CN110012546A

CN110012546A - A kind of transmission method, base station and the terminal of protocol Data Unit PDU

Info

Publication number: CN110012546A
Application number: CN201810009460.9A
Authority: CN
Inventors: 韩星宇; 孙军帅; 黄学艳; 王莹莹
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Priority date: 2018-01-05
Filing date: 2018-01-05
Publication date: 2019-07-12

Abstract

The present invention provides transmission method, base station and the terminal of a kind of protocol Data Unit PDU, this method comprises: determining the first downlink PDU for carrying header packet information；Include in the header packet information: the identification information and the sequence number based on service quality stream granularity corresponding with the first downlink PDU of RQI, service quality stream；The first downlink PDU is sent to terminal；The identification information and the sequence number based on service quality stream granularity corresponding with downlink PDU that the embodiment of the present invention passes through transmission service quality stream while sending RQI, whether terminal is successfully received RQI by feedback message instruction terminal, if it is determined that terminal is successfully received RQI, then later without retransmiting RQI until there is next secondary reflection QoS transmission demand；If it is determined that terminal is not successfully received RQI, then base station need to transmit the downlink PDU for carrying header packet information again, it can be ensured that terminal is properly received RQI, while can also save expense.

Description

Transmission method, base station and terminal of Protocol Data Unit (PDU)

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a terminal for transmitting a protocol data unit PDU.

Background

According to the recent progress of the 3GPP RAN2, it is determined that a new access sublayer, i.e., an SDAP (Service Data aggregation Protocol) layer, is added on top of a PDCP (Packet Data Convergence Protocol) layer. The SDAP layer is mainly responsible for mapping QoS Flow (quality of service Flow) to DRB (data radio bearer) and labels different QoS Flow IDs (quality of service Flow identifiers). Currently, 3GPP RAN2 discusses the need to support Reflective QoS (reflected quality of service) functionality at the SDAP layer. The Reflective QoS intends to indicate that the terminal adopts the same mapping mode in the uplink by a mode of carrying an RQI (Reflective QoS Indicator) in a downlink SDAP data packet header, thereby implementing fast remapping from QoS Flow to DRB.

For the Reflective QoS function, at present, 3GPP RAN2 considers that after the remapping is successful, it is no longer necessary to carry a packet header during the transmission of a downlink SDAP pdu (SDAP protocol data unit), thereby saving the header overhead.

In order to determine that a downlink data packet with Reflective QoS information can be successfully received by a terminal and simultaneously save the header overhead, currently, 3GPP RAN2 proposes two packet header carrying manners for discussion:

1. only the first SDAP PDU carries a header indication to indicate that the terminal needs to execute a Reflective QoS function;

2. the header indication is carried in the first multiple SDAP PDUs.

However, for these two implementations, the function of the current SDAP layer cannot ensure that the SDAP PDU carrying the Reflective QoS header can be successfully received by the terminal.

Disclosure of Invention

The invention aims to provide a transmission method of a Protocol Data Unit (PDU), a base station and a terminal, so as to solve the problem that the base station in the prior art can not ensure that the PDU carrying RQI can be successfully received by the terminal.

In order to solve the above problem, an embodiment of the present invention provides a method for transmitting a protocol data unit PDU, which is applied to a base station side, and includes:

determining a first downlink Protocol Data Unit (PDU) carrying packet header information; wherein, the packet header information includes: reflecting a service quality indicator RQI, identification information of a service quality flow in current downlink transmission and a sequence number which corresponds to a first downlink PDU and is based on the granularity of the service quality flow; the RQI is used for indicating that the mapping relation between the service quality flow and the data radio bearer in the downlink transmission is suitable for the uplink transmission;

and sending the first downlink PDU carrying the header information to a terminal.

After the step of sending the first downlink PDU carrying the header information to the terminal, the transmission method further includes:

receiving a first feedback message sent by the terminal within a first preset time length, and determining that the terminal successfully receives the RQI; wherein, the first feedback message carries the identification information of the QoS flow and the QoS flow granularity-based sequence number corresponding to the first downlink PDU;

and a first feedback message sent by the terminal is not received within a first preset time length, and the terminal is determined not to successfully receive the RQI.

receiving a second feedback message sent by the terminal within a second preset time length; if the second feedback message carries the identification information of the QoS flow, the QoS flow granularity-based sequence number corresponding to the first downlink PDU and an Acknowledgement (ACK) character, determining that the terminal successfully receives the RQI; if the second feedback message carries the identification information of the QoS flow, the QoS flow granularity-based sequence number corresponding to the first downlink PDU and the NACK character, determining that the terminal does not successfully receive the RQI;

and the second feedback message sent by the terminal is not received within the second preset time length, and the terminal is determined not to successfully receive the RQI.

Wherein, after the step of determining that the terminal did not successfully receive the RQI, the method further comprises:

sending a second downlink PDU carrying the header information to a terminal;

after the step of determining that the terminal successfully receives the RQI, the method further comprises:

and sending a third downlink PDU which does not carry the header information to the terminal.

When the second downlink PDU carrying the header information is sent to the terminal, if the identification information of the qos flow included in the header information of the second downlink PDU is the same as the identification information of the qos flow included in the header information of the first downlink PDU, the sequence number included in the header information of the second downlink PDU is equal to the sum of the sequence number included in the header information of the first downlink PDU and a preset value.

The step of receiving a first feedback message sent by the terminal within the first preset time length comprises the following steps;

receiving an uplink control PDU sent by the terminal within a first preset time length; wherein the uplink control PDU carries the first feedback message; or,

receiving uplink data PDU sent by the terminal within a first preset time length; and the header of the uplink data PDU carries the first feedback message.

Wherein, the step of receiving a second feedback message sent by the terminal within the second preset time length includes:

receiving an uplink control PDU sent by the terminal within a second preset time length; wherein the uplink control PDU carries the second feedback message; or,

and receiving the uplink data PDU sent by the terminal within a second preset time length, wherein the header of the uplink data PDU carries the second feedback message.

The embodiment of the invention also provides a transmission method of the protocol data unit PDU, which is applied to a terminal side and comprises the following steps:

receiving a first downlink protocol data unit PDU which carries packet header information and is sent by a base station; wherein, the packet header information includes: reflecting a service quality indicator RQI, identification information of a service quality flow in current downlink transmission and a sequence number which corresponds to a first downlink PDU and is based on the granularity of the service quality flow; the RQI is used for indicating that the mapping relation between the service quality flow and the data radio bearer in the downlink transmission is suitable for the uplink transmission;

and analyzing the first downlink PDU to determine whether the RQI is successfully received.

Wherein after the step of parsing the first downlink PDU and determining whether the RQI is successfully received, the method further comprises:

if the terminal successfully receives the RQI, a first feedback message is sent to the base station within a first preset time length; wherein, the first feedback message carries the identification information of the QoS flow and the QoS flow granularity-based sequence number corresponding to the first downlink PDU;

and if the terminal does not successfully receive the RQI, not sending a first feedback message to the base station within a first preset time span.

sending a second feedback message to the base station within a second preset time length; wherein, the second feedback message carries the identification information of the QoS flow, the QoS flow granularity-based sequence number corresponding to the first downlink PDU and an ACK character; or, the second feedback message carries the identification information of the qos flow, the qos flow granularity-based sequence number corresponding to the first downlink PDU, and an NACK character;

or, the second feedback message is not sent to the base station within a second preset time length.

Wherein, the transmission method further comprises:

receiving a second downlink PDU which is sent by the base station and carries the packet header information; or,

and receiving a third downlink PDU which is sent by the base station and does not carry the packet header information.

Wherein, the step of sending the first feedback message to the base station within the first preset time span includes:

sending an uplink control PDU to a base station within a first preset time length; wherein the uplink control PDU carries the first feedback message; or,

sending uplink data PDU to a base station within a first preset time length; and the header of the uplink data PDU carries the first feedback message.

Wherein, the step of sending the second feedback message to the base station within the second preset time span includes:

sending an uplink control PDU to the base station within a second preset time length; wherein the uplink control PDU carries the second feedback message; or,

if the uplink data PDU is sent to the base station within a second preset time length; and the header of the uplink data PDU carries the second feedback message.

The embodiment of the invention also provides a base station, which comprises a processor and a transceiver, wherein the processor is used for executing the following processes:

the transceiver is used for executing the following processes:

Wherein the processor is configured to perform the following process:

Wherein the transceiver is further configured to:

sending a second downlink PDU carrying the header information to a terminal; or,

Wherein the transceiver is further configured to:

The embodiment of the invention also provides a terminal, which comprises a processor and a transceiver, wherein the transceiver is used for executing the following processes:

the processor is used for executing the following processes:

Wherein the transceiver is further configured to:

The embodiment of the invention also provides communication equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor, wherein the processor realizes the transmission method of the protocol data unit PDU when executing the program; or, the processor implements the transmission method of the protocol data unit PDU when executing the program.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the transmission method for the protocol data unit PDU as described above; alternatively, the program realizes the steps in the transmission method of the protocol data unit PDU as described above when executed by the processor.

In the technical scheme of the embodiment of the invention, by sending the identification information of the service quality flow and the serial number corresponding to the downlink PDU and based on the service quality flow granularity at the same time of sending the RQI, the terminal needs to send a feedback message to the base station when successfully receiving the downlink PUD carrying the packet header information, the terminal is indicated whether successfully receiving the RQI through the feedback message, and if the base station determines that the terminal successfully receives the RQI, the RQI does not need to be sent again until the next QoS transmission requirement is met; if the base station determines that the terminal does not successfully receive the RQI, the base station needs to retransmit the downlink PDU carrying the packet header information; the transmission method provided by the embodiment of the invention can ensure that the terminal successfully receives the RQI and can save the cost.

Drawings

Fig. 1 is a flowchart illustrating steps of a method for transmitting a protocol data unit PDU according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an uplink control PDU in a method for transmitting a protocol data unit PDU according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a second step of a method for transmitting a protocol data unit PDU according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an embodiment of the present invention provides a transmission method for a Protocol Data unit PDU, which is applied to a base station side, and in particular, the transmission method is applied to an SDAP (Service Data Aggregation Protocol) layer of the base station side. The transmission method comprises the following steps:

step 11, determining a first downlink protocol data unit PDU carrying header information; wherein, the packet header information includes: reflecting a service quality indicator RQI, identification information of a service quality flow in current downlink transmission and a sequence number which corresponds to a first downlink PDU and is based on the granularity of the service quality flow;

wherein, the RQI is used to indicate that the mapping relationship between the qos stream and the data radio bearer in the downlink transmission is applicable to the uplink transmission.

Specifically, when a reflection quality of service (Reflective QoS) function needs to be used for remapping and downlink data needs to be transmitted, the base station side will perform step 11.

And step 12, sending the first downlink PDU carrying the header information to the terminal.

In the above embodiments of the present invention, the RQI specifically refers to a Reflective QoS Indicator, i.e. a Reflective quality of service Indicator. The RQI is used to indicate that the mapping relationship between the quality of service flow (QoS flow) in downlink transmission and the data radio bearer DRB is applicable to uplink transmission. For example, QoS flow 1 in the current downlink transmission is mapped to DRB1, and at this time, the header information of the first downlink PDU sent by the base station to the terminal includes: RQI, identification information of QoS flow 1, and a QoS flow 1 based sequence number corresponding to the first downlink PDU. In short, the granularity of the sequence numbers (which may also be referred to as SN numbers) is based on each QoS flow.

Preferably, the length of the sequence number is variable, and the base station can determine one or more sequence number length options according to the requirement of the network transmission rate.

In summary, in the above embodiments of the present invention, after the terminal successfully receives the first downlink PDU carrying the packet header information sent by the base station, it needs to send a feedback message to the base station to inform the base station that the RQI has been successfully received, and then the base station does not need to send the downlink PDU carrying the packet header information again; the method can ensure that the terminal successfully receives the RQI and can save the expenditure.

Further, in the foregoing embodiment of the present invention, after step 12, the transmission method further includes:

step 13, receiving a first feedback message sent by the terminal within a first preset time length, and determining that the terminal successfully receives the RQI; wherein, the first feedback message carries the identification information of the QoS flow and the QoS flow granularity-based sequence number corresponding to the first downlink PDU;

and step 14, not receiving the first feedback message sent by the terminal within a first preset time length, and determining that the terminal does not successfully receive the RQI.

Alternatively, after step 12, the transmission method further includes:

step 15, receiving a second feedback message sent by the terminal within a second preset time length; if the second feedback message carries the identification information of the QoS flow, the QoS flow granularity-based sequence number corresponding to the first downlink PDU and an Acknowledgement (ACK) character, determining that the terminal successfully receives the RQI; if the second feedback message carries the identification information of the QoS flow, the QoS flow granularity-based sequence number corresponding to the first downlink PDU and the NACK character, determining that the terminal does not successfully receive the RQI;

and step 16, the second feedback message sent by the terminal is not received within the second preset time length, and it is determined that the terminal does not successfully receive the RQI.

In short, the terminal within the preset time length (the first preset time length and the second preset time length) may directly or indirectly indicate whether the terminal successfully receives the RQI by whether the feedback message is sent and what information is carried in the feedback message.

It should be noted that, if the terminal does not receive (due to some reasons, transmission interruption occurs) the downlink PDU sent by the base station, the terminal cannot give any feedback message, and the base station also defaults that the terminal does not successfully receive the RQI within a first preset time length or a second preset time length after sending the first downlink PDU carrying the header information. Specifically, the first preset time period and the second preset time period may be equal or unequal, and are not specifically limited herein.

Specifically, the first preset time length or the second preset time length may be implemented by using a timer, that is, the timer is started each time the base station sends a new downlink PDU carrying the header information, and the timing time length of the timer is the first preset time length or the second preset time length. The timer is also for the quality of service flows, while at most only one timer is run for each quality of service flow.

It should be noted that after the base station introduces the sequence number, the base station side SDAP layer introduces two state variables. For example, the two state variables are: the SN number (next _ transmitted _ SN) corresponding to the next PDU to be transmitted and the SN number (first _ unconfirmed _ SN) corresponding to the first PDU for which feedback has not been received.

Specifically, the next _ transmitted _ SN is used to indicate an SN number corresponding to the next PDU that needs to carry header information, and an initial value of the state variable may be set to 0; the first _ unconfirmed _ SN is used to indicate an SN number corresponding to the first PDU which carries header information and has not received feedback, in other words, the first _ unconfirmed _ SN is used to indicate an SN number corresponding to the currently transmitted PDU which carries header information, and an initial value thereof may also be set to 0. It should be noted that the granularity of the two state variables is also based on each qos flow.

After receiving the first feedback message or the second feedback message of the terminal, the base station may compare the sequence number obtained by analyzing the first feedback message or the second feedback message with the current value of the first _ unconfirmed _ SN, in order to determine whether the sequence number carried by the first feedback message or the second feedback message is the same as the sequence number carried in the first downlink PDU sent by the base station, and if the sequence number carried by the first feedback message or the second feedback message is the same as the sequence number carried in the first downlink PDU sent by the base station. And when the base station determines that the RQI is not successfully received, the base station needs to send a second PDU carrying the header information to the terminal again (i.e. retransmission is realized), at this time, the SN number included in the header information in the second PDU is the next _ transmitted _ SN, and the base station configures the SN number corresponding to the next PDU to be sent in advance, so as to improve the retransmission efficiency.

It is further noted that, after the step of determining that the terminal did not successfully receive the RQI, the method further includes:

and sending a second downlink PDU carrying the header information to the terminal.

Specifically, after the timer expires, the base station sends a second downlink PDU carrying the header information to the terminal again, where the header information of the second downlink PDU includes a reflection quality of service indication RQI, identification information of a quality of service stream in current downlink transmission, and a sequence number based on a quality of service stream granularity corresponding to the second downlink PDU.

It should be noted that, when the second downlink PDU carrying the header information is sent to the terminal, if the identification information of the qos flow included in the header information of the second downlink PDU is the same as the identification information of the qos flow included in the header information of the first downlink PDU, the sequence number included in the header information of the second downlink PDU is equal to the sum of the sequence number included in the header information of the first downlink PDU and a preset value.

If the identification information of the service quality flow contained in the header information of the second downlink PDU is different from the identification information of the service quality flow contained in the header information of the first downlink PDU, the sequence number contained in the header information of the second downlink PDU is irrelevant to the sequence number contained in the header information of the first downlink PDU; and will not be described in detail herein.

Specifically, if the sequence numbers corresponding to the downlink PDUs carrying the identification information of the same qos flows may be increased in a sequentially increasing manner.

For example, the preset value is equal to 1, and the base station starts a timer when sending a first PDU (i.e., a first downlink PDU) carrying packet header information; wherein, the first PDU carrying header information includes: RQI, QoS flow 1, and sequence number 0. If the terminal does not successfully receive the RQI, the base station retransmits a second PDU (i.e., a second downlink PDU) carrying header information after the timer expires or after it is determined that the terminal does not successfully receive the RQI, where the header information of the second PDU carrying header information includes: RQI, QoS flow 1, and sequence number 1.

It should be noted that, between the base station sending the first downlink PDU and determining that the terminal did not successfully receive the RQI, the base station may also send a PDU carrying header information to the terminal, a sequence number carried in the header information of the PDU carrying header information sent in the period may be the same as a sequence number carried in the header information of the first downlink PDU, or a preset value (which may be plus 1) may be added to the sequence number carried in the header information of the PDU carrying header information each time the PDU carrying header information is sent. It should be further noted that, in this case, the base station determines that the sequence number carried in the header information of the PDU carrying the header information sent to the terminal after the terminal does not successfully receive the RQI is the sum of the sequence number carried in the header information of one downlink PDU closest to the PDU in the time domain and a preset value. For example, when the preset value is equal to 1, the base station starts a timer when sending the first PDU carrying the header information; wherein, the first PDU carrying header information includes: RQI, QoS flow 1 and sequence number 0; before the base station determines that the terminal does not successfully receive the RQI, the base station also sends a second PDU carrying header information, where the header information of the second PDU carrying header information includes: RQI, QoS flow 1 and sequence number 1; after the base station sends the second PDU carrying the header information, it is determined that the terminal did not successfully receive the RQI, at this time, the base station needs to retransmit the PDU carrying the header information, and at this time, the header information of the PDU includes: RQI, QoS flow 1, and sequence number 2. Not to mention here.

It should be further noted that if the number of retransmission times of the downlink PDU carrying the header information exceeds the maximum retransmission times, an error is reported to the upper layer, thereby avoiding the resource waste caused by consistent and repeated transmission and transmission failure; reporting errors in time can also improve the maintenance efficiency.

sending a third downlink PDU which does not carry the packet header information to a terminal; until there is a transmission requirement for the next reflection quality of service.

If the terminal successfully receives the RQI, the terminal can realize the quick remapping of the service quality flow to the DRB during the uplink transmission, and the base station does not need to carry the reflection service quality indication RQI, the identification information of the service quality flow in the current downlink transmission and the sequence number corresponding to the first downlink PDU and based on the service quality flow granularity, thereby saving the cost.

Further, the step of receiving the first feedback message sent by the terminal within the first preset time length in the above embodiment of the present invention includes;

The step of receiving a second feedback message sent by the terminal within the second preset time length includes:

Preferably, the design of the uplink PDU has two options:

option one: and when the uplink PDU is the uplink control PDU, the uplink control PDU carries the first feedback message or the second feedback message. The uplink control PDU is used to specially indicate a sequence number carried in a downlink PDU received by the terminal, and at this time, the uplink data PDU does not need to carry the sequence number. In order to make a compromise between reliability and overhead saving, one or more uplink control PDUs may be transmitted during a period of time, which is not specifically limited herein.

As shown in fig. 2, one possible structure of the uplink control PDU with a length of 8 bits in option one is shown, specifically, the uplink control PDU includes:

quality of service Flow identification QoS Flow ID: the QoS Flow ID is used for distinguishing different QoS flows mapped to the same DRB; and the number of the first and second groups,

the ACK _ SN domain is used for indicating the sequence number carried by the downlink PDU corresponding to the feedback;

optionally, the uplink control PDU further includes:

the D/C field is used for indicating whether data PDU or control PDU is transmitted; and/or the presence of a gas in the gas,

the CPT field is used to indicate the type of control PDU.

And (5) option two: and when the uplink PDU is the uplink data PDU, carrying the first feedback message or the second feedback message in a data packet header of the uplink data PDU. The uplink data PDU carries a sequence number to implicitly indicate that the RQI carried in the downlink PDU is successfully received, and the option requires that an SN field is added into a data packet header of the uplink data PDU, and the SN field is used for indicating the sequence number carried by the corresponding downlink PDU.

In summary, in the above embodiments of the present invention, by sending the RQI and simultaneously sending the identification information of the QoS stream and the sequence number corresponding to the downlink PDU and based on the QoS stream granularity, when the terminal successfully receives the downlink PUD carrying the header information, a feedback message needs to be sent to the base station, and the feedback message indicates whether the terminal successfully receives the RQI, and if the base station determines that the terminal successfully receives the RQI, the base station does not need to send the RQI again until there is a next QoS transmission request; if the base station determines that the terminal does not successfully receive the RQI, the base station needs to retransmit the downlink PDU carrying the packet header information; the transmission method provided by the embodiment of the invention can ensure that the terminal successfully receives the RQI and can save the cost.

As shown in fig. 3, an embodiment of the present invention further provides a method for transmitting a protocol data unit PDU, which is applied to a terminal side, and includes:

step 31, receiving a first downlink protocol data unit PDU carrying packet header information sent by a base station; wherein, the packet header information includes: reflecting a service quality indicator RQI, identification information of a service quality flow in current downlink transmission and a sequence number which corresponds to a first downlink PDU and is based on the granularity of the service quality flow;

And 32, analyzing the first downlink PDU to determine whether the RQI is successfully received.

Further, after step 32 in the above embodiment of the present invention, the method further includes:

step 33, if the terminal successfully receives the RQI, sending a first feedback message to the base station within a first preset time length; wherein, the first feedback message carries the identification information of the QoS flow and the QoS flow granularity-based sequence number corresponding to the first downlink PDU;

and step 34, if the terminal does not successfully receive the RQI, not sending the first feedback message to the base station within a first preset time length.

Alternatively, after step 32, the transmission method further includes:

step 35, sending a second feedback message to the base station within a second preset time length; wherein, the second feedback message carries the identification information of the QoS flow, the QoS flow granularity-based sequence number corresponding to the first downlink PDU and an ACK character; or, the second feedback message carries the identification information of the qos flow, the qos flow granularity-based sequence number corresponding to the first downlink PDU, and an NACK character;

or, step 36, the second feedback message is not sent to the base station within a second preset time length.

Further, in the foregoing embodiment of the present invention, the transmission method further includes:

receiving a third downlink PDU which is sent by the base station and does not carry the packet header information; until there is a transmission requirement for the next reflection quality of service.

Preferably, in the above embodiment of the present invention, the step of sending the first feedback message to the base station within the first preset time duration includes:

The step of sending the second feedback message to the base station within the second preset time length includes:

Preferably, the design of the uplink PDU has two options:

As shown in fig. 4, an embodiment of the present invention further provides a base station, which includes a processor 400 and a transceiver 410, where the processor 400 is configured to perform the following processes:

the transceiver 410 is configured to perform the following processes:

Preferably, the processor 400 according to the above embodiment of the present invention is configured to perform the following processes:

Preferably, in the above embodiments of the present invention, the transceiver 410 is further configured to:

Preferably, in the above embodiment of the present invention, when the second downlink PDU carrying the header information is sent to the terminal, if the identification information of the qos flow included in the header information of the second downlink PDU is the same as the identification information of the qos flow included in the header information of the first downlink PDU, the sequence number included in the header information of the second downlink PDU is equal to the sum of the sequence number included in the header information of the first downlink PDU and a preset value.

Preferably, in the above embodiment of the present invention, the processor 400 is further configured to:

It should be noted that the base station provided in the above embodiments of the present invention is a base station capable of executing the above transmission method of the protocol data unit PDU, and all embodiments of the above transmission method of the protocol data unit PDU are applicable to the base station and all can achieve the same or similar beneficial effects.

As shown in fig. 5, an embodiment of the present invention further provides a terminal, which includes a processor 500 and a transceiver 510, and the terminal further includes a user interface 520, where the transceiver 510 is configured to perform the following processes:

the processor 500 is configured to perform the following processes:

Preferably, in the above embodiments of the present invention, the transceiver 510 is further configured to:

It should be noted that the terminal provided in the above embodiments of the present invention is a terminal capable of executing the transmission method of the protocol data unit PDU, and all embodiments of the transmission method of the protocol data unit PDU are applicable to a terminal, and can achieve the same or similar beneficial effects.

In order to better achieve the above object, an embodiment of the present invention further provides a communication device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements each process in the above-described transmission method embodiment of a protocol data unit PDU at a base station side when executing the program, and can achieve the same technical effect, and is not described herein again to avoid repetition; or, when the processor executes the program, the processor implements each process in the above-described embodiment of the method for transmitting a protocol data unit PDU at the terminal side, and can achieve the same technical effect, and details are not described here to avoid repetition.

In order to better achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process in the above-mentioned transmission method embodiment of a protocol data unit PDU at a base station side, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk; or, when being executed by the processor, the program implements each process in the above-described embodiment of the method for transmitting a protocol data unit PDU at the terminal side, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.

These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A transmission method of Protocol Data Unit (PDU) is applied to a base station side, and is characterized by comprising the following steps:

2. The transmission method according to claim 1, wherein after the step of sending the first downlink PDU carrying the header information to the terminal, the transmission method further comprises:

3. The transmission method according to claim 1, wherein after the step of sending the first downlink PDU carrying the header information to the terminal, the transmission method further comprises:

4. The transmission method according to claim 2 or 3, wherein after the step of determining that the terminal did not successfully receive the RQI, the method further comprises:

sending a second downlink PDU carrying the header information to a terminal;

5. The transmission method according to claim 4, wherein when the second downlink PDU carrying the header information is sent to the terminal, if the identification information of the qos flow included in the header information of the second downlink PDU is the same as the identification information of the qos flow included in the header information of the first downlink PDU, the sequence number included in the header information of the second downlink PDU is equal to a sum of the sequence number included in the header information of the first downlink PDU and a preset value.

6. The transmission method according to claim 2, wherein the step of receiving the first feedback message sent by the terminal within the first preset time length includes;

7. The transmission method according to claim 3, wherein the step of receiving the second feedback message sent by the terminal within the second preset time duration includes:

8. A transmission method of Protocol Data Unit (PDU) is applied to a terminal side, and is characterized by comprising the following steps:

9. The transmission method according to claim 8, wherein after the step of parsing the first downlink PDU to determine whether the RQI is successfully received, the method further comprises:

10. The transmission method according to claim 8, wherein after parsing the first downlink PDU to determine whether the RQI is successfully received, the method further comprises:

11. The transmission method according to claim 9 or 10, characterized in that the transmission method further comprises:

12. The transmission method according to claim 9, wherein the step of sending the first feedback message to the base station within the first preset time period comprises:

13. The transmission method according to claim 10, wherein the step of sending the second feedback message to the base station within the second preset time period comprises:

14. A base station comprising a processor and a transceiver, wherein the processor is configured to perform the following:

determining a first downlink Protocol Data Unit (PDU) carrying packet header information; wherein, the packet header information includes: reflecting a service quality indicator RQI, identification information of a service quality flow in current downlink transmission and a sequence number which corresponds to a first downlink PDU and is based on the granularity of the service quality flow; the RQI is used for indicating that the mapping relation between the service quality flow and the data radio bearer in the downlink transmission is suitable for the uplink transmission

The transceiver is used for executing the following processes:

15. The base station of claim 14, wherein the processor is configured to perform the following process:

16. The base station of claim 14, wherein the processor is configured to perform the following process:

17. The base station of claim 15 or 16, wherein the transceiver is further configured to:

18. The base station of claim 17, wherein when sending the second downlink PDU carrying the header information to the terminal, if the identification information of the qos flow included in the header information of the second downlink PDU is the same as the identification information of the qos flow included in the header information of the first downlink PDU, a sequence number included in the header information of the second downlink PDU is equal to a sum of a sequence number included in the header information of the first downlink PDU and a preset value.

19. The base station of claim 15, wherein the transceiver is further configured to:

20. The base station of claim 16, wherein the transceiver is further configured to:

21. A terminal comprising a processor and a transceiver, wherein the transceiver is configured to perform the following:

the processor is used for executing the following processes:

22. The terminal of claim 21, wherein the transceiver is further configured to:

23. The terminal of claim 21, wherein the transceiver is further configured to:

24. The terminal according to claim 22 or 23, wherein the transceiver is further configured to:

25. The terminal of claim 22, wherein the transceiver is further configured to:

26. The terminal of claim 23, wherein the transceiver is further configured to:

27. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; wherein the processor implements the method for transmitting protocol data units, PDUs, according to any of claims 1-7 when executing the program; or,

the processor, when executing the program, implements a method for transmission of protocol data units, PDUs, according to any of claims 8-13.

28. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for transmission of protocol data units, PDUs, according to any of claims 1-7; or,

the program when executed by a processor implements the steps in a method for transmission of protocol data units, PDUs, according to any of claims 8-13.