RU2820990C1 - Terminal and communication method - Google Patents

Abstract

FIELD: wireless communication equipment.

SUBSTANCE: communication terminal comprising: a receiving unit configured to receive an index for transmitting a random access preamble; and a control unit configured, when a two-step random access procedure is applied, to configure a time domain resource, indicated by an index for a two-step random access procedure included in said index, as a time domain resource for transmitting a random access preamble, wherein said index includes an additional index, which is an index for a two-step random access procedure, wherein the additional index is indicated by an index with a value greater than or equal to 256, wherein the index with a value greater than or equal to 256 is included in the RACH-ConfigGeneric information element specified for a two-step random access procedure.

EFFECT: providing suppression of interference rendered by a terminal to another communication system when the terminal transmits a random access preamble.

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Description

Field of technology to which the invention relates

[0001] The present invention relates to a terminal and a communication method in a radio communication system.

State of the art

[0002] As part of the ^3rd Generation Partnership Project (3GPP), a radio communication system called New Radio (NR) or 5G was studied to achieve further increases in system capacity, further increases in data transfer rates and further reducing delay in the radio communication section. To achieve throughput greater than or equal to 10 Gbps while simultaneously meeting the requirement that the delay in the radio section be reduced to less than or equal to 1 ms, various types of radio technologies have been explored.

[0003] At the time the Release 15 specifications were defined, the dl-UL-TransmissionPeriodicity for the TDD-UL-DL-pattern was 0.5 ms, 0.625 ms, 1 ms, 1.25 ms, 2 ms, 2.5 ms, 5 ms or 10 ms. Therefore, to ensure synchronization with the DL/UL switching times of LTE TDD configurations 1, 2 and 4, values of 3 ms and 4 ms have been added as dl-UL-TransmissionPeriodicity in the specifications subsequent to the September 2018 specifications.

Related Art Documents [Non-Patent Documents]

[0004] Non-patent document 1: 3GPP TS38.211 N/15.6.0(2019-06)

Non-patent document 2: 3GPPTS36.211 N/15.6.0(2019-06)

Non-Patent Document 3: 3GPP TSG-RAN WG2 Conference No. 103, R2-1813303, Gothenburg, Sweden, August 20-24, 2018.

Non-Patent Document 4: 3GPP TSG-RAN WG2 NR Adhoc Conference

1807, R2-1810963, Montreal, Canada, July 2-6, 2018

Non-Patent Document 5: 3GPP TSG-RAN WG2#103, R2-1813279, Gothenburg, Sweden, August 20-24, 2018

Disclosure of the invention

[Problem solved by the invention]

[0005] It was assumed that the spectrum would be shared between the LTE system and the NR system, i.e. it was assumed that the LTE system and the NR system share a common frequency band. When the timing of radio frames is co-located between an LTE TDD system and an NR TDD system, and communication is carried out using a common frequency band, it is necessary to suppress interference from one communication system to the other communication system. For example, if an LTE TDD subframe is assigned to the downlink at a certain point in time and an NR TDD subframe is assigned to the uplink at the same point in time, the uplink NR transmission may cause significant interference on LTE downlink reception.

[0006] There is a need for a method of suppressing interference caused by a terminal to another system when the terminal transmits a random access preamble.

[Remedy]

[0007] According to an aspect of the present invention, there is provided a terminal that includes a receiving unit configured to receive configuration information for transmitting a random access preamble; and a control unit configured to configure, when the two-stage random access procedure is applied, a temporary domain resource indicated by an index for the two-stage random access procedure included in the configuration information as a temporary domain resource for transmitting the random access preamble.

[Advantage of the invention]

[0008] According to an embodiment of the present invention, there is provided a method for suppressing interference caused by a terminal to another system when the terminal transmits a random access preamble in a two-step random access procedure.

Brief description of drawings

[0009] FIG. 1 is a diagram illustrating an example configuration of a communication system according to an embodiment.

FIG. 2 is a diagram illustrating an example of a random access procedure.

FIG. 3 is a diagram illustrating an example of a random access configuration table.

FIG. 4 is a diagram illustrating an example of an uplink and downlink configuration for an LTE TDD system.

Figure 5 is a diagram illustrating an example of Proposition 1.

FIG. 6 is a diagram illustrating an example of a RACH-ConfigGeneric information element.

FIG. 7 is a diagram illustrating a modified example of a specification consistent with Proposition 1.

Figure 8 is a diagram illustrating an example of Proposition 2.

FIG. 9 is a diagram illustrating an example of a RACH-ConfigGeneric information element.

FIG. 10 is a diagram illustrating a modified example of a Proposition 2 specification.

FIG. 11 is a diagram illustrating an example of a RACH-ConfigGeneric information element.

FIG. 12 is a diagram illustrating a modified example of a Proposition 3 specification.

FIG. 13 is a diagram illustrating an example of a RACH-ConfigGeneric information element.

FIG. 14 is a diagram illustrating a modified example of a Proposition 4 specification.

FIG. 15 is a diagram illustrating an example of Proposition 5.

FIG. 16 is a diagram illustrating an example of a RACH-ConfigGeneric information element.

FIG. 17 is a diagram illustrating a modified example of a Proposition 5 specification.

FIG. 18 is a diagram illustrating an example of Proposition 6.

FIG. 19 is a diagram illustrating an example of a RACH-ConfigGeneric information element.

FIG. 20 is a diagram illustrating a modified example of Proposition 6 specifications.

FIG. 21 is a diagram illustrating an example of a functional configuration of the terminal.

FIG. 22 is a diagram illustrating an example of a functional configuration of a base station.

FIG. 23 is a diagram illustrating an example of a hardware configuration of a terminal and a base station.

Carrying out the invention

[0010] Below, embodiments of the present invention (embodiments) are described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention applies are not limited to the following embodiments.

[0011] It is assumed that the radio communication system according to the following embodiments generally corresponds to NR, but this is an example, and the entire radio communication system or part of the radio communication system according to the embodiments may correspond to a radio communication system other than NR (for example, LTE).

(General system configuration)

[0012] FIG. 1 is a configuration diagram of a radio communication system according to an embodiment. The radio communication system according to an embodiment includes a terminal (user equipment) 10 and a base station 20, as shown in FIG. 1. 1 shows one terminal 10 and one base station 20, but this is an example and there may be more than one terminal 10 and more than one base station 20.

[0013] The terminal 10 is a communication device having a radio communication function, such as a smartphone, a cell phone, a tablet, a wearable terminal, and a M2M (Machine-to-Machine) communication module. The terminal 10 connects wirelessly to the base station 20 and uses various communication services provided by the radio communication system. Base station 20 is a communications device that provides one or more cells and communicates wirelessly with terminal 10. Terminal 10 and base station 20 are configured to form a beam for transmitting and receiving signals. The terminal 10 may also be referred to as a UE, and the base station 20 may be referred to as an eNB.

[0014] In an embodiment, the duplex method may be a Time Division Duplex (TDD) method or a Frequency Division Duplex (FDD) method.

[0015] The technology according to the embodiment refers to a random access procedure or the like. Accordingly, these operating examples are first described in a radio communication system.

(Random access procedures, etc.)

[0016] With reference to FIG. 2, an example of a random access procedure according to this embodiment will be described. The procedure illustrated in FIG. 2 may also be referred to as initial access.

[0017] The base station 20 transmits a block of synchronization signals and physical broadcast channel (SS/PBCH, from the English. Synchronization Signals and Physical Broadcast Channel) (also called SSB) in a given period, and the terminal 10 receives the block SS/RVSN (S11). The SS/PBCH block includes a synchronization signal, part of the system information necessary for initial access (system frame number (SFN), information necessary for reading residual system information, etc.). The terminal 10 receives system information block 1 (SIB1, from the English System Information Block 1) from the base station 20 (S12).

[0018] Next, terminal 10 transmits Message 1 (Msg1 (from English Messagel) (= RA preamble)) (S13).

[0019] In response to detection of a random access (RA) preamble, the base station 20 transmits a response, i.e. Message 2 (Msg2 (= RA response)) to terminal 10 (S14). In the following description, "Msg2" includes a Physical Downlink Control Channel (PDCCH) used for scheduling, and a Physical Downlink Shared Channel (PSDCH) for transmitting basic information.

[0020] In response to receiving the RA response, the terminal 10 transmits Message 3 (Msg3) including predetermined information to the base station 20 (step S15). For example, Message 3 is an RRC connection request.

[0021] In response to receiving Message 3, the base station 20 transmits Message 4 (Msg4, eg, RRC connection setup) to the terminal 10 (S16). After detecting that the above-described predetermined information is included in Message 4, the terminal 10 determines that Message 4 corresponds to the above-described Message 3, and Message 4 is addressed to the terminal 10, the terminal 10 completes the random access procedure, and the terminal 10 establishes an RRC connection ( S17). It should be noted that FIG. 2 illustrates an example of a case in which Message 3 and Message 4 are transmitted. However, this is just an example. The technique according to the embodiment can be applied to a random access procedure in which Message 3 and Message 4 are not transmitted.

[0022] Regarding the transmission interval of the random access preamble, Non-Patent Document 1 specifies that the random access preamble can only be transmitted in the temporary resource specified by the higher-level parameter prach-ConfigIndex.

[0023] Figure 3 is a diagram illustrating an example table of random access configurations specified using prach-Configlndex for Frequency Range (FR) 1 and TDD.

[0024] For example, assume that the value 0 is transmitted from the base station 20 to the terminal 10 as a PRACH configuration index. In this case, in response to receiving the value 0 as the PRACH configuration index, the terminal 10 may detect that the preamble format is 0; the frequency of the random access preamble transmission interval is 160 ms; and the random access preamble transmission interval is subframe 9 among subframes 0 to 9 included in the 10 ms radio frame.

[0025] n _SFN mod x=y, as shown in FIG. 3, defines a radio frame number that includes a random access preamble transmission interval. For example, when x=16 and y=1, the random access preamble transmission intervals are radio frames with system frame number (SFN)=1, 17, 33, .... Since the duration of one radio frame is 10 ms when x=16 and y=1, the random access preamble transmission interval periodicity is 160 ms. In the example of Fig. 3, when the PRACH configuration index value is 1, the random access preamble transmission interval periodicity is 80 ms; when the PRACH configuration index value is 2, the random access preamble transmission interval periodicity is 40 ms; and when the PRACH configuration index value is any from 3 to 6, the random access preamble transmission interval periodicity is 20 ms.

[0026] FIG. 4 is a diagram illustrating an example of uplink and downlink configuration for the LTE time division duplex (TDD) communication method. In the example shown in FIG. 4, 10 subframes are included in a 10 ms radio frame, and each subframe is a downlink subframe (denoted as D), an uplink subframe (denoted as U), or a special subframe (denoted as S).

[0027] At the time the 3GPP Release 15 specifications were defined, the dI-UL-TransmissionPeriodicity for the TDD-UL-DL-pattern was 0.5 ms, 0.625 ms, 1 ms, 1.25 ms, 2 ms , 2.5 ms, 5 ms or 10 ms.

[0028] In this regard, to ensure synchronization with DL/UL switching times for LTE TDD configurations 1, 2 and 4, values of 3 have been added as dI-UL-Transmission Periodicity to the specifications subsequent to the September 2018 specifications ms and 4 ms. As described above, it is assumed that the time point of the LTE TDD system radio frame is consistent with the time point of the NR TDD system radio frame. In addition, it was assumed that the spectrum would be shared between the LTE system and the NR system, i.e. it was assumed that the LTE system and the NR system share a common frequency band.

[0029] When radio frame times are co-located between an LTE TDD system and an NR TDD system, and communication is carried out using a common frequency band, it is necessary to suppress interference from one communication system to another communication system. For example, if an LTE TDD subframe is assigned to the downlink at a certain point in time and an NR TDD subframe is assigned to the uplink at the same point in time, the uplink NR transmission may cause significant interference on LTE downlink reception. Accordingly, when an LTE TDD system and an NR TDD system are used in a common frequency band, it is assumed that an LTE TDD subframe and an NR TDD subframe with a time point that coincides with the LTE TDD subframe are assigned to an uplink or a downlink.

[0030] Here, assume that the timing of a radio frame of the LTE TDD system is coordinated with the timing of a radio frame of the NR TDD system, and that spectrum sharing is performed between the LTE system and the NR system. In addition, assume that in the LTE system, 2 is configured as the uplink/downlink configuration shown in FIG. 4. In this case, among the radio frames of the LTE system, the subframes assigned to the uplink are subframe 2 and subframe 7.

[0031] Accordingly, when terminal 10 transmits a random access preamble in an NR system, it is assumed that terminal 10 transmits random access preambles in subframe 2 and/or subframe 7.

[0032] However, according to the table illustrated in FIG. 3, when the PRACH configuration index is any of 0 to 6, the subframes for random access preamble transmission are 9 and 4, and it is not assumed that subframes 2 and 7 should be specified .

[0033] There is a need for a method to allow terminal 10 in an NR system to transmit a random access preamble at a subframe time that is specified for an uplink in an LTE system.

(Sentence 1)

[0034] FIG. 5 is a diagram illustrating an example of Proposition 1. In the method of Proposition 1, the table that defines the random access configurations shown in FIG. 3 is used as is (the table shown in FIG. 3 is not itself changed). For example, the base station 20 notifies the terminal 10 of any index among the indexes 0-6 of the PRACH configuration table illustrated in FIG. 3. In addition, the base station 20 notifies the terminal 10 of the subframe number specifying the random access preamble transmission interval through RRC signaling. The terminal 10 does not apply the subframe number specified in the table illustrated in FIG. 3, but applies the subframe number received from the base station 20 as the random access preamble transmission interval.

[0035] For example, the base station 20 transmits the value 0 as the PRACH configuration index to the terminal 10. In addition, the base station 20 reports, for example, 7 as the subframe number specifying the random access preamble transmission interval. The terminal 10 receives the value 0 as the PRACH configuration index and configures subframe 7 as a subframe in which random access preamble transmission is possible in response to receiving subframe number 7 specifying a random access preamble transmission interval. In this case, the radio frame in which the random access preamble can be transmitted is SFN=1, 17, 33, ... That is, the terminal 10 configures 160 ms as the periodicity of the random access preamble transmission intervals.

[0036] FIG. 6 is a diagram illustrating an example of a RACH-ConfigGeneric information element that may be used by base station 20 to notify terminal 10 of a subframe number defining a random access preamble transmission interval. The value of the prach-Subframe field included in the RACH-ConfigGeneric information element shown in FIG. 6 may indicate the number of the subframe in which the random access preamble may be transmitted. FIG. 7 is a diagram illustrating a modified example of a specification consistent with Proposition 1.

[0037] (Sentence 2)

FIG. 8 is a diagram illustrating an example of Proposition 2. In the method of Proposition 2, the table that defines the random access configurations shown in FIG. 3 is used as is (the table shown in FIG. 3 is itself not modified). For example, the base station 20 notifies the terminal 10 of any index from indexes 0-6 of the PRACH configuration table illustrated in FIG. 3. In addition, the base station 20 notifies the terminal 10 of the offset between the subframe number indicated in the table in FIG. 3 and the subframe number in which random access preamble transmission is actually possible through RRC signaling. The terminal 10 sets the number obtained by applying the modulo 10 calculation to the value obtained by adding the offset value to the subframe number indicated in the table illustrated in FIG. 3 as the subframe number in which random access preamble transmission is possible.

[0038] For example, the base station 20 transmits the value 0 as the PRACH configuration index to the terminal 10. In addition, the base station 20 reports to the terminal 10, through RRC signaling, 8 as the offset value between the subframe number specified in the table in FIG. 3, and the number of the subframe in which the random access preamble can actually be transmitted. The terminal 10 receives the value 0 as the PRACH configuration index and, in response to receiving 8 as the offset value between the subframe number indicated in the table in FIG. 3 and the subframe number in which the random access preamble can actually be transmitted, calculates (9 +8) mod 10=7 and sets subframe 7 as the subframe in which the random access preamble can be transmitted. In this case, the radio frames in which the random access preamble can be transmitted are SFN=1, 17, 33, ... That is, the terminal 10 sets 160 ms as the periodicity of the random access preamble transmission intervals.

[0039] FIG. 9 is a diagram illustrating an example of a RACH-ConfigGeneric information element that may be used by base station 20 to notify terminal 10 of an offset between the subframe number indicated in the table in FIG. 3 and the subframe number in which the subframe may actually random access preamble is transmitted. The values of the prach-Subframe field included in the RACH-ConfigGeneric information element illustrated in FIG. 9 may indicate an offset between the subframe number indicated in the table in FIG. 3 and the subframe number in which transmission of the random access preamble is actually possible. FIG. 10 is a diagram illustrating a modified example of a Proposition 2 specification.

[0040] (Sentence 3)

When the base station 20 attempts to configure any of the PRACH configuration indexes 0 to 6 shown in FIG. 3 for the terminal 10, for example, the PRACH configuration index IndexAlt may be determined as an index that is different from the PRACH configuration index shown in FIG. 3 , assuming a case in which only the subframe number is set to 2 or 7 instead of 4 or 9. The base station 20 may set any value from 0 to 6 as the IndexAlt of the PRACH configuration and notify the terminal 10 of the IndexAlt of the PRACH configuration through signaling RRC. Additionally, base station 20 may notify terminal 10 of subframe number 2 or 7 via RRC signaling. In this case, for example, it is possible to set only the number of the subframe in which the random access preamble can be transmitted to 2 or 7 instead of 4 or 9, while configuring the random access resource corresponding to any of the PRACH configuration indexes 0 to 6 shown in Fig. 3, without changing the table in Fig. 3 as such. As described above, when the new parameter "PRACH Configuration IndexAlt Index" is defined, the legacy terminal does not read the "PRACH Configuration IndexAlt Index", but only reads the PRACH Configuration Index. Accordingly, it is possible to apply different PRACH configuration indexes to the legacy terminal and the terminal 10 that supports the method according to Proposition 3, respectively, and the legacy terminal and the terminal 10 supporting the method according to Proposition 3 can coexist.

[0041] FIG. 11 is a diagram illustrating an example of a RACH-ConfigGeneric information element that may be used by the base station 20 to notify the terminal 10 of the PRACH configuration IndexAlt and subframe number. By setting the value of the prach-ConfigurationIndexAlt field included in the RACH-ConfigGeneric information element shown in FIG. 11 to any value from 0 to 6 and setting the subframe number (the value of the prach-Subframe field in FIG. 11) to 2 or 7, the basic The station 20 may set the terminal 10 to only have a subframe number of 2 or 7 instead of 9, while configuring a random access configuration corresponding to any of the PRACH configuration indexes 0 to 6 shown in FIG. 3 for the terminal 10. That is, upon receiving the PRACH-ConfigGeneric information element, the terminal 10 determines whether the prach-ConfigurationIndexAlt field is contained. In response to detecting that the PRACH-ConfigGeneric information element includes a prach-ConfigurationIndexAlt field, the terminal 10 receives any value from 0 to 6 specified in the prach-Configuration IndexAlt field, and receives 2 or 7 as the subframe number. As a result, the terminal 10 can configure a random access resource corresponding to a PRACH configuration index corresponding to the value set in the prach-Configuration IndexAlt field by setting 2 or 7 as the subframe number in which the random access preamble can be transmitted. FIG. 12 is a diagram illustrating a modified example of a Proposition 3 specification.

(Sentence 4)

[0042] When the base station 20 attempts to set any of the PRACH configuration indexes 0 to 6 shown in FIG. 3 to the terminal 10, for example, the PRACH configuration index IndexAlt may be set as an index that is different from the PRACH configuration index shown in 3, a case in which only the subframe number is set to 2 or 7 instead of 4 or 9 is assumed. The base station 20 may set any value from 0 to 6 as the IndexAlt of the PRACH configuration and notify the terminal 10 of the configuration IndexAlt. PRACH via RRC signaling. In addition, the base station 20 notifies the terminal 10 of the offset between the subframe number indicated in the table in FIG. 3 and the subframe number in which random access preamble transmission is actually possible through RRC signaling. In this case, for example, it is possible to set only the number of the subframe in which the random access preamble can be transmitted to 2 or 7 instead of 4 or 9, while configuring the random access resource corresponding to any of the PRACH configuration indexes 0 to 6 shown in Fig. 3, without changing the table in Fig. 3 as such. As described above, when the new parameter "PRACH Configuration IndexAlt Index" is specified, the legacy terminal does not read the "PRACH Configuration IndexAlt Index", but only reads the PRACH Configuration Index. Accordingly, different PRACH configuration indices can be applied to the legacy terminal and the terminal 10 supporting the method of Proposition 3. The legacy terminal and the terminal 10 supporting the method of Proposition 3 can coexist.

[0043] FIG. 11 is a diagram illustrating an example of a RACH-ConfigGeneric information element that may be used by the base station 20 to notify the terminal 10 of the PRACH configuration IndexAlt and subframe number. By setting the value of the prach-Configuration IndexAlt field included in the RACH-ConfigGeneric information element shown in FIG. 11 to any value from 0 to 6 and setting the value of the subframe number offset (the value of the prach-SubframeOffset field in FIG. 13) to 3 or 8, the base station 20 may set only the subframe number to 2 or 7 instead of 4 or 9, while configuring the random access configuration corresponding to any of the PRACH configuration indexes 0 to 6 shown in FIG. 3 to the terminal 10. After upon receiving the PRACH-ConfigGeneric information element, the terminal 10 determines whether the prach-Configuration IndexAlt field is contained. In response to detecting that the PRACH-Configuration IndexAlt field is contained in the PRACH-ConfigGeneric information element, the terminal 10 receives a value from 0 to 6 set in the prach-ConfigurationIndexAlt field and, in response to receiving 3 or 8 as the number offset value subframe, calculates (3+9) mod 10=2 or (8+9) mod 10=7 (or (3+4) mod 10=7 or (8+4) mod 10=2), and sets subframe 2 or 7 as a subframe in which transmission of a random access preamble is possible. FIG. 14 is a diagram illustrating a modified example of a Proposition 4 specification.

(Sentence 5)

[0044] The random access configuration table for FR1 and TDD shown in FIG. 3 may be expanded to include a PRACH configuration index corresponding to any of the PRACH configuration indices 0-6 shown in FIG. 3, wherein only the number subframes are changed to 2 or 7 instead of 4 or 9. FIG. 15 is a diagram illustrating an example of Proposal 5. In the table illustrated in FIG. 15, 256 to 271 are added as PRACH configuration indexes, and for any of the indexes 256 to 269 , the random access configuration corresponds to any of the PRACH configuration indexes 0-6, with only the subframe number changed to 2 or 7 instead of 4 or 9. An extension can also be made such that the base station 20 can report a PRACH configuration index that is a value greater than or equal to 256 in the RACH-ConfigGeneric information element, which can be used to report a PRACH configuration index to terminal 10.

[0045] FIG. 16 is a diagram illustrating an example of a RACH-ConfigGeneric information element that may be used by base station 20 to report a PRACH configuration index to terminal 10. The prach-Configurationlndex-v16xy field contained in the RACH-ConfigGeneric information element shown in FIG. 16 provides the ability to notify a PRACH configuration index with a value greater than or equal to 256. FIG. 17 is a diagram illustrating a modified example of a Proposition 5 specification.

(Sentence 6)

[0046] FIG. 18 is a diagram illustrating an example of Proposition 6. In the method of Proposition 6, a table is again specified that corresponds to the table for indicating a random access configuration shown in FIG. 3, and which may indicate subframe number 2 or 7 as subframe in which the random access preamble can be transmitted. In the table shown in FIG. 18, indices 0-6 corresponding to the PRACH configuration indices shown in FIG. 3 and capable of indicating subframe number 2, and indices 7-13 corresponding to the PRACH configuration indices shown in FIG. 3 and capable of indicate subframe number 7.

[0047] FIG. 19 is a diagram illustrating an example of a RACH-ConfigGeneric information element that can be used by the base station 20 to report a PRACH configuration index to the terminal 10. Using the prach-Configuration IndexAlt field contained in the RACH-ConfigGeneric information element shown In FIG. 19, a PRACH configuration index may be reported, which corresponds to the PRACH configuration index shown in FIG. 3, and which may indicate subframe number 2 or 7. FIG. 20 is a diagram illustrating a modified example of a Proposition 6 specification.

[0048] As described in the above-disclosed embodiments, the NR time domain resource specified by the PRACH configuration index, which is capable of transmitting a random access preamble, can be accessed only if the time point coincides with the time point of the LTE UL transmission resource for the unpaired spectrum (TDD).

[0049] A UE capability corresponding to the above-described extensions of Proposal 1 to Proposal 6 may be defined. With respect to the terminal 10 in connected mode, for example, the terminal 10 supporting EN-DC, the terminal 10 may have a RACH-ConfigGeneric based on any from Proposal 1 to Proposal 6, based on UE capability.

[0050] It should be noted that in the above methods according to Proposition 1 to Proposition 6, all entries in the RACH configuration table (the table defining the random access configuration) are informed of the offset to be applied to the subframe number, etc. In this case, the modification affects all entries in the RACH configuration table (there are 256 indexes in one table), and the impact on the terminal implementation can be significant.

(Sentence 7)

[0051] For the RACH configuration table, the offset applied to the subframe number may be re-notified via RRC. In this case, the applicable records and/or tables may be limited.

[0052] For example, terminal 10 may apply the offset to be applied to the subframe number only to a specific entry (eg, entries with indices 0-6) in the RACH configuration table.

[0053] Terminal 10 may also use an existing table as a RACH configuration table or a table that is separately reported using RRC. Even if a table that is separately reported by RRC is used, the terminal 10 may apply the offset that should be applied to the subframe number only to a specific entry in the RACH configuration table reported by RRC.

(Sentence 8)

[0054] Some of the parameters notified to the terminal 10 using the RACH configuration table may be overwritten or changed by a separate notification (message) using the RRC. In this case, the terminal 10 may limit the applicable entries and/or tables for a portion of the parameters separately reported via RRC.

[0055] The above-described part of the parameters may be, for example, a preamble format, a RACH configuration period (period reported as x in the RACH configuration table), SFN allocated to the RACH configuration period (system frame number reported as y in the RACH configuration table ), subframe number (subframe number), starting symbol in one slot (starting symbol), number of PRACH slots in a subframe (number of PRACH slots within a subframe), number of time domain PRACH slots in a PRACH slot, PRACH duration, etc.

[0056] For example, if "x=2" is reported to terminal 10 in other RRC signaling, terminal 10 may overwrite the value of x with x=2 and transmit the PRACH even if the value of x indicated by the RACH configuration index is 1.

[0057] The parameter value that can be reported for overwriting or changing may be all available values that can be reported. Alternatively, the parameter value that may be reported for overwriting or modification may be limited by the specification to some of the available values that may be reported.

[0058] For example, terminal 10 may apply only the parameter value reported for overwriting or modification to indices 0-6 of the RACH configuration table.

(Sentence 9)

[0059] The terminal 10 may report whether the reported offset value can be applied to the subframe number in the RACH configuration table as a UE capability. Additionally or alternatively, tables and/or records to which the reported offset value is applicable (i.e., a range to which the offset value is applicable) may be determined, and terminal 10 may report the table and/or record to which the specified offset value is applicable. ,as a UE capability.

[0060] For example, three or more patterns may be specified: the reported offset value cannot be applied to the subframe number of the RACH configuration table; the reported offset value may be applied to the subframe number of a portion of the entries in the RACH configuration table; and the reported offset value may be applied to the subframe numbers of all entries in the RACH configuration table. Terminal 10 may report any of three or more patterns.

[0061] In non-stand-alone mode (NSA, from English non-stand-alone), i.e. when LTE is used as the primary cell group and NR is used as the secondary cell group, the connection between the terminal 10 and the LTE system has been established before transmitting the initial PRACH signal to the NR system. Accordingly, the terminal 10 may transmit the UE capability to the network side before the initial transmission of the PRACH. Accordingly, the UE capability described above may be a UE capability limited only to the NSA terminal 10. Alternatively, the UE capability described above may be a UE capability for both the stand-alone (SA) terminal 10 and the NSA terminal 10. When the above-described UE capability is applied to the SA terminal 10, the application of the above-described UE capability may be omitted for initial access before reporting the UE capability.

(Sentence 10)

[0062] The terminal 10 may report whether a function for overwriting or changing a corresponding portion of parameters in the RACH configuration table by a portion of the parameters of the PRACH configuration table separately reported by RRC can be applied as a UE capability. Additionally or alternatively, a table and/or entry (i.e., a range that can be overwritten or modified) may be defined that may be overwritten or modified by a portion of the RACH configuration table parameters separately reported by RRC, and the terminal 10 may report , optionally by the UE, a table and/or entry that can be overwritten or modified by a portion of the RACH configuration table parameters separately communicated by the RRC.

[0063] For example, three or more patterns may be specified: a function for overwriting or changing a corresponding portion of the RACH configuration table parameters by a portion of the RACH configuration table parameters cannot be applied; the corresponding parameter portion of the RACH configuration table entry portion may be overwritten or modified by the RACH configuration table parameter portion separately notified by the RRC; or the corresponding parameter portion of all RACH configuration table entries may be overwritten or modified by the RACH configuration table parameter portion separately communicated by RRC. The terminal can report any pattern of three or more patterns.

[0064] The UE capability described above may be a UE capability limited only to the NSA terminal 10. Alternatively, the UE capability described above may be a UE capability for both stand-alone (SA) terminal 10 and NSA terminal 10. When the above-described UE capability is applied to the SA terminal 10, the application of the above-described UE capability may be omitted for initial access before reporting the UE capability.

(Sentence 11)

[0065] The details of a portion of the entries in an existing RACH configuration table may be changed (eg, the details may be changed by a definition in the specification).

[0066] For example, for entries with index 0 - 6 in the RACH configuration table, the subframe number may be changed to 2 and/or 7.

[0067] Alternatively, for example, 2 and/or 7 may be added in addition to the existing subframe number for index entries 0-6 of the RACH configuration table (table defining random access configurations) shown in Figure 3. Here, since there is a rule for When a RACH resource that overlaps with the downlink (DL) region is turned off, a resource other than the intended RACH resource is turned off.

[0068] For example, in the RACH configuration table (table for indicating random access configurations) shown in FIG. 3, the subframe number may be changed to 7, or 7 may be added (the subframe number is 7 or 7 and 9) to the index entries 0 -4 (subframe number is 9 in these entries). In addition, the subframe number may be changed to 2, or 2 may be added (the subframe number is 2 or 2 and 4) to the RACH configuration table index entries 5-6 (in these entries, the subframe number is 4).

[0069] The existing RACH configuration table described above may be, for example, a 3GPP Release 15 RACH configuration table. The RACH configuration table obtained by changing the details of a portion of the entries of an existing RACH configuration table may be a 3GPP Release 16 RACH configuration table or a RACH configuration table version subsequent to 3GPP version 16.

[0070] The base station 20 may inform the terminal 10 whether to use the 3GPP version 15 RACH configuration table or the 3GPP version 16 RACH configuration table (or the RACH configuration table of the version subsequent to 3GPP version 16) (for example, may be reported using 1- RRC bit signaling).

[0071] In addition, the UE capability may be defined to indicate that the 3GPP RACH configuration table version 16 (or a version subsequent to 3GPP version 16) may be used, and the terminal 10 may report the above-described capability to the UE.

[0072] The UE capability described above may be a UE capability limited only to the NSA terminal 10. Alternatively, the UE capability described above may be a UE capability for both stand-alone (SA) terminal 10 and NSA terminal 10. When the above-described UE capability is applied to the SA terminal 10, the application of the above-described UE capability may be omitted for initial access before reporting the UE capability.

[0073] According to the above-described embodiments, when the timings of the UL DL TDD configurations are negotiated between the LTE TDD system and the NR TDD system, the NR system can support any RACH periodicity of 20 ms, 40 ms, 80 ms and 160 ms.

(Modified example)

[0074] It is assumed that the proposed methods described above are applicable to a 4-stage RACH. However, the embodiments are not limited to the above-described examples. Namely, the proposed methods described above can be applied, for example, to a 2-stage RACH.

[0075] In a 2-step RACH procedure, the RACH procedure is performed in two steps. Specifically, the terminal 10 transmits message A to the base station 20. Next, the base station 20 transmits message B to the terminal 10. Here, Message A is the message corresponding to Message 1+Message 3 in the 4-step RACH procedure shown in FIG. 2. Message B is the message corresponding to Message 2+Message 4 in the 4-step RACH procedure shown in FIG. 2.

[0076] Message A is formed from a random access preamble and data transmitted over a physical uplink shared channel (PUSCH, from the English Physical Uplink Shared Channel). From a higher level point of view, message A can be considered as one message. However, from a physical layer perspective, it is contemplated that, for example, in message A, the random access preamble resource may be a resource separate from the PUSCH resource. In other words, it is assumed that the transmission of Message A by the terminal 10 corresponds to the transmission of two signals, that is, after the terminal 10 transmits the random access preamble, before receiving the Message from the base station 20, data (equivalent to Message 3) is transmitted on the PUSCH. Like Message A, the order of the random access preamble transmission timing and the PUSCH transmission timing may be reversed.

(Modified Example 1 of Sentence 5)

[0077] As described above, Proposal 5 proposes to extend the random access configuration table (entry) shown in FIG. 3 for the FR1 and TDD cases to add a PRACH configuration index corresponding to any of the PRACH configuration indexes 0-6 shown in Fig. 3, while changing only the subframe number to 2 or 7, instead of 4 or 9. Fig. 15 is a diagram illustrating an example of Proposition 5. In the table (entries) shown in Fig. 15, 256 - 271 are added as PRACH configuration index, and any of the indices 256 - 269 provides the ability to configure random access according to any of the PRACH configuration indices 0-6, while changing only the subframe number to 2 or 7, instead of 4 or 9. Proposal 5 also proposes an extension, allowing the base station 20 to report a PRACH configuration index that is greater than or equal to 256 in the RACH-ConfigGeneric information element, which can be used to report the PRACH configuration index to the terminal 10.

[0078] FIG. 16 is a diagram illustrating an example of a RACH-ConfigGeneric information element that may be used by base station 20 to report a PRACH configuration index to terminal 10. The prach-Configurationlndex-v16xy field contained in the RACH-ConfigGeneric information element shown in FIG. 16 allows a PRACH configuration index to be reported with a value greater than or equal to 256. FIG. 17 is a diagram illustrating a modified example of a Proposition 5 specification.

[0079] In the modified Example 1 of Proposition 5, for example, the above-described RACH-ConfigGeneric information element, which can be used by the base station 20 to report a PRACH configuration index to the terminal 10, is modified. For example, the above-described RACH-ConfigGeneric information element can be defined for 4-stage RACH, and the above-described RACH-ConfigGeneric information element can be defined for a 2-stage RACH. In addition, the interpretation of the signaling and/or number of bits in the case of a 4-stage RACH may differ from the interpretation of the signaling and/or number of bits in the case of a 2-stage RACH.

[0080] In particular, for example, the RACH-ConfigGeneric information element shown in FIG. 16 may further include prach-Configurationlndex-2step, which can be any of an integer value from 0 to 255, and prach-Configurationlndex-2step- flag, which can take a boolean value.

[0081] For example, when a 4-stage RACH is used, the terminal 10 may apply a PRACH configuration index that has a value greater than or equal to 256 specified by the value of the prach-ConfigGenerationlndex-v16xy field of the RACH-ConfigGeneric information element. However, for example, when a 2-step RACH is used, the terminal 10 may select to use the table (entry) shown in FIG. 3 or the table (entry) shown in FIG. 15 based on the value of the parameter prach-Configurationlndex-2step-flag in RACH-ConfigGeneric information element. For example, if the prach-Configuration lndex-2step-flag value is 1, the terminal 10 may use the table (entry) shown in FIG. 15 and apply a PRACH configuration index that has a value greater than or equal to 256 based on the value of the prach field -Configuration Index-v16xy. For example, if the value of prach-Configurationlndex-2step-flag is 0, the terminal 10 may use the table (entry) shown in FIG. 3 and apply a configuration index PRACH, which is any value from 0 to 255, based on the value of the prach field -Configurationlndex-2step.

[0082] In the example described above, prach-ConfigurationIndex-2step-flag may be true or false, but the embodiments are not limited to this example. For example, the prach-Configuration lndex-2step-flag data type can be set to "ENUMERATED", and the prach-Configuration lndex-2step-flag can be either "enabled" or "locked". ("disabled"). In this case, for example, "enabled" may correspond to "1" in the above example, and "disabled" may correspond to "0" in the above example.

(Modified Example 2 of Proposition 5)

[0083] In the modified Example 1 of Proposition 5 described above, the RACH-ConfigGeneric information element is defined for 4-stage RACH, and the RACH-ConfigGeneric information element is defined for 2-stage RACH. In contrast, a common information element RACH-ConfigGeneric can be defined for 4-stage RACH and 2-stage RACH in modified Example 2 of Proposition 5.

[0084] In particular, for example, the RACH-ConfigGeneric information element shown in FIG. 16 may further include prach-ConfigurationIndex-2step, which can be any of an integer value from 0 to 255, and prach-ConfigurationIndex-2step- v16xy, which can report a PRACH configuration index that is a value greater than or equal to 256.

[0085] For example, when a 4-stage RACH is applied, the terminal 10 may apply a PRACH configuration index that has a value greater than or equal to 256 specified by the value of the prach-ConfigGenerationlndex-v16xy field of the RACH-ConfigGeneric information element. In contrast, for example, when 2-step RACH is applied, terminal 10 may apply a PRACH configuration index that is any value from 0 to 255 based on the value of the prach-Configurationlndex-2step field, or terminal 10 may apply a PRACH configuration index. which is a value greater than or equal to 256 based on the value of the prach-Configurationlndex-v1 field of bhu.

[0086] For example, through additional RRC signaling, whether a new entry (or table) is used (assigned) or an existing entry (or table) is used (assigned) is reported with a single bit, and, based on the value of the RRC signaling, the existing a record (or table) can be assigned to the PRACH configuration index value.

[0087] (Modified Example 1 of Proposition 6)

In the method of Proposition 6, a table is again specified that corresponds to the table for indicating the random access configuration shown in FIG. 3, and which may indicate subframe number 2 or 7 as the subframe in which the random access preamble can be transmitted. In the table shown in FIG. 18, indices 0-6 corresponding to the PRACH configuration indices shown in FIG. 3 and capable of indicating subframe number 2, and indices 7-13 corresponding to the PRACH configuration indices shown in FIG. 3 and capable of indicate subframe number 7.

[0088] FIG. 19 is a diagram illustrating an example of a RACH-ConfigGeneric information element that can be used by the base station 20 to report a PRACH configuration index to the terminal 10. Using the prach-Configuration IndexAlt field included in the RACH-ConfigGeneric information element shown In FIG. 19, a PRACH configuration index corresponding to the PRACH configuration index shown in FIG. 3 and capable of indicating a subframe number 2 or 7 may be reported.

[0089] In the modified example 1 of Proposition 6, for example, the above-described example of the RACH-ConfigGeneric information element, which can be used by the base station 20 to report a PRACH configuration index to the terminal 10, is modified. For example, the above-described RACH-ConfigGeneric information element can be defined for 4- stage RACH, and the above-described RACH-ConfigGeneric information element can be defined for 2 stage RACH. In addition, the interpretation of the signaling and/or number of bits in the case of a 4-stage RACH may differ from the interpretation of the signaling and/or number of bits in the case of a 2-stage RACH.

[0090] In particular, for example, the RACH-ConfigGeneric information element shown in FIG. 16 may further include prach-Configuration lndex-2step, which can be any of an integer value from 0 to 255, and prach-Configuration lndex-2step -flag, which can take a boolean value.

[0091] For example, when a 4-stage RACH is applied, the terminal 10 may apply a PRACH configuration index, which is any value from 0 to 15 in the table in FIG. 18 based on the value of the prach-ConfigGenerationlndexAlt-r16 field of the RACH-ConfigGeneric information element. However, for example, when a 2-step RACH is used, the terminal 10 may choose to use the table (entry) shown in FIG. 3 or the table (entry) shown in FIG. 18 based on the value of the prach-Configuration parameter lndex-2step-flag in the RACH-ConfigGeneric information element. For example, if the value of prach-Configurationlndex-2step-flag is 1, the terminal 10 may use the table (entry) shown in FIG. 18 and apply a configuration index PRACH, which is any value from 0 to 15, based on the value of the prach field -ConfigurationlndexAlt-r16. For example, if the value of prach-Configurationlndex-2step-flag is 0, the terminal 10 may use the table (entry) shown in FIG. 3 and apply a configuration index PRACH, which is any value from 0 to 255, based on the value of the prach field -Configurationlndex-2step.

[0092] In the example described above, prach-ConfigurationIndex-2step-flag may be true or false, but the embodiments are not limited to this example. For example, the prach-Configuration lndex-2step-flag data type can be set to "ENUMERATED", and the prach-Configuration lndex-2step-flag can be either "enabled" or "locked". ("disabled"). In this case, for example, "enabled" could correspond to "1" in the above example, and "disabled" could correspond to "O" in the above example.

[0093] (Modified Example 2 of Proposition 6)

In the modified Example 1 of Proposition 6 described above, the RACH-ConfigGeneric information element is defined for 4-stage RACH, and the RACH-ConfigGeneric information element is defined for 2-stage RACH. In contrast, a common information element RACH-ConfigGeneric can be defined for 4-stage RACH and 2-stage RACH in modified Example 2 of Proposition 6.

[0094] In particular, for example, the RACH-ConfigGeneric information element shown in FIG. 19 may further include prach-Configurationlndex-2step, which can be any of an integer value from 0 to 255, and prach-ConfigurationlndexAlt-2step- r16, which can take any value from 0 to 15.

[0095] For example, when a 4-stage RACH is applied, the terminal 10 may apply a PRACH configuration index, which is any value from 0 to 15 specified by the value of the prach-ConfigGenerationlndexAlt-r16 field of the RACH-ConfigGeneric information element. In contrast, for example, when 2-step RACH is used, the terminal 10 may use, in the table of FIG. 3, a PRACH configuration index, which is any value from 0 to 255 based on the value of the prach-Configurationlndex-2step field, or terminal 10 may apply, in the table (entries) in FIG. 18, a PRACH configuration index, which is any value from 0 to 15 based on the value of the prach-ConfigurationIndex-v16xy field.

[0096] For example, through additional RRC signaling, whether a new entry (or table) is used (assigned) or an existing entry (or table) is used (assigned) is reported with a single bit, and, based on the value of the RRC signaling, the existing entry ( or table) can be assigned to the PRACH configuration index value.

[0097] According to embodiments, a method is provided that allows the NR system terminal 10 to transmit a random access preamble at a subframe time point that is assigned to an uplink in an LTE system, not only for a 4-stage RACH, but also for a 2-stage RACH. staged RACH.

[0098] (Device Configuration)

Next, an example of the functional configuration of the base station 20 and the terminal 10 for performing the processes and operations described above will be described. The base station 20 and terminal 10 include functions for implementing the above-described embodiments. However, each of the base station 20 and terminal 10 may include only a portion of the functions in the embodiments. The terminal 10 and the base station 20 may be collectively referred to as a communication device.

[0099] <User Equipment>

FIG. 21 is a diagram illustrating an example of a functional configuration of the terminal 10. As shown in FIG. 21, the terminal 10 includes a transmission unit 110, a receiving unit 120, and a control unit 130. The functional configuration shown in FIG. 21 is just an example. The functional division and names of the functional blocks may be any division and names as long as the operation according to the embodiments can be performed. It should be noted that the transmitting unit 110 may be referred to as a transmitter and the receiving unit 120 may be referred to as a receiver.

[0100] The transmission unit 110 creates a transmission signal from the transmission data and transmits the specified transmission signal via radio communication. The transmission unit 110 may generate one or more beams. The receiving unit 220 wirelessly receives various types of signals and obtains higher level signals from the received physical layer signals. In addition, the receiving unit 120 includes a measurement unit that measures the received signal to obtain received power, etc.

[0101] The control unit 130 controls the terminal 10. A function of the control unit 130 related to transmission may be included in the transmitting unit 110, and a function of the control unit 130 related to receiving may be included in the receiving unit 120.

[0102] For example, the receiving unit 120 of the terminal 10 receives a signal including a PRACH configuration index transmitted from the base station 20. The control unit 130 of the terminal 10 configures the preamble format corresponding to the value of the PRACH configuration index received by the receiving unit 120, the frequency of the preamble transmission intervals random access and a subframe number including a random access preamble transmission interval. The transmission unit 110 of the terminal 10 transmits the random access preamble to the base station 20 in accordance with the random access configuration configured by the control unit 130.

[0103] For example, the receiving unit 120 of the terminal 10 receives a signal including a PRACH configuration index transmitted from the base station 20. The receiving unit 120 of the terminal 10 receives an additional signal including a subframe number defining a random access preamble transmission interval. The control unit 130 of the terminal 10 configures a preamble format corresponding to the value of the received PRACH configuration index and the random access preamble transmission interval periodicity. However, for random access preamble transmission intervals, the control unit 130 adjusts the subframe number specified by the additional signal received by the receiving unit 120.

[0104] For example, the receiving unit 120 of the terminal 10 receives a signal including a PRACH configuration index transmitted from the base station 20. The receiving unit 120 of the terminal 10 receives an additional signal including an offset between the subframe number specified by the PRACH configuration index received by the unit 120 reception, and the number of the subframe in which the random access preamble can actually be transmitted. The control unit 130 of the terminal 10 configures a preamble format corresponding to the value of the received PRACH configuration index and the random access preamble transmission interval periodicity. However, for random access preamble transmission intervals, the control unit 130 adjusts the subframe number specified by the additional signal received by the receiving unit 120.

[0105] 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. The receiving unit 120 of the terminal 10 receives an additional signal including a subframe number defining a random access preamble transmission interval. The control unit 130 of the terminal 10 configures the preamble format specified by the standard PRACH configuration index corresponding to the value of the alternative PRACH configuration index received by the receiving unit 120 and the periodicity of the random access preamble transmission intervals. However, for random access preamble transmission intervals, the control unit 130 adjusts the subframe number specified by the additional signal received by the receiving unit 120.

[0106] 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. The receiving unit 120 of the terminal 10 receives an additional signal including an offset between a subframe number specified by a standard PRACH configuration index, corresponding to the value of the alternative configuration index of the alternative PRACH received by the reception unit 120 and the number of the subframe in which the random access preamble can actually be transmitted. The control unit 130 of the terminal 10 configures the preamble format specified by the standard PRACH configuration index corresponding to the value of the alternative PRACH configuration index received by the receiving unit 120, and the periodicity of the random access preamble transmission intervals. However, for random access preamble transmission intervals, the control unit 130 adjusts the subframe number specified by the additional signal received by the receiving unit 120.

[0107] 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 this case, the control unit 130 of the terminal 10 configures the preamble format, the random access preamble transmission interval periodicity, and the subframe number as a random access preamble transmission interval corresponding to the PRACH configuration index value received by the receiving unit 120.

[0108] For example, a first table including a first set of standard PRACH configuration indices and a second table including a second set of PRACH configuration indices corresponding to the first set of standard PRACH configuration indices but indicating a subframe number other than those may be defined. , which are specified in the first set of standard PRACH configuration indexes, as the subframe number in which the random access preamble can be transmitted. In this case, for example, the receiving unit 120 of the terminal 10 receives a signal including one of the PRACH configuration indexes of the second set transmitted from the base station 20. The control unit of the terminal 10 configures the preamble format, the random access preamble transmission interval periodicity, and the subframe number as a random access preamble transmission interval corresponding to the value of any of the PRACH configuration indexes of the second set received by the receiving unit 120.

[0109] The receiving unit 120 of the terminal 10 receives information indicating the offset applied to the subframe number, and the control unit 130 of the terminal 10 can apply the offset applied to the subframe number only to certain entries (for example, entries with indices 0 to 6) in the table RACH configurations.

[0110] The receiving unit 120 of the terminal 10 may receive a portion of the parameters communicated to the terminal 10 by the RACH configuration table through a separate RRC message. The control unit 130 of the terminal 10 may limit the applicable entries and/or tables for a portion of the parameters separately reported using RRC.

[0111] The transmission unit 110 of the terminal 10 may report, as a possibility to the UE, whether the reported offset value can be applied to the subframe number of the RACH configuration table.

[0112] The transmission unit 110 of the terminal 10 may report, as a possibility to the UE, whether a function that is intended to be overwritten or modified can be applied to a portion of the parameters of the RACH configuration table separately reported by RRC corresponding to the portion of the parameters of the RACH configuration table.

<Base Station 20>

[0113] FIG. 22 is a diagram illustrating an example of a functional configuration of the base station 20. As shown in FIG. 22, the base station 20 includes a transmission unit 210, a receiving unit 220, and a control unit 230. The functional configuration shown in FIG. 22 is just an example. The functional division and names of the functional blocks may be any division and names as long as the operation according to the embodiments can be performed. It should be noted that the transmitting unit 210 may be referred to as a transmitter and the receiving unit 220 may be referred to as a receiver.

[0114] The receiving unit 210 includes a function for generating a signal to be transmitted to the terminal 10 and transmitting the signal via radio communication. The transmission unit 210 may generate one or more beams. The receiving unit 220 includes a function for receiving various signals transmitted from the terminal 10 and obtaining, for example, higher level information from the received signals. The receiving unit 220 includes a measurement unit that measures the received signal to obtain received power, etc.

[0115] The control block 230 controls the base station 20. A function of the control block 230 related to transmission may be included in the transmission block 210, and a function of the control block 230 related to reception may be included in the receiving block 220.

[0116] For example, the control unit 230 of the base station 20 selects a PRACH configuration index to indicate a random access configuration to be configured for the terminal 10. The transmission unit 210 of the base station 20 transmits a signal including the PRACH configuration index selected by the control unit 230, to the terminal 10. Additionally, when the subframe number indicating the transmission interval of the random access preamble configured by the PRACH configuration index to be transmitted to the terminal 10 is changed, the control unit 230 of the base station 20 generates information indicating the changed subframe number, and the transmission unit 210 transmits a signal including information indicating the changed subframe number to the terminal 10.

<Hardware configuration>

[0117] Block diagrams (FIG. 21 to FIG. 22) used to describe the above embodiments show blocks of functional units. These functional blocks (components) are implemented using any combination of at least one of hardware and software. In addition, the way each function block is implemented is not limited to special cases. That is, each functional block may be implemented using a single device that is physically or logically combined, or may be implemented by directly or indirectly connecting two or more devices that are physically or logically separated (e.g., by wire, radio, etc.). etc.) and the use of these multiple devices. The function block may be implemented by combining software with the above-described single apparatus or with the above-described multiple apparatuses. Functions include, but are not limited to: judging, deciding, determining, calculating, calculating, processing, inferring, examining, searching, checking, receiving, transmitting, inferring, accessing, resolving, selecting, selecting, ascertaining, compare, guess, wait, determine, broadcast, notify, transmit, forward, configure, reconfigure, allocate, match, assign, etc. For example, a functional block (component) that provides a transmission function is called a transmission block or transmitter. In any case, as described above, the implementation method is not limited to special cases.

[0118] For example, the terminal 10 and the base station 20 according to an embodiment of the present invention may function as a computer that performs processing in accordance with the present embodiment. FIG. 23 is a diagram illustrating an example of a hardware configuration of the terminal 10 and the base station 20 according to the present embodiment. The terminal 10 and base station 20 may each be configured as a computing device including, at a physical level, a processor 1001, a memory 1002, a storage device 1003, a communications device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0119] In the following description, the term "device" can be understood as a circuit, device, block, etc. The hardware configuration of the terminal 10 and base station 20 may be configured to include one or more of the devices indicated at 1001-1006 in the figure, or may be configured without some of the devices.

[0120] Each function of the terminal 10 and base station 20 is implemented by loading predefined software (program) onto hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculation and controls communication using communication device 1004, and, at least one of reading and writing data to memory 1002 and storage device 1003.

[0121] The processor 1001, for example, manages the operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with a peripheral device, a control device, a processing device, a register, etc.

[0122] Additionally, the processor 1001 reads a program (program code), program module, data, etc. from at least one of the storage device 1003 and the communication device 1004 to the memory 1002 and performs various processes in accordance therewith. The program is a program that causes a computer to perform at least a portion of the operations disclosed in the above-described embodiment. For example, the control unit 130 of the terminal 10 may be implemented by a control program that is stored in the memory 1002 and which is controlled by the processor 1001, and other functional blocks may be implemented in the same way. While the various processes disclosed above are described as being performed on a single processor 1001, they may be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented using one or more chips. The program can be transmitted from the network via a telecommunications line.

[0123] Memory 1002 is a computer-readable storage medium, and, for example, memory 1002 may be formed from at least one of read-only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), random access memory devices (RAM), etc. The memory 1002 may be referred to as a register, cache, main memory (main storage), etc. The memory 1002 may store a program (program code), a program module, etc., which may be executed to implement a radio communication method in accordance with one embodiment of the present disclosure.

[0124] The drive 1003 is a computer-readable storage medium and can be formed, for example, from at least one of the following: an optical disk such as a compact disc read-only memory (CD-ROM), a hard disk, a floppy disk, a magnetic-optical disk (e.g., CD, Digital Versatile Disc, Blu-ray Disc (registered trademark), smart card, flash memory (e.g., flash drive, key drive), floppy disk (registered trademark), magnetic strip, etc. The storage medium 1003 may be referred to as an auxiliary storage device.

[0125] 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 referred to, for example, as a network device, network controller, network card, module communications, etc. The communication device 1004 may be configured to include, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to implement at least one of Frequency Division Duplex (FDD) communications. Duplex) and duplex communication with time division (TDD, from the English Time Division Duplex).

[0126] Input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, or sensor) that receives external input. Output device 1006 is an output device (eg, a display, speaker, or LED lamp) that outputs to the outside. The input device 1005 and the output device 1006 may be configured as an integrated device (eg, a touch panel).

[0127] Each device, such as the processor 1001 and memory 1002, is also connected by a bus 1007 to transmit information. Bus 1007 may be formed from a single bus or may be formed from different buses for different devices.

[0128] Terminal 10 and base station 20 may each include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLU), and a field programmable gate array (FPGA, from English Field Programmable Gate Array), which can implement some or all functional blocks. For example, processor 1001 may be implemented using at least one of this hardware.

(Conclusion on the embodiments)

[0129] This specification at least discloses a terminal and a communication method described below.

[0130] The terminal includes a receiving unit configured to receive configuration information for transmitting a random access preamble; and a control unit configured to configure, when the two-stage random access procedure is applied, a temporary domain resource indicated by an index for the two-stage random access procedure included in the configuration information as a temporary domain resource for transmitting the random access preamble.

[0131] According to the configuration described above, when the two-step random access procedure is applied, the interference effect on another communication system caused by transmission of the random access preamble can be reduced.

[0132] The configuration information may include a flag value to indicate which of the first table and the second table is to be applied, and wherein, when the two-step random access procedure is applied, the control unit may apply one of the first table and the second table specified the value of the flag, and the control unit can select the temporary domain resource indicated by the index.

[0133] According to the above-described configuration, when the two-step random access procedure is applied, the interference effect on another communication system caused by transmission of the random access preamble can be reduced based on the indication of the flag value.

[0134] Each of the first table and the second table may be a table for selecting time domain resource configuration information for transmitting a random access preamble, and the second table may be obtained by expanding the first table, wherein the second table is expanded by adding information to the first table about the configuration of the temporary domain resource for transmitting the random access preamble.

[0135] When the two-step random access procedure is applied, the control unit can autonomously select a table from the first table and the second table, and the control unit can select the temporary domain resource indicated by the index when applying the selected table.

[0136] A communication method using a terminal includes the step of receiving configuration information to transmit a random access preamble; and a step of configuring, when the two-stage random access procedure is applied, a temporary domain resource indicated by an index for the two-stage random access procedure included in the configuration information as a temporary domain resource for transmitting the random access preamble.

[0137] According to the configuration described above, when the two-step random access procedure is applied, the interference effect on another communication system caused by transmission of the random access preamble can be reduced.

(Additional embodiments)

[0138] While embodiments of the present invention have been described above, the disclosed invention is not limited to the embodiments, and various changes, modifications, alternatives, substitutions, etc. will be apparent to those skilled in the art. The descriptions are given using specific numerical examples to facilitate understanding of the invention, but unless otherwise indicated, these values are merely examples and any suitable values may be used. The classification of elements in the above description is not essential to the present invention, and elements described in two or more elements can be used in combination as necessary, or elements described in one element can be applied (if not inconsistent) to elements described in another element. The boundaries of functional blocks or processing blocks in a functional block diagram do not necessarily correspond to the boundaries of physical components. An operation performed by a plurality of function blocks may be physically performed by a single component, or an operation performed by a single function block may be physically performed by a plurality of components. For the processing procedures described in the embodiment, the processing order may be changed as long as there is no discrepancy. For convenience in describing the process, the terminal 10 and base station 20 are described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. Software operating by a processor included in the terminal 10 according to embodiments of the present invention and software operating by a processor included in the base station 20 according to embodiments of the present invention may be stored in a random access memory (RAM). ), flash memory (RAM), read only memory (ROM), EPROM, EEPROM, register, hard disk drive (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium, respectively.

[0139] Notification of information is not limited to the aspects/embodiments disclosed in the specification, and notification of information may be made in another manner. For example, notification of the information may be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), higher layer signaling (e.g., radio resource control (RRC) signaling, media access control (MAC) signaling) , broadcast information (main information block (MIB), system information block (SIB)) or other signals or combinations thereof RRC signaling may be called an RRC message, for example, which may be an RRC connection setup message, an RRC connection reconfiguration message. etc.

[0140] Aspects/embodiments disclosed in this specification may be applied to a system using at least one of Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, Advanced IMT Scheme (IMT-Advanced), 4th Generation Mobile Communications System (4G), 5th Generation Mobile Communications System (5G), Future Radio Access (FRA) Scheme, W-CDMA (Registered Trademark), GSM (Registered Trademark) sign), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (Registered Trademark)), IEEE 802.16 (W1MAX (Registered Trademark)), IEEE 802.20, UWB (Ultra Wideband ), Bluetooth (registered trademark), any other suitable system and the next generation system expanded on the above systems. Additionally, multiple systems may be combined for use (eg, a combination of at least one of LTE and LTE-A and 5G).

[0141] Processing procedures, sequences, flowcharts, etc. according to each aspect/embodiment disclosed in this specification, may be rearranged provided there is no conflict therewith. For example, the methods disclosed herein present the elements of the various steps in an exemplary order and are not limited to the particular order presented.

[0142] The particular operation disclosed in this description that is to be performed by the base station 20 may, in some cases, be performed by a higher node. It will be appreciated that in a network consisting of one or more network nodes having base stations 20, various operations performed to communicate with a terminal may be performed by at least one of the base stations 20 and network nodes other than the base stations 20 (e.g. MME or S-GW may be considered, however, the network node is not limited to this). An example case is given above in which there is one network node other than the base station 20. However, the network node other than the base station 20 may be a combination of many other network nodes (eg, MME and S-GW).

[0143] Input and output information may be stored in a specific location (eg, memory) or controlled using control tables. Input and output information can be overwritten, updated, or added. Output information may be deleted. Input information can be transferred to another device.

[0144] The determination can be made using a value (0 or 1) represented by 1 bit, using a true or false value (Boolean value: true or false), or by comparing numeric values (for example, comparison with a given value).

[0145] Aspects/embodiments disclosed in this specification may be used alone, in combination, or switched during execution. Notice of this information (eg notice "X") may also be given by inference (eg "no notice of this information") rather than explicitly.

[0146] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or any other name, should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subroutines, program modules, applications, software applications, software packages, algorithms, subalgorithms, objects, executable files, executable threads, procedures, functions, etc.

[0147] Software, instructions, information, etc. can also be sent and received through a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, digital subscriber line) and wireless technology (infrared, microwave, etc.) .d.), at least one of wired technology and wireless technology is included in the definition of transmission media.

[0148] The information, signals, etc. disclosed in this specification may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0149] Terms disclosed in this specification and terms that are necessary to understand this specification may be replaced by terms having the same or similar meanings. For example, at least one of the channels and symbols may be a signal. The signal may be a message.

[0150] In the context of this description, the terms "system" and "network" are used interchangeably. The information, parameters, etc. disclosed herein may also be expressed using absolute values, relative values from specified values, or they may be expressed using corresponding separate information. For example, radio resources may be resources designated by an index.

[0151] The name used for the parameters described above is in no way restrictive. In addition, the mathematical equations using these parameters may differ from those expressly disclosed in this specification. Since the various channels (eg, PUCCH or PDCCH) and information elements can be identified by any suitable name, the different names assigned to these various channels and information elements are in no way limiting.

[0152] In this description, the terms "base station", "radio base station", "fixed station", "NodeB", "eNodeB(eNB)", "gNodeB (gNB)", "access point", "transmission point", “reception point”, “transmission/reception point”, “cell”, “sector”, “cell group”, “carrier”, “component carrier”, etc. can be used interchangeably. Base stations may be referred to in terms such as macro cells, small cells, femto cells, pico cells, etc.

[0153] The base station may accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station may be divided into many smaller areas, each smaller area may also provide communication services through a base station subsystem (eg, a small indoor base station (RRH) or a remote radio head). The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in the specified coverage area.

[0154] In this disclosure, terms such as “mobile station (MS),” “user terminal,” “user equipment (UE),” “terminal,” etc. ., can be used interchangeably.

[0155] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile installation, subscriber installation, wireless installation, remote installation, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, telephone, user agent, mobile client, client, or some other suitable term.

[0156] At least one of a base station and a mobile station may be referred to as a transmitter, a receiver, a communication device, etc. At least one of the base station and the mobile station may be a device installed in the mobile object, by the mobile object itself, etc. The moving object may be a vehicle (eg, a car or aircraft), an unmanned mobile device (eg, an unmanned aerial vehicle or automated vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station 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 be an Internet of Things (IoT) device, such as a sensor.

[0157] In addition, a base station in the present disclosure may be interpreted as a user terminal. For example, various aspects/embodiments of the present disclosure may be applied to a configuration in which communication between base stations and user terminals is replaced by communication between multiple user terminals (eg, may be referred to as Device-to-Device (D2D). Device) or “Vehicle-to-Everything” (V2X, from the English Vehicle-to-Everything)). In this case, the configuration may be such that the above-described function of the base station 20 is included in the user terminal 10. The terms "upstream" and "downstream" can also be replaced by terms corresponding to communication between terminals (eg, "direct"). For example, an uplink channel, a downlink channel can be replaced with a forward channel.

[0158] Likewise, a user terminal in the present disclosure may be interpreted as a base station. In this case, the configuration may be such that the above-described function of the user terminal 10 is included in the base station 20.

[0159] The terms "connected" or "coupled" or any variant thereof mean any direct or indirect connection or connection between two or more elements and may include the presence of one or more intermediate elements between the two elements "connected" or "coupled" together. The connection or connection between elements can be physical, logical, or a combination of both. For example, "connection" can be replaced with "access". In the context of 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 a number of non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region and light region (both visible and invisible).

[0160] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot signal, depending on the applicable standards.

[0161] In the context of this disclosure, the expression “based on” does not mean “based on only” unless otherwise indicated. In other words, the term “based on” means both “based on only” and “at least based on.”

[0162] When the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term “comprising.” Moreover, the term "or" as used in this disclosure is not intended to denote exclusive "OR".

[0163] A radio frame may be formed from one or more time domain frames. In the time domain, each of one or more frames may be referred to as a subframe. A subframe may be further formed from one or more slots in the time domain. Additionally, a subframe may be a fixed duration of time (eg, 1 ms) that is independent of numerology.

[0164] Numerology may be a communication parameter applied to at least one of transmitting or receiving a signal or channel. The numerology may represent, for example, at least one of SubCarrier Spacing, bandwidth, symbol length, cyclic prefix length, TTI, number of symbols per TTI, radio frame configuration, a particular filtering process performed by a frequency domain transceiver, a specific windowing process performed by a time domain transceiver, etc.

[0165] A slot may be formed in the time domain from one or more symbols (OFDM symbols) or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols. .Single Carrier Frequency Division Multiple Access)). A slot can be a unit of time based on numerology.

[0166] A slot may include multiple mini-slots. In the time domain, each mini-slot can be formed from one or more symbols. A mini-slot may be called a sub-slot. A mini-slot may be formed from fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit that is larger than a mini-slot may be referred to as a type A PDSCH (or PUSCH) mapping. A PDSCH (or PUSCH) transmitted with using a mini-slot may be referred to as a Type B PDSCH (or PUSCH) mapping.

[0167] Each of a radio frame, a subframe, a slot, a mini-slot, and a symbol represents a unit of time for transmitting a signal. Radio frame, subframe, slot, mini-slot and symbol may be referred to by various names accordingly.

[0168] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a "TTI", or one slot or one mini-slot may be referred to as a "TTI". Namely, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, may be a time slot shorter than 1 ms (e.g., 1 to 13 symbols), or a time slot longer than 1 ms. It should be noted that that the unit representing the TTI may be referred to as a "slot", "minislot" or the like, instead of the term "subframe".

[0169] Here, TTI refers to, for example, the minimum unit of scheduling time in radio communications. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency band or transmission power that can be used in each terminal 10) in TTI units for each terminal 10. It should be noted that the definition of TTI is not limited to this.

[0170] A TTI may be a unit of transmission time, such as a packet of channel-encoded data (transport block), code block, or codeword, or may be a processing unit for link scheduling or adaptation. It should be noted that when a TTI is provided, the time interval (eg, symbol number) to which a transport block, code block, or codeword is actually mapped may be shorter than the TTI.

[0171] It should be noted that when one slot or one mini-slot is referred to as a "TTI", one or more TTIs (i.e., one or more slots or one or more mini-slots) may represent a minimum unit of scheduling time . In addition, the number of slots (number of mini-slots) forming the minimum unit of scheduling time can be adjusted.

[0172] A TTI with a time duration of 1 ms may be referred to as a standard TTI (TTI in LTE version 8-12), regular TTI, long TTI, standard subframe, regular subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be referred to as a short TTI, short TTI, partial TTI (or fractional TTI), short subframe, short subframe, minislot, subslot, slot, etc.

[0173] It should be noted that a long TTI (eg, regular TTI, subframe, etc.) may be replaced by a TTI with a time duration greater than 1 ms, and a short TTI (eg, short TTI, etc.) may be replaced by a TTI with a TTI duration shorter than the TTI duration of the long TTI and greater than or equal to 1 ms.

[0174] A resource block (RB) is a block for allocating time domain and frequency domain resources and may include one or more successive frequency domain subcarriers. The number of subcarriers included in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in the RB may be determined based on the numerology.

[0175] Additionally, a resource block may include one or more time domain symbols and may be one slot, one mini-slot, one subframe, or one TTI in length. Each of one TTI and one subframe may be formed from one or more resource blocks.

[0176] It should be noted that one or more RBs may be referred to as a physical resource block (PRB), a sub-Carrier Group (SCG), a resource element group (REG). Resource Element Group), PRB pair, RB pair, etc.

[0177] Additionally, a resource block may be formed from one or more resource elements (RE, from the English Resource Element). For example, 1 RE may represent a radio resource area of 1 sub-carrier and 1 symbol.

[0178] A Bandwidth Part (BWP) (which may also be called a partial bandwidth, etc.) may represent, in a particular carrier, a subset of consecutive common RBs (common resource blocks) for a particular numerology. Here, the common RB may be indicated by the RB index when the common carrier reference point is used as the reference. The PRB may be defined in the BWP and may be numbered in the BWP.

[0179] The BWP may include an uplink BWP (UL BWP) and a downlink BWP (DL BWP). For a UE, one or more BWPs may be configured within a single carrier.

[0180] At least one of the configured BWPs may be active, and the UE may not assume that a given signal/channel is being transmitted outside the active BWP. It should be noted that "cell", "carrier", etc. may be replaced by "BWP" in this disclosure.

[0181] The structures of the above-described radio frame, subframe, slot, mini-slot, symbol, etc. are merely illustrative. For example, the following configurations can be changed in various ways: the number of subframes included in the radio frame; number of slots per subframe or per radio frame; number of mini-slots included in the slot; number of symbols and RBs included in the slot or mini-slot; number of subcarriers included in the RB; and the number of characters, character length, length of the cyclic prefix (CP, from the English Cyclic Prefix), etc. within TTI.

[0182] In the present disclosure, where nouns are used in the singular, the disclosure may imply the plural of said nouns.

[0183] In the present invention, the phrase "A and B are different" may mean "A and B are different from each other." It should be noted that this term can mean "A and B are different from C." Terms such as "separated" or "combined" can be interpreted similarly to the term "different".

[0184] Although the present invention has been described in detail above, those skilled in the art will appreciate that the invention is not limited to the embodiments described herein. The present invention is subject to modifications and variations without departing from the spirit and scope of the present invention as defined by the scope of the claims. Accordingly, the description is provided for purposes of illustration and is not intended to be in any way limiting with respect to the present invention.

[0185] This international patent application is based on and claims priority to Japanese Patent Application No. 2019-189452, filed on October 16, 2019. The entire contents of Japanese Patent Application No. 2019-189452 are incorporated herein by reference.

LIST OF POSITIONS

[0186] 10 Terminal

110 Transfer block

120 Reception block

130 Control unit

20 Base station

210 Transfer block

220 Reception block

230 Control unit

1001 Processor

1002 Memory

1003 Storage

1004 Communication device

1005 Input device

1006 Output device.

Claims (19)

1. Communication terminal containing: a receiving unit configured to receive an index for transmitting a random access preamble; And a control unit configured, when the two-stage random access procedure is applied, to configure a temporary domain resource indicated by an index for the two-stage random access procedure included in said index as a temporary domain resource for transmitting a random access preamble, wherein said index includes an additional index that is an index for a two-stage random access procedure, wherein the additional index is indicated by an index with a value greater than or equal to 256, wherein the index with a value greater than or equal to 256 is included in the RACH-ConfigGeneric information element specified for the two-stage random access procedure. 2. A method of communication using a terminal, containing: receiving an index for transmitting a random access preamble; And when the two-stage random access procedure is applied, configuring the temporary domain resource indicated by the index for the two-stage random access procedure included in the specified index as the temporary domain resource for transmitting the random access preamble, wherein said index includes an additional index that is an index for a two-stage random access procedure, wherein the additional index is indicated by an index with a value greater than or equal to 256, wherein the index with a value greater than or equal to 256 is included in the RACH-ConfigGeneric information element specified for the two-stage random access procedure. 3. Communication system containing: terminal; And base station wherein the terminal includes: a receiving unit configured to receive an index for transmitting a random access preamble; And a control unit configured, when the two-stage random access procedure is applied, to configure a temporary domain resource indicated by an index for the two-stage random access procedure included in said index as a temporary domain resource for transmitting a random access preamble, wherein said index includes an additional index that is an index for the two-stage random access procedure, wherein the additional index is indicated by an index with a value greater than or equal to 256, wherein the index with a value greater than or equal to 256 is included in the RACH-ConfigGeneric information element specified for the two-stage random access procedure, and wherein the base station is configured to transmit said index to the terminal for transmitting the random access preamble.