CN115348679A - Information feedback method and device - Google Patents

Information feedback method and device Download PDF

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CN115348679A
CN115348679A CN202110528193.8A CN202110528193A CN115348679A CN 115348679 A CN115348679 A CN 115348679A CN 202110528193 A CN202110528193 A CN 202110528193A CN 115348679 A CN115348679 A CN 115348679A
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indication information
time unit
terminal device
time
information
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焦淑蓉
花梦
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202110528193.8A priority Critical patent/CN115348679A/en
Priority to PCT/CN2022/091396 priority patent/WO2022237672A1/en
Publication of CN115348679A publication Critical patent/CN115348679A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides an information feedback method and an information feedback device, wherein the information feedback method comprises the following steps: the terminal equipment receives first indication information sent by network equipment, wherein the first indication information is used for scheduling retransmission of a Transmission Block (TB); the terminal equipment judges whether second indication information is received or not, wherein the second indication information is used for scheduling the initial transmission of the TB; and the terminal equipment sends third indication information to the network equipment, wherein the third indication information is used for indicating whether the terminal equipment has received the second indication information. Thus, the terminal device may send the third indication information to the network device to inform the network device whether to receive the second indication information. If the third indication information indicates that the terminal device does not receive the second indication information, the network device may adjust the scheduling of the TB, so as to avoid an error condition that the network device still sends the scheduling of the retransmission of the TB multiple times after the terminal device does not receive the second indication information, thereby improving network performance.

Description

Information feedback method and device
Technical Field
The present application relates to the field of communications, and more particularly, to a method and an apparatus for information feedback.
Background
Currently, a network device carries scheduling information of uplink/downlink data through a Physical Downlink Control Channel (PDCCH), and carries the downlink/uplink data through a Physical Downlink Shared Channel (PDSCH)/Physical Uplink Shared Channel (PUSCH) corresponding to the scheduling information, and performs data transmission with a terminal device. After receiving the PDCCH, the terminal device may parse the scheduling information of the uplink/downlink data, and perform data transmission on the corresponding PDSCH/PUSCH according to the scheduling information.
However, in the process of repeatedly transmitting Transport Blocks (TBs), due to some factors, such as noise or interference in the wireless environment, a User Equipment (UE) may have a phenomenon of receiving a PDCCH incorrectly, such as failing to correctly receive Downlink Control Information (DCI) for scheduling the initial transmission of the TB, and further, an error condition that the network device still retransmits the PDSCH repeatedly after the terminal device does not receive the initial transmission DCI may occur. Therefore, there is a need for a method and apparatus for information feedback, which can alleviate the above problems.
Disclosure of Invention
The application provides an information feedback method and an information feedback device, which can enable a terminal device to judge and feed back whether DCI (Downlink control information) originally transmitted by a scheduling Transport Block (TB) is received after the DCI is retransmitted by the TB, so that a network device can accurately acquire the receiving condition of the DCI originally transmitted by the scheduling TB and adjust the scheduling of the TB, thereby avoiding the error condition that the network device still retransmits a PDSCH for many times after the terminal device does not receive the DCI originally transmitted, and further improving the network performance.
In a first aspect, a method for information feedback is provided, including: the terminal equipment receives first indication information sent by network equipment, wherein the first indication information is used for scheduling retransmission of a Transport Block (TB); the terminal equipment judges whether second indication information is received or not, wherein the second indication information is used for scheduling the initial transmission of the TB; the terminal device sends third indication information to the network device, wherein the third indication information is used for indicating whether the terminal device has received the second indication information.
Based on the above scheme, the terminal device may send third indication information to the network device to inform the network device whether to receive the second indication information. If the third indication information indicates that the terminal device does not receive the second indication information, the network device may adjust the scheduling of the TB, so as to avoid an error condition that the network device still sends the scheduling of the retransmission of the TB multiple times after the terminal device does not receive the second indication information, thereby improving network performance.
It should be understood that if the terminal device does not receive the second indication information, it cannot acquire Transport Block Size (TBs) information of the TB, and cannot decode correctly, and even if the TB is retransmitted many times, decoding cannot be successfully performed. Therefore, after the network device receives the third indication information indicating that the terminal device does not receive the second indication information, it may transmit the scheduling information scheduling the early transmitted TB and transmit the TB in the early transmitted form. Therefore, the terminal equipment can obtain the TBS information of the TB, and the accuracy of decoding is improved; meanwhile, the terminal equipment can correctly receive the TB in the retransmission scheduling mode, and the success rate of self-decoding is improved.
With reference to the first aspect, in some implementations of the first aspect, the determining, by the terminal device, whether the second indication information has been received includes: and under the condition that a preset condition is met, the terminal equipment judges that the second indication information is not received, wherein the preset condition comprises at least one of the following items: the terminal device receives indication information which is used for scheduling initial transmission of the TB and is not received between fourth indication information and the first indication information, the value of the NDI of the first indication information and the value of the NDI of the fourth indication information are overturned, and a Hybrid automatic repeat request (HARQ) process number of the first indication information is the same as an HARQ process number of the fourth indication information, wherein the fourth indication information is used for scheduling initial transmission or retransmission of a previous TB of the TB, and the receiving time of the fourth indication information is prior to the receiving time of the first indication information.
With reference to the first aspect, in some implementations of the first aspect, a time interval between an end time at which the terminal device receives the first indication information and a start time at which the terminal device transmits the third indication information is greater than or equal to a first time period, where the first time period is less than or equal to a second time period, and the second time period is a shortest time between the end time at which the terminal device receives the PDSCH and the start time at which the HARQ-ACK information corresponding to the TB carried on the PDSCH is transmitted.
With reference to the first aspect, in some implementations of the first aspect, the sending, by the terminal device, the third indication information to the network device includes: the terminal device sends the third indication information to the network device in a first time unit, where the first time unit is a time unit for sending HARQ-ACK information corresponding to a retransmission TB scheduled by the first indication information, or the first time unit is determined according to time unit offset indication information and a time unit index of the terminal device for receiving the first indication information, where the time unit offset indication information indicates an offset of the time unit, or the first time unit is determined according to the time unit of the terminal device for receiving the first indication information and the first time period.
With reference to the first aspect, in certain implementations of the first aspect, in a case that the first time unit is determined according to the first indication information and a time unit index at which the terminal device receives the first indication information, the time unit offset indication information is included in the first indication information.
With reference to the first aspect, in certain implementations of the first aspect, the first time unit is a time unit corresponding to a time unit index in which the time unit index of the terminal device that receives the first indication information is superimposed with the time unit offset.
With reference to the first aspect, in certain implementation manners of the first aspect, in a case that the first time unit is determined according to the time unit in which the terminal device receives the first indication information and the first time period, the first time unit is a first uplink time unit after an end time at which the terminal device receives the first indication information is overlapped with the first time period.
With reference to the first aspect, in some implementations of the first aspect, the third indication information corresponds to the same PUCCH as HARQ-ACK information corresponding to a retransmission TB scheduled by the first indication information.
In a second aspect, a method for information feedback is provided, including: the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for scheduling retransmission of the TB; the network device receives third indication information sent by the terminal device, where the third indication information is used to indicate whether the terminal device has received second indication information, where the second indication information is used to schedule initial transmission of the TB, and the sending time of the second indication information is earlier than that of the first indication information.
With reference to the second aspect, in some implementations of the second aspect, the network device sends fourth indication information to the terminal device, where the fourth indication information is used to schedule initial transmission or retransmission of a previous TB of the TB.
With reference to the second aspect, in some implementations of the second aspect, the receiving, by the network device, third indication information sent by the terminal device includes: the network device receives the third indication information sent by the terminal device in a first time unit, where the first time unit is a time unit for sending HARQ-ACK information corresponding to a retransmission TB scheduled by the first indication information, or the first time unit is determined according to time unit offset indication information and a time unit index of the terminal device for receiving the first indication information, where the time unit offset indication information indicates an offset of the time unit, or the first time unit is determined according to the time unit of the terminal device for receiving the first indication information and the first time period.
With reference to the second aspect, in certain implementations of the second aspect, in a case that the first time unit is determined according to the first indication information and a time unit index at which the terminal device receives the first indication information, the time unit offset indication information is included in the first indication information.
With reference to the second aspect, in some implementations of the second aspect, the first time unit is a time unit corresponding to a time unit index in which the time unit index of the terminal device receiving the first indication information and a time unit index in which the time unit offset is superimposed.
With reference to the second aspect, in certain implementations of the second aspect, in a case that the first time unit is determined according to the time unit for the terminal device to receive the first indication information and the first time period, the first time unit is a first uplink time unit after an end time of the terminal device to receive the first indication information is overlapped with the first time period.
With reference to the second aspect, in some implementations of the second aspect, the third indication information corresponds to the same PUCCH as HARQ-ACK information corresponding to a retransmission TB scheduled by the first indication information.
In a third aspect, a communication device is provided, which includes functional modules for implementing the method in any possible implementation manner of the first aspect.
In a fourth aspect, there is provided a communication device comprising functional means for implementing the method in any possible implementation manner of the second aspect.
In a fifth aspect, there is provided a communication device comprising a processor and an interface circuit, wherein the interface circuit is configured to receive signals from other communication devices except the communication device and transmit the signals to the processor or transmit the signals from the processor to other communication devices except the communication device, and the processor is configured to implement the method in any possible implementation manner of the first aspect by using logic circuits or executing code instructions.
In a sixth aspect, there is provided a communication device comprising a processor and an interface circuit, the interface circuit being configured to receive signals from a communication device other than the communication device and transmit the signals to the processor or transmit the signals from the processor to the communication device other than the communication device, the processor being configured to implement the method in any possible implementation manner of the foregoing second aspect by logic circuits or executing code instructions.
In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instructions are stored, which, when executed, implement the method in any possible implementation manner of the first aspect.
In an eighth aspect, a computer-readable storage medium is provided, in which a computer program or instructions are stored, which, when executed, implement the method in any possible implementation of the foregoing second aspect.
In a ninth aspect, there is provided a computer program product comprising instructions which, when executed, implement the method of any possible implementation of the first aspect.
A tenth aspect provides a computer program product comprising instructions that, when executed, implement the method of any possible implementation of the second aspect.
In an eleventh aspect, there is provided a computer program comprising code or instructions which, when executed, implement the method in any possible implementation of the first aspect described above.
In a twelfth aspect, there is provided a computer program comprising code or instructions that, when executed, implement the method of any possible implementation of the aforementioned second aspect.
In a thirteenth aspect, a chip system is provided, where the chip system includes a processor and may further include a memory, and is configured to implement the method in any possible implementation manner of the foregoing first aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
In a fourteenth aspect, a chip system is provided, where the chip system includes a processor and may further include a memory, and is configured to implement the method in any possible implementation manner of the foregoing second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
A fifteenth aspect provides a communication system comprising the apparatus of the third or fourth aspect.
Drawings
Fig. 1 is a diagram of a wireless communication system 100 suitable for use in embodiments of the present application.
Fig. 2 is a diagram of a wireless communication system 200 suitable for use in embodiments of the present application.
Fig. 3 is a schematic diagram of bits after different redundancy versions are coded, which is suitable for the embodiment of the present application.
Fig. 4 is a diagram illustrating a communication method 400 according to an embodiment of the disclosure.
Fig. 5 is a schematic block diagram of a communication device 500 provided in an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a communication apparatus 600 according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a simplified terminal device suitable for use in an embodiment of the present application.
Fig. 8 is a simplified base station structure diagram suitable for use in the embodiments of the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
The technical scheme of the embodiment of the application can be applied to various communication systems, for example: fifth generation (5 g) systems or New Radio (NR), long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal Mobile Telecommunications System (UMTS), etc. And cloud video source coding and decoding, rendering and the like, wherein network transmission comprises LTE, NR and a core network and an access network of a 6G air interface of a 6G system, and a terminal head displays equipment such as Virtual Reality (VR) glasses and the like.
For the understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application will be described in detail with reference to fig. 1.
Fig. 1 is a diagram of a wireless communication system 100 suitable for use in embodiments of the present application. As shown in fig. 1, the wireless communication system 100 may include at least one network device, such as the network device 111 shown in fig. 1, and the wireless communication system 100 may further include at least one terminal device, such as the terminal devices 121 to 123 shown in fig. 1. The network device and the terminal device can be configured with a plurality of antennas, and the network device and the terminal device can communicate by using a multi-antenna technology.
Fig. 2 is another schematic diagram of a wireless communication system 200 suitable for use in embodiments of the present application. As shown in fig. 2, the wireless communication system 100 may include at least one terminal device, such as the terminal device 211 shown in fig. 2, and the wireless communication system 100 may further include at least one network device, such as the network device 221 to the network device 223 shown in fig. 2. The network device and the terminal device can be configured with a plurality of antennas, and the network device and the terminal device can communicate by using a multi-antenna technology.
It should be understood that fig. 1 and 2 are only exemplary, and the present application is not limited thereto.
It should also be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. The interface between the network device and the terminal device may be a Uu interface (or referred to as an air interface). Of course, in future communications, the names of these interfaces may not be changed, or other names may be substituted, which is not limited in this application.
The network device is an access device that a terminal device accesses to a mobile communication system in a wireless manner, and may be a base station, an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The network device may comprise a Centralized Unit (CU), or a Distributed Unit (DU), or comprise a CU and a DU.
In the embodiment of the present application, the functions of the network device may also be implemented by a plurality of network function entities, where each network function entity is used to implement a part of the functions of the network device. These network functional entities may be network elements in a hardware device, or may be software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform).
Embodiments of the present application relate to terminal devices including devices that provide voice and/or data connectivity to a user, which may include, for example, handheld devices with wireless connectivity capabilities or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a vehicle-to-all (V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, an Access Point (AP), a remote terminal, an access terminal, a user agent, or user equipment, etc. For example, mobile telephones (otherwise known as "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-embedded mobile devices, and the like may be included. For example, personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. Also included are constrained devices such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, radio Frequency Identification (RFID), sensors, global Positioning Systems (GPS), laser scanners, and the like.
To facilitate understanding of the embodiments of the present application, a brief description of several terms referred to in the present application will be given below.
1. New data indication
And the UE reads a New Data Indicator (NDI) field from the DCI, and determines whether the PDSCH scheduled by the DCI carries the primary transmission TB or the retransmission TB according to the information of the NDI field.
If a TB is carried on the PDSCH, the NDI field is 1 bit; if 2 TBs are carried on the PDSCH, the NDI field is 2 bits, i.e., one TB per bit. Therefore, for one TB, the NDI only needs 1 bit, and it is indicated that the TB is a new transmission or a retransmission by whether the value of the NDI in the DCI received last time is inverted. Assuming that the value of the NDI of the DCI received last time is 0, if the DCI is the retransmission of the scheduling TB, the value of the NDI is still 0; and if the DCI is newly transmitted by the scheduling TB, the value of the NDI is 1. Assuming that the value of the NDI of the DCI received at the previous time is 1, if the current DCI is the retransmission of the scheduling TB, the value of the NDI is still 1; and if the DCI is newly transmitted by the scheduling TB, the value of the NDI is 0.
Generally, when the TB is initially transmitted, the value of the NDI is inverted, and the value of a Modulation and Coding Scheme (MCS) field is one of 0 to X-1, where the MCS field includes a Modulation mode and a code rate, a network device side selects an appropriate MCS value according to a channel condition and a performance index of data to be transmitted, and encodes and modulates the TB block to be transmitted by using the corresponding Modulation mode and code rate. When the TB is retransmitted, the NDI value remains unchanged, the value of the MCS field may be one of X to 31, that is, the retransmission may change the modulation scheme with respect to the initial transmission, and because the TB is also the same, the Transport Block Size (TBs) may not change, and the code rate may be obtained from the TBs, the modulation scheme, and the total time-frequency domain resources during the retransmission, without additional indication.
2. Redundancy version
Redundancy version (Redundancy version, RV): the design of the redundancy version is used for realizing Incremental Redundancy (IR) Hybrid automatic repeat request (HARQ) transmission, that is, after information bits and redundancy bits generated by an encoder are concatenated, a sequence is formed, each RV defines a transmission start point in the sequence, and different RVs are respectively used for first transmission and each HARQ retransmission so as to realize gradual accumulation of the redundancy bits and complete Incremental redundancy HARQ operation. During LTE studies, two RV quantities were considered: 4 and 8, and 4 RVs were determined after discussion. The definition of the RV is related to the size of a soft buffer (Softbuffer), the smaller of a transmitting end circular buffer and a receiving end soft buffer is selected, and 4 RVs are uniformly distributed in the range. The bits after channel coding are rate matched, i.e. repeated or punctured, to match the number of bits of the air interface resource. Rate matching may use different redundancy versions, which may contain different channel-coded bits.
Fig. 3 is a diagram of bits after different redundancy versions are coded, which is applicable to the embodiment of the present application. As shown in fig. 3, the code rate is R =3/4, the mother code rate is 1/3, ncb is the bit length after channel coding, so that the corresponding information bit length is 1/3Ncb, the number of empty bits is 4/3Ncb, and the coded bits corresponding to different redundancy versions (RV 0, RV1, RV2, RV 3) are shaded in the figure.
The information bits before the mother code coding are called system bits, and in the mother code coding with 1/3 code rate, the first 1/3 bits in the coded bit sequence are the system bits. In general, in the self-decoding process, (self-decoding means that the bits of the current RV version may be successfully decoded without combining the bits of other RV versions) the bits of the RV version need to include all systematic bits, and for RV versions not including all systematic bits, even if the channel conditions are good, it is difficult for the UE to successfully decode after reception.
Therefore, during primary transmission of the TB, bits of RV0 are usually used for transmission, so as to ensure that the primary transmission is correct as much as possible; during retransmission, bits of other RV versions can be selected, so that check bits different from RV0 can be sent, a receiving end can obtain information as much as possible after combining initial transmission information and retransmission information, and retransmission efficiency is improved.
3. PDSCH processing time
In NR, two user capabilities (UE processing capability 1 and UE processing capability 2) are defined for the processing time of PDSCH, i.e., the time required to receive feedback from PDSCH of HARQ-ACKs corresponding to TBs carried on the PDSCH.
Specifically, the end time of receiving PDSCH is up to the receiverThe period between transmission initial times of PUCCHs carrying corresponding HARQ-ACKs should not be less than T proc,1 ，T proc,1 ＝(N 1 +d 1,1 +d 2 )×(2048+144)·θ2 -μ ·T c +T ext . That is, the terminal device must be able to be at T proc,1 The receiving of the PDSCH is completed internally and the corresponding HARQ-ACK is generated, so that the strictest scheduling requirement can be met. Wherein, N 1 For the decoding time of PDSCH, as shown in the following table, table 1 is N in the case of UE processing capability 1 1 A value of (d); table 2 is N in case of UE processing capability 2 1 The value of (c).
TABLE 1
Figure BDA0003066905670000071
TABLE 2
Figure BDA0003066905670000072
Wherein, the second column of table 1 is applicable to a scenario in which a Demodulation reference signal (DMRS) is preloaded and no additional DMRS is configured, and the third column is applicable to a scenario in which a DMRS is preloaded and an additional DMRS is configured; the UE corresponding to table 2 is a device with a relatively high processing capability, and at this time, the additional DMRS is not allowed to be configured.
μ in the table corresponds to different subcarrier spacings, 0 means 15khz,1 means 30khz,2 means 60khz, and 3 means 120kHz. Because the whole process involves the PDSCH carrying downlink data, the PDCCH where the DCI scheduling the PDSCH is located, and the PUCCH or PUSCH where the HARQ-ACK corresponding to the PDSCH is located, and the subcarrier intervals of the downlink/uplink carriers where the channels are located may be different, in this case, the value of mu is set so that T is equal to proc，1 The subcarrier spacing with the largest value.
d 1，1 The processing time introduced by the overlapping situation of the PDCCH and the PDSCH is considered to be relaxed, because the UE needs to receive the PDCCH first and decode and resolve the DCI carried on the PDCCH to acquire the position of the PDSCH and the related physical layer parameters, and thenSince the PDSCH is demodulated and decoded, the processing speed of the PDSCH is affected by the overlap of the two. For the case of PDSCH mapping relation B, d 1，1 Is taken as follows
D is greater than or equal to 7 when the number of symbols of PDSCH 1，1 ＝0；
D is greater than or equal to 3 and less than or equal to 6 when the number of symbols of PDSCH or the like 1，1 Equal to the number of symbols where the PDSCH overlaps with the PDCCH that schedules the PDSCH;
when the number of symbols of the PDSCH is equal to 2, if the PDCCH scheduling the PDSCH is on a CORESET of 3 symbol length and the CORESET is the same as the starting symbol of the PDSCH, d 1，1 =3, otherwise, d 1，1 Is equal to the number of symbols where the PDSCH overlaps the PDCCH that schedules the PDSCH.
d, parameters introduced when uplink channels with different priorities are overlapped are considered, and the method is irrelevant to the application.
In NR systems, T c Is a unit of time, and T c ＝1/Δf max ·N f Wherein, Δ f max ＝480*10 3 HZ，；N f ＝4096；θ＝T s /T C =64, wherein, T s ＝1/(Δf ref ·N f，ref )，Δf ref ＝15·10 3 HZ，N f，ref ＝2048。
T ext The number of the shared spectrum channels is 1 in the access process, and the number of the other scenes is 0.
In the actual transmission process, due to noise and interference in the wireless environment, the UE may have a phenomenon of reception error for the PDCCH and the PDSCH.
For PDSCH, after receiving PDSCH, UE demodulates and decodes TB carried on PDSCH and feeds back corresponding HARQ-ACK information to a network side. And ACK is fed back when the decoding is successful, and NACK is fed back when the decoding is failed. HARQ-ACK information for multiple PDSCHs may be combined together for feedback, i.e., HARQ-ACK Codebook (CB). In the NR system, the R15 version has two codebooks, namely a Type-1 HARQ-ACK codebook and a Type-2HARQ-ACK codebook, which can be respectively called as a semi-static codebook and a dynamic codebook.
In the case of using the semi-static codebook, a user may obtain all possible positions of the PDSCH through high-level configuration information, and the user may perform feedback for all possible PDSCHs, and may feedback ACK when receiving accurately, and feedback NACK when receiving an error or not.
In the case of using the dynamic codebook, a user may determine whether a PDCCH for scheduling the PDSCH is missed through a Downlink Assignment Index (DAI) in Downlink control information carried by the PDCCH, and if the PDCCH is missed, the user may also feed back NACK at a corresponding position in the codebook.
For the PDCCH, the user does not perform a targeted feedback on whether the feedback is received or not or whether the feedback is correct, but only performs the feedback in the HARQ-ACK codebook for the PDSCH. As described above, if the UE does not receive or does not correctly receive the PDCCH, the UE may feed back a NACK at a HARQ-ACK feedback position corresponding to the PDSCH in the HARQ-ACK codebook for the PDSCH.
For the base station, when it receives NACK fed back by the UE, there is no way to determine whether the UE has failed to receive PDSCH or failed to receive PDCCH (i.e., has not received PDSCH at all). After receiving the NACK fed back by the UE, the base station usually initiates retransmission for the PDSCH, so that the UE can correctly receive the TB on the PDSCH through multiple retransmission and combining.
In this regard, the present application provides an information feedback method, so that after receiving DCI scheduled for retransmission, a UE adds a feedback in addition to a conventional HARQ-ACK message to indicate whether it receives DCI scheduled for initial transmission.
Fig. 4 is a diagram illustrating a communication method 400 according to an embodiment of the present application. As shown in fig. 4, the method 400 may include the steps of:
s401, the network equipment sends first indication information to the terminal equipment. Correspondingly, the terminal equipment receives the first indication information sent by the network equipment.
For example, the network device may transmit first indication information to the terminal device, the first indication information indicating a TB in which retransmission is scheduled. Further, the first indication information may be carried in DCI.
S402, the terminal equipment judges whether the second indication information is received.
For example, the terminal device may determine whether second indication information indicating a TB scheduled for initial transmission has been received. If the network device has sent the second indication information, the time for sending the second indication information will be prior to the time for sending the first indication information. Further, the second indication information may be carried in DCI.
Specifically, the terminal device determines that the second message is not received in a case where a preset condition is satisfied. Wherein the preset condition comprises at least one of the following conditions: the terminal equipment receives indication information which is used for scheduling the initial transmission of the TB and is not received between the fourth indication information and the first indication information, the value of the NDI of the first indication information and the value of the NDI of the fourth indication information are overturned, and the HARQ process number of the first indication information is the same as the HARQ process number of the fourth indication information, wherein the fourth indication information is used for scheduling the initial transmission or retransmission of the previous TB of the TB, and the receiving time of the fourth indication information is prior to the receiving time of the first indication information.
For example, when the first indication information is carried in DCI, the terminal device may first determine, according to an MCS index value carried in the first indication information, whether a TB scheduled by the first indication information is an initial TB or a retransmitted TB.
For example, when the MCS carried by the first indication information is 0 to X-1, the first indication information is scheduled to be the TB that is transmitted for the first time; when the MCS carried by the first indication information is X to 31, the TB scheduled by the first indication information is a retransmitted TB.
When the modulation mode corresponding to the MCS table carried by the first indication information does not include 64QAM (i.e., the modulation mode only includes QPSK, 16QAM and 64 QAM), X is equal to 29; when the modulation scheme corresponding to the MCS table carried by the first indication information includes 64QAM (i.e., the modulation schemes include QPSK, 16QAM, 64QAM, and 256 QAM), X is equal to 28.
Next, when the terminal device determines that the first indication information is indication information indicating a TB in which retransmission is scheduled, whether the network device has transmitted the second indication information may be determined according to a relationship between a value of an NDI of the first indication information and a value of an NDI of the fourth indication information.
For example, if the value of the NDI in the first indication information and the value of the NDI in the fourth indication information are flipped, it indicates that the network device has sent the second indication information, that is, the indication information for indicating the TB for scheduling the initial transmission before receiving the first indication information, but the terminal device does not receive the second indication information; if the value of the NDI in the first indication information and the value of the NDI in the fourth indication information are not inverted, it indicates that the terminal device has not failed to receive the second indication information.
And S403, the terminal device sends third indication information to the network device. Correspondingly, the network device receives the third indication information sent by the terminal device.
In one possible implementation manner, when the terminal device determines that the second indication information is not received according to the first indication information and the fourth indication information, third indication information may be sent to the network device, where the third indication information is used to indicate that the terminal device does not receive the second indication information.
Alternatively, the third indication information may not be fed back together with the HARQ-ACK information corresponding to the PDSCH, i.e., the third indication information corresponds to a different PUCCH than the HARQ-ACK information.
For example, the terminal device may perform feedback according to 1 bit carried by the third indication information, and when the bit is 0, it indicates that the terminal device does not receive the second indication information; when the bit is 1, it indicates that the terminal device has received the second indication information.
For example, the terminal device may perform feedback according to a preconfigured sequence in the third indication information, and when the third indication information includes the preconfigured first sequence, it indicates that the terminal device has received the second indication information; and when the third indication information comprises the pre-configured second sequence, the terminal equipment is indicated not to receive the second indication information.
For example, the terminal device may perform feedback according to whether the third indication information is sent, and when the third indication information is sent, it indicates that the terminal device has received the second indication information; and when the third indication information is not sent, the terminal equipment is indicated not to receive the second indication information.
The time interval between the end time of receiving the first indication information by the terminal equipment and the start time of sending the third indication information by the terminal equipment is greater than or equal to a first time period, and the first time period may be less than or equal to a second time period, where the first time period is the shortest time required by the terminal equipment for the PDCCH receiving and decoding process, and the second time period is the shortest time between the end time of receiving the PDSCH by the terminal equipment and the start time of sending HARQ-ACK information corresponding to the TB carried on the PDSCH. Because, the terminal device may determine whether it missed the DCI carrying the second indication information after receiving and parsing the first indication information. In general, in the same situation, the terminal device has a simpler PDCCH reception and decoding process than PDSCH reception and decoding process, and therefore requires a shorter processing time. Thus, the first period of time may be equal to the second period of time. The first time period may be predefined by a protocol, different values may be selected at different subcarrier intervals, and a value may be smaller than or equal to the second time period.
In addition, the terminal device sends third indication information to the network device at the first time unit, where the first time unit may be in any form of:
(1) And sending the time unit of the HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information. Further, when the third indication information is in the same time unit as the HARQ-ACK information corresponding to the retransmission TB scheduled by sending the first indication information, no new time unit offset indication information needs to be added, and the time unit for sending the HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information is the first time unit. Wherein, the offset is the offset between the time unit of the HARQ-ACK information corresponding to the retransmission TB which is scheduled by sending the first indication information and the time unit of the third indication information;
(2) The time unit offset indication information is determined according to the time unit index of the terminal equipment receiving the first indication information. Further, time unit offset indication information is included in the first indication information, the time unit offset indication information indicating an offset of a time unit. For example, the first time unit is a time unit corresponding to a time unit index in which the terminal device receives the first indication information and a time unit index in which an offset of the time unit is superimposed.
In addition, the time unit offset indication information can also be carried in the higher layer signaling.
(3) The time unit and the first time period of the terminal equipment for receiving the first indication information are determined. Further, the first time unit may be a first uplink time unit after the terminal device receives the end time of the first indication information and the first time period are overlapped.
It should be appreciated that in the above scheme, the time unit may be a time slot, a sub-slot, or a set of N Orthogonal Frequency Division Multiplexing (OFDM) symbols. In the NR system, in the case of a normal CP (normal CP), one slot may contain 14 OFDM symbols, and one sub-slot may contain 2 or 7 OFDM symbols; in case of extended CP, one slot may contain 12 OFDM symbols, and one sub-slot may contain 2 or 6 OFDM symbols. If the time unit is a set of N OFDM symbols, N is predefined by the protocol or configured by the network device.
Wherein, the OFDM symbols in one slot or sub-slot may be all used for uplink transmission; can be used for downlink transmission; or a part of the downlink control information may be used for downlink transmission, a part of the downlink control information may be used for uplink transmission, and a part of the downlink control information may be reserved for no transmission, or the network device may dynamically issue the downlink control information to determine whether the downlink control information is uplink transmission or downlink transmission. The above examples are merely illustrative, and should not be construed as limiting the present invention in any way. The format of the time cell is not limited to the above example for system forward compatibility considerations.
It should also be understood that, regarding the determination of the PUCCH resource of the third indication information, the network device may notify one dedicated PUCCH resource through the fifth indication information as the PUCCH resource of the third indication information. Further, the fifth indication information may be carried in a higher layer signaling; in addition, the network device may also configure one PUCCH resource set through higher layer signaling, and determine one PUCCH resource in the PUCCH resource set through the PUCCH resource index information included in the first indication information as the PUCCH resource of the third indication information. The PUCCH resource index information may share the same indication field with HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information, or may be a new indication field.
Optionally, the third indication information may be fed back together with HARQ-ACK information corresponding to a retransmitted TB scheduled by the first indication information, that is, the third indication information corresponds to a PUCCH that is the same as the HARQ-ACK information, and the specific PUCCH resource indication manner may be an HARQ-ACK codebook indication manner corresponding to the retransmitted TB scheduled by the first indication information. That is, the indication information field of the third indication information and the HARQ-ACK codebook corresponding to the retransmission TB scheduled by the first indication information are cascaded together and fed back.
For example, the start bit of the third indication information may be after the end bit of HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information. For example, the HARQ-ACK has M bits, and the third indication information has N bits, so that the concatenated bit sequence is M + N bits, and the M + N bits are channel-coded together and carried to one PUCCH resource for transmission. Wherein M and N are positive integers.
It should be understood that, based on the above scheme, when the terminal device determines that DCI carrying the second indication information is missed, HARQ-NACK information may be fed back directly without processing resources of a PDSCH corresponding to the first indication information; and if the terminal equipment determines that the DCI carrying the second indication information is not missed, normally processing the resources of the PDSCH corresponding to the first indication information.
In another possible implementation manner, in a case that the terminal device determines that the second indication information is received according to the first indication information and the fourth indication information, the terminal device may send third indication information to the network device, where the third indication information is used to indicate that the terminal device has received the second indication information.
Specifically, the terminal device may send third indication information for the second indication information to the network device, where the third indication information may be HARQ-ACK information corresponding to the second indication information. For the description about the first time unit for sending the third indication information, the determination of the PUCCH resource, and whether to feed back the HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information, reference may be made to the above related description, and for brevity, this application is not described herein again.
In addition, the terminal device may also send the third indication information to the network device in the form of RRC signaling.
S404, the network device sends sixth indication information to the terminal device. Correspondingly, the terminal device receives the sixth indication information sent by the network device.
Optionally, after the network device receives third indication information indicating that the terminal device does not receive the second indication information, sixth indication information may be sent to the terminal device, where the sixth indication information is used to schedule the initial transmission of the TB.
In one possible implementation manner, if the network device has already transmitted the resources of the PDSCH corresponding to the retransmitted TB, the network device may retransmit the TB in the initial scheduling manner to the terminal device when the HARQ-ACK information corresponding to the PDSCH is not received.
In another possible implementation manner, if the network device does not send the resources of the PDSCH corresponding to the retransmitted TB, the network device may not send the resources, and change the scheduling manner to the initial transmission scheduling manner to send the TB.
It should be understood that, if the third indication information indicates that the terminal device has received the second indication information, the network device may continue to transmit resources of the PDSCH corresponding to the retransmission TB and receive HARQ-ACK information corresponding to the PDSCH.
In addition, if the terminal device does not receive the second indication information, the terminal device cannot acquire TBs information of the TB, and cannot decode correctly, even if the terminal device receives the TBs retransmitted for multiple times, the terminal device cannot decode successfully. Therefore, after knowing that the terminal device does not receive the second indication information, the network device can send the TB to the terminal device in a primary transmission scheduling manner, so that the terminal device can obtain information of the TBs corresponding to the TB, thereby improving the probability of successful decoding.
Based on the above scheme, the terminal device may send third indication information to the network device to inform the network device whether to receive the second indication information. If the third indication information indicates that the terminal device does not receive the second indication information, the network device may adjust the scheduling of the TB, so as to avoid an error condition that the network device still sends and schedules the TB for multiple times after the terminal device does not receive the second indication information, thereby improving the network performance. And the network equipment sends the TB to the terminal equipment in a primary transmission scheduling mode, so that the terminal equipment can correctly receive the TB in a retransmission scheduling mode, and the success rate of self-decoding is improved.
The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic, all of which are contemplated to fall within the scope of the present application.
It is to be understood that, in the foregoing method embodiments, the method and the operation implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) available to the terminal device, and the method and the operation implemented by the network device may also be implemented by a component (e.g., a chip or a circuit) available to the network device.
The method provided by the embodiment of the present application is described in detail above with reference to fig. 4. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to fig. 5 to 8. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.
The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that each network element, for example, the transmitting end device or the receiving end device, includes a corresponding hardware structure and/or software module for performing each function in order to implement the above functions. Those of skill in the art would appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the functional modules may be divided according to the above method example for the transmitting end device or the receiving end device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The following description will be given by taking an example in which each function module is divided for each function.
Fig. 5 is a schematic block diagram of a communication device 500 provided in an embodiment of the present application. The communication device 500 comprises a transceiver unit 510 and a processing unit 520. The transceiving unit 510 may implement corresponding communication functions, and the processing unit 510 is configured to perform data processing. The transceiving unit 510 may also be referred to as a communication interface or a communication unit.
Optionally, the communication device 500 may further include a storage unit, which may be used to store instructions and/or data, and the processing unit 520 may read the instructions and/or data in the storage unit, so as to enable the communication device to implement the foregoing method embodiments.
The communication apparatus 500 may be configured to perform the actions performed by the terminal device in the foregoing method embodiments, in this case, the communication apparatus 500 may be a terminal device or a component configurable in the terminal device, the transceiver unit 510 is configured to perform the operations related to transceiving on the terminal device side in the foregoing method embodiments, and the processing unit 520 is configured to perform the operations related to processing on the terminal device side in the foregoing method embodiments.
For example, when the communication apparatus 500 is used to implement the functions of the terminal device in the method 400 embodiment in fig. 4, the transceiver unit 510 is used to: s401, S403 and S404; the processing unit 520 is configured to: and S402.
For more detailed description of the transceiver unit 510 and the processing unit 520, reference may be made to the related description of the method 400 in fig. 4, which is not repeated herein.
As another design, the communication apparatus 500 may be configured to perform the actions performed by the network device in the foregoing method embodiment, in this case, the communication apparatus 500 may be a network device or a component configurable in the network device, the transceiver unit 510 is configured to perform the operations related to transceiving on the network device side in the foregoing method embodiment, and the processing unit 520 is configured to perform the operations related to processing on the network device side in the foregoing method embodiment.
For example, when the communication apparatus 500 is used to implement the functions of the network device in the method 400 embodiment in fig. 4, the transceiving unit 510 is used in S401, S403, and S404.
For more detailed description of the transceiver unit 510 and the processing unit 520, reference may be made to the related description of the method 400 in fig. 4, which is not repeated herein.
The processing unit 520 in the above embodiments may be implemented by at least one processor or processor-related circuitry. The transceiver unit 510 may be implemented by a transceiver or transceiver-related circuitry. The transceiving unit 510 may also be referred to as a communication unit or a communication interface. The storage unit may be implemented by at least one memory.
As shown in fig. 6, an embodiment of the present application further provides a communication apparatus 600. The communication device 600 comprises a processor 66, the processor 66 being coupled to a memory 620, the memory 620 being adapted to store computer programs or instructions and/or data, the processor 66 being adapted to execute the computer programs or instructions and/or data stored by the memory 620 such that the method in the above method embodiments is performed.
Optionally, the communication device 600 includes one or more processors 66.
Optionally, as shown in fig. 6, the communication device 600 may further include a memory 620.
Optionally, the communication device 600 may include one or more memories 620.
Alternatively, the memory 620 may be integrated with the processor 66 or provided separately.
Optionally, as shown in fig. 6, the communication device 600 may further include a transceiver 630, and the transceiver 630 is used for receiving and/or transmitting signals. For example, processor 66 may be configured to control transceiver 630 to receive and/or transmit signals.
As an approach, the communication apparatus 600 is used to implement the operations performed by the terminal device in the above method embodiments.
For example, processor 66 is configured to implement processing-related operations performed by the terminal device in the above method embodiments, and transceiver 630 is configured to implement transceiving-related operations performed by the terminal device in the above method embodiments.
Alternatively, the communication apparatus 600 is used to implement the operations performed by the network device in the above method embodiments.
For example, processor 66 is configured to implement processing-related operations performed by a network device in the above method embodiments, and transceiver 630 is configured to implement transceiving-related operations performed by a network device in the above method embodiments.
The embodiment of the present application further provides a communication apparatus 700, where the communication apparatus 700 may be a terminal device or a chip. The communication apparatus 700 may be configured to perform the operations performed by the terminal device in the above method embodiments.
When the communication apparatus 700 is a terminal device, fig. 7 illustrates a schematic structural diagram of a simplified terminal device according to an embodiment of the present application. As shown in fig. 7, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.
When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 7, and one or more processors and one or more memories may be present in an actual end device product. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device.
As shown in fig. 7, the terminal device includes a transceiving unit 710 and a processing unit 720. The transceiving unit 710 may also be referred to as a transceiver, a transceiving means, etc. Processing unit 720 may also be referred to as a processor, processing board, processing module, processing device, or the like.
Alternatively, a device for implementing a receiving function in the transceiving unit 710 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 710 may be regarded as a transmitting unit, that is, the transceiving unit 710 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiver circuit, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.
For example, the processing unit 720 is configured to execute the processing actions of the terminal device in fig. 4; the transceiver 710 is configured to perform transceiving operations on the terminal device side in fig. 4.
It should be understood that fig. 7 is only an example and not a limitation, and the terminal device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 7.
When the communication device 700 is a chip, the chip includes a transceiving unit and a processing unit. The transceiving unit can be an input/output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.
The embodiment of the present application further provides a communication apparatus 800, where the communication apparatus 800 may be a network device or a chip. The communication apparatus 800 may be used to perform the operations performed by the network device in the above method embodiments.
When the communication apparatus 800 is a network device, it is a base station, for example. Fig. 8 shows a simplified base station structure diagram provided in an embodiment of the present application. The base station includes a portion 810 and a portion 820. The 810 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 820 section is mainly used for baseband processing, base station control, and the like. Portion 810 may be generally referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc. Part 820 is generally a control center of the base station, and may be generally referred to as a processing unit, for controlling the base station to perform the processing operations on the network device side in the above method embodiments.
The transceiver unit of section 810, which may also be referred to as a transceiver or transceiver, includes an antenna and radio frequency circuitry, where the radio frequency circuitry is primarily used for radio frequency processing. Alternatively, a device for implementing a receiving function in the section 810 may be regarded as a receiving unit, and a device for implementing a transmitting function may be regarded as a transmitting unit, that is, the section 810 includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, a receiving circuit, or the like, and the sending unit may be referred to as a transmitter, a transmitting circuit, or the like.
Portion 820 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control of the base station. If a plurality of single boards exist, the single boards can be interconnected to enhance the processing capacity. As an alternative implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.
For example, the transceiving unit of part 810 is configured to perform transceiving-related steps performed by the network device in the embodiment shown in fig. 4.
It should be understood that fig. 8 is only an example and not a limitation, and the network device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 8.
When the communication device 800 is a chip, the chip includes a transceiving unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.
Embodiments of the present application also provide a computer-readable storage medium, on which computer instructions for implementing the method performed by the terminal device or the method performed by the network device in the foregoing method embodiments are stored.
For example, the computer program, when executed by a computer, causes the computer to implement the method performed by the terminal device or the method performed by the network device in the above-described method embodiments.
Embodiments of the present application also provide a computer program product containing instructions, where the instructions, when executed by a computer, cause the computer to implement the method performed by the terminal device or the method performed by the network device in the foregoing method embodiments.
An embodiment of the present application further provides a communication system, where the communication system includes the network device and the terminal device in the foregoing embodiments.
It is clear to those skilled in the art that for convenience and brevity of description, any explanation and advantages related to the above-mentioned communication apparatus may refer to the corresponding method embodiments provided above, and are not repeated herein.
In the embodiment of the present application, the terminal device or the network device may include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on the operating system layer. The hardware layer may include hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer may include applications such as a browser, an address book, word processing software, and instant messaging software.
The embodiment of the present application does not particularly limit a specific structure of an execution subject of the method provided by the embodiment of the present application, as long as communication can be performed by the method provided by the embodiment of the present application by running a program in which codes of the method provided by the embodiment of the present application are recorded. For example, an execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling a program and executing the program in the terminal device or the network device.
Various aspects or features of the disclosure may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media.
The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The available media (or computer-readable media) may include, for example but not limited to: magnetic or magnetic storage devices (e.g., floppy disks, hard disks (e.g., removable hard disks), magnetic tapes), optical media (e.g., compact disks, CD's, digital Versatile Disks (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memories (EPROM), cards, sticks, or key drives, etc.), or semiconductor media (e.g., solid State Disks (SSD), usb disks, read-only memories (ROMs), random Access Memories (RAMs), etc.) that may store program code.
Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to: wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.
It should be understood that the processor referred to in the embodiments of the present application may be a Central Processing Unit (CPU), and may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) 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.
It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM). For example, RAM can be used as external cache memory. By way of example and not limitation, RAM may include the following forms: static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and direct bus RAM (DR RAM).
It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) may be integrated into the processor.
It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the above-described units is only one type of logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. Furthermore, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the scheme provided by the application.
In addition, functional units in the embodiments of the present application may be integrated into one unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof.
When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. For example, the computer may be a personal computer, a server, or a network appliance, among others. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.). With regard to the computer-readable storage medium, reference may be made to the above description.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims and the specification.

Claims (21)

1. A method for information feedback, comprising:
the method comprises the steps that terminal equipment receives first indication information sent by network equipment, wherein the first indication information is used for scheduling retransmission of a Transport Block (TB);
the terminal equipment judges whether second indication information is received or not, wherein the second indication information is used for scheduling the initial transmission of the TB;
and the terminal equipment sends third indication information to the network equipment, wherein the third indication information is used for indicating whether the terminal equipment receives the second indication information.
2. The method of claim 1, wherein the determining, by the terminal device, whether the second indication information has been received comprises:
and under the condition that a preset condition is met, the terminal equipment judges that the second indication information is not received, wherein the preset condition comprises at least one of the following items:
the terminal device receives indication information which is used for scheduling initial transmission of the TB and is not received between fourth indication information and the first indication information, the value of New Data Indication (NDI) of the first indication information and the value of the NDI of the fourth indication information are overturned, and the HARQ process number of the first indication information is the same as the HARQ process number of the fourth indication information, wherein the fourth indication information is used for scheduling initial transmission or retransmission of a previous TB of the TB, and the receiving time of the fourth indication information is prior to the receiving time of the first indication information.
3. The method according to claim 1 or 2, wherein a time interval between an end time at which the terminal device receives the first indication information and a start time at which the terminal device transmits the third indication information is greater than or equal to a first time period, the first time period is less than or equal to a second time period, and the second time period is a shortest time between the end time at which the terminal device receives the PDSCH and the start time at which the hybrid automatic repeat request acknowledgement HARQ-ACK information corresponding to the TB carried on the PDSCH is transmitted.
4. The method according to any one of claims 1 to 3, wherein the terminal device sends third indication information to the network device, including:
the terminal device sends the third indication information to the network device at a first time unit, wherein,
the first time unit is a time unit for sending HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information, or
The first time unit is determined according to the time unit offset indication information and the time unit index of the terminal equipment for receiving the first indication information, the time unit offset indication information indicates the offset of the time unit, or
The first time unit is determined according to the time unit of the terminal equipment for receiving the first indication information and the first time period.
5. The method according to claim 4, wherein the time unit offset indication information is included in the first indication information if the first time unit is determined according to the first indication information and a time unit index of the terminal device receiving the first indication information.
6. The method according to claim 4 or 5, wherein the first time unit is a time unit corresponding to the time unit index of the terminal device receiving the first indication information and the time unit index superposed with the time unit offset.
7. The method according to claim 4, wherein the first time unit is a first uplink time unit after an end time of the terminal device receiving the first indication information is overlapped with the first time period, where the first time unit is determined according to the time unit of the terminal device receiving the first indication information and the first time period.
8. The method according to claim 1 or 2, wherein the third indication information corresponds to the same PUCCH as HARQ-ACK information corresponding to a retransmission TB retransmission scheduled by the first indication information.
9. A method for information feedback, comprising:
the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for scheduling retransmission of the TB;
the network device receives third indication information sent by the terminal device, where the third indication information is used to indicate whether the terminal device has received second indication information, where the second indication information is used to schedule the initial transmission of the TB, and the sending time of the second indication information is earlier than the sending time of the first indication information.
10. The method of claim 9, further comprising:
and the network equipment sends fourth indication information to the terminal equipment, wherein the fourth indication information is used for scheduling the initial transmission or retransmission of the previous TB of the TB.
11. The method according to claim 9 or 10, wherein the network device receives third indication information sent by the terminal device, and includes:
the network device receives the third indication information sent by the terminal device in a first time unit, wherein,
the first time unit is a time unit for sending HARQ-ACK information corresponding to the retransmission TB scheduled by the first indication information, or
The first time unit is determined according to the time unit offset indication information and the time unit index of the terminal equipment for receiving the first indication information, the time unit offset indication information indicates the offset of the time unit, or
The first time unit is determined according to the time unit of the terminal equipment for receiving the first indication information and the first time period.
12. The method according to claim 11, wherein the time unit offset indication information is included in the first indication information if the first time unit is determined according to the first indication information and a time unit index of the terminal device receiving the first indication information.
13. The method according to claim 11 or 12, wherein the first time unit is a time unit corresponding to a time unit index of the terminal device receiving the first indication information and a time unit index superposed with the time unit offset.
14. The method according to claim 11, wherein the first time unit is a first uplink time unit after an end time of receiving the first indication information by the terminal device overlaps with the first time period, where the first time unit is determined according to the time unit of receiving the first indication information by the terminal device and the first time period.
15. The method according to claim 9 or 10, wherein the third indication information corresponds to the same PUCCH as HARQ-ACK information corresponding to a retransmission TB scheduled by the first indication information.
16. A communications device comprising means for performing the method of any of claims 1 to 8, or 9 to 15.
17. A communications apparatus comprising a processor and a memory, the processor and the memory coupled, the processor configured to control the apparatus to implement the method of any of claims 1 to 8, or 9 to 15.
18. A communications device comprising a processor and interface circuitry for receiving and transmitting signals from or sending signals to other communications devices than the communications device, the processor being arranged to implement the method of any one of claims 1 to 8, or 9 to 15 by means of logic circuitry or executing code instructions.
19. A computer-readable storage medium, in which a computer program or instructions are stored which, when executed by a communication apparatus, carry out the method of any one of claims 1 to 8, or 9 to 15.
20. A computer program product, characterized in that it comprises instructions which, when executed by a computer, implement the method according to any one of claims 1 to 8, or 9 to 15.
21. A chip comprising a processor and a data interface, the processor reading instructions stored on a memory through the data interface to perform the method of any one of claims 1 to 8, or 9 to 15.
CN202110528193.8A 2021-05-14 2021-05-14 Information feedback method and device Pending CN115348679A (en)

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