CN111163017B - Data transmission method, device, base station equipment and computer readable storage medium - Google Patents

Data transmission method, device, base station equipment and computer readable storage medium Download PDF

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Publication number
CN111163017B
CN111163017B CN201911401811.1A CN201911401811A CN111163017B CN 111163017 B CN111163017 B CN 111163017B CN 201911401811 A CN201911401811 A CN 201911401811A CN 111163017 B CN111163017 B CN 111163017B
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mapping rule
sdap pdu
terminal
sdap
identification field
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CN111163017A (en
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吴伟锋
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Comba Network Systems Co Ltd
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Comba Network Systems Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application relates to a data transmission method, a data transmission device, base station equipment and a computer readable storage medium. The data transmission method comprises the following steps: if the updating of the mapping rule is detected, acquiring the updated mapping rule; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow; sending a Service Data Adaptation Protocol (SDAP) Protocol Data Unit (PDU) to a terminal for multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, where the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule. By adopting the method, the possibility of normal transmission of the updated mapping rule can be improved, and the accuracy of data transmission is improved.

Description

Data transmission method, device, base station equipment and computer readable storage medium
Technical Field
The present application relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, base station device, and computer readable storage medium.
Background
In the 5G new air interface user plane protocol stack, a new protocol layer is introduced above the existing PDCP (Packet Data Convergence Protocol ) layer: SDAP (Service Data Adaptation Protocol), service data adaptation protocol) layer. The SDAP layer can implement a mapping between QoS (Quality of Service ) flows and DRB (Data Radio Bearer, data radio bearers). QoS flows are the finest QoS differentiation granularity in PDU sessions.
In downlink data transmission, a base station device receives a data packet from a network side and submits the data packet to an SDAP layer for processing; the SDAP layer is processed and then transferred to the PDCP layer for processing, and then transferred to the lower layer by the PDCP layer. After the data packet reaches the PDCP layer of the terminal through the lower layer, the data packet is processed by the PDCP layer of the terminal and then transferred to the SDAP layer of the terminal.
If the mapping rule between the QoS flow and the DRB, the mapping rule between the SDF (Service Data Flow ) and the QoS flow are updated, the base station device starts to send a data packet to the terminal using the updated mapping rule, and sets the identification field in the data packet to a first value when the data packet is sent using the updated mapping rule for the first time. If the SDAP layer of the terminal recognizes that the identification field in the data packet is the first value, the data packet is analyzed, the mapping rule of the QoS flow and the DRB in the data packet and/or the mapping rule of the SDF (Service Data Flow ) and the QoS flow are obtained, and corresponding operation is executed.
However, when the air interface is greatly interfered or the traffic load is excessively heavy, the PDCP layer of the base station apparatus discards the data packet with the retention timeout. Therefore, after the mapping rule is updated, when the base station device uses the updated mapping rule to send the data packet to the terminal, the data packet is discarded by the base station without being sent, so that the terminal cannot receive the data packet, and further cannot acquire the mapping rule in the data packet, and the data transmission is wrong.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a data transmission method, apparatus, base station device, and computer-readable storage medium capable of improving data transmission accuracy.
In a first aspect, an embodiment of the present application provides a data transmission method, where the data transmission method includes:
if the updating of the mapping rule is detected, acquiring the updated mapping rule; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow;
sending a Service Data Adaptation Protocol (SDAP) Protocol Data Unit (PDU) to a terminal for multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, where the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule.
In one embodiment, the mapping rule includes a mapping rule of QoS flows and DRBs; and sending SDAP PDU to the terminal for multiple times according to the updated mapping rule, comprising:
according to the updated mapping rule, a first SDAP PDU is sent to a terminal; the first SDAP PDU comprises an RDI identification field, and the RDI identification field is set to a first value, wherein the first value is used for indicating the terminal to parse the first SDAP PDU to acquire the updated mapping rule;
Detecting whether feedback information sent by the terminal is received or not according to a preset time period; the feedback message is used for determining that the terminal has stopped using the original mapping rule;
if the feedback message is not received, a second SDAP PDU is sent to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the second SDAP PDU is a next SDAP PDU adjacent to the first SDAP PDU.
In one embodiment, the method further comprises:
if the feedback message is received, a second SDAP PDU is sent to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field that is set to a second value, the second SDAP PDU being a next SDAP PDU adjacent to the first SDAP PDU.
In one embodiment, after the sending the second SDAP PDU to the terminal according to the updated mapping rule, the method further includes:
and if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be transmitted, transmitting the second SDAP PDU to the terminal for multiple times according to the updated mapping rule until the feedback message is received.
In one embodiment, after the sending the second SDAP PDU to the terminal according to the updated mapping rule, the method further includes:
if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be sent, generating an Internet packet explorer Ping packet; the Ping packet includes an RDI identification field, the RDI identification field being set to a first value;
and sending the added Ping packet to the terminal for multiple times according to the updated mapping rule until the feedback message is received.
In one embodiment, the mapping rules include mapping rules of SDFs and QoS flows; and sending SDAP PDU to the terminal for multiple times according to the updated mapping rule, comprising:
according to the updated mapping rule, a third SDAP PDU is sent to the terminal; the third SDAP PDU includes an RQI identification field, the RQI identification field is set to a third value, and the third value is used for indicating the terminal to parse the third SDAP PDU to obtain the updated mapping rule;
subtracting one from the preset transmission times when the preset timer times out each time, and detecting whether the subtracted transmission times are zero;
If the accumulated and subtracted number of times of transmission is not zero, a fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field, which is set to a third value.
In one embodiment, the method further comprises:
if the accumulated and subtracted number of times of transmission is zero, a fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field, which is set to a fourth value.
In one embodiment, the mapping rule further includes a mapping rule of QoS flows with DRBs, and the third SDAP PDU further includes an RDI identification field set to a first value.
In one embodiment, the method further comprises:
if the feedback message sent by the terminal is received, a fourth SDAP PDU is sent to the terminal according to the updated mapping rule; the fourth SDAP PDU includes an RDI identification field set to a second value.
In one embodiment, the method further comprises:
if the timer is not overtime and the mapping rule is detected to be updated, the SDAP PDU to be sent currently is sent to the terminal according to the latest mapping rule; the SDAP PDU currently to be transmitted includes an RDI identification field set to a first value and/or an RQI identification field set to a third value.
In a second aspect, an embodiment of the present application provides a data transmission apparatus, including:
the acquisition module is used for acquiring the updated mapping rule if the mapping rule update is detected; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow;
the first sending module is used for sending the service data adaptation protocol SDAP protocol data unit PDU to the terminal for a plurality of times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, where the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule.
In a third aspect, an embodiment of the present application provides a base station device, comprising a memory storing a computer program and a processor implementing the steps of the method according to the first aspect above when the processor executes the computer program.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method as described in the first aspect above.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
if the mapping rule is detected to be updated, acquiring an updated mapping rule; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow; sending a Service Data Adaptation Protocol (SDAP) Protocol Data Unit (PDU) to a terminal for multiple times according to the updated mapping rule; each SDAP PDU comprises a rule analysis identifier, wherein the rule analysis identifier is used for instructing the terminal to analyze the SDAP PDU to acquire the updated mapping rule; thus, according to the updated mapping rule, SDAP PDU including rule analysis identification is sent to the terminal for multiple times; the problem that in the prior art, when the base station equipment adopts the updated mapping rule to send data after updating the mapping rule, the identification field is set to the first value only in the first data packet to prompt the terminal to analyze the first data packet to acquire the updated mapping rule, so that the first data packet possibly is discarded by the PDCP layer of the base station equipment as a data packet with retention time-out, the terminal cannot receive the first data packet, the updated mapping rule cannot be acquired, and data transmission errors occur is avoided. The application improves the possibility of normal transmission of the updated mapping rule and improves the accuracy of data transmission.
Drawings
FIG. 1 is an application environment diagram of a data transmission method according to an embodiment;
fig. 2 is a flow chart of a data transmission method according to an embodiment;
fig. 3 is a flow chart of a data transmission method according to an embodiment;
fig. 4 is a flow chart of a data transmission method according to an embodiment;
fig. 5 is a flow chart of a data transmission method according to an embodiment;
fig. 6 is a flow chart of a data transmission method according to an embodiment;
fig. 7 is a flow chart of a data transmission method according to an embodiment;
fig. 8 is a flow chart of a data transmission method according to an embodiment;
fig. 9 is a flow chart of a data transmission method according to an embodiment;
fig. 10 is a block diagram of a data transmission device according to an embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The data transmission method, the device, the base station equipment and the computer readable storage medium provided by the embodiment of the application aim to solve the technical problem that in the traditional technology, after the mapping rule is updated, when the base station equipment adopts the updated mapping rule to send data, the terminal can not acquire the updated mapping rule, so that the data transmission accuracy is low. The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail by examples and with reference to the accompanying drawings. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
The data transmission method provided by the embodiment of the application can be applied to the base station equipment shown in fig. 1. As shown in fig. 1, the SDAP layer is located above the PDCP layer, and in the downlink communication link, when the SDAP layer receives an SDAP SDU from an upper QoS flow, the SDAP SDU is processed to obtain an SDAP PDU; the SDAP layer sends the SDAP PDU to the PDCP layer through the DRB, and the SDAP PDU is sent to the terminal after being processed by the lower layer in sequence.
The execution body of the data transmission method provided by the embodiment of the application can be a data transmission device, and the data transmission device can be realized to be part or all of base station equipment in a mode of software, hardware or combination of software and hardware. In the following method embodiments, the execution subject is a base station device.
Referring to fig. 2, a flowchart of a data transmission method according to an embodiment of the present application is shown, and as shown in fig. 2, the data transmission method of the present embodiment may include the following steps:
step S100, if the mapping rule update is detected, the updated mapping rule is obtained.
Wherein the mapping rule comprises a mapping rule of a quality of service QoS flow and a data radio bearer DRB and/or a mapping rule of a service data flow SDF and a QoS flow.
In this embodiment, the base station device detects the updating of the mapping rule of the QoS flow and the DRB, which may be detected by the received mapping rule modification message, where the mapping rule modification message may be manually input to the base station device, and the base station device obtains the updated mapping rule from the mapping rule modification message. The base station device detects the updating of the mapping rule of the QoS flow and the DRB, or can also detect the updating according to the data packet sent by the core network, and the base station device analyzes the updated mapping rule of the QoS flow and the DRB from the data packet sent by the core network.
Further, the base station device detects that the mapping rule of the SDF and the QoS flow is updated, which may be detected according to a data packet sent by the core network, and the base station device parses the updated mapping rule of the SDF and the QoS flow from the data packet sent by the core network.
Step S200, the service data adaptation protocol SDAP protocol data unit PDU is sent to the terminal for a plurality of times according to the updated mapping rule.
Each SDAP PDU includes a rule parsing identifier for instructing the terminal to parse the SDAP PDU to obtain an updated mapping rule.
In this embodiment, when the reflection mapping rule is configured, after the SDAP layer receives the SDAP SDU, SDAP header information is added to the SDAP SDU, and an SDAP PDU is formed after the adding. The SDAP header information includes QFI (QoS Flow ID, qoS Flow identifier) and rule resolution identifier. In 5G systems, a QFI is used to identify a QoS flow, i.e., which QoS flow the SDAP SDU corresponds to.
And the base station equipment sends SDAP PDUs added with the SDAP header information to the terminal for a plurality of times according to the updated mapping rules, wherein each SDAP PDU comprises a rule analysis identifier. Specifically, the SDAP layer of the base station device sequentially transmits each packet of SDAP PDU added with SDAP header information to the PDCP layer of the base station device, and transmits the SDAP PDU to the lower layer through the PDCP layer, and transmits the SDAP PDU to the terminal from the lower layer. It can be understood that, even if the PDCP layer discards the first SDAP PDU sent by the SDAP layer according to the updated mapping rule, which results in the terminal not receiving the first SDAP PDU, the terminal receives the second SDAP PDU, the third SDAP PDU, or any one of the SDAP PDUs after the first SDAP PDU sent by the SDAP layer according to the updated mapping rule, each SDAP PDU includes a rule parsing identifier, and the terminal parses the received SDAP PDU according to the indication of the rule parsing identifier, to obtain the updated mapping rule.
In the embodiment, if the mapping rule is detected to be updated, the updated mapping rule is obtained; the mapping rules comprise the mapping rules of the QoS flow and the data radio bearer DRB, and/or the mapping rules of the SDF and the QoS flow; according to the updated mapping rule, sending a Service Data Adaptation Protocol (SDAP) protocol data unit PDU to the terminal for multiple times; each SDAP PDU comprises a rule analysis identifier, wherein the rule analysis identifier is used for indicating a terminal to analyze the SDAP PDU to acquire an updated mapping rule; thus, according to the updated mapping rule, SDAP PDU including rule analysis identification is sent to the terminal for multiple times; the problem that in the prior art, when the base station equipment adopts the updated mapping rule to send data after updating the mapping rule, the identification field is set to the first value only in the first data packet to prompt the terminal to analyze the first data packet to acquire the updated mapping rule, so that the first data packet possibly is discarded by the PDCP layer of the base station equipment as a data packet with retention timeout, the terminal cannot receive the first data packet, the updated mapping rule cannot be acquired, and data transmission errors occur is avoided. The embodiment improves the possibility of normal transmission of the updated mapping rule and improves the accuracy of data transmission.
Fig. 3 is a flowchart of a data transmission method according to another embodiment, and based on the embodiment shown in fig. 2, step S200 of this embodiment includes step S210, step S220, and step S230, specifically:
step S210, according to the updated mapping rule, the first SDAP PDU is sent to the terminal.
The first SDAP PDU includes an RDI identification field that is set to a first value that instructs the terminal to parse the first SDAP PDU to obtain an updated mapping rule.
In this embodiment, the mapping rule specifically includes a mapping rule of QoS flows and DRBs.
After the mapping rule of the QoS flow and the DRB is updated, the SDAP layer of the base station equipment receives a first SDAP SDU, adds SDAP header information to the first SDAP SDU, and forms a first SDAP PDU after adding; and the SDAP layer sends the first SDAP PDU to the PDCP layer of the base station equipment according to the updated mapping rule of the QoS flow and the DRB, and the SDAP PDU is processed by the PDCP layer and the lower layer and then sent to the terminal. In this embodiment, the SDAP header information specifically includes a QFI and an RDI identification field, where the RDI identification field is set to a first value by the base station device, and the first value may be "1"; in other embodiments, the first value may be in other representations as well.
If the terminal receives the first SDAP PDU sent by the base station equipment and recognizes that the RDI identification field in the first SDAP PDU is a first value, the terminal analyzes the first SDAP PDU, acquires the mapping rule of the updated QoS flow and the DRB, and reflects the mapping rule of the updated QoS flow and the DRB to an uplink communication link.
Step S220, according to the preset time period, whether a feedback message sent by the terminal is received is detected.
The feedback message is used to determine that the terminal has stopped using the original mapping rule.
In this embodiment, the feedback message is an End-Marker PDU, and if the terminal receives the first SDAP PDU, after analyzing the first SDAP PDU to obtain the mapping rule of the updated QoS flow and the DRB, the terminal will send the End-Marker PDU to the base station device on the original DRB. The base station equipment analyzes the End-Marker PDU to determine that the terminal subsequently stops the transmission of the QoS stream pointed by the QFI field of the End-Marker PDU on the original DRB.
In this embodiment, the base station device sets an RDI timer, and after the RDI timer reaches a preset time period, triggers the base station device to detect whether a feedback message sent by the terminal is received.
Step S230, if the feedback message is not received, the second SDAP PDU is sent to the terminal according to the updated mapping rule.
The second SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the second SDAP PDU is a next SDAP PDU adjacent to the first SDAP PDU.
If the base station equipment does not receive the feedback message, the terminal does not receive the first SDAP PDU; the base station device sets the RDI identification field of the second SDAP PDU to a first value for the SDAP PDU to be transmitted of the next packet, that is, the second SDAP PDU, and then transmits the second SDAP PDU to the terminal.
Specifically, if the base station device does not receive the feedback message, when the SDAP layer of the base station device receives the second SDAP SDU, SDAP header information is added to the second SDAP SDU, specifically QFI and RDI identification field set as the first value are added, and a second SDAP PDU is formed after the adding; and the SDAP layer sends the second SDAP PDU to the PDCP layer of the base station equipment according to the updated mapping rule of the QoS flow and the DRB, and the SDAP PDU is processed by the PDCP layer and the lower layer and then sent to the terminal.
If the terminal receives a second SDAP PDU sent by the base station equipment and recognizes that an RDI identification field in the second SDAP PDU is a first value, the terminal analyzes the second SDAP PDU, acquires the mapping rule of the updated QoS flow and the DRB, and reflects the mapping rule of the updated QoS flow and the DRB to an uplink communication link.
It will be appreciated that the terminal may still not receive the second SDAP PDU due to air interface interference or the PDCP layer dropping. If the base station equipment does not detect the feedback message sent by the terminal according to the preset time period, after the second SDAP PDU, the SDAP PDU needing to be sent by the next packet is also added with QFI and RDI identification field set as a first value and then sent; and if the base station equipment still does not detect the feedback message, the SDAP PDU which needs to be sent subsequently is processed by the same method until the feedback message sent by the terminal is received.
In the embodiment, if the mapping rule is detected to be updated, the updated mapping rule is obtained; according to the updated mapping rule, a first SDAP PDU is sent to the terminal; detecting whether feedback information sent by a terminal is received or not according to a preset time period; if the feedback message is not received, a second SDAP PDU is sent to the terminal according to the updated mapping rule; therefore, when no feedback message is received, the QFI and the RDI identification field set as the first value are continuously added to the SDAP PDU to be sent so as to instruct the terminal to analyze the received SDAP PDU to acquire the updated mapping rule, thereby improving the probability of acquiring the updated mapping rule by the terminal and improving the robustness that the terminal can correctly adopt after the mapping rule is modified; the embodiment ensures normal transmission of the mapping rule under the condition of serious air interface interference, and improves the accuracy of data transmission.
Fig. 4 is a flowchart of a data transmission method according to another embodiment, after step S220, the embodiment further includes step S240, specifically:
step S240, if the feedback message is received, the second SDAP PDU is sent to the terminal according to the updated mapping rule.
The second SDAP PDU of this embodiment includes an RDI identification field that is set to a second value, the second SDAP PDU being the next SDAP PDU adjacent to the first SDAP PDU.
In this embodiment, if the base station device receives the feedback message sent by the terminal, it indicates that the terminal has received the first SDAP PDU, has acquired the mapping rule of the updated QoS flow and the DRB, and in the subsequent transmission of the SDAP PDU, the base station device sets the RDI identification field of the SDAP PDU to a second value, which may be "0", and in other embodiments, may be in other representation forms different from the first value.
If the terminal receives the second SDAP PDU and recognizes that the RDI identification field included in the second SDAP PDU is set to the second value, the terminal will not parse the second SDAP PDU to obtain the updated mapping rule.
Fig. 5 is a flowchart of a data transmission method according to another embodiment, and step S300 is further included after step S230 in the embodiment shown in fig. 3, specifically:
step S300, if no feedback message is detected according to the time period and the second SDAP PDU is the last data packet to be sent, the second SDAP PDU is sent to the terminal for multiple times according to the updated mapping rule until the feedback message is received.
In this embodiment, if there is no data to be transmitted in the current downlink data transmission, that is, the second SDAP PDU is the last data packet to be transmitted and has been sent by the SDAP layer, but the base station device has not yet received the feedback message sent by the terminal, it indicates that the terminal has not yet received any SDAP PDU with the RDI identification field set to the first value, that is, the terminal has not yet obtained the mapping rule of the updated QoS flow and DRB.
In order to ensure that the terminal can acquire the mapping rule of the updated QoS flow and the DRB, the base station equipment backs up the last transmitted SDAP PDU, namely, backs up a second SDAP PDU, wherein the second SDAP PDU comprises QFI and RDI identification field set to a first value; and the base station equipment detects whether feedback information sent by the terminal is received or not at intervals of a preset time period, and if the feedback information is not received, the base station equipment continues to send the backed-up second SDAP PDU until the feedback information is received. Therefore, the probability of acquiring the mapping rule of the updated QoS flow and the DRB by the terminal is improved, the normal transmission of the mapping rule is ensured under the condition that the downlink data transmission does not have the data to be transmitted, and the accuracy of the subsequent data transmission is improved.
Fig. 6 is a flowchart of a data transmission method according to another embodiment, and step S230 of the present embodiment further includes step S410 and step S420 after the above embodiment shown in fig. 3, specifically:
In step S410, if no feedback message is detected according to the time period, and the second SDAP PDU is the last data packet to be transmitted, an internet packet explorer Ping packet is generated.
The Ping packet includes an RDI identification field that is set to a first value.
In this embodiment, if there is no data to be transmitted in the current downlink data transmission, that is, the second SDAP PDU is the last data packet to be transmitted and has been sent by the SDAP layer, but the base station device has not yet received the feedback message sent by the terminal, it indicates that the terminal has not yet received any SDAP PDU with the RDI identification field set to the first value, that is, the terminal has not yet obtained the mapping rule of the updated QoS flow and DRB.
To ensure that the terminal can acquire the mapping rule of the updated QoS flow and DRB, the base station apparatus generates an internet packet explorer Ping packet, and adds QFI and RDI identification field set to a first value to the Ping packet.
Step S420, the added Ping packet is sent to the terminal for a plurality of times according to the updated mapping rule until a feedback message is received.
The base station equipment detects whether feedback information sent by the terminal is received or not at intervals of a preset time period, and if the feedback information is not received, the Ping packet is sent until the feedback information is received. Therefore, the probability of acquiring the mapping rule of the updated QoS flow and the DRB by the terminal is improved, the normal transmission of the mapping rule is ensured under the condition that the downlink data transmission does not have the data to be transmitted, and the accuracy of the subsequent data transmission is improved.
Fig. 7 is a flowchart of a data transmission method according to another embodiment, and, based on the embodiment shown in fig. 2, as shown in fig. 7, step S200 of this embodiment includes step S250, step S260, and step S270, specifically:
step S250, according to the updated mapping rule, a third SDAP PDU is sent to the terminal.
The third SDAP PDU includes a RQI identification field that is set to a third value that instructs the terminal to parse the third SDAP PDU to obtain an updated mapping rule.
In this embodiment, the mapping rule specifically includes a mapping rule of an SDF and a QoS flow.
After the base station equipment acquires the mapping rule update of the SDF and the QoS flow from the core network side, the SDAP layer of the base station equipment receives a third SDAP SDU, adds SDAP header information to the third SDAP SDU, and forms a third SDAP PDU after adding; and the SDAP layer sends the third SDAP PDU to the PDCP layer of the base station equipment according to the updated mapping rule of the SDF and the QoS flow, and the SDAP PDU is processed by the PDCP layer and the lower layer and then sent to the terminal. In this embodiment, the SDAP header information specifically includes a QFI and an RQI identification field, where the RQI identification field is set to a third value by the base station device, and the third value may be consistent with a representation form of the first value, for example, "1", or may be other representation forms different from the first value and the second value.
If the terminal receives the third SDAP PDU sent by the base station equipment and recognizes that the RQI identification field in the third SDAP PDU is a third value, the terminal analyzes the third SDAP PDU, acquires and stores the mapping rule of the updated SDF and the QoS flow, and simultaneously informs the NAS layer of the mapping rule of the updated SDF and the QoS flow.
In step S260, when the preset timer times out each time, the preset number of transmissions is reduced by one, and whether the reduced number of transmissions is zero is detected.
In this embodiment, since the terminal does not feed back to the base station device when receiving the third SDAP PDU or when not receiving the third SDAP PDU, in order to improve the probability that the terminal obtains the mapping rule of the updated SDF and QoS flow, the embodiment sets an RQI timer, subtracts one preset transmission number when the RQI timer expires each time, and detects whether the subtracted transmission number is zero.
Step S270, if the accumulated and subtracted number of times of transmission is not zero, the fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule.
The fourth SDAP PDU includes a RQI identification field, which is set to a third value.
If the accumulated and subtracted number of times of transmission is not zero, the base station device sends a fourth SDAP PDU to the terminal according to the updated mapping rule, and the RQI identification field of the fourth SDAP PDU is set to a third value to prompt the terminal to analyze the fourth SDAP PDU to obtain the updated mapping rule of the SDF and the QoS stream.
In this embodiment, if the update of the mapping rule is detected, the updated mapping rule is obtained; according to the updated mapping rule, a third SDAP PDU is sent to the terminal; subtracting one from the preset transmission times when the preset timer times out each time, and detecting whether the subtracted transmission times are zero; if the accumulated and subtracted number of times of transmission is not zero, a fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule; therefore, by setting the maximum transmission times, detecting whether the accumulated and subtracted transmission times are zero or not when the RQI timer times out each time, if not, transmitting a fourth SDAP PDU comprising the RQI identification field set to a third value to the terminal, improving the probability of the terminal obtaining the updated mapping rule of the SDF and the QoS flow, and ensuring that the terminal can correctly adopt the updated mapping rule of the SDF and the QoS flow under the condition of updating the mapping rule of the SDF and the QoS flow.
Fig. 8 is a flowchart of a data transmission method according to another embodiment, and on the basis of the embodiment shown in fig. 7, as shown in fig. 8, step S260 of this embodiment further includes step S280, specifically:
step S280, if the accumulated and subtracted number of times of transmission is zero, the fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule.
The fourth SDAP PDU includes a RQI identification field, which is set to a fourth value.
In this embodiment, if the accumulated and subtracted number of transmissions is zero, it indicates that the set maximum number of transmissions has been reached, and the base station device sends a fourth SDAP PDU to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field that is set to a fourth value that may be consistent with a representation of the second value, e.g., a "0," or may be distinguished from a representation of the first, second, and third values.
In this embodiment, after the set maximum number of times of transmission reaches, the RQI identification field is not set to the third value in the SDAP PDU subsequently transmitted by the base station device, and if the terminal receives the fourth SDAP PDU and recognizes that the RQI identification field included in the fourth SDAP PDU is set to the fourth value, the terminal will not parse the fourth SDAP PDU to obtain the updated mapping rule.
Based on the embodiment shown in fig. 7, in another embodiment, the mapping rule further includes a mapping rule of QoS flows and DRBs, and the third SDAP PDU further includes an RDI identification field set to a first value.
In this embodiment, if the base station device detects that the mapping rule is updated, the base station device obtains the updated mapping rule; according to the updated mapping rule, a third SDAP PDU is sent to the terminal; the third SDAP PDU comprises an RQI identification field, the RQI identification field is set to a third value, and the third value is used for indicating the terminal to analyze the third SDAP PDU to obtain the mapping rule of the updated SDF and the QoS stream; the third SDAP PDU also includes an RDI identification field set to a first value; the first value is used to instruct the terminal to parse the third SDAP PDU to obtain the updated mapping rule of the QoS flow and the DRB.
In this embodiment, if the base station device receives the feedback message sent by the terminal, the base station device sends a fourth SDAP PDU to the terminal according to the updated mapping rule; the fourth SDAP PDU includes an RDI identification field set to a second value.
Specifically, when a preset RQI timer times out, subtracting one from the preset transmission times, and detecting whether the subtracted transmission times are zero; if the accumulated and subtracted number of times of transmission is not zero and the feedback message sent by the terminal is received, the base station equipment sends a fourth SDAP PDU to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field, the RQI identification field being set to a third value, and the fourth SDAP PDU further includes an RDI identification field set to a second value.
Further, when a preset RQI timer is overtime, subtracting one from the preset transmission times, and detecting whether the subtracted transmission times are zero; if the accumulated and subtracted number of times of transmission is not zero and the feedback message sent by the terminal is not received, a fourth SDAP PDU is sent to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field, the RQI identification field being set to a third value, and the fourth SDAP PDU further includes an RDI identification field set to a first value.
In this embodiment, as an implementation manner, if the maximum number of times of transmission is not reached, but there is no data to be transmitted currently in the downlink data transmission, the base station device backs up the last packet of the SDAP PDU sent by the SDAP layer, and correspondingly sets the RQI identifier field and the RDI identifier field of the last packet of the SDAP PDU and sends the same.
Therefore, if the SDAP layer receives the mapping rule of the updated QoS flow and the DRB and the mapping rule of the updated SDF and the QoS flow carried in the downlink data of the core network, the base station device is implemented through the implementation of the embodiment, so that the probability of acquiring the updated mapping rule by the terminal is increased, and the normal transmission of the updated mapping rule is ensured.
Fig. 9 is a flowchart of a data transmission method according to another embodiment, and on the basis of the embodiment shown in fig. 7, as shown in fig. 9, the embodiment further includes step S500, specifically:
step S500, if the timer is not overtime and the updating of the mapping rule is detected, the SDAP PDU to be sent currently is sent to the terminal according to the latest mapping rule.
The currently pending SDAP PDU includes an RDI identification field set to a first value and/or an RQI identification field set to a third value.
In this embodiment, if the preset RQI timer does not timeout, the base station device obtains the mapping rule update from the core network side, and the base station device sets the RDI identifier field and the RQI identifier field of the currently to-be-transmitted SDAP PDU according to the latest mapping rule.
If the latest mapping rule is the updated mapping rule of the SDF and the QoS flow, the RQI identification field is set to a third value, if the latest mapping rule is the updated mapping rule of the QoS flow and the DRB, the RDI identification field is set to a first value, and if the latest mapping rule is the updated mapping rule of the QoS flow and the DRB, the RQI identification field and the RDI identification field are set correspondingly at the same time, and after setting, the RQI identification field and the RDI identification field are sent to the PDCP layer by the SDAP layer to be sent to the terminal. Therefore, the robustness of the updated mapping rule adopted by the terminal correctly is improved.
It should be understood that, although the steps in the flowcharts of fig. 2-9 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2-9 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the sub-steps or stages are performed necessarily occur in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
In one embodiment, as shown in fig. 10, there is provided a data transmission apparatus including:
an obtaining module 10, configured to obtain an updated mapping rule if an update of the mapping rule is detected; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow;
a first sending module 20, configured to send service data adaptation protocol SDAP protocol data unit PDU to the terminal for multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, where the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule.
Optionally, the mapping rule includes a mapping rule of QoS flows and DRBs; the first transmitting module 20 includes:
a first sending unit, configured to send a first SDAP PDU to a terminal according to the updated mapping rule; the first SDAP PDU comprises an RDI identification field, and the RDI identification field is set to a first value, wherein the first value is used for indicating the terminal to parse the first SDAP PDU to acquire the updated mapping rule;
the detection unit is used for detecting whether feedback information sent by the terminal is received or not according to a preset time period; the feedback message is used for determining that the terminal has stopped using the original mapping rule;
A second sending unit, configured to send a second SDAP PDU to the terminal according to the updated mapping rule if the feedback message is not received; the second SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the second SDAP PDU is a next SDAP PDU adjacent to the first SDAP PDU.
Optionally, the first sending module 20 further includes:
a third sending unit, configured to send a second SDAP PDU to the terminal according to the updated mapping rule if the feedback message is received; the second SDAP PDU includes an RDI identification field that is set to a second value, the second SDAP PDU being a next SDAP PDU adjacent to the first SDAP PDU.
Optionally, the apparatus further comprises:
and the second sending module is used for sending the second SDAP PDU to the terminal for multiple times according to the updated mapping rule until the feedback message is received if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be sent.
Optionally, the apparatus further comprises:
the generating module is configured to generate an internet packet explorer Ping packet if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be sent; the Ping packet includes an RDI identification field, the RDI identification field being set to a first value;
And the third sending module is used for sending the added Ping packet to the terminal for a plurality of times according to the updated mapping rule until the feedback message is received.
Optionally, the mapping rule includes a mapping rule of an SDF and a QoS flow; the first transmitting module 20 includes:
a fourth sending unit, configured to send a third SDAP PDU to a terminal according to the updated mapping rule; the third SDAP PDU includes an RQI identification field, the RQI identification field is set to a third value, and the third value is used for indicating the terminal to parse the third SDAP PDU to obtain the updated mapping rule;
the accumulation and subtraction unit is used for subtracting one preset transmission frequency from each time of timeout of the preset timer and detecting whether the accumulated and subtracted transmission frequency is zero or not;
a fifth sending unit, configured to send a fourth SDAP PDU to the terminal according to the updated mapping rule if the accumulated number of times of sending is not zero; the fourth SDAP PDU includes a RQI identification field, which is set to a third value.
Optionally, the first sending module 20 further includes:
a sixth sending unit, configured to send a fourth SDAP PDU to the terminal according to the updated mapping rule if the accumulated number of times of transmission is zero; the fourth SDAP PDU includes a RQI identification field, which is set to a fourth value.
Optionally, the mapping rule further includes a mapping rule of QoS flows and DRBs, and the third SDAP PDU further includes an RDI identification field set to a first value.
Optionally, the apparatus further comprises:
a fourth sending module, configured to send a fourth SDAP PDU to the terminal according to the updated mapping rule if a feedback message sent by the terminal is received; the fourth SDAP PDU includes an RDI identification field set to a second value.
Optionally, the apparatus further comprises:
a fifth sending module, configured to send, if the timer does not timeout and the mapping rule update is detected, a current SDAP PDU to be sent to the terminal according to the latest mapping rule; the SDAP PDU currently to be transmitted includes an RDI identification field set to a first value and/or an RQI identification field set to a third value.
The data transmission device provided in this embodiment may execute the above embodiment of the data transmission method, and its implementation principle and technical effects are similar, and will not be described herein again.
For specific limitations of the data transmission device, reference may be made to the above limitation of the data transmission method, and no further description is given here. The respective modules in the above-described data transmission apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a base station apparatus is provided, comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
if the updating of the mapping rule is detected, acquiring the updated mapping rule; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow; sending a Service Data Adaptation Protocol (SDAP) Protocol Data Unit (PDU) to a terminal for multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, where the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus (Ramb microsecond) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
if the updating of the mapping rule is detected, acquiring the updated mapping rule; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow; sending a Service Data Adaptation Protocol (SDAP) Protocol Data Unit (PDU) to a terminal for multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, where the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A method of data transmission, the method comprising:
if the updating of the mapping rule is detected, acquiring the updated mapping rule; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow, wherein the updated mapping rule is detected according to a data packet sent by a core network;
sending a Service Data Adaptation Protocol (SDAP) Protocol Data Unit (PDU) to a terminal for multiple times according to the updated mapping rule; each SDAP PDU comprises a rule analysis identifier, wherein the rule analysis identifier is used for instructing the terminal to analyze the SDAP PDU to acquire the updated mapping rule;
wherein, when the mapping rule includes a mapping rule of an SDF and a QoS flow, the sending, to the terminal, the SDAP PDU for multiple times according to the updated mapping rule includes:
according to the updated mapping rule, a third SDAP PDU is sent to the terminal; the third SDAP PDU includes an RQI identification field, the RQI identification field is set to a third value, and the third value is used for indicating the terminal to parse the third SDAP PDU to obtain the updated mapping rule;
Subtracting one from the preset transmission times when the preset timer times out each time, and detecting whether the subtracted transmission times are zero;
if the accumulated and subtracted number of times of transmission is not zero, a fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field, the RQI identification field being set to a third value;
wherein, in case the mapping rule comprises a mapping rule of QoS flows and DRBs; and sending SDAP PDU to the terminal for multiple times according to the updated mapping rule, comprising:
according to the updated mapping rule, a first SDAP PDU is sent to a terminal; the first SDAP PDU comprises an RDI identification field, and the RDI identification field is set to a first value, wherein the first value is used for indicating the terminal to parse the first SDAP PDU to acquire the updated mapping rule;
detecting whether feedback information sent by the terminal is received or not according to a preset time period; the feedback message is used for determining that the terminal stops using the original mapping rule, and the feedback message is an End-Marker PDU sent on the original DRB;
if the feedback message is not received, a second SDAP PDU is sent to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the second SDAP PDU is a next SDAP PDU adjacent to the first SDAP PDU;
After the second SDAP PDU is sent to the terminal according to the updated mapping rule, the method further comprises:
if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be sent, generating an Internet packet explorer Ping packet; the Ping packet includes an RDI identification field, the RDI identification field being set to a first value;
and sending the added Ping packet to the terminal for multiple times according to the updated mapping rule until the feedback message is received.
2. The data transmission method according to claim 1, characterized in that the method further comprises:
if the feedback message is received, a second SDAP PDU is sent to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field that is set to a second value, the second SDAP PDU being a next SDAP PDU adjacent to the first SDAP PDU.
3. The data transmission method according to claim 1, wherein after the second SDAP PDU is sent to the terminal according to the updated mapping rule, further comprising:
and if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be transmitted, transmitting the second SDAP PDU to the terminal for multiple times according to the updated mapping rule until the feedback message is received.
4. The data transmission method according to claim 1, characterized in that the method further comprises:
if the accumulated and subtracted number of times of transmission is zero, a fourth SDAP PDU is transmitted to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a RQI identification field, which is set to a fourth value.
5. The data transmission method of claim 1, wherein the mapping rule further comprises a mapping rule of QoS flows with DRBs, and wherein the third SDAP PDU further comprises an RDI identification field set to a first value.
6. The data transmission method according to claim 5, characterized in that the method further comprises:
if the feedback message sent by the terminal is received, a fourth SDAP PDU is sent to the terminal according to the updated mapping rule; the fourth SDAP PDU includes an RDI identification field set to a second value.
7. The data transmission method according to claim 1, characterized in that the method further comprises:
if the timer is not overtime and the mapping rule is detected to be updated, the SDAP PDU to be sent currently is sent to the terminal according to the latest mapping rule; the SDAP PDU currently to be transmitted includes an RDI identification field set to a first value and/or an RQI identification field set to a third value.
8. A data transmission apparatus, the apparatus comprising:
the acquisition module is used for acquiring the updated mapping rule if the mapping rule update is detected; the mapping rule comprises a mapping rule of a quality of service (QoS) flow and a Data Radio Bearer (DRB), and/or a mapping rule of a Service Data Flow (SDF) and a QoS flow, wherein the updated mapping rule is detected according to a data packet sent by a core network;
the first sending module is used for sending the service data adaptation protocol SDAP protocol data unit PDU to the terminal for a plurality of times according to the updated mapping rule; each SDAP PDU comprises a rule analysis identifier, wherein the rule analysis identifier is used for instructing the terminal to analyze the SDAP PDU to acquire the updated mapping rule;
wherein, in case the mapping rule includes a mapping rule of an SDF and a QoS flow, the first sending module includes:
a fourth sending unit, configured to send a third SDAP PDU to a terminal according to the updated mapping rule; the third SDAP PDU includes an RQI identification field, the RQI identification field is set to a third value, and the third value is used for indicating the terminal to parse the third SDAP PDU to obtain the updated mapping rule;
The accumulation and subtraction unit is used for subtracting one preset transmission frequency from each time of timeout of the preset timer and detecting whether the accumulated and subtracted transmission frequency is zero or not;
a fifth sending unit, configured to send a fourth SDAP PDU to the terminal according to the updated mapping rule if the accumulated number of times of sending is not zero; the fourth SDAP PDU includes a RQI identification field, the RQI identification field being set to a third value;
wherein, in case the mapping rule includes a mapping rule of QoS flows and DRBs, the first sending module includes:
a first sending unit, configured to send a first SDAP PDU to a terminal according to the updated mapping rule; the first SDAP PDU comprises an RDI identification field, and the RDI identification field is set to a first value, wherein the first value is used for indicating the terminal to parse the first SDAP PDU to acquire the updated mapping rule;
the detection unit is used for detecting whether feedback information sent by the terminal is received or not according to a preset time period; the feedback message is used for determining that the terminal stops using the original mapping rule, and the feedback message is an End-Marker PDU sent on the original DRB;
a second sending unit, configured to send a second SDAP PDU to the terminal according to the updated mapping rule if the feedback message is not received; the second SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the second SDAP PDU is a next SDAP PDU adjacent to the first SDAP PDU;
The apparatus further comprises:
the generating module is configured to generate an internet packet explorer Ping packet if the feedback message is not detected according to the time period and the second SDAP PDU is the last data packet to be sent; the Ping packet includes an RDI identification field, the RDI identification field being set to a first value;
and the third sending module is used for sending the added Ping packet to the terminal for a plurality of times according to the updated mapping rule until the feedback message is received.
9. A base station device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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