WO2018059414A1 - 数据传输方法及装置 - Google Patents
数据传输方法及装置 Download PDFInfo
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- WO2018059414A1 WO2018059414A1 PCT/CN2017/103557 CN2017103557W WO2018059414A1 WO 2018059414 A1 WO2018059414 A1 WO 2018059414A1 CN 2017103557 W CN2017103557 W CN 2017103557W WO 2018059414 A1 WO2018059414 A1 WO 2018059414A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
Definitions
- the present disclosure relates to the field of wireless communications technologies, and in particular, to a data transmission method and apparatus.
- 5G 5 th generation communication technology, the fifth-generation mobile communication technology
- network NR New Radio, a new air interface
- NR New Radio, a new air interface
- SN Sequence Number
- ARQ Automatic Repeat-reQuest
- the receiving end may wait indefinitely for a packet corresponding to the SN that the sender does not send at all, resulting in a receiving window. Unable to move, the receiving window is stagnant, and the data cannot be transmitted normally.
- the technical problem to be solved by the present disclosure is to provide a data transmission method and apparatus, which can solve the problem that an automatic retransmission request cannot be performed for a multi-connection separated bearer under the NR single-layer SN structure, so that data is normally transmitted.
- a data transmission method for a data sending entity in a 5G network, the method comprising:
- the sending the first status report to the data receiving entity includes:
- the first status report is sent to the data receiving entity when a preset condition is met.
- the preset conditions include:
- the number of PDUs sent by the data sending entity to the data receiving entity reaches N;
- the total number of bytes of the PDU sent by the data sending entity to the data receiving entity reaches M;
- M and N are integers not less than one.
- the first status report is an independent PDU, and the PDU of the first status report includes a PDU payload and a corresponding PDU header.
- the length of the PDU of the first status report is fixed;
- the length of the PDU of the first status report is not fixed, and the first status report includes information about the SN and an identifier corresponding to the information of the SN, and the identifier indicates whether there are other SNs after the information corresponding to the SN. Information.
- the content of the PDU payload includes:
- the information of the SNs of all the PDUs sent by the data transmitting entity between the time when the first status report was last sent and the time when the first status report is currently sent.
- the information of the SN in the first status report is the SN of all the PDUs sent by the data sending entity between the time when the first status report is sent last time and the time when the first status report is currently sent; or
- the SN of all the PDUs sent by the data sending entity is compared with the last status report sent last time.
- the first status report is carried in a data PDU
- the first status report includes:
- the first status report is carried in a data PDU
- the first status report includes:
- the method further includes:
- the embodiment of the present disclosure further provides a data transmission method, which is applied to a data receiving entity in a 5G network, where the method includes:
- the method further includes:
- the embodiment of the present disclosure further provides a data transmission apparatus, which is applied to a data sending entity in a 5G network, where the apparatus includes:
- a recording module configured to record the SN of the sent PDU after sending the PDU to the data receiving entity
- a sending module configured to send, to the data receiving entity, a first status report, where the first status report carries information about the SN.
- the sending module is specifically configured to send the first status report to the data receiving entity according to a preset sending period
- the first status report is sent to the data receiving entity when a preset condition is met.
- the preset conditions include:
- the number of PDUs sent by the data sending entity to the data receiving entity reaches N;
- the total number of bytes of the PDU sent by the data sending entity to the data receiving entity reaches M;
- M and N are integers not less than one.
- the first status report is an independent PDU, and the PDU of the first status report includes a PDU payload and a corresponding PDU header.
- the length of the PDU of the first status report is fixed;
- the length of the PDU of the first status report is not fixed, and the first status report includes information about the SN and an identifier corresponding to the information of the SN, and the identifier indicates whether there are other SNs after the information corresponding to the SN. Information.
- the content of the PDU payload includes:
- the information of the SNs of all the PDUs sent by the data transmitting entity between the time when the first status report was last sent and the time when the first status report is currently sent.
- the information of the SN in the first status report is the SN of all the PDUs sent by the data sending entity between the time when the first status report is sent last time and the time when the first status report is currently sent; or
- the SN of all the PDUs sent by the data sending entity is relative to the largest SN or the SN included in the first status report sent last time.
- the offset value of the previous SN is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is SN.
- the first status report is carried in a data PDU
- the first status report includes:
- the first status report is carried in a data PDU
- the first status report includes:
- the first status report includes an SN of the data PDU and an offset value of an SN of the N PDUs sent by the data transmitting entity with respect to the SN of the data PDU after the data PDU; or
- the device further includes:
- a first receiving module configured to receive a second status report sent by the data receiving entity, where the second status report carries the data sending entity but the data receiving entity is not correctly connected Receiving the information of the SN of the lost PDU;
- a retransmission module configured to resend the lost PDU to the data receiving entity according to the information of the SN in the second status report.
- the embodiment of the present disclosure further provides a data transmission apparatus, which is applied to a data receiving entity in a 5G network, where the apparatus includes:
- a second receiving module configured to receive a first status report sent by the data sending entity, where the first status report carries information about a SN of the PDU sent by the data sending entity to the data receiving entity;
- a feedback module configured to send, according to the information of the SN, that the PDU sent by the data sending entity is inconsistent with the PDU correctly received by the data receiving entity, send a second status report to the data sending entity, where the second The status report carries information about the SN of the lost PDU sent by the data sending entity but not correctly received by the data receiving entity.
- the device further includes:
- a submitting module configured to: when determining, according to the information of the SN, that the PDU sent by the data sending entity is consistent with the PDU correctly received by the data receiving entity, submit the correctly received sequence data packet to the upper layer, where the data packet The data receiving entity processes the received PDU, and moves the lower boundary of the receiving window to the next SN of the SN that was last submitted to the upper layer.
- the embodiment of the present disclosure further provides a data transmission apparatus, which is applied to a data sending entity in a 5G network, and includes:
- transceiver for receiving and transmitting data under the control of the processor
- the processor is configured to do the following:
- the embodiment of the present disclosure further provides a data transmission apparatus, which is applied to a data receiving entity in a 5G network and includes:
- transceiver for receiving and transmitting data under the control of the processor
- the processor is configured to do the following:
- the data sending entity Receiving, by the data sending entity, a first status report, where the first status report carries information about an SN (Serial Number) of the PDU (Protocol Data Unit) sent by the data sending entity to the data receiving entity;
- SN Serial Number
- PDU Protocol Data Unit
- Embodiments of the present disclosure also provide a non-transitory computer readable storage medium storing computer readable instructions executable by a processor, the computer readable instructions being executed by a processor
- the processor performs the following operations:
- Embodiments of the present disclosure also provide a non-transitory computer readable storage medium storing computer readable instructions executable by a processor, the computer readable instructions being executed by a processor
- the processor performs the following operations:
- the data sending entity Receiving, by the data sending entity, a first status report, where the first status report carries information about an SN (Serial Number) of the PDU (Protocol Data Unit) sent by the data sending entity to the data receiving entity;
- SN Serial Number
- PDU Protocol Data Unit
- the SN of the sent PDU is recorded, and the first status report carrying the information of the SN is sent to the data receiving entity
- the first status report data receiving entity can determine which PDUs are lost PDUs sent by the data sending entity but not correctly received by the data receiving entity, and feed back information of the SNs of the lost PDUs to the data sending entity, so that the data sending entity resends These PDUs, in turn, enable data to be transmitted normally.
- FIG. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present disclosure
- FIG. 2 is a block diagram showing the structure of a data transmission device according to an embodiment of the present disclosure
- FIG. 3 is a schematic flow chart of a data transmission method according to an embodiment of the present disclosure.
- FIG. 4 is a block diagram showing the structure of a data transmission device according to an embodiment of the present disclosure.
- Figure 5 is a schematic diagram of the architecture of a 5G network
- FIG. 6 is a schematic flow chart of a data transmission method according to an embodiment of the present disclosure.
- FIG. 7 is a format diagram of a PDU of a transmission status report according to an embodiment of the present disclosure.
- FIG. 8 is a flow chart showing a data transmission method according to an embodiment of the present disclosure.
- FIG. 9 is a schematic structural diagram of a computer system suitable for implementing a data transmission method or a data transmission device according to an embodiment of the present application.
- the embodiment of the present disclosure provides a data transmission method and device for the problem that an automatic retransmission request cannot be performed for a multiple-connected split bearer under the existing NR single-layer SN structure of the 5G network, and can solve the NR single-layer SN structure.
- the problem of automatic retransmission request cannot be performed, so that the data is transmitted normally.
- An embodiment of the present disclosure provides a data transmission method, which is applied to a data sending entity in a 5G network. As shown in FIG. 1, the method includes:
- Step 101 After transmitting a PDU (Protocol Data Unit) to the data receiving entity, record the SN of the sent PDU;
- PDU Protocol Data Unit
- Step 102 Send a first status report to the data receiving entity, where the first status report The information of the SN is carried in the middle.
- the data sending entity after transmitting the PDU to the data receiving entity, the data sending entity records the SN of the sent PDU, and sends a first status report carrying the information of the SN to the data receiving entity, and receives the data through the first status report.
- the entity may determine which PDUs are lost PDUs sent by the data sending entity but are not correctly received by the data receiving entity, and feed back information of the SNs of the lost PDUs to the data sending entity, so that the data sending entity resends the PDUs, so that the data can be normal. transmission.
- the sending the first status report to the data receiving entity includes:
- the first status report is sent to the data receiving entity when a preset condition is met.
- the preset conditions include:
- the number of PDUs sent by the data sending entity to the data receiving entity reaches N;
- the total number of bytes of the PDU sent by the data sending entity to the data receiving entity reaches M;
- M and N are integers not less than one.
- the RLC AM transmitting entity can be triggered by a polling process.
- the RLC AM receiving entity sends a status report to the RLC AM transmitting entity.
- the RLC AM sending entity updates the sending window or performs an RLC retransmission operation according to the status report.
- the triggering mechanism is configurable. Once the upper layer configures a polling trigger mechanism based on the number of PDUs or the number of PDU bytes, the specific operation of the sending end is as follows:
- PDU_WITHOUT_POLL PDU_WITHOUT_POLL+1;
- BYTE_WITHOUT_POLL The number of bytes that have not been polled
- the Poll bit is carried when the RLC data PDU is organized.
- the inquiry trigger is triggered based on the last PDU in the transmission buffer or the retransmission buffer.
- the polling trigger condition in this embodiment is similar to the polling trigger condition in the LTE system.
- the first status report is an independent PDU, and the PDU of the first status report includes a PDU payload and a corresponding PDU header.
- the length of the PDU of the first status report is fixed;
- the length of the PDU of the first status report is not fixed, and the first status report includes information about the SN and an identifier corresponding to the information of the SN, and the identifier indicates whether there are other SNs after the information corresponding to the SN. Information.
- the content of the PDU payload includes:
- the information of the SNs of all the PDUs sent by the data transmitting entity between the time when the first status report was last sent and the time when the first status report is currently sent.
- the information of the SN in the first status report is the SN of all the PDUs sent by the data sending entity between the time when the first status report is sent last time and the time when the first status report is currently sent; or
- the SN of all the PDUs sent by the data sending entity is relative to the largest SN or the SN included in the first status report sent last time.
- the offset value of the previous SN is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is SN.
- the first status report is carried in a data PDU
- the first status report includes an SN of N PDUs sent by the data transmitting entity before the data PDU;
- the first status report includes an SN of N PDUs sent by the data transmitting entity after the data PDU.
- the first status report is carried in a data PDU
- the first status report includes an SN of the data PDU and an offset value of an SN of the N PDUs sent by the data transmitting entity with respect to the SN of the data PDU before the data PDU;
- the first status report includes an SN of the data PDU and an offset value of an SN of the N PDUs sent by the data transmitting entity with respect to the SN of the data PDU after the data PDU.
- the method further includes:
- An embodiment of the present disclosure further provides a data transmission apparatus, which is applied to a data sending entity in a 5G network. As shown in FIG. 2, the apparatus includes:
- the recording module 21 is configured to: after transmitting the PDU to the data receiving entity, record the SN of the sent PDU;
- the sending module 22 is configured to send a first status report to the data receiving entity, where the first status report carries information about the SN.
- the data sending entity after transmitting the PDU to the data receiving entity, the data sending entity records the SN of the sent PDU, and sends a first status report carrying the information of the SN to the data receiving entity, and receives the data through the first status report.
- the entity may determine which PDUs are lost PDUs sent by the data sending entity but are not correctly received by the data receiving entity, and feed back the information of the SNs of the lost PDUs to the data sending entity, so that the data sending entity resends the PDUs, thereby enabling the data to Normal transmission.
- the sending module is specifically configured to send the first status report to the data receiving entity according to a preset sending period
- the first status report is sent to the data receiving entity when a preset condition is met.
- the preset conditions include:
- the number of PDUs sent by the data sending entity to the data receiving entity reaches N;
- the total number of bytes of the PDU sent by the data sending entity to the data receiving entity reaches M;
- M and N are integers not less than one.
- the first status report is an independent PDU, and the PDU of the first status report includes a PDU payload and a corresponding PDU header.
- the length of the PDU of the first status report is fixed;
- the length of the PDU of the first status report is not fixed, and the first status report includes information about the SN and an identifier corresponding to the information of the SN, and the identifier indicates whether there are other SNs after the information corresponding to the SN. Information.
- the content of the PDU payload includes:
- the information of the SNs of all the PDUs sent by the data transmitting entity between the time when the first status report was last sent and the time when the first status report is currently sent.
- the information of the SN in the first status report is the SN of all the PDUs sent by the data sending entity between the time when the first status report is sent last time and the time when the first status report is currently sent; or
- the SN of all the PDUs sent by the data sending entity is relative to the largest SN or the SN included in the first status report sent last time.
- the offset value of the previous SN is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is a value that is SN.
- the first status report is carried in a data PDU
- the first status report includes an SN of N PDUs sent by the data transmitting entity before the data PDU;
- the first status report includes an SN of N PDUs sent by the data transmitting entity after the data PDU.
- the first status report is carried in a data PDU
- the first status report includes an SN of the data PDU and an offset value of an SN of the N PDUs sent by the data transmitting entity with respect to the SN of the data PDU before the data PDU;
- the first status report includes an SN of the data PDU and an offset value of an SN of the N PDUs sent by the data transmitting entity with respect to the SN of the data PDU after the data PDU.
- the device further includes:
- the first receiving module 23 is configured to receive a second status report sent by the data receiving entity, where the second status report carries an SN of the lost PDU that is sent by the data sending entity but is not correctly received by the data receiving entity.
- Information ;
- the retransmission module 24 is configured to resend the lost PDU to the data receiving entity according to the information of the SN in the second status report.
- An embodiment of the present disclosure provides a data transmission method, which is applied to a data receiving entity in a 5G network. As shown in FIG. 3, the method includes:
- Step 301 Receive a first status report sent by a data sending entity, where the first status report carries information about an SN sent by the data sending entity to a PDU of the data receiving entity;
- Step 302 When it is determined that the PDU sent by the data sending entity is inconsistent with the PDU correctly received by the data receiving entity according to the information of the SN, send a second status report to the data sending entity, where the second status report is The information of the SN of the lost PDU that is sent by the data sending entity but is not correctly received by the data receiving entity is carried.
- the data sending entity after transmitting the PDU to the data receiving entity, the data sending entity records the SN of the sent PDU, and sends a first status report carrying the information of the SN to the data receiving entity, and receives the data through the first status report.
- the entity can determine which PDUs are sent by the data sending entity However, the data receiving entity does not correctly receive the lost PDU, and feeds back the information of the SN of the lost PDU to the data sending entity, so that the data sending entity resends the PDUs, so that the data can be transmitted normally.
- the method further includes:
- An embodiment of the present disclosure provides a data transmission apparatus, which is applied to a data receiving entity in a 5G network. As shown in FIG. 4, the apparatus includes:
- the second receiving module 41 is configured to receive a first status report sent by the data sending entity, where the first status report carries information about the SN of the PDU sent by the data sending entity to the data receiving entity;
- the feedback module 42 is configured to, when determining, according to the information of the SN, that the PDU sent by the data sending entity is inconsistent with the PDU correctly received by the data receiving entity, send a second status report to the data sending entity, where The second status report carries information about the SN of the lost PDU sent by the data sending entity but not correctly received by the data receiving entity.
- the data sending entity after transmitting the PDU to the data receiving entity, the data sending entity records the SN of the sent PDU, and sends a first status report carrying the information of the SN to the data receiving entity, and receives the data through the first status report.
- the entity may determine which PDUs are lost PDUs sent by the data sending entity but are not correctly received by the data receiving entity, and feed back information of the SNs of the lost PDUs to the data sending entity, so that the data sending entity resends the PDUs, so that the data can be normal. transmission.
- the device further includes:
- the submitting module 43 is configured to, when determining, according to the information of the SN, that the PDU sent by the data sending entity is consistent with the PDU correctly received by the data receiving entity, submit the correctly received data packet to the upper layer, where the data is received.
- the packet is obtained by the data receiving entity after processing the received PDU, and moves the lower boundary of the receiving window to the next SN of the SN that was last submitted to the upper layer.
- the NR system in the 5G network may adopt a single-layer SN, which is NR.
- the SN is allocated before ROHC (RObust Header Compression).
- ROHC RObust Header Compression
- Case 2 Split bearer, that is, packets transmitted by different legs are different SNs.
- the SN will be allocated at the highest level of the NR user plane.
- the SN numbers of the PDUs (protocol data units) transmitted through different legs are discontinuous.
- the data receiving entity receives the data sent by the data sending entity and performs the ARQ status report, it cannot determine whether a certain SN is lost in the transmission process or the data transmitting entity corresponding to the connection does not send the PDU corresponding to the SN at all. If the SN included in the ARQ status report is the SN of the PDU that the data transmitting entity does not send at all, the receiving window of the data receiving entity cannot move, the receiving window is stagnant, and the data cannot be transmitted normally.
- the present disclosure provides a data transmission method, which redefines a new transmission status report (ie, the first status report), and the data transmitting entity records the transmitted PDU after transmitting the PDU to the data receiving entity. And sending, by the SN, a transmission status report carrying the SN information, by which the data receiving entity can determine which PDUs are lost PDUs sent by the data sending entity but not correctly received by the data receiving entity, and the lost PDUs are The SN information is fed back to the data sending entity through the ARQ status report (ie, the second status report), so that the data sending entity resends the PDUs, so that the data can be transmitted normally.
- a transmission status report ie, the first status report
- the data transmission method in this embodiment specifically includes the following steps:
- Step 601 The data sending entity sends a PDU to the data receiving entity, and records the SN of the sent PDU;
- Step 602 The data sending entity sends the sending status to the data receiving entity through an independent PDU. Reporting, the sending status report carries information about the SN of the PDU sent by the data sending entity to the data receiving entity;
- the trigger condition for sending a status report may be, but is not limited to, a periodic trigger and an event trigger.
- the data sending entity sends a sending status report to the data receiving entity according to a preset time period.
- a timer may be set, and after the timer is finished, the data sending entity sends a sending status report to the data receiving entity.
- the length of the timer can be configured by signaling sent by the upper layer.
- the trigger condition can include but is not limited to:
- N is an integer greater than 0, and the value of N can be configured by the upper layer
- M is an integer greater than 0, and the value of M can be configured by the upper layer
- the independent status PDU of the transmission status report is sent by the data transmitting entity to the data receiving entity.
- the PDU that sends the status report contains two parts: the PDU payload and the corresponding PDU header.
- the length of the PDU that sends the status report may be fixed or unfixed.
- the PDU transmitting the status report includes a fixed number of SN or SN offset values.
- the transmission status report includes not only the SN or SN offset value, but also an identifier corresponding to the SN or SN offset value, and the identifier may be indicated by the identifier. Whether there are other SN or SN offset values after the SN or SN offset value.
- the content of the PDU payload of the transmission status report may be, but not limited to, the SN of all the PDUs sent by the data transmitting entity to the data receiving entity between the time when the transmission status report was last transmitted and the time when the current transmission status report is sent.
- the information that is, the information of all SNs between the next SN of the largest SN included in the last transmission status report and the SN corresponding to the current transmission status report transmission time.
- the representation of the information of the SN in the status report may be, but is not limited to, the following:
- All SN information in the transmission status report is identified by SN;
- the first SN information in the transmission status report is identified by the SN, and the other SN information is used in relation to the first An offset value of an SN or a previous SN is identified;
- each transmission status report can only contain a fixed number of SN information, such as 5.
- the information of each SN in the sending status report is identified by an offset value.
- the format of the sending status report is as shown in FIG. 7, where deltai identifies the offset value of the SN relative to its previous SN. , i takes values 1, 2, 3, 4, and 5.
- D/C and CPT form a PDU header.
- the D/C identifies whether the PDU is a transmission status report PDU or a data PDU.
- the CPT identifies the type of the control PDU. For example, if the CPT is defined as a special value, such as 111, the PDU corresponds to the PDU. status report.
- Step 603 The data receiving entity determines, according to the information of the SN in the received transmission status report, whether the PDU sent by the data sending entity is consistent with the PDU correctly received by the data receiving entity. If not, go to step 604; if yes, go to step 606;
- Step 604 When the PDU sent by the data sending entity is inconsistent with the PDU correctly received by the data receiving entity, the data receiving entity feeds back the ARQ status report to the data sending entity.
- the data receiving entity After receiving the transmission status report sent by the data sending entity, the data receiving entity determines, according to the information of the SN in the sending status report, the information of the SN that needs to be indicated in the ARQ status report, that is, only sent by the data sending entity but the data receiving entity is not correct.
- the received SN performs ARQ status report feedback, and does not perform ARQ status report feedback for the SN that the data sending entity does not send at all;
- Step 605 The data sending entity resends the PDU to the data receiving entity according to the information of the SN in the ARQ status report.
- Step 606 When the PDU sent by the data sending entity is consistent with the PDU correctly received by the data receiving entity, the data receiving entity submits the received data packet to the upper layer and moves the receiving window.
- the data receiving entity is considered to be continuously received, and the correctly received data packets are delivered to the upper layer, and the data receiving entity receives the PDU. Parse the PDU and remove the packet header to get the data packet, and move the lower boundary of the receiving window to the SN that was last submitted to the upper layer.
- the data sending entity after transmitting the PDU to the data receiving entity, the data sending entity records the SN of the sent PDU, and sends the information of the SN to the data receiving entity, so that the data receiving entity can determine which PDU is sent by the data sending entity but The data receiving entity does not correctly receive the lost PDUs, and feeds back the information of the SNs of the lost PDUs to the data sending entity, so that the data sending entity resends the PDUs, so that the data can be transmitted normally.
- the data transmission method in this embodiment specifically includes the following steps:
- Step 801 The data sending entity sends a PDU to the data receiving entity, and records the SN of the sent PDU.
- Step 802 The data sending entity carries a sending status report in the sent data PDU, where the sending status report carries information about the SN of the PDU sent by the data sending entity to the data receiving entity.
- the trigger condition for sending a status report may be, but is not limited to, a periodic trigger and an event trigger.
- the data sending entity sends a sending status report to the data receiving entity according to a preset time period.
- a timer may be set, and after the timer is finished, the data sending entity sends a sending status report to the data receiving entity.
- the length of the timer can be configured by signaling sent by the upper layer.
- the trigger condition can include but is not limited to:
- N is an integer greater than 0, and the value of N can be configured by the upper layer
- M is an integer greater than 0, and the value of M can be configured by the upper layer
- the representation of the information of the SN in the transmission status report may be, but is not limited to, an SN or SN offset value.
- the sending status report includes the SN of the N PDUs sent by the data sending entity before the data PDU (ie, the PDU carrying the status report); and/or the status report is sent.
- the SN of the N PDUs transmitted by the data transmitting entity after the data PDU is included.
- the SN of the data PDU ie, the PDU carrying the transmission status report
- the data PDU are included in the transmission status report.
- the offset value of the SN of the N PDUs sent by the data transmitting entity relative to the SN of the data PDU; and/or the transmission status report includes the SN of the data PDU and the N PDUs sent by the data transmitting entity after the data PDU
- the offset value of the SN relative to the SN of the data PDU is identified by the SN offset value.
- Step 803 The data receiving entity determines, according to the information of the SN in the received transmission status report, whether the PDU sent by the data sending entity is consistent with the PDU correctly received by the data receiving entity, if not, go to step 804; if yes, go to step 806;
- Step 804 When the PDU sent by the data sending entity is inconsistent with the PDU correctly received by the data receiving entity, the data receiving entity feeds back the ARQ status report to the data sending entity.
- the data receiving entity After receiving the transmission status report sent by the data sending entity, the data receiving entity determines, according to the information of the SN in the sending status report, the information of the SN that needs to be indicated in the ARQ status report, that is, only sent by the data sending entity but the data receiving entity is not correct.
- the received SN performs ARQ status report feedback, and does not perform ARQ status report feedback for the SN that the data sending entity does not send at all;
- Step 805 The data sending entity resends the PDU to the data receiving entity according to the information of the SN in the ARQ status report.
- Step 806 When the PDU sent by the data sending entity is consistent with the PDU correctly received by the data receiving entity, the data receiving entity submits the received PDU to the upper layer and moves the receiving window.
- the data receiving entity is considered to be continuously received, and the data receiving entity can submit the correctly received data packets to the upper layer, and the data receiving entity After receiving the PDU, the PDU is parsed and the packet header is removed to obtain the data packet, and the lower boundary of the receiving window is moved to the next SN of the SN that was recently submitted to the upper layer.
- the data sending entity after transmitting the PDU to the data receiving entity, the data sending entity records the SN of the sent PDU, and sends the information of the SN to the data receiving entity, so that the data receiving entity can determine which PDU is sent by the data sending entity but The data receiving entity does not correctly receive the lost PDUs, and feeds back the information of the SNs of the lost PDUs to the data sending entity, so that the data sending entity resends the PDUs, so that the data can be transmitted normally.
- the apparatus provided by the foregoing embodiment of the present disclosure is a device that can implement the data transmission method provided by the foregoing method embodiment, and all the embodiments based on the data transmission method provided by the foregoing method embodiments can be correspondingly applied to the foregoing. Device embodiments, and all can achieve the same or phase Similar benefits.
- the disclosed method and apparatus may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
- the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
- the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.
- FIG. 9 a block diagram of a computer system 900 suitable for use in implementing a data transfer method or data transfer device of an embodiment of the present disclosure is shown.
- computer system 900 includes a central processing unit (CPU) 901 that can be loaded into a program in random access memory (RAM) 903 according to a program stored in read only memory (ROM) 902 or from storage portion 908. And perform various appropriate actions and processes.
- RAM random access memory
- ROM read only memory
- various programs and data required for the operation of the system 900 are also stored.
- the CPU 901, the ROM 902, and the RAM 903 are connected to each other through a bus 904.
- An input/output (I/O) interface 905 is also coupled to bus 904.
- the following components are connected to the I/O interface 905: an input portion 906 including a keyboard, a mouse, etc.; an output portion 907 including a cathode ray tube (CRT), a liquid crystal display (LCD), and the like, and a speaker or the like; A storage portion 908 including a hard disk or the like; and a communication portion 909 including a network interface card such as a LAN card, a modem, and the like.
- the communication section 909 performs communication processing via a network such as the Internet.
- Driver 910 is also connected to I/O interface 905 as needed.
- a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory or the like is mounted on the drive 910 as needed so that a computer program read therefrom is installed into the storage portion 908 as needed.
- an embodiment of the present disclosure includes a computer program product comprising a computer program tangibly embodied on a machine readable medium, the computer program comprising program code for performing the method of the above flow chart.
- the computer program can be downloaded and installed from the network via the communication portion 909, and/or installed from the removable medium 911.
- each block of the flowchart or block diagrams can represent a module, a program segment, or a portion of code that includes one or more logic for implementing the specified.
- Functional executable instructions can also occur in a different order than that illustrated in the drawings. For example, two successively represented blocks may in fact be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending upon the functionality involved.
- each block of the block diagrams and/or flowcharts, and combinations of blocks in the block diagrams and/or flowcharts can be implemented in a dedicated hardware-based system that performs the specified function or operation. Or it can be implemented by a combination of dedicated hardware and computer instructions.
- the units or modules described in the embodiments of the present disclosure may be implemented by software or by hardware.
- the described unit or module can also be provided in the processor.
- the names of these units or modules do not in any way constitute a limitation on the unit or module itself.
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Abstract
Description
Claims (28)
- 一种数据传输方法,应用于5G网络中的数据发送实体,所述方法包括:在向数据接收实体发送PDU(协议数据单元)后,记录所发送的PDU的SN(序列号);以及向所述数据接收实体发送第一状态报告,所述第一状态报告中携带有所述SN的信息。
- 根据权利要求1所述的数据传输方法,其中,所述向所述数据接收实体发送第一状态报告包括:按照预设的发送周期向所述数据接收实体发送所述第一状态报告;或在满足预设条件时向所述数据接收实体发送所述第一状态报告。
- 根据权利要求2所述的数据传输方法,其中,所述预设条件包括:在上一次发送第一状态报告后,所述数据发送实体向数据接收实体发送PDU的数量达到N;或在上一次发送第一状态报告后,所述数据发送实体向数据接收实体发送PDU的总字节数达到M;或满足探询触发条件时;其中,M、N为不小于1的整数。
- 根据权利要求1所述的数据传输方法,其中,所述第一状态报告为独立的PDU,所述第一状态报告的PDU包括PDU净荷和对应的PDU头。
- 根据权利要求4所述的数据传输方法,其中,所述第一状态报告的PDU的长度是固定的;或所述第一状态报告的PDU的长度是不固定的,所述第一状态报告包括SN的信息以及与SN的信息一一对应的标识,所述标识指示对应SN的信息之后是否还存在其他SN的信息。
- 根据权利要求4所述的数据传输方法,其中,所述PDU净荷的内容包括:上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间, 所述数据发送实体发送的所有PDU的SN的信息。
- 根据权利要求6所述的数据传输方法,其中,所述第一状态报告中的SN的信息为上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU的SN;或上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU中一个PDU的SN以及其他PDU相对于该PDU的SN或该SN的前一个SN的偏移值;或上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU的SN相对于上一次发送的第一状态报告中包含的最大SN或者该SN的前一个SN的偏移值。
- 根据权利要求1所述的数据传输方法,其中,所述第一状态报告携带在数据PDU中,所述第一状态报告包括:在该数据PDU之前所述数据发送实体发送的N个PDU的SN;在该数据PDU之后所述数据发送实体发送的N个PDU的SN;或在该数据PDU之前和在该数据PDU之后所述数据发送实体发送的N个PDU的SN。
- 根据权利要求1所述的数据传输方法,其中,所述第一状态报告携带在数据PDU中,所述第一状态报告包括:该数据PDU的SN以及在该数据PDU之前所述数据发送实体发送的N个PDU的SN相对于该数据PDU的SN的偏移值;该数据PDU的SN以及在该数据PDU之后所述数据发送实体发送的N个PDU的SN相对于该数据PDU的SN的偏移值;或该数据PDU的SN以及在该数据PDU之前和在该数据PDU之后所述数据发送实体发送的N个PDU的SN相对于该数据PDU的SN的偏移值。
- 根据权利要求1-9中任一项所述的数据传输方法,其中,所述向所述数据接收实体发送第一状态报告之后,所述方法还包括:接收所述数据接收实体发送的第二状态报告,所述第二状态报告中携带有所述数据发送实体发送但所述数据接收实体未正确接收的丢失PDU的SN的信息;根据所述第二状态报告中SN的信息重新向所述数据接收实体发送所述丢失PDU。
- 一种数据传输方法,应用于5G网络中的数据接收实体,所述方法包括:接收数据发送实体发送的第一状态报告,所述第一状态报告中携带有所述数据发送实体发送至所述数据接收实体的PDU(协议数据单元)的SN(序列号)的信息;以及在根据所述SN的信息判断所述数据发送实体发送的PDU与所述数据接收实体正确接收的PDU不一致时,向所述数据发送实体发送第二状态报告,所述第二状态报告中携带有所述数据发送实体发送但所述数据接收实体未正确接收的丢失PDU的SN的信息。
- 根据权利要求11所述的数据传输方法,其中,所述方法还包括:在根据所述SN的信息判断所述数据发送实体发送的PDU与所述数据接收实体正确接收的PDU一致时,向高层递交正确接收到的顺序的数据包,所述数据包为所述数据接收实体对接收到的PDU进行处理后得到,并移动接收窗口的下边界到最近一次向高层递交的SN的下一个SN。
- 一种数据传输装置,应用于5G网络中的数据发送实体,所述装置包括:记录模块,用于在向数据接收实体发送PDU(协议数据单元)后,记录所发送的PDU的SN(序列号);以及发送模块,用于向所述数据接收实体发送第一状态报告,所述第一状态报告中携带有所述SN的信息。
- 根据权利要求13所述的数据传输装置,其中,所述发送模块具体用于按照预设的发送周期向所述数据接收实体发送所述第一状态报告;或在满足预设条件时向所述数据接收实体发送所述第一状态报告。
- 根据权利要求14所述的数据传输装置,其中,所述预设条件包括:在上一次发送第一状态报告后,所述数据发送实体向数据接收实体发送PDU的数量达到N;或在上一次发送第一状态报告后,所述数据发送实体向数据接收实体发送PDU的总字节数达到M;或满足探询触发条件时;其中,M、N为不小于1的整数。
- 根据权利要求13所述的数据传输装置,其中,所述第一状态报告为独立的PDU,所述第一状态报告的PDU包括PDU净荷和对应的PDU头。
- 根据权利要求16所述的数据传输装置,其中,所述第一状态报告的PDU的长度是固定的;或所述第一状态报告的PDU的长度是不固定的,所述第一状态报告包括SN的信息以及与SN的信息一一对应的标识,所述标识指示对应SN的信息之后是否还存在其他SN的信息。
- 根据权利要求16所述的数据传输装置,其中,所述PDU净荷的内容包括:上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU的SN的信息。
- 根据权利要求18所述的数据传输装置,其中,所述第一状态报告中的SN的信息为上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU的SN;或上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU中一个PDU的SN以及其他PDU相对于该PDU的SN或该SN的前一个SN的偏移值;或上一次发送第一状态报告的时刻到当前发送第一状态报告的时刻之间,所述数据发送实体发送的所有PDU的SN相对于上一次发送的第一状态报告中包含的最大SN或者该SN的前一个SN的偏移值。
- 根据权利要求13所述的数据传输装置,其中,所述第一状态报告携 带在数据PDU中,所述第一状态报告包括:在该数据PDU之前所述数据发送实体发送的N个PDU的SN;在该数据PDU之后所述数据发送实体发送的N个PDU的SN;或在该数据PDU之前和在该数据PDU之后所述数据发送实体发送的N个PDU的SN。
- 根据权利要求13所述的数据传输装置,其中,所述第一状态报告携带在数据PDU中,所述第一状态报告包括:该数据PDU的SN以及在该数据PDU之前所述数据发送实体发送的N个PDU的SN相对于该数据PDU的SN的偏移值;该数据PDU的SN以及在该数据PDU之后所述数据发送实体发送的N个PDU的SN相对于该数据PDU的SN的偏移值;或该数据PDU的SN以及在该数据PDU之前和在该数据PDU之后所述数据发送实体发送的N个PDU的SN相对于该数据PDU的SN的偏移值。
- 根据权利要求13-21中任一项所述的数据传输装置,其中,所述装置还包括:第一接收模块,用于接收所述数据接收实体发送的第二状态报告,所述第二状态报告中携带有所述数据发送实体发送但所述数据接收实体未正确接收的丢失PDU的SN的信息;重发模块,用于根据所述第二状态报告中SN的信息重新向所述数据接收实体发送所述丢失PDU。
- 一种数据传输装置,应用于5G网络中的数据接收实体,所述装置包括:第二接收模块,用于接收数据发送实体发送的第一状态报告,所述第一状态报告中携带有所述数据发送实体发送至所述数据接收实体的PDU的SN(序列号)的信息;以及反馈模块,用于在根据所述SN的信息判断所述数据发送实体发送的PDU与所述数据接收实体正确接收的PDU不一致时,向所述数据发送实体发送第 二状态报告,所述第二状态报告中携带有所述数据发送实体发送但所述数据接收实体未正确接收的丢失PDU的SN的信息。
- 根据权利要求23所述的数据传输装置,其中,所述装置还包括:递交模块,用于在根据所述SN的信息判断所述数据发送实体发送的PDU与所述数据接收实体正确接收的PDU一致时,向高层递交正确接收到的顺序的数据包,所述数据包为所述数据接收实体对接收到的PDU进行处理后得到,并移动接收窗口的下边界到最近一次向高层递交的SN的下一个SN。
- 一种数据传输装置,应用于5G网络中的数据发送实体并包括:处理器;以及收发机,用于在所述处理器的控制下接收和发送数据,所述处理器配置为执行以下操作:在向数据接收实体发送PDU(协议数据单元)后,记录所发送的PDU的SN(序列号);以及向所述数据接收实体发送第一状态报告,所述第一状态报告中携带有所述SN的信息。
- 一种数据传输装置,应用于5G网络中的数据接收实体并包括:处理器;以及收发机,用于在所述处理器的控制下接收和发送数据,所述处理器配置为执行以下操作:接收数据发送实体发送的第一状态报告,所述第一状态报告中携带有所述数据发送实体发送至所述数据接收实体的PDU(协议数据单元)的SN(序列号)的信息;以及在根据所述SN的信息判断所述数据发送实体发送的PDU与所述数据接收实体正确接收的PDU不一致时,向所述数据发送实体发送第二状态报告,所述第二状态报告中携带有所述数据发送实体发送但所述数据接收实体未正确接收的丢失PDU的SN的信息。
- 一种非易失性计算机可读存储媒介,所述计算机可读存储媒介存储有能够被处理器执行的计算机可读指令,当所述计算机可读指令被处理器执行时,所述处理器执行以下操作:在向数据接收实体发送PDU(协议数据单元)后,记录所发送的PDU的SN(序列号);以及向所述数据接收实体发送第一状态报告,所述第一状态报告中携带有所述SN的信息。
- 一种非易失性计算机可读存储媒介,所述计算机可读存储媒介存储有能够被处理器执行的计算机可读指令,当所述计算机可读指令被处理器执行时,所述处理器执行以下操作:接收数据发送实体发送的第一状态报告,所述第一状态报告中携带有所述数据发送实体发送至所述数据接收实体的PDU(协议数据单元)的SN(序列号)的信息;以及在根据所述SN的信息判断所述数据发送实体发送的PDU与所述数据接收实体正确接收的PDU不一致时,向所述数据发送实体发送第二状态报告,所述第二状态报告中携带有所述数据发送实体发送但所述数据接收实体未正确接收的丢失PDU的SN的信息。
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