A method and apparatus used in a node for wireless communication

Abstract

The application discloses a method and device used in a node for wireless communication. A first node receives a first information block, monitors a second information block and monitors Q1 control channel alternatives. Wherein, the first information block is used to determine a first control channel alternative set; the first control channel alternative set occupies a first time-frequency resource set; the first time-frequency resource set belongs to a first time window in the time domain; the time length of the first time window is one of Q2 time window length alternatives; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length alternatives; the Q1 control channel alternatives all belong to the first control channel alternative set, Q1 is not greater than a maximum monitoring number, the maximum monitoring number is a positive integer; the time length of the first time window is used to determine the maximum monitoring number. Through the method in the application, a better compromise can be achieved between the control channel monitoring period and the blind detection number.

Description

TECHNICAL FIELD

[0001] The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly, to a transmission scheme and apparatus of a control channel in a wireless communication. BACKGROUND

[0002] The application scenarios of future wireless communication systems are increasingly diversified, and different application scenarios have different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, it is decided at the 3GPP (3rd Generation Partnership Project) RAN (Radio Access Network) #72 plenary meeting to study the New Radio (NR) (or 5G). At the 3GPP RAN #75 plenary meeting, the WI (Work Item) of New Radio (NR) was passed, and the standardization work of NR began.

[0003] In the New Radio technology, one important issue is to extend NR to higher frequency spectrum. In order to be able to adapt to more diverse application scenarios and meet higher requirements, at the 3GPP RAN #86 plenary meeting, the WI of extending the NR system to the frequency spectrum between 52.6GHz and 71GHz was passed. In order to support larger bandwidth and counter more serious phase noise, larger subcarrier spacing will be supported at 52.6GHz and 71GHz, such as 480KHz and 960KHz. In this case, the length of the OFDM (Orthogonal Frequency Diveded Multiplexing) symbol will become shorter relative to the subcarrier spacing of 120KHz or less, and accordingly, the slot interval will also become shorter.

[0004] In the NR system, a UE (User Equipment) is configured with one or more user-specific search space sets (USS set) and common search space sets (CSS set). Each user-specific search space set or common search space set includes a set of PDCCH (Physical Downlink Control Channel) candidates. The UE needs to perform blind decoding (BD) on the user-specific search space set or the common search space set to determine whether there is a PDCCH sent to itself.

[0005] In conventional cellular systems, data transmission can only occur on licensed spectrum. However, as the traffic volume increases dramatically, especially in some urban areas, the licensed spectrum can be difficult to meet the demand of traffic volume. 3GPP Release 17 will consider extending the application of NR to unlicensed spectrum above 52.6GHz. In order to ensure compatibility with other access technologies on unlicensed spectrum, LBT (Listen Before Talk) technology is used to avoid interference caused by multiple transmitters occupying the same frequency resource at the same time. Cat 2 (Category 2) LBT and Cat 4 (Category 4) LBT are two commonly used LBTs. In 3GPP specifications, Cat 4 LBT is used for downlink, also known as Type 1 downlink channel access procedure; Cat 4 LBT is used for uplink, also known as Type 1 uplink channel access procedure; Cat 2 LBT is used for downlink, also known as Type 2 downlink channel access procedure; Cat 2 LBT is used for uplink, also known as Type 2 uplink channel access procedure. For specific definitions, please refer to 3gpp TS 37.213. Cat 4 LBT in this application is also used to represent Type 1 downlink channel access procedure or Type 1 uplink channel access procedure. Cat 2 LBT in this application is also used to represent Type 2 downlink channel access procedure or Type 2 uplink channel access procedure.

[0006] In NR Rel. 16, after LBT succeeds, gNB or UE can occupy the channel for a period of time, which is called Channel Occupancy Time (COT). NR Rel. 16 supports shared COT, that is, the COT obtained by gNB through LBT can be shared with UE for transmitting signals, and the COT obtained by UE through LBT can be shared with gNB for transmitting signals. Within the shared COT, gNB and UE can not perform LBT or perform Cat 2 LBT before transmitting signals, without performing Cat 4 LBT. SUMMARY

[0007] The inventors have found that, for gNB-acquired COT, in order to enable the gNB to start occupying the COT in time after LBT success, the monitoring period of the downlink control channel can be configured to be short, for example, can be configured to one slot, so that the gNB can start occupying the COT within a time of at most one slot after LBT success. However, for unlicensed frequency bands above 52.6GHz, using a larger subcarrier spacing will make the OFDM symbol length and the slot length shorter, so the number of PDCCH blind detections that a UE can support in one slot will become less, and if the detection period of the PDCCH is configured to be 1 slot, the transmission and monitoring of the PDCCH will be limited by the less number of blind detections of the UE. Therefore, how to handle the contradiction between the shorter PDCCH monitoring period and the less number of PDCCH blind detections is a problem to be solved.

[0008] To solve the above problem, a solution is disclosed in the present application. It should be noted that, although the above description uses the scenario of air interface transmission between gNB (next generation Node B) and UE (User Equipment) in unlicensed frequency spectrum as an example in the description of the present application, the present application is also applicable to other communication scenarios (such as wireless local area network scenarios, sidelink transmission scenarios between user equipment, licensed frequency spectrum scenarios, etc.), and achieves similar technical effects. In addition, using a unified solution in different scenarios (including but not limited to cellular network, wireless local area network, sidelink transmission, licensed frequency spectrum, etc.) also helps to reduce hardware complexity and cost. In the case of no conflict, the embodiments in the first node and the features in the embodiments can be applied to the second node, and vice versa. In the case of no conflict, the embodiments and the features in the embodiments can be arbitrarily combined with each other.

[0009] As an embodiment, the explanation of the terminology in the present application is based on the definition of the specification agreement TS36 series of 3GPP.

[0010] As an embodiment, the explanation of the terminology in the present application is based on the definition of the specification agreement TS38 series of 3GPP.

[0011] As an embodiment, the explanation of the terminology in the present application is based on the definition of the specification agreement TS37 series of 3GPP.

[0012] As an embodiment, the explanation of the terminology in the present application is based on the definition of the specification agreement of IEEE (Institute of Electrical and Electronics Engineers).

[0013] A method in a first node for wireless communication is disclosed, comprising:

[0014] receiving a first information block and monitoring a second information block;

[0015] monitoring Q1 control channel candidates, Q1 being a positive integer greater than 1;

[0016] wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised in the first time-frequency resource set belong to a first time window in time domain; the time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0017] As an embodiment, the above method is characterized in that the maximum monitoring number is a PDCCH maximum blind detection number in the first time window. In the case that the processing capability of the first node is unchanged, the longer the first time window is, the more the maximum detection number is; the shorter the first time window is, the less the maximum detection number is.

[0018] As an embodiment, the above method is characterized in that the transmission of the second information block is used to determine that the current time is located within a COT, i.e., when the first node detects the second information block, the first node judges that the time at which the second information block is received is located within a COT.

[0019] As an embodiment, the above method is characterized in that different lengths of the first time window can be used within and outside the COT. Typically, the first time window outside the COT is shorter, corresponding to a shorter PDCCH monitoring period but a smaller number of PDCCH blind detections, which is beneficial to quickly detecting the starting position of the COT; the first time window within the COT is longer, corresponding to a longer PDCCH monitoring period but a larger number of PDCCH blind detections, which is beneficial to enhancing the flexibility of PDCCH scheduling.

[0020] As an embodiment, the above method has the advantage that, by triggering the switching of the time length of the first time window by whether the second information block is detected or not, compared with explicitly signaling, the overhead can be saved and the latency can be reduced.

[0021] According to an aspect of the present application, the above method is characterized in that the second information block is used to determine the time length of a Channel Occupancy Time (COT).

[0022] According to an aspect of the present application, the above method is characterized in that the first information block is used to determine Q3 search space sets, Q3 being a positive integer, any search space set of the Q3 search space sets including at least one control channel candidate; the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, Q4 being a positive integer not greater than Q3; any control channel candidate of the Q1 control channel candidates belonging to one of the Q4 search space sets.

[0023] According to an aspect of the present application, the above method is characterized in that the first time-frequency resource set includes a plurality of time-frequency resource subsets, any time-frequency resource subset of the plurality of time-frequency resource subsets being associated to at least one control channel candidate, the order of the starting time of the plurality of time-frequency resource subsets being used to determine the Q1 control channel candidates from the first control channel candidate set.

[0024] As an embodiment, the above method has the advantage that, when PDCCH overbooking occurs (i.e. the number of PDCCH blind detections required exceeds the maximum blind detection number), the PDCCH is dropped according to the time order, so that the first node does not need to perform blind detection on the PDCCH at the later time, which is beneficial to the energy saving of the first node.

[0025] According to an aspect of the present application, the above method is characterized in that, if the second information block is not detected, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate being one of the Q2 time window length candidates, the Q3 search space sets indicated by the first information block being used to determine the first time window length candidate.

[0026] According to an aspect of the present application, the above method is characterized in that it comprises:

[0027] The first receiver receives a third information block, the third information block being used to determine a second time window length candidate, the second time window length candidate being one of the Q2 time window length candidates; and if the second information block is detected, the time length of the first time window is equal to the second time window length candidate.

[0028] According to an aspect of the present application, the above method is characterized in that if the second information block is detected, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

[0029] The present application discloses a method in a second node for wireless communication, characterized in that comprising:

[0030] receiving a first information block and determining a second information block;

[0031] determining Q1 control channel candidates, the Q1 being a positive integer greater than 1;

[0032] wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised in the first time-frequency resource set belong to a first time window in time domain; the time length of the first time window is one of Q2 time window length candidates, the Q2 being a positive integer greater than 1; whether the second information block is transmitted is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, the Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0033] According to an aspect of the present application, the above method is characterized in that the second information block is used to determine a time length of a Channel Occupancy Time (COT).

[0034] According to an aspect of the present application, the above method is characterized in that the first information block is used to determine Q3 search space sets, the Q3 being a positive integer, any one of the Q3 search space sets comprising at least one control channel candidate; the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, the Q4 being a positive integer not greater than Q3; any one of the Q1 control channel candidates belongs to one of the Q4 search space sets.

[0035] According to an aspect of the present application, the above method is characterized in that the first time-frequency resource set comprises a plurality of time-frequency resource sub-sets, any time-frequency resource sub-set of the plurality of time-frequency resource sub-sets is associated to at least one control channel candidate, and the order of starting time of the plurality of time-frequency resource sub-sets is used to determine the Q1 control channel candidates from the first control channel candidate set.

[0036] According to an aspect of the present application, the above method is characterized in that if the second information block is not transmitted, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate is one of the Q2 time window length candidates, and the Q3 search space sets indicated by the first information block are used to determine the first time window length candidate.

[0037] According to an aspect of the present application, the above method is characterized in that it comprises:

[0038] transmitting a third information block, the third information block being used to determine a second time window length candidate, the second time window length candidate being one of the Q2 time window length candidates; and if the second information block is transmitted, the time length of the first time window is equal to the second time window length candidate.

[0039] According to an aspect of the present application, the above method is characterized in that if the second information block is transmitted, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

[0040] The present application discloses a first node for wireless communication, characterized in that it comprises:

[0041] a first receiver, receiving a first information block and monitoring a second information block;

[0042] a second receiver, monitoring Q1 control channel candidates, the Q1 being a positive integer greater than 1;

[0043] Wherein, the first information block is used to determine a first control channel candidate set, which includes multiple control channel candidates; the time-frequency resources occupied by any one of the control channel candidates in the first control channel candidate set belong to a first time-frequency resource set; the time-frequency resources included in the first time-frequency resource set belong to a first time window in the time domain; the duration of the first time window is one of Q2 time window length candidates, where Q2 is a positive integer greater than 1; whether the second information block is detected is used to determine the duration of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, where Q1 is not greater than the maximum monitoring number, where the maximum monitoring number is a positive integer; the duration of the first time window is used to determine the maximum monitoring number.

[0044] This application discloses a second node for wireless communication, characterized in that it comprises:

[0045] The first transmitter sends the first information block and determines the second information block;

[0046] The second transmitter determines Q1 control channels as candidates, where Q1 is a positive integer greater than 1;

[0047] Wherein, the first information block is used to determine a first control channel candidate set, which includes multiple control channel candidates; the time-frequency resources occupied by any one of the control channel candidates in the first control channel candidate set belong to a first time-frequency resource set; the time-frequency resources included in the first time-frequency resource set belong to a first time window in the time domain; the duration of the first time window is one of Q2 time window length candidates, where Q2 is a positive integer greater than 1; whether the second information block is sent is used to determine the duration of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, where Q1 is not greater than the maximum monitoring number, where the maximum monitoring number is a positive integer; the duration of the first time window is used to determine the maximum monitoring number.

[0048] As an example, the method in this application has the following advantages:

[0049] - The blind detection capability of PDCCH is defined within the first time window, and the number of blind detections is positively correlated with the length of the first time window; different lengths of the first time window can be used inside and outside the COT, and a good trade-off can be achieved between the monitoring cycle of PDCCH and the maximum number of blind detections according to the different needs inside and outside the COT;

[0050] - The start of the COT is determined by whether the second information block is detected or not, and the switching of the time length of the first time window is triggered, which can save signaling overhead and reduce latency compared to explicit signaling notification;

[0051] - When PDCCH overbooking occurs, the search space sets are dropped in time order within the first time window, and the search spaces later in time are preferentially dropped, so that the PDCCH candidates are concentrated in the front position in the first time window, which is beneficial to reducing the scheduling delay on the one hand, and to saving UE power on the other hand. BRIEF DESCRIPTION OF DRAWINGS

[0052] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0053] Figure 1 A flowchart of a process of a first node of one embodiment of the present application is shown;

[0054] Figure 2 A schematic diagram of a network architecture according to one embodiment of the present application is shown;

[0055] Figure 3 A schematic diagram of a wireless protocol architecture of a user plane and a control plane according to one embodiment of the present application is shown;

[0056] Figure 4 A schematic diagram of a first communication device and a second communication device according to one embodiment of the present application is shown;

[0057] Figure 5 A flowchart of wireless signal transmission according to one embodiment of the present application is shown;

[0058] Figure 6 A schematic diagram of time-frequency resources included in a first time-frequency resource set according to one embodiment of the present application is shown;

[0059] Figure 7 A schematic diagram of the relationship between the time slot in which the second information block is located and the time length of the first time window according to one embodiment of the present application is shown;

[0060] Figure 8 A schematic diagram of the relationship between the time slot in which the second information block is located and the time length of the first time window according to one embodiment of the present application is shown;

[0061] Figure 9 A schematic diagram of the relationship between the first search space group, the second search space group and the first time window according to one embodiment of the present application is shown;

[0062] Figure 10 A diagram showing time-frequency resources occupied by time-frequency resource subset #1, time-frequency resource subset #2 and time-frequency resource subset #3 is shown according to an embodiment of the present application;

[0063] Figure 11 A diagram showing the relationship between the time length of the first time degree and the maximum monitoring number is shown according to an embodiment of the present application;

[0064] Figure 12 A diagram showing time-domain resources occupied by channel access detection, time-domain resources occupied by COT and time-domain resources occupied by the second information block is shown according to an embodiment of the present application;

[0065] Figure 13 A structural block diagram of a processing device used in the first node is shown;

[0066] Figure 14 A structural block diagram of a processing device used in the second node is shown. DETAILED DESCRIPTION

[0067] The technical solutions of the present application will be further described in detail below with reference to the accompanying drawings, and it should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0068] Example 1

[0069] Embodiment 1 illustrates a processing flowchart of the first node according to an embodiment of the present application, as shown in FIG. 1. In FIG. 1, each block represents a step, and it should be particularly emphasized that the order of the blocks in the figure does not represent the time sequence between the steps represented. Figure 1 Figure 1 In FIG. 2, each block represents a step, and it should be particularly emphasized that the order of the blocks in the figure does not represent the time sequence between the steps represented.

[0070] ​In embodiment 1, the first node in the present application receives a first information block and monitors a second information block in step 101. Q1 control channel candidates are monitored in step 102, where Q1 is a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised in the first time-frequency resource set belong to a first time window in time domain; the time length of the first time window is one of Q2 time window length candidates, where Q2 is a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, where Q1 is not greater than a maximum monitoring number, and the maximum monitoring number is a positive integer; and the time length of the first time window is used to determine the maximum monitoring number.

[0071] As an embodiment, the first information block is transmitted through an air interface.

[0072] As an embodiment, the first information block is transmitted through a wireless interface.

[0073] As an embodiment, the first information block comprises all or part of a higher layer signaling.

[0074] As an embodiment, the first information block comprises all or part of a physical layer signaling.

[0075] As an embodiment, the first information block comprises all or part of a RRC (Radio Resource Control) signaling.

[0076] As an embodiment, the first information block comprises all or part of a MAC (Medium Access Control) layer signaling.

[0077] As an embodiment, the first information block comprises all or part of a system information block (SIB).

[0078] As an embodiment, the first information block is cell-specific.

[0079] As an embodiment, the first information block is user equipment-specific.

[0080] As one embodiment, the first information block is per serving cell configured (Per Serving Cell).

[0081] As one embodiment, the first information block includes all or part of fields of a DCI (Downlink Control Information) signaling.

[0082] As one embodiment, the first information block includes more than one sub-information block, each sub-information block included in the first information block is an IE (Information Element) or a field in the RRC signaling to which the first information block belongs; one sub-information block included in the first information block is used to indicate the first control channel candidate set.

[0083] As one embodiment, the first information block includes all or part of fields in the IE (Information Element) “BWP-Downlink” in the RRC signaling.

[0084] As one embodiment, the first information block includes all or part of fields in the IE (Information Element) “BWP-DownlinkDedicated” in the RRC signaling.

[0085] As one embodiment, the first information block includes all or part of fields in the IE (Information Element) “PDCCH-Config” in the RRC signaling.

[0086] As one embodiment, the first information block includes all or part of fields in the IE (Information Element) “ControlResourceSet” in the RRC signaling.

[0087] As one embodiment, the first information block includes all or part of fields in the IE (Information Element) “SearchSpace” in the RRC signaling.

[0088] As one embodiment, the first information block includes the field (Field) “searchSpacesToAddModList” in the RRC signaling.

[0089] As one embodiment, the expression "the first information block is used to determine the first control channel candidate set" in a claim comprises the following meaning: the first information block is used to explicitly indicate the first control channel candidate set.

[0090] As one embodiment, the expression "the first information block is used to determine the first control channel candidate set" in a claim comprises the following meaning: the first information block is used to implicitly indicate the first control channel candidate set.

[0091] As one embodiment, the expression "the first information block is used to determine the first control channel candidate set" in a claim comprises the following meaning: the first information block is used to indicate at least one search space set, any search space set of the at least one search space set comprises at least one control channel candidate, and the first control channel candidate set comprises the at least one search space set.

[0092] As one embodiment, the expression "the first information block is used to determine the first control channel candidate set" in a claim comprises the following meaning: the first information block is used to determine a control resource set (CORESET) associated with at least one search space set comprised by the first control channel candidate set, respectively.

[0093] As one embodiment, the first information block comprises a first field, the first field is one field comprised by an IE (Information Element) "SearchSpace" in RRC signaling, and the first field indicates one search space ID (Identification).

[0094] As one embodiment, the first information block comprises a first field, the first field is one field comprised by an IE (Information Element) "SearchSpace" in RRC signaling, and the first field indicates a control resource set ID.

[0095] As one embodiment, the first information block comprises a first field, the first field is one field comprised by an IE (Information Element) in RRC signaling, and the first field indicates a plurality of search space IDs.

[0096] As an embodiment, the phrase "the first information block is used to determine a first control channel candidate set" in the claims includes the following meaning: the first information block includes a first field, the first field is a field included in an IE (Information Element) in RRC signaling, the first field indicates a search space ID; the first control channel candidate set includes a search space set represented by the search space ID indicated by the first field.

[0097] As an embodiment, the first information block indicates at least one USS set.

[0098] As an embodiment, the first information block indicates at least one CSS set.

[0099] As an embodiment, the control channel candidate is a PDCCH candidate.

[0100] As an embodiment, the control channel candidate is a PUCCH (Physical Uplink Control Channel) candidate.

[0101] As an embodiment, the control channel candidate is a PSCCH (Physical Sidelink Control Channel) candidate.

[0102] As an embodiment, the Q1 is the number of monitoring times used by the first node in the application when calculating the total number of monitoring times for the first control channel candidate set.

[0103] As an embodiment, the Q1 is the number of monitoring times used by the second node in the application when calculating the total number of monitoring times for the first control channel candidate set.

[0104] As an embodiment, the phrase "monitoring Q1 control channel candidates" includes decoding the Q1 control channel candidates.

[0105] As an embodiment, the phrase "monitoring Q1 control channel candidates" includes blind decoding the Q1 control channel candidates.

[0106] As an embodiment, the phrase "monitoring Q1 control channel candidates" includes decoding and CRC checking the Q1 control channel candidates.

[0107] As one embodiment, the phrase "monitoring Q1 control channel candidates" includes decoding and RNTI (Radio Network Temporary Identity) scrambled CRC check on the Q1 control channel candidates.

[0108] As one embodiment, the phrase "monitoring Q1 control channel candidates" includes decoding based on one or more DCI Format(s) monitored on the Q1 control channel candidates.

[0109] As one embodiment, the number of CCEs (Control Channel Elements) occupied by any one of the Q1 control channel candidates is equal to one of 1, 2, 4, 8, 16, 32.

[0110] As one embodiment, any one of the Q1 control channel candidates is a PDCCH (Physical Downlink Control Channel) candidate.

[0111] As one embodiment, any one of the Q1 control channel candidates is a Monitored PDCCH candidate.

[0112] As one embodiment, any one of the Q1 control channel candidates is a PDCCH candidate with one or more DCI Formats.

[0113] As one embodiment, any one of the Q1 control channel candidates is a PDCCH candidate with one or more DCI Payload Sizes.

[0114] As one embodiment, any one of the Q1 control channel candidates is a set of time-frequency resources carrying DCI of a particular one or more Formats.

[0115] As one embodiment, any two of the Q1 control channel candidates are not the same.

[0116] As one embodiment, there are two control channel candidates in the Q1 control channel candidates that are the same.

[0117] As one embodiment, there are two control channel candidates in the Q1 control channel candidates that occupy the same time-frequency resource.

[0118] As one embodiment, any two control channel candidates in the Q1 control channel candidates occupy different CCEs.

[0119] As one embodiment, there are two control channel candidates in the Q1 control channel candidates that occupy the same CCE set.

[0120] As one embodiment, there are two control channel candidates in the Q1 control channel candidates that occupy partially overlapping CCE sets.

[0121] As one embodiment, any two control channel candidates in the Q1 control channel candidates have different feature attributes, the feature attributes including at least one of occupied CCEs, used scrambling, and corresponding DCI payload size.

[0122] As one embodiment, there are two control channel candidates in the Q1 control channel candidates that have the same occupied CCEs, used scrambling, and corresponding DCI payload size.

[0123] As one embodiment, there are two control channel candidates in the Q1 control channel candidates that belong to two search space sets respectively.

[0124] As one embodiment, all control channel candidates in the Q1 control channel candidates belong to the same search space set.

[0125] As one embodiment, the number of occupied CCEs of any control channel candidate in the first control channel candidate set is equal to the aggregation level of the control channel candidate.

[0126] As one embodiment, the number of occupied CCEs of any control channel candidate in the second control channel candidate set is equal to the aggregation level of the control channel candidate.

[0127] As one embodiment, the number of occupied CCEs of any control channel candidate in the first control channel candidate set is equal to one of 1, 2, 4, 8, 16, 32.

[0128] As an embodiment, the number of CCEs occupied by any control channel candidate in the first control channel candidate set belongs to one number value in a first number set, the first number set comprising a positive integer number of number values, the first number set being predefined or configurable.

[0129] Example 2

[0130] Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in Fig. 2. Figure 2

[0131] Fig. 1 shows a schematic diagram of a network architecture according to the present application. Figure 2 ​A diagram illustrating a network architecture 200 of a 5G NR, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) system is shown. The 5G NR or LTE network architecture 200 can be referred to as a 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS / EPS 200 can include one or more UEs (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit- switched services or other cellular networks. The NG-RAN includes an NR Node-B (gNB) 203 and other gNBs 204. The gNB 203 provides user and control plane protocol terminations toward the UE 201. The gNB 203 can be connected to the other gNBs 204 via an Xn interface (e.g., backhaul). The gNB 203 can also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (Transmission Reception Point), or some other suitable terminology. The gNB 203 provides access to the 5GC / EPC 210 for the UE 201. Examples of UEs 201 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a non-tethered personal branch system communication, a satellite mobile communication, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a drone, a flying vehicle, a narrowband internet of things device, a machine type communication device, a land vehicle, a car, a wearable device, or any other similar functional device. Those skilled in the art will also readily appreciate that the UE 201 can be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wirelessThe gNB 203 is connected to the 5GC / EPC 210 over the S1 / NG interface. The 5GC / EPC 210 comprises a MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, further MME / AMF / SMF 214, a S-GW (Service Gateway) / UPF (User Plane Function) 212 and a P-GW (Packet Date Network Gateway) / UPF 213. The MME / AMF / SMF 211 is the control node that handles signaling between the UE 201 and the 5GC / EPC 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocal) packets are transferred through the S-GW / UPF 212, which itself is connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW / UPF 213 is connected to the Internet services 230. The Internet services 230 comprise operator corresponding Internet protocol services, in particular the Internet, the Intranet, the IMS (IP Multimedia Subsystem) and packet switched streaming services.

[0132] As one embodiment, the first node in the present application comprises the gNB 203.

[0133] As one embodiment, the second node in the present application comprises the gNB 203.

[0134] As one embodiment, the second node in the present application comprises the UE 241.

[0135] As one embodiment, the first node in the present application comprises the UE 241.

[0136] As one embodiment, the second node in the present application comprises the UE 201.

[0137] As one embodiment, the second node in the present application comprises the gNB 204.

[0138] As one embodiment, the user equipment in the present application comprises the UE 201.

[0139] As one embodiment, the user equipment in this application includes the UE 241.

[0140] As one embodiment, the base station equipment in this application includes the gNB 203.

[0141] As one embodiment, the base station equipment in this application includes the gNB 204.

[0142] Example 3

[0143] Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to this application, as shown in Figure 3. Figure 3 Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3 ​The radio protocol architecture for the control plane 300 of a first node (UE or gNB) and a second node (gNB or UE) is shown with three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical layer) signal processing functions. The L1 layer will be referred to as the PHY 301 herein. Layer 2 (L2 layer) 305 is above the PHY 301 and is responsible for the link between the first node and the second node using the PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, a RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which are terminated at the second node. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security functions, such as ciphering / de-ciphering, and header compression / de-compression, as well as handover support. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second node and the first node. The radio protocol architecture for the user plane 350 includes Layer 1 (L1 layer) and Layer 2 (L2 layer), which are substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355 for the first node and the second node, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The SDAP (Service Data Adaptation Protocol) sublayer 356 is also included in the L2 layer 355 in the user plane 350, which is responsible for mapping between QoS flows and data radio bearers (DRBs) to support diverse service types.Although not shown, the first node can have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at a P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., a remote UE, a server, etc.).

[0144] As one embodiment, the wireless protocol architecture in FIG. 3A is applicable to the first node in the present application. Figure 3

[0145] As one embodiment, the wireless protocol architecture in FIG. 3A is applicable to the first node in the present application. Figure 3

[0146] As one embodiment, the first information block in the present application is generated at the RRC 306, or the MAC 302, or the MAC 352, or the PHY 301, or the PHY 351.

[0147] As one embodiment, the second information block in the present application is generated at the RRC 306, or the MAC 302, or the MAC 352, or the PHY 301, or the PHY 351.

[0148] As one embodiment, the Ql control channel alternatives in the present application are generated at the PHY 301, or the PHY 351.

[0149] As one embodiment, the third information block in the present application is generated at the RRC 306, or the MAC 302, or the MAC 352, or the PHY 301, or the PHY 351.

[0150] Example 4

[0151] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in FIG. 4. Figure 4 Figure 4 FIG. 4 is a block diagram of a first communication device 410 and a second communication device 450 that communicate with each other in an access network.

[0152] The first communication device 410 includes a controller / processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter / receiver 418, and antennas 420.

[0153] The second communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multiple antenna transmit processor 457, a multiple antenna receive processor 458, a transmitter / receiver 454, and antennas 452. ​​​

[0154] In the transmission from the first communication device 410 to the second communication device 450, at the first communication device 410, upper layer packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements functionality of the L2 layer. In the transmission from the first communication device 410 to the second communication device 450, the controller / processor 475 provides header compression, ciphering, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocations for the second communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets, and signaling to the second communication device 450. The transmit processor 416 and the multiple antenna transmit processor 471 implement various signal processing functions for the LI layer (i.e., physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 450, and mapping of coded and interleaved data onto various signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multiple antenna transmit processor 471 performs digital spatial pre-coding of the coded and modulated symbols, including codebook-based and non-codebook-based pre-coding, and beamforming processing, to generate one or more spatial streams. The transmit processor 416 then maps to each spatial stream to the subcarriers, multiplexes with reference signals (e.g., pilot) in the time and / or frequency domain, and then performs an inverse fast Fourier transform (IFFT) to generate a time-domain multicarrier symbol stream for the physical channel. The multiple antenna transmit processor 471 then performs transmit analog pre-coding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 into a radio frequency stream, and then provides the radio frequency stream to the corresponding antenna 420.

[0155] In the transmission from the first communication device 410 to the second communication device 450, at the second communication device 450, each receiver 454 receives a signal through its respective antenna 452. Each receiver 454 recovers information modulated onto an RF carrier and converts the RF stream into a baseband multicarrier symbol stream, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions of the Ll layer. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receivers 454. The receive processor 456 converts the baseband multicarrier symbol stream from the receive analog precoding / beamforming operations from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals are demultiplexed by the receive processor 456, where the reference signals will be used for channel estimation, and the data signals are recovered after multi-antenna detection in the multi-antenna receive processor 458 for any spatial streams destined for the second communication device 450. The symbols on each spatial stream are demodulated and recovered by the receive processor 456 and generate soft decisions. The receive processor 456 then decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the first communication device 410 on the physical channels. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 can be associated with a memory 460 that stores program codes and data. The memory 460 can be referred to as a computer-readable medium. In the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals can also be provided to the L3 for L3 processing.

[0156] In the transmission from the second communication device 450 to the first communication device 410, at the second communication device 450, a data source 467 is used to provide upper layer data packets to a controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmit function described at the first communication device 410 in the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 implements header compression, ciphering, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations for the user plane and control plane. The controller / processor 459 is also responsible for retransmission of lost packets, and signaling to the first communication device 410. The transmit processor 468 performs modulation mapping, channel coding processing, multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, and then the transmit processor 468 modulates the generated spatial streams into multi-carrier / single-carrier symbol streams, which are then provided to different antennas 452 via the transmitters 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency signal, and then provides the radio frequency signal to the antenna 452.

[0157] In the transmission from the second communication device 450 to the first communication device 410, the functions at the first communication device 410 are similar to the receive functions described at the second communication device 450 in the transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives a radio frequency signal through its respective antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 together implement the functionality of the L1 layer. The controller / processor 475 implements the functionality of the L2 layer. The controller / processor 475 can be associated with a memory 476 that stores program codes and data. The memory 476 can be referred to as a computer readable medium. In the transmission from the second communication device 450 to the first communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the UE 450. Upper layer data packets from the controller / processor 475 can be provided to a core network.

[0158] As one embodiment, the first node in the present application comprises the second communication device 450, and the second node in the present application comprises the first communication device 410.

[0159] As an embodiment, the first node in the present application comprises the first communication device 410, and the second node in the present application comprises the second communication device 450.

[0160] As an embodiment, the first node in the present application comprises the second communication device 450, and the second node in the present application comprises the second communication device 450.

[0161] As a sub-embodiment of the above-mentioned embodiment, the second communication device 450 comprises at least one controller / processor; the at least one controller / processor is responsible for HARQ operation.

[0162] As a sub-embodiment of the above-mentioned embodiment, the first communication device 410 comprises at least one controller / processor; the at least one controller / processor is responsible for HARQ operation.

[0163] As a sub-embodiment of the above-mentioned embodiment, the first communication device 410 comprises at least one controller / processor; the at least one controller / processor is responsible for error detection using positive acknowledgement (ACK) and / or negative acknowledgement (NACK) protocol to support HARQ operation.

[0164] As an embodiment, the second communication device 450 comprises at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the second communication device 450 to perform the following operations: receiving a first information block and monitoring a second information block; monitoring Q1 control channel candidates, Q1 being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; the time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; and the time length of the first time window is used to determine the maximum monitoring number.

[0165] As one embodiment, the second communication device 450 comprises: a memory storing a computer readable program of instructions which, when executed by at least one processor, results in actions comprising: receiving a first information block and monitoring a second information block; monitoring Ql control channel candidates, Ql being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; a time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Ql control channel candidates belongs to the first control channel candidate set, Ql not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0166] As one embodiment, the first communication device 410 comprises: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the first communication device 410 to perform at least the following: transmitting a first information block and determining a second information block; determining Ql control channel candidates, Ql being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; a time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is transmitted is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Ql control channel candidates belongs to the first control channel candidate set, Ql not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0167] As one embodiment, the first communication device 410 comprises: a memory storing a computer readable program of instructions which, when executed by at least one processor, results in actions comprising: transmitting a first information block and determining a second information block; determining Ql control channel candidates, Ql being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; a time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is transmitted is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Ql control channel candidates belongs to the first control channel candidate set, Ql not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0168] As one embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456, the controller / processor 459, the memory 460, the data source 467} is used in the present application to receive the first information block.

[0169] As one embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456, the controller / processor 459, the memory 460, the data source 467} is used in the present application to monitor the second information block.

[0170] As one embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456, the controller / processor 459, the memory 460, the data source 467} is used in the present application to receive the third information block.

[0171] As one embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456, the controller / processor 459, the memory 460, the data source 467} is used in the present application to monitor the Ql control channel candidates.

[0172] As an embodiment, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, the controller / processor 475, the memory 476} is used for transmitting the first information block in the present application.

[0173] As an embodiment, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, the controller / processor 475, the memory 476} is used for transmitting the second information block in the present application.

[0174] As an embodiment, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, the controller / processor 475, the memory 476} is used for transmitting the third information block in the present application.

[0175] Example 5

[0176] Embodiment 5 illustrates a flow chart of wireless signal transmission according to an embodiment of the present application, as shown in FIG. 5. In FIG. 5, the first node U1 and the second node U2 communicate through an air interface. In FIG. 5, the order of steps in the blocks does not represent a specific time sequence between the steps. Figure 5 In FIG. 5, the order of steps in the blocks does not represent a specific time sequence between the steps. Figure 5 In FIG. 5, the order of steps in the blocks does not represent a specific time sequence between the steps. Figure 5

[0177] For the transmitter, in step S21, the third information block is transmitted, in step S22, the first information block is transmitted, in step S23, the second information block is determined, and in step S24, the Q1 control channel candidates are determined. First node U1

[0178] For the transmitter, in step S21, the third information block is transmitted, in step S22, the first information block is transmitted, in step S23, the second information block is determined, and in step S24, the Q1 control channel candidates are determined. Second node U2

[0179] ​​​In embodiment 5, the first node U1 receives a first information block and monitors a second information block; the first node U1 monitors Q1 control channel candidates, Q1 being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; a time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0180] In embodiment 5, the second node U2 sends a first information block and determines a second information block, the second node U2 determines Q1 control channel candidates, Q1 being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one of the control channel candidates comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; a time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is sent is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0181] As an embodiment, the air interface between the second node U2 and the first node U1 comprises a PC5 interface.

[0182] As an embodiment, the air interface between the second node U2 and the first node U1 comprises a sidelink.

[0183] As an embodiment, the air interface between the second node U2 and the first node U1 comprises a Uu interface.

[0184] As one embodiment, the air interface between the second node U2 and the first node U1 comprises a cellular link.

[0185] As one embodiment, the air interface between the second node U2 and the first node U1 comprises a wireless interface between user equipment and user equipment.

[0186] As one embodiment, the air interface between the second node U2 and the first node U1 comprises a wireless interface between base station equipment and user equipment.

[0187] As one embodiment, the third information block is transmitted over an air interface.

[0188] As one embodiment, the third information block is transmitted over a wireless interface.

[0189] As one embodiment, the third information block comprises all or part of higher layer signaling.

[0190] As one embodiment, the third information block comprises all or part of physical layer signaling.

[0191] As one embodiment, the third information block comprises all or part of RRC (Radio Resource Control) signaling.

[0192] As one embodiment, the third information block comprises all or part of MAC (Medium Access Control) layer signaling.

[0193] As one embodiment, the third information block comprises all or part of DCI.

[0194] As one embodiment, the third information block comprises all or part of broadcast information.

[0195] As one embodiment, the third information block comprises all or part of SIB.

[0196] As one embodiment, the third information block is used to determine a second time window length alternative, which is one of the Q2 time window length alternatives; if the second information block is detected, the time length of the first time window is equal to the second time window length alternative.

[0197] As one embodiment, the phrase "determining Q1 control channel alternatives" means determining the number of the Q1 control channel alternatives.

[0198] As an example, the phrase "determine Q1 control channel candidates" means: determining the time-frequency resources occupied by the Q1 control channel candidates.

[0199] As an example, the phrase "determine Q1 control channel candidates" means: determining whether to transmit the first control channel on the time-frequency resources occupied by the Q1 control channel candidates.

[0200] As an example, the phrase "determine Q1 control channel candidates" means: determine one control channel candidate from the Q1 control channel candidates for transmitting the first control channel.

[0201] As one embodiment, the first control channel includes a PDCCH.

[0202] As one embodiment, the first control channel includes PSCCH.

[0203] As an example, the phrase "determine the second information block" means: determine the time-frequency resources occupied by the second information block.

[0204] As an example, the phrase "determine the second information block" means: determining whether to send the second information block.

[0205] As an example, the phrase "determine the second information block" means: determine the payload contained in the second information block.

[0206] As an example, the phrase "determine the second information block" means: determining a control channel candidate for transmitting the second information block from among a plurality of control channel candidates, and transmitting the second information block.

[0207] Example 6

[0208] Example 6 illustrates a schematic diagram of the time-frequency resources included in a first time-frequency resource set according to an embodiment of this application, as shown in the attached diagram. Figure 6 As shown. In the appendix Figure 6 In the diagram, the white-filled boxes represent the duration of a time slot in the time domain and a segment of frequency resources in the frequency domain. The diagonally filled boxes and the grid-striped boxes represent the time-frequency resources occupied by the first time-frequency resource set in two different time slots, respectively. (See appendix...) Figure 6 In this document, the size and position of the boxes are for illustrative purposes only and do not represent the actual size of the resources, nor do they represent that the resource occupancy is continuous. In Embodiment 6, the first time window includes 8 consecutive time slots, and the first time-frequency resource set is located in the first and fifth time slots of the first time window in the time domain.

[0209] As one embodiment, the time slot is a slot defined by 3GPP TS 36 series protocol.

[0210] As one embodiment, the time slot is a subframe defined by 3GPP TS 36 series protocol.

[0211] As one embodiment, the time slot is a slot defined by 3GPP TS 38 series protocol.

[0212] As one embodiment, the time slot is a mini-slot defined by 3GPP TS 38 series protocol.

[0213] As one embodiment, the time slot is a subframe defined by 3GPP TS 38 series protocol.

[0214] As one embodiment, the time slot is a slot defined by IEEE 802 series protocol.

[0215] As one embodiment, the time slot is a frame defined by IEEE 802 series protocol.

[0216] As one embodiment, the time slot includes 2 multicarrier symbols.

[0217] As one embodiment, the time slot includes 4 multicarrier symbols.

[0218] As one embodiment, the time slot includes 7 multicarrier symbols.

[0219] As one embodiment, the time slot includes 14 multicarrier symbols.

[0220] As one embodiment, the time slot includes a positive integer multiple of 14 multicarrier symbols.

[0221] As one embodiment, the first time window includes one slot.

[0222] As one embodiment, the first time window includes one PDCCH span.

[0223] As one embodiment, the first time window includes a time interval between two adjacent PDCCH spans.

[0224] As one embodiment, the start time of the first time window is the start time of a PDCCH span.

[0225] As one embodiment, the start time of the first time window is the start time of a slot in which a PDCCH span is located.

[0226] As one embodiment, the first time window comprises a time interval between a start time of a PDCCH extension and a start time of a next PDCCH extension.

[0227] As one embodiment, the first time window is a monitoring occasion (MO).

[0228] As one embodiment, the start time of the first time window is a start time of a monitoring occasion (MO).

[0229] As one embodiment, the start time of the first time window is a start time of a slot in which a monitoring occasion is located.

[0230] As one embodiment, the first time window comprises a positive integer number of multicarrier symbols.

[0231] As one embodiment, the first time window comprises a positive integer number of slots (Slot) greater than 1.

[0232] As one embodiment, the first time window comprises a positive integer number of consecutive slots (Slot) greater than 1.

[0233] As one embodiment, the first time window comprises more than 14 multicarrier symbols.

[0234] As one embodiment, the multicarrier symbol comprises an OFDM (Orthogonal Frequency Divided Multiplexing) symbol.

[0235] As one embodiment, the multicarrier symbol comprises a DFT-s-OFDM (Discreteed Fourier Transform-spreading-Orthogonal Frequency Divided Multiplexing) symbol.

[0236] As one embodiment, the multicarrier symbol comprises an SC-FDMA (Single Carrier-Frequency Divided Multiple Access) symbol.

[0237] As one embodiment, the first time-frequency resource set comprises a positive integer number of resource elements (RE) in frequency domain.

[0238] As one embodiment, the first set of time-frequency resources comprises a positive integer number of resource blocks (RBs) in the frequency domain.

[0239] As one embodiment, the first set of time-frequency resources comprises a positive integer number of resource block groups (RBGs) in the frequency domain.

[0240] As one embodiment, the first set of time-frequency resources comprises a positive integer number of control channel elements (CCEs) in the frequency domain.

[0241] As one embodiment, the first set of time-frequency resources comprises a positive integer number of multicarrier symbols in the time domain.

[0242] As one embodiment, the first set of time-frequency resources comprises a positive integer number of slots in the time domain.

[0243] As one embodiment, the first set of time-frequency resources comprises a positive integer number of subframes in the time domain.

[0244] As one embodiment, the first set of time-frequency resources comprises a plurality of consecutive multicarrier symbols in the time domain.

[0245] As one embodiment, the first set of time-frequency resources comprises a plurality of consecutive slots in the time domain.

[0246] As one embodiment, the first set of time-frequency resources comprises a plurality of consecutive resource blocks in the frequency domain.

[0247] As one embodiment, the first set of time-frequency resources comprises a plurality of non-consecutive resource blocks in the frequency domain.

[0248] As one embodiment, the first set of time-frequency resources comprises time-frequency resources comprised by one control resource set (CORESET).

[0249] As one embodiment, the first set of time-frequency resources comprises time-frequency resources comprised by a plurality of control resource sets (CORESETs).

[0250] As one embodiment, the first set of time-frequency resources comprises time-frequency resources comprised by a plurality of control resource sets (CORESETs), which time-frequency resources are located in the same slot in the time domain.

[0251] As an embodiment, the first time-frequency resource set comprises time-frequency resources comprised in a plurality of control resource sets (CORESETs), respectively.

[0252] As a sub-embodiment of the above embodiment, the plurality of time slots within the first time window are consecutive in time domain.

[0253] As a sub-embodiment of the above embodiment, at least 2 time slots among the plurality of time slots within the first time window are non-consecutive in time domain.

[0254] As a sub-embodiment of the above embodiment, the first time slot within the first time window is comprised in the plurality of time slots within the first time window.

[0255] As an embodiment, the first time-frequency resource set is located in one time slot within the first time window in time domain.

[0256] As an embodiment, the first time-frequency resource set is located in the first time slot within the first time window in time domain.

[0257] As an embodiment, the first time-frequency resource set is located in M1 time slots consecutive in time domain within the first time window, the M1 being an integer greater than 1.

[0258] As an embodiment, the first time-frequency resource set is located in the first M1 time slots consecutive in time domain within the first time window, the M1 being an integer greater than 1.

[0259] As an embodiment, the first time-frequency resource set comprises frequency domain resources occupied by all control channel candidates comprised in the first control channel candidate set in frequency domain.

[0260] As an embodiment, the first time-frequency resource set comprises time domain resources occupied by all control channel candidates comprised in the first control channel candidate set in time domain.

[0261] As an embodiment, the first time-frequency resource set comprises multi-carrier symbols occupied by all control channel candidates comprised in the first control channel candidate set in time domain.

[0262] As an embodiment, the first time-frequency resource set comprises time slots where all control channel candidates comprised in the first control channel candidate set are located in time domain.

[0263] Example 7

[0264] Embodiment 7 illustrates a schematic diagram of the relationship between the time slot where the second information block is located and the time length of the first time window according to an embodiment of the present application, as shown in FIG. 7. In FIG. 7, the white-filled box represents the time length of one time slot in the time domain and a frequency resource in the frequency domain, and the horizontally striped-filled box represents the time-frequency resource occupied by the second information block. Figure 7 Figure 7 In FIG. 7, the size and position of the box are only for illustration and do not represent the actual size of the resource or the continuity of the resource occupation. In Embodiment 7, the second information block is located in the third time slot in FIG. 7, N1 represents the time length of the first time window, which is 1 time slot, and N1 is a positive integer. For example, before the start time of the third time slot where the second information block is located, N1 is equal to the time length of 1 time slot; after the start time of the third time slot where the second information block is located, N1 is equal to the time length of 4 time slots. In Embodiment 7, when N1 = 1, N1 is equal to the first time window length alternative in the present application; when N1 = 4, N1 is equal to the second time window length alternative in the present application. Figure 7 Figure 7 As an embodiment, for the first node, whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length alternatives.

[0265] As an embodiment, for the second node, whether the second information block is sent is used to determine the time length of the first time window from the Q2 time window length alternatives.

[0266] As an embodiment, for the second node, whether the second information block is sent is used to determine the time length of the first time window from the Q2 time window length alternatives.

[0267] As an embodiment, if the second information block is detected, the time length of the first time window is equal to the larger one of the first time window length alternative and the second time window length alternative.

[0268] As an embodiment, for the first node, if the second information block is not detected, the time length of the first time window is the time length of one time slot.

[0269] As an embodiment, for the first node, if the second information block is detected, the time length of the first time window is the time length of N2 time slots, and N2 is a positive integer greater than 1.

[0270] As an embodiment, for the second node, if the second information block is not sent, the time length of the first time window is the time length of one time slot.

[0271] ​​As one embodiment, for the second node, if the second information block is transmitted, the time length of the first time window is a time length of N2 time slots, the N2 being a positive integer greater than 1.

[0272] As one embodiment, if the second information block is not detected, the time length of the first time window is equal to a first time window length alternative, the first time window length alternative being one of the Q2 time window length alternatives.

[0273] As one embodiment, any of the Q2 time window length alternatives is a time length of a positive integer number of multicarrier symbols.

[0274] As one embodiment, any of the Q2 time window length alternatives is a time length of a positive integer number of time slots.

[0275] As one embodiment, any of the Q2 time window length alternatives is a positive integer.

[0276] As one embodiment, any of the Q2 time window length alternatives is a positive integer in units of number of multicarrier symbols.

[0277] As one embodiment, any of the Q2 time window length alternatives is a positive integer in units of number of time slots.

[0278] As one embodiment, any of the Q2 time window length alternatives is a real number in units of number of time slots.

[0279] As one embodiment, the Q2 time window length alternatives are determined by a capability of the first node.

[0280] As one embodiment, the first node reports the Q2 time window length alternatives to the second node.

[0281] As one embodiment, the Q2 time window length alternatives include at least one of {1, 2, 4, 8, 16}.

[0282] As one embodiment, the Q2 time window length alternatives include at least one of 1 to 16.

[0283] As one embodiment, if the second information block is detected, the time length of the first time window is equal to a second time window length alternative, the second time window length alternative being one of the Q2 time window length alternatives.

[0284] As an embodiment, the first receiver receives a third information block, the third information block indicating the second time window length alternative.

[0285] As an embodiment, the third information block and the first information block are the same RRC signaling.

[0286] As an embodiment, the third information block and the first information block are two fields in the same RRC signaling respectively.

[0287] As an embodiment, the third information block and the second information block are the same DCI.

[0288] As an embodiment, the third information block and the second information block are two fields in the same DCI respectively.

[0289] As an embodiment, the third information block is transmitted before the second information block.

[0290] As an embodiment, the second time window length alternative is greater than the first time window length alternative.

[0291] As an embodiment, the first time window length alternative is a time length of one slot.

[0292] As an embodiment, the second time window length alternative is a time length of multiple slots.

[0293] As an embodiment, the second information block comprises a baseband signal.

[0294] As an embodiment, the second information block comprises a wireless signal.

[0295] As an embodiment, the second information block is transmitted on a SideLink.

[0296] As an embodiment, the second information block is transmitted on an UpLink.

[0297] As an embodiment, the second information block is transmitted on a DownLink.

[0298] As an embodiment, the second information block is transmitted on a Backhaul.

[0299] As an embodiment, the second information block is transmitted through a Uu interface.

[0300] As an embodiment, the second information block is transmitted through a PC5 interface.

[0301] As one embodiment, the second information block carries one TB (Transport Block).

[0302] As one embodiment, the second information block carries one CB (Code Block).

[0303] As one embodiment, the second information block carries one CBG (Code Block Group).

[0304] As one embodiment, the second information block includes control information.

[0305] As one embodiment, the second information block includes SCI (Sidelink Control Information).

[0306] As one embodiment, the second information block includes at least one field in one SCI.

[0307] As one embodiment, the second information block includes at least one field in one SCI format.

[0308] As one embodiment, the second information block includes UCI (Uplink Control Information).

[0309] As one embodiment, the second information block includes at least one field in one UCI.

[0310] As one embodiment, the second information block includes at least one field in one UCI format.

[0311] As one embodiment, the second information block includes DCI (Downlink Control Information).

[0312] As one embodiment, the second information block includes at least one field in one DCI.

[0313] As one embodiment, the second information block includes at least one field in one DCI format.

[0314] As one embodiment, the second information block includes a physical uplink shared channel (PUSCH).

[0315] As one embodiment, the second information block comprises a Physical Uplink Control Channel (PUCCH).

[0316] As one embodiment, the second information block comprises a Physical Downlink Shared Channel (PDSCH).

[0317] As one embodiment, the second information block comprises a Physical Downlink Control Channel (PDCCH).

[0318] As one embodiment, the second information block comprises a Physical Sidelink Control Channel (PSCCH).

[0319] As one embodiment, the second information block comprises a Physical Sidelink Shared Channel (PSSCH).

[0320] As one embodiment, the second information block comprises a Physical Sidelink Feedback Channel (PSFCH).

[0321] As one embodiment, the second information block is transmitted in a licensed spectrum.

[0322] As one embodiment, the second information block is transmitted in an unlicensed spectrum.

[0323] As one embodiment, the second information block comprises an uplink reference signal.

[0324] As one embodiment, the second information block comprises a downlink reference signal.

[0325] As one embodiment, the second information block comprises a sidelink reference signal.

[0326] As one embodiment, the second information block comprises a Demodulation Reference Signal (DMRS).

[0327] As one embodiment, the second information block comprises a Sounding Reference Signal (SRS).

[0328] As an embodiment, the second information block comprises a Configured Grant uplink signal.

[0329] As an embodiment, the second information block comprises a dynamically scheduled uplink signal.

[0330] As an embodiment, the second information block comprises a semi-static scheduled uplink signal.

[0331] As an embodiment, the second information block comprises a Configured Grant PUSCH (CG-PUSCH).

[0332] As an embodiment, the second information block comprises a dynamically scheduled PUSCH.

[0333] As an embodiment, the second information block comprises a semi-static scheduled PUSCH.

[0334] As an embodiment, the second information block comprises a Group Common PDCCH.

[0335] As an embodiment, the second information block comprises a DCI format 2_0, the definition of which is referred to 3GPP TS 38.212.

[0336] As an embodiment, the second information block comprises at least one field in a DCI format 2_0.

[0337] As an embodiment, the second information block comprises resource indication information.

[0338] As an embodiment, the second information block is scrambled by a C-RNTI (Cell-Radio Network Temporary Identifier).

[0339] As an embodiment, the second information block is scrambled by a SFI-RNTI (Slot Format Indicator-Radio Network Temporary Identifier).

[0340] As an embodiment, the second information block is used to indicate at least one of a slot format, a duration of a COT, a set of available RBs, and a search space set switching identification.

[0341] As one embodiment, the second information block includes a time window switch indication, the time window switch indication is used to indicate a switch of the time length of the first time window.

[0342] As one embodiment, the second information block includes a time window switch indication, the time window switch indication is used to indicate a switch of the time length of the first time window from the first time window length alternative to the second time window length alternative.

[0343] As one embodiment, the second information block includes a time window switch indication, the time window switch indication is used to indicate whether to switch the time length of the first time window from the first time window length alternative to the second time window length alternative.

[0344] As one embodiment, the second information block includes a time window switch indication, the time window switch indication is 1 bit, when the time window switch indication is 1, the time length of the first time window is switched from the first time window length alternative to the second time window length alternative; when the time window switch indication is 0, the time length of the first time window is not switched.

[0345] As one embodiment, the second information block includes a time window switch indication, the time window switch indication is 1 bit, when the time window switch indication is 1, the time length of the first time window is not switched; when the time window switch indication is 0, the time length of the first time window is switched from the first time window length alternative to the second time window length alternative.

[0346] As one embodiment, the second information block is transmitted by one of the Q1 control channel alternatives.

[0347] As one embodiment, the second information block is not transmitted by one of the Q1 control channel alternatives.

[0348] As one embodiment, the phrase "monitoring the second information block" includes: attempting to decode the wireless signal to determine whether the second information block is detected.

[0349] As one embodiment, the phrase "monitoring the second information block" includes: determining whether the second information block is detected in the received wireless signal.

[0350] As one embodiment, the phrase "monitoring the second information block" includes: determining whether the second information block is included in the received wireless signal.

[0351] As one embodiment, the phrase "monitoring the second information block" comprises decoding one or more control channel candidates and determining whether the second information block is detected.

[0352] As one embodiment, the phrase "monitoring the second information block" comprises blind decoding one or more control channel candidates and determining whether the second information block is detected.

[0353] As one embodiment, the phrase "monitoring the second information block" comprises decoding and CRC check one or more control channel candidates and determining whether the second information block is detected.

[0354] As one embodiment, the phrase "monitoring the second information block" comprises decoding and CRC check scrambled by RNTI (Radio Network Temporary Identity) one or more control channel candidates and determining whether the second information block is detected.

[0355] As one embodiment, the sentence "whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates" comprises whether the second information block is detected is used to determine whether to switch the time length of the first time window from the first time window length candidate to the second time window length candidate.

[0356] As one embodiment, the phrase "whether the second information block is detected" comprises whether the first receiver detects a second information block in the Q1 control channel candidates.

[0357] As one embodiment, if the second information block is detected, the time length of the first time window is switched to the second time window length candidate starting from the starting moment of the time slot where the second information block is located.

[0358] As one embodiment, if the second information block is detected, the time length of the first time window is switched to the second time window length candidate starting from the starting moment of the time domain resource occupied by the second information block.

[0359] As one embodiment, if the second information block is detected, the time length of the first time window is switched to the second time window length candidate starting from the ending moment of the time domain resource occupied by the second information block.

[0360] As an embodiment, the time domain resource occupied by the second information block comprises a CORESET occupied by the second information block.

[0361] As an embodiment, the time length of the first time window within the COT is equal to the second time window length candidate.

[0362] As an embodiment, the time length of the first time window within the first M1*K slots of the COT is equal to the second time window length candidate, where M1 is equal to the second time window length candidate, K is a positive integer, and * denotes multiplication.

[0363] As an embodiment, when the time length M2 of the COT is not an integer multiple of the second time window length candidate M1, the first node does not monitor the control channel candidate in the M1*ceil(M2 / M1)-M2 slots after the end time of the COT, where ceil() denotes the ceiling function, / denotes division, and * denotes multiplication.

[0364] As an embodiment, when the time length M2 of the COT is not an integer multiple of the second time window length candidate M1, the time length of the first time window in the last M2-M1*floor(M2 / M1) slots within the COT is equal to the first time window length candidate, where floor() denotes the floor function, / denotes division, and * denotes multiplication.

[0365] As an embodiment, the time length of the first time window after the end time of the COT is determined as the first time window length candidate.

[0366] As an embodiment, the time length of the first time window after the end time of the COT is switched from the second time window length candidate to the first time window length candidate.

[0367] Example 8

[0368] Embodiment 8 illustrates a schematic diagram of the relationship between the time length of the first time window and the slot in which the second information block is located according to an embodiment of the present application, as shown in FIG. 8. Figure 8 In FIG. 8, the white-filled box represents the time length of one slot in the time domain and a frequency resource in the frequency domain, and the horizontally striped-filled box represents the time-frequency resource occupied by the second information block. Figure 8 In FIG. 8, the size and position of the box are only for illustration and do not represent the actual size of the resource or the continuity of the resource occupation. Figure 8 In Embodiment 8, the second information block is located in the slot 2, and the time length of the first time window is equal to the first time window length candidate. Figure 8N1 represents a time length of the first time window, in units of time slots, and N1 is a positive integer. For example, before the start time of the third time slot, N1 is equal to a time length of one time slot; after the start time of the third time slot, N1 is equal to a time length of four time slots. In Embodiment 8, the switching time of the time length of the first time window is the start time of the second time slot after the end time of the time slot in which the second information block is located. In Embodiment 8, when N1 = 1, N1 is equal to the first time window length alternative in this application; when N1 = 4, N1 is equal to the second time window length alternative in this application.

[0369] As an embodiment, the phrase "whether the second information block is detected" includes whether the first receiver detects the second information block in a second time-frequency resource set, the time-frequency resources included in the second time-frequency resource set do not belong to the first time window in the time domain, and the start time of the second time-frequency resource set is earlier than the start time of the first time-frequency resource set.

[0370] As a sub-embodiment of the above embodiment, the second time-frequency resource set and the first time-frequency resource set are located in the same COT in the time domain.

[0371] As a sub-embodiment of the above embodiment, the second time-frequency resource set and the first time-frequency resource set are not located in the same COT in the time domain, and the second time-frequency resource set is located in a COT before the COT in which the first time-frequency resource set is located.

[0372] As a sub-embodiment of the above embodiment, the time interval between the second time-frequency resource set and the first time-frequency resource set is not greater than a first time threshold, and the first time threshold is equal to the time length of at least one multicarrier symbol.

[0373] As a sub-embodiment of the above embodiment, the time interval between the start time of the second time-frequency resource set and the start time of the first time-frequency resource set is not greater than a first time threshold, and the first time threshold is equal to the time length of at least one multicarrier symbol.

[0374] As a sub-embodiment of the above embodiment, the time interval between the end time of the second time-frequency resource set and the start time of the first time-frequency resource set is not greater than a first time threshold, and the first time threshold is equal to the time length of at least one multicarrier symbol.

[0375] As an embodiment, the second time-frequency resource set includes a positive integer number of resource elements (REs) in the frequency domain.

[0376] As one embodiment, the second set of time-frequency resources comprises a positive integer number of resource blocks (RBs) in the frequency domain.

[0377] As one embodiment, the second set of time-frequency resources comprises a positive integer number of control channel elements (CCEs) in the frequency domain.

[0378] As one embodiment, the second set of time-frequency resources comprises a positive integer number of multicarrier symbols in the time domain.

[0379] As one embodiment, the second set of time-frequency resources comprises a positive integer number of slots in the time domain.

[0380] As one embodiment, the second set of time-frequency resources comprises a positive integer number of subframes in the time domain.

[0381] As one embodiment, the second set of time-frequency resources comprises time-frequency resources comprised in one control resource set (CORESET).

[0382] As one embodiment, the second set of time-frequency resources comprises time-frequency resources comprised in a plurality of control resource sets (CORESETs).

[0383] As one embodiment, if the second information block is detected, the time length of the first time window is switched to the second time window length alternative starting at the beginning of the N3-th slot after the end of the slot in which the second information block is located, the N3 being a positive integer.

[0384] As one embodiment in Embodiment 8, the N3 is 2.

[0385] As one embodiment, if the second information block is detected, the time length of the first time window is switched to the second time window length alternative starting at the beginning of the N4-th multicarrier symbol after the end of the second set of time-frequency resources, the N4 being a positive integer.

[0386] As one embodiment, the phrase “if the second information block is not detected” in the present application comprises when the second information block is not detected and the current time is not inside a COT.

[0387] As one embodiment, the phrase “if the second information block is not detected” in the present application comprises when the second information block is not detected and the time length of the first time window at the current time is not the second time window length alternative.

[0388] As an example, the phrase "if the second information block is not detected" in this application includes when the second information block is not detected and the length of the first time window at the current moment is an alternative to the length of the first time window.

[0389] As an example, the phrase "if the second information block is detected" in this application includes the current time being within a COT, and the second information block being detected within the COT.

[0390] As an example, the phrase "if the second information block is detected" in this application includes when the second information block is detected in the second time-frequency resource set, and the duration of the first time window at the current time is not a candidate for the first time window length.

[0391] As an example, the phrase "if the second information block is detected" in this application includes when the second information block is detected in the second time-frequency resource set, and the length of the first time window at the current time is an alternative to the length of the second time window.

[0392] Example 9

[0393] Example 9 illustrates a schematic diagram of the relationship between a first search space group, a second search space group, and a first time window according to an embodiment of this application, as shown in the attached diagram. Figure 9 As shown. In the appendix Figure 9 In the diagram, the white-filled boxes represent the time length of a time slot in the time domain and a segment of frequency resources in the frequency domain. The two boxes filled with diagonal stripes represent the time-frequency resources occupied by the first search space group during two control channel monitoring opportunities, respectively. The boxes filled with grid stripes represent the time-frequency resources occupied by the second search space group during one control channel opportunity. In Embodiment 9, both the first and second search space groups include at least one search space set, and any search space set included in the first and second search space groups belongs to the Q3 search space sets described in this application.

[0394] As an example, the first information block is used to determine Q3 search space sets, where Q3 is a positive integer, and any one of the Q3 search space sets includes at least one control channel candidate; the maximum monitoring quantity is used to determine Q4 search space sets from the Q3 search space sets, where Q4 is a positive integer not greater than Q3; any one of the Q1 control channel candidates belongs to one of the Q4 search space sets.

[0395] As one embodiment, the Q3 search space sets include at least one common search space set (CSS set).

[0396] As one embodiment, the Q3 search space sets include at least one user-specific search space set (USS set).

[0397] As one embodiment, the Q3 search space sets include at least one user-specific search space set (USS set).

[0398] As one embodiment, the Q3 search space sets do not include a common search space set (CSS set).

[0399] As one embodiment, the first information block is used to indicate the Q3 search space sets.

[0400] As one embodiment, the second information block is a control channel alternative transmission in one of the common search space sets in the Q3 search space sets.

[0401] As one embodiment, the Q3 search space sets are used to determine the first time window length alternative.

[0402] As one embodiment, the search space set with the smallest periodicity in the Q3 search space sets is used to determine the first time window length alternative.

[0403] As one embodiment, the periodicity of the search space set with the smallest periodicity in the Q3 search space sets is equal to the first time window length alternative.

[0404] As one embodiment, the time interval in time domain of the two time-frequency resource subsets in the Q3 time-frequency resource subsets respectively associated with the Q3 search space sets without time domain resource overlap and with the smallest time domain interval is used to determine the first time window length alternative.

[0405] As one embodiment, the time interval in time domain of the two time-frequency resource subsets in the Q3 time-frequency resource subsets respectively associated with the Q3 search space sets without time domain resource overlap and with the smallest time domain interval is equal to the first time window length alternative.

[0406] As one embodiment, the time interval in time domain of the two time-frequency resource subsets in the Q3 time-frequency resource subsets respectively associated with the Q3 search space sets without time domain resource overlap and with the smallest time domain interval is an integer multiple of the first time window length alternative.

[0407] As one embodiment, the control channel monitoring occasion is a PDCCH monitoring occasion.

[0408] As one embodiment, the control channel monitoring occasion is a PSCCH monitoring occasion.

[0409] As one embodiment, the control channel monitoring occasion is within multiple contiguous time-domain symbols.

[0410] As one embodiment, the control channel monitoring occasion is within one slot.

[0411] As one embodiment, the control channel monitoring occasion is within multiple contiguous slots.

[0412] As one embodiment, the control channel monitoring occasion is within a first time window.

[0413] As one embodiment, the expression "the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets" implies that when the total number of control channel candidates included in the Q3 search space sets is greater than the maximum monitoring number, Q4 search space sets among the Q3 search space sets are monitored, and the search space sets other than the Q4 search space sets among the Q3 search space sets are not monitored, wherein the total number of control channel candidates included in the Q4 search space sets is not greater than the maximum monitoring number.

[0414] Example 10

[0415] Embodiment 10 illustrates a diagram of time-frequency resources occupied by time-frequency resource subset #1, time-frequency resource subset #2 and time-frequency resource subset #3 according to one embodiment of the present application, as shown in FIG. 10. In FIG. 10, the time-frequency resource subset #1 is indicated by the hatched area, the time-frequency resource subset #2 is indicated by the cross-hatched area, and the time-frequency resource subset #3 is indicated by the stippled area. Figure 10 As shown in FIG. 11, the time-frequency resource subset #1 is indicated by the hatched area, the time-frequency resource subset #2 is indicated by the cross-hatched area, and the time-frequency resource subset #3 is indicated by the stippled area. Figure 10In some embodiments, the white filled box represents a time length of one slot in time domain and a frequency resource in frequency domain, and the three diagonally striped filled boxes represent the time-frequency resource subset #1, the time-frequency resource subset #2 and the time-frequency resource subset #3, respectively, where the suffix # and the number are used to distinguish the three time-frequency resource subsets. In Embodiment 10, the first time-frequency resource set includes a plurality of time-frequency resource subsets, any one of the plurality of time-frequency resource subsets is associated to at least one control channel candidate, and the order of the starting time of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set. In Embodiment 10, the time-frequency resource subset #1, the time-frequency resource subset #2 and the time-frequency resource subset #3 all belong to the plurality of time-frequency resource subsets included in the first time-frequency resource set.

[0416] As an embodiment, any one of the plurality of time-frequency resource subsets includes one or more multi-carrier symbols in time domain.

[0417] As an embodiment, any one of the plurality of time-frequency resource subsets includes one or more continuous multi-carrier symbols in time domain.

[0418] As an embodiment, any one of the plurality of time-frequency resource subsets includes one slot in time domain.

[0419] As an embodiment, any one of the plurality of time-frequency resource subsets includes a plurality of continuous slots in time domain.

[0420] As an embodiment, any one of the plurality of time-frequency resource subsets is located within one slot in time domain.

[0421] As an embodiment, any one of the plurality of time-frequency resource subsets is located within a plurality of continuous slots in time domain.

[0422] As an embodiment, any one of the plurality of time-frequency resource subsets includes at least one RB in frequency domain.

[0423] As an embodiment, any one of the plurality of time-frequency resource subsets includes time-frequency resources included in one CORESET.

[0424] As an embodiment, any one of the plurality of time-frequency resource subsets includes time-frequency resources included in a plurality of CORESETs.

[0425] As one embodiment, any of the plurality of time-frequency resource subsets comprises time-frequency resources occupied by CORESETs associated with at least one of the Q3 search space sets.

[0426] As one embodiment, any of the plurality of time-frequency resource subsets comprises time-frequency resources occupied by CORESETs associated with at least one of the Q3 search space sets.

[0427] As one embodiment, any of the plurality of time-frequency resource subsets comprises time-frequency resources occupied by CORESETs associated with at least one of the Q3 search space sets.

[0428] As one embodiment, the expression “any of the plurality of time-frequency resource subsets is associated to at least one control channel candidate” in the present application comprises that any of the plurality of time-frequency resource subsets is used to transmit at least one control channel candidate.

[0429] As one embodiment, the expression “any of the plurality of time-frequency resource subsets is associated to at least one control channel candidate” in the present application comprises that any of the plurality of time-frequency resource subsets comprises at least one CORESET, and the at least one CORESET is used to transmit at least one control channel candidate.

[0430] As one embodiment, the expression “any of the plurality of time-frequency resource subsets is associated to at least one control channel candidate” in the present application comprises that any of the plurality of time-frequency resource subsets comprises at least one CORESET, and any of the at least one CORESET is associated to at least one search space set, and any of the at least one search space set comprises at least one control channel candidate.

[0431] As one embodiment, the expression “the order of the starting time of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set” comprises that the plurality of time-frequency resource subsets are numbered in time order, and the numbering is used to determine the Q1 control channel candidates.

[0432] As an embodiment, the meaning of the expression "the order of the starting moment of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set" includes that all control channel candidates included in at least one search space set associated with the N5 time-frequency resource subsets with the earliest starting moment among the plurality of time-frequency resource subsets belong to the Q1 control channel candidates, where N5 is a positive integer.

[0433] As an embodiment, the expression "the order of the starting moment of the plurality of time-frequency resource subsets" in this application includes the order of the starting moment of the time-frequency resource subsets to which the Q3 search space sets are respectively associated.

[0434] As an embodiment, the meaning of the expression "the order of the starting moment of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set" includes that all control channel candidates in the N5 time-frequency resource subsets with the earliest starting moment among the plurality of time-frequency resource subsets in the first control channel candidate set belong to the Q1 control channel candidates, where N5 is a positive integer.

[0435] As an embodiment, the meaning of the expression "the order of the starting moment of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set" includes that all control channel candidates included in at least one search space set associated with the N5 time-frequency resource subsets with the earliest starting moment among the plurality of time-frequency resource subsets belong to the Q1 control channel candidates, where N5 is a positive integer.

[0436] As an embodiment, the meaning of the expression "the order of the starting moment of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set" includes that all control channel candidates included in at least one search space set associated with the N5 time-frequency resource subsets with the earliest starting moment among the plurality of time-frequency resource subsets do not belong to the Q1 control channel candidates, where N5 is a positive integer.

[0437] As an embodiment, the meaning of the expression "the order of the starting moment of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set" includes that all control channel candidates included in all search space sets associated with the N5 time-frequency resource subsets with the earliest starting moment among the plurality of time-frequency resource subsets belong to the Q1 control channel candidates, where N5 is a positive integer.

[0438] As an example, the statement "the order of the start times of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set" means that when the total number of control channel candidates in the first control channel candidate set is greater than the maximum monitoring number, at least one control channel candidate in the N6 time-frequency resource subsets with the latest start time among the plurality of time-frequency resource subsets in the first control channel candidate set is not monitored, where N6 is a positive integer, and the total number of control channel candidates in the first control channel candidate set other than the at least one control channel candidate in the N6 time-frequency resource subsets with the latest start time is not greater than the maximum monitoring number.

[0439] As an example, the maximum number of monitoring items does not include the number of monitoring items required for the CSS collection.

[0440] As an example, the maximum number of monitoring items only includes the number of monitoring items required by the USS set.

[0441] As an example, all control channel candidates included in the entire CSS set in the first control channel candidate set belong to the Q1 control channel candidates.

[0442] As an example, all control channel candidates included in at least one CSS set other than the CSS set associated with DCI format 2_0 in the first control channel candidate set belong to the Q1 control channel candidates.

[0443] Example 11

[0444] Example 11 illustrates a schematic diagram of the relationship between the duration of a first time interval and the maximum number of monitoring points according to an embodiment of this application, as shown in the attached diagram. Figure 11 As shown. In the appendix Figure 11 In the table, the first column from the left represents the duration of the first time window, and the second column from the left represents the maximum number of monitoring values ​​corresponding to the duration of the first time window in the first column. In Example 11, L0, L1, L2, and L3 represent four different values ​​of the duration of the first time window, and a0, a1, a2, and a3 represent four predefined positive integers, which are associated with L0, L1, L2, and L3 respectively.

[0445] As an example, the maximum number of monitoring is the maximum number of control channel candidates supported within the first time window.

[0446] As one embodiment, the maximum number of monitoring is a maximum number of control channel candidates supported in the first time window.

[0447] As one embodiment, the maximum number of monitoring is a maximum number of control channel candidates corresponding to a maximum number of non-overlapping CCEs supported in the first time window.

[0448] As one embodiment, the maximum number of monitoring is a smaller one between a maximum number of control channel candidates supported in the first time window and a maximum number of control channel candidates corresponding to a maximum number of non-overlapping CCEs supported in the first time window.

[0449] As one embodiment, the expression "a maximum number of control channel candidates corresponding to a maximum number of non-overlapping CCEs" includes a maximum number of control channel candidates that can be monitored in time-frequency resources represented by the maximum number of non-overlapping CCEs.

[0450] As one embodiment, the maximum number of monitoring is determined by a table of relationship between a time length of the first time window and the maximum number of monitoring.

[0451] As one embodiment, a value of the maximum number of monitoring is one of {20, 22, 36, 44}.

[0452] As one embodiment, a value of the maximum number of monitoring is one of {28, 30, 44, 52}.

[0453] As one embodiment, a value of the maximum number of monitoring is one of {36, 38, 52, 60}.

[0454] As one embodiment, the maximum number of monitoring is determined by a function of a time length of the first time window and the maximum number of monitoring.

[0455] As one embodiment, the maximum number of monitoring is used only for allocation of control channel candidates of a USS set.

[0456] As one embodiment, the maximum number of monitoring is not used for allocation of control channel candidates of a CSS set.

[0457] As one embodiment, the maximum number of monitoring is a remaining number of control channel candidates after a number of control channel candidates included in a CSS set is allocated.

[0458] Example 12

[0459] Embodiment 12 illustrates a schematic diagram of a channel access detection, a COT and a second information block, according to an embodiment of the present application, as shown in FIG. 12. In Embodiment 12, the starting time of the COT is after the ending time of the channel access detection, and the time-frequency resource of the second information block belongs to the COT in time domain. Figure 12

[0460] As an embodiment, the second information block is used to determine a time length of a Channel Occupancy Time (COT).

[0461] As an embodiment, the channel access detection is used to determine a time length of the COT.

[0462] As an embodiment, the channel access detection is used to determine a starting time of the COT.

[0463] As an embodiment, the channel access detection is used to determine a frequency domain resource occupied by the COT.

[0464] As an embodiment, the channel access detection is performed by the second node.

[0465] As an embodiment, the channel access detection is performed by the first node.

[0466] As an embodiment, the channel access detection is performed by the first node and the second node jointly.

[0467] As an embodiment, the channel access detection comprises a Channel Access Procedure.

[0468] As an embodiment, the channel access detection comprises a Channel Access Procedure for unlicensed spectrum.

[0469] As an embodiment, the channel access detection comprises a Type 1 uplink Channel Access Procedure, the definition of which is referred to 3GPP TS 37.213.

[0470] As an embodiment, the channel access detection comprises a Type 1 downlink Channel Access Procedure, the definition of which is referred to 3GPP TS 37.213.

[0471] ​As one embodiment, the channel access detection comprises a Type 2 uplink channel access procedure (Channel Access Procedure), the definition of which is referred to 3GPP TS 37.213.

[0472] As one embodiment, the channel access detection comprises a Type 2 downlink channel access procedure (Channel Access Procedure), the definition of which is referred to 3GPP TS 37.213.

[0473] As one embodiment, the channel access detection comprises LBT.

[0474] As one embodiment, the channel access detection comprises a fourth category of LBT (Cat 4 LBT).

[0475] As one embodiment, the channel access detection comprises a second category of LBT (Cat 2 LBT).

[0476] As one embodiment, the channel access detection comprises omni-directional LBT.

[0477] As one embodiment, the channel access detection comprises quasi-omni-directional LBT.

[0478] As one embodiment, the channel access detection comprises directional LBT.

[0479] As one embodiment, the channel access detection comprises a first type of monitoring for a positive integer number of times.

[0480] As one embodiment, the first type of monitoring comprises one energy detection.

[0481] As one embodiment, the first type of monitoring comprises multiple energy detections.

[0482] As one embodiment, the first type of monitoring comprises coherent detection.

[0483] As one embodiment, the first type of monitoring comprises CRC check.

[0484] As one embodiment, the first type of monitoring comprises interference sensing.

[0485] As one embodiment, the duration of the first type of monitoring is a sensing slot duration, the definition of which is referred to 3GPP TS 37.213.

[0486] As one embodiment, there is no time interval between the channel access detection and the COT.

[0487] As one embodiment, there is a time interval between the channel access detection and the COT.

[0488] As one embodiment, the starting time of the COT is not earlier than the ending time of the channel access detection.

[0489] As one embodiment, the channel access detection comprises positive integer times of energy detection, when the number of times of energy detection with channel idle in the positive integer times of energy detection is not less than a first number threshold, the second node transmits wireless signal in the COT; when the number of times of energy detection with channel idle in the positive integer times of energy detection is less than the first number threshold, the second node does not transmit wireless signal; the first number threshold is a positive integer.

[0490] Example 13

[0491] Embodiment 13 illustrates a structure block diagram of a processing device in the first node of one embodiment, as shown in FIG. 13. Figure 13 In FIG. 13, the first node processing device 1300 comprises a first receiver 1301 and a second receiver 1302. Figure 13

[0492] As one embodiment, the first receiver 1301 comprises at least one of the antenna 452, the transmitter / receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460 and the data source 467 in the application attached Figure 4

[0493] As one embodiment, the second receiver 1302 comprises at least one of the antenna 452, the transmitter / receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460 and the data source 467 in the application attached Figure 4

[0494] ​​​In embodiment 13, the first receiver 1301 receives a first information block and monitors a second information block; the second receiver 1302 monitors Q1 control channel alternatives, the Q1 being a positive integer greater than 1; wherein the first information block is used to determine a first control channel alternative set, the first control channel alternative set comprising a plurality of control channel alternatives; any one of the control channel alternatives comprised in the first control channel alternative set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised in the first time-frequency resource set belong to a first time window in time domain; a time length of the first time window is one of Q2 time window length alternatives, the Q2 being a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length alternatives; any one of the Q1 control channel alternatives belongs to the first control channel alternative set, the Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; and the time length of the first time window is used to determine the maximum monitoring number.

[0495] As an embodiment, the first node 1300 is a user equipment.

[0496] As an embodiment, the first node 1300 is a relay node.

[0497] As an embodiment, the first node 1300 is a base station.

[0498] As an embodiment, the first node 1300 is a vehicle-mounted communication device.

[0499] As an embodiment, the first node 1300 is a user equipment supporting V2X communication.

[0500] As an embodiment, the first node 1300 is a relay node supporting V2X communication.

[0501] As an embodiment, the first node 1300 is a base station device supporting IAB.

[0502] Example 14

[0503] Embodiment 14 illustrates a structural block diagram of a processing apparatus in a second node of an embodiment, as shown in FIG. 14. Figure 14 In the embodiment, the second node processing apparatus 1400 comprises a first transmitter 1401 and a second transmitter 1402. Figure 14

[0504] As an embodiment, the first transmitter 1401 comprises the structural block diagram of the first transmitter 1301 in the first node 1300 of the embodiment. Figure 4 ​at least one of the antennas 420, the transceiver 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller / processor 475, and the memory 476.

[0505] As one embodiment, the second transmitter 1402 includes at least one of the antennas 420, the transceiver 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller / processor 475, and the memory 476. Figure 4 at least one of the antennas 420, the transceiver 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller / processor 475, and the memory 476.

[0506] In embodiment 12, the first transmitter 1401 transmits a first information block and determines a second information block, the second transmitter 1402 determines Q1 control channel candidates, the Q1 being a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set including a plurality of control channel candidates; any one of the control channel candidates included in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources included in the first time-frequency resource set belong to a first time window in time domain; the time length of the first time window is one of Q2 time window length candidates, the Q2 being a positive integer greater than 1; whether the second information block is transmitted is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, the Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number.

[0507] As one embodiment, the second information block is used to determine the time length of a Channel Occupancy Time (COT).

[0508] As one embodiment, the first information block is used to determine Q3 search space sets, the Q3 being a positive integer, any one of the Q3 search space sets including at least one control channel candidate; the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, the Q4 being a positive integer not greater than Q3; any one of the Q1 control channel candidates belongs to one of the Q4 search space sets.

[0509] As one embodiment, the first time-frequency resource set comprises a plurality of time-frequency resource subsets, any time-frequency resource subset of the plurality of time-frequency resource subsets is associated to at least one control channel candidate, and the order of starting time instants of the plurality of time-frequency resource subsets is used to determine the Ql control channel candidates from the first control channel candidate set.

[0510] As one embodiment, if the second information block is not transmitted, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate is one of the Q2 time window length candidates, and the Q3 search space sets indicated by the first information block are used to determine the first time window length candidate.

[0511] As one embodiment, the first transmitter 1401 transmits a third information block, the third information block is used to determine a second time window length candidate, the second time window length candidate is one of the Q2 time window length candidates, and if the second information block is transmitted, the time length of the first time window is equal to the second time window length candidate.

[0512] As one embodiment, if the second information block is transmitted, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

[0513] As one embodiment, the second node 1400 is a user equipment.

[0514] As one embodiment, the second node 1400 is a relay node.

[0515] As one embodiment, the second node 1400 is a base station.

[0516] As one embodiment, the second node 1400 is a vehicle-mounted communication device.

[0517] As one embodiment, the second node 1400 is a user equipment supporting V2X communication.

[0518] As one embodiment, the second node 1400 is a relay node supporting V2X communication.

[0519] As one embodiment, the second node 1400 is a base station device supporting IAB.

[0520] As one embodiment, for any embodiment of the phrase “whether the second information block is detected” in the present application, the embodiment after replacing the phrase “whether the second information block is detected” with “whether the second information block is transmitted” can be used for the second node.

[0521] As an embodiment, for any occurrence of the phrase "a second information block is detected" in this application, the embodiment after replacing the phrase "a second information block is detected" with "a second information block is sent" can be used for the second node.

[0522] As an embodiment, for any occurrence of the phrase "a second information block is not detected" in this application, the embodiment after replacing the phrase "a second information block is not detected" with "a second information block is not sent" can be used for the second node.

[0523] Those skilled in the art can understand that all or part of the steps in the foregoing method can be instructed by a program to the relevant hardware, and the program can be stored in a computer readable storage medium, such as a read-only memory, a hard disk, or an optical disk. Alternatively, all or part of the steps of the foregoing embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the foregoing embodiments can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of combination of software and hardware. The first node or the second node or the UE or the terminal in the present application includes but is not limited to a mobile phone, a tablet computer, a notebook computer, a network card, a low-power device, an eMTC device, an NB-IoT device, a vehicle-mounted communication device, a flying vehicle, an airplane, a drone, a remote control airplane, and other wireless communication devices. The base station device or the base station or the network side device in the present application includes but is not limited to a macro cellular base station, a micro cellular base station, a home base station, a relay base station, an eNB, a gNB, a transmission reception point TRP, a relay satellite, a satellite base station, an air base station, and other wireless communication devices.

[0524] The above describes only the preferred embodiments of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node configured for wireless communication, the first node comprising: comprises: a first receiver configured to receive a first information block and monitor a second information block; a second receiver configured to monitor Q1 control channel candidates, wherein Q1 is a positive integer greater than 1; wherein the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprises a plurality of control channel candidates, any one of the control channel candidates comprised in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set, the time-frequency resources comprised in the first time-frequency resource set belong to a first time window in time domain, a time length of the first time window is one of Q2 time window length candidates, Q2 is a positive integer greater than 1, whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates, any one of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 is not greater than a maximum monitoring number, the maximum monitoring number is a positive integer, the time length of the first time window is used to determine the maximum monitoring number, the maximum monitoring number is a smaller one of a maximum number of the control channel candidates supported in the first time window and a maximum number of the control channel candidates corresponding to a maximum number of non-overlapping CCEs supported in the first time window.

2. The first node according to claim 1, characterized by, the second information block is used to determine a time length of a channel occupancy time (COT).

3. The first node according to claim 1 or 2, characterized by, the first information block is used to determine Q3 search space sets, Q3 is a positive integer, any one of the Q3 search space sets comprises at least one control channel candidate, the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, Q4 is a positive integer not greater than Q3, any one of the Q1 control channel candidates belongs to one of the Q4 search space sets.

4. A first node according to any one of claims 1 to 3, characterized by, the first time-frequency resource set comprises a plurality of time-frequency resource subsets, any one of the time-frequency resource subsets is associated to at least one control channel candidate, a sequence of starting time points of the time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set.

5. The first node of any of claims 1 to 4, wherein, if the second information block is not detected, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate is one of the Q2 time window length candidates, the Q3 search space sets indicated by the first information block are used to determine the first time window length candidate.

6. The first node of any one of claims 1 to 5, comprising: The first receiver receives a third information block, the third information block being used to determine a second time window length candidate, the second time window length candidate being one of the Q2 time window length candidates; and if the second information block is detected, the time length of the first time window is equal to the second time window length candidate.

7. A first node according to any one of claims 1 to 6, characterized by, If the second information block is detected, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

8. A second node configured for wireless communication, the second node comprising: The first transmitter transmits a first information block and determines a second information block; The second transmitter determines Q1 control channel candidates, Q1 being a positive integer greater than 1; The first information block is used to determine a first control channel candidate set, the first control channel candidate set including a plurality of control channel candidates; any control channel candidate included in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources included in the first time-frequency resource set belong to a first time window in the time domain; the time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is transmitted is used to determine the time length of the first time window from the Q2 time window length candidates; any control channel candidate of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number; the maximum monitoring number is the smaller one of a maximum number of control channel candidates corresponding to a maximum number of non-overlapping CCEs supported in the first time window and a maximum number of control channel candidates.

9. The second node of claim 8, wherein The second information block is used to determine the time length of a channel occupancy time (COT). The first information block is used to determine Q3 search space sets, Q3 being a positive integer, any search space set of the Q3 search space sets including at least one control channel candidate; the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, Q4 being a positive integer not greater than Q3; any control channel candidate of the Q1 control channel candidates belongs to one of the Q4 search space sets.

10. The second node of claim 8 or 9, characterized by, The first time-frequency resource set includes a plurality of time-frequency resource subsets, any time-frequency resource subset of the plurality of time-frequency resource subsets being associated to at least one control channel candidate, and the order of the starting time of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set.

11. The second node according to any of claims 8 to 10, characterized by, ​ 12. The second node according to any of claims 8 to 11, characterized by, If the second information block is not transmitted, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate being one of the Q2 time window length candidates, the Q3 search space sets indicated by the first information block being used to determine the first time window length candidate.

13. The second node of any of claims 8 to 12, wherein, comprising: the first transmitter, transmitting a third information block; the third information block being used to determine a second time window length candidate, the second time window length candidate being one of the Q2 time window length candidates; if the second information block is transmitted, the time length of the first time window being equal to the second time window length candidate.

14. The second node of any of claims 8 to 13, wherein, If the second information block is transmitted, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

15. A method for a first node used for wireless communication, the method comprising: comprising: receiving a first information block and monitoring a second information block; monitoring Q1 control channel candidates, the Q1 being a positive integer greater than 1; wherein, the first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any one control channel candidate comprised by the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources comprised by the first time-frequency resource set belong to a first time window in time domain; the time length of the first time window is one of Q2 time window length candidates, the Q2 being a positive integer greater than 1; whether the second information block is detected is used to determine the time length of the first time window from the Q2 time window length candidates; any one of the Q1 control channel candidates belongs to the first control channel candidate set, the Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number; the maximum monitoring number is the smaller one of a maximum number of the control channel candidates supported in the first time window and a maximum number of the control channel candidates corresponding to a maximum number of non-overlapping CCEs supported in the first time window.

16. The method of the first node according to claim 15, wherein, the second information block is used to determine a time length of a Channel Occupancy Time (COT).

17. A method of a first node according to claim 15 or 16, characterized by, the first information block is used to determine Q3 search space sets, the Q3 being a positive integer, any one of the Q3 search space sets comprising at least one control channel candidate; the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, the Q4 being a positive integer not greater than Q3; any one of the Q1 control channel candidates belongs to one of the Q4 search space sets.

18. The method of a first node according to any of claims 15 to 17, wherein, The first time-frequency resource set comprises a plurality of time-frequency resource subsets, any time-frequency resource subset of the plurality of time-frequency resource subsets is associated to at least one control channel candidate, and the order of starting time points of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set.

19. The method of a first node according to any of claims 15 to 18, wherein, If the second information block is not detected, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate is one of the Q2 time window length candidates, and the Q3 search space sets indicated by the first information block are used to determine the first time window length candidate.

20. The method of a first node according to any of claims 15 to 19, wherein, Comprise: Receiving a third information block; The third information block is used to determine a second time window length candidate, the second time window length candidate is one of the Q2 time window length candidates, and if the second information block is detected, the time length of the first time window is equal to the second time window length candidate.

21. The method of a first node according to any of claims 15 to 20, wherein, If the second information block is detected, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

22. A method for a second node used for wireless communication, the method comprising: Comprise: Sending a first information block and determining a second information block; Determining Q1 control channel candidates, Q1 being a positive integer greater than 1; The first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any control channel candidate included in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources included in the first time-frequency resource set belong to a first time window in the time domain; the time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is sent is used to determine the time length of the first time window from the Q2 time window length candidates; any control channel candidate of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number; the maximum monitoring number is the smaller one of the maximum number of control channel candidates supported in the first time window and the maximum number of control channel candidates corresponding to the maximum number of non-overlapping CCEs supported in the first time window.

23. A method of a second node according to claim 22, wherein, The second information block is used to determine the time length of a channel occupancy time (COT). The first time-frequency resource set comprises a plurality of time-frequency resource subsets, any time-frequency resource subset of the plurality of time-frequency resource subsets is associated to at least one control channel candidate, and the order of starting time points of the plurality of time-frequency resource subsets is used to determine the Q1 control channel candidates from the first control channel candidate set. If the second information block is not detected, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate is one of the Q2 time window length candidates, and the Q3 search space sets indicated by the first information block are used to determine the first time window length candidate. Comprise: Receiving a third information block; The third information block is used to determine a second time window length candidate, the second time window length candidate is one of the Q2 time window length candidates, and if the second information block is detected, the time length of the first time window is equal to the second time window length candidate. If the second information block is detected, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate. Comprise: Sending a first information block and determining a second information block; Determining Q1 control channel candidates, Q1 being a positive integer greater than 1; The first information block is used to determine a first control channel candidate set, the first control channel candidate set comprising a plurality of control channel candidates; any control channel candidate included in the first control channel candidate set occupies time-frequency resources belonging to a first time-frequency resource set; the time-frequency resources included in the first time-frequency resource set belong to a first time window in the time domain; the time length of the first time window is one of Q2 time window length candidates, Q2 being a positive integer greater than 1; whether the second information block is sent is used to determine the time length of the first time window from the Q2 time window length candidates; any control channel candidate of the Q1 control channel candidates belongs to the first control channel candidate set, Q1 not being greater than a maximum monitoring number, the maximum monitoring number being a positive integer; the time length of the first time window is used to determine the maximum monitoring number; the maximum monitoring number is the smaller one of the maximum number of control channel candidates supported in the first time window and the maximum number of control channel candidates corresponding to the maximum number of non-overlapping CCEs supported in the first time window. The second information block is used to determine the time length of a channel occupancy time (COT).

24. A method of a second node according to claim 22 or 23, wherein, The first information block is used to determine Q3 search space sets, Q3 being a positive integer, any search space set of the Q3 search space sets comprising at least one control channel candidate; the maximum monitoring number is used to determine Q4 search space sets from the Q3 search space sets, Q4 being a positive integer not greater than Q3; any control channel candidate of the Q1 control channel candidates belongs to one of the Q4 search space sets.

25. The method of a second node according to any of claims 22 to 24, wherein, The first time-frequency resource set comprises a plurality of time-frequency resource subsets, any time-frequency resource subset of the plurality of time-frequency resource subsets being associated to at least one control channel candidate, the order of starting time of the plurality of time-frequency resource subsets being used to determine the Q1 control channel candidates from the first control channel candidate set.

26. The method of a second node according to any of claims 22 to 25, wherein, If the second information block is not transmitted, the time length of the first time window is equal to a first time window length candidate, the first time window length candidate being one of the Q2 time window length candidates, the Q3 search space sets indicated by the first information block being used to determine the first time window length candidate.

27. The method of a second node according to any of claims 22 to 26, wherein, comprises: transmitting a third information block, the third information block being used to determine a second time window length candidate, the second time window length candidate being one of the Q2 time window length candidates; if the second information block is transmitted, the time length of the first time window is equal to the second time window length candidate.

28. The method of a second node according to any of claims 22 to 27, wherein, If the second information block is transmitted, the time length of the first time window is equal to the larger one of the first time window length candidate and the second time window length candidate.

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