CN109644351B

CN109644351B - Data processing method and device

Info

Publication number: CN109644351B
Application number: CN201780049127.4A
Authority: CN
Inventors: 唐海
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2020-09-04
Anticipated expiration: 2037-11-17
Also published as: WO2019095293A1; CN109644351A

Abstract

The embodiment of the application provides a data processing method and device, which can avoid unnecessary caching overhead as much as possible. The method comprises the following steps: starting a timer for limiting the buffer duration aiming at a first packet data convergence protocol PDCP service data unit SDU; processing a first media access control, MAC, data unit including the first PDCP SDU upon expiration of the timer.

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 apparatus.

Background

In a Long Term Evolution (LTE) system, when a sending end sends data, a maximum retransmission number is set for a Media Access Control (MAC) data unit, and if transmission fails all the time and the maximum retransmission number is reached, the Media Access Control (MAC) data unit stored in a cache can be cleared.

The data in the buffer is only cleared when the maximum number of retransmissions is reached, which results in unnecessary buffering overhead.

Disclosure of Invention

The embodiment of the application provides a data processing method and device, which can avoid unnecessary caching overhead as much as possible.

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

starting a timer for limiting the buffer duration aiming at a first packet data convergence protocol PDCP service data unit SDU;

processing a first media access control, MAC, data unit including the first PDCP SDU upon expiration of the timer.

Therefore, in the 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 that unnecessary buffering overhead can be avoided 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:

and when the timer expires and the first MAC data unit is a first MAC SDU which is not transmitted over an air interface, discarding the first MAC SDU.

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

when the timer expires and the first MAC data unit is a first MAC protocol data unit PDU transmitted through an air interface, judging whether the first MAC PDU comprises a second PDCP SDU which is not the first PDCP SDU;

and processing the first MAC PDU according to whether the first MAC PDU comprises the second PDCP SDU or not.

With reference to the first aspect or any one of the foregoing possible implementation manners of the first aspect, in another possible implementation manner of the first aspect, processing the first MAC PDU according to whether the first MAC PDU includes the second PDCP SDU includes:

discarding the first MAC PDU when the first MAC PDU does not include the second PDCP SDU.

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

and clearing the maximum retransmission times set for the first MAC data unit.

reserving the first MAC PDU for subsequent retransmission when the first MAC PDU includes the second PDCP SDU.

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

discarding the first PDCP SDU buffered at the PDCP layer.

discarding the RLC SDU including the first PDCP SDU buffered at a radio Link control RLC layer.

In a second aspect, a data processing device is provided for performing the method of the first aspect or any possible implementation manner of the first aspect. In particular, the data processing device comprises functional modules for performing the method of the first aspect described above or any possible implementation manner of the first aspect.

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

In a fourth aspect, a computer-readable medium is provided for storing a computer program comprising instructions for performing any one of the above methods or any possible implementation.

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 methods described above or any possible implementation thereof.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

Fig. 2 is a schematic flow chart of a data processing method according to an embodiment of the present application.

Fig. 3 is a schematic block diagram of a data processing apparatus 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 Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution), a LTE Frequency Division Duplex (FDD) System, a Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a world wide Microwave Access (worldwide interoperability for Microwave Access), or a future 5G System.

Fig. 1 illustrates 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. Network device 110 may be a device that communicates with a terminal device. Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices (e.g., UEs) located within the coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a relay Station, an access point, a vehicle-mounted device, a wearable device, a Network-side device in a future 5G Network, or a Network device in a future evolved Public Land Mobile Network (PLMN), or the like.

The wireless communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. The terminal device 120 may be mobile or stationary. Alternatively, terminal Equipment 120 may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN, etc.

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

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

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the wireless communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

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

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Fig. 2 is a schematic flow chart diagram of a wireless communication method 200 according to an embodiment of the present application. The method 200 may alternatively be applied to the system shown in fig. 1, but is not limited thereto. The method 200 includes at least some of the following.

In 210, a transmitting end starts a timer for limiting a buffering duration for a first Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU).

Specifically, at the PDCP layer, the transmitting end may start a Discard Timer (Discard Timer) for each PDCP SDU from the higher layer, respectively. Wherein the duration of the discard timer is configurable. The discard timer is intended to prevent unnecessary buffering overhead due to the corresponding PDCP SDU being stored in the PDCP transmission buffer for an excessively long time. When the discard timer expires, the corresponding PDCP SDU can be discarded.

It should be understood that the sending end mentioned in the embodiment of the present application may be the network device 110 in the system 100, and may also be the terminal device 120 in the system 100.

At 220, upon expiration of the timer, the transmitting end processes a first medium access control MAC data unit including the first PDCP SDU.

Specifically, when sending data, the sending end sets a maximum retransmission time for a Media Access Control (MAC) data unit, and if transmission fails all the time and the maximum retransmission time is reached, the sending end may clear the Media Access Control (MAC) data unit stored in the buffer. Only when the maximum retransmission number is reached, the data in the buffer is cleared, which will result in unnecessary buffer overhead. Since the timer set for the PDCP SDU set in 210 may have expired when the maximum number of retransmissions is reached, i.e. there is no significance already for the retransmission of the PDCP SDU.

Optionally, the maximum retransmission number mentioned in this embodiment of the present application may be a maxHARQ-Tx (Hybrid Automatic Repeat reQuest (HARQ)) parameter, which may be configured for each MAC entity (entry), and limits the maximum retransmission number of each HARQ process for a MAC PDU. 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 that records the number of times a MAC Protocol Data Unit (PDU) has been transmitted for buffering in the CURRENT HARQ buffer. CURRENT _ TX _ NB needs to be set to zero when the HARQ process is established. When CURRENT _ TX _ NB is added to maxHARQ-TX, the corresponding HARQ buffer needs to be cleared.

Optionally, the embodiment of the present application may be used in a data preprocessing scenario. Specifically, when the terminal device receives a PDCP SDU delivered by a higher layer in the PDCP layer, the PDCP SDU may be preprocessed, that is, the Radio Link Control (RLC) layer and the MAC layer may be processed, and when a corresponding processing command (grant) is received and an empty transmission resource is allocated, a transport block may be generated quickly and an empty transmission may be performed. The RLC layer and the MAC layer are processed without receiving corresponding processing commands, so that the processing time can be saved.

For a more clear understanding of the present application, it will be described below that the transmitting end processes the first medium access control MAC data unit including the first PDCP SDU if the timer expires.

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

Specifically, in this implementation manner, if the timer for the first PDCP SDU expires, the first MAC data unit has not yet performed PDU encapsulation, and no air interface transmission resource is allocated, the data in the HARQ buffer may be cleared, and the first MAC SDU is directly lost. Wherein, if the first MAC SDU includes a second PDCP SDU except for the first PDCP SDU, the second PDCP SDU can be again processed by the RLC and MAC layers.

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

Specifically, since the first MAC SDU has been discarded, the maximum number of retransmissions set for the MAC data unit has not been used, and thus, the zero clearing can be performed.

In one implementation, when the timer expires and the first MAC data unit is a first MAC PDU transmitted over an air interface, determining whether the first MAC PDU includes a second PDCP SDU that is not the first PDCP SDU; and processing the first MAC PDU according to whether the first MAC PDU comprises the second PDCP SDU or not.

Specifically, in this implementation manner, if the timer for the first PDCP SDU expires and the first MAC data unit has already performed PDU encapsulation and allocated an air interface transmission resource, it needs to determine whether the first MAC PDU is encapsulated with other PDCP SDUs, and 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 HARQ data can be cleared, and the first MAC PDU is discarded, because the timer of the first PDCP SDU has expired, the MAC PDU encapsulated with the first PDCP SDU does not need to be buffered, 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 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 may affect the transmission of other PDCP SDUs, and the first PDCP SDU will be directly discarded by the receiving end since the corresponding timer has expired.

How MAC data units are processed has been described above. The processing of the RLC and PDCP layers will be explained below.

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

Optionally, RLC SDUs buffered at the radio link control RLC layer including the first PDCP SDU are discarded.

Fig. 3 is a schematic flow chart of a data processing apparatus 300 according to an embodiment of the present application. As shown in fig. 3, the apparatus 300 includes a startup unit 310 and a processing unit 320.

The starting unit 310 is configured to start a timer for limiting a buffer duration for a first packet data convergence protocol PDCP service data unit SDU; a processing unit 320, configured to process the first medium access control MAC data unit including the first PDCP SDU when the timer expires.

Optionally, the processing unit 320 is further configured to:

and when the timer expires and the first MAC data unit is a first MAC SDU which is not transmitted over the air interface, discarding the first MAC SDU.

Optionally, the processing unit 320 is further configured to:

and clearing the maximum retransmission times set for the first MAC data unit.

Optionally, the processing unit 320 is further configured to:

and reserving the first MAC PDU for subsequent retransmission when the first MAC PDU comprises the second PDCP SDU.

Optionally, the processing unit 320 is further configured to:

discarding the first PDCP SDU buffered at the PDCP layer when the timer expires.

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 a transmitting end in the method embodiment, and corresponding operations implemented by the transmitting end in the method embodiment may be implemented, which are not described herein again 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 of fig. 4 includes an input interface 601, an output interface 602, the processor 603, and a memory 604, which may be connected via an internal communication connection, and the processor 603 is configured to execute codes in the memory 604.

Optionally, when the code is executed, the processor 603 implements a method performed by a sending end in the method embodiment. For brevity, no further description is provided herein.

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 can store program codes, and the processor 710 can execute the program codes stored in the memory 720.

Alternatively, 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 corresponding operations of the sending end in the method embodiment, which is not described herein for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. 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 connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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

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

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

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

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data processing method, comprising:

processing a first Media Access Control (MAC) data unit including the first PDCP SDU when the timer expires,

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 a first MAC protocol data unit PDU transmitted through an air interface, judging whether the first MAC PDU comprises a second PDCP SDU which is not the first PDCP SDU; 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 comprises:

discarding the first MAC PDU when the first MAC PDU does not include the second PDCP SDU; and

2. The method as claimed in claim 1, wherein processing the MAC data unit including the first PDCP SDU when the timer expires comprises:

3. The method of claim 2, further comprising:

and clearing the maximum retransmission times set for the first MAC data unit.

4. The method according to any of claims 1 to 3, wherein upon expiration of the timer, the method further comprises:

discarding the first PDCP SDU buffered at the PDCP layer.

5. The method according to any of claims 1 to 3, wherein upon expiration of the timer, the method further comprises:

6. A data processing apparatus, characterized by comprising:

a starting unit, configured to start a timer for limiting a buffer duration for a first packet data convergence protocol PDCP service data unit SDU;

a processing unit, configured to process a first medium access control MAC data unit including the first PDCP SDU when the timer expires,

wherein the processing unit is further to:

7. The device of claim 6, wherein the processing unit is further configured to:

8. The device of claim 7, wherein the processing unit is further configured to:

and clearing the maximum retransmission times set for the first MAC data unit.

9. The apparatus of any of claims 6-8, wherein the processing unit is further to:

discarding the first PDCP SDU buffered at a PDCP layer when the timer expires.

10. The apparatus of any of claims 6-8, wherein the processing unit is further to:

discarding the RLC SDU buffered at a Radio Link Control (RLC) layer including the first PDCP SDU when the timer expires.