WO2018000841A1 - Indication method for harq retransmission and related device - Google Patents

Abstract

Provided in the embodiments of the present invention are an indication method for a HARQ retransmission and a related device. The method comprises: a base station receiving, in the process that a licensed spectrum assists an unlicensed spectrum in performing an uplink non-adaptive HARQ, a signal transmitted upward by a terminal on a PUSCH corresponding to a target transmission block; the base station decoding the signal transmitted upward by the terminal to obtain a decoding result; the base station generating, according to the decoding result, DCI of a target format, the DCI of the target format being used for indicating whether the terminal needs to perform an uplink non-adaptive HARQ retransmission; the base station sending to the terminal, by means of a PDCCH, the DCI of the target format, such that the terminal parses the DCI of the target format to determine whether to perform an uplink non-adaptive HARQ retransmission of the target transmission block. By means of implementing the embodiments of the present invention, the indication of an uplink non-adaptive HARQ retransmission can be performed by means of adding a new DCI format.

Description

Method for indicating HARQ retransmission and related equipment Technical field

The present invention relates to the field of communications technologies, and in particular, to an indication method and related device for HARQ retransmission.

Background technique

With the popularity of user equipment and the dramatic increase in communication traffic, licensed spectrum is increasingly insufficient to provide higher network capacity. In order to meet the growing network demand, expanding the use of unlicensed spectrum based on licensed spectrum has become an important feasible direction. The 3GPP (3rd Generation Partnership Project) organization proposed LAA (Licensed Assisted Access) technology to enable the use of unlicensed spectrum resources with the assistance of licensed spectrum. In order to make the licensed spectrum and the unlicensed spectrum coexist better, the LBT (Listen Before Talk) mechanism is introduced in the LAA system, that is, the channel state is monitored before the data transmission, and whether the channel to be used is determined is Already occupied, the channel can be transmitted on the idle channel without being occupied, otherwise no transmission will be performed.

Currently, in the LTE (Long Term Evolution) system, the PHICH (Physical Hybrid-ARQ Indicator Channel) is required in the uplink non-adaptive HARQ (Hybrid Automatic Repeat ReQuest) transmission process. Downlink feedback is performed on the automatic retransmission indication channel to indicate whether retransmission is required. However, in the LAA system, since the LBT mechanism is introduced, it is impossible to ensure that the uplink or downlink transmission can be performed. Therefore, the 3GPP has decided to cancel the downlink feedback of the PHICH channel in the LAA system, and therefore cannot use the PHICH channel to indicate whether the uplink HARQ is needed. Retransmit. Based on the above problems, how to perform uplink non-adaptive HARQ retransmission in the LAA system is a key issue that needs to be solved.

Summary of the invention

The embodiment of the present invention provides a method for indicating a HARQ retransmission and a related device, which can perform an indication of uplink non-adaptive HARQ retransmission by adding a new DCI format.

A first aspect of the embodiments of the present invention provides a method for indicating a hybrid automatic repeat request (HARQ) retransmission, including:

And transmitting, by the base station, a signal that is uplinked by the terminal on the physical uplink shared channel PUSCH corresponding to the target transport block in the uplink non-adaptive HARQ process of the licensed spectrum-assisted unlicensed spectrum;

The base station decodes the signal uplinked by the terminal to obtain a decoding result;

The base station generates, according to the decoding result, downlink control information DCI in a target format, where the DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission;

Transmitting, by the base station, the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether the uplink non-self is performed on the target transport block. Adapt to HARQ retransmissions.

A second aspect of the embodiments of the present invention provides a method for indicating a hybrid automatic repeat request (HARQ) retransmission, including:

The terminal uplinks a signal to the base station on the physical uplink shared channel (PUSCH) corresponding to the target transport block, so that the base station decodes the signal that is uplinked by the terminal, and generates downlink control information DCI in the target format according to the decoding result. The DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission;

Receiving, by the terminal, the DCI of the target format sent by the base station by using a physical downlink control channel PDCCH;

The terminal parses the DCI of the target format to determine whether the uplink non-adaptive HARQ retransmission is performed on the target transport block.

A third aspect of the embodiments of the present invention provides a base station, including:

a receiving unit, configured to receive, by the receiving terminal, a signal that is uplinked on the physical uplink shared channel PUSCH corresponding to the target transport block in the uplink non-adaptive HARQ process in the licensed spectrum-assisted unlicensed spectrum;

a decoding unit, configured to decode the signal uplinked by the terminal to obtain a decoding result;

a generating unit, configured to generate, according to the decoding result, downlink control information DCI in a target format, where the DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission;

a sending unit, configured to send the target to the terminal by using a physical downlink control channel PDCCH Formatted DCI, such that the terminal parses the DCI of the target format to determine whether the uplink non-adaptive HARQ retransmission is performed on the target transport block.

A fourth aspect of the embodiments of the present invention provides a terminal, including:

a sending unit, configured to: perform uplink transmission of a signal to the base station on the physical uplink shared channel (PUSCH) corresponding to the target transport block, so that the base station decodes the signal, and generate downlink control information (DCI) of the target format according to the decoding result, where The DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission;

a receiving unit, configured to receive a DCI of the target format sent by the base station by using a physical downlink control channel PDCCH;

And a parsing unit, configured to parse the DCI of the target format to determine whether the uplink non-adaptive HARQ retransmission is performed on the target transport block.

In the embodiment of the present invention, the base station performs the uplink non-adaptive HARQ process in the licensed spectrum-assisted unlicensed spectrum, and decodes the signal after receiving the uplink uplink signal on the physical uplink shared channel PUSCH corresponding to the target transport block. Obtaining a decoding result, and generating downlink control information DCI of the target format according to the decoding result, the base station may send the DCI of the target format to the terminal by using the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine Whether uplink non-adaptive HARQ retransmission is performed on the target transport block. It can be seen that, in the embodiment of the present invention, in a system for granting spectrum-assisted unlicensed spectrum, the base station can generate a DCI in a new format due to the introduction of the LBT mechanism, such that the PHICH channel does not perform downlink feedback during uplink HARQ transmission. The information is transmitted through the PDCCH channel to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;

2 is a schematic flowchart of a method for indicating HARQ retransmission according to an embodiment of the present invention;

3 is a schematic diagram of a process of uplink non-adaptive HARQ transmission according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart diagram of another method for indicating HARQ retransmission according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of still another base station according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of still another terminal according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An embodiment of the present invention provides a method for indicating a HARQ retransmission and a related device. In a system for granting a spectrum-assisted unlicensed spectrum, the PHICH channel does not perform downlink feedback during uplink HARQ transmission due to the introduction of the LBT mechanism. The base station may generate DCI information in a new format and transmit it through the PDCCH channel to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. The details are described below separately.

For a better understanding of the embodiments of the present invention, the application scenarios disclosed in the embodiments of the present invention are described below. Referring to FIG. 1, FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention. In the application scenario shown in FIG. 1, a base station and at least one terminal are included, wherein the base station can be in communication connection with multiple terminals. Terminals can include mobile phones, tablets, PDAs, personal digital assistants (PDAs), mobile Internet devices (MIDs), smart wearable devices (such as smart watches, smart bracelets, etc.) The terminal is not limited in this embodiment of the present invention. In the application scenario shown in Figure 1, to meet the peak rate and network capacity of the user. The requirements of the upgrade can be introduced by Carrier Aggregation (CA) technology, which aggregates multiple consecutive or discontinuous carriers to increase the transmission bandwidth of the system and effectively improve the uplink and downlink transmission rates. However, due to the limited licensed spectrum resources, it is increasingly unable to meet the growing user base, so spectrum resources can be extended by using unlicensed spectrum. In order to achieve the use of unlicensed spectrum with the aid of licensed spectrum, 3GPP has proposed an authorized assisted access LAA technology. In the LAA system, since the unlicensed spectrum is introduced, it is necessary to consider the coexistence of the licensed spectrum and the unlicensed spectrum. Therefore, it is necessary to comply with the use rule of the unlicensed spectrum to listen to the LBT mechanism first.

In the embodiment of the present invention, when the base station and the terminal perform data transmission, the base station needs to perform channel state monitoring before the data transmission, to determine the busy state of the channel, and if the channel state is idle, The channel can then be used for data transmission; if the channel state is non-idle (ie, occupied), the channel cannot be used. In the existing LTE system, the uplink HARQ retransmission process may be: when the base station receives the data sent by the terminal, the base station decodes the data, and if the decoding fails, the terminal is required to retransmit the data. At this time, the base station may receive the data. The retransmitted data is merged with the previously received data and decoded. Uplink HARQ retransmission can be divided into adaptive HARQ retransmission and non-adaptive HARQ retransmission. The adaptive HARQ retransmission process is not only required to indicate the correctness of data decoding through the PHICH channel, but also needs to pass the channel PDCCH (Physical Downlink Control Channel) in order to avoid splitting the uplink frequency domain resources or avoid collision with the randomly accessed resources. The physical downlink control channel transmits the retransmission control information, and re-allocates the HARQ retransmission resources to the terminal, including the modulation and coding mode, the adopted physical resource block, the transmission block size, and the retransmission period, so that the terminal is in the new resource. Perform a HARQ retransmission. The non-adaptive HARQ retransmission process is controlled by the PHICH channel. The PHICH channel only transmits whether the data is correctly received, that is, whether the information needs to be retransmitted, without transmitting other information, and the terminal performs HARQ retransmission resource usage and last transmission. The same resources. The flexibility of adaptive HARQ retransmission is high, but the complexity of the HARQ process is greatly increased, and the overhead of signaling is greater. Non-adaptive HARQ retransmission saves the signaling overhead of the system to a large extent. However, in the LAA system, the LBT mechanism is introduced, and the uplink or downlink transmission cannot be guaranteed. Therefore, the downlink feedback on the PHICH channel is cancelled, that is, the downlink control information (Downlink Control Information, DCI) cannot be sent on the PHICH. Only the PDCCH channel is reserved for DCI transmission.

Based on the above problem, for the uplink non-adaptive HARQ retransmission process, the embodiment of the present invention adds a new uplink DCI format to the PUSCH (Physical Uplink Shared Channel) for the uplink uplink DCI format. Channel) scheduling of retransmissions. Currently, there are multiple formats of DCI information in an LTE system, including at least format 0, format 1, format 1A, format 1B, format 2, format 2A, format 3, format 4, etc., where format 0 and format 4 are two uplinks. The DCI format is used to indicate the PUSCH, that is, the control information of the uplink transmission. The information of the DCI transmission of the format 0 may include: a format 0 and a format 1A distinguishing flag, a frequency hopping flag bit, a resource block allocation and a frequency hopping resource allocation, a modulation and coding scheme, a redundancy version, and a new data indication ( New Data Indicator (NDI), the transmission power control command of the scheduled PUSCH, the CSI (Channel State Information) request, the SRS (Sounding Reference Signal) request, the uplink index number, the downlink index number, etc. Information for indicating physical resources of PUSCH transmission, frequency hopping information, feedback information request, modulation and coding mode, redundancy version, and the like. The information of the DCI transmission of the format 4 may include: resource block allocation, a transmission power control command of the scheduled PUSCH, a cyclic shift of the reference signal, an uplink index number, a downlink index number, a modulation and coding scheme, and a redundancy version, The NDI information, the CSI request, the SRS request, and the like are used to indicate physical resources such as PUSCH transmission, feedback information request, modulation and coding mode, redundancy version, and the like. The fields of the new uplink DCI format that may be included in the embodiment of the present invention include: NDI information and a HARQ process number, where the NDI information is used to indicate uplink HARQ retransmission or new data transmission, and the HARQ process number is used to indicate retransmission corresponding transmission. Piece. Compared with the DCI of the existing format, the newly formatted DCI simplifies the control information in the DCI and reduces the signaling overhead of the system. By implementing the solution, DCI information of a new format can be transmitted through the PDCCH channel, so as to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. It can be understood that the solution proposed by the embodiment of the present invention can be applied to the LAA system, and can also be applied to other evolved systems that introduce the LBT mechanism to enable the PHICH channel to perform downlink feedback by granting the spectrum-assisted unlicensed spectrum. limited.

Based on the application scenario shown in FIG. 1 , an embodiment of the present invention discloses a method for indicating HARQ retransmission. Referring to FIG. 2, FIG. 2 is a schematic flowchart diagram of a method for indicating HARQ retransmission according to an embodiment of the present invention. As shown in FIG. 2, the method for indicating the HARQ retransmission may include the following steps:

201. The base station performs an uplink non-adaptive HARQ process in the spectrum-assisted unlicensed spectrum. The receiving terminal transmits a signal uplinked on the physical uplink shared channel PUSCH corresponding to the target transport block.

In the embodiment of the present invention, in the process of granting the spectrum-assisted unlicensed spectrum to the uplink non-adaptive HARQ, the base station may first send the downlink control information to the terminal to perform the uplink transmission (the uplink transmission is the first transmission). The downlink control information sent by the base station may be a DCI of an existing format, such as a DCI of format 0 or a DCI of format 4, for indicating a physical resource block corresponding to the PUSCH transmission, a modulation and coding mode, a redundancy version, an NDI information, and a transport block. And other information. After receiving the downlink control information, the terminal performs uplink transmission on the PUSCH channel according to the indication in the downlink control information, so that the base station can receive the uplink transmission signal of the terminal on the PUSCH channel, where the signal may be data or some specific information. The embodiment of the invention is not limited.

202. The base station decodes the uplink transmission signal of the terminal to obtain a decoding result.

In the embodiment of the present invention, after the base station receives the uplink transmission signal from the terminal, the base station may decode the signal to obtain a decoding result. The decoding result may be decoding failure or decoding success.

203. The base station generates downlink control information DCI of the target format according to the decoding result.

In the embodiment of the present invention, after the base station decodes the received signal, the DCI of the target format may be generated according to the decoding result, where the DCI of the target format may be used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. The DCI of the target format may include the NDI information and/or the HARQ process ID, where the NDI information may be used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission, that is, the transmission scheduled by the DCI of the target format is uplink non-self. Adapting to HARQ retransmission or new data transmission; the HARQ process number can be used to indicate a target transport block for uplink non-adaptive HARQ retransmission, that is, which transmission or which transport block is scheduled by the DCI indicating the target format, where the terminal It is transmitted on the target transport block. In addition, some optional fields, such as a modulation and coding mode, a physical resource block, and the like, may be added to the DCI of the target format, and the flexibility may be added on the basis of the lower signaling overhead, which is not limited in the embodiment of the present invention.

In the embodiment of the present invention, the uplink non-adaptive HARQ retransmission may include synchronous HARQ retransmission or asynchronous HARQ retransmission, where synchronous HARQ retransmission refers to transmission (retransmission) of a HARQ process occurs at a fixed moment, due to the terminal. The time of occurrence of the transmission is known in advance, so that no additional signaling overhead is required to indicate the HARQ process number. In this case, the DCI of the target format may only include the NDI letter. Information, but may not contain the HARQ process number. Asynchronous HARQ retransmission means that the transmission time of a HARQ process is not fixed, and the terminal does not know the occurrence time of the transmission in advance. Therefore, the HARQ process ID needs to be sent together with the control information. At this time, the DCI of the target format not only includes the NDI information. Also need to include the HARQ process number.

204. The base station sends the DCI of the target format to the terminal by using the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

In the embodiment of the present invention, after the base station generates the DCI of the target format, the DCI of the target format may be sent to the terminal through the PDCCH channel, and after receiving the DCI of the target format, the terminal may parse the DCI of the target format and analyze the DCI. The result determines if uplink non-adaptive HARQ retransmission is required on the target transport block.

As an optional implementation, when the uplink non-adaptive HARQ retransmission is synchronous HARQ retransmission, the DCI of the target format may include first NDI information, where the first NDI information may be used to indicate whether the terminal performs uplink non-transmission. Adaptive HARQ retransmission;

Step 204: The base station sends the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether to perform uplink non-adaptive HARQ retransmission on the target transport block. Can be:

The base station sends the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether the terminal performs uplink non-adaptive HARQ on the target transport block according to the parsed first NDI information. pass.

In this embodiment, the terminal parses the DCI of the target format to obtain the first NDI information, and the first NDI information can determine whether the terminal performs uplink non-adaptive HARQ retransmission or new data transmission. Specifically, the terminal may compare the NDI information in the DCI information received last time in the target transport block with the first NDI information to determine whether the terminal needs to perform uplink non-adaptive HARQ retransmission. For example, the value of NDI in the DCI information received on the target transport block last time is 0, and the value in the first NDI information is 1, that is, the NDI value is reversed relative to the previous transmission, indicating that the base station decodes successfully. The terminal does not need to perform uplink non-adaptive HARQ retransmission. When the HARQ process is used next time, the content of the previously stored content will be used, so that the HARQ can be reused. Process and send new data in the HARQ process. For another example, the value of the NDI in the DCI information received on the target transport block last time is 0, and the value in the first NDI information is also 0, that is, the NDI value is not inverted compared to the previous transmission, and the base station decoding may be indicated. Failure, the terminal needs to perform uplink non-adaptive HARQ retransmission.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is an asynchronous HARQ retransmission, the DCI of the target format may include a second new data indicating NDI information and a HARQ process ID, where the second NDI information may be For indicating whether the terminal performs uplink non-adaptive HARQ retransmission, and the HARQ process ID may be used to indicate a target transport block for performing uplink non-adaptive HARQ retransmission;

Step 204: The base station sends the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether to perform uplink non-adaptive HARQ retransmission on the target transport block. Can be:

The base station sends the DCI of the target format to the terminal by using the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format, to determine whether the terminal performs uplink non-adaptive HARQ retransmission according to the second NDI information, and determines according to the HARQ process ID. Target transport block for uplink non-adaptive HARQ retransmission.

In this embodiment, since the feedback or scheduling time of the uplink transmission during the asynchronous HARQ retransmission does not have a one-to-one correspondence with the HARQ process number, the scheduling of the uplink non-adaptive HARQ retransmission needs to be explicitly indicated. Which HARQ process is targeted, that is, which transmission or which transport block is scheduled by the DCI of the target format, where the HARQ process number has a one-to-one correspondence with the transport block.

In this embodiment, the terminal determines the DCI of the target format to obtain the second NDI information and the HARQ process ID, and may first determine the target transport block for performing the uplink non-adaptive HARQ retransmission according to the HARQ process ID, and then The NDI information in the DCI information received last time in the target transport block is compared with the second NDI information to determine whether the terminal needs to perform uplink non-adaptive HARQ retransmission. For example, when the NDI value in the DCI information received last time in the target transport block is different from the value in the second NDI information, the terminal does not need to perform uplink non-adaptive HARQ retransmission; when the target transport block receives the last time When the NDI value in the DCI information is the same as the value in the second NDI information, the terminal needs to perform uplink non-adaptive HARQ retransmission.

As an optional implementation manner, the method described in FIG. 2 may further include the following steps:

21) When the DCI of the target format indicates that the terminal needs to perform uplink non-adaptive HARQ retransmission, the base station receives the signal that the terminal re-uplinks on the PUSCH channel corresponding to the target transport block.

In this embodiment, when the terminal performs uplink non-adaptive HARQ retransmission on the PUSCH channel, the same resource is transmitted for the previous time to perform HARQ retransmission, for example, the same physical resource block and modulation and coding method are transmitted the previous time. Resources such as redundancy versions are used for uplink non-adaptive HARQ retransmission.

In addition, when the DCI of the target format indicates that the terminal does not perform uplink non-adaptive HARQ retransmission, the base station may receive new data that is uplinked by the terminal on the PUSCH channel corresponding to the target transport block.

For example, please refer to FIG. 3. FIG. 3 is a schematic diagram of a process of uplink non-adaptive HARQ transmission according to an embodiment of the present invention. As shown in FIG. 3, the user side (terminal) performs uplink data transmission on the uplink subframe, and after receiving the uplink data, the base station side detects and processes the uplink data (such as decoding), and generates a new format according to the detection result. The DCI (ie, the DCI of the target format), and the DCI of the new format is sent through the downlink subframe; after receiving the DCI of the new format, the terminal may parse the DCI of the new format, if the NDI is not flipped last time. Then, the terminal will perform uplink non-adaptive HARQ retransmission; if the NDI is reversed last time, the terminal does not perform uplink non-adaptive HARQ retransmission.

As an optional implementation manner, before performing step 204, the method described in FIG. 2 may further include the following steps:

22) The base station performs state detection on the PDCCH channel for transmitting the DCI of the target format by using the LBT mechanism, and triggers the base station to perform step 204 when detecting that the PDCCH channel is in an idle state.

In this embodiment, in order to better coexist the licensed spectrum with the unlicensed spectrum, an LBT mechanism is introduced in the LAA system, and when the PDCCH channel for transmitting the DCI of the target format is deployed on the unlicensed spectrum, Before the transmission of the DCI of the target format, the PDCCH channel is detected by using the LBT mechanism. When the PDCCH channel is detected to be idle (ie, not occupied), the base station may send the DCI of the target format on the PDCCH channel, otherwise Wait until it is idle to send.

In addition, when the PDCCH channel for transmitting the DCI of the target format is deployed on the licensed spectrum, the DCI of the target format can be directly transmitted on the PDCCH channel without performing state detection on the PDCCH channel by using the LBT mechanism.

In the method described in FIG. 2, after receiving the uplink uplink non-adaptive HARQ process in the spectrum-assisted unlicensed spectrum, the base station receives the signal uplinked on the physical uplink shared channel PUSCH corresponding to the target transport block, and then The signal is decoded to obtain a decoding result, and the downlink control information DCI of the target format is generated according to the decoding result, and the base station may send the DCI of the target format to the terminal by using the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format. To determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block. By implementing the method described in FIG. 2, in a system for granting spectrum-assisted unlicensed spectrum, the base station can generate a new format in the case that the PHICH channel does not perform downlink feedback during uplink HARQ transmission due to the introduction of the LBT mechanism. The DCI information is transmitted through the PDCCH channel to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. In addition, the uplink non-adaptive HARQ retransmission process is completed by using a new format of DCI information, so that the system performs uplink HARQ retransmission under a small signaling overhead, thereby ensuring the reliability of data transmission and reducing the reliability. Make the cost.

Based on the application scenario shown in FIG. 1, the embodiment of the present invention discloses another method for indicating HARQ retransmission. Referring to FIG. 4, FIG. 4 is a schematic flowchart diagram of another method for indicating HARQ retransmission according to an embodiment of the present invention. As shown in FIG. 4, the method for indicating the HARQ retransmission may include the following steps:

401. The terminal uplinks a signal to the base station on the physical uplink shared channel PUSCH corresponding to the target transport block, so that the base station decodes the uplink uplink transmission signal, and generates downlink control information DCI in the target format according to the decoding result.

In the embodiment of the present invention, before the terminal transmits the signal to the base station, the terminal may first receive the downlink control information sent by the base station to perform the uplink transmission, and the uplink transmission may be the first transmission. The downlink null information may be a DCI of an existing format, and is used to indicate information such as a physical resource block, a modulation and coding mode, a redundancy version, an NDI information, a transport block, and the like corresponding to the PUSCH transmission. After receiving the downlink control information, the terminal according to the indication in the downlink control information is in the PUSCH letter. The uplink transmission is performed on the channel. After receiving the signal uplinked by the terminal on the PUSCH channel, the base station may decode the signal to obtain a decoding result, and generate a DCI of the target format according to the decoding result.

In the embodiment of the present invention, the decoding result may be that the decoding fails or the decoding succeeds. The target format DCI is a new DCI that is different from the existing format and can be used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission, which contains fewer fields than the existing format DCI. Reduced signaling overhead. The DCI of the target format may include at least but not limited to NDI information and/or HARQ process number. The signal transmitted by the terminal in the uplink may be data or some specific information, which is not limited in the embodiment of the present invention.

In the embodiment of the present invention, when the PUSCH channel for the uplink transmission signal is deployed in the unlicensed spectrum, the terminal first uses the LBT mechanism to perform state detection on the PUSCH channel before the uplink transmission signal, and only when the PUSCH channel is idle. Transmission; when the PUSCH channel for the uplink transmission signal is deployed in the licensed spectrum, the terminal can perform uplink transmission on the PUSCH channel without performing LBT channel detection.

402. The terminal receives the DCI of the target format sent by the base station by using a physical downlink control channel PDCCH.

403. The terminal parses the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is a synchronous HARQ retransmission, the DCI of the target format includes a first new data indicating NDI information, where the first NDI information is used to indicate whether the terminal performs uplink non-transmission. Adaptive HARQ retransmission;

The specific implementation manner of the step 403 that the terminal parses the DCI of the target format to determine whether to perform the uplink non-adaptive HARQ retransmission on the target transport block may include the following steps:

41) the terminal parses the DCI of the target format to obtain the first NDI information;

42) The terminal determines, according to the first NDI information, whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

As an optional implementation manner, the step 42) determining, according to the first NDI information, whether the uplink non-adaptive HARQ retransmission is performed on the target transport block may include the following steps:

42) The terminal acquires the NDI information included in the DCI of the first historical target format, where the DCI of the first historical target format is the DCI received by the terminal closest to the current time on the target transport block;

42b) The terminal determines whether the first NDI information is consistent with the NDI information included in the DCI of the first historical target format;

42c) when the first NDI information is consistent with the NDI information included in the DCI of the first historical target format, the terminal determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block;

42d) When the first NDI information is inconsistent with the NDI information contained in the DCI of the first historical target format, the terminal determines that uplink non-adaptive HARQ retransmission is not performed on the target transport block.

In this implementation manner, after the terminal parses the first NDI information, the NDI information included in the DCI received in the previous transmission block may be acquired, and the two NDI information are compared to determine whether the two are Consistently, when they are consistent (the values of the two are not inverted), the terminal needs to perform uplink non-adaptive HARQ retransmission; when it is inconsistent (the values of the two are reversed), the terminal does not need to perform uplink non-self Adapt to HARQ retransmissions.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes a second new data indicating NDI information and a HARQ process ID, where the second NDI information is used. Instructing the terminal to perform uplink non-adaptive HARQ retransmission, where the HARQ process number is used to indicate a target transport block for performing uplink non-adaptive HARQ retransmission;

The specific implementation manner of the step 403 that the terminal parses the DCI of the target format to determine whether to perform the uplink non-adaptive HARQ retransmission on the target transport block may include the following steps:

43) The terminal parses the DCI of the target format to obtain second NDI information and a HARQ process number;

44) The terminal determines whether to perform uplink non-adaptive HARQ retransmission according to the second NDI information, and determines a target transport block for performing uplink non-adaptive HARQ retransmission according to the HARQ process ID.

As an optional implementation manner, step 44) the terminal determines, according to the second NDI information, whether to perform uplink non-adaptive HARQ retransmission, and determines, according to the HARQ process ID, a specific implementation of the target transport block for performing uplink non-adaptive HARQ retransmission. The method can include the following steps:

44a) the terminal determines, according to the HARQ process ID, a target transport block for performing uplink non-adaptive HARQ retransmission;

44b) the terminal acquires the NDI information contained in the DCI of the second historical target format, the second history The DCI of the target format is the DCI received by the terminal closest to the current time on the target transport block;

44c) determining, by the terminal, whether the second NDI information is consistent with the NDI information included in the DCI of the second historical target format;

44d) when the second NDI information is consistent with the NDI information included in the DCI of the second historical target format, the terminal determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block;

44e) When the second NDI information is inconsistent with the NDI information contained in the DCI of the second historical target format, the terminal determines that uplink non-adaptive HARQ retransmission is not performed on the target transport block.

In this implementation manner, after the terminal parses the second NDI information and the HARQ process ID, the target transmission block for performing the uplink non-adaptive HARQ retransmission may be determined by using the HARQ process ID, and then acquiring the previous transport block on the target transport block. The NDI information contained in the received DCI is compared, and the two NDI information are compared to determine whether the two are consistent. When the two are consistent (the values of the two are not reversed), the terminal needs to perform uplink non-adaptive HARQ. Retransmission; when inconsistent (the values of both have flipped), the terminal does not need to perform uplink non-adaptive HARQ retransmission.

As an optional implementation manner, the method described in FIG. 4 may further include the following steps:

45) When the terminal determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, the terminal re-uplinks the signal to the base station on the PUSCH channel corresponding to the target transport block.

In this embodiment, when the terminal determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, the terminal will perform the HARQ retransmission using the same resource as the previous transmission, for example, using the same physical resource for the previous transmission. Resources such as blocks, modulation and coding schemes, and redundancy versions are used for uplink non-adaptive HARQ retransmission.

In this embodiment, when the PUSCH channel for retransmission is deployed in the unlicensed spectrum, the terminal first performs state detection on the PUSCH channel by using the LBT mechanism before performing uplink non-adaptive HARQ retransmission, where the PUSCH channel is used. Retransmission is performed when idle; when the PUSCH channel is deployed in the licensed spectrum, the terminal can perform retransmission on the PUSCH channel without performing LBT channel detection.

In addition, when the terminal determines that uplink non-adaptive HARQ retransmission is not required on the target transport block, the terminal may uplink transmit new data to the base station on the PUSCH channel corresponding to the target transport block.

Specifically, the process of performing uplink adaptive HARQ transmission between the base station and the terminal can be seen in FIG. 3 Show.

In the embodiment of the present invention, by implementing the method described in FIG. 4, in a system for granting spectrum-assisted unlicensed spectrum, the terminal may perform the downlink feedback in the uplink HARQ transmission process due to the introduction of the LBT mechanism. Receiving a new format of DCI information transmitted by the base station through the PDCCH channel, so as to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. In addition, the uplink non-adaptive HARQ retransmission process is completed by using a new format of DCI information, so that the system performs uplink HARQ retransmission under a small signaling overhead, thereby ensuring the reliability of data transmission and reducing the reliability. Make the cost.

Based on the application scenario shown in FIG. 1 , an embodiment of the present invention discloses a base station. Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention, which is used to perform a method for indicating HARQ retransmission provided by an embodiment of the present invention. As shown in FIG. 5, the base station may include:

The receiving unit 501 is configured to receive, by the receiving terminal, a signal that is uplinked on the physical uplink shared channel PUSCH corresponding to the target transport block in the process of performing the uplink non-adaptive HARQ in the licensed spectrum-assisted unlicensed spectrum.

In the embodiment of the present invention, when performing the uplink non-adaptive HARQ retransmission by granting the spectrum-assisted unlicensed spectrum, the base station may first send the downlink control information to the terminal to perform the uplink transmission (the uplink transmission is the first transmission). The downlink control information sent by the base station may be the DCI of the existing format, such as the DCI of the format 0 or the DCI of the format 4, for indicating the physical resource block corresponding to the PUSCH transmission, the modulation and coding mode, the redundancy version, the NDI information, and the transmission. Block and other information. After receiving the downlink control information, the terminal performs uplink transmission on the PUSCH channel according to the indication in the downlink control information, so that the receiving unit 501 can receive the uplink transmission signal of the terminal on the PUSCH channel, where the signal may be data or some The specific information is not limited in the embodiment of the present invention.

The decoding unit 502 is configured to decode a signal that is uplinked by the terminal to obtain a decoding result.

The generating unit 503 is configured to generate downlink control information DCI of the target format according to the decoding result.

The DCI of the target format may be used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission.

The sending unit 504 is configured to send the target cell to the terminal by using a physical downlink control channel PDCCH The DCI is such that the terminal parses the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

As an optional implementation, when the uplink non-adaptive HARQ retransmission is synchronous HARQ retransmission, the DCI of the target format may include first NDI information, where the first NDI information may be used to indicate whether the terminal performs uplink non-transmission. Adaptive HARQ retransmission;

Correspondingly, the sending unit 504 is specifically configured to send, by using the physical downlink control channel PDCCH, the DCI of the target format to the terminal, so that the terminal parses the DCI of the target format, to determine, according to the parsed first NDI information, that the terminal is in the target transport block. Whether uplink non-adaptive HARQ retransmission is performed.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is an asynchronous HARQ retransmission, the DCI of the target format may include a second new data indicating NDI information and a HARQ process ID, where the second NDI information may be For indicating whether the terminal performs uplink non-adaptive HARQ retransmission, and the HARQ process ID may be used to indicate a target transport block for performing uplink non-adaptive HARQ retransmission;

Correspondingly, the sending unit 504 is specifically configured to send, by using the physical downlink control channel PDCCH, the DCI of the target format to the terminal, so that the terminal parses the DCI of the target format, to determine whether the terminal performs uplink non-adaptive HARQ according to the second NDI information. Retransmission and determination of the target transport block for uplink non-adaptive HARQ retransmission according to the HARQ process number.

As an optional implementation, the receiving unit 501 is further configured to: when the DCI of the target format indicates that the terminal needs to perform uplink non-adaptive HARQ retransmission, the receiving terminal re-uplinks on the PUSCH channel corresponding to the target transport block. The signal.

As an optional implementation manner, when the PDCCH channel for transmitting the DCI of the target format is deployed on the unlicensed spectrum, LBT detection is required for the PDCCH channel. Referring to FIG. 6 , FIG. 6 is a schematic structural diagram of another base station according to an embodiment of the present invention, which is used to perform the method for indicating HARQ retransmission provided by the embodiment of the present invention. The base station shown in FIG. 6 is further optimized based on the base station shown in FIG. 5. Compared with the base station shown in FIG. 5, the base station shown in FIG. 6 may further include:

The detecting unit 505 is configured to perform state detection on the PDCCH channel for transmitting the DCI of the target format by using the LBT mechanism before the transmitting unit 504 sends the DCI of the target format to the terminal through the physical downlink control channel PDCCH.

The specific implementation manner in which the sending unit 504 sends the target format DCI to the terminal through the physical downlink control channel PDCCH may be:

When the detecting unit 505 detects that the PDCCH channel is in an idle state, the transmitting unit 504 transmits the DCI of the target format to the terminal through the PDCCH channel.

In the embodiment of the present invention, by implementing the base station shown in FIG. 5 and FIG. 6, in the system for granting spectrum-assisted unlicensed spectrum, the PHICH channel does not perform downlink feedback in the uplink HARQ transmission process due to the introduction of the LBT mechanism. A new format of DCI information may be generated and transmitted through the PDCCH channel to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. In addition, the uplink non-adaptive HARQ retransmission process is completed by using a new format of DCI information, so that the system performs uplink HARQ retransmission under a small signaling overhead, thereby ensuring the reliability of data transmission and reducing the reliability. Make the cost.

Based on the application scenario shown in FIG. 1, the embodiment of the present invention discloses another base station. Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present invention, which is used to perform the method for indicating HARQ retransmission provided by the embodiment of the present invention. As shown in FIG. 7, the base station 700 can include at least one processor 701, such as a CPU (Central Processing Unit), at least one input device 702, at least one output device 703, a memory 704, and the like. Among them, these components can be communicatively connected through one or more buses 705. It can be understood by those skilled in the art that the structure of the base station 700 shown in FIG. 7 does not constitute a limitation on the embodiment of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may also include more than the illustration. Or fewer parts, or combine some parts, or different parts. among them:

In the embodiment of the present invention, the input device 702 may include a wired interface, a wireless interface, and the like, and may be used to receive signals transmitted by the terminal for uplink. The output device 703 may include a wired interface, a wireless interface, etc., and may be used to downlink signals to the terminal and the like.

In the embodiment of the present invention, the memory 704 may be a high speed RAM memory or a non-volatile memory, such as at least one disk memory. The memory 704 can optionally also be at least one storage device located remotely from the aforementioned processor 701. As shown in FIG. 7, the application 704 and the like may be included in the memory 704, which is not limited by the embodiment of the present invention.

In the base station 700 shown in FIG. 7, the processor 701 can be used to call an application stored in the memory 704 to perform the following operations:

The triggering input device 702 receives a signal that is uplinked by the terminal on the physical uplink shared channel PUSCH corresponding to the target transport block in the uplink non-adaptive HARQ process.

Decoding the signal transmitted by the terminal uplink to obtain a decoding result;

And generating, according to the decoding result, downlink control information DCI of the target format, where the DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission;

The trigger output device 703 transmits the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is a synchronous HARQ retransmission, the DCI of the target format includes a first new data indicating NDI information, where the first NDI information is used to indicate whether the terminal performs uplink non-transmission. Adaptive HARQ retransmission;

The processor 701 triggers the output device 703 to send the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block. The specific implementation can be:

The trigger output device 703 sends the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether the terminal performs uplink non-adaptive HARQ on the target transport block according to the first NDI information. pass.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes a second new data indicating NDI information and a HARQ process ID, where the second NDI information is used. Instructing the terminal to perform uplink non-adaptive HARQ retransmission, where the HARQ process number is used to indicate a target transport block for performing uplink non-adaptive HARQ retransmission;

The processor 701 triggers the output device 703 to send the DCI of the target format to the terminal through the physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block. The specific implementation can be:

The trigger output device 703 sends the target format to the terminal through the physical downlink control channel PDCCH. The DCI is such that the terminal parses the DCI of the target format to determine whether the terminal performs uplink non-adaptive HARQ retransmission according to the second NDI information and determines a target transport block for performing uplink non-adaptive HARQ retransmission according to the HARQ process number.

As an optional implementation manner, the processor 701 can also call an application stored in the memory 704 and perform the following operations:

When the DCI of the target format indicates that the terminal needs to perform uplink non-adaptive HARQ retransmission, the trigger input device 702 receives the signal that the terminal re-uplinks on the PUSCH channel corresponding to the target transport block.

As an optional implementation manner, the processor 701 may also call the application stored in the memory 704 before the trigger output device 703 sends the DCI of the target format to the terminal through the physical downlink control channel PDCCH, and perform the following operations:

Performing state detection on the PDCCH channel of the DCI used to transmit the target format by using the LBT mechanism first;

The specific implementation manner of the processor 701 triggering the output device 703 to send the target format DCI to the terminal through the physical downlink control channel PDCCH is:

When detecting that the PDCCH channel for transmitting the DCI of the target format is in an idle state, the trigger output device 703 transmits the DCI of the target format to the terminal through the PDCCH channel.

In the embodiment of the present invention, by implementing the base station shown in FIG. 7 , in a system for granting spectrum-assisted unlicensed spectrum, the PHICH channel may be generated without downlink feedback during uplink HARQ transmission due to the introduction of the LBT mechanism. A new format of DCI information is transmitted through the PDCCH channel to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. In addition, the uplink non-adaptive HARQ retransmission process is completed by using a new format of DCI information, so that the system performs uplink HARQ retransmission under a small signaling overhead, thereby ensuring the reliability of data transmission and reducing the reliability. Make the cost.

Based on the application scenario shown in FIG. 1 , an embodiment of the present invention discloses a terminal. Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention, which is used to perform a method for indicating HARQ retransmission provided by an embodiment of the present invention. As shown in FIG. 8, the terminal may include:

The sending unit 801 is configured to: uplink transmit a signal to the base station on the physical uplink shared channel PUSCH corresponding to the target transport block, so that the base station decodes the signal, and generate downlink control information DCI of the target format according to the decoding result.

The DCI of the target format may be used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission.

The receiving unit 802 is configured to receive the DCI of the target format sent by the base station by using the physical downlink control channel PDCCH.

In the embodiment of the present invention, after the transmitting unit 801 uplinks the signal to the base station, it may send a triggering instruction to the receiving unit 802 to trigger the receiving unit 802 to receive the DCI of the target format sent by the base station.

The parsing unit 803 is configured to parse the DCI of the target format to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is a synchronous HARQ retransmission, the DCI of the target format includes a first new data indicating NDI information, where the first NDI information is used to indicate whether the terminal performs uplink non-transmission. Adaptive HARQ retransmission;

The parsing unit 803 may be specifically configured to parse the DCI of the target format to obtain first NDI information, and determine whether to perform uplink non-adaptive HARQ retransmission on the target transport block according to the first NDI information.

FIG. 9 is a schematic structural diagram of another terminal according to an embodiment of the present invention, which is used to perform the method for indicating HARQ retransmission provided by the embodiment of the present invention. The terminal shown in FIG. 9 is further optimized based on the terminal shown in FIG. 8. Compared with the terminal shown in FIG. 8, the inter-terminal parsing unit 803 shown in FIG. 9 may include:

a first parsing sub-unit 8031, configured to parse the DCI of the target format to obtain first NDI information;

The first obtaining sub-unit 8032 is configured to obtain NDI information included in the DCI of the first historical target format, where the DCI of the first historical target format is the DCI received by the terminal closest to the current time on the target transport block;

The first determining sub-unit 8033 is configured to determine the first NDI parsed by the first parsing sub-unit 8031. Whether the information is consistent with the NDI information included in the DCI of the first historical target format acquired by the first obtaining sub-unit 8032;

The first determining sub-unit 8034 is configured to: when the first determining sub-unit 8033 determines that the first NDI information is consistent with the NDI information included in the DCI of the first historical target format, determine that the uplink non-self is required on the target transport block. Adapt to HARQ retransmission;

The second determining sub-unit 8035 is configured to: when the first determining sub-unit 8033 determines that the first NDI information is inconsistent with the NDI information included in the DCI of the first historical target format, determine that the uplink non-self is not performed on the target transport block. Adapt to HARQ retransmissions.

As an optional implementation manner, the sending unit 801 is further configured to: when the first determining sub-unit 8034 determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, on the PUSCH corresponding to the target transport block. The base station retransmits the signal in the uplink.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes a second new data indicating NDI information and a HARQ process ID, where the second NDI information is used. Instructing the terminal to perform uplink non-adaptive HARQ retransmission, where the HARQ process number is used to indicate a target transport block for performing uplink non-adaptive HARQ retransmission;

The parsing unit 803 is specifically configured to parse the DCI of the target format to obtain the second NDI information and the HARQ process ID, and determine whether to perform uplink non-adaptive HARQ retransmission according to the second NDI information, and determine according to the HARQ process ID. A target transport block for uplink non-adaptive HARQ retransmission.

FIG. 10 is a schematic structural diagram of another terminal according to an embodiment of the present invention, which is used to perform the method for indicating HARQ retransmission provided by the embodiment of the present invention. The terminal shown in FIG. 10 is further optimized based on the terminal shown in FIG. 8. Compared with the terminal shown in FIG. 8, the inter-terminal parsing unit 803 shown in FIG. 10 may include:

a second parsing sub-unit 8036, configured to parse the DCI of the target format to obtain second NDI information and a HARQ process ID;

a third determining subunit 8037, configured to determine, according to the HARQ process ID, a target transport block that performs uplink non-adaptive HARQ retransmission;

a second obtaining subunit 8038, configured to acquire an NDI included in a DCI of a second historical target format Information, the DCI of the second historical target format is the DCI received by the terminal closest to the current time on the target transport block;

The second determining sub-unit 8039 is configured to determine whether the second NDI information parsed by the second parsing sub-unit 8036 is consistent with the NDI information included in the DCI of the second historical target format acquired by the second obtaining sub-unit 8038;

a fourth determining sub-unit 8040, configured to: when the second determining sub-unit 8039 determines that the second NDI information is consistent with the NDI information included in the DCI of the second historical target format, determining that the uplink non-self is required on the target transport block Adapt to HARQ retransmission;

The fifth determining subunit 8041 is configured to: when the second determining subunit 8039 determines that the second NDI information is inconsistent with the NDI information included in the DCI of the second historical target format, determine that the uplink non-self is not performed on the target transport block. Adapt to HARQ retransmissions.

As an optional implementation manner, the sending unit 801 is further configured to: when the fourth determining subunit 8040 determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, on the PUSCH channel corresponding to the target transport block. The signal is retransmitted upstream to the base station.

In the embodiment of the present invention, by implementing the terminal shown in FIG. 8 to FIG. 10, in the system for granting the spectrum-assisted unlicensed spectrum, the PHICH channel does not perform downlink feedback in the uplink HARQ transmission process due to the introduction of the LBT mechanism. The DCI information of the new format transmitted by the base station through the PDCCH channel may be received to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. In addition, the uplink non-adaptive HARQ retransmission process is completed by using a new format of DCI information, so that the system performs uplink HARQ retransmission under a small signaling overhead, thereby ensuring the reliability of data transmission and reducing the reliability. Make the cost.

Based on the application scenario shown in FIG. 1, the embodiment of the present invention discloses another terminal. Referring to FIG. 11, FIG. 11 is a schematic structural diagram of another terminal according to an embodiment of the present invention, for performing the method for indicating HARQ retransmission provided by the embodiment of the present invention. As shown in FIG. 11, the terminal 1100 may include at least one processor 1101, such as a CPU, at least one input device 1102, at least one output device 1103, a memory 1104, and the like. Among them, these components can be communicatively connected through one or more buses 1105. Those skilled in the art can understand the structure of the terminal 1100 shown in FIG. It does not constitute a limitation on the embodiment of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may include more or less components than those illustrated, or some components may be combined, or different component arrangements. among them:

In the embodiment of the present invention, the input device 1102 may include a wired interface, a wireless interface, and the like, and may be used to receive signals sent by the base station in downlink. The output device 1103 may include a wired interface, a wireless interface, etc., and may be used to uplink signals to the base station and the like.

In the embodiment of the present invention, the memory 1104 may be a high speed RAM memory or a non-volatile memory, such as at least one disk memory. The memory 1104 can also optionally be at least one storage device located remotely from the aforementioned processor 1101. As shown in FIG. 11 , the operating system, the application program, the data, and the like may be included in the memory 1104 as a computer storage medium, which is not limited in the embodiment of the present invention.

In the terminal 1100 shown in FIG. 11, the processor 1101 can be used to call an application stored in the memory 1104 to perform the following operations:

The trigger output device 1103 uplinks a signal to the base station on the physical uplink shared channel PUSCH corresponding to the target transport block, so that the base station decodes the uplink transmission signal of the terminal 1100, and generates downlink control information DCI of the target format according to the decoding result. The formatted DCI is used to indicate whether the terminal 1100 needs to perform uplink non-adaptive HARQ retransmission;

The trigger input device 1102 receives the DCI of the target format sent by the base station through the physical downlink control channel PDCCH;

The DCI of the target format is parsed to determine whether uplink non-adaptive HARQ retransmission is performed on the target transport block.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is a synchronous HARQ retransmission, the DCI of the target format includes a first new data indicating NDI information, where the first NDI information is used to indicate whether the terminal 1100 performs uplink. Non-adaptive HARQ retransmission;

The specific implementation manner in which the processor 1101 parses the DCI of the target format to determine whether to perform uplink non-adaptive HARQ retransmission on the target transport block may be:

Parsing the DCI of the target format to obtain first NDI information;

Determining whether to perform uplink non-adaptive HARQ on the target transport block according to the first NDI information Retransmission.

As an optional implementation manner, the processor 1101 determines, according to the first NDI information, whether the uplink non-adaptive HARQ retransmission is performed on the target transport block.

Acquiring the NDI information included in the DCI of the first historical target format, where the DCI of the first historical target format is the DCI received by the terminal 1100 on the target transport block from the current time;

Determining whether the first NDI information is consistent with the NDI information included in the DCI of the first historical target format;

When the first NDI information is consistent with the NDI information included in the DCI of the first historical target format, determining that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block;

When the first NDI information is inconsistent with the NDI information included in the DCI of the first historical target format, it is determined that uplink non-adaptive HARQ retransmission is not performed on the target transport block.

As an optional implementation manner, when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes a second new data indicating NDI information and a HARQ process ID, where the second NDI information is used. Instructing the terminal 1100 whether to perform uplink non-adaptive HARQ retransmission, where the HARQ process number is used to indicate a target transport block for performing uplink non-adaptive HARQ retransmission;

The specific implementation manner in which the processor 1101 parses the DCI of the target format to determine whether to perform uplink non-adaptive HARQ retransmission on the target transport block may be:

Parsing the DCI of the target format to obtain second NDI information and a HARQ process number;

Determining whether to perform uplink non-adaptive HARQ retransmission according to the second NDI information, and determining a target transport block for performing uplink non-adaptive HARQ retransmission according to the HARQ process ID.

As an optional implementation manner, the processor 1101 determines whether to perform uplink non-adaptive HARQ retransmission according to the second NDI information, and determines a specific implementation manner of the target transport block for performing uplink non-adaptive HARQ retransmission according to the HARQ process ID. Can be:

Determining, according to the HARQ process ID, a target transport block for performing uplink non-adaptive HARQ retransmission;

Acquiring the NDI information included in the DCI of the second historical target format, where the DCI of the second historical target format is the DCI received by the terminal 1100 on the target transport block from the current time;

Determining whether the second NDI information is consistent with the NDI information included in the DCI of the second historical target format;

When the second NDI information is consistent with the NDI information included in the DCI of the second historical target format, determining that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block;

When the second NDI information is inconsistent with the NDI information included in the DCI of the second historical target format, it is determined that uplink non-adaptive HARQ retransmission is not performed on the target transport block.

As an optional implementation manner, the processor 1101 may also call an application stored in the memory 1104 and perform the following operations:

When the terminal 1100 determines that uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, the trigger output device 1103 re-uplinks the signal to the base station on the PUSCH channel corresponding to the target transport block.

In the embodiment of the present invention, by implementing the terminal shown in FIG. 11, in the system for granting spectrum-assisted unlicensed spectrum, the PHICH channel can be received without downlink feedback in the uplink HARQ transmission process due to the introduction of the LBT mechanism. The DCI information of the new format transmitted by the base station through the PDCCH channel is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission. In addition, the uplink non-adaptive HARQ retransmission process is completed by using a new format of DCI information, so that the system performs uplink HARQ retransmission under a small signaling overhead, thereby ensuring the reliability of data transmission and reducing the reliability. Make the cost.

Modules or sub-modules in all embodiments of the present invention may be implemented by a general-purpose integrated circuit, such as a CPU, or by an ASIC (Application Specific Integrated Circuit).

It should be noted that, for the foregoing various method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because some steps may be performed in other orders or concurrently in accordance with the present application. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not described in detail in a certain embodiment can be referred to the related descriptions of other embodiments.

The steps in the method of the embodiment of the present invention may be sequentially adjusted, merged, and deleted according to actual needs.

In the embodiment of the present invention, the unit or the subunit in the base station and the terminal may be merged according to actual needs. Division and deletion.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The method for indicating the HARQ retransmission and the related device provided by the embodiment of the present invention are described in detail. The principle and the implementation manner of the present invention are described in the following. The description of the above embodiment is only for helping. The method of the present invention and its core idea are understood; at the same time, for those skilled in the art, according to the idea of the present invention, there are changes in the specific embodiments and application scopes. It should be understood that the invention is limited.

Claims (22)

A method for indicating a hybrid automatic repeat request (HARQ) retransmission, comprising: And transmitting, by the base station, a signal that is uplinked by the terminal on the physical uplink shared channel PUSCH corresponding to the target transport block in the uplink non-adaptive HARQ process of the licensed spectrum-assisted unlicensed spectrum; The base station decodes the signal uplinked by the terminal to obtain a decoding result; The base station generates, according to the decoding result, downlink control information DCI in a target format, where the DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission; Transmitting, by the base station, the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether the uplink non-self is performed on the target transport block. Adapt to HARQ retransmissions. The method according to claim 1, wherein when the uplink non-adaptive HARQ retransmission is synchronous HARQ retransmission, the DCI of the target format includes first new data indicating NDI information, the first NDI The information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission; The base station sends the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format to determine whether the uplink is performed on the target transport block. Non-adaptive HARQ retransmissions, including: Transmitting, by the base station, the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format, to determine, according to the first NDI information, that the terminal is in the target. Whether the uplink non-adaptive HARQ retransmission is performed on the transport block. The method according to claim 1, wherein when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes second new data indicating NDI information and a HARQ process number, wherein The second NDI information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission, and the HARQ process ID is used to indicate the target transport block that performs the uplink non-adaptive HARQ retransmission; The base station sends the target to the terminal by using a physical downlink control channel PDCCH. Formatting the DCI, so that the terminal parses the DCI of the target format to determine whether the uplink non-adaptive HARQ retransmission is performed on the target transport block, including: Transmitting, by the base station, the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, so that the terminal parses the DCI of the target format, to determine, according to the second NDI information, whether the terminal performs the Uplink non-adaptive HARQ retransmission and determining the target transport block for performing the uplink non-adaptive HARQ retransmission according to the HARQ process number. The method according to any one of claims 1 to 3, wherein the method further comprises: When the DCI of the target format indicates that the terminal needs to perform the uplink non-adaptive HARQ retransmission, the base station receives the signal that the terminal re-uplinks on the PUSCH corresponding to the target transport block. . The method according to any one of claims 1-4, wherein before the base station sends the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, the method further includes: The base station performs state detection on the PDCCH for transmitting the DCI of the target format by using an LBT mechanism: The base station sends the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, including: When detecting that the PDCCH is in an idle state, the base station sends the DCI of the target format to the terminal by using the PDCCH. A method for indicating a hybrid automatic repeat request (HARQ) retransmission, comprising: The terminal uplinks a signal to the base station on the physical uplink shared channel (PUSCH) corresponding to the target transport block, so that the base station decodes the signal that is uplinked by the terminal, and generates downlink control information DCI in the target format according to the decoding result. The DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission; Receiving, by the terminal, the DCI of the target format sent by the base station by using a physical downlink control channel PDCCH; The terminal parses the DCI of the target format to determine whether the uplink non-adaptive HARQ retransmission is performed on the target transport block. The method according to claim 6, wherein when the uplink non-adaptive HARQ retransmission is synchronous HARQ retransmission, the DCI of the target format includes first new data indicating NDI information, the first NDI The information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission; The terminal parses the DCI of the target format to determine whether to perform the uplink non-adaptive HARQ retransmission on the target transport block, including: The terminal parses the DCI of the target format to obtain the first NDI information; Determining, according to the first NDI information, whether the uplink non-adaptive HARQ retransmission is performed on the target transport block. The method according to claim 7, wherein the terminal determines whether to perform the uplink non-adaptive HARQ retransmission on the target transport block according to the first NDI information, including: The terminal acquires the NDI information included in the DCI of the first historical target format, where the DCI of the first historical target format is the DCI received by the terminal closest to the current time on the target transport block; Determining, by the terminal, whether the first NDI information is consistent with the NDI information included in the DCI of the first historical target format; When the first NDI information is consistent with the NDI information included in the DCI of the first historical target format, the terminal determines that the uplink non-adaptive HARQ retransmission needs to be performed on the target transport block; When the first NDI information is inconsistent with the NDI information included in the DCI of the first historical target format, the terminal determines that the uplink non-adaptive is not performed on the target transport block. HARQ retransmission. The method according to claim 6, wherein when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes second new data indicating NDI information and a HARQ process number, wherein The second NDI information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission, and the HARQ process ID is used to indicate the target transport block that performs the uplink non-adaptive HARQ retransmission; The terminal parses the DCI of the target format to determine whether to perform the uplink non-adaptive HARQ retransmission on the target transport block, including: The terminal parses the DCI of the target format to obtain the second NDI information and the HARQ process ID; Determining, by the terminal, whether to perform the uplink non-adaptive HARQ retransmission according to the second NDI information, and determining, according to the HARQ process ID, the target transport block that performs the uplink non-adaptive HARQ retransmission. The method according to claim 9, wherein the terminal determines whether to perform the uplink non-adaptive HARQ retransmission according to the second NDI information, and performs the uplink non-self according to the HARQ process number determination. The target transport block adapted to the HARQ retransmission includes: Determining, by the terminal, the target transport block that performs the uplink non-adaptive HARQ retransmission according to the HARQ process ID; The terminal acquires the NDI information included in the DCI of the second historical target format, where the DCI of the second historical target format is the DCI received by the terminal closest to the current time on the target transport block; Determining, by the terminal, whether the second NDI information is consistent with the NDI information included in the DCI of the second historical target format; When the second NDI information is consistent with the NDI information included in the DCI of the second historical target format, the terminal determines that the uplink non-adaptive HARQ retransmission needs to be performed on the target transport block; When the second NDI information is inconsistent with the NDI information included in the DCI of the second historical target format, the terminal determines that the uplink non-adaptive HARQ retransmission is not performed on the target transport block. The method according to any one of claims 6 to 10, wherein the method further comprises: When the terminal determines that the uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, the terminal re-uplinks the signal to the base station on the PUSCH corresponding to the target transport block. . A base station, comprising: a receiving unit, configured to receive, by the receiving terminal, a signal that is uplinked on the physical uplink shared channel PUSCH corresponding to the target transport block in the uplink non-adaptive HARQ process in the licensed spectrum-assisted unlicensed spectrum; a decoding unit, configured to decode the signal uplinked by the terminal to obtain a decoding result; a generating unit, configured to generate, according to the decoding result, downlink control information DCI in a target format, where the DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission; a sending unit, configured to send, by using a physical downlink control channel PDCCH, the DCI of the target format to the terminal, so that the terminal parses the DCI of the target format to determine whether the uplink is performed on the target transport block. Non-adaptive HARQ retransmission. The base station according to claim 12, wherein when the uplink non-adaptive HARQ retransmission is synchronous HARQ retransmission, the DCI of the target format includes first new data indicating NDI information, the first NDI The information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission; The sending unit is specifically configured to send, by using a physical downlink control channel PDCCH, the terminal Determining the DCI of the target format, so that the terminal parses the DCI of the target format to determine whether the terminal performs the uplink non-adaptive HARQ retransmission on the target transport block according to the first NDI information. The base station according to claim 12, wherein when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes second new data indicating NDI information and a HARQ process number, where The second NDI information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission, and the HARQ process ID is used to indicate the target transport block that performs the uplink non-adaptive HARQ retransmission; The sending unit is specifically configured to send, by using a physical downlink control channel PDCCH, the DCI of the target format to the terminal, so that the terminal parses the DCI of the target format, to determine the terminal according to the second NDI information. Whether to perform the uplink non-adaptive HARQ retransmission and determine the target transport block for performing the uplink non-adaptive HARQ retransmission according to the HARQ process ID. A base station according to any of claims 12-14, characterized in that The receiving unit is further configured to: when the DCI of the target format indicates that the terminal needs to perform the uplink non-adaptive HARQ retransmission, receive the terminal to re-uplink on the PUSCH corresponding to the target transport block. The signal transmitted. The base station according to any one of claims 12-15, wherein the base station further comprises: a detecting unit, configured to: after the sending unit sends the DCI of the target format to the terminal by using a physical downlink control channel PDCCH, using the LBT mechanism to listen to the PDCCH for transmitting the target format DCI Perform status detection; The manner in which the sending unit sends the DCI of the target format to the terminal by using the physical downlink control channel PDCCH is specifically: And when the detecting unit detects that the PDCCH is in an idle state, the sending unit sends the DCI of the target format to the terminal by using the PDCCH. A terminal, comprising: a sending unit, configured to: perform uplink transmission of a signal to the base station on the physical uplink shared channel (PUSCH) corresponding to the target transport block, so that the base station decodes the signal, and generate downlink control information (DCI) of the target format according to the decoding result, where The DCI of the target format is used to indicate whether the terminal needs to perform uplink non-adaptive HARQ retransmission; a receiving unit, configured to receive a DCI of the target format sent by the base station by using a physical downlink control channel PDCCH; And a parsing unit, configured to parse the DCI of the target format to determine whether the uplink non-adaptive HARQ retransmission is performed on the target transport block. The terminal according to claim 17, wherein when the uplink non-adaptive HARQ retransmission is synchronous HARQ retransmission, the DCI of the target format includes first new data indicating NDI information, the first NDI The information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission; The parsing unit is configured to parse the DCI of the target format to obtain the first NDI information, and determine, according to the first NDI information, whether the uplink non-adaptive HARQ is performed on the target transport block. pass. The terminal according to claim 18, wherein the parsing unit comprises: a first parsing subunit, configured to parse the DCI of the target format to obtain the first NDI information; a first acquiring subunit, configured to acquire NDI information included in a DCI of a first historical target format, where the DCI of the first historical target format is received by the terminal on the target transport block recently from a current time DCI; a first determining subunit, configured to determine whether the first NDI information is consistent with the NDI information included in the DCI of the first historical target format; a first determining subunit, configured to: when the first determining subunit determines the first NDI information Determining that the uplink non-adaptive HARQ retransmission needs to be performed on the target transport block when the NDI information included in the DCI of the first historical target format is consistent; a second determining subunit, configured to: when the first determining subunit determines that the first NDI information is inconsistent with the NDI information included in the DCI of the first historical target format, determine the target transport block The uplink non-adaptive HARQ retransmission is not performed on the uplink. The terminal according to claim 17, wherein when the uplink non-adaptive HARQ retransmission is asynchronous HARQ retransmission, the DCI of the target format includes second new data indicating NDI information and a HARQ process number, where The second NDI information is used to indicate whether the terminal performs the uplink non-adaptive HARQ retransmission, and the HARQ process ID is used to indicate the target transport block that performs the uplink non-adaptive HARQ retransmission; The parsing unit is specifically configured to parse the DCI of the target format to obtain the second NDI information and the HARQ process ID, and determine whether to perform the uplink non-adaptive HARQ retransmission according to the second NDI information. And determining, according to the HARQ process ID, the target transport block that performs the uplink non-adaptive HARQ retransmission. The terminal according to claim 20, wherein the parsing unit comprises: a second parsing subunit, configured to parse the DCI of the target format to obtain the second NDI information and the HARQ process ID; a third determining subunit, configured to determine, according to the HARQ process ID, the target transport block that performs the uplink non-adaptive HARQ retransmission; a second acquiring subunit, configured to acquire NDI information included in a DCI of a second historical target format, where the DCI of the second historical target format is received by the terminal on the target transport block recently from the current time DCI; a second determining subunit, configured to determine whether the second NDI information is consistent with the NDI information included in the DCI of the second historical target format; a fourth determining subunit, configured to determine, when the second determining subunit determines that the second NDI information is consistent with the NDI information included in the DCI of the second historical target format, The uplink non-adaptive HARQ retransmission needs to be performed on the standard transport block; a fifth determining subunit, configured to determine, at the target transport block, when the second determining subunit determines that the second NDI information is inconsistent with the NDI information included in the DCI of the second historical target format The uplink non-adaptive HARQ retransmission is not performed on the uplink. A terminal according to any one of claims 17 to 21, characterized in that The sending unit is further configured to: when the terminal determines that the uplink non-adaptive HARQ retransmission needs to be performed on the target transport block, re-send to the base station on the PUSCH corresponding to the target transport block. The signal is transmitted upstream.

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