CN109644351B - Data processing method and device - Google Patents

Abstract

The embodiments of the present application provide a data processing method and device, which can avoid unnecessary cache overhead as much as possible. The method includes: starting a timer for limiting the buffering duration for a first packet data convergence protocol PDCP service data unit SDU; when the timer expires, controlling access to a first medium including the first PDCP SDU MAC data units are processed.

Description

Data processing method and device

technical field

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

Background technique

In the Long Term Evolution (LTE) system, when sending data, the sender will set the maximum number of retransmissions for the Media Access Control (MAC) data unit. During the number of retransmissions, the media access control (Media Access Control, MAC) data unit stored in the cache may be cleared.

Only when the maximum number of retransmissions is reached, the data in the cache is cleared, which will cause unnecessary cache overhead.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a data processing method and device, which can avoid unnecessary cache overhead as much as possible.

In a first aspect, a data processing method is provided, including:

Starting a timer for limiting the buffering duration for the first packet data convergence protocol PDCP service data unit SDU;

When the timer expires, the first medium access control MAC data unit including the first PDCP SDU is processed.

Therefore, in this embodiment of the present application, when the timer set for the PDCP SDU expires, the MAC data unit including the first PDCP SDU is processed, so as to avoid unnecessary buffering overhead as much as possible.

With reference to the first aspect, in a possible implementation manner of the first aspect, when the timer expires, processing the MAC data unit including the first PDCP SDU includes:

When the timer expires and the first MAC data unit is the first MAC SDU that has not been transmitted over the air interface, the first MAC SDU is discarded.

With reference to the first aspect or any of the above-mentioned possible implementations, in another possible implementation of the first aspect, when the timer expires, the first MAC including the first PDCP SDU is Data units are processed, including:

When the timer expires and the first MAC data unit is the first MAC protocol data unit PDU transmitted over the air interface, it is determined whether the first MAC PDU includes a second MAC PDU that is not the first PDCP SDU PDCP SDU;

The first MAC PDU is processed according to whether the first MAC PDU includes the second PDCP SDU.

With reference to the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, according to whether the first MAC PDU includes the second PDCP SDU, MAC PDUs are processed, including:

When the first MAC PDU does not include the second PDCP SDU, the first MAC PDU is discarded.

With reference to the first aspect or any of the above possible implementations thereof, in another possible implementation of the first aspect, the method further includes:

The maximum number of retransmissions set for the first MAC data unit is cleared.

With reference to the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, according to whether the first MAC PDU includes the second PDCP SDU, MAC PDUs are processed, including:

When the first MAC PDU includes the second PDCP SDU, the first MAC PDU is reserved for subsequent retransmission.

With reference to the first aspect or any of the above possible implementations thereof, in another possible implementation of the first aspect, when the timer expires, the method further includes:

The first PDCP SDU buffered at the PDCP layer is discarded.

With reference to the first aspect or any of the above possible implementations thereof, in another possible implementation of the first aspect, when the timer expires, the method further includes:

The RLC SDU including the first PDCP SDU buffered at the radio link control RLC layer is discarded.

In a second aspect, a data processing device is provided for executing the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the data processing device includes functional modules for executing the above-mentioned first aspect or the method in any possible implementation manner of the first aspect.

In a third aspect, a data processing device is provided, including a processor, a memory and a transceiver. The processor, the memory, and the transceiver communicate with each other through an internal connection path, and transmit control and/or data signals, so that the data processing device executes the first aspect or any possible implementation of the first aspect method in method.

In a fourth aspect, a computer-readable medium is provided for storing a computer program, wherein the computer program includes instructions for executing any one of the above-mentioned methods or any possible implementation manner.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform any one of the above methods or any of the methods in any possible implementations.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some of the drawings in the present application. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

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

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

FIG. 3 is a schematic block diagram of a data processing device according to an embodiment of the present application.

FIG. 4 is a schematic block diagram of a system chip according to an embodiment of the present application.

FIG. 5 is a schematic block diagram of a communication device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (referred to as "GSM") system, Code Division Multiple Access (Code Division Multiple Access, referred to as "CDMA") system , Wideband Code Division Multiple Access (WCDMA for short) system, General Packet Radio Service (General Packet RadioService, referred to as "GPRS"), Long Term Evolution (Long Term Evolution, referred to as "LTE") system , LTE frequency division duplex (Frequency Division data unit plex, referred to as "FDD") system, LTE time division duplex (TimeDivision data unit plex, referred to as "TDD"), universal mobile communication system (Universal MobileTelecommunication System, referred to as "" UMTS”), Worldwide Interoperability for Microwave Access (“WiMAX” for short) communication system or future 5G system, etc.

FIG. 1 shows a wireless communication system 100 to which an embodiment of the present application is applied. The wireless communication system 100 may include a network device 110 . The network device 110 may be a device that communicates with terminal devices. The network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices (eg, UEs) located within the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device can be a relay station, access point, in-vehicle device, wearable device, future Network-side equipment in a 5G network or network equipment in a future evolved public land mobile network (Public Land Mobile Network, PLMN).

The wireless communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110 . Terminal device 120 may be mobile or stationary. Optionally, the terminal equipment 120 may refer to an access terminal, a user equipment (User Equipment, UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, user agent, or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks, or terminal devices in future evolved PLMNs, etc.

Optionally, direct terminal (Device to Device, D2D) communication may be performed between the terminal devices 120 .

Optionally, the 5G system or network may also be referred to as a New Radio (New Radio, NR) system or network.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The application embodiments do not limit this.

Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

FIG. 2 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. The method 200 may optionally be applied to the system shown in Figure 1, but is not limited thereto. The method 200 includes at least some of the following.

In 210, the sender starts a timer for limiting the buffering duration for the first Packet Data Convergence Protocol (PDCP) serving data unit (Serving Data Unit, SDU).

Specifically, at the PDCP layer, the transmitting end may respectively start a discard timer (Discard Timer) for each PDCP SDU from a higher layer. The length of the discard timer is configurable. The purpose of the discard timer is to prevent the corresponding PDCP SDU from being stored in the PDCP transmission buffer for too long and causing unnecessary buffer overhead. When the discard timer expires, the corresponding PDCP SDU may be discarded.

It should be understood that the sending end mentioned in the embodiments of this application may be the network device 110 in the system 100 or the terminal device 120 in the system 100 .

In 220, when the timer expires, the transmitting end processes the first medium access control MAC data unit including the first PDCP SDU.

Specifically, when sending data, the sender will set the maximum number of retransmissions for the Media Access Control (MAC) data unit. If the transmission fails all the time, and when the maximum number of retransmissions is reached, it can store in the cache. The media access control (Media Access Control, MAC) data unit is cleared. Only when the maximum number of retransmissions is reached, the data in the cache is cleared, which will cause unnecessary cache overhead. Because when the maximum number of retransmissions is reached, the timer set for the PDCP SDU in 210 may have expired, that is, the retransmission of the PDCP SDU has no meaning.

Therefore, in this embodiment of the present application, when the timer set for the PDCP SDU expires, the MAC data unit including the first PDCP SDU is processed, so as to avoid unnecessary buffering overhead as much as possible.

Optionally, the maximum number of retransmissions mentioned in this embodiment of the present application may be a maxHARQ-Tx (maximum hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) sending) parameter, which may be a parameter for each MAC entity. ), which limits the maximum number of retransmissions of each HARQ process for MAC PDUs. Each HARQ process may correspond to a HARQ buffer (buffer). For synchronous uplink HARQ, each HARQ process may maintain a state variable CURRENT_TX_NB, which records the number of times the MAC protocol data unit (Protocol Data Unit, PDU) buffered in the current HARQ buffer has been transmitted. When the HARQ process is established, CURRENT_TX_NB needs to be set to zero. When CURRENT_TX_NB is increased to maxHARQ-tx, the corresponding HARQ buffer needs to be cleared.

Optionally, the embodiment of the present application may use the scenario of data preprocessing. Specifically, when the terminal device receives the PDCP SDU submitted by the upper layer at the PDCP layer, the PDCP SDU can be preprocessed, that is, the radio link control (Radio Link Control, RLC) layer and the MAC layer can be processed. When a corresponding processing command (grant) is received and air interface transmission resources are allocated, a transmission block can be generated quickly and air interface transmission is performed. It is not necessary to perform the processing of the RLC layer and the MAC layer only after receiving the corresponding processing command, which can save processing time.

In order to understand the present application more clearly, the following will describe how when the timer expires, if the transmitting end processes the first medium access control MAC data unit including the first PDCP SDU.

In an implementation manner, when the timer expires and the first MAC data unit is the first MAC SDU that has not been transmitted over the air interface, the first MAC SDU is discarded.

Specifically, in this implementation, if the timer for the first PDCP SDU expires, and the first MAC data unit has not been encapsulated with PDUs, and no air interface transmission resources have been allocated, the data in the HARQ buffer can be cleared, The first MAC SDU is directly lost. Wherein, if the first MAC SDU includes a second PDCP SDU other than the first PDCP SDU, the RLC and MAC layer processing may be performed on the second PDCP SDU again.

Optionally, the maximum number of retransmissions set for the first MAC data unit is cleared.

Specifically, because the first MAC SDU has been discarded, the maximum number of retransmissions set for the MAC data unit has no use, so it can be cleared.

In an implementation manner, when the timer expires and the first MAC data unit is the first MAC PDU transmitted over the air interface, it is determined whether the first MAC PDU includes a second MAC PDU that is not the first PDCP SDU PDCP SDU; process the first MAC PDU according to whether the first MAC PDU includes the second PDCP SDU.

Specifically, in this implementation, if the timer for the first PDCP SDU expires, and the first MAC data unit has been encapsulated with PDUs and allocated air interface transmission resources, it is necessary to determine whether the first MAC PDU is encapsulated with Other PDCP SDUs process the first MAC PDU according to whether there are other PDCP SDUs.

Optionally, when the first MAC PDU does not include the second PDCP SDU, the first MAC PDU is discarded.

Specifically, if the first MAC PDU does not include the second PDCP SDU, it means that the data in the HARQ can be cleared, and the first MAC PDU is discarded, because the timer of the first PDCP SDU has expired, and there is no need to cache and encapsulate the second PDCP SDU A MAC PDU of a PDCP SDU, and at this time, the first MAC PDU is not encapsulated with other PDCP SDUs, and the first MAC PDU is directly discarded without affecting the transmission of other PDCP SDUs.

Optionally, when the first MAC PDU includes the second PDCP SDU, the first MAC data unit is reserved for subsequent retransmission.

Specifically, if the first MAC PDU includes the second PDCP SDU, the first MAC PDU needs to be retained, because directly discarding the first MAC PDU will affect the transmission of other PDCP SDUs, and the receiving end cannot receive the second PDCP SDU due to the corresponding timer. Has expired, the first PDCP SDU will be directly discarded by the receiving end.

The above has described how to process the MAC data unit. The processing of the RLC and PDCP layers will be described below.

Optionally, the first PDCP SDU buffered at the PDCP layer is discarded.

Optionally, discard the RLC SDU including the first PDCP SDU buffered at the RLC layer of the radio link control.

Therefore, in this embodiment of the present application, when the timer set for the PDCP SDU expires, the MAC data unit including the first PDCP SDU is processed, so as to avoid unnecessary buffering overhead as much as possible.

FIG. 3 is a schematic flowchart of a data processing device 300 according to an embodiment of the present application. As shown in FIG. 3 , the device 300 includes an opening unit 310 and a processing unit 320 .

Wherein, the opening unit 310 is configured to start a timer for limiting the buffering duration for the first packet data convergence protocol PDCP service data unit SDU; The first medium access control MAC data unit is processed.

Optionally, the processing unit 320 is further configured to:

When the timer expires and the first MAC data unit is the first MAC SDU that has not been transmitted over the air interface, the first MAC SDU is discarded.

Optionally, the processing unit 320 is further configured to:

When the timer expires and the first MAC data unit is the first MAC protocol data unit PDU transmitted through the air interface, determine whether the first MAC PDU includes a second PDCP SDU other than the first PDCP SDU;

The first MAC PDU is processed according to whether the first MAC PDU includes the second PDCP SDU.

Optionally, the processing unit 320 is further configured to:

When the first MAC PDU does not include the second PDCP SDU, the first MAC PDU is discarded.

Optionally, the processing unit 320 is further configured to:

The maximum number of retransmissions set for the first MAC data unit is cleared.

Optionally, the processing unit 320 is further configured to:

When the first MAC PDU includes the second PDCP SDU, the first MAC PDU is reserved for subsequent retransmission.

Optionally, the processing unit 320 is further configured to:

When the timer expires, the first PDCP SDU buffered at the PDCP layer is discarded.

Optionally, the processing unit 320 is further configured to:

When the timer expires, the RLC SDU including the first PDCP SDU buffered at the radio link control RLC layer is discarded.

It should be understood that the data processing device 300 may correspond to the transmitting end in the method embodiment, and may implement the corresponding operations implemented by the transmitting end in the method embodiment, which will not be repeated here for brevity.

FIG. 4 is a schematic structural diagram of a system chip 600 according to an embodiment of the present application. The system chip 600 in FIG. 4 includes an input interface 601, an output interface 602, and the processor 603 and the memory 604 can be connected by an internal communication connection line, and the processor 603 is used for executing the code in the memory 604.

Optionally, when the code is executed, the processor 603 implements the method executed by the sending end in the method embodiment. For brevity, details are not repeated here.

FIG. 5 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. As shown in FIG. 5 , the communication device 700 includes a processor 710 and a memory 720 . The memory 720 may store program codes, and the processor 710 may execute the program codes stored in the memory 720 .

Optionally, as shown in FIG. 5 , the communication device 700 may include a transceiver 730, and the processor 710 may control the transceiver 730 to communicate externally.

Optionally, the processor 710 may call the program code stored in the memory 720 to perform the corresponding operations of the sender in the method embodiment, which is not repeated here for brevity.

It should be understood that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable Logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (DirectRambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction 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 technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and 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 in this 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 alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (10)

1. a data processing method, is characterized in that, comprises: Starting a timer for limiting the buffering duration for the first packet data convergence protocol PDCP service data unit SDU; When the timer expires, the first medium access control MAC data unit including the first PDCP SDU is processed, Wherein, when the timer expires, processing the first MAC data unit including the first PDCP SDU includes: When the timer expires and the first MAC data unit is the first MAC protocol data unit PDU transmitted over the air interface, it is determined whether the first MAC PDU includes a second MAC PDU that is not the first PDCP SDU PDCP SDUs; and processing the first MAC PDU according to whether the first MAC PDU includes the second PDCP SDU, Wherein, processing the first MAC PDU according to whether the first MAC PDU includes the second PDCP SDU, including: discarding the first MAC PDU when the first MAC PDU does not include the second PDCP SDU; and When the first MAC PDU includes the second PDCP SDU, the first MAC PDU is reserved for subsequent retransmission. 2. The method according to claim 1, wherein, when the timer expires, processing the MAC data unit including the first PDCP SDU, comprising: When the timer expires and the first MAC data unit is the first MAC SDU that has not been transmitted over the air interface, the first MAC SDU is discarded. 3. The method according to claim 2, wherein the method further comprises: The maximum number of retransmissions set for the first MAC data unit is cleared. 4. The method according to any one of claims 1 to 3, wherein when the timer expires, the method further comprises: The first PDCP SDU buffered at the PDCP layer is discarded. 5. The method according to any one of claims 1 to 3, wherein when the timer expires, the method further comprises: The RLC SDU including the first PDCP SDU buffered at the radio link control RLC layer is discarded. 6. A data processing device, comprising: an opening unit, configured to start a timer for limiting the buffering duration for the first packet data convergence protocol PDCP service data unit SDU; a processing unit, configured to process the first medium access control MAC data unit including the first PDCP SDU when the timer expires, Wherein, the processing unit is further used for: When the timer expires and the first MAC data unit is the first MAC protocol data unit PDU transmitted over the air interface, it is determined whether the first MAC PDU includes a second MAC PDU that is not the first PDCP SDU PDCP SDUs; and processing the first MAC PDU according to whether the first MAC PDU includes the second PDCP SDU, Wherein, the processing unit is further used for: discarding the first MAC PDU when the first MAC PDU does not include the second PDCP SDU; and When the first MAC PDU includes the second PDCP SDU, the first MAC PDU is reserved for subsequent retransmission. 7. The device according to claim 6, wherein the processing unit is further configured to: When the timer expires and the first MAC data unit is the first MAC SDU that has not been transmitted over the air interface, the first MAC SDU is discarded. 8. The device according to claim 7, wherein the processing unit is further configured to: The maximum number of retransmissions set for the first MAC data unit is cleared. 9. The device according to any one of claims 6 to 8, wherein the processing unit is further configured to: When the timer expires, the first PDCP SDU buffered at the PDCP layer is discarded. 10. The device according to any one of claims 6 to 8, wherein the processing unit is further configured to: When the timer expires, the RLCSDU including the first PDCP SDU buffered at the radio link control RLC layer is discarded.

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