is sent by the terminal device according to the third indication information received from the network device, where the third indication information is used to instruct the terminal device to send the second indication information to the network device. .
The communication method according to any one of claims 9 to 11, wherein before the network device sends the first indication information to the terminal device, the method further includes:

Determining, by the network device, the first data according to the related information of the second data, where

The related information of the second data includes information about a size of the second data, and a size of data currently available in the cache and the first cache space is greater than or equal to a size of the second data. Size, and / or

The related information of the second data includes information of a priority of the second data, and the priority of the second data is higher than a priority of the first data, or a priority of the second data The priority is the same as the first data.
The communication method according to any one of claims 8 to 12, wherein the communication method further comprises:

The network device resends the first data to the terminal device.
The communication method according to any one of claims 8 to 13, wherein the first indication information is further used to indicate a location of the first data in the cache, and/or

The first indication information is further used to indicate an index of the first data in the cached data, and/or

The first indication information is further used to indicate a size of the first data.
A communication method, comprising:

The terminal device deletes the second data from the cache of the terminal device when the first data needs to be sent to the network device, where the second data is data received by the terminal device from the network device, the second data Stored in the first cache space in the cache, the second data has not been submitted to the application layer of the terminal device;

The terminal device stores part or all of the first data in the first cache space, and sends the first data to the network device at a preset sending moment;

The terminal device sends retransmission indication information to the network device, where the retransmission indication information is used to instruct the network device to resend the second data;

The terminal device receives second data that is retransmitted by the network device according to the retransmission indication information.
The communication method according to claim 15, wherein the method further comprises: before deleting the second data from the cache of the terminal device, the method further comprising:

The terminal device determines the second data according to the reference information, where the reference information is used to indicate at least one of the following parameters:

a size of the first cache space, a size of a current available cache space in the cache, a priority of the first data, a priority of data cached in the cache, the sending time, and the cache The stored time that the terminal device receives data from the network device needs to be submitted to the application layer of the terminal device.
The communication method according to claim 16, wherein a size of data that can be stored in the currently available cache space and the first cache space in the cache is greater than or equal to a size of the first data, and/or

The first data has a higher priority than the second data, and/or

The moment when the second data needs to be submitted to the application layer of the terminal device is after the sending moment.
A communication method, comprising:

The network device receives the first data that is sent by the terminal device at a preset sending time, where part or all of the first data is stored in the first buffer space before the sending time, and the first buffer space is in the storage The first data is used to store second data, the second data is data received by the terminal device from the network device, and the second data has not been submitted to an application layer of the terminal device, The second data is that the terminal device is deleted by the terminal device from the first cache space when it is determined that the first data needs to be sent;

Receiving, by the network device, the retransmission indication information, where the retransmission indication information is used to instruct the network device to resend the second data;

The network device resends the second data to the terminal device according to the retransmission indication information.
The communication method according to claim 18, wherein the second data is determined by the terminal device according to reference information, wherein the reference information is used to indicate at least one of the following parameters:

a size of the first cache space, a size of a current available cache space in the cache, a priority of the first data, a priority of data cached in the cache, the sending time, and the cache The stored time that the terminal device receives data from the network device needs to be submitted to the application layer of the terminal device.
The communication method according to claim 19, wherein a size of data that can be stored in the currently available cache space and the first cache space in the cache is greater than or equal to a size of the first data, and/or

The first data has a higher priority than the second data, and/or

The moment when the second data needs to be submitted to the application layer of the terminal device is after the sending moment.
A communication device, comprising:

a communication unit, configured to receive first indication information that is sent by the network device, where the first indication information is used to instruct the communication device to delete the first data from the cache, where the first data is sent by the network device to the Data of the communication device, the first data is stored in a first cache space in the cache, and the first data has not been submitted to an application layer of the communication device;

a processing unit, configured to delete the first data from the cache according to the first indication information;

The communication unit is further configured to receive second data sent by the network device, and store part or all of the second data in the first cache space.
The communication device according to claim 21, wherein the communication unit is further configured to send second indication information to the network device, where the second indication information is used to indicate a current available cache space in the cache. The size of the first data is determined by the network device according to the second indication information.
The communication device according to claim 22, wherein the second indication information is further used to indicate when the buffered data in the cache needs to be submitted to the application layer, and/or

The second indication information is further used to indicate a priority of data cached in the cache.
A communication device according to claim 22 or 23, characterized in that

The communication unit is specifically configured to periodically send the second indication information to the network device; and/or

The communication unit is specifically configured to send the second indication information to the network device when a size of a current available buffer space is less than or equal to a preset first threshold; and/or

The communication unit is configured to: after receiving the third indication information sent by the network device, send the second indication information to the network device, where the third indication information is used to indicate that the communication device is located The network device sends the second indication information.
The communication device according to any one of claims 22 to 24, wherein the first data is determined by the network device according to the related information of the second data, wherein

The related information of the second data includes information about a size of the second data, and a size of data currently available in the cache and the first cache space is greater than or equal to a size of the second data. Size, and / or

The related information of the second data includes information of a priority of the second data, and the priority of the second data is higher than a priority of the first data, or a priority of the second data The priority is the same as the first data.
The communication device according to any one of claims 21 to 25, wherein the communication unit is further configured to receive the first data retransmitted by the network device.
The communication device according to any one of claims 21 to 26, wherein the first indication information is further used to indicate a location of the first data in the cache, and/or

The first indication information is further used to indicate an index of the first data in the cached data, and/or

The first indication information is further used to indicate a size of the first data.
A communication device, comprising:

a communication unit, configured to send the first indication information to the terminal device, where the first indication information is used to instruct the terminal device to delete the first data from the cache, where the first data is sent by the communication device to the terminal Data of the device, the first data is stored in a first cache space in the cache, and the first data is not yet submitted to an application layer of the terminal device;

The communication unit is further configured to send second data to the terminal device, and part or all of the second data is stored in the first cache space by the terminal device.
The communication device according to claim 28, wherein the communication unit is further configured to receive second indication information from the terminal device, where the second indication information is used to indicate a current available cache in the cache. The size of the space;

The communication device further includes:

And a processing unit, configured to determine the first data according to the second indication information.
The communication device according to claim 29, wherein the second indication information is further used to indicate when the buffered data in the cache needs to be submitted to the application layer, and/or

The second indication information is further used to indicate a priority of data cached in the cache.
The communication device according to claim 29 or 30, wherein said second means that the information is periodically transmitted by said terminal device; and/or

The second indication information is sent by the terminal device when determining that the size of the current available cache space is less than or equal to a preset first threshold; and/or

The second indication information is sent by the terminal device according to the third indication information received from the communication device, and the third indication information is used to instruct the terminal device to send the second indication information to the communication device. .
The communication device according to any one of claims 29 to 31, wherein the processing unit is specifically configured to determine the first data according to related information of the second data, wherein

The related information of the second data includes information about a size of the second data, and a size of data currently available in the cache and the first cache space is greater than or equal to a size of the second data. Size, and / or

The related information of the second data includes information of a priority of the second data, and the priority of the second data is higher than a priority of the first data, or a priority of the second data The priority is the same as the first data.
The communication device according to any one of claims 28 to 32, wherein the communication unit is further configured to resend the first data to the terminal device.
The communication device according to any one of claims 28 to 33, wherein the first indication information is further used to indicate a location of the first data in the cache, and/or

The first indication information is further used to indicate an index of the first data in the cached data, and/or

The first indication information is further used to indicate a size of the first data.
A communication device, comprising:

a processing unit, configured to delete second data from a cache of the communication device when the first data needs to be sent to the network device, where the second data is data received by the communication device from the network device, The second data is stored in a first cache space in the cache, the second data has not been submitted to an application layer of the communication device; and part or all of the first data is stored in the first cache space And transmitting the first data to the network device at a preset sending moment;

a communication unit, configured to send, to the network device, retransmission indication information, where the retransmission indication information is used to instruct the network device to resend the second data, and receive the network device according to the retransmission indication information Resend the second data.
The communication device according to claim 35, wherein the processing unit is further configured to determine the second data according to the reference information, wherein the reference information is used to indicate at least one of the following parameters:

a size of the first cache space, a size of a current available cache space in the cache, a priority of the first data, a priority of data cached in the cache, the sending time, and the cache The stored time at which the communication device receives data from the network device needs to be submitted to the application layer of the communication device.
The communication device according to claim 36, wherein a size of data currently available in the cache and the first cache space is greater than or equal to a size of the first data, and/or

The first data has a higher priority than the second data, and/or

The time at which the second data needs to be submitted to the application layer of the communication device is after the transmission time.
A communication device, comprising:

a communication unit, configured to receive first data that is sent by the terminal device at a preset sending time, where part or all of the first data is stored in the first buffer space before the sending time, where the first buffer space is Preserving the first data before storing the second data, the second data is data received by the terminal device from the communication device, and the second data has not been submitted to an application layer of the terminal device, where The second data is that the terminal device is deleted by the terminal device from the first cache space when determining that the first data needs to be sent;

The communication unit is further configured to receive, by the terminal device, retransmission indication information, where the retransmission indication information is used to instruct the communication device to resend the second data;

The communication unit is further configured to resend the second data to the terminal device according to the retransmission indication information.
The communication device according to claim 38, wherein the second data is determined by the terminal device according to the reference information, wherein the reference information is used to indicate at least one of the following parameters:

a size of the first cache space, a size of a current available cache space in the cache, a priority of the first data, a priority of data cached in the cache, the sending time, and the cache The stored time at which the terminal device receives data from the communication device needs to be submitted to the application layer of the terminal device.
The communication device according to claim 39, wherein a size of data currently available in the cache and the first cache space in the cache is greater than or equal to a size of the first data, and/or

The first data has a higher priority than the second data, and/or

The moment when the second data needs to be submitted to the application layer of the terminal device is after the sending moment.
A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, the computer program causing the communication device to perform the communication method according to any one of claims 1 to 20.
A computer program product, comprising: computer program code, when the computer program code is executed by a communication device, causing the communication device to perform the communication of any one of claims 1 to 20. method.