Retransmission feedback method, related device, and computer-readable medium

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043]It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and/or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and/or collections thereof.

[0044] It should also be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

[0045] It should also be further understood that the term "and/or" used in the description of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations .

[0046] As used in this specification and the appended claims, the term "if" may be construed as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context . Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be construed, depending on the context, to mean "once determined" or "in response to the determination" or "once detected [the described condition or event] ]” or “in response to detection of [described condition or event]”.

[0047] An embodiment of the present invention provides a retransmission feedback system. The retransmission feedback system includes: a data feedback device and a data sending device, and the data feedback device and the data sending device can communicate.

[0048] Wherein, the data feedback device may be a network-side device, for example, a base station (eNodeB, eNB); in the fifth-generation communication technology (5th-Generation, 5G), the network-side device may be a base station (gNB) suitable for NR ); in communication systems of other technologies, the network-side device may also have other names, which will not be listed one by one here. Optionally, the data feedback device can also be a user device, and the user device can be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a mobile Internet device (Mobile Internet Device, MID), a wearable device (such as a smart watch (such as iWatch, etc.), smart bracelets, pedometers, etc.), etc. The data sending device may also be user equipment or network side equipment.

[0049] It can be understood that, when the data feedback device is used as the user equipment, the data sending device can be used as the network side device; when the data feedback device is used as the network side device, the data sending device can be used as the user equipment. see figure 1 , figure 1 is a schematic diagram of the network architecture of a retransmission feedback system provided by an embodiment of the present invention, figure 1 It shows the retransmission system in the case that the data feedback device is used as the user equipment, and the data sending device is used as the network side device. like figure 1 As shown, the retransmission system specifically includes: user equipment 110 and network-side equipment 120. For the specific description of the user equipment 110 and network-side equipment 120, reference may be made to the foregoing description, and details will not be repeated here. The retransmission feedback method described in the embodiment of the present invention can be applied to figure 1 The described retransmission system is used to reduce the overhead of uplink control information resources and power, and improve the transmission efficiency of uplink control information.

[0050] see figure 2 , figure 2 It is a schematic flowchart of a retransmission feedback method provided by an embodiment of the present invention. The retransmission feedback method can be applied to a data feedback device. Specifically, the data feedback device can be a network side device such as a base station, or a user equipment. like figure 2 As shown, the retransmission feedback method may include but not limited to the following steps:

[0051] 201. Receive at least two transmission blocks TB sent by the data sending device;

[0052] Wherein, one TB may contain multiple CBs. image 3 A schematic block diagram of a TB provided by the embodiment of the present invention. like image 3 As shown, a TB contains 24 CBs, image 3 4 CBs are regarded as a CBG. Understandably, image 3 As an example only, the number of CBGs in each TB and the number of CBs in each CBG in the example are only an example, and should not be image 3 The examples of are to be understood as limiting.

[0053] 202. Generate Hybrid Automatic Repeat Request (HARQ) feedback information after decoding the at least two TBs, where the HARQ feedback information includes first indication information and second indication information, where the first indication information is used to indicate the at least two Whether each TB in the TBs is received correctly, if there is a first TB in the at least two TBs, the second indication information is used to indicate whether each coding block group CBG of the second TB is received correctly; the first TB is configured as The CBG is a TB that is transmitted and fed back in units and received incorrectly; the above-mentioned second TB belongs to the above-mentioned first TB.

[0054] The data feedback device checks the cyclic redundancy check (Cyclic Redundancy Check, CRC) code contained in the received TB to obtain the check result of each CB, thereby determining the checksum of the CBG corresponding to the CB. The verification result, or obtain the verification result of the TB corresponding to the CB.

[0055] In the embodiment of the present invention, after the data feedback device decodes the received TB, it generates feedback information according to the decoding result. Specifically, the feedback information includes first indication information and second indication information, wherein the first indication information is fed back in units of TB, that is, one TB is fed back using one HARQ-ACK bit; the second indication information is fed back in units of CBG Feedback is performed, that is, one CBG uses one HARQ-ACK bit to feed back. Wherein, the first indication information includes the decoding results of the at least two TBs, and the second indication information includes the decoding results of the CBGs of the second TB.

[0056] In the embodiment of the present invention, after the data feedback device decodes the above-mentioned at least two TBs, it can be determined whether the wrongly decoded TB (that is, the wrongly received TB) belongs to the target TB set configured by the network side device such as the base station, and the target TB The set is a set of TBs that are transmitted and fed back in units of CBG; if a TB that is incorrectly decoded belongs to the target TB set, then in the feedback information that includes the second indication information generated by the data feedback device, the second The indication information may include the decoding results of the CBGs in the TB with decoding errors (that is, indicating whether the CBGs in the TB with decoding errors are received correctly). If the wrongly decoded TB does not belong to the target TB set, the second indication information does not include the decoding result of the wrongly decoded TB.

[0057] The second indication information is used to indicate whether each CBG in the second TB is correctly received, the second TB belongs to the first TB, and the number of the second TB is related to the threshold M.

[0058] Wherein, the above-mentioned threshold M is a fixed positive integer value, for example, specified as a certain fixed value from 1 to 6; or, the above-mentioned threshold M is related to the number of Physical Downlink Shared Channel PDSCH that needs multiplexing feedback, and/or the above-mentioned The threshold M is related to whether multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) is used.

[0059] Wherein, the threshold M may be a static value preset by the user equipment and the network side equipment. For example, the threshold M can be 1, 2, 3, 4, 5 or 6. Optionally, the threshold M may also be a dynamic value. For example, in the case where the data feedback device is a user equipment, the threshold M may be related to the number of physical downlink shared channels (Physical Downlink SharedChannel, PDSCH) that require multiplexing feedback, Moreover, the threshold M may also be related to whether MIMO is used when the data sending device communicates with the data feedback device. Therefore, optionally, the embodiment of the present invention also provides a method for determining the threshold M, as follows:

[0060] M=[PDSCH Num ×10%]×MIMO_TBNum

[0061] Wherein, PDSCH_Num is the number of PDSCHs that need to be multiplexed and fed back, and MIMO_TBNum is the number of TBs contained in each PDSCH related to whether MIMO is used. The value of PDSCH_Num is related to the number of component carriers (ComponentCarrier, CC) and the number of time slots to be fed back at the same time. For example, the value of PDSCH_Num may be the product of the number of CCs and the number of time slots to be fed back simultaneously. In addition, regarding MIMO, for example, in an LTE system, if MIMO is adopted, MIMO_TBNum is 2, and if MIMO is not adopted, MIMO_TBNum is 1. It can be understood that the specific value of MIMO_TBNum when using MIMO is not limited in the embodiment of the present invention, and may have different values ​​in different communication technologies. Therefore, when using MIMO in the embodiment of the present invention, MIMO_TBNum should not be 2 is understood as limiting the embodiment of the present invention.

[0062] As shown in Table 1, Table 1 shows the relationship between the number of PDSCHs requiring multiplexing feedback and whether to use MIMO and M.

[0063] Table 1

[0064]

[0065] It can be understood that the above Table 1 is only an example, and should not be construed as a limitation on the threshold M in the embodiment of the present invention.

[0066] Optionally, in the case where the data sending device is a network-side device, the threshold M may also be related to the number of physical uplink shared channels (Physical Uplink Shared Channel, PUSCH) that require multiplexing feedback, and the threshold M may also be related to When the data sending device communicates with the data feedback device, whether to use MIMO correlation, such as the calculation formula of the threshold M is as follows:

[0067] M=[PUSCH Num ×10%]×MIMO_TBNum

[0068] Among them, PUSCH_Num is the number of PUSCHs that need to be multiplexed and fed back, and MIMO_TBNum is the number of TBs contained in each PDSCH related to whether MIMO is used. The value of PUSCH_Num is related to the number of component carriers (ComponentCarrier, CC) and the number of time slots to be fed back at the same time. For example, the value of PDSCH_Num may be the product of the number of CCs and the number of time slots to be fed back simultaneously.

[0069]Specifically, when the data feedback device needs to generate HARQ feedback information after decoding the TB, the number of TBs fed back by the data feedback device can be related to the number of component carriers (ComponentCarrier, CC), the number of feedback time slots, and whether Using MIMO correlation. If the carrier aggregation technology is used, the number of TBs that need to be fed back is related to the number of CCs, and the more the number of CCs, the more the number of TBs that need to be fed back. In addition, if the number of time slots that the data feedback device needs to feed back at the same time is larger, the number of TBs that need to be fed back is also larger. When the data feedback device communicates with the data sending device, whether MIMO is used also affects the number of TBs that need to be fed back. If the data feedback device uses MIMO technology when communicating with the data sending device, the number of TBs will be correspondingly more. It can be understood that the scenario in the embodiment of the present invention is that the data feedback device needs to include decoding results of TBs of multiple PDSCHs in a single feedback.

[0070] For example, the data feedback device is user equipment such as a terminal, and the data sending device is a network-side device such as a base station, and uses carrier aggregation (Carrier Aggregation, CA) technology; after the terminal receives the TB sent by the base station, the terminal can The number of TBs and the number of time slots that need to be multiplexed and fed back determine the number of TBs that need to be fed back. If there are 5 CCs and the number of time slots that the terminal needs to feed back at the same time is 2, then the number of TBs that need to be multiplexed and fed back is 10, that is, the feedback information includes decoding results of 10 TBs.

[0071] In this embodiment of the present invention, each of the above-mentioned TBs configured to be transmitted and fed back in units of CBGs includes one CBG or multiple CBGs, such as image 3 As shown, a TB can contain 6 CBGs.

[0072] The number of HARQ-ACK feedback bits contained in each TB in the second indication information can be determined in the following two ways:

[0073] 1) If each PDSCH configures the maximum number of CBGs separately through Radio Resource Control (RRC) signaling, then each TB contains the same number of HARQ-ACK feedback bits, and is the upper limit of the number of CBGs for all TBs specified by the system ;

[0074] 2) If each PDSCH is configured with the same maximum number of CBGs through RRC signaling, then each TB contains the same number of HARQ-ACK feedback bits, and is the same maximum number of CBGs configured by RRC signaling.

[0075] That is to say, the number of CBGs contained in each TB in the above first implementation may be different, but the number of HARQ-ACK feedback bits allocated to each second TB in the second indication information is the same, for the system The specified upper limit of the number of CBGs for all TBs, the number of CBGs included in each TB in the above second implementation manner is the same. The above two methods can ensure that the number of HARQ-ACK feedback bits contained in each TB in the second indication information is the same, and the decoding results of each CBG in the second TB have corresponding bits (bits) to carry.

[0076] Wherein, if the number of CBGs contained in a certain second TB is less than the number of HARQ-ACK feedback bits contained in each TB in the second indication information, then for the HARQ-ACK feedback bits corresponding to the second TB in the second indication information, Except for the feedback information bits used to carry the decoding results of the CBGs of the second TB, the remaining redundant bits may be fixed default values ​​such as 0 or 1, or used for result verification.

[0077] Optionally, when the number N of the first TB is less than or equal to the threshold M, the second TB is the first TB;

[0078] In a case where the number N of the first TBs is greater than the threshold M, the second TBs are M TBs in the N first TBs.

[0079] Wherein, when the number of erroneously received TBs is less than the threshold M, the second indication information includes not only the decoding result of the second TB (that is, the erroneously received TBs), but also redundant information, and the redundant information is located in The HARQ-ACK feedback bits that do not correspond to the decoding results of any TB, these redundant information bits can be fixed default values ​​such as 0 or 1, or used for result verification.

[0080] When the number N of the first TB is greater than the threshold M, the data feedback device may select M TBs from the N first TBs as the second TB, so that the decoding results of each CBG in the second TB (that is, whether they are correct or not) received) to fill in the second indication information.

[0081] It can be understood that the data feedback device may also select M TBs from the foregoing N first TBs as the second TBs according to the order of TB indexes. Alternatively, the data feedback device may also select M TBs from the N first TBs as the second TBs in other ways, and the above index order is only an example and should not be construed as limiting to the embodiment of the present invention.

[0082] 203. Send the foregoing HARQ feedback information to the foregoing data sending device.

[0083] Implementing the embodiment of the present invention, when the data feedback device receives the TB from the data sending device, the data feedback device decodes the received TB to determine the TB and CBG that need to be retransmitted by the data sending device; and then The HARQ feedback information is generated according to the decoding result, and by sending the HARQ feedback information to the data sending device, the overhead of uplink control information resources and power can be reduced, and the utilization rate of uplink control resources and transmission efficiency can be improved.

[0084] see Figure 4 , Figure 4 is a schematic flowchart of a retransmission feedback method provided by another embodiment of the present invention, and the retransmission feedback method can be applied to a data sending device, such as Figure 4 As shown, the retransmission feedback method may include:

[0085] 401. Receive the hybrid automatic repeat request HARQ feedback information sent by the data feedback device; the HARQ feedback information includes first indication information and second indication information, and the first indication information is used to indicate whether each TB in at least two TBs Correctly received, if the first TB exists in the at least two TBs, the second indication information is used to indicate whether the coded block groups CBG of the second TB are received correctly; the first TB is configured to be transmitted in units of CBG and TBs that are fed back and received in error; the above-mentioned second TB belongs to the above-mentioned first TB.

[0086] The second indication information is used to indicate whether each CBG in the second TB is correctly received, the second TB belongs to the first TB, and the number of the second TB is related to the threshold M.

[0087] Optionally, when the number N of the first TB is less than or equal to the threshold M, the second TB is the first TB;

[0088] In a case where the number N of the first TBs is greater than the threshold M, the second TBs are M TBs in the N first TBs.

[0089] In the embodiment of the present invention, each TB configured to be transmitted and fed back in units of CBGs includes one CBG or multiple CBGs.

[0090] It can be understood that, for the relevant description of the second TB and the threshold M, refer to the relevant description of the foregoing embodiments, and details are not repeated here.

[0091] It can be understood that the second indication information includes the decoding results of the CBGs of the second TB in the TB received by the data feedback device, that is, the second indication information indicates the CBGs in the second TB that need to be retransmitted.

[0092] 402. After analyzing the foregoing HARQ feedback information, determine data that needs to be retransmitted.

[0093] In the embodiment of the present invention, by parsing the feedback information including the first indication information and the second indication information, the data sending device can know the CBG that needs to be retransmitted from the first indication information and the second indication information, or can learn from the first indication information and the second indication information. The TB that needs to be retransmitted is known from the indication information.

[0094] After the data feedback device decodes the above-mentioned at least two TBs, it can be determined whether the wrongly decoded TB (that is, the wrongly received TB) belongs to the target TB set configured by the network side device such as the base station, and the target TB set is in units of CBG A collection of TBs for transmission and feedback. If one of the incorrectly decoded TBs belongs to the target TB set, the second indication information may include the decoding result of each CBG in the incorrectly decoded TB (that is, indicates whether each CBG in the incorrectly received TB is received correctly). At this time, the second indication information may be used to indicate the CBG that needs to be retransmitted (that is, the CBG received incorrectly by the data feedback device). If the wrongly decoded TB does not belong to the target TB set, the second indication information does not include the decoding result of the wrongly decoded TB.

[0095] By implementing the embodiment of the present invention, the efficiency of parsing HARQ feedback information of a data sending device (such as a network side device) and the efficiency of retransmission of downlink data can be improved.

[0096] Based on the above description, see Figure 5A , Figure 5A It is a schematic diagram of a specific scenario of a retransmission feedback method provided by the embodiment of the present invention. In the embodiment of the present invention, not only the implementation of the above retransmission feedback method is described, but also the first TB and the second TB and the threshold M's relationship. The first TB is a TB that is configured to be transmitted and fed back in units of CBG and received in error. like Figure 5A As shown, the retransmission feedback method may include but not limited to the following steps:

[0097] 501. The base station establishes a communication connection with the user equipment;

[0098] 502. The foregoing base station sends at least two TBs to the foregoing user equipment;

[0099] 503. After the above-mentioned user equipment receives the above-mentioned at least two TBs, the above-mentioned user equipment decodes the above-mentioned at least two TBs, obtains a decoding result, and determines a TB that is decoded incorrectly among the above-mentioned at least two TBs according to the decoding result;

[0100] 504. If the number N of the first TB is less than or equal to the threshold M, the user equipment determines that the first TB is a second TB, and generates HARQ according to the decoding result of the second TB and the decoding results of the at least two TBs Feedback;

[0101] Wherein, the HARQ feedback information includes first indication information and second indication information, the first indication information includes the decoding results of the at least two TBs, that is, the first indication information is used to indicate whether each TB of the at least two TBs is correct Receiving: the second indication information includes the decoding results of the CBGs in the second TB (that is, the first TB), that is, the second indication information is used to indicate whether the CBGs in the second TB are received correctly.

[0102] Wherein, the threshold M is used to determine the quantity of the second TB.

[0103]It can be understood that, in the case where N is less than M, the second indication information not only includes the decoding result of the second TB, but also includes redundant information, and the redundant information is located in the HARQ-ACK that does not correspond to the decoding result of any TB. Feedback bit. Assuming that N is 1 and M is 2, since M is 2, in addition to writing the decoding result of the wrongly decoded TB (that is, the second TB) into the second indication information, the second indication information also includes redundant Information, these redundant information bits can be fixed default values ​​such as 0 or 1, or used for result verification.

[0104] 505. The user equipment sends the HARQ feedback information including the first indication information and the second indication information to the base station;

[0105] 506. After receiving the HARQ feedback information from the user equipment including the first indication information and the second indication information, the base station analyzes the HARQ feedback information to determine the CBG and TB that need to be retransmitted.

[0106] Implementing the embodiment of the present invention, by designing a retransmission feedback information format that combines feedback in units of TB and feedback in units of CBG, the overhead of uplink control signaling can be effectively reduced, and the utilization rate of uplink control resources can be improved. and transmission efficiency, and also improves the efficiency of the data sending device in parsing the HARQ feedback information.

[0107] Based on the above description, see Figure 5B , Figure 5B is a schematic diagram of a specific scenario of a retransmission feedback method provided by another embodiment of the present invention, as shown in Figure 5B As shown, the retransmission feedback method may include but not limited to the following steps:

[0108] 510. The base station establishes a communication connection with the user equipment;

[0109] 520. The foregoing base station sends at least two TBs to the foregoing user equipment;

[0110] 530. After the above-mentioned user equipment receives the above-mentioned at least two TBs, the above-mentioned user equipment decodes the above-mentioned at least two TBs, obtains a decoding result, and determines a TB that is incorrectly decoded among the above-mentioned at least two TBs according to the decoding result;

[0111] 540. If the number N of the first TBs is greater than the threshold M, the user equipment selects M TBs from the N first TBs and determines them as the second TB, based on the decoding result of the second TB and the at least two The decoding result of TB generates HARQ information;

[0112] Wherein, the HARQ feedback information includes first indication information and second indication information, the first indication information includes the decoding results of the at least two TBs, that is, the first indication information is used to indicate whether each TB of the at least two TBs is correct Receiving; the second indication information includes the decoding results of the CBGs in the second TB (that is, the M TBs in the first TB), that is, the second indication information is used to indicate whether the CBGs in the second TB are received correctly.

[0113] Wherein, the threshold M is used to determine the quantity of the second TB.

[0114] Specifically, the above-mentioned selection of M TBs from the above-mentioned N first TBs to determine as the second TB includes:

[0115] M TBs are sequentially selected from the above N first TBs according to the order of indexes and determined as the second TBs.

[0116] It can be understood that the data feedback device may also sequentially select M TBs from the N first TBs in other ways to determine them as the second TB and so on. has a limited meaning.

[0117] By implementing this embodiment, it is possible to effectively clarify the correspondence between the first TB and the second TB when the number of TBs with decoding errors exceeds the threshold M, so as to avoid generating the first TB due to the user equipment arbitrarily selecting M TBs in the first TB. Two indication information, so that the base station cannot determine which first TB the wrongly decoded CBG in the second indication information belongs to.

[0118] 550. The user equipment sends the HARQ feedback information including the first indication information and the second indication information to the base station;

[0119] 560. After receiving the HARQ feedback information from the user equipment including the first indication information and the second indication information, the base station analyzes the HARQ feedback information to determine the CBG and TB that need to be retransmitted.

[0120] Implementing the embodiment of the present invention, by designing a retransmission feedback information format that combines feedback in units of TB and feedback in units of CBG, the overhead of uplink control signaling can be effectively reduced, and the utilization rate of uplink control resources can be improved. and transmission efficiency, and also improves the efficiency of the data sending device in parsing the HARQ feedback information.

[0121] for easy understanding figure 2 , Figure 4 , Figure 5A and Figure 5B For the described implementation, please refer to the specific embodiments described in the following scenarios. It can be understood that, in this embodiment of the present invention, the data feedback device is used as a user device such as a terminal, and the data sending device is used as a base station for illustration, but it should not be understood as It has a limiting meaning to the embodiments of the present invention.

[0122] scene one,

[0123] It is assumed that the HARQ feedback scenario is: data is transmitted in the form of carrier aggregation, that is, 5 CCs are aggregated, and PDSCHs of 2 slots (slots) need to be fed back at the same time, and MIMO technology is not used. Each TB is configured to perform transmission and feedback in units of CBGs, and the maximum number of CBGs configured through RRC signaling is the same and is 6. Therefore, when performing HARQ feedback, it is necessary to multiplex and feedback 5×2=10(TB).

[0124] Using the retransmission feedback method described in the embodiment of the present invention, the number of HARQ-ACK feedback bits contained in each TB in the second indication information is 6. Assuming that the threshold M is determined by the method described in Table 1, the threshold M is 1.

[0125] Assume that the second TB (ie 610) is a TB that the terminal decodes incorrectly. Among the CBGs corresponding to the second TB610, the second CBG (namely 611) and the third CBG (namely 612) are CBGs that are incorrectly decoded by the terminal.

[0126] Therefore the number N of the first TB is 1, and it is the second TB 610 . Since the number N of the first TB is equal to the threshold M, the second TB is the first TB and is the second TB 610 .

[0127] The HARQ feedback information structure is as follows Figure 6A as shown, Figure 6A In the schematic diagram shown, the TB index order is from left to right. According to the order of TB index, fill the decoding result of TB into the first indication information that is transmitted and fed back in units of TB, such as Figure 6A The decoding results of the first TB shown without marks, the third TB to the tenth TB and the second TB 610 shown with marks. Fill the second TB, that is, the decoding results of each CBG in the second TB610 into the second indication information, such as Figure 6A The decoding results of CBG611 and CBG612 shown in , and the decoding results of other CBGs shown without labels.

[0128] The terminal reports the generated HARQ feedback information (including the first indication information and the second indication information) to the base station, and the base station decodes the transmission error of the second CBG611 and the third CBG612 of the second TB610, so the base station will retransmit the first The second CBG611 and the third CBG612 of the two TB610.

[0129] It can be understood that, if the retransmission feedback method described in the embodiment of the present invention is not used, the number of bits of the HARQ feedback information generated by the terminal is: 10TB×6CBG=60bit; the retransmission feedback method described in the embodiment of the present invention is used , the number of bits of the HARQ feedback information generated by the terminal is: 10TB+1TB×6CBG=16bit. Obviously, after adopting the retransmission feedback method described in the embodiment of the present invention, the number of HARQ-ACK feedback information bits generated by the terminal is greatly reduced, effectively reducing the overhead of uplink control signaling, and improving the utilization rate and transmission efficiency of uplink control resources , and also improve the efficiency of parsing the HARQ feedback information of the data sending device.

[0130] scene two,

[0131] It is assumed that the HARQ feedback scenario is: data is not transmitted in the form of carrier aggregation, PDSCHs of 8 slots (slots) need to be fed back at the same time, and MIMO technology is adopted (the number of TBs contained in each PDSCH is 2TB). Each TB is configured to perform transmission and feedback in units of CBGs, and the maximum number of CBGs configured through RRC signaling is the same and is 6. Therefore, when performing HARQ feedback, it is necessary to multiplex and feedback 8×2=16 (TB).

[0132] Using the retransmission feedback method described in the embodiment of the present invention, the number of HARQ-ACK feedback bits contained in each TB in the second indication information is 6. Assuming that the threshold M is determined by the method described in Table 1, the threshold M is 2.

[0133] Assume that the second TB (TB620) and the thirteenth TB (TB630) are TBs that the terminal decodes incorrectly. Among the CBGs corresponding to the second TB620, the second CBG (that is, 621) is the CBG that the terminal decodes incorrectly. Among the CBGs corresponding to the thirteenth TB630, the second CBG (CBG631) and the fifth CBG (CBG632) are CBGs that are incorrectly decoded by the terminal.

[0134] Therefore, the number N of the first TB is 2, and there are the second TB620 and the thirteenth TB630. Since the number N of the above-mentioned first TB is equal to the above-mentioned threshold value M, the second TB is the above-mentioned first TB, and is the second TB620 and the thirteenth TB630.

[0135] The HARQ feedback information structure is as follows Figure 6B as shown, Figure 6B In the schematic diagram shown, the TB index order is from left to right. According to the order of TB index, fill the decoding result of TB into the first indication information that is transmitted and fed back in units of TB, such as Figure 6B The decoding of the first TB, the third TB to the twelfth TB, the fourteenth TB to the sixteenth TB, and the second TB620 and the thirteenth TB630 shown in the marks result. Fill the second TB, that is, the decoding results of the CBGs in the second TB620 and the thirteenth TB630 into the second indication information, such as Figure 6B The decoding results of CBG621, CBG631, and CBG632 shown in , and the decoding results of other CBGs shown without labels.

[0136] The terminal reports the generated HARQ feedback information (including the first indication information and the second indication information) to the base station, and the base station decodes the second CBG621 of the second TB620 and the second CBG631 and fifth CBG631 of the thirteenth TB630 The CBG632 is wrongly transmitted, so the second CBG621 of the second TB620 and the second CBG631 and the fifth CBG632 of the thirteenth TB630 will be retransmitted.

[0137] scene three,

[0138]It is assumed that the HARQ feedback scenario is: data is not transmitted in the form of carrier aggregation, PDSCHs of 8 slots (slots) need to be fed back at the same time, and MIMO technology is adopted (the number of TBs contained in each PDSCH is 2TB). Each TB is configured to perform transmission and feedback in units of CBGs, and the maximum number of CBGs configured through RRC signaling is the same and is 6. Therefore, when performing HARQ feedback, it is necessary to multiplex and feedback 8×2=16 (TB).

[0139] Using the retransmission feedback method described in the embodiment of the present invention, the number of HARQ-ACK feedback bits contained in each TB in the second indication information is 6. Assuming that the threshold M is determined by the method described in Table 1, the threshold M is 2.

[0140] Assume that the second TB (ie TB640) is a TB that the terminal decodes incorrectly. Among the CBGs corresponding to the second TB640, the second CBG (that is, 641) and the third CBG (CBG642) are CBGs that the terminal decoded incorrectly.

[0141] So the number N of the first TB is 1, and it is the second TB640. Since the number N of the first TB is smaller than the threshold M, the second TB is the first TB and is the second TB 640 .

[0142] The HARQ feedback information structure is as follows Figure 6C as shown in Figure 6C In the schematic diagram shown, the TB index order is from left to right. According to the order of TB index, fill the decoding result of TB into the first indication information that is transmitted and fed back in units of TB, such as Figure 6C The decoding results of the unmarked first TB, the third TB to the sixteenth TB, and the marked second TB 640. The second TB, that is, the decoding results of each CBG in the second TB640 are filled in the second indication information, such as Figure 6C The decoding results of CBG641 and CBG642 are shown in , and the decoding results of other CBGs are not shown. Since N is smaller than M, the second indication information not only includes the decoding result of the second TB, but also includes redundant information. Fill the redundant information bit with a fixed default value of 0.

[0143] The terminal reports the generated HARQ feedback information (including the first indication information and the second indication information) to the base station, and the base station decodes that the second CBG641 and the third CBG642 of the second TB640 are wrongly transmitted, so the second CBG642 will be retransmitted The second CBG641 and the third CBG642 of TB640.

[0144] scene four

[0145] It is assumed that the HARQ-ACK feedback scenario is: data is not transmitted in the form of carrier aggregation, and PDSCHs of 8 slots (slots) need to be fed back at the same time, using MIMO technology (the number of TBs contained in each PDSCH is 2 TB). Each TB is configured to perform transmission and feedback in units of CBGs, and the maximum number of CBGs configured through RRC signaling is the same and is 6. Therefore, when performing HARQ-ACK feedback, it is necessary to multiplex and feedback 8×2=16(TB).

[0146] Using the retransmission feedback method described in the embodiment of the present invention, the number of HARQ-ACK feedback bits contained in each TB in the second indication information is 6. Assuming that the threshold M is determined by the method described in Table 1, the threshold M is 2.

[0147] Assume that the second TB (TB650), the eighth TB (TB660) and the thirteenth TB (TB670) are TBs that are incorrectly decoded by the terminal. Among the CBGs corresponding to the second TB650, the second CBG (that is, 651) is a CBG that the terminal decodes incorrectly. Among the CBGs corresponding to the eighth TB660, the first CBG (CBG661) and the second CBG (CBG662) are CBGs that are incorrectly decoded by the terminal.

[0148] Therefore the number N of the first TB is 3, and is the second TB650, the eighth TB660 and the thirteenth TB670. Since the number N of the first TBs is greater than the threshold M, the second TBs are M TBs in the N first TBs. Assume that the terminal selects 2 TBs from the above-mentioned 3 first TBs as the second TB according to the TB index sequence. So the second TB is the second TB650 and the eighth TB660.

[0149] The HARQ feedback information structure is as follows Figure 6D as shown, Figure 6D In the schematic diagram shown, the TB index order is from left to right. According to the order of TB index, fill the decoding result of TB into the first indication information that is transmitted and fed back in units of TB, such as Figure 6D The first TB, the third to the seventh TB, the ninth to the twelfth TB, the fourteenth to the sixteenth TB and the second The decoding results of the first TB650, the eighth TB660 and the thirteenth TB670. Fill the decoding results of the CBGs in the second TB, that is, the second TB650 and the eighth TB660, into the second indication information, such as Figure 6D The decoding results of CBG651, CBG661, and CBG662 shown in , and the decoding results of other CBGs shown without labels.

[0150] The terminal reports the generated HARQ feedback information (including the first indication information and the second indication information) to the base station, and the base station decodes the second CBG651 of the second TB650, the first CBG661 and the second CBG662 of the eighth TB660 And the thirteenth TB670 is wrongly transmitted, so CBG651, CBG661 and CBG662 and all CBGs of the thirteenth TB will be retransmitted.

[0151] The embodiment of the present invention also provides a data feedback device, see Figure 7 , Figure 7 It is a schematic block diagram of a data feedback device provided by an embodiment of the present invention, and the data feedback device includes:

[0152] A receiving unit 701, configured to receive at least two transmission blocks TB sent by the data sending device;

[0153] A decoding unit 702, configured to decode the above-mentioned at least two TBs;

[0154] A generating unit 703, configured to generate HARQ feedback information including first indication information and second indication information in the HARQ feedback information, where the first indication information is used to indicate whether each TB in the at least two TBs is received correctly , if the first TB exists in the at least two TBs, the second indication information is used to indicate whether each coding block group CBG of the second TB is received correctly; the first TB is configured to be transmitted in units of CBG and the TB that was fed back and received in error; the above-mentioned second TB belongs to the above-mentioned first TB;

[0155] The sending unit 704 is configured to send the aforementioned HARQ feedback information to the aforementioned data sending device.

[0156] Implementing the embodiment of the present invention, when the data feedback device receives the TB from the data sending device, the data feedback device decodes the received TB to determine the TB and CBG that need to be retransmitted by the data sending device; Furthermore, HARQ feedback information is generated according to the decoding result, and by sending the HARQ feedback information to the data sending device, the overhead of uplink control information resources and power can be reduced, the utilization rate of uplink control resources and transmission efficiency can be improved, and the system performance can be improved.

[0157] Optionally, the quantity of the second TB is related to the threshold M.

[0158] Optionally, when the number N of the first TB is less than or equal to the threshold M, the second TB is the first TB;

[0159] In a case where the number N of the first TBs is greater than the threshold M, the second TBs are M TBs in the N first TBs.

[0160] Optionally, the above-mentioned threshold M is a fixed positive integer value;

[0161] Alternatively, the threshold M is related to the number of physical downlink shared channels PDSCH that need multiplexing feedback, and/or the threshold M is related to whether MIMO is used.

[0162] Specifically, the formula for calculating the above threshold M is as follows:

[0163] M=[PDSCH Num ×10%]×MIMO_TBNum

[0164] Among them, PDSCH Num is the number of PDSCHs that need to be multiplexed and fed back, and MIMO_TBNum is the number of TBs included in each PDSCH corresponding to whether MIMO is used.

[0165] Optionally, the TB configured to be transmitted and fed back in units of CBG includes one CBG or multiple CBGs.

[0166] Optionally, the number of HARQ-ACK feedback bits contained in each second TB in the second indication information is the same, and if each PDSCH is separately configured with the maximum number of CBGs through signaling, the HARQ-ACK bits contained in each second TB The number of feedback bits is the upper limit of the number of CBGs for all TBs specified by the system;

[0167] If each PDSCH is configured with the same maximum number of CBGs through the signaling, the number of HARQ-ACK feedback bits included in each second TB is the same maximum number of CBGs configured in the signaling.

[0168] It can be understood that the description of each unit can also refer to the first embodiment of the foregoing retransmission feedback method ( figure 2 ), the second embodiment ( Figure 4 ), the third embodiment ( Figure 5A ) and the fourth embodiment ( Figure 5B ), the methods described in ) will not be described in detail here.

[0169] see Figure 8 , Figure 8 It is a schematic block diagram of a data sending device provided by an embodiment of the present invention. As shown in FIG. 8, the data sending device includes:

[0170] The receiving unit 801 is configured to receive HARQ feedback information from the data feedback device; the HARQ feedback information includes first indication information and second indication information, and the first indication information is used to indicate whether each TB in at least two TBs is correct Receiving, if the first TB exists in the at least two TBs, the second indication information is used to indicate whether each coded block group CBG of the second TB is received correctly; the first TB is configured to be transmitted in units of CBG and The TB that is fed back and received in error; the above-mentioned second TB belongs to the above-mentioned first TB;

[0171] An parsing unit 802, configured to parse the above HARQ feedback information;

[0172] The determining unit 803 is configured to determine data that needs to be retransmitted.

[0173] Implementing the embodiment of the present invention can improve the efficiency of the data sending device (network side device) in parsing the feedback information, and improve the efficiency of downlink data retransmission.

[0174] Optionally, the quantity of the above-mentioned second TB is related to the threshold M; the above-mentioned threshold M is a fixed positive integer value;

[0175] Alternatively, the threshold M is related to the number of physical downlink shared channels PDSCH that need multiplexing feedback, and/or the threshold M is related to whether MIMO is used.

[0176] Specifically, the calculation formula of the threshold M is as follows:

[0177] M=[PDSCH Num ×10%]×MIMO_TBNum

[0178] Among them, PDSCH Num is the number of PDSCHs that need to be multiplexed and fed back, and MIMO_TBNum is the number of TBs included in each PDSCH corresponding to whether MIMO is used.

[0179] Optionally, when the number N of the first TB is less than or equal to the threshold M, the second TB is the first TB;

[0180] In a case where the number N of the first TBs is greater than the threshold M, the second TBs are M TBs in the N first TBs.

[0181] Optionally, the number of HARQ-ACK feedback bits contained in each TB in the second indication information is the same,

[0182] If each PDSCH is individually configured with the maximum number of CBGs through signaling, the number of HARQ-ACK feedback bits contained in each TB is the upper limit of the number of CBGs for all TBs specified by the system;

[0183] If each PDSCH is configured with the same maximum number of CBGs through the signaling, then the number of HARQ-ACK feedback bits included in each TB is the same maximum number of CBGs configured for the signaling.

[0184] Specifically, the TB configured to be transmitted and fed back in units of CBG includes one CBG or multiple CBGs.

[0185] It can be understood that the description of each unit can also refer to the first embodiment of the foregoing retransmission feedback method ( figure 2 ), the second embodiment ( Figure 4 ), the third embodiment ( Figure 5A ) and the fourth embodiment ( Figure 5B ), the methods described in ) will not be described in detail here.

[0186] see Figure 9 , Figure 9 It is a schematic block diagram of a data feedback device provided by another embodiment of the present invention. like Figure 9 As shown, the data feedback device in this embodiment may include: one or more processors 901; memory 902 and transceiver 903. The aforementioned processor 901 , memory 902 and transceiver 903 are connected through a bus 904 .

[0187] The memory 902 is used to store computer programs, and the computer program includes program instructions, and the processor 901 is used to execute the program instructions stored in the memory 902.

[0188] Wherein, the processor 901 is configured to call the program instructions to execute:

[0189] receiving at least two transmission blocks TB sent by the data sending device;

[0190] Generating Hybrid Automatic Repeat Request HARQ feedback information after decoding the at least two TBs, wherein the HARQ feedback information includes first indication information and second indication information, where the first indication information is used to indicate the at least two TBs Whether each TB in the above-mentioned at least two TBs is correctly received, if the first TB exists in the above-mentioned at least two TBs, the above-mentioned second indication information is used to indicate whether each coding block group CBG of the second TB is correctly received; the above-mentioned first TB is configured to use CBG as the The TB that the unit transmits and feeds back and receives in error; the above-mentioned second TB belongs to the above-mentioned first TB;

[0191] Send the foregoing HARQ feedback information to the foregoing data sending device.

[0192] It should be understood that in the embodiment of the present invention, the so-called processor 901 may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), dedicated Integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0193] The transceiver 903 may include a receiver and a transmitter, for example, a wireless radio frequency module. The processor 901 described in the embodiment of the present invention receives or sends certain information (such as feedback information), specifically, it can be understood as the processor 901 is received or transmitted through the transceiver 903 . Optionally, the data feedback device may also include other devices, such as a touch panel, a fingerprint sensor (for collecting the user's fingerprint information and fingerprint direction information), a microphone, etc., and may also include a display (LCD, etc.), speakers etc.

[0194] The memory 902 may include read-only memory and random-access memory, and provides instructions and data to the processor 901. A portion of memory 902 may also include non-volatile random access memory. For example, memory 902 may also store device type information.

[0195] In specific implementation, the processor 901 and transceiver 903 described in the embodiment of the present invention can execute the first embodiment, the second embodiment, the third embodiment and the fourth embodiment of the retransmission feedback method provided by the embodiment of the present invention The implementation manner described in , may also implement the implementation manner of the data feedback device described in the embodiment of the present invention, which will not be repeated here.

[0196] In another embodiment of the present invention, a computer-readable storage medium is provided. The above-mentioned computer-readable storage medium stores a computer program, and the above-mentioned computer program includes program instructions. At least two transmission blocks TB sent; after decoding the at least two TBs, hybrid automatic repeat request HARQ feedback information is generated, and the HARQ feedback information includes first indication information and second indication information, wherein the first indication The information is used to indicate whether the TBs in the at least two TBs are received correctly, and if the first TB exists in the at least two TBs, the second indication information is used to indicate whether the coded block groups CBG in the second TB are received correctly; the above The first TB is a TB that is configured to transmit and feed back in units of CBG and is received incorrectly; the second TB belongs to the first TB; and the HARQ feedback information is sent to the data sending device.

[0197] The above-mentioned computer-readable storage medium may be an internal storage unit of the above-mentioned data feedback device in any of the foregoing embodiments, such as a hard disk or a memory of the data feedback device. The above-mentioned computer-readable storage medium may also be an external storage device of the above-mentioned data feedback device, such as a plug-in hard disk equipped on the above-mentioned data feedback device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card , Flash Card (Flash Card) and so on. Further, the above-mentioned computer-readable storage medium may also include both an internal storage unit of the above-mentioned data feedback device and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned data feedback device. The computer-readable storage medium described above can also be used to temporarily store data that has been output or will be output.

[0198] see Figure 10 , Figure 10 It is a schematic block diagram of a data feedback device provided by another embodiment of the present invention. like Figure 10 As shown, the data feedback device in this embodiment may include: one or more processors 1001 ; a memory 1002 and a transceiver 1003 . The above-mentioned processor 1001, memory 1002 and transceiver 1003 are connected through a bus 1004.

[0199] The memory 1002 is used to store computer programs, and the computer program includes program instructions, and the processor 1001 is used to execute the program instructions stored in the memory 1002.

[0200] Wherein, the processor 1001 is configured to call the program instructions to execute:

[0201] Receiving the hybrid automatic repeat request HARQ feedback information sent by the data feedback device; the HARQ feedback information includes first indication information and second indication information, and the first indication information is used to indicate whether each TB in at least two TBs is received correctly , if the first TB exists in the at least two TBs, the second indication information is used to indicate whether each coded block group CBG in the second TB is received correctly; the first TB is configured to be transmitted in units of CBG and The TB that is fed back and received in error; the above-mentioned second TB belongs to the above-mentioned first TB;

[0202] After analyzing the above HARQ feedback information, determine the data that needs to be retransmitted.

[0203] It should be understood that, in the embodiment of the present invention, the so-called processor 1001 may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), dedicated Integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0204] The transceiver 1003 may include a receiver and a transmitter, for example, a wireless radio frequency module, and the processor 1001 described in the embodiment of the present invention receives or sends certain information (such as feedback information), which can be specifically understood as the processor 1001 is received or transmitted through the transceiver 1003 . Optionally, the data feedback device may also include other devices, such as a touch panel, a fingerprint sensor (for collecting the user's fingerprint information and fingerprint direction information), a microphone, etc., and may also include a display (LCD, etc.), speakers etc.

[0205] The memory 1002 may include read-only memory and random-access memory, and provides instructions and data to the processor 1001 . A portion of memory 1002 may also include non-volatile random access memory. For example, memory 1002 may also store device type information.

[0206] In specific implementation, the processor 1001 and transceiver 1003 described in the embodiment of the present invention can execute the first embodiment, the second embodiment, the third embodiment and the fourth embodiment of the retransmission feedback method provided by the embodiment of the present invention The implementation manner described in , may also implement the implementation manner of the data feedback device described in the embodiment of the present invention, which will not be repeated here.

[0207]In another embodiment of the present invention, a computer-readable storage medium is provided. The above-mentioned computer-readable storage medium stores a computer program, and the above-mentioned computer program includes program instructions. When the above-mentioned program instructions are executed by a processor, it is realized: receiving data feedback device The hybrid automatic repeat request HARQ feedback information sent; the above-mentioned HARQ feedback information includes first indication information and second indication information, and the above-mentioned first indication information is used to indicate whether each TB in at least two TBs is received correctly, if the above-mentioned at least If the first TB exists in the two TBs, the above-mentioned second indication information is used to indicate whether each coding block group CBG in the second TB is received correctly; TB; the above-mentioned second TB belongs to the above-mentioned first TB; after analyzing the above-mentioned HARQ feedback information, determine the data that needs to be retransmitted.

[0208] The above-mentioned computer-readable storage medium may be an internal storage unit of the above-mentioned data sending device in any of the foregoing embodiments, such as a hard disk or a memory of the data sending device. The above-mentioned computer-readable storage medium may also be an external storage device of the above-mentioned data sending device, such as a plug-in hard disk equipped on the above-mentioned data sending device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card , Flash Card (Flash Card) and so on. Further, the above-mentioned computer-readable storage medium may also include both an internal storage unit of the above-mentioned data sending device and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned data sending device. The computer-readable storage medium described above can also be used to temporarily store data that has been output or will be output.

[0209] Those of ordinary skill in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are implemented by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

[0210] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described system, data feedback device, data sending device and unit can refer to the corresponding process in the foregoing method embodiment, here No longer.

[0211] In the several embodiments provided in this application, it should be understood that the disclosed system, data feedback device, data sending device and retransmission feedback method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

[0212] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

[0213] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0214] If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of software products, and the computer software products are stored in a storage medium In, several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: various media that can store program codes such as U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk.

[0215] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the present invention. Modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.