CN110011925B

CN110011925B - SDU processing method and communication equipment

Info

Publication number: CN110011925B
Application number: CN201810008650.9A
Authority: CN
Inventors: 杨晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-01-04
Filing date: 2018-01-04
Publication date: 2022-09-13
Anticipated expiration: 2038-01-04
Also published as: CN110011925A

Abstract

The embodiment of the invention provides a method for processing SDU and communication equipment, wherein the method comprises the following steps: judging whether SDU of RLC layer is TM SDU or UM SDU; and if the SDU of the RLC layer is TM SDU or UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface, deleting the SDU of the RLC layer cached by the RLC layer. Thereby enabling to realize saving of the buffer space of the RLC layer.

Description

SDU processing method and communication equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for processing a Service Data Unit (SDU) and a communication device.

Background

Radio Link Control (RLC) layer in the current communication system may include three operation modes, namely Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM), wherein different processing exists in different operation modes, for example: for TM SDU, the SDU is directly sent to the bottom layer without being processed in the RLC layer; for UM SDU, no receiving end confirmation is needed, and no retransmission is needed; for the SDU of AM, the receiving end needs to confirm, and for the SDU that the receiving end does not receive, the transmitting end needs to trigger retransmission. However, in any operation mode, the buffer (buffer) of the RLC layer buffers the SDU, which results in an excessively large buffer occupancy of the RLC layer.

Disclosure of Invention

The embodiment of the invention provides a method for processing SDU and communication equipment, which are used for solving the problem of overlarge buffer occupancy of an RLC layer.

In order to solve the technical problem, the invention is realized as follows: a method for processing SDU comprises the following steps:

judging whether SDU of RLC layer is TM SDU or UM SDU;

and if the SDU of the RLC layer is TM SDU or UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface, deleting the SDU of the RLC layer cached by the RLC layer.

In a first aspect, an embodiment of the present invention further provides a method for processing an SDU, including:

judging whether SDU of RLC layer is TM SDU or UM SDU;

In a second aspect, an embodiment of the present invention provides a communication device, including:

a judging module, which is used for judging whether the SDU of the RLC layer is TM SDU or UM SDU;

and the deleting module is used for deleting the SDU of the RLC layer cached by the RLC layer if the SDU of the RLC layer is the SDU of TM or the SDU of UM and the SDU of the RLC layer is sent to a bottom layer or sent at an air interface.

In a third aspect, an embodiment of the present invention provides a communication device, including: the SDU processing method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the computer program realizes the steps in the SDU processing method provided by the embodiment of the invention when being executed by the processor.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps in the SDU processing method provided in the embodiment of the present invention.

In the embodiment of the invention, whether SDU of RLC layer is TM SDU or UM SDU is judged; and if the SDU of the RLC layer is TM SDU or UM SDU, and the SDU of the RLC layer is sent to a bottom layer or is already sent at an air interface, deleting the SDU of the RLC layer cached by the RLC layer. Thereby enabling to realize saving of the buffer space of the RLC layer.

Drawings

Fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart of a method for processing an SDU according to an embodiment of the present invention;

fig. 3 is a flowchart of another SDU processing method according to an embodiment of the present invention;

fig. 4 is a flowchart of another SDU processing method according to an embodiment of the present invention;

fig. 5 is a block diagram of a communication device according to an embodiment of the present invention;

fig. 6 is a block diagram of another communication device provided by an embodiment of the present invention;

fig. 7 is a block diagram of another communication device provided in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

Referring to fig. 1, fig. 1 is a structural diagram of a network system to which an embodiment of the present invention is applicable, and as shown in fig. 1, the network system includes a User terminal 11 and a base station 12, where the User terminal 11 may be a User Equipment (UE), for example: the terminal side Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that the specific type of the user terminal 11 is not limited in the embodiments of the present invention. The user terminal 11 may communicate with the base station 12, for example: SDU transmission between the user terminal 11 and the base station 12. The base station 12 may be a base station of 5G and later versions (e.g., a gNB, a 5G NR NB), or a base station in other communication systems, or referred to as a node B, an evolved node B, or other words in the field, and as long as the same technical effect is achieved, the base station is not limited to a specific technical word, and it should be noted that, in the embodiment of the present invention, only the 5G base station is taken as an example, but the specific type of the base station 12 is not limited.

Referring to fig. 2, fig. 2 is a flowchart of a method for processing an SDU according to an embodiment of the present invention, and as shown in fig. 2, the method includes the following steps:

step 201, judging whether SDU of RLC layer is TM SDU or UM SDU.

Step 201 may be to determine whether an SDU of the RLC layer (which may also be referred to as RLC SDU) is an SDU of TM or an SDU of UM according to an operation mode of the RLC layer. For example: if the current working mode of the RLC layer is TM, it may be determined that the SDU of the RLC layer is TM SDU, or if the current working mode of the RLC layer is UM, it may be determined that the SDU of the RCL layer is UM SDU.

In addition, in the embodiment of the present invention, the SDU in the RLC layer may be any SDU in the RLC layer, and the SDU in the RLC layer may include a plurality of segmented SDUs or an unsegmented SDU.

Step 202, if the SDU of the RLC layer is a TM SDU or an UM SDU, and the SDU of the RLC layer is sent to a bottom layer or has been sent over the air interface, deleting the RLC layer buffered SDU.

Step 202 may include: if the SDU of the RLC layer is the SDU of the TM and the SDU of the RLC layer is sent to a bottom layer or sent at an air interface, deleting the SDU of the RLC layer cached by the RLC layer; and may further include: and if the SDU of the RLC layer is the SDU of UM, and the SDU of the RLC layer is sent to a bottom layer or is sent at an air interface, deleting the SDU of the RLC layer cached by the RLC layer.

The sending of the SDU to the RLC layer may be that the SDU of the RLC layer is sent from the RLC layer to the bottom layer; the SDU of the RLC layer may have been sent over the air interface, where the SDU of the RLC layer has been delivered to the air interface from the communication device, for example: the bottom layer of the communication device finishes sending the SDU, or the radio frequency unit of the communication device finishes sending the SDU, and so on. In addition, the SDU of the RLC layer in step 202 may be a whole SDU, for example: the unsegmented SDU, or the SDU of the RLC layer in step 202, may be one or more segments of an SDU. In addition, if one or more SDUs of the RLC layer are sent to the bottom layer or sent over the air interface, step 202 may delete all segments of the SDU buffered by the RLC layer, or delete corresponding segments (only delete segments sent to the bottom layer or sent over the air interface).

In addition, the bottom layer may be a protocol layer below the RLC layer, for example: a Media Access Control (MAC) layer.

It should be noted that step 201 may be performed before the SDU in the RLC layer is sent to the bottom layer or has been sent over the air interface, or step 201 may be performed when the SDU is sent to the bottom layer or after the SDU is sent to the bottom layer, and the like, which is not limited in this embodiment of the present invention.

By the steps, TM SDU or UM SDU can be deleted from RLC layer buffered SDU after RLC layer SDU is sent to bottom layer or sent over air interface, so as to save RLC layer buffer space and ensure normal delivery of other data in RLC layer. And because TM and UM do not need to retransmit, deleting SDU buffered in RLC layer will not influence transmission performance of communication equipment either. If the SDU of the RLC layer is not an SDU of TM, and is not an SDU of UM, the procedure may be terminated.

In addition, in the embodiment of the invention, after the SDU is sent to the bottom layer or sent by the air interface, the SDU of the RLC layer cached by the RLC layer can be deleted, so that under the condition of bad network conditions, the SDU stored by the RLC layer is deleted, the cache congestion of the RLC layer can be avoided, and the processing performance of the RLC layer is improved.

The method may be applied to a communication device, which may be a user terminal or a base station, etc., and the embodiment of the present invention is not limited thereto, and the method may be applied to a 5G system, but is not limited thereto, and is applicable to other communication systems as long as substantially the same function can be achieved, for example: communication systems, etc. that can apply 4G or 6G systems or other application system information blocks.

In this embodiment, by determining whether the SDU of the RLC layer is a TM SDU or an UM SDU; and if the SDU of the RLC layer is TM SDU or UM SDU, and the SDU of the RLC layer is sent to a bottom layer or is already sent at an air interface, deleting the SDU of the RLC layer cached by the RLC layer. Thereby enabling to realize saving of the buffer space of the RLC layer.

Referring to fig. 3, fig. 3 is a flowchart of another SDU processing method according to an embodiment of the present invention, and as shown in fig. 3, the method includes the following steps:

step 301, determining whether the SDU of the RLC layer is a TM SDU or a UM SDU.

Wherein, step 301 may be performed when indication information indicating to discard the SDU of the RLC layer transmitted by a higher layer is not received.

Step 302, if the SDU of the RLC layer is a TM SDU or an UM SDU, and all data of the RLC layer SDU is sent to a bottom layer or sent over the air interface, deleting all data of the RLC layer SDU cached in the RLC layer.

Here, all data of the SDU may be understood as an SDU which is not segmented.

By step 302, it can be realized that for an SDU that is not segmented, if the SDU is a TM SDU or an UM SDU, the RLC layer buffers the deletion of the SDU after the SDU is sent to the bottom layer or sent over the air interface, thereby saving the buffer space of the RLC layer and further ensuring the normal delivery of other data of the RLC layer.

It should be noted that step 302 is an alternative, for example: step 302 may be replaced with the following steps:

and if the SDU of the RLC layer is the SDU of TM or the SDU of UM, and at least one segment of the SDU of the RLC layer is sent to a bottom layer or sent on an air interface, deleting the at least one segment cached by the RLC layer.

By the step, the segmented TM SDU or UM SDU can be deleted after one or more segments are sent to the bottom layer or sent on the air interface, so that the effect of saving the buffer space is achieved, and further the normal delivery of other data of the RLC layer is ensured. For example: an SDU includes a segment a, a segment b, and a segment c, and the above steps may be to buffer the segment a in the RLC layer when the segment a is transmitted to the bottom layer or has been transmitted over the air, or may be to buffer the segment a and the segment b in the RLC layer when the segment a and the segment b are transmitted to the bottom layer or have been transmitted over the air.

In this embodiment, the above steps may be performed when the indication information indicating that the SDU of the RLC layer is discarded is not received, and all data (unsegmented SDU) or segments that have been sent to the bottom or sent in the air interface in the RLC layer cache are deleted, so as to achieve the effect of saving the cache space and further ensure normal delivery of other data of the RLC layer. In addition, the indication information does not need to be sent by a high layer, so that the transmission in the communication equipment can be saved, and the power consumption of the communication equipment can be reduced.

Referring to fig. 4, fig. 4 is a flowchart of another SDU processing method according to an embodiment of the present invention, and as shown in fig. 4, the method includes the following steps:

step 401, determine whether the SDU of RLC layer is TM SDU or UM SDU.

Step 402, in the case that the RLC layer receives an indication information indicating that the SDU of the RLC layer is discarded from the higher layer, if the SDU of the RLC layer is a TM SDU or an UM SDU, and the SDU of the RLC layer is sent to the bottom layer or has been sent over the air interface, the SDU of the RLC layer cached in the RLC layer is deleted.

It should be noted that, in this embodiment, there is no limitation on the execution sequence of receiving the indication information and determining whether the SDU in the RLC layer is a TM SDU or an UM SDU, that is, it is determined that the operation mode of the SDU and the received higher layer discard indication are not in strict time order. For example: when receiving the indication information, the RLC layer may determine whether the SDU of the RLC layer is TM SDU or UM SDU, or the RLC layer may first determine whether the SDU is TM SDU or UM SDU, and then discard the SDU when the RLC layer receives the indication information indicating that the RLC layer discards the SDU.

The higher layer may be a protocol layer located before the RLC, and the indication information may be indication information indicating that the RLC layer discards an SDU of the RLC layer. For example: due to different network conditions or the conditions of the communication device itself, the higher layer needs to instruct the RLC layer to discard the SDU from the RLC layer and transmit the instruction information.

Through the steps, the deleting operation is carried out under the condition that the indication information which is sent by the higher layer and discards the SDU of the RLC layer is received, and the deleting operation is carried out based on the indication information sent by the higher layer, so that the flexibility of deleting the SDU cached by the RLC layer can be improved. Because higher layers are more powerful and acquire more information, it is easier to make deletion decisions than the RLC layer.

Optionally, if the SDU of the RLC layer is a TM SDU or an UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface, deleting the SDU of the RLC layer cached by the RLC layer, where the deleting includes:

and if the SDU of the RLC layer is TM SDU or UM SDU, and at least one segment of the SDU of the RLC layer is sent to a bottom layer or sent on an air interface, deleting all segments of the SDU of the RLC layer cached by the RLC layer.

The foregoing deletion of all segments of the SDU buffered in the RLC layer may also be referred to as discarding the SDU in the RCL layer, or discarding the SDU by the communication device.

In this embodiment, if receiving the indication information of the higher layer, one or more segments of an SDU in the RLC layer may be sent to the bottom layer or sent over the air interface, and all segments buffered in the RLC layer may be deleted, so as to improve the efficiency of deleting the SDU.

Of course, in some embodiments, for an SDU that is not segmented, step 402 may be to delete the RLC layer buffered SDU after the SDU has been sent to the bottom layer or has been sent over the air interface. Alternatively, the SDU for segmentation may only delete segments that have been sent to the underlying layer or have been sent over the air interface, which is not limited in this embodiment.

Optionally, after the step of deleting all segments of the SDU of the RLC layer cached by the RLC layer if the SDU of the RLC layer is a TM SDU or a UM SDU and at least one segment of the RLC SDU is sent to a bottom layer or sent over an air interface, the method further includes:

and sending a notification message for notifying that the SDU of the RLC layer is discarded to a receiving end.

In this embodiment, if the SDU on the RLC layer is discarded, a notification message may be sent to the receiving end to notify the receiving end that the SDU on the RLC layer has been discarded by the sending end, so that the receiving end may cancel the relevant operation for the SDU on the RLC layer, thereby preventing the receiving end from waiting until the SDU is not received, further saving power consumption of the receiving end, and improving data processing performance of the receiving end.

In this embodiment, the foregoing steps may be implemented to delete the SDU cached in the RLC layer according to indication information sent by the higher layer to discard the SDU in the RLC layer, so as to save a cache space in the RLC layer and improve flexibility of deleting the SDU cached in the RLC layer. In addition, the method can also achieve the beneficial effects of improving the efficiency of deleting the SDU, saving the power consumption of the receiving end, improving the data processing performance of the receiving end and the like.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present invention, and as shown in fig. 5, the communication device 500 includes:

a judging module 501, configured to judge whether an SDU in the RLC layer is a TM SDU or an UM SDU;

a deleting module 502, configured to delete the SDU in the RLC layer cached in the RLC layer if the SDU in the RLC layer is a TM SDU or an UM SDU, and the SDU in the RLC layer is sent to a bottom layer or sent over an air interface.

Optionally, the deleting module 502 is configured to delete all data of the SDU of the RLC layer cached by the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU, and all data of the SDU of the RLC layer is sent to a bottom layer or sent over an air interface; or

The deleting module 502 is configured to delete at least one segment cached by the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU, and the at least one segment of the RLC layer SDU is sent to a bottom layer or sent over an air interface.

Optionally, the deleting module 502 is configured to, when the RLC layer receives the indication information indicating that the RLC layer has sent the instruction to discard the SDU on the RLC layer, delete the SDU on the RLC layer cached in the RLC layer if the SDU on the RLC layer is a TM SDU or an UM SDU, and the SDU on the RLC layer is sent to a bottom layer or sent over an air interface.

Optionally, the deleting module 502 is configured to, when the RLC layer receives the indication information indicating that the SDU of the RLC layer is discarded from the higher layer, delete all segments of the SDU of the RLC layer cached in the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU and at least one segment of the RLC layer SDU is sent to the bottom layer or sent over the air interface.

Optionally, as shown in fig. 6, the communication device 500 further includes:

a sending module 503, configured to send a notification message for notifying that the SDU in the RLC layer is discarded to a receiving end.

The communication device provided in the embodiment of the present invention can implement each process implemented by the mobile terminal in the method embodiments in fig. 2 to fig. 4, and is not described here again to avoid repetition. The communication device may save buffer space in the RLC layer.

Figure 7 is a schematic diagram of the hardware architecture of a communication device implementing various embodiments of the present invention,

the communication device 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, a power supply 711, and the like. Those skilled in the art will appreciate that the communication device configuration shown in fig. 7 does not constitute a limitation of communication devices, which may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the communication device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The processor 710 is configured to determine whether an SDU on an RLC layer is an SDU in a transparent mode TM or an SDU in an unacknowledged mode UM;

Optionally, the deleting, performed by the processor 710, the SDU of the RLC layer cached by the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface includes:

if the SDU of the RLC layer is TM SDU or UM SDU, and all data of the SDU of the RLC layer are sent to a bottom layer or sent at an air interface, deleting all data of the SDU of the RLC layer cached by the RLC layer; or

Optionally, if the SDU of the RLC layer executed by the processor 710 is a TM SDU or an UM SDU, and the SDU of the RLC layer is sent to a bottom layer or has been sent over an air interface, deleting the SDU of the RLC layer cached by the RLC layer, including:

under the condition that an RLC layer receives indication information which indicates that a high layer sends the SDU to be discarded, if the SDU of the RLC layer is TM SDU or UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface, the SDU of the RLC layer cached in the RLC layer is deleted.

and if the SDU of the RLC layer is TM SDU or UM SDU and at least one segment of the SDU of the RLC layer is sent to a bottom layer or is sent at an air interface, deleting all segments of the SDU of the RLC layer cached by the RLC layer.

Optionally, after the step of deleting all segments of the SDU of the RLC layer cached by the RLC layer if the SDU of the RLC layer is a TM SDU or a UM SDU and at least one segment of the RLC SDU is sent to a bottom layer or sent over an air interface, the radio frequency unit 701 is configured to: and sending a notification message for notifying that the SDU of the RLC layer is discarded to a receiving end.

The communication device may save buffer space in the RLC layer.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 710; in addition, the uplink data is transmitted to the base station. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 may also communicate with a network and other devices through a wireless communication system.

The communication device provides wireless broadband internet access to the user via the network module 702, such as to assist the user in sending and receiving e-mail, browsing web pages, and accessing streaming media.

The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the communication apparatus 700. The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.

The communication device 700 also includes at least one sensor 705, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 7061 and/or a backlight when the communication device 700 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of a communication device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 707 is operable to receive input numeric or character information and generate key signal inputs related to user settings and function control of the communication device. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although in fig. 7, the touch panel 7071 and the display panel 7061 are implemented as two independent components to implement the input and output functions of the communication device, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the communication device, which is not limited herein.

The interface unit 708 is an interface through which an external device is connected to the communication apparatus 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the communication apparatus 700 or may be used to transmit data between the communication apparatus 700 and an external device.

The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, etc. Further, the memory 709 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 710 is a control center of the communication apparatus, connects various parts of the entire communication apparatus using various interfaces and lines, and performs various functions of the communication apparatus and processes data by running or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby performing overall monitoring of the communication apparatus. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.

The communication device 700 may also include a power supply 711 (e.g., a battery) for powering the various components, and preferably, the power supply 711 may be logically coupled to the processor 710 via a power management system such that functions of managing charging, discharging, and power consumption are performed via the power management system.

In addition, the communication device 700 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a communication device, including a processor 710, a memory 709, and a computer program stored in the memory 709 and capable of running on the processor 710, where the computer program is executed by the processor 710 to implement each process of the SDU processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the SDU processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for processing service data units, SDUs, comprising:

judging whether SDU of radio link layer control protocol RLC layer is SDU of transparent mode TM or SDU of unacknowledged mode UM;

if the SDU of the RLC layer is TM SDU or UM SDU, and the SDU of the RLC layer is sent to a bottom layer or is sent at an air interface, deleting the SDU of the RLC layer cached by the RLC layer;

if the SDU of the RLC layer is a TM SDU or a UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface, deleting the SDU of the RLC layer cached by the RLC layer, including:

2. The method of claim 1, wherein if the SDU of the RLC layer is a TM SDU or an UM SDU, and the RLC layer SDU is sent to a bottom layer or has been sent over the air, then deleting the RLC layer SDU buffered in the RLC layer, further comprising:

and if the SDU of the RLC layer is TM SDU or UM SDU and all data of the SDU of the RLC layer are sent to a bottom layer or sent at an air interface, deleting all data of the SDU of the RLC layer cached by the RLC layer.

3. The method of claim 1, wherein the deleting the RLC layer buffered SDU in the RLC layer if the RLC layer SDU is a TM SDU or an UM SDU and the RLC layer SDU is sent to a bottom layer or has been sent over an air interface comprises:

4. The method of claim 3, wherein the deleting the RLC layer buffered SDU in the RLC layer if the RLC layer SDU is a TM SDU or a UM SDU and the RLC layer SDU is sent to a bottom layer or has been sent over the air interface comprises:

5. The method of claim 4, wherein after the step of deleting all segments of the RLC layer buffered SDU by the RLC layer if the RLC layer SDU is a TM SDU or a UM SDU and at least one segment of the RLC layer SDU is transmitted to a bottom layer or has been transmitted over the air interface, the method further comprises:

6. A communication device, comprising:

the judging module is used for judging whether the SDU of the RLC layer is the SDU of TM or the SDU of UM;

a deletion module, configured to delete the SDU of the RLC layer cached in the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU, and the SDU of the RLC layer is sent to a bottom layer or sent over an air interface;

the deleting module is configured to delete at least one segment cached by the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU, and the at least one segment of the RLC layer SDU is sent to a bottom layer or sent over an air interface.

7. The communications device of claim 6, wherein the deleting module is further configured to delete all data of the SDU of the RLC layer buffered by the RLC layer if the SDU of the RLC layer is a TM SDU or an UM SDU and all data of the SDU of the RLC layer is transmitted to a bottom layer or has been transmitted over an air interface.

8. The communications device of claim 6, wherein the deleting module is configured to delete the SDU in the RLC layer buffered in the RLC layer if the SDU in the RLC layer is a TM SDU or a UM SDU and the SDU in the RLC layer is transmitted to a bottom layer or has been transmitted over an air interface, when the RLC layer receives indication information indicating that the SDU in the RLC layer is discarded from a higher layer.

9. The communications device of claim 8, wherein the deletion module is configured to, in a case that an RLC layer receives indication information indicating that SDU of the RLC layer is discarded from a higher layer, delete all segments of SDU of the RLC layer buffered by the RLC layer if SDU of the RLC layer is TM SDU or UM SDU and at least one segment of SDU of the RLC layer is transmitted to a bottom layer or has been transmitted over an air interface.

10. The communication device of claim 9, wherein the communication device further comprises:

and the sending module is used for sending a notification message for notifying that the SDU of the RLC layer is discarded to a receiving end.

11. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the method of processing SDUs according to any of claims 1 to 5.

12. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps of the method of processing an SDU according to any of claims 1-5.