Electronic device

Abstract

The electronic equipment comprises a processing circuit which is configured to send data in a time slot before a time slot in which a group public physical downlink control channel (GC-PDCCH) needs to be sent; transmitting control information related to data in a previous time slot through the GC-PDCCH in the time slot; and transmitting information of a downlink transmission termination position for the unlicensed spectrum through a GC-PDCCH in a third time slot different from both the previous time slot and the time slot, in which the downlink transmission termination position is directly indicated in the GC-PDCCH or is determined according to time slot format information included in the GC-PDCCH, and in which the downlink transmission termination position is indicated in the GC-PDCCH or is determined according to the time slot format information included in the GC-PDCCH. The processing circuit transmits data in a time slot previous to a time slot in which the GC-PDCCH is located according to a default time slot format.

Description

[0001] This application is a divisional application of invention patent application No. 201980004825.1, whose application date is February 3, 2019, international application number is PCT / CN2019 / 074679, and which entered the Chinese national phase on April 1, 2020, and whose invention name is "Electronic device, wireless communication method and computer-readable storage medium".

[0002] This application claims priority to a Chinese patent application filed with the Chinese Patent Office on February 11, 2018, with application number 201810140933.9 and invention name “electronic device, wireless communication method and computer-readable storage medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] Embodiments of the present disclosure generally relate to the field of wireless communications, and specifically relate to electronic devices, wireless communication methods, and computer-readable storage media. More specifically, the present disclosure relates to an electronic device as a network-side device in a wireless communication system, an electronic device as a user device in a wireless communication system, a wireless communication method performed by a network-side device in a wireless communication system, a wireless communication method performed by a user device in a wireless communication system, and a computer-readable storage medium. Background Art

[0004] A new control channel GC-PDCCH (Group Common-Physical Downlink Control Channel) is introduced in the NR (New Radio) communication system, which is mainly used by the base station equipment to indicate downlink control information to a group of user equipment, such as SFI (Slot Format related Information). SFI is used to indicate the SFI format adopted by the base station in the current time slot and / or one or more subsequent time slots, that is, the ratio of the number of uplink and downlink symbols in a time slot. However, the existing standards have not reached much consensus on the configuration of GC-PDCCH.

[0005] Compared with the LTE (Long Term Evolution) communication system, the NR communication system has been greatly improved. For example, in the NR communication system, there are different subcarrier spacings and support symbol-level uplink and downlink transmission. In addition, for unlicensed spectrum, the requirement of channel idle detection poses a challenge to the design of GC-PDCCH.

[0006] Therefore, it is necessary to propose a technical solution to improve the design of GC-PDCCH according to the characteristics of the NR communication system. Summary of the invention

[0007] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0008] The purpose of the present disclosure is to provide an electronic device, a wireless communication method, and a computer-readable storage medium to better design a GC-PDCCH according to the characteristics of the NR communication system.

[0009] According to one aspect of the present disclosure, an electronic device is provided, which operates in a base station and includes a processing circuit, which: sends data in a time slot previous to a time slot in which a group common physical downlink control channel GC-PDCCH needs to be sent; sends control information related to the data in the previous time slot through the GC-PDCCH in the time slot; and sends information on a downlink transmission termination position for an unlicensed spectrum through the GC-PDCCH in a third time slot different from both the previous time slot and the time slot, wherein the downlink transmission termination position is directly indicated in the GC-PDCCH or determined according to the time slot format information included in the GC-PDCCH, and wherein the processing circuit sends the data in the previous time slot of the time slot where the GC-PDCCH is located according to a default time slot format.

[0010] According to another aspect of the present disclosure, an electronic device is provided, which operates in a mobile device and includes a processing circuit, which: receives data in a time slot previous to a time slot in which a group common physical downlink control channel GC-PDCCH needs to be received from a base station; receives control information related to the data in the previous time slot through the GC-PDCCH in the time slot; and receives information on a downlink transmission termination position for an unlicensed spectrum through the GC-PDCCH in a third time slot different from both the previous time slot and the time slot, wherein the downlink transmission termination position is directly indicated in the GC-PDCCH or determined according to the time slot format information included in the GC-PDCCH, and wherein the processing circuit receives data in the previous time slot of the time slot where the GC-PDCCH is located according to a default time slot format.

[0011] According to another aspect of the present disclosure, an electronic device is provided, comprising a processing circuit configured to transmit control information related to data in a time slot previous to a time slot where the GC-PDCCH is located through a group common physical downlink control channel GC-PDCCH.

[0012] According to another aspect of the present disclosure, an electronic device is provided, comprising a processing circuit configured to: receive information via a group common physical downlink control channel GC-PDCCH; and demodulate the information to obtain control information related to data in a time slot previous to the time slot where the GC-PDCCH is located.

[0013] According to another aspect of the present disclosure, a wireless communication method is provided, including: transmitting control information related to data in a time slot previous to a time slot where the GC-PDCCH is located through a group common physical downlink control channel GC-PDCCH.

[0014] According to another aspect of the present disclosure, a wireless communication method is provided, including: receiving information through a group common physical downlink control channel GC-PDCCH; and demodulating the information to obtain control information related to data in a time slot previous to the time slot where the GC-PDCCH is located.

[0015] 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.

[0016] By using the electronic device, wireless communication method and computer-readable storage medium according to the present disclosure, GC-PDCCH can be used to transmit control information related to the data in the previous time slot of the time slot where the GC-PDCCH is located, so that the user equipment can correctly decode the data in the previous time slot, thereby improving the utilization rate of the channel.

[0017] 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

[0018] 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:

[0019] Figure 1 is a block diagram showing an example of a configuration of an electronic device according to an embodiment of the present disclosure;

[0020] Figure 2 is a schematic diagram showing a downlink transmission termination position for unlicensed spectrum transmitted through GC-PDCCH according to an embodiment of the present disclosure;

[0021] Figure 3is a schematic diagram showing the transmission of a downlink transmission termination position for an unlicensed spectrum through a GC-PDCCH and a PDCCH (Physical Downlink Control Channel) according to an embodiment of the present disclosure;

[0022] Figure 4 is a schematic diagram showing a termination position of downlink transmission for unlicensed spectrum through GC-PDCCH transmission of multiple time slots according to an embodiment of the present disclosure;

[0023] Figure 5 is a schematic diagram showing that a downlink transmission termination position is transmitted through a GC-PDCCH of a time slot where the downlink transmission termination position is located according to an embodiment of the present disclosure;

[0024] Figure 6 is a schematic diagram showing how to determine the time slot where the GC-PDCCH for transmitting the downlink transmission termination position is located according to the length of MCOT (Max Channel Occupy Time) according to an embodiment of the present disclosure;

[0025] Figure 7 is a schematic diagram showing how to determine the time slot where the GC-PDCCH for transmitting the downlink transmission termination position is located according to the length of an OFDM (Orthogonal Frequency Division Multiplexing) symbol according to an embodiment of the present disclosure;

[0026] Figure 8 is a schematic diagram showing the relationship between MCOT and COT (Channel Occupy Time) units according to an embodiment of the present disclosure;

[0027] Fig. 9 is a schematic diagram showing transmission of control information related to data in a previous time slot through a GC-PDCCH according to an embodiment of the present disclosure;

[0028] Fig.10 is a schematic diagram showing that control information related to data in a previous time slot is transmitted in a next time slot regardless of a transmission cycle of a GC-PDCCH when control information is not transmitted in a previous time slot according to an embodiment of the present disclosure;

[0029] Fig.11 is a block diagram showing an example of a configuration of an electronic device according to another embodiment of the present disclosure;

[0030] Fig.12is a signaling interaction diagram showing transmission of a downlink transmission termination position through a GC-PDCCH according to an embodiment of the present disclosure;

[0031] Fig.13 is a signaling interaction diagram showing at least one of the transmission of the MCOT length and position, whether to perform LBT, and LBT parameters through the GC-PDCCH according to an embodiment of the present disclosure;

[0032] Fig.14 is a signaling interaction diagram showing control information related to data transmitted in a previous time slot through a GC-PDCCH according to an embodiment of the present disclosure;

[0033] Fig.15 is a signaling interaction diagram showing sending a notification to a user equipment so that the user equipment receives a GC-PDCCH in a next time slot according to an embodiment of the present disclosure;

[0034] Fig.16 is a flow chart illustrating a wireless communication method according to an embodiment of the present disclosure;

[0035] Fig.17 is a flow chart illustrating a wireless communication method according to another embodiment of the present disclosure;

[0036] Fig.18 is a flow chart illustrating a wireless communication method according to another embodiment of the present disclosure;

[0037] Fig.19 is a flow chart illustrating a wireless communication method according to another embodiment of the present disclosure;

[0038] Fig. 20 is a block diagram showing a first example of a schematic configuration of an eNB (Evolved Node B);

[0039] Fig.21 is a block diagram showing a second example of a schematic configuration of an eNB;

[0040] Fig. 22 is a block diagram showing an example of a schematic configuration of a smartphone; and

[0041] Fig.23 is a block diagram showing an example of a schematic configuration of a car navigation device.

[0042] 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

[0043] 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.

[0044] 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.

[0045] The description will be in the following order:

[0046] 1. Description of the scene;

[0047] 2. Configuration example of network side equipment;

[0048] 2.1 Downlink transmission termination position carried by GC-PDCCH

[0049] 2.2 Length and time domain position of MCOT carried by GC-PDCCH

[0050] 2.3 Whether the channel detection process needs to be performed before uplink transmission in MCOT is carried by GC-PDCCH

[0051] 2.4 Parameter information of channel detection process carried by GC-PDCCH

[0052] 2.5 GC-PDCCH carries control information related to the data in the previous time slot

[0053] 2.6 Sending GC-PDCCH in the next time slot when GC-PDCCH was not sent in the previous time slot

[0054] 2.7 Bearer at the start of downlink transmission

[0055] 3. Configuration example of user equipment;

[0056] 3.1 Receiving the downlink transmission termination position through GC-PDCCH

[0057] 3.2 Length and time domain position of MCOT received through GC-PDCCH

[0058] 3.3 Receive information via GC-PDCCH whether a channel detection process needs to be performed before uplink transmission in MCOT

[0059] 3.4 Receive channel detection process parameter information through GC-PDCCH

[0060] 3.5 Receiving control information related to the data in the previous time slot through GC-PDCCH

[0061] 3.6 Receive downlink transmission start position

[0062] 4. Method embodiments;

[0063] 5. Application examples.

[0064] <1. Description of the scene>

[0065] A new control channel GC-PDCCH is introduced in the NR communication system, which is used by the base station device to indicate downlink control information to a group of user equipment within the coverage of the base station. The present disclosure proposes an electronic device in a wireless communication system, a wireless communication method performed by an electronic device in a wireless communication system, and a computer-readable storage medium, so as to improve the design of GC-PDCCH according to the characteristics of the NR communication system.

[0066] The present disclosure can be used in wireless communication systems, such as 5G (5th generation communication system) NR communication systems.

[0067] The network side device according to the present disclosure may be a base station device, for example, an eNB or a gNB (a base station in a fifth generation communication system).

[0068] 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.

[0069] <2. Configuration example of network side equipment>

[0070] Figure 1 1 is a block diagram showing an example of a configuration of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 here can be used as a network side device in a wireless communication system, specifically, as a base station device in an NR communication system.

[0071] like Figure 1 As shown, the electronic device 100 may include a configuration unit 110 and a communication unit 120 .

[0072] Here, each unit of the electronic device 100 may be included in a processing circuit. It should be noted that the electronic device 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.

[0073] According to an embodiment of the present disclosure, the configuration unit 110 can configure the downlink information that needs to be sent, including downlink information sent through GC-PDCCH, PDCCH, ePDCCH (Enhanced Physical Downlink Control Channel) and high-level signaling, and the communication unit 120 can send the downlink information to user equipment within the coverage of the electronic device 100.

[0074] According to an embodiment of the present disclosure, the electronic device 100 can use unlicensed spectrum to send information carried on the GC-PDCCH. Further, the electronic device 100 can also use licensed spectrum, such as a primary carrier, to send information carried on the GC-PDCCH. In this way, the electronic device 100 can ensure the reliability of the information sent using the GC-PDCCH.

[0075] According to an embodiment of the present disclosure, the electronic device 100 can use GC-PDCCH to send a variety of information, which will be described in detail below. Further, according to an embodiment of the present disclosure, the electronic device 100 can use DCI (Downlink Control Information) to carry one or more of the following information (described in Sections 2.1 to 2.6), which may be but not limited to DCI format 2_x (DCI format in NR communication system, used to carry other information besides uplink scheduling and downlink scheduling).

[0076] According to an embodiment of the present disclosure, the electronic device 100 may also carry the following information (described in Section 2.7) through high-layer signaling, which may be but is not limited to RRC (Radio Resource Control) signaling.

[0077] <2.1 Termination location of downlink transmission carried by GC-PDCCH>

[0078] According to an embodiment of the present disclosure, the configuration unit 110 may configure information on the termination position of the downlink transmission for the unlicensed spectrum, and carry the information on the termination position of the downlink transmission for the unlicensed spectrum through the GC-PDCCH. Here, the electronic device 100 may determine the termination position of the downlink transmission before each downlink transmission. According to an embodiment of the present disclosure, the termination position of the downlink transmission indicates the position of the OFDM symbol at the end of this downlink transmission, including but not limited to the position of the time slot where the terminated OFDM symbol is located and the position of the OFDM symbol in the time slot.

[0079] According to an embodiment of the present disclosure, the communication unit 120 may transmit information on a downlink transmission termination position for an unlicensed spectrum through a GC-PDCCH.

[0080] Figure 2 FIG. 2 is a schematic diagram showing the termination position of downlink transmission for unlicensed spectrum transmitted through GC-PDCCH according to an embodiment of the present disclosure. Figure 2 As shown, the horizontal axis represents time and the vertical axis represents frequency. Figure 2 The case of three time slots (time slot 1, time slot 2 and time slot 3) is shown. The oblique line shaded area represents the area occupied by the PDCCH, for example, the first three OFDM symbols of each time slot. The black solid area represents the area occupied by the GC-PDCCH. Figure 2 As shown, the GC-PDCCH is located in the region of the PDCCH. That is, the GC-PDCCH is located in the OFDM symbol occupied by the PDCCH in terms of time, and is located in the subcarrier occupied by the PDCCH in terms of frequency. Figure 2 , exemplarily, the transmission period of GC-PDCCH is two time slots. Figure 2 In the example, the PDCCH area in time slot 1 and time slot 3 includes GC-PDCCH. The horizontal shaded area indicates the termination position of the downlink transmission for the unlicensed spectrum, that is, the downlink transmission for the unlicensed spectrum will terminate at the OFDM symbol where the horizontal shaded area is located. According to the embodiment of the present disclosure, GC-PDCCH can be used to transmit the information of the termination position of the downlink transmission for the unlicensed spectrum. Figure 2As shown, the GC-PDCCH in time slot 1 can be used to transmit information about the downlink transmission termination position for the unlicensed spectrum, and the information may include the position information of the OFDM symbol where the downlink transmission termination position is located.

[0081] As described above, according to an embodiment of the present disclosure, GC-PDCCH can be used to transmit information on the termination position of downlink transmission for unlicensed spectrum. In this way, compared with the public search area of ​​PDCCH for user equipment in the entire cell, GC-PDCCH targets a group of user equipment, thereby narrowing the user range to a certain extent. Compared with the private (UE-specific) search area of ​​PDCCH for a specific user equipment, GC-PDCCH targets a group of user equipment, thereby saving signaling overhead. Further, since GC-PDCCH only contains a search space of one aggregation level, using GC-PDCCH to transmit information on the termination position of downlink transmission for unlicensed spectrum can improve the speed of user blind detection. In addition, after the user equipment obtains the information on the termination position of the downlink transmission, when the user equipment reuses the unlicensed spectrum used for the downlink for uplink transmission, the downlink data can be decoded as early as possible to prepare for the detection of channel idleness, thereby improving the utilization efficiency of the unlicensed spectrum.

[0082] According to an embodiment of the present disclosure, the configuration unit 110 can configure the information sent through the PDCCH to carry the information of the downlink transmission termination position for the unlicensed spectrum through the PDCCH. For example, the configuration unit 110 can carry the information of the downlink transmission termination position for the unlicensed spectrum through the public search area or the private search area of ​​the PDCCH. Further, the communication unit 120 can retransmit the information of the downlink transmission termination position for the unlicensed spectrum through the PDCCH. Further, the configuration unit 110 can carry the information of the downlink transmission termination position for the unlicensed spectrum through the PDCCH and the GC-PDCCH in the same time slot.

[0083] Figure 3 FIG. 1 is a schematic diagram showing the termination position of downlink transmission for unlicensed spectrum transmitted through GC-PDCCH and PDCCH according to an embodiment of the present disclosure. Figure 3 In the figure, the horizontal axis represents time and the vertical axis represents frequency. Figure 3 The case of three time slots (time slot 1, time slot 2 and time slot 3) is shown. The oblique line shaded area represents the area occupied by the PDCCH, for example, the first three OFDM symbols of each time slot, and the black solid area represents the area occupied by the GC-PDCCH. In addition, exemplarily, the transmission period of the GC-PDCCH is two time slots. Figure 3As shown, not only the GC-PDCCH in time slot 1 is used to transmit the information of the downlink transmission termination position for the unlicensed spectrum, but also the PDCCH is used to transmit the information of the downlink transmission termination position for the unlicensed spectrum again. It is worth noting that Figure 3 The situation in which the information of the downlink transmission termination position is transmitted only through the PDCCH in time slot 1 is shown. The electronic device 100 can also transmit the downlink transmission termination position only through the PDCCH in time slot 2, or through the PDCCH in time slot 1 and the PDCCH in time slot 2.

[0084] As described above, according to the embodiments of the present disclosure, the information of the downlink transmission termination position for the unlicensed spectrum is transmitted through GC-PDCCH and PDCCH, so as to prevent the user equipment from not receiving the GC-PDCCH or decoding errors of the information carried on the GC-PDCCH.

[0085] According to an embodiment of the present disclosure, the configuration unit 110 may configure the information sent through the GC-PDCCH to transmit the downlink transmission termination position for the unlicensed spectrum through the GC-PDCCH of multiple time slots. That is, the downlink transmission termination position may be transmitted through the GC-PDCCH of multiple time slots before the downlink transmission termination position (including the time slot where the downlink transmission termination position is located).

[0086] Figure 4 FIG. 1 is a schematic diagram showing the termination position of downlink transmission for unlicensed spectrum through GC-PDCCH transmission of multiple time slots according to an embodiment of the present disclosure. Figure 4 In the figure, the horizontal axis represents time and the vertical axis represents frequency. Figure 4 The case of three time slots (time slot 1, time slot 2 and time slot 3) is shown. The oblique line shaded area represents the area occupied by the PDCCH, for example, the first three OFDM symbols of each time slot, and the black solid area represents the area occupied by the GC-PDCCH. In addition, illustratively, the transmission period of the GC-PDCCH is one time slot, that is, the PDCCH area of ​​time slot 1, time slot 2 and time slot 3 includes the GC-PDCCH. Figure 4 As shown, the downlink transmission termination position is located within time slot 2, and the information of the downlink transmission termination position is transmitted through the GC-PDCCH of time slot 1 and time slot 2.

[0087] As described above, according to an embodiment of the present disclosure, information on the downlink transmission termination position for unlicensed spectrum may be transmitted via the GC-PDCCH in one or more time slots, thereby increasing the probability that the user equipment can receive and correctly demodulate the downlink transmission termination position.

[0088] According to an embodiment of the present disclosure, the configuration unit 110 can configure the information sent through the GC-PDCCH to transmit the information of the downlink transmission termination position through the GC-PDCCH in the time slot where the downlink transmission termination position is located, and can also transmit the information of the downlink transmission termination position through the GC-PDCCH in the time slot before the time slot where the downlink transmission termination position is located. That is, the electronic device 100 can transmit the downlink transmission termination position through the GC-PDCCH in the Nth time slot before the downlink transmission termination position. Here, N is a non-negative integer. When N is a positive integer, it means that the electronic device 100 transmits the downlink transmission termination position through the GC-PDCCH in the time slot before the time slot where the downlink transmission termination position is located; when N=0, it means that the electronic device 100 transmits the downlink transmission termination position through the GC-PDCCH in the time slot where the downlink transmission termination position is located.

[0089] According to an embodiment of the present disclosure, since the configuration unit 110 can configure the information sent through the GC-PDCCH to transmit the downlink transmission termination position information through the GC-PDCCH in one or more time slots, there may be multiple values ​​of the aforementioned N. In other words, the electronic device 100 can transmit the downlink transmission termination position information through the GC-PDCCH in the time slot where the downlink transmission termination position is located, and can also transmit the downlink transmission termination position information through the GC-PDCCH in the time slot before the time slot where the downlink transmission termination position is located.

[0090] Figure 2 and Figure 3 An example is shown in which the information of the downlink transmission termination position is transmitted only through the GC-PDCCH in the time slot before the time slot where the downlink transmission termination position is located. Figure 2 and Figure 3 As shown, the downlink transmission termination position is located in time slot 2, and the downlink transmission termination position is transmitted through the GC-PDCCH in time slot 1. Figure 4 An example is shown in which the information of the downlink transmission termination position is transmitted through the GCPDCCH in the time slot where the downlink transmission termination position is located and the GC-PDCCH in the time slot before the time slot where the downlink transmission termination position is located. Figure 4 As shown, the downlink transmission termination position is located in time slot 2, and the downlink transmission termination position is transmitted through the GC-PDCCH in time slot 2 and the GC-PDCCH in time slot 1. Figure 5 2 is a schematic diagram showing that the downlink transmission termination position is transmitted only through the GC-PDCCH of the time slot where the downlink transmission termination position is located according to an embodiment of the present disclosure. Figure 5 As shown, the downlink transmission termination position is located in time slot 2, and the downlink transmission termination position is transmitted through the GC-PDCCH in time slot 2.

[0091] As described above, according to the embodiments of the present disclosure, the number and location (time slot) of the GC-PDCCH carrying the information of the downlink transmission termination location for the unlicensed spectrum can be flexibly configured. The following describes how to determine the time slot where the GC-PDCCH for carrying the downlink transmission termination location is located.

[0092] According to an embodiment of the present disclosure, the configuration unit 110 can determine the value of N (i.e., the time slot where the GC-PDCCH carrying the downlink transmission termination position is located) based on one or more of the following parameters: the length of the maximum channel occupancy time MCOT of the downlink transmission; the transmission period of the GC-PDCCH; and the length of the OFDM symbol within the MCOT of the downlink transmission.

[0093] According to an embodiment of the present disclosure, the configuration unit 110 may determine the time slot where the GC-PDCCH carrying the downlink transmission termination position is located according to the length of the MCOT. According to an embodiment of the present disclosure, when configuring the time slot where the GC-PDCCH carrying the downlink transmission termination position is located, the configuration unit 110 must make the time slot located within the MCOT of this downlink transmission.

[0094] Figure 6 2 is a schematic diagram showing how to determine the time slot where the GC-PDCCH for transmitting the downlink transmission termination position is located according to the length of the MCOT according to an embodiment of the present disclosure. Figure 6 As shown, the MCOT of this downlink transmission includes time slot 2, time slot 3 and time slot 4. Therefore, Figure 6 2 shows that the GC-PDCCH of time slot 2 is used to carry the downlink transmission termination position. Of course, the GC-PDCCH of time slot 3 can also be used to carry the downlink transmission termination position. In other words, the time slot of the GC-PDCCH carrying the downlink transmission termination position must be within the MCOT of this downlink transmission.

[0095] According to an embodiment of the present disclosure, the configuration unit 110 may determine the time slot where the GC-PDCCH for carrying the downlink transmission termination position is located according to the transmission period of the GC-PDCCH. According to an embodiment of the present disclosure, the electronic device 100 may periodically transmit the GC-PDCCH and may configure the period of the GC-PDCCH, which may be, for example, one or more time slots.

[0096] On the one hand, according to an embodiment of the present disclosure, the transmission period of GC-PDCCH determines in which time slots' PDCCHs GC-PDCCH is included. On the other hand, according to an embodiment of the present disclosure, time slot format information SFI can be transmitted through GC-PDCCH. For example, the GC-PDCCH in a time slot can be used to carry the SFI of the time slot or one or more time slots after the time slot. Therefore, the transmission period of GC-PDCCH can be used to determine how many time slots after the time slot the GC-PDCCH in a time slot can be used to carry the SFI. Here, only by knowing the SFI of the time slot where the downlink transmission termination position is located can the downlink transmission termination position be determined. Therefore, according to an embodiment of the present disclosure, when configuring the time slot where the GC-PDCCH carrying the downlink transmission termination position is located, the configuration unit 110 can select the following time slot: the GC-PDCCH of the time slot also carries the SFI of the time slot where the downlink transmission termination position is located.

[0097] According to an embodiment of the present disclosure, the configuration unit 110 can configure the information sent through the GC-PDCCH to transmit the time slot format information SFI of the time slot where the downlink transmission termination position is located through the GC-PDCCH. That is, the GC-PDCCH used to carry the information of the downlink transmission termination position also carries the SFI of the time slot where the downlink transmission termination position is located.

[0098] According to an embodiment of the present disclosure, the configuration unit 110 can determine the time slot where the GC-PDCCH for carrying the downlink transmission termination position is located according to the length of the OFDM symbol in the MCOT of the downlink transmission. In the NR communication system, the length of the OFDM symbol in time is different for different subcarrier spacings. Table 1 shows the relationship between the subcarrier spacing and the OFDM symbol length.

[0099] Table 1

[0100]

[0101] It can be seen that the larger the subcarrier spacing, the shorter the length of the OFDM symbol in time. In addition, since a time slot includes 14 OFDM symbols in the NR communication system, the larger the subcarrier spacing, the shorter the absolute length of a time slot will be. Table 1 only shows the cases where the subcarrier spacing is 15kHZ, 30kHZ, 60kHZ and 120kHZ. In the NR system, the subcarrier spacing can also be 240kHZ and 480kHZ. Therefore, when the subcarrier spacing is relatively large, the absolute length of a time slot is very short. If the value of N is small, for example, N = 0 or 1, then the time when the user equipment obtains the downlink transmission termination position is very close to the downlink transmission termination position, so that the user equipment does not have sufficient time to prepare uplink feedback or uplink transmission.

[0102] Therefore, according to the embodiment of the present disclosure, the configuration unit 110 can determine the time slot where the GC-PDCCH for carrying the downlink transmission termination position is located according to the length of the OFDM symbol in the MCOT of the downlink transmission, so that the shorter the length of the OFDM symbol, the larger the value of N. In this way, for different subcarrier configurations, that is, different OFDM symbol lengths, the advance amount of sending the downlink transmission termination position, that is, the absolute advance time, is made consistent as much as possible, ensuring that the user equipment has sufficient time to prepare for uplink feedback or uplink transmission.

[0103] Figure 7 It is a schematic diagram showing how to determine the time slot where the GC-PDCCH for transmitting the downlink transmission termination position is located according to the length of the OFDM symbol according to an embodiment of the present disclosure. Figure 7 The case where the subcarrier spacing is 15 kHz and 30 kHz is shown. Figure 7 As shown in the figure, when the subcarrier spacing is 15kHZ, the GC-PDCCH in time slot 2 is used to send the information of the downlink transmission termination position. The downlink transmission termination position is located in time slot 3, that is, N=1. When the subcarrier spacing is 30kHZ, the GC-PDCCH in time slot 3 is used to send the information of the downlink transmission termination position. The downlink transmission termination position is located in time slot 6, that is, N=3. It can be seen that compared with the case where the subcarrier spacing is 15kHZ, the N value of the subcarrier spacing of 30kHZ is larger, but the absolute advance time of the two is similar.

[0104] According to the embodiment of the present disclosure, since the configuration unit 110 can configure the GC-PDCCH in one or more time slots to send the information of the downlink transmission termination position, the value of N determined as described above may also exist in one or more. Figure 7 In the example shown, when the subcarrier spacing is 15kHZ, assuming that the GC-PDCCH transmission period is one time slot, the GC-PDCCH in time slot 3 can also be used to send information about the downlink transmission termination position, and N=0 at this time; when the subcarrier spacing is 30kHZ, assuming that the GC-PDCCH transmission period is two time slots, the GC-PDCCH in time slot 5 can also be used to send information about the downlink transmission termination position, and N=1 at this time.

[0105] According to an embodiment of the present disclosure, the configuration unit 110 may separately consider the following parameters to determine the value of N: the length of the MCOT for downlink transmission; the transmission period of the GC-PDCCH; and the length of the OFDM symbol within the MCOT for downlink transmission. Further, the configuration unit 110 may also comprehensively consider multiple of the above parameters to determine the value of N. Several non-limiting examples are given below.

[0106] For example, the configuration unit 110 may determine the following time slots as time slots that carry information about the downlink transmission termination position: the SFI of the time slot that is located within the MCOT of the downlink transmission and carries the downlink transmission termination position.

[0107] For another example, the configuration unit 110 may further select a time slot that is located in the MCOT of the downlink transmission and carries the SFI of the time slot where the downlink transmission termination position is located, so as to determine the value of N according to the length of the OFDM symbol. n kHZ configuration (n = 0, 1, 2, 3, 4, 5), before the end of the downlink transmission (2 n+1 -1) time slot is located in the MCOT of the downlink transmission and carries the SFI of the time slot where the downlink transmission termination position is located, the configuration unit 110 can determine that a value of N is 2 n+1 -1. In this case, the value of N determined may be the minimum value among all the values ​​of N. n+1 -1) time slot is not located in the MCOT of the downlink transmission or does not carry the SFI of the time slot where the downlink transmission termination position is located, the configuration unit may determine the following time slot as the time slot that carries the information of the downlink transmission termination position: the time slot that is located in the MCOT of the downlink transmission and carries the SFI of the time slot where the downlink transmission termination position is located, and is the time slot farthest from the downlink transmission termination position. In this case, the value of N determined may be the maximum value among all values ​​of N. For example, in Figure 7 In the example shown, for the case where the subcarrier spacing is 15 kHz, n=0, the (2 n+1 -1) time slot is the first time slot before the end position of downlink transmission, that is, time slot 2. Figure 7 As shown, time slot 2 is located in the MCOT of downlink transmission. Assuming that the GC-PDCCH in time slot 2 carries the SFI of time slot 3, it can be determined that N=2 n +1 -1=1. Assuming that time slot 1 is also located in MCOT and carries the SFI of time slot 3, N can also be 2. For example, Figure 7 In the example shown, for the case where the subcarrier spacing is 30 kHz, n=1, the second subcarrier before the downlink transmission termination position n+1 -1) time slot is the third time slot before the end position of downlink transmission, that is, time slot 3. Figure 7As shown, time slot 3 is located in the MCOT of downlink transmission. Assuming that the GC-PDCCH in time slot 3 does not carry the SFI of time slot 6, and the GC-PDCCH in time slot 5 carries the SFI of time slot 6, therefore, time slot 5 is located in the MCOT of downlink transmission and carries the SFI of time slot 6. The time slot is the farthest from the downlink transmission termination position. Therefore, it can be determined that time slot 5 is the time slot carrying the downlink transmission termination position, that is, N = 1. Assuming that time slot 6 also includes GC-PDCCH and carries the SFI of time slot 6, N can also be 0. Of course, the above examples are only exemplary, and the present disclosure is not limited thereto.

[0108] As described above, according to an embodiment of the present disclosure, the electronic device 100 can carry information about the termination position of downlink transmission for unlicensed spectrum through GC-PDCCH. Further, the electronic device 100 can also configure the number and position of time slots of GC-PDCCH for carrying information about the termination position of downlink transmission, so as to design GC-PDCCH more reasonably according to the characteristics of the NR communication system.

[0109] <2.2 Length and time domain position of MCOT carried by GC-PDCCH>

[0110] According to an embodiment of the present disclosure, the configuration unit 110 may configure the information sent through the GC-PDCCH to transmit the length and time domain position of the MCOT of the downlink transmission through the GC-PDCCH, where the MCOT includes one or more time slots. Here, the length of the MCOT may be represented by the number of time slots, for example, and the time domain position of the MCOT may include, for example, the time slot numbers of all time slots included in the MCOT.

[0111] According to the embodiment of the present disclosure, each time slot in the MCOT may be defined as a COT (Channel Occupy Time) unit. That is, the MCOT includes one or more COT units. Figure 8 Schematic diagram showing the relationship between the MCOT and COT units according to an embodiment of the present disclosure. Figure 8 As shown, the MCOT includes four time slots: time slot 1, time slot 2, time slot 3 and time slot 4, and each time slot can be a COT unit.

[0112] According to an embodiment of the present disclosure, only one subcarrier configuration is included in the MCOT, that is, the absolute lengths of all time slots included in the MCOT are equal, that is, the lengths of all OFDM symbols included in the MCOT are equal. Therefore, for one MCOT, the length of each COT unit therein is the same.

[0113] According to an embodiment of the present disclosure, the first transmission in the COT unit can be a downlink transmission process. That is, the transmission in the COT unit can be all downlink transmission (the COT unit has no uplink and downlink switching point); it can be a partial downlink transmission, followed by a partial uplink transmission (the COT unit includes 1 uplink and downlink switching point); it can also be a partial downlink transmission, followed by a partial uplink transmission, and then a partial downlink transmission (the COT unit includes 2 uplink and downlink switching points). In other words, the COT unit includes at least one downlink transmission process. Of course, this is only an exemplary description, and the first transmission in the COT unit can also be an uplink transmission process.

[0114] According to an embodiment of the present disclosure, the electronic device 100 may also configure the SFI of each COT unit in the MCOT so that the number of switching points between uplink transmission and downlink transmission included in each COT unit in the MCOT is not greater than 2. That is, the user equipment is allowed to send uplink feedback within the COT unit. Further, after the user equipment performs uplink feedback, the electronic device 100 may continue to send downlink data, thereby improving the utilization rate of the channel. Further, the electronic device 100 may also configure the SFI of each COT unit in the MCOT so that: the number of switching points between uplink transmission and downlink transmission included in the MCOT is not greater than a predetermined threshold. Here, the electronic device 100 may determine the size of the predetermined threshold according to the busyness of the channel. As a result, the electronic device 100 may limit the total number of switching points in the MCOT to avoid frequent uplink and downlink switching.

[0115] As described above, the electronic device 100 can carry the information of the length and time domain position of the MCOT through the GC-PDCCH, and define a COT unit to allow the user equipment to perform uplink transmission within the COT unit. In this way, more flexible uplink and downlink configurations are allowed to improve channel utilization efficiency.

[0116] <2.3 Whether the channel detection process needs to be performed before uplink transmission in MCOT is carried by GC-PDCCH>

[0117] According to an embodiment of the present disclosure, the configuration unit 110 may configure information sent through the GC-PDCCH to transmit information about whether a channel detection process needs to be performed before uplink transmission in a COT unit of the MCOT through the GC-PDCCH.

[0118] As described above, the user equipment can perform uplink transmission in the COT unit, such as sending uplink feedback, including but not limited to ACK (Acknowledgement) / NACK (Negative Acknowledgment) information. In the LTE system, the user equipment needs to perform a channel detection process before performing such uplink transmission, and can only perform uplink transmission in the COT unit when the channel detection is idle.

[0119] In the NR communication system, the larger the subcarrier spacing, the shorter the absolute length of a time slot. When the subcarrier spacing is relatively large, the absolute length of a time slot is very short. In this case, it may be meaningless for the user equipment to perform a channel detection process before uplink transmission. Therefore, according to an embodiment of the present disclosure, the electronic device 100 can configure the user equipment with information on whether a channel detection process needs to be performed before uplink transmission in the COT unit of the MCOT. For example, the electronic device 100 can determine whether the user equipment needs to perform a channel detection process before uplink transmission based on the subcarrier spacing of the system. Specifically, when the subcarrier spacing of the system is greater than or equal to a certain threshold, the electronic device 100 can determine that the user equipment does not need to perform a channel detection process before uplink transmission; when the subcarrier spacing of the system is less than a certain threshold, the electronic device 100 can determine that the user equipment needs to perform a channel detection process before uplink transmission. Preferably, the threshold can be 120kHZ.

[0120] Furthermore, the configuration unit 110 of the electronic device 100 may use the GC-PDCCH to carry information on whether the user equipment needs to perform a channel detection process before performing uplink transmission in the COT unit of the MCOT.

[0121] According to an embodiment of the present disclosure, the configuration unit 110 may also configure the information sent through the PDCCH to transmit information about whether a channel detection process needs to be performed before uplink transmission in the COT unit of the MCOT through the PDCCH. For example, the configuration unit 110 may carry information about whether a user equipment needs to perform a channel detection process before uplink transmission in the COT unit through the private search area of ​​the PDCCH. Further, the communication unit 120 may transmit information about whether a user equipment needs to perform a channel detection process before uplink transmission in the COT unit again through the PDCCH.

[0122] As described above, according to an embodiment of the present disclosure, both GC-PDCCH and PDCCH can be used to send information about whether the user equipment needs to perform a channel detection process before uplink transmission within the COT unit, so as to prevent the user equipment from not receiving the information on the GC-PDCCH or demodulating the information on the GC-PDCCH incorrectly.

[0123] According to an embodiment of the present disclosure, the channel detection process may be a LBT (Listen Before Talk) process. For example, the channel detection process may be a Type 2 channel detection process, that is, a channel detection process that does not include a random backoff process.

[0124] As described above, according to an embodiment of the present disclosure, the electronic device 100 can configure information on whether a channel detection process needs to be performed before uplink transmission in the COT unit for the user equipment, so that the channel detection process is not performed in some cases to save signaling overhead.

[0125] <2.4 Parameter information of channel detection process carried by GC-PDCCH>

[0126] According to an embodiment of the present disclosure, the configuration unit 110 may configure information sent through the GC-PDCCH to transmit parameter information about a channel detection process performed before uplink transmission in the COT of the MCOT through the GC-PDCCH.

[0127] According to an embodiment of the present disclosure, when the electronic device 100 does not send information about whether a channel detection process needs to be performed before uplink transmission in the COT unit to the user equipment through the GC-PDCCH, it can be assumed that the user equipment needs to perform a channel detection process before each uplink transmission, so the parameters of the channel detection process performed before uplink transmission in the COT of the MCOT can be for all channel detection processes. When the electronic device 100 sends information about the need to perform a channel detection process before uplink transmission in the COT unit to the user equipment through the GC-PDCCH, the parameters of the channel detection process performed before uplink transmission in the COT of the MCOT can be for the channel detection process that needs to be performed.

[0128] According to an embodiment of the present disclosure, the parameters of the channel detection process include but are not limited to the start time information of the channel detection process, such as the position of the OFDM symbol where the start time is located. Of course, the parameters of the channel detection process may also include other parameters related to the execution of the channel detection process.

[0129] As described above, according to an embodiment of the present disclosure, the electronic device 100 can carry parameters related to the channel detection process through the GC-PDCCH. Compared with the public search area of ​​the PDCCH for user equipment in the entire cell, the GC-PDCCH is for a group of user equipment, thereby narrowing the user range to a certain extent. Compared with the private search area of ​​the PDCCH for a specific user equipment, similar information can be sent to a group of user equipment, thereby saving signaling overhead.

[0130] <2.5 Carrying control information related to the data in the previous time slot through GC-PDCCH>

[0131] According to an embodiment of the present disclosure, the configuration unit 110 may configure information sent through the GC-PDCCH to transmit control information related to data in a time slot preceding a time slot where the GC-PDCCH is located through the GC-PDCCH.

[0132] Fig. 9 FIG. 1 is a schematic diagram showing transmission of control information related to data in a previous time slot through a GC-PDCCH according to an embodiment of the present disclosure. Fig. 9 In the figure, the horizontal axis represents time and the vertical axis represents frequency. Fig. 9 The diagram shows the situation of three time slots (time slot 1, time slot 2 and time slot 3). The oblique line shaded area represents the area occupied by PDCCH, for example, the first three OFDM symbols of each time slot, and the black solid area represents the area occupied by GC-PDCCH. The grid area represents the starting position of the downlink transmission for the unlicensed spectrum. Fig. 9 As shown in FIG. 1 , due to various reasons, no PDCCH is sent in time slot 1, so the device cannot decode the data in time slot 1. According to an embodiment of the present disclosure, the GC-PDCCH in time slot 2 can be used to carry control information related to the data in time slot 1, so that the data in time slot 1 is not wasted. It is worth noting that although Fig. 9 It is not shown, but the GC-PDCCH in time slot 2 can carry other information according to any of the aforementioned implementations, such as information on the termination position of the downlink transmission, SFI information of time slot 2 and subsequent time slots, etc.

[0133] According to an embodiment of the present disclosure, when control information related to data in a previous time slot is not sent in a previous time slot, the electronic device 100 can transmit control information related to data in a previous time slot through a GC-PDCCH. Here, the previous time slot can be a time slot in which a GC-PDCCH is sent, or a time slot in which a GC-PDCCH is not sent.

[0134] According to an embodiment of the present disclosure, the reason why the control information related to the data in the previous time slot is not transmitted in the previous time slot may be that the channel detection of the electronic device 100 is successful after the PDCCH region of the previous time slot. Fig. 9 As shown, the electronic device 100 detects that the channel is idle after the PDCCH region of time slot 1, but has missed the transmission time of PDCCH, resulting in no transmission of control information related to the data in time slot 1. It is worth noting that Fig. 9 2 shows the situation where the PDCCH region in time slot 1 does not include the GC-PDCCH. Of course, the PDCCH in time slot 1 may also include the GC-PDCCH, and in this case the GC-PDCCH is not sent out either.

[0135] According to an embodiment of the present disclosure, assuming that the start position of downlink transmission for unlicensed spectrum is located after the PDCCH area of ​​a time slot, and no control information related to the data in the time slot is sent in the time slot, in this case, the user equipment does not know the control information related to the data in the time slot, and therefore cannot decode this part of the data, resulting in a waste of resources. According to an embodiment of the present disclosure, the GC-PDCCH of the next time slot can be used to carry the control information related to the data in the previous time slot, so that the user equipment can decode this part of the data, thereby improving the utilization rate of the channel.

[0136] According to an embodiment of the present disclosure, the data in the previous time slot may be part of the downlink transmission data, that is, the time slot where the GC-PDCCH is located will continue to send the downlink data that has not been sent in the previous time slot, that is, the data in the previous time slot and the data in the time slot where the GC-PDCCH is located belong to the same data packet. Further, the data in the previous time slot may also be all the downlink transmission data. That is, the data in the previous time slot includes a complete data packet.

[0137] According to an embodiment of the present disclosure, control information related to the data in the previous time slot can be used to decode the data in the previous time slot, that is, information related to decoding the data in the previous time slot. For example, the control information may indicate the MCS (Modulation and Coding Scheme) level of the data in the previous time slot. Specifically, the control information may include an index of the MCS level of the data in the previous time slot. That is, the electronic device 100 and the user equipment both store the correspondence between the MCS level and the index, and when the user equipment obtains the index of the MCS level, the MCS level can be determined, so that the data can be decoded. Further, the control information may also indicate the SFI of the data in the previous time slot, so that the user equipment can determine the uplink and downlink configuration information of the previous time slot, so as to decode the data.

[0138] According to an embodiment of the present disclosure, since no control information is sent in the previous time slot, assuming that the previous time slot is a time slot for sending GC-PDCCH, the GC-PDCCH of the previous time slot is not sent out, so the user equipment is likely to not know the SFI of the previous time slot. Therefore, the electronic device 100 can send the data in the previous time slot of the time slot where the GC-PDCCH is located according to the default time slot format information SFI. For example, the electronic device 100 can send the data in the previous time slot according to the SFI agreed in advance between the electronic device 100 and the user equipment, so that the user equipment can receive the data in the previous time slot according to the SFI agreed in advance. Further, the electronic device 100 can also send the data in the previous time slot according to the SFI of the previous time slot set by the electronic device 100 (that is, the same as the SFI setting when the GC-PDCCH is sent in the previous time slot), so that the user equipment can default that the OFDM symbols in the time slot are all used for downlink transmission, thereby receiving the data of the previous time slot on all OFDM symbols.

[0139] According to an embodiment of the present disclosure, the GC-PDCCH may carry the SFI in the previous time slot. That is, the GC-PDCCH in a time slot may carry one or more of the following information: the SFI of the current time slot; the SFI of the time slot after the current time slot; and the SFI of the time slot before the current time slot. Further, the GC-PDCCH in a time slot may carry the SFI of one or more time slots.

[0140] According to an embodiment of the present disclosure, the communication unit 120 may also send a notification to the user equipment so that the user equipment receives control information related to the data in the previous time slot through the GC-PDCCH.

[0141] According to the embodiment of the present disclosure, since GC-PDCCH has a certain period, it is assumed that the current time slot is not a time slot for sending GC-PDCCH. The electronic device needs to use the GC-PDCCH of the current time slot to carry the control information related to the data of the previous time slot, while the user equipment receives the GC-PDCCH according to the original GC-PDCCH reception period, and therefore does not receive the GC-PDCCH in the current time slot. In this case, the electronic device 100 can send a notification to the user equipment to notify the user equipment that it needs to receive the GC-PDCCH of the current time slot to obtain the control information related to the data in the previous time slot. Fig. 9 For example, when the electronic device 100 finds that the starting position of the downlink data has missed the PDCCH area of ​​time slot 1, it can send a notification to the user equipment to notify the user equipment to receive GC-PDCCH in time slot 2.

[0142] According to an embodiment of the present disclosure, the electronic device 100 may send the above notification to the user equipment through the authorized spectrum. Further, the electronic device 100 may send such notification to the user equipment through the authorized spectrum using high-layer signaling (including but not limited to RRC signaling) or low-layer signaling (including but not limited to physical layer signaling).

[0143] According to an embodiment of the present disclosure, the electronic device 100 may also configure the transmission period of the GC-PDCCH, and may send the configured transmission period of the GC-PDCCH to the user equipment. In addition, the electronic device 100 may also reconfigure the transmission period of the GC-PDCCH, and may send the reconfigured transmission period of the GC-PDCCH to the user equipment.

[0144] According to an embodiment of the present disclosure, the electronic device 100 can send the transmission period of GC-PDCCH or the reconfigured transmission period of GC-PDCCH to the user equipment through the authorized spectrum. Further, the electronic device 100 can send the transmission period of GC-PDCCH or the reconfigured transmission period of GC-PDCCH to the user equipment through the authorized spectrum using high-layer signaling (including but not limited to RRC signaling) or low-layer signaling (including but not limited to physical layer signaling).

[0145] As described above, according to the embodiments of the present disclosure, control information related to data in the previous time slot can be transmitted via the GC-PDCCH of the current time slot, so that the user equipment can correctly decode the data in the previous time slot, thereby improving channel utilization.

[0146] In addition, ePDCCH can also be used to carry control information related to part of the data in the current time slot. ePDCCH can use PDSCH (Physical Downlink Share Channel) resources to carry control information. Therefore, even if PDCCH is not sent, ePDCCH interspersed in the data can still be used to carry control information, and users can demodulate the data by demodulating the control information.

[0147] <2.6 Sending GC-PDCCH in the next time slot when GC-PDCCH was not sent in the previous time slot>

[0148] According to an embodiment of the present disclosure, the configuration unit 110 may configure data transmitted through the GC-PDCCH so that the GC-PDCCH is transmitted in the next time slot if the GC-PDCCH in the previous time slot is not successfully transmitted.

[0149] According to an embodiment of the present disclosure, as described above, the GC-PDCCH transmitted in the next time slot may carry control information related to the data in the previous time slot.

[0150] According to an embodiment of the present disclosure, according to the setting of the transmission period of GC-PDCCH, assuming that the previous time slot is a time slot in which GC-PDCCH should be transmitted, the immediately following time slot may be a time slot in which GC-PDCCH should be transmitted, or the immediately following time slot may be a time slot in which GC-PDCCH should not be transmitted. According to an embodiment of the present disclosure, in the case that GC-PDCCH in the previous time slot is not transmitted successfully, the electronic device 100 transmits GC-PDCCH in the immediately following time slot regardless of the transmission period of GC-PDCCH.

[0151] Fig.10 2 is a schematic diagram showing that control information related to data in a previous time slot is transmitted in a next time slot regardless of the transmission cycle of GC-PDCCH according to an embodiment of the present disclosure when control information is not transmitted in the previous time slot. Fig.10 As shown, the horizontal axis represents time and the vertical axis represents frequency. Fig.10 The diagram shows the situation of four time slots (time slot 1, time slot 2, time slot 3 and time slot 4). The oblique line shaded area indicates the area occupied by PDCCH, for example, the first three OFDM symbols of each time slot, and the black solid area indicates the area occupied by GC-PDCCH. The grid area indicates the starting position of the downlink transmission for the unlicensed spectrum. Fig.10 In the example, the transmission period of GC-PDCCH is two time slots, that is, GC-PDCCH should be transmitted in time slot 1 and time slot 3. Fig.10As shown, due to various reasons, such as the unsuccessful channel detection mentioned above, the PDCCH area in time slot 1 is not sent, that is, the GC-PDCCH in time slot 1 is not sent successfully, then the electronic device 100 can send GC-PDCCH in time slot 2. Here, since time slot 2 is not a time slot where GC-PDCCH should be sent, the electronic device 100 can use time slot 2 to send control information related to the data in time slot 1.

[0152] As described above, according to the embodiments of the present disclosure, when the GC-PDCCH in the previous time slot is not successfully transmitted, the electronic device 100 can transmit the GC-PDCCH in the next time slot. In this way, since the electronic device 100 has occupied the channel in the next time slot, the possibility of correctly receiving and decoding the GC-PDCCH by the user equipment when transmitting the GC-PDCCH in the next time slot is greatly improved.

[0153] According to an embodiment of the present disclosure, since time slot 2 is not a time slot in which GC-PDCCH should be sent, the electronic device 100 can send a notification to the user equipment so that the user equipment receives control information related to the data in the previous time slot through GC-PDCCH. Further, the electronic device 100 can send a notification to the user equipment through the authorized spectrum. According to an embodiment of the present disclosure, the electronic device 100 may not send a notification to the user equipment, so that when the user equipment does not receive GC-PDCCH in time slot 1, it automatically receives GC-PDCCH in time slot 2.

[0154] According to an embodiment of the present disclosure, the electronic device 100 can also change the transmission period of the GC-PDCCH and reconfigure the transmission period of the GC-PDCCH to the user equipment. For example, the electronic device 100 can send the reconfigured transmission period of the GC-PDCCH to the user equipment through the authorized spectrum.

[0155] As described above, according to an embodiment of the present disclosure, when the electronic device 100 fails to send GC-PDCCH successfully in the previous time slot, it can use the next time slot to send GC-PDCCH, and temporarily ignore the transmission cycle of GC-PDCCH, so that the user equipment can successfully demodulate the data in the previous time slot, thereby improving channel utilization.

[0156] It can be seen that according to the electronic device 100 of the embodiment of the present disclosure, one or more of the following information can be transmitted through GC-PDCCH: information on the termination position of downlink transmission for unlicensed spectrum; length and time domain position information of MCOT of downlink transmission; information on whether a channel detection process needs to be performed before uplink transmission in the COT unit; parameter information of the channel detection process; and control information related to the data in the previous time slot of the time slot where the GC-PDCCH is located. According to the embodiment of the present disclosure, the electronic device 100 can send any of the above information separately, or send multiple information in combination. Compared with the public search area of ​​PDCCH for user equipment in the entire cell, GC-PDCCH is for a group of user equipment, thereby narrowing the user range to a certain extent. Compared with the private search area of ​​PDCCH for specific user equipment, similar information can be sent to a group of user equipment, thereby saving signaling overhead. It can be seen that the present disclosure designs GC-PDCCH more reasonably for the characteristics of the NR communication system.

[0157] <2.7 Bearer at the start position of downlink transmission>

[0158] According to an embodiment of the present disclosure, the configuration unit 110 may configure information on a starting position of downlink transmission for an unlicensed spectrum, and the communication unit 120 may send information on a starting position of downlink transmission for an unlicensed spectrum.

[0159] According to an embodiment of the present disclosure, information on the starting position of downlink transmission for unlicensed spectrum may be carried by high-layer signaling, including but not limited to RRC signaling.

[0160] According to an embodiment of the present disclosure, the information on the starting position of the downlink transmission for the unlicensed spectrum may include one or more of the following: indication information of the subframe corresponding to the starting position of the downlink transmission, indication information of the time slot corresponding to the starting position of the downlink transmission, and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission.

[0161] According to an embodiment of the present disclosure, the starting position of the downlink transmission for the unlicensed spectrum may include the possible starting positions of the downlink transmission for the unlicensed spectrum, so the information of the starting position of the downlink transmission for the unlicensed spectrum may include one or more starting positions.

[0162] According to an embodiment of the present disclosure, the configuration unit 110 can configure the information of the starting position of the downlink transmission for the unlicensed spectrum according to the length of the OFDM symbol included in the MCOT of the downlink transmission (or the size of the subcarrier spacing). Specifically, when the length of the OFDM symbol included in the MCOT is smaller, that is, the subcarrier spacing is larger, more starting positions for the downlink transmission of the unlicensed spectrum can be configured. In other words, the smaller the length of the OFDM symbol included in the MCOT, the more time slots are included in a subframe, and therefore the more optional starting positions for the downlink transmission.

[0163] According to an embodiment of the present disclosure, the information on the starting position of the downlink transmission for the unlicensed spectrum may include indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information may include the index of the OFDM symbol in the subframe. For example, the OFDM symbols in a subframe may be sorted and numbered according to the order in the time domain to determine the index of each OFDM symbol. Further, when one or more starting positions of the downlink transmission are determined, the configuration unit 110 may configure the index of the OFDM symbol corresponding to the one or more starting positions as the information on the starting position of the downlink transmission for the unlicensed spectrum, and send such information through the communication unit 120.

[0164] According to an embodiment of the present disclosure, the starting position of the downlink transmission for the unlicensed spectrum can be located at the starting position and the middle position of a time slot. That is, for a time slot including 14 OFDM symbols (numbered #0, #1, ..., #13 respectively), the starting position of the downlink transmission for the unlicensed spectrum can be located at the OFDM symbols numbered #0 and #7, thereby simplifying the design of signaling and saving overhead. In this case, for the above-mentioned embodiment, for the configuration of 15×n (kHZ) subcarriers (n=1, 2, 4, 8, 16, 32), each subframe includes n time slots, each time slot includes 2 OFDM symbols that can be used as the starting position of the downlink transmission for the unlicensed spectrum, so each subframe includes 2n OFDM symbols that can be used as the starting position of the downlink transmission for the unlicensed spectrum. For the case of n=32, each subframe includes 64 OFDM symbols that can be used as the starting position of downlink transmission for unlicensed spectrum, so at most 6 bits of information are needed to indicate the index of the OFDM symbol in the subframe.

[0165] According to an embodiment of the present disclosure, the information on the starting position of the downlink transmission of the unlicensed spectrum may include indication information of the time slot corresponding to the starting position of the downlink transmission and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information may include the index of the time slot in the subframe and the index of the OFDM symbol in the time slot. For example, the time slots in a subframe may be sorted and numbered in order in the time domain to determine the index of each time slot in the subframe. In addition, the OFDM symbols in a time slot may be sorted and numbered in order in the time domain to determine the index of each OFDM in the time slot. Further, after determining one or more starting positions of the downlink transmission, the configuration unit 110 may configure the index of the time slot corresponding to the one or more starting positions in the subframe and the index of the OFDM symbol corresponding to the starting position in the time slot as the information on the starting position of the downlink transmission of the unlicensed spectrum, and send such information through the communication unit 120.

[0166] For the configuration of 15×n (kHZ) subcarriers (n=1, 2, 4, 8, 16, 32), each subframe includes n time slots. When n=32, each subframe includes 32 time slots, so 5 bits are required to indicate the index of the time slot in the subframe. Similarly, for the case where the starting position of the downlink transmission can be located at OFDM symbols numbered #0 and #7 in a time slot, each time slot includes 2 OFDM symbols that can be used as the starting position of the downlink transmission for the unlicensed spectrum, so 1 bit is required to indicate the index of the OFDM symbol in the time slot. In other words, a total of 6 bits are required to indicate the index of the time slot corresponding to the starting position in the subframe and the index of the OFDM symbol corresponding to the starting position in the time slot corresponding to the starting position.

[0167] According to an embodiment of the present disclosure, the starting position of downlink transmission for unlicensed spectrum may include one or more of the following positions: a boundary position of a subframe; a boundary position of a time slot; and a middle position of a time slot.

[0168] Here, the boundary position of the subframe refers to the starting position of each subframe; the boundary position of the time slot refers to the starting position of each time slot. When the time slot is the first time slot in the subframe, the boundary position of the time slot is actually also the boundary position of the subframe; the middle position of the time slot refers to the midpoint of a time slot in the time domain. For a time slot including 14 OFDM symbols (numbered #0, #1, ..., #13 respectively), the middle position of the time slot refers to the OFDM symbol numbered #7.

[0169] According to an embodiment of the present disclosure, the information of the starting position of the downlink transmission for the unlicensed spectrum may include information indicating the type of the starting position, so as to indicate which one or more of the following positions the starting position of the downlink transmission is: a boundary position of a subframe; a boundary position of a time slot; and a middle position of a time slot. Exemplarily, such type information may be represented by a type index.

[0170] The following exemplary combinations of the above information are shown: subframe boundary position; time slot boundary position; subframe boundary position or time slot boundary position; time slot boundary position or time slot middle position; and subframe boundary position or time slot boundary position or time slot middle position. For example, the electronic device 100 can use 3 bits of information to indicate the index of the above combination, as shown in Table 2.

[0171] Table 2

[0172]

[0173] According to the embodiments of the present disclosure, since the starting position of the downlink transmission can be located at the boundary position of the subframe, the boundary position of the time slot, the boundary position of the subframe or the boundary position of the time slot, the boundary position of the time slot or the middle position of the time slot, or the boundary position of the subframe, the boundary position of the time slot or the middle position of the time slot, the electronic device 100 can schedule the downlink transmission in units of subframes, can also schedule the downlink transmission in units of time slots, and can also schedule the downlink transmission in units of half the length of the time slot, so that the unlicensed frequency band has more downlink transmission opportunities, thereby improving the utilization efficiency of the unlicensed spectrum.

[0174] As described above, the present disclosure describes the configuration of the information of the starting position of the downlink transmission for the unlicensed spectrum through several non-limiting examples. Of course, the information of the starting position of the downlink transmission for the unlicensed spectrum can also be configured in other ways, as long as the starting position of the downlink transmission for the unlicensed spectrum can be indicated.

[0175] As described above, according to the electronic device 100 of the embodiment of the present disclosure, the starting position of the downlink transmission for the unlicensed spectrum can be carried by, for example, high-layer signaling. In this way, compared with the LTE LAA (Licensed Assisted Access) system, the unlicensed frequency band in the NR communication system has more downlink transmission opportunities, which improves the utilization efficiency of the unlicensed spectrum.

[0176] <3. User Equipment Configuration Example>

[0177] Fig.111 is a block diagram showing a structure of an electronic device 1100 used as a user equipment in a wireless communication system according to an embodiment of the present disclosure. The electronic device 1100 here can be used as a user equipment in the NR communication system.

[0178] like Fig.11 As shown, the electronic device 1100 may include a demodulation unit 1110 and a communication unit 1120 .

[0179] Here, each unit of the electronic device 1100 may be included in a processing circuit. It should be noted that the electronic device 1100 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.

[0180] According to an embodiment of the present disclosure, the communication unit 1120 may receive downlink information, including downlink information sent via GC-PDCCH and PDCCH, from a network side device providing services for the electronic device 1100. Further, the demodulation unit 1110 may demodulate the downlink information.

[0181] According to an embodiment of the present disclosure, the electronic device 1100 can use the unlicensed spectrum to receive information sent through the GC-PDCCH. Further, the electronic device 1100 can also use the licensed spectrum to receive information sent through the GC-PDCCH. In this way, the electronic device 1100 can ensure the reliability of receiving the information carried on the GC-PDCCH.

[0182] <3.1 Receiving downlink transmission termination position through GC-PDCCH>

[0183] According to an embodiment of the present disclosure, the communication unit 1120 may receive information via the GC-PDCCH. Further, the demodulation unit 1110 may demodulate the information received via the GC-PDCCH to obtain a downlink transmission termination position for the unlicensed spectrum.

[0184] According to an embodiment of the present disclosure, the demodulation unit 1110 may also demodulate the information received through the GC-PDCCH to obtain the time slot format information SFI of the time slot where the downlink transmission termination position is located. As described above, the network side device carries the information of the downlink transmission termination position and the SFI of the time slot where the downlink transmission termination position is located through the GC-PDCCH in the same time slot. Therefore, the demodulation unit 1110 may demodulate the information received through the GC-PDCCH in the same time slot to obtain the downlink transmission termination position and the SFI of the time slot where the downlink transmission termination position is located.

[0185] According to an embodiment of the present disclosure, the communication unit 1120 may also receive information through the PDCCH. Further, the demodulation unit 1110 may also demodulate the information received through the PDCCH to obtain the downlink transmission termination position for the unlicensed spectrum. As mentioned above, the network side device may transmit the information of the downlink transmission termination position for the unlicensed spectrum through both the GC-PDCCH and the PDCCH. Therefore, the demodulation unit 1110 may demodulate the public search area or the private search area of ​​the PDCCH to obtain the downlink transmission termination position for the unlicensed spectrum.

[0186] According to an embodiment of the present disclosure, the demodulation unit 1110 can demodulate the information received through GC-PDCCH to obtain the downlink transmission termination position for the unlicensed spectrum, and can also demodulate the information received through PDCCH to obtain the downlink transmission termination position for the unlicensed spectrum. When the two conflict, that is, the downlink transmission termination position obtained by demodulating the information received through GC-PDCCH is different from the downlink transmission termination position obtained by demodulating the information received through PDCCH, the demodulation unit 1110 can use the downlink transmission termination position for the unlicensed spectrum obtained by demodulating the information received through PDCCH as the criterion, that is, use the downlink transmission termination position obtained by demodulating the information received through PDCCH as the downlink transmission termination position.

[0187] As described above, according to the electronic device 1100 of the embodiment of the present disclosure, the downlink transmission termination position can be obtained through both GC-PDCCH and PDCCH, so as to prevent the user equipment from not receiving GC-PDCCH or decoding errors of information carried on GC-PDCCH.

[0188] Fig.12 2 is a signaling interaction diagram showing the transmission of the downlink transmission termination position through the GC-PDCCH according to an embodiment of the present disclosure. Fig.12 As shown, in step S1201, the base station carries the downlink transmission termination position for the unlicensed spectrum through GC-PDCCH. Next, in step S1202, the UE (User Equipment) obtains the downlink transmission termination position for the unlicensed spectrum by demodulating the GC-PDCCH.

[0189] As described above, the electronic device 1100 can obtain the downlink transmission termination position for the unlicensed spectrum through the GC-PDCCH. In this way, for the information in the PDCCH public search area, the electronic device 1100 needs to attempt blind detection at two aggregation levels, while the GC-PDCCH only contains a search space for one aggregation level, thereby reducing the blind detection workload of the electronic device 1100. Furthermore, compared to carrying the above information through the PDCCH private search area, carrying the above information through the GC-PDCCH enables the electronic device 1100 to obtain the downlink transmission termination position earlier, thereby preparing for uplink feedback or uplink data transmission.

[0190] <3.2 Length and time domain position of MCOT received through GC-PDCCH>

[0191] According to an embodiment of the present disclosure, the demodulation unit 1110 may also demodulate information received through the GC-PDCCH to obtain the length and time domain position of the maximum channel occupancy time MCOT of downlink transmission, where the MCOT includes one or more time slots.

[0192] As mentioned above, each time slot in the MCOT can be defined as a COT unit. That is, the MCOT includes one or more COT units. Here, the length of the MCOT can be represented by the number of time slots or COT units, and the time domain position of the MCOT can include, for example, the time slot numbers of all time slots or COT units included in the MCOT.

[0193] In an LTE communication system, the length and time domain position of MCOT are only known by the network side device, while the user equipment does not know the length and time domain position of MCOT, so the user equipment may not have time to provide uplink feedback. According to an embodiment of the present disclosure, the electronic device 1100 can obtain the length and time domain position of MCOT through GC-PDCCH, so as to prepare for uplink feedback.

[0194] According to an embodiment of the present disclosure, the number of switching points between uplink transmission and downlink transmission included in each COT unit in MCOT is not greater than 2. That is, the electronic device 1100 can perform uplink transmission in the COT unit, such as sending uplink feedback information. Further, after the electronic device 1100 performs uplink feedback, the network side device can also continue to send downlink data, thereby improving the utilization rate of the channel. Further, the number of switching points between uplink transmission and downlink transmission included in MCOT may not be greater than a predetermined threshold, thereby avoiding frequent uplink and downlink switching.

[0195] As shown above, according to an embodiment of the present disclosure, a COT unit in the MCOT is defined for the NR communication system, and each COT unit is similar to the MCOT in the LTE communication system. In other words, the electronic device 1100 is allowed to feedback uplink data in each COT unit. In addition, the network side device is allowed to continue to send downlink data after the electronic device 1100 feedbacks the uplink data. As a result, the configuration of the NR communication system is more flexible.

[0196] <3.3 Information on whether a channel detection process needs to be performed before uplink transmission in MCOT is received through GC-PDCCH>

[0197] According to an embodiment of the present disclosure, the demodulation unit 1110 may demodulate information received through the GC-PDCCH to determine whether a channel detection process needs to be performed before uplink transmission in the COT unit of the MCOT.

[0198] According to an embodiment of the present disclosure, when the information demodulated by the demodulation unit 1110 indicates that a channel detection process needs to be performed before uplink transmission is performed in the COT unit of the MCOT, the electronic device 1100 needs to perform the channel detection process, and only when the channel detection is idle, the uplink transmission is performed in the COT unit. Further, when the information demodulated by the demodulation unit 1110 indicates that a channel detection process does not need to be performed before uplink transmission is performed in the COT unit of the MCOT, the electronic device 1100 does not need to perform the channel detection process, and can directly perform uplink transmission in the COT unit of the MCOT.

[0199] According to an embodiment of the present disclosure, uplink transmission may include uplink feedback of downlink data from a network side device, such as ACK / NACK. In addition, the channel detection process may also be an LBT process, such as a Type 2 channel detection process.

[0200] According to an embodiment of the present disclosure, the communication unit 1120 may also receive information via PDCCH. Further, the demodulation unit 1110 may also demodulate the information received via PDCCH to determine whether a channel detection process needs to be performed before uplink transmission in the COT unit of the MCOT.

[0201] According to an embodiment of the present disclosure, the demodulation unit 1110 can demodulate the information received through the GC-PDCCH to determine whether a channel detection process needs to be performed before uplink transmission in the COT unit of the MCOT, and can also demodulate the information received through the PDCCH to determine whether a channel detection process needs to be performed before uplink transmission in the COT unit of the MCOT. Further, when the above two conflict, that is, the information received through GC-PDCCH is demodulated to determine that a channel detection process needs to be performed before uplink transmission in the COT unit of MCOT, and the information received through PDCCH is demodulated to determine that a channel detection process does not need to be performed before uplink transmission in the COT unit of MCOT, or the information received through GC-PDCCH is demodulated to determine that a channel detection process does not need to be performed before uplink transmission in the COT unit of MCOT, and the information received through PDCCH is demodulated to determine that a channel detection process needs to be performed before uplink transmission in the COT unit of MCOT, the demodulation unit may determine whether the channel detection process needs to be performed before uplink transmission in the COT unit of MCOT based on the information received through PDCCH.

[0202] As described above, according to an embodiment of the present disclosure, the electronic device 1100 can receive information about whether the electronic device 1100 needs to perform a channel detection process before performing uplink transmission in the COT unit through both GC-PDCCH and PDCCH, so as to prevent the electronic device 1100 from not receiving the information on the GC-PDCCH or incorrectly demodulating the information on the GC-PDCCH. Further, the network side device can configure the electronic device 1100 whether it needs to perform a channel detection process before performing uplink transmission in the COT unit. That is, in some cases, the electronic device 1100 may not need to perform a channel detection process and directly perform uplink transmission in the COT unit, thereby saving signaling overhead.

[0203] <3.4 Parameter information of channel detection process received through GC-PDCCH>

[0204] According to an embodiment of the present disclosure, the demodulation unit 1100 may demodulate information received through the GC-PDCCH to obtain parameters of a channel detection process performed before uplink transmission in a COT unit of the MCOT.

[0205] According to an embodiment of the present disclosure, when the electronic device 1100 does not receive information from the network side device about whether a channel detection process needs to be performed before uplink transmission in the COT unit, it can be assumed that the electronic device 1100 needs to perform a channel detection process before each uplink transmission, so the parameters of the channel detection process performed before uplink transmission in the COT of the MCOT can be for all channel detection processes. When the electronic device 1100 receives information from the network side device about the need to perform a channel detection process before uplink transmission in the COT unit, the parameters of the channel detection process performed before uplink transmission in the COT of the MCOT can be for the channel detection process that needs to be performed.

[0206] According to an embodiment of the present disclosure, the parameters of the channel detection process include but are not limited to the start time information of the channel detection process, such as the position of the OFDM symbol where the start time is located. Of course, the parameters of the channel detection process may also include other parameters related to the execution of the channel detection process.

[0207] As described above, according to an embodiment of the present disclosure, the electronic device 1100 can obtain parameters related to the channel detection process through the GC-PDCCH. The GC-PDCCH only contains a search space of one aggregation level, thereby reducing the blind detection workload of the user equipment. Further, by carrying the above information through the GC-PDCCH, the electronic device 1100 can obtain parameters related to the channel detection process earlier, thereby preparing for uplink feedback or uplink data transmission.

[0208] Fig.13 1 is a signaling interaction diagram showing at least one of the transmission of the MCOT length and position, whether LBT needs to be performed, and LBT parameters through GC-PDCCH according to an embodiment of the present disclosure. Fig.13 As shown, in step S1301, the base station carries at least one of the length and time domain position of the MCOT, whether the LBT process needs to be performed before uplink transmission in the COT unit, and parameters related to the LBT process through the GC-PDCCH. Next, in step S1302, the UE obtains the above information by demodulating the GC-PDCCH. Assuming that the information on whether the LBT process needs to be performed obtained by the UE indicates that the LBT process needs to be performed, or the UE does not receive the information on whether the LBT process needs to be performed, then in step S1303, the UE performs the LBT process before uplink transmission. Next, in step S1304, when the channel detects idleness, the UE sends ACK / NACK information in the COT unit. Assuming that the information on whether the LBT process needs to be performed obtained by the UE in step S1302 indicates that the LBT process does not need to be performed, then in step S1304, the UE directly sends ACK / NACK information in the COT unit. Fig.13 Only an example in which the channel detection process is an LBT process and the uplink transmission is ACK / NACK information is shown. Of course, the channel detection process may also be other types of channel detection processes, and the uplink transmission may also be other uplink information.

[0209] <3.5 Receiving control information related to data in the previous time slot through GC-PDCCH>

[0210] According to an embodiment of the present disclosure, the demodulation unit 1110 may demodulate information received through the GC-PDCCH to acquire control information related to data in a time slot preceding a time slot where the GC-PDCCH is located.

[0211] According to an embodiment of the present disclosure, the data in the previous time slot may be part of the downlink transmission data, that is, the time slot where the GC-PDCCH is located will continue to send the downlink data that has not been sent in the previous time slot, that is, the data in the previous time slot and the data in the time slot where the GC-PDCCH is located belong to the same data packet. Further, the data in the previous time slot may also be all the downlink transmission data. That is, the data in the previous time slot includes a complete data packet.

[0212] According to an embodiment of the present disclosure, the control information may be used to demodulate the data in the previous time slot. That is, the control information is related to the demodulation of the data in the previous time slot.

[0213] According to an embodiment of the present disclosure, the electronic device 1100 can determine the MCS level of the data in the previous time slot according to the control information. Specifically, the control information may include an index of the MCS level of the data in the previous time slot. That is, the network side device and the electronic device 1100 both store the corresponding relationship between the MCS level and the index. When the electronic device 1100 obtains the index of the MCS level, the MCS level can be determined, so that the data can be decoded.

[0214] Further, the electronic device 1100 may determine the SFI of the data in the previous time slot according to the control information, thereby determining the uplink and downlink configuration information of the previous time slot and decoding the data in the previous time slot.

[0215] According to an embodiment of the present disclosure, since no control information is sent in the previous time slot, assuming that the previous time slot is a time slot for sending GC-PDCCH, then the GC-PDCCH of the previous time slot is not sent out, so the electronic device 1100 is likely to not know the SFI of the previous time slot. Therefore, the electronic device 1100 can receive the data in the previous time slot of the time slot where the GC-PDCCH is located according to the default time slot format information SFI. For example, the electronic device 1100 can receive the data in the previous time slot according to the SFI agreed in advance with the network side device. Furthermore, the electronic device 1100 can also default that the OFDM symbols in the time slot are all used for downlink transmission so as to receive the data of the previous time slot on all OFDM symbols.

[0216] According to an embodiment of the present disclosure, the electronic device 1100 may store the data received in the previous time slot, and demodulate the data in the previous time slot according to the control information. For example, the electronic device 1100 may determine the time slot format of the data in the previous time slot according to the SFI in the control information, and determine the MCS level of the data in the previous time slot according to the MCS level in the control information, and then demodulate the data in the previous time slot.

[0217] Fig.14 1 is a diagram showing the signaling interaction of control information related to data in the previous time slot transmitted through GC-PDCCH according to an embodiment of the present disclosure. Fig.14 As shown, in step S1401, the base station sends the data in the previous time slot to the UE, and the UE receives and stores the data in the previous time slot. Next, in step S1402, the base station carries the control information related to the data in the previous time slot through the GC-PDCCH of the current time slot. Next, in step S1403, the UE demodulates the GC-PDCCH to obtain the control information related to the data in the previous time slot. Next, in step S1404, the UE demodulates the data in the previous time slot according to the control information.

[0218] According to an embodiment of the present disclosure, the electronic device 1100 may receive control information related to the data in the previous time slot through the GC-PDCCH in response to a notification received from the network side device. That is, when the network side device does not send control information related to the data in the previous time slot in the previous time slot, the control information related to the data in the previous time slot may be sent through the GC-PDCCH in the current time slot, and a notification may be sent to the electronic device 1100, so that the electronic device 1100 may receive control information related to the data in the previous time slot through the GC-PDCCH of the current time slot in response to such a notification. Further, the electronic device 1100 may receive such a notification from the network side device through the authorized spectrum. For example, the electronic device 1100 may receive such a notification from the network side device through the authorized spectrum through high-level signaling (including but not limited to RRC signaling) or low-level signaling (including but not limited to physical layer signaling).

[0219] Fig.15 1 is a signaling interaction diagram showing sending a notification to a user equipment so that the user equipment receives a GC-PDCCH in the next time slot according to an embodiment of the present disclosure. Fig.15 As shown, in step S1501, the base station sends the data in the previous time slot to the UE, and the UE receives and stores the data in the previous time slot. Next, in step S1502, the base station sends a notification to the UE to notify the UE to receive the GC-PDCCH in the next time slot of the previous time slot. Here, step S1501 and step S1502 can be exchanged, that is, the base station can send a notification to the UE as long as it finds that the control data of the previous time slot has not been sent. Next, in step S1503, the base station carries the control information related to the data in the previous time slot through the GC-PDCCH of the current time slot. Next, in step S1504, the UE demodulates the GC-PDCCH to obtain the control information related to the data in the previous time slot. Next, in step S1505, the UE demodulates the data in the previous time slot according to the control information.

[0220] According to an embodiment of the present disclosure, the electronic device 1100 may also receive control information related to the data in the previous time slot through the GC-PDCCH in the next time slot when the GC-PDCCH is not received in the previous time slot, and the GC-PDCCH should be sent in the previous time slot. That is, according to the transmission period of the GC-PDCCH set between the electronic device 1100 and the network side device, the GC-PDCCH should be sent in the previous time slot, and the electronic device 1100 does not receive the GC-PDCCH of the previous time slot. The electronic device 1100 can determine that the network side device did not send the GC-PDCCH of the previous time slot for some reason, and thus receives the GC-PDCCH in the current time slot, and temporarily ignores the transmission period of the GC-PDCCH. In this case, the electronic device 1100 does not need to receive a notification from the network side device.

[0221] According to an embodiment of the present disclosure, the communication unit 1120 may receive a configured or reconfigured GC-PDCCH transmission period from a network side device. Further, the communication unit 1120 may receive a configured or reconfigured GC-PDCCH transmission period from a network side device via an authorized spectrum. For example, the electronic device 1100 may receive a configured or reconfigured GC-PDCCH transmission period from a network side device via an authorized spectrum via high-layer signaling (including but not limited to RRC signaling) or low-layer signaling (including but not limited to physical layer signaling).

[0222] In addition, the demodulation unit 1110 may also demodulate the information received through the ePDCCH to obtain control information related to the data in the time slot where the ePDCCH is located.

[0223] As described above, according to an embodiment of the present disclosure, the electronic device 1100 can obtain control information related to the data in the previous time slot through the GC-PDCCH. In some cases, the electronic device 1100 does not receive control information related to the data in the previous time slot in the previous time slot, and therefore cannot decode this part of the data, resulting in a waste of resources. According to an embodiment of the present disclosure, the GC-PDCCH of the next time slot can be used to carry control information related to the data in the previous time slot, so that the electronic device 1100 can decode the data in the previous time slot, thereby improving the utilization rate of the channel.

[0224] It can be seen that according to the electronic device 1100 of the embodiment of the present disclosure, one or more of the following information can be received and demodulated through GC-PDCCH: information on the termination position of downlink transmission for unlicensed spectrum; length and time domain position information of MCOT of downlink transmission; information on whether a channel detection process needs to be performed before uplink transmission in the COT unit; parameter information of the channel detection process; and control information related to the data in the previous time slot of the time slot where the GC-PDCCH is located. For the information in the PDCCH public search area, the user equipment needs to attempt blind detection at two aggregation levels, while the GC-PDCCH only contains a search space of one aggregation level, thereby reducing the blind detection workload of the user equipment. Further, compared with carrying the above information through the PDCCH private search area, carrying the above information through the GC-PDCCH enables the user equipment to obtain the above information earlier, thereby preparing for uplink feedback or uplink data transmission. It can be seen that the present disclosure designs the GC-PDCCH more reasonably for the characteristics of the NR communication system.

[0225] <3.6 Receiving downlink transmission starting position>

[0226] According to an embodiment of the present disclosure, the communication unit 1120 can receive information on the starting position of downlink transmission for unlicensed spectrum, and the demodulation unit 1110 can demodulate the received information on the starting position of downlink transmission for unlicensed spectrum to obtain the starting position of downlink transmission for unlicensed spectrum.

[0227] According to an embodiment of the present disclosure, the electronic device 1100 may receive information on the starting position of downlink transmission for unlicensed spectrum through high-layer signaling, including but not limited to RRC signaling.

[0228] According to an embodiment of the present disclosure, the demodulation unit 1110 can demodulate the received information on the starting position of the downlink transmission for the unlicensed spectrum to obtain one or more of the following information: indication information of the subframe corresponding to the starting position of the downlink transmission, indication information of the time slot corresponding to the starting position of the downlink transmission, and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission.

[0229] According to an embodiment of the present disclosure, the demodulation unit 1110 may obtain one or more starting positions of downlink transmission for unlicensed spectrum.

[0230] According to an embodiment of the present disclosure, the shorter the length of the OFDM symbol included in the MCOT of the downlink transmission, that is, the larger the subcarrier spacing, the more starting positions of the downlink transmission for the unlicensed spectrum acquired by the demodulation unit 1110.

[0231] According to an embodiment of the present disclosure, the demodulation unit 1110 may obtain indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information may include the index of the OFDM symbol in the subframe. For example, the OFDM symbols in a subframe may be sorted and numbered according to the order in the time domain. After the demodulation unit 1110 obtains the index of the OFDM symbol corresponding to the starting position of the downlink transmission in the subframe, the position of the OFDM symbol corresponding to the starting position of the downlink transmission in the subframe may be determined according to the index.

[0232] According to an embodiment of the present disclosure, the demodulation unit 1110 may obtain indication information of the time slot corresponding to the starting position of the downlink transmission and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information may include the index of the time slot corresponding to the starting position of the downlink transmission in the subframe corresponding to the starting position of the downlink transmission and the index of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot corresponding to the starting position of the downlink transmission. For example, the time slots in a subframe may be sorted and numbered in the order in the time domain. When the demodulation unit 1110 obtains the index of the time slot corresponding to the starting position of the downlink transmission in the subframe, the position of the time slot corresponding to the starting position of the downlink transmission in the subframe may be determined according to the index. In addition, the OFDM symbols in a time slot may be sorted and numbered in the order in the time domain. When the demodulation unit 1110 obtains the index of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot, the position of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot corresponding to the starting position of the downlink transmission may be determined according to the index. Thus, the demodulation unit 1110 can determine the position of the time slot corresponding to the starting position of the downlink transmission and the position of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot corresponding to the starting position of the downlink transmission.

[0233] According to an embodiment of the present disclosure, the demodulation unit 1110 can obtain information on the type of the starting position of the downlink transmission for the unlicensed spectrum, such as obtaining an index of the type. Further, the demodulation unit 1110 can determine which one or more of the following information the starting position of the downlink transmission is located at based on the index: the boundary position of the subframe; the boundary position of the time slot; the middle position of the time slot. Specifically, the demodulation unit 1110 can determine whether the starting position of the downlink transmission is located at the boundary position of the subframe, the boundary position of the time slot, the boundary position of the subframe or the boundary position of the time slot, the boundary position of the time slot or the middle position of the time slot, or the boundary position of the subframe or the boundary position of the time slot or the middle position of the time slot.

[0234] As described above, according to the electronic device 1100 of the embodiment of the present disclosure, the starting position of the downlink transmission for the unlicensed spectrum can be obtained through, for example, high-layer signaling. In this way, compared with the LTE LAA (Licensed Assisted Access) system, the unlicensed frequency band in the NR communication system has more downlink transmission opportunities, which improves the utilization efficiency of the unlicensed spectrum.

[0235] According to an embodiment of the present disclosure, the electronic device 100 can be used as a network side device, and the electronic device 1100 can be used as a user device, that is, the electronic device 100 can provide services for the electronic device 1100, so all the embodiments of the electronic device 100 described in the foregoing are applicable hereto.

[0236] <4. Method Example>

[0237] Next, a wireless communication method performed by the electronic device 100 as a network side device in a wireless communication system according to an embodiment of the present disclosure will be described in detail.

[0238] Fig.16 1 is a flowchart illustrating a wireless communication method performed by the electronic device 100 as a network side device in a wireless communication system according to an embodiment of the present disclosure.

[0239] like Fig.16 As shown, in step S1610, the information of the downlink transmission termination position for the unlicensed spectrum is transmitted through the group common physical downlink control channel GC-PDCCH.

[0240] Preferably, the method further comprises: transmitting, through the GC-PDCCH, time slot format information SFI of the time slot where the downlink transmission termination position is located.

[0241] Preferably, the method further comprises: transmitting information on a downlink transmission termination position for the unlicensed spectrum via a physical downlink control channel PDCCH.

[0242] Preferably, the method further comprises: transmitting the downlink transmission termination position via the GC-PDCCH in the Nth time slot before the downlink transmission termination position, wherein N is a non-negative integer.

[0243] Preferably, the method further comprises: when N=0, transmitting the downlink transmission termination position via the GC-PDCCH in the time slot where the downlink transmission termination position is located.

[0244] Preferably, the method further comprises: determining the value of N according to one or more of the following parameters: the length of the maximum channel occupancy time MCOT of downlink transmission; the transmission period of GC-PDCCH; and the length of the OFDM symbol within the MCOT of downlink transmission.

[0245] Preferably, the method further comprises: transmitting the length and time domain position of the maximum channel occupancy time MCOT of downlink transmission through GC-PDCCH, wherein MCOT includes one or more time slots.

[0246] Preferably, the method further comprises: configuring the time slot format information SFI so that: the number of switching points between uplink transmission and downlink transmission included in each time slot in MCOT is not greater than 2; and / or the number of switching points between uplink transmission and downlink transmission included in MCOT is not greater than a predetermined threshold.

[0247] Preferably, the method further comprises: transmitting, through the GC-PDCCH, information on whether a channel detection process needs to be performed before uplink transmission in the time slot of the MCOT.

[0248] Preferably, the method further comprises: transmitting, through a physical downlink control channel PDCCH, information on whether a channel detection process needs to be performed before uplink transmission in a time slot of the MCOT.

[0249] Preferably, the method further comprises: transmitting, through the GC-PDCCH, parameter information about a channel detection process performed before uplink transmission in a time slot of the MCOT.

[0250] Preferably, the method further comprises: configuring information of a starting position of downlink transmission for the unlicensed spectrum, and sending information of a starting position of downlink transmission for the unlicensed spectrum.

[0251] Preferably, the method further comprises: carrying information of a starting position of downlink transmission for the unlicensed spectrum through high-layer signaling.

[0252] Preferably, the information on the starting position of the downlink transmission for the unlicensed spectrum includes one or more of the following: indication information of the subframe corresponding to the starting position of the downlink transmission, indication information of the time slot corresponding to the starting position of the downlink transmission, and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission.

[0253] Preferably, the information on the starting position of downlink transmission in the unlicensed spectrum includes one or more starting positions.

[0254] Preferably, the method further comprises: configuring information of a starting position of downlink transmission for the unlicensed spectrum according to the length of an OFDM symbol included in the MCOT of the downlink transmission (or the size of the subcarrier spacing).

[0255] Preferably, the method further comprises: when the length of the OFDM symbol included in the MCOT is smaller, that is, the subcarrier spacing is larger, more starting positions for downlink transmission of the unlicensed spectrum are configured.

[0256] Preferably, the information on the starting position of the downlink transmission of the unlicensed spectrum includes indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information may include an index of the OFDM symbol in a subframe.

[0257] Preferably, the starting position of downlink transmission for the unlicensed spectrum is located at the starting position and the middle position of a time slot.

[0258] Preferably, the information on the starting position of the downlink transmission for the unlicensed spectrum includes the indication information of the time slot corresponding to the starting position of the downlink transmission and the indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information may include the index of the time slot in the subframe and the index of the OFDM symbol in the time slot.

[0259] Preferably, the starting position of the downlink transmission for the unlicensed spectrum may include one or more of the following positions: a boundary position of a subframe; a boundary position of a time slot; and a middle position of a time slot.

[0260] Preferably, the starting position of the downlink transmission for the unlicensed spectrum may include information indicating the type of the starting position, and the types of starting positions include: the boundary position of a subframe; the boundary position of a time slot; the boundary position of a subframe or the boundary position of a time slot; the boundary position of a time slot or the middle position of a time slot; and the boundary position of a subframe or the boundary position of a time slot or the middle position of a time slot.

[0261] According to an embodiment of the present disclosure, the subject that executes the above method may be the electronic device 100 according to an embodiment of the present disclosure, and therefore all the embodiments regarding the electronic device 100 in the foregoing text are applicable hereto.

[0262] Fig.17 1 is a flowchart illustrating a wireless communication method performed by an electronic device 100 as a network side device in a wireless communication system according to another embodiment of the present disclosure.

[0263] like Fig.17 As shown, in step S1710, control information related to data in a time slot before the time slot where the GC-PDCCH is located is transmitted via the group common physical downlink control channel GC-PDCCH.

[0264] Preferably, the control information is used to indicate at least one of a modulation coding scheme MCS level of the data and time slot format information SFI of the data.

[0265] Preferably, the method further comprises: sending data in a time slot preceding the time slot where the GC-PDCCH is located according to default time slot format information SFI.

[0266] Preferably, the method further comprises: when control information related to data in the previous time slot is not transmitted in the previous time slot, transmitting control information related to data in the previous time slot through the GC-PDCCH.

[0267] Preferably, the method further comprises: sending a notification to the user equipment so that the user equipment receives control information related to the data in the previous time slot through the GC-PDCCH.

[0268] Preferably, the method further comprises: sending the notification to the user equipment via the authorized spectrum.

[0269] Preferably, the method further comprises: reconfiguring a transmission period of the GC-PDCCH to the user equipment.

[0270] Preferably, the method further comprises: sending the reconfigured GC-PDCCH transmission period to the user equipment via the authorized spectrum.

[0271] According to an embodiment of the present disclosure, the subject that executes the above method may be the electronic device 100 according to an embodiment of the present disclosure, and therefore all the embodiments regarding the electronic device 100 in the foregoing text are applicable hereto.

[0272] Next, a wireless communication method performed by the electronic device 1100 as a user equipment in a wireless communication system according to an embodiment of the present disclosure will be described in detail.

[0273] Fig.18 1 is a flowchart illustrating a wireless communication method performed by an electronic device 1100 as a user equipment in a wireless communication system according to an embodiment of the present disclosure.

[0274] like Fig.18 As shown, in step S1810, information is received through the group common physical downlink control channel GC-PDCCH.

[0275] Next, in step S1820, the information received through the GC-PDCCH is demodulated to obtain a downlink transmission termination position for the unlicensed spectrum.

[0276] Preferably, the method further comprises: demodulating the information received through the GC-PDCCH to obtain time slot format information SFI of the time slot where the downlink transmission termination position is located.

[0277] Preferably, the method further comprises: receiving information via a physical downlink control channel PDCCH; and demodulating the information received via the PDCCH to acquire a downlink transmission termination position for the unlicensed spectrum.

[0278] Preferably, the method also includes: when the downlink transmission termination position for the unlicensed spectrum obtained by demodulating the information received through GC-PDCCH conflicts with the downlink transmission termination position for the unlicensed spectrum obtained by demodulating the information received through PDCCH, the downlink transmission termination position for the unlicensed spectrum obtained by demodulating the information received through PDCCH shall prevail.

[0279] Preferably, the method further comprises: demodulating information received through the GC-PDCCH to obtain the length and time domain position of a maximum channel occupancy time MCOT for downlink transmission, wherein the MCOT includes one or more time slots.

[0280] Preferably, the method further comprises: demodulating information received via the GC-PDCCH to determine whether a channel detection process needs to be performed before uplink transmission in the time slot of the MCOT.

[0281] Preferably, the method further comprises: receiving information via a physical downlink control channel PDCCH; and demodulating the information received via the PDCCH to determine whether a channel detection process needs to be performed before uplink transmission in a time slot of the MCOT.

[0282] Preferably, the method also includes: when whether a channel detection process needs to be performed before uplink transmission in the time slot of MCOT as determined by demodulating information received through GC-PDCCH conflicts with whether a channel detection process needs to be performed before uplink transmission in the time slot of MCOT as determined by demodulating information received through PDCCH, whether a channel detection process needs to be performed before uplink transmission in the time slot of MCOT as determined by demodulating information received through PDCCH shall prevail.

[0283] Preferably, the method further comprises: demodulating information received via the GC-PDCCH to obtain parameters of a channel detection process performed before uplink transmission in a time slot of the MCOT.

[0284] Preferably, the method further includes: receiving information on the starting position of downlink transmission for unlicensed spectrum, and demodulating the received information on the starting position of downlink transmission for unlicensed spectrum to obtain the starting position of downlink transmission for unlicensed spectrum.

[0285] Preferably, the information on the starting position of the downlink transmission for the unlicensed spectrum is received through high-layer signaling.

[0286] Preferably, the method also includes: demodulating the received information on the starting position of the downlink transmission for the unlicensed spectrum to obtain one or more of the following information: indication information of the subframe corresponding to the starting position of the downlink transmission, indication information of the time slot corresponding to the starting position of the downlink transmission, and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission.

[0287] Preferably, the method further comprises: the acquired starting position of the downlink transmission for the unlicensed spectrum comprises one or more starting positions of the downlink transmission for the unlicensed spectrum.

[0288] Preferably, the shorter the length of the OFDM symbol included in the MCOT of the downlink transmission, that is, the larger the subcarrier spacing, the more starting positions of the downlink transmission for the unlicensed spectrum are obtained.

[0289] Preferably, the method further comprises: obtaining indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information comprises an index of the OFDM symbol in the subframe.

[0290] Preferably, the method further comprises: determining the position of the OFDM symbol corresponding to the starting position of the downlink transmission in the subframe according to the index of the OFDM symbol in the subframe.

[0291] Preferably, the method further includes: obtaining indication information of the time slot corresponding to the starting position of the downlink transmission and indication information of the OFDM symbol corresponding to the starting position of the downlink transmission. Specifically, the indication information includes the index of the time slot corresponding to the starting position of the downlink transmission in the subframe corresponding to the starting position of the downlink transmission and the index of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot corresponding to the starting position of the downlink transmission.

[0292] Preferably, the method also includes: determining the position of the time slot corresponding to the starting position of the downlink transmission in the subframe according to the index of the time slot corresponding to the starting position of the downlink transmission in the subframe; and determining the position of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot corresponding to the starting position of the downlink transmission according to the index of the OFDM symbol corresponding to the starting position of the downlink transmission in the time slot.

[0293] Preferably, the method further includes: obtaining information on the type of the starting position of the downlink transmission for the unlicensed spectrum; and determining, based on the type information, which of the following positions or positions the starting position of the downlink transmission is located at: a boundary position of a subframe; a boundary position of a time slot; a middle position of a time slot. Specifically, the method may further include: determining, based on the type information, whether the starting position of the downlink transmission is located at a boundary position of a subframe, a boundary position of a time slot, a boundary position of a subframe or a boundary position of a time slot, a boundary position of a time slot or a middle position of a time slot, or a boundary position of a subframe or a boundary position of a time slot or a middle position of a time slot.

[0294] According to an embodiment of the present disclosure, the subject that executes the above method may be the electronic device 1100 according to an embodiment of the present disclosure, and therefore all the embodiments of the electronic device 1100 in the foregoing text are applicable hereto.

[0295] Fig.19 1 is a flowchart illustrating a wireless communication method performed by an electronic device 1100 as a user equipment in a wireless communication system according to another embodiment of the present disclosure.

[0296] like Fig.19 As shown, in step S1910, information is received through the group common physical downlink control channel GC-PDCCH.

[0297] Next, in step S1920, the information is demodulated to obtain control information related to data in a time slot before the time slot where the GC-PDCCH is located.

[0298] Preferably, the method further comprises: determining at least one of a modulation coding scheme MCS level of the data and time slot format information SFI of the data according to the control information.

[0299] Preferably, the method further comprises: storing data received in a previous time slot; and demodulating the data in the previous time slot according to the control information.

[0300] Preferably, the method further comprises: receiving data in a time slot preceding the time slot where the GC-PDCCH is located according to default time slot format information SFI.

[0301] Preferably, the method further comprises: receiving control information related to data in a previous time slot through the GC-PDCCH in response to a notification received from the network side device.

[0302] Preferably, the method further comprises: receiving a notification from a network-side device via an authorized spectrum.

[0303] Preferably, the method further comprises: receiving a reconfigured GC-PDCCH transmission period from a network side device.

[0304] Preferably, the method further comprises: receiving a reconfigured GC-PDCCH transmission period from a network side device via an authorized spectrum.

[0305] According to an embodiment of the present disclosure, the subject that executes the above method may be the electronic device 1100 according to an embodiment of the present disclosure, and therefore all the embodiments of the electronic device 1100 in the foregoing text are applicable hereto.

[0306] <5. Application Examples>

[0307] The technology of the present disclosure can be applied to various products.

[0308] The network side device can 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.

[0309] 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.

[0310] [Application examples for base stations]

[0311] (First application example)

[0312] Fig. 20 2000 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 2000 includes one or more antennas 2010 and a base station device 2020. The base station device 2020 and each antenna 2010 may be connected to each other via an RF cable.

[0313] Each of the antennas 2010 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 2020 to transmit and receive wireless signals. Fig. 20 As shown, the eNB 2000 may include multiple antennas 2010. For example, the multiple antennas 2010 may be compatible with multiple frequency bands used by the eNB 2000. Fig. 20 An example is shown in which the eNB 2000 includes a plurality of antennas 2010 , but the eNB 2000 may also include a single antenna 2010 .

[0314] The base station device 2020 includes a controller 2021 , a memory 2022 , a network interface 2023 , and a wireless communication interface 2025 .

[0315] The controller 2021 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 2020. For example, the controller 2021 generates a data packet based on the data in the signal processed by the wireless communication interface 2025, and transmits the generated packet via the network interface 2023. The controller 2021 may bundle data from a plurality of baseband processors to generate a bundled packet, and transmit the generated bundled packet. The controller 2021 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 2022 includes a RAM and a ROM, and stores programs executed by the controller 2021 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

[0316] The network interface 2023 is a communication interface for connecting the base station device 2020 to the core network 2024. The controller 2021 can communicate with the core network node or another eNB via the network interface 2023. In this case, the eNB 2000 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 2023 can also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 2023 is a wireless communication interface, the network interface 2023 can use a higher frequency band for wireless communication compared to the frequency band used by the wireless communication interface 2025.

[0317] The wireless communication interface 2025 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 2000 via the antenna 2010. The wireless communication interface 2025 may generally include, for example, a baseband (BB) processor 2026 and an RF circuit 2027. The BB processor 2026 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 2021, the BB processor 2026 may have a part or all of the above-mentioned logical functions. The BB processor 2026 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 2026. The module may be a card or a blade inserted into a slot of the base station device 2020. Alternatively, the module may also be a chip mounted on a card or a blade. Meanwhile, the RF circuit 2027 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2010 .

[0318] like Fig. 20 As shown, the wireless communication interface 2025 may include multiple BB processors 2026. For example, the multiple BB processors 2026 may be compatible with multiple frequency bands used by the eNB 2000. Fig. 20 As shown, the wireless communication interface 2025 may include multiple RF circuits 2027. For example, the multiple RF circuits 2027 may be compatible with multiple antenna elements. Fig. 20 An example is shown in which the wireless communication interface 2025 includes a plurality of BB processors 2026 and a plurality of RF circuits 2027 , but the wireless communication interface 2025 may also include a single BB processor 2026 or a single RF circuit 2027 .

[0319] (Second application example)

[0320] Fig.21 21 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 2130 includes one or more antennas 2140, a base station device 2150, and an RRH 2160. The RRH 2160 and each antenna 2140 can be connected to each other via an RF cable. The base station device 2150 and the RRH 2160 can be connected to each other via a high-speed line such as an optical fiber cable.

[0321] Each of the antennas 2140 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 2160 to transmit and receive wireless signals. Fig.21 As shown, the eNB 2130 may include multiple antennas 2140. For example, the multiple antennas 2140 may be compatible with multiple frequency bands used by the eNB 2130. Fig.21 An example is shown in which the eNB 2130 includes a plurality of antennas 2140 , but the eNB 2130 may also include a single antenna 2140 .

[0322] The base station device 2150 includes a controller 2151, a memory 2152, a network interface 2153, a wireless communication interface 2155, and a connection interface 2157. The controller 2151, the memory 2152, and the network interface 2153 are similar to the reference Fig. 20 The controller 2021, memory 2022 and network interface 2023 described are the same.

[0323] The wireless communication interface 2155 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 2160 via the RRH 2160 and the antenna 2140. The wireless communication interface 2155 may generally include, for example, a BB processor 2156. In addition to the BB processor 2156 being connected to the RF circuit 2164 of the RRH 2160 via the connection interface 2157, the BB processor 2156 is connected to the reference RF circuit 2164 of the RRH 2160. Fig. 20 The same as the BB processor 2026 described above. Fig.21 As shown, the wireless communication interface 2155 may include multiple BB processors 2156. For example, the multiple BB processors 2156 may be compatible with multiple frequency bands used by the eNB 2130. Fig.21 An example is shown in which the wireless communication interface 2155 includes a plurality of BB processors 2156 , but the wireless communication interface 2155 may also include a single BB processor 2156 .

[0324] The connection interface 2157 is an interface for connecting the base station device 2150 (wireless communication interface 2155) to the RRH 2160. The connection interface 2157 may also be a communication module for connecting the base station device 2150 (wireless communication interface 2155) to the RRH 2160 for communication in the above-mentioned high-speed line.

[0325] The RRH 2160 includes a connection interface 2161 and a wireless communication interface 1963 .

[0326] The connection interface 2161 is an interface for connecting the RRH 2160 (wireless communication interface 1963) to the base station device 2150. The connection interface 2161 may also be a communication module for communication in the above-mentioned high-speed line.

[0327] The wireless communication interface 2163 transmits and receives wireless signals via the antenna 2140. The wireless communication interface 2163 may generally include, for example, an RF circuit 2164. The RF circuit 2164 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2140. Fig.21 As shown, the wireless communication interface 2163 may include multiple RF circuits 2164. For example, the multiple RF circuits 2164 may support multiple antenna elements. Fig.21 An example is shown in which the wireless communication interface 2163 includes a plurality of RF circuits 2164 , but the wireless communication interface 2163 may also include a single RF circuit 2164 .

[0328] exist Fig. 20 and Fig.21 In the eNB 2000 and eNB 2130 shown in FIG. Figure 1 The configuration unit 110 described may be implemented by the controller 2021 and / or the controller 2151. At least a portion of the functions may also be implemented by the controller 2021 and the controller 2151. For example, the controller 2021 and / or the controller 2151 may perform the functions of configuring the GC-PDCCH and the PDCCH by executing instructions stored in the corresponding memory.

[0329] [Application examples for terminal devices]

[0330] (First application example)

[0331] Fig. 22 2 is a block diagram showing an example of a schematic configuration of a smartphone 2200 to which the technology of the present disclosure can be applied. The smartphone 2200 includes a processor 2201, a memory 2202, a storage device 2203, an external connection interface 2204, a camera 2206, a sensor 2207, a microphone 2208, an input device 2209, a display device 2210, a speaker 2211, a wireless communication interface 2212, one or more antenna switches 2215, one or more antennas 2216, a bus 2217, a battery 2218, and an auxiliary controller 2219.

[0332] The processor 2201 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 2200. The memory 2202 includes a RAM and a ROM, and stores data and programs executed by the processor 2201. The storage device 2203 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 2204 is an interface for connecting an external device (such as a memory card and a universal serial bus (USB) device) to the smartphone 2200.

[0333] The camera 2206 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 2207 may include a group of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 2208 converts the sound input to the smart phone 2200 into an audio signal. The input device 2209 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 2210, and receives an operation or information input from a user. The display device 2210 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 2200. The speaker 2211 converts the audio signal output from the smart phone 2200 into sound.

[0334] The wireless communication interface 2212 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 2212 may generally include, for example, a BB processor 2213 and an RF circuit 2214. The BB processor 2213 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 2214 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 2216. The wireless communication interface 2212 may be a chip module on which the BB processor 2213 and the RF circuit 2214 are integrated. Fig. 22 As shown, the wireless communication interface 2212 may include multiple BB processors 2213 and multiple RF circuits 2214. Fig. 22 An example is shown in which the wireless communication interface 2212 includes a plurality of BB processors 2213 and a plurality of RF circuits 2214 , but the wireless communication interface 2212 may also include a single BB processor 2213 or a single RF circuit 2214 .

[0335] In addition, in addition to the cellular communication scheme, the wireless communication interface 2212 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 2212 can include a BB processor 2213 and an RF circuit 2214 for each wireless communication scheme.

[0336] Each of the antenna switches 2215 switches a connection destination of the antenna 2216 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 2212 .

[0337] Each of the antennas 2216 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 2212 to transmit and receive wireless signals. Fig. 22 As shown, the smart phone 2200 may include multiple antennas 2216. Fig. 22 An example is shown in which the smart phone 2200 includes a plurality of antennas 2216 , but the smart phone 2200 may also include a single antenna 2216 .

[0338] In addition, the smartphone 2200 may include an antenna 2216 for each wireless communication scheme. In this case, the antenna switch 2215 may be omitted from the configuration of the smartphone 2200.

[0339] The bus 2217 connects the processor 2201, the memory 2202, the storage device 2203, the external connection interface 2204, the camera 2206, the sensor 2207, the microphone 2208, the input device 2209, the display device 2210, the speaker 2211, the wireless communication interface 2212, and the auxiliary controller 2219 to each other. The battery 2218 is fed to the Fig. 22 The various blocks of the smartphone 2200 shown are supplied with power, the feed lines being partially shown as dashed lines in the figure. The auxiliary controller 2219 operates the minimum necessary functions of the smartphone 2200, for example in a sleep mode.

[0340] exist Fig. 22 In the smart phone 2200 shown, by using Fig.11 The demodulation unit 1110 described may be implemented by the processor 2201 or the auxiliary controller 2219. At least a portion of the functions may also be implemented by the processor 2201 or the auxiliary controller 2219. For example, the processor 2201 or the auxiliary controller 2219 may perform the function of demodulating downlink information by executing instructions stored in the memory 2202 or the storage device 2203.

[0341] (Second application example)

[0342] Fig.23 23 is a block diagram showing an example of a schematic configuration of a car navigation device 2320 to which the technology of the present disclosure can be applied. The car navigation device 2320 includes a processor 2321, a memory 2322, a global positioning system (GPS) module 2324, a sensor 2325, a data interface 2326, a content player 2327, a storage medium interface 2328, an input device 2329, a display device 2330, a speaker 2331, a wireless communication interface 2333, one or more antenna switches 2336, one or more antennas 2337, and a battery 2338.

[0343] The processor 2321 may be, for example, a CPU or a SoC, and controls a navigation function and other functions of the car navigation device 2320. The memory 2322 includes a RAM and a ROM, and stores data and a program executed by the processor 2321.

[0344] The GPS module 2324 measures the position (such as latitude, longitude and altitude) of the car navigation device 2320 using GPS signals received from GPS satellites. The sensor 2325 may include a group of sensors such as a gyro sensor, a geomagnetic sensor and an air pressure sensor. The data interface 2326 is connected to, for example, the vehicle network 2341 via an unshown terminal and acquires data (such as vehicle speed data) generated by the vehicle.

[0345] The content player 2327 reproduces the content stored in a storage medium such as a CD and a DVD, which is inserted into the storage medium interface 2328. The input device 2329 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 2330, and receives an operation or information input from a user. The display device 2330 includes a screen such as an LCD or an OLED display, and displays an image of a navigation function or reproduced content. The speaker 2331 outputs the sound of the navigation function or the reproduced content.

[0346] The wireless communication interface 2333 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 2333 may generally include, for example, a BB processor 2334 and an RF circuit 2335. The BB processor 2334 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 2335 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 2337. The wireless communication interface 2333 may also be a chip module on which the BB processor 2334 and the RF circuit 2335 are integrated. Fig.23As shown, the wireless communication interface 2333 may include multiple BB processors 2334 and multiple RF circuits 2335. Fig.23 An example is shown in which the wireless communication interface 2333 includes a plurality of BB processors 2334 and a plurality of RF circuits 2335 , but the wireless communication interface 2333 may also include a single BB processor 2334 or a single RF circuit 2335 .

[0347] In addition, in addition to the cellular communication scheme, the wireless communication interface 2333 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 2333 can include a BB processor 2334 and an RF circuit 2335.

[0348] Each of the antenna switches 2336 switches a connection destination of the antenna 2337 between a plurality of circuits included in the wireless communication interface 2333 , such as circuits for different wireless communication schemes.

[0349] Each of the antennas 2337 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 2333 to transmit and receive wireless signals. Fig.23 As shown, the car navigation device 2320 may include multiple antennas 2337. Fig.23 An example is shown in which the car navigation device 2320 includes a plurality of antennas 2337 , but the car navigation device 2320 may also include a single antenna 2337 .

[0350] In addition, the car navigation device 2320 may include an antenna 2337 for each wireless communication scheme. In this case, the antenna switch 2336 may be omitted from the configuration of the car navigation device 2320.

[0351] Battery 2338 is fed via a feeder Fig.23 The respective blocks of the illustrated car navigation device 2320 are supplied with electric power, and feed lines are partially illustrated as dotted lines in the figure. The battery 2338 accumulates electric power supplied from the vehicle.

[0352] exist Fig.23 In the car navigation device 2320 shown, by using Fig.11 The demodulation unit 1110 described may be implemented by the processor 2321. At least a part of the functions may also be implemented by the processor 2321. For example, the processor 2321 may perform the function of demodulating downlink information by executing instructions stored in the memory 2322.

[0353] The technology of the present disclosure may also be implemented as an in-vehicle system (or vehicle) 2340 including a car navigation device 2320, an in-vehicle network 2341, and one or more blocks in a vehicle module 2342. The vehicle module 2342 generates vehicle data (such as vehicle speed, engine speed, and fault information), and outputs the generated data to the in-vehicle network 2341.

[0354] 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.

[0355] 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.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] Additionally, the present technology may also be configured as follows.

[0360] (1) An electronic device comprising a processing circuit configured to:

[0361] The group common physical downlink control channel GC-PDCCH is used to transmit control information related to data in a time slot preceding the time slot where the GC-PDCCH is located.

[0362] (2) The electronic device according to (1), wherein the control information is used to indicate at least one of a modulation coding scheme (MCS) level of the data and slot format information (SFI) of the data.

[0363] (3) The electronic device according to (1), wherein the processing circuit is further configured to:

[0364] The data in the time slot before the time slot where the GC-PDCCH is located is sent according to the default time slot format information SFI.

[0365] (4) The electronic device according to (1), wherein the processing circuit is further configured to:

[0366] When control information associated with the data in the previous time slot is not transmitted in the previous time slot, control information associated with the data in the previous time slot is transmitted through the GC-PDCCH.

[0367] (5) The electronic device according to (1), wherein the processing circuit is further configured to:

[0368] A notification is sent to the user equipment so that the user equipment receives control information related to the data in the previous time slot through the GC-PDCCH.

[0369] (6) The electronic device according to (5), wherein the processing circuit is further configured to:

[0370] The notification is sent to the user equipment through an authorized spectrum.

[0371] (7) The electronic device according to (1), wherein the processing circuit is further configured to:

[0372] The transmission period of the GC-PDCCH is reconfigured for the user equipment.

[0373] (8) The electronic device according to (7), wherein the processing circuit is further configured to:

[0374] The reconfigured GC-PDCCH transmission period is sent to the user equipment through the authorized spectrum.

[0375] (9) The electronic device according to any one of (1) to (8), wherein the electronic device is a network side device in a new wireless NR communication system.

[0376] (10) An electronic device comprising a processing circuit configured to:

[0377] receiving information via a group common physical downlink control channel GC-PDCCH; and

[0378] The information is demodulated to obtain control information related to data in a time slot previous to the time slot where the GC-PDCCH is located.

[0379] (11) The electronic device according to (10), wherein the processing circuit is further configured to:

[0380] At least one of a modulation coding scheme MCS level of the data and time slot format information SFI of the data is determined according to the control information.

[0381] (12) The electronic device according to (10), wherein the processing circuit is further configured to:

[0382] storing data received in the previous time slot; and

[0383] The data in the previous time slot is demodulated according to the control information.

[0384] (13) The electronic device according to (10), wherein the processing circuit is further configured to:

[0385] Data in a time slot preceding the time slot where the GC-PDCCH is located is received according to the default time slot format information SFI.

[0386] (14) The electronic device according to (10), wherein the processing circuit is further configured to:

[0387] In response to the notification received from the network side device, control information related to the data in the previous time slot is received through the GC-PDCCH.

[0388] (15) The electronic device according to (14), wherein the processing circuit is further configured to:

[0389] The notification is received from the network side device through the authorized spectrum.

[0390] (16) The electronic device according to (10), wherein the processing circuit is further configured to:

[0391] The reconfigured GC-PDCCH transmission period is received from the network side device.

[0392] (17) The electronic device according to (16), wherein the processing circuit is further configured to:

[0393] The reconfigured GC-PDCCH transmission period is received from the network side device through the authorized spectrum.

[0394] (18) An electronic device according to any one of (10) to (17), wherein the electronic device is a user-side device in a new wireless NR communication system.

[0395] (19) A wireless communication method, comprising:

[0396] The group common physical downlink control channel GC-PDCCH is used to transmit control information related to data in a time slot preceding a time slot where the GC-PDCCH is located.

[0397] (20) A wireless communication method, comprising:

[0398] receiving information via a group common physical downlink control channel GC-PDCCH; and

[0399] The information is demodulated to obtain control information related to data in a time slot previous to the time slot where the GC-PDCCH is located.

[0400] (21) 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 (19) or (20).

Claims

1. An electronic device operating in a base station and comprising a processing circuit, wherein: Sending data in a time slot before a time slot in which a group common physical downlink control channel GC-PDCCH is to be sent; transmitting control information related to the data in the previous time slot through the GC-PDCCH in the time slot; and sending information on a downlink transmission termination position for an unlicensed spectrum through the GC-PDCCH in a third time slot different from both the previous time slot and the time slot, in, The downlink transmission termination position is directly indicated in the GC-PDCCH, or is determined according to the time slot format information included in the GC-PDCCH, and The processing circuit sends data in a time slot preceding the time slot where the GC-PDCCH is located according to a default time slot format.

2. The electronic device according to claim 1, wherein: The control information is used to indicate at least one of a modulation and coding scheme MCS level of the data or time slot format related information SFI of the data.

3. The electronic device according to claim 1, wherein: The processing circuit sends, via the GC-PDCCH, time slot format related information SFI of the third time slot indicating the downlink transmission termination position.

4. The electronic device according to claim 1, wherein: When control information related to the data in the previous time slot is not transmitted in the previous time slot, the processing circuit transmits control information related to the data in the previous time slot through the GC-PDCCH.

5. The electronic device according to claim 1, wherein: The processing circuit sends a notification to a user equipment so that the user equipment receives control information related to the data in the previous time slot through the GC-PDCCH.

6. The electronic device according to claim 5, wherein: The processing circuit sends the notification to the user equipment via a licensed spectrum.

7. The electronic device according to claim 1, wherein: The processing circuit reconfigures the transmission period of the GC-PDCCH to the user equipment.

8. The electronic device according to claim 7, wherein: The processing circuit sends the reconfigured transmission period of the GC-PDCCH to the user equipment through the authorized spectrum.

9. The electronic device according to claim 1, wherein: The electronic device is a network side device in the new wireless NR communication system.

10. An electronic device operating in a mobile device and comprising a processing circuit, the processing circuit: receiving data in a time slot preceding a time slot in which a group common physical downlink control channel GC-PDCCH is to be received from a base station; receiving control information related to data in the previous time slot through the GC-PDCCH in the time slot; and receiving information on a downlink transmission termination position for an unlicensed spectrum through the GC-PDCCH in a third time slot different from both the previous time slot and the time slot, in, The downlink transmission termination position is directly indicated in the GC-PDCCH, or is determined according to the time slot format information included in the GC-PDCCH, and The processing circuit receives data in a time slot preceding the time slot where the GC-PDCCH is located according to a default time slot format.

11. The electronic device according to claim 10, wherein: The processing circuit determines at least one of a modulation and coding scheme MCS level of the data or slot format related information SFI of the data based on the control information.

12. The electronic device according to claim 10, wherein: The processing circuit: storing data received in the previous time slot; and The data in the previous time slot is demodulated according to the control information.

13. The electronic device according to claim 10, wherein: The processing circuit receives, through the GC-PDCCH, time slot format related information SFI of the third time slot where the downlink transmission termination position is located.

14. The electronic device according to claim 10, wherein: The processing circuit receives control information related to the data in the previous time slot through the GC-PDCCH in response to the notification received from the network side device.

15. The electronic device according to claim 14, wherein: The processing circuit receives the notification from the network side device through the authorized spectrum.

16. The electronic device according to claim 10, wherein: The processing circuit receives the reconfigured transmission period of the GC-PDCCH from a network side device.

17. The electronic device according to claim 16, wherein: The processing circuit receives the reconfigured transmission period of the GC-PDCCH from the network side device through the authorized spectrum.

18. The electronic device according to claim 10, wherein: The electronic device is a user-side device in a new wireless NR communication system.

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