Terminal and sending method

Abstract

The terminal comprises: a receiving unit, which receives an index specifying setting information for sending a random access preamble code; and a control unit, which, when the receiving unit receives additional information specifying resources in a time domain for sending the random access preamble code, replaces the resources in the time domain for sending the random access preamble code contained in the setting information specified by the index with resources in the time domain specified by the additional information for setting.

Description

Technical Field

[0001] The present invention relates to a terminal and a sending method in a wireless communication system. Background Art

[0002] In 3GPP (3rd Generation Partnership Project), research on wireless communication methods called NR (New Radio) or 5G is being conducted to achieve further increases in system capacity, further increases in data transmission speed, and further reductions in latency in wireless intervals. In NR, various wireless technologies are being studied to meet the requirements of achieving a throughput of more than 10 Gbps while keeping the latency in the wireless interval to less than 1 ms.

[0003] The dl-UL-TransmissionPeriodicity of TDD-UL-DL-pattern was 0.5ms, 0.625ms, 1ms, 1.25ms, 2ms, 2.5ms, 5ms, and 10ms when the version 15 specification was first developed. In contrast, in order to synchronize LTE TDD configurations 1, 2, and 4 with the DL / UL switching timing, 3ms and 4ms were added as dl-UL-TransmissionPeriodicity after the September 2018 specification.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS38.211 V15.6.0 (2019-06)

[0007] Non-patent document 2: 3GPP TS36.211 V15.6.0 (2019-06)

[0008] Non-patent document 3: 3GPP TSG-RAN WG2 Meeting #103, R2-1813303, Gothenburg, Sweden, 20-24 August 2018

[0009] Non-patent document 4: 3GPP TSG-RAN WG2 Meeting NR Adhoc 1807, R2-1810963, Montreal, Canada, 2nd-6th July 2018

[0010] Non-patent document 5: 3GPP TSG-RAN WG2#103, R2-1813279, Gothenburg, Sweden, 20-24 August, 2018 Summary of the invention

[0011] Problems to be solved by the invention

[0012] It is envisioned that spectrum sharing (spectrum sharing) is performed in the LTE system and the NR system, that is, the use of a common frequency band. In this way, when the timing of the wireless frames is made consistent in the LTE TDD system and the NR TDD system, and a common frequency band is used for communication, it is necessary to suppress the interference caused by one communication system to the other communication system. For example, when the LTE TDD subframe is allocated to the downlink at a certain timing, and the NR TDD subframe is allocated to the uplink at the same timing, the transmission of the NR uplink may cause significant interference to the reception of the LTE downlink.

[0013] A method is required for suppressing interference to other systems when a terminal sends a random access preamble.

[0014] Means for solving problems

[0015] According to one embodiment of the present invention, a terminal is provided, comprising: a receiving unit, which receives an index specifying setting information for sending a random access preamble code; and a control unit, which, when the receiving unit receives additional information specifying resources in a time domain for sending the random access preamble code, replaces the resources in the time domain for sending the random access preamble code contained in the setting information specified by the index with resources in the time domain specified by the additional information for setting.

[0016] Effects of the Invention

[0017] According to an embodiment of the present invention, a method for suppressing interference caused to other systems when a terminal sends a random access preamble is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the communication system in this embodiment.

[0019] Figure 2 is a diagram showing an example of a random access procedure.

[0020] Figure 3 This is a diagram showing an example of a table of random access configuration.

[0021] Figure 4This is a diagram showing an example of an uplink-downlink configuration corresponding to the TDD method of LTE.

[0022] Figure 5 This is a diagram showing an example of Proposal 1.

[0023] Figure 6 is a diagram showing an example of the RACH-ConfigGeneric information element.

[0024] Figure 7 This is a diagram showing a modified example of the specification corresponding to Proposal 1.

[0025] Figure 8 This is a diagram showing an example of Proposal 2.

[0026] Fig. 9 is a diagram showing an example of the RACH-ConfigGeneric information element.

[0027] Fig.10 This is a diagram showing an example of changes to the specifications corresponding to Proposal 2.

[0028] Fig.11 is a diagram showing an example of the RACH-ConfigGeneric information element.

[0029] Fig.12 This is a diagram showing an example of changes to the specifications corresponding to Proposal 3.

[0030] Fig.13 is a diagram showing an example of the RACH-ConfigGeneric information element.

[0031] Fig.14 This is a diagram showing an example of changes to the specifications corresponding to Proposal 4.

[0032] Fig.15 This is a diagram showing an example of Proposal 5.

[0033] Fig.16 is a diagram showing an example of the RACH-ConfigGeneric information element.

[0034] Fig.17 This is a diagram showing an example of changes to the specifications corresponding to Proposal 5.

[0035] Fig.18 This is a diagram showing an example of Proposal 6.

[0036] Fig.19 is a diagram showing an example of the RACH-ConfigGeneric information element.

[0037] Fig. 20 This is a diagram showing an example of changes to the specifications corresponding to Proposal 6.

[0038] Fig.21 This is a diagram showing an example of a functional structure of a terminal.

[0039] Fig. 22 This is a diagram showing an example of a functional structure of a base station.

[0040] Fig.23 This is a diagram showing an example of the hardware configuration of a terminal and a base station. DETAILED DESCRIPTION

[0041] Hereinafter, an embodiment of the present invention (this embodiment) will be described with reference to the drawings. In addition, the embodiment described below is just an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0042] It is assumed that the wireless communication system in the following embodiments is basically based on NR, but this is an example, and the wireless communication system in this embodiment may be based on a wireless communication system other than NR (for example, LTE) in part or all thereof.

[0043] (System overall structure)

[0044] Figure 1 : is a block diagram showing a wireless communication system according to the present embodiment. Figure 1 As shown in FIG. 1 , the wireless communication system according to the present embodiment includes a terminal (user device) 10 and a base station 20. Figure 1 In the figure, one terminal 10 and one base station 20 are shown respectively, but this is an example and there may be plural terminals and base stations respectively.

[0045] The terminal 10 is a communication device with a wireless communication function such as a smartphone, mobile phone, tablet computer, wearable terminal, M2M (machine-to-machine) communication module, etc., which is wirelessly connected to the base station 20 and uses various communication services provided by the wireless communication system. The base station 20 is a communication device that provides one or more cells and wirelessly communicates with the terminal 10. Both the terminal 10 and the base station 20 can perform beamforming to send and receive signals. In addition, the terminal 10 can also be called UE and the base station 20 can be called eNB.

[0046] In the present embodiment, the duplex method may be a TDD (Time Division Duplex) method or a FDD (Frequency Division Duplex) method.

[0047] The technology involved in this embodiment is related to the random access procedure, etc., so these operation examples in the wireless communication system are first described.

[0048] (Random access process, etc.)

[0049] refer to Figure 2 , an example of the random access process in this embodiment is described. Figure 2 The process shown is called initial access.

[0050] The base station 20 transmits a synchronization signal and a physical broadcast channel (SS / PBCH) block (also referred to as an SSB) at a specific period, and the terminal 10 receives the SS / PBCH block (S11). The SS / PBCH block includes a synchronization signal and part of the system information required for initial access (system frame number (SFN), information required for reading the remaining system information, etc.). In addition, the terminal 10 receives a system information block 1 (System Information Block 1 (SIB1)) from the base station 20 (S12).

[0051] Next, the terminal 10 transmits the message 1 (Message 1 (Msg 1 (=RA preamble (RA preamble))))) (S13).

[0052] When the base station 20 detects the RA preamble code, it sends a message 2 (Message 2 (Msg2 (=RA response (RA response))))) to the terminal 10 as its response (S14). In addition, in the following description, unless otherwise specified, it is assumed that "Msg2" includes the physical downlink control channel (Physical Downlink Control Channel (PDCCH)) used in the scheduling and the physical downlink shared channel (Physical Downlink Shared Channel (PSDCH)) that carries entity information.

[0053] The terminal 10 that has received the RA response transmits a message 3 (Message 3 (Msg 3)) including specific information to the base station 20 (step S15). The message 3 is, for example, an RRC connection request.

[0054] The base station 20 that receives the message 3 sends a message 4 (Message 4) (Msg 4, for example: RRC connection setup) to the terminal 10 (S16). If the terminal 10 confirms that the above-mentioned specific information is included in the message 4, it recognizes that the message 4 is the message 4 sent to itself corresponding to the above-mentioned message 3, completes the random access process, and establishes the RRC connection (S17). In addition, Figure 2 Although an example is shown in which Message 3 and Message 4 are transmitted, this is only an example. The technology involved in this embodiment can also be applied to the random access procedure in which Message 3 and Message 4 are not transmitted.

[0055] Regarding the transmission opportunity of the random access preamble, Non-Patent Document 1 stipulates that the random access preamble can be transmitted only in the time resource specified by the parameter prach-ConfigIndex of the higher layer.

[0056] Figure 3 This is a diagram showing an example of a table of random access configurations specified by prach-ConfigIndex in the case of frequency range (FR) 1 and TDD.

[0057] For example, it is assumed that the value 0 is notified from the base station 20 to the terminal 10 as the PRACH configuration index (PRACH Configuration Index). At this time, the terminal 10 that receives the value 0 as the PRACH configuration index can detect the following: the preamble format is 0, the period of the random access preamble transmission opportunity is 160ms, and the random access preamble transmission opportunity is subframe 9 among subframes 0 to 9 included in the 10ms radio frame (radio frame).

[0058] Figure 3 The n shown SFN mod x=y specifies the number of the wireless frame containing the opportunity to send the random access preamble. For example, when x=16 and y=1, the opportunity to send the random access preamble becomes a wireless frame with a system frame number (SFN) = 1, 17, 33, etc. The time length (duration) of a wireless frame is 10ms, so the period of the opportunity to send the random access preamble when x=16 and y=1 becomes 160ms. Figure 3In the example, the period of sending the random access preamble code when the PRACH setting index value is 1 is 80ms, the period of sending the random access preamble code when the PRACH setting index value is 2 is 40ms, and the period of sending the random access preamble code when the PRACH setting index value is any one of 3 to 6 is 20ms.

[0059] Figure 4 This is a diagram showing an example of an uplink-downlink configuration corresponding to the time division duplex (TDD) method of LTE. Figure 4 In the example, a 10 ms wireless frame includes 10 1 ms subframes, each of which is a downlink subframe (denoted by D), an uplink subframe (denoted by U), or a special subframe (denoted by S).

[0060] (About the topic)

[0061] When the 3GPP version 15 specification was first developed, the dl-UL-TransmissionPeriodicity of the TDD-UL-DL-pattern was 0.5ms, 0.625ms, 1ms, 1.25ms, 2ms, 2.5ms, 5ms, and 10ms.

[0062] In contrast, in order to synchronize LTE TDD settings 1, 2, and 4 with the DL / UL switching timing, 3ms and 4ms were added as dl-UL-Transmission Periodicity after the September 2018 specification. In this way, it is envisioned that the timing of the radio frame of the LTE TDD system is consistent with the timing of the radio frame of the NR TDD system. Furthermore, it is envisioned that spectrum sharing (spectrum sharing) is performed between the LTE system and the NR system, that is, the use of a common frequency band.

[0063] In this way, when the timing of the wireless frames is made consistent in the LTE TDD system and the NR TDD system, and a common frequency band is used for communication, it is necessary to suppress the interference caused by one party's communication system to the other party's communication system. For example, when the LTE TDD subframe is allocated to the downlink at a certain timing, and the NR TDD subframe is allocated to the uplink at the same timing, the transmission of the NR uplink may cause greater interference to the reception of the LTE downlink. Therefore, when the LTE TDD method and the NR TDD method are used in a common frequency band, it is envisaged that the LTE TDD subframe and the NR TDD subframe with the same timing as the LTE TDD subframe are allocated to the uplink together, or allocated to the downlink together.

[0064] Here, it is assumed that the timing of the radio frame of the LTE TDD system is made consistent with the timing of the radio frame of the NR TDD system, and the spectrum is shared between the LTE system and the NR system. Figure 4 The uplink-downlink configuration shown is assumed to be set to 2. At this time, in the radio frame of the LTE system, subframes allocated to the uplink are subframe 2 and subframe 7.

[0065] Therefore, when the terminal 10 sends a random access preamble in the NR system, it is assumed that the terminal 10 sends the random access preamble in subframe 2 and / or subframe 7.

[0066] However, according to Figure 3 In the table shown, when the PRACH configuration index is 0 to 6, the subframes for transmitting the random access preamble are 9 and 4, and it is not assumed that subframe 2 and subframe 7 are designated.

[0067] There is a need for a method that enables a terminal 10 of an NR system to send a random access preamble code at a timing of a subframe specified in an uplink in an LTE system.

[0068] (Proposal 1)

[0069] Figure 5 is a diagram showing an example of Proposal 1. In the method of Proposal 1, directly using Figure 3 The table for specifying random access settings shown in Figure 3 The table itself does not change.) For example, the base station 20 notifies the terminal 10 Figure 3 The PRACH configuration indexes in the table shown are any of 0 to 6. Furthermore, the base station 20 notifies the terminal 10 of the subframe number of the transmission opportunity of the random access preamble through RRC signaling. The terminal 10 does not apply Figure 3 The subframe number specified in the table shown in the figure is used instead of the subframe number received from the base station 20 as the transmission opportunity of the random access preamble.

[0070] For example, the base station 20 transmits a value of 0 as a PRACH setting index to the terminal 10. Furthermore, the base station 20 notifies, for example, 7 as a subframe number for specifying the transmission opportunity of the random access preamble. The terminal 10 responds to the reception of a value of 0 as the PRACH setting index and a subframe number for specifying the transmission opportunity of the random access preamble, and sets subframe 7 as a subframe that can transmit the random access preamble. At this time, the radio frames that can transmit the random access preamble are SFN=1, 17, 33, ... That is, the terminal 10 sets 160 ms as the period of the transmission opportunity of the random access preamble.

[0071] Figure 6 RACH-ConfigGeneric is a diagram showing an example of the RACH-ConfigGeneric information element that can be used when the base station 20 notifies the terminal 10 of the number of the subframe that specifies the opportunity to transmit the random access preamble. Figure 6 The value of the prach-Subframe field included in the RACH-ConfigGeneric information element shown specifies the number of the subframe in which the random access preamble can be transmitted. Figure 7 This is a diagram showing a modified example of the specification corresponding to Proposal 1.

[0072] (Proposal 2)

[0073] Figure 8 is a diagram showing an example of Proposal 2. In the method of Proposal 2, directly using Figure 3 The table for specifying random access settings shown in Figure 3 The table itself does not change.) For example, the base station 20 notifies the terminal 10 Figure 3 The PRACH configuration indexes 0 to 6 in the table shown in FIG. 1 are selected. Furthermore, the base station 20 notifies the terminal 10 of the PRACH configuration indexes 0 to 6 in the table shown in FIG. Figure 3 The terminal 10 will determine the offset between the number of the subframe specified in the table and the number of the subframe actually set to be able to send the random access preamble. Figure 3 A number obtained by applying modulo 10 operation to a value obtained by adding an offset value to a subframe number specified in the table shown is set as the number of a subframe in which a random access preamble can be transmitted.

[0074] For example, the base station 20 sends a value of 0 to the terminal 10 as the PRACH configuration index. Furthermore, the base station 20 notifies the terminal 10 of 8 through RRC signaling as Figure 3The terminal 10 receives the value 0 as the PRACH setting index and receives the value 8 as the offset value between the subframe number specified in the table and the subframe number actually set to be able to send the random access preamble. Figure 3 The terminal 10 responds to the offset value between the subframe number specified in the table and the subframe number actually set to be capable of sending the random access preamble, calculates (9+8)mod10=7, and sets subframe 7 as the subframe capable of sending the random access preamble. At this time, the wireless frames capable of sending the random access preamble become SFN=1, 17, 33... That is, the terminal 10 sets 160ms as the period of the random access preamble transmission opportunity.

[0075] Fig. 9 This means that the base station 20 is notifying the terminal 10 that Figure 3 Figure 1 shows an example of a RACH-ConfigGeneric information element that can be used when the number of the subframe specified in the table is offset from the number of the subframe that is actually set to be able to send the random access preamble. Fig. 9 The values ​​of the prach-Subframe fields contained in the RACH-ConfigGeneric information element shown are specified in Figure 3 The offset between the subframe number specified in the table and the subframe number actually set to be able to send the random access preamble code. Fig.10 This is a diagram showing an example of changes to the specifications corresponding to Proposal 2.

[0076] (Proposal 3)

[0077] The base station 20 wants to set the terminal 10 Figure 3 In the case of any of the PRACH configuration indexes 0 to 6 shown in FIG. 1 , it is assumed that the subframe number is set to 2 or 7 instead of 4 or 9, as Figure 3 The base station 20 may also notify the terminal 10 of the PRACH configuration IndexAlt by RRC signaling, based on the fact that any value from 0 to 6 is set as the PRACH configuration IndexAlt. On this basis, the base station 20 may also notify the terminal 10 of the subframe number 2 or 7 by RRC signaling. In this case, the subframe number 2 or 7 may be unchanged. Figure 3 The table itself is Figure 3The random access resource setting corresponds to any one of the PRACH setting indexes 0 to 6 shown, and only the number of the subframe that can send the random access preamble is set to 2 or 7 instead of 4 or 9. In this way, when the PRACH setting IndexAlt as a new parameter is defined, the legacy terminal does not read the PRACH setting IndexAlt but only reads the PRACH setting index, so that different PRACH setting indexes can be applied to the legacy terminal and the terminal 10 corresponding to the method of Proposal 3, and the legacy terminal and the terminal 10 corresponding to the method of Proposal 3 can coexist.

[0078] Fig.11 2 is a diagram showing an example of a RACH-ConfigGeneric information element that can be used when the base station 20 notifies the terminal 10 of the PRACH configuration IndexAlt and the subframe number. Fig.11 The value of the prach-ConfigurationIndexAlt field contained in the RACH-ConfigGeneric information element shown is set to any value from 0 to 6, and the subframe number ( Fig.11 The value of the prach-Subframe field of the terminal 10 is set to 2 or 7, thereby enabling the terminal 10 to communicate with the terminal 10. Figure 3 The terminal 10 detects the presence of the prach-ConfigurationIndexAlt field in the PRACH-ConfigGeneric information element, obtains any one of the values ​​0 to 6 set in the prach-ConfigurationIndexAlt field, and obtains 2 or 7 as the subframe number. As a result, the terminal 10 can set the random access resource corresponding to the PRACH configuration index corresponding to the value set in the prach-ConfigurationIndexAlt field, and set 2 or 7 as the number of the subframe that can send the random access preamble. Fig.12 This is a diagram showing an example of changes to the specifications corresponding to Proposal 3.

[0079] (Proposal 4)

[0080] The base station 20 wants to set the terminal 10 Figure 3In the case of any of the PRACH configuration indexes 0 to 6 shown in FIG. 1 , it is assumed that the subframe number is set to 2 or 7 instead of 4 or 9, as Figure 3 The base station 20 may also notify the terminal 10 of the PRACH setting IndexAlt by RRC signaling, based on the fact that any value from 0 to 6 is set as the PRACH setting IndexAlt. Figure 3 The offset between the subframe number specified in the table and the subframe number in which the random access preamble can actually be sent. In this case, it is possible to not change Figure 3 The table itself, and Figure 3 The random access resource setting corresponds to any one of the PRACH setting indexes 0 to 6 shown, and only the number of the subframe that can send the random access preamble is set to 2 or 7 instead of 4 or 9. In this way, when the PRACH setting IndexAlt as a new parameter is defined, the legacy terminal does not read the PRACH setting IndexAlt but only reads the PRACH setting index, so that different PRACH setting indexes can be applied to the legacy terminal and the terminal 10 corresponding to the method of Proposal 3, and the legacy terminal and the terminal 10 corresponding to the method of Proposal 3 can coexist.

[0081] Fig.13 The figure shows an example of the RACH-ConfigGeneric information element that can be used when the base station 20 notifies the terminal 10 of the PRACH configuration IndexAlt and the subframe number. Fig.11 The value of the prach-ConfigurationIndexAlt field contained in the RACH-ConfigGeneric information element shown is set to any value from 0 to 6, and the offset value of the subframe number ( Fig.13 The value of the prach-SubframeOffset field of the terminal 10 is set to 3 or 8, so that the terminal 10 can communicate with the terminal 10. Figure 3The PRACH configuration index Index0 to 6 shown in the figure corresponds to the random access configuration, and only the subframe number is set to 2 or 7 instead of 4 or 9. If the terminal 10 receives the PRACH-ConfigGeneric information element, it determines whether the prach-ConfigurationIndexAlt field is included. The terminal 10 responds to the detection that the prach-ConfigurationIndexAlt field is included in the PRACH-ConfigGeneric information element, obtains any value of 0 to 6 set in the prach-ConfigurationIndexAlt field, and responds to the reception of 3 or 8 as the offset value of the subframe number, calculates (3+9) mod10=2 or (8+9) mod10=7 (or (3+4) mod10=7 or (8+4) mod10=2), and sets subframe 2 or 7 as the subframe that can send the random access preamble. Fig.14 This is a diagram showing an example of changes to the specifications corresponding to Proposal 4.

[0082] (Proposal 5)

[0083] It can also be expanded Figure 3 The table of random access configuration for FR1 and TDD shown in FIG. Figure 3 Any one of the PRACH configuration indices 0 to 6 shown corresponds to the PRACH configuration index having only a subframe number of 2 or 7 instead of 4 or 9. Fig.15 is a diagram showing an example of Proposal 5. Fig.15 In the table shown, 256 to 271 are added as PRACH setting indexes, and it is set to be possible to specify a random access setting corresponding to any one of PRACH setting indexes 0 to 6 and only the subframe number becomes 2 or 7 instead of 4 or 9 by any one of indexes 256 to 269. In addition, it can also be extended so that the base station 20 can notify the PRACH setting index of a value greater than 256 in the RACH-ConfigGeneric information element that can be used when notifying the terminal 10 of the PRACH setting index.

[0084] Fig.16 RACH-ConfigGeneric is a diagram showing an example of the RACH-ConfigGeneric information element that can be used when the base station 20 notifies the terminal 10 of the PRACH configuration index. Fig.16 The prach-ConfigurationIndex-v16xy field included in the RACH-ConfigGeneric information element shown can notify a PRACH configuration index having a value of 256 or more. Fig.17This is a diagram showing an example of changes to the specifications corresponding to Proposal 5.

[0085] (Proposal 6)

[0086] Fig.18 is a diagram showing an example of Proposal 6. In the method of Proposal 6, the new regulations and Figure 3 The table for specifying random access configuration shown in FIG. 1 corresponds to a table that can specify subframe number 2 or 7 as a subframe in which a random access preamble can be transmitted. Fig.18 The table shown specifies the Figure 3 The PRACH configuration index shown corresponds to and can specify the index 0 to 6 of subframe number 2, and Figure 3 The PRACH configuration index shown corresponds to and can specify indexes 7 to 13 of subframe number 7.

[0087] Fig.19 RACH-ConfigGeneric is a diagram showing an example of the RACH-ConfigGeneric information element that can be used when the base station 20 notifies the terminal 10 of the PRACH configuration index. Fig.19 The prach-ConfigurationIndexAlt field contained in the RACH-ConfigGeneric information element shown in the figure can notify Figure 3 The PRACH configuration index shown corresponds to and can specify the PRACH configuration index of subframe number 2 or 7. Fig. 20 This is a diagram showing an example of changes to the specifications corresponding to Proposal 6.

[0088] As described in the above embodiment, the time domain resources of the NR specified by the PRACH setting index, that is, the time domain resources of the NR set to be able to send a random access preamble code, can also be set to be valid in the case of unpaired spectrum (TDD) only when the timing is consistent with the resources sent by the UL of LTE.

[0089] It is also possible to define UE capabilities corresponding to the extensions of Proposals 1 to 6. For a terminal 10 in connected mode, such as a terminal 10 supporting EN-DC, a RACH-ConfigGeneric based on any one of Proposals 1 to 6 may be configured for the terminal 10 through RRC dedicated signaling based on the UE capabilities.

[0090] According to the above-mentioned embodiment, when the timing of TDD UL DL configuration is matched between the TDD system of LTE and the TDD system of NR, the NR system can cope with any RACH period of 20ms, 40ms, 80ms, and 160ms.

[0091] (Device Structure)

[0092] Next, a functional configuration example of the terminal 10 and the base station 20 that perform the processing operations described so far is described. The terminal 10 and the base station 20 have all the functions described in this embodiment. However, the terminal 10 and the base station 20 may also have only a part of all the functions described in this embodiment. In addition, the terminal 10 and the base station 20 may also be collectively referred to as a communication device.

[0093] <User Device>

[0094] Fig.21 1 is a diagram showing an example of the functional structure of the terminal 10. Fig.21 As shown, the terminal 10 has a sending unit 210 , a receiving unit 220 , and a control unit 130 . Fig.21 The functional structure shown is just an example. As long as the operation of this embodiment can be performed, the functional division and the name of the functional unit can be any name. In addition, the transmission unit 110 can also be called a transmitter, and the receiving unit 120 can be called a receiver.

[0095] The transmission unit 110 creates a transmission according to the transmission data and wirelessly transmits the transmission signal. In addition, the transmission unit 110 can form one or more beams. The receiving unit 120 wirelessly receives various signals and obtains a signal of a higher layer from the received signal of the physical layer. In addition, the receiving unit 120 includes a measurement unit that measures the received signal and obtains the received power, etc.

[0096] The control unit 130 controls the terminal 10. In addition, the function of the control unit 130 related to transmission may be included in the transmission unit 110, and the function of the control unit 130 related to reception may be included in the reception unit 120.

[0097] For example, the receiving unit 120 of the terminal 10 receives a signal including a PRACH setting index transmitted from the base station 20. The control unit 130 of the terminal 10 sets a preamble format, a period of transmission opportunities of a random access preamble, and a number of subframes including transmission opportunities of a random access preamble, corresponding to the value of the PRACH setting index received by the receiving unit 120. The transmitting unit 110 of the terminal 10 transmits a random access preamble to the base station 20 according to the random access setting set by the control unit 130.

[0098] In addition, for example, the receiving unit 120 of the terminal 10 receives a signal including a PRACH setting index transmitted from the base station 20. In addition, the receiving unit 120 of the terminal 10 receives an additional signal including the number of a subframe specifying a transmission opportunity of a random access preamble. The control unit 130 of the terminal 10 sets the preamble format corresponding to the value of the PRACH setting index received by the receiving unit 120 and the period of the transmission opportunity of the random access preamble, but sets the number of the subframe specified by the additional signal received by the receiving unit 120 for the transmission opportunity of the random access preamble.

[0099] In addition, for example, the receiving unit 120 of the terminal 10 receives a signal including a PRACH configuration index transmitted from the base station 20. In addition, the receiving unit 120 of the terminal 10 receives an additional signal including an offset between the number of the subframe specified by the PRACH configuration index received by the receiving unit 120 and the number of the subframe actually set to be able to transmit the random access preamble. The control unit 130 of the terminal 10 sets the preamble format corresponding to the value of the PRACH configuration index received by the receiving unit 120 and the period of the random access preamble transmission opportunity, but sets the number of the subframe specified by the additional signal received by the receiving unit 120 for the random access preamble transmission opportunity.

[0100] In addition, for example, the receiving unit 120 of the terminal 10 receives a signal including an alternative PRACH configuration index transmitted from the base station 20. In addition, the receiving unit 120 of the terminal 10 receives an additional signal including the number of a subframe specifying a transmission opportunity of a random access preamble. The control unit 130 of the terminal 10 sets the preamble format specified by the normal PRACH configuration index corresponding to the value of the alternative PRACH configuration index received by the receiving unit 120 and the period of the transmission opportunity of the random access preamble, but sets the number of the subframe specified by the additional signal received by the receiving unit 120 for the transmission opportunity of the random access preamble.

[0101] In addition, for example, the receiving unit 120 of the terminal 10 receives a signal including an alternative PRACH configuration index transmitted from the base station 20. In addition, the receiving unit 120 of the terminal 10 receives an additional signal including an offset between the number of a subframe specified by a normal PRACH configuration index corresponding to the value of the alternative PRACH configuration index received by the receiving unit 120 and the number of a subframe actually set to be able to transmit a random access preamble. The control unit 130 of the terminal 10 sets the preamble format specified by the normal PRACH configuration index corresponding to the value of the alternative PRACH configuration index received by the receiving unit 120 and the period of the random access preamble transmission opportunity, but sets the number of the subframe specified by the additional signal received by the receiving unit 120 for the random access preamble transmission opportunity.

[0102] In addition, for example, the receiving unit 120 of the terminal 10 receives a signal including an added PRACH configuration index transmitted from the base station 20. In this case, the control unit 130 of the terminal 10 sets the preamble format corresponding to the value of the added PRACH configuration index received by the receiving unit 120, the period of the transmission opportunity of the random access preamble, and the number of the subframe as the transmission opportunity of the random access preamble.

[0103] In addition, for example, a first table including a first set of normal PRACH setting indexes and a second table including a second set of PRACH setting indexes may be specified, the second set of PRACH setting indexes corresponding to the first set of normal PRACH setting indexes, but specifying a subframe number other than that specified by the first set of normal PRACH setting indexes as the number of the subframe in which the random access preamble can be transmitted. At this time, for example, the receiving unit 120 of the terminal 10 receives a signal including any one of the PRACH setting indexes in the second set transmitted from the base station 20. The control unit of the terminal 10 sets the preamble format corresponding to the value of any one of the PRACH setting indexes in the second set received by the receiving unit 120, the period of the transmission opportunity of the random access preamble, and the number of the subframe as the transmission opportunity of the random access preamble.

[0104] <Base Station 20>

[0105] Fig. 22 2 is a diagram showing an example of the functional structure of the base station 20. Fig. 22 As shown, the base station 20 includes a sending unit 210 , a receiving unit 220 and a control unit 230 . Fig. 22The functional structure shown is just an example. As long as the operations involved in this embodiment can be performed, the functional division and the names of the functional units can also be arbitrary. In addition, the sending unit 210 can also be called a transmitter, and the receiving unit 220 can be called a receiver.

[0106] The transmission unit 210 includes a function of generating a signal to be transmitted to the terminal 10 side and transmitting the signal wirelessly. In addition, the transmission unit 210 forms one or more beams. The reception unit 220 includes a function of receiving various signals transmitted from the terminal 10 and obtaining information such as a higher layer from the received signal. In addition, the reception unit 220 includes a measurement unit that measures the received signal and obtains the received power and the like.

[0107] The control unit 230 controls the base station 20. Alternatively, the function of the control unit 230 related to transmission may be included in the transmission unit 210, and the function of the control unit 230 related to reception may be included in the reception unit 220.

[0108] For example, the control unit 230 of the base station 20 selects a PRACH setting index for specifying a random access setting set for the terminal 10. The transmitting unit 210 of the base station 20 transmits a signal including the PRACH setting index selected by the control unit 230 to the terminal 10. Additionally, the control unit 230 of the base station 20 generates information for specifying a changed subframe number when changing a subframe number of a transmission opportunity of a random access preamble set by the PRACH setting index sent to the terminal 10, and the transmitting unit 210 transmits a signal including the information for specifying the changed subframe number to the terminal 10.

[0109] <Hardware Structure>

[0110] The block diagram used in the description of the above embodiment ( Figure 21-22) shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by using one device that is physically or logically combined, or it can be implemented by connecting two or more devices that are physically or logically separated directly or indirectly (for example, using wires, wirelessly, etc.) and using the multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software. Among the functions, there are judgment, determination, judgment, calculation, calculation, processing, export, investigation, retrieval, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notification, communication, forwarding, configuration (configuring), reconstruction, allocation (allocating, mapping), assignment, etc., but not limited to this. For example, a functional block (structural unit) that performs a transmission function may also be referred to as a transmission unit or a transmitter, etc. As described above, the implementation method is not particularly limited.

[0111] Furthermore, for example, the terminal 10 and the base station 20 according to one embodiment of the present invention may both function as computers that perform the processing according to the present embodiment. Fig.23 1 is a diagram showing an example of the hardware configuration of the terminal 10 and the base station 20 involved in this embodiment. The above-mentioned terminal 10 and the base station 20 can also be physically 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, a bus 1007, etc.

[0112] In the following description, the expression "device" can be replaced by circuit, equipment, unit, etc. The hardware configuration of the terminal 10 and the base station 20 may include one or more of the devices shown in Figures 1001 to 1006, or may exclude some of the devices.

[0113] Each function in the terminal 10 and the base station 20 is achieved, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs calculations to control communication via the communication device 1004, or control at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0114] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, registers, and the like.

[0115] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes according to them. As a program, a program that enables a computer to perform at least a part of the operations described in the above-mentioned embodiment is used. For example, the control unit 130 of the terminal 10 can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks. It is explained that the above-mentioned various processes are performed by one processor 1001, but it can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunications line.

[0116] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0117] The storage 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, an optical magnetic disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may also be, for example, a database, a server, or other appropriate medium that includes at least one of the memory 1002 and the storage 1003.

[0118] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may also be configured to implement at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex), including a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc.

[0119] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0120] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or different buses between the devices.

[0121] In addition, the terminal 10 and the base station 20 may also be respectively composed of hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and may also implement a part or all of each functional block through the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

[0122] (Summary of Implementation Methods)

[0123] In this specification, at least the following terminal and communication method are disclosed.

[0124] The terminal includes: a receiving unit that receives an index that specifies setting information for sending a random access preamble; and a control unit that, when the receiving unit receives additional information that specifies a time domain resource for sending the random access preamble, replaces the time domain resource for sending the random access preamble contained in the setting information specified by the index with the time domain resource specified by the additional information for setting. According to the above structure, in the case where the time domain resource for sending the random access preamble contained in the default setting information for sending the random access preamble overlaps with the time domain resource for sending the downlink in other communication systems, the time domain resource for sending the random access preamble can be set to the other time domain resource specified by the additional information. By matching the timing of the other time domain resource specified by the additional information with the time domain resource for sending the uplink in other communication systems, the influence of interference on other communication systems caused by the transmission of the random access preamble can be reduced.

[0125] The time domain resources used to send the random access preamble code may also be resources in units of subframes, and the additional information may also specify the number of the subframe used to send the random access preamble code, and any one of the offset values ​​between the number of the subframe specified by the setting information and the number of the subframe that can actually send the random access preamble code.

[0126] According to the above configuration, for example, when the TDD method of LTE and the TDD method of NR are used in a common frequency band, by specifying the subframe for transmitting the random access preamble using additional information, the timing of the subframe for transmitting the random access preamble can be matched with the timing of the subframe of the uplink of LTE. Therefore, the influence of interference on the communication system of LTE caused by the transmission of the random access preamble in the communication system of NR can be reduced.

[0127] When the receiving unit receives an alternative index specifying setting information for sending the random access preamble code, the control unit may also replace the time domain resources for sending the random access preamble code specified by the index with the time domain resources specified by the information of the additional row for setting.

[0128] According to the above configuration, the legacy terminal does not read the alternative index but only reads the normal index. Therefore, different PRACH configuration indexes can be applied to the legacy terminal and the terminal corresponding to the above configuration, and the legacy terminal and the terminal corresponding to the above configuration can coexist.

[0129] The control unit may also set the additional setting information specified by the index when the index specifying the setting information for sending the random access preamble code is included in any one of a first set of one or more indices specifying default setting information and a second set of one or more indices specifying additional setting information, and when the index specifying the setting information for sending the random access preamble code is included in the second set.

[0130] According to the above structure, a table for specifying the default settings for random access and a new table corresponding to the default settings for random access and capable of specifying subframes that cannot be specified in the default settings as subframes capable of sending random access preamble codes are defined, and the random access settings specified in the new table can be applied to the terminal.

[0131] The time domain resource specified by the additional information may be a resource with the same timing as the time domain resource used for uplink transmission of other communication systems. According to this configuration, the influence of interference on other communication systems caused by transmission of random access preambles can be reduced.

[0132] A communication method performed by a terminal comprises: a step of receiving an index specifying setting information for sending a random access preamble; and a step of replacing the time domain resources for sending the random access preamble contained in the setting information specified by the index with the time domain resources specified by the supplementary information when additional information specifying the time domain resources for sending the random access preamble is received.

[0133] According to the above structure, in the case where the time domain resources for sending the random access preamble included in the default setting information for sending the random access preamble overlap with the timing of the time domain resources for sending the downlink in other communication systems, the time domain resources for sending the random access preamble can be set to the other time domain resources specified by the additional information. By matching the timing of the other time domain resources specified by the additional information with the time domain resources for sending the uplink in other communication systems, the influence of interference caused by the sending of the random access preamble on other communication systems can be reduced.

[0134] (Supplementary Implementation Methods)

[0135] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various variations, corrections, substitutions, replacements, etc. In order to promote the understanding of the invention, specific numerical examples are used for description, but in the absence of special instructions, these numerical values ​​are only examples, and any appropriate value may also be used. The item distinction in the above description is not essential to the present invention, and the items recorded in more than two items may also be used in combination as needed, and the items recorded in a certain item may also be applied to the items recorded in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram are not necessarily limited to the boundaries corresponding to the physical components. The operation of multiple functional units may also be performed by one physical component, or the operation of one functional unit may also be performed by multiple physical components. For the processing order described in the embodiment, as long as there is no contradiction, the order of processing may also be exchanged. For the convenience of processing description, the terminal 10 and the base station 20 are described using a functional block diagram, but such a device may also be implemented by hardware, by software, or by a combination thereof. The software operated by the processor of the terminal 10 according to the embodiment of the present invention, and the software operated by the processor of the base station 20 according to the embodiment of the present invention can also be stored in any appropriate storage medium such as random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, etc.

[0136] The notification of information is not limited to the methods / implementations described in the present disclosure, and other methods may also be used. For example, the notification of information may also be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-level 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 a combination thereof. In addition, RRC signaling may also be referred to as RRC messages, such as RRC Connection Setup messages, RRC Connection Reconfiguration messages, and the like.

[0137] The various methods / implementations described in the present disclosure may also be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (Bluetooth (registered trademark)), systems utilizing other appropriate systems, and at least one of the next generation systems expanded based on them. In addition, multiple systems can also be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

[0138] The processing procedures, timings, flow charts, etc. of each method / implementation described in this disclosure may be reversed in order as long as there is no contradiction. For example, for the method described in this disclosure, various step elements are presented in an illustrative order, and are not limited to the specific order presented.

[0139] In the present disclosure, the specific operation performed by the base station 20 may be performed by its upper node depending on the situation. In a network composed of one or more network nodes including the base station 20, various operations performed for communication with the terminal can obviously be performed by at least one of the base station 20 and other network nodes other than the base station 20 (for example, MME or S-GW, etc., but not limited thereto). In the above, the case where there is one other network node other than the base station 20 is exemplified, but it may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0140] The input and output information can also be saved in a specific location (e.g., a memory) or managed using a management table. The input and output information can be overwritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0141] The determination may be made using a value represented by 1 bit (0 or 1), a true or false value (Boolean value: true or false), or a comparison of numerical values ​​(for example, comparison with a specific value).

[0142] Each method / implementation method described in the present disclosure may be used alone, in combination, or switched during execution. In addition, notification of specific information (e.g., notification of "is X") is not limited to being performed explicitly, but may also be performed implicitly (e.g., not notifying the specific information).

[0143] Whether software is referred to as software, firmware, middleware, microcode, hardware description language, or by other names, it shall be interpreted broadly to mean instructions, instruction sets, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, etc.

[0144] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0145] Information, signals, etc. described in this disclosure may also be represented using one of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0146] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, at least one of a channel and a code element may also be a signal (signaling). In addition, a signal may also be a message.

[0147] The terms "system" and "network" used in this disclosure are used interchangeably. In addition, information, parameters, etc. described in this disclosure may also be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0148] The names used for the above parameters are not limiting in any way. Furthermore, the formulas using these parameters may differ from the formulas explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, so the various names assigned to these various channels and information elements are not limiting in any way.

[0149] In the present disclosure, terms such as “base station (BS)”, “wireless base station”, “fixed station”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “access point”, “transmission point”, “reception point”, “transmission / reception point”, “cell”, “sector”, “cell group”, “carrier”, and “component carrier” can be used interchangeably. Base stations are sometimes also referred to as macro cells, small cells, femto cells, and pico cells.

[0150] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of the base station and the base station subsystem that provides communication services within the coverage area.

[0151] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0152] A mobile station is also sometimes referred to by those skilled in the art as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or some other appropriate terminology.

[0153] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a terminal, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may also be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving car, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an IoT (Internet of Things) device such as a sensor.

[0154] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, it may also be configured that the user terminal 10 has the functions possessed by the above-mentioned base station 20. In addition, the language such as "uplink" and "downlink" may also be replaced by the language corresponding to the communication between terminals (for example, "side"). For example, the uplink channel, the downlink channel, etc. may also be replaced by the side channel.

[0155] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 20 may have the functions of the user terminal 10 described above.

[0156] Terms such as "connected", "coupled", or all variations thereof mean any direct or indirect connection or combination between two or more elements, and may include situations where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may also be physical, logical, or a combination thereof. For example, "connected" may also be replaced by "accessed". In the context of use in the present disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, using electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (both visible and invisible) region, etc.

[0157] The reference signal may also be referred to as RS (Reference Signal) for short, or may be referred to as a pilot according to an applied standard.

[0158] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise explicitly stated. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0159] In the present disclosure, when the terms “include,” “including,” and variations thereof are used, these terms mean inclusiveness, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not mean exclusive or.

[0160] A radio frame may also be composed of one or more frames in the time domain.

[0161] Each frame of one or more frames in the time domain may also be referred to as a subframe.

[0162] A subframe may also be further composed of one or more time slots in the time domain. A subframe may also be a fixed time length (eg, 1 ms) that is not dependent on a parameter set (numerology).

[0163] A parameter set may also be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. For example, a parameter set may also represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0164] A time slot may also be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing)) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access)) symbols, etc.) in the time domain. A time slot may also be a time unit based on a parameter set.

[0165] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be called a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be called a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be called a PDSCH (or PUSCH) mapping type B.

[0166] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent a time unit for transmitting a signal. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may also be referred to by other names corresponding to them.

[0167] For example, one subframe may also be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as TTI, and one time slot or one mini time slot may also be referred to as TTI. That is, at least one of the subframe and the TTI may also be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may also be referred to as a time slot, a mini time slot, etc., instead of a subframe.

[0168] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0169] TTI may also be a transmission time unit of a data packet (transport block), code block, code word, etc. after channel coding, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped may also be shorter than the TTI.

[0170] In addition, when one time slot or one mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0171] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0172] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0173] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may also be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0174] In addition, the time domain of an RB may also include one or more symbols, and may be the length of one slot, one mini slot, one subframe, or one TTI. One TTI, one subframe, etc. may also be composed of one or more resource blocks.

[0175] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like.

[0176] In addition, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0177] A bandwidth part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined by a BWP and numbered within the BWP.

[0178] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). For a UE, one or more BWPs may be configured in one carrier.

[0179] At least one of the configured BWPs may also be activated, and the UE may not assume that a specific signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0180] The above-mentioned structures of radio frames, subframes, time slots, mini-time slots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be variously changed.

[0181] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in a plural form.

[0182] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are each different from C". The terms "separate" and "coupled" may also be interpreted in the same way as "different".

[0183] The present invention has been described in detail above, but it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as a modification and variation without departing from the purpose and scope of the present invention determined by the description of the claims. Therefore, the description of this specification is for the purpose of illustration and does not have any restrictive meaning to the present invention.

[0184] Description of symbols

[0185] 10 Terminal

[0186] 110 Sending unit

[0187] 120 Receiving Unit

[0188] 130 Control unit

[0189] 20 Base Stations

[0190] 210 Sending unit

[0191] 220 Receiving Unit

[0192] 230 Control Unit

[0193] 1001 Processor

[0194] 1002 Memory

[0195] 1003 Storage

[0196] 1004 Communication device

[0197] 1005 Input Device

[0198] 1006 Output device.

Claims

1. A terminal comprising: A receiving unit, receiving an index of first setting information designated for sending a random access preamble; and a control unit, when the receiving unit receives the index, using the first setting information for sending the random access preamble, The first configuration information specified by the index having the value of the first index in the range of 256 to 262 is the same as the second configuration information specified by the index having the value of the second index in the range of 0 to 6, except for the subframe number.

2. The terminal according to claim 1, wherein: The index having the value of the first index is specified by a specific field contained in a specific signaling message, The specific signaling message is a RACH-ConfigGeneric information element, and the specific field is prach-ConfigurationIndex-v16xy.

3. The terminal according to claim 1, wherein: The first setting information for sending the random access preamble is setting information for a specific frequency range and a time division duplex (TDD) method.

4. A base station, comprising: A control unit is configured to set an index of first setting information that specifies a random access preamble set for a terminal; and a sending unit, sending the index to the terminal, The first configuration information specified by the index having the value of the first index in the range of 256 to 262 is the same as the second configuration information specified by the index having the value of the second index in the range of 0 to 6, except for the subframe number.

5. A communication method, which is a communication method of a terminal, comprising: receiving an index of first setting information designated for sending a random access preamble; and upon receiving the index, using the first setting information for transmitting the random access preamble, The first configuration information specified by the index having the value of the first index in the range of 256 to 262 is the same as the second configuration information specified by the index having the value of the second index in the range of 0 to 6, except for the subframe number.

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