Method, apparatus, and communication device for determining SSB position

Abstract

The present disclosure provides a method, apparatus, and communication device for determining the position of an SSB, belonging to the field of wireless communication technologies. Among them, the method includes: determining the actual transmission position of a target SSB according to the set positions of each SSB in a radio frame, where there is at least one OFDM symbol interval between the set positions of each SSB in the radio frame, and at least one time slot in the radio frame contains two SSB positions. The set positions of each SSB in the radio frame are configured for a working frequency band greater than 52.6 GHz, and can be applied to the transmission of SSBs in a scenario with a relatively high subcarrier spacing.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a communication device for determining the position of a Synchronization Signal Block (SSB). Background Art

[0002] In a New Radio (NR) communication system, the NR standard specifies the Orthogonal Frequency Division Multiplexing (OFDM) symbol index values of the candidate positions of Synchronization Signal and PBCH Blocks (SSBs) relative to the starting point of a semi-wireless frame in several scenarios. In some cases, based on the detected SSB time index and the position of each SSB in the semi-wireless frame specified by the NR standard, a terminal device can determine the position of the SSB in the semi-wireless frame. However, in the related art, only the OFDM symbol index values of the set SSB positions relative to the starting point of the SSB semi-wireless frame in the case of a lower Sub-Carrier Space (SCS) scenario are specified, and it cannot be applied to a higher sub-carrier interval scenario. Summary of the Invention

[0003] The method for determining the SSB position according to the first aspect embodiment of the present disclosure is applicable to a network device and includes:

[0004] Determine the actual transmission position of a target SSB according to the set SSB positions in a wireless frame;

[0005] Send indication information of the actual transmission position to a terminal device;

[0006] Wherein, there is at least one OFDM symbol interval between the set SSB positions in the wireless frame, and at least one time slot in the wireless frame contains two SSB positions.

[0007] Optionally, in an authorized frequency band, the total number of the set SSB positions in the wireless frame is m times L, where m is a natural number not equal to zero, and L is the maximum number of SSBs included in an SSB burst set.

[0008] Optionally, in an unlicensed frequency band, alternative SSB positions are set in the wireless frame, and the alternative SSB positions are used for SSB transmission in the unlicensed frequency band.

[0009] Optionally, at least one of the SSB positions in the wireless frame corresponds to the same beam as an adjacent OFDM symbol, and the adjacent OFDM is used for uplink transmission.

[0010] Optionally, the target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

[0011] Optionally, the actual transmission position is a partial SSB position among the set SSB positions.

[0012] Optionally, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0013] Optionally, in response to the subcarrier spacing being 480 KHz, the OFDM symbol index value range of the first OFDM symbol of each SSB position in the radio frame is {16, 21, 26, 31, 36, 41, 46, 51} + 112n, where n takes a value of 0 or 1.

[0014] Optionally, in response to the subcarrier spacing being 960 KHz, the OFDM symbol index value range of the first OFDM symbol of each SSB position in the radio frame is {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91} + 112n, where n takes a value of 0 or 1.

[0015] A method for determining an SSB position according to an embodiment of the second aspect of the present disclosure is applicable to a terminal device, and includes:

[0016] a determination module, configured to determine the actual transmission position of the target SSB to be actually transmitted in the radio frame according to the position indication information sent by the network device and each SSB position set in the radio frame;

[0017] Wherein, there is at least one OFDM symbol interval between each SSB position set in the radio frame, and at least one time slot in the radio frame contains two SSB positions.

[0018] Optionally, in the authorized frequency band, the total number of the SSB positions set in the radio frame is m times L, where m is a natural number not equal to zero, and L is the maximum number of SSBs included in the SSB burst set.

[0019] Optionally, in the unlicensed frequency band, alternative SSB positions are set in the radio frame, and the alternative SSB positions are used for SSB transmission in the unlicensed frequency band.

[0020] Optionally, at least one of the SSB positions in the radio frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM is used for uplink transmission.

[0021] Optionally, the target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

[0022] Optionally, the position where the target SSB is actually transmitted is a partial SSB position among the set SSB positions.

[0023] Optionally, the position indication information includes at least one of a high-layer parameter and an SSB time index.

[0024] Optionally, in response to the subcarrier spacing being 480 KHz, the OFDM symbol index value of the first OFDM symbol of each of the SSB positions in the radio frame ranges from {16, 21, 26, 31, 36, 41, 46, 51} + 112n, where n is 0 or 1.

[0025] Optionally, in response to the subcarrier spacing being 960 KHz, the OFDM symbol index value of the first OFDM symbol of each of the SSB positions in the radio frame ranges from {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91} + 112n, where n is 0 or 1.

[0026] A device for determining an SSB position according to an embodiment of the third aspect of the present disclosure, which is applicable to a network device, includes:

[0027] A determination module, configured to determine the actual transmission position of the target SSB according to the set SSB positions in the radio frame;

[0028] A sending module, configured to send indication information of the actual transmission position to a terminal device;

[0029] Wherein, there is at least one OFDM symbol interval between the set SSB positions in the radio frame, and at least one time slot in the radio frame contains two SSB positions.

[0030] A device for determining an SSB position according to an embodiment of the fourth aspect of the present disclosure, which is applicable to a terminal device, includes:

[0031] A determination module, configured to determine the actual transmission position of the target SSB actually transmitted in the radio frame according to the position indication information sent by the network device and the set SSB positions in the radio frame;

[0032] Wherein, there is at least one OFDM symbol interval between the set SSB positions in the radio frame, and at least one time slot in the radio frame contains two SSB positions.

[0033] The communication device provided by the fifth aspect embodiment of the present disclosure includes: a transceiver; a memory; and a processor, which are respectively connected to the transceiver and the memory, and are configured to control the wireless signal transceiver of the transceiver by executing computer-executable instructions on the memory, and can implement the method provided by the first aspect or the second aspect.

[0034] The computer storage medium provided by the sixth aspect embodiment of the present disclosure stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the method provided by the first aspect or the second aspect can be implemented.

[0035] The method, device and communication device for determining the SSB position provided by the embodiments of the present disclosure, the method includes: determining the actual transmission position of the target SSB according to each SSB position set in the wireless frame, where there is at least one OFDM symbol interval between each SSB position set in the wireless frame, and at least one time slot in the wireless frame contains two SSB positions. For each SSB position set in the wireless frame configured for a working frequency band greater than 52.6 GHz, it can be applied to the transmission of SSB in a higher subcarrier spacing scenario in the 52.6 GHz working frequency band.

[0036] Additional aspects and advantages of the present disclosure will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0038] Figure 1 is a schematic flowchart of a method for determining an SSB position provided by an embodiment of the present disclosure;

[0039] Figure 2 is a schematic flowchart of another method for determining an SSB position provided by an embodiment of the present disclosure;

[0040] Figure 3 is a schematic flowchart of another method for determining an SSB position provided by an embodiment of the present disclosure;

[0041] Figure 4 is a schematic flowchart of another method for determining an SSB position provided by an embodiment of the present disclosure;

[0042] Figure 5 is a schematic structural diagram of a device for determining an SSB position provided by an embodiment of the present disclosure;

[0043] Figure 6Structural schematic diagram of another SSB position determination device provided by an embodiment of the present disclosure;

[0044] Figure 7 Block diagram of a terminal device provided by an embodiment of the present disclosure;

[0045] Figure 8 Structural schematic diagram of a network device provided by an embodiment of the present disclosure. Detailed implementation manners

[0046] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the embodiments of the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present disclosure as detailed in the appended claims.

[0047] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present disclosure. The singular forms "a" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0048] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "when" used herein may be interpreted as "when" or "when... " or "in response to determining".

[0049] The embodiments of the present disclosure will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present disclosure, and should not be construed as a limitation of the present disclosure.

[0050] In the NR system, each radio frame is divided into 10 sub-frames of the same size with a length of 1 ms. Among them, a semi-radio frame contains 5 such sub-frames. Depending on the subcarrier spacing, each sub-frame may contain multiple time slots. Each time slot is composed of a certain number of OFDM symbols, and the number of OFDM symbols can be determined by the type of cyclic prefix (CP). The NR system supports the transmission of multi-beam synchronization signals (SS), secondary synchronization signals, and physical broadcast channels (PBCH). An SSB (which can also be called an SS / PBCH block) usually occupies 4 OFDM symbols, and the position of the SSB within the transmission window of the semi-radio frame is related to the subcarrier spacing.

[0051] In the time domain, among the 4 OFDM symbols occupied by an SSB, it includes: a primary synchronized signal (PSS) in 1 OFDM symbol, a secondary synchronized signal (SSS) in 1 OFDM symbol, and a PBCH in 2 OFDM symbols.

[0052] In the frequency range from 52.6 GHz to 71 GHz, a higher subcarrier spacing is adopted compared to below 52.6 GHz. The subcarrier spacing can be configured as 120 KHz, 240 KHz, and 480 KHz, and can reach up to 960 KHz. Among them, when the subcarrier spacing is 120 KHz and when the subcarrier spacing is 240 KHz, the OFDM symbol index values of the set SSB positions relative to the starting point of the semi-radio frame in the SSB semi-radio frame have been specified. However, there is still a lack of relevant regulations for the scenarios with subcarrier spacings of 480 KHz and 960 KHz.

[0053] The following describes in detail the method, device, communication equipment, and storage medium for determining the SSB position provided by the present disclosure with reference to the accompanying drawings.

[0054] Figure 1 It is a schematic flowchart of a method for determining the SSB position provided by an embodiment of the present disclosure. The method provided by this embodiment is executed by a network device.

[0055] A network device, whose operating frequency band can be greater than 52.6 GHz, is used to provide wireless communication functions for terminal devices. The network device can be a Base Station (BS). The network device can perform wireless communication with the terminal device via one or more antennas. The network device can provide communication coverage for its geographical area. The base station can include different types such as macro base stations, micro base stations, relay stations, access points, etc. In some embodiments, the base station may be referred to by those skilled in the art as a base station transceiver, wireless base station, access point, wireless transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Node B, evolved Node B (eNB or eNodeB), or some other appropriate terms. Exemplarily, in a 5G system, the base station is called a gNB. For ease of description, in the embodiments of the present disclosure, the devices that provide wireless communication functions for the terminal device are collectively referred to as network devices.

[0056] As Figure 1 shown, the method includes the following steps:

[0057] Step 101, determine the actual transmission position of the target SSB according to the positions of each SSB set in the wireless frame.

[0058] In the embodiments of the present disclosure, the mentioned wireless frame can be one or more wireless frames, or a semi - wireless frame. Subsequently, the semi - wireless frame will be taken as an example for related explanations. Those skilled in the art can understand that, on this basis, the positions of each SSB can also be set in one or more wireless frames, and all the above - mentioned methods are within the scope of this embodiment.

[0059] The design scheme of setting the positions of each SSB in the semi - wireless frame can be called a pattern or a layout. The positions of each SSB set in the semi - wireless frame can meet the following setting conditions:

[0060] There is at least one OFDM symbol interval between the positions of each SSB in the semi - wireless frame, and at least one time slot in the semi - wireless frame contains two SSB positions.

[0061] The following is an explanatory description of this setting condition:

[0062] In a semi-wireless frame, there needs to be a gap of one or more OFDM symbols between two adjacent SSB positions. The OFDM symbols in the gap can be used for beam-based Listen Before Talk (LBT) in the unlicensed band. That is to say, the terminal device determines the beam directions of one or more beams to be monitored, namely the beam directions to be monitored, so as to determine the beams to be monitored that need to be listened to. The terminal device listens to one or more beams to be monitored using the OFDM symbols in the gap between two adjacent SSB positions to determine the beam suitable for data transmission, and then can complete beam-based LBT.

[0063] At least one time slot in the semi-wireless frame contains two SSB positions, so that at least one OFDM symbol is included in at least one time slot for the terminal device to complete beam-based LBT.

[0064] In the downlink synchronization process of NR, if the target SSB actually transmitted is the cell-defined SSB, after the terminal device blindly detects the target SSB, it also needs to find the corresponding control resource set zero (control-resourceset0, CORESET0) according to the target SSB, so as to blindly detect the Physical Downlink Control Channel (PDCCH) within the CORESET0 to obtain the Downlink Control Information (DCI), and then find the Physical Downlink Share Channel (PDSCH) carrying the System Information Block (SIB). NR defines several possible multiplexing modes of SSB and CORESET0. As a possible implementation, the target SSB actually transmitted and its corresponding CORESET0 appear in the same OFDM symbol and are multiplexed in the frequency domain. That is to say, the target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

[0065] As the traffic volume increases, especially in some urban areas, the authorized frequency band may be difficult to meet the traffic volume requirements. Therefore, in related technologies, data transmission between access network devices and terminal devices is carried out through the unlicensed frequency band to meet greater traffic volume requirements. The unlicensed frequency band is a frequency band divided by countries and regions that can be used for radio device communication. This frequency band is generally considered a shared frequency band, that is, communication devices in different communication systems can use this frequency band as long as they meet the regulatory requirements set by the country or region on this frequency band, and do not need to apply to the government for a proprietary frequency band authorization. The unlicensed frequency band can also be referred to by those skilled in the art as a shared frequency band, unlicensed spectrum, license-free frequency band, license-free spectrum, shared frequency band, license-exempt frequency band, license-exempt spectrum, or some other appropriate terms.

[0066] For a design scheme of the SSB position in a semi-wireless frame, it is applicable to the authorized frequency band, or, it is applicable to the unlicensed frequency band, or it can also be applicable to both the authorized frequency band and the unlicensed frequency band at the same time. The design scheme of the SSB position in the semi-wireless frame applicable to the unlicensed frequency band may be the same as or different from the design scheme of the SSB position in the semi-wireless frame applicable to the authorized frequency band.

[0067] In some possible embodiments of the present disclosure, in the unlicensed frequency band, the SSB positions set by the design scheme in the semi-wireless frame may further conform to the setting of alternative SSB positions in the semi-wireless frame, and the alternative SSB positions are used for SSB transmission in the unlicensed frequency band. For example: when the SSB transmission period, that is, the DRS period, is 5 ms, for subcarrier spacings of 480 KHz and 960 KHz, 3 or 6 alternative SSB positions can be set. Since there are more alternative SSB positions, there is no need for QCL value for relevant indication.

[0068] In some other possible embodiments of the present disclosure, in the unlicensed frequency band, the SSB positions set by the design scheme in the semi-wireless frame may further conform to that at least one of the SSB positions in the semi-wireless frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM can be used for uplink transmission. The uplink transmission here can include uplink control or uplink data, and can also include a random access channel. Since the adjacent OFDM symbols can be used for uplink transmission and the SSB position corresponds to the same beam as the adjacent OFDM symbol, in some possible scenarios, the terminal device can achieve uplink transmission without performing LBT.

[0069] In some other possible embodiments of the present disclosure, in the authorized frequency band, the positions of each SSB in the semi-wireless frame set by the design solution may further conform to that the total number of SSB positions set in the semi-wireless frame is m times L, where m is a natural number not equal to 0, and L is the maximum number of SSBs included in the SSB burst set. The total number of SSB positions is an integer multiple of the maximum number of SSBs included in the SSB burst set. Thus, in this design solution, the requirement for repeated transmission of SSBs can be met. For example, when the maximum number of SSBs included in the SSB burst set is 64, the total number of SSB positions set in the semi-wireless frame is 64m, meeting the requirement for m times of repeated transmission. As a possible implementation, in order to simplify relevant configuration information, for example, cancel the expression of the Quasi Co-Located (QCL) value for the actual number of SSBs in the SSB burst set, the maximum number of SSBs included in the SSB burst set can be set to a fixed value.

[0070] Step 102: Send the indication information of the actual transmission position to the terminal device.

[0071] Among them, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0072] As a possible scenario, the network device sends the target SSB of the actual transmission position, and the terminal device that receives the target SSB is the initially accessing terminal device. When the terminal device detects the target SSB, the terminal device needs to obtain the timing information in the target SSB to achieve the purpose of downlink time synchronization. The timing information that the terminal device needs to obtain includes the semi-wireless frame time slot index and the OFDM symbol index in the time slot.

[0073] The actual transmission position of the target SSB in the semi-wireless frame is represented by the time slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the time slot. To calculate the time slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the time slot, it is necessary to know the position of the target SSB in the SSB burst set. The transmission of an SSB burst set is restricted within a semi-wireless frame. An SSB burst set contains multiple SSBs. The arrangement order of each SSB in the SSB burst set and the number of time slots in the semi-wireless frame determine the specific time slot of the SSB in the semi-wireless frame and the OFDM symbol position in the time slot. To enable the terminal device to know the position of the target SSB in the SSB burst set, the network device carries the sequence number of the target SSB in the SSB burst set, that is, the SSB time index, in the target SSB.

[0074] In order to enable the terminal device to determine the position of the target SSB in the semi-wireless frame according to the detected SSB time index, the OFDM symbol index values of the positions of each SSB in each scenario relative to the starting point of the semi-wireless frame in the semi-wireless frame are also fixedly set. According to the detected SSB time index and the fixedly set OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame, the terminal device can determine the actual transmission position of the target SSB in the semi-wireless frame, that is, at least one of the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index of the SSB in this slot.

[0075] In another scenario, the terminal device that receives the target SSB has completed the initial cell search and accessed the network device. The network device can indicate the actual transmission position by sending high-layer parameters. The NR protocol stipulates the maximum number of SSBs in an SSB burst set within each frequency range. In actual system deployment, the network can configure the positions and numbers of the actually transmitted SSBs in the SSB burst set of each cell according to the size of the coverage area and the angular range covered by each SSB beam. That is to say, the number of actually transmitted SSBs in an SSB burst set can be less than or equal to the maximum number stipulated by the protocol. The resources of the non-transmitted SSBs can be used for the transmission of PDSCH, etc. As a possible implementation, the network device notifies the terminal device of the actual transmission position, including the SSB position and number, through high-layer parameters, such as ssb-PositionsInBurst, so that the terminal device can correctly perform rate matching when receiving PDSCH.

[0076] In the embodiments of the present disclosure, the actual transmission position of the target SSB is determined according to the set positions of each SSB in the semi-wireless frame. Among them, there is at least one OFDM symbol interval between the set positions of each SSB in the semi-wireless frame, and at least one slot in the semi-wireless frame contains two SSB positions. The set positions of each SSB in the semi-wireless frame are configured for the working frequency band greater than 52.6 GHz, and can be applied to the transmission of SSBs in scenarios with a higher subcarrier spacing. In addition, it should be noted that the set positions of each SSB in the semi-wireless frame provided in the embodiments of the present disclosure can be used for cell-defined SSBs with a subcarrier spacing less than or equal to 240 KHz, or cell-defined SSBs with a subcarrier spacing greater than 240 KHz, or the transmission of non-cell-defined SSBs.

[0077] Figure 2 It is a schematic flowchart of another method for determining the SSB position provided by the embodiments of the present disclosure. The method provided in this embodiment can be executed by a network device with a working frequency band greater than 52.6 GHz.

[0078] For the relevant definitions of network devices, refer to the relevant descriptions in the embodiments of the present disclosure, and they will not be elaborated herein.

[0079] As Figure 2 shown, the method includes:

[0080] Step 201, determine the OFDM symbol index values of each SSB position relative to the starting point of the radio frame in the radio frame according to the adopted subcarrier spacing.

[0081] In the embodiments of the present disclosure, the mentioned radio frame may be one or more radio frames, or a semi - radio frame. Subsequently, the semi - radio frame will be taken as an example for relevant description. Those skilled in the art can understand that on this basis, the positions of each SSB can also be set in one or more radio frames, and all the above - mentioned methods are within the scope of this embodiment.

[0082] The design scheme for setting the positions of each SSB in the semi - radio frame can be called a mode or pattern. Different design schemes can be adopted under different subcarrier spacings.

[0083] In the frequency band greater than 52.6 GHz, the subcarrier spacing (SCS) can be 120 KHz, 240 KHz, and 480 KHz, and the highest can reach 960 KHz. Among them, when the SCS is 120 KHz and when the SCS is 240 KHz, the NR system has already specified the OFDM symbol index values of the set SSB positions relative to the starting point of the SSB semi - radio frame, which will not be elaborated herein.

[0084] In the embodiments of the present disclosure, the scenarios with subcarrier spacings of 480 KHz and 960 KHz will be described.

[0085] In some embodiments of the present disclosure, the subcarrier spacing is 480 KHz. In response to the subcarrier spacing being 480 KHz, the OFDM symbol index value range of the first OFDM symbol of each of the SSB positions in the semi - radio frame is {16, 21, 26, 31, 36, 41, 46, 51}+112n, where n takes the value of 0 or 1. Each OFDM symbol index value within the value range corresponds to a set SSB position, and two SSB positions are set within each time slot.

[0086] In some embodiments of the present disclosure, the subcarrier spacing is 960 KHz. In response to the subcarrier spacing being 960 KHz, the OFDM symbol index value of the first OFDM symbol at each SSB position in the semi-wireless frame ranges from {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91} + 112n, where n is 0 or 1. Each OFDM symbol index value within the range corresponds to a set SSB position, and two SSB positions are set within each time slot.

[0087] Step 202: Determine the actual transmission position of the target SSB according to the OFDM symbol index value of each SSB position relative to the starting point of the wireless frame in the wireless frame.

[0088] According to the subcarrier spacing, the OFDM symbol index value range of the first OFDM symbol at each SSB position in the semi-wireless frame is determined. Then, within the OFDM symbol index value range, an OFDM symbol index value is selected, and the SSB position corresponding to the selected OFDM symbol index value is used as the actual transmission position of the target SSB.

[0089] Step 203: Send indication information of the actual transmission position to the terminal device.

[0090] Among them, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0091] In a possible scenario, the network device sends the target SSB, and the terminal device that receives the target SSB is an initially accessing terminal device. The terminal device detects the target SSB, and the terminal device needs to obtain the timing information in the target SSB to achieve the purpose of downlink time synchronization. The timing information that the terminal device needs to obtain includes the semi-wireless frame time slot index and the OFDM symbol index in the time slot.

[0092] The actual transmission position of the target SSB in the semi-wireless frame is represented by the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot. In order for the terminal device to deduce the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot, it needs to know the position of the target SSB in the SSB burst set. The transmission of an SSB burst set is restricted within a semi-wireless frame. An SSB burst set contains multiple SSBs. The arrangement order of each SSB in the SSB burst set and the number of slots in the semi-wireless frame determine the specific slot of the SSB in the semi-wireless frame and the OFDM symbol position in that slot. In order for the terminal device to know the position of the target SSB in the SSB burst set, the network device carries the serial number of the target SSB in the SSB burst set, that is, the SSB time index, in the target SSB. For example: the SSB time index is 2, that is, the corresponding target SSB is the 3rd SSB position in the semi-wireless frame.

[0093] In order for the terminal device to determine the position of the target SSB in the semi-wireless frame according to the detected SSB time index, the OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame are fixedly set in various scenarios. According to the detected SSB time index and the fixedly set OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame, the terminal device can determine the actual transmission position of the target SSB in the semi-wireless frame, that is, at least one of the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index of the SSB in that slot.

[0094] For example, when the subcarrier spacing is 480 KHz, the terminal device can determine that the target SSB is the 3rd SSB position in the semi-wireless frame according to the SSB time index of 2. The value range of the OFDM symbol index is {16, 21, 26, 31, 36, 41, 46, 51}+112n, that is, the index value of the OFDM symbol of the target SSB relative to the starting point of the semi-wireless frame is 26.

[0095] In another scenario, the terminal device that has received the target SSB has completed initial cell search and accessed the network device. The network device can indicate the actual transmission position by sending high-layer parameters. The NR protocol stipulates the maximum number of SSBs in an SSB burst set within each frequency range. In actual system deployment, the network can configure the position and number of SSBs actually transmitted in each cell's SSB burst set according to the size of the coverage area and the angular range covered by each SSB beam. That is to say, the number of SSBs actually transmitted within an SSB burst set can be less than or equal to the maximum number stipulated by the protocol. The untransmitted SSB resources can be used for the transmission of PDSCH, etc. As a possible implementation, the network device notifies the terminal device of the actual transmission position, including the SSB position and number, through high-layer parameters such as ssb-PositionsInBurst, so that the terminal device can correctly perform rate matching when receiving PDSCH. For example: The high-layer parameter can be in the form of a bitmap, and each bit represents whether the corresponding SSB position is actually used for the transmission of the target SSB, that is, whether it is the actual transmission position, so that the terminal device can determine the actual transmission position of the target SSB according to the high-layer parameter.

[0096] In the embodiments of the present disclosure, according to the SSB positions set in the semi-wireless frame, the actual transmission position of the target SSB is determined, wherein there is at least one OFDM symbol interval between the SSB positions set in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions. The SSB positions set in the semi-wireless frame are configured for a working frequency band greater than 52.6 GHz and can be applied to the transmission of SSBs in a scenario with a relatively high subcarrier spacing.

[0097] Figure 3 It is a schematic flowchart of another method for determining the SSB position provided by the embodiments of the present disclosure, and the method provided by this embodiment is executed by the terminal device.

[0098] A terminal device, whose operating frequency band can be greater than 52.6 GHz, can be distributed throughout the mobile communication system, and each terminal device can be stationary or mobile. The terminal device can also be referred to by those skilled in the art as a mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, user equipment, radio equipment, wireless communication equipment, remote device, mobile user station, access terminal device, mobile terminal device, wireless terminal device, remote terminal device, handheld device, user agent, mobile client, client, or some other appropriate terms. The terminal device can be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication equipment, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc. The terminal device is capable of communicating with network equipment in the mobile communication system.

[0099] As Figure 3 shown, the method includes the following steps:

[0100] Step 301: Determine the actual transmission position of the target SSB in the wireless frame according to the location indication information sent by the network equipment and the positions of each SSB set in the wireless frame. Among them, there is at least one OFDM symbol interval between the positions of each SSB set in the wireless frame, and at least one time slot in the wireless frame contains two SSB positions.

[0101] In the embodiments of the present disclosure, the mentioned wireless frame can be one or more wireless frames, or a semi - wireless frame. Subsequently, the semi - wireless frame will be taken as an example for related description. Those skilled in the art can understand that, on this basis, the positions of each SSB can also be set in one or more wireless frames, and all the above - mentioned methods are within the scope of this embodiment.

[0102] In the embodiments of the present disclosure, the design scheme for setting the positions of each SSB in the semi - wireless frame can be referred to as a mode or pattern. The positions of each SSB set in the semi - wireless frame can meet the following setting conditions:

[0103] There is at least one OFDM symbol interval between the positions of each SSB in the semi - wireless frame, and at least one time slot in the semi - wireless frame contains two SSB positions.

[0104] The following is an explanation of this setting condition:

[0105] In a semi-wireless frame, there needs to be an interval of one or more OFDM symbols between two adjacent SSB positions. The OFDM symbols in the interval can be used for beam-based LBT in the unlicensed band. That is to say, the terminal device determines the beam directions of one or more beams to be monitored, namely the beam directions to be monitored, so as to determine the beams to be monitored that need to be monitored. The terminal device monitors one or more beams to be monitored using the OFDM symbols in the interval between two adjacent SSB positions to determine the beam suitable for data transmission, and then can complete beam-based LBT.

[0106] At least one time slot in the semi-wireless frame contains two SSB positions, so that at least one OFDM symbol is included in at least one time slot for the terminal device to complete beam-based LBT.

[0107] In the downlink synchronization process of NR, if the target SSB actually transmitted is the cell-defined SSB, after the terminal device blindly detects the target SSB, it also needs to find the corresponding CORESET0 according to the target SSB, and then blindly detect the PDCCH in CORESET0 to obtain DCI information, and then find the PDSCH carrying SIB1. NR defines several possible multiplexing patterns of SSB and CORESET0. As a possible implementation, the target SSB actually transmitted and its corresponding CORESET0 appear in the same OFDM symbol and are multiplexed in the frequency domain. That is to say, the target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

[0108] For a design scheme of SSB positions in a semi-wireless frame, it is applicable to the licensed band, or applicable to the unlicensed band, or can also be applicable to both the licensed band and the unlicensed band. That is to say, the design scheme of SSB positions in the semi-wireless frame applicable to the unlicensed band may be the same as or different from the design scheme of SSB positions in the semi-wireless frame applicable to the licensed band.

[0109] In some possible embodiments of the present disclosure, in the unlicensed band, each SSB position set by the design scheme in the semi-wireless frame can further conform to the setting of alternative SSB positions in the semi-wireless frame, and the alternative SSB positions are used for SSB transmission in the unlicensed band. For example, when the SSB transmission period, that is, the DRS period, is 5 ms, for subcarrier spacings of 480 KHz and 960 KHz, 3 or 6 alternative SSB positions can be set. Since there are more alternative SSB positions, no QCL value is required for relevant indication.

[0110] In some other possible embodiments of the present disclosure, in the unlicensed frequency band, the positions of each SSB set in the design solution in the semi-wireless frame may further conform to that at least one of the SSB positions in the semi-wireless frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM symbols can be used for uplink transmission. The uplink transmission here may include uplink control or uplink data, and may also include a random access channel. Since the adjacent OFDM symbols can be used for uplink transmission and the SSB position corresponds to the same beam as the adjacent OFDM symbol, in some possible scenarios, the terminal device can achieve uplink transmission without performing LBT.

[0111] In some other possible embodiments of the present disclosure, in the licensed frequency band, the positions of each SSB set in the design solution in the semi-wireless frame may further conform to that the total number of SSB positions set in the semi-wireless frame is m times L, where m is a natural number not equal to zero, and L is the maximum number of SSBs included in the SSB burst set. The total number of SSB positions is an integer multiple of the maximum number of SSBs included in the SSB burst set. Thus, in this design solution, the requirement for repeated transmission of SSBs can be met. For example, when the maximum number of SSBs included in the SSB burst set is 64, the total number of SSB positions set in the semi-wireless frame is 64m, meeting the requirement for m times of repeated transmission. As a possible implementation manner, in order to simplify the relevant configuration information, for example, canceling the expression of the QCL value for the actual number of SSBs in the SSB burst set, the maximum number of SSBs included in the SSB burst set can be set to a fixed value.

[0112] In the embodiments of the present disclosure, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0113] As a possible scenario, the network device sends the target SSB of the actual transmission position, and the terminal device that receives the target SSB is the initially accessing terminal device. When the terminal device detects the target SSB, the terminal device needs to obtain the timing information in the target SSB to achieve the purpose of downlink time synchronization. The timing information that the terminal device needs to obtain includes the semi-wireless frame slot index and the OFDM symbol index in the slot.

[0114] The actual transmission position of the target SSB in the semi-wireless frame is represented by the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot. To deduce the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot, it is necessary to know the position of the target SSB in the SSB burst set. The transmission of an SSB burst set is restricted within a semi-wireless frame. An SSB burst set contains multiple SSBs. The arrangement order of each SSB in the SSB burst set, as well as the number of slots in the semi-wireless frame, determines the specific slot of the SSB in the semi-wireless frame and the OFDM symbol position in that slot. To enable the terminal device to know the position of the target SSB in the SSB burst set, the network device carries the sequence number of the target SSB in the SSB burst set in the target SSB, that is, the SSB time index.

[0115] To enable the terminal device to determine the position of the target SSB in the semi-wireless frame according to the detected SSB time index, the OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame in various scenarios are also fixedly set. According to the detected SSB time index and the fixedly set OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame, the terminal device can determine the actual transmission position of the target SSB in the semi-wireless frame, that is, at least one of the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index of the SSB in that slot.

[0116] In another scenario, the terminal device that receives the target SSB has completed the initial cell search and accessed the network device. The network device can indicate the actual transmission position by sending high-layer parameters. The NR protocol stipulates the maximum number of SSBs in an SSB burst set in each frequency range. In actual system deployment, the network can configure the positions and numbers of the actually transmitted SSBs in the SSB burst set of each cell according to the size of the coverage area and the angular range covered by each SSB beam. That is to say, the number of actually transmitted SSBs in an SSB burst set can be less than or equal to the maximum number stipulated by the protocol. The untransmitted SSB resources can be used for the transmission of PDSCH, etc. As a possible implementation method, the network device notifies the terminal device of the actual transmission position, including the SSB position and number, through high-layer parameters, such as ssb-PositionsInBurst, so that the terminal device can correctly perform rate matching when receiving PDSCH.

[0117] In the embodiments of the present disclosure, according to the positions of each SSB set in the semi-wireless frame, the actual transmission position of the target SSB is determined. Among them, there is at least one OFDM symbol interval between the positions of each SSB set in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions. The positions of each SSB set in the semi-wireless frame are configured for a working frequency band greater than 52.6 GHz, and can be applied to the transmission of SSB in a scenario with a relatively high subcarrier spacing. In addition, it should be noted that the positions of each SSB set in the semi-wireless frame provided in the embodiments of the present disclosure can be used for defining SSB in a cell with a subcarrier spacing less than or equal to 240 KHz, or for defining SSB in a cell with a subcarrier spacing greater than 240 KHz, or for the transmission of non-cell-defined SSB.

[0118] Figure 4 FIG. 4 is a schematic flowchart of another method for determining the SSB position provided by the embodiments of the present disclosure. The method provided in this embodiment can be executed by a terminal device with a working frequency band greater than 52.6 GHz.

[0119] For the relevant definitions of the terminal device, refer to the relevant descriptions in the embodiments of the present disclosure, and details are not described herein again in this embodiment.

[0120] As Figure 4 shown, the method includes:

[0121] Step 401, according to the subcarrier spacing of the target SSB, determine the OFDM symbol index value of each SSB position relative to the starting point of the wireless frame in the wireless frame.

[0122] In the embodiments of the present disclosure, the wireless frame mentioned may be one or more wireless frames, or a semi-wireless frame. Subsequently, the semi-wireless frame will be taken as an example for relevant description. Those skilled in the art can understand that on this basis, the positions of each SSB can also be set in one or more wireless frames, and all the above methods are within the scope of this embodiment.

[0123] The design scheme of setting each SSB position in the semi-wireless frame can be called a mode or pattern. Different design schemes can be adopted under different subcarrier spacings.

[0124] In the frequency band greater than 52.6 GHz, the subcarrier spacing can be 120 KHz, 240 KHz, and 480 KHz, and the highest can reach 960 KHz. Among them, when the SCS is 120 KHz and when the SCS is 240 KHz, the NR system has already specified the OFDM symbol index value of the set SSB position relative to the starting point of the SSB semi-wireless frame. Details are not described herein again in this embodiment.

[0125] In the embodiments of the present disclosure, the scenarios with subcarrier spacings of 480 KHz and 960 KHz will be described in detail.

[0126] In some embodiments of the present disclosure, the subcarrier spacing is 480 KHz. In response to the subcarrier spacing being 480 KHz, the OFDM symbol index value range of the first OFDM symbol at each SSB position in the semi-wireless frame is {16, 21, 26, 31, 36, 41, 46, 51} + 112n, where n takes a value of 0 or 1. Each OFDM symbol index value within the value range corresponds to a set SSB position, and two SSB positions are set within each time slot.

[0127] In some embodiments of the present disclosure, the subcarrier spacing is 960 KHz. In response to the subcarrier spacing being 960 KHz, the OFDM symbol index value range of the first OFDM symbol at each SSB position in the semi-wireless frame is {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91} + 112n, where n takes a value of 0 or 1. Each OFDM symbol index value within the value range corresponds to a set SSB position, and two SSB positions are set within each time slot.

[0128] Step 402: Determine the actual transmission position of the target SSB according to the OFDM symbol index value of each SSB position relative to the starting point of the wireless frame in the wireless frame and the position indication information sent by the network device.

[0129] After learning the OFDM symbol index value range of the first OFDM symbol at each SSB position in the semi-wireless frame according to the subcarrier spacing, and combining the position indication information sent by the network device, the actual transmission position of the target SSB in the semi-wireless frame can be determined.

[0130] Among them, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0131] In a possible scenario, the network device sends a target SSB, and the terminal device that receives the target SSB is an initially accessing terminal device. The terminal device detects the target SSB, and the terminal device needs to know the timing information in the target SSB to achieve the purpose of downlink time synchronization. The timing information that the terminal device needs to know includes the semi-wireless frame time slot index and the OFDM symbol index in the time slot.

[0132] The actual transmission position of the target SSB in the semi-wireless frame is represented by the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot. In order for the terminal device to calculate the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot, it needs to know the position of the target SSB in the SSB burst set. The transmission of an SSB burst set is limited within a semi-wireless frame. An SSB burst set contains multiple SSBs. The arrangement order of each SSB in the SSB burst set and the number of slots in the semi-wireless frame determine the specific slot of the SSB in the semi-wireless frame and the OFDM symbol position in that slot. In order for the terminal device to know the position of the target SSB in the SSB burst set, the network device carries the sequence number of the target SSB in the SSB burst set in the target SSB, that is, the SSB time index. For example: the SSB time index is 2, that is, the corresponding target SSB is the 3rd SSB position in the semi-wireless frame.

[0133] In order for the terminal device to determine the position of the target SSB in the semi-wireless frame according to the detected SSB time index, the OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame are fixedly set in various scenarios. According to the detected SSB time index and the fixedly set OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame, the terminal device can determine the actual transmission position of the target SSB in the semi-wireless frame, that is, at least one of the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index of the SSB in that slot.

[0134] For example, when the subcarrier spacing is 480 KHz, the terminal device can determine that the target SSB is the 3rd SSB position in the semi-wireless frame according to the SSB time index of 2. The value range of the OFDM symbol index is {16, 21, 26, 31, 36, 41, 46, 51}+112n, that is, the index value of the OFDM symbol of the target SSB relative to the starting point of the semi-wireless frame is 26.

[0135] In another scenario, the terminal device that has received the target SSB has completed initial cell search and accessed the network device. The network device can indicate the actual transmission position by sending high-layer parameters. The NR protocol stipulates the maximum number of SSBs in an SSB burst set within each frequency range. In actual system deployment, the network can configure the position and number of SSBs actually transmitted in the SSB burst set of each cell according to the size of the coverage area and the angular range covered by each SSB beam. That is to say, the number of SSBs actually transmitted within an SSB burst set can be less than or equal to the maximum number stipulated by the protocol. The untransmitted SSB resources can be used for the transmission of PDSCH, etc. As a possible implementation, the network device notifies the terminal device of the actual transmission position, including the SSB position and number, through high-layer parameters such as ssb-PositionsInBurst, so that the terminal device can correctly perform rate matching when receiving PDSCH. For example: The high-layer parameter can be in the form of a bitmap, and each bit represents whether the corresponding SSB position is actually used for the transmission of the target SSB, that is, whether it is the actual transmission position, so that the terminal device can determine the actual transmission position of the target SSB according to the high-layer parameter.

[0136] In the embodiments of the present disclosure, according to the SSB positions set in the semi-wireless frame, the actual transmission position of the target SSB is determined, where there is at least one OFDM symbol interval between the SSB positions set in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions. The SSB positions set in the semi-wireless frame are configured for the operating frequency band greater than 52.6 GHz, and can be applied to the transmission of SSB in a scenario with a higher subcarrier spacing.

[0137] Figure 5 FIG. is a schematic structural diagram of a device for determining an SSB position provided by an embodiment of the present disclosure. The device provided in this embodiment can be applied to a network device with an operating frequency band greater than 52.6 GHz. The device includes:

[0138] A determination module 51, configured to determine the actual transmission position of the target SSB according to the SSB positions set in the wireless frame, where there is at least one OFDM symbol interval between the SSB positions set in the wireless frame, and at least one time slot in the wireless frame contains two SSB positions.

[0139] In the embodiments of the present disclosure, the mentioned wireless frame can be one or more wireless frames, or a semi-wireless frame. Subsequently, the semi-wireless frame will be used as an example for related description. Those skilled in the art can understand that on this basis, the SSB positions can also be set in one or more wireless frames, and all the above methods are within the scope of this embodiment.

[0140] The design scheme for setting the positions of each SSB in a semi-wireless frame can be referred to as a pattern or configuration. The positions of each SSB set in the semi-wireless frame can meet the following setting conditions:

[0141] There is at least one OFDM symbol interval between the positions of each SSB in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions.

[0142] The following is an explanation of this setting condition:

[0143] In the semi-wireless frame, there needs to be an interval of one or more OFDM symbols between two adjacent SSB positions. The OFDM symbols in the interval can be used for beam-based Listen Before Talk (LBT) in the unlicensed band. That is, the terminal device determines the beam directions of one or more beams to be monitored, i.e., the beam directions to be monitored, so as to determine the beams to be monitored that need to be listened to. The terminal device monitors one or more beams to be monitored using the OFDM symbols in the interval between two adjacent SSB positions to determine the beam suitable for data transmission, and thus can complete beam-based LBT.

[0144] At least one time slot in the semi-wireless frame contains two SSB positions, so that at least one OFDM symbol is included in at least one time slot for the terminal device to complete beam-based LBT.

[0145] In the downlink synchronization process of NR, if the target SSB actually transmitted is the cell-defined SSB, after the terminal device blindly detects the target SSB, it also needs to find the corresponding CORESET0 according to the target SSB, and then blindly detect the PDCCH in CORESET0 to obtain DCI information, and then find the PDSCH carrying SIB1. NR defines several possible multiplexing patterns of SSB and CORESET0. As a possible implementation, the target SSB actually transmitted and its corresponding CORESET0 appear in the same OFDM symbol and are multiplexed in the frequency domain. That is, the target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

[0146] For a design scheme of the SSB position in a semi-wireless frame, it is applicable to the licensed band, or, it is applicable to the unlicensed band, or it can also be applicable to both the licensed band and the unlicensed band. That is, the design scheme of the SSB position in the semi-wireless frame applicable to the unlicensed band may be the same as or different from the design scheme of the SSB position in the semi-wireless frame applicable to the licensed band.

[0147] In some possible embodiments of the present disclosure, in the unlicensed frequency band, the positions of each SSB set in the design solution in the semi-wireless frame may further conform to the alternative SSB positions set in the semi-wireless frame, and the alternative SSB positions are used for SSB transmission in the unlicensed frequency band. For example, when the SSB transmission period, that is, the DRS period, is 5 ms, for subcarrier spacings of 480 KHz and 960 KHz, 3 or 6 alternative SSB positions may be set. Since there are more alternative SSB positions, there is no need for QCL value for relevant indication.

[0148] In some other possible embodiments of the present disclosure, in the unlicensed frequency band, the positions of each SSB set in the design solution in the semi-wireless frame may further conform to that at least one of the SSB positions in the semi-wireless frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM symbols can be used for uplink transmission. The uplink transmission here may include uplink control or uplink data, and may also include a random access channel. Since the adjacent OFDM symbols can be used for uplink transmission and the SSB position corresponds to the same beam as the adjacent OFDM symbol, in some possible scenarios, the terminal device can achieve uplink transmission without performing LBT.

[0149] In some other possible embodiments of the present disclosure, in the licensed frequency band, the positions of each SSB set in the design solution in the semi-wireless frame may further conform to that the total number of SSB positions set in the semi-wireless frame is m times L, where m is a natural number not equal to zero, and L is the maximum number of SSBs included in the SSB burst set. The total number of SSB positions is an integer multiple of the maximum number of SSBs included in the SSB burst set. Thus, in this design solution, the requirement for repeated SSB transmission can be met. For example, when the maximum number of SSBs included in the SSB burst set is 64, the total number of SSB positions set in the semi-wireless frame is 64m, meeting the requirement for m times of repeated transmission. As a possible implementation manner, in order to simplify the relevant configuration information, for example, cancel the expression of the QCL value for the actual number of SSBs in the SSB burst set, the maximum number of SSBs included in the SSB burst set can be set to a fixed value.

[0150] The sending module 52 is configured to send the indication information of the actual transmission position to the terminal device.

[0151] Wherein, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0152] As a possible scenario, a network device transmits a target SSB of the actual transmission location, and the terminal device that receives the target SSB is the terminal device for initial access. When the terminal device detects the target SSB, it needs to obtain the timing information in the target SSB to achieve downlink time synchronization. The timing information that the terminal device needs to obtain includes the semi-wireless frame slot index and the OFDM symbol index in the slot.

[0153] The actual transmission location of the target SSB in the semi-wireless frame is represented by the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot. To calculate the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index in the slot, it is necessary to know the position of the target SSB in the SSB burst set. The transmission of an SSB burst set is restricted within a semi-wireless frame. An SSB burst set contains multiple SSBs. The arrangement order of each SSB in the SSB burst set and the number of slots in the semi-wireless frame determine the specific slot of the SSB in the semi-wireless frame and the OFDM symbol position in that slot. To enable the terminal device to know the position of the target SSB in the SSB burst set, the network device carries the sequence number of the target SSB in the SSB burst set, that is, the SSB time index, in the target SSB.

[0154] To enable the terminal device to determine the position of the target SSB in the semi-wireless frame according to the detected SSB time index, the OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame are also fixedly set in various scenarios. According to the detected SSB time index and the fixedly set OFDM symbol index values of the positions of each SSB in the semi-wireless frame relative to the starting point of the semi-wireless frame, the terminal device can determine the actual transmission location of the target SSB in the semi-wireless frame, that is, at least one of the slot index of the target SSB in the semi-wireless frame and the OFDM symbol index of the SSB in that slot.

[0155] In another scenario, the terminal device that has received the target SSB has completed initial cell search and accessed the network device. The network device can indicate the actual transmission position by sending high-layer parameters. The NR protocol stipulates the maximum number of SSBs in an SSB burst set within each frequency range. In actual system deployment, the network can configure the position and number of SSBs actually transmitted in each cell's SSB burst set according to the size of the coverage area and the angular range covered by each SSB beam. That is to say, the number of SSBs actually transmitted within an SSB burst set can be less than or equal to the maximum number stipulated by the protocol. The untransmitted SSB resources can be used for the transmission of PDSCH, etc. As a possible implementation, the network device notifies the terminal device of the actual transmission position, including the SSB position and number, through high-layer parameters such as ssb-PositionsInBurst, so that the terminal device can correctly perform rate matching when receiving PDSCH.

[0156] It should be noted that the foregoing Figure 1 and Figure 2 the explanatory description corresponding to the method implementation also applies to the device of this embodiment. The principle is the same and will not be elaborated here.

[0157] In the embodiments of the present disclosure, according to the SSB positions set in the semi-wireless frame, the actual transmission position of the target SSB is determined. Among them, there is at least one OFDM symbol interval between the SSB positions set in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions. The SSB positions set in the semi-wireless frame are configured for the operating frequency band greater than 52.6 GHz and can be applied to the transmission of SSBs in a scenario with a relatively high subcarrier spacing. In addition, it should be noted that the SSB positions set in the semi-wireless frame provided in the embodiments of the present disclosure can be used for the cell-defined SSBs with a subcarrier spacing less than or equal to 240 KHz, or the cell-defined SSBs with a subcarrier spacing greater than 240 KHz, or the transmission of non-cell-defined SSBs.

[0158] Figure 6 FIG. 14 is a schematic structural diagram of another apparatus for determining the SSB position provided by the embodiments of the present disclosure. The apparatus provided in this embodiment is applied to a terminal device, and the operating frequency band of the terminal device can be greater than 52.6 GHz. The apparatus includes:

[0159] A determination module 61, configured to determine the actual transmission position of the target SSB actually transmitted in the wireless frame according to the position indication information sent by the network device and the SSB positions set in the wireless frame; among them, there is at least one OFDM symbol interval between the SSB positions set in the wireless frame, and at least one time slot in the wireless frame contains two SSB positions.

[0160] In the embodiments of the present disclosure, the wireless frame mentioned may be one or more wireless frames, or a semi-wireless frame. Subsequently, the semi-wireless frame will be taken as an example for related description. Those skilled in the art can understand that, on this basis, the positions of each SSB can also be set in one or more wireless frames, and all the above methods are within the scope of this embodiment.

[0161] The design scheme for setting the positions of each SSB in the semi-wireless frame can be referred to as a pattern or a layout. The positions of each SSB set in the semi-wireless frame can meet the following setting conditions:

[0162] There is at least one OFDM symbol interval between the positions of each SSB in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions.

[0163] The following is an explanation of this setting condition:

[0164] In the semi-wireless frame, there needs to be an interval of one or more OFDM symbols between two adjacent SSB positions. The OFDM symbols in the interval can be used for beam-based LBT in the unlicensed band. That is to say, the terminal device determines the beam directions of one or more beams to be monitored, namely the beam directions to be monitored, so as to determine the beams to be monitored that need to be listened to. The terminal device listens to one or more beams to be monitored using the OFDM symbols in the interval between two adjacent SSB positions to determine the beam suitable for data transmission, and then can complete the beam-based LBT.

[0165] At least one time slot in the semi-wireless frame contains two SSB positions, so that at least one OFDM symbol is included in at least one time slot for the terminal device to complete the beam-based LBT.

[0166] In the downlink synchronization process of NR, if the target SSB actually transmitted is the cell-defined SSB, after the terminal device blindly detects the target SSB, it also needs to find the corresponding CORESET0 according to the target SSB, and then blindly detect the PDCCH in the CORESET0 to obtain DCI information, and then find the PDSCH carrying SIB1. NR defines several possible multiplexing patterns of SSB and CORESET0. As a possible implementation, the target SSB actually transmitted and its corresponding CORESET0 appear in the same OFDM symbol and are multiplexed in the frequency domain. That is to say, the target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

[0167] For a design scheme of the SSB position in a semi-wireless frame, it is applicable to the licensed band, or to the unlicensed band, or can be applicable to both the licensed band and the unlicensed band. That is to say, the design scheme of the SSB position in the semi-wireless frame applicable to the unlicensed band may be the same as or different from the design scheme of the SSB position in the semi-wireless frame applicable to the licensed band.

[0168] In some other possible embodiments of the present disclosure, in the unlicensed band, the SSB positions set in the design scheme in the semi-wireless frame may further conform to that there are alternative SSB positions set in the semi-wireless frame, and the alternative SSB positions are used for SSB transmission in the unlicensed band. For example, when the SSB transmission period, that is, the DRS period, is 5 ms, for subcarrier spacings of 480 KHz and 960 KHz, 3 or 6 alternative SSB positions can be set. Since there are more alternative SSB positions, there is no need for QCL value for relevant indication.

[0169] In some other possible embodiments of the present disclosure, in the unlicensed band, the SSB positions set in the design scheme in the semi-wireless frame may further conform to that at least one of the SSB positions in the semi-wireless frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM can be used for uplink transmission. The uplink transmission here can include uplink control or uplink data, and can also include a random access channel. Since the adjacent OFDM symbols can be used for uplink transmission and the SSB position corresponds to the same beam as the adjacent OFDM symbol, in some possible scenarios, the terminal device can achieve uplink transmission without performing LBT.

[0170] In some other possible embodiments of the present disclosure, in the licensed band, the SSB positions set in the design scheme in the semi-wireless frame may further conform to that the total number of SSB positions set in the semi-wireless frame is m times L, where m is a natural number not equal to zero, and L is the maximum number of SSBs included in the SSB burst set. The total number of SSB positions is an integer multiple of the maximum number of SSBs included in the SSB burst set. Thus, under this design scheme, the requirement for repeated SSB transmission can be met. For example, when the maximum number of SSBs included in the SSB burst set is 64, the total number of SSB positions set in the semi-wireless frame is 64m, meeting the requirement for m times of repeated transmission. As a possible implementation manner, in order to simplify relevant configuration information, for example, cancel the expression of the QCL value for the actual number of SSBs in the SSB burst set, the maximum number of SSBs included in the SSB burst set can be set to a fixed value.

[0171] In the embodiments of the present disclosure, the indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

[0172] As a possible scenario, a network device transmits a target SSB for actual transmission, and the terminal device that receives the target SSB is a terminal device for initial access. The terminal device detects the target SSB, and the terminal device needs to obtain the timing information in the target SSB to achieve downlink time synchronization. The timing information that the terminal device needs to obtain includes the semi-radio frame time slot index and the OFDM symbol index in the time slot.

[0173] The actual transmission position of the target SSB in the semi-radio frame is represented by the time slot index of the target SSB in the semi-radio frame and the OFDM symbol index in the time slot. To deduce the time slot index of the target SSB in the semi-radio frame and the OFDM symbol index in the time slot, it is necessary to know the position of the target SSB in the SSB burst set. The transmission of an SSB burst set is restricted within a semi-radio frame. An SSB burst set contains multiple SSBs. The arrangement order of each SSB in the SSB burst set and the number of time slots in the semi-radio frame determine the specific time slot of the SSB in the semi-radio frame and the OFDM symbol position in the time slot. To enable the terminal device to know the position of the target SSB in the SSB burst set, the network device carries the sequence number of the target SSB in the SSB burst set, that is, the SSB time index, in the target SSB.

[0174] To enable the terminal device to determine the position of the target SSB in the semi-radio frame according to the detected SSB time index, the OFDM symbol index values of the positions of each SSB in the semi-radio frame relative to the starting point of the semi-radio frame are also fixedly set in various scenarios. According to the detected SSB time index and the fixedly set OFDM symbol index values of the positions of each SSB in the semi-radio frame relative to the starting point of the semi-radio frame, the terminal device can determine the actual transmission position of the target SSB in the semi-radio frame, that is, at least one of the time slot index of the target SSB in the semi-radio frame and the OFDM symbol index of the SSB in the time slot.

[0175] In some embodiments of the present disclosure, the subcarrier spacing is 480 KHz. In response to the subcarrier spacing being 480 KHz, the value range of the OFDM symbol index value of the first OFDM symbol of each of the SSB positions in the semi-radio frame is {16, 21, 26, 31, 36, 41, 46, 51} + 112n, where n takes a value of 0 or 1. Each OFDM symbol index value within the value range corresponds to a set SSB position, and two SSB positions are set within each time slot.

[0176] In some embodiments of the present disclosure, the subcarrier spacing is 960 KHz. In response to the subcarrier spacing being 960 KHz, the OFDM symbol index value of the first OFDM symbol at each SSB position ranges from {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91} + 112n in the semi-wireless frame, where n takes a value of 0 or 1. Each OFDM symbol index value within the range corresponds to a set SSB position, and two SSB positions are set within each time slot.

[0177] For example, when the subcarrier spacing is 480 KHz, the terminal device can determine that the target SSB is the 3rd SSB position in the semi-wireless frame according to the SSB time index of 2, and the OFDM symbol index value ranges from {16, 21, 26, 31, 36, 41, 46, 51} + 112n, that is, the index value of the OFDM symbol of the target SSB relative to the starting point of the semi-wireless frame is 26.

[0178] In another scenario, the terminal device that has received the target SSB has completed the initial cell search and accessed the network device. The network device can indicate the actual transmission position by sending high-layer parameters. The NR protocol stipulates the maximum number of SSBs in an SSB burst set within each frequency range. In actual system deployment, the network can configure the position and number of SSBs actually transmitted in the SSB burst set of each cell according to the size of the coverage area and the angular range covered by each SSB beam. That is to say, the number of SSBs actually transmitted within an SSB burst set can be less than or equal to the maximum number stipulated by the protocol. The untransmitted SSB resources can be used for the transmission of PDSCH, etc. As a possible implementation, the network device notifies the terminal device of the actual transmission position, including the SSB position and number, through high-layer parameters, such as ssb-PositionsInBurst, so that the terminal device can correctly perform rate matching when receiving PDSCH.

[0179] It should be noted that the foregoing Figure 3 and Figure 4 The explanatory description corresponding to the method implementation also applies to the device in this embodiment, with the same principle and will not be elaborated here.

[0180] In the embodiments of the present disclosure, the actual transmission position of the target SSB is determined according to the SSB positions set in the semi-wireless frame, where there is at least one OFDM symbol interval between the SSB positions set in the semi-wireless frame, and at least one time slot in the semi-wireless frame contains two SSB positions. The SSB positions set in the semi-wireless frame are configured for operating frequency bands greater than 52.6 GHz and can be applied to SSB transmission in scenarios with a relatively high subcarrier spacing.

[0181] To implement the above embodiments, the present disclosure also provides a communication device.

[0182] The communication device provided by the embodiments of the present disclosure includes a processor, a transceiver, a memory, and an executable program stored on the memory and capable of running on the processor. When the processor runs the executable program, it executes the foregoing method.

[0183] The communication device may be the foregoing base station or terminal.

[0184] The processor may include various types of storage media, which are non-temporary computer storage media and can continue to store the information thereon after the communication device loses power. Here, the communication device includes a base station or a terminal.

[0185] The processor may be connected to the memory through a bus or the like, and is used to read the executable program stored on the memory. For example, such as Figures 1 to 4 at least one of them.

[0186] To implement the above embodiments, the present disclosure also provides a computer storage medium.

[0187] The computer storage medium provided by the embodiments of the present disclosure stores an executable program; after the executable program is executed by the processor, it can implement the foregoing method. For example, such as Figures 1 to 4 at least one of them.

[0188] Figure 7 It is a block diagram of a terminal device provided by the embodiments of the present disclosure. The terminal device 700 may be, for example, a mobile phone, a computer, a digital broadcast user device, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0189] Referring to Figure 7 , the terminal device 700 may include at least one of the following components: a processing component 702, a memory 704, a power component 706, a multimedia component 708, an audio component 710, an input / output (I / O) interface 712, a sensor component 714, and a communication component 716.

[0190] The processing component 702 generally controls the overall operation of the terminal device 700, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 702 may include at least one processor 720 to execute instructions to complete all or part of the steps of the above-mentioned methods. In addition, the processing component 702 may include at least one module to facilitate the interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate the interaction between the multimedia component 708 and the processing component 702 to perform any of the above-mentioned methods in the base station, for example, as Figures 1 to 2 the method shown.

[0191] The memory 704 is configured to store various types of data to support the operation of the terminal device 700. Examples of such data include instructions for any application or method operating on the terminal device 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0192] The power component 706 provides power to various components of the terminal device 700. The power component 706 may include a power management system, at least one power source, and other components associated with generating, managing, and distributing power for the terminal device 700.

[0193] The multimedia component 708 includes a screen that provides an output interface between the terminal device 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes at least one touch sensor to sense touches, swipes, and gestures on the touch panel. The touch sensor can not only sense the boundaries of touch or swipe actions, but also detect the wake-up time and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 708 includes a front camera and / or a rear camera. When the terminal device 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

[0194] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC) that is configured to receive external audio signals when the terminal device 700 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 704 or sent via the communication component 816. In some embodiments, the audio component 710 further includes a speaker for outputting audio signals.

[0195] The I / O interface 712 provides an interface between the processing component 702 and a peripheral interface module, and the peripheral interface module may be a keyboard, a click wheel, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

[0196] The sensor component 714 includes at least one sensor for providing an assessment of various aspects of the state of the terminal device 700. For example, the sensor component 714 can detect the open / closed state of the device 700, the relative positioning of components, such as the display and keypad of the terminal device 700. The sensor component 714 can also detect a change in the position of the terminal device 700 or a component of the terminal device 700, the presence or absence of user contact with the terminal device 700, the orientation or acceleration / deceleration of the terminal device 700, and a change in the temperature of the terminal device 700. The sensor component 714 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 714 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 714 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0197] The communication component 716 is configured to facilitate communication between the terminal device 700 and other devices in a wired or wireless manner. The terminal device 700 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0198] In an exemplary embodiment, the terminal device 700 may be implemented by at least one application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, microprocessor, or other electronic components for performing the above method.

[0199] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 704 including instructions, and the above instructions can be executed by a processor 720 of the terminal device 700 to complete the above method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0200] As Figure 8 shown, it is a schematic structural diagram of a network device provided by an embodiment of the present disclosure. For example, the network device 800 may be provided as a network device. Referring to Figure 8 , the network device 800 includes a processing component 822, which further includes at least one processor, and memory resources represented by a memory 832 for storing instructions executable by the processing component 822, such as application programs. The application programs stored in the memory 832 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 822 is configured to execute instructions to perform any of the above methods for the foregoing applications in the base station, for example, as Figures 3 to 4 shown in the method.

[0201] The network device 800 may further include a power supply component 826 configured to perform power management of the network device 800, a wired or wireless network interface 850 configured to connect the network device 800 to the network, and an input / output (I / O) interface 858. The network device 800 may operate based on an operating system stored in the memory 832, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

[0202] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed herein. The specification and embodiments are only to be considered exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0203] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A method for determining the position of SSB, characterized in that, The method is applicable to network devices, and the method includes: Determine the actual transmission position of the target SSB according to the set SSB positions in the radio frame; Send indication information of the actual transmission position to the terminal device; Wherein, there is at least one OFDM symbol interval between the set SSB positions in the radio frame, and at least one time slot in the radio frame contains two SSB positions, In the unlicensed band, at least one of the SSB positions in the radio frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM is used for uplink transmission; In the licensed band, the total number of the set SSB positions in the radio frame is m times L, where m is a natural number not equal to 0, and L is the maximum number of SSBs included in the SSB burst set.

2. The determination method according to claim 1, wherein In the unlicensed band, alternative SSB positions are set in the radio frame, and the alternative SSB positions are used for SSB transmission in the unlicensed band.

3. The determination method according to claim 1, wherein The target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

4. The determination method according to any one of claims 1-3, characterized in that, The actual transmission position is part of the set SSB positions.

5. The determination method according to any one of claims 1-3, characterized in that The indication information of the actual transmission position includes at least one of a high-layer parameter and an SSB time index.

6. The determination method according to any one of claims 1-3, wherein In response to the subcarrier spacing being 480 KHz, the OFDM symbol index value range of the first OFDM symbol of each of the SSB positions in the radio frame is {16, 21, 26, 31, 36, 41, 46, 51}+112n, where n takes a value of 0 or 1.

7. The determination method according to any one of claims 1-3, wherein In response to the subcarrier spacing being 960 KHz, the OFDM symbol index value range of the first OFDM symbol of each of the SSB positions in the radio frame is {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91}+112n, where n takes a value of 0 or 1.

8. The determination method according to claim 1, wherein The target SSB is a cell-defined SSB with a subcarrier spacing less than or equal to 240 KHz, or a cell-defined SSB with a subcarrier spacing greater than 240 KHz, or a non-cell-defined SSB.

9. A method for determining the position of an SSB, characterized in that, The method is applicable to terminal devices, and the method includes: Determine the actual transmission position of the target SSB actually transmitted in the radio frame according to the position indication information sent by the network device and the set SSB positions in the radio frame; Wherein, there is at least one OFDM symbol interval between the set SSB positions in the radio frame, and at least one time slot in the radio frame contains two SSB positions, In the unlicensed band, at least one of the SSB positions in the radio frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM is used for uplink transmission; In the authorized frequency band, the total number of the SSB positions set in a radio frame is m times L, where m is a natural number not equal to 0, and L is the maximum number of SSBs included in an SSB burst set.

10. The determination method according to claim 9, wherein In the unlicensed frequency band, alternative SSB positions are set in a radio frame, and the alternative SSB positions are used for SSB transmission in the unlicensed frequency band.

11. The determination method according to claim 9, wherein The target SSB and the corresponding control resource set CORESET0 are synchronously carried on different subcarrier frequencies.

12. The determination method according to any one of claims 9-11, characterized in that, The position where the target SSB is actually transmitted is a part of the SSB positions set among the set SSB positions.

13. The determination method according to any one of claims 9-11, characterized in that, The position indication information includes at least one of a high-layer parameter and an SSB time index.

14. The determination method according to any one of claims 9-11, wherein In response to the subcarrier spacing being 480 KHz, the OFDM symbol index value range of the first OFDM symbol of each of the SSB positions in the radio frame is {16, 21, 26, 31, 36, 41, 46, 51}+112n, where n takes a value of 0 or 1.

15. The determination method according to any one of claims 9-11, wherein In response to the subcarrier spacing being 960 KHz, the OFDM symbol index value range of the first OFDM symbol of each of the SSB positions in the radio frame is {16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91}+112n, where n takes a value of 0 or 1.

16. The determination method according to claim 9, wherein The target SSB is a cell-defined SSB with a subcarrier spacing less than or equal to 240 KHz, or a cell-defined SSB with a subcarrier spacing greater than 240 KHz, or a non-cell-defined SSB.

17. A device for determining the position of an SSB, characterized in that, The apparatus is applicable to a network device, and the apparatus includes: A determination module, configured to determine the actual transmission position of a target SSB according to each SSB position set in a radio frame; A sending module, configured to send indication information of the actual transmission position to a terminal device; Wherein, there is at least one OFDM symbol interval between each of the SSB positions set in the radio frame, and at least one time slot in the radio frame contains two SSB positions, In the unlicensed frequency band, at least one of the SSB positions in the radio frame corresponds to the same beam as an adjacent OFDM symbol, and the adjacent OFDM is used for uplink transmission; In the authorized frequency band, the total number of the SSB positions set in a radio frame is m times L, where m is a natural number not equal to 0, and L is the maximum number of SSBs included in an SSB burst set.

18. A device for determining the position of an SSB, characterized in that, The apparatus is applicable to a terminal device, and the apparatus includes: A determination module, configured to determine the actual transmission position of the actually transmitted target SSB in the radio frame according to the position indication information sent by a network device and each SSB position set in the radio frame. Among them, there is at least one OFDM symbol interval between each SSB position set in the radio frame, and at least one time slot in the radio frame contains two SSB positions. In the unlicensed band, at least one of the SSB positions in the radio frame corresponds to the same beam as the adjacent OFDM symbol, and the adjacent OFDM is used for uplink transmission. In the licensed band, the total number of the SSB positions set in the radio frame is m times L, where m is a natural number not equal to 0, and L is the maximum number of SSBs included in the SSB burst set.

19. A communication device, characterized in that, It includes: A transceiver; A memory; A processor, which is respectively connected to the transceiver and the memory, and is configured to control the wireless signal transceiver of the transceiver by executing the computer-executable instructions on the memory, and can implement the method according to any one of claims 1 to 8 or 9 to 16.

20. A computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method according to any one of claims 1 to 8 or 9 to 16 can be implemented.

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