WO2019085920A1

WO2019085920A1 - Information transmission method and communication device

Info

Publication number: WO2019085920A1
Application number: PCT/CN2018/112842
Authority: WO
Inventors: 邝奕如; 王键; 徐海博
Original assignee: 华为技术有限公司
Priority date: 2017-11-03
Filing date: 2018-10-31
Publication date: 2019-05-09
Also published as: CN109756306B; CN109756306A

Abstract

Provided are an information transmission method and a communication device. The method comprises: a first device generating a status report, wherein the status report comprises at least one first sequence number field, and each first sequence number field indicates the sequence number offset of a data packet corresponding to each first sequence number field; and the first device sending the status report to a second device. According to the information transmission method and the communication device provided in the embodiments of the present application, the first device can implicitly indicate to the second device a sequence number of the data packet by means of the sequence number offset, that is indicated by the first sequence number field of the status report, of the data packet. Since the value of the sequence number offset is less than the value of a sequence number, the number of bits used for indicating the sequence number offset is less than the number of bits used for indicating the sequence number. Therefore, the overhead of a status report can be reduced.

Description

Information transmission method and communication device

Technical field

The embodiments of the present application relate to communication technologies, and in particular, to an information transmission method and a communication device.

Background technique

In an LTE communication system, a Radio Link Control (RLC) layer is located between a Packet Data Convergence Protocol (PDCP) layer and a Media Access Control (MAC) layer. The function of the RLC layer is implemented by the RLC entity. When the transmitting device and the receiving device perform data processing, the data received by the RLC entity from the MAC layer or the data sent by the RLC entity to the MAC layer is referred to as an RLC Protocol Data Unit (PDU). The RLC PDU includes: an RLC data PDU and an RLC control PDU. The RLC Control PDU includes: a STATUS Protocol Data Unit (STATUS PDU).

In the prior art, when the RLC entity of the receiving device works in an Acknowledged Mode (AM), the RLC entity of the receiving device can provide a reliable transmission service through an Automatic Repeat Request (ARQ) process. In the ARQ process, the RLC entity of the receiving device may carry each SN that receives the failed RLC data PDU through the STATUS PDU, and indicate to the transmitting device which RLC data PDUs have failed to be received. The receiving device receives the STATUS PDU, and may retransmit the received RLC data PDU indicated by the STATUS PDU to the receiving device to improve transmission reliability.

In order to cope with the explosive growth of mobile data traffic in the future, the connection of devices for mass mobile communication, and the emerging new services and application scenarios, 5G communication systems have emerged. In the 5G communication system, the SN length of the RLC data PDU becomes long. If the receiving device still sends the STATUS PDU in the format of sending the STATUS PDU in the foregoing LTE communication system, that is, carrying each SN that receives the failed RLC data PDU, the STATUS PDU overhead is large. Therefore, how to transmit the STATUS PDU in the future 5G communication system is an urgent problem to be solved.

Summary of the invention

The embodiment of the present application provides an information transmission method and a communication device, which are used to solve the technical problem that the STATUS PDU has a large overhead.

In a first aspect, an embodiment of the present application provides an information transmission method, where the method includes:

The first device generates a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of each data packet corresponding to the first sequence number field;

The first device sends the status report to a second device.

With the information transmission method provided by the first aspect, the first device indicates the sequence number of the data packet by the first sequence number field of the status report, and implicitly indicates the sequence number of the data packet to the second device. Since the value of the sequence number offset is smaller than the value of the sequence number, the number of bits occupied by the indicator number offset is smaller than the number of bits occupied by the indicator number. Therefore, the overhead of the status report can be reduced in the case where the status report flexibly indicates the sequence number of the data packet.

In a possible implementation, the sequence number offset of the data packet corresponding to the first sequence number field is: the sequence number of the data packet corresponding to the first sequence number field is relative to the previous data loss of part or all of the data. The offset of the serial number of the packet; or,

The sequence number offset of the data packet corresponding to the first sequence number field is: an offset of the sequence number of the data packet corresponding to the first sequence number field with respect to the sequence number of the first data packet in which part or all of the data is lost; or,

The status report further includes at least one second serial number field, each of the second serial number fields indicating a sequence number of a data packet corresponding to each of the second serial number fields; and a serial number of the data packet corresponding to the first serial number field The shift amount is: an offset of a sequence number of the data packet corresponding to the first sequence number field with respect to a sequence number of the data packet corresponding to the previous sequence number field; the previous sequence number field is the first sequence number field or the first Two serial number field.

The information transmission method provided by the possible implementation manner can flexibly indicate the sequence number offset of the data packet by causing the status report to pass through the first sequence number field, and expand the usage scenario of the status report while reducing the state report overhead.

In a possible implementation manner, the status report further includes at least one indication domain;

When the indication field is the first value, the sequence number field corresponding to the indication field is the first sequence number field, and when the indication field is the second value, it is used to indicate the indication field. The corresponding sequence number field is the second sequence number field.

The information transmission method provided by the possible implementation manner, by using the foregoing indication domain that can distinguish the first sequence number field and the second sequence number field, the first device may indicate the sequence number offset of the data packet by using the first sequence number field, and may enable When the status report flexibly indicates the sequence number of the packet, the overhead of the status report is reduced.

When the indication field is the third value in the value set, the sequence number field corresponding to the indication field is the first sequence number field, and the length of the first sequence number field is the third The value corresponding to the value, when the indication field is the fourth value, the sequence number field corresponding to the indication field is the second sequence number field, where the value set includes at least two thirds Value.

The information transmission method provided by the possible implementation manner may be used to indicate the length of the first serial number field, and the indication domain of the first serial number domain and the second serial number domain may be distinguished, and the first device may pass the first of different lengths. The sequence number field indicates the sequence number offset of the packet, further reducing the overhead of status reporting.

When the indication field is the fifth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the sequence number of the data packet corresponding to the indication domain is not used. The domain is the first serial number field;

The indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value;

When the indication field is the sixth value, the sequence number of the data packet corresponding to the indication domain is adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no serial number field in the status report;

When the indication field is the seventh value, the sequence number of the data packet corresponding to the indication domain is the same as the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no sequence number field in the status report;

When the indication field is the eighth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is The sequence number field is the second sequence number field.

The information transmission method provided by the possible implementation manner, by using the indication field, the first device may indicate the sequence number of the data packet in the status report by using the first sequence number field according to the sequence number of the data packet in which part or all of the data is lost. The offset, or, without the sequence number field in the status report, further reduces the overhead of status reporting.

In a possible implementation, the sequence number offset of the data packet corresponding to the first sequence number field is less than or equal to a preset offset threshold; and the sequence number offset of the data packet corresponding to the second sequence number field is greater than Preset offset threshold.

With the information transmission method provided by the possible implementation manner, the first device determines whether the first sequence number field indicates the sequence number offset of the data packet or the second sequence number field indicates the data by using the preset offset threshold. The sequence number of the packet ensures that the length of the first sequence number field is smaller than the length of the second sequence number field, and the purpose of reducing the overhead of the status report is achieved.

In a possible implementation manner, the status report further includes: at least one sequence number range field, where each of the sequence number range fields is used to indicate a quantity of multiple data packets, and the plurality of data packets are partially or completely Data is lost, and the plurality of data packets are a plurality of consecutive data packets.

Through the information transmission method provided by the possible implementation manner, the first device may indicate, by using the sequence number range field, the number of consecutive and consecutive data packets that have some or all of the data lost, and only a plurality of existing presences may be indicated in the prior art. Compared to all data lost and continuous packets, the number of sequence numbers indicating the presence of all data loss can be reduced, further reducing the overhead of status reporting.

In a possible implementation manner, the data packet corresponding to the first sequence number field is a data packet in which a part of data is lost in a plurality of consecutive data packets indicated by the sequence number range field.

With the information transmission method provided by the possible implementation manner, the first device indicates, by using the first sequence number field, the sequence number offset of the data packet in which the partial data loss exists in the plurality of consecutive data packets indicated by the sequence number range field, to implicitly The indication indicates that the sequence number of the data packet with partial data loss exists in the plurality of consecutive data packets indicated by the sequence number range field, and the purpose of reducing the overhead of the status report is achieved.

In a second aspect, an embodiment of the present application provides an information transmission method, where the method includes:

The second device receives a status report sent by the first device, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields. ;

The second device retransmits the data packet corresponding to each of the first sequence number domains to the first device according to the status report.

For the beneficial effects of the information transmission method provided by the foregoing second aspect and the possible implementation manners of the second aspect, reference may be made to the beneficial effects brought by the foregoing first aspect and the possible implementation manners of the first aspect, Let me repeat.

In a third aspect, an embodiment of the present application provides a communications device, where the communications device includes:

a processing module, configured to generate a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

a sending module, configured to send the status report.

For the beneficial effects of the communication device provided by the foregoing third aspect and the possible implementation manners of the third aspect, reference may be made to the beneficial effects brought by the first aspect and the possible implementation manners of the first aspect, and no longer Narration.

In a fourth aspect, an embodiment of the present application provides a communications device, where the communications device includes:

a receiving module, configured to receive a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

And a processing module, configured to retransmit, according to the status report, a data packet corresponding to each of the first sequence number domains by using a sending module.

The second device provided by the foregoing fourth aspect and the possible embodiments of the fourth aspect, the beneficial effects of which can be seen in the first aspect and the possible implementations of the first aspect, which are not Let me repeat.

In a fifth aspect, an embodiment of the present application provides a communications device, where the communications device includes:

a processor, configured to generate a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

A sender for transmitting the status report.

For the beneficial effects of the communication device provided by the foregoing fifth aspect and the possible implementation manners of the fifth aspect, reference may be made to the beneficial effects brought by the first aspect and the possible implementation manners of the first aspect, and no longer Narration.

In a sixth aspect, the embodiment of the present application provides a communications device, where the communications device includes:

a receiver, configured to receive a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

And a processor, configured to retransmit, according to the status report, a data packet corresponding to each of the first sequence number domains by using a transmitter.

The beneficial effects of the second device provided by the foregoing sixth aspect and the possible implementation manners of the sixth aspect may be referred to the advantages of the first aspect and the possible implementation manners of the first aspect, which are not Let me repeat.

In a seventh aspect, an embodiment of the present application provides a communication device, where the communication device includes at least one processing element (or chip) for performing the method of the above first aspect.

In an eighth aspect, an embodiment of the present application provides a communication device, where the communication device includes at least one processing element (or chip) for performing the method of the above second aspect.

In a ninth aspect, an embodiment of the present application provides a program for executing the method of the above first aspect when executed by a processor.

In a tenth aspect, the embodiment of the present application provides a program, when executed by a processor, for performing the method of the above second aspect.

In an eleventh aspect, the embodiment of the present application provides a program product, such as a computer readable storage medium, including the program of the ninth aspect.

In a twelfth aspect, the embodiment of the present application provides a program product, such as a computer readable storage medium, including the program of the tenth aspect.

In a thirteenth aspect, the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, and when executed on a computer, causes the computer to execute the method of the first aspect.

In a fourteenth aspect, the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform the method of the second aspect.

In the information transmission method and the communication device provided by the embodiment of the present application, the first device indicates the sequence number offset of the data packet through the first sequence number field of the status report, and implicitly indicates the sequence number of the data packet to the second device. Since the value of the sequence number offset is smaller than the value of the sequence number, the number of bits occupied by the indicator number offset is smaller than the number of bits occupied by the indicator number. Therefore, the overhead of the status report can be reduced in the case where the status report flexibly indicates the sequence number of the data packet.

DRAWINGS

1 is a frame diagram of a communication system according to an embodiment of the present application;

2 is a schematic structural diagram of a conventional partial protocol stack according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a conventional STATUS PDU according to an embodiment of the present disclosure;

FIG. 4 is a signaling flowchart of an information transmission method according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another existing STATUS PDU according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a STATUS PDU according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another STATUS PDU according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of still another STATUS PDU according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a receiving state of an AMD PDU according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another communication device according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of still another communication device according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of still another communication device according to an embodiment of the present application.

Detailed ways

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application. As shown in FIG. 1, the communication system includes: a network device 01 and a terminal device 02. When the network device 01 is a transmitting device, the terminal device 02 is a receiving device, and when the terminal device 02 is a transmitting device, the network device 01 is a receiving device. among them,

The network device: may be the foregoing base station, or various wireless access points, or may refer to a device in the access network that communicates with the terminal device through one or more sectors on the air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Global System of Mobile communication (GSM) or a Base Transceiver Station (BTS) in Code Division Multiple Access (CDMA), or may be a wideband code division multiple access ( The base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) may also be an evolved base station (Evolutional Node B, eNB or eNodeB) in Long Term Evolution (LTE), or a relay station or an access point. , or the base station gNB in the future 5G network, etc., is not limited herein.

Terminal device: may be a wireless terminal or a wired terminal, the wireless terminal may be a device that provides voice and/or other service data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem. . The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal. For example, it may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (Personal Digital Assistant, PDA) and other equipment. The wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a remote terminal. The access terminal, the user terminal (User Terminal), the user agent (User Agent), and the user device (User Device or User Equipment), and the sensor having the network access function are not limited herein.

It should be noted that the foregoing communication system may be an LTE communication system, or may be other communication systems in the future, such as a 5G communication system, and the like, which is not limited herein.

FIG. 2 is a schematic structural diagram of a conventional partial protocol stack according to an embodiment of the present application. As shown in FIG. 2, in an LTE communication system, an RLC layer is located between a PDCP layer and a MAC layer. The function of the RLC layer is implemented by the RLC entity. When the transmitting device and the receiving device perform data processing, the data received by the RLC entity from the MAC layer, or the data sent by the RLC entity to the MAC layer is referred to as an RLC PDU, and may also be referred to as a MAC data service unit (SDU). ).

In the prior art, the aforementioned RLC entity can work in the AM to provide a reliable transmission service. An RLC entity working in an AM may be referred to as an AM RLC entity. Currently, an AM RLC entity can transmit and/or receive two types of RLC PDUs, which are an RLC data PDU and an RLC control PDU, respectively. The RLC data PDU includes: Acknowledged Mode Data (AMD) PDU and AMD PDU segment. The RLC Control PDU includes: a STATUS PDU.

Specifically, the AM RLC entity can provide a reliable transmission service through the ARQ process. In the ARQ process, the AM RLC entity of the receiving device detects, by using the sequence number (SN) of the received AMD PDU, whether all or part of the data of the AMD PDU is received by the receiving device. Then, the receiving device can indicate to the transmitting device which AMD PDUs are successfully received and which AMD PDUs are received by carrying the SN of the successfully received AMD PDU in the STATUS PDU and receiving the SN of the failed AMD PDU. The transmitting device receives the STATUS PDU, and may retransmit the AMD PDUs to the receiving device based on the received AMD PDU indicated by the STATUS PDU. If part of the data of the foregoing AMD PDU is received by the receiving device, that is, the partial segment of the AMD PDU (ie, the AMD PDU segment) is received by the receiving device, the receiving device may request the sending device to retransmit the AMD through the STATUS PDU. Partial segmentation of the PDU.

It should be noted that, by using the STATUS PDU, the receiving device indicates to the sending device which AMD PDUs are successfully received, and may be regarded as an Acknowledgement (ACK). The receiving device indicates, by using the STATUS PDU, which AMD PDUs are failed to be received by the sending device, and may be regarded as a Negative Acknowledgement (NACK).

For ease of understanding, the structure of the existing STATUS PDU is briefly introduced below. FIG. 3 is a schematic structural diagram of a conventional STATUS PDU according to an embodiment of the present application. As shown in FIG. 3, in the prior art, in the LTE system, the STATUS PDU sent by the receiving device is composed of a STATUS PDU payload and a STATUS control PDU header. Optionally, if the STATUS PDU is not byte aligned, the receiving device may also pad padding the partial bits at the end of the STATUS PDU to implement byte alignment. Therefore, the above STATUS PDU may also include padding.

The above STATUS control PDU header consists of a Data/Control (D/C) field and a Control Protocol Data Unit Type (CPT) field. The D/C field is used to indicate which type of PDU (ie, RLC data PDU or RLC control PDU) the RLC PDU in which the D/C domain is located. For example, when the value of the D/C field is 0, it indicates that the RLC PDU where the D/C domain is located is an RLC control PDU, that is, a STATUS PDU. When the value of the D/C field is 1, it indicates that the RLC PDU where the D/C domain is located is an RLC data PDU. When the D/C field indicates that the RLC PDU in which the D/C domain is located is an RLC control PDU, the CPT field is used to indicate the type of the RLC control PDU. It should be noted that since the current protocol only defines one type of RLC control PDU, namely STATUS PDU. Therefore, the above CPT domain currently only has one value, and other values are reserved and are not used. For example, when the CPT field has a value of "000" (binary number), it indicates that the RLC control PDU is a STATUS PDU.

The above STATUS PDU payload consists of an "ACK_SN+Extension (E)1", 0 or at least one "NACK_SN+E1+E2" and possibly "SOstart+SOend". Each NACK_SN domain corresponds to a part of data of the received device or an AMD PDU whose data has failed to be received. Each NACK_SN domain carries the SN of the AMD PDU corresponding to the NACK_SN domain. If all AMD PDUs fail to receive, the AMD PDU may be indicated by a combination of "NACK_SN+E1+E2". If the partial segmentation (ie, AMD PDU segment) of an AMD PDU fails to be received, the AMD PDU segment may be indicated by a combination of "NACK_SN+E1+E2"+"SOstart+SOend". The SOstart field is used to indicate the location of the first byte of the AMD PDU segment in the Data field of the AMD PDU, and the SOend field is used to indicate the location of the last byte of the AMD PDU segment in the Data field of the AMD PDU. . The value of the ACK_SN field is the SN value of the RLC data PDU that has not been received and received in the STATUS PDU, and is used to indicate the AMD PDU indicated by the NACK_SN and the AMD indicated by NACK_SN+SOstart+SOend. The PDU segment, the AMD PDU and/or the AMD PDU segment whose SN is smaller than the SN indicated by the ACK_SN field are all successfully received by the receiving device.

The E1 field is used to indicate whether a combination of "ACK_SN+E1", "NACK_SN+E1+E2" or "NACK_SN+E1+E2+SOstart+SOend" is followed by a "NACK_SN+E1+E2" combination. . For example, when the value of the E1 field is 1, it indicates that after the combination of "ACK_SN+E1", "NACK_SN+E1+E2" or "NACK_SN+E1+E2"+"SOstart+SOend", immediately followed by a "NACK_SN+E1" +E2" combination. When the value of the E1 field is 0, it indicates that there is no "NACK_SN+E1+E2" combination after the combination of "ACK_SN+E1", "NACK_SN+E1+E2" or "NACK_SN+E1+E2"+"SOstart+SOend" . The above E2 field is used to indicate whether a "SOstart+SOend" combination is followed by "NACK_SN". For example, when the E2 field takes a value of 1, it indicates that after "NACK_SN", it is followed by a "SOstart+SOend" combination. When the value of the E2 field is 0, it indicates that there is no "SOstart+SOend" combination after the "NACK_SN" combination.

It should be noted that, in this embodiment of the present application, the size of the ACK_SN domain and the NACK_SN domain are not limited, and FIG. 3 shows a STATUS PDU in which the ACK_SN domain and the NACK_SN domain are 10 bits. In addition, the embodiment of the present application does not limit the representation of the foregoing STATUS PDU structure. The embodiment of the present application is a STATUS PDU structure indicated by a byte (Oct) unit.

In order to cope with the explosive growth of mobile data traffic in the future, the connection of devices for mass mobile communication, and the emerging new services and application scenarios, 5G communication systems have emerged. In the 5G communication system, the SN length of the AMD PDU becomes longer. If the STATUS PDU is still transmitted in the format of the STATUS PDU transmitted in the LTE communication system, that is, the SN of each AMD PDU that fails to be received is caused, which causes the STATUS PDU to be expensive. . Therefore, how to transmit the STATUS PDU in the future 5G communication system is an urgent problem to be solved.

In view of the above problem, the embodiment of the present application provides an information transmission method, which can reduce the overhead of the STATUS PDU in the case of flexibly indicating the SN of the AMD PDU and/or the AMD PDU segment that failed to be received.

The technical solutions of the present application are described in detail below through some embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

FIG. 4 is a signaling flowchart of an information transmission method according to an embodiment of the present application. In this embodiment, the first device reduces the signaling overhead of the status report sent to the second device by carrying the first sequence number field indicating the sequence number offset of the data packet in the status report. As shown in FIG. 4, the method may include:

S101. The first device generates a status report, where the status report includes at least one first sequence number field, and each first sequence number field indicates a sequence number offset of the data packet corresponding to each first sequence number field.

In this embodiment, when the first device is a sending device, the second device is a receiving device, or when the first device is a receiving device, the second device is a sending device. The following describes the information transmission method provided by the embodiment of the present application by taking the first device as the receiving device and the second device as the sending device as an example.

The above mentioned data packet may be the aforementioned AMD PDU. The definition of the sequence number offset of the AMD PDU mentioned above may be specifically determined according to the definition of the sequence number of the AMD PDU. For example, when the serial number of the AMD PDU is SN, the above-mentioned serial number offset is an SN offset. It should be noted that the definition of the sequence number offset of the AMD PDU mentioned above may be defined according to other variables indicating the order of the AMD PDU, which is not limited herein.

The status report mentioned above may be the aforementioned STATUS PDU, which is used to indicate the SN of the AMD PDU in which some or all of the data is lost, that is, the SN of the AMD PDU in which part or all of the data reception fails. The other features of the above status report are not limited in the embodiment of the present application. For example, in other application scenarios, the foregoing first device may indicate the SN offset of other data packets through the status report, so as to reduce the overhead of the status report, which is not repeatedly described herein. In addition, it will be understood by those skilled in the art that the above-mentioned status report may still use the term of the aforementioned STATUS PDU in the 5G mobile communication system, and other terms may be used. Therefore, the embodiment of the present application does not limit the naming of the status report in each communication system. The following embodiment is described by taking the status report as a STATUS PDU as an example.

Specifically, after detecting, by the first device, the SN of the AMD PDU sent by the second device that is successfully received, the first device may generate a STATUS PDU after all the data or part of the data of the AMD PDU is received by the receiving device. The STATUS PDU may indicate to the second device that the first device receives the failed AMD PDU through the first SN domain, that is, indicates to the second device that there is partial data or all data loss AMD PDUs. Each of the first SN domains may correspond to an AMD PDU with partial data or all data loss, and is used to indicate an SN offset of the AMD PDU to implicitly indicate an SN of the AMD PDU. Since the value of the SN offset is smaller than the value of the SN, the number of bits indicating the SN offset is smaller than the number of bits occupied by the indication SN. Therefore, in the above manner, the overhead of the STATUS PDU can be reduced in the case where the STATUS PDU is caused to indicate the SN of the AMD PDU that failed to be received.

The embodiment does not limit the structure of the STATUS PDU provided by the embodiment of the present application. For example, the STATUS PDU provided by the embodiment of the present application may be a STATUS PDU that is improved in the structure of the STATUS PDU shown in FIG. 3 described above. That is, the STATUS PDU provided by the embodiment of the present application is still composed of a STATUS control PDU header and a STATUS PDU payload. Among them, the STATUS control PDU header still uses the content shown in Figure 3. The STATUS PDU payload differs from the STATUS PDU payload shown in FIG. 3 in that at least one NACK_SN field shown in FIG. 3 is replaced with the first SN field. For example, a NACK_SN field other than the first NACK_SN field in the STATUS PDU may be replaced with the first SN field. The first SN domain may indicate the SN offset of the AMD PDU by filling the SN offset of the AMD PDU. In the above manner, the STATUS PDU can be made to indicate at least a part of the SN offset of the AMD PDU that failed to be received, without indicating the SN of each AMD PDU that failed to be received, and the STATUS PDU overhead is reduced. It will be understood by those skilled in the art that the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 3, and thus the illustrations are not used separately.

It should be noted that, in this implementation, the definition of the SN offset of the data packet corresponding to the first SN domain is not limited. For example, the SN offset of the data packet corresponding to the first SN domain may be: the SN of the AMD PDU corresponding to the first SN domain with respect to the SN of the AMD PDU with some or all of the data loss. the amount. Alternatively, the SN offset of the AMD PDU corresponding to the first SN domain may be: an offset of the SN of the AMD PDU corresponding to the first SN domain with respect to the SN of the first AMD PDU in which part or all of the data is lost. Or the foregoing STATUS PDU further includes at least one second SN domain, where each second SN domain corresponds to an AMD PDU with partial data or all data loss, used to indicate the SN of the AMD PDU, that is, the foregoing embodiment The "NACK_SN" field. In this scenario, the SN offset of the AMD PDU corresponding to the first SN domain may be an offset of the SN of the AMD PDU corresponding to the first SN domain with respect to the SN of the AMD PDU corresponding to the previous SN domain. The previous SN domain may be the first SN domain or the second SN domain. Optionally, in some embodiments, the SN offset of the data packet corresponding to the first SN domain is: the SN of the AMD PDU corresponding to the first SN domain is relative to the AMD PDU corresponding to the ACK_SN domain in the STATUS PDU. The offset of the SN, etc.

S102. The first device sends the status report to the second device.

S103. The second device receives the status report.

S104. The second device retransmits the data packet corresponding to each first sequence number field to the first device according to the status report.

Specifically, after receiving the STATUS PDU sent by the first device, the second device may determine, according to the SN offset of the AMD PDU indicated by the first SN field of the STATUS PDU, an AMD PDU corresponding to each first SN domain. SN.

Optionally, the SN offset of the AMD PDU corresponding to the first SN domain is, when the SN of the AMD PDU corresponding to the first SN domain is offset from the SN of the AMD PDU with a partial or all data loss. The second device may add the SN offset indicated by each first SN domain to the SN of the AMD PDU in which some or all of the data is lost, respectively, to obtain an AMD PDU corresponding to each first SN domain. SN. It should be noted that the AMD PDU in which some or all of the data is lost may be the last AMD PDU with some or all data loss, or may be one of the AMD PDUs with some or all of the data loss. PDU.

Alternatively, when the SN offset of the AMD PDU corresponding to the first SN domain is the offset of the SN of the AMD PDU corresponding to the first SN domain with respect to the SN of the first AMD PDU in which part or all of the data is lost, The foregoing second device may separately add the SN offset indicated by each first SN domain to the SN of the first AMD PDU in which part or all of the data is lost, to obtain an AMD PDU corresponding to each first SN domain. SN.

Alternatively, when the SN offset of the AMD PDU corresponding to the first SN domain is the offset of the SN of the AMD PDU corresponding to the first SN domain with respect to the SN of the AMD PDU corresponding to the previous SN domain, the second device The SN offset indicated by each first SN domain may be added to the SN of the AMD PDU corresponding to the previous SN domain to obtain the SN of the AMD PDU corresponding to each first SN domain. It should be noted that the AMD PDU corresponding to the previous SN domain may be the AMD PDU corresponding to the previous SN domain, or may be one of the AMD PDUs corresponding to the previous SN domain.

Or, the SN offset of the AMD PDU corresponding to the first SN domain is the offset of the SN of the AMD PDU corresponding to the first SN domain with respect to the SN of the AMD PDU corresponding to the ACK_SN field in the STATUS PDU, and the second The device may separately subtract the SN offset indicated by each first SN domain from the SN of the AMD PDU corresponding to the ACK_SN domain to obtain the SN of the AMD PDU corresponding to each first SN domain.

After determining the SN of the AMD PDU corresponding to each first SN domain, the foregoing second device may retransmit the AMD PDU corresponding to each SN to the first device. If the AMD PDU corresponding to the SN is only partially fragmented, the first device may further indicate the segmentation of the AMD PDU by carrying a combination of “SOstart+SOend” associated with the first SN domain in the STATUS PDU. So that the second device can retransmit the segment to the first device. Optionally, if the STATUS PDU further includes at least one second SN domain, the second device may determine, according to the value of each second SN domain of the STATUS PDU, the AMD PDU corresponding to each second SN domain. SN. Then, the second device may retransmit the AMD PDU or the AMD PDU segment corresponding to each first SN domain to the first device, or may also be based on the SN of the AMD PDU corresponding to each second SN domain. AMD PDU corresponding to the SN. If the AMD PDU corresponding to a certain SN is only partially fragmented, the first device may further indicate the segmentation of the AMD PDU by carrying a combination of “SOstart+SOend” associated with the second SN domain in the STATUS PDU. So that the second device can retransmit the segment to the first device. For the second device, how to retransmit the AMD PDU or the AMD PDU to the first device can be referred to the prior art, and details are not described herein.

Since the value of the SN offset is smaller than the value of the SN, the number of bits occupied by the SN offset is smaller than the number of bits occupied by the SN. Therefore, in the foregoing manner, the STATUS PDU can be used to retransmit the AMD PDU that fails to be received, and the STATUS PDU overhead can be reduced under the premise of ensuring data transmission reliability.

In the information transmission method provided by the embodiment of the present application, the first device indicates the sequence number offset of the data packet by using the first sequence number field of the status report, and implicitly indicates the sequence number of the data packet to the second device, because the sequence number offset is taken. The value is smaller than the value of the sequence number, so the number of bits occupied by the indicator number offset is smaller than the number of bits occupied by the indicator number. Therefore, the overhead of the status report can be reduced in the case where the status report flexibly indicates the sequence number of the data packet.

In the future 5G communication system, since the RLC entity is only responsible for dividing the RLC PDU, it does not perform cascading processing. Therefore, after the second device sends the split AMD PDU to the MAC layer, the MAC layer encapsulates the split AMD PDU into the MAC PDU, so that the number of AMD PDUs connected to the SN in the MAC PDU is greater than that of the LTE. The number of AMD PDUs connected to the SN in the MAC PDU in the system. In this scenario, if the first device fails to receive a MAC PDU sent by the second device, the multiple consecutive AMD PDUs included in the MAC PDU may fail to be received. Therefore, in order to reduce the overhead of the status report, the 5G standard introduces a "NACK SN range" field and an E3 field based on the STATUS PDU shown in FIG. 3 above.

FIG. 5 is a schematic structural diagram of another existing STATUS PDU according to an embodiment of the present application. As shown in FIG. 5, the "NACK SN range" field is used to indicate the number of consecutive packets that accept failure. The "NACK SN range" field may be associated with a "NACK_SN" field for indicating that there are consecutive NACK SN range AMD PDU losses starting from the SN indicated by the "NACK_SN" field. In addition, the "NACK SN range" field can also associate a pair of "SOstart" domains and "SOend domains". The "SOstart" field is used to indicate the location of the first byte of the plurality of consecutive lost AMD PDUs in the Data field of the first lost AMD PDU, and the "SOend field" is used to indicate the multiple consecutive The last byte of the lost AMD PDU is in the Data field of the last AMD PDU. The E3 field is used to indicate whether a "NACK SN range" is followed immediately after the current "NACK_SN".

In addition, the 5G standard also introduces an "R" field in the STATUS PDU shown in FIG. 5 above. The "R" field is reserved and the device that sends the STATUS PDU can set the "R" field to zero. Accordingly, the device receiving the STATUS PDU can ignore the "R" field, i.e., do nothing. It should be noted that the number and location of the "R" field in the STATUS PDU structure may need to be set and laid out, which is not limited in this embodiment of the present application.

The structure of the STATUS PDU provided by the embodiment of the present application is described and illustrated based on the STATUS PDU shown in FIG. That is, the STATUS PDU provided by the embodiment of the present application is an improved STATUS PDU based on the STATUS PDU shown in FIG. 5. Specifically, the following structures may be included:

The first structure: FIG. 6 is a schematic structural diagram of a STATUS PDU according to an embodiment of the present application. FIG. 7 is a schematic structural diagram of another STATUS PDU according to an embodiment of the present application. FIG. 8 is a schematic structural diagram of still another STATUS PDU according to an embodiment of the present application. As shown in Figures 6, 7, and 8, the STATUS PDU is still composed of the STATUS control PDU header and the STATUS PDU payload. Among them, the STATUS control PDU header still uses the content shown in Figure 5.

The STATUS PDU payload differs from the STATUS PDU payload shown in FIG. 5 in that at least one NACK_SN domain (ie, the second SN domain) shown in FIG. 5 is replaced with at least one NACK_SN_Offset field (ie, the first SN domain). For example, a NACK_SN field other than the first NACK_SN field in the STATUS PDU may be replaced with the first SN field. The first SN domain may indicate the SN offset of the AMD PDU by filling the SN offset of the AMD PDU. In the above manner, the STATUS PDU can be made to indicate at least a part of the SN offset of the AMD PDU that failed to be received, without indicating the SN of each AMD PDU that failed to be received, and the STATUS PDU overhead is reduced.

In this scenario, if the SN of the AMD PDU with the partial or all data loss in the STATUS PDU payload is indicated by the NACK_SN domain (ie, the second SN domain), other AMD PDUs with some or all data loss are present. The SNs are all indicated using the NACK_SN_Offset field (ie the first SN field). In this scenario, the foregoing STATUS PDU may not separately set the indication field, and is used to distinguish whether the current SN domain is a NACK_SN domain (ie, a second SN domain) or a NACK_SN_Offset domain (ie, a first SN domain). That is to say, in this scenario, the foregoing STATUS PDU can adopt the STATUS PDU structure shown in FIG. 5 without adding any domain. After replacing the NACK_SN domain (ie, the second SN domain) with the NACK_SN_Offset field (ie, the first SN domain), the number of bits (ie, the length) occupied by the NACK_SN_Offset field is smaller than the number of bits occupied by the NACK_SN domain, and therefore, in this scenario. The total length of the STATUS PDU is less than the STATUS PDU length shown in Figure 5, reducing the overhead of transmitting the STATUS PDU.

Or, in the scenario, the foregoing STATUS PDU may include at least one indication domain, where each indication domain may correspond to one SN domain, or may correspond to an AMD PDU or the like with some or all data loss, for indicating the indication. The SN field of the AMD PDU corresponding to the domain in the STATUS PDU. In the specific implementation, the foregoing indication domain may include the following implementation manners:

The first mode: each indication field corresponds to one SN field in the STATUS PDU, and is used to indicate whether the SN domain is a NACK_SN_Offset domain (ie, a first SN domain) or a NACK_SN domain (ie, a second SN domain). Specifically, when the indication field is the first value, the SN field corresponding to the indication field is used to be a NACK_SN_Offset field (that is, the first SN domain), and when the indication field is the second value, it is used to indicate the The SN field corresponding to the indication domain is a NACK_SN domain (ie, a second SN domain).

For example, the E1 field in the STATUS PDU shown in FIG. 5 above may be extended to 2 bits so that the E1 field can indicate whether or not a "NACK_SN+E1+E2+E3" or "NACK_SN_Offset+E1+E2+E3" is followed. "combination. That is, the E1 field is referred to as the aforementioned indication field. In this scenario, the structure of the above STATUS PDU can be, for example, as shown in FIG.

In specific implementation, when the above E1 domain is different in value, the information indicated may be, for example, as shown in Table 1 below:

Table 1

For example, a 1-bit E4 field may be added to the STATUS PDU shown in FIG. 5, so that the E4 field is used to indicate whether the SN field immediately following the E4 field is the NACK_SN_Offset field (ie, the first SN domain) or NACK_SN domain (ie, the second SN domain). That is, the E4 field is referred to as the aforementioned indication field. It should be noted that, at this time, the E1 field indicates whether a combination of "NACK_SN+E1+E2+E3+E4" or "NACK_SN_Offset+E1+E2+E3+E4" is followed, and the specific combination is The NACK_SN_Offset field is still indicated by the E4 field for the NACK_SN field. In this scenario, the structure of the foregoing STATUS PDU can be, for example, as shown in FIG.

In specific implementation, when the above E4 domain is different in value, the information indicated may be, for example, as shown in Table 2 below:

Table 2

E4＝0E4=0	紧跟着一个“NACK_SN”域Followed by a "NACK_SN" domain
E4＝1E4=1	紧跟着一个“NACK_SN_Offset”域Immediately followed by a "NACK_SN_Offset" field

For example, the STATUS PDU structure shown in Figure 5 includes the "E1+E2+E3" combination. The value of the "E1+E2+E3" combination includes: 000, 001, 010, 011, 100, 101, 110, 111. The values 000, 100, 101, 110, and 111 have been used, and the values 001, 010, and 011 are idle. Therefore, the "E1+E2+E3" combination can be used as the indication domain while keeping the STATUS PDU structure unchanged. For example, the SN field immediately followed by any one of the values 001, 010, and 011 is the NACK_SN_Offset field (ie, the first SN field). In this scenario, the structure of the foregoing STATUS PDU can be, for example, as shown in FIG. 8.

In specific implementation, when the above-mentioned "E1+E2+E3" combination is different in value, the indicated information may be, for example, as shown in Table 3 below:

table 3

E1+E2+E3＝100E1+E2+E3=100	紧跟着一个“NACK_SN+E1+E2+E3”组合Followed by a "NACK_SN+E1+E2+E3" combination
E1+E2+E3＝001E1+E2+E3=001	紧跟着一个“NACK_SN_Offset+E1+E2+E3”组合Followed by a "NACK_SN_Offset+E1+E2+E3" combination

The second mode: each indication field corresponds to an SN field in the STATUS PDU, indicating whether the SN domain is a NACK_SN_Offset domain (ie, a first SN domain) or a NACK_SN domain (ie, a second SN domain), and a NACK_SN_Offset domain ( That is, the length of the first SN domain). Specifically, when the indication field is the third value in the value set, the SN field corresponding to the indication field is used to be a NACK_SN_Offset field (ie, a first SN domain) and a NACK_SN_Offset domain (ie, a first SN domain). The length of the SN field corresponding to the indication field is the NACK_SN domain (ie, the second SN domain), where the value set is at least the length corresponding to the third value. Two third values. That is, in this scenario, the indication field may indicate whether the corresponding SN domain is a NACK_SN_Offset domain (ie, a first SN domain) or a NACK_SN domain (ie, a second SN domain), and may also indicate a NACK_SN_Offset domain (ie, a first SN). The length of the field). In the above manner, the STATUS offset of the AMD PDU indicating the STATUS PDU can be made more flexible, further reducing the overhead of the STATUS PDU.

For example, the E1 field in the STATUS PDU shown in FIG. 5 above may be extended to 2 bits so that the E1 field can indicate whether or not a "NACK_SN+E1+E2+E3" or "NACK_SN_Offset+E1+E2+E3" is followed. "Combination, and indicating the length of the NACK_SN_Offset field (ie, the first SN field). That is, the E1 field is referred to as the aforementioned indication field. It will be understood by those skilled in the art that in this scenario, the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 6, and thus the illustrations are not used separately.

For specific implementation, when the above E1 domain is different, the information indicated may be, for example, as shown in Table 4 below:

Table 4

For example, a 2-bit E4 field may be added to the STATUS PDU shown in FIG. 5 above, so that the E4 field is used to indicate whether the SN field immediately after the E4 field is the NACK_SN_Offset field (ie, the first SN domain) or The length of the NACK_SN field (ie, the second SN domain), and the NACK_SN_Offset field (ie, the first SN domain). That is, the E4 field is referred to as the aforementioned indication field. It should be noted that, at this time, the E1 field indicates whether a combination of "NACK_SN+E1+E2+E3+E4" or "NACK_SN_Offset+E1+E2+E3+E4" is followed, and the specific combination is The NACK_SN_Offset field is still the NACK_SN field, and the length of the NACK_SN_Offset field is indicated by the E4 field. It can be understood by those skilled in the art that in this scenario, the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 7. The only difference is that the length of the E4 field is larger than the E4 field shown in FIG. 7, and therefore no longer Use the illustrations listed separately.

In specific implementation, when the above E4 domain is different in value, the information indicated may be, for example, as shown in Table 5 below:

table 5

For example, the "E1+E2+E3" combination can be used as the indication field while keeping the STATUS PDU structure shown in FIG. 5 unchanged, so that the "E1+E2+E3" combination is used to indicate "E1+E2+". The SN field immediately following the E3" field is the NACK_SN_Offset field (ie, the first SN domain) or the NACK_SN domain (ie, the second SN domain), and the length of the NACK_SN_Offset field (ie, the first SN domain). It will be understood by those skilled in the art that in this scenario, the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 8, and thus the illustrations are not used separately.

In the specific implementation, when the above-mentioned "E1+E2+E3" combination is different, the information indicated may be, for example, as shown in Table 6 below:

Table 6

The third mode: each indication field corresponds to an AMD PDU with some or all data loss, which is used to indicate the SN of the AMD PDU and the SN domain. Specifically, when the indication field is the fifth value, the SN of the AMD PDU corresponding to the indication domain is not adjacent to the SN of the AMD PDU corresponding to the previous indication domain, and the SN of the AMD PDU corresponding to the indication domain is The domain is the NACK_SN_Offset field (ie the first SN domain).

Optionally, in some embodiments, in the scenario, the indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value. The SN of the AMD PDU corresponding to the indication domain is adjacent to the SN of the AMD PDU corresponding to the previous indication domain, and the AMD PDU corresponding to the indication domain is in the There is no SN field in the status report. When the indication field is the seventh value, the SN of the AMD PDU corresponding to the indication domain is the same as the SN of the AMD PDU corresponding to the previous indication domain, and the SN domain of the AMD PDU corresponding to the indication domain has no SN domain. . When the indication field is the eighth value, the SN of the AMD PDU corresponding to the AMD PDU corresponding to the indication domain is not adjacent to the SN of the AMD PDU corresponding to the previous indication domain, and the SN domain of the AMD PDU corresponding to the indication domain is NACK_SN domain (ie, the second SN domain). In the above manner, the STATUS offset of the AMD PDU indicating the STATUS PDU can be made more flexible, further reducing the overhead of the STATUS PDU.

For example, a 2-bit E4 field may be added to the STATUS PDU shown in FIG. 5 above, that is, the E4 field is used as the aforementioned indication field. It should be noted that, at this time, the E1 field indicates whether a "NACK_SN+E1+E2+E3+E4" combination is followed, or whether a "NACK_SN_Offset+E1+E2+E3+E4" combination, or Whether it is followed by an "E1+E2+E3+E4" combination without SN domain. It can be understood by those skilled in the art that in this scenario, the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 7, and therefore the illustrations are not used separately, and it should be noted that when a certain indication field indicates tight Following a combination of "E1+E2+E3+E4" without SN domain, in the STATUS PDU structure shown in Figure 7, there is no SN field following the indication field.

For specific implementation, when the above E4 domain is different, the information indicated may be, for example, as shown in Table 7 below:

Table 7

For example, the "E1+E2+E3" combination can be used as the above indication field while maintaining the STATUS PDU structure shown in FIG. It will be understood by those skilled in the art that in this scenario, the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 8, and thus the illustrations are not used separately. It should be noted that when the indication field indicates an "E1+E2+E3" combination followed by an SN-free domain, in the STATUS PDU structure shown in FIG. 8, there is no SN domain immediately following the indication field. .

In specific implementation, when the above-mentioned "E1+E2+E3" combination is different in value, the indicated information may be, for example, as shown in Table 8 below:

Table 8

For example, the E1 field in the STATUS PDU shown in FIG. 5 described above can be expanded to 2 bits, that is, the E1 field is used as the aforementioned indication field. It will be understood by those skilled in the art that in this scenario, the STATUS PDU structure is similar to the STATUS PDU structure shown in FIG. 6, and thus the illustrations are not used separately. It should be noted that, in this scenario, the E1 field still needs to pass one of the values to indicate whether it is followed by a combination of "NACK_SN+E1+E2+E3" or "NACK_SN_Offset+E1+E2+E3". Therefore, in this example, the other three values of the E1 field are used as the fifth value, the sixth value, the seventh value, or the fifth value, the seventh value, and the eighth value. Or, as the fifth value, the sixth value, the eighth value, and the like, to indicate the indication information corresponding to the value. In addition, it should be emphasized that, in this example, when the indication field indicates an "E1+E2+E3" combination immediately following an SN-free domain, then in the STATUS PDU structure shown in FIG. 6, the indication field is followed by There is no SN domain that follows.

In the specific implementation, the fifth value, the sixth value, and the seventh value are used as examples. When the E1 field is different, the information indicated may be, for example, as shown in Table 9 below:

Table 9

It can be understood by those skilled in the art that, in some scenarios, the indication field shown in each example in the foregoing third manner may include only the fifth value and the sixth value, or the indication field may include only the fifth value. And the value of the seventh value, or the indication field may include only the fifth value, the sixth value, and the seventh value, or the indication field may include only the fifth value, the sixth value, and the The value of the octet, or the indication field may include the fifth value, the seventh value, and the eighth value, or the indication field may include the fifth value, the sixth value, the seventh value, and the eighth value. Value and so on. In these scenarios, the implementation of the indication field and the information indicated by the indication field in different values may be referred to the examples listed in the third case, and details are not described herein again. In addition, in some scenarios, the first case and the second case described above may also be used in combination with each other. For example, the foregoing indication domain may further indicate the length of the NACK_SN_Offset domain (ie, the first SN domain) and the like on the basis of the second mode, which is not exemplified herein.

In addition, in the STATUS PDU shown in FIG. 5, the "NACK SN range" field can only indicate a plurality of consecutive AMD PDUs with all data loss, if one or more AMD PDUs of the multiple AMD PDUs exist Some data is lost and cannot be indicated by the "NACK SN range" field.

For example, FIG. 9 is a schematic diagram of an AMD PDU receiving state according to an embodiment of the present application. As shown in FIG. 9, AMD PDU 1 to AMD PDU 4 are a plurality of consecutive AMD PDUs, but since some data in the AMD PDU 3 is successfully received, the STATUS PDU structure shown in FIG. 5 cannot be used. The "NACK SN range" field indicates the number of AMD PDU1 to AMD PDU4, and can only indicate the number of AMD PDU 1 to AMD PDU3, that is, 3. Since the SN numbers of AMD PDU1 to AMD PDU4 are consecutive SN numbers, and some or all of the data is lost in AMD PDU 1 to AMD PDU4, when the STATUS PDU structure shown in FIG. 5 is adopted, the STATUS PDU still exists. A problem with a large overhead.

In the STATUS PDU structure provided in this embodiment, the STATUS PDU may further include: at least one “NACK SN range” field (ie, SN range field), and each “NACK SN range” field is used to indicate the number of multiple AMD PDUs. . There are some or all of the data loss of the multiple AMD PDUs, and the multiple AMD PDUs are multiple consecutive AMD PDUs. Corresponding to the example shown in FIG. 9 above, in the implementation manner of this embodiment, the “NACK SN range” field may indicate the number of AMD PDU 1 to AMD PDU 4, that is, 4. That is to say, the plurality of consecutive AMD PDUs indicated by the "NACK SN range" field include AMD PDUs with all data loss, and AMD PDUs with only partial data loss.

Further, the foregoing STATUS PDU may further indicate that there is partial data loss indicated by the “NACK SN range” field through the “NACK_SN” field and the “SOstart+SOend” combination, or the “NACK_SN_Offset” field and the “SOstart+SOend” combination. A specific segment of the AMD PDU. For the AMD PDU indicating that all data is lost as indicated by the "NACK SN range" field, the subsequent use of the "NACK_SN" field and the "SOstart+SOend" combination, or the "NACK_SN_Offset" field and the "SOstart+SOend" combination are no longer needed. Instructions.

It should be noted that, for the AMD PDU with some or all data loss, the SN offset of the AMD PDU or the SN of the AMD PDU is indicated in the STATUS PDU, and may be determined according to the length of the NACK_SN_Offset field. For example, if the number of bits occupied by the SN offset of the AMD PDU is less than or equal to the preset offset threshold, the NACK_SN_Offset field (ie, the first SN field) may be used to indicate the SN offset of the AMD PDU. If the number of bits occupied by the SN offset of the AMD PDU is greater than a preset offset threshold, the NACK_SN field (ie, the second SN field) may be used to indicate the SN of the AMD PDU. The preset offset threshold may be smaller than the length of the NACK_SN domain (ie, the second SN domain). In this way, the overhead of the STATUS PDU can be reduced.

Or, in another implementation manner, when the specific segment of the AMD PDU indicating partial data loss indicated by the “NACK SN range” field is used, the NACK_SN_Offset field (ie, the first SN domain) is used to indicate the SN bias of the AMD PDU. Transfer amount. That is, the AMD PDU corresponding to the NACK_SN_Offset field (ie, the first SN domain) is an AMD PDU or the like in which a part of data is lost in a plurality of consecutive AMD PDUs indicated by the "NACK SN range" field.

Or, in another implementation manner, when the number of bits occupied by the SN offset of the AMD PDU indicating that part of the data loss is indicated by the “NACK SN range” field is less than or equal to a preset offset threshold, the NACK_SN_Offset may be adopted. The domain (ie, the first SN domain) indicates the SN offset of the AMD PDU. If the number of bits occupied by the SN offset of the AMD PDU indicating that part of the data is lost is greater than the preset offset threshold, the NACK_SN domain (ie, the second SN domain) may be used to indicate the AMD PDU. SN.

In another implementation manner of the embodiment of the present application, the AMD PDU may also be segmented, and the number of AMD PDUs included in each segment is the same. The same STATUS PDU can report the reception of multiple segments. In the STATUS PDU, for the AMD PDU in each segment, the STATUS PDU structure described in the foregoing embodiment may be used to report the reception of the AMD PDU in the segment.

In this scenario, the SN offset of the AMD PDU corresponding to the NACK_SN_Offset field (ie, the first SN domain) is: the SN of the AMD PDU corresponding to the NACK_SN_Offset field (ie, the first SN domain) is relative to the previous one in the same segment. The offset of the SN of the AMD PDU with some or all of the data lost. Or the SN offset of the AMD PDU corresponding to the NACK_SN_Offset field (ie, the first SN domain) is: the SN of the AMD PDU corresponding to the NACK_SN_Offset field (ie, the first SN domain) is relative to the first existing part of the same segment or The offset of the SN of the AMD PDU for all data loss. Alternatively, the SN offset of the AMD PDU corresponding to the NACK_SN_Offset field (ie, the first SN domain) may be: the SN of the AMD PDU corresponding to the NACK_SN_Offset domain (ie, the first SN domain) is relative to the previous SN domain in the same segment. The offset of the SN of the corresponding AMD PDU. The previous SN domain may be the first SN domain or the second SN domain.

In addition, in the scenario, the STATUS PDU may be added with an indication field for indicating a segment, in addition to the indication field, for distinguishing which segment of the AMD PDU indicated in the STATUS PDU is received. Receiving situation. It should be noted that the indication field for indicating the segment may also be used to multiplex the existing indication field in the STATUS PDU, as long as it is an indication field that can be used to indicate the segment. In addition, the embodiment of the present application does not limit the location and layout of the indication field used to indicate the segment in the STATUS PDU.

In the information transmission method provided by the embodiment of the present application, the first device indicates the SN offset of the AMD PDU through the NACK_SN_Offset field of the STATUS PDU (ie, the first SN domain), and implicitly indicates the SN of the AMD PDU to the second device, due to the SN. The value of the offset is smaller than the value of the SN, so the number of bits indicating the SN offset is smaller than the number of bits indicating the SN. Therefore, the overhead of the STATUS PDU can be reduced in the case of the SN of the AMD PDU indicating the STATUS PDU flexibly.

It should be noted that the lengths of the various domains listed in the various embodiments provided by the present application in the STATUS PDU, and the location of each domain in the STATUS PDU are only one indication, and the foregoing embodiment does not Limited. It is only limited that the length of the above NACK_SN_Offset field is smaller than the length of the NACK_SN field.

In addition, although the indication field of the STATUS PDU provided by the embodiment of the present application has been described and described by using the above example, those skilled in the art may understand that, in specific implementation, the indication field in the foregoing STATUS PDU structure may also have other The form of expression, due to the limited length of the application documents, will not be repeated here.

FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 10, the communication device may include a processing module 11 and a transmitting module 12. among them,

The processing module 11 is configured to generate a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

The sending module 12 is configured to send the status report.

Optionally, in some embodiments, the sequence number offset of the data packet corresponding to the first sequence number field is: the sequence number of the data packet corresponding to the first sequence number field is lost relative to the previous one or all of the data. The offset of the sequence number of the data packet; or the sequence number offset of the data packet corresponding to the first sequence number field is: the sequence number of the data packet corresponding to the first sequence number field is relative to the first part of the data. An offset of the sequence number of the lost data packet; or the status report further includes at least one second sequence number field, each of the second sequence number fields indicating a sequence number of the data packet corresponding to each of the second sequence number fields; The sequence number offset of the data packet corresponding to the first sequence number field is: an offset of the sequence number of the data packet corresponding to the first sequence number field relative to the sequence number of the data packet corresponding to the previous sequence number field; The sequence number field is the first serial number field or the second serial number field.

Optionally, in some embodiments, the status report further includes at least one indication field. Each of the indication fields may correspond to one SN domain, or may correspond to a data packet in which part or all of the data is lost, and the like, and is used to indicate that the data packet corresponding to the indication domain is in the sequence number field in the status report.

For example, when the indication field is the first value, the sequence number field corresponding to the indication field is the first sequence number field, and when the indication field is the second value, it is used to indicate the The sequence number field corresponding to the indication domain is the second sequence number field.

For example, when the indication field is the third value in the value set, the sequence number field corresponding to the indication field is the first sequence number field, and the length of the first sequence number field is the a length corresponding to the third value, where the indication field is the fourth value, the sequence number field corresponding to the indication field is the second sequence number field, where the value set includes at least two The third value.

For example, when the indication field is the fifth value, the data packet corresponding to the sequence number of the data packet corresponding to the previous indication domain is not adjacent to the indication domain, and the data packet corresponding to the indication domain is not used. The serial number field is the first serial number field. The indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value; and when the indication field is a sixth value, it is used to indicate that the indication field is corresponding. The sequence number of the data packet is adjacent to the sequence number of the data packet corresponding to the previous indication field, and the data packet corresponding to the indication field has no sequence number field in the status report; when the indication field is the seventh value, The sequence number of the data packet corresponding to the indication field is the same as the sequence number of the data packet corresponding to the previous indication field, and the data packet corresponding to the indication domain has no sequence number field in the status report; The eighth value is used to indicate that the sequence number of the data packet corresponding to the indication field is not adjacent to the sequence number of the data packet corresponding to the previous indication field, and the sequence number field of the data packet corresponding to the indication domain is the Two serial number field.

Optionally, in some embodiments, the sequence number offset of the data packet corresponding to the first sequence number field is less than or equal to a preset offset threshold; and the sequence number offset of the data packet corresponding to the second sequence number field. Greater than the preset offset threshold.

Optionally, in some embodiments, the status report further includes: at least one sequence number range field, where each of the sequence number range fields is used to indicate a quantity of multiple data packets, where the multiple data packets are partially or All data is lost, and the plurality of data packets are a plurality of consecutive data packets. In this implementation manner, the data packet corresponding to the first sequence number field may be, for example, a data packet in which a part of data is lost in a plurality of consecutive data packets indicated by the sequence number range field.

The communication device provided by the embodiment of the present application may perform the action of the first device in the method embodiment shown in FIG. 4, and the implementation principle and the technical effect are similar, and details are not described herein again.

FIG. 11 is a schematic structural diagram of another communication device according to an embodiment of the present application. As shown in FIG. 11, the communication device may include: a receiving module 21, a processing module 22, and a transmitting module 23. among them,

The receiving module 21 is configured to receive a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

The processing module 22 is configured to retransmit the data packet corresponding to each of the first serial number fields by using the sending module 23 according to the status report.

The communication device provided by the embodiment of the present application may perform the operation of the second device in the method embodiment shown in FIG. 4, and the implementation principle and the technical effect are similar, and details are not described herein again.

It should be noted that, the actual implementation of the above sending module may be a transmitter, and the receiving module may be a receiver when actually implemented, and the processing module may be implemented by software in the form of processing component call or in hardware. For example, the processing module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above processing module. In addition, all or part of these modules can be integrated or implemented independently. The processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (digital) Singnal processor (DSP), or one or more Field Programmable Gate Array (FPGA). For another example, when one of the above modules is implemented in the form of a processing component scheduler code, the processing component may be a general purpose processor, such as a central processing unit (CPU) or other processor that can call the program code. As another example, these modules can be integrated and implemented in the form of a system-on-a-chip (SOC).

FIG. 12 is a schematic structural diagram of still another communication device according to an embodiment of the present application. As shown in FIG. 12, the communication device can include a processor 31 (e.g., a CPU) and a transmitter 34; a transmitter 34 coupled to the processor 31, and the processor 31 controlling the transmitting action of the transmitter 34. Optionally, the communication device involved in the embodiment of the present application may further include: a memory 32, a receiver 33, a power source 35, a communication bus 36, and a communication port 37. The memory 32 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the methods of embodiments of the present application. step. The receiver 33 and the transmitter 34 may be integrated in the transceiver of the communication device or may be a separate transceiver antenna on the communication device. Communication bus 36 is used to implement a communication connection between components. The communication port 37 is used to implement connection communication between the communication device and other peripheral devices.

In the embodiment of the present application, the processor 31 is configured to generate a status report, where the status report includes at least one first serial number field, and each of the first serial number fields indicates data corresponding to each of the first serial number fields. The sequence number offset of the packet; the sender 34 is configured to send the status report.

FIG. 13 is a schematic structural diagram of still another communication device according to an embodiment of the present application. As shown in FIG. 13, the communication device may include a processor 41 (for example, a CPU), a receiver 43 and a transmitter 44; a receiver 43 and a transmitter 44 are coupled to the processor 41, and the processor 41 controls reception of the receiver 43. The operation and processor 41 controls the transmission operation of the transmitter 44. Optionally, the communication device involved in the embodiment of the present application may further include: a memory 42, a power source 45, a communication bus 46, and a communication port 47. The memory 42 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the methods of embodiments of the present application. step. Receiver 43 and transmitter 44 may be integrated into the transceiver of the communication device or may be separate transmit and receive antennas on the communication device. Communication bus 46 is used to implement a communication connection between components. The communication port 47 is used to implement connection communication between the communication device and other peripheral devices.

In the embodiment of the present application, the receiver 43 is configured to receive a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a data packet corresponding to each of the first sequence number fields. The sequence number offset is used by the processor 41, for retransmitting the data packet corresponding to each of the first sequence number fields by the transmitter 44 according to the status report.

The communication device provided by the embodiment of the present application may perform the action of the second device in the method embodiment shown in FIG. 4, and the implementation principle and the technical effect are similar, and details are not described herein again.

The embodiment of the present application further provides a chip, including a processor and an interface. The interface is used for data or instructions processed by the input and output processors. The processor is operative to perform the methods provided in the above method embodiments. The chip can be applied to both the first device and the second device.

The embodiment of the present application further provides a program, when executed by a processor, is used to execute the method provided by the foregoing method embodiment.

The embodiment of the present application further provides a program product, such as a computer readable storage medium, in which instructions are stored, and when executed on a computer, cause the computer to execute the method provided by the foregoing method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, computer instructions can be wired from a website site, computer, server or data center (eg Coax, fiber, digital subscriber line (DSL) or wireless (eg, infrared, wireless, microwave, etc.) is transmitted to another website, computer, server, or data center. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. Useful media can be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)).

Claims

An information transmission method, comprising:

The first device generates a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of each data packet corresponding to the first sequence number field;

The first device sends the status report to a second device.
The method according to claim 1, wherein the sequence number offset of the data packet corresponding to the first sequence number field is: the sequence number of the data packet corresponding to the first sequence number field is partially or completely relative to the previous one. The offset of the sequence number of the data packet that was lost; or,

The sequence number offset of the data packet corresponding to the first sequence number field is: an offset of the sequence number of the data packet corresponding to the first sequence number field with respect to the sequence number of the first data packet in which part or all of the data is lost; or,

The status report further includes at least one second serial number field, each of the second serial number fields indicating a sequence number of a data packet corresponding to each of the second serial number fields; and a serial number of the data packet corresponding to the first serial number field The shift amount is: an offset of a sequence number of the data packet corresponding to the first sequence number field with respect to a sequence number of the data packet corresponding to the previous sequence number field; the previous sequence number field is the first sequence number field or the first Two serial number field.
The method of claim 2 wherein said status report further comprises at least one indication field;

When the indication field is the first value, the sequence number field corresponding to the indication field is the first sequence number field, and when the indication field is the second value, it is used to indicate the indication field. The corresponding sequence number field is the second sequence number field.
The method of claim 2 wherein said status report further comprises at least one indication field;

When the indication field is the third value in the value set, the sequence number field corresponding to the indication field is the first sequence number field, and the length of the first sequence number field is the third The value corresponding to the value, when the indication field is the fourth value, the sequence number field corresponding to the indication field is the second sequence number field, where the value set includes at least two thirds Value.
The method of claim 2 wherein said status report further comprises at least one indication field;

When the indication field is the fifth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the sequence number of the data packet corresponding to the indication domain is not used. The domain is the first serial number field;

The indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value;

When the indication field is the sixth value, the sequence number of the data packet corresponding to the indication domain is adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no serial number field in the status report;

When the indication field is the seventh value, the sequence number of the data packet corresponding to the indication domain is the same as the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no sequence number field in the status report;

When the indication field is the eighth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is The sequence number field is the second sequence number field.
The method according to any one of claims 2 to 5, wherein the sequence number offset of the data packet corresponding to the first sequence number field is less than or equal to a preset offset threshold; the second sequence number field corresponds to The sequence number offset of the packet is greater than the preset offset threshold.
The method according to any one of claims 2-6, wherein the status report further comprises: at least one sequence number range field, wherein each of the sequence number range fields is used to indicate a quantity of a plurality of data packets, Some or all of the data is lost in multiple data packets, and the multiple data packets are multiple consecutive data packets.
The method according to claim 7, wherein the data packet corresponding to the first serial number field is a data packet in which a plurality of consecutive data packets indicated by the serial number range field are partially lost.
An information transmission method, comprising:

The second device receives a status report sent by the first device, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields. ;

The second device retransmits the data packet corresponding to each of the first sequence number domains to the first device according to the status report.
The method according to claim 9, wherein the sequence number offset of the data packet corresponding to the first sequence number field is: the sequence number of the data packet corresponding to the first sequence number field is partially or completely relative to the previous one. The offset of the sequence number of the data packet that was lost; or,

The sequence number offset of the data packet corresponding to the first sequence number field is: an offset of the sequence number of the data packet corresponding to the first sequence number field with respect to the sequence number of the first data packet in which part or all of the data is lost; or,

The status report further includes at least one second serial number field, each of the second serial number fields indicating a sequence number of a data packet corresponding to each of the second serial number fields; and a serial number of the data packet corresponding to the first serial number field The shift amount is: an offset of a sequence number of the data packet corresponding to the first sequence number field with respect to a sequence number of the data packet corresponding to the previous sequence number field; the previous sequence number field is the first sequence number field or the first Two serial number field.
The method of claim 10 wherein said status report further comprises at least one indication field;

When the indication field is the first value, the sequence number field corresponding to the indication field is the first sequence number field, and when the indication field is the second value, it is used to indicate the indication field. The corresponding sequence number field is the second sequence number field.
The method of claim 10 wherein said status report further comprises at least one indication field;

When the indication field is the third value in the value set, the sequence number field corresponding to the indication field is the first sequence number field, and the length of the first sequence number field is the third The value corresponding to the value, when the indication field is the fourth value, the sequence number field corresponding to the indication field is the second sequence number field, where the value set includes at least two thirds Value.
The method of claim 10 wherein said status report further comprises at least one indication field;

When the indication field is the fifth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the sequence number of the data packet corresponding to the indication domain is not used. The domain is the first serial number field;

The indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value;

When the indication field is the sixth value, the sequence number of the data packet corresponding to the indication domain is adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no serial number field in the status report;

When the indication field is the seventh value, the sequence number of the data packet corresponding to the indication domain is the same as the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no sequence number field in the status report;

When the indication field is the eighth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is The sequence number field is the second sequence number field.
The method according to any one of claims 10 to 13, wherein the sequence number offset of the data packet corresponding to the first sequence number field is less than or equal to a preset offset threshold; the second sequence number field corresponds to The sequence number offset of the packet is greater than the preset offset threshold.
The method according to any one of claims 10 to 14, wherein the status report further comprises: at least one sequence number range field, wherein each of the sequence number range fields is used to indicate a quantity of a plurality of data packets, Some or all of the data is lost in multiple data packets, and the multiple data packets are multiple consecutive data packets.
The method according to claim 15, wherein the data packet corresponding to the first sequence number field is a data packet in which a part of data is lost in a plurality of consecutive data packets indicated by the sequence number range field.
A communication device, characterized in that the communication device comprises:

a processor, configured to generate a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

A sender for transmitting the status report.
The communication device according to claim 17, wherein the sequence number offset of the data packet corresponding to the first sequence number field is: the sequence number of the data packet corresponding to the first sequence number field is relative to the previous presence portion or The offset of the sequence number of all data lost packets; or,

The sequence number offset of the data packet corresponding to the first sequence number field is: an offset of the sequence number of the data packet corresponding to the first sequence number field with respect to the sequence number of the first data packet in which part or all of the data is lost; or,

The status report further includes at least one second serial number field, each of the second serial number fields indicating a sequence number of a data packet corresponding to each of the second serial number fields; and a serial number of the data packet corresponding to the first serial number field The shift amount is: an offset of a sequence number of the data packet corresponding to the first sequence number field with respect to a sequence number of the data packet corresponding to the previous sequence number field; the previous sequence number field is the first sequence number field or the first Two serial number field.
The communication device according to claim 18, wherein said status report further comprises at least one indication field;

When the indication field is the first value, the sequence number field corresponding to the indication field is the first sequence number field, and when the indication field is the second value, it is used to indicate the indication field. The corresponding sequence number field is the second sequence number field.
The communication device according to claim 18, wherein said status report further comprises at least one indication field;

When the indication field is the third value in the value set, the sequence number field corresponding to the indication field is the first sequence number field, and the length of the first sequence number field is the third The value corresponding to the value, when the indication field is the fourth value, the sequence number field corresponding to the indication field is the second sequence number field, where the value set includes at least two thirds Value.
The communication device according to claim 18, wherein said status report further comprises at least one indication field;

When the indication field is the fifth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the sequence number of the data packet corresponding to the indication domain is not used. The domain is the first serial number field;

The indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value;

When the indication field is the sixth value, the sequence number of the data packet corresponding to the indication domain is adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no serial number field in the status report;

When the indication field is the seventh value, the sequence number of the data packet corresponding to the indication domain is the same as the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no sequence number field in the status report;

When the indication field is the eighth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is The sequence number field is the second sequence number field.
The communication device according to any one of claims 18 to 21, wherein the sequence number offset of the data packet corresponding to the first sequence number field is less than or equal to a preset offset threshold; the second sequence number field The sequence number offset of the corresponding data packet is greater than the preset offset threshold.
The communication device according to any one of claims 18 to 22, wherein the status report further comprises: at least one sequence number range field, wherein each of the sequence number range fields is used to indicate the number of the plurality of data packets, There are some or all of the data loss in the plurality of data packets, and the plurality of data packets are a plurality of consecutive data packets.
A communication device, characterized in that the communication device comprises:

a receiver, configured to receive a status report, where the status report includes at least one first sequence number field, and each of the first sequence number fields indicates a sequence number offset of a data packet corresponding to each of the first sequence number fields;

And a processor, configured to retransmit, according to the status report, a data packet corresponding to each of the first sequence number domains by using a transmitter.
The communication device according to claim 24, wherein the sequence number offset of the data packet corresponding to the first serial number field is: the serial number of the data packet corresponding to the first serial number field is relative to the previous existing portion or The offset of the sequence number of all data lost packets; or,

The sequence number offset of the data packet corresponding to the first sequence number field is: an offset of the sequence number of the data packet corresponding to the first sequence number field with respect to the sequence number of the first data packet in which part or all of the data is lost; or,

The status report further includes at least one second serial number field, each of the second serial number fields indicating a sequence number of a data packet corresponding to each of the second serial number fields; and a serial number of the data packet corresponding to the first serial number field The shift amount is: an offset of a sequence number of the data packet corresponding to the first sequence number field with respect to a sequence number of the data packet corresponding to the previous sequence number field; the previous sequence number field is the first sequence number field or the first Two serial number field.
The communication device according to claim 25, wherein said status report further comprises at least one indication field;

When the indication field is the first value, the sequence number field corresponding to the indication field is the first sequence number field, and when the indication field is the second value, it is used to indicate the indication field. The corresponding sequence number field is the second sequence number field.
The communication device according to claim 25, wherein said status report further comprises at least one indication field;

When the indication field is the third value in the value set, the sequence number field corresponding to the indication field is the first sequence number field, and the length of the first sequence number field is the third The value corresponding to the value, when the indication field is the fourth value, the sequence number field corresponding to the indication field is the second sequence number field, where the value set includes at least two thirds Value.
The communication device according to claim 25, wherein said status report further comprises at least one indication field;

When the indication field is the fifth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the sequence number of the data packet corresponding to the indication domain is not used. The domain is the first serial number field;

The indication field further includes at least one of the following values: a sixth value, a seventh value, and an eighth value;

When the indication field is the sixth value, the sequence number of the data packet corresponding to the indication domain is adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no serial number field in the status report;

When the indication field is the seventh value, the sequence number of the data packet corresponding to the indication domain is the same as the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is in the There is no sequence number field in the status report;

When the indication field is the eighth value, the sequence number of the data packet corresponding to the indication domain is not adjacent to the sequence number of the data packet corresponding to the previous indication domain, and the data packet corresponding to the indication domain is The sequence number field is the second sequence number field.
The communication device according to any one of claims 25 to 28, wherein the sequence number offset of the data packet corresponding to the first sequence number field is less than or equal to a preset offset threshold; the second sequence number field The sequence number offset of the corresponding data packet is greater than the preset offset threshold.
The communication device according to any one of claims 25 to 29, wherein the status report further comprises: at least one sequence number range field, wherein each of the sequence number range fields is used to indicate the number of the plurality of data packets, There are some or all of the data loss in the plurality of data packets, and the plurality of data packets are a plurality of consecutive data packets.