WO2019244308A1 - User terminal - Google Patents

Abstract

A user terminal that comprises: a transmission unit that transmits signals that have been mapped onto allocatable frequency resources in an established uplink channel bandwidth; and a control unit that controls the mapping of the signals onto the allocatable frequency resources. Frequency resources for extensions that result from an established transmission bandwidth being extended in the channel bandwidth are included the allocatable frequency resources.

Description

User terminal

The present disclosure relates to a user terminal.

In a UMTS (Universal Mobile Telecommunication System) network, a long term evolution (LTE: Long Term Evolution) has been specified for the purpose of higher data rates and lower delays (Non-Patent Document 1). Further, for the purpose of further increasing the bandwidth and speed from LTE, a successor system to LTE is also being studied. Successor systems to LTE include, for example, LTE-A (LTE-Advanced), FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (5G plus), and New-RAT (Radio Access Technology) (NR). ), Etc. (Non-Patent Document 2).

3GPP TS 36.101 v15.2.0, “Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception (Release 15),” March 2018 3GPP TS 38.101-1 v15.1.0 “NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone (Release 15),” March 2018

The transmission bandwidth in the predetermined channel bandwidth can be expanded by suppressing out-of-band leakage power of the transmission waveform by, for example, Windowing and / or filtering.

の 一 One aspect of the present disclosure provides a user terminal capable of expanding a transmission bandwidth in a predetermined channel bandwidth.

A user terminal according to one aspect of the present disclosure, a transmitting unit that transmits a signal mapped to an assignable frequency resource in a predetermined uplink channel bandwidth, and controls mapping of the signal to the assignable frequency resource. Here, the assignable frequency resource includes a control unit including a frequency resource of an extension part obtained by extending a predetermined transmission bandwidth in the channel bandwidth.

According to an aspect of the present disclosure, it is possible to expand a transmission bandwidth in a predetermined channel bandwidth.

FIG. 1 is a diagram illustrating a configuration example of a wireless communication system according to one embodiment. FIG. 2 is a diagram illustrating a configuration example of a transmitter according to one embodiment. FIG. 2 is a diagram illustrating a configuration example of a receiver according to one embodiment. FIG. 3 is a diagram illustrating a relationship between a channel bandwidth and a transmission bandwidth. FIG. 3 is a diagram illustrating the number of RBs (Resource @ Block) included in a channel bandwidth in LTE. It is a figure which shows the relationship of the number of RB included in a channel bandwidth in NR (Frequency {Range} 1). FIG. 3 is a diagram illustrating an example of a resource grid having existing RBs and extended RBs. FIG. 11 is a diagram illustrating an example of index assignment to RBs according to index method 1. FIG. 13 is a diagram illustrating a first example of index assignment to RBs according to index method 2. FIG. 14 is a diagram illustrating a second example of assigning indexes to RBs according to the index method 2. FIG. 3 is a diagram illustrating a configuration example of a wireless communication system that applies an extended RB to a DL signal. It is a figure which shows an example of the resource grid regarding PDSCH (Physical @ Downlink @ Shared @ Channel) use of extended RB. FIG. 3 is a diagram illustrating an example of sequence-resource mapping of DMRS (Demodulation Reference Signal) and CSI-RS (Channel State Information-Reference Signal). FIG. 9 is a diagram illustrating an example of CRS sequence-resource mapping. FIG. 3 is a diagram illustrating a configuration example of a wireless communication system that applies an extended RB to a UL signal. It is a figure which shows an example of the resource grid regarding PUSCH use of an extended RB. It is a figure which shows an example of the resource grid regarding PUCCH (Physical @ Uplink | Control @ Channel) use of extended RB. FIG. 11 is a diagram illustrating a first example of index assignment to a PUCCH of an extended RB. FIG. 15 is a diagram illustrating a second example of assigning an index to a PUCCH of an extended RB. FIG. 2 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to the present disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

(One embodiment)
<Configuration of wireless communication system>
FIG. 1 shows a configuration example of a wireless communication system according to an embodiment.

As shown in FIG. 1, the wireless communication system 1 includes a wireless base station (hereinafter, referred to as “base station”) 10 and a user terminal (hereinafter, referred to as “terminal”) 20. The terminal 20 is connected to the base station 10.

The base station 10 transmits a DL (Downlink) signal 30 to the terminal 20. The DL signal 30 includes, for example, a DL data signal (for example, PDSCH (Physical Downlink Shared Channel)) and a DL control signal (for example, PDCCH (Physical Downlink Control Channel)).

The terminal 20 transmits an UL (Uplink) signal 40 to the base station 10. The UL signal 40 includes, for example, an UL data signal (for example, PUSCH (Physical Uplink Shared Channel)) and an UL control signal (for example, PUCCH (Physical Uplink Control Channel)).

<Configuration of transmitter>
FIG. 2 is a diagram illustrating a configuration example of a transmitter according to one embodiment. The transmitter 100 of the base station 10 transmits the DL signal 30. The transmitter 100 of the terminal 20 transmits the UL signal 40.

Transmitter 100 shown in FIG. 2 includes control section 101, generation section 102, DFT (Discrete Fourier Transform) section 103, mapping section 104, IFFT (Inverse Fast Fourier Transform) section 105, and CP (Cyclic Prefix). It has an insertion unit 106, a transmission unit 107, and an antenna 108. The DFT section 103, the mapping section 104, the IFFT section 105, and the CP inserting section 106 generate an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

The control unit 101 controls the generation unit 102 and the mapping unit 104. For example, the control unit 101 in the transmitter 100 of the base station 10 performs scheduling (resource allocation and the like) of each terminal 20 and controls the generation unit 102 and the mapping unit 104 based on the scheduling.

The generation unit 102 generates a time-domain signal by allocating a signal to be transmitted to the receiver 200 to the time domain of the radio resource based on the control from the control unit 101, and sends the generated time-domain signal to the DFT unit 103. Output.

DFT section 103 performs discrete Fourier transform on the time-domain signal subjected to the serial-parallel conversion, and outputs the obtained frequency-domain signal to mapping section 104.

Mapping section 104 maps the frequency domain signal output from DFT section 103 to a plurality of subcarriers based on control from control section 101, and assigns 0 to subcarriers other than the subcarrier to which the frequency domain signal is mapped. Is mapped. Then, mapping section 104 outputs the mapped frequency domain signal to IFFT section 105.

IFFT section 105 performs an inverse fast Fourier transform on the frequency domain signal output from mapping section 104 and outputs the obtained time domain signal to CP insertion section 106.

CP inserting section 106 inserts a CP into the time-domain signal output from IFFT section 105 and outputs the result to transmitting section 107.

Transmitting section 107 performs RF (Radio Frequency) processing such as D / A (Digital-to-Analog) conversion, up-conversion, and amplification on the time-domain signal output from CP inserting section 106, and transmits antenna 108. The wireless signal is transmitted to the receiver 200 via the wireless communication device.

<Receiver configuration>
FIG. 3 is a diagram illustrating a configuration example of a receiver according to one embodiment. The receiver 200 of the terminal 20 receives the DL signal 30. The receiver 200 of the base station 10 receives the UL signal 40.

3 includes a control unit 201, an antenna 202, a receiving unit 203, a CP removing unit 204, an FFT (Fast Fourier Transform) unit 205, a demapping unit 206, and an IDFT (Inverse Discrete Fourier). Transform) unit 207 and an extraction unit 208. Note that OFDM symbols are extracted by CP removing section 204, FFT section 205, demapping section 206, and IDFT section 207.

The control unit 201 controls the demapping unit 206 and the extraction unit 208.

無線 The radio signal received by the antenna 202 is input to the receiving unit 203. The receiving unit 203 performs RF processing such as amplification, down-conversion, A / D (Analog-to-Digital) conversion, and the like on the radio signal received by the antenna 202, and converts the baseband time-domain signal into a CP removing unit. Output to 204.

CP removing section 204 removes the CP of the time-domain signal output from receiving section 203 and outputs the result to FFT section 205.

FFT section 205 performs fast Fourier transform on the time-domain signal output from CP removing section 204 and outputs the obtained frequency-domain signal to demapping section 206.

The demapping section 206 selects a target subcarrier for the signal output from the FFT section 205 based on the control from the control section 201, thins out unnecessary subcarriers, and converts the frequency domain signal into an IDFT signal. Output to the unit 207.

IDFT section 207 performs discrete inverse Fourier transform on the frequency domain signal output from demapping section 206 to obtain a time domain signal. IDFT section 207 outputs this time domain signal to extraction section 208.

The extraction unit 208 extracts a target signal from the time-domain signal based on the control from the control unit 201.

<Relationship between channel bandwidth and RB>
FIG. 4 is a diagram illustrating a relationship between a channel bandwidth and a transmission bandwidth. Note that the channel bandwidth may be called a system bandwidth.

As shown in FIG. 4, the transmission bandwidth is provided in the channel bandwidth. The transmission bandwidth is constituted by N _RB RBs. Some RBs in the transmission bandwidth are used for signal transmission. Further, a guard band exists outside the transmission bandwidth. The guard band may be asymmetric.

FIG. 5 is a diagram illustrating the number of _RBs (N _RB ) included in the channel bandwidth in LTE. The values shown in FIG. 5 are values when the subcarrier interval (SCS) is 15 kHz and the number of subcarriers per RB is 12. FIG. 6 is a diagram showing the relationship between the number of RBs included in the channel bandwidth in NR (Frequency Range 1 (450 MHz-6.0 GHz)).

As shown in FIG. 5, in LTE, N _RB = 50 when the channel bandwidth is “10 MHz”. Similarly, N _RB = 75 when the channel bandwidth is “15 MHz”, and N _RB = 100 when the channel bandwidth is “20 MHz”.

On the other hand, in the NR, as shown in the row of SCS “15 kHz” in FIG. 6, N _RB = 52 when the channel bandwidth is “10 MHz”. This is two N _RBs greater than N _RB = 50 in the case of the LTE channel bandwidth “10 MHz” shown in FIG. Similarly, N _RB = 79 in the case of a channel bandwidth of “15 MHz” in NR is four more N _RBs than in the case of a channel bandwidth of “15 MHz” in LTE. Also, N _RB = 106 in the case of a channel bandwidth of “20 MHz” in NR has six more N _RBs than in the case of a channel bandwidth of “20 MHz” in LTE.

The reason that NR can use more RBs than LTE is that NR can perform processing such as Windowing and / or filtering, and can suppress out-of-band leakage power of a transmission waveform.

Therefore, in LTE, the base station 10 and the terminal 20 perform processing such as Windowing and / or filtering in the same manner as NR, thereby extending the transmission bandwidth in the DL signal 30 and / or the UL signal 40 and using the same. The number of possible RBs can be increased. However, in extending the transmission bandwidth, it is preferable to ensure backward compatibility of the existing LTE terminal.

Therefore, a wireless communication system that extends the transmission bandwidth and ensures backward compatibility of existing LTE terminals will be described below. In the following description, the RB of the original transmission bandwidth is referred to as “existing RB”. Further, the RB in the portion where the transmission bandwidth is extended is referred to as “extended RB”. An existing LTE terminal that does not support the use of the extended RB is called an “existing terminal”, and a terminal that supports the use of the extended RB is called an “extended terminal”.

<Extended RB>
FIG. 7 shows an example of a resource grid having existing RBs and extended RBs.

As shown in FIG. 7, the extended RB 400 may be extended to both ends of the transmission bandwidth of the existing RB 300. Hereinafter, the extended RB 400 extended to the lower frequency side than the existing RB 300 is conveniently referred to as “left extended RB”, and the extended RB 400 extended to a higher frequency than the existing RB 300 is conveniently referred to as “right extended RB”. .

Further, _{"N CRB"} the number of existing RB in the channel bandwidth, _{"N LRB"} the number of left extension RB in the channel bandwidth, expressed as _{"N RRB"} the number of right extension RB in the channel bandwidth.

For example, when the channel bandwidth is “10 MHz”, N _CRB = 50, N _LRB = 1, N _RRB = 1, and N _RB = N _CRB + N _LRB + N _RRB = 52.

For example, in the case of the channel bandwidth “15 MHz”, N _CRB = 75, N _LRB = 2, N _RRB = 2, and N _RB = N _CRB + N _LRB + N _RRB = 79.

For example, when the channel bandwidth is “20 MHz”, N _CRB = 100, N _LRB = 3, N _RRB = 3, and N _RB = N _CRB + N _LRB + N _RRB = 106.

N _LRB and N _RRB may be the same number. This can prevent the DC subcarrier (the center frequency of the channel bandwidth) from shifting. However, _NLRB and _NRRB need not be the same number. That is, the bandwidth by the left extended RB and the bandwidth by the right extended RB may be asymmetric.

When the extended RB 400 is provided, for example, index assignment to the existing RB 300 and the extended RB 400 in the RBG (Resource Block Group) or the subband (CSI) is performed by any of the following “index method 1” or “index method 2”. May be. The following “index method 1” or “index method 2” is an example of the channel bandwidth “20 MHz”. The index methods 1 and 2 can be applied to both cases where the extended RB 400 is applied to the UL signal 40 and cases where the extended RB 400 is applied to the DL signal 30 as described later.

<< Index method 1 >>
In the index method 1, the existing RB 300 and the extended RB 400 are put together, and an index is assigned in order from the end RB.

For example, as shown in FIG. 8A, the index m = 0 to 2 is assigned to the left extended RB 400A, the index m = 3 to 102 is assigned to the existing RB 300, and the index m = 103 to 105 is assigned to the right extended RB 400B.

As shown in the specification of 3GPP _{TS36.211, N RB} corresponds to the maximum 110. Therefore, when the index method 1 is adopted, there is no need to change the resource mapping. When the index method 1 is adopted, the index of the same RB may be different between the existing terminal and the extended terminal. Therefore, the base station 10 may perform scheduling or the like in consideration of this point.

<< Index method 2 >>
In the index method 2, the index of the existing RB 300 is added to the extended RB 400 in succession to the index of the existing RB 300 without changing the index of the existing RB 300.

For example, as shown in FIG. 8B, the index m = 0 to 99 of the existing RB 300 is left as it is, the index m = 100 to 102 following the existing RB 300 is added to the right extended RB 400B, and the index m following the left extended RB 400A is given. = 103 to 105.

Alternatively, as shown in FIG. 8C, the index m = 0 to 99 of the existing RB 300 is left as it is, the left extended RB 400A is given an index m = 100 to 102 following the existing RB 300, and the right extended RB 400B is followed by the index m = 103 to 105.

場合 When index method 2 is adopted, the same RB index is common to the existing terminal and the extended terminal. When index method 2 is adopted, VRB (Virtual @ RB) -PRB (Physical @ RB) mapping for resource mapping may be modified (added) as appropriate.

<< Notification of ability information and usage information >>
The extended terminal 20A may transmit (report) to the base station 10 information indicating that it has the extended RB use capability (hereinafter, referred to as “extended RB capability information”). This extended RB capability information may be transmitted by, for example, UE Capability Information in an RRC (Radio Resource Control) layer.

The base station 10 may notify the extension terminal 20A of information indicating whether extended RBs are used (hereinafter, referred to as “extended RB use information”). The extended RB use information may be notified to the extended terminal 20A by signaling (for example, RRC signaling). Thereby, the extension terminal 20A can determine whether or not the extension RB is used in the DL signal 30 and / or the UL signal 40.

<When extended RB is applied to DL signal>
Next, a case where the extended RB is applied to a DL signal will be described. By applying the extended RB to the DL signal, the frequency utilization efficiency, peak throughput, and / or PDSCH capacity of the DL signal are improved. However, as shown in FIG. 9, the base station 10 transmits the DL signal 30 not only to the extension terminal 20A but also to the existing terminal 20B. Therefore, even when the extended RB is applied to the DL signal 30, it is preferable that the backward compatibility of the existing terminal 20B is ensured. Therefore, a method of applying the extended RB to the DL signal so as to ensure backward compatibility of the existing terminal 20B will be described.

<< DL application method 1 of extended RB >>
The DL application method 1 of the extended RB will be described with reference to the resource grid of FIG.

In the DL application method 1 of the extended RB, the PDSCH can be mapped to the extended RB 410 in the DMRS-based transmission mode (Transmission Mode) “9” or “10”. This increases the PDSCH capacity.

In the existing LTE, the PDCCH, PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and CRS (Cell Specific Reference Signal) that are mapped to the DL control signal area 301 are not mapped to the extended RB 410. Good. This is because if the PDCCH, PCFICH, PHICH, and CRS are mapped to the extended RB 410, the existing terminal 20B may not be able to identify these DL control signals.

The extension terminal 20A may transmit (report) extended RB capability information indicating that the terminal has the PDSCH use capability of the extended RB 410 to the base station 10. Having the PDSCH use capability of the extended RB 410 means that the terminal 20 can specify the PDSCH mapped to the extended RB 410.

The base station 10 may determine, based on the received extended RB capability information, which terminal 20 has the PDSCH use capability of the extended RB 410 (that is, which terminal is the extended terminal 20A). . The base station 10 may notify the extended terminal 20A of extended RB use information indicating whether the extended RB 410 uses the PDSCH. By this notification, the extension terminal 20A can determine whether or not the PDSCH is mapped to the extension RB 410.

Further, the content notified by the PBCH (Physical Broadcast Channel) may be left as it is, and the extended RB use information may be individually notified to each extended terminal 20A. The extended RB usage information may include the number of extended RB410 _(number of _{N LRB} and _{N RRB)} is. Thereby, the extension terminal 20A can recognize whether or not the extension RB 410 is used and the number of the extension RB 410. Also, since the contents of the PBCH remain unchanged, the backward compatibility of the existing terminal 20B is ensured.

Note that supporting the transmission mode “9” or “10” may be one of the requirements for the terminal 20 to have the PDSCH use capability of the extended RB 410. Alternatively, supporting NR may be one of the requirements for the terminal 20 to have the PDSCH use capability of the extended RB 410.

ＤＭ DMRS and / or CSI-RS may be mapped to extended RB 410. However, the existing RB 310 maintains the existing DMRS and CSI-RS sequence-resource mapping. By maintaining the sequence-resource mapping of the existing DMRS and CSI-RS, the extension terminal 20A can use the DMRS and CSI-RS mapped to the extension RB 410 while ensuring backward compatibility of the existing terminal 20B. As described below, the existing sequence-resource mapping of DMRS and CSI-RS can be maintained.

　ここで、Ｎ_ＲＢ ^{ｍａｘ，ＤＬ}の最大長は１１０である。ＤＬ信号が拡張ＲＢ４１０によって拡張された場合であっても、Ｎ_ＲＢ ^{ｍａｘ，ＤＬ}は１１０以下であるので、式１はそのまま使用できる。 As shown in TS 36.211 Section 6.10.5.1, the reference signal sequence is defined by Equation 1 below.

Here, the maximum length of N _RB ^{max, DL} is 110. Even when the DL signal is extended by the extended _RB 410, since N _RB ^{max, DL} is 110 or less, Equation 1 can be used as it is.

As shown in TS 36.211 Section 6.10.5.2, the resource mapping of the reference signal sequence is defined by the following equation 2.

Even when the DL signal is extended by the extended RB 410, Equation 2 can be used as it is. For example, m 'is configured as shown in FIG.

<< DL application method 2 of extended RB >>
The DL application method 2 of the extended RB will be described with reference to the resource grid of FIG.

In the DL application method 2 of the extended RB, the PDSCH can be mapped to the extended RB 410 in the CRS-based transmission mode “3” or “4”. The mapping of the PCSCH to the extended RB 410 increases the PDSCH capacity.

DL control signals such as PDCCH, PCFICH, and PHICH need not be mapped to the extended RB 410. This is because if these DL control signals are mapped to the extended RB 410, the existing terminal 20B may not be able to identify these DL control signals.

CRS may be mapped to extended RB 410. However, the existing RB 310 maintains the existing CRS sequence-resource mapping. By maintaining the sequence-resource mapping of the existing CRS, the extension terminal 20A can use the CRS mapped to the extension RB 410 while ensuring backward compatibility of the existing terminal 20B. As described below, the existing sequence-resource mapping of the CRS can be maintained.

　ここで、Ｎ_ＲＢ ^{ｍａｘ，ＤＬ}の最大長は２２０である。ＤＬ信号が拡張ＲＢ４１０によって拡張された場合であっても、Ｎ_ＲＢ ^{ｍａｘ，ＤＬ}は２２０以下であるので、式３はそのまま使用できる。 As shown in TS 36.211 Section 6.10.1.1, the reference signal sequence is defined by the following Equation 3.

Here, the maximum length of N _RB ^{max, DL} is 220. Even when the DL signal is extended by the extended _RB 410, since N _RB ^{max, DL} is 220 or less, Equation 3 can be used as it is.

Also, as shown in TS 36.211 Section 6.10.1.2, resource mapping of a reference signal sequence is defined by the following equation 4.

Equation 4 can be used as is even when the DL signal is extended by the extended RB 410. For example, m 'is configured as shown in FIG.

The extended RB capability information described in the DL application method 1 and the extended RB capability information described in the DL application method 2 may be defined as different capability information (for example, as separate bits).

送信 Moreover, the transmission mode “3” or “4” or the transmission mode “9” or “10” in the above is an example. For example, supporting a certain transmission mode may be one of the requirements for the terminal 20 to have the PDSCH use capability of the extended RB. Alternatively, the transmission mode may not be one of the requirements for the terminal 20 to have the PDSCH use capability of the extended RB.

<< Summary when extended RB is applied to DL signal >>
The user terminal 20A according to an aspect includes a receiving unit that receives a signal mapped to a frequency resource that can be allocated in a predetermined downlink channel bandwidth, and a predetermined transmission band in the channel bandwidth for the frequency resource that can be allocated. And a control unit that controls reception by the receiving unit on the assumption that the frequency resources of the expanded part whose width has been expanded are included. According to the configuration of the user terminal 20A, the transmission bandwidth in the channel bandwidth of the DL signal is extended, and the capacity (for example, PDSCH capacity) related to the DL data signal can be extended.

<When extended RB is applied to UL signal>
Next, a case where the extended RB is applied to a UL signal will be described. By applying the extended RB to the UL signal, the frequency utilization efficiency, the peak throughput, the PUSCH capacity, and / or the PUCCH capacity in the UL signal are improved. However, as shown in FIG. 13, the base station 10 receives the UL signal 40 not only from the extension terminal 20A but also from the existing terminal 20B. Hereinafter, a method of applying the extended RB to the UL signal while ensuring backward compatibility of the existing terminal 20B will be described.

<<< Extended RB UL application method 1 >>>
The UL application method 1 of the extended RB will be described with reference to the resource grid of FIG.

In the 適用 extended RB UL application method 1, at least one of the PUSCH, DMRS, and SRS (SoundingoundReference Signal) can be mapped to the extended RB 420. This mapping increases the capacity of the PUSCH and the like.

The extension terminal 20A may transmit (report) the extension RB capability information indicating that the extension terminal 20A has at least one use capability of the PUSCH, the DMRS, and the SRS of the extension RB to the base station 10. Having at least one use capability of the PUSCH, DMRS, and SRS of the extended RB 420 means that the terminal 20 can map at least one of the PUSCH, the DMRS, and the SRS to the extended RB 420.

Based on the received extended RB capability information, the base station 10 determines which terminal 20 has at least one use capability of the PUSCH, DMRS, and SRS of the extended RB 420 (that is, which terminal 20 has the extended terminal 20A ) May be determined. The base station 10 may notify the extended terminal 20A of extended RB use information indicating whether at least one of the PUSCH, the DMRS, and the SRS for the extended RB 420 is used. Thereby, extended terminal 20A can determine whether or not at least one of PDSCH, DMRS, and SRS can be mapped to extended RB 420.

The base station 10 may cause the extension terminal 20A to map at least one of the PUSCH, DMRS, and SRS to the extension RB 420, and cause the existing terminal 20B to map the PUSCH, DMRS, and SRS to the existing RB 320.

Note that the extended RB capability information indicating that the extended RB 420 has at least one use capability of the PUSCH and the DMRS is different from the extended RB capability information indicating that the extended RB 420 has the SRS available capability. It may be defined as capability information (eg, as separate bits).

拡 張 Also, the extended RB use information indicating whether the extended RB 420 uses the PUSCH and DMRS and the extended RB use information indicating whether the extended RB 420 uses the SRS may be defined as different use information.

Also, the use of at least one of the PUSCH, DMRS, and SRS of the extended RB 420 may be limited to cells where there is no PUCCH. An example of a cell in which the PUCCH does not exist is SCell (Secondary Cell) at UL @ CA (Carrier Aggregation).

{Also, at least one use capability of the PUSCH, DMRS, and SRS of the extended RB 420 may be associated with a use capability of UL @ CA or a use capability of multi-cluster transmission. For example, the base station 10 having the use capability of UL @ CA or the use capability of multi-cluster transmission The terminal 20 also has the use capability of at least one of the PUCSH, DMRS, and SRS of the extended RB 420 (that is, the extended Terminal 20A). In this case, extended RB 420 can be used for PUSCH mapping even in a cell where PUCCH exists.

Further, the UL bandwidth (ul-Bandwidth) notified by SIB (System Information Block) 2 or RRC config common is kept existing, and the base station 10 transmits at least one of the PUSCH, DMRS, and SRS of the extended RB 420 Extended RB use information indicating the use or non-use may be individually transmitted (signaled) to each extended terminal 20A.

<<< Extended RB UL application method 2 >>>
With reference to the resource grid of FIG. 15, UL application method 2 of extended RB will be described.

In the UL application method 2, the PUCCH can be mapped to the extended RB 430. That is, the PUCCH capacity is extended by offloading the PUCCH to the extended RB 430. Also, by allowing the PUCCH to be mapped to the extended RB 430, PAPR (Peak to Average Power Ratio) can be suppressed.

{For example, as shown in FIG. 15, the extended RB 430 located in a frequency band outside the existing RB 330 to which the PUCCH of the existing terminal 20B is mapped is used for mapping the PUCCH of the extended terminal 20A.

The extension terminal 20A may transmit (report) extended RB capability information indicating that it has the PUCCH use capability of the extended RB 430 to the base station 10. Having the PUCCH use capability of the extended RB 430 means that the terminal 20 can map the PUCCH to the extended RB 430.

The base station 10 determines which terminal 20 has the PUCCH use capability of the extended RB 430 (that is, which terminal 20 is the extended terminal 20A) based on the received extended RB capability information. Good. The base station 10 may notify the extended terminal 20A of extended RB use information indicating whether the extended RB 430 uses the PUCCH. Thereby, extended terminal 20A can determine whether or not PUCCH can be mapped to extended RB 430.

Note that the extended RB capability information indicating at least one use capability of the PUSCH, DMRS, and SRS of the extended RB 420 described in the above-described UL application method 1, and the extended RB capability information indicating the PUCCH use capability of the extended RB 430 described in the above-described UL application method 2 RB capability information may be defined as different capability information (eg, as separate bits).

Also, the UL bandwidth (ul-Bandwidth) notified by SIB2 or RRC \ config \ common or the like remains the same, and the base station 10 transmits the extended RB use information indicating whether the extended RB 430 uses the PUCCH to each extended terminal. 20A may be individually transmitted (signaled).

Also, the index of the PUCCH resource may be specified by the following option 1 or 2.

(Option 1)
As shown in FIG. 16A, the extended terminal 20A or the base station 10 determines which of the existing RB 330 and the extended RB 430 is used based on the extended RB use information, and when the extended RB 430 is used, In the extended RB 430, similarly to the case of the existing RB 330, an index is assigned to the PUCCH resource. For example, as illustrated in FIG. 16A, when the extension terminal 20 </ b> A or the base station 10 determines that the extension RB 430 is used, in the extension RB 430, as in the case of the existing RB 330, the PUCCH resource has the index m = 0, 1, 2, and 3 are assigned.

(Option 2)
As illustrated in FIG. 16B, the extension terminal 20A or the base station 10 determines which of the existing RB 330 and the extension RB 430 is used based on the extension RB use information, and when the extension RB 430 is used, The RB 330 and the extended RB 430 are collectively assigned an index to the PUCCH resource. For example, as illustrated in FIG. 16B, when the extension terminal 20 </ b> A or the base station 10 determines that the extension RB 430 is used, the extension RB 430 and the extension RB 430 are put together, and the index m = 0, 1, 2, 3, 4, 5, 6, and 7 are given.

<< Summary of applying extended RB to UL signal >>
A user terminal 20A according to an aspect includes a transmitting unit that transmits a signal mapped to a frequency resource that can be allocated in a predetermined uplink channel bandwidth, and a control unit that controls mapping of the signal to a frequency resource that can be allocated. Is provided. Here, the frequency resources that can be assigned include the frequency resources (for example, extended RBs) of the extended part obtained by extending the predetermined transmission bandwidth in the channel bandwidth. According to the configuration of the user terminal 20A, the transmission bandwidth in the channel bandwidth of the UL signal is extended, and the capacity for the UL control signal (for example, the PUCCH capacity) or the capacity for the UL data signal (for example, the PUSCH capacity) can be expanded. .

<Modification>
The extended RB capability information described in “when extended RB is applied to DL signal” and the extended RB capability information described in “when extended RB is applied to UL signal” are defined as common capability information. Or may be defined as separate pieces of capability information.

The extended RB use information described in the case of applying the extended RB to the DL signal and the extended RB use information described in the case of applying the extended RB to the UL signal are defined as common use information. Or may be defined as separate usage information.

The embodiments of the present disclosure have been described above.

(Hardware configuration)
Note that the block diagram used in the description of the above-described embodiment shows blocks in functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, or two or more devices physically and / or logically separated from each other directly and / or indirectly. (For example, wired and / or wireless), and may be realized by the plurality of devices.

For example, the base station 10, the user terminal 20, and the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method according to the present disclosure. FIG. 17 is a diagram illustrating an example of a hardware configuration of the base station 10 and the user terminal 20 according to an embodiment of the present disclosure. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .

In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the base station and the user terminal may be configured to include one or more devices illustrated in the drawing, or may be configured not to include some devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or in another manner by one or more processors. Note that the processor 1001 may be implemented by one or more chips.

The functions of the base station and the user terminal are performed by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, whereby the processor 1001 performs an arithmetic operation and performs communication by the communication device 1004 or communication by the memory 1002. It is realized by controlling data read and / or write in the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the control units 101 and 201 described above may be realized by the processor 1001. Further, a necessary table may be stored in the memory 1002.

The processor 1001 reads out a program (program code), a software module, or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operation described in the above embodiment is used. For example, at least some of the functional blocks configuring the base station 10 and the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks are implemented in a similar manner. May be. Although it has been described that the above-described various processes are executed by one processor 1001, the processes may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented with one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one of, for example, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). May be done. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to execute the wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (eg, a compact disk, a digital versatile disk, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, or the like. The storage 1003 may be called an auxiliary storage device. The storage medium described above may be, for example, a database including the memory 1002 and / or the storage 1003, a server, or any other suitable medium.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission unit 107, the reception unit 203, the antennas 108 and 202, and the like described above may be realized by the communication device 1004.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input. The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

The devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured by a single bus, or may be configured by a different bus between devices.

In addition, the base station 10 and the user terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). Hardware, and some or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.

(Information notification, signaling)
Further, the notification of the information is not limited to the aspect / embodiment described in this specification, and may be performed by another method. For example, the notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, Broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof may be used. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

(Adaptive system)
Each aspect / embodiment described in this specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), The present invention may be applied to a system using Bluetooth (registered trademark), another appropriate system, and / or a next-generation system extended based on the system.

(Processing procedure, etc.)
The processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be interchanged as long as there is no inconsistency. For example, the methods described herein present elements of various steps in an exemplary order, and are not limited to the specific order presented.

(Operation of base station)
The specific operation described as being performed by the base station (wireless base station) in this specification may be performed by an upper node (upper node) in some cases. In a network consisting of one or more network nodes having base stations, various operations performed for communication with terminals can be performed by base stations and / or other network nodes other than base stations (eg, It is obvious that the processing can be performed by an MME (Mobility Management Entity) or an S-GW (Serving Gateway). In the above, the case where the number of other network nodes other than the base station is one is illustrated, but a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

(Direction of input / output)
Information and signals can be output from an upper layer (or lower layer) to a lower layer (or upper layer). Input and output may be performed via a plurality of network nodes.

(Handling of input / output information etc.)
The input and output information and the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information that is input and output can be overwritten, updated, or added. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

(Judgment method)
The determination may be made based on a value represented by 1 bit (0 or 1), a Boolean value (Boolean: true or false), or a comparison of numerical values (for example, a predetermined value). Value).

(software)
Software, regardless of whether it is called software, firmware, middleware, microcode, a hardware description language, or any other name, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

ソ フ ト ウ ェ ア Also, software, instructions, and the like may be transmitted and received via a transmission medium. For example, the software may use a wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a web site, server, or other using wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

(Information, signal)
The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of

用語 Note that terms described in the present specification and / or terms necessary for understanding the present specification may be replaced with terms having the same or similar meaning. For example, channels and / or symbols may be signals. Also, the signal may be a message. Further, the component carrier (CC) may be called a carrier frequency, a cell, or the like.

("System", "Network")
As used herein, the terms “system” and “network” are used interchangeably.

(Parameter, channel name)
Further, the information, parameters, and the like described in this specification may be represented by an absolute value, may be represented by a relative value from a predetermined value, or may be represented by another corresponding information. . For example, the radio resource may be indicated by an index.

名称 The names used for the above parameters are not limiting in any way. Further, the formulas and the like that use these parameters may differ from those explicitly disclosed herein. The various channels (eg, PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, so these various channels and information The various names assigned to the elements are not limiting in any way.

(base station)
A base station (wireless base station) can accommodate one or more (eg, three) (also referred to as sectors) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station RRH: Remote). Radio Head) can also provide communication services. The term "cell" or "sector" refers to a base station that provides communication services in this coverage and / or some or all of the coverage area of a base station subsystem. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, access point, femtocell, small cell, and the like.

(Terminal)
A user terminal can be a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile station, by a person skilled in the art. It may also be called a terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, a UE (User Equipment), or some other suitable terminology.

(Term meaning, interpretation)
The terms "determining" and "determining" as used herein may encompass a wide variety of operations. “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investing (investigating), searching (looking up) (for example, a table). , A search in a database or another data structure), ascertaining what is considered to be "determined", "determined", and the like. Also, “determining” and “determining” refer to receiving (eg, receiving information), transmitting (eg, transmitting information), input (output), accessing (accessing) (for example, accessing data in the memory) may be regarded as “determined” or “determined”. In addition, `` judgment '' and `` decision '' means that resolving, selecting, selecting, establishing, establishing, comparing, etc. are regarded as `` judgment '' and `` decided ''. May be included. That is, “judgment” and “decision” may include deeming any operation as “judgment” and “determined”.

The terms "connected," "coupled," or any variation thereof, mean any direct or indirect connection or coupling between two or more elements that It may include the presence of one or more intermediate elements between the two elements "connected" or "coupled." The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, two elements are defined by the use of one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-exhaustive examples, radio frequency By using electromagnetic energy, such as electromagnetic energy having wavelengths in the region, the microwave region and the light (both visible and invisible) region, it can be considered to be "connected" or "coupled" to each other.

The reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot depending on an applied standard. The correction RS may be called TRS (Tracking RS), PC-RS (Phase Compensation RS), PTRS (Phase Tracking RS), or Additional RS. Further, the demodulation RS and the correction RS may have different names corresponding to each other. Further, the demodulation RS and the correction RS may be defined by the same name (for example, a demodulation RS).

記載 The term “based on” as used herein does not mean “based solely” unless otherwise indicated. In other words, the description "based on" means both "based only on" and "based at least on."

「The“ unit ”in the configuration of each device described above may be replaced with“ means ”,“ circuit ”,“ device ”, and the like.

As long as “including”, “comprising”, and variations thereof, are used in the present description or claims, these terms are inclusive as well as the term “comprising” It is intended to be relevant. Further, it is intended that the term "or", as used herein or in the claims, not be the exclusive OR.

The radio frame may be composed of one or more frames in the time domain. One or more frames in the time domain may be referred to as subframes, time units, and so on. A subframe may further be composed of one or more slots in the time domain. A slot may further be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier-Frequency Division Division Multiple Access) symbol, etc.) in the time domain.

Radio frames, subframes, slots, and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, and symbols may have different names corresponding to each.

{For example, in the LTE system, the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each mobile station) to each mobile station. The minimum time unit of the scheduling may be called TTI (Transmission @ Time @ Interval).

{For example, one subframe may be called a TTI, a plurality of continuous subframes may be called a TTI, and one slot may be called a TTI.

The resource unit is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. Further, the time domain of the resource unit may include one or a plurality of symbols, and may have a length of one slot, one subframe, or one TTI. One TTI and one subframe may each be configured with one or a plurality of resource units. Further, the resource unit may be called a resource block (RB: Resource @ Block), a physical resource block (PRB: Physical @ RB), a PRB pair, an RB pair, a scheduling unit, a frequency unit, and a subband. Further, the resource unit may be composed of one or a plurality of REs. For example, one RE may be a resource (for example, a minimum resource unit) smaller than a resource unit serving as a resource allocation unit, and is not limited to the RE.

The above-described structure of the radio frame is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, the number of symbols and resource blocks included in the slot, and the number of subframes included in the resource block The number of carriers can be varied.

Throughout this disclosure, when articles are added by translation, e.g., a, an,, and the in English, unless the context clearly indicates otherwise, It shall include a plurality.

(Variations of aspects, etc.)
Each aspect / embodiment described in the present specification may be used alone, may be used in combination, or may be used by switching with execution. In addition, the notification of the predetermined information (for example, the notification of “X”) is not limited to explicitly performed, and is performed implicitly (for example, not performing the notification of the predetermined information). Is also good.

Although the present disclosure has been described above in detail, it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in this specification. The present disclosure can be implemented as modified and changed aspects without departing from the spirit and scope of the present disclosure defined by the description of the claims. Therefore, the description in this specification is for the purpose of illustration and description, and has no restrictive meaning to the present disclosure.

の 一 One embodiment of the present disclosure is useful for a wireless communication system.

Reference Signs List 10 radio base station 20 user terminal 20A extension terminal 20B existing terminal 30 DL signal 40 UL signal 100 transmitter 101 control unit 102 generation unit 103 DFT unit 104 mapping unit 105 IFFT unit 106 CP insertion unit 107 transmission unit 108, 202 antenna 200 reception Machine 201 control unit 203 reception unit 204 CP removal unit 205 FFT unit 206 demapping unit 207 IDFT unit 208 extraction unit

Claims (6)

A transmitting unit that transmits a signal mapped to a frequency resource that can be allocated in a predetermined uplink channel bandwidth,
Controlling the mapping of the signal to the allocable frequency resource, wherein the allocable frequency resource includes a frequency resource of an extended portion obtained by expanding a predetermined transmission bandwidth in the channel bandwidth; A control unit;
Comprising,
User terminal. The control unit includes:
Mapping a control channel signal to the frequency resources of the extension part,
The user terminal according to claim 1. A common index is assigned to the control channel signal mapped to the frequency resource of the extension part and the control channel signal mapped to the frequency resource of the predetermined transmission bandwidth.
Alternatively, a continuous index is assigned to a control channel signal mapped to a frequency resource of the extension part and a control channel signal mapped to a frequency resource of the predetermined transmission bandwidth.
The user terminal according to claim 2. The control unit includes:
Mapping at least one of a data channel signal, a demodulation reference signal of the data channel signal, and a sounding reference signal to the frequency resources of the extension part;
The user terminal according to claim 1. The control unit includes:
Do not map a control channel signal to frequency resources of the predetermined transmission bandwidth,
The user terminal according to claim 4. The control unit includes:
Controlling the process of transmitting to the base station capability information indicating that the user terminal has the ability to use the frequency resources of the extension part,
The user terminal according to claim 1.

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