terminal and base station

Abstract

A terminal includes: a receiving unit that receives a synchronization signal block in an unlicensed band domain of a high-frequency band above the frequency band of a low-frequency band (FR1) and a high-frequency band (FR2) in a new radio (NR) system; and a control unit that determines an index of a transmission candidate position of the synchronization signal block based on a sequence of decall reference signals of a broadcast channel included in the synchronization signal block and the payload of the broadcast channel.

Description

Technical Field

[0001] This invention relates to terminals and base stations in wireless communication systems. Background Technology

[0002] In 3GPP (Third Generation Partnership Project) Release 15 NR (New Radio) and Release 16 NR, the frequency band up to 52.6 GHz was considered. Regarding the extension of NR to frequency bands above 52.6 GHz, Release 16 included a TSG RAN (Technical Specification Group Radio Access Network) level study item that investigated various regulations, use cases, and requirements. This study item was completed in December 2019, and in Release 17, agreements were reached for a study item and a work item to practically extend the specification above 52.6 GHz.

[0003] In the research project of version 16, the frequency band for NR was envisioned to be extended from 52.6 GHz to 114.25 GHz. However, in version 17, due to time constraints, the frequency band for research is limited to 52.6 GHz to 71 GHz. Furthermore, when extending the NR frequency band from 52.6 GHz to 71 GHz, it is envisioned that the extension will be performed according to the current NR's FR2 (Frequency Range 2) design.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent literature 1: 3GPP TSG RAN Meeting #86, RP-193229, Sitges, Spain, December 9-12, 2019

[0007] Non-patent document 2: 3GPP TS 38.101-2V15.8.0 (2019-12)

[0008] Non-patent document 3: 3GPP TSG-RAN4 Meeting #92bis, R4-1912870, Chongqing, China, 14-18 Oct, 2019

[0009] Non-patent literature 4: 3GPP TSG-RAN4 Meeting #93, R4-1916167, Reno, United States, 18th-22nd November, 2019

[0010] Non-patent document 5: 3GPP TSG-RAN4 Meeting #92bis, R4-1912982, Chongqing, China, October 14-18, 2019

[0011] Non-patent document 6: 3GPP TSG-RAN4 Meeting #93, R4-1915982, Reno, US, November 18-22, 2019

[0012] Non-patent document 7: 3GPP TS 38.331 V15.8.0 (2019-12)

[0013] Non-patent document 8: 3GPP TS 38.213 V15.8.0 (2019-12) Summary of the Invention

[0014] The problem that the invention aims to solve

[0015] The 52.6 GHz to 71 GHz band includes a 60 GHz unlicensed band. Therefore, as functional extensions corresponding to the 52.6 GHz to 71 GHz band, it may be necessary to extend functional extensions for both licensed and unlicensed frequencies.

[0016] The following technology is required: efficient and reliable SSB transmission in the high-frequency band above the FR2 band of NR, with minimal changes from the FR2 specification.

[0017] Methods for solving problems

[0018] According to one aspect of the present invention, a terminal is provided, comprising: a receiving unit that receives a synchronization signal block in an unlicensed band domain of a high-frequency band above the frequency band of a low-frequency band, namely FR1, and a high-frequency band, namely FR2, within a new radio interface (NR) system; and a control unit that determines an index of a transmission candidate position of the synchronization signal block based on a sequence of decall reference signals of a broadcast channel included in the synchronization signal block and the payload of the broadcast channel.

[0019] Effects of the Invention

[0020] According to an embodiment, the following technology is provided: in a high-frequency band above the FR2 band of NR, efficient and reliable SSB transmission can be achieved with minimal changes from the FR2 specification. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the communication system in this embodiment.

[0022] Figure 2 This is a diagram showing an example of 20 SSB transmission candidate locations.

[0023] Figure 3 This is a diagram illustrating an example of the structure of the SSB resource mapping imported in NR version 15.

[0024] Figure 4 This is a diagram illustrating an example of SSB burst structure Case D in FR2 of NR version 15.

[0025] Figure 5 This is a diagram illustrating an example of SSB burst structure Case E in FR2 of NR version 15.

[0026] Figure 6 This is a diagram illustrating an example of SSB burst structure Case A in FR1 of NR version 15.

[0027] Figure 7 This is a diagram illustrating an example of SSB burst structure Case C in FR1 of NR version 15.

[0028] Figure 8 This is a diagram illustrating Example 1-1 of the SSB transmission candidate locations within a time slot.

[0029] Figure 9 This is a diagram illustrating Example 1-2 of the SSB transmission candidate locations within a time slot.

[0030] Figure 10 This is a diagram illustrating Example 1-3 of the SSB transmission candidate locations within a time slot.

[0031] Figure 11 This is a diagram illustrating Example 2-1 of the SSB transmission candidate locations within a time slot.

[0032] Figure 12 This is a diagram illustrating Example 2-2, showing the candidate locations for SSB transmission within a time slot.

[0033] Figure 13 This is a diagram illustrating an example of a time slot mapping for transmit candidate locations containing SSBs in an unlicensed frequency band spanning from 52.6 GHz to 71 GHz.

[0034] Figure 14 This is another example of a time slot mapping that includes SSB transmission candidate locations in the unlicensed frequency bands spanning from 52.6 GHz to 71 GHz.

[0035] Figure 15 This is a diagram illustrating an example of deriving the SSB index based on the candidate positions of the SSB and the QCL parameters.

[0036] Figure 16 This is a diagram illustrating an example of the functional structure of a terminal.

[0037] Figure 17 This is a diagram illustrating an example of the functional structure of a base station.

[0038] Figure 18 This is a diagram illustrating an example of the hardware structure of a terminal and a base station. Detailed Implementation

[0039] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, the embodiments described below are merely examples, and the application of the present invention is not limited to the embodiments described below.

[0040] The wireless communication system in the following embodiments is envisioned to substantially follow NR, but this is only one example. The wireless communication system in this embodiment may also follow wireless communication systems other than NR (e.g., LTE) in part or all of its components.

[0041] (System Overall Structure)

[0042] Figure 1 A structural diagram of the wireless communication system according to this embodiment is shown. Figure 1 As shown, the wireless communication system of this embodiment includes a terminal 10 and a base station 20. Figure 1 The image shows one terminal 10 and one base station 20, but this is just an example and there could be multiple terminals.

[0043] Terminal 10 is a communication device with wireless communication capabilities, such as a smartphone, mobile phone, tablet computer, wearable terminal, or M2M (Machine-to-Machine) communication module. Terminal 10 receives control signals or data from base station 20 via DL and transmits control signals or data to base station 20 via UL, thereby utilizing various communication services provided by the wireless communication system. For example, the channels transmitted from terminal 10 include PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel). Alternatively, terminal 10 can be referred to as UE, and base station 20 as gNB.

[0044] In this embodiment, the duplex mode can be either TDD (Time Division Duplex) or FDD (Frequency Division Duplex).

[0045] Furthermore, in the implementation, the "configure" wireless parameters can be preset values ​​or set according to wireless parameters notified from the base station 20 or the terminal 10.

[0046] Base station 20 is a communication device that provides one or more cells and wirelessly communicates with terminal 10. The physical resources of the wireless signal are defined in the time and frequency domains. The time domain can be defined by the number of OFDM symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. Base station 20 sends synchronization signals and system information to terminal 10. Synchronization signals are, for example, NR-PSS and NR-SSS. Part of the system information is transmitted, for example, via NR-PBCH, also known as broadcast information. Synchronization signals and broadcast information can be periodically transmitted as SS blocks (SS / PBCH blocks) consisting of a predetermined number of OFDM symbols. For example, base station 20 sends control signals or data to terminal 10 via DL (Downlink) and receives control signals or data from terminal 10 via UL (Uplink). Both base station 20 and terminal 10 are capable of beamforming for signal transmission and reception. For example, the reference signal transmitted from base station 20 includes CSI-RS (Channel State Information Reference Signal), and the channels transmitted from base station 20 include PDCCH (Physical Downlink Control Channel) and PDSCH (Physical Downlink Shared Channel).

[0047] (NR expansion to frequency bands above 52.6 GHz)

[0048] In 3GPP (Third Generation Partnership Project) Release 15 NR (New Radio) and Release 16 NR, the frequency band up to 52.6 GHz was considered. Regarding the extension of NR to frequency bands above 52.6 GHz, Release 16 included a TSG RAN (Technical Specification Group Radio Access Network) level study item that investigated various regulations, use cases, and requirements. This study item was completed in December 2019, and in Release 17, agreements were reached for a study item and a work item to practically extend the specification above 52.6 GHz.

[0049] In the research project of version 16, the frequency band for NR was envisioned to be extended from 52.6 GHz to 114.25 GHz, but in version 17, the research time was also limited, such as... Figure 2 As shown, it is envisioned that the frequency band under study will be limited to 52.6 GHz to 71 GHz. Furthermore, when extending the NR's frequency band from 52.6 GHz to 71 GHz, it is envisioned that the extension will be performed according to the current NR's FR2 (Frequency Range 2) design. This is because it is envisioned that a considerable amount of time will be spent studying the new waveforms.

[0050] Furthermore, reasons for limiting the research frequency band to 52.6 GHz to 71 GHz can be cited as follows: Below 71 GHz, there are already unlicensed frequency bands such as 54 GHz to 71 GHz that can be used by various countries, and at the World Radiocommunication Conference 2019 (WRC-2019), 66 GHz to 71 GHz became the highest frequency band as a candidate for new frequency bands for IMT (International Mobile Telecommunications), and there are no frequency bands above 71 GHz that can be immediately used as licensed bands.

[0051] The current NR uses a frequency band consisting of FR1 (Frequency Range 1) corresponding to the band from 410MHz to 7.125GHz and FR2 corresponding to the band from 24.25GHz to 52.6GHz.

[0052] In addition, regarding the frequency band from 52.6 GHz to 71 GHz, the current definition of FR2 (the frequency band from 24.25 GHz to 52.6 GHz) can be changed and included in the changed FR2, or it can be replaced and separated from FR2 and set as a new FrequencyRange (Frequency Range, FR).

[0053] (The goal of the work item)

[0054] (RAN1: Characteristics of the physical layer)

[0055] A new set of one or more parameters for the operation of terminal 10 and base station 20 in the frequency band from 52.6 GHz to 71 GHz. This set of parameters addresses any impact on the physical signal / channel determined by the Study item (SI).

[0056] Features related to the timeline suitable for each new parameter set. For example, BWP (Bandwidth Part) and beam switching time, preparation time for HARQ (Hybrid Automatic Repeat Request) scheduling, UE (User Equipment) processing, PDSCH (Physical Downlink Shared Channel), PUSCH (Physical Uplink Shared Channel) / SRS (Sounding Reference Signal), and CSI (Channel State Information), as well as the calculation time.

[0057] A maximum of 64 SSB (Synchronization Signal Block) beams in the 52.6 GHz to 71 GHz band for operation in licensed and unlicensed bands.

[0058] (RAN1: Physical layer process)

[0059] A beam-based channel access mechanism is envisioned to comply with restrictions on unlicensed frequency band applications between 52.6 GHz and 71 GHz.

[0060] (RAN4: Core specifications regarding the requirements of UE, gNB, and RRM (Radio Resource Management))

[0061] Specifications for the RF core requirements of gNB and UE in the 52.6GHz to 71GHz frequency band. Includes a defined set of band domain combinations.

[0062] (SSB Overview)

[0063] The SSB (Synchronization Signal Block) is a synchronization signal / broadcast channel block consisting of a synchronization signal (SS) and a broadcast channel (PBCH). It is periodically transmitted from the base station 20 by terminal 10 at the start of communication for cell ID verification and reception timing detection. In NR (Normative Radio), the SSB is also used for reception quality measurement in each cell.

[0064] In NR version 15, the transmission period for SSBs (Service Segments) directed to the serving cell can be selected. Specifically, the transmission period can be chosen from 5ms, 10ms, 20ms, 40ms, 80ms, and 160ms. During initial access, terminal 10 cannot receive RRC (Radio Resource Control) information, so a transmission period of 20ms is assumed. Therefore, in cells used independently corresponding to initial access, it is assumed that SSBs will be transmitted mostly with a transmission period of less than 20ms.

[0065] Furthermore, regarding SSBs, the index of the beam used to actually transmit the SSB (SS / PBCH block index) can be notified. This beam index can be communicated using SIB1 or RRC signaling via an information element (IE) such as SSB-PositionsInBurst. In FR1, a maximum of 8 SSBs can be transmitted through the corresponding 8 beams, therefore the beam index is communicated using an 8-bit bitmap. In FR2, a maximum of 64 SSBs can be transmitted through the corresponding 64 beams, therefore the beam index is communicated using a 64-bit bitmap in the RRC signaling. However, including a 64-bit bitmap in SIB1 increases overhead. Therefore, when communicating the beam index in SIB1, the beam index is communicated using a total of 16 bits, including an 8-bit bitmap and an 8-bit group bitmap. That is, the 64 beams corresponding to the 64 SSBs are divided into a total of 8 groups, each containing 8 SSBs. The index of the beam of the SSB actually transmitted is indicated by using an 8-bit bitmap indicating which SSB is transmitted in each group, and an 8-bit bitmap for the entire group indicating which group of the 8 groups transmits the SSB. In addition, in FR1 and FR2 (excluding unlicensed frequencies), as described later, there is one location in each beam where SSB transmission is possible within half a frame. Therefore, the notification of the beam index (SS / PBCH block index) used to transmit the SSB can also be interpreted as a notification of which time resource within the half frame the SSB is transmitted in, for rate matching during PDSCH reception.

[0066] As an index related to SSBs, in addition to the index of the beam used to actually transmit SSBs (SS / PBCH block index) mentioned above, a candidate SSB location index is also defined. The candidate SSB location index specifies the location within a half-frame where an SSB can be transmitted via a beam. In FR1 (excluding unlicensed frequencies), a maximum of eight SSBs can be transmitted using the corresponding eight beams. Each beam only needs one location capable of transmitting an SSB within a half-frame. Therefore, by associating indices 0 to 7 with SSBs, candidate SSB location indices can be identified. Thus, three bits are needed to identify candidate SSB location indices. Eight patterns can be generated within the same cell using the sequence patterns of the DMRS (Demodulation Reference Signal) sequence of the PBCH (Physical Broadcast Channel). Therefore, the three bits used to identify candidate SSB location indices can be identified using these sequence patterns.

[0067] In FR2, a maximum of 64 SSBs can be transmitted using the corresponding 64 beams. Each beam only needs one SSB transmission location within a half-frame. Therefore, by associating indices 0 to 63 with SSBs, candidate SSB location indices can be identified. Thus, 6 bits are required to identify candidate SSB location indices. Increasing the number of modes in the PBCH DMRS sequence may reduce DMRS detection performance. Therefore, the PBCH DMRS sequence is set to 8 modes in the same cell. The remaining 3 bits used to identify the 64 candidate SSB location indices are transmitted within the PBCH payload. That is, in FR2, the 3 LSBs (Least Significant Bits) of the candidate SSB location index are identified through the PBCH DMRS sequence, and the 3 MSBs (Most Significant Bits) of the candidate SSB location index are identified through the information transmitted within the PBCH payload.

[0068] Regarding SSB-based measurements in version 15NR, a function has been introduced to notify terminal 10 of the measurement period and timing of the SSB used in the measurement (via the SMTC window (SSB-based RRM Measurement Timing Configuration window) set by the information element SSB-MTC). The SMTC window is a measurement window set by base station 20 for terminal 10 when performing SSB-based reception quality measurements, in order to notify terminal 10 of the measurement start timing, measurement period, and measurement cycle for each cell of the measurement target. The period of the SMTC window can be selected from 5ms, 10ms, 20ms, 40ms, 80ms, and 160ms. Additionally, the granularity of the SMTC window offset is 1ms. Furthermore, the duration of the SMTC window can be selected from 1ms, 2ms, 3ms, 4ms, and 5ms. Base station 20 can use the information element SSB-ToMeasure to notify the beam index of the SSB of the measurement target. For FR1, the beam index of the SSB of the measurement object can be notified via an 8-bit bitmap, while for FR2, the beam index of the SSB of the measurement object can be notified via a 64-bit bitmap.

[0069] (Functional extensions associated with SSB in New Radio Unlicensed (NR-U: New Radio Unlicensed Bandfield) version 16)

[0070] Since NR-U is an unlicensed band, it is envisioned that NR-U will coexist with other communication systems such as Wi-Fi, and other NR-U systems. Therefore, when NR-U terminal 10 and / or base station 20 begin transmitting in the unlicensed band, it is envisioned that NR-U terminal 10 and / or base station 20 perform Listen Before Talk (LBT) to confirm that there are no other terminals (e.g., terminals corresponding to Wi-Fi 802.11ac) or base stations (e.g., access points corresponding to Wi-Fi 802.11ac) transmitting in the vicinity. LBT is a communication method in which carrier sensing is performed before transmission begins, and transmission can only be carried out for a predetermined duration if it can be confirmed that the channel is not being used by other nearby systems.

[0071] Since LBT does not transmit reference signals like SSBs, which are used to maintain cell connectivity and measure signal quality, it is not preferable. However, transmitting SSBs is also not preferable when other systems are transmitting signals. Therefore, the candidate locations for SSB transmission are expanded. As with the case where other systems transmit signals at the predetermined candidate location for SSB transmission, if SSBs cannot be transmitted at the predetermined candidate location, they can be transmitted at a later candidate location. In the unlicensed band of FR1, a subcarrier spacing (SCS) of 15 kHz and a SCS of 30 kHz can be used for SSBs. In the unlicensed band of FR1, when using a 15 kHz SCS, the candidate locations for SSB transmission are expanded to 10. Furthermore, in the unlicensed band of FR1, when using a 30 kHz SCS, the candidate locations for SSB transmission are expanded to 20. That is, there is at least one location in each beam where SSB transmission is possible within a half-frame.

[0072] For example, such as Figure 2 As shown, with an SCS of 30kHz, two SSB transmission candidate positions can be set for each time slot within a 5ms half-frame. The maximum number of SSBs that can actually be transmitted is 8. This can also be seen from... Figure 2 The required number of SSBs are transmitted sequentially from the transmission candidate position of the SSB that has successfully undergone LBT, among the 20 SSB transmission candidate positions shown.

[0073] As described above, the index for the SSB can specify an index (e.g., candidate SS / PBCH block index) indicating the location of the transmitted SSB (which can be a location in the time domain, a location in the frequency domain, or a location in both the time and frequency domains), and an index (SS / PBCH block index) indicating which beam the SSB is transmitted with.

[0074] For example, such as Figure 2 As shown, 20 candidate transmission positions (time-domain positions) for the SSB are assumed to be set at an SCS of 30kHz. Figure 2 In the example, the 20 candidate transmission positions are shown using the candidate SS / PBCH block index. The candidate SS / PBCH block index is the information needed by terminal 10 to determine the frame timing at which timing of the SSB within 5ms.

[0075] In addition, Figure 2In the example, each transmission candidate location is assigned information needed to derive an index (SS / PBCH block index) indicating which of the maximum 8 beams the SSB transmits in, namely QCL (Quasi co-location) information. For example, QCL information can be used when terminal 10 reports the quality of each beam to base station 20.

[0076] exist Figure 2 In the example, with an SCS of 30kHz, there are 10 time slots within 5ms, and each time slot contains 2 candidate positions for SSB transmission. For these 20 candidate positions for SSB transmission, candidate SS / PBCH block indices from 0 to 19 are assigned sequentially from the start.

[0077] In this case, eight patterns can be used as the DMRS sequence of the PBCH, thus allowing the SSB transmission candidate positions to be assigned indices from 0 to 7 based on the patterns of the DMRS sequence of the PBCH. Figure 2 In the example, for the transmission candidate positions of SSBs with candidate SS / PBCH block indices 0 to 7, DMRS sequences 0 to 7 are associated respectively; for the transmission candidate positions of SSBs with candidate SS / PBCH block indices 8 to 15, DMRS sequences 0 to 7 are associated respectively; and for the transmission candidate positions of SSBs with candidate SS / PBCH block indices 16 to 19, DMRS sequences 0 to 3 are associated respectively. That is, when specifying the transmission candidate position of an SSB, a unique association relationship is defined with the DMRS sequence of the PBCH used.

[0078] Furthermore, such as Figure 2 As the example shows, if information equivalent to the MSB of the candidate SS / PBCH block index is obtained from the payload transmitted via the PBCH, then the candidate SS / PBCH block index can be uniquely determined using that MSB and the DMRS sequence. Furthermore, in Figure 2 In this example, base station 20 can directly notify terminal 10 of the candidate SS / PBCH block index. For instance, base station 20 can send information about the bits corresponding to the MSB of the candidate SS / PBCH block index and the DMRS of the PBCH to terminal 10. Terminal 10 can derive the candidate SS / PBCH block index based on the bits corresponding to the MSB of the candidate SS / PBCH block index and the DMRS sequence of the PBCH.

[0079] In addition, Figure 2 In the example, when base station 20 transmits 8 beams, it repeatedly transmits candidate positions every 8 SSBs. Figure 2In the example, for the transmission candidate positions of SSBs with candidate SS / PBCH block indices 0 to 7, they are associated with SS / PBCH block indices 0 to 7 respectively; for the transmission candidate positions of SSBs with candidate SS / PBCH block indices 8 to 15, they are associated with SS / PBCH block indices 0 to 7 respectively; and for the transmission candidate positions of SSBs with candidate SS / PBCH block indices 16 to 19, they are associated with SS / PBCH block indices 0 to 3 respectively.

[0080] For example, for each 20ms transmission cycle of the SSB, set Figure 2 The 5ms window shown contains 20 candidate transmission positions for SSBs. The specific candidate position from which the SSB is transmitted may change every 20ms transmission cycle of the SSB. For example, to determine whether the beam used for transmitting an SSB detected at candidate SS / PBCH block index 0 in the next 20ms transmission cycle is the same as the beam used for transmitting an SSB detected at candidate SS / PBCH block index 4 in the next 20ms transmission cycle, QCL information is needed. With a QCL of 8, due to the repetition of 8 beams, the beam used for transmitting an SSB detected at candidate SS / PBCH block index 0 is different from the beam used for transmitting an SSB detected at candidate SS / PBCH block index 4 in the next 20ms transmission cycle (i.e., different SS / PBCH block indices). Furthermore, the beams used for transmitting SSBs at candidate SS / PBCH block indices 0, 8, and 16 become the same beam (i.e., the same SS / PBCH block index).

[0081] In addition, Figure 2 In the example where base station 20 notifies terminal 10 of 4 as a QCL parameter, four beams are used. In this case, at candidate SS / PBCH block indices 0 to 3, the beams with beam indices 0, 1, 2, and 3 are associated for SSB transmission. In this case, the beams used for SSB transmission at candidate SS / PBCH block indices 0 and 4 are the same beams (i.e., the same SS / PBCH block index). For example, in one SSB transmission cycle, the beam detected at candidate SS / PBCH block index 0 for SSB transmission and the beam detected at candidate SS / PBCH block index 4 for SSB transmission in another SSB transmission cycle are identified as the same beams. For example, the beam quality can be measured by averaging them.

[0082] In addition, the parameters of QCL can be notified in the payload of PBCH.

[0083] Furthermore, in the NR-U case, there are 20 candidate transmission positions for the SSB. Based on the LBT results, the actual transmission position of the SSB may differ for each transmission cycle. Therefore, it is impossible to indicate in which candidate transmission position the SSB beam is transmitted using ssb-PositionsInBurst. However, ssb-PositionsInBurst can indicate how many SSBs were transmitted and in what mode they were transmitted.

[0084] Figure 3 This diagram illustrates an example of the SSB resource mapping structure imported in NR version 15. This SSB resource mapping structure is also adopted in NR-U version 16, and it is envisioned that it will also be adopted for the frequency band from 52.6 GHz to 71 GHz studied in NR version 17. Figure 3 The resource mapping of the SSB is shown in the figure.

[0085] The following examples illustrate mapping the 4 symbols of the SSB in the time direction to symbols in the time slot, and mapping the time slot containing the SSB transmission candidate position to time slots in time units such as 5ms. In version 15, five cases, Case A, B, C, D, and E, are defined as such mappings.

[0086] Figure 4 This is a diagram illustrating an example of the SSB burst structure Case D in FR2 of NR version 15. Figure 4 In the example, SCS is 120kHz. Figure 4 In this example, two SSBs are mapped adjacently in a 120kHz time slot. Between two consecutive time slots, a pattern of not mapping SSBs for the first four symbols and the last two symbols is alternated with another pattern of not mapping SSBs for the first two symbols and the last four symbols. After repeating this pattern for eight time slots, two time slots without SSBs are placed. By repeating this pattern, 64 candidate transmission positions for SSBs are established.

[0087] Figure 5 This is a diagram illustrating an example of the SSB burst structure Case E in FR2 of NR version 15. Figure 5 In the example, the SCS is 240kHz. In this case, the SSB's SCS is 240kHz, but a 240kHz SCS cannot be used for the data and control channels; instead, a 60kHz or 120kHz SCS is used for both. Figure 5In this example, the four SSBs are mapped adjacently in 120kHz time slots (for data). Between two consecutive 120kHz time slots, a pattern of not mapping SSBs for the first 8 symbols and the last 4 symbols is alternated, as is a pattern of not mapping SSBs for the first 4 symbols and the last 8 symbols. After repeating this pattern for eight 120kHz time slots, two 120kHz time slots without SSBs are placed. By repeating this pattern, 64 SSB transmission candidate positions are set.

[0088] Figure 6 This is a diagram illustrating an example of the SSB burst structure Case A in FR1 of NR version 15. Figure 6 In the example, SCS is 15kHz. Figure 6 In the example, within one time slot, the first 2 symbols are not mapped to an SSB, the next 4 symbols are mapped to the first SSB, the next 2 symbols are not mapped to an SSB, the next 4 symbols are mapped to the second SSB, and the next 2 symbols are not mapped to an SSB. In the licensed band domain of FR1 in NR version 15, by configuring a pattern of 4 consecutive time slots, 8 SSB transmission candidate positions are set. Furthermore, in the unlicensed band domain of FR1 in NR version 15, by configuring a pattern of 5 consecutive time slots, 10 SSB transmission candidate positions are set.

[0089] Figure 7 This is a diagram illustrating an example of the SSB burst structure Case C in FR1 of NR version 15. Figure 7 In the example, SCS is 30kHz. Figure 7 In the example, within one time slot, the first 2 symbols are not mapped to an SSB, the next 4 symbols are mapped to the first SSB, the next 2 symbols are not mapped to an SSB, the next 4 symbols are mapped to the second SSB, and the next 2 symbols are not mapped to an SSB. In the licensed band domain of FR1 in NR version 15, by configuring a pattern of 4 consecutive time slots, 8 SSB transmission candidate positions are set. Furthermore, in the unlicensed band domain of FR1 in NR version 15, by configuring a pattern of 10 consecutive time slots, 20 SSB transmission candidate positions are set.

[0090] (Regarding the research topic)

[0091] The 52.6 GHz to 71 GHz band includes a 60 GHz unlicensed band, meaning the NR system could potentially share this 60 GHz unlicensed band with other systems (e.g., WiGig (IEEE 802.11ad / ay)). Therefore, it is conceivable that terminal 10 and / or base station 20 would perform a Listen Before Talk (LBT) operation: carrier sensing before transmission begins, and transmission for a predetermined duration only if it can be confirmed that the channel is not being used by other nearby systems. In this scenario, SSB transmission may be impossible.

[0092] Since LBT does not transmit a reference signal like SSB, which is used to maintain cell connectivity and measure signal quality, it is not preferable. However, transmitting SSB is also not preferable when other systems are transmitting signals. Therefore, it is considered to expand the candidate transmission positions for SSB in the frequency band from 52.6 GHz to 71 GHz. As with the case where other systems transmit signals at the predetermined candidate transmission position for SSB, if SSB cannot be transmitted at the predetermined candidate transmission position, it can be transmitted at a subsequent candidate transmission position.

[0093] Currently, it is envisioned that a maximum of 64 SSB beams can be supported in the frequency band from 52.6 GHz to 71 GHz. However, if an SSB cannot be transmitted at the intended transmission candidate location, it is unclear whether it is possible to transmit the SSB at a subsequent transmission candidate location.

[0094] Furthermore, while it is envisioned that a new set of parameters will be introduced in the frequency band from 52.6 GHz to 71 GHz, it is unclear how many SCSs will be supported as SSBs, and it is also unclear whether the new SCSs will be the same as or different from the current FR2 SCSs (120 / 240 kHz SCSs).

[0095] In the frequency band from 52.6 GHz to 71 GHz, if an SSB cannot be transmitted at a predetermined candidate transmission position, and then becomes possible at a subsequent candidate transmission position, it is considered necessary to implement actions such as detecting the index of the SSB transmission candidate position for frame timing synchronization, and / or deriving the QCL to identify the beam index. For example, it may be necessary to interpret the bits of the PBCH payload and / or change the concept of terminal 10.

[0096] Additionally, the frequency band from 52.6 GHz to 71 GHz may include licensed frequency bands. In such licensed bands, since conflicts with transmissions from other systems are not anticipated, functional extensions as in the NR-U case may not be necessary.

[0097] Therefore, as functional extensions corresponding to the frequency bands from 52.6 GHz to 71 GHz, functional extensions for licensed frequency bands and functional extensions for unlicensed frequencies may be required.

[0098] (proposal)

[0099] Efficient and reliable SSB transmission can be achieved by making minimal changes from the FR2 specification in the frequency bands from 52.6 GHz to 71 GHz.

[0100] When using the licensed frequency bands from 52.6 GHz to 71 GHz, the candidate position for transmission of the SSB within a time slot can be specified based on possible combinations of the SSB's SCS and the SCS of the PDCCH / PDSCH.

[0101] When using unlicensed frequency bands from 52.6 GHz to 71 GHz, multiple SSB transmission candidate positions can be set for each SSB beam.

[0102] In the case of using unlicensed frequency bands from 52.6 GHz to 71 GHz, the index of the SSB's transmission candidate positions can be from 0 to 63, and the index of the SSB's transmission candidate positions can be derived from the PBCH DMRS sequence and the PBCH payload, similar to the case of FR2 in version 15 of NR. Alternatively, the index of the SSB's transmission candidate positions can also be derived from a combination of the PBCH sequence, the DMRS sequence, and the PBCH payload (e.g., a combination of the PBCH sequence and the PBCH payload).

[0103] When using unlicensed frequency bands from 52.6 GHz to 71 GHz, the SSB index can be from 0 to 63 and can be derived from the index of the SSB transmission candidate position and the QCL parameters within the PBCH payload. Furthermore, the number of candidate values ​​for the QCL parameters that can be notified in this frequency band can also differ from other frequency bands (e.g., it can be less or more than the number of candidate values ​​in the NR-U frequency band). Additionally, terminal 10 can also receive information from base station 20 indicating which time slot within the window contains the SSB transmission candidate position.

[0104] When using unlicensed frequency bands from 52.6 GHz to 71 GHz, the maximum length of the discoveryburst transmission window can be 5 ms (e.g., 2 ms when the SCS is 240 kHz), and each time slot within the window can also include SSB transmission candidate positions. Furthermore, when using unlicensed frequency bands, terminal 10 can also assume that SSB transmission within half a frame occurs within the discovery burst transmission window. The discovery burst transmission window begins from the first symbol of the first time slot within the half frame. Base station 20 can set the duration of the discovery burst transmission window for terminal 10 for each serving cell using the information element DiscoverBurst-WindowLength-r16. If the information element DiscoverBurst-WindowLength-r16 is not given, terminal 10 can assume the duration of the discovery burst transmission window is half a frame. A discovery burst, limited to a window, is a downlink transmission burst containing a set of signals and / or channels associated with the duty cycle. In addition, a burst could also be a transmission from a base station 10 containing an SSB, consisting of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), and a demodulation reference signal (DM-RS) associated with the PBCH.

[0105] In the case of using unlicensed frequency bands included in the frequency band from 52.6 GHz to 71 GHz, terminal 10 may assume that the SSB's SCS is the same as that of SIB1 PDCCH / PDSCH (or alternatively, the SSB's SCS may be twice that of SIB1 PDCCH / PDSCH).

[0106] (Regarding the licensed frequency bands included in the frequency band from 52.6 GHz to 71 GHz)

[0107] For the licensed frequency bands from 52.6 GHz to 71 GHz, the candidate transmission position of the SSB within the time slot can also be determined based on the possible combination of the SSB's SCS and the PDCCH / PDSCH SCS.

[0108] (Option 1)

[0109] The combination of SSB's SCS and PDCCH / PDSCH's SCS can be limited to the case where SSB's SCS is the same as PDCCH / PDSCH's SCS.

[0110] Figure 8 This is a diagram illustrating Example 1-1, showing candidate locations for SSB transmission within a time slot. Figure 8 In the example, reuse Figure 4 The structure of Case D is shown. The number of symbols in each time slot can also be 14. For example, the SCS as SSB and the SCS as PDCCH / PDSCH can also support 240kHz, 480kHz, and 960kHz. Figure 8 In the example, SCS and PDCCH / PDSCH are also applied when 240kHz, 480kHz, and 960kHz are supported as SSBs. Figure 4 The structure of Case D is shown. In Figure 8 In the example, when the SCS is 240kHz, the time slot length is 0.0625ms; when the SCS is 480kHz, the time slot length is 0.03125ms; and when the SCS is 960kHz, the time slot length is 0.01526ms.

[0111] exist Figure 8 In the example, two SSBs are mapped adjacently within a time slot. Between two consecutive time slots, a pattern of not mapping SSBs for the first four symbols and the last two symbols is alternated with another pattern of not mapping SSBs for the first two symbols and the last four symbols. After repeating this pattern for eight time slots, two time slots without SSBs are placed. By repeating this pattern, 64 candidate transmission positions for SSBs are established.

[0112] Figure 9 This is a diagram illustrating Example 1-2 of the SSB transmission candidate locations within a time slot. Figure 9 In the example, reuse Figure 5 The structure of Case E is shown. The number of symbols in each time slot can also be 28. For example, the SCS as SSB and the SCS as PDCCH / PDSCH can also support 240kHz, 480kHz, and 960kHz. Figure 9 In the example, SCS and PDCCH / PDSCH are also applied when 240kHz, 480kHz, and 960kHz are supported as SSBs. Figure 5 The structure of Case E is shown. In Figure 9 In the example, when the SCS is 240kHz, the time slot length is 0.125ms; when the SCS is 480kHz, the time slot length is 0.0625ms; and when the SCS is 960kHz, the time slot length is 0.03125ms. Figure 9In this example, the four SSBs are mapped adjacently within a time slot. Between two consecutive time slots, a pattern of not mapping SSBs for the first 8 symbols and the last 4 symbols is alternated with another pattern of not mapping SSBs for the first 4 symbols and the last 8 symbols. After repeating this pattern for eight time slots, two time slots without SSBs are placed. By repeating this pattern, 64 candidate transmission positions for SSBs are established.

[0113] Figure 10 This is a diagram illustrating example 1-3 of the SSB transmission candidate locations within a time slot. Figure 10 In the example, it is to Figure 4 The Case D structure shown is an example of a case where the number of symbols per slot is 28. For example, the SCS as SSB and the SCS as PDCCH / PDSCH can also support 240kHz, 480kHz, and 960kHz. Figure 10 In the example, when the SCS is 240kHz, the time slot length is 0.125ms; when the SCS is 480kHz, the time slot length is 0.0625ms; and when the SCS is 960kHz, the time slot length is 0.03125ms. Figure 10 In the example, within one time slot, the first 4 symbols are not mapped to an SSB, the next 4 symbols are mapped to the first SSB, the next 4 symbols are mapped to the second SSB, the next 4 symbols are not mapped to an SSB, the next 4 symbols are mapped to the third SSB, the next 4 symbols are mapped to the fourth SSB, and the next 4 symbols are not mapped to an SSB.

[0114] Figure 10 In Example 1-3-1, the following pattern is repeated to set the transmission candidate positions of 64 SSBs: after four consecutive time slots in which the transmission candidate positions of SSBs are mapped as described above, one time slot with an unmapped transmission candidate position of SSB is placed.

[0115] Figure 10 In Example 1-3-2 shown, the following pattern is repeated to set the transmission candidate positions of 64 SSBs: after 8 consecutive time slots in which the transmission candidate positions of SSBs are mapped as described above, 2 time slots in which the transmission candidate positions of SSBs are not mapped are placed.

[0116] In addition, as in Examples 1-4, it is also possible to... Figure 7 The structure shown in Case C is applied to the case where the number of symbols in each time slot is 14.

[0117] Furthermore, as in Examples 1-5, it is also possible to... Figure 7 The structure shown in Case C is applied to the case where the number of symbols in each time slot is 28.

[0118] Furthermore, as examples 1-6, the structures of any of the examples 1-1 to 1-5 above can also be applied to each SCS. For example, when the SCS is 240 kHz, examples 1-1 or 1-4 (the case where the number of symbols per slot is 14) can also be applied. Furthermore, for example, when the SCS is 480 kHz or 960 kHz, examples 1-2, 1-3, or 1-4 (the case where the number of symbols per slot is 28) can also be applied.

[0119] (Option 2)

[0120] The combination of the SCS of the SSB and the SCS of the PDCCH / PDSCH can be limited to 1) the case where the SCS of the SSB is the same as the SCS of the PDCCH / PDSCH, and / or 2) the case where the SCS of the SSB is twice the SCS of the PDCCH / PDSCH. However, this embodiment is not limited to the case where the SCS of the SSB is twice the SCS of the PDCCH / PDSCH; for example, the SCS of the SSB can also be 1 / 2, 3 / 2, or 3 times the SCS of the PDCCH / PDSCH.

[0121] Figure 11 This is a diagram illustrating Example 2-1, showing candidate locations for SSB transmission within a time slot. Figure 11 In the example, reuse Figure 4 The structure of Case D is shown. The number of symbols per time slot can also be 14. For example, it can support 120kHz, 240kHz, and 480kHz as the SCS of the PDCCH / PDSCH, and 240kHz, 480kHz, and 960kHz as the SCS of the corresponding SSB. Figure 11 In the example, when the SCS is 240kHz, the time slot length is 0.0625ms; when the SCS is 480kHz, the time slot length is 0.03125ms; and when the SCS is 960kHz, the time slot length is 0.01526ms. Figure 11 In the example, two SSBs are mapped adjacently within a time slot. Between two consecutive time slots, a pattern of not mapping SSBs for the first four symbols and the last two symbols is alternated with another pattern of not mapping SSBs for the first two symbols and the last four symbols. After repeating this pattern for eight time slots, two time slots without SSBs are placed. By repeating this pattern, 64 candidate transmission positions for SSBs are established.

[0122] Figure 12 This is a diagram illustrating Example 2-2, showing candidate locations for SSB transmission within a time slot. Figure 12 In the example, reuse Figure 5The structure of Case E is shown. The number of symbols per time slot can also be 14. For example, it can support 120kHz, 240kHz, and 480kHz as the SCS of the PDCCH / PDSCH, and 240kHz, 480kHz, and 960kHz as the SCS of the corresponding SSB. Figure 12 In the example, with an SSB SCS of 240kHz, the time slot length is 0.125ms; with an SSB SCS of 480kHz, the time slot length is 0.0625ms; and with an SSB SCS of 960kHz, the time slot length is 0.03125ms. Figure 12 In this example, the four SSBs are mapped adjacently within a time slot. Between two consecutive time slots, a pattern of not mapping SSBs for the first 8 symbols and the last 4 symbols is alternated with another pattern of not mapping SSBs for the first 4 symbols and the last 8 symbols. After repeating this pattern for eight time slots, two time slots without SSBs are placed. By repeating this pattern, 64 candidate transmission positions for SSBs are established.

[0123] Furthermore, as in Example 2-3, it is also possible to... Figure 4 The Case D structure shown applies to the case where the number of symbols in each time slot is 28.

[0124] Furthermore, as in Example 2-4, it is also possible to... Figure 5 The structure shown in Case E is applied to the case where the number of symbols in each time slot is 28.

[0125] Furthermore, as in Example 2-5, it is also possible to... Figure 7 The structure shown in Case C is applied to the case where the number of symbols in each time slot is 14.

[0126] Furthermore, as in Example 2-5, it is also possible to... Figure 7 The structure shown in Case C is applied to the case where the number of symbols in each time slot is 28.

[0127] Furthermore, as in Example 2-7, the structures of any of the examples 2-1 to 2-6 above can also be applied to each SCS. For example, when the SCS of the SSB is 240 kHz, Examples 2-1, 2-2, or 2-5 (the case where the number of symbols per slot is 14) can also be applied. Furthermore, for example, when the SCS of the SSB is 480 kHz or 960 kHz, Examples 2-3, 2-4, or 2-6 (the case where the number of symbols per slot is 28) can also be applied.

[0128] (Option 3)

[0129] Different options from Options 1 and 2 can also be applied to different SCS. For example, Option 1 (where the SCS of the SSB is the same as that of the PDCCH / PDSCH) can be applied when the SCS of the SSB is 240kHz, and Option 2 (where the SCS of the SSB is twice that of the PDCCH / PDSCH) can be applied when the SCS of the SSB is 480kHz or 960kHz.

[0130] (Regarding the unlicensed frequency bands included in the band from 52.6 GHz to 71 GHz)

[0131] In the unlicensed frequency bands included in the frequency band from 52.6 GHz to 71 GHz, terminal 10 and / or base station 20 perform the following Listen Before Talk (LBT): carrier sensing is performed before transmission begins, and transmission is performed for a predetermined duration only if it can be confirmed that the channel is not being used by other nearby systems.

[0132] In the case of using unlicensed frequency bands from 52.6 GHz to 71 GHz, the index of the SSB's transmission candidate position can be from 0 to 63, and the index of the SSB's transmission candidate position can be derived from the PBCH DMRS sequence and the PBCH payload, just as in the case of FR2 of NR version 15.

[0133] In the case of using unlicensed frequency bands from 52.6 GHz to 71 GHz, the candidate transmission positions of SSBs within a time slot can be based on... Figure 7 The structure of Case C shown is... Figure 4 The structure of Case D shown is or Figure 5 The structure of Case E shown can be the same as or different from the structure in the case of licensed frequency bands included in the frequency band from 52.6 GHz to 71 GHz.

[0134] In the case of the use of unlicensed frequency bands included in the 52.6 GHz to 71 GHz band, the mapping of time slots containing SSB transmission candidate positions may differ from the mapping of time slots containing SSB transmission candidate positions in the case of the use of licensed frequency bands included in the 52.6 GHz to 71 GHz band.

[0135] Figure 13 This is a diagram illustrating an example of a time slot mapping for transmit candidate locations including SSBs within the unlicensed frequency band spanning from 52.6 GHz to 71 GHz. (See diagram for example.) Figure 13As shown, time slots containing candidate transmission locations that include SSBs can be configured continuously. That is, time slots that do not include candidate transmission locations that do not include SSBs can also be configured. Figure 13 As shown, the number of symbols in each time slot can also be 14. In this way, by continuously configuring time slots containing SSB transmission candidate positions, it is possible to prevent the need to perform Listen Before Talk (LBT) again due to the presence of time slots that do not contain SSB transmission candidate positions.

[0136] Figure 14 This is another example of a time slot mapping for transmit candidate locations including SSBs within the unlicensed frequency band spanning from 52.6 GHz to 71 GHz. (See diagram below.) Figure 14 As shown, time slots containing candidate transmission locations that include SSBs can be configured continuously. That is, time slots that do not include candidate transmission locations that do not include SSBs can also be configured. Figure 14 As shown, the number of symbols in each time slot can also be 28.

[0137] The 3 LSBs representing the transmission candidate position index of the SSB can also be represented by the DMRS sequence of the PBCH.

[0138] The 3 MSBs can also be represented by the PBCH payload as the index of the SSB's transmission candidate location.

[0139] In NR-U, the time slot for transmitting candidate locations including the SSB is specified to be within 5ms. Additionally, a discovery burst transmission window is included as a setting for the serving cell. The length of the discovery burst transmission window can be selected from 0.5ms, 1ms, 2ms, 3ms, 4ms, and 5ms. For example, when the number of beams is small, the discovery burst transmission window length can be set shorter than 5ms, thereby reducing the load on the terminal 10. It is assumed that this discovery burst transmission window is also necessary in the unlicensed frequency bands included in the 52.6GHz to 71GHz band. For example, the maximum duration of the discovery burst transmission window that can be set in the unlicensed frequency bands included in the 52.6GHz to 71GHz band can also be shorter than 5ms. For example, when the SCS is 240kHz, the maximum duration of the discovery burst transmission window that can be set can also be 2ms. Furthermore, discovery burst transmission windows shorter than 0.5ms (e.g., 0.25ms) can also be imported into larger SCS. Additionally, the granularity of the discovery burst transmission window length can be imported to be less than 1ms (e.g., 1.5ms).

[0140] As mentioned above, multiple SSB transmission candidate positions can also be set for each SSB beam in the unlicensed frequency band from 52.6 GHz to 71 GHz.

[0141] In the case of using unlicensed frequency bands from 52.6 GHz to 71 GHz, the SSB index can be from 0 to 63, and the SSB index can be derived from the index of the SSB's transmission candidate position and the QCL parameter in the PBCH payload.

[0142] Figure 15 This is a diagram illustrating an example of deriving the SSB index from the candidate positions of the SSB and the QCL parameter. For example, when the QCL parameter is 64, the SSB index can also match the candidate positions of the SSB.

[0143] The QCL parameter can be selected from a group of candidate values ​​such as {8, 16, 32, 64}. In designs that reuse NR-U, it is preferable to set it to 2 bits (maximum 4 candidate values). Alternatively, the number of candidate values ​​for the QCL parameter can differ from other frequency bands (e.g., it can be less or more than the 4 candidate values ​​in the NR-U frequency band). For example, with fewer candidate values, the number of bits required for notification can be reduced.

[0144] QCL parameters can be sent via MIB, SIB1, or both MIB and SIB1. When sending QCL parameters via SIB1, terminal 10 can predetermine default QCL parameters (e.g., 64) before receiving SIB1.

[0145] Terminal 10 can assume that the number of SSBs actually transmitted in the discovery burst transmission window is below the QCL parameter value (it can assume that the number of SSBs is the same as the QCL parameter value, or it can assume that the number of SSBs is less than the QCL parameter value).

[0146] Terminal 10 may also assume that the SSB's SCS is the same as that of SIB1 PDCCH / PDSCH (or it may assume that the SSB's SCS is twice that of SIB1 PDCCH / PDSCH). The value of k_SSB, which is a parameter representing the deviation between the PRB of the notification SSB and the common PRB of the transmitted data, can be in the range of 0 to 11, and can also be notified through the ssb-SubcarrierOffset of the MIB.

[0147] The PBCH payload, for example, outside the MIB, can be a total of 8 bits: 4 LBs of SFN, Half-frame bit, and 3 MSBs of SSB transmit candidate position index.

[0148] The PBCH payload, for example, within the MIB, can be 6 MSBs of SFN, SSB-SubcarrierOffset (4 bits), dmrs-TypeA-Position (1 bit), pdcch-ConfigSIB1 (8 bits), cellBarred (1 bit), intraFreqReselection (1 bit), subCarrierSpacingCommon (1 bit), and spare (1 bit).

[0149] QCL parameters (e.g., 2 bits) can be sent using any of the following methods.

[0150] (Alt.1)subCarrierSpacingCommon (for cases where SCS is the same) + spare bit

[0151] (Alt.2)dmrs-TypeA-Position (Supports a DMRS type A position) + spare bit

[0152] (Alt.3) Part of pdcch-ConfigAIB1 (+spare bit)

[0153] (Alt.4) cellBarred+intraFreqReselection (only supports access scenarios other than stand-alone)

[0154] Any combination of Alt.1 to Alt.4 mentioned above.

[0155] In SIB1 / RRC, ssb-PositionsInBurst can be a 64-bit bitmap, and the number of "1"s contained in ssb-PositionsInBurst can be below the value of the QCL parameter.

[0156] (Device Structure)

[0157] Next, an example of the functional structure of the terminal 10 and base station 20 performing the processing actions described above will be explained. The terminal 10 and base station 20 have all the functions described in this embodiment. However, the terminal 10 and base station 20 may also have only some of the functions described in this embodiment. Furthermore, the terminal 10 and base station 20 may be collectively referred to as a communication device.

[0158] <Terminal>

[0159] Figure 16 This is a diagram illustrating an example of the functional structure of terminal 10. (As shown...) Figure 16 As shown, terminal 10 has a transmitting unit 110, a receiving unit 120 and a control unit 130. Figure 16 The functional structure shown is only one example. As long as the operation of this embodiment can be performed, the functional divisions and names of the functional units can be arbitrary. Alternatively, the transmitting unit 110 can be called a transmitter and the receiving unit 120 can be called a receiver.

[0160] The transmitting unit 110 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. Furthermore, the transmitting unit 110 can form one or more beams. The receiving unit 120 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the receiving unit 120 includes a measurement unit that measures the signal to be received to obtain the received power, etc.

[0161] The control unit 130 controls the terminal 10. Alternatively, the functions of the control unit 130 related to transmission can be included in the transmission unit 110, and the functions of the control unit 130 related to reception can be included in the reception unit 120.

[0162] For example, the receiving unit 120 may receive synchronization signal blocks (SSBs) transmitted from the base station 20 in the unlicensed frequency band encompassed by the frequency band from 52.6 GHz to 71 GHz, and the control unit 130 may derive candidate transmission positions for the SSBs based on the sequence of the demodulation reference signal (DMRS) of the broadcast channel (PBCH) and the payload of the PBCH. Furthermore, the control unit 130 may also assume that the index of the SSB takes any value from 0 to 63 and derive it based on the candidate transmission positions of the SSBs and the quasi-colocation (QCL) parameters in the PBCH payload.

[0163] For example, the control unit 130 may also envision continuously configuring time slots containing SSB transmission candidate positions in the unlicensed frequency bands included in the frequency band from 52.6 GHz to 71 GHz.

[0164] <Base Station 20>

[0165] Figure 17 This is a diagram illustrating an example of the functional structure of base station 20. (As shown...) Figure 17 As shown, the base station 20 has a transmitting unit 210, a receiving unit 220 and a control unit 230. Figure 17 The functional structure shown is only one example. As long as the operation of this embodiment can be performed, the functional divisions and names of the functional units can be arbitrary. Alternatively, the transmitting unit 210 can be called a transmitter and the receiving unit 220 can be called a receiver.

[0166] The transmitting unit 210 includes the function of generating a signal to be transmitted to the terminal 10 and wirelessly transmitting the signal. The receiving unit 220 includes the function of receiving various signals transmitted from the terminal 10 and obtaining, for example, higher-level information from the received signals. In addition, the receiving unit 220 includes a measurement unit for measuring the signal to be received to obtain the received power, etc.

[0167] The control unit 230 controls the base station 20. Alternatively, the functions of the control unit 230 related to transmission can be included in the transmission unit 210, and the functions of the control unit 230 related to reception can be included in the reception unit 220.

[0168] Alternatively, the control unit 230 sets the sequence of the demodulation reference signal (DMRS) of the broadcast channel (PBCH) corresponding to the candidate transmission position of the SSB in the unlicensed frequency band included in the frequency band from 52.6 GHz to 71 GHz, as well as the payload of the PBCH, and the transmission unit 210 transmits a synchronization signal block (SSB) containing the set DMRS sequence of the PBCH and the payload of the PBCH. Furthermore, the control unit 230 may also select an SSB index of any value from 0 to 63, and transmit the SSB using the transmission position and beam corresponding to the SSB index.

[0169] For example, the control unit 230 may also continuously configure time slots containing SSB transmission candidate positions in the unlicensed frequency bands included in the frequency band from 52.6 GHz to 71 GHz.

[0170] <Hardware Structure>

[0171] The block diagram used in the description of the above embodiments ( Figures 16-17 The diagram illustrates blocks organized by function. These functional blocks (structural units) are implemented through any combination of hardware and / or software. Furthermore, the means of implementation for each functional block is not particularly limited. That is, each functional block can be implemented by a device that physically and / or logically combines multiple elements, or by directly and / or indirectly (e.g., via wired and / or wireless means) connecting two or more physically and / or logically separate devices, and implementing them through these multiple devices.

[0172] Furthermore, for example, in one embodiment of the present invention, both the terminal 10 and the base station 20 can function as computers performing the processing of this embodiment. Figure 18 This diagram illustrates an example of the hardware structure of the terminal 10 and base station 20 according to this embodiment. The terminal 10 and base station 20 can each be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0173] Additionally, in the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of terminal 10 and base station 20 can be configured to include one or more of the devices shown in figures 1001 to 1006, or it can be configured to not include any of them.

[0174] The functions in terminal 10 and base station 20 are implemented by reading predetermined software (programs) into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004, and the reading and / or writing of data in memory 1002 and storage 1003.

[0175] The processor 1001 controls the computer as a whole by instructing the operating system to operate. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc.

[0176] Furthermore, the processor 1001 reads programs (program code), software modules, or data from the memory 1003 and / or communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the actions described in the above embodiments. For example, it can also be implemented using a control program stored in the memory 1002 and operated by the processor 1001. Figure 16 The terminal 10 shown includes a transmitting unit 110, a receiving unit 120, and a control unit 130. Alternatively, it can be implemented, for example, using a control program stored in memory 1002 and operated by processor 1001. Figure 17 The base station 20 shown includes a transmitting unit 210, a receiving unit 220, and a control unit 230. Although it has been described that the various processes described above are executed by a single processor 1001, the various processes described above can also be executed simultaneously or sequentially by two or more processors 1001. Alternatively, one or more processors 1001 can be installed. Furthermore, the program can also be transmitted from a network via a telecommunications line.

[0177] Memory 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. Memory 1002 can store executable programs (program code), software modules, etc., for implementing one embodiment of the present invention.

[0178] The memory 1003 is a computer-readable recording medium, which may be composed of at least one of the following: CD-ROM (Compact Disc ROM) or other optical discs, hard disks, floppy disks, magneto-optical discs (e.g., compact discs, digital multipurpose discs, Blu-ray discs, smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. The memory 1003 may also be referred to as an auxiliary storage device. The aforementioned storage medium may be, for example, a database, server, or other suitable medium that includes memory 1002 and / or memory 1003.

[0179] The communication device 1004 is hardware (transceiver) used for communication between computers via wired and / or wireless networks. For example, it may also be called a network device, network controller, network interface card (NIC), communication module, etc. For instance, the communication device 1004 can also be used to implement the transmitting unit 110 and receiving unit 120 of the terminal 10. Furthermore, the communication device 1004 can also be used to implement the transmitting unit 210 and receiving unit 220 of the base station 20.

[0180] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Alternatively, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0181] Furthermore, devices such as processor 1001 and memory 1002 are connected via bus 1007 for communicating information. Bus 1007 can be a single bus or can be composed of different buses between devices.

[0182] Furthermore, the terminal 10 and the base station 20 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array), and can also implement part or all of the functional blocks through this hardware. For example, the processor 1001 can be installed using at least one of these hardware components.

[0183] (Summary of Implementation Methods)

[0184] This specification discloses at least the following terminals and base stations.

[0185] A terminal comprising: a receiving unit that receives a synchronization signal block in an unlicensed band of a high frequency band above the frequency band of FR2, in a frequency range 1 (i.e., FR1) serving as a low frequency band and a frequency range 2 (i.e., FR2) serving as a high frequency band of a new radio (NR) system; and a control unit that determines an index of a candidate transmission position of a synchronization signal block based on a sequence of a demodulation reference signal of a broadcast channel contained in the synchronization signal block and a payload of the broadcast channel.

[0186] Based on the above structure, the terminal can determine the index of the candidate position for transmitting the synchronization signal block in the unlicensed band domain of the high-frequency band above the second frequency band of the NR system.

[0187] The control unit may also assume that the number of consecutively configured time slots containing the transmission candidate positions of the synchronization signal block is greater than 8.

[0188] Based on the above structure, it is possible to apply LBT and continuously transmit multiple synchronization signal blocks in the unlicensed band domain of the New Radio (NR) system, which is higher than the second frequency band (Frequency Range 2).

[0189] The control unit can also determine the index of the synchronization signal block based on the candidate position of the transmission of the synchronization signal block and the quasi-co-address (QCL) parameters contained in the broadcast channel.

[0190] Based on the above structure, the terminal can determine the index of the synchronization signal block by receiving the synchronization signal block.

[0191] The control unit may also assume that the duration of the discovery burst transmission window set in the unlicensed band is shorter than the duration of the discovery burst transmission window set in FR1.

[0192] Based on the above structure, the burden on the terminal when determining the candidate location for SSB transmission can be reduced.

[0193] A base station includes: a control unit that sets a sequence of decall reference signals for a broadcast channel and a payload of the broadcast channel associated with a transmission candidate position of a synchronization signal block transmitted in an unlicensed band domain of a high-frequency band above the frequency band of a low-frequency band (FR1) and a frequency range (FR2) of a new radio (NR) system; and a transmission unit that transmits the synchronization signal block containing the set sequence of decall reference signals for the broadcast channel and the payload of the broadcast channel.

[0194] According to the above structure, the base station can notify the terminal of the candidate transmission position of the synchronization signal block in the unlicensed band domain of the high-frequency band above the second frequency band of the NR system.

[0195] (Supplement to the implementation method)

[0196] The embodiments of the present invention have been described above, but the disclosed invention is not limited to these embodiments. Those skilled in the art should understand various modifications, alterations, substitutions, and replacements. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these values ​​are merely examples, and any appropriate values ​​may be used. The distinctions between items in the above description are not essential to the present invention; items described in two or more items may be combined as needed, and items described in one item may be applied to items described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. Multiple functional units may be operated by a single physical component, or a single functional unit may be operated by multiple physical components. Regarding the processing procedures described in the embodiments, the order of processing may be interchanged unless there is a contradiction. For ease of explanation, a functional block diagram has been used to illustrate the terminal 10 and base station 20, but such a device may also be implemented by hardware, software, or a combination thereof. The software operated by the processor of the terminal 10 according to the embodiments of the present invention and the software operated by the processor of the base station 20 according to the embodiments of the present invention can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server and other suitable storage media, respectively.

[0197] The notification of information is not limited to the forms / implementations described in this specification, and may also be carried out by other methods. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. In addition, RRC signaling may also be referred to as RRC messages, for example, RRC connection setup messages, RRC connection reconfiguration messages, etc.

[0198] The various forms / implementations described in this specification can also be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), systems using other suitable systems, and / or next-generation systems extended therefrom.

[0199] The processing procedures, timing, and flow of the various forms / implementations described in this specification may be rearranged in order, provided there is no contradiction. For example, the elements of each step in the methods described in this specification are indicated by an illustrated sequence, but are not limited to the specific sequence indicated.

[0200] In this specification, certain actions performed by base station 20 may sometimes also be performed by its upper node, depending on the circumstances. It should be understood that in a network consisting of one or more network nodes having base station 20, various actions performed for communication with terminal 10 can be performed by base station 20 and / or other network nodes besides base station 20 (e.g., considering MME or S-GW, but not limited to these). The above example illustrates a single network node other than base station 20, but it can also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0201] The various forms / implementations described in this specification can be used individually or in combination, and can be switched depending on the execution.

[0202] For those skilled in the art, the terminal 10 is sometimes referred to by the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terms.

[0203] For those skilled in the art, base station 20 is sometimes referred to as NB (NodeB), eNB (enhanced NodeB), base station, gNB, or some other appropriate terms.

[0204] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can be determined by indexing RBs based on a common reference point of that carrier. PRBs can be defined and numbered within a BWP.

[0205] A BWP can include a UL BWP and a DL BWP. One or more BWPs can be set for a UE within one carrier.

[0206] At least one of the configured BWPs can be active, and it is not assumed that the UE will transmit or receive predetermined signals / channels outside of an active BWP. Furthermore, the terms "cell," "carrier," etc., used in this disclosure can be replaced with "BWP."

[0207] The terms "determining" and "determining" used in this specification sometimes encompass a variety of actions. For example, "determining" or "determining" may include actions such as judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in tables, databases, or other data structures), and ascertaining. Furthermore, "determining" or "determining" may include actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory). Additionally, "determining" or "determining" may include actions such as resolving, selecting, choosing, establishing, and comparing. That is, "judgment" and "decision" can include matters that regard any action as having been "judged" or "decided".

[0208] The use of the word "according to" in this specification, unless otherwise stated, does not mean "according to only". In other words, the use of the word "according to" means both "according to only" and "according to at least" both.

[0209] Whenever used in this specification or claims, the terms "include," "including," and variations thereof, as well as the term "comprising," have the same inclusive meaning. Furthermore, the term "or" as used in this specification or claims does not refer to XOR.

[0210] Throughout this disclosure, in cases where articles are added due to translation, such as a, an, and the in English, multiple articles may be included unless explicitly stated from the context otherwise.

[0211] The present invention has been described in detail above, but it will be clear to those skilled in the art that the invention is not limited to the embodiments described in this specification. The present invention can be practiced in modified and altered ways without departing from the spirit and scope of the invention as defined by the claims. Therefore, the purpose of this specification is illustrative and it is not intended to limit the scope of the invention.

[0212] Label Explanation

[0213] 10: Terminal

[0214] 110: Sending Department

[0215] 120: Receiving Department

[0216] 130: Control Department

[0217] 20: Base station

[0218] 210: Sending Department

[0219] 220: Receiving Department

[0220] 230: Control Department

[0221] 1001: Processor

[0222] 1002: Memory

[0223] 1003 memory

[0224] 1004: Communication device

[0225] 1005: Input device

[0226] 1006: Output device

Claims

1. A terminal in a wireless communication system, the wireless communication system communicating in a first frequency band of 410 MHz to 7.125 GHz and a second frequency band of 52.6 GHz to 71 GHz, which is a frequency higher than the first frequency band, the terminal having: The receiving unit receives first setting information and second setting information related to the reception of the synchronization signal block in the second frequency band. The first setting information includes QCL parameters selected from a smaller number of quasi-co-addressable parameters (QCL parameters) than the number of candidates used in the first frequency band. The second setting information can set a longer detection burst transmission window with finer granularity, smaller maximum and minimum values ​​than the length of the detection burst transmission window in the first frequency band. The control unit sets the QCL parameters according to the first setting information and sets the length of the burst detection sending window according to the second setting information. The receiving unit is designed to receive, within the burst transmission window, a number of synchronization signal blocks that are less than or equal to the value of the QCL parameter set by the control unit.

2. A base station, which is a terminal in a wireless communication system, the wireless communication system communicating in a first frequency band of 410 MHz to 7.125 GHz and a second frequency band of 52.6 GHz to 71 GHz, which is a frequency higher than the first frequency band, the base station having: The transmitting unit transmits first and second setting information related to the reception of synchronization signal blocks in the second frequency band. The first setting information includes QCL parameters selected from a smaller number of quasi-co-addressable parameters (QCL parameters) than the number of candidates used in the first frequency band. The second setting information can set a longer detection burst transmission window with finer granularity, smaller maximum and minimum values ​​than the length of the detection burst transmission window in the first frequency band. The control unit sets the QCL parameters according to the first setting information and sets the length of the burst detection sending window according to the second setting information. Within the detected burst transmission window, the transmitting unit transmits a number of synchronization signal blocks that are less than or equal to the value of the QCL parameter set by the control unit.

3. A communication system that communicates in a first frequency band of 410 MHz to 7.125 GHz and a second frequency band of 52.6 GHz to 71 GHz, which is a frequency higher than said first frequency band, comprising a base station and a terminal, wherein, The base station has: The transmitting unit sends to the terminal first setting information and second setting information related to the reception of the synchronization signal block in the second frequency band. The first setting information includes QCL parameters selected from a number of quasi-co-address parameters (QCL parameters) that is fewer than the number of candidates used in the first frequency band. The second setting information can set the length of the discovery burst transmission window to be smaller in granularity than the length of the discovery burst transmission window in the first frequency band, with smaller maximum and minimum values. as well as The control unit sets the QCL parameters according to the first setting information and sets the length of the burst detection sending window according to the second setting information. Within the detected burst transmission window, the transmitting unit sends to the terminal a number of synchronization signal blocks that are less than or equal to the value of the QCL parameter set by the control unit. The terminal has: The receiving unit receives from the base station the first setting information and the second setting information related to the reception of the synchronization signal block in the second frequency band; as well as The control unit sets the QCL parameters according to the first setting information and sets the length of the burst detection sending window according to the second setting information. The receiving unit is designed to receive, within the burst transmission window, a number of synchronization signal blocks that are less than or equal to the value of the QCL parameter set by the control unit.

4. A communication method performed by a terminal in a wireless communication system, the wireless communication system communicating in a first frequency band of 410 MHz to 7.125 GHz and a second frequency band of 52.6 GHz to 71 GHz, which is a frequency higher than the first frequency band, the communication method comprising: The receiving step involves receiving first and second setting information related to the reception of a synchronization signal block in the second frequency band. The first setting information includes QCL parameters selected from a smaller number of quasi-co-addressable parameters (QCL parameters) than the number of candidates used in the first frequency band. The second setting information allows setting a longer, finer-grained discovery burst transmission window with smaller maximum and minimum values ​​compared to the length of the discovery burst transmission window in the first frequency band. The control steps include setting the QCL parameters according to the first setting information and setting the length of the burst transmission window according to the second setting information. The receiving step envisions receiving, within the burst transmission window, a number of synchronization signal blocks less than or equal to the value of the QCL parameter set in the control step.

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