User equipment, electronic equipment, wireless communication method and storage medium

Abstract

The present disclosure relates to user equipment, electronic devices, wireless communication methods and storage media. The user equipment according to the present disclosure includes a processing circuit, which is configured to: demodulate a downlink signal from a network side device to obtain a physical downlink control channel PDCCH contained therein; and determine whether to perform hybrid automatic repeat request HARQ feedback for the DCI according to the content of the downlink control information DCI carried by the PDCCH. Using the user equipment, electronic devices, wireless communication methods and computer-readable storage media according to the present disclosure, the reliability of the control information carried by the PDCCH can be improved.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on April 27, 2018, with application number 201810393956.0 and invention name “User Equipment, Electronic Equipment, Wireless Communication Method and Storage Medium”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] Embodiments of the present disclosure generally relate to the field of wireless communications, and specifically relate to user equipment, electronic equipment, wireless communication methods, and computer-readable storage media in a wireless communication system. More specifically, the present disclosure relates to a user equipment in a wireless communication system, an electronic equipment as a network-side device in the wireless communication system, a wireless communication method performed by a user equipment in the wireless communication system, a wireless communication method performed by a network-side device in the wireless communication system, and a computer-readable storage medium. Background Art

[0003] Hybrid Automatic Repeat Request (HARQ) technology can effectively compensate for the time-varying characteristics of wireless mobile channels and the impact of multipath fading on signal transmission. When decoding fails, the receiver using HARQ technology saves the received data and requests the sender to retransmit the data. The receiver combines the retransmitted data with the previously received data and then decodes it, thereby achieving a certain diversity gain, reducing the number of retransmissions, thereby reducing delays and improving the reliability of data transmission.

[0004] In traditional HARQ technology, the receiver mainly provides feedback for data information, thereby improving the reliability of data information transmission. For control information sent through high-level signaling, such as RRC (Radio Resource Control) layer signaling and MAC (Media Access Control) layer signaling such as MAC CE, since it is carried as data by the Physical Downlink Share Channel (PDSCH), HARQ technology can also be applied. At present, the application of the HARQ mechanism to the control information carried by the Physical Downlink Control Channel (PDCCH) has not been discussed. As we all know, the control information carried by the PDCCH is crucial to the user equipment. If the user equipment cannot successfully obtain the control information carried by the PDCCH, it will affect the demodulation of the downlink data information and the transmission of the uplink data information.

[0005] Therefore, it is necessary to propose a technical solution to provide a HARQ feedback mechanism for the control information carried by the PDCCH, thereby improving the reliability of the control information carried by the PDCCH. Summary of the invention

[0006] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0007] The purpose of the present disclosure is to provide a user equipment, an electronic device, a wireless communication method and a computer-readable storage medium to improve the reliability of control information carried by a PDCCH.

[0008] According to one aspect of the present disclosure, a user equipment is provided, comprising a processing circuit, configured to: demodulate a downlink signal from a network side device to obtain a physical downlink control channel PDCCH contained therein; and determine whether to perform hybrid automatic repeat request HARQ feedback for the DCI based on the content of downlink control information DCI carried by the PDCCH.

[0009] According to another aspect of the present disclosure, an electronic device used as a network side device is provided, including a processing circuit, configured to: send a downlink signal containing a physical downlink control channel PDCCH to a user equipment; and determine whether to receive a hybrid automatic repeat request HARQ feedback message for the DCI from the user equipment based on the content of the downlink control information DCI carried by the PDCCH.

[0010] According to another aspect of the present disclosure, a user equipment is provided, comprising a processing circuit, configured to: receive first data information, second data information, first control information for the first data information, and second control information for the second data information from a network side device, wherein the first data information includes the second control information, and the second data information includes the first control information; and decode the information received from the network side device to obtain the first data information and the second data information.

[0011] According to another aspect of the present disclosure, there is provided an electronic device used as a network side device, comprising a processing circuit, configured to: send first data information, second data information, first control information for the first data information, and second control information for the second data information to a user device, wherein the first data information includes the second control information, and the second data information includes the first control information.

[0012] According to another aspect of the present disclosure, an electronic device used as a network side device is provided, including a processing circuit, configured to: receive second control information for second data information from other network side devices other than the electronic device; send first control information for first data information to the other network side devices, so that the other network side devices include the first control information in the second data information; and send first data information and first control information to a user device, the first data information including the second control information, wherein the first data information is downlink data information sent by the electronic device to the user device, and the second data information is downlink data information sent by the other network side devices to the user device.

[0013] According to another aspect of the present disclosure, a wireless communication method performed by a user equipment is provided, comprising: demodulating a downlink signal from a network side device to obtain a physical downlink control channel PDCCH contained therein; and determining whether to perform a hybrid automatic repeat request HARQ feedback for the DCI based on the content of the downlink control information DCI carried by the PDCCH.

[0014] According to another aspect of the present disclosure, a wireless communication method performed by a network side device is provided, including: sending a downlink signal containing a physical downlink control channel PDCCH to a user equipment; and determining whether to receive a hybrid automatic repeat request HARQ feedback message for the DCI from the user equipment based on the content of the downlink control information DCI carried by the PDCCH.

[0015] According to another aspect of the present disclosure, a wireless communication method performed by a network side device is provided, including: receiving second control information for second data information from other network side devices except the network side device; sending first control information for first data information to the other network side devices, so that the other network side devices include the first control information in the second data information; and sending first data information and first control information to a user equipment, the first data information including the second control information, wherein the first data information is downlink data information sent by the network side device to the user equipment, and the second data information is downlink data information sent by the other network side devices to the user equipment.

[0016] According to another aspect of the present disclosure, a computer-readable storage medium is provided, comprising executable computer instructions, which, when executed by a computer, enable the computer to perform the wireless communication method according to the present disclosure.

[0017] Using the user equipment, electronic device, wireless communication method and computer-readable storage medium according to the present disclosure, the user equipment can determine whether to perform HARQ feedback for the DCI based on the content of the DCI carried by the PDCCH, and the network side device can also determine whether to receive a HARQ feedback message for the DCI from the user equipment based on the content of the DCI, thereby realizing the application of the HARQ feedback mechanism on the PDCCH and improving the transmission reliability of the DCI carried by the PDCCH.

[0018] Using the user equipment, electronic device, wireless communication method and computer-readable storage medium according to the present disclosure, the network side device can send the first data information, the second data information, the first control information for the first data information and the second control information for the second data information to the user equipment, wherein the first data information includes the second control information, and the second data information includes the first control information, so that the user equipment can obtain the first data information and the second data information according to the information received from the network side device. In this way, the first control information and the second control information are sent twice, thereby achieving diversity gain and further improving the transmission reliability of the PDCCH.

[0019] Further areas of applicability will become apparent from the description provided herein.The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure. In the drawings:

[0021] Figure 1 is a block diagram showing an example of a configuration of a user equipment according to an embodiment of the present disclosure;

[0022] Figure 2 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0023] Figure 3 It is shown Figure 2 A schematic diagram of the configuration of time slots of the illustrated embodiment;

[0024] Figure 4 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0025] Figure 5 It is shown Figure 4 A schematic diagram of the configuration of time slots of the illustrated embodiment;

[0026] Figure 6is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0027] Figure 7 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0028] Figure 8 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0029] Fig. 9 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0030] Fig.10 It is shown Fig. 9 A schematic diagram of the configuration of time slots of the illustrated embodiment;

[0031] Fig.11 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0032] Fig.12 It is shown Fig.11 A schematic diagram of the configuration of time slots of the illustrated embodiment;

[0033] Fig.13 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0034] Fig.14 It is shown Fig.13 A schematic diagram of the configuration of time slots of the illustrated embodiment;

[0035] Fig.15 is a schematic diagram showing a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure;

[0036] Fig.16 is a schematic diagram showing a process of backing up a PDCCH according to an embodiment of the present disclosure;

[0037] Fig.17 is a block diagram showing an example of a configuration of an electronic device as a network side device according to an embodiment of the present disclosure;

[0038] Fig.18 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0039] Fig.19 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0040] Fig. 20 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0041] Fig.21 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0042] Fig. 22 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0043] Fig.23 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0044] Fig.24 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0045] Fig.25 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0046] Fig.26 is a signaling flow chart illustrating performing HARQ feedback for PDCCH according to an embodiment of the present disclosure;

[0047] Fig. 27 is a signaling flow chart showing a backup PDCCH according to an embodiment of the present disclosure;

[0048] Fig.28 is a flowchart illustrating a wireless communication method performed by a user equipment according to an embodiment of the present disclosure;

[0049] Fig.29 is a flowchart illustrating a wireless communication method performed by an electronic device as a network side device according to an embodiment of the present disclosure;

[0050] Fig.30 is a flowchart illustrating a wireless communication method performed by a user equipment according to an embodiment of the present disclosure;

[0051] FIG. 31( a ) is a flowchart illustrating a wireless communication method performed by an electronic device as a network side device according to an embodiment of the present disclosure;

[0052] FIG31( b) is a flowchart illustrating a wireless communication method performed by an electronic device as a network side device according to an embodiment of the present disclosure;

[0053] Fig.32is a block diagram showing a first example of a schematic configuration of an eNB (Evolved Node B);

[0054] Fig.33 is a block diagram showing a second example of a schematic configuration of an eNB;

[0055] Fig.34 is a block diagram showing an example of a schematic configuration of a smartphone; and

[0056] Fig.35 is a block diagram showing an example of a schematic configuration of a car navigation device.

[0057] Although the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown as examples in the drawings and are described in detail herein. It should be understood, however, that the description of specific embodiments herein is not intended to limit the present disclosure to the specific forms disclosed, but rather, the present disclosure is intended to cover all modifications, equivalents, and alternatives that fall within the spirit and scope of the present disclosure. It should be noted that throughout the several drawings, corresponding reference numerals indicate corresponding parts. DETAILED DESCRIPTION

[0058] Examples of the present disclosure will now be described more fully with reference to the accompanying drawings.The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

[0059] Example embodiments are provided so that the disclosure will be exhaustive and its scope will be fully conveyed to those skilled in the art. Numerous specific details such as examples of specific components, devices and methods are set forth to provide a detailed understanding of the embodiments of the present disclosure. It will be apparent to those skilled in the art that the example embodiments may be implemented in many different forms without the use of specific details, none of which should be construed as limiting the scope of the present disclosure. In certain example embodiments, well-known processes, well-known structures and well-known techniques are not described in detail.

[0060] The description will be in the following order:

[0061] 1. Description of the scene;

[0062] 2. Example of configuration of a user equipment performing HARQ feedback for PDCCH;

[0063] 3. Configuration example of user equipment for backing up PDCCH;

[0064] 4. Configuration example of a network side device for performing HARQ feedback for PDCCH;

[0065] 5. Configuration example of network side equipment for backing up PDCCH;

[0066] 6. Method embodiments;

[0067] 7. Application examples.

[0068] <1. Description of the scene>

[0069] The network side device can send DCI to the user equipment within its coverage through PDCCH. The user equipment can obtain control information by demodulating the DCI carried by PDCCH, so as to perform subsequent operations, such as demodulating downlink data information and sending uplink data information.

[0070] In the NR (New Radio) communication system, the formats of DCI that can be carried by PDCCH include DCI format 0 (DCI format 0), DCI format 1 (DCI format 1) and DCI format 2 (DCI format 2). Among them, DCI format 0 represents control information related to uplink transmission between user equipment and network side equipment, such as control information related to PUSCH (Physical Uplink Share Channel) transmission and control information related to CSI (Channel State Information) reporting trigger, etc., and currently mainly includes DCI format 0_0 and DCI format 0_1. DCI format 1 represents control information related to downlink transmission between user equipment and network side equipment, such as control information related to PDSCH transmission, etc., and currently mainly includes DCI format 1_0 and DCI format 1_1. DCI format 2 represents control information other than DCI format 0 and DCI format 1, such as control information related to GC-PDCCH (Group Common-Physical Downlink Control Channel) and power control, and currently mainly includes DCI format 2_0, DCI format 2_1, DCI format 2_2 and DCI format 2_3.

[0071] The present disclosure proposes a user equipment in a wireless communication system, an electronic device as a network side device, a wireless communication method performed by the network side device in the wireless communication system, a wireless communication method performed by the user equipment in the wireless communication system, and a computer-readable storage medium to improve the transmission reliability of the DCI carried by the PDCCH.

[0072] The wireless communication system according to the present disclosure may be a 5G NR communication system. In the NR communication system, the URLLC (Ultra Reliable & Low Latency Communication) high-reliability and low-latency communication service requires an error probability of 10^-5 for the control channel, which is more stringent than other service types. The device and method disclosed in the present disclosure can ensure the transmission reliability of the PDCCH of the URLLC service.

[0073] The network side device according to the present disclosure may be any type of TRP (Transmit and Receive Port). The TRP may have sending and receiving functions, for example, it may receive information from a user device and a base station device, and it may also send information to a user device and a base station device. In one example, the TRP may provide services to the user device and be controlled by the base station device. That is, the base station device provides services to the user device through the TRP. In addition, the network side device described in the present disclosure may also be a base station device, for example, it may be an eNB or a gNB (a base station in a 5th generation communication system).

[0074] The user equipment according to the present disclosure may be a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / dongle-type mobile router, and a digital camera) or a vehicle-mounted terminal (such as a car navigation device). The user equipment may also be implemented as a terminal that performs machine-to-machine (M2M) communication (also referred to as a machine type communication (MTC) terminal). In addition, the user equipment may be a wireless communication module (such as an integrated circuit module including a single chip) installed on each of the above-mentioned terminals.

[0075] <2. Configuration Example of User Equipment Performing HARQ Feedback for PDCCH>

[0076] Figure 1 1 is a block diagram showing an example of a configuration of a user equipment 100 according to an embodiment of the present disclosure. The electronic device 100 here can be used as a user equipment in a wireless communication system.

[0077] like Figure 1 As shown, the user equipment 100 may include a communication unit 110 , a demodulation unit 120 and a determination unit 130 .

[0078] Here, each unit of the user equipment 100 may be included in a processing circuit. It should be noted that the user equipment 100 may include one processing circuit or multiple processing circuits. Further, the processing circuit may include various discrete functional units to perform various functions and / or operations. It should be noted that these functional units may be physical entities or logical entities, and units with different names may be implemented by the same physical entity.

[0079] According to an embodiment of the present disclosure, the communication unit 110 may receive a downlink signal from a network side device. Here, the network side device may be a network side device that provides services for the user equipment 100, so that the user equipment 100 may receive a downlink signal from the network side device.

[0080] According to an embodiment of the present disclosure, the demodulation unit 120 may demodulate a downlink signal from a network-side device to obtain a PDCCH contained therein. Further, the downlink signal may include a DCI carried by the PDCCH.

[0081] According to an embodiment of the present disclosure, the determining unit 130 may determine whether to perform HARQ feedback for the DCI according to the content of the DCI carried by the PDCCH.

[0082] As described above, according to the user equipment 100 of the embodiment of the present disclosure, it can determine whether to perform HARQ feedback for the DCI according to the content of the DCI carried by the PDCCH, thereby realizing the application of the HARQ feedback mechanism on the PDCCH and improving the transmission reliability of the DCI carried by the PDCCH.

[0083] According to an embodiment of the present disclosure, the determining unit 130 may determine whether to perform HARQ feedback for the DCI according to whether the DCI carried by the PDCCH includes control information related to uplink transmission or includes control information related to downlink transmission.

[0084] According to an embodiment of the present disclosure, the determination unit 130 may determine whether the DCI includes control information related to uplink transmission or includes control information related to downlink transmission according to the format of the DCI carried by the PDCCH. As described above, when the format of the DCI is DCI format 0, the determination unit 130 may determine that the DCI includes control information related to uplink transmission; when the format of the DCI is DCI format 1, the determination unit 130 may determine that the DCI includes control information related to downlink transmission.

[0085] According to an embodiment of the present disclosure, when the determination unit 130 determines that the DCI includes control information related to downlink transmission, it can determine to perform HARQ feedback for the DCI. Here, when the DCI includes control information related to downlink transmission, the DCI can adopt DCI format 1.

[0086] According to an embodiment of the present disclosure, when the determination unit 130 determines that the DCI includes control information related to uplink transmission, it can be determined not to perform HARQ feedback for the DCI. Here, when the DCI includes control information related to uplink transmission, the DCI can use DCI format 0.

[0087] According to an embodiment of the present disclosure, when the DCI includes control information related to uplink transmission, the user equipment 100 can implicitly feedback to the network side device whether the DCI is correctly decoded. For example, when the DCI includes a CSI reporting request, that is, requesting the user equipment 100 to subsequently report the CSI to the network side device, the network side device can determine whether the user equipment 100 has correctly decoded the DCI from the received CSI report. For another example, when the DCI includes control information related to the transmission of PUSCH, that is, requesting the user equipment 100 to send uplink data to the network side device through PUSCH, the network side device can determine whether the user equipment 100 has correctly decoded the DCI by observing whether there is PUSCH on the uplink resources indicated by the DCI. That is, when the DCI includes control information related to uplink transmission, the user equipment 100 can implicitly feedback to the network side device whether the DCI is correctly decoded through the behavior related to the DCI, and this implicit feedback can also improve the transmission reliability of the DCI related to the uplink transmission. In this case, according to the embodiment of the present disclosure, the user equipment 100 does not perform HARQ feedback for the DCI, which can save signaling overhead and reduce latency.

[0088] As described above, according to an embodiment of the present disclosure, the user equipment 100 can determine whether to perform HARQ feedback based on the content of the DCI, and perform HARQ feedback only when the DCI includes control information related to downlink transmission, thereby saving overhead while improving transmission reliability.

[0089] According to an embodiment of the present disclosure, the demodulation unit 120 may also demodulate and decode the DCI.

[0090] Further, if Figure 1 As shown, the user equipment 100 may further include a feedback unit 140, which is used to generate feedback information when HARQ feedback is required for the DCI carried by the PDCCH. The feedback information here may include an ACK message and a NACK message.

[0091] According to an embodiment of the present disclosure, when the DCI is correctly decoded, the feedback unit 140 can generate an ACK message for the DCI and send the ACK message for the DCI to the network side device. Further, in this case, the user equipment 100 can also receive downlink data from the network side device according to the correctly decoded DCI.

[0092] Figure 2 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Figure 2 FIG. 1 is a schematic diagram showing the correct decoding of the DCI carried by the PDCCH. Figure 2 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Figure 2 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send PDCCH to the user equipment. Next, the user equipment sends an ACK message for PDCCH to the network side device. Here, the user equipment can use PUCCH (Physical Uplink Control Channel) to carry the ACK message for PDCCH. Next, after receiving the ACK message for PDCCH, the network side device uses the PDSCH indicated in the PDCCH to send downlink data information to the user equipment. In this article, since PDCCH carries DCI, no specific distinction is made between PDCCH and DCI in this article, so that the ACK message for PDCCH refers to the ACK message for DCI carried by PDCCH.

[0093] Figure 3 It is shown Figure 2 A schematic diagram of the configuration of time slots of the illustrated embodiment. Figure 3 FIG. 1 is a schematic diagram showing the configuration of a time slot including 14 OFDM symbols. Figure 3 As shown in the figure, the first OFDM symbol of the time slot is used for downlink transmission, and the network side device sends PDCCH to the user equipment; the second OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries the ACK message for PDCCH; the 3rd to 13th OFDM symbols of the time slot are used for downlink transmission, and the network side device sends PDSCH to the user equipment; the 14th OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends the HARQ feedback message for PDSCH to the network side device. It is worth noting that Figure 3 This is just an exemplary time slot configuration. For example, Figure 3Although the case where the PDCCH occupies one OFDM symbol is shown, of course the PDCCH may also occupy two or three OFDM symbols. In addition, the PDSCH may also occupy other numbers of OFDM symbols.

[0094] As described above, according to the embodiments of the present disclosure, when the DCI is correctly decoded, the user equipment 100 can generate an ACK message for the DCI, so that the network side device can send downlink data to the user equipment 100 according to the ACK message.

[0095] According to an embodiment of the present disclosure, in the case where the DCI is not correctly decoded, the feedback unit 140 may generate a NACK message for the DCI and send a NACK message for the DCI to the network side device. Further, in this case, after sending the NACK message, the user equipment 100 may receive the retransmitted DCI from the network side device.

[0096] Figure 4 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Figure 4 FIG. 1 is a schematic diagram showing that the DCI carried by the PDCCH is not correctly decoded. Figure 4 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Figure 4 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send PDCCH to the user equipment. Next, the user equipment sends a NACK message for PDCCH to the network side device. Here, the user equipment can use PUCCH to carry the NACK message for PDCCH. Next, after receiving the NACK message for PDCCH, the network side device resends PDCCH to the user equipment. Next, the user equipment decodes the resent PDCCH and uses PUCCH to send an ACK message for PDCCH to the network side device. Next, after receiving the ACK message for PDCCH, the network side device uses the PDSCH indicated in the PDCCH to send downlink data information to the user equipment.

[0097] Figure 5 It is shown Figure 4 A schematic diagram of the configuration of time slots of the illustrated embodiment. Figure 5 FIG. 1 is a schematic diagram showing the configuration of a time slot including 14 OFDM symbols. Figure 5As shown, the first OFDM symbol of the time slot is used for downlink transmission, and the network side device sends PDCCH to the user equipment; the second OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries a NACK message for PDCCH; the third OFDM symbol of the time slot is used for downlink transmission, and the network side device resends PDCCH to the user equipment; the fourth OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries an ACK message for PDCCH; the 5th to 13th OFDM symbols of the time slot are used for downlink transmission, and the network side device sends PDSCH to the user equipment; the 14th OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends a HARQ feedback message for PDSCH to the network side device. It is worth noting that Figure 5 This is just an exemplary time slot configuration. For example, Figure 5 Although the case where the PDCCH occupies one OFDM symbol is shown, of course the PDCCH may also occupy two or three OFDM symbols. In addition, the PDSCH may also occupy other numbers of OFDM symbols.

[0098] exist Figure 4 and Figure 5 In the illustrated embodiment, after one retransmission of the PDCCH, the user equipment correctly decodes the DCI carried by the PDCCH. Of course, it is also possible that the user equipment correctly decodes the DCI carried by the PDCCH after two or more retransmissions of the PDCCH. According to the embodiment of the present disclosure, each time the user equipment 100 sends a NACK message for the PDCCH to the network side device, it can receive the retransmitted PDCCH from the network side device until the user equipment 100 correctly decodes the DCI carried by the PDCCH, and then receives downlink data from the network side device. In other words, the process of PDCCH retransmission between the network side device and the user equipment 100 can be one time or multiple times.

[0099] Furthermore, according to an embodiment of the present disclosure, the number of PDCCH retransmissions can also be limited. When the number of NACK messages received from the user equipment for DCI exceeds a predetermined threshold of the number of retransmissions, the network side device may no longer retransmit the PDCCH, for example, reschedule the user equipment 100, etc.

[0100] As described above, according to the embodiments of the present disclosure, when the DCI is not correctly decoded, the user equipment 100 can generate a NACK message for the DCI, so that the network side device can resend the PDCCH to the user equipment 100 according to the NACK message until the user equipment 100 correctly decodes the DCI. After the user equipment 100 correctly decodes the DCI, the network side device can send downlink data to the user equipment 100. In addition, a threshold value for the number of PDCCH retransmissions can also be set to reduce latency.

[0101] According to an embodiment of the present disclosure, the communication unit 110 can use different frequency domain resources to simultaneously receive downlink data and retransmitted DCI from the network side device. Here, when the wireless communication system where the user equipment 100 and the network side device are located adopts the FDD (Frequency Division Duplex) mode, the same time domain resources with different frequency domain resources can be used to retransmit the PDCCH and transmit the PDSCH.

[0102] According to an embodiment of the present disclosure, after the user equipment 100 receives the retransmitted DCI from the network side device, it can decode the retransmitted DCI and send an ACK / NACK message to the network side device according to the decoding result of the DCI.

[0103] Figure 6 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Figure 6 FIG. 1 shows a schematic diagram of using different frequency domain resources to perform PDCCH retransmission and PDSCH transmission. Figure 6 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Figure 6 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send PDCCH to the user equipment. Next, the user equipment sends a NACK message for PDCCH to the network side device. Here, the user equipment can use PUCCH to carry the NACK message for PDCCH. Next, after receiving the NACK message for PDCCH, the network side device resends PDCCH to the user equipment. At the same time, the network side device uses different frequency domain resources and PDSCH to send downlink data to the user equipment. During the transmission of downlink data, the user equipment decodes the resent PDCCH and uses PUCCH to send an ACK message for PDCCH to the network side device.

[0104] According to an embodiment of the present disclosure, the user equipment 100 may receive a PDCCH retransmitted multiple times from a network side device. Further, in this case, the user equipment may not send an ACK / NACK message for the retransmitted PDCCH to the network side device.

[0105] Figure 7 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Figure 7 FIG. 1 shows a schematic diagram of using different frequency domain resources to perform multiple retransmissions of PDCCH and transmission of PDSCH. Figure 7 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Figure 7 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send PDCCH to the user equipment. Next, the user equipment sends a NACK message for PDCCH to the network side device. Here, the user equipment can use PUCCH to carry the NACK message for PDCCH. Next, after receiving the NACK message for PDCCH, the network side device resends PDCCH to the user equipment multiple times. At the same time, the network side device uses different frequency domain resources and uses PDSCH to send downlink data to the user equipment. As shown Figure 7 As shown, the network side device resends the PDCCH to the user equipment twice, and the user equipment does not perform ACK / NACK feedback for the resent PDCCH. Of course, the network side device can also resend the PDCCH to the user equipment three times or more.

[0106] As described above, the same time domain resources but different frequency domain resources can be used for retransmission of PDCCH and transmission of PDSCH, thereby reducing the delay. Further, in the case where the user equipment 100 does not correctly decode the DCI, the retransmitted PDCCH can be received from the network side device multiple times, thereby improving the reliability of the PDCCH. In this case, since the PDCCH retransmission between the network side device and the user equipment 100 is multiple times, the possibility of the PDCCH being correctly decoded by the user equipment 100 is greatly improved, so the user equipment 100 may not provide ACK / NACK feedback for the retransmitted PDCCH.

[0107] As described above, when the determination unit 130 determines that HARQ feedback for the DCI carried by the PDCCH needs to be performed, the feedback unit 140 can generate a feedback message and send the feedback message to the network side device. The feedback message here only includes an ACK / NACK message for one DCI. Another embodiment of the feedback message will be described below.

[0108] According to an embodiment of the present disclosure, the HARQ feedback message sent by the user equipment 100 to the network side device may also be a combined HARQ feedback message. For example, the combined HARQ feedback message may include a HARQ feedback message for DCI and a HARQ feedback message for downlink data carried by PDSCH. Here, the combined HARQ feedback message may include, for example, an ACK / NACK message for DCI and an ACK / NACK message for downlink data.

[0109] According to an embodiment of the present disclosure, the user equipment 100 can receive DCI carried by PDCCH and downlink data carried by PDSCH from the network side equipment, and merge the HARQ feedback message for DCI and the HARQ feedback message for downlink data, thereby saving signaling overhead and reducing latency.

[0110] Figure 8 is a schematic diagram illustrating a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure. Figure 8 The schematic diagram shows the merging of the DCI carried by the PDCCH and the feedback message of the downlink data carried by the PDSCH. Figure 8 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Figure 8 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send DCI to the user equipment through PDCCH. Next, the network side device sends downlink data to the user equipment through PDSCH. Next, the user equipment decodes the DCI and downlink data, and generates a feedback message for the DCI and a feedback message for the downlink data, and then merges the two feedback messages and sends the merged feedback message to the network side device. Here, the user equipment can use PUCCH to carry the merged feedback message.

[0111] According to an embodiment of the present disclosure, the combined HARQ feedback message may include a HARQ feedback message for the DCI and a HARQ feedback message for one or more other DCIs. Here, the combined HARQ feedback message may include an ACK / NACK message for each of the multiple DCIs.

[0112] According to an embodiment of the present disclosure, the user equipment 100 may receive multiple DCIs carried by the PDCCH from a network side device, and merge the HARQ feedback messages of the multiple DCIs, thereby saving signaling overhead and reducing latency.

[0113] Fig. 9is a schematic diagram illustrating a process of performing HARQ feedback for a PDCCH according to an embodiment of the present disclosure. Fig. 9 FIG. 4 is a schematic diagram showing a method of combining multiple DCI feedback messages carried by a PDCCH. Fig. 9 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Fig. 9 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send the first DCI ( Fig. 9 Next, the network side device selects a time-frequency resource and uses the selected time-frequency resource to send a second DCI ( Fig. 9 Next, the user equipment decodes the first DCI and the second DCI, generates a feedback message for the first DCI and a feedback message for the second DCI, and then merges the two feedback messages and sends the merged feedback message to the network side device. Here, the user equipment can use PUCCH to carry the merged feedback message. Assuming that the user equipment successfully decodes both the first DCI and the second DCI, next, the network side device sends the PDSCH indicated by the first DCI to the user equipment. Next, the network side device sends the PDSCH indicated by the second DCI to the user equipment. Fig. 9 The figure shows a situation where the user equipment 100 combines two DCI feedback messages. Of course, the user equipment 100 can also combine three or more DCI feedback messages.

[0114] Fig.10 It is shown Fig. 9 A schematic diagram of the configuration of time slots of the illustrated embodiment. Fig.10 FIG. 1 is a schematic diagram showing the configuration of a time slot including 14 OFDM symbols. Fig.10 As shown in the figure, the 1st and 2nd OFDM symbols of the time slot are used for downlink transmission, and the network side device sends multiple PDCCHs to the user equipment; the 3rd OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries HARQ feedback messages for multiple DCIs; the 4th to 10th OFDM symbols of the time slot are used for downlink transmission, and the network side device sends PDSCH to the user equipment; the 11th to 14th OFDM symbols of the time slot are used for uplink transmission, and the user equipment sends PUSCH to the network side device. It is worth noting that Fig.10 This is just an exemplary time slot configuration. For example, Fig.10Although the case where the PDCCH occupies 2 OFDM symbols is shown, of course the PDCCH may also occupy 1 or 3 OFDM symbols. In addition, the PDSCH and PUSCH may also occupy other numbers of OFDM symbols.

[0115] As described above, the feedback message sent by the user equipment 100 to the network side device may be a combined feedback message, and the combined feedback message may include a feedback message for DCI and a feedback message for downlink data, and the combined feedback message may also include feedback messages for multiple DCIs. Further, the combined feedback message may also include feedback messages for multiple DCIs and feedback messages for downlink data. In other words, the user equipment 100 may combine various HARQ feedback messages according to actual needs, thereby saving signaling overhead and reducing latency.

[0116] According to an embodiment of the present disclosure, the network side device may send downlink data through the PDSCH after the user equipment 100 correctly decodes the PDCCH, or may send downlink data through the PDSCH before the user equipment 100 correctly decodes the PDCCH. In the latter case, the user equipment 100 may cache the received downlink data, and decode the downlink data after successfully decoding the PDCCH. This caching method may be called soft caching.

[0117] like Figure 1 As shown, according to an embodiment of the present disclosure, the user equipment 100 may further include a cache unit 150, configured to cache downlink data when the PDCCH is not correctly decoded.

[0118] According to an embodiment of the present disclosure, before receiving the retransmitted DCI from the network side device, the communication unit 110 may receive downlink data from the network side device, and the cache unit 150 may cache the received downlink data. Here, the user equipment 100 may receive downlink data from the network side device via the PDSCH. In addition, after caching the received downlink data, the user equipment 100 may receive the retransmitted DCI from the network side device, and demodulate the cached downlink data using the correctly decoded DCI.

[0119] According to an embodiment of the present disclosure, after sending a NACK message for PDCCH to the network side device and before receiving retransmitted DCI from the network side device, the communication unit 110 can receive downlink data from the network side device, and the cache unit 150 can cache the received downlink data.

[0120] Fig.11 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.11The schematic diagram shows a process of receiving downlink data from a network side device and buffering the data after a NACK message for a PDCCH is sent to the network side device. Fig.11 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Fig.11 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send DCI to the user equipment through PDCCH. Next, the user equipment decodes the DCI, generates a NACK message for the DCI and sends it to the network side device. Here, the user equipment can use PUCCH to carry the NACK message. Next, the network side device sends the PDSCH indicated by the DCI to the user equipment. The user equipment caches the PDSCH. Next, the network side device resends the PDCCH to the user equipment. Next, the user equipment decodes the resent PDCCH, generates an ACK message for the PDCCH and sends it to the network side device. At the same time, the user equipment can use the correctly decoded PDCCH to demodulate the cached downlink data.

[0121] Fig.12 It is shown Fig.11 A schematic diagram of the configuration of time slots of the illustrated embodiment. Fig.12 FIG. 1 is a schematic diagram showing the configuration of a time slot including 14 OFDM symbols. Fig.12 As shown, the first OFDM symbol of the time slot is used for downlink transmission, and the network side device sends PDCCH to the user equipment; the second OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries a NACK message for DCI; the 3rd to 12th OFDM symbols of the time slot are used for downlink transmission, and the network side device sends PDSCH to the user equipment; the 13th OFDM symbol of the time slot is used for downlink transmission, and the network side device resends PDCCH to the user equipment; the 14th OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries an ACK message for the retransmitted DCI. It is worth noting that Fig.12 This is just an exemplary time slot configuration. For example, Fig.12 Although the case where the PDCCH occupies one OFDM symbol is shown, of course the PDCCH may also occupy two or three OFDM symbols. In addition, the PDSCH may also occupy other numbers of OFDM symbols.

[0122] According to an embodiment of the present disclosure, before sending a NACK message for PDCCH to the network side device and before receiving retransmitted DCI from the network side device, the communication unit 110 can receive downlink data from the network side device, and the cache unit 150 can cache the received downlink data.

[0123] Fig.13 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.13 The schematic diagram shows receiving downlink data from a network side device and buffering it before sending a NACK message for a PDCCH to the network side device. Fig.13 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Fig.13 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send DCI to the user equipment through PDCCH. Next, the network side device sends the PDSCH indicated by the DCI to the user equipment. The user equipment caches the PDSCH. Next, the user equipment decodes the DCI, generates a NACK message for the DCI and sends it to the network side device. Here, the user equipment can use PUCCH to carry the NACK message. Next, the network side device resends the PDCCH to the user equipment. Next, the user equipment decodes the resent PDCCH, generates an ACK message for the PDCCH and sends it to the network side device. At the same time, the user equipment can use the correctly decoded PDCCH to demodulate the cached downlink data.

[0124] Fig.14 It is shown Fig.13 A schematic diagram of the configuration of time slots of the illustrated embodiment. Fig.14 FIG. 1 is a schematic diagram showing the configuration of a time slot including 14 OFDM symbols. Fig.14 As shown, the first OFDM symbol of the time slot is used for downlink transmission, and the network side device sends PDCCH to the user equipment; the 2nd to 11th OFDM symbols of the time slot are used for downlink transmission, and the network side device sends PDSCH to the user equipment; the 12th OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries a NACK message for DCI; the 13th OFDM symbol of the time slot is used for downlink transmission, and the network side device resends PDCCH to the user equipment; the 14th OFDM symbol of the time slot is used for uplink transmission, and the user equipment sends PUCCH to the network side device, which carries an ACK message for the retransmitted DCI. It is worth noting that Fig.14 This is just an exemplary time slot configuration. For example, Fig.14 Although the case where the PDCCH occupies one OFDM symbol is shown, of course the PDCCH may also occupy two or three OFDM symbols. In addition, the PDSCH may also occupy other numbers of OFDM symbols.

[0125] As described above, according to an embodiment of the present disclosure, the user equipment 100 may send downlink data through the PDSCH before correctly decoding the PDCCH. In this case, since the user equipment 100 does not correctly decode the PDCCH, it does not know the position of the PDSCH indicated by the PDCCH. In the NR communication system, the user equipment 100 may be pre-configured with multiple BWPs (Bandwidth Parts) for receiving downlink data by the network side device, one of the multiple BWPs is in an activated state, and the other BWPs are in an inactive state.

[0126] According to an embodiment of the present disclosure, the user equipment 100 may receive and cache downlink data on multiple preconfigured BWPs of the user equipment 100. That is, the user equipment 100 may search and receive downlink data on all (eg, 4) preconfigured BWPs, thereby caching the downlink data.

[0127] According to an embodiment of the present disclosure, the user equipment 100 may receive and cache downlink data on one or more default BWPs of the user equipment 100. Here, the default BWP may be an activated BWP. That is, the user equipment 100 may search for and receive downlink data on an activated BWP, thereby caching the downlink data. The default BWP may also be a BWP pre-agreed between the user equipment 100 and the network side device, such as the BWP used by the user equipment 100 to receive downlink data the last time. That is, the user equipment 100 may search for and receive downlink data on a BWP pre-agreed with the network side device, thereby caching the downlink data.

[0128] According to an embodiment of the present disclosure, the user equipment 100 may also receive information about a default BWP from a network side device. For example, the information may include identification information of the default BWP. Further, such information may be received, for example, via high-layer signaling such as RRC layer signaling or MAC layer signaling. That is, the user equipment 100 may search for and receive downlink data on the BWP indicated by the network side device, thereby caching the downlink data.

[0129] According to an embodiment of the present disclosure, the communication unit 110 may also receive an indication message from a network side device for indicating that downlink data is to be cached. Here, the indication message for indicating that downlink data is to be cached may include, for example, indication information of time domain resources and frequency domain resources for carrying downlink data. For example, such indication information may be carried by a more compact or compressed DCI format. In this way, the user equipment 100 may obtain the resource location of the downlink data through the indication message, so that the downlink data may be received and cached. Further, after the user equipment 100 receives the subsequent complete DCI information, the cached downlink data may be demodulated using the completed DCI.

[0130] Fig.15 is a schematic diagram showing a process of performing HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.15 A schematic diagram showing a network side device sending cache indication information to a user device is shown. Fig.15 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Fig.15 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send the first DCI to the user equipment through the PDCCH (in Fig.15 In addition, the network side device can also select a time-frequency resource and use the selected time-frequency resource to send a second DCI to the user equipment through the PDCCH (in Fig.15 Here, the second DCI carries cache indication information for instructing the user equipment to cache downlink data. Next, the network side device sends PDSCH to the user equipment. The user equipment caches the PDSCH according to the location information of the resources for sending downlink data carried in the second DCI. Next, the user equipment decodes the first DCI, generates a NACK message for the first DCI and sends it to the network side device. Here, the user equipment can use PUCCH to carry the NACK message. Next, the network side device resends PDCCH1 to the user equipment. Next, the user equipment decodes the resent PDCCH1, generates an ACK message for PDCCHI and sends it to the network side device. At the same time, the user equipment can use the correctly decoded PDCCHI to demodulate the cached downlink data.

[0131] As described above, according to the embodiments of the present disclosure, the network side device may send an indication message for instructing to cache downlink data to the user equipment 100, or may not send an indication message for instructing to cache downlink data to the user equipment 100. In the latter case, the user equipment 100 may receive downlink data on a BWP pre-agreed with the network side device or indicated by the network side device.

[0132] It can be seen that according to the user equipment 100 of the embodiment of the present disclosure, it is possible to determine whether to perform HARQ feedback for the DCI based on the content of the DCI carried by the PDCCH. Further, the user equipment 100 can perform HARQ feedback only when the DCI includes control information related to downlink transmission, thereby saving overhead on the basis of improving transmission reliability. In addition, in order to further save overhead and reduce latency, the user equipment 100 can combine and send multiple HARQ feedback messages. Further, the user equipment 100 can also cache downlink data before correctly decoding the PDCCH. In summary, according to the user equipment 100 of the embodiment of the present disclosure, it is possible to implement the application of the HARQ feedback mechanism on the PDCCH and improve the transmission reliability of the DCI carried by the PDCCH.

[0133] <3. Configuration example of user equipment with backup PDCCH>

[0134] The following is a detailed description of a user equipment 100 for improving PDCCH transmission reliability according to another embodiment of the present disclosure. The user equipment 100 may also adopt Figure 1 The structural configuration shown.

[0135] According to an embodiment of the present disclosure, the communication unit 110 can receive first data information, second data information, first control information for the first data information, and second control information for the second data information from a network side device, wherein the first data information includes the second control information, and the second data information includes the first control information.

[0136] According to an embodiment of the present disclosure, the demodulation unit 120 may decode information received from the network side device, including the first data information, the second data information, the first control information, and the second control information, to obtain the first data information and the second data information.

[0137] As described above, according to the user equipment 100 of the embodiment of the present disclosure, the first control information and the second control information are received twice, thereby achieving diversity gain and further improving the transmission reliability of the PDCCH.

[0138] According to an embodiment of the present disclosure, the first data information and the second data information may be downlink data information carried by the PDSCH, and the first control information and the second control information may be downlink control information carried by the PDCCH.

[0139] Fig.16 is a schematic diagram showing the process of backing up PDCCH according to an embodiment of the present disclosure. Fig.16 In the figure, the horizontal direction represents the time domain and the vertical direction represents the frequency domain. Fig.16 As shown, first, the network side device selects time-frequency resources (occupying one or more OFDM symbols in the time domain and one or more subcarriers in the frequency domain) and uses the selected time-frequency resources to send the first DCI to the user equipment through the PDCCH (in Fig.16 In addition, the network side device can also select a time-frequency resource and use the selected time-frequency resource to send a second DCI to the user equipment through the PDCCH (in Fig.16 Next, the network side device sends the first data information to the user equipment via PDSCH (in Fig.16 The first data information here includes the second DCI. Further, the network side device can also send the second data information to the user equipment through PDSCH (in Fig.16 Marked as PDSCH2), the second data information here includes the first DCI.

[0140] According to an embodiment of the present disclosure, the user equipment 100 may receive the first data information, the first control information, the second data information, and the second control information from the same network side device that provides services for the user equipment 100. That is, the first control information and the second control information are different downlink control information from the same network side device, and the first data information and the second data information are different downlink data information from the same network side device. The network side device here may be, for example, a base station or a TRP.

[0141] According to an embodiment of the present disclosure, the user equipment 100 may also receive the above information from different network side devices that provide services for the user equipment 100. For example, the user equipment 100 receives the first control information and the first data information from the first network side device, and receives the second control information and the second data information from the second network side device. That is, the first control information is the downlink control information from the first network side device, the first data information is the downlink data information from the first network side device, and the second control information is the downlink control information from the second network side device, and the second data information is the downlink data information from the second network side device. The first and second network side devices here may be, for example, TRPs.

[0142] According to an embodiment of the present disclosure, the first network side device and the second network side device may exchange control information through an Xn interface (interface between TRPs). For example, the first network side device sends first control information to the second network side device through the Xn interface, so that the second network side device encodes the first control information in the second data information, and the second network side device may send second control information to the first network side device through the Xn interface, so that the first network side device encodes the second control information in the first data information.

[0143] According to an embodiment of the present disclosure, the demodulation unit 120 can decode the first control information and use the correctly decoded first control information to decode the first data information. Further, the decoding unit 120 can also decode the second control information and use the correctly decoded second control information to decode the second data information.

[0144] According to an embodiment of the present disclosure, when the demodulation unit 120 does not correctly decode the first control information but only correctly decodes the second control information, the demodulation unit 120 can use the correctly decoded second control information to decode the second data information, thereby determining the first control information included in the second data information according to the decoded second data information. Next, the demodulation unit 120 can use the obtained first control information to decode the first data information.

[0145] According to an embodiment of the present disclosure, when the demodulation unit 120 does not correctly decode the second control information but only correctly decodes the first control information, the demodulation unit 120 can use the correctly decoded first control information to decode the first data information, thereby determining the second control information included in the first data information according to the decoded first data information. Next, the demodulation unit 120 can use the obtained second control information to decode the second data information.

[0146] by Fig.16Taking the illustrated embodiment as an example, after the user equipment 100 receives PDCCH1 and PDCCH2, it decodes PDCCH1 and PDCCH2. In the case that the user equipment 100 correctly decodes both PDCCH1 and PDCCH2, the user equipment 100 can use the correctly decoded PDCCH1 to decode PDSCH1 to obtain the downlink data carried in PDSCH1, and use the correctly decoded PDCCH2 to decode PDSCH2 to obtain the downlink data carried in PDSCH2. In the case that the user equipment 100 correctly decodes PDCCH1 but does not correctly decode PDCCH2, the user equipment 100 can use the correctly decoded PDCCH1 to decode PDSCH1 to obtain the downlink data carried in PDSCH1, thereby obtaining PDCCH2 included in PDSCH1, and use the PDCCH2 thus obtained to decode PDSCH2 to obtain the downlink data carried in PDSCH2. In the case where the user equipment 100 correctly decodes PDCCH2 but fails to correctly decode PDCCH1, the user equipment 100 can use the correctly decoded PDCCH2 to decode PDSCH2 to obtain the downlink data carried in PDSCH2, thereby obtaining PDCCH1 included in PDSCH2, and use the PDCCH1 thus obtained to decode PDSCH1 to obtain the downlink data carried in PDSCH1.

[0147] As described above, according to the user equipment 100 of the embodiment of the present disclosure, PDCCH1 and PDCCH2 can be received twice, thereby achieving diversity gain. In this embodiment, PDCCH1 is copied to PDSCH2 for transmission, and PDCCH2 is copied to PDSCH1 for transmission, which actually realizes the "backup" of PDCCH1 and PDCCH2. In this way, the user equipment 100 only needs to correctly decode one of PDCCH1 and PDCCH2 to obtain the downlink data carried by PDSCH1 and PDSCH2, thereby improving the reliability of PDCCH transmission.

[0148] It is worth noting that although the above text uses two DCIs carried by PDCCH as an example to illustrate an embodiment of improving the transmission reliability of PDCCH, those skilled in the art should understand that three or more DCIs and corresponding downlink data can also be used to achieve diversity gain. For example, the second control information can be included in the first data information, the third control information can be included in the second data information, and the first control information can be included in the third data information. That is, in the case where there are multiple data information and multiple control information sent to a user equipment, control information for other data information can be included in each of the multiple data information, so that each control information is sent twice, thereby achieving diversity gain of the control information.

[0149] <4. Example of Configuration of a Network-side Device for Performing HARQ Feedback for PDCCH>

[0150] Fig.17 1 is a block diagram showing the structure of an electronic device 1700 used as a network side device in a wireless communication system according to an embodiment of the present disclosure. Fig.17 As shown, the electronic device 1700 may include a communication unit 1710 and a determination unit 1720 .

[0151] Here, each unit of the electronic device 1700 may be included in a processing circuit. It should be noted that the electronic device 1700 may include one processing circuit or multiple processing circuits. Further, the processing circuit may include various discrete functional units to perform various functions and / or operations. It should be noted that these functional units may be physical entities or logical entities, and units with different names may be implemented by the same physical entity.

[0152] According to an embodiment of the present disclosure, the communication unit 1710 may send a downlink signal including a PDCCH to the user equipment. Here, the PDCCH may carry a DCI.

[0153] According to an embodiment of the present disclosure, the determining unit 1720 may determine whether it is necessary to receive a HARQ feedback message for the DCI from the user equipment according to the content of the DCI carried by the PDCCH.

[0154] As described above, according to the electronic device 1700 of an embodiment of the present disclosure, it can determine whether it is necessary to receive HARQ feedback for the DCI from the user equipment based on the content of the DCI carried by the PDCCH, thereby realizing the application of the HARQ feedback mechanism on the PDCCH and improving the transmission reliability of the DCI carried by the PDCCH.

[0155] According to the embodiments of the present disclosure, Fig.17 As shown, the electronic device 1700 may include a processing unit 1740, which is configured to generate a DCI to be sent to a user equipment using a specific DCI format, and to carry the DCI through a PDCCH.

[0156] According to an embodiment of the present disclosure, the determination unit 1720 may determine whether it is necessary to receive HARQ feedback for the DCI from the user equipment according to whether the DCI carried by the PDCCH includes control information related to uplink transmission or control information related to downlink transmission.

[0157] According to an embodiment of the present disclosure, when the DCI includes control information related to the downlink transmission of the electronic device 1700, the determination unit 1720 determines that it is necessary to receive HARQ feedback for the DCI from the user equipment. Further, when the DCI includes control information related to the downlink transmission of the electronic device 1700, the DCI may adopt DCI format 1.

[0158] According to an embodiment of the present disclosure, when the DCI includes control information related to the uplink transmission of the electronic device 1700, the determination unit 1720 determines that it is not necessary to receive HARQ feedback for the DCI from the user equipment. Further, when the DCI includes control information related to the uplink transmission of the electronic device 1700, the DCI may adopt DCI format 0.

[0159] According to an embodiment of the present disclosure, when the determination unit 1720 determines that it is necessary to receive HARQ feedback for the DCI from the user equipment, it is necessary to wait for the HARQ feedback message for the DCI after sending the DCI, and determine whether it is necessary to retransmit the DCI based on the HARQ feedback message; when the determination unit 1720 determines that it is not necessary to receive HARQ feedback for the DCI from the user equipment, it is not necessary to wait for the HARQ feedback message for the DCI after sending the DCI, but directly perform subsequent operations, such as receiving uplink data sent by the user equipment through PUSCH or sending downlink data to the user equipment through PDSCH.

[0160] According to the embodiments of the present disclosure, Fig.17 As shown, the electronic device 1700 may include a demodulation unit 1730, which is used to demodulate the HARQ feedback message when it is necessary to receive the HARQ feedback message from the user equipment. In addition, the demodulation unit 1730 may also demodulate the uplink data from the user equipment.

[0161] According to an embodiment of the present disclosure, in case of receiving an ACK message for DCI from the user equipment, the communication unit 1710 may send downlink data to the user equipment.

[0162] Fig.18 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.18 FIG. 4 shows a signaling flow chart in the case where the user equipment decodes the DCI correctly, which corresponds to Figure 2 The process shown in . Fig.18As shown, in S1801, the base station sends a PDCCH to a UE (User Equipment), and the PDCCH carries the DCI for the UE. Next, in S1802, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE correctly decodes the DCI carried by the PDCCH, and an ACK message for the DCI is generated. Next, in S1803, the UE sends a PUCCH to the base station, which carries an ACK message for the DCI. Next, in S1804, the base station sends downlink data to the UE via the PDSCH. Next, in S1805, the UE sends a PUCCH to the base station, which carries an ACK / NACK message for the downlink data.

[0163] According to an embodiment of the present disclosure, in the case of receiving a NACK message for DCI from the user equipment, the communication unit 1710 may resend the DCI to the user equipment. Further, the electronic device 1700 may also receive an ACK / NACK message for the resent DCI from the user equipment.

[0164] Fig.19 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.19 FIG. 4 shows a signaling flow chart in the case where the user equipment does not decode the DCI correctly, which corresponds to Figure 4 The process shown in . Fig.19 As shown, in S1901, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE. Next, in S1902, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE does not correctly decode the DCI carried by the PDCCH, and a NACK message for the DCI is generated. Next, in S1903, the UE sends a PUCCH to the base station, which carries a NACK message for the DCI. Next, in S1904, the base station resends the DCI to the UE via the PDCCH. Next, in S1905, the UE decodes the resent DCI. It is assumed here that the UE correctly decodes the resent DCI, and an ACK message for the resent DCI is generated. Next, in S1906, the UE sends a PUCCH to the base station, which carries an ACK message for the resent DCI. Next, in S1907, the base station sends downlink data to the UE via the PDSCH. Next, in S1908, the UE sends a PUCCH to the base station, which carries an ACK / NACK message for downlink data. As described above, Fig.19Step S1904 and step S1905 shown in can be repeated multiple times until the UE correctly decodes the retransmitted DCI. In addition, the number of times the DCI is retransmitted can be limited to reduce the delay.

[0165] According to an embodiment of the present disclosure, the communication unit 1710 may use different frequency domain resources to simultaneously send downlink data and retransmitted DCI to the user equipment.

[0166] Fig. 20 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig. 20 The signaling flow chart of the electronic device using different frequency domain resources to simultaneously send downlink data and retransmitted DCI corresponds to Figure 6 The process shown in . Fig. 20 As shown, in S2001, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE. Next, in S2002, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE does not correctly decode the DCI carried by the PDCCH, and a NACK message for the DCI is generated. Next, in S2003, the UE sends a PUCCH to the base station, which carries a NACK message for the DCI. Next, in S2004, the base station resends the DCI to the UE via the PDCCH. Here, in S2004, the base station can also use the same time domain resources and different frequency domain resources to send downlink data to the UE via the PDSCH. Next, in S2005, the UE decodes the resent DCI. It is assumed here that the UE correctly decodes the resent DCI, and an ACK message for the resent DCI is generated. Next, in S2006, the UE sends a PUCCH to the base station, which carries an ACK message for the resent DCI.

[0167] According to an embodiment of the present disclosure, the communication unit 1710 may resend the DCI to the user equipment one or more times.

[0168] Fig.21 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.21 A signaling flow chart is shown in which an electronic device retransmits DCI multiple times, which corresponds to Figure 7 The process shown in . Fig.21As shown, in S2101, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE. Next, in S2102, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE does not correctly decode the DCI carried by the PDCCH, and a NACK message for the DCI is generated. Next, in S2103, the UE sends a PUCCH to the base station, which carries a NACK message for the DCI. Next, in S2104, the base station resends the DCI to the UE multiple times via the PDCCH. Here, in S2104, the base station can also use the same time domain resources but different frequency domain resources to send downlink data to the UE via the PDSCH. As shown Fig.21 As shown, in the case where the electronic device 1700 retransmits the DCI multiple times, it may not be necessary to receive a HARQ feedback message for the retransmitted DCI from the user equipment.

[0169] According to an embodiment of the present disclosure, the communication unit 1710 may send a DCI carried by a PDCCH to a user equipment, and send downlink data carried by a PDSCH to the user equipment. Further, when the content of the DCI indicates that a HARQ feedback message needs to be received from the user equipment, the communication unit 1710 may receive a combined HARQ feedback message from the user equipment, and the HARQ feedback message includes a HARQ feedback message for the DCI and a HARQ feedback message for the downlink data.

[0170] According to an embodiment of the present disclosure, when the combined HARQ feedback message indicates that the user equipment correctly decodes the DCI but fails to correctly decode the downlink data, the communication unit 1710 may resend the downlink data to the user equipment.

[0171] According to an embodiment of the present disclosure, in the case where the user equipment combines the feedback information for the PDCCH and the PDSCH, when the user equipment correctly decodes the PDCCH but does not correctly decode the PDSCH, the electronic device 1700 may only resend the PDSCH to the user equipment, so that the user equipment decodes the resent PDSCH using the previously correctly decoded PDCCH to obtain downlink data.

[0172] According to an embodiment of the present disclosure, when the combined HARQ feedback message indicates that the user equipment has not correctly decoded the DCI and has not correctly decoded the downlink data, the communication unit 1710 may resend the DCI to the user equipment.

[0173] According to an embodiment of the present disclosure, when the user equipment combines the feedback information for the PDCCH and the PDSCH, when the user equipment does not correctly decode the PDCCH, it must not correctly decode the PDSCH. In this case, the electronic device 1700 can only resend the PDCCH to the user equipment. So that the user equipment uses the resent PDCCH to decode the previously cached PDSCH to obtain downlink data. As a result, since only the PDCCH with a small amount of data needs to be resent, overhead can be saved and latency can be reduced.

[0174] Fig. 22 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig. 22 FIG. 4 shows a signaling flow chart in which the user equipment combines the feedback messages of PDCCH and PDSCH, corresponding to FIG. Figure 8 The process shown in . Fig. 22 As shown, in step S2201, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE. Next, in step S2202, the base station sends downlink data to the UE via the PDSCH. Next, in step S2203, the UE decodes the received DCI carried by the PDCCH, and decodes the downlink data carried by the PDSCH. Next, in step S2204, the UE sends a PUCCH to the base station, which carries an ACK / NACK message for the DCI and an ACK / NACK message for the downlink data.

[0175] According to an embodiment of the present disclosure, the communication unit 1710 may also send multiple DCIs carried by the PDCCH to the user equipment. Further, the communication unit 1710 may also receive a combined HARQ feedback message from the user equipment, the combined HARQ feedback message including a HARQ feedback message for each of the multiple DCIs.

[0176] Fig.23 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.23 FIG. 4 shows a signaling flow chart in which a user equipment combines multiple DCI feedback messages, corresponding to FIG. Fig. 9 The process shown in . Fig.23As shown, in S2301, the base station sends PDCCH1 to the UE, and PDCCH1 carries the first DCI for the UE. Next, in step S2302, PDCCH2 is sent to the UE, and PDCCH2 carries the second DCI for the UE. Next, in S2303, the UE decodes the received first DCI carried by PDCCH1 and the second DCI carried by PDCCH2. Next, in S2304, the UE sends PUCCH to the base station, which carries an ACK / NACK message for the first DCI and an ACK / NACK message for the second DCI.

[0177] According to an embodiment of the present disclosure, before resending the DCI to the user equipment, the communication unit 1710 may send downlink data to the user equipment for buffering by the user equipment.

[0178] Fig.24 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.24 FIG. 4 shows a signaling flow chart in which downlink data is first sent to the user equipment and then the DCI is resent to the user equipment, which corresponds to Fig.11 The process shown in . Fig.24 As shown, in S2401, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE. Next, in S2402, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE does not correctly decode the DCI carried by the PDCCH, and a NACK message for the DCI is generated. Next, in S2403, the UE sends a PUCCH to the base station, which carries a NACK message for the DCI. Next, in S2404, the base station sends downlink data to the UE through the PDSCH, and the UE caches the received downlink data. Next, in S2405, the base station resends the DCI to the UE through the PDCCH. Next, in S2406, the UE decodes the resent DCI. Here, it is assumed that the UE correctly decodes the resent DCI, so that the cached downlink data can be decoded using the correctly decoded DCI. Next, in S2407, the UE sends a PUCCH to the base station, which carries an ACK message for the resent DCI.

[0179] Fig.25 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.25 FIG. 4 shows a signaling flow chart in which downlink data is first sent to the user equipment and then the DCI is resent to the user equipment, which corresponds to Fig.13 The process shown in . Fig.25As shown, in S2501, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE. Next, in S2502, the base station sends downlink data to the UE through the PDSCH, and the UE caches the received downlink data. Next, in S2503, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE does not correctly decode the DCI carried by the PDCCH, and a NACK message for the DCI is generated. Next, in S2504, the UE sends a PUCCH to the base station, which carries a NACK message for the DCI. Next, in S2505, the base station resends the DCI to the UE through the PDCCH. Next, in S2506, the UE decodes the resent DCI. Here, it is assumed that the UE correctly decodes the resent DCI, so that the cached downlink data can be decoded using the correctly decoded DCI. Next, in S2507, the UE sends a PUCCH to the base station, which carries an ACK message for the resent DCI. Fig.25 In the embodiment, S2502 and S2503 may be performed simultaneously, that is, the base station sends the PDSCH to the UE in S2502, and the UE decodes the DCI in S2503.

[0180] According to an embodiment of the present disclosure, the communication unit 1710 may also send information about the default BWP to the user equipment, so that the user equipment searches for and receives downlink data on the default BWP indicated by the electronic device 1700, thereby caching the downlink data. For example, the information may include identification information of the default BWP. Further, the electronic device 1700 may send information about the default BWP, for example, through high-layer signaling such as RRC layer signaling or MAC layer signaling.

[0181] According to an embodiment of the present disclosure, the communication unit 1710 may also send an indication message to the user equipment for indicating that downlink data is to be cached. Here, the indication message for indicating that downlink data is to be cached may include, for example, indication information of time domain resources and frequency domain resources for carrying downlink data. For example, the electronic device 1700 may carry such indication information through a more compact or compressed DCI format. The user equipment may obtain the resource location of the downlink data through the indication message, so that the downlink data may be received and cached. Further, after the user equipment receives the subsequent complete DCI information from the electronic device 1700, the cached downlink data may be demodulated.

[0182] Fig.26 1 is a signaling flow chart showing the execution of HARQ feedback for PDCCH according to an embodiment of the present disclosure. Specifically, Fig.26The signaling flow chart of the electronic device sending cache indication information to the network side device is shown, which corresponds to Fig.15 The process shown in . Fig.26 As shown, in S2601, the base station sends a PDCCH to the UE, and the PDCCH carries the DCI for the UE and cache indication information. Next, in S2602, the base station sends downlink data to the UE through the PDSCH, and the UE caches the received downlink data. Next, in S2603, the UE decodes the received DCI carried by the PDCCH. It is assumed here that the UE does not correctly decode the DCI carried by the PDCCH, and a NACK message for the DCI is generated. Next, in S2604, the UE sends a PUCCH to the base station, which carries a NACK message for the DCI. Next, in S2605, the base station resends the DCI to the UE through the PDCCH. Next, in S2606, the UE decodes the resent DCI. Here, it is assumed that the UE correctly decodes the resent DCI, so that the cached downlink data can be decoded using the correctly decoded DCI. Next, in S2607, the UE sends a PUCCH to the base station, which carries an ACK message for the resent DCI. Fig.26 In the embodiment, S2602 and S2603 may be performed simultaneously, that is, the base station sends the PDSCH to the UE in S2602, and the UE decodes the DCI in S2603.

[0183] As described above, according to the electronic device 1700 of the embodiment of the present disclosure, it can be determined whether it is necessary to receive HARQ feedback for the DCI from the user equipment according to the content of the DCI carried by the PDCCH. Further, HARQ feedback can be received from the user equipment only when the DCI includes control information related to downlink transmission, thereby saving overhead on the basis of improving transmission reliability. In addition, in order to further save overhead and reduce latency, a merged HARQ feedback message can be received from the user equipment. Further, the electronic device 1700 can also send downlink data to the user equipment for caching by the user equipment before the user equipment has correctly decoded the PDCCH. In summary, according to the electronic device 1700 of the embodiment of the present disclosure, the application of the HARQ feedback mechanism on the PDCCH can be implemented to improve the transmission reliability of the DCI carried by the PDCCH.

[0184] According to an embodiment of the present disclosure, the electronic device 1700 can be used as a network-side device, that is, the electronic device 1700 can provide services for the user device 100, so all the embodiments described above regarding the user device 100 are applicable hereto.

[0185] <5. Configuration example of network-side equipment for backing up PDCCH>

[0186] The following will describe in detail an electronic device 1700 used as a network side device for improving PDCCH transmission reliability according to another embodiment of the present disclosure. The electronic device 1700 may also be used as follows Fig.17 The structural configuration shown.

[0187] According to an embodiment of the present disclosure, the processing unit 1740 can generate first data information, second data information, first control information for the first data information, and second control information for the second data information, wherein the first data information includes the second control information, and the second data information includes the first control information.

[0188] According to an embodiment of the present disclosure, the communication unit 1710 may send first data information, second data information, first control information, and second control information to the user equipment.

[0189] As described above, according to the electronic device 1700 of the embodiment of the present disclosure, the first control information and the second control information are sent to the user equipment twice, thereby achieving diversity gain and further improving the transmission reliability of the PDCCH.

[0190] According to an embodiment of the present disclosure, the communication unit 1710 may also receive second control information for the second data information from other network-side devices other than the electronic device 1700 .

[0191] According to an embodiment of the present disclosure, the processing unit 1740 may generate first data information and first control information for the first data information, where the first data information includes the second control information.

[0192] According to an embodiment of the present disclosure, the communication unit 1710 may also send the first control information to other network-side devices, so that the other network-side devices include the first control information in the second data information.

[0193] According to an embodiment of the present disclosure, the communication unit 1710 may send first data information and first control information to the user equipment. Here, the first data information is downlink data information sent by the electronic device 1700 to the user equipment, and the second data information is downlink data information sent by other network side devices to the user equipment.

[0194] Here, when the electronic device 1700 and other network side devices are TRP, the electronic device 1700 can send first control information to other network side devices through the Xn interface, and can receive second control information from other network side devices through the Xn interface.

[0195] According to an embodiment of the present disclosure, the first data information and the second data information may be downlink data information carried by the PDSCH, and the first control information and the second control information may be downlink control information carried by the PDCCH.

[0196] As described above, according to the electronic device 1700 of an embodiment of the present disclosure, the first control information is sent twice, once to other network side devices for other network side devices to send to user equipment, and once directly to the user equipment, thereby achieving diversity gain and further improving the transmission reliability of PDCCH.

[0197] Fig. 27 is a signaling flow chart showing a backup PDCCH according to an embodiment of the present disclosure. Fig. 27 Only an embodiment is shown in which the first data information and the second data information come from the same network side device. Fig. 27 In S2701, the base station sends the first DCI carried by PDCCH1 to the UE. Next, in S2702, the base station sends the second DCI carried by PDCCH2 to the UE. Next, in S2703, the base station sends downlink data to the UE through PDSCH1, including PDCCH2, and sends downlink data to the UE through PDSCH2, including PDCCH1. Next, in S2704, the UE decodes the DCI carried by PDCCH1, the DCI carried by PDCCH2, PDSCH1 and PDSCH2 to obtain the downlink data in PDSCH1 and the downlink data in PDSCH2.

[0198] As described above, according to the electronic device 1700 of the embodiment of the present disclosure, PDCCH1 and PDCCH2 can be sent twice, thereby achieving diversity gain. In this way, the user equipment only needs to correctly decode one of PDCCH1 and PDCCH2 to obtain the downlink data carried by PDSCH1 and PDSCH2, thereby improving the reliability of PDCCH transmission.

[0199] <6. Method Example>

[0200] Next, a wireless communication method performed by the user equipment 100 in the wireless communication system and by the electronic device 1700 as a network side device in the wireless communication system according to an embodiment of the present disclosure will be described in detail.

[0201] Fig.28 is a flowchart illustrating a wireless communication method performed by a user equipment 100 in a wireless communication system according to an embodiment of the present disclosure.

[0202] like Fig.28As shown, in step S2810, the downlink signal from the network side device is demodulated to obtain the PDCCH contained therein.

[0203] Next, in step S2820, it is determined whether to perform HARQ feedback for the DCI according to the content of the DCI carried by the PDCCH.

[0204] Preferably, the method further comprises: when the DCI includes control information related to downlink transmission of the user equipment 100, performing HARQ feedback for the DCI.

[0205] Preferably, when the DCI includes control information related to downlink transmission of the user equipment 100 , the DCI adopts DCI format 1.

[0206] Preferably, the method further comprises: when the DCI includes control information related to uplink transmission of the user equipment 100, not performing HARQ feedback for the DCI.

[0207] Preferably, when the DCI includes control information related to uplink transmission of the user equipment 100 , the DCI adopts DCI format 0.

[0208] Preferably, the method further comprises: when the DCI is correctly decoded, sending an ACK message for the DCI to the network side device, and receiving downlink data from the network side device according to the DCI.

[0209] Preferably, the method further comprises: in case that the DCI is not correctly decoded, sending a NACK message for the DCI to the network side device, and receiving resent DCI from the network side device.

[0210] Preferably, the method further comprises: using different frequency domain resources to simultaneously receive downlink data and resent DCI from a network side device.

[0211] Preferably, the method further comprises: before receiving the retransmitted DCI from the network side device, receiving downlink data from the network side device and buffering the data.

[0212] Preferably, the method further comprises: receiving downlink data on a plurality of pre-configured BWPs of the user equipment 100 and buffering the data.

[0213] Preferably, the method further comprises: receiving downlink data on one or more default BWPs of the user equipment 100 and buffering the data.

[0214] Preferably, the method further comprises: receiving an indication message for instructing to buffer the downlink data from the network side device.

[0215] Preferably, the method further comprises: sending a combined HARQ feedback message to the network side device, wherein the combined HARQ feedback message comprises a HARQ feedback message for the DCI and a HARQ feedback message for one or more other DCIs.

[0216] Preferably, the method further comprises: sending a combined HARQ feedback message to a network side device, wherein the combined HARQ feedback message comprises a HARQ feedback message for DCI and a HARQ feedback message for downlink data carried by PDSCH.

[0217] According to an embodiment of the present disclosure, the subject that executes the above method may be a user device 100 according to an embodiment of the present disclosure, and therefore all the embodiments regarding the user device 100 in the foregoing text are applicable hereto.

[0218] Next, a wireless communication method performed by the electronic device 1700 as a network side device in a wireless communication system according to an embodiment of the present disclosure will be described in detail.

[0219] Fig.29 1 is a flowchart illustrating a wireless communication method performed by an electronic device 1700 as a network side device in a wireless communication system according to an embodiment of the present disclosure.

[0220] like Fig.29 As shown, in step S2910, a downlink signal including a PDCCH is sent to the user equipment.

[0221] Next, in step S2920, it is determined whether to receive a HARQ feedback message for the DCI from the user equipment according to the content of the DCI carried by the PDCCH.

[0222] Preferably, the method further comprises: when the DCI includes control information related to downlink transmission of the electronic device 1700 , receiving HARQ feedback for the DCI from the user equipment.

[0223] Preferably, when the DCI includes control information related to downlink transmission of the electronic device 1700, the DCI adopts DCI format 1.

[0224] Preferably, the method further comprises: when the DCI includes control information related to uplink transmission of the electronic device 1700 , not receiving HARQ feedback for the DCI from the user equipment.

[0225] Preferably, when the DCI includes control information related to uplink transmission of the electronic device 1700, the DCI adopts DCI format 0.

[0226] Preferably, the method further comprises: in case of receiving an ACK message for the DCI from the user equipment, sending downlink data to the user equipment.

[0227] Preferably, the method further comprises: in case of receiving a NACK message for the DCI from the user equipment, resending the DCI to the user equipment.

[0228] Preferably, the method further comprises: using different frequency domain resources to simultaneously send downlink data and resent DCI to the user equipment.

[0229] Preferably, the method further comprises: resending the DCI to the user equipment one or more times.

[0230] Preferably, the method further comprises: before resending the DCI to the user equipment, sending downlink data to the user equipment.

[0231] Preferably, the method further comprises: sending an indication message for instructing to buffer the downlink data to the user equipment.

[0232] Preferably, the method further comprises: sending a plurality of DCIs to the user equipment; and receiving a combined HARQ feedback message from the user equipment, wherein the HARQ feedback message comprises a HARQ feedback message for each of the plurality of DCIs.

[0233] Preferably, the method also includes: sending DCI carried by PDCCH to the user equipment, and sending downlink data carried by PDSCH to the user equipment; and receiving a merged HARQ feedback message from the user equipment, the HARQ feedback message including a HARQ feedback message for DCI and a HARQ feedback message for downlink data.

[0234] Preferably, the method further comprises: when the combined HARQ feedback message indicates that the user equipment correctly decodes the DCI but fails to correctly decode the downlink data, resending the downlink data to the user equipment.

[0235] Preferably, the method further comprises: resending the DCI to the user equipment when the combined HARQ feedback message indicates that the user equipment has not correctly decoded the DCI and has not correctly decoded the downlink data.

[0236] According to an embodiment of the present disclosure, the subject that executes the above method may be the electronic device 1700 according to an embodiment of the present disclosure, and therefore all the embodiments of the electronic device 1700 in the foregoing text are applicable hereto.

[0237] Fig.30 is a flowchart illustrating a wireless communication method performed by a user equipment 100 in a wireless communication system according to another embodiment of the present disclosure.

[0238] like Fig.30As shown, in step S3010, first data information, second data information, first control information for the first data information, and second control information for the second data information are received from a network side device, wherein the first data information includes the second control information, and the second data information includes the first control information.

[0239] Next, in step S3020, the information received from the network side device is decoded to obtain the first data information and the second data information.

[0240] Preferably, the method further comprises: decoding the first control information, and decoding the first data information using the decoded first control information.

[0241] Preferably, the method further comprises: determining second control information according to the decoded first data information; and decoding the second data information using the determined second control information.

[0242] According to an embodiment of the present disclosure, the subject that executes the above method may be a user device 100 according to an embodiment of the present disclosure, and therefore all the embodiments regarding the user device 100 in the foregoing text are applicable hereto.

[0243] FIG31( a ) is a flowchart illustrating a wireless communication method performed by an electronic device 1700 as a network side device in a wireless communication system according to another embodiment of the present disclosure.

[0244] As shown in Figure 31(a), in step S3110, first data information, second data information, first control information for the first data information, and second control information for the second data information are sent to the user equipment, wherein the first data information includes the second control information, and the second data information includes the first control information.

[0245] According to an embodiment of the present disclosure, the subject executing the above method may be the electronic device 1700 as a network side device according to an embodiment of the present disclosure, and therefore all the embodiments of the electronic device 1700 in the foregoing text are applicable hereto.

[0246] FIG31( b ) is a flowchart illustrating a wireless communication method performed by an electronic device 1700 as a network side device in a wireless communication system according to another embodiment of the present disclosure.

[0247] As shown in Figure 31 (b), in step S3120, the second control information for the second data information is received from other network side devices other than the electronic device 1700.

[0248] Next, in step S3130, first control information for the first data information is sent to other network side devices, so that the other network side devices include the first control information in the second data information.

[0249] Next, in step S3140, first data information and first control information are sent to the user equipment, where the first data information includes second control information.

[0250] Here, the first data information is downlink data information sent by the electronic device 1700 to the user equipment, and the second data information is downlink data information sent by other network side devices to the user equipment.

[0251] According to an embodiment of the present disclosure, the subject executing the above method may be the electronic device 1700 as a network side device according to an embodiment of the present disclosure, and therefore all the embodiments of the electronic device 1700 in the foregoing text are applicable hereto.

[0252] <7. Application Examples>

[0253] The technology of the present disclosure can be applied to various products.

[0254] The network side device can be implemented as any type of TRP. The TRP can have sending and receiving functions, for example, it can receive information from the user equipment and the base station device, and can also send information to the user equipment and the base station device. In a typical example, the TRP can provide services for the user equipment and is controlled by the base station device. Furthermore, the TRP can have a structure similar to the base station device described below, or it can only have the structure related to sending and receiving information in the base station device.

[0255] The network side device can also be implemented as any type of base station device, such as macro eNB and small eNB, and can also be implemented as any type of gNB (base station in 5G system). Small eNB can be an eNB that covers a cell smaller than a macro cell, such as pico eNB, micro eNB and home (femto) eNB. Alternatively, the base station can be implemented as any other type of base station, such as NodeB and base transceiver station (BTS). The base station may include: a main body (also called a base station device) configured to control wireless communication; and one or more remote radio heads (RRHs) arranged at a place different from the main body.

[0256] The user equipment may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / dongle-type mobile router, and a digital camera) or a vehicle-mounted terminal (such as a car navigation device). The user equipment may also be implemented as a terminal that performs machine-to-machine (M2M) communication (also referred to as a machine type communication (MTC) terminal). In addition, the user equipment may be a wireless communication module (such as an integrated circuit module including a single chip) installed on each of the above-mentioned user equipments.

[0257] <Application examples for base stations>

[0258] (First application example)

[0259] Fig.32 3200 is a block diagram showing a first example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 3200 includes one or more antennas 3210 and a base station device 3220. The base station device 3220 and each antenna 3210 can be connected to each other via an RF cable.

[0260] Each of the antennas 3210 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used for the base station device 3220 to transmit and receive wireless signals. Fig.32 As shown, the eNB 3200 may include multiple antennas 3210. For example, the multiple antennas 3210 may be compatible with multiple frequency bands used by the eNB 3200. Fig.32 An example is shown in which the eNB 3200 includes a plurality of antennas 3210 , but the eNB 3200 may also include a single antenna 3210 .

[0261] The base station device 3220 includes a controller 3221 , a memory 3222 , a network interface 3223 , and a wireless communication interface 3225 .

[0262] The controller 3221 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 3220. For example, the controller 3221 generates a data packet based on the data in the signal processed by the wireless communication interface 3225, and transmits the generated packet via the network interface 3223. The controller 3221 may bundle data from a plurality of baseband processors to generate a bundled packet, and transmit the generated bundled packet. The controller 3221 may have a logical function to perform the following control: the control may be such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. The control may be performed in conjunction with a nearby eNB or core network node. The memory 3222 includes a RAM and a ROM, and stores programs executed by the controller 3221 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

[0263] The network interface 3223 is a communication interface for connecting the base station device 3220 to the core network 3224. The controller 3221 can communicate with the core network node or another eNB via the network interface 3223. In this case, the eNB 3200 and the core network node or other eNBs can be connected to each other through a logical interface (such as an S1 interface and an X2 interface). The network interface 3223 can also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 3223 is a wireless communication interface, the network interface 1823 can use a higher frequency band for wireless communication compared to the frequency band used by the wireless communication interface 3225.

[0264] The wireless communication interface 3225 supports any cellular communication scheme (such as long term evolution (LTE) and LTE-Advanced), and provides a wireless connection to a terminal located in a cell of the eNB 3200 via an antenna 3210. The wireless communication interface 3225 may generally include, for example, a baseband (BB) processor 3226 and an RF circuit 3227. The BB processor 3226 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing of layers (e.g., L1, medium access control (MAC), radio link control (RLC), and packet data convergence protocol (PDCP)). Instead of the controller 3221, the BB processor 3226 may have a part or all of the above-mentioned logical functions. The BB processor 3226 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuits. Updating the program may change the function of the BB processor 3226. The module may be a card or a blade inserted into a slot of the base station device 3220. Alternatively, the module may also be a chip mounted on a card or a blade. Meanwhile, the RF circuit 3227 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 3210 .

[0265] like Fig.32 As shown, the wireless communication interface 3225 may include multiple BB processors 3226. For example, the multiple BB processors 3226 may be compatible with multiple frequency bands used by the eNB 3200. Fig.32 As shown, the wireless communication interface 3225 may include multiple RF circuits 3227. For example, the multiple RF circuits 3227 may be compatible with multiple antenna elements. Fig.32 An example is shown in which the wireless communication interface 3225 includes a plurality of BB processors 3226 and a plurality of RF circuits 3227 , but the wireless communication interface 3225 may also include a single BB processor 3226 or a single RF circuit 3227 .

[0266] (Second application example)

[0267] Fig.33 33 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 3330 includes one or more antennas 3340, a base station device 3350, and an RRH 3360. The RRH 3360 and each antenna 3340 can be connected to each other via an RF cable. The base station device 3350 and the RRH 3360 can be connected to each other via a high-speed line such as an optical fiber cable.

[0268] Each of the antennas 3340 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 3360 to transmit and receive wireless signals. Fig.33 As shown, the eNB 3330 may include multiple antennas 3340. For example, the multiple antennas 3340 may be compatible with multiple frequency bands used by the eNB 3330. Fig.33 An example is shown in which the eNB 3330 includes multiple antennas 3340 , but the eNB 3330 may also include a single antenna 3340 .

[0269] The base station device 3350 includes a controller 3351, a memory 3352, a network interface 3353, a wireless communication interface 3355, and a connection interface 3357. The controller 3351, the memory 3352, and the network interface 3353 are similar to the reference Fig.32 The controller 3221, memory 3222 and network interface 3223 described are the same.

[0270] The wireless communication interface 3355 supports any cellular communication scheme (such as LTE and LTE-Advanced), and provides wireless communication to a terminal located in a sector corresponding to the RRH 3360 via the RRH 3360 and the antenna 3340. The wireless communication interface 3355 may generally include, for example, a BB processor 3356. In addition to the BB processor 3356 being connected to the RF circuit 3364 of the RRH 3360 via the connection interface 3357, the BB processor 3356 is connected to the reference RF circuit 3364 of the RRH 3360. Fig.32 The same as described in the BB processor 3226. Fig.33 As shown, the wireless communication interface 3355 may include multiple BB processors 3356. For example, the multiple BB processors 3356 may be compatible with multiple frequency bands used by the eNB 3330. Fig.33 An example is shown in which the wireless communication interface 3355 includes a plurality of BB processors 3356 , but the wireless communication interface 3355 may also include a single BB processor 3356 .

[0271] The connection interface 3357 is an interface for connecting the base station device 3350 (wireless communication interface 3355) to the RRH 3360. The connection interface 3357 may also be a communication module for connecting the base station device 3350 (wireless communication interface 3355) to the RRH 3360 for communication in the above-mentioned high-speed line.

[0272] The RRH 3360 includes a connection interface 3361 and a wireless communication interface 3363 .

[0273] The connection interface 3361 is an interface for connecting the RRH 3360 (wireless communication interface 3363) to the base station device 3350. The connection interface 3361 may also be a communication module for communication in the above-mentioned high-speed line.

[0274] The wireless communication interface 3363 transmits and receives wireless signals via the antenna 3340. The wireless communication interface 3363 may generally include, for example, an RF circuit 3364. The RF circuit 3364 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 3340. Fig.33 As shown, the wireless communication interface 3363 may include multiple RF circuits 3364. For example, the multiple RF circuits 3364 may support multiple antenna elements. Fig.33 An example is shown in which the wireless communication interface 3363 includes a plurality of RF circuits 3364 , but the wireless communication interface 3363 may also include a single RF circuit 3364 .

[0275] exist Fig.32 and Fig.33 In the eNB 3200 and eNB 3330 shown in FIG. Fig.17The described determination unit 1720, demodulation unit 1730 and processing unit 1740 may be implemented by the controller 3221 and / or the controller 3351. At least a portion of the functions may also be implemented by the controller 3221 and the controller 3351. For example, the controller 3221 and / or the controller 3351 may perform the functions of determining whether to receive HARQ feedback, demodulating the feedback message, and configuring the downlink control information carried by the PDCCH by executing instructions stored in the corresponding memory.

[0276] <Application examples for terminal devices>

[0277] (First application example)

[0278] Fig.34 3400 to which the technology of the present disclosure can be applied. The smart phone 3400 includes a processor 3401, a memory 3402, a storage device 3403, an external connection interface 3404, a camera 3406, a sensor 3407, a microphone 3408, an input device 3409, a display device 3410, a speaker 3411, a wireless communication interface 3412, one or more antenna switches 3415, one or more antennas 3416, a bus 3417, a battery 3418, and an auxiliary controller 3419.

[0279] The processor 3401 may be, for example, a CPU or a system on chip (SoC), and controls the functions of the application layer and other layers of the smartphone 3400. The memory 3402 includes a RAM and a ROM, and stores data and programs executed by the processor 3401. The storage device 3403 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 3404 is an interface for connecting an external device (such as a memory card and a universal serial bus (USB) device) to the smartphone 3400.

[0280] The camera device 3406 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image. The sensor 3407 may include a group of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 3408 converts the sound input to the smart phone 3400 into an audio signal. The input device 3409 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 3410, and receives an operation or information input from a user. The display device 3410 includes a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smart phone 3400. The speaker 3411 converts the audio signal output from the smart phone 3400 into sound.

[0281] The wireless communication interface 3412 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 3412 may generally include, for example, a BB processor 3413 and an RF circuit 3414. The BB processor 3413 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 3414 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 3416. The wireless communication interface 3412 may be a chip module on which the BB processor 3413 and the RF circuit 3414 are integrated. Fig.34 As shown, the wireless communication interface 3412 may include multiple BB processors 3413 and multiple RF circuits 3414. Fig.34 An example is shown in which the wireless communication interface 3412 includes a plurality of BB processors 3413 and a plurality of RF circuits 3414 , but the wireless communication interface 3412 may also include a single BB processor 3413 or a single RF circuit 3414 .

[0282] In addition, in addition to the cellular communication scheme, the wireless communication interface 3412 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes. In this case, the wireless communication interface 3412 can include a BB processor 3413 and an RF circuit 3414 for each wireless communication scheme.

[0283] Each of the antenna switches 3415 switches a connection destination of the antenna 3416 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 3412 .

[0284] Each of the antennas 3416 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 3412 to transmit and receive wireless signals. Fig.34 As shown, the smart phone 3400 may include multiple antennas 3416. Fig.34 An example is shown in which the smart phone 3400 includes a plurality of antennas 3416 , but the smart phone 3400 may also include a single antenna 3416 .

[0285] In addition, the smartphone 3400 may include an antenna 3416 for each wireless communication scheme. In this case, the antenna switch 3415 may be omitted from the configuration of the smartphone 3400.

[0286] The bus 3417 connects the processor 3401, the memory 3402, the storage device 3403, the external connection interface 3404, the camera 3406, the sensor 3407, the microphone 3408, the input device 3409, the display device 3410, the speaker 3411, the wireless communication interface 3412, and the auxiliary controller 3419 to each other. The battery 3418 is fed to the Fig.34 The various blocks of the smartphone 3400 shown are supplied with power, the feed lines being partially shown as dashed lines in the figure. The auxiliary controller 3419 operates the minimum necessary functions of the smartphone 3400, for example in a sleep mode.

[0287] exist Fig.34 In the smart phone 3400 shown, by using Figure 1 The demodulation unit 120, the determination unit 130, the feedback unit 140, and the cache unit 150 described may be implemented by the processor 3401 or the auxiliary controller 3419. At least a portion of the functions may also be implemented by the processor 3401 or the auxiliary controller 3419. For example, the processor 3401 or the auxiliary controller 3419 may perform the functions of demodulating the downlink signal, determining whether to perform HARQ feedback, performing HARQ feedback, and caching downlink data by executing instructions stored in the memory 3402 or the storage device 3403.

[0288] (Second application example)

[0289] Fig.35 35 is a block diagram showing an example of a schematic configuration of a car navigation device 3520 to which the technology of the present disclosure can be applied. The car navigation device 3520 includes a processor 3521, a memory 3522, a global positioning system (GPS) module 3524, a sensor 3525, a data interface 3526, a content player 3527, a storage medium interface 3528, an input device 3529, a display device 3530, a speaker 3531, a wireless communication interface 3533, one or more antenna switches 3536, one or more antennas 3537, and a battery 3538.

[0290] The processor 3521 may be, for example, a CPU or a SoC, and controls a navigation function and other functions of the car navigation device 3520. The memory 3522 includes a RAM and a ROM, and stores data and a program executed by the processor 3521.

[0291] The GPS module 3524 measures the position (such as latitude, longitude and altitude) of the car navigation device 3520 using GPS signals received from GPS satellites. The sensor 3525 may include a set of sensors such as a gyro sensor, a geomagnetic sensor and an air pressure sensor. The data interface 3526 is connected to, for example, the vehicle network 3541 via a terminal not shown, and acquires data (such as vehicle speed data) generated by the vehicle.

[0292] The content player 3527 reproduces content stored in a storage medium such as a CD and a DVD, which is inserted into the storage medium interface 3528. The input device 3529 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 3530, and receives an operation or information input from a user. The display device 3530 includes a screen such as an LCD or an OLED display, and displays an image of a navigation function or reproduced content. The speaker 3531 outputs a sound of a navigation function or reproduced content.

[0293] The wireless communication interface 3533 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 3533 may generally include, for example, a BB processor 3534 and an RF circuit 3535. The BB processor 3534 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 3535 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 3537. The wireless communication interface 3533 may also be a chip module on which the BB processor 3534 and the RF circuit 3535 are integrated. Fig.35 As shown, the wireless communication interface 3533 may include multiple BB processors 3534 and multiple RF circuits 3535. Fig.35 An example is shown in which the wireless communication interface 3533 includes a plurality of BB processors 3534 and a plurality of RF circuits 3535 , but the wireless communication interface 3533 may also include a single BB processor 3534 or a single RF circuit 3535 .

[0294] In addition, in addition to the cellular communication scheme, the wireless communication interface 3533 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless LAN schemes. In this case, for each wireless communication scheme, the wireless communication interface 3533 can include a BB processor 3534 and an RF circuit 3535.

[0295] Each of the antenna switches 3536 switches the connection destination of the antenna 3537 between a plurality of circuits included in the wireless communication interface 3533 , such as circuits for different wireless communication schemes.

[0296] Each of the antennas 3537 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna), and is used for the wireless communication interface 3533 to transmit and receive wireless signals. Fig.35 As shown, the car navigation device 3520 may include multiple antennas 3537. Fig.35 An example is shown in which the car navigation device 3520 includes a plurality of antennas 3537 , but the car navigation device 3520 may also include a single antenna 3537 .

[0297] In addition, the car navigation device 3520 may include an antenna 3537 for each wireless communication scheme. In this case, the antenna switch 3536 may be omitted from the configuration of the car navigation device 3520.

[0298] Battery 3538 is fed via a feeder Fig.35 The respective blocks of the illustrated car navigation device 3520 are supplied with electric power, and feed lines are partially illustrated as dotted lines in the figure. The battery 3538 accumulates electric power supplied from the vehicle.

[0299] exist Fig.35 In the car navigation device 3520 shown, by using Figure 1 The demodulation unit 120, the determination unit 130, the feedback unit 140, and the cache unit 150 described may be implemented by the processor 3521. At least a portion of the functions may also be implemented by the processor 3521. For example, the processor 3521 may perform the functions of demodulating a downlink signal, determining whether to perform HARQ feedback, performing HARQ feedback, and caching downlink data by executing instructions stored in the memory 3522.

[0300] The technology of the present disclosure may also be implemented as an in-vehicle system (or vehicle) 3540 including a car navigation device 3520, an in-vehicle network 3541, and one or more blocks in a vehicle module 3542. The vehicle module 3542 generates vehicle data (such as vehicle speed, engine speed, and fault information), and outputs the generated data to the in-vehicle network 3541.

[0301] The preferred embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is certainly not limited to the above examples. Those skilled in the art may obtain various changes and modifications within the scope of the appended claims, and it should be understood that these changes and modifications will naturally fall within the technical scope of the present disclosure.

[0302] For example, the units shown in dashed boxes in the functional block diagrams shown in the accompanying drawings all indicate that the functional units are optional in the corresponding device, and the various optional functional units can be combined in an appropriate manner to achieve the required functions.

[0303] For example, a plurality of functions included in one unit in the above embodiments may be implemented by separate devices. Alternatively, a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively. In addition, one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.

[0304] In this specification, the steps described in the flowchart include not only the processing performed in time series in the order described, but also the processing performed in parallel or individually rather than necessarily in time series. In addition, even in the steps processed in time series, it goes without saying that the order can be appropriately changed.

[0305] Although the embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings, it should be understood that the embodiments described above are only used to illustrate the present disclosure and do not constitute a limitation of the present disclosure. For those skilled in the art, various modifications and changes can be made to the above embodiments without departing from the essence and scope of the present disclosure. Therefore, the scope of the present disclosure is limited only by the attached claims and their equivalent meanings.

Claims

1. A user equipment, comprising a processing circuit, configured to: Demodulate the downlink signal from the network side device to obtain the physical downlink control channel PDCCH contained therein; and Determine whether to perform hybrid automatic repeat request HARQ feedback for the DCI according to the content of the downlink control information DCI carried by the PDCCH, in, The processing circuit is further configured to: When the DCI includes control information related to downlink transmission of the user equipment, performing HARQ feedback for the DCI, and Wherein, the processing circuit is further configured to: In the case that the DCI is not correctly decoded, a NACK message for the DCI is sent to the network side device, and a resent DCI is received from the network side device.

2. The user equipment according to claim 1, wherein: The DCI adopts DCI format 1.

3. The user equipment according to claim 1, wherein: The processing circuit is further configured to: When the DCI includes control information related to uplink transmission of the user equipment, HARQ feedback for the DCI is not performed.

4. The user equipment according to claim 3, wherein: The DCI adopts DCI format 0.

5. The user equipment according to claim 1, wherein: The processing circuit is further configured to: When the DCI is decoded correctly, an ACK message for the DCI is sent to the network side device, and downlink data is received from the network side device according to the DCI.

6. The user equipment according to claim 1, wherein: The processing circuit is further configured to: Downlink data and resent DCI are simultaneously received from the network side device using different frequency domain resources.

7. The user equipment according to claim 1, wherein: The processing circuit is further configured to: Before receiving the retransmitted DCI from the network side device, downlink data is received from the network side device and buffered.

8. The user equipment according to claim 7, wherein: The processing circuit is further configured to: Downlink data is received and buffered on a plurality of bandwidth parts BWP preconfigured on the user equipment.

9. The user equipment according to claim 7, wherein: The processing circuit is further configured to: Downlink data is received and buffered on one or more default bandwidth parts BWP of the user equipment.

10. The user equipment according to claim 7, wherein: The processing circuit is further configured to: An indication message for instructing to buffer the downlink data is received from the network side device.

11. The user equipment according to claim 1, wherein: The processing circuit is further configured to: Sending a combined HARQ feedback message to the network side device, where the combined HARQ feedback message includes a HARQ feedback message for the DCI and a HARQ feedback message for one or more other DCIs.

12. The user equipment according to claim 1, wherein: The processing circuit is further configured to: The combined HARQ feedback message is sent to the network side device, where the combined HARQ feedback message includes a HARQ feedback message for the DCI and a HARQ feedback message for downlink data carried by a physical downlink shared channel PDSCH.

13. An electronic device used as a network side device, comprising a processing circuit configured to: Sending a downlink signal including a physical downlink control channel (PDCCH) to a user equipment; and determining whether to receive a hybrid automatic repeat request HARQ feedback message for the DCI from the user equipment according to the content of the downlink control information DCI carried by the PDCCH, in, The processing circuit is further configured to: When the DCI includes control information related to downlink transmission of the electronic device, receiving HARQ feedback for the DCI from the user equipment, and Wherein, the processing circuit is further configured to: In case of receiving a NACK message for the DCI from the user equipment, resending the DCI to the user equipment.

14. The electronic device according to claim 13, wherein: The DCI adopts DCI format 1.

15. The electronic device according to claim 13, wherein: The processing circuit is further configured to: When the DCI includes control information related to uplink transmission of the electronic device, no HARQ feedback for the DCI is received from the user equipment.

16. The electronic device according to claim 15, wherein: The DCI adopts DCI format 0.

17. The electronic device according to claim 13, wherein: The processing circuit is further configured to: In case of receiving an ACK message for the DCI from the user equipment, sending downlink data to the user equipment.

18. The electronic device according to claim 13, wherein: The processing circuit is further configured to: The downlink data and the retransmitted DCI are simultaneously sent to the user equipment using different frequency domain resources.

19. The electronic device according to claim 13, wherein: The processing circuit is further configured to: The DCI is resent to the user equipment one or more times.

20. The electronic device according to claim 13, wherein: The processing circuit is further configured to: Before resending the DCI to the user equipment, downlink data is sent to the user equipment.

21. The electronic device according to claim 20, wherein: The processing circuit is further configured to: Sending an indication message to the user equipment for instructing to buffer the downlink data.

22. The electronic device according to claim 13, wherein: The processing circuit is further configured to: sending a plurality of DCIs to the user equipment; and A combined HARQ feedback message is received from the user equipment, where the HARQ feedback message includes a HARQ feedback message for each of the multiple DCIs.

23. The electronic device according to claim 13, wherein: The processing circuit is further configured to: Sending the DCI carried by the PDCCH to the user equipment, and sending downlink data carried by a physical downlink shared channel PDSCH to the user equipment; and A combined HARQ feedback message is received from the user equipment, where the HARQ feedback message includes a HARQ feedback message for the DCI and a HARQ feedback message for the downlink data.

24. The electronic device according to claim 23, wherein: The processing circuit is further configured to: When the combined HARQ feedback message indicates that the user equipment correctly decodes the DCI but fails to correctly decode the downlink data, the downlink data is resent to the user equipment.

25. The electronic device according to claim 23, wherein: The processing circuit is further configured to: When the combined HARQ feedback message indicates that the user equipment has not correctly decoded the DCI and has not correctly decoded the downlink data, the DCI is resent to the user equipment.

26. A user equipment comprising a processing circuit configured to: receiving first data information, second data information, first control information for the first data information, and second control information for the second data information from a network side device, wherein: The first data information includes the second control information, and the second data information includes the first control information; as well as decoding the information received from the network side device to obtain the first data information and the second data information, The first data information and the second data information are downlink data information carried by a physical downlink shared channel PDSCH, and the first control information and the second control information are downlink control information DCI carried by a physical downlink control channel PDCCH.

27. The user equipment according to claim 26, wherein: The processing circuit is further configured to: The first control information is decoded, and the first data information is decoded using the decoded first control information.

28. The user equipment according to claim 27, wherein: The processing circuit is further configured to: Determine the second control information according to the decoded first data information; and The second data information is decoded using the determined second control information.

29. An electronic device used as a network side device, comprising a processing circuit configured to: Sending first data information, second data information, first control information for the first data information, and second control information for the second data information to a user equipment, wherein: The first data information includes the second control information, and the second data information includes the first control information, The first data information and the second data information are downlink data information carried by a physical downlink shared channel PDSCH, and the first control information and the second control information are downlink control information DCI carried by a physical downlink control channel PDCCH.

30. An electronic device used as a network side device, comprising a processing circuit configured to: receiving second control information for second data information from other network side devices other than the electronic device; Sending first control information for the first data information to the other network side device, so that the other network side device includes the first control information in the second data information; and sending first data information and first control information to a user equipment, where the first data information includes the second control information, in, The first data information is downlink data information carried by a physical downlink shared channel PDSCH and sent by the electronic device to the user equipment, and the second data information is downlink data information carried by the PDSCH and sent by the other network side device to the user equipment, and The first control information and the second control information are downlink control information DCI carried by a physical downlink control channel PDCCH.

31. A wireless communication method performed by a user equipment, comprising: Demodulate the downlink signal from the network side device to obtain the physical downlink control channel PDCCH contained therein; as well as Determine whether to perform hybrid automatic repeat request HARQ feedback for the DCI according to the content of the downlink control information DCI carried by the PDCCH, wherein, when the DCI includes control information related to downlink transmission of the user equipment, performing HARQ feedback for the DCI, and In the case that the DCI is not correctly decoded, a NACK message for the DCI is sent to the network side device, and a resent DCI is received from the network side device.

32. A wireless communication method performed by a network side device, comprising: Sending a downlink signal including a physical downlink control channel PDCCH to a user equipment; as well as determining whether to receive a hybrid automatic repeat request HARQ feedback message for the DCI from the user equipment according to the content of the downlink control information DCI carried by the PDCCH, wherein, when the DCI includes control information related to downlink transmission of the network side device, receiving HARQ feedback for the DCI from the user equipment, and In case of receiving a NACK message for the DCI from the user equipment, resending the DCI to the user equipment.

33. A wireless communication method performed by a user equipment, comprising: receiving first data information, second data information, first control information for the first data information, and second control information for the second data information from a network side device, wherein the first data information includes the second control information, and the second data information includes the first control information; and decoding the information received from the network side device to obtain the first data information and the second data information, The first data information and the second data information are downlink data information carried by a physical downlink shared channel PDSCH, and the first control information and the second control information are downlink control information DCI carried by a physical downlink control channel PDCCH.

34. A wireless communication method performed by a network side device, comprising: sending first data information, second data information, first control information for the first data information, and second control information for the second data information to a user equipment, wherein the first data information includes the second control information, and the second data information includes the first control information, The first data information and the second data information are downlink data information carried by a physical downlink shared channel PDSCH, and the first control information and the second control information are downlink control information DCI carried by a physical downlink control channel PDCCH.

35. A wireless communication method performed by a network side device, comprising: receiving second control information for second data information from other network side devices except the network side device; Sending first control information for the first data information to the other network side device, so that the other network side device includes the first control information in the second data information; as well as sending first data information and first control information to a user equipment, where the first data information includes the second control information, The first data information is downlink data information carried by a physical downlink shared channel PDSCH and sent by the network side device to the user equipment, and the second data information is downlink data information carried by the PDSCH and sent by the other network side device to the user equipment, and The first control information and the second control information are downlink control information DCI carried by a physical downlink control channel PDCCH.

36. A computer-readable storage medium comprising executable computer instructions, which, when executed by a computer, cause the computer to perform the wireless communication method according to any one of claims 31-35.

Images