CN112865930A

CN112865930A - Method, related device and system for sending polling message

Info

Publication number: CN112865930A
Application number: CN201911185742.5A
Authority: CN
Inventors: 耿瑞全; 李�瑞; 贺家旺
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd; Shanghai Huawei Technologies Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-05-28

Abstract

The embodiment of the application discloses a method, a related device and a system for sending a polling message, which are used for triggering a receiving end RLC layer to feed back an RLC status report in time. The method in the embodiment of the application comprises the following steps: the RLC layer controls the MAC layer to send data to a receiving end through media access according to a preset sending window; when the MAC layer fails to send data to the receiving end, the RLC layer receives a first message from the MAC layer, and then the RLC layer sends a polling message to the receiving end through the MAC layer according to the first message. Therefore, when the MAC layer fails to send data to the receiving end, the RLC layer can receive the RLC status report in time, so that data retransmission can be carried out according to the RLC status report, and retransmission delay is reduced.

Description

Method, related device and system for sending polling message

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a related apparatus, and a system for sending a polling packet.

Background

Radio Link Control (RLC) is a Radio Link Control layer protocol in a wireless communication system. In a communication system, the RLC layer is located above the Media Access Control (MAC) layer and is part of layer two (L2).

After the sending end sends data to the receiving end, the RLC layer of the sending end sends a polling message to the RLC layer of the receiving end, the polling message triggers the RLC layer of the receiving end to feed back an RLC status report, and the RLC layer of the sending end can clearly know the data receiving condition of the RLC layer of the receiving end through the RLC status report, so that next operation can be executed according to the data receiving condition, for example, for data which is not received by the RLC layer of the receiving end, the RLC layer of the sending end can retransmit in time.

Therefore, in order to trigger the RLC layer at the receiving end to feed back the RLC status report in time, a method of sending a polling packet is needed.

Disclosure of Invention

The embodiment of the application provides a method, a related device and a system for sending a polling message, which can trigger a receiving end RLC layer to feed back an RLC status report in time.

A first aspect of the present application provides a method for sending a polling packet, including:

the radio link control RLC layer transmits data to a receiving end through a medium access control MAC layer according to a preset transmission window, and the size of the transmission window is generally fixed.

When the MAC layer fails to transmit data to the receiving end, the RLC layer receives a first message from the MAC layer, where the first message is used to indicate that the transmission of data to the receiving end fails.

Then, the RLC layer sends a polling message to the receiving end through the MAC layer according to the first message.

The RLC layer sends the polling message to the receiving end according to the first message, so that when the MAC layer fails to send data to the receiving end, the RLC status report can be received in time, data retransmission can be carried out according to the RLC status report, and retransmission delay is reduced.

Based on the first aspect, an embodiment of the present application further provides a first implementation manner of the first aspect:

after transmitting data to a receiving end through a Media Access Control (MAC) layer according to a preset transmitting window, determining the residual size of the transmitting window by an RLC layer, wherein the residual size of the transmitting window is used for representing the data quantity which can be added to the transmitting window;

and if the residual size of the sending window is smaller than the preset size, the RLC layer sends a polling message to the receiving end through the MAC layer.

When the remaining size of the sending window is smaller than the preset size, the RLC layer can determine the data which has been successfully received by the receiving end in time by triggering of the polling message, so that the part of the data can be removed from the sending window to increase the remaining size of the sending window, thereby avoiding that the transmission of the data is affected by the undersize of the remaining size of the sending window, and particularly avoiding that the data is interrupted because the remaining size of the sending window is zero.

Based on the first implementation manner of the first aspect, the present application provides a second implementation manner of the first aspect:

determining the remaining size of the transmission window comprises: the remaining size of the transmission window is determined according to the number of allowed protocol data units, PDUs, to be added in the transmission window.

This embodiment provides a feasible scheme for determining the remaining size of the transmission window, so that the RLC layer can accurately determine the remaining size of the transmission window.

Based on the first aspect, or based on the first implementation manner of the first aspect, or based on the second implementation manner of the first aspect, an embodiment of the present application further provides a third implementation manner of the first aspect:

if the number of the PDUs transmitted to the receiving end is larger than a preset second number, transmitting a polling message to the receiving end through an MAC layer;

and/or

And if the byte number of the data sent to the receiving end is larger than the preset byte number, sending a polling message to the receiving end through the MAC layer.

The sending of the polling message is triggered by judging the number of the sent PDUs and the number of bytes of the sent data, so that the RLC status report can be received in time when the MAC layer fails to send the data to the receiving end but the sent data amount is large.

A second aspect of the present application provides a method for sending a polling packet, including:

Then the RLC layer determines the remaining size of the transmission window, wherein the remaining size of the transmission window is used for representing the data quantity which can be added to the transmission window;

Based on the second aspect, the embodiments of the present application further provide a first implementation manner of the second aspect:

Based on the second aspect or based on the first implementation manner of the second aspect, the present application also provides a second implementation manner of the second aspect:

and/or

The sending of the polling message is triggered by judging the number of the sent PDUs and the number of bytes of the sent data, so that the RLC status report can be received in time when the remaining size of the sending window is large but the sent data amount is large.

A third aspect of the present embodiment provides a method for sending a polling packet, including:

the MAC layer receives data from the radio link control RLC layer first and then sends the data to a receiving end;

in the process of sending data, the MAC layer determines that the data sending to the receiving end fails;

at this time, the MAC layer sends a first message to the RLC layer, wherein the first message is used for indicating the RLC layer to send a polling message to a receiving end;

then, the MAC layer receives the polling packet from the RLC layer, and finally sends the polling packet to the receiving end.

When the data transmission to the receiving end fails, the MAC layer transmits a polling message to the RLC layer to trigger the RLC layer to transmit an RLC status report, so that the data is retransmitted according to the RLC status report, and the retransmission time delay is reduced.

Based on the third aspect, the embodiments of the present application further provide a first implementation manner of the third aspect: determining that sending data to the receiving end failed comprises:

and if the MAC layer receives a second message corresponding to the data from the receiving terminal and the second message carries indication information, determining that the data transmission to the receiving terminal fails, wherein the indication information is used for indicating that the receiving terminal does not receive the data.

The embodiment provides a feasible scheme for determining the failure of sending data to the receiving end, that is, the failure of sending data to the receiving end can be determined according to the indication information in the second message fed back by the receiving end.

Based on the third aspect, the embodiments of the present application further provide a second implementation manner of the third aspect: determining that sending data to the receiving end failed comprises:

and if the second information corresponding to the data from the receiving end is not received within the preset time, determining that the data is failed to be sent to the receiving end.

This embodiment provides another possible scheme for determining that data transmission to the receiving end fails, that is, if the receiving end does not feed back the second message within a preset time, the MAC layer may consider that data transmission to the receiving end fails.

A fourth aspect of the embodiments of the present application provides a radio link control entity, including:

a sending unit, configured to send data to a receiving end through a media access control MAC layer according to a preset sending window;

a receiving unit, configured to receive a first message from an MAC layer, where the first message is used to indicate that data transmission to a receiving end fails;

and the sending unit is also used for sending the polling message to the receiving end through the MAC layer according to the first message.

Based on the fourth aspect, an embodiment of the present application further provides a first implementation manner of the fourth aspect, where the radio link control entity further includes:

a processing unit for determining a remaining size of the transmission window;

and the sending unit is also used for sending the polling message to the receiving end through the MAC layer when the residual size of the sending window is smaller than the preset size.

Based on the first implementation manner of the fourth aspect, an embodiment of the present application further provides a second implementation manner of the fourth aspect, and the processing unit is further configured to determine a remaining size of the transmission window according to the number of PDUs allowed to be added in the transmission window.

Based on the fourth aspect, or based on the first implementation manner of the fourth aspect, or based on the second implementation manner of the fourth aspect, the present application provides a third implementation manner of the fourth aspect:

the sending unit is further configured to:

when the number of the PDUs transmitted to the receiving end is larger than a preset second number, transmitting a polling message to the receiving end through an MAC layer;

and/or

And when the byte number of the data sent to the receiving end is larger than the preset byte number, sending a polling message to the receiving end through the MAC layer.

A fifth aspect of the embodiments of the present application provides a radio link control entity, including:

a processing unit for determining a remaining size of the transmission window;

Based on the fifth aspect, the embodiments of the present application further provide a first implementation manner of the fifth aspect:

and the processing unit is also used for determining the residual size of the sending window according to the number of the Protocol Data Units (PDU) allowed to be added in the sending window.

Based on the fifth aspect or based on the first implementation manner of the fifth aspect, the present application also provides a second implementation manner of the fifth aspect:

the sending unit is further configured to:

and/or

A sixth aspect of the present embodiment provides a medium access control entity, including:

a transmitting unit for transmitting data from a radio link control, RLC, layer to a receiving end;

the processing unit is used for determining that the data transmission to the receiving end fails;

the sending unit is further configured to send a first message to the RLC layer, where the first message is used to instruct the RLC layer to send a polling packet to the receiving end;

and the sending unit is also used for sending the polling message from the RLC layer to the receiving end.

Based on the sixth aspect, an embodiment of the present application further provides the first implementation manner of the sixth aspect, where the processing unit is configured to:

and if a second message corresponding to the data from the receiving terminal is received and the second message carries indication information, determining that the data transmission to the receiving terminal fails, wherein the indication information is used for indicating that the receiving terminal does not receive the data.

A seventh aspect of the embodiments of the present application provides a terminal device, including: at least one processor and a memory, the memory storing computer-executable instructions operable on the processor, the terminal device performing the method of sending polling messages as described in any of the first to third aspects above when the computer-executable instructions are executed by the processor.

An eighth aspect of the embodiments of the present application provides a communication apparatus, including: at least one processor and a memory, the memory storing computer-executable instructions executable on the processor, the communications apparatus performing the method of transmitting polling messages as described in any of the first to third aspects above when the computer-executable instructions are executed by the processor.

A ninth aspect of an embodiment of the present application provides a communication system, including: a sending end and a receiving end;

the sending end is configured to perform the method for sending a polling packet according to any one of the first to third aspects.

A tenth aspect of embodiments of the present application provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method for sending a polling packet according to any one of the first to third aspects.

An eleventh aspect of embodiments of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the method for sending a polling packet according to any one of the first to third aspects.

A twelfth aspect of the present embodiment provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or an instruction to execute the method for sending a polling packet according to any one of the first to third aspects.

The communication interface in the chip may be an input/output interface, a pin, a circuit, or the like.

Based on the twelfth aspect, the present application provides a first implementation manner of the twelfth aspect, and the chip or the chip system described above in the present application further includes at least one memory, where the at least one memory stores instructions. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or may be a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

According to the technical scheme, the embodiment of the application has the following advantages:

the RLC layer firstly controls the MAC layer to send data to a receiving end through a media access according to a preset sending window; in the process of sending data, if a first message from the MAC layer is received and the first message is used for indicating that the data sending to the receiving end fails, sending a polling message to the receiving end through the MAC layer according to the first message, so that when the data sending to the receiving end fails, the receiving end can be triggered to feed back an RLC status report through the polling message in time, the data can be retransmitted according to the RLC status report, and the retransmission time delay is reduced.

Drawings

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

fig. 2 is a layered schematic diagram of a wireless access system according to an embodiment of the present application;

fig. 3 is a schematic diagram of a first embodiment of a method for sending a polling packet in an embodiment of the present application;

fig. 4 is a schematic diagram of a second embodiment of a method for sending a polling packet in the embodiment of the present application;

fig. 5 is a schematic diagram of a fourth embodiment of a method for sending a polling packet in the embodiment of the present application;

fig. 6 is a schematic diagram of an embodiment of a radio link control entity in the embodiment of the present application;

fig. 7 is a schematic diagram of another embodiment of a radio link control entity in the embodiment of the present application;

fig. 8 is a schematic diagram of an embodiment of a medium access control entity in an embodiment of the present application;

fig. 9 is a schematic diagram of an embodiment of a terminal device according to an embodiment of the present application;

fig. 10 is a schematic diagram of an embodiment of a communication device according to an embodiment of the present application.

Detailed Description

The embodiment of the present application can be applied to the architecture of a communication system as shown in fig. 1, where the communication system includes at least one base station and at least one terminal device, and only one base station and two terminal devices in the coverage area of the base station are shown in the figure. The base station provides wireless access service for a plurality of terminal devices in the coverage area of the base station, and the terminal devices can communicate with the base station through links.

In the embodiment of the present application, the communication system may be various Radio Access Technology (RAT) systems, such as a Code Division Multiple Access (CDMA) system, a Time Division Multiple Access (TDMA) system, a Frequency Division Multiple Access (FDMA) system, an Orthogonal Frequency Division Multiple Access (OFDMA) system, a single carrier FDMA (SC-FDMA) system and other systems. The terms "system" and "network" are used interchangeably. Furthermore, the communication system 100 may also be applicable to 5G systems and future-oriented communication technologies, such as 6G systems.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not limit the technical solution provided by the embodiment of the present application. As can be known to those skilled in the art, with the evolution of network architecture and the emergence of new service scenarios, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

In the embodiment of the present application, a base station is an apparatus deployed in a radio access network to provide a wireless communication function for a terminal device. The base stations may include various forms of macro base stations, micro base stations (which may also be referred to as small stations), relay stations, access points, and the like. In systems using different radio access technologies, names of devices having a base station function may be different, and the devices may be evolved nodes (eNB or e-NodeB) in LTE, or transmit-receive points (TRP) or gNodeB in 5G systems. For convenience of description, in the embodiments of the present application, the above-described apparatuses providing a wireless communication function for a terminal device are collectively referred to as a base station.

The terminal device related in this embodiment may include various terminal devices, which have a wireless communication function, may communicate with one or more core networks through a Radio Access Network (RAN), and provide voice and/or data connectivity for a user, and may be referred to as a terminal for short. May be a handheld device with wireless communication capabilities, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem. The terminal device in the embodiment of the present application may also be referred to as a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), a user device (user device), a Personal Communication Service (PCS) phone, a cordless phone, a mobile phone, a cellular phone, a smart phone (smart phone), a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and other devices.

In the communication process, the terminal equipment and the base station can be used as a sending end and a receiving end; specifically, when the terminal device is used as a sending end, the base station is used as a receiving end; when the base station is used as the transmitting end, the base station is used as the receiving end.

As shown in fig. 2, in the layered schematic diagram of the wireless Access system in this embodiment, Layer one (L1) is a Physical Layer (PHY), Layer two (L2) includes a Packet Data Convergence Protocol (PDCP) Layer, a Radio Link Control (RLC) Layer, and a Media Access Control (MAC) Layer, and Layer three (L3) is a Radio Resource Control (RRC) Layer.

The RLC layer is mainly used for segmenting data from the PDCP layer, correcting errors by an Automatic Repeat Request (ARQ), and performing reordering, duplicate packet detection, and re-segmentation on the data from the MAC layer. The MAC layer is mainly used for matching logical channels and transport channels, multiplexing and demultiplexing of logical channels, HARQ error correction, scheduling information reporting, random access process processing, logical channel priority processing, and the like.

As shown in fig. 2, in the terminal device, data may sequentially pass through the PDCP layer, the RLC layer, the MAC layer, and the physical layer, and is finally transmitted to the base station, and in the base station, data may sequentially pass through the physical layer, the MAC layer, the RLC layer, and the PDCP layer, and is finally transmitted to the upper layer.

It should be noted that the above-mentioned hierarchical structure of the wireless access system is only a logical structure, and the functions of each hierarchical structure can be implemented by a processor running code.

In a communication process, after a sending end sends data to a receiving end, an RLC layer of the sending end sends a polling message to the RLC layer of the receiving end, where the polling message triggers the RLC layer of the receiving end to feed back an RLC status report. It is to be understood that the embodiments described are only a few embodiments of the present application and 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.

Referring to fig. 3, a first embodiment of a method for sending a polling packet in the embodiment of the present application is shown. As shown in fig. 3, a first embodiment of a method for sending a polling packet is provided in this application, and is applied to a sending end, where the method includes:

in operation 101, the RLC layer sends data to the receiving end through the MAC layer according to a preset sending window.

In the RLC layer of the sending end, a sending window is preset, and the sending window corresponds to a fixed size, and the size represents the amount of data that the sending window can accommodate. Before data transmission, the RLC layer adds data to a transmission window in the form of a protocol data unit PDU, then sequentially transmits a plurality of PDUs in the transmission window, removes the received PDU from the transmission window when it is determined that a receiving end has received the PDU, and then continuously adds a new PDU to the transmission window. Therefore, two types of PDUs are mainly contained in the transmission window: PDUs that have been transmitted but have not been determined to have been received by the receiving end, and PDUs that are scheduled to be transmitted but have not been transmitted.

As can be seen from fig. 2, at the transmitting end, the RLC layer may first transmit data to the MAC layer, and accordingly, the MAC layer may receive the data, and then the MAC layer may transmit the data from the radio link control RLC layer to the receiving end, where the MAC layer may transmit the data to the receiving end through the physical layer.

It can be understood that the RLC layer may send data to the MAC in the form of protocol data units PDU, specifically, the RLC layer may send N PDUs to the MAC layer, where N is a positive integer, and after the MAC layer receives the N PDUs, the MAC layer packs the N PDUs into one or more data packets of the MAC layer, and then sends the data packets of the MAC layer to the receiving end.

In operation 102, the MAC layer determines that the transmission of the data to the receiving end fails.

After sending data from the RLC layer to the receiving end, the MAC layer determines whether the sending of the data to the receiving end is successful.

The failure of the MAC layer to send data to the receiving end includes multiple situations, for example, the failure of sending data to the receiving end due to the MAC layer itself, specifically, when a PDU from the RLC layer is lost in the MAC layer, the lost PDU is not received by the receiving end; for another example, a failure in transmitting data to the receiving end may be caused due to a link between the MAC layer of the transmitting end and the MAC layer of the receiving end, and particularly, when a signal of the link is poor, a failure in transmitting data to the receiving end may be caused.

In addition, the method for determining that the data transmission to the receiving end fails also includes multiple methods, which are not limited in the embodiment of the present application.

For example, determining that sending data to the receiver fails may include:

It should be noted that, after the MAC layer of the sending end sends data to the receiving end, the receiving end may feed back a second message, where the second message is used to indicate whether the receiving end successfully receives the data; specifically, the second message carries indication information, and when the indication information indicates that the receiving end does not receive the data, the MAC layer of the transmitting end may determine that the data transmission to the receiving end fails.

For another example, determining that the data transmission to the receiving end fails may further include:

and if the second message corresponding to the data from the receiving end is not received within the preset time, determining that the data transmission to the receiving end fails.

It should be noted that, in the previous example, it may be determined whether to fail to send data to the receiving end through the indication information, however, the MAC layer of the sending end may not receive the second message within the preset time due to some reasons, for example, when the receiving end does not send the second message to the MAC layer of the sending end, or the receiving end sends the second message to the MAC layer of the sending end, but the receiving end cannot receive the second message within the preset time due to possible reasons such as a link; at this time, the RLC layer may determine that data transmission to the receiving end fails.

In operation 103, the MAC layer transmits a first message to the RLC layer.

And when the MAC layer determines that the data transmission to the receiving end fails, the MAC layer transmits a first message to the RLC layer, wherein the first message is used for indicating that the data transmission to the receiving end fails and further indicating the RLC layer to transmit a polling message to the receiving end.

Accordingly, the RLC layer receives the first message from the MAC layer.

In operation 104, the RLC layer sends a polling packet to the receiving end through the MAC layer according to the first message.

After receiving the first message, the RLC layer may determine that the MAC layer fails to send data to the receiving end, but the RLC layer cannot specifically determine which PDU is not received by the receiving end, for example, the sending end RLC layer sends 10 PDUs to the receiving end through the MAC layer, and when the MAC layer fails to send data to the receiving end, 1 or more PDUs may fail to be sent, so to specifically determine PDUs which are not received by the receiving end, the RLC layer sends a polling packet to the receiving end through the MAC layer to trigger the receiving end RLC layer to feed back an RLC status report, so that PDUs which are not received by the receiving end may be determined according to the RLC status.

Specifically, the RLC layer sends the polling packet to the MAC layer, and then the MAC layer sends the polling packet from the RLC layer to the receiving end.

According to the embodiment of the application, the polling message is sent to the receiving end through the MAC layer according to the first message, so that when the data sending from the MAC layer to the receiving end fails, the receiving end can be triggered to feed back the RLC status report through the polling message in time, the data can be retransmitted according to the RLC status report, and the retransmission delay is reduced.

It should be noted that, because the embodiment of the present application can reduce the retransmission delay, the embodiment of the present application can be applied to a scenario with a high requirement on the retransmission delay; for example, a remote user means that a terminal device is far away from a base station, in this case, the signal quality between the terminal device and the base station is poor, so that the probability of failure of the MAC layer to transmit data to the receiving end is high, and when the MAC layer fails to transmit data to the receiving end, the RLC layer of the transmitting end is often required to retransmit the data which is failed to transmit as fast as possible.

In the above embodiment, the RLC layer sends the polling packet according to the first message of the MAC layer, and in addition, the RLC layer may send the polling packet to the receiving end according to the remaining size of the sending window, which will be described in detail below.

Referring to fig. 4, a diagram of a second embodiment of a method for sending a polling packet in an embodiment of the present application is shown. As shown in fig. 4, a second embodiment of a method for sending a polling packet is provided in this application, and is applied to a sending end, where the method includes:

in operation 201, the RLC layer sends data to the receiving end through the MAC layer according to a preset sending window.

It should be noted that operation 201 in the embodiment of the present application is the same as operation 101 in the first embodiment, and can be understood by referring to the related description of operation 101 in the first embodiment.

In operation 202, the RLC layer determines the remaining size of the transmission window.

It should be noted that there are various methods for determining the remaining size of the sending window, and this is not limited in the embodiment of the present application.

For example, determining the remaining size of the transmit window may include: determining the remaining size of the sending window according to the number of the Protocol Data Units (PDUs) allowed to be added in the sending window; specifically, the remaining size of the transmission window may be represented by the number of PDUs allowed to be added in the transmission window, and assuming that 1000 PDUs can be added in the transmission window, if there are 900 PDUs in the transmission window at a certain time, the remaining size of the transmission window may be represented by 100 PDUs.

In operation 203, if the remaining size of the transmission window is smaller than the preset size, the RLC layer transmits a polling packet to the receiving end through the MAC layer.

It should be noted that the preset size may be set according to actual needs; when the remaining size of the transmission window is represented by the number of allowed PDUs in the transmission window, the preset size may be specifically set to be one number of PDUs, for example, the preset size is set to be 100 PDUs, and in practical applications, vt (ms) -vt(s) <100 may be used to represent that the remaining size of the transmission window is less than 100 PDUs, where vt(s) represents an RLC layer transmission state variable, and vt (ms) represents an RLC layer maximum transmission state variable.

In this embodiment of the present application, when the remaining size of the sending window is smaller than the preset size, it indicates that the number of new PDUs allowed to be added by the sending window is small, which may affect the flow rate of data transmission, and therefore, a polling packet needs to be sent to the receiving end to trigger the receiving end to feed back an RLC status report, so that the PDUs successfully received by the receiving end in the sending window can be determined according to the RLC status report, and then the PDUs successfully received by the receiving end are removed from the sending window to ensure that the remaining size of the sending window is not too small.

In addition, it should be noted that the method for sending polling provided by the embodiment of the present application can be applied to any scene that a polling message needs to be sent, and the method for sending polling provided by the embodiment of the present application can be used alone to trigger a receiving end to feed back an RLC status report; the embodiment of the present application can ensure the traffic of data transmission, so the embodiment of the present application is particularly suitable for scenes with high data transmission traffic requirements, for example, when the terminal device serves as a receiving end, the base station serves as a transmitting end, and the terminal device downloads data from the base station, the method according to the embodiment of the present application can ensure the traffic of data downloading.

Based on the first embodiment and the second embodiment, an embodiment of the present application further provides a third embodiment of a method for sending a polling packet, where the third embodiment includes operations in the first embodiment and operations in the second embodiment, and specifically the following steps are included:

and the RLC layer transmits data to a receiving end through a media access control MAC layer according to a preset transmitting window.

The MAC layer determines that the transmission of data to the receiving end fails.

The MAC layer transmits the first message to the RLC layer.

And the RLC layer sends a polling message to a receiving end through the MAC layer according to the first message.

The RLC layer determines the remaining size of the transmission window.

It should be noted that, since the first and second embodiments have described the above operations in detail, the third embodiment can be understood with reference to the first and second embodiments.

In the embodiment of the application, when the remaining size of the sending window is smaller than the preset size, the RLC layer sends a polling message to the receiving end through the MAC layer, so that the remaining size of the sending window is not too small, the flow rate of data transmission is ensured, and data transmission interruption caused when the remaining size of the sending window is zero can be avoided; after the RLC layer receives the first message from the MAC layer, the RLC layer also sends a polling message to the receiving end through the MAC layer, so that when the MAC layer fails to send data to the receiving end, data retransmission can be carried out in time, and retransmission delay is reduced.

It can be understood that, the foregoing first embodiment can ensure that the polling packet is sent in time when the MAC layer fails to send data to the receiving end, the foregoing second embodiment can ensure that the polling packet is sent in time when the remaining size of the sending window is too small, and when neither of these two cases occurs, the polling packet can be sent in time according to the amount of data already sent in order to achieve the purpose of sending the polling packet in time.

Specifically, referring to fig. 5, a fourth embodiment of a method for sending a polling packet in the embodiment of the present application is shown, and as shown in fig. 5, a fourth embodiment of a method for sending a polling packet is further provided in the embodiment of the present application, and is applied to a sending end, and includes:

in operation 301, the RLC layer transmits data to the receiving end through the MAC layer according to a preset transmission window.

It should be noted that operation 301 in the embodiment of the present application is the same as operation 101 in the first embodiment, and can be understood by referring to the related description of operation 101 in the first embodiment.

In operation 302, if the number of PDUs transmitted to the receiving end is greater than the preset second number, a polling packet is transmitted to the receiving end through the MAC layer.

In operation 303, if the number of bytes of the data sent to the receiving end is greater than the preset number of bytes, a polling packet is sent to the receiving end through the MAC layer.

It can be understood that, both the number of PDUs transmitted to the receiving end and the number of bytes of data transmitted to the receiving end may represent the amount of data already transmitted to the receiving end, and therefore, any one of operation 302 and operation 303 may be performed, or operation 302 and operation 303 may also be performed simultaneously, which is not limited in this embodiment of the present application.

According to the embodiment of the application, the polling message is sent according to the sent data volume, and the polling message can be guaranteed to be sent in time when the remaining size of the sending window is not too small and the RLC layer does not receive the first message from the MAC layer.

Since the operations in the fourth embodiment are independent from the operations in the first, second, and third embodiments, the fourth embodiment may be combined with the first, second, and third embodiments, respectively, to implement the transmission of the polling packet.

Therefore, the present application further provides a fifth embodiment of a method for sending a polling packet, where the fifth embodiment includes the operations in the first embodiment and the operations in the fourth embodiment;

the embodiment of the present application further provides a sixth embodiment of a method for sending a polling packet, where the sixth embodiment includes the operations in the second embodiment and the operations in the fourth embodiment;

the embodiment of the present application further provides a seventh embodiment of a method for sending a polling packet, where the seventh embodiment includes the operations in the third embodiment and the operations in the fourth embodiment.

Since the embodiments of the present application have been described in detail in the first, second, third, and fourth embodiments, the fifth, sixth, and seventh embodiments can be understood by referring to the first, second, third, and fourth embodiments described above.

The above is a specific description of a method of transmitting a poll, and the following is a specific description of an apparatus for transmitting a poll. Referring to fig. 6, a schematic diagram of an embodiment of a radio link control entity in the embodiment of the present application is shown.

As shown in fig. 6, an embodiment of the present application provides an embodiment of a radio link control entity, including:

a sending unit 401, configured to send data to a receiving end through a media access control MAC layer according to a preset sending window;

a receiving unit 402, configured to receive a first message from a MAC layer, where the first message is used to indicate that data transmission to a receiving end fails;

the sending unit 401 is further configured to send a polling packet to the receiving end through the MAC layer according to the first message.

In another embodiment of the radio link control entity provided in the embodiment of the present application, the radio link control entity further includes:

a processing unit 403 for determining a remaining size of the transmission window;

the sending unit 401 is further configured to send a polling packet to the receiving end through the MAC layer when the remaining size of the sending window is smaller than the preset size.

In another embodiment of the radio link control entity provided in this embodiment of the present application, the processing unit 403 is further configured to determine a remaining size of the transmission window according to the number of PDUs allowed to be added in the transmission window.

In another embodiment of the radio link control entity provided in the embodiment of the present application, the sending unit 401 is further configured to:

and/or

Referring to fig. 7, a schematic diagram of another embodiment of a radio link control entity in the embodiment of the present application is shown.

As shown in fig. 7, an embodiment of the present application provides another embodiment of a radio link control entity, including:

a sending unit 501, configured to send data to a receiving end through a media access control MAC layer according to a preset sending window;

a processing unit 502 for determining a remaining size of the transmission window;

the sending unit 501 is further configured to send a polling packet to the receiving end through the MAC layer when the remaining size of the sending window is smaller than the preset size.

In another embodiment of the radio link control entity provided in this embodiment of the application, the processing unit 502 is further configured to determine the remaining size of the transmission window according to the number of PDUs allowed to be added in the transmission window.

In another embodiment of the radio link control entity provided in the embodiment of the present application, the sending unit 501 is further configured to:

and/or

Referring to fig. 8, a schematic diagram of a mac entity in an embodiment of the present application is shown.

As shown in fig. 8, an embodiment of the present application provides an embodiment of a medium access control entity, including:

a transmitting unit 601, configured to transmit data from a radio link control RLC layer to a receiving end;

a processing unit 602, configured to determine that data transmission to a receiving end fails;

the sending unit 601 is further configured to send a first message to the RLC layer, where the first message is used to instruct the RLC layer to send a polling packet to a receiving end;

the sending unit 601 is further configured to send a polling packet from the RLC layer to the receiving end.

In another embodiment of the mac entity provided in the embodiment of the present application, the processing unit 602 is configured to:

As shown in fig. 9, for convenience of description, only the parts related to the embodiment of the present invention are shown, and details of the specific technology are not disclosed, please refer to the method part of the embodiment of the present invention. The attribute information display device may be any terminal device including a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a Point of Sales (POS), a vehicle-mounted computer, and the like, taking the attribute information display device as the mobile phone as an example:

fig. 9 is a block diagram showing a partial structure of a cellular phone related to the attribute information presentation apparatus provided in the embodiment of the present invention. Referring to fig. 9, the handset includes: radio Frequency (RF) circuit 910, memory 920, input unit 930, display unit 940, sensor 950, audio circuit 960, wireless fidelity (WiFi) module 970, processor 980, and power supply 990. Those skilled in the art will appreciate that the handset configuration shown in fig. 9 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following specifically describes each component of the mobile phone with reference to fig. 9:

the RF circuit 910 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, for receiving downlink information of a base station and then processing the received downlink information to the processor 980; in addition, the data for designing uplink is transmitted to the base station. In general, the RF circuit 910 includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 910 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

The memory 920 may be used to store software programs and modules, and the processor 980 may execute various functional applications and data processing of the mobile phone by operating the software programs and modules stored in the memory 920. The memory 920 may mainly include a program storage area and a data storage area, wherein the program storage 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, and the like. Further, the memory 920 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 input unit 930 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. Specifically, the input unit 930 may include a touch panel 931 and other input devices 99. The touch panel 931, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 931 (e.g., a user's operation on or near the touch panel 931 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a preset program. Alternatively, the touch panel 931 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 980, and can receive and execute commands sent by the processor 980. In addition, the touch panel 931 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 930 may include other input devices 99 in addition to the touch panel 931. In particular, other input devices 99 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 940 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The Display unit 940 may include a Display panel 941, and the Display panel 941 may be optionally configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch panel 931 may cover the display panel 941, and when the touch panel 931 detects a touch operation on or near the touch panel 931, the touch panel transmits the touch operation to the processor 980 to determine the type of the touch event, and then the processor 980 provides a corresponding visual output on the display panel 941 according to the type of the touch event. Although in fig. 9, the touch panel 931 and the display panel 941 are two independent components to implement the input and output functions of the mobile phone, in some embodiments, the touch panel 931 and the display panel 941 may be integrated to implement the input and output functions of the mobile phone.

The handset may also include at least one sensor 950, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel 941 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 941 and/or backlight when the mobile phone is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

Audio circuitry 960, speaker 961, microphone 962 may provide an audio interface between a user and a cell phone. The audio circuit 960 may transmit the electrical signal converted from the received audio data to the speaker 961, and convert the electrical signal into a sound signal for output by the speaker 961; on the other hand, the microphone 962 converts the collected sound signal into an electrical signal, converts the electrical signal into audio data after being received by the audio circuit 960, and outputs the audio data to the processor 980 for processing, and then transmits the audio data to, for example, another mobile phone through the RF circuit 910, or outputs the audio data to the memory 920 for further processing.

WiFi belongs to short-distance wireless transmission technology, and the mobile phone can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 970, and provides wireless broadband Internet access for the user. Although fig. 9 shows the WiFi module 970, it is understood that it does not belong to the essential constitution of the handset, and can be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 980 is a control center of the mobile phone, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 920 and calling data stored in the memory 920, thereby integrally monitoring the mobile phone. Alternatively, processor 980 may include one or more processing units; alternatively, the processor 980 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 980.

The handset also includes a power supply 990 (e.g., a battery) for powering the various components, which may optionally be logically connected to the processor 980 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.

Although not shown, the mobile phone may further include a camera module, a bluetooth module, etc., which will not be described herein.

In an embodiment of the present application, the processor 980 may be configured to communicate with the memory 920, and execute a series of instruction operations in the memory 920 on the terminal device.

In this embodiment, the processor 980 may perform the operations performed by the transmitting end in the embodiments shown in fig. 3 to fig. 5, which are not described herein again.

In this embodiment, the specific functional block division in the processor 980 may be similar to the functional block division described in fig. 6 to 8, and is not described herein again.

Referring to fig. 10, an embodiment of a communication device in the embodiments of the present application may include one or more processors 1001, a memory 1002, and a communication interface 1003.

The memory 1002 may be transient storage or persistent storage. Still further, the processor 1001 may be configured to communicate with the memory 1002 to execute a series of instruction operations in the memory 1002 on the communication device.

In this embodiment, the processor 1001 may perform the operations performed by the transmitting end in the embodiments shown in fig. 3 to fig. 5, which are not described herein again.

In this embodiment, the specific functional block division in the processor 1001 may be similar to the functional block division described in fig. 6 to 8, and is not described herein again.

An embodiment of the present application further provides an embodiment of a communication system, where the communication system includes: a sending end and a receiving end;

the sending end is configured to perform operations performed by the sending end in the embodiments shown in fig. 3 to fig. 5, which are not described herein again.

An embodiment of the present application further provides a computer-readable storage medium, which includes instructions, when executed on a computer, cause the computer to execute the method for sending a polling packet according to any one of fig. 3 to 5.

An embodiment of the present application further provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the method for sending a polling packet in any one of fig. 3 to 5.

An embodiment of the present application further provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface is interconnected with the at least one processor through a line, and the at least one processor is configured to run a computer program or an instruction to execute operations performed by the transmitting end in the embodiments shown in fig. 3 to fig. 5, which is not described herein again in detail.

The embodiments of the present application further provide a first implementation manner of a chip or a chip system, where the chip or the chip system described above in the present application further includes at least one memory, and the at least one memory stores instructions therein. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or may be a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

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 manners. 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 integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit 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 may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes 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: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Claims

1. A method for sending polling messages, comprising:

transmitting data to a receiving end through a Media Access Control (MAC) layer according to a preset transmitting window;

receiving a first message from an MAC layer, wherein the first message is used for indicating that data transmission to the receiving end fails;

and sending a polling message to the receiving end through the MAC layer according to the first message.

2. The method of claim 1, wherein after the transmitting data to the receiving end through the MAC layer according to the preset transmission window, the method further comprises:

determining a remaining size of the transmission window;

and if the residual size of the sending window is smaller than the preset size, sending the polling message to the receiving end through the MAC layer.

3. The method of claim 2, wherein the determining the remaining size of the transmission window comprises:

and determining the residual size of the sending window according to the number of the Protocol Data Units (PDUs) allowed to be added in the sending window.

4. The method according to any one of claims 1 to 3, further comprising:

if the number of the PDUs transmitted to the receiving end is larger than a preset second number, transmitting the polling message to the receiving end through the MAC layer;

and/or

And if the byte number of the data sent to the receiving end is larger than the preset byte number, sending the polling message to the receiving end through the MAC layer.

5. A method for sending polling messages, comprising:

determining a remaining size of the transmission window;

6. The method of claim 5, wherein the determining the remaining size of the transmission window comprises:

7. The method of claim 5 or 6, further comprising:

and/or

8. A method for sending polling messages, comprising:

sending data from a Radio Link Control (RLC) layer to a receiving end;

determining that sending data to the receiving end fails;

sending a first message to the RLC layer, wherein the first message is used for indicating the RLC layer to send a polling message to the receiving end;

and sending the polling message from the RLC layer to the receiving end.

9. The method of claim 8, wherein the determining that the sending of data to the receiving end failed comprises:

10. The method of claim 8, wherein the determining that the sending of data to the receiving end failed comprises:

and if the second information corresponding to the data from the receiving end is not received within the preset time, determining that the data transmission to the receiving end fails.

11. A radio link control entity, comprising:

a receiving unit, configured to receive a first message from an MAC layer, where the first message is used to indicate that data transmission to the receiving end fails;

the sending unit is further configured to send a polling packet to the receiving end through the MAC layer according to the first message.

12. The radio link control entity according to claim 11, wherein the radio link control entity further comprises:

a processing unit for determining a remaining size of the transmission window;

the sending unit is further configured to send the polling packet to the receiving end through the MAC layer when the remaining size of the sending window is smaller than a preset size.

13. The rlc entity according to claim 12, wherein the processing unit is further configured to determine the remaining size of the transmission window according to the number of PDUs allowed to be added in the transmission window.

14. The rlc entity according to any one of claims 11 to 13, wherein the sending unit is further configured to:

when the number of the PDUs transmitted to the receiving end is larger than a preset second number, transmitting the polling message to the receiving end through the MAC layer;

and/or

And when the byte number of the data sent to the receiving end is larger than the preset byte number, sending the polling message to the receiving end through the MAC layer.

15. A radio link control entity, comprising:

a processing unit for determining a remaining size of the transmission window;

16. The rlc entity according to claim 15, wherein the processing unit is further configured to determine the remaining size of the transmission window according to the number of PDUs allowed to be added in the transmission window.

17. The rlc entity according to claim 15 or 16, wherein the sending unit is further configured to:

and/or

18. A medium access control entity, comprising:

the sending unit is further configured to send the polling packet from the RLC layer to the receiving end.

19. The medium access control entity according to claim 18, wherein the processing unit is configured to:

20. The medium access control entity according to claim 18, wherein the processing unit is configured to:

21. A terminal device, comprising: at least one processor and a memory, the memory storing computer-executable instructions executable on the processor, the terminal device performing the method of any one of claims 1-10 when the computer-executable instructions are executed by the processor.

22. A communications apparatus, comprising: at least one processor and a memory, the memory storing computer-executable instructions executable on the processor, the communications apparatus performing the method of any one of claims 1-10 when the computer-executable instructions are executed by the processor.

23. A communication system, the communication system comprising: a sending end and a receiving end;

the transmitting end is configured to perform the method according to any one of claims 1 to 10.

24. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-10.

25. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-10.