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

Abstract

The present application relates to a data transmission method, device, base station equipment and computer-readable storage medium. The data transmission method includes: if an update to the mapping rule is detected, obtaining the updated mapping rule; the mapping rule includes a mapping rule between a quality of service QoS flow and a data radio bearer DRB, and/or a service data flow SDF and a QoS flow. mapping rules; according to the updated mapping rules, send service data adaptation protocol SDAP protocol data unit PDU to the terminal multiple times; each of the SDAP PDUs includes a rule parsing identifier, and the rule parsing identifier is used to indicate to the terminal The SDAP PDU is parsed to obtain the updated mapping rules. Using this method can improve the possibility of normal transmission of updated mapping rules and improve the accuracy of data transmission.

Description

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

Technical field

The present invention relates to the field of communication technology, and in particular, to a data transmission method, device, base station equipment and computer-readable storage medium.

Background technique

In the 5G new air interface user plane protocol stack, a new protocol layer is introduced on top of the existing PDCP (Packet Data Convergence Protocol) layer: SDAP (Service Data Adaptation Protocol) layer . The SDAP layer can realize the mapping between QoS (Quality of Service, Quality of Service) flow and DRB (Data Radio Bearer, Data Radio Bearer). QoS flow is the finest QoS differentiation granularity in a PDU session.

In downlink data transmission, the base station equipment receives data packets from the network side and submits the data packets to the SDAP layer for processing; after processing by the SDAP layer, it is passed to the PDCP layer for processing, and then the PDCP layer passes it to the lower layer. After the data packet reaches the PDCP layer of the terminal through the lower layer, it is processed by the PDCP layer of the terminal and then passed to the SDAP layer of the terminal.

If the mapping rules between QoS flow and DRB, and the mapping rules between SDF (Service Data Flow, Service Data Flow) and QoS flow are updated, the base station equipment starts to use the updated mapping rules to send data packets to the terminal, and uses the updated mapping rules for the first time. When the mapping rule sends a data packet, the identification field in the data packet is set to the first value. If the SDAP layer of the terminal recognizes that the identification field in the data packet is the first value, it will parse the data packet and obtain the mapping rules between the QoS flow and the DRB in the data packet, and/or the SDF (Service Data Flow, business data flow) and QoS flow mapping rules and perform corresponding operations.

However, when the air interface is subject to greater interference or the service load is too heavy, the PDCP layer of the base station equipment will discard the data packets that have expired. Therefore, the above method will cause that after the mapping rules are updated, when the base station device uses the updated mapping rules to send a data packet to the terminal, the data packet is discarded by the base station before it is sent, causing the terminal to be unable to receive the data packet and thus unable to obtain it. Mapping rules in data packets, data transmission errors.

Contents of the invention

Based on this, it is necessary to provide a data transmission method, device, base station equipment and computer-readable storage medium that can improve the accuracy of data transmission in response to the above technical problems.

In a first aspect, embodiments of the present application provide a data transmission method. The data transmission method includes:

If an update to the mapping rule is detected, the updated mapping rule is obtained; the mapping rule includes the mapping rule between the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rule between the service data flow SDF and the QoS flow;

According to the updated mapping rules, send Service Data Adaptation Protocol SDAP Protocol Data Unit PDU to the terminal multiple times; each SDAP PDU includes a rule parsing identifier, and the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rules.

In one embodiment, the mapping rules include mapping rules between QoS flows and DRBs; and sending SDAP PDUs to the terminal multiple times according to the updated mapping rules includes:

According to the updated mapping rule, send the first SDAP PDU to the terminal; the first SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the first value is used to indicate to the terminal Parse the first SDAP PDU to obtain the updated mapping rule;

According to a preset time period, detect whether a feedback message sent by the terminal is received; the feedback message is used to determine that the terminal has stopped using the original mapping rule;

If the feedback message is not received, a second SDAPPDU is sent to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field, and the RDI identification field is set to the first value, And the second SDAP PDU is the next SDAP PDU adjacent to the first SDAP PDU.

In one embodiment, the method further includes:

If the feedback message is received, a second SDAPPDU is sent to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field, and the RDI identification field is set to the second value, so The second SDAPPDU is the next SDAP PDU adjacent to the first SDAP PDU.

In one embodiment, after sending the second SDAPPDU 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, then the third SDAP PDU is sent to the terminal multiple times according to the updated mapping rule. two SDAP PDUs until the feedback message is received.

In one embodiment, after sending the second SDAPPDU 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, an Internet packet explorer Ping packet is generated; the Ping packet includes an RDI identification field, so The RDI identification field is set to the first value;

According to the updated mapping rule, the added Ping packet is sent to the terminal multiple times until the feedback message is received.

In one embodiment, the mapping rules include mapping rules between SDF and QoS flows; and sending SDAP PDUs to the terminal multiple times according to the updated mapping rules includes:

According to the updated mapping rule, send a third SDAP PDU 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 to indicate to the terminal Parse the third SDAP PDU to obtain the updated mapping rule;

Each time the preset timer times out, the preset number of sending times is decremented by one, and the cumulative number of sending times is checked to see whether it is zero;

If the cumulative number of transmissions is not zero, a fourth SDAP PDU is sent to the terminal according to the updated mapping rule; the fourth SDAP PDU includes an RQI identification field, and the RQI identification field is set to the third Three values.

In one embodiment, the method further includes:

If the cumulative number of transmissions is zero, a fourth SDAP PDU is sent to the terminal according to the updated mapping rule; the fourth SDAP PDU includes an RQI identification field, and the RQI identification field is set to the fourth value.

In one embodiment, the mapping rules further include mapping rules between QoS flows and DRBs, and the third SDAP PDU further includes an RDI identification field set to a first value.

In one embodiment, the method further includes:

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 includes:

If the timer has not expired and an update to the mapping rule is detected, the SDAP PDU currently to be sent is sent to the terminal according to the latest mapping rule; the SDAP PDU currently to be sent includes the RDI set to the first value. The identification field, and/or, the RQI identification field set to the third value.

In a second aspect, embodiments of the present application provide a data transmission device. The data transmission device includes:

An acquisition module, configured to acquire the updated mapping rules if an update to the mapping rules is detected; the mapping rules include mapping rules for the quality of service QoS flow and the data radio bearer DRB, and/or the mapping between the service data flow SDF and the QoS flow. rule;

The first sending module is configured to send service data adaptation protocol SDAP protocol data unit PDU to the terminal multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, and the rule parsing identifier is used to indicate The terminal parses the SDAP PDU to obtain the updated mapping rule.

In a third aspect, embodiments of the present application provide a base station device, including a memory and a processor. The memory stores a computer program. When the processor executes the computer program, it implements the steps of the method described in the first aspect. .

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect are implemented.

The beneficial effects brought by the technical solutions provided by the embodiments of this application at least include:

If an update of the mapping rule is detected, the updated mapping rule is obtained; the mapping rule includes the mapping rule of the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rule of the service data flow SDF and the QoS flow; according to the required According to the updated mapping rules, the service data adaptation protocol SDAP protocol data unit PDU is sent to the terminal multiple times; each SDAP PDU includes a rule parsing identifier, and the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to Obtain the updated mapping rule; thereby, according to the updated mapping rule, send SDAP PDU including the rule parsing identifier to the terminal multiple times; avoiding the traditional technology, after the mapping rule is updated, the base station equipment uses the updated mapping rule to send When sending data, only in the first data packet, the identification field is set to the first value to prompt the terminal to parse the first data packet to obtain the updated mapping rules. As a result, the first data packet may be blocked by the base station. The PDCP layer of the device discards the data packet as a timeout, and the terminal cannot receive the first data packet, and thus cannot obtain the updated mapping rules, causing data transmission errors. This application improves the possibility of normal transmission of updated mapping rules and improves the accuracy of data transmission.

Description of the drawings

Figure 1 is an application environment diagram of a data transmission method provided by an embodiment;

Figure 2 is a schematic flowchart of a data transmission method provided by an embodiment;

Figure 3 is a schematic flow chart of a data transmission method provided by an embodiment;

Figure 4 is a schematic flow chart of a data transmission method provided by an embodiment;

Figure 5 is a schematic flowchart of a data transmission method provided by an embodiment;

Figure 6 is a schematic flowchart of a data transmission method provided by an embodiment;

Figure 7 is a schematic flow chart of a data transmission method provided by an embodiment;

Figure 8 is a schematic flowchart of a data transmission method provided by an embodiment;

Figure 9 is a schematic flowchart of a data transmission method provided by an embodiment;

Figure 10 is a structural block diagram of a data transmission device provided in an embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

The data transmission method, device, base station equipment and computer-readable storage medium provided by the embodiments of the present application are intended to solve the problem in traditional technology that after the mapping rules are updated, the terminal may not be able to obtain the update when the base station equipment uses the updated mapping rules to send data. Mapping rules, resulting in technical problems with low data transmission accuracy. The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below through embodiments and in conjunction with the accompanying drawings. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

The data transmission method provided by the embodiment of the present application can be applied to the base station equipment as shown in Figure 1. As shown in Figure 1, the SDAP layer is located above the PDCP layer. In the downlink communication link, when the SDAP layer receives the SDAP SDU from the upper layer QoS flow, it processes the SDAP SDU to obtain the SDAP PDU; the SDAP layer sends it to the PDCP layer through DRB. The SDAP PDU is processed by the lower layer in sequence and then sent to the terminal.

The execution subject of the data transmission method provided by the embodiments of the present application may be a data transmission device. The data transmission device may be implemented as part or all of the base station equipment through software, hardware, or a combination of software and hardware. In the following method embodiments, the execution subject is the base station device as an example for description.

Please refer to Figure 2, which shows a flow chart of a data transmission method provided by an embodiment of the present application. As shown in Figure 2, the data transmission method of this embodiment may include the following steps:

Step S100: If it is detected that the mapping rule is updated, the updated mapping rule is obtained.

The mapping rules include mapping rules between the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rules between the service data flow SDF and the QoS flow.

In this embodiment, when the base station device detects the update of the mapping rule between the QoS flow and the DRB, it may be detected through the received mapping rule modification message. The mapping rule modification message may be manually input to the base station device, and the base station device obtains the mapping rule from the mapping rule. Get updated mapping rules in the modification message. The base station device detects the update of the mapping rule between the QoS flow and the DRB, or it may detect it based on the data packet sent by the core network. The base station device parses the data packet sent by the core network to obtain the updated mapping rule between the QoS flow and the DRB.

Further, the base station device detects the update of the mapping rules between SDF and QoS flows, which may be detected based on the data packets sent by the core network. The base station device parses the data packets sent by the core network to obtain the updated mapping rules between SDF and QoS flows. .

Step S200: Send service data adaptation protocol SDAP protocol data unit PDU to the terminal multiple times according to the updated mapping rules.

Each SDAP PDU includes a rule parsing identifier, which is used to instruct the terminal to parse the SDAP PDU to obtain updated mapping rules.

In this embodiment, when reflection mapping rules are configured, after receiving the SDAP SDU, the SDAP layer adds SDAP header information to the SDAP SDU and forms an SDAP PDU after adding it. The SDAP header information includes QFI (QoS Flow ID, QoS flow identification) and rule resolution identification. In the 5G system, a QFI is used to identify a QoS flow, that is, which QoS flow the SDAP SDU corresponds to.

The base station device sends SDAP PDUs with SDAP header information added to the terminal multiple times according to the updated mapping rules, and each SDAP PDU includes a rule resolution identifier. Specifically, the SDAP layer of the base station device sends each SDAP PDU with the SDAP header information added to it in sequence to the PDCP layer of the base station device, and then sends it to the lower layer through the PDCP layer, and then the lower layer sends it to the terminal. 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 rules, resulting in the terminal not receiving the first SDAP PDU, however, the terminal receives the first SDAP PDU sent by the SDAP layer according to the updated mapping rules. The second SDAP PDU, the third SDAP PDU, or any SDAP PDU after the first SDAP PDU. Each SDAP PDU includes a rule parsing identifier. The terminal will parse the received SDAP according to the instructions of the rule parsing identifier. PDU to obtain updated mapping rules.

In this embodiment, if an update to the mapping rule is detected, the updated mapping rule is obtained; the mapping rule includes the mapping rule between the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rule between the service data flow SDF and the QoS flow; according to The updated mapping rules are sent to the terminal multiple times. Each SDAPPDU includes a rule parsing identifier. The rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain the updated mapping rules. Therefore, according to The updated mapping rules are used to send SDAP PDUs including the rule parsing identification to the terminal multiple times; this avoids the traditional technology that, after the mapping rules are updated, when the base station equipment uses the updated mapping rules to send data, only in the first data packet, Set the identification field to the first value to prompt the terminal to parse the first data packet to obtain updated mapping rules. As a result, the first data packet may be discarded by the PDCP layer of the base station device as a data packet that has expired, As a result, the terminal cannot receive the first data packet, and thus cannot obtain updated mapping rules, causing errors in data transmission. This embodiment improves the possibility of normal transmission of updated mapping rules and improves the accuracy of data transmission.

Figure 3 is a flow chart of a data transmission method provided by another embodiment. Based on the embodiment shown in Figure 2, step S200 of this embodiment includes step S210, step S220 and step S230. Specifically:

Step S210: Send the first SDAP PDU to the terminal according to the updated mapping rule.

The first SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the first value is used to instruct the terminal to parse the first SDAP PDU to obtain updated mapping rules.

In this embodiment, the mapping rules specifically include mapping rules between QoS flows and DRBs.

After the mapping rules between the QoS flow and the DRB are updated, the SDAP layer of the base station device receives the first SDAP SDU, adds SDAP header information to the first SDAP SDU, and forms the first SDAP PDU after adding it; the SDAP layer follows the updated QoS flow and DRB. The mapping rule is to send the first SDAP PDU to the PDCP layer of the base station device, and then send it to the terminal after being processed by the PDCP layer and lower layers. In this embodiment, the SDAP header information specifically includes QFI and RDI identification fields. The RDI identification field is set to a first value by the base station device. The first value may be "1"; in other embodiments, the first value may also be other values. representation.

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 the first value, it parses the first SDAP PDU and obtains the updated mapping rules between the QoS flow and the DRB. , and reflect the updated mapping rules between the QoS flow and the DRB to the uplink communication link.

Step S220: Check whether a feedback message sent by the terminal is received according to a preset time period.

The feedback message is used to determine that the terminal has stopped using the original mapping rules.

In this embodiment, the feedback message is End-Marker PDU. If the terminal receives the first SDAP PDU and parses the first SDAP PDU to obtain the updated mapping rules between the QoS flow and the DRB, it will send the End-Marker on the original DRB. PDU to base station equipment. By parsing the End-Marker PDU, the base station device determines that the terminal will subsequently stop transmitting the QoS flow pointed to by the QFI field of the End-Marker PDU on the original DRB.

In this embodiment, the base station equipment sets an RDI timer. After the RDI timer reaches a preset time period, the base station equipment is triggered to detect whether the feedback message sent by the terminal is received.

Step S230: If no feedback message is received, the second SDAPPDU 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 the first value, and the second SDAP PDU is the next SDAP PDU adjacent to the first SDAP PDU.

If the base station device does not receive the feedback message, it means that the terminal has not received the first SDAP PDU; for the SDAP PDU that the base station device needs to send in the next packet, that is, the second SDAP PDU, the base station device sets the RDI identification field of the second SDAP PDU. After reaching the first value, it is sent to the terminal.

Specifically, if the base station device does not receive the feedback message and the SDAP layer of the base station device receives the second SDAP SDU, it adds SDAP header information to the second SDAP SDU, specifically adding the QFI and the RDI identification field set to the first value. , the second SDAP PDU is formed after being added; the SDAP layer sends the second SDAP PDU to the PDCP layer of the base station device according to the updated mapping rules between the QoS flow and the DRB, and is processed by the PDCP layer and lower layers before being sent to the terminal.

If the terminal receives the second SDAP PDU sent by the base station equipment and recognizes that the RDI identification field in the second SDAP PDU is the first value, it parses the second SDAP PDU and obtains the updated mapping rules between the QoS flow and the DRB. and reflect the updated mapping rule between the QoS flow and the DRB to the uplink communication link.

It is understandable that the terminal may still not receive the second SDAP PDU due to air interface interference or PDCP layer discarding. If the base station equipment does not detect the feedback message sent by the terminal according to the preset time period, the next SDAP PDU to be sent after the second SDAPPDU will also add the QFI and the RDI identification field set to the first value before sending; If the base station device still does not detect the feedback message, the subsequent SDAP PDUs that need to be sent are processed in the same manner until the feedback message sent by the terminal is received.

In this embodiment, if an update to the mapping rule is detected, the updated mapping rule is obtained; according to the updated mapping rule, the first SDAP PDU is sent to the terminal; according to the preset time period, it is detected whether a feedback message sent by the terminal is received; if If no feedback message is received, the second SDAP PDU is sent to the terminal according to the updated mapping rules; therefore, if no feedback message is received, the QFI and the RDI set to the first value are continued to be added to the SDAP PDU to be sent. The identification field is used to instruct the terminal to parse the received SDAP PDU to obtain the updated mapping rules, which improves the probability that the terminal obtains the updated mapping rules and improves the robustness of the terminal to correctly adopt the modified mapping rules; this embodiment is used on the air interface In the case of severe interference, it ensures the normal transmission of mapping rules and improves the accuracy of data transmission.

Figure 4 is a flow chart of a data transmission method provided by another embodiment. Based on the above embodiment shown in Figure 3, after step S220, this embodiment also 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.

In this embodiment, the second SDAP PDU includes an RDI identification field, the RDI identification field is set to the second value, and the second SDAPPDU is 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 means that the terminal has received the first SDAP PDU and has obtained the updated mapping rules between the QoS flow and the DRB. The base station device then sends the subsequent SDAP PDU. , the RDI identification field of the SDAP PDU is set to a second value, and the second value may be "0". In other embodiments, the second value may also be other representations 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, it will not parse the second SDAP PDU to obtain updated mapping rules.

Figure 5 is a flow chart of a data transmission method provided by another embodiment. Based on the embodiment shown in Figure 3, this embodiment also includes step S300 after step S230, 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 multiple times according to the updated mapping rules until the feedback message is received. .

In this embodiment, if there is no data to be sent in the current downlink data transmission, that is, the second SDAP PDU is the last data packet to be sent and has been sent by the SDAP layer, but the base station device has not yet received the feedback message sent by the terminal, This means that the terminal has not received any SDAP PDU with the RDI identification field set to the first value, that is, the terminal has not obtained the updated mapping rules between QoS flows and DRBs.

In order to ensure that the terminal can obtain the updated mapping rules between the QoS flow and the DRB, the base station device backs up the last SDAP PDU sent, that is, the second SDAP PDU. The second SDAP PDU includes the QFI and is set to the first value. RDI identification field; the base station equipment detects whether the feedback message sent by the terminal is received every preset time period. If the feedback message is not received, it continues to send the backup second SDAP PDU until the feedback message is received. This improves the probability that the terminal obtains the updated mapping rules between the QoS flow and the DRB, ensures the normal delivery of the mapping rules when there is no data to be sent in the downlink data transmission, and improves the accuracy of subsequent data transmission.

Figure 6 is a flow chart of a data transmission method provided by another embodiment. Based on the embodiment shown in Figure 3, this embodiment also includes step S410 and step S420 after step S230. Specifically:

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 sent, an Internet packet explorer ping packet is generated.

The Ping packet includes an RDI identification field, and the RDI identification field is set to the first value.

In this embodiment, if there is no data to be sent in the current downlink data transmission, that is, the second SDAP PDU is the last data packet to be sent and has been sent by the SDAP layer, but the base station device has not yet received the feedback message sent by the terminal, This means that the terminal has not received any SDAP PDU with the RDI identification field set to the first value, that is, the terminal has not obtained the updated mapping rules between QoS flows and DRBs.

In order to ensure that the terminal can obtain the updated mapping rules between the QoS flow and the DRB, the base station device generates an Internet packet explorer ping packet, and adds the QFI and the RDI identification field set to the first value to the ping packet.

Step S420: Send the added Ping packets to the terminal multiple times according to the updated mapping rules until a feedback message is received.

The base station equipment detects whether the feedback message sent by the terminal is received every preset time period. If the feedback message is not received, the ping packet is sent until the feedback message is received. This improves the probability that the terminal obtains the updated mapping rules between the QoS flow and the DRB, ensures the normal delivery of the mapping rules when there is no data to be sent in the downlink data transmission, and improves the accuracy of subsequent data transmission.

Figure 7 is a flow chart of a data transmission method provided by another embodiment. Based on the above embodiment shown in Figure 2, as shown in Figure 7, step S200 in this embodiment includes step S250, step S260 and step S270. Specifically, land:

Step S250: Send the third SDAP PDU to the 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. The third value is used to instruct the terminal to parse the third SDAP PDU to obtain updated mapping rules.

In this embodiment, the mapping rules specifically include mapping rules between SDF and QoS flows.

After the base station equipment obtains the updated mapping rules between SDF and QoS flows from the core network side, the SDAP layer of the base station equipment receives the third SDAP SDU, adds SDAP header information to the third SDAP SDU, and forms the third SDAP PDU after addition; SDAP layer According to the updated mapping rules between SDF and QoS flows, the third SDAP PDU is sent to the PDCP layer of the base station equipment, and is processed by the PDCP layer and lower layers before being sent to the terminal. In this embodiment, the SDAP header information specifically includes QFI and RQI identification fields. The RQI identification field is set to a third value by the base station device. The third value can be consistent with the expression form of the first value, for example, "1", or it can be Other forms of expression that are different from the first value and the second value.

If the terminal receives the third SDAP PDU sent by the base station device and recognizes that the RQI identification field in the third SDAP PDU is the third value, it parses the third SDAP PDU and obtains the updated mapping rules between SDF and QoS flows. And save it, and at the same time notify the NAS layer of the updated SDF and QoS flow mapping rules.

Step S260: Each time the preset timer times out, the preset number of sending times is decremented by one, and whether the accumulated number of sending times is zero is detected.

In this embodiment, since the terminal does not give feedback to the base station device when it receives the third SDAP PDU or does not receive the third SDAP PDU, therefore, in order to improve the probability that the terminal obtains the updated mapping rules between SDF and QoS flows, this The embodiment sets an RQI timer, and each time the RQI timer times out, the preset number of transmissions is decremented by one, and whether the accumulated number of transmissions is zero is detected.

Step S270: If the accumulated number of transmissions is not zero, the fourth SDAP PDU is sent to the terminal according to the updated mapping rule.

The fourth SDAP PDU includes an RQI identification field, and the RQI identification field is set to a third value.

If the cumulative number of transmissions is not zero, the base station device sends the 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 the third value to prompt the terminal to parse the fourth SDAP PDU. Four SDAP PDUs to obtain the updated SDF and QoS flow mapping rules.

In this embodiment, if an update to the mapping rule is detected, the updated mapping rule is obtained; the third SDAP PDU is sent to the terminal according to the updated mapping rule; each time the preset timer times out, the preset number of sending times is Decrement one, and check whether the cumulative number of transmissions is zero; if the cumulative number of transmissions is not zero, the fourth SDAP PDU is sent to the terminal according to the updated mapping rules; thus, by setting the maximum number of transmissions, Each time the RQI timer times out, check whether the accumulated number of transmissions is zero. If not, send the fourth SDAPPDU including the RQI identification field set to the third value to the terminal, which improves the terminal's ability to obtain updates. The probability of mapping rules between SDF and QoS flows ensures that when the mapping rules between SDF and QoS flows are updated, the terminal can correctly adopt the updated mapping rules between SDF and QoS flows.

Figure 8 is a flow chart of a data transmission method provided by another embodiment. Based on the above embodiment shown in Figure 7, as shown in Figure 8, this embodiment also includes step S280 after step S260, specifically:

Step S280: If the accumulated number of transmissions is zero, the fourth SDAP PDU is sent to the terminal according to the updated mapping rule.

The fourth SDAP PDU includes an RQI identification field, and the RQI identification field is set to a fourth value.

In this embodiment, if the cumulative number of transmissions is zero, it means that the set maximum number of transmissions has been reached, and the base station device sends the fourth SDAP PDU to the terminal according to the updated mapping rules; the fourth SDAP PDU includes an RQI identification field. , the RQI identification field is set to the fourth value. The fourth value may be consistent with the second value, for example, "0", or may be different from the first value, the second value, and the third value.

In this embodiment, after the set maximum number of transmissions is reached, the RQI identification field will not be set to the third value in the SDAP PDU subsequently sent by the base station device. If the terminal receives the fourth SDAP PDU and recognizes the fourth SDAP If the RQI identification field included in the PDU is set to the fourth value, the fourth SDAP PDU will not be parsed to obtain updated mapping rules.

Based on the above embodiment shown in Figure 7, in another embodiment, the mapping rules further include mapping rules between 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 an update to the mapping rules, it obtains the updated mapping rules; according to the updated mapping rules, it sends the third SDAP PDU to the terminal; the third SDAP PDU includes an RQI identification field, and the RQI identification field is set to The third value is used to instruct the terminal to parse the third SDAP PDU to obtain the updated mapping rules between SDF and QoS flows; the third SDAP PDU also includes an RDI identification field set to the first value; the first value is used to indicate The terminal parses the third SDAP PDU to obtain the updated mapping rule between the QoS flow and the DRB.

In this embodiment, if the base station device receives the feedback message sent by the terminal, it sends the fourth SDAP PDU to the terminal according to the updated mapping rule; the fourth SDAP PDU includes the RDI identification field set to the second value.

Specifically, when the preset RQI timer times out, the preset number of transmissions is decremented by one, and whether the cumulative number of transmissions is zero is detected; if the cumulative number of transmissions is not zero, and the number of transmissions sent by the terminal is received feedback message, the base station device sends the fourth SDAP PDU to the terminal according to the updated mapping rules; the fourth SDAP PDU includes the RQI identification field, the RQI identification field is set to the third value, and the fourth SDAP PDU also includes the third value. A binary RDI identification field.

Further, when the preset RQI timer times out, the preset number of transmissions is decremented by one, and whether the cumulative number of transmissions is zero is detected; if the cumulative number of transmissions is not zero and the terminal has not received The feedback message sent is sent to the terminal in accordance with the updated mapping rules; the fourth SDAP PDU includes an RQI identification field, and the RQI identification field is set to the third value. The fourth SDAP PDU also includes an RQI identification field set to the first value. The RDI identification field of the value.

In this embodiment, as an implementation method, if the maximum number of transmissions has not been reached, but there is currently no data to be sent in the downlink data transmission, the base station device backs up the last SDAP PDU sent by the SDAP layer, and sets the last packet accordingly. Pack the RQI identification field and RDI identification field of the SDAP PDU and send it out.

Therefore, if the SDAP layer receives the core network downlink data carrying updated mapping rules between QoS flows and DRBs and updated mapping rules between SDF and QoS flows, the base station equipment implements the implementation through the implementation method of this embodiment, adding the terminal to obtain updates. The probability of the subsequent mapping rules ensures the normal delivery of the updated mapping rules.

Figure 9 is a flow chart of a data transmission method provided by another embodiment. Based on the embodiment shown in Figure 7, as shown in Figure 9, this embodiment also includes step S500, specifically:

Step S500: If the timer has not expired and an update to the mapping rule is detected, the SDAP PDU currently to be sent is sent to the terminal according to the latest mapping rule.

The SDAP PDU currently to be sent 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 has not expired and the base station equipment obtains the mapping rule update from the core network side, the base station equipment sets the RDI identification field and RQI identification of the SDAP PDU currently to be sent according to the latest mapping rules. field.

If the latest mapping rule is the mapping rule between the updated SDF and QoS flows, the RQI identification field is set to the third value. If the latest mapping rule is the mapping rule between the updated QoS flow and the DRB, the RDI identification field is set to The first value, if both are updated to the latest at the same time, the RQI identification field and the RDI identification field are set accordingly at the same time. After setting, the SDAP layer sends it to the PDCP layer to send it to the terminal. This improves the robustness of the updated mapping rule being correctly adopted by the terminal.

It should be understood that although the various steps in the flowcharts of Figures 2-9 are shown in sequence as indicated by arrows, these steps are not necessarily executed in the order indicated by arrows. Unless explicitly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figures 2-9 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times. These sub-steps or stages The order of execution is not necessarily sequential, but may be performed in turn or alternately with other steps or sub-steps of other steps or at least part of the stages.

In one embodiment, as shown in Figure 10, a data transmission device is provided, including:

The acquisition module 10 is configured to acquire the updated mapping rules if an update of the mapping rules is detected; the mapping rules include the mapping rules of the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rules of the service data flow SDF and the QoS flow. Mapping rules;

The first sending module 20 is configured to send service data adaptation protocol SDAP protocol data unit PDU to the terminal multiple times according to the updated mapping rule; each SDAP PDU includes a rule parsing identifier, and the rule parsing identifier is used to Instruct the terminal to parse the SDAP PDU to obtain the updated mapping rule.

Optionally, the mapping rules include mapping rules between QoS flows and DRBs; the first sending module 20 includes:

The first sending unit is configured to send a first SDAP PDU to the terminal according to the updated mapping rule; the first SDAP PDU includes an RDI identification field, the RDI identification field is set to a first value, and the first The value is used to instruct the terminal to parse the first SDAP PDU to obtain the updated mapping rule;

A detection unit configured to detect whether a feedback message sent by the terminal is received according to a preset time period; the feedback message is used to determine that the terminal has stopped using the original mapping rule;

The second sending unit is configured to, if the feedback message is not received, send a second SDAP PDU to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field, and the RDI identification field field is set to the first value, and the second SDAP PDU is the next SDAP PDU adjacent to the first SDAP PDU.

Optionally, the first sending module 20 also includes:

The third sending unit is configured to, if the feedback message is received, send a second SDAP PDU to the terminal according to the updated mapping rule; the second SDAP PDU includes an RDI identification field, and the RDI identification field is set to the second value, and the second SDAP PDU is the next SDAP PDU adjacent to the first SDAP PDU.

Optionally, the device also includes:

The second sending module is configured to, 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, send the message to the The terminal sends the second SDAP PDU multiple times until receiving the feedback message.

Optionally, the device also includes:

Generating module, configured to generate an Internet packet explorer ping packet if the feedback message is not detected according to the time period and the second SDAPPDU is the last data packet to be sent; the ping packet includes RDI Identification field, the RDI identification field is set to the first value;

The third sending module is configured to send the added Ping packet to the terminal multiple times according to the updated mapping rule until the feedback message is received.

Optionally, the mapping rules include mapping rules between SDF and QoS flows; the first sending module 20 includes:

The fourth sending unit is configured to send a third SDAP PDU to the 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 The value is used to instruct the terminal to parse the third SDAP PDU to obtain the updated mapping rule;

The cumulative subtraction unit is used to decrement the preset number of transmissions by one every time the preset timer times out, and detect whether the cumulative number of transmissions is zero;

The fifth sending unit is configured to send a fourth SDAP PDU to the terminal according to the updated mapping rule if the cumulative number of sending times is not zero; the fourth SDAP PDU includes an RQI identification field, and the The RQI identification field is set to the third value.

Optionally, the first sending module 20 also includes:

The sixth sending unit is configured to send a fourth SDAP PDU to the terminal according to the updated mapping rule if the cumulative number of transmissions is zero; the fourth SDAP PDU includes an RQI identification field, and the RQI The identification field is set to the fourth value.

Optionally, the mapping rules further include mapping rules between QoS flows and DRBs, and the third SDAP PDU further includes an RDI identification field set to a first value.

Optionally, the device also includes:

The fourth sending module is configured to, if the feedback message sent by the terminal is received, send a fourth SDAP PDU to the terminal according to the updated mapping rule; the fourth SDAP PDU includes a second value set to the second value. RDI identification field.

Optionally, the device also includes:

The fifth sending module is configured to send the SDAP PDU currently to be sent to the terminal according to the latest mapping rule if the timer has not expired and an update to the mapping rule is detected; the SDAP PDU currently to be sent includes The RDI identification field is set to the first value, and/or the RQI identification field is set to the third value.

The data transmission device provided in this embodiment can execute the above-mentioned data transmission method embodiment. Its implementation principles and technical effects are similar and will not be described again here.

For specific limitations on the data transmission device, please refer to the above limitations on the data transmission method, which will not be described again here. Each module in the above data transmission device can be implemented in whole or in part by software, hardware and combinations thereof. Each of the above modules may be embedded in or independent of the processor of the computer device in the form of hardware, or may be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

In one embodiment, a base station device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the following steps:

If an update to the mapping rule is detected, the updated mapping rule is obtained; the mapping rule includes the mapping rule between the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rule between the service data flow SDF and the QoS flow; as described Updated mapping rules, send service data adaptation protocol SDAP protocol data unit PDU to the terminal multiple times; each SDAP PDU includes a rule parsing identifier, and the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain The updated mapping rules.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage. In the media, when executed, the computer program may include the processes of the above method embodiments. Any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and/or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Synchlink DRAM (SLDRAM), memory bus (Ramb microsecond) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

In one embodiment, a computer-readable storage medium is provided with a computer program stored thereon. When the computer program is executed by a processor, the following steps are implemented:

If an update to the mapping rule is detected, the updated mapping rule is obtained; the mapping rule includes the mapping rule between the quality of service QoS flow and the data radio bearer DRB, and/or the mapping rule between the service data flow SDF and the QoS flow; as described Updated mapping rules, send service data adaptation protocol SDAP protocol data unit PDU to the terminal multiple times; each SDAP PDU includes a rule parsing identifier, and the rule parsing identifier is used to instruct the terminal to parse the SDAP PDU to obtain The updated mapping rules.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-mentioned embodiments only express several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should 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.