Patent Description:
In the new radio (NR) system, the network device may periodically transmit some common messages, such as system messages, to multiple terminal devices through multicast, broadcast, or multicast. When the network device transmits the common messages, a relatively low code rate is usually used, so that most of the terminal devices can correctly receive the common messages. The terminal devices may periodically receive the common messages according to requirements without performing acknowledgement feedback. However, with the development of wireless communication technology, when a transmission device adopts broadcast or multicast to transmit data information to multiple reception devices, the transmission device needs to know whether the reception devices correctly receive the data information. Therefore, how to implement acknowledgement feedback based on multiple reception devices is a technical issue that needs to be considered.

<CIT> and <CIT> disclose a radio terminal and a base station related to multicast data. The radio terminal receives multicast data belonging to an MBMS service from the base station. The radio terminal includes a receiver configured to receive configuration information indicating one or more common resource pools shared by a plurality of radio terminals to transmit feedback information corresponding to the multicast data to the base station, the configuration information including information indicating a correspondence relationship between an attribute of the feedback information and a common resource pool and/or a signal sequence; a controller configured to select a specific common resource pool used for transmission of the feedback information and/or a specific signal sequence used for transmission of the feedback information, based on the attribute of the feedback information to be transmitted to the base station and the correspondence relationship; and a transmitter configured to transmit the feedback information to the base station by using the specific common resource pool and/or the specific signal sequence.

<CIT> discloses a method and an apparatus for providing and obtaining broadcast multicast service feedback. In particular, it anticipates a manner in which feedback from remote units involved in a broadcast/multicast service session can be obtained using shared wireless resources and/or shared signaling sequences. Having feedback information from at least some of the remote units involved in the session enables the network equipment to dynamically manage the session and potentially improve the performance of the session. Moreover, utilizing shared wireless resources and/ or shared signaling sequences may reduce the overhead cost of obtaining the feedback as compared to utilizing dedicated resources.

The document <NPL>) discusses the HARQ mechanism for NR V2X as well as relevant issues of physical layer procedure and makes some proposals.

The document <NPL>) presents views on physical layer procedure for NR V2X sidelink including the design for HARQ transmission, MIMO and CSI, and power control.

The embodiments of the disclosure provide a wireless communication method, a reception device, and a transmission device. When the transmission device transmits data to at least two reception devices, the at least two reception devices may implement acknowledgement feedback, and the transmission device may implement hybrid automatic repeat request (HARQ) transmission.

In a first aspect, a wireless communication method according to claim <NUM> is provided.

In a second aspect, a wireless communication method according to claim <NUM> is provided.

In a third aspect, an apparatus according to claim <NUM> is provided.

Through the above technical solutions, the transmission device sends the first control channel and the first data channel to the at least two reception devices, and the at least two reception devices may implement the acknowledgement feedback for the first transport block transmitted in the first data channel on the first control resource, thereby implementing the acknowledgement feedback of the reception devices for the same data to improve user expenence.

The technical solutions in the embodiments of the disclosure will be described below in conjunction with the drawings in the embodiments of the disclosure. Obviously, the described embodiments are a part of the embodiments of the disclosure instead of all of the embodiments. Regarding the embodiments in the disclosure, all other embodiments obtained by persons skilled in the art without creative effort belong to the scope of the disclosure.

The embodiments of the disclosure may be applied to various communication systems, such as a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, an advanced long term evolution (LTE-A) system, a new radio (NR) system, an evolution system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a universal mobile telecommunication system (UMTS), a wireless local area networks (WLAN), a wireless fidelity (WiFi), a next-generation communication system, or other communication systems.

Generally speaking, the traditional communication system supports a limited number of connections and is easy to implement. However, with the development of communication technology, the mobile communication system not only supports traditional communication, but also supports, for example, device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to vehicle (V2V) communication, vehicle to everything (V2X) communication, etc. The disclosure may also be applied to the communication systems.

Optionally, the communication system in the embodiment of the disclosure may be applied to a carrier aggregation (CA) scenario, may also be applied to a dual connectivity (DC) scenario, and may also be applied to a standalone (SA) networking scenario.

The embodiments of the disclosure do not limit the applied frequency spectrum. For example, the embodiment of the disclosure may be applied to a licensed spectrum or an unlicensed spectrum.

Exemplarily, a communication system <NUM> applied to the embodiment of the disclosure is shown in <FIG>. The communication system <NUM> may include a network device <NUM>. The network device <NUM> may be a device that communicates with a terminal device <NUM> (also referred to as a communication terminal or a terminal). The network device <NUM> may provide communication coverage for a specific geographic area and may communicate with a terminal device <NUM> located in the coverage area.

<FIG> exemplarily shows one network device <NUM> and two terminal devices <NUM>. Optionally, the communication system <NUM> may include multiple network devices <NUM>, and other numbers of terminal devices <NUM> may be included in the coverage range of each network device <NUM>, which is not limited by the embodiment of the disclosure.

Optionally, the communication system <NUM> may further include other network entities such as a network controller and a mobility management entity, which are not limited by the embodiment of the disclosure.

It should be understood that a device with a communication function in a network/system in the embodiment of the disclosure may be referred to as a communication device. Taking the communication system <NUM> shown in <FIG> as an example, the communication device may include the network device <NUM> and the terminal device <NUM> with communication functions. The network device <NUM> and the terminal device <NUM> may be the specific devices described above, which will not be repeated here. The communication device may further include other devices in the communication system <NUM>, such as other network entities such as a network controller and a mobility management entity, which are not limited by the embodiment of the disclosure.

It should be understood that the terms "system" and "network" in the disclosure are often used interchangeably. The term "and/or" in the disclosure is only used to describe an association relationship of associated objects, which represents that there may be three types of relationships. For example, A and/or B may represent the three situations that A exists alone, A and B exist at the same time, and B exists alone. In addition, the sign "/" in the disclosure generally represents that the previous and next associated objects are in an "or" relationship.

The embodiments of the disclosure describe various embodiments in combination with a terminal device and a network device. The terminal device may also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, a user apparatus, etc. The terminal device may be a station (ST) in a WLAN, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with a wireless communication function, a computing device, other processing devices connected to a wireless modulator-demodulator, an on-board device, a wearable device, and a next-generation communication system, such as a terminal device in an NR network or a terminal device in the future evolution of a public land mobile network (PLMN).

As an example and not a limitation, in the embodiment of the disclosure, the terminal device may also be a wearable device. The wearable device may also be referred to as a wearable smart device, which is a general term for a wearable device developed by applying wearable technology to intelligently design daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into clothes or accessories of the user. The wearable device is not only a hardware device, but also implements powerful functions through software support, data interaction, and cloud interaction. In a broad sense, the wearable smart device includes, for example, a smart watch, smart glasses, etc., that is full-featured, large-sized, may implement complete or partial functions without relying on smart phones, and various smart bracelets, smart jewelries, etc. for monitoring physical signs that only focus on a certain type of application function and need to be used in cooperation with other devices such as smart phones.

The network device may be a device used to communicate with a mobile device. The network device may be an access point (AP) in WLAN, a base transceiver station (BTS) in GSM or CDMA, a node B (NB) in WCDMA, an evolutional node B (eNB or eNodeB) in LTE, a relay station, an access point, an on-board device, a wearable device, a network device or a generation node B (gNB) in an NR network, a network device in the future evolution of a PLMN, etc..

In the embodiment of the disclosure, the network device provides services for a cell. The terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell. The cell may be a cell corresponding to the network device (for example, a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cell may include a metrocell, a microcell, a picocell, a femtocell, etc. The small cells have the characteristics of small coverage range and low emission power and are suitable for providing high-speed data transmission services.

It should be understood that a unicast physical downlink shared channel (PDSCH) transmission process in an NR system may be as shown in <FIG>.

The network device sends a physical downlink control channel (PDCCH) and the PDSCH during a certain HARQ process scheduled by the PDCCH to the terminal device in a time slot n. The PDSCH is used to transmit at least one transport block. The PDCCH may further include instruction information for the terminal device to transmit HARQ feedback corresponding to the PDSCH, such as physical uplink control channel (PUCCH) resource instruction information, downlink assignment index (DAI) information, PUCCH power control command words, PDSCH-to-HARQ feedback time instruction, etc..

After correctly receiving the PDCCH, the terminal device receives the corresponding PDSCH according to scheduling information of the PDSCH included in the PDCCH.

If the terminal device does not correctly receive the PDSCH, the terminal device feeds back negative acknowledgement (NACK) information to the network device on a PUCCH resource (for example, a time slot n+k1 in <FIG>) determined according to the PDCCH. After receiving the NACK information fed back by the terminal device, the network device may use the same HARQ process on a subsequent time resource (for example, a time slot n+k2 in <FIG>) to send a retransmission of the transport block in the PDSCH to the terminal device.

If the terminal device correctly receives the PDSCH, the terminal device feeds back acknowledgement (ACK) information to the network device on the PUCCH resource (for example, the time slot n+k1 in <FIG>) determined according to the PDCCH. After receiving the ACK information fed back by the terminal device, the network device may use the same HARQ process on the subsequent time resource (for example, the time slot n+k2 in <FIG>) to send a new transmission of another PDSCH (that is, a new transport block) to the terminal device.

With the development of wireless communication technology, the transmission device may adopt broadcast or multicast to transmit data information to multiple reception devices, and the transmission device needs to know whether the reception devices correctly receive the data information. For example, during a transmission process of a vehicle to everything (V2X), the vehicle (the transmission device) needs to notify multiple surrounding vehicles (the reception device) of its location, speed, vehicle information, and other parameters in time. For another example, in a wireless high-definition television service, high-definition television content needs to be transmitted to multiple television receiving users in time. Therefore, a new requirement has emerged, that is, for a wireless communication process of performing the same data channel reception on multiple reception devices such as broadcast or multicast, a HARQ transmission process also needs to be considered. However, how to design such acknowledgement feedback based on multiple reception devices is an issue that needs to be considered.

Based on the above technical issues, the embodiment of the disclosure provides a wireless communication method for a wireless communication process of performing the same data channel reception on multiple reception devices such as broadcast or multicast, and HARQ transmission may also be implemented.

The wireless communication solutions designed by the disclosure in response to the above technical issues are described in detail below.

<FIG> is a schematic flowchart of a wireless communication method <NUM> according to an embodiment of the disclosure. As shown in <FIG>, the method <NUM> includes some or all of the following content.

In S210, a transmission device sends a first control channel and a first data channel to at least two reception devices. The first control channel is used to schedule the first data channel. The first data channel is used to transmit a first transport block. The first transport block includes information sent to the at least two reception devices. Feedback information corresponding to the first transport block in the first data channel is transmitted through a first control resource.

In S220, a reception device receives the first control channel sent by the transmission device. The at least two reception devices include the reception device.

In S230, the reception device determines the first control resource. The first control resource is used to transmit the feedback information corresponding to the first transport block in the first data channel.

In S240, the transmission device detects the feedback information corresponding to the first transport block in the first data channel on the first control resource.

In the embodiment of the disclosure, the reception device may monitor the first data channel according to the first control channel, and after determining the first control resource, the reception device may transmit the feedback information corresponding to the first transport block in the first data channel on the first control resource based on a monitoring result of the first data channel.

In the embodiment of the disclosure, a control channel is a physical downlink control channel (PDCCH) or a physical sidelink control channel (PSCCH). A data channel may be a physical downlink shared channel (PDSCH) or a physical sidelink shared channel (PSSCH).

In the embodiment of the disclosure, the method <NUM> is applied to at least one of device to device (D2D) communication, vehicle to vehicle (V2V) communication, vehicle to everything (V2X) communication, machine to machine (M2M) communication, cellular network communication, machine type communication (MTC), etc..

Optionally, in the embodiment of the disclosure, the transmission device may be a network device or a terminal device, and the reception device may also be a network device or a terminal device.

Optionally, the transmission device includes a network device, the reception device includes a terminal device, the control channel includes PDCCH, and a control resource includes a resource in a physical uplink control channel (PDCCH) or a resource in a physical uplink shared channel (PUSCH).

The transmission device includes a terminal device, the reception device includes a terminal device, the control channel includes PSCCH, and the control resource includes a resource in PSCCH, a resource in PSSCH, or other resources for sending the feedback information.

Optionally, the transmission device may send the first control channel and the first data channel to the at least two reception devices through broadcast or multicast.

Optionally, in the embodiment of the disclosure, the first control channel includes first instruction information. The first instruction information is used by the reception device to determine the first control resource. That is, the reception device may determine the first control resource according to the first instruction information. Similarly, the other one reception device of the at least two reception devices may also determine the first control resource according to the first instruction information.

It should be understood that the control channel including the instruction information may indicate that control information transmitted on the control channel includes the instruction information; or may also mean that the control channel carries the instruction information during a transmission process, which is not limited by the disclosure.

Optionally, in the embodiment of the disclosure, the first control channel includes second instruction information.

The second instruction information is used to instruct that the first transport block in the first data channel is newly transmitted data, and/or the second instruction information is used to instruct a redundancy version corresponding to the first transport block in the first data channel.

Optionally, in the embodiment of the disclosure, as Example <NUM>, the first control resource includes a first feedback channel resource. The first feedback channel resource is used to transmit NACK information corresponding to the first transport block in the first data channel.

Optionally, when the reception device does not correctly receive the first data channel, the reception device transmits the NACK information corresponding to the first transport block in the first data channel on the first feedback channel resource; and/ or when the reception device correctly receives the first data channel, the reception device does not perform HARQ feedback on the first feedback channel resource.

That is, when the reception device correctly receives the first data channel, the reception device does not feed back ACK information.

Optionally, in Example <NUM>, when multiple reception devices do not correctly receive the first data channel, the reception devices transmit the same NACK information on the first feedback channel resource; and/or when multiple reception devices correctly receive the first data channel, the reception devices do not perform HARQ feedback on the first feedback channel resource.

Optionally, in Example <NUM>, when multiple reception devices do not correctly receive the first data channel, the reception devices transmit the same NACK information at the same resource location (such as the same time domain, frequency domain, code domain, space domain) in the first feedback channel resource. That is, the NACK information does not contain identification information of the corresponding reception device.

Optionally, in Example <NUM>, the transmission device detects the feedback information on the first feedback channel resource. If the transmission device detects the NACK information on the first feedback channel resource, the transmission device assumes that at least one of the reception devices does not correctly receive the first data channel; and/or if the transmission device does not detect the NACK information on the first feedback channel resource, the transmission device assumes that at least one of the reception devices correctly receives the first data channel.

Optionally, when the first control channel includes the instruction information for determining the first control resource, if the transmission device does not detect the NACK information on the first feedback channel resource, considering that there may be a reception device that does not receive the first control channel, the transmission device may assume that all of the reception devices that receive the first control channel correctly receive the first data channel. Further optionally, if the code rate of information transmitted on the first control channel is very low, under this situation, the transmission device may assume that all of the reception devices correctly receive the first control channel and the first data channel.

In the embodiment of the disclosure, as Example <NUM>, the first control resource includes the first feedback channel resource and a second feedback channel resource. The first feedback channel resource is used to transmit the ACK information corresponding to the first transport block in the first data channel. The second feedback channel resource is used to transmit the NACK information corresponding to the first transport block in the first data channel.

At least one of time domain resources, frequency domain resources, code domain resources, and space domain resources corresponding to the first feedback channel resource and the second feedback channel resource are different.

When the reception device correctly receives the first data channel, the reception device transmits the ACK information corresponding to the first transport block in the first data channel on the first feedback channel resource; and/ or when the reception device does not receive the first data channel, the reception device transmits the NACK information corresponding to the first transport block in the first data channel on the second feedback channel resource.

In Example <NUM>, when the reception devices correctly receive the first data channel, the reception devices transmit the same ACK information on the first feedback channel resource; and/or when the reception devices do not correctly receive the first data channel, the reception devices transmit the same NACK information on the second feedback channel resource.

In Example <NUM>, the transmission device detects the feedback information on the first feedback channel resource, and if the transmission device detects the ACK information on the first feedback channel resource, the transmission device assumes that at least one of the reception devices correctly receives the first data channel; and/or the transmission device detects the feedback information on the second feedback channel resource, and if the transmission device detects the NACK information on the second feedback channel resource, the transmission device assumes that at least one of the reception devices does not correctly receive the first data channel.

Optionally, in the embodiment of the disclosure, as Example <NUM>, the first control resource includes at least two feedback channel resources. The at least two feedback channel resources correspond one-to-one to the at least two reception devices.

It should be noted that each feedback channel resource of the at least two feedback channel resources is used by the corresponding reception device to transmit the ACK information or the NACK information corresponding to the first transport block in the first data channel.

In Example <NUM>, the reception device may determine the first feedback channel resource corresponding to the reception device from the at least two feedback channel resources.

Optionally, the reception device determines the first feedback channel resource corresponding to the reception device from the at least two feedback channel resources according to first configuration information sent by the transmission device. Correspondingly, the transmission device sends the first configuration information to the at least two reception devices. The first configuration information is used by the reception device in the at least two reception devices to determine the corresponding feedback channel resource.

Optionally, the reception device determines location information of the reception device in a first device group according to the first configuration information sent by the transmission device, and determines the first feedback channel resource corresponding to the reception device according to the location information. The first device group includes the at least two reception devices. Correspondingly, the transmission device sends the first configuration information to the at least two reception devices. The first configuration information is used by the reception device in the at least two reception devices to determine its location information in the first device group and is used by the reception device in the at least two reception devices to determine its corresponding feedback channel resource according to the determined location information. The first device group includes the at least two reception devices.

Optionally, the first configuration information is high-level signaling and the first instruction information is physical layer signaling. The reception device jointly determines the first feedback channel resource corresponding to the reception device according to the first configuration information and the first instruction information.

Optionally, when the reception device correctly receives the first data channel, the reception device transmits the ACK information corresponding to the first transport block in the first data channel on the first feedback channel resource.

When the reception device does not correctly receive the first data channel, the reception device transmits the NACK information corresponding to the first transport block in the first data channel on the first feedback channel resource.

Optionally, in Example <NUM>, at least one of time domain resources, frequency domain resources, code domain resources, and space domain resources corresponding to any two of the at least two feedback channel resources are different.

Optionally, in Example <NUM>, when the reception device transmits the ACK information or the NACK information corresponding to the first transport block in the first data channel on the first feedback channel resource, the identification information of the reception device is carried.

Optionally, in Example <NUM>, the transmission device detects the feedback information on the first feedback channel resource. If the transmission device detects the ACK information on the first feedback channel resource, the transmission device may consider that the reception device correctly receives the first data channel; if the transmission device detects the NACK information on the first feedback channel resource, the transmission device may consider that the reception device does not correctly receive the first data channel; and/or if the transmission device does not detect any information on the first feedback channel resource, the transmission device may consider that the reception device does not correctly receive the first control channel and does not correctly receive the first data channel.

Optionally, in the embodiment of the disclosure, as Example <NUM>, the first control resource includes the first feedback channel resource. The first feedback channel resource is used to transmit the ACK information corresponding to the first transport block in the first data channel.

Optionally, when the reception device correctly receives the first data channel, the reception device transmits the ACK information corresponding to the first transport block in the first data channel on the first feedback channel resource; and/ or when the reception device does not correctly receive the first data channel, the reception device does not perform HARQ feedback on the first feedback channel resource.

That is, when the reception device does not correctly receive the first data channel, the reception device does not feed back the NACK information.

Optionally, in Example <NUM>, when the reception devices correctly receive the first data channel, the reception devices transmit the same ACK information on the first feedback channel resource; and/or when the reception devices do not correctly receive the first data channel, the reception devices do not perform HARQ feedback on the first feedback channel resource.

Optionally, in Example <NUM>, when the reception devices do not correctly receive the first data channel, the reception devices transmit the same ACK information at the same resource location (such as the same time domain, frequency domain, code domain, space domain) in the first feedback channel resource. That is, the ACK information does not contain the identification information of the corresponding reception device.

Optionally, in Example <NUM>, the transmission device detects the feedback information on the first feedback channel resource. If the transmission device detects the ACK information on the first feedback channel resource, the transmission device assumes that at least one of the reception devices correctly receives the first data channel; and/or if the transmission device does not detect the ACK information on the first feedback channel resource, the transmission device assumes that all of the reception devices do not correctly receive the first data channel.

Optionally, if the transmission device detects that the signal energy of the ACK information on the first feedback channel resource does not exceed a preset threshold, the transmission device may assume that at least some of the reception devices do not correctly receive the first data channel. Therefore, the transmission device retransmits the first transport block transmitted on the first data channel. Optionally, if the transmission device detects that the signal energy of the ACK information on the first feedback channel resource exceeds the preset threshold, the transmission device does not retransmit the first transport block transmitted on the first data channel.

Optionally, in the embodiment of the disclosure, when the transmission device detects the NACK information on the first control resource, when the signal energy of the ACK information detected by the transmission device on the first control resource does not exceed the preset threshold, or when the transmission device assumes or considers that at least one of the reception devices does not correctly receive the first data channel, the transmission device sends a second control channel and a second data channel to the at least two reception devices. The second control channel is used to schedule the second data channel. The second control channel includes third instruction information. The third instruction information instructs the second data channel for retransmitting the first transport block. It should be noted that the NACK information may be transmitted by any one or more of the at least two reception devices on the first control resource. The ACK information may also be transmitted by any one or more of the at least two reception devices on the first control resource.

Optionally, the reception device transmits the NACK information corresponding to the first transport block through the first control resource.

The reception device receives the second control channel sent by the transmission device. The second control channel is used to schedule the second data channel. The second control channel includes the third instruction information. The third instruction information instructs the second data channel for retransmitting the first transport block.

The reception device determines a second control resource. The second control resource is used to transmit the feedback information corresponding to the first transport block in the second data channel.

Optionally, the third instruction information is further used to instruct the redundancy version corresponding to the first transport block in the second data channel.

Optionally, the second control channel includes fourth instruction information. The fourth instruction information is used by the reception device to determine the second control resource. That is, the reception device may determine the second control resource according to the fourth instruction information. Similarly, the other reception device of the at least two reception devices may also determine the second control resource according to the fourth instruction information.

Optionally, the reception device jointly determines the second control resource according to the first configuration information and the fourth instruction information.

Optionally, in the embodiment of the disclosure, the reception device successfully receives the first data channel.

The reception device does not receive the second data channel.

In other words, when the reception device successfully receives the first data channel and the other reception devices in the at least two reception devices does not successfully receive the first data channel, the reception device receives the second control channel sent by the transmission device. After determining the second data channel scheduled by the second control channel for retransmitting the first transport block, the second data channel may not be received. Thus, the processing complexity of the reception device is reduced and the power consumption is saved.

It should be noted that when the transport block transmitted in one data channel includes data of multiple reception devices, and the data channel corresponds to one feedback resource, if some of the reception devices correctly receive the data of the data channel and feed back the ACK information on the feedback resource, and some of the reception devices do not correctly receive the data of the data channel and feed back the NACK information on the feedback resource, then the ACK information and the NACK information are both on the feedback resource, and the transmission device cannot judge whether information sent on the feedback resource is the ACK information or the NACK information. Based on the solution in the disclosure, such situation may be avoided. Specifically, when the transmission device transmits data to at least two reception devices, the at least two reception devices may implement acknowledgement feedback and may implement HARQ transmission.

Optionally, the wireless communication method <NUM> is described in detail in the following three embodiments, which are specifically exemplified with the transmission device being a network device and the reception device being a terminal device (UE).

Optionally, <FIG> shows Embodiment <NUM>.

A network device sends a first PDCCH and a first PDSCH to UE1 and UE2 in a time slot n. The first PDSCH is used to transmit a first transport block. In addition to scheduling information of the first PDSCH, the first PDCCH further includes first instruction information. The first instruction information is used to determine a first PUCCH resource (time slot n+k1). The instruction information includes at least one of DAI information, PUCCH power control command words, PUCCH resource instruction information, PDSCH-to-HARQ feedback time instruction information, etc. The first PUCCH resource is used to transmit feedback information corresponding to the first PDSCH.

Assuming that UE1 and UE2 do not successfully receive the first PDSCH, then UE1 and UE2 both send NACK feedback information on the first PUCCH resource. Further, if after the time slot n+k1, UE1 and UE2 detect a second PDCCH, and a second PDSCH scheduled by the second PDCCH is used to transmit a retransmission of the first transport block, then UE1 and UE2 need to perform corresponding feedback according to the reception situation of the second PDSCH.

Assuming that UE1 successfully receives the first PDSCH and UE2 does not successfully receive the first PDSCH, then UE1 does not send the feedback information on the first PUCCH resource, and UE2 sends the NACK feedback information on the first PUCCH resource. Further, if after the time slot n+k1, UE1 and UE2 detect the second PDCCH (for example, detect the second PDCCH in a time slot n+k2), and the second PDSCH scheduled by the second PDCCH is used to transmit the retransmission of the first transport block, then UE1 does not need to perform the reception and feedback of the second PDSCH, and the UE2 needs to perform corresponding feedback according to the reception situation of the second PDSCH.

Assuming that UE1 and UE2 both successfully receive the first PDSCH, then UE1 and UE2 both do not send the feedback information on the first PUCCH resource. Further, if after the time slot n+k1, UE1 and/or UE2 detect the second PDCCH (for example, detect the second PDCCH in the time slot n+k2), and the second PDSCH scheduled by the second PDCCH is used to transmit a new transmission of a second transport block, then UE1 and/or UE2 need to perform the reception and feedback of the second PDSCH.

In Embodiment <NUM>, if the network device detects the NACK information on the first PUCCH resource, the network device may retransmit the first transport block in the first PDSCH.

A network device sends a first PDCCH and a first PDSCH to UE1 and UE2 in a time slot n. The first PDSCH is used to transmit a first transport block. In addition to scheduling information of the first PDSCH, the first PDCCH further includes first instruction information. The first instruction information is used to determine a first PUCCH resource and a second PUCCH resource (time slot n+k1). The first instruction information includes at least one of DAI information, PUCCH power control command words, PUCCH resource instruction information, PDSCH-to-HARQ feedback time instruction information, etc. The first PUCCH resource is used to transmit ACK feedback information (may also be referred to as an ACK channel resource) corresponding to the first PDSCH. The second PUCCH resource is used to transmit NACK feedback information (may also be referred to as a NACK channel resource) corresponding to the first PDSCH.

Assuming that UE1 and UE2 do not successfully receive the first PDSCH, then both UE1 and UE2 send the NACK feedback information on the second PUCCH resource. Further, if after the time slot n+k1, UE1 and UE2 detect a second PDCCH, and a second PDSCH scheduled by the second PDCCH is used to transmit a retransmission of the first transport block, then UE1 and UE2 need to perform corresponding feedback according to the reception situation of the second PDSCH.

Assuming that UE1 successfully receives the first PDSCH and UE2 does not successfully receive the first PDSCH, then UE1 sends the ACK feedback information on the first PUCCH resource, and UE2 sends the NACK feedback information on the second PUCCH resource. Further, if after the time slot n+k1, UE1 and UE2 detect the second PDCCH (for example, detect the second PDCCH in a time slot n+k2), and the second PDSCH scheduled by the second PDCCH is used to transmit the retransmission of the first transport block, then UE1 does not need to perform the reception and feedback of the second PDSCH, and UE2 needs to perform corresponding feedback according to the reception situation of the second PDSCH.

Assuming that UE1 and UE2 both successfully receive the first PDSCH, UE1 and UE2 both send the ACK feedback information on the first PUCCH resource. Further, if after the time slot n+k1, UE1 and/or UE2 detect the second PDCCH (for example, detect the second PDCCH in the time slot n+k2), and the second PDSCH scheduled by the second PDCCH is used to transmit a new transmission of a second transport block, then UE1 and/or UE2 need to perform the reception and feedback of the second PDSCH.

In Embodiment <NUM>, if the network device detects the NACK information on the second PUCCH resource, the network device may retransmit the first transport block in the first PDSCH.

A network device determines to perform multicast communication with UE1 and UE2, so the network device preconfigures UE1 and UE2 as a group, denoted as a group A, and UE1 is a first UE in the group A and UE2 is a second UE in the group A. The network device notifies UE1 and UE2 of the preconfiguration information.

The network device sends a first PDCCH and a first PDSCH to UE1 and UE2 in a time slot n. The first PDSCH is used to transmit a first transport block. In addition to scheduling information of the first PDSCH, the first PDCCH further includes first instruction information. The first instruction information is used to determine a PUCCH resource of UE1 and a PUCCH resource of UE2 (time slot n+k1). For example, the first instruction information includes at least one of DAI information, PUCCH power control command words, PUCCH resource instruction information, PDSCH-to-HARQ feedback time instruction information, etc..

After determining the PUCCH resource of UEland the PUCCH resource of UE2 according to the first instruction information, UE1 determines the PUCCH resource of UE1 in the two PUCCH resources, for example, the PUCCH resource of UE1, as its own resource for transmitting feedback information according to its location in the group A. UE2 determines the PUCCH resource of UE2 in the two PUCCH resources, for example, the PUCCH resource of UE2, as its own resource for transmitting the feedback information according to its location in the group A.

Assuming that UE1 successfully receives the first PDSCH, then UE1 feeds back ACK information on the PUCCH resource of UE1. Assuming that UE1 does not successfully receive the first PDSCH, then UE1 feeds back NACK information on the PUCCH resource of UE1. Further, if UE1 successfully receives the first PDSCH, when UE1 detects a second PDCCH, and a second PDSCH scheduled by the second PDCCH is used to transmit a retransmission of the first transport block, UE1 does not need to receive the second PDSCH. Accordingly, since UE1 also does not need to perform feedback for the second PDSCH, instruction information used to instruct the PUCCH resource of UE1 in the second PDCCH may be occupancy information. If UE1 does not successfully receive the first PDSCH, then for the second PDSCH retransmitting the first transport block, UE1 needs to receive the second PDSCH. If UE1 detects the second PDCCH, and the second PDSCH scheduled by the second PDCCH is used to transmit a new transmission of a second transport block, UE1 needs to receive the second PDSCH.

Assuming that UE2 successfully receives the first PDSCH, then UE2 feeds back the ACK information on the PUCCH resource of UE2. Assuming that UE2 does not successfully receive the first PDSCH, then UE2 feeds back the NACK information on the PUCCH resource of UE2. Further, if UE2 successfully receives the first PDSCH, when UE2 detects the second PDCCH, and the second PDSCH scheduled by the second PDCCH is used to transmit the retransmission of the first transport block, UE2 does not need to receive the second PDSCH. Accordingly, since UE2 also does not need to perform feedback for the second PDSCH, the instruction information used to instruct the PUCCH resource of UE2 in the second PDCCH may be the occupancy information. If UE2 does not successfully receive the first PDSCH, then for the second PDSCH retransmitting the first transport block, UE2 needs to receive the second PDSCH. If UE2 detects the second PDCCH, and the second PDSCH scheduled by the second PDCCH is used to transmit the new transmission of the second transport block, UE2 needs to receive the second PDSCH.

In Embodiment <NUM>, if at least one of the first PUCCH resource and the second PUCCH resource transmits the NACK information, the network device may retransmit the first transport block in the first PDSCH.

Therefore, in the embodiment of the disclosure, the transmission device sends the first control channel and the first data channel to the at least two reception devices, and the at least two reception devices may implement the acknowledgement feedback for the first transport block transmitted in the first data channel on the first control resource, thereby implementing the acknowledgement feedback of the reception devices for the same data to improve the user experience.

<FIG> shows a schematic block diagram of a reception device <NUM> according to an embodiment of the disclosure. As shown in <FIG>, the reception device <NUM> includes the following.

A communication unit <NUM> is used to receive a first control channel sent by a transmission device. The first control channel is used to schedule a first data channel. The first data channel is used to transmit a first transport block. The first transport block includes information sent to at least two reception devices. The at least two reception devices include the reception device.

A processing unit <NUM> is used to determine a first control resource. The first control resource is used to transmit feedback information corresponding to the first transport block in the first data channel.

Optionally, the first control channel includes first instruction information. The first instruction information is used by the reception device to determine the first control resource.

Optionally, the first control resource includes a first feedback channel resource. The first feedback channel resource is used to transmit NACK information corresponding to the first transport block in the first data channel.

Optionally, when the reception device <NUM> does not correctly receive the first data channel, the communication unit <NUM> is further used to transmit the NACK information corresponding to the first transport block in the first data channel on the first feedback channel resource; and/or when the reception device <NUM> correctly receives the first data channel, the communication unit <NUM> is further used to not perform HARQ feedback on the first feedback channel resource.

Optionally, when multiple reception devices do not correctly receive the first data channel, the reception devices transmit the same NACK information on the first feedback channel resource; and/or when the reception devices correctly receive the first data channel, the reception devices do not perform HARQ feedback on the first feedback channel resource.

Optionally, the first control resource includes the first feedback channel resource and a second feedback channel resource. The first feedback channel resource is used to transmit the ACK information corresponding to the first transport block in the first data channel. The second feedback channel resource is used to transmit the NACK information corresponding to the first transport block in the first data channel.

Optionally, at least one of time domain resources, frequency domain resources, code domain resources, and space domain resources corresponding to the first feedback channel resource and the second feedback channel resource are different.

Optionally, when the reception device <NUM> correctly receives the first data channel, the communication unit <NUM> is further used to transmit the ACK information corresponding to the first transport block in the first data channel on the first feedback channel resource; and/or when the reception device <NUM> does not receive the first data channel, the communication unit <NUM> is further used to transmit the NACK information corresponding to the first transport block in the first data channel on the second feedback channel resource.

Optionally, when multiple reception devices correctly receive the first data channel, the reception devices transmit the same ACK information on the first feedback channel resource; and/or when the reception devices do not correctly receive the first data channel, the reception devices transmit the same NACK information on the second feedback channel resource.

Optionally, the first control resource includes at least two feedback channel resources. The at least two feedback channel resources correspond one-to-one to the at least two reception devices.

The processing unit <NUM> is further used to determine the first feedback channel resource corresponding to the reception device from the at least two feedback channel resources.

Optionally, at least one of time domain resources, frequency domain resources, code domain resources, and space domain resources corresponding to any two of the at least two feedback channel resources are different.

Optionally, the processing unit <NUM> is specifically used to do the following.

The first feedback channel resource corresponding to the reception device is determined from the at least two feedback channel resources according to first configuration information sent by the transmission device.

Location information of the reception device in a first device group is determined according to the first configuration information sent by the transmission device, and the first feedback channel resource corresponding to the reception device is determined according to the location information. The first device group includes the at least two reception devices.

Optionally, when the reception device <NUM> correctly receives the first data channel, the communication unit <NUM> is further used to transmit the ACK information corresponding to the first transport block in the first data channel on the first feedback channel resource; and/or when the reception device <NUM> does not correctly receive the first data channel, the communication unit <NUM> is further used to transmit the NACK information corresponding to the first transport block in the first data channel on the first feedback channel resource.

Optionally, the first control channel includes second instruction information.

The second instruction information is used to instruct that the first transport block in the first data channel is newly transmitted data, and/or, the second instruction information is used to instruct a redundancy version corresponding to the first transport block in the first data channel.

Optionally, the communication unit <NUM> is further used to receive a second control channel sent by the transmission device. The second control channel is used to schedule a second data channel. The second control channel includes third instruction information. The third instruction information instructs the second data channel for retransmitting the first transport block.

When the reception device <NUM> transmits the NACK information corresponding to the first transport block through the first control resource, the processing unit <NUM> is further used to determine a second control resource. The second control resource is used to transmit the feedback information corresponding to the first transport block in the second data channel.

Optionally, the second control channel includes fourth instruction information. The fourth instruction information is used by the reception device to determine the second control resource.

Optionally, the communication unit <NUM> is further used to receive the second control channel sent by the transmission device. The second control channel is used to schedule the second data channel. The second control channel includes the third instruction information. The third instruction information instructs the second data channel for retransmitting the first transport block.

When the reception device <NUM> successfully receives the first data channel, the communication unit <NUM> is further used not to receive the second data channel.

Optionally, the reception device <NUM> is applied to at least one of D2D communication, V2V communication, V2X communication, cellular network communication, and MTC.

It should be understood that the reception device <NUM> according to the embodiment of the disclosure may correspond to the reception device in the embodiment of the method of the disclosure, and the foregoing and other operations and/or functions of each unit in the reception device <NUM> respectively implement the corresponding process of the reception device in the method <NUM> shown in <FIG>, which will not be repeated here for the sake of brevity.

<FIG> shows a schematic block diagram of a transmission device <NUM> according to an embodiment of the disclosure. As shown in <FIG>, the transmission device <NUM> includes the following.

A communication unit <NUM> is used to send a first control channel and a first data channel to at least two reception devices. The first control channel is used to schedule the first data channel. The first data channel is used to transmit a first transport block. The first transport block includes information sent to the at least two reception devices. Feedback information corresponding to the first transport block in the first data channel is transmitted through a first control resource.

The communication unit <NUM> is further used to detect the feedback information corresponding to the first transport block in the first data channel on the first control resource.

Optionally, the first control channel includes first instruction information. The first instruction information is used for at least one of the at least two reception devices to determine the first control resource.

Optionally, the transmission device <NUM> further includes a processing unit <NUM>. When the transmission device <NUM> detects the NACK information on the first feedback channel resource, the processing unit <NUM> assumes that at least one of the at least two reception devices does not correctly receive the first data channel; and/or when the transmission device <NUM> does not detect the NACK information on the first feedback channel resource, the processing unit <NUM> assumes that at least one of the at least two reception devices correctly receives the first data channel.

Optionally, the first control resource includes a first feedback channel resource and a second feedback channel resource. The first feedback channel resource is used to transmit the ACK information corresponding to the first transport block in the first data channel. The second feedback channel resource is used to transmit the NACK information corresponding to the first transport block in the first data channel.

Optionally, the transmission device <NUM> further includes the processing unit <NUM>.

When the transmission device <NUM> detects the ACK information on the first feedback channel resource, the processing unit <NUM> assumes that at least one of the at least two reception devices correctly receives the first data channel; and/or when the transmission device <NUM> detects the NACK information on the second feedback channel resource, the processing unit <NUM> assumes that at least one of the at least two reception devices does not correctly receive the first data channel.

Optionally, the at least two reception devices include a first reception device.

The communication unit <NUM> is further used to send first configuration information to the first reception device. The first configuration information is used by the first reception device to determine its corresponding first feedback channel resource.

Optionally, the at least two reception devices include the first reception device.

The communication unit <NUM> is further used to send the first configuration information to the first reception device. The first configuration information is used by the first reception device to determine its location information in a first device group and is used by the first reception device to determine its corresponding first feedback channel resource according to the determined location information. The first device group includes the at least two reception devices.

When the transmission device <NUM> detects the ACK information on the first feedback channel resource, the processing unit <NUM> assumes that the first reception device correctly receives the first data channel; and/or when the transmission device <NUM> detects the NACK information on the first feedback channel resource, the processing unit <NUM> assumes that the first reception device does not correctly receive the first data channel; and/or when the transmission device <NUM> does not detect any information on the first feedback channel resource, the processing unit <NUM> assumes that the first reception device does not correctly receive the first data channel.

The second instruction information is used to instruct that the first transport block in the first data channel is newly transmitted data; and/or the second instruction information is used to instruct a redundancy version corresponding to the first transport block in the first data channel.

Optionally, the transmission device <NUM> detects the NACK information on the first control resource as the followings.

The communication unit <NUM> is further used to send a second control channel and a second data channel to the at least two reception devices. The second control channel is used to schedule the second data channel. The second control channel includes third instruction information. The third instruction information instructs the second data channel for retransmitting the first transport block.

Optionally, the communication unit <NUM> is further used to detect the feedback information corresponding to the first transport block in the second data channel on a second control resource. The second control resource is used to transmit the feedback information corresponding to the first transport block in the second data channel.

Optionally, the second control channel includes fourth instruction information. The fourth instruction information is used by the at least two reception devices to determine the second control resource.

Optionally, the transmission device <NUM> is applied to at least one of D2D communication, V2V communication, V2X communication, cellular network communication, and MTC.

It should be understood that the transmission device <NUM> according to the embodiment of the disclosure may correspond to the transmission device in the embodiment of the method of the disclosure, and the foregoing and other operations and/or functions of each unit in the transmission device <NUM> respectively implement the corresponding process of the transmission device in the method <NUM> shown in <FIG>, which will not be repeated here for the sake of brevity.

<FIG> is a schematic structural diagram of a communication device <NUM> according to an embodiment of the disclosure. The communication device <NUM> shown in <FIG> includes a processor <NUM>. The processor <NUM> calls and runs a computer program from a memory <NUM> to implement the method in the embodiment of the disclosure.

As shown in <FIG>, the communication device <NUM> further includes a memory <NUM>. The processor <NUM> calls and run a computer program from the memory <NUM> to implement the method in the embodiment of the disclosure.

Optionally, as shown in <FIG>, the communication device <NUM> may further include a transceiver <NUM>. The processor <NUM> may control the transceiver <NUM> to communicate with other devices. Specifically, the transceiver <NUM> may send information or data to other devices or receive information or data sent by other devices.

The transceiver <NUM> may further include an antenna. The number of the antenna may be one or more.

Optionally, the communication device <NUM> may specifically be the transmission device of the embodiment of the disclosure, and the communication device <NUM> may implement the corresponding process implemented by the transmission device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Optionally, the communication device <NUM> may specifically be the reception device of the embodiment of the disclosure, and the communication device <NUM> may implement the corresponding process implemented by the reception device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

<FIG> is a schematic structural diagram of an apparatus according to an embodiment of the disclosure. An apparatus <NUM> shown in <FIG> includes a processor <NUM>. The processor <NUM> calls and runs a computer program from a memory <NUM> to implement the method in the embodiment of the disclosure.

As shown in <FIG>, the apparatus <NUM> further includes a memory <NUM>. The processor <NUM> calls and runs a computer program from the memory <NUM> to implement the method in the embodiment of the disclosure.

Optionally, the apparatus <NUM> may further include an input interface <NUM>. The processor <NUM> may control the input interface <NUM> to communicate with other devices or chips. Specifically, the input interface <NUM> may obtain information or data sent by other devices or chips.

Optionally, the apparatus <NUM> may further include an output interface <NUM>. The processor <NUM> may control the output interface <NUM> to communicate with other devices or chips. Specifically, the output interface <NUM> may output information or data to other devices or chips.

Optionally, the apparatus may be applied to the transmission device in the embodiment of the disclosure, and the apparatus may implement the corresponding process implemented by the transmission device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Optionally, the apparatus may be applied to the reception device in the embodiment of the disclosure, and the apparatus may implement the corresponding process implemented by the reception device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Optionally, the apparatus mentioned in the embodiment of the disclosure may also be a chip. For example, the device may be a system-level chip, a system chip, a chip system, a system-on-chip, etc..

<FIG> is a schematic block diagram of a communication system <NUM> according to an embodiment of the disclosure. As shown in <FIG>, the communication system <NUM> includes a reception device <NUM> and a transmission device <NUM>.

The reception device <NUM> may be used to implement the corresponding functions implemented by the reception device in the above method, and the transmission device <NUM> may be used to implement the corresponding functions implemented by the transmission device in the above method, which will not be repeated here.

It should be understood that the processor in the embodiment of the disclosure may be an integrated circuit chip with signal processing capability. During the implementation process, each step of the embodiment of the method may be completed by hardware integrated logic circuits in the processor or commands in the form of software. The processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components that may implement or execute each method, step, and logical block diagram disclosed in the embodiment of the disclosure. The general processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps in combination with the method disclosed in the embodiment of the disclosure may be directly embodied as being executed and completed by a hardware decoding processor or executed and completed by a combination of hardware and software modules in a decoding processor. The software module may be located in a mature storage medium in the art such as random memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is located in the memory. The processor reads information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the disclosure may be a volatile memory or a non-volatile memory or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. Through exemplary but not restrictive description, many forms of RAM may be used, such as a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synchlink DRAM (SLDRAM), and a direct rambus RAM (DR RAM). It should be noted that the memory of the system and the method described herein is intended to include but not limited to these and any other suitable types of memories.

It should be understood that the memory is exemplary but not restrictive description. For example, the memory in the embodiment of the disclosure may also be a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synch link DRAM (SLDRAM), a direct rambus RAM (DR RAM), etc. In order words, the memory in the embodiment of the disclosure is intended to include but not limited to these and any other suitable types of memories.

The embodiment of the disclosure further provides a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium may be applied to the transmission device in the embodiment of the disclosure, and the computer program enables a computer to execute the corresponding process implemented by the transmission device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Optionally, the computer-readable storage medium may be applied to the reception device in the embodiment of the disclosure, and the computer program enables the computer to execute the corresponding process implemented by the reception device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

The embodiment of the disclosure further provides a computer program product, which includes a computer program command.

Optionally, the computer program product may be applied to the transmission device in the embodiment of the disclosure, and the computer program instruction enables the computer to execute the corresponding process implemented by the transmission device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Optionally, the computer program product may be applied to the reception device in the embodiment of the disclosure, and the computer program instruction enables the computer to execute the corresponding process implemented by the reception device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

The embodiment of the disclosure further provides a computer program.

Optionally, the computer program may be applied to the transmission device in the embodiment of the disclosure. When the computer program is run on the computer, the computer is enabled to execute the corresponding process implemented by the transmission device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Optionally, the computer program may be applied to the reception device in the embodiment of the disclosure. When the computer program is run on the computer, the computer is enabled to execute the corresponding process implemented by the reception device in each method of the embodiment of the disclosure, which will not be repeated here for the sake of brevity.

Persons skilled in the art may be aware that the units and calculation steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians may use different methods for each specific application to implement the described functions, but such implementation should not be considered as exceeding the scope of the disclosure.

Persons skilled in the art may clearly understand that for the convenience and brevity of description, for the specific working processes of the system, the apparatus, and the unit described above, reference may be made to the corresponding processes in the embodiment of the method, which will not be repeated here.

In the several embodiments provided in the disclosure, it should be understood that the disclosed system, apparatus, and method may be implemented through other ways. For example, the embodiment of the apparatus described above is merely illustrative. For example, the division of the unit is only a logical function division, and there may be other ways of division during actual implementation. For example, multiple units or components may be combined or may be integrated into another system, or some features may be ignored or not implemented. In addition, the displayed or discussed mutual coupling, direct coupling, or communication connection may be indirect coupling or communication connection through some interfaces, apparatuses, or units, and may be in electrical, mechanical, or other forms.

The units described as separate parts may or may not be physically separated. The parts displayed as units may or may not be physical units, that is, the parts may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual requirements to implement the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the disclosure may be integrated into one processing unit, each unit may exist alone physically, or two or more units may be integrated into one unit.

Claim 1:
A wireless communication method, comprising:
receiving (S220), by a reception device (<NUM>, <NUM>, <NUM>, <NUM>), a first control channel sent by a transmission device (<NUM>, <NUM>, <NUM>, <NUM>), wherein the first control channel is used to schedule a first data channel, the first data channel is used to transmit a first transport block, the first transport block comprises information sent to at least two reception devices (<NUM>, <NUM>, <NUM>, <NUM>), and the at least two reception devices (<NUM>, <NUM>, <NUM>, <NUM>) comprise the reception device (<NUM>, <NUM>, <NUM>, <NUM>), the reception device comprises a terminal device, the transmission device comprises another terminal device, and the first control channel comprises physical sidelink control channel, named PSCCH;
determining (S230), by the reception device (<NUM>, <NUM>, <NUM>, <NUM>), a first control resource, wherein the first control resource is used to transmit feedback information corresponding to the first transport block in the first data channel, wherein the first control resource comprises a first feedback channel resource and a second feedback channel resource, the first feedback channel resource is used by the at least two reception devices in order to transmit the same acknowledgement, named ACK, information corresponding to the first transport block when the at least two reception devices correctly receive the first data channel, the second feedback channel resource is used by the at least two reception devices in order to transmit the same negative acknowledgement, named NACK, information corresponding to the first transport block when the at least two reception devices do not correctly receive the first data channel, code domain resources corresponding to the first feedback channel resource and the second feedback channel resource are different;
transmitting, by the reception device (<NUM>, <NUM>, <NUM>, <NUM>), ACK information corresponding to the first transport block in the first data channel on the first feedback channel resource when the reception device (<NUM>, <NUM>, <NUM>, <NUM>) correctly receives the first data channel; and
transmitting, by the reception device (<NUM>, <NUM>, <NUM>, <NUM>), NACK information corresponding to the first transport block in the first data channel on the second feedback channel resource when the reception device (<NUM>, <NUM>, <NUM>, <NUM>) does not receive the first data channel.