CN110167146B

CN110167146B - SDU processing method and communication equipment

Info

Publication number: CN110167146B
Application number: CN201810145858.5A
Authority: CN
Inventors: 杨晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-02-12
Filing date: 2018-02-12
Publication date: 2023-06-09
Anticipated expiration: 2038-02-12
Also published as: CN110167146A

Abstract

The embodiment of the invention provides a processing method of SDU and communication equipment, wherein the method comprises the following steps: judging whether SDU of RLC layer is sent to bottom layer or has been sent on air interface; if SDUs are sent to the bottom layer or already sent on the air interface, deleting the SDUs cached by the RLC layer according to configuration instructions or service types, so that the cache space of the RLC layer can be saved.

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 an SDU and a communication device.

Background

The radio link layer control protocol (Radio Link Control, RLC) layer in the present communication system may include three operation modes, namely a Transparent Mode (TM), a non-acknowledged Mode (Unacknowledged Mode, UM) and an acknowledged Mode (Acknowledged Mode, AM), wherein different operation modes have different processes, for example: for the SDU of the TM, the SDU is not processed in the RLC layer and is directly sent to the bottom layer; for SDUs of UM, no receiving-end acknowledgement is required and no retransmission is performed; for the SDU of AM, the receiving end needs to confirm, and for the SDU not received by the receiving end, the transmitting end needs to trigger retransmission. However, in either mode of operation, the buffer (buffer) of the RLC layer buffers SDUs, which results in an excessive buffer occupation of the RLC layer.

Disclosure of Invention

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

In order to solve the technical problems, the invention is realized as follows: a SDU processing method is applied to communication equipment and comprises the following steps:

judging whether SDU of RLC layer is sent to bottom layer or has been sent on air interface;

and if the SDU is transmitted to the bottom layer or is transmitted on an air interface, deleting the SDU cached by the RLC layer according to a configuration instruction or a service type.

In a first aspect, an embodiment of the present invention further provides a method for processing an SDU, which is applied to a communication device, including:

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

a judging module, configured to judge whether an SDU of the RLC layer is sent to the bottom layer or has been sent over the air interface;

and the deleting module is used for deleting the SDU cached by the RLC layer according to the configuration instruction or the service type if the SDU is sent to the bottom layer or is sent on an air interface.

In a third aspect, an embodiment of the present invention provides a communication device, including: the SDU processing method comprises the steps of a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the computer program is executed by the processor to realize the steps in the SDU processing method provided by the embodiment of the invention.

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, where the computer program when executed by a processor implements the steps of the method for processing SDUs provided in the embodiment of the present invention.

In the embodiment of the invention, whether SDUs of the radio link layer control protocol (RLC) layer are sent to the bottom layer or are sent on an air interface is judged; if SDUs are sent to the bottom layer or already sent on the air interface, deleting the SDUs cached by the RLC layer according to configuration instructions or service types, so that the cache space of the RLC layer can be saved.

Drawings

FIG. 1 is a block diagram of a network system to which embodiments of the present invention are applicable;

fig. 2 is a flowchart of a method for processing SDUs provided in an embodiment of the present invention;

Fig. 3 is a flowchart of another method for processing SDUs provided in an embodiment of the present invention;

fig. 4 is a block diagram of a communication device according to an embodiment of the present invention;

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

fig. 6 is a block diagram of another communication device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable, as shown in fig. 1, including a user terminal 11 and a base station 12, where the user terminal 11 may be UE (User Equipment), for example: the terminal side devices may be mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop computers), personal digital assistants (personal digital assistant, PDA for short), mobile internet devices (Mobile Internet Device, MID) or Wearable devices (webable devices), etc., 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 base station 12 may be a base station in a 5G network (e.g., a gNB, 5G NR NB), or the base station 12 may be a base station in a 4G network (e.g., an eNB, an lte NB). It should be noted that the specific type of the base station 12 is not limited in the embodiment of the present invention.

In the embodiment of the present invention, the communication device may be a user terminal or a base station,

referring to fig. 2, fig. 2 is a flowchart of a method for processing SDUs according to an embodiment of the present invention, as shown in fig. 2, including the following steps:

step 201, it is determined whether an SDU of the RLC layer is transmitted to the bottom layer or has been transmitted over the air.

In addition, in the embodiment of the present invention, the SDU of the RLC layer (may also be referred to as an RLC SDU) may be any SDU of the RLC layer, and the SDU of the RLC layer may be an SDU including a plurality of segments, or an SDU not segmented.

The transmitting of the SDU of the RLC layer to the bottom layer may be that the SDU of the RLC layer is transmitted from the RLC layer to the bottom layer; the SDU of the RLC layer may have been transmitted over the air, i.e. the SDU of the RLC layer has been handed over from the communication device to the air, e.g.: the bottom layer of the communication device finishes transmitting the SDU, or the radio frequency unit of the communication device finishes transmitting the SDU, etc.

In addition, the above-mentioned bottom layer may be a protocol layer below the RLC layer, for example: medium access control (Media Access Control, MAC) layer.

Step 202, if an SDU is transmitted to the bottom layer or has been transmitted over the air, deleting the SDU buffered in the RLC layer according to a configuration instruction or a service type.

The deleting the SDU buffered in the RLC layer according to the configuration instruction may be deleting the SDU buffered in the RLC layer if the communication device configures the configuration instruction, and if the SDU is sent to the bottom layer or has been sent over the air interface. The configuration instruction may be a configuration instruction capable of instructing the communication device to perform out-of-order delivery, for example: a configuration indication indicating that the packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer of the communication device is capable of sequence delivery, or the configuration indication may be an indication indicating that the communication device may delete the SDU deletion described above in the case of step 202, or the like.

And deleting the SDU buffered in the RLC layer according to the service type may be deleting the SDU buffered in the RLC layer if the SDU is transmitted to the bottom layer or has been transmitted over the air in the case that the service of the SDU is a specific service type. For example: low latency traffic types, or traffic types requiring different quality of service, or traffic types predefined in the protocol, etc.

In addition, the SDU in step 201 may be an unsegmented SDU, or the SDU in step 201 may be one or more segments of an SDU. If one or more segments are sent to the bottom layer or have been sent over the air, step 201 may be to delete all segments of the SDU buffered by the RLC layer or to delete the corresponding segments (delete only segments sent to the bottom layer or have been sent over the air).

Through the steps, after the SDU of the RLC layer is sent to the bottom layer or is sent on an air interface, the SDU of the RLC layer cached by the RLC layer can be deleted, so that the cache space of the RLC layer is saved, and the normal delivery of other data of the RLC layer is further ensured.

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

Note that if the SDU is not transmitted to the bottom layer or is not transmitted over the air, the flow may be ended, or the flow may be executed for the next SDU, which is not limited thereto.

The above 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 above method may be applied to a 5G system, but is not limited thereto, so long as substantially the same function can be implemented, and the method is applicable to other communication systems, for example: a 4G or 6G system or other communication system employing system information blocks, etc. may be applied.

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

step 301, judging whether an SDU of the RLC layer is transmitted to the bottom layer or has been transmitted over the air;

Step 302, if an SDU is sent to the bottom layer or has been sent over the air, deleting the SDU buffered in the RLC layer according to a configuration instruction or a service type.

As an alternative embodiment, the configuration indication includes:

a configuration indication of the communication device, a configuration indication of a radio bearer of the communication device, a configuration indication of a service data adaptation protocol (Service Data Adaptation Protocol, SDAP) layer, a configuration indication of a PDCP layer, a configuration indication of an RLC layer, or a configuration indication of a medium access control (Media Access Control, MAC) layer.

The configuration instruction of the communication device may be a configuration instruction of a plurality of or all radio bearers of the communication device, and the configuration instruction of the radio bearers of the communication device may be a configuration instruction of the radio bearers.

In this embodiment, the configuration instruction may be configured for different layers of the communication device, so that flexibility of processing SDUs may be improved, and complexity of the communication device may also be reduced, for example: the configuration indication is a configuration indication of the communication device such that it is not necessary to configure the configuration indication for each radio bearer or for different protocol layers of the radio bearers.

As an alternative embodiment, the configuration indication includes:

a reordering timer, an out-of-order delivery indication, or a deletion indication;

wherein the SDU buffered by the RLC layer is deleted if the value of the reordering timer is 0 or less than or equal to a specific threshold; or alternatively

And deleting the SDU cached by the RLC layer when the configuration indication comprises the out-of-order delivery indication or the deletion indication, wherein the deletion indication is used for indicating that the SDU cached by the RLC layer is deleted when the SDU is sent to a bottom layer or is sent on an empty port.

The reordering timer may be a reordering timer for the communication device, or for a bearer of the communication device, or for a protocol layer, for example: is a PDCP reordering timer (T reordering timer). The specific threshold may be predefined in the protocol, or may be network configured, or may be preset by the communication device, etc.

And the out-of-order delivery indication (out Of Order Delivery) may be used to indicate that the communication device may deliver out-of-order.

In this embodiment, since the value of the reordering timer is 0, or equal to the specific threshold, or the configuration instruction includes the out-of-order delivery instruction, or the configuration instruction includes the deletion instruction, step 302 may delete the SDU, thereby improving the flexibility of processing the SDU.

In addition, since data transmission is performed between a plurality of devices in practical use, for example: the communication device is used as the SDU transmitting end, and the other devices are used as the SDU receiving ends, and if the communication device is configured with the configuration instruction, the receiving ends are also configured with the configuration instruction, so that the transmitting end and the receiving ends process data in the same mode. Thus, in the case where the communication device is configured with the configuration indication, the communication device can determine that the receiving end is also configured with the configuration indication, that is, determine that the receiving end can submit data out of order, so that the communication device can delete the SDU in the case of step 302. Because the receiving end can deliver out of order, the delivery of other data is not affected under the condition that the SDU is not received. For example: segment 2 of the SDU has been transmitted over the air, and the communication device deletes the segment buffered in the RLC layer, so that even if the receiving end does not successfully receive the segment, normal delivery of other segments is not affected.

It should be noted that, the configuration instruction of the communication device, the configuration instruction of the radio bearer of the communication device, or the configuration instruction of each protocol layer described in the foregoing embodiment may include the reordering timer, the out-of-order delivery instruction, or the deletion instruction, and may achieve the same beneficial effects.

As an optional implementation manner, the service includes the SDU, and the service type includes at least one of the following:

QCI, quality of service Flow identity (QFI), minimum latency requirements, access identity (access identity) and access type (access categories) of the service.

The service here may be a service to which the SDU belongs.

In this embodiment, the service may be classified according to QCI, QFI, minimum delay requirement, access identifier and access type, so that whether to delete the SDU buffered in the RLC layer may be determined according to at least one of the service QCI, QFI, minimum delay requirement, access identifier and access type of the SDU, thereby improving flexibility in processing the SDU.

Optionally, in this embodiment, deleting the SDU buffered in the RLC layer according to the service type includes:

if the QCI is the preset QCI, deleting the SDU cached by the RLC layer; or alternatively

If the QFI is the preset QFI, deleting the SDU cached by the RLC layer; or alternatively

If the minimum delay requirement is smaller than or equal to a preset delay threshold, deleting the SDU cached by the RLC layer; or alternatively

If the access identifier is a preset access identifier, deleting the SDU cached by the RLC layer; or alternatively

And if the access type is a preset access type value, deleting the SDU cached by the RLC layer.

The preset QCI, the preset QFI, the preset delay threshold, the preset access identifier, and the preset access type value may be predefined in a protocol, configured by a network, or preset by a communication device, which is not limited. In addition, in this embodiment, the preset QCI may be any QCI in a preset QCI set, for example: the communication device presets QCI1 with a value of 1, QCI2 with a value of 2, and QCI3 with a value of 3, so that when the QCI of the service is any one of the 3 QCIs, the SDU buffered in the RLC layer can be deleted. Similarly, the preset QFI, the preset delay threshold, the preset access identifier, and the preset access type value may be any one of preset corresponding sets, which are not described herein.

In this embodiment, the deletion of the SDU buffered in the RLC layer under any of the above conditions may be implemented, thereby improving the flexibility of processing SDUs.

As an optional implementation manner, the service type includes RLC entity of service mapping, and deleting the SDU buffered by the RLC layer according to the service type includes:

And deleting the SDU cached by the RLC entity according to the RLC entity mapped by the service, wherein the service comprises the SDU.

In this embodiment, the service may be classified according to the RLC entity mapped to the service, so that the SDU buffered by the RLC entity is deleted according to the RLC entity mapped to the service. The deleting the SDU buffered by the RLC entity according to the service mapping may be deleting the SDU buffered by the RLC entity if the RLC entity of the service mapping is a specific RLC entity or a pre-designated RLC entity. For example: the RLC entity may be an RLC entity of a radio bearer of a particular service type, for example: RLC entities of radio bearers for traffic with QCI equal to 2, or RLC entities of radio bearers for traffic with minimum delay requirement less than or equal to a preset delay threshold, etc. The pre-specified RLC entity may be a pre-defined RLC entity in a protocol, or a network configured RLC entity or the like.

In this embodiment, the RLC entity performing SDU deletion according to the service mapping may be implemented, so that no other indication needs to be configured, so as to reduce complexity of the communication device.

As an alternative embodiment, the transmission mode of the SDU is TM, UM or AM.

In this embodiment, the deletion of the SDU buffered in the RLC layer according to the configuration instruction or the service type may be implemented in TM, UM or AM, so that the RLC layer buffer space may be further saved.

As an optional implementation manner, if an SDU is sent to the bottom layer or has been sent over the air, deleting the SDU buffered by the RLC layer according to a configuration instruction or a service type, including:

and deleting the at least one segment cached by the RLC layer according to a configuration instruction or a service type if the at least one segment of the SDU is sent to the bottom layer or is sent on an empty port.

By the method, after one or more segments are sent to the bottom layer or sent on the air interface, the segments sent to the bottom layer or sent on the air interface can be deleted, so that the effect of saving the cache space is achieved, and normal delivery of other data of the RLC layer is further ensured. For example: an SDU comprises a segment a, a segment b and a segment c, which may be transmitted to the base layer at segment a or already transmitted over the air, a segment a buffered in the RLC layer, or may be transmitted to the base layer at segment a and segment b or already transmitted over the air, a segment a buffered in the RLC layer and a segment b.

In this embodiment, the foregoing steps may be implemented when the instruction information sent by the higher layer to discard the SDU of the RLC layer is not received, and the segment that has been sent to the bottom or has been sent in the air interface in the RLC layer buffer is deleted, so as to achieve the effect of saving the buffer space, and further ensure normal delivery of other data of the RLC layer. In addition, since the indication information does not need to be sent by a high layer, transmission inside the communication device can be saved, so that the power consumption of the communication device can be reduced.

In this embodiment, the deleting the at least one segment of the RLC layer buffer according to the configuration indication or the service type may refer to the embodiment of deleting the SDU of the RLC layer buffer according to the configuration indication or the service type described above, which is not described herein, and may achieve the same beneficial effects.

and if the RLC layer receives the indication information sent by the upper layer and indicating to discard the SDU and at least one segment of the SDU is sent to the bottom layer or is sent on an empty port, deleting all segments of the SDU cached by the RLC layer according to the configuration indication or the service type.

In this embodiment, the execution order of receiving the above indication information and determining whether the SDU of the RLC layer is transmitted to the bottom layer or has been transmitted over the air is not limited, that is, determining whether the SDU is transmitted to the bottom layer or has been transmitted over the air and receiving the discard indication of the higher layer are not strictly time-sequential. For example: the method may determine whether the SDU of the RLC layer is transmitted to the bottom layer or has been transmitted over the air when the above indication information is received, or may determine whether the SDU of the RLC layer is transmitted to the bottom layer or has been transmitted over the air first, and then discard the SDU when the RLC layer receives the indication information indicating to discard the SDU of the RLC layer transmitted by the higher layer.

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

By the steps, when the instruction information sent by the high layer and used for discarding the SDU of the RLC layer is received, deleting operation is performed, and deleting operation is performed based on the instruction information sent by the high 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 for the RLC layer to make a erasure decision than the RLC layer. In addition, since all segments of the SDU buffered by the RLC layer can be deleted as long as at least one segment of the SDU is transmitted to the bottom layer or has been transmitted over the air, it is possible to improve the processing efficiency and save the power consumption of the communication device because it is not necessary to perform a judgment procedure once for each segment.

Optionally, the method comprises the steps of. The method further comprises the steps of:

step 303, sending a notification message to the receiving end, wherein the notification message is used for notifying that the SDU is discarded.

In this embodiment, if the SDU of the RLC layer is discarded, a notification message may be sent to the receiving end to notify the receiving end that the SDU of the RLC layer has been discarded by the transmitting end, so that the receiving end may cancel the related operation for the SDU of the RLC layer, to avoid that the receiving end does not receive the SDU and waits all the time, thereby saving power consumption of the receiving end and improving data processing performance of the receiving end.

In this embodiment, a plurality of optional implementations are added on the basis of the embodiment shown in fig. 2, and the buffer space of the RLC layer can be saved, and the advantages of improving the flexibility of deleting the SDU buffered in the RLC layer, 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 can be also achieved.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present invention, and as shown in fig. 4, a communication device 400 includes:

a judging module 401, configured to judge whether an SDU of the RLC layer is transmitted to the bottom layer or has been transmitted over the air;

and a deleting module 402, configured to delete the SDU buffered in the RLC layer according to a configuration instruction or a service type if the SDU is sent to the bottom layer or has been sent over the air.

Optionally, the configuration indication includes:

a configuration indication of the communication device, a configuration indication of a radio bearer of the communication device, a configuration indication of an SDAP layer, a configuration indication of a PDCP layer, a configuration indication of an RLC layer, or a configuration indication of a MAC layer.

Optionally, the configuration indication includes:

Optionally, the service includes the SDU, and the service type includes at least one of the following:

QCI, QFI, minimum delay requirement, access identity and access type of the service.

Optionally, the deleting the SDU buffered by the RLC layer according to the service type includes:

Optionally, the service type includes a service mapped RLC entity, and the deletion module is configured to delete the SDU buffered by the RLC entity according to the service mapped RLC entity if the SDU is transmitted to the bottom layer or has been transmitted over the air, where the service includes the SDU.

Optionally, the transmission mode of the SDU is TM, UM or AM.

Optionally, the deleting module is configured to delete the at least one segment buffered in the RLC layer according to a configuration instruction or a service type if the at least one segment of the SDU is sent to the bottom layer or has been sent over the air.

Optionally, the deletion module is configured to delete all segments of the SDU buffered by the RLC layer according to a configuration instruction or a service type if the RLC layer receives an instruction sent by a higher layer to discard the SDU and at least one segment of the SDU is sent to a bottom layer or has been sent over an air interface.

Optionally, as shown in fig. 5, the communication device 400 further includes:

a sending module 403, configured to send a notification message to the receiving end, where the notification message is used to notify that the SDU is discarded.

The communication device provided in the embodiment of the present invention can implement each process implemented by the mobile terminal in the method embodiments of fig. 2 to 3, and in order to avoid repetition, a description is omitted here. The communication device may save buffer space of the RLC layer.

Figure 6 is a schematic diagram of a hardware architecture of a communication device implementing various embodiments of the present invention,

the communication device 600 includes, but is not limited to: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, processor 610, and power supply 611. It will be appreciated by those skilled in the art that the communication device structure shown in fig. 6 is not limiting of the communication device and that the communication device may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the communication equipment comprises, 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.

Wherein, the processor 610 is configured to determine whether an SDU of the radio link layer control protocol RLC layer is transmitted to the bottom layer or has been transmitted over the air interface;

Optionally, the configuration indication includes:

a configuration indication of the communication device, a configuration indication of a radio bearer of the communication device, a configuration indication of an SDAP layer, a configuration indication of a PDCP layer, a configuration indication of an RLC layer, or a configuration indication of a medium access control MAC layer.

Optionally, the configuration indication includes:

Optionally, the deleting, by the processor 910, the SDU buffered by the RLC layer according to a service type includes:

Optionally, the service type includes an RLC entity of a service map, and deleting, by the processor 610, the SDU buffered by the RLC layer according to the service type includes:

Optionally, the transmission mode of the SDU is TM, UM or AM.

Optionally, if the SDU is sent to the bottom layer or has been sent over the air, the processor 610 deletes the SDU buffered in the RLC layer according to a configuration instruction or a service type, including:

Optionally, after the deleting all segments of the SDU buffered by the RLC layer, the radio frequency unit 601 is configured to:

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

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

It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used to receive and send information or signals during a call, specifically, receive downlink data from a base station, and then process the downlink data with the processor 610; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 601 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 601 may also communicate with networks and other devices through a wireless communication system.

The communication device provides wireless broadband internet access to the user via the network module 602, such as helping the user to send and receive e-mail, browse web pages, and access streaming media, etc.

The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 may also provide audio output (e.g., call signal reception sound, message reception sound, etc.) related to a specific function performed by the communication device 600. The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used for receiving audio or video signals. The input unit 604 may include a graphics processor (Graphics Processing Unit, GPU) 6041 and a microphone 6042, the graphics processor 6041 processing image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphics processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. Microphone 6042 may receive sound and can process such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 601 in the case of a telephone call mode.

The communication device 600 also includes at least one sensor 605, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 6061 and/or the backlight when the communication device 600 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for identifying the gesture of the communication equipment (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration identification related functions (such as pedometer and knocking), and the like; the sensor 605 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.

The display unit 606 is used to display information input by a user or information provided to the user. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 607 is operable to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the communication device. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on touch panel 6071 or thereabout using any suitable object or accessory such as a finger, stylus, or the like). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch azimuth 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 detection device and converts it into touch point coordinates, which are then sent to the processor 610, and receives and executes commands sent from the processor 610. In addition, the touch panel 6071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein.

Further, the touch panel 6071 may be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation thereon or thereabout, the touch operation is transmitted to the processor 610 to determine a type of a touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although in fig. 6, the touch panel 6071 and the display panel 6061 are two independent components for implementing the input and output functions of the communication device, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to implement the input and output functions of the communication device, which is not limited herein.

The interface unit 608 is an interface to which an external device is connected to the communication apparatus 600. For example, the external devices may include a wired or wireless headset port, an external power (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 608 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 600 or may be used to transmit data between the communication apparatus 600 and an external device.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a storage program area that may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory 609 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 610 is a control center of the communication device and connects various parts of the entire communication device using various interfaces and lines, performs various functions of the communication device and processes data by running or executing software programs and/or modules stored in the memory 609 and invoking data stored in the memory 609, thereby performing overall monitoring of the communication device. The processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The communication device 600 may further include a power supply 611 (such as a battery) for powering the various components, and preferably the power supply 611 may be logically connected to the processor 610 by a power management system, such as to perform functions such as managing charging, discharging, and power consumption by the power management system.

In addition, the communication device 600 includes some functional modules, which are not shown, and will not be described herein.

Preferably, the embodiment of the present invention further provides a communication device, including a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program when executed by the processor 610 implements each process of the foregoing SDU processing method embodiment, and the same technical effects can be achieved, so that repetition is avoided and redundant description is omitted herein.

The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the processes of the above-mentioned SDU processing method embodiment, and can achieve the same technical effects, so that repetition is avoided and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

1. A method for processing service data units SDUs, applied to a communication device, comprising:

judging whether SDU of radio link layer control protocol RLC layer is sent to bottom layer or has been sent on air interface;

if SDU is sent to the bottom layer or has been sent on the air interface, deleting the SDU cached by the RLC layer according to configuration indication or service type;

if the SDU is sent to the bottom layer or has been sent over the air, deleting the SDU buffered in the RLC layer according to a configuration instruction or a service type, including:

if the RLC layer receives the indication information sent by the higher layer and indicating discard of the SDU, and at least one segment of the SDU is sent to the bottom layer or has been sent on the air interface, deleting all segments of the SDU buffered by the RLC layer according to the configuration indication or the service type;

After the deleting all segments of the SDU buffered by the RLC layer, the method further comprises:

2. The method of claim 1, wherein the configuration indication comprises:

the configuration indication of the communication device, the configuration indication of the radio bearer of the communication device, the configuration indication of the service data adaptation protocol SDAP layer, the configuration indication of the packet data convergence protocol PDCP layer, the configuration indication of the RLC layer or the configuration indication of the media access control MAC layer.

3. The method of claim 1 or 2, wherein the configuration indication comprises:

4. The method of claim 1, wherein traffic comprises the SDUs, and the traffic type comprises at least one of:

the service quality class identifier QCI, the service quality flow identifier QFI, the minimum delay requirement, the access identifier and the access type of the service.

5. The method of claim 4, wherein the deleting the SDU buffered by the RLC layer according to a service type comprises:

6. The method of claim 1, wherein the service type comprises a service mapped RLC entity, and the deleting the SDU buffered by the RLC layer according to the service type comprises:

7. The method of claim 1, wherein the transmission mode of the SDU is a transparent mode TM, a non-acknowledgement mode UM or an acknowledgement mode AM.

8. The method of claim 1, 2, 4, 5, 6, or 7, wherein deleting the SDU buffered by the RLC layer according to a configuration indication or a service type if the SDU is transmitted to the bottom layer or has been transmitted over an air interface comprises:

9. A communication device, comprising:

a deleting module, configured to delete an SDU buffered in the RLC layer according to a configuration instruction or a service type if the SDU is sent to the bottom layer or has been sent over an air interface;

the deleting module is configured to delete all segments of the SDU buffered by the RLC layer according to a configuration instruction or a service type if the RLC layer receives an instruction sent by a higher layer to discard the instruction information of the SDU and at least one segment of the SDU is sent to a bottom layer or has been sent over an air interface;

The communication device further includes:

and the sending module is used for sending a notification message for notifying the discard of the SDU to the receiving end.

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

11. The communication device of claim 9 or 10, wherein the configuration indication comprises:

12. The communication device of claim 9, wherein traffic comprises the SDUs, and wherein the traffic type comprises at least one of:

13. The communication device of claim 12, wherein the deleting the SDU buffered by the RLC layer according to a service type comprises:

14. The communication device of claim 9, wherein the service type comprises a service mapped RLC entity, and wherein the deletion module is configured to delete an SDU buffered by the RLC entity based on the service mapped RLC entity if the SDU is transmitted to the bottom layer or has been transmitted over the air, wherein the service comprises the SDU.

15. The communication device of claim 9, wherein the transmission mode of the SDU is TM, UM or AM.

16. The communication device of claim 9, 10, 12, 13, 14 or 15, wherein the deletion module is configured to delete at least one segment buffered by the RLC layer based on a configuration indication or a type of service if the at least one segment is transmitted to a bottom layer or has been transmitted over an air interface.

17. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, performs the steps in the method of processing SDUs according to any of claims 1 to 8.

18. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of processing SDUs according to any one of claims 1 to 8.