Electronic device and method for wireless communication, and computer-readable storage medium

Abstract

The present disclosure provides an electronic device, method and computer-readable storage medium for wireless communication, the electronic device comprising: a processing circuit configured to: determine that a beam failure event of a downlink on an unlicensed frequency band has occurred; and in a beam failure recovery process for the beam failure event, perform uplink transmission based on channel idle detection with reduced delay on the unlicensed frequency band.

Description

[0001] This application claims priority to a Chinese patent application filed with the Chinese Patent Office on November 8, 2019, with application number 201911088211.4 and invention name “Electronic device and method for wireless communication, computer-readable storage medium”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the field of wireless communication technology, and in particular to a beam failure recovery technology in an unlicensed frequency band, and more particularly to an electronic device and method for wireless communication and a computer-readable storage medium. Background Art

[0003] New Radio (NR) is the next generation of wireless access for Long Term Evolution (LTE), and is a radio access technology (RAT) different from LTE. Multiple In Multiple Output (MIMO) technology can also be used in NR. In NR MIMO, beam management is very important for ensuring communication quality. For example, when the quality of the beam serving the user equipment (UE) drops to a certain level, the beam becomes unavailable and a beam failure is considered to have occurred. At this time, a beam failure recovery (BFR) mechanism is needed to reallocate a new beam for data transmission of the user equipment.

[0004] In addition, on unlicensed bands, before accessing a channel, a user device needs to first perform a channel idle detection, such as the Listen Before Talk (LBT) mechanism, to determine that the channel is idle, thereby ensuring that there will be no conflict with other user devices after access. The New Radio (NR-U) system on unlicensed bands can also use carrier aggregation (CA) technology. Summary of the invention

[0005] A brief overview of the disclosure is given below in order to provide a basic understanding of certain aspects of the disclosure. It should be understood that this overview is not an exhaustive overview of the disclosure. It is not intended to identify key or important parts of the disclosure, nor is it intended to limit the scope of the disclosure. Its purpose is simply to give certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0006] According to one aspect of the present application, an electronic device for wireless communication is provided, comprising: a processing circuit configured to: determine that a beam failure event of a downlink on an unlicensed frequency band has occurred; and in a beam failure recovery process for the beam failure event, perform an uplink transmission based on channel idle detection with reduced delay on the unlicensed frequency band.

[0007] According to one aspect of the present application, a method for wireless communication is provided, comprising: determining that a beam failure event of a downlink on an unlicensed frequency band has occurred; and in a beam failure recovery process for the beam failure event, performing an uplink transmission based on channel idle detection with reduced delay on the unlicensed frequency band.

[0008] According to another aspect of the present application, an electronic device for wireless communication is provided, including: a processing circuit configured to: determine a setting for channel idle detection with reduced delay for uplink transmission to be performed by a user equipment on an unlicensed frequency band in a beam failure recovery process for a beam failure event for a downlink on an unlicensed frequency band; and provide the setting to the user equipment.

[0009] According to another aspect of the present application, a method for wireless communication is provided, including: determining a setting for channel idle detection with reduced delay for uplink transmission to be performed by a user equipment on an unlicensed frequency band in a beam failure recovery process for a beam failure event for a downlink on an unlicensed frequency band; and providing the setting to the user equipment.

[0010] The electronic device and method according to the present application can effectively reduce the delay of beam fault recovery in the unlicensed frequency band by reducing the delay of channel idle detection in the unlicensed frequency band.

[0011] According to other aspects of the present invention, there are also provided computer program codes and computer program products for implementing the above method for wireless communication, and a computer-readable storage medium having the computer program codes for implementing the above method for wireless communication recorded thereon.

[0012] These and other advantages of the present invention will become more apparent through the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to further illustrate the above and other advantages and features of the present invention, the specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. The accompanying drawings together with the following detailed description are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only describe typical examples of the present invention and should not be regarded as limiting the scope of the present invention. In the accompanying drawings:

[0014] Figure 1 A functional module block diagram of an electronic device for wireless communication according to an embodiment of the present application is shown;

[0015] Figure 2 A schematic diagram showing the signaling interactions of the BFR process;

[0016] Figure 3 A schematic example of COT for downlink transmission of a UE sharing a base station is shown;

[0017] Figure 4 An example of downlink LBT access priority is shown;

[0018] Figure 5 An example of uplink LBT access priority is shown;

[0019] Figure 6 A functional module block diagram of an electronic device for wireless communication according to an embodiment of the present application is shown;

[0020] Figure 7 An illustrative example of dynamically reducing the listening window of LBT is shown;

[0021] Figure 8 A schematic example of the size of the contention window of LBT is shown;

[0022] Fig. 9 An example of BFR when beam failure occurs again is shown;

[0023] Fig.10 A schematic example of the previous L idle channel assessments is shown;

[0024] Fig.11 An illustrative example of a UE periodically performing CCA and obtaining a CCA result is shown;

[0025] Fig.12 An example of bonding is shown;

[0026] Fig.13 A functional module block diagram of an electronic device for wireless communication according to another embodiment of the present application is shown;

[0027] Fig.14 A flow chart of a method for wireless communication according to an embodiment of the present application is shown;

[0028] Fig.15 A flowchart of a method for wireless communication according to another embodiment of the present application is shown;

[0029] Fig.16 is a block diagram showing a first example of a schematic configuration of an eNB or gNB to which the technology of the present disclosure can be applied;

[0030] Fig.17 is a block diagram showing a second example of a schematic configuration of an eNB or gNB to which the technology of the present disclosure can be applied;

[0031] Fig.18 is a block diagram showing an example of a schematic configuration of a smartphone to which the technology of the present disclosure can be applied;

[0032] Fig.19 is a block diagram showing an example of a schematic configuration of a car navigation device to which the technology of the present disclosure can be applied; and

[0033] Fig. 20 is a block diagram of an exemplary structure of a general personal computer in which the method and / or apparatus and / or system according to the embodiments of the present invention can be implemented. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present invention will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the present disclosure.

[0035] It is also necessary to explain here that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0036] <First Embodiment>

[0037] As mentioned above, transmission on the unlicensed frequency band requires the execution of channel idle detection such as the LBT mechanism first, which introduces additional delays, increasing the delay of the BFR process. In the NR-U system using CA, the probability of executing BFR is further increased. For example, for a secondary cell (scell) without an uplink (UL), the primary cell (pcell) can execute BFR, while for a scell with UL, the scell itself can execute BFR. When a beam failure occurs in the downlink (DL) of the unlicensed frequency band, BFR in both cases will produce a large delay. This embodiment provides a technique for reducing this delay.

[0038] Figure 1 FIG. 1 shows a functional module block diagram of an electronic device 100 for wireless communication according to an embodiment of the present application. Figure 1 As shown, the electronic device 100 includes: a determination unit 101, configured to determine that a beam failure event of a downlink on an unlicensed frequency band has occurred; and an execution unit 102, configured to perform uplink transmission based on channel idle detection with reduced delay on the unlicensed frequency band in a beam failure recovery process for the beam failure event.

[0039] The determination unit 101 and the execution unit 102 may be implemented by one or more processing circuits, which may be implemented as a chip, for example. Figure 1 The various functional units in the device shown in the figure are only logical modules divided according to the specific functions implemented by them, and are not used to limit the specific implementation method.

[0040] The electronic device 100 can be arranged on the user equipment (UE) side or can be communicatively connected to the UE. Here, it should also be noted that the electronic device 100 can be implemented at the chip level, or it can also be implemented at the device level. For example, the electronic device 100 can work as the user equipment itself, and can also include external devices such as memory, transceiver (not shown in the figure). The memory can be used to store programs and related data information that need to be executed by the user equipment to implement various functions. The transceiver may include one or more communication interfaces to support communication with different devices (e.g., base stations, other user equipment, etc.), and the implementation form of the transceiver is not specifically limited here. The same applies to the subsequent description of other configuration examples of electronic devices on the user equipment side.

[0041] For the downlink of the unlicensed frequency band, the determination unit 101 detects the beam quality of the current serving beam to determine whether it meets the triggering condition of the beam failure event, and when the judgment is yes, determines that the beam failure event occurs. Subsequently, BFR-related signaling transmission is performed between the UE and the base station (e.g., eNB), such as Figure 2 As shown. First, the UE sends a beam failure indication (BFI) to the base station to report the occurrence of a beam failure event. After receiving the BFI, the base station sends a BFI response to the UE, such as an uplink grant (UL grant) for the UE. After receiving the BFI response, the UE sends a beam failure recovery request (BFRQ) to the base station. The BFRQ may include, for example, information about identifying the UE and candidate beams as beam switching targets. Next, the UE monitors the response to the BFRQ from the base station within a specific time window, namely, the Beam Failure Recovery Request Response (BFRR), and the BFR is completed. Due to Figure 2 Uplink transmissions such as BFI transmission and BFRQ transmission are performed in unlicensed frequency bands, so channel idle detection such as LBT needs to be performed before transmission to detect whether the current channel is used by other UEs. And only when the channel is detected to be idle can the UE perform the corresponding uplink transmission. There is a similar situation for downlink transmission of the base station.

[0042] It can be seen that compared with the BFR in the licensed band, the BFR in the unlicensed band needs to perform channel idle detection before sending signaling to the base station, so the delay of uplink transmission increases, thereby further increasing the delay of the BFR process. In this embodiment, the delay of the BFR process is reduced by reducing the delay of the channel idle detection. Note that in the following description, LBT will be used as an example of channel idle detection, but this is not restrictive.

[0043] In one example, the execution unit 102 is configured to perform uplink transmission without channel idle detection by sharing the channel occupancy time (COT) of the downlink transmission of the base station before the uplink transmission. In other words, the UE can share the COT of the downlink transmission of the base station. For example, referring to Figure 2 , the uplink transmission may be sending a BFRQ to the base station, and the downlink transmission of the base station may be sending a BFI response to the UE.

[0044] In this example, the UE does not need to perform channel idle detection when sending a BFRQ, but shares the COT of the base station sending a BFI response, such as Figure 3 As shown in FIG. 1 , LBT is not performed before sending BFRQ.

[0045] The length of the COT that can be shared depends on the LBT access priority of the base station. Figure 4 An example of downlink LBT access priority is shown. Figure 5 An example of uplink LBT access priority is shown. mcot,p Indicates the maximum time that the frequency band can be occupied after completing an LBT. It can be seen that when the LBT access priority is higher, the allowed contention window CW p The smaller the size of , that is, the shorter the time taken for LBT, so that the base station or UE can access the channel faster, but the smaller its COT length.

[0046] The access priority of LBT executed by UE can be assigned by the base station or selected by the UE itself. For BFI signaling, since it is carried by the Physical Uplink Control Channel (PUCCH) and PUCCH often has a higher priority, the LBT access priority of BFI signaling is often higher. Figure 4 The priority level 1 shown in enables the UE to inform the base station of the fact that beam failure has occurred as quickly as possible.

[0047] Exemplarily, the LBT priority of the BFI response can be one of 2-4. In this way, on the one hand, the duration of the LBT to be performed on the access channel is considered, and on the other hand, the COT after successful access is considered, so that the delay of the BFR process can be reduced when the UE shares the COT of the BFI response.

[0048] After receiving the BFRQ from the UE, if the candidate beam reported by the user is available, the base station should reply the BFRR to the UE as soon as possible, so that an LBT with a higher access priority, such as an LBT with a priority of 1, can be selected.

[0049] It should be noted that the above selection of LBT access priority is merely exemplary and not restrictive.

[0050] In addition, the UE may also obtain an indication of the length of the COT of the downlink transmission that can be shared from the base station. In one example, the UE obtains the indication via Radio Resource Control (RRC) signaling. The indication may include, for example, information about the length of the COT, or information about the downlink LBT access priority, and the UE determines the length of the COT that can be shared based on the priority information. Accordingly, Figure 6As shown, the electronic device 100 may further include an acquisition unit 103 configured to acquire the indication from the base station.

[0051] According to this embodiment, the electronic device 100 can reduce the delay of the BFR of the downlink in the unlicensed frequency band by sharing the COT of the downlink transmission of the base station without having to perform the LBT for the uplink transmission.

[0052] <Second Embodiment>

[0053] In this embodiment, the execution unit 102 may be configured to perform uplink transmission based on CID with reduced latency by dynamically reducing the duration of CID. For example, when CID is LBT, the execution unit 102 may dynamically determine the size of the contention window.

[0054] In other words, the execution unit 102 can dynamically reduce the size of the contention window in the LBT, thereby reducing the delay caused by the LBT. The size of the contention window determines the size of the window that the LBT is to monitor. Figure 7 An illustrative example of dynamically reducing the listening window of LBT is shown. Figure 7 The uplink transmission BFRQ is taken as an example, but this is not restrictive.

[0055] Exemplarily, the size of the contention window of LBT can be determined by Figure 5 The parameter CWp shown in is limited. In Cat-4 LBT, the Initial Clear Channel Assessment (ICCA) is first performed. If the channel is not detected to be occupied in the ICCA stage, the LBT ends and the data is sent directly; otherwise, the Extended Clear Channel Assessment (ECCA) fallback stage is entered. In this stage, a counter with an initial value of N is set, and a CCA within a predetermined duration is performed after a period of fallback. If the channel is detected to be idle according to the CCA, the counter is reduced by 1 until the counter is 0. When the counter is reduced to 0, the LBT ends and data transmission can be performed. Among them, N is a random number uniformly distributed between 0 and CWp. Therefore, the value of CWp determines the size of the contention window of LBT, and the execution unit 102 can change the size of the contention window of LBT by dynamically changing the value of CWp.

[0056] The execution unit 102 may adopt various methods to dynamically determine the size of the contention window of the LBT. In one example, the base station may configure multiple contention window sizes for the UE via RRC signaling, for example, configuring an array including multiple optional CW pThe UE can select a CW from the array according to a predetermined rule. p value, and based on the selected CW p The value determines the size of the LBT contention window, such as the above N value.

[0057] Exemplarily, the values ​​in the array are decreasing in sequence, and the execution unit 102 is configured to use the number of occurrences of the beam failure event as the sequence number, and determine a corresponding value from the array of candidates for the size of the contention window of the LBT as the size of the contention window of the LBT. For example, when the beam failure occurs for the first time, the first value is used, when the beam failure occurs for the second time, the second value is used, and so on. This method is also referred to as the enumeration method below.

[0058] Figure 8 FIG. 4 shows an exemplary embodiment of the size of the contention window. Assume that the CW configured by the base station for the UE is p For example, the array is CW p =[511, 255, 63, 31, 15], Figure 8 The figure shows the BFR process when the beam failure occurs for the first time. At this time, the waiting time required for uplink transmission is N*T. d (T d is the delay period), where N is a random number in the interval (0, 511], Figure 8 In the example of , N is 5.11 and 2.12 respectively. When the beam failure occurs again and the beam idleness meets the predetermined condition, the value range of N will be (0, 2.12], and so on. Fig. 9 An example of BFR when beam failure occurs again is shown, where N is 138 and 58 respectively. It can be seen that the delay of LBT will be reduced compared to when beam failure occurs for the first time.

[0059] In another example, the base station only configures the initial size of the contention window for the UE, and the execution unit 102 attenuates the initial value of the size of the contention window of the LBT according to a predetermined rule based on the number of occurrences of the beam failure event to determine the size of the contention window of the LBT. The predetermined rule may be a default rule or may be indicated by the base station through RRC signaling. The predetermined rule, for example, includes a rule indicating how to attenuate. Among them, the attenuation may include, for example, exponential attenuation or multiple attenuation. In the case where the attenuation includes exponential attenuation, the predetermined rule may, for example, indicate the form of the corresponding exponential function such as the base of the exponential function. In the case where the attenuation includes multiple attenuation, the predetermined rule may, for example, include a specific multiple value p, where p is a natural number greater than 1. This method is also referred to as the rule method hereinafter.

[0060] Still Figure 8 For example, when CW pWhen multiple attenuation is used, if the initial CW p is 511, then when beam failure occurs again, the value range of N will become (0, 511 / p], and so on. That is, CW p is the CW of LBT at the time of the previous beam failure p 1 / p of.

[0061] It should be understood that the method of dynamically reducing the size of the contention window of LBT is not limited to the above example.

[0062] In the above example, it is described that the execution unit 102 dynamically reduces the size of the contention window of LBT based on the number of occurrences of beam failure events, wherein, when the beam failure event occurs multiple times, the size of the contention window of LBT can be appropriately reduced so that the beam failure can be quickly recovered, thereby improving the user experience.

[0063] In addition, the execution unit 102 can also determine the size of the contention window of the LBT based on the historical status of the channel idle detection. For example, when it is inferred that the channel is relatively idle and the probability of successfully accessing the channel is high based on the historical status of the channel idle detection, the contention window of the LBT can be appropriately reduced to avoid unnecessary waiting, thereby reducing the delay. For example, when a beam failure event occurs again, the execution unit 102 can change the size of the contention window of the LBT for uplink transmission to 1 / p of the contention window of the LBT for uplink transmission during the last beam failure, where p is a natural number greater than 1 and is determined based on the historical status of the channel idle detection. For example, the higher the channel idleness, the larger p. The rule for determining the p value can be configured by the base station, for example.

[0064] Further, the execution unit 102 may also be configured to determine the size of the contention window of the LBT based on the number of occurrences of the beam failure event when it is determined based on the historical status of the channel idle detection that the historical idle degree of the channel meets the predetermined condition. For example, when the historical idle degree of the channel meets the predetermined condition, such as the historical idle degree reaches or exceeds the predetermined degree, the execution unit 102 determines the size of the contention window of the LBT based on the number of beam failures of the current beam failure.

[0065] Exemplarily, the execution unit 102 may set a counter to count the number of beam failure events that occur within a period of time, so as to determine the number of beam failures that occur currently.

[0066] In addition, a memory may be provided to store and update the results of multiple idle channel assessments (CCAs) performed in the past, and the stored results may be used as data reflecting the historical status of channel idle detection. In this case, the execution unit 102 may, for example, determine the historical idleness of the channel based on the ratio of the CCAs whose results indicate passing in the L CCAs performed in the past. The CCA result indicating passing means indicating that the channel is in an idle state, and therefore, the larger the ratio, the higher the historical idleness. The execution unit 102 may be configured to determine that the historical idleness of the channel meets a predetermined condition when the ratio calculated above exceeds a predetermined threshold. L and the predetermined threshold may be configured by the base station.

[0067] The L CCAs may be CCAs performed by the UE when performing previous uplink transmissions before the time node of sending the BFI, such as Fig.10 It should be noted that when using Cat-4 LBT, the CCA mentioned here may include only the CCA in the ICCA stage mentioned above, or may include the CCA in both the ICCA and ECCA stages. If only the CCA in the ICCA stage is included, then L here also represents L uplink transmissions, otherwise one uplink transmission corresponds to multiple CCA results.

[0068] The value of L can be set by the base station through RRC signaling, and its value is determined under the premise of not placing too much burden on the user. For example, when the number of stored CCA results exceeds L, the earliest CCA results are discarded in sequence.

[0069] In addition, in order to make the results of the L CCAs more referenceable, the time range of the results of the CCAs may also be limited. For example, the execution unit 102 is configured to use the results of the CCAs that are within a predetermined reference time range from the current time. If the occurrence time of some of the L CCAs is outside the predetermined reference range, the results of these CCAs are not taken into consideration.

[0070] In addition to borrowing the CCA result of the previous uplink transmission, the UE can also periodically perform CCA and obtain the CCA result, such as Fig.11 As shown. In this way, the UE can calculate the above ratio by querying the recorded periodic CCA results.

[0071] Note that the CCA result of the previous uplink transmission can be used in combination with the method of recording the CCA result by periodically performing CCA. For example, in various situations where a beam failure occurs before the UE has completed L periodic CCAs, or there are not enough CCA results of the previous uplink transmission when a beam failure occurs, the combined method can provide a more accurate reference. Fig.12A combined example is shown, in which the CCA result of the first part is the CCA result of the previous uplink transmission, and the CCA result of the second part is the result of the periodically performed CCA.

[0072] In the combined method, it is also necessary to discard the earliest CCA result to keep L recorded results, wherein the discarded CCA result may be the CCA result of the previous uplink transmission or the periodic CCA result. In addition, the time of the recorded CCA result can also be kept within a predetermined reference time range from the current time.

[0073] In addition, the execution unit 102 can also be configured to determine the historical idleness of the channel based on the average number of CCAs executed in the past L uplink transmissions, and determine that the historical idleness of the channel meets the predetermined condition when the average number of CCAs executed is less than a predetermined number. In the case of Cat-4 LBT, if ICCA indicates that the channel is occupied, the ECCA stage is entered, in which the number of CCAs executed depends on the busyness of the channel. When the channel is busy, it may be necessary to back off for a long time so as to execute more CCAs. Therefore, when the average number of CCAs executed in the past L uplink transmissions is greater than a predetermined number, it means that the channel is relatively busy and is not suitable for reducing the contention window of LBT.

[0074] The L uplink transmissions may be uplink signaling transmissions previously performed by the UE, or LBTs periodically performed by the UE for detection purposes (which may be regarded as virtual uplink transmissions), or a combination of the two, as described above. L and the size of the predetermined number of times may be configured by the base station through RRC signaling.

[0075] Reference Figure 6 The acquisition unit 103 may be configured to acquire an indication for determining the size of the contention window of the LBT from the base station via RRC signaling. The indication may include, for example, one or more of the following: an array of candidates for the size of the contention window of the LBT; a method for reducing the size of the contention window of the LBT and related parameters; parameters for determining whether to reduce the size of the contention window of the LBT; and whether to dynamically reduce the size of the contention window of the LBT.

[0076] Exemplarily, when the indication includes dynamically reducing the size of the contention window of the LBT, if the indication does not include other parameters, the UE performs the dynamic reduction of the contention window of the LBT according to the default setting. When the indication includes not dynamically reducing the size of the contention window of the LBT, the UE does not perform the relevant judgment and operation of dynamically reducing the size of the contention window of the LBT. In addition, it can also be set that when there is no indication of whether to dynamically reduce the size of the contention window of the LBT, the UE performs the dynamic reduction of the contention window of the LBT according to the default setting by default, that is, unless prohibited by the base station, the UE autonomously dynamically reduces the size of the contention window of the LBT.

[0077] For example, the candidate array for the size of the contention window of LBT may include CW p The parameter is an array of candidate values ​​for reducing the size of the contention window of LBT, and the parameter is applicable to the enumeration method for reducing the size of the contention window of LBT. The method for reducing the size of the contention window of LBT is, for example, one of the enumeration method and the rule method. In the case of the rule method, the indication also includes which rule to use and related parameters, such as the multiple attenuation and the multiple value p mentioned above. The parameters used to determine whether to reduce the size of the contention window of LBT include, for example, the various thresholds for evaluating the historical idleness of the channel mentioned above, the historical CCA results as a reference, or the number of historical uplink transmissions, etc.

[0078] According to the present embodiment, the electronic device 100 reduces the delay of LBT by dynamically reducing the size of the contention window of LBT, thereby reducing the delay of BFR of the downlink of the unlicensed frequency band.

[0079] In addition, the electronic devices of the first embodiment and the second embodiment can also be used in combination, that is, the delay of the BFR of the downlink of the unlicensed frequency band can be reduced by both sharing the COT of the downlink transmission of the base station and dynamically reducing the size of the contention window of the LBT.

[0080] <Third Embodiment>

[0081] Fig.13 FIG. 2 shows a functional module block diagram of an electronic device 200 according to another embodiment of the present application. Fig.13 As shown, the electronic device 200 includes: a determination unit 201, configured to determine a setting for a channel idle detection with reduced latency for uplink transmission to be performed by the UE on an unlicensed frequency band in a BFR process for a beam failure event for a downlink on an unlicensed frequency band; and a providing unit 202, configured to provide the setting to the UE.

[0082] The determining unit 201 and the providing unit 202 may be implemented by one or more processing circuits, which may be implemented as a chip, for example. Fig.13The various functional units in the device shown in the figure are only logical modules divided according to the specific functions implemented by them, and are not used to limit the specific implementation method.

[0083] The electronic device 200 can be arranged on the base station side or can be communicatively connected to the base station. Here, it should also be noted that the electronic device 200 can be implemented at the chip level, or it can also be implemented at the device level. For example, the electronic device 200 can work as the base station itself, and can also include external devices such as memory, transceiver (not shown). The memory can be used to store programs and related data information that need to be executed by the base station to implement various functions. The transceiver may include one or more communication interfaces to support communication with different devices (e.g., user equipment, other base stations, etc.), and the implementation form of the transceiver is not specifically limited here.

[0084] For example, in the case where the uplink transmission of the UE can share the COT of the downlink transmission of the base station, the setting may include an indication of the length of the COT of the downlink transmission of the base station before the uplink transmission that the UE can share, and the indication may be, for example, information on the length of the COT or information on the LBT access priority. It is understood that the setting may also include an indication that the uplink transmission of the UE can share the COT of the downlink transmission of the base station.

[0085] In addition, the setting may enable the UE to dynamically reduce the duration of the channel idle detection to perform uplink transmission based on the channel idle detection with reduced latency. The channel idle detection may include LBT, for example, and the setting may be used to determine the size of the contention window of the LBT.

[0086] The setting may include, for example, one or more of the following: an array of candidates for the size of the contention window of the LBT; a method for reducing the size of the contention window of the LBT and related parameters; a parameter for determining whether to reduce the size of the contention window of the LBT; and whether to dynamically reduce the size of the contention window of the LBT. The meaning of each item has been described in detail in the second embodiment and will not be repeated here.

[0087] The providing unit 202 may, for example, include the setting in RRC signaling to provide it to the UE.

[0088] According to this embodiment, the electronic device 200 reduces the delay of LBT by allowing the UE to share the COT of the downlink transmission of the base station without having to perform LBT for uplink transmission, and / or allowing the UE to dynamically reduce the size of the contention window of LBT, thereby reducing the delay of BFR of the downlink in the unlicensed frequency band.

[0089] <Fourth Embodiment>

[0090] In the process of describing the electronic device for wireless communication in the above embodiments, it is obvious that some processes or methods are also disclosed. Below, an overview of these methods is given without repeating some of the details discussed above, but it should be noted that although these methods are disclosed in the process of describing the electronic device for wireless communication, these methods do not necessarily use the components described or are not necessarily performed by those components. For example, the embodiments of the electronic device for wireless communication can be partially or completely implemented using hardware and / or firmware, and the methods for wireless communication discussed below can be completely implemented by a computer executable program, although these methods can also use the hardware and / or firmware of the electronic device for wireless communication.

[0091] Fig.14 A flow chart of a method for wireless communication according to an embodiment of the present application is shown, the method comprising: determining that a beam failure event of a downlink on an unlicensed frequency band has occurred (S11); and in a beam failure recovery process for the beam failure event, performing uplink transmission based on channel idle detection with reduced latency on the unlicensed frequency band (S12). The method can be performed, for example, on a UE side.

[0092] In one example, in step S12, uplink transmission without channel idle detection can be performed by sharing the COT of the downlink transmission of the base station before the uplink transmission. For example, the uplink transmission includes sending a BFRQ to the base station, and the downlink transmission of the base station includes sending a BFRR to the UE. In addition, although not shown in the figure, the above method may also include obtaining an indication of the length of the COT of the downlink transmission that can be shared from the base station via RRC signaling.

[0093] In another example, in step S12, uplink transmission based on channel idle detection with reduced latency can be performed by dynamically reducing the duration of the channel idle detection. For example, the channel idle detection is LBT, and the size of the contention window of the LBT is dynamically determined in step S12. The size of the contention window of the LBT can be determined based on one or more of the following: the number of occurrences of beam failure events; the historical status of the channel idle detection.

[0094] For example, when it is determined based on the historical status of channel idle detection that the historical idle degree of the channel meets the predetermined condition, the size of the contention window of the LBT is determined based on the number of occurrences of the beam failure event. Exemplarily, the number of occurrences of the beam failure event can be used as a sequence number, and a corresponding value can be determined from an array of candidates for the size of the contention window of the LBT as the size of the contention window of the LBT. The initial value of the size of the contention window of the LBT can also be attenuated according to a predetermined rule based on the number of occurrences of the beam failure event to determine the size of the contention window of the LBT. The attenuation includes, for example, exponential attenuation or multiple attenuation.

[0095] In addition, in step S12, the historical idleness of the channel can also be determined based on the ratio of the CCAs indicated by the results of the L idle channel assessments CCAs performed in the past, and when the ratio exceeds a predetermined threshold, it is determined that the historical idleness of the channel meets a predetermined condition. For example, the results of the L CCAs include one or more of the following: the results of the CCAs periodically performed by the user equipment; the results of the CCAs performed during the previous uplink transmission. It is also possible to use only the results of the CCAs within a predetermined reference time range from the current time.

[0096] The above method may also include obtaining an indication for determining the size of the contention window of the LBT from the base station via RRC signaling. The indication may include, for example, one or more of the following: an array of candidates for the size of the contention window of the LBT; a method for reducing the size of the contention window of the LBT and related parameters; parameters for determining whether to reduce the size of the contention window of the LBT; and whether to dynamically reduce the size of the contention window of the LBT.

[0097] The method corresponds to the electronic device 100 described in the first embodiment and the second embodiment. The specific details thereof can be found in the description of the corresponding positions above, which will not be repeated here.

[0098] Fig.15 A flowchart of a method for wireless communication according to another embodiment of the present application is shown, the method comprising: determining a setting (S21) for a channel idle detection with reduced delay for uplink transmission to be performed by a user equipment on an unlicensed frequency band in a beam failure recovery process for a beam failure event for a downlink on the unlicensed frequency band; and providing the setting to the user equipment (S22).

[0099] For example, the above setting includes an indication of the length of the COT of the downlink transmission of the base station before the uplink transmission that the UE can share.

[0100] In one example, the above setting enables the UE to dynamically reduce the duration of the channel idle detection to perform uplink transmission based on the channel idle detection with reduced latency. The channel idle detection includes, for example, LBT, and the above setting is used to determine the size of the contention window of the LBT. The above setting may include one or more of the following: an array of candidates for the size of the contention window of the LBT; a method for reducing the size of the contention window of the LBT and related parameters; parameters for determining whether to reduce the size of the contention window of the LBT; whether to dynamically reduce the size of the contention window of the LBT.

[0101] In step S22, the setting may be included in RRC signaling and provided to the UE.

[0102] This method corresponds to the electronic device 200 described in the third embodiment. For specific details, please refer to the description of the corresponding position above, which will not be repeated here.

[0103] Note that the above methods can be used in combination or individually.

[0104] The technology of the present disclosure can be applied to various products.

[0105] For example, the electronic device 200 may be implemented as various base stations. The base station may be implemented as any type of evolved Node B (eNB) or gNB (5G base station). eNBs include, for example, macro eNBs and small eNBs. Small eNBs may be eNBs that cover cells smaller than macro cells, such as pico eNBs, micro eNBs, and home (femto) eNBs. Similar situations may also apply to gNBs. Alternatively, the base station may be implemented as any other type of base station, such as a NodeB and a base transceiver station (BTS). The base station may include: a main body (also referred to as a base station device) configured to control wireless communications; and one or more remote radio heads (RRHs) arranged in a different place from the main body. In addition, various types of user equipment may work as a base station by temporarily or semi-permanently performing base station functions.

[0106] The electronic device 100 may be implemented as various user devices. The user device may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / dongle-type mobile router, and a digital camera) or a vehicle-mounted terminal (such as a car navigation device). The user device may also be implemented as a terminal for performing machine-to-machine (M2M) communication (also referred to as a machine type communication (MTC) terminal). In addition, the user device may be a wireless communication module (such as an integrated circuit module including a single chip) installed on each of the above-mentioned terminals.

[0107] [Application examples for base stations]

[0108] (First application example)

[0109] Fig.16 800 is a block diagram showing a first example of a schematic configuration of an eNB or gNB to which the technology of the present disclosure can be applied. Note that the following description takes eNB as an example, but can also be applied to gNB. The eNB 800 includes one or more antennas 810 and a base station device 820. The base station device 820 and each antenna 810 can be connected to each other via an RF cable.

[0110] Each of the antennas 810 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used for the base station device 820 to transmit and receive wireless signals. Fig.16 As shown, the eNB 800 may include multiple antennas 810. For example, the multiple antennas 810 may be compatible with multiple frequency bands used by the eNB 800. Fig.16 An example is shown in which the eNB 800 includes a plurality of antennas 810 , but the eNB 800 may also include a single antenna 810 .

[0111] The base station device 820 includes a controller 821 , a memory 822 , a network interface 823 , and a wireless communication interface 825 .

[0112] The controller 821 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 820. For example, the controller 821 generates a data packet based on the data in the signal processed by the wireless communication interface 825, and transmits the generated packet via the network interface 823. The controller 821 may bundle data from a plurality of baseband processors to generate a bundled packet, and transmit the generated bundled packet. The controller 821 may have a logical function to perform the following control: the control may be such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. The control may be performed in conjunction with a nearby eNB or core network node. The memory 822 includes a RAM and a ROM, and stores programs executed by the controller 821 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

[0113] The network interface 823 is a communication interface for connecting the base station device 820 to the core network 824. The controller 821 can communicate with the core network node or another eNB via the network interface 823. In this case, the eNB 800 and the core network node or other eNBs can be connected to each other through a logical interface (such as an S1 interface and an X2 interface). The network interface 823 can also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 823 is a wireless communication interface, the network interface 823 can use a higher frequency band for wireless communication compared to the frequency band used by the wireless communication interface 825.

[0114] The wireless communication interface 825 supports any cellular communication scheme (such as long term evolution (LTE) and LTE-Advanced), and provides a wireless connection to a terminal located in a cell of the eNB 800 via an antenna 810. The wireless communication interface 825 may generally include, for example, a baseband (BB) processor 826 and an RF circuit 827. The BB processor 826 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing of layers (e.g., L1, medium access control (MAC), radio link control (RLC), and packet data convergence protocol (PDCP)). Instead of the controller 821, the BB processor 826 may have a part or all of the above-mentioned logical functions. The BB processor 826 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuits. Updating the program may change the function of the BB processor 826. The module may be a card or a blade inserted into a slot of the base station device 820. Alternatively, the module may also be a chip mounted on a card or a blade. Meanwhile, the RF circuit 827 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 810 .

[0115] like Fig.16 As shown, the wireless communication interface 825 may include multiple BB processors 826. For example, the multiple BB processors 826 may be compatible with multiple frequency bands used by the eNB 800. Fig.16 As shown, the wireless communication interface 825 may include multiple RF circuits 827. For example, the multiple RF circuits 827 may be compatible with multiple antenna elements. Fig.16 An example is shown in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827 , but the wireless communication interface 825 may also include a single BB processor 826 or a single RF circuit 827 .

[0116] exist Fig.16In the illustrated eNB 800, the transceiver or providing unit 202 of the electronic device 200 may be implemented by the wireless communication interface 825. At least a portion of the functions may also be implemented by the controller 821. For example, the controller 821 may reduce the delay of the BFR by reducing the delay of the LBT of the uplink transmission in the BFR of the downlink of the unlicensed frequency band by executing the functions of the determining unit 201 and the providing unit 202.

[0117] (Second application example)

[0118] Fig.17 830 is a block diagram showing a second example of a schematic configuration of an eNB or gNB to which the technology of the present disclosure can be applied. Note that similarly, the following description takes the eNB as an example, but can also be applied to the gNB. The eNB 830 includes one or more antennas 840, a base station device 850, and an RRH 860. The RRH 860 and each antenna 840 can be connected to each other via an RF cable. The base station device 850 and the RRH 860 can be connected to each other via a high-speed line such as an optical fiber cable.

[0119] Each of the antennas 840 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 860 to transmit and receive wireless signals. Fig.17 As shown, the eNB 830 may include multiple antennas 840. For example, the multiple antennas 840 may be compatible with multiple frequency bands used by the eNB 830. Fig.17 An example is shown in which the eNB 830 includes a plurality of antennas 840 , but the eNB 830 may also include a single antenna 840 .

[0120] The base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857. The controller 851, the memory 852, and the network interface 853 are similar to the reference Fig.16 The controller 821, memory 822 and network interface 823 described are the same.

[0121] The wireless communication interface 855 supports any cellular communication scheme (such as LTE and LTE-Advanced), and provides wireless communication to a terminal located in a sector corresponding to the RRH 860 via the RRH 860 and the antenna 840. The wireless communication interface 855 may generally include, for example, a BB processor 856. In addition to the BB processor 856 being connected to the RF circuit 864 of the RRH 860 via the connection interface 857, the BB processor 856 is connected to the reference RF circuit 864 of the RRH 860. Fig.16 The same as the BB processor 826 described above. Fig.17As shown, the wireless communication interface 855 may include multiple BB processors 856. For example, the multiple BB processors 856 may be compatible with multiple frequency bands used by the eNB 830. Fig.17 An example is shown in which the wireless communication interface 855 includes a plurality of BB processors 856 , but the wireless communication interface 855 may also include a single BB processor 856 .

[0122] The connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH 860. The connection interface 857 may also be a communication module for connecting the base station device 850 (wireless communication interface 855) to the RRH 860 for communication in the above-mentioned high-speed line.

[0123] The RRH 860 includes a connection interface 861 and a wireless communication interface 863 .

[0124] The connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station device 850. The connection interface 861 may also be a communication module for communication in the above-mentioned high-speed line.

[0125] The wireless communication interface 863 transmits and receives wireless signals via the antenna 840. The wireless communication interface 863 may generally include, for example, an RF circuit 864. The RF circuit 864 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 840. Fig.17 As shown, the wireless communication interface 863 may include multiple RF circuits 864. For example, the multiple RF circuits 864 may support multiple antenna elements. Fig.17 An example is shown in which the wireless communication interface 863 includes a plurality of RF circuits 864 , but the wireless communication interface 863 may also include a single RF circuit 864 .

[0126] exist Fig.17 In the illustrated eNB 830, the transceiver or providing unit 202 of the electronic device 200 may be implemented by the wireless communication interface 855 and / or the wireless communication interface 863. At least a portion of the functions may also be implemented by the controller 851. For example, the controller 851 may reduce the delay of the BFR by reducing the delay of the LBT of the uplink transmission in the BFR of the downlink of the unlicensed frequency band by executing the functions of the determining unit 201 and the providing unit 202.

[0127] [Application examples on user devices]

[0128] (First application example)

[0129] Fig.18900 is a block diagram showing an example of a schematic configuration of a smartphone 900 to which the technology of the present disclosure can be applied. The smartphone 900 includes a processor 901, a memory 902, a storage device 903, an external connection interface 904, a camera device 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915, one or more antennas 916, a bus 917, a battery 918, and an auxiliary controller 919.

[0130] The processor 901 may be, for example, a CPU or a system on chip (SoC), and controls the functions of the application layer and other layers of the smartphone 900. The memory 902 includes a RAM and a ROM, and stores data and programs executed by the processor 901. The storage device 903 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 904 is an interface for connecting an external device such as a memory card and a universal serial bus (USB) device to the smartphone 900.

[0131] The camera 906 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image. The sensor 907 may include a group of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 908 converts the sound input to the smart phone 900 into an audio signal. The input device 909 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 910, and receives an operation or information input from a user. The display device 910 includes a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smart phone 900. The speaker 911 converts an audio signal output from the smart phone 900 into sound.

[0132] The wireless communication interface 912 supports any cellular communication scheme (such as LTE and LTE-Advanced), and performs wireless communication. The wireless communication interface 912 may generally include, for example, a BB processor 913 and an RF circuit 914. The BB processor 913 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 914 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 916. Note that although the figure shows a situation where one RF link is connected to one antenna, this is only schematic, and also includes a situation where one RF link is connected to multiple antennas through multiple phase shifters. The wireless communication interface 912 may be a chip module on which the BB processor 913 and the RF circuit 914 are integrated. As shown in FIG. Fig.18As shown, the wireless communication interface 912 may include multiple BB processors 913 and multiple RF circuits 914. Fig.18 An example is shown in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914 , but the wireless communication interface 912 may also include a single BB processor 913 or a single RF circuit 914 .

[0133] In addition, in addition to the cellular communication scheme, the wireless communication interface 912 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes. In this case, the wireless communication interface 912 can include a BB processor 913 and an RF circuit 914 for each wireless communication scheme.

[0134] Each of the antenna switches 915 switches a connection destination of the antenna 916 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 912 .

[0135] Each of the antennas 916 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 912 to transmit and receive wireless signals. Fig.18 As shown, the smart phone 900 may include multiple antennas 916. Fig.18 An example is shown in which the smartphone 900 includes a plurality of antennas 916 , but the smartphone 900 may also include a single antenna 916 .

[0136] In addition, the smartphone 900 may include an antenna 916 for each wireless communication scheme. In this case, the antenna switch 915 may be omitted from the configuration of the smartphone 900.

[0137] The bus 917 connects the processor 901, the memory 902, the storage device 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other. Fig.18 The various blocks of the smartphone 900 shown are supplied with power, the feed lines being partially shown as dashed lines in the figure. The auxiliary controller 919 operates the minimum necessary functions of the smartphone 900, for example in a sleep mode.

[0138] exist Fig.18In the illustrated smart phone 900, the transceiver or acquisition unit 103 of the electronic device 100 may be implemented by the wireless communication interface 912. At least a portion of the functions may also be implemented by the processor 901 or the auxiliary controller 919. For example, the processor 901 or the auxiliary controller 919 may reduce the delay of the BFR by reducing the delay of the LBT of the uplink transmission in the BFR of the downlink of the unlicensed frequency band by executing the functions of the determination unit 101, the execution unit 102, and the acquisition unit 103.

[0139] (Second application example)

[0140] Fig.19 9 is a block diagram showing an example of a schematic configuration of a car navigation device 920 to which the technology of the present disclosure can be applied. The car navigation device 920 includes a processor 921, a memory 922, a global positioning system (GPS) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, a wireless communication interface 933, one or more antenna switches 936, one or more antennas 937, and a battery 938.

[0141] The processor 921 may be, for example, a CPU or an SoC, and controls a navigation function and another function of the car navigation device 920. The memory 922 includes a RAM and a ROM, and stores data and a program executed by the processor 921.

[0142] The GPS module 924 measures the position (such as latitude, longitude and altitude) of the car navigation device 920 using GPS signals received from GPS satellites. The sensor 925 may include a group of sensors such as a gyro sensor, a geomagnetic sensor and an air pressure sensor. The data interface 926 is connected to, for example, the vehicle network 941 via an unshown terminal and acquires data (such as vehicle speed data) generated by the vehicle.

[0143] The content player 927 reproduces content stored in a storage medium such as a CD and a DVD, which is inserted into the storage medium interface 928. The input device 929 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 930, and receives an operation or information input from a user. The display device 930 includes a screen such as an LCD or an OLED display, and displays an image of a navigation function or reproduced content. The speaker 931 outputs a sound of a navigation function or reproduced content.

[0144] The wireless communication interface 933 supports any cellular communication scheme (such as LTE and LTE-Advanced), and performs wireless communication. The wireless communication interface 933 may generally include, for example, a BB processor 934 and an RF circuit 935. The BB processor 934 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 935 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 937. The wireless communication interface 933 may also be a chip module on which the BB processor 934 and the RF circuit 935 are integrated. Fig.19 As shown, the wireless communication interface 933 may include multiple BB processors 934 and multiple RF circuits 935. Fig.19 An example is shown in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935 , but the wireless communication interface 933 may also include a single BB processor 934 or a single RF circuit 935 .

[0145] In addition, in addition to the cellular communication scheme, the wireless communication interface 933 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless LAN schemes. In this case, for each wireless communication scheme, the wireless communication interface 933 can include a BB processor 934 and an RF circuit 935.

[0146] Each of the antenna switches 936 switches a connection destination of the antenna 937 between a plurality of circuits included in the wireless communication interface 933 , such as circuits for different wireless communication schemes.

[0147] Each of the antennas 937 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna), and is used for the wireless communication interface 933 to transmit and receive wireless signals. Fig.19 As shown, the car navigation device 920 may include multiple antennas 937. Fig.19 An example is shown in which the car navigation device 920 includes a plurality of antennas 937 , but the car navigation device 920 may also include a single antenna 937 .

[0148] Furthermore, the car navigation device 920 may include an antenna 937 for each wireless communication scheme. In this case, the antenna switch 936 may be omitted from the configuration of the car navigation device 920.

[0149] Battery 938 is fed via a feed line to Fig.19 The respective blocks of the illustrated car navigation device 920 are supplied with electric power, and feed lines are partially illustrated as dotted lines in the figure. The battery 938 accumulates electric power supplied from the vehicle.

[0150] exist Fig.19 In the illustrated car navigation device 920, the transceiver or acquisition unit 103 of the electronic device 100 may be implemented by a wireless communication interface 933. At least a portion of the functions may also be implemented by the processor 921. For example, the processor 921 may reduce the delay of the BFR by reducing the delay of the LBT of the uplink transmission in the BFR of the downlink of the unlicensed frequency band by executing the functions of the determination unit 101, the execution unit 102, and the acquisition unit 103.

[0151] The technology of the present disclosure may also be implemented as an in-vehicle system (or vehicle) 940 including a car navigation device 920, an in-vehicle network 941, and one or more blocks in a vehicle module 942. The vehicle module 942 generates vehicle data (such as vehicle speed, engine speed, and fault information), and outputs the generated data to the in-vehicle network 941.

[0152] The basic principles of the present invention are described above in conjunction with specific embodiments. However, it should be pointed out that for those skilled in the art, it is understandable that all or any steps or components of the method and device of the present invention can be implemented in any computing device (including a processor, storage medium, etc.) or a network of computing devices in the form of hardware, firmware, software, or a combination thereof. This can be achieved by those skilled in the art using their basic circuit design knowledge or basic programming skills after reading the description of the present invention.

[0153] Furthermore, the present invention also provides a program product storing machine-readable instruction codes. When the instruction codes are read and executed by a machine, the method according to the embodiment of the present invention can be executed.

[0154] Accordingly, the storage medium for carrying the program product storing the machine-readable instruction code is also included in the disclosure of the present invention, including but not limited to a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.

[0155] When the present invention is implemented by software or firmware, the data is transferred from a storage medium or a network to a computer (eg, Fig. 20 The general-purpose computer 2000 shown in the figure is installed with the programs constituting the software, and when the various programs are installed, the computer can execute various functions, etc.

[0156] exist Fig. 20In the embodiment of the present invention, a central processing unit (CPU) 2001 performs various processes according to a program stored in a read-only memory (ROM) 2002 or a program loaded from a storage section 2008 to a random access memory (RAM) 2003. In the RAM 2003, data required when the CPU 2001 performs various processes and the like is also stored as needed. The CPU 2001, the ROM 2002, and the RAM 2003 are connected to each other via a bus 2004. An input / output interface 2005 is also connected to the bus 2004.

[0157] The following components are connected to the input / output interface 2005: an input section 2006 (including a keyboard, a mouse, etc.), an output section 2007 (including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.), a storage section 2008 (including a hard disk, etc.), a communication section 2009 (including a network interface card such as a LAN card, a modem, etc.). The communication section 2009 performs communication processing via a network such as the Internet. A drive 2010 may also be connected to the input / output interface 2005 as needed. A removable medium 2011 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is installed on the drive 2010 as needed, so that a computer program read therefrom is installed in the storage section 2008 as needed.

[0158] In the case where the above-described series of processing is realized by software, a program constituting the software is installed from a network such as the Internet or a storage medium such as the removable medium 2011 .

[0159] It should be understood by those skilled in the art that such storage media is not limited to Fig. 20 The removable medium 2011 shown has a program stored therein and is distributed separately from the device to provide the program to the user. Examples of the removable medium 2011 include magnetic disks (including floppy disks (registered trademark)), optical disks (including compact disk read-only memory (CD-ROM) and digital versatile disks (DVD)), magneto-optical disks (including minidiscs (MD) (registered trademark)), and semiconductor memories. Alternatively, the storage medium may be a ROM 2002, a hard disk included in the storage section 2008, or the like, in which the program is stored and distributed to the user together with the device containing them.

[0160] It should also be noted that in the apparatus, method and system of the present invention, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. In addition, the steps of performing the above series of processes can naturally be performed in chronological order according to the order of description, but do not necessarily need to be performed in chronological order. Some steps can be performed in parallel or independently of each other.

[0161] Finally, it should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, without further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements. Although the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, it should be understood that the embodiments described above are only used to illustrate the present invention and do not constitute a limitation of the present invention. For those skilled in the art, various modifications and changes can be made to the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention is limited only by the attached claims and their equivalents.

Claims

1. An electronic device for wireless communication, comprising: The processing circuit is configured to: Determining that a beam failure event of a downlink in an unlicensed frequency band has occurred; as well as In beam failure recovery processing for the beam failure event, uplink transmission based on channel idle detection with reduced latency is performed on the unlicensed frequency band, wherein the processing circuit is configured to perform the uplink transmission based on the channel idle detection with reduced latency by dynamically reducing the duration of the channel idle detection; The channel idle detection is a listen-before-talk LBT, and the processing circuit is configured to determine the size of the contention window of the LBT based on one or more of the following: the number of occurrences of the beam failure event; the historical status of the channel idle detection; and The processing circuit is further configured to determine the size of the contention window of the LBT based on the number of occurrences of the beam failure event when it is determined based on the historical status of the channel idle detection that the historical idle degree of the channel meets a predetermined condition.

2. The electronic device according to claim 1, wherein: The processing circuit is configured to perform uplink transmission without channel idle detection by sharing the channel occupation time of the downlink transmission of the base station before the uplink transmission; as well as The delay of beam failure recovery of the downlink on the unlicensed frequency band is reduced by combining sharing the channel occupancy time of the downlink transmission of the base station and dynamically reducing the size of the contention window of the LBT.

3. The electronic device according to claim 2, wherein: The uplink transmission includes sending a beam failure recovery request to the base station, and the downlink transmission of the base station includes sending a beam failure indication response to the user equipment.

4. The electronic device according to claim 1, wherein: The processing circuit is configured to use the number of occurrences of the beam failure event as a sequence number, and determine a corresponding value from an array of candidates for the size of the contention window of the LBT as the size of the contention window of the LBT.

5. The electronic device according to claim 1, wherein: The processing circuit is configured to attenuate an initial value of the size of the contention window of the LBT according to a predetermined rule based on the number of occurrences of the beam failure event to determine the size of the contention window of the LBT.

6. The electronic device according to claim 5, wherein: The attenuation includes exponential attenuation or multiple attenuation.

7. The electronic device according to claim 1, wherein: The processing circuit is configured to determine the historical idleness of the channel based on the ratio of the CCAs indicated by the results of L idle channel assessments CCAs performed in the past, and determine that the historical idleness of the channel meets the predetermined condition when the ratio exceeds a predetermined threshold.

8. The electronic device according to claim 7, wherein: The results of the L CCAs include one or more of the following: results of CCAs periodically performed by the user equipment; results of CCAs performed during previous uplink transmissions.

9. The electronic device according to claim 7, wherein: The processing circuit is further configured to use the results of the CCAs that are within a predetermined reference time range from the current time.

10. The electronic device according to claim 1, wherein: The processing circuit is configured to obtain an indication of a size of a contention window for determining the LBT from a base station via radio resource control signaling.

11. The electronic device according to claim 10, wherein: The indication includes one or more of the following: an array of candidates for the size of the contention window of the LBT; a method for reducing the size of the contention window of the LBT and related parameters; parameters for determining whether to reduce the size of the contention window of the LBT; and whether to dynamically reduce the size of the contention window of the LBT.

12. The electronic device according to claim 1, wherein: The processing circuit is configured to obtain an indication of a length of a channel occupation time of a downlink transmission that can be shared from a base station via radio resource control signaling.

13. An electronic device for wireless communication, comprising: The processing circuit is configured to: Determining a setting of a channel idle detection with reduced latency for uplink transmission to be performed by a user equipment on an unlicensed frequency band in a beam failure recovery process for a beam failure event for a downlink on the unlicensed frequency band; as well as providing the settings to the user device, The setting enables the user equipment to dynamically reduce the duration of the channel idle detection to perform the uplink transmission based on the channel idle detection with reduced delay; The channel idle detection includes LBT, and the setting is used to determine the size of the contention window of the LBT based on one or more of the following: the number of occurrences of the beam failure event; the historical status of the channel idle detection; and The setting is used to determine the size of the contention window of the LBT based on the number of occurrences of the beam failure event when it is determined based on the historical status of the channel idle detection that the historical idle degree of the channel meets a predetermined condition.

14. The electronic device according to claim 13, wherein: The processing circuit is configured to provide the setting to the user equipment by including it in radio resource control signaling.

15. The electronic device according to claim 13, wherein: The setting includes an indication of a length of a channel occupation time of a downlink transmission of a base station before the uplink transmission that can be shared by the user equipment.

16. The electronic device according to claim 13, wherein: The setting includes one or more of the following: an array of candidates for the size of the contention window of the LBT; a method for reducing the size of the contention window of the LBT and related parameters; parameters for determining whether to reduce the size of the contention window of the LBT; and whether to dynamically reduce the size of the contention window of the LBT.

17. A method for wireless communication, comprising: Determining that a beam failure event of a downlink in an unlicensed frequency band has occurred; as well as In beam failure recovery processing for the beam failure event, uplink transmission based on channel idle detection with reduced latency is performed on the unlicensed frequency band, wherein the uplink transmission based on the channel idle detection with reduced delay is performed by dynamically reducing the duration of the channel idle detection; The channel idle detection is a listen-before-talk LBT, and the size of the contention window of the LBT is determined based on one or more of the following: the number of occurrences of the beam failure event; the historical status of the channel idle detection; and Wherein, when it is determined based on the historical status of the channel idle detection that the historical idle degree of the channel meets a predetermined condition, the size of the contention window of the LBT is determined based on the number of occurrences of the beam failure event.

18. A method for wireless communication, comprising: Determining a setting of a channel idle detection with reduced latency for uplink transmission to be performed by a user equipment on an unlicensed frequency band in a beam failure recovery process for a beam failure event for a downlink on the unlicensed frequency band; as well as providing the settings to the user device, The setting enables the user equipment to dynamically reduce the duration of the channel idle detection to perform the uplink transmission based on the channel idle detection with reduced delay; The channel idle detection includes LBT, and the setting is used to determine the size of the contention window of the LBT based on one or more of the following: the number of occurrences of the beam failure event; the historical status of the channel idle detection; and The setting is used to determine the size of the contention window of the LBT based on the number of occurrences of the beam failure event when it is determined based on the historical status of the channel idle detection that the historical idle degree of the channel meets a predetermined condition.

19. A computer-readable storage medium having computer-executable instructions stored thereon, which, when executed by a processor, causes the processor to execute the method for wireless communication according to claim 17 or 18.

20. A computer program product comprising a computer program / instructions, wherein: When the computer program / instructions are executed by a processor, the steps of the method for wireless communication according to claim 17 or 18 are implemented.

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