WO2014075284A1

WO2014075284A1 - Data retransmission and feedback methods, and corresponding apparatus

Info

Publication number: WO2014075284A1
Application number: PCT/CN2012/084726
Authority: WO
Inventors: 王芸
Original assignee: 华为技术有限公司
Priority date: 2012-11-16
Filing date: 2012-11-16
Publication date: 2014-05-22
Also published as: CN103999394B; CN103999394A

Abstract

The present invention relates to data retransmission and feedback methods, and a corresponding apparatus. The method comprises: receiving data sent by a data sending end on a wireless link; sending a status report to the data sending end when the received data comprises an incomplete data packet and a wireless resource is restricted, wherein the status report comprises a receiving sequence number and a retransmission request sequence number; when there is one incomplete data packet, the receiving sequence number is a sequence number of a first data packet that is not received after the received data packet and the retransmission request sequence number is the sequence number of the incomplete data packet; when there are two or more incomplete data packets, the receiving sequence number is the sequence number of a data packet with a second-small sequence number among the two or more incomplete data packets and the retransmission request sequence number is the sequence number of the data packet with the smallest sequence number among the two or more incomplete data packets. This ensures that data transmission continues, avoids wireless link expiration, and ensures session continuity.

Description

Data retransmission, feedback method, and corresponding device

TECHNICAL FIELD The present invention relates to wireless communication technologies, and more particularly to a data retransmission, feedback method, and corresponding apparatus.

Background technique

In the retransmission mechanism of the Radio Line Control (RLC) protocol, after the data transmitting end sends data, it waits for the data receiving end to return a status report. When the data receiving end successfully receives all the data sent by the data transmitting end, the status report returned by the data receiving end gives the serial number of the last received data packet, and the data receiving end sends a status report requiring 2 bytes of wireless. Resources. When the data receiving end does not successfully receive all the data sent by the data transmitting end, the status report returned by the data receiving end not only gives the serial number of the last received data packet, but also gives the serial number of the incomplete data packet and the The location information of the specific data segment lost in the incomplete data packet. At this time, the data receiving end needs to transmit at least 8 bytes of radio resources. For the case where there is data loss and the radio resources are limited (for example, 8 bytes are not enough), the current protocol policy is to carry only the serial number information of the last received data packet. In this scenario, the data sending end will always be The data receiving end is required to return a status report, and the data receiving end can only bring back the last received data packet information because the resource of the group status report is limited, and finally the RLC reaches the maximum number of retransmissions, causing the wireless link to be invalid. User equipment (UE) session dropped calls.

Summary of the invention

In view of this, the embodiments of the present invention provide a data retransmission and feedback method, and a corresponding device, to prevent a wireless link from failing in case of data loss and limited radio resources. In a first aspect, an embodiment of the present invention provides a data feedback method, including: Receiving data sent by the data transmitting end on the wireless link; when the received data includes an incomplete data packet and the wireless resource is limited, sending a status report to the data sending end, where the status report includes the receiving sequence number and Requesting a retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is a sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the The serial number of the complete data packet; or when there are two or more incomplete data packets, the receiving sequence number is the second smallest data packet of the two or more incomplete data packets. The sequence number is the sequence number of the data packet with the smallest sequence number among the two or more incomplete data packets. In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the status report further includes one or more of the following fields:

The data control indication bit D/C field, the control protocol data unit type CPT field, the first code stream end indication bit E1 field, and the second code stream end indication bit E2 field.

In a second aspect, an embodiment of the present invention provides a data retransmission method, including: sending data to a data receiving end by using a wireless link; and receiving, by the data receiving end, the received data includes an incomplete data packet and the wireless resource is subjected to a status report returned in a limited time, the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is the first one that is not received after the received data packet The sequence number of the data packet, the request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two or more incomplete data packets, the receiving sequence number is the two or two The sequence number of the second smallest data packet in the incomplete data packet, wherein the request retransmission sequence number is a sequence number of the data packet with the smallest sequence number among the two or more incomplete data packets; The receiving end sends the data packet corresponding to the request retransmission sequence number.

In conjunction with the second aspect, in a first possible implementation of the second aspect, the status report further includes one or more of the following fields:

The data control indication bit D/C field, the control protocol data unit type CPT field, the first code stream end indication bit E1 field, and the second code stream end indication bit E2 field. In a third aspect, an embodiment of the present invention provides a data feedback apparatus, including: a data receiving module, configured to receive data sent by a data sending end on a wireless link; a feedback module, configured to send a status report to the data sending end when the received data includes an incomplete data packet and the radio resource is limited, where the status includes receiving a sequence number and requesting a retransmission sequence number; wherein, when incomplete When the data packet has one, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the sequence number of the incomplete data packet; or when not When there are two or more complete data packets, the receiving sequence number is a sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number is The sequence number of the first unreceived packet after the sequence number of the smallest sequence number of the two or more incomplete data packets. With reference to the third aspect, in a first possible implementation manner of the third aspect, the status report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field The first code stream end indication bit E1 field and the second code stream end indication bit Ε 2 field. According to a fourth aspect, an embodiment of the present invention provides a data retransmission apparatus, including: a data sending module, configured to send data to a data receiving end by using a wireless link; and a report receiving module, configured to receive the data receiving end to receive The data includes an incomplete data packet and a status report returned when the radio resource is limited, the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is The sequence number of the first unreceived data packet after the received data packet, the request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two or more incomplete data packets, The receiving sequence number is a sequence number of the second smallest data packet in the two or more incomplete data packets, and the request retransmission sequence number is in the two or more incomplete data packets. The sequence number of the first unreceived packet after the sequence number of the smallest packet;

The data sending module is further configured to send, to the data receiving end, the data packet corresponding to the request retransmission sequence number.

In a fifth aspect, an embodiment of the present invention provides a user equipment, including: a memory and a processor connected to the memory, where the memory stores a set of program codes, and the processor is used to invoke the memory. The stored program code, performs the data feedback method as described above, or performs the data retransmission method as described above. According to a sixth aspect, an embodiment of the present invention provides a base station, including: a memory and a processor connected to the memory, where the memory stores a set of program codes, and the processor is configured to invoke the storage in the memory. The program code, performing the data feedback method as described above, or performing the data retransmission method as described above. In a seventh aspect, an embodiment of the present invention provides a computer program product, including a computer readable medium, the readable medium comprising a set of program codes, configured to perform a data feedback method as described above, or for performing data as described above Retransmission method. Through the foregoing solution, when the received data includes incomplete data packets and the radio resources are limited, the data receiving end returns a status report including the receiving sequence number and the request retransmission sequence number, so that the data transmitting end can learn the lost data. The information retransmits the lost data to the receiving end, ensuring the continuation of the data transmission, avoiding the failure of the wireless link and ensuring the continuity of the session.

DRAWINGS

FIG. 1 is a flowchart of a data feedback method according to an embodiment of the present invention;

2 is a schematic diagram showing the format of a status report in the embodiment shown in FIG. 1;

FIG. 3 is a flowchart of a data retransmission method according to an embodiment of the present invention;

4 is a schematic structural diagram of a data feedback apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a data retransmission device according to an embodiment of the present disclosure;

FIG. 6 is a structural block diagram of a user equipment according to an embodiment of the present invention;

FIG. 7 is a structural block diagram of a base station according to an embodiment of the present invention.

1 is a flowchart of a data feedback method according to an embodiment of the present invention. This embodiment is a processing method of the data receiving end. As shown in FIG. 1 , the method includes: Step 11: Receive data sent by a data sending end on a wireless link. For example, the UE receives the data sent by the base station. Correspondingly, the base station is the data transmitting end, and the UE is the data receiving end. For example, the base station receives the data sent by the UE, and correspondingly, the UE is the data transmitting end, the base station is the data receiving end, and the like. Step 12: When the received data includes an incomplete data packet and the radio resource is limited, send a status report to the data sending end, where the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when the incomplete data packet has At one time, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the sequence number of the incomplete data packet; or when the incomplete data packet has two or When two or more, the receiving sequence number is the sequence number of the second smallest data packet in the two or more incomplete data packets, and the request retransmission sequence number is the two or more incomplete data packets. The serial number of the packet with the lowest sequence number. The unreceived data packet described here means that the entire data packet is not received, and the incomplete data packet means that some of the fields in the data packet are not received.

The radio resource limitation refers to a situation in which the radio resource is insufficient to support the ACK_SN field and the NACK_SN field is co-transmitted with the SO packet, that is, not enough to carry a NACK-SN field and one while carrying an ACK SN. The case of data segmentation (SO) information. For example, the data receiving end receives n data packets with sequence numbers 0 ~ η-1, and if a data segment in the data packet with sequence number n-2 (ie, packet n-2) is not received, the data packet N-2 is an incomplete packet. For example, in packet n-2, the data segment ml ~ m2 (where ml is the starting position of the segment not received, m2 is the cutoff position of the segment not received), at this time, if the wireless resource is not Limit, the fields in the status report are filled in as follows:

ACK SN: n

NACK — SN: n-2

SOStart: ml

SoEnd: m2

In the case of limited resources, the prior art only fills in the ACK information, that is, the fields filled in are as follows: ACK SN: n-2, indicating that the data packets before n-2 are received, excluding n-2. In the case of limited resources, after using the technical solution provided in the above embodiment, the fields filled in are as follows: ACK SN: n

NACK — SN: n-2.

For another example, suppose that the data receiving end receives n data packets with sequence numbers 0 ~ nl, if multiple data segments in the data packet with sequence number n-3 (ie, packet n-3) are not received, such as data. The data segment ml ~ m2 in the packet n-3, the data segment m3 ~ m4 are lost, at this time, the wireless resources are not In the case of a limit, the fields in the status report are filled in as follows:

ACK SN: n

NACK SN: n-3

SOStart: ml

SOEnd: m2

NACK_SN: n-3

SOStart: m3

SOEnd: If there are multiple segments received by m4, the status report requires more resources. If the resources are limited, the existing technology only fills in the ACK information, that is, the fields filled in are as follows:

ACK SN: η-3 , indicating that all packets before n-3 are received, excluding n-3. If the resource is limited, after using the technical solution provided in the above embodiment, the fields filled in are as follows: ACK SN: n

NACK SN: n-3.

For another example, suppose that the data receiving end receives n data packets with sequence numbers 0 ~ nl, if the data segment of the sequence number n-1 data packet (ie, packet n-1) is not received, the data packet is not received. The data segment m3 ~ m4 in n-3 is not received. At this time, in the case where the resource is not limited, the fields in the status report are filled in as follows:

ACK SN: n

NACK SN: n-3

SOStart: m3

SOEnd: m4

NACK SN: n-1

SOStart: ml

SOEnd: m2. In the case where the radio resources are limited, the prior art only fills in the ACK information, and after using the technical solution provided by the embodiment of the present invention, the fields filled in are as follows:

ACK SN: n-1

NACK SN: n-3. For another example, suppose that the data receiving end receives n data packets with sequence numbers 0 ~ nl, if the data segment of the sequence number n-1 data packet (ie, packet n-1) is not received, the data packet is not received. The data segment m5 ~ m6 in n-2 is not received, and the data segment m3 ~ m4 in packet n-3 is not received. At this time, when the resource is satisfied, the fields in the status report are filled in as follows: :

ACK SN: n

NACK SN: n-3

SOStart: m3

SOEnd: m4

NACK SN: n-2

SOStart: m5

SOEnd: m6

NACK SN: n-1

SOStart: ml

SOEnd: m2.

In the case where the radio resources are limited, the prior art only fills in the ACK information, and after using the technical solution provided by the embodiment of the present invention, the fields filled in are as follows:

ACK SN: n-2

NACK SN: n-3.

Optionally, the foregoing status report may further include one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. The D/C field is used to indicate that the current Radio Link Control (RLC) Protocol Data Unit (PDU) is a Control PDU. The status report is also an RLC PDU and belongs to the RLC Control PDU.

The CPT field, currently reserved as a status report.

The ACK SN field is used to acknowledge the PDU before the ACK SN, indicating that all the previous PDUs of the PDU whose SN is the ACK SN have been successfully received.

The E1 field is used to indicate if there is still information behind.

The NACK-SN field is used to indicate the order in which the incomplete packet is detected after the receiver receives the data. number. The sequence number of the incomplete data packet may be the serial number (SN) of the RLC PDU that is lost in part of the data segment.

The E2 field is used to indicate whether there is a starting position (SOstart) field and an ending position (SOend) field of the missing part in the incomplete packet (that is, the packet corresponding to the request retransmission sequence number). For example, the status report includes a ACK_SN field and a NACK_SN field, and a D/C field, which is used to indicate that the status report is an RLC PDU and belongs to the RLC control PDU.

For example, the foregoing status report may further include a CPT field, which is a reserved field, and may use this field to implement functions such as indicating the type of the control PDU of the RLC. The embodiments of the present invention are not limited in any way, and those skilled in the art can utilize this field as needed. In addition, the foregoing status report may further include an E1 field and an E2 field, where the E1 field is used to indicate the end of the ACK_SN field and the NACK_SN field, and the E2 field is used to indicate the end of the entire status report.

For example, the above status report may include: a D/C field, a CPT field, an ACK_SN field, an E1 field, a NACK_SN field, an E1 field, and an E2 field. Optionally, the method provided in this embodiment may also carry ACK_SN, D/C, CPT, El, E2, and the like in the case that the status report includes a NACK-SN, so that the technical solution provided by the present invention is provided. Easy to implement. As shown in FIG. 2, in the foregoing status report, the D/C field occupies 1 bit, the CPT field occupies 3 bits, the ACK_SN field occupies 10 bits, and each E1 field occupies 1 bit, and the NACK_SN field occupies 10 bits, the E2 field occupies 1 bit. For example, when the value of one bit in the D/C field is 0, the current PDU is the control PDU of the RLC, and when it is 1, the current PDU is the data PDU of the RLC. For example, when 3 bits in the CPT field are 000, it indicates that the current PDU is a status PDU (STATUS PDU), that is, a status report. If the value of 1 bit in the E1 field is 1, it indicates that there is a NACK_SN field, an E1 field and an E2 field. When one bit value in the E1 field is 0, it means that there is no other information behind the E1 field. , the status report has ended. If the value of one bit in the E2 field is 1, it means that there is a Sostart field and a SOend field. When the value of one bit in the E2 field is 0, there is no information behind, and the content of the current PDU has ended. When the data received by the receiving end is lost and the radio resource is less than 8 bytes, the status report shown in FIG. 2 only needs 4 bytes to enable the transmitting end to resend the unsuccessfully received PDU, which solves the prior art. Can only send status reports containing only ACK-SN The resulting wireless link failure problem ensures the continuity of the session. In the data feedback method provided by the embodiment, when the data received by the data receiving end is incomplete and the radio resource is limited, the receiving end of the receiving data returns a status report including the receiving sequence number and the request retransmission sequence number, which avoids In the case that the data reception is incomplete and the resources are insufficient, the data receiving end returns a status report containing only the receiving sequence number: The data transmitting end continuously sends a request to return a status report, and the data receiving end repeatedly returns a status report containing only the receiving sequence number. The problem that the RLC reaches the maximum number of retransmissions, thereby causing the wireless link to fail. For example, when the uplink and downlink of the radio link are simultaneously degraded, the UE has a lost RLC PDU SN=179. When the base station retransmits the PDU, since the downlink wireless environment has deteriorated, most of the cases cannot be sent out at one time, and multiple segments are required to be retransmitted. A large number of re-segments occur depending on the PDU size of the last packet. If the re-segmented part is lost and the UE requests retransmission again, the generated status report requires more uplink resources for grouping because it adds the offset fields SOstart and SOend. Both SOstart and SOend belong to the SO field. If the uplink resource limitation occurs continuously for a period of time, the UE still cannot return the status report including the NACK-SN and SO fields. The base station does not trigger the retransmission according to the 36.322 RLC protocol because the last PDU of the transmitted data is not received. However, the base station continuously sends a request to the UE to return the status report information until the UE returns the NACK-SN field. And the status report of the SO field ("SOstart", "SOend", see 36.322 RLC protocol), causing the RLC to reach the maximum number of retransmissions and failing, causing the UE to drop. After the technical solution provided by this embodiment is used, when the UE side groups the packet, if the resource is limited, the status report group packet is sent in the form of one ACK_SN and one NACK-SN as shown in FIG. 2, and is sent. To the base station, the base station can learn the sequence number of the lost PDU after the SN is the ACK_SN PDU, so that the lost PDU is retransmitted according to the NACK-SN, and the wireless link failure caused by the invalid multiple retransmission is avoided. The problem is that the speed of data transmission is improved, and the continuity of the wireless link and the UE session is guaranteed.

The UE saves the SN that the base station retransmits as the PDU of the NACK-SN to ensure that the link is continuous. Moreover, after successfully receiving the PDU whose SN is a NACK_SN, the UE returns a new status report to the base station. The ACK-SN in the new status report changes to update the data reception. FIG. 3 is a flowchart of a data retransmission method according to an embodiment of the present invention. This embodiment and figure Corresponding to the embodiment shown in Fig. 1, it is a processing method of the data transmitting end. As shown in FIG. 3, the method includes: Step 31: Send data to a data receiving end by using a wireless link. For example, the UE sends data to the base station, and correspondingly, the base station is a data receiving end; and, for example, the base station sends data to the UE, and correspondingly, the UE is a data receiving end, and the like. Step 32: Receive the foregoing data receiving end to return a status report when the received data includes an incomplete data packet and the radio resource is limited, where the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when the incomplete data packet has At one time, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two incomplete data packets Or two or more, the receiving sequence number is a sequence number of the second smallest data packet of the two or more incomplete data packets, and the request retransmission sequence number is the two or more incomplete data. The sequence number of the packet with the lowest sequence number in the packet. Optionally, the state 4 report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. The status report is described in detail in the embodiment shown in FIG. 1 above.

Step 33: Send, to the data receiving end, the data packet corresponding to the request retransmission sequence number.

For example, the base station learns from the status report that the transmitted data loses the PDU whose SN is NACK_SN, and then retransmits the PDU that is the NACK_SN of the SN to the UE, or for example, the UE learns from the status report that the transmitted data is lost, and the SN is NACK_SN. The PDU, and then retransmits the PDU with the SN being NACK_SN to the base station.

The data retransmission method provided in this embodiment is matched with the embodiment shown in FIG. 1. The data sending end receives the status report including the receiving sequence number and the request retransmission sequence number returned by the data receiving end, and resends the sequence number as the request retransmission. The serial number data ensures that the data transmission can continue in the case of as few radio resources as possible, which reduces the radio resource requirements of the UE session and improves the continuity of the UE session.

FIG. 4 is a schematic structural diagram of a data feedback apparatus according to an embodiment of the present invention. The device provided in this embodiment is used to implement the method provided in the embodiment shown in FIG. 1 and is located at the data receiving end, and may be a UE, a base station, or the like. As shown in FIG. 4, the device includes: a data receiving module 41 and a feedback module 42. The data receiving module 41 is configured to receive data sent by the data sending end on the wireless link, and the feedback module 42 is configured to send the data to the data when the data received by the data receiving module 41 includes an incomplete data packet and the radio resource is limited. The terminal sends a status report, where the status includes the receiving sequence number and the request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet The request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two or more incomplete data packets, the receiving sequence number is the sequence number in the two or more incomplete data packets. The sequence number of the second small data packet, the request retransmission sequence number is the sequence number of the data packet with the smallest sequence number among the two or more incomplete data packets, and the details are shown in the embodiment shown in FIG. Optionally, the state 4 report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. For example, the foregoing status report includes: a D/C field, a CPT field, an ACK_SN field, an E1 field, a NACK_SN field, an E1 field, and an E2 field. Optionally, the foregoing D/C field occupies 1 bit, the CPT field occupies 3 bits, the ACK_SN field occupies 10 bits, each E1 field occupies 1 bit, and the NACK_SN field occupies 10 bits, and the E2 field Take 1 bit. The data feedback device provided in this embodiment returns a status report including the receiving sequence number and the request retransmission sequence number, so that the data transmitting end can learn, if the received data includes an incomplete data packet and the radio resources are insufficient. The lost data information, so that the lost data is resent to the data receiving end, ensures the data transmission continues, avoids link failure, and guarantees the continuity of the session. FIG. 5 is a schematic structural diagram of a data retransmission device according to an embodiment of the present invention. The device provided in this embodiment is used to implement the method provided in the embodiment shown in FIG. 3, and is located at a data sending end, and may be a base station, a UE, or the like. As shown in FIG. 5, the apparatus includes: a data sending module 51 and a report receiving module 52. The data sending module 51 is configured to send data to the data receiving end through the wireless link. The report receiving module 52 is configured to receive a status report returned by the data receiving end when the received data includes an incomplete data packet and the radio resource is limited, where the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when incomplete When there is one data packet, the receiving sequence number is the first one after the received data packet. The sequence number of the received data packet, the request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two or more incomplete data packets, the receiving sequence number is the two or more The serial number of the second smallest data packet in the complete data packet, and the request retransmission sequence number is the serial number of the smallest data packet among the two or more incomplete data packets, as shown in FIG. The description in the example. The data sending module 52 is further configured to send, to the data receiving end, a data packet corresponding to the request retransmission sequence number.

The data retransmission device provided in this embodiment cooperates with the embodiment shown in FIG. 4, and receives a status report including a receiving sequence number and a request retransmission sequence number received by the report receiving module, and resends the sequence number by the data sending module to the request. The data packet of the sequence number ensures that the data transmission can continue under the condition that the radio resources are as small as possible, which reduces the requirement of the radio resources of the UE session and improves the continuity of the UE session. Embodiments of the present invention further provide an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments. The embodiments of the present invention are applicable to a base station or a UE in various communication systems. FIG. 6 is a structural block diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 6, the user equipment includes a memory 61 and a processor 62 coupled to the memory 61. Wherein, when the user equipment is the data receiving end, the first group of program codes are stored in the memory 61, and the processor 62 is configured to call the program code stored in the memory 61 to perform the steps in the method shown in FIG. 1: The data sent by the data sending end on the road is received; when the received data includes an incomplete data packet and the radio resource is limited, the status report is sent to the data sending end, where the status report includes the receiving sequence number and the request retransmission sequence number; Wherein, when there is one incomplete data packet, the receiving sequence number is a sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is a sequence number of the incomplete data packet; or When there are two or more incomplete data packets, the receiving sequence number is the sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number is the two The sequence number of the smallest sequence number of one or more incomplete data packets. Optionally, the state 4 report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. For example, the status report contains: Data control indication bit D/C field, control protocol data unit type CPT field, reception sequence number ACK_SN field, first code stream end indication bit E1 field, request retransmission sequence number NACK_SN field, E1 field, and second code stream End indicator bit E2 field. When the user equipment is the data transmitting end, the second group of program codes are stored in the memory 61, and the processor 62 is configured to call the program code stored in the memory 61 to perform the steps in the method shown in FIG. 3:

Transmitting data to the data receiving end through the wireless link; receiving a status 4 report that the data receiving end returns when the received data includes an incomplete data packet and the radio resource is limited, and the status report includes receiving the sequence number and requesting retransmission No.; wherein, when there is one incomplete data packet, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the sequence number of the incomplete data packet. Or when there are two or more incomplete data packets, the receiving sequence number is the sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number is The sequence number of the data packet with the smallest sequence number among the two or more incomplete data packets; and the data packet corresponding to the request retransmission sequence number is sent to the data receiving end.

Optionally, the state 4 report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. FIG. 7 is a functional block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 7, the base station includes a memory 71 and a processor 72 coupled to the memory 71.

Wherein, when the base station is the data receiving end, the first set of program codes is stored in the memory 71, and the processor 72 is configured to call the program code stored in the memory 71 to perform the steps in the method shown in FIG. 1 above:

Receiving data sent by the data transmitting end on the wireless link; when the received data includes an incomplete data packet and the wireless resource is limited, sending a status report to the data sending end, where the status report includes receiving sequence number and request weight The serial number; wherein, when there is one incomplete data packet, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the incomplete data packet. Serial number; or when incomplete When there are two or more data packets, the receiving sequence number is the sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number is the two or two. The sequence number of the smallest packet in the above incomplete packet.

Optionally, the status report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. For example, the status report contains:

Data control indication bit D/C field, control protocol data unit type CPT field, reception sequence number ACK_SN field, first code stream end indication bit E1 field, request retransmission sequence number NACK_SN field, E1 field, and second code stream End indicator bit E2 field. When the base station is the data transmitting end, the second set of program codes is stored in the memory 71, and the processor 72 is configured to call the program code stored in the memory 71 to perform the steps in the method shown in FIG. 3: transmitting data through the wireless link. Receiving a data receiving end; receiving a status 4 report that the data receiving end returns when the received data includes an incomplete data packet and the radio resource is limited, and the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when not When there is one complete data packet, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the sequence number of the incomplete data packet; or when incomplete When there are two or more data packets, the receiving sequence number is the sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number is the two or two. The sequence number of the smallest data packet in the incomplete data packet; the data packet corresponding to the request retransmission sequence number is sent to the data receiving end.

Optionally, the state 4 report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. The embodiment of the present invention further provides a computer program product comprising a computer readable medium, the readable medium comprising a first set of program code for performing the steps in the method shown in FIG. 1 above: Receiving data sent by the data transmitting end on the wireless link; when the received data includes an incomplete data packet and the wireless resource is limited, sending a status report to the data sending end, where the status report includes receiving sequence number and request weight The serial number; wherein, when there is one incomplete data packet, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the incomplete data packet. Or serial number; or when there are two or more incomplete data packets, the receiving sequence number is the sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number The sequence number of the packet with the lowest sequence number among the two or more incomplete data packets. Optionally, the status report further includes one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream end indication bit E1 field, and a second code stream. End indicator bit E2 field. For example, the status report includes: a data control indication bit D/C field, a control protocol data unit type CPT field, a reception sequence number ACK_SN field, a first code stream end indication bit E1 field, a request retransmission sequence number NACK_SN field, The E1 field and the second code stream end indicate the bit E2 field. In addition, an embodiment of the present invention further provides another computer program product, the computer program product comprising a computer readable medium, the readable medium comprising a second set of program code, for performing the steps in the method shown in FIG. 3: Transmitting data to the data receiving end through the wireless link; receiving a status 4 report that the data receiving end returns when the received data includes an incomplete data packet and the radio resource is limited, and the status report includes receiving the sequence number and requesting retransmission No.; wherein, when there is one incomplete data packet, the receiving sequence number is the sequence number of the first unreceived data packet after the received data packet, and the request retransmission sequence number is the sequence number of the incomplete data packet. Or when there are two or more incomplete data packets, the receiving sequence number is the sequence number of the second smallest data packet among the two or more incomplete data packets, and the request retransmission sequence number is The sequence number of the data packet with the smallest sequence number among the two or more incomplete data packets; and the data packet corresponding to the request retransmission sequence number is sent to the data receiving end. Optionally, the Status 4 report also includes one or more of the following fields: The data control indication bit D/C field, the control protocol data unit type CPT field, the first code stream end indication bit E1 field, and the second code stream end indication bit E2 field. It will be understood by those skilled in the art that all or part of the steps of implementing the above method embodiments may be performed by hardware related to the program instructions. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps including the foregoing method embodiments are performed; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Rights request

A data feedback method, comprising: receiving data sent by a data transmitting end on a wireless link; and when the received data includes an incomplete data packet and the wireless resource is limited, the data is sent to the data The sending end sends a status report, where the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is the first unreceived data after the received data packet a sequence number of the packet, the request retransmission sequence number is a sequence number of the incomplete data packet; or when there are two or more incomplete data packets, the receiving sequence number is the two or more The sequence number of the second smallest data packet in the incomplete data packet, and the request retransmission sequence number is the sequence number of the data packet with the smallest serial number among the two or more incomplete data packets.

2. The method according to claim 1, wherein the status report further comprises one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream. The end indication bit E1 field and the second code stream end indication bit E2 field.

A data retransmission method, comprising: transmitting data to a data receiving end through a wireless link; and receiving the data receiving end to return when the received data includes an incomplete data packet and the radio resource is limited Status report, the status report includes a receiving sequence number and a request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is the first unreceived data packet after the received data packet The sequence number is the serial number of the incomplete data packet; or when two or more incomplete data packets are present, the receiving sequence number is incomplete for the two or more The serial number of the second smallest data packet in the data packet, the request retransmission sequence number is the sequence number of the smallest data packet among the two or more incomplete data packets; and sent to the data receiving end The request retransmits the data packet corresponding to the sequence number.

4. The method according to claim 3, wherein the status report further comprises one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream. The end indication bit El field and the second code stream end indication bit E2 field.

A data feedback device, comprising: a data receiving module, configured to receive data sent by a data transmitting end on a wireless link; and a feedback module, configured to include an incomplete data packet in the received data When the radio resource is limited, the status message is sent to the data sending end, where the status includes the receiving sequence number and the request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is the received data. The sequence number of the first unreceived data packet after the packet, the request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two or more incomplete data packets, the receiving The sequence number is the sequence number of the second smallest data packet in the two or more incomplete data packets, and the request retransmission sequence number is the smallest sequence number among the two or more incomplete data packets. The serial number of the packet.

6. The apparatus according to claim 5, wherein the status report further comprises one or more of the following fields: a data control indication bit D/C field, a control protocol data unit type CPT field, a first code stream. The end indication bit E1 field and the second code stream end indication bit E2 field.

A data retransmission device, comprising: a data sending module, configured to send data to a data receiving end through a wireless link; and a report receiving module, configured to receive the data received by the data receiving end, including The status report returned when the data packet is incomplete and the radio resource is limited, and the status report includes the receiving sequence number and the request retransmission sequence number; wherein, when there is one incomplete data packet, the receiving sequence number is the received data. The sequence number of the first unreceived data packet after the packet, the request retransmission sequence number is the sequence number of the incomplete data packet; or when there are two or more incomplete data packets, the receiving The sequence number is the sequence number of the second smallest data packet in the two or more incomplete data packets, and the request retransmission sequence number is the smallest sequence number among the two or more incomplete data packets. The serial number of the data packet;

8. The apparatus according to claim 7, wherein the status report further comprises one or more of the following fields: The data control indication bit D/C field, the control protocol data unit type CPT field, the first code stream end indication bit E1 field, and the second code stream end indication bit E2 field.

9. A user equipment, comprising: a memory and a processor coupled to the memory, wherein the memory stores a set of program codes, and the processor is configured to invoke a program stored in the memory The code, the data feedback method according to claim 1 or 2, or the data retransmission method according to claim 3 or 4.

A base station, comprising: a memory and a processor coupled to the memory, wherein the memory stores a set of program codes, and the processor is configured to call a program code stored in the memory The data feedback method according to claim 1 or 2, or the data retransmission method according to claim 3 or 4.

A computer program product, comprising: a computer readable medium, the readable medium comprising a set of program code for performing the data feedback method of claim 1 or 2, or for performing The data retransmission method of claim 3 or 4.