WO2018201960A1 - Dispositif et procédé permettant de réaliser une rétroaction - Google Patents

Dispositif et procédé permettant de réaliser une rétroaction Download PDF

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Publication number
WO2018201960A1
WO2018201960A1 PCT/CN2018/084601 CN2018084601W WO2018201960A1 WO 2018201960 A1 WO2018201960 A1 WO 2018201960A1 CN 2018084601 W CN2018084601 W CN 2018084601W WO 2018201960 A1 WO2018201960 A1 WO 2018201960A1
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Prior art keywords
pdu
segment
lost
pdus
information
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Chinese (zh)
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刘佳敏
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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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
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and device for performing feedback.
  • the data transmission between the UE (User Equipment, User Equipment, also referred to as the terminal) and the eNB (Evolved Base Station) is usually through PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control), and radio link control. ), MAC (Medium Access Control) and PHY (Physical Layer) transmission, each layer completes different data processing.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical Layer
  • PDCP mainly performs security operations and header compression and decompression processing, such as encryption and integrity protection, ROHC (RObust Header Compression) compression and decompression, etc.
  • RLC mainly completes segmentation and sequential delivery of data.
  • ARQ Automatic Repeat reQuest
  • MAC mainly completes scheduling and cascade processing of different logical channels and HARQ (Hybrid Automatic Repeat reQuest) operation
  • physical layer completes the transmission block into Packets and air ports are sent.
  • the RLC layer supports three modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM).
  • TM Transparent Mode
  • UM Unacknowledged Mode
  • AM Acknowledged Mode
  • the RLC SDUs Service Data Units
  • RLC PDU Service Data Units
  • the RLC PDU Service Data Unit
  • the RLC PDU Protocol Data Unit
  • the RLC organizes several RLC PDUs and necessary RLC PDU segments according to the size of the transmission resources, sends them to the MAC, performs group packets and transmits them.
  • the mandatory ACK_SN (ACK: ACKnowledge, SN: Sequence Number) information is required to indicate the SN number of the highest PDU that can currently confirm the receiving status.
  • NACK_SN NACK: Negative ACKnowledge
  • possible segmentation information are also carried in the same status report to indicate which PDU or PDU segment is lost and needs to be retransmitted.
  • the RLC guarantees the success rate of the higher data transmission through the status report feedback and the retransmission mechanism, and meets the requirements of the QoS (Quality of Service).
  • the RLC status report can only carry a single granularity of PDU SN information when transmitting.
  • the number of PDUs sent at a time will be relatively large.
  • a number of consecutive PDUs will be simultaneously lost.
  • the SNs of several consecutive PDUs are carried one by one. This method is inefficient. The waste of transmission resources is not conducive to the improvement of air interface efficiency and processing efficiency.
  • the present invention provides a method and a device for performing feedback to solve the problem that if multiple consecutive PDUs are simultaneously lost in the prior art, the RLC status report includes the SN of the lost packet, thereby causing low efficiency and wasteful transmission. Resources are not conducive to the problem of air interface efficiency and processing efficiency.
  • the receiving device determines the continuous loss feedback information corresponding to the lost PDU, where the continuous loss feedback information includes the SN of at least one PDU, and does not include the SN of all the PDUs in the lost PDU. ;
  • the receiving device sends a status report of the continuous loss feedback information corresponding to the at least one segment lost PDU to the sending device, so that the sending device determines the PDU lost in the corresponding segment according to the continuous loss feedback information.
  • the sending device receives a status report from the receiving device that includes continuous loss feedback information corresponding to at least one segment lost PDU, where the continuous loss feedback information includes an SN of at least one PDU, and does not include all PDUs in the lost PDU SN;
  • the transmitting device determines at least one segment lost PDU according to the continuous loss feedback information.
  • a receiving device for performing feedback according to an embodiment of the present invention includes:
  • An information determining module configured to determine continuous loss feedback information corresponding to the lost PDU for any piece of lost PDU, where the continuous loss feedback information includes an SN of at least one PDU, and does not include the lost PDU in the segment SN of all PDUs;
  • a sending module configured to send, to the sending device, a status report that includes continuous loss feedback information corresponding to the at least one segment lost PDU, so that the sending device determines, according to the continuous loss feedback information, the corresponding segment lost PDU.
  • a sending device for performing feedback according to an embodiment of the present invention where the sending device includes:
  • a receiving module configured to receive a status report from the receiving device that includes continuous loss feedback information corresponding to at least one segment lost PDU, where the continuous loss feedback information includes an SN of at least one PDU, and does not include the lost PDU SN of all PDUs;
  • a processing module configured to determine, according to the continuous loss feedback information, at least one segment lost PDU.
  • a transceiver for receiving and transmitting data under the control of a processor.
  • a transceiver for receiving and transmitting data under the control of a processor.
  • the receiving device determines the continuous loss feedback information corresponding to a lost PDU, and sends a status report including the continuous loss feedback information to the sending device, where the continuous loss feedback information includes the SN of at least one PDU, and does not The SN of all PDUs in the lost PDU is included. Since the continuous loss feedback information does not include the SNs of all the PDUs in the lost PDU, thereby simultaneously dropping packets in multiple consecutive PDUs, the overhead of the RLC status report is saved, thereby improving efficiency and saving transmission resources.
  • FIG. 1 is a schematic structural diagram of a system for performing feedback according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a first type of packet loss according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a second type of packet loss according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a first status report format according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a second status report format according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a second status report format according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a first receiving device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a first sending device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a second receiving device according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a second sending device according to an embodiment of the present invention.
  • FIG. 11 is a schematic flowchart of a method for performing feedback according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a second method for performing feedback according to an embodiment of the present invention.
  • the system for performing feedback in the embodiment of the present invention includes: a receiving device 10 and a transmitting device 20.
  • the receiving device 10 is configured to determine continuous loss feedback information corresponding to the lost PDU for any piece of the lost PDU, where the continuous loss feedback information includes the SN of the at least one PDU, and does not include the lost PDU.
  • the SN of all the PDUs is sent to the sending device, where the status report of the continuous loss feedback information corresponding to the at least one segment lost PDU is sent, so that the sending device determines the PDU with the corresponding segment loss according to the continuous loss feedback information;
  • the sending device 20 is configured to receive a status report from the receiving device that includes continuous loss feedback information corresponding to at least one segment lost PDU, and determine at least one segment lost PDU according to the continuous loss feedback information.
  • the receiving device determines the continuous loss feedback information corresponding to a lost PDU, and sends a status report including the continuous loss feedback information to the sending device, where the continuous loss feedback information includes the SN of at least one PDU, and does not The SN of all PDUs in the lost PDU is included. Since the continuous loss feedback information does not include the SNs of all the PDUs in the lost PDU, thereby simultaneously dropping packets in multiple consecutive PDUs, the overhead of the RLC status report is saved, thereby improving efficiency and saving transmission resources; further improving Air interface efficiency and processing efficiency.
  • the continuous loss feedback information includes an SN of a part of the PDUs in the lost PDU;
  • the continuous lost feedback information does not have the SN of any one of the PDUs in the lost PDU.
  • the continuous loss feedback information in the embodiment of the present invention includes information that enables the sending device to determine a lost PDU.
  • the SN of one PDU and the number of PDUs lost in the corresponding segment may be included;
  • An SN including two PDUs in the continuous loss feedback information may also be included.
  • the continuous loss feedback information includes different information, and the specific information has different meanings. Several are listed below.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU.
  • the SN of a lost PDU is 10 to 15, the SN of the first PDU, that is, 10, is continuously lost in the feedback information.
  • the number of lost PDUs is 6 if the SN of the first PDU is included, and 5 if the SN of the first PDU is not included.
  • the specific inclusion or not includes the agreement in the agreement, and can also be determined by both the sending and receiving parties. As long as the sender and receiver can be guaranteed to be consistent.
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU.
  • the SN of a lost PDU is 10 to 15
  • the SN of the first PDU that is, 15 is included in the continuous loss feedback information.
  • the number of lost PDUs is 6 if the SN of the first PDU is included, and 5 if the SN of the first PDU is not included.
  • the specific inclusion or not includes the agreement in the agreement, and can also be determined by both the sending and receiving parties. As long as the sender and receiver can be guaranteed to be consistent.
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of one PDU included in the continuous loss feedback information is the SN of the first PDU located before the first PDU, that is, 9.
  • the number of lost PDUs is 6.
  • the number of PDUs lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of one PDU included in the continuous loss feedback information is the SN of the first PDU located after the last PDU, that is, 16.
  • the number of lost PDUs is 6.
  • the continuous loss feedback information includes an SN including two PDUs in the continuous loss feedback information.
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment.
  • the SN of a lost PDU is 10 to 15
  • the SN of the first PDU and the SN of the last PDU, that is, 10 and 15 are included in the continuous loss feedback information.
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment.
  • the continuous loss feedback information includes the SN of the first PDU located before the first PDU and the SNs of the last PDU, that is, 9 and 15.
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment.
  • the continuous loss feedback information includes the SN of the first PDU and the SNs of the first PDU behind the last PDU, that is, 10 and 16.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the PDU that is located in front of the PDU that is adjacent to the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment. .
  • the continuous loss feedback information includes the first one before the first PDU and the first one after the last PDU, that is, 9 and 16.
  • the lost PDU is a complete PDU.
  • the first and/or last PDU in a continuously lost PDU is a segmentation PDU.
  • the segmentation PDU is a part of the correctly received, part of the lost PDU.
  • the last one of consecutively lost PDUs is a segmentation PDU, the first N bytes in the last PDU are lost.
  • the continuous loss feedback information may include segment offset information corresponding to the segment PDU, in addition to the information included in the foregoing, so that the sending device is configured according to The segment offset information determines the missing bytes in the segmentation PDU.
  • the segment offset information includes a lot of content, and several are listed below.
  • the segment offset information includes information used to determine the received success byte in the first PDU or used to determine the first PDU. Missing byte information.
  • the first PDU has a total of 500 bytes and is lost 200 bytes. If the segment offset information includes information for determining a success byte received in the first PDU, the information is 300; if the segment offset information includes information for determining a missing byte in the first PDU, the information Is 200.
  • Which method is specifically adopted may be agreed in the agreement, or may be determined by both the sending and receiving parties. As long as the sender and receiver can be guaranteed to be consistent.
  • the segment offset information includes information for determining the success byte received in the last PDU or used to determine the missing byte in the last PDU. Information.
  • the last PDU has a total of 500 bytes and is lost 200 bytes. If the segment offset information includes information for determining a success byte received in the last PDU, the information is 300; if the segment offset information includes information for determining a missing byte in the last PDU, the information is 200. .
  • Which method is specifically adopted may be agreed in the agreement, or may be determined by both the sending and receiving parties. As long as the sender and receiver can be guaranteed to be consistent.
  • the segment offset information includes information used to determine the received success byte in the first PDU or used to determine the The information of the missing bytes in a PDU, as well as information for determining the success byte received in the last PDU or for determining the missing byte in the last PDU.
  • the first PDU has a total of 600 bytes, 200 bytes after the loss
  • the last PDU has a total of 500 bytes, and 200 bytes after the loss.
  • the segment offset information includes information for determining a success byte received in the first PDU, the information is 400; if the segment offset information includes information for determining a missing byte in the first PDU, the information 200; if the segment offset information includes information for determining a success byte received in the last PDU, the information is 300; if the segment offset information includes information for determining a missing byte in the last PDU, The information is 200.
  • Which method is specifically adopted may be agreed in the agreement, or may be determined by both the sending and receiving parties. As long as the sender and receiver can be guaranteed to be consistent.
  • the continuous loss feedback information may also include, but is not limited to, some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • a dedicated segmentation indicator field can be set.
  • the logic here consists of three ways:
  • the first segment may use a 1-bit segment indication field separately;
  • the last segment can use the 1-bit segment indication field separately;
  • the first and last segments may jointly use a segment indication field, such as 1 bit. It can also be 2bit, indicating whether it is a segment, and indicating which segment is segmented, such as 00 for no segmentation, 10 for segmentation, 01 for segmentation, 11 for first and last segment It is all segmentation.
  • Embodiment 1 NACK_SN+Num (that is, including the number of one SN and PDU).
  • the receiving state of the receiving device is: the SN of the last received PDU is 38, and 15 consecutive PDUs of the SN within the range of [12, 26] are lost, and the others are normally received.
  • the transmitting device may transmit consecutive 12 PDUs of data packet SN from 0 to 11 at the first transmission moment, and 15 consecutive PDUs of data packet SN from 12 to 26 at the second transmission moment. A consecutive 12 PDUs of data packets SN from 27 to 38 are transmitted at the third transmission time.
  • the receiving device For the receiving device, the first 12 PDUs of the SN from 0 to 11 are received first, and then 12 consecutive PDUs of the SN from 27 to 38 are received, and the receiving sequence gap is found in the middle, that is, the reordering timer is started,
  • the length of the sorting timer is approximately equal to the maximum transmission delay of the HARQ.
  • ACK_SN which may be the highest SN information of the PDU that can currently determine the receiving state or the information of the next SN of the highest SN.
  • NACK_SN sequence information ie, NACK_SN+Num
  • NACK_SN set to 26
  • Embodiment 2 First_NACK_SN+Last_NACK_SN (ie including two SNs)
  • the receiving state of the receiving device is: the SN of the last received PDU is 38, and 15 consecutive PDUs of the SN within the range of [12, 26] are lost, and the others are normally received.
  • the transmitting device may transmit consecutive 12 PDUs of data packet SN from 0 to 11 at the first transmission moment, and 15 consecutive PDUs of data packet SN from 12 to 26 at the second transmission moment. A consecutive 12 PDUs of data packets SN from 27 to 38 are transmitted at the third transmission time.
  • the receiving device For the receiving device, the first 12 PDUs of the SN from 0 to 11 are received first, and then 12 consecutive PDUs of the SN from 27 to 38 are received, and the receiving sequence gap is found in the middle, that is, the reordering timer is started,
  • the length of the sorting timer is approximately equal to the maximum transmission delay of the HARQ.
  • ACK_SN which may be the highest SN information of the PDU that can currently determine the receiving state or the information of the next SN of the highest SN.
  • NACK_SN sequence information ie, First_NACK_SN+Last_NACK_SN
  • First_NACK_SN can be set to 12
  • Last_NACK_SN is set to 26
  • the missing SN range can be determined by these two values to be [12, 26], and a total of 15 consecutive PDUs are lost.
  • the square brackets represent numbers including edges, and the parentheses represent numbers that do not contain edges. Corresponding to the physical meaning, it may be the previous SN of continuous packet loss, or the next SN of consecutive packet loss. As long as the standard is defined so that the two ends understand the same, and the simple addition or subtraction of 1 operation, there will be no misunderstanding, but the representation is different, and the information carried is consistent.
  • the acknowledgment status of each PDU can be marked accordingly, and the sending window can be moved. For example, the lower boundary of the sending window can be updated from 0 to 12. , 12 is the first PDU that does not continuously receive an ACK.
  • Embodiment 3 Instruction of a segmentation package
  • the complete PDU reception or loss is given.
  • it is the processing mode when the segmentation PDU needs to display its reception state.
  • the receiving state of the receiving device is: the SN of the last received PDU is 38, and the transmitting device transmits the first 12 consecutive complete PDUs of the data packet SN from 0 to 12 and the SN at the first transmission moment.
  • the first 250 bytes are sent at the third transmission time.
  • the receiving device For the receiving device, the first 13 PDUs and PDU segments of the SN from 0 to 12 are received first, and then 13 consecutive PDUs and PDU segments of the SN from 26 to 38 are received, and a reception sequence gap exists in the middle. That is, the reordering timer is started, and the reordering timer length is approximately equal to the maximum transmission delay of the HARQ, and when the reordering timer expires, 15 PDUs and PDU segments at the gap are still not received, and the 15 PDUs are identified. If the PDU segment is lost, the status report needs to be sent back to the sending device to inform the 15 PDUs and the PDU segment is lost. The device needs to be retransmitted.
  • ACK_SN which may be the highest SN information of the PDU that can currently determine the receiving state or the information of the next SN of the highest SN.
  • segmentation packet For the first NACK PDU, whether it is a segmentation packet can display an indication. When it is indicated that it is a segmentation packet, it may carry segmented SO (Segment Offset) information.
  • segmented SO Segment Offset
  • a general segmentation package requires two SO information, SOstart and SOend, or SOstart and break length.
  • N consecutive PDUs and segments are lost, the last one being a fragmented packet, and the rest being a complete PDU;
  • D/C indicates that this is a control PDU; the PDU type field can indicate that this is a Status report.
  • D/C is a type indication to indicate whether the PDU is a data PDU or a control PDU.
  • the PDU type is a type indication of the control PDU, and may indicate a status report or other control PDU format.
  • ACK_SN is the highest SN capable of confirming the reception status, or the next SN of the highest SN; the size of this field is determined by the length of the SN used by the RLC entity. For example, if a SN of 12 bits or 18 bits is used, the corresponding length of the ACK_SN is consistent with the SN length.
  • En It can be 1 bit length to indicate whether the NACK_SN related information is followed. For example, 0 indicates that the status report ends, and 1 indicates that there is NACK_SN related information.
  • NACK_SN may be the SN of a single lost PDU; may also be the SN information of the first and/or last PDU of consecutively lost PDUs; or may be the SN and / of the first one of consecutively lost PDUs Or the last SN of the last one, such as Embodiment 2 above.
  • Ec Can be 1 bit length, indicating whether it is a single PDU or a continuous PDU loss information, for example, 0 is a single PDU loss information, and 1 is a continuous PDU loss information.
  • Es1 It can be 1 bit length, indicating whether the lost PDU is a segment. If it is a single lost PDU, the information is sufficient. For example, 0 is a complete PDU loss, meaning that there will be no SO information in the future, and 1 is a segment PDU loss. , meaning that there will be SOstart and SOend in the future; if there are consecutive PDUs lost, the domain has two usages:
  • Es1 only needs this field to indicate whether the consecutive PDUs contain segmentation information, that is, the first PDU and the last PDU are not distinguished, and the 1bit indication is used uniformly. When the bit is 0, the first PDU and the last PDU are not segmented; when the bit is taken to be 1, the first PDU and/or the last PDU are segmented. There are three cases: Only the first one is a segmentation PDU, only the last one is a segmentation PDU, the first and last one are simultaneously segmentation PDUs.
  • SOstart corresponds to the position of the segment of the first PDU in the original complete PDU
  • the format can be changed to the format shown in Figure 5:
  • Es1 field as an indication of whether the first PDU is fragmented, that is, when the Ec field shows that this is a format in which consecutive PDUs are lost, then the Es1 field only indicates whether the subsequent SOstart is present, and whether the last PDU is segmented. Indicated by another Es2 field, that is, whether SOend appears or not is indicated by Es2.
  • NACK_NUM The number of consecutively lost PDUs, together with the NACK_SN field, determines the range of SNs of consecutively lost PDUs, or this field can also be changed to Last_NACK_SN, which is the first and last SN values of the SN of consecutively lost PDUs, respectively. This field only appears when Ec shows that this is a continuous loss of PDU format, and does not appear in the case of a single loss.
  • Es2 Used in conjunction with Es1, in case Ec indicates that this is a continuous loss PDU format, it is used to indicate whether the last PDU is segmented, or in the case of no optimization, only Es1 one domain is required.
  • SOstart indicates the starting byte number of the PDU segment in the original full PDU in the case of a single PDU segment loss; in the format of the consecutive PDU, the segment indicating the first PDU is in the original full PDU
  • the number of starting bytes in the first PDU segment must be the last segment, so the first PDU can omit SOend, the default to the end, of course, can also show that carrying SOend, equivalent to losing in consecutive PDUs
  • SOend indicates the number of ending bytes of the PDU segment in the original full PDU in the case of a single PDU segment loss; in the format of the consecutive PDU, the segment indicating the last PDU is in the original full PDU The starting byte count, because the last PDU segment must be the first segment, so the last PDU can omit SOstart, starting with 0 bytes by default.
  • a serially lost packet 26 is the last packet, and 26 is segmented, then the first segment of 26 that is included in the continuous SN (0-250 bytes) One segment).
  • starting from 0 bytes is the first segment; starting from the middle byte and not ending, is the intermediate segment; starting from the middle byte and ending at the end of the segment coincides with the end of the PDU, is the last one Segmentation.
  • the status report contains only ACK information, and there is no packet loss information, the status report only needs to include ACK_SN information, and the following En field is set to 0, which means that the status report ends, and there is no NACK information subsequently.
  • the status report contains ACK information, and there is a single PDU or segmented packet loss information, as well as continuous PDU or segmented packet loss information, each time the En field is set to 1, the subsequent NACK information can carry a single
  • the packet may also be a continuous packet, and the segmentation information is indicated by each, and the different information is carried one by one and the corresponding indication domain is set, until all are carried, and the following En domain is set to 0, meaning the status report End.
  • the first receiving device of the embodiment of the present invention includes:
  • the information determining module 700 is configured to determine continuous loss feedback information corresponding to the lost PDU for any piece of lost PDU, where the continuous loss feedback information includes an SN of at least one PDU, and does not include the lost PDU. SN of all PDUs;
  • the sending module 701 is configured to send a status report of the continuous loss feedback information corresponding to the at least one segment lost PDU to the sending device, so that the sending device determines the PDU with the corresponding segment loss according to the continuous loss feedback information.
  • the continuous loss feedback information includes the SN of one PDU and the number of PDUs lost in the corresponding segment; or
  • the SN of the two PDUs is included in the continuous loss feedback information.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU;
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment;
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SNs of the PDUs located in front of the PDUs adjacent to the PDUs that are lost in the corresponding segment, and the SNs of the PDUs that are located later and adjacent to the PDUs that are lost in the corresponding segment.
  • the continuous loss feedback information further includes segment segment information corresponding to the segment PDU, so that the sending device determines that the segment PDU is lost according to the segment offset information. byte.
  • the segment offset information includes information used to determine the received success byte in the first PDU or is used to determine the first PDU. Information about missing bytes in the PDU; or,
  • the segment offset information includes information for determining a success byte in the last PDU or information for determining a missing byte in the last PDU. ;or,
  • the segment offset information includes information for determining a success byte in the first PDU or is used to determine the first one.
  • the continuous loss feedback information further includes some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • the status report further includes information used to indicate whether the continuous loss feedback information is included in the status report.
  • the first sending device of the embodiment of the present invention includes:
  • the receiving module 800 is configured to receive, by the receiving device, a status report that includes continuous loss feedback information corresponding to at least one segment lost PDU, where the continuous loss feedback information includes an SN of at least one PDU, and does not include the segment lost SN of all PDUs in the PDU;
  • the processing module 801 is configured to determine, according to the continuous loss feedback information, at least one segment lost PDU.
  • the continuous loss feedback information includes the SN of one PDU and the number of PDUs lost in the corresponding segment; or
  • the SN of the two PDUs is included in the continuous loss feedback information.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU;
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment;
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SNs of the PDUs located in front of the PDUs adjacent to the PDUs that are lost in the corresponding segment, and the SNs of the PDUs that are located later and adjacent to the PDUs that are lost in the corresponding segment.
  • the continuous loss feedback information further includes segment segment information corresponding to the segment PDU, so that the sending device determines that the segment PDU is lost according to the segment offset information. byte.
  • the segment offset information includes information used to determine the received success byte in the first PDU or is used to determine the first PDU. Information about missing bytes in the PDU; or,
  • the segment offset information includes information for determining a success byte in the last PDU or information for determining a missing byte in the last PDU. ;or,
  • the segment offset information includes information for determining a success byte in the first PDU or is used to determine the first one.
  • the continuous loss feedback information further includes some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • the status report further includes information used to indicate whether the continuous loss feedback information is included in the status report.
  • the second receiving device of the embodiment of the present invention includes:
  • the processor 901 is configured to send and receive data through the transceiver 902, and read the program in the memory 904, and perform the following process:
  • a status report including continuous loss feedback information corresponding to the at least one segment lost PDU is sent to the transmitting device, so that the sending device determines the PDU with the corresponding segment loss according to the continuous loss feedback information.
  • the transceiver 902 is configured to receive and transmit data under the control of the processor 901.
  • the continuous loss feedback information includes the SN of one PDU and the number of PDUs lost in the corresponding segment; or
  • the SN of the two PDUs is included in the continuous loss feedback information.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU;
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment;
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SNs of the PDUs located in front of the PDUs adjacent to the PDUs that are lost in the corresponding segment, and the SNs of the PDUs that are located later and adjacent to the PDUs that are lost in the corresponding segment.
  • the continuous loss feedback information further includes segment segment information corresponding to the segment PDU, so that the sending device determines that the segment PDU is lost according to the segment offset information. byte.
  • the segment offset information includes information used to determine the received success byte in the first PDU or is used to determine the first PDU. Information about missing bytes in the PDU; or,
  • the segment offset information includes information for determining a success byte in the last PDU or information for determining a missing byte in the last PDU. ;or,
  • the segment offset information includes information for determining a success byte in the first PDU or is used to determine the first one.
  • the continuous loss feedback information further includes some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • the status report further includes information used to indicate whether the continuous loss feedback information is included in the status report.
  • the interaction between the processor 901 and the terminal is performed by the transceiver 902.
  • bus 900 can include any number of interconnected buses and bridges, and bus 900 will include one or more processors represented by processor 901 and memory represented by memory 904. The various circuits are linked together. The bus 900 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 903 provides an interface between bus 900 and transceiver 902.
  • Transceiver 902 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the processor 901 is transmitted over the wireless medium via the antenna 905. Further, the antenna 905 also receives the data and transmits the data to the processor 901.
  • the processor 901 is responsible for managing the bus 900 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 904 can be used to store data used by the processor 901 in performing operations.
  • the processor 901 may be a CPU (Central Embedded Device), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device). , complex programmable logic devices).
  • CPU Central Embedded Device
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the second sending device of the embodiment of the present invention includes:
  • the processor 1001 is configured to send and receive data through the transceiver 1002, and read the program in the memory 1004, and perform the following process:
  • the transceiver 1002 is configured to receive and transmit data under the control of the processor 1001.
  • the continuous loss feedback information includes the SN of one PDU and the number of PDUs lost in the corresponding segment; or
  • the SN of the two PDUs is included in the continuous loss feedback information.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU;
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU;
  • the number of PDUs that are lost in the corresponding segment includes all PDUs that are lost in the corresponding segment;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment;
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SNs of the PDUs located in front of the PDUs adjacent to the PDUs that are lost in the corresponding segment, and the SNs of the PDUs that are located later and adjacent to the PDUs that are lost in the corresponding segment.
  • the continuous loss feedback information further includes segment segment information corresponding to the segment PDU, so that the sending device determines that the segment PDU is lost according to the segment offset information. byte.
  • the segment offset information includes information used to determine the received success byte in the first PDU or is used to determine the first PDU. Information about missing bytes in the PDU; or,
  • the segment offset information includes information for determining a success byte in the last PDU or information for determining a missing byte in the last PDU. ;or,
  • the segment offset information includes information for determining a success byte in the first PDU or is used to determine the first one.
  • the continuous loss feedback information further includes some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • the status report further includes information used to indicate whether the continuous loss feedback information is included in the status report.
  • the interaction between the processor 1001 and the terminal is performed by the transceiver 1002.
  • bus 1000 may include any number of interconnected buses and bridges, and bus 1000 will include one or more processors represented by processor 1001 and memory represented by memory 1004. The various circuits are linked together. The bus 1000 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 1003 provides an interface between bus 1000 and transceiver 1002.
  • the transceiver 1002 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the processor 1001 is transmitted over the wireless medium via the antenna 1005. Further, the antenna 1005 also receives the data and transmits the data to the processor 1001.
  • the processor 1001 is responsible for managing the bus 1000 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 1004 can be used to store data used by the processor 1001 in performing operations.
  • the processor 1001 may be a CPU, an ASIC, an FPGA, or a CPLD.
  • a method for performing feedback is provided in the embodiment of the present invention.
  • the device corresponding to the method is a device in the system that is fed back by the embodiment of the present invention, and the principle of the method for solving the problem is similar to the system. Therefore, the implementation of the method can be referred to the implementation of the system, and the repeated description will not be repeated.
  • the first method for performing feedback in the embodiment of the present invention includes:
  • Step 1100 For any PDU that is lost, the receiving device determines continuous loss feedback information corresponding to the lost PDU, where the continuous loss feedback information includes the SN of at least one PDU, and does not include all the lost PDUs. SN of the PDU;
  • Step 1101 The receiving device sends a status report of the continuous loss feedback information corresponding to the at least one segment lost PDU to the sending device, so that the sending device determines the PDU with the corresponding segment loss according to the continuous loss feedback information.
  • the continuous loss feedback information includes the SN of one PDU and the number of PDUs lost in the corresponding segment; or
  • the SN of the two PDUs is included in the continuous loss feedback information.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU;
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment;
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SNs of the PDUs located in front of the PDUs adjacent to the PDUs that are lost in the corresponding segment, and the SNs of the PDUs that are located later and adjacent to the PDUs that are lost in the corresponding segment.
  • the continuous loss feedback information further includes segment segment information corresponding to the segment PDU, so that the sending device determines that the segment PDU is lost according to the segment offset information. byte.
  • the segment offset information includes information used to determine the received success byte in the first PDU or is used to determine the first PDU. Information about missing bytes in the PDU; or,
  • the segment offset information includes information for determining a success byte in the last PDU or information for determining a missing byte in the last PDU. ;or,
  • the segment offset information includes information for determining a success byte in the first PDU or is used to determine the first one.
  • the continuous loss feedback information further includes some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • the status report further includes information used to indicate whether the continuous loss feedback information is included in the status report.
  • the embodiment of the present invention also protects a memory that stores a program for performing the method of feedback in FIG. 11 of the embodiment of the present invention. After the memory is connected to other devices, the program in the memory can be executed by processing in other devices, thereby implementing the solution of the embodiment of the present invention.
  • the memory is a U disk, a mobile hard disk, etc., and can be connected through an external interface; for example, the memory is a storage module in other devices, and can be connected through an internal interface.
  • the second method for performing feedback in the embodiment of the present invention includes:
  • Step 1200 The sending device receives, by the receiving device, a status report of continuous loss feedback information corresponding to the at least one segment lost PDU, where the continuous loss feedback information includes an SN of at least one PDU, and does not include the lost PDU. SN of all PDUs;
  • Step 1201 The sending device determines, according to the continuous loss feedback information, at least one segment lost PDU.
  • the continuous loss feedback information includes the SN of one PDU and the number of PDUs lost in the corresponding segment; or
  • the SN of the two PDUs is included in the continuous loss feedback information.
  • the number of PDUs lost in the corresponding segment includes the first PDU or does not include the first PDU;
  • the number of PDUs lost in the corresponding segment includes the last PDU or does not include the last PDU;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment;
  • the number of PDUs that are lost in the corresponding segment includes all the PDUs that are lost in the corresponding segment.
  • the SN of the two PDUs included in the continuous loss feedback information is the SN of the first PDU and the SN of the last PDU in the PDU that is lost in the corresponding segment;
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the PDU and the SN of the last PDU that are located in front of the PDU that is adjacent to the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SN of the first PDU in the PDU that is lost in the corresponding segment, and the SN of the PDU that is located later and adjacent to the PDU that is lost in the corresponding segment; or
  • the SNs of the two PDUs included in the continuous loss feedback information are the SNs of the PDUs located in front of the PDUs adjacent to the PDUs that are lost in the corresponding segment, and the SNs of the PDUs that are located later and adjacent to the PDUs that are lost in the corresponding segment.
  • the continuous loss feedback information further includes segment segment information corresponding to the segment PDU, so that the sending device determines that the segment PDU is lost according to the segment offset information. byte.
  • the segment offset information includes information used to determine the received success byte in the first PDU or is used to determine the first PDU. Information about missing bytes in the PDU; or,
  • the segment offset information includes information for determining a success byte in the last PDU or information for determining a missing byte in the last PDU. ;or,
  • the segment offset information includes information for determining a success byte in the first PDU or is used to determine the first one.
  • the continuous loss feedback information further includes some or all of the following information:
  • the information indicating whether the first PDU in the PDU that is lost in the corresponding segment is a segmentation PDU is located in a segment indication field of the status report;
  • the information indicating whether the last PDU in the PDU lost in the corresponding segment is a segment PDU is located in a segment indication field of the status report; or
  • the information indicating whether there is a segment PDU in the first PDU and the last PDU in the PDU in which the corresponding segment is lost is located in the segment indication field of the status report.
  • the status report further includes information used to indicate whether the continuous loss feedback information is included in the status report.
  • the embodiment of the present invention also protects a memory that stores a program for performing the method of feedback in FIG. 12 of the embodiment of the present invention. After the memory is connected to other devices, the program in the memory can be executed by processing in other devices, thereby implementing the solution of the embodiment of the present invention.
  • the memory is a U disk, a mobile hard disk, etc., and can be connected through an external interface; for example, the memory is a storage module in other devices, and can be connected through an internal interface.
  • the application can also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the application can take the form of a computer program product on a computer usable or computer readable storage medium having computer usable or computer readable program code embodied in a medium for use by an instruction execution system or Used in conjunction with the instruction execution system.
  • a computer usable or computer readable medium can be any medium that can contain, store, communicate, communicate, or transport a program for use by an instruction execution system, apparatus or device, or in conjunction with an instruction execution system, Used by the device or device.

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  • Signal Processing (AREA)
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Abstract

La présente invention concerne un dispositif et un procédé permettant de réaliser une rétroaction, destinés à résoudre le problème existant dans l'état de la technique selon lequel, si une pluralité de PDU continues subissent simultanément une perte de paquets, un rapport d'état de RLC comprend des SN des PDU à perte de paquets, ce qui entraine une efficacité relativement faible, gaspille des ressources de transmission et n'aide pas à augmenter l'efficacité d'interface hertzienne et l'efficacité de traitement. Dans les modes de réalisation de la présente invention, un dispositif de réception détermine des informations de rétroaction de perte continue correspondant à un segment de PDU à perte de paquets, et envoie un rapport d'état comprenant les informations de rétroaction de perte continue à un dispositif d'envoi, les informations de rétroaction de perte continue comprenant un SN d'au moins une PDU, et ne comprenant pas de SN de toutes les PDU dans le segment de PDU à perte de paquets. Étant donné que les informations de rétroaction de perte continue ne comprennent pas les SN de toutes les PDU dans le segment de PDU à perte de paquets, lorsqu'une pluralité de PDU continues subissent simultanément une perte de paquets, des surdébits de rapport d'état de RLC sont économisés, ce qui permet d'augmenter l'efficacité, et d'économiser des ressources de transmission.
PCT/CN2018/084601 2017-05-04 2018-04-26 Dispositif et procédé permettant de réaliser une rétroaction Ceased WO2018201960A1 (fr)

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