JP2018064252A - User device and signal receiving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of flexibly setting resources of a control channel in consideration of user devices with various UE capabilities being accommodated.SOLUTION: A radio communication system includes a base station and a user device. The user device in the communication system includes: an acquisition unit for acquiring information indicating a control channel region set to a partial band of a maximum bandwidth, i.e. the maximum bandwidth that can be used for communication by the base station from the base station; and a receiving unit for receiving the control information by monitoring the control channel region indicated by information indicating the control channel region.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a user apparatus and a signal reception method.

  The LTE (Long Term Evolution) standard stipulates that the channel bandwidth that can be operated by the base station is one of six patterns in one carrier (single carrier). Specifically, six patterns of 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, and 20 MHz are defined (see Non-Patent Document 1).

  In 3GPP, in order to realize further increase in system capacity, further increase in data transmission rate, further reduction in delay in the radio section, etc., studies on a radio access technology called 5G are being promoted. (See Non-Patent Document 2).

3GPP TS36.104 V14.0.0 (2016-06) NTT DoCoMo, Inc., NTT DOCOMO Technical Journal "5G Wireless Access Technology", January 2016

  In the conventional LTE, when communication is performed with a bandwidth exceeding 20 Mhz, it is necessary to bundle a plurality of carriers using CA (Carrier Aggregation) or DC (Dual Connectivity). On the other hand, since 5G is assumed to start operation at a frequency different from that of conventional LTE, a single carrier (single carrier) has a wider channel bandwidth than LTE (for example, several hundred MHz to several GHz). Support is being considered. In 5G, it is considered to accommodate not only smartphones but also various UE (User Equipment) capability user devices such as IoT (Internet of Things) terminals in the same wireless network.

  Conventional LTE stipulates that user equipment should support at least the maximum channel bandwidth (20 MHz) according to the standard. However, in 5G, it is not practical to support the maximum channel bandwidth according to the standard for all user apparatuses. For example, a user apparatus that does not require high-speed communication, such as an IoT device, has a higher channel bandwidth than the standard (800 MHz in the example of FIG. 1) as shown in FIG. It is assumed that only a narrow bandwidth (in the example of FIG. 1, 100 MHz or less, 200 MHz or less) is supported.

  Here, the first problem will be described. As described above, when user apparatuses having various UE capabilities (UE Capability) are accommodated in a wide bandwidth wireless network, the amount of radio resources allocated to the shared data channel (PDSCH / PUSCH in LTE) is determined by each user apparatus. It increases according to the communication rate that can be processed. On the other hand, since the size of control information transmitted on the control channel (PDCCH / PUCCH in LTE) is not necessarily directly related to the communication rate that can be processed by each user apparatus, the amount of radio resources allocated to the control channel is determined as the communication rate. There is no need to increase it accordingly. Therefore, in 5G, it is considered desirable to flexibly set control channel resources in consideration of accommodating user apparatuses with various UE capabilities. However, in the current LTE specification, control channel resources are set for the entire band, and considering that UEs with various UE capabilities are accommodated in carriers having a wider bandwidth than LTE, A technology that allows flexible setting of resources is not defined.

  Next, the second problem will be described. In conventional LTE, one TB (when MIMO is not applied) is transmitted per 1 CC (Component Carrier) in 1 TTI, and thus HARQ (Hybrid Automatic Repeat Request) processing is performed for each CC. Specifically, in the case of single carrier operation (non-CA (Carrier Aggregation)), as shown in FIG. 2 (a), one TB is transmitted and received in 1 TTI, and each user apparatus and base station has one HARQ. TB transmission / reception processing was performed in the process. Also, when CA is performed, as shown in FIG. 2 (b), TB is transmitted / received in parallel for each CC in 1 TTI, so that the user apparatus and the base station transmit / receive TB in parallel through a plurality of HARQ processes. We were processing.

  Here, assuming the operation of a single carrier having a wider bandwidth than LTE while following the LTE mechanism, as shown in FIG. 2 (c), each of the user equipment and the base station has one HARQ. It is necessary to perform transmission / reception processing of a large size TB in the process. If a large size TB is to be handled by one HARQ process, the user apparatus and the base station must be equipped with a CPU having a high processing capacity, which may increase the apparatus cost. In order to solve such a problem, it is considered that it is desirable that the user apparatus and the base station perform TB transmission / reception processing in parallel even when operated by a single carrier. However, the current LTE specification does not stipulate a technology that can perform TB transmission / reception processing in parallel when operated on a single carrier.

  The disclosed technology has been made in view of the first problem in particular, and provides a technology that allows flexible setting of control channel resources in consideration of accommodating user devices with various UE capabilities. The purpose is to do.

  A user apparatus according to the disclosed technique is a user apparatus in a wireless communication system having a base station and a user apparatus, and includes a maximum bandwidth that is a maximum bandwidth that the base station can use for communication from the base station. An acquisition unit that acquires information indicating a control channel region set in a part of a band; and a reception unit that receives control information by monitoring the control channel region indicated by the information indicating the control channel region; Have.

  According to the disclosed technique, it is possible to flexibly set control channel resources in consideration of accommodating user apparatuses having various UE capabilities.

It is a figure which shows the relationship between the zone | band of a single carrier, and the zone | band which a user apparatus supports. It is a figure for demonstrating the subject which concerns on the transmission / reception process of TB. It is a figure which shows the structural example of the radio | wireless communications system which concerns on 1st embodiment. It is a sequence diagram which shows an example of the process sequence at the time of notifying a PDCCH area | region. It is a figure which shows the resource area | region which each UE uses in common. It is a figure which shows the example of a setting of the PDCCH area | region (the 1). It is a figure which shows the example of a setting of the PDCCH area | region (the 2). It is a figure which shows the example of a setting of the PDCCH area | region (the 3). It is a figure which shows the function structural example of the base station which concerns on 1st embodiment. It is a figure which shows the function structural example of the user apparatus which concerns on 1st embodiment. It is a figure which shows the transmission / reception method (the 1) of multiple TB. It is a figure which shows the specific example of the information contained in DCI. It is a figure which shows the transmission / reception method (the 2) of multiple TB. It is a figure which shows the specific example of the information contained in DCI. It is a sequence diagram which shows the process sequence at the time of notifying TB number per TTI. It is a figure which shows the function structural example of the base station which concerns on 2nd embodiment. It is a figure which shows the function structural example of the user apparatus which concerns on 2nd embodiment. It is a figure which shows the hardware structural example of the base station and user apparatus which concern on each embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment. For example, the wireless communication system according to the present embodiment assumes a system based on LTE (including 5G), but the present invention is not limited to LTE and can be applied to other systems. It is. In this specification and claims, unless otherwise specified, “LTE” is not only a communication method corresponding to Release 8 or 9 of 3GPP, but also Releases 10, 11, 12, 13, 3GPP. Alternatively, it is used in a broad sense including a fifth generation communication system corresponding to Release 14 or later.

  In the following description, terms such as PDCCH, PDSCH, PUSCH, PUCCH, SIB, RNTI, and DCI used in LTE are used, but these are only examples, and channels and signals having the same functions as these. Etc. may be referred to by other names.

  Hereinafter, the embodiment of the present invention will be described by dividing it into a first embodiment mainly corresponding to the first problem and a second embodiment mainly corresponding to the second problem. Note that the first embodiment and the second embodiment can be combined.

<< First Embodiment >>
<System configuration>
FIG. 3 is a diagram illustrating a configuration example of the wireless communication system according to the first embodiment. As illustrated in FIG. 3, the radio communication system according to the first embodiment includes a base station 10 and a user apparatus UE. In the example of FIG. 3, one base station 10 and one user device UE are illustrated, but a plurality of base stations 10 may be included, or a plurality of user devices UE may be included.

  The user apparatus UE is a terminal (MBB (Mobile Broadband) terminal) that frequently transmits and receives a large amount of data such as a smartphone, or a terminal (MTC (Machine Type Communication) that transmits and receives only a small amount of data at a low frequency such as an IoT device. In this embodiment, user devices UE of all types (UE categories) are included.

  The base station 10 communicates with the user apparatus UE via a radio bearer established with the user apparatus UE. The base station 10 may be referred to as “eNB (enhanced NodeB)”, “NR (New Radio) node”, “gNB”, “eLTE eNB (evolution LTE enhanced NodeB)”, and the like.

<Bandwidth overview>
As described above, since only six patterns are defined as channel bandwidths in LTE, the channel bandwidths supported in each of the user apparatus UE and the base station 10 are limited to these six patterns. On the other hand, in the radio communication system according to the first embodiment, a channel bandwidth of a limited pattern as in LTE is not provided, and each of the user apparatus UE and the base station 20 has a narrow bandwidth to an ultra wide bandwidth. An arbitrary bandwidth up to a width (for example, 5 GHz) can be supported. Here, the narrow bandwidth is, for example, the minimum scheduling unit of the wireless communication system in the first embodiment. This minimum scheduling unit may be, for example, 180 KHz which is a bandwidth of 1 RB (resource block) in LTE.

  In the first embodiment, the term “Available Maximum Bandwidth” representing the maximum bandwidth that the user apparatus UE / base station 10 can use for communication is used. The user apparatus UE / base station 10 can perform communication using a bandwidth having a bandwidth equal to or less than the maximum usable bandwidth.

  “Maximum usable bandwidth” may be referred to as “Transmission Bandwidth Configuration”. Further, a bandwidth obtained by adding guard bands on both sides of the “maximum usable bandwidth” may be referred to as a “channel bandwidth”. Further, the “maximum usable bandwidth” may be called “channel bandwidth”. In addition, the “maximum usable bandwidth” is set to “transmission bandwidth”, “reception bandwidth”, “transmission / reception bandwidth”, “maximum bandwidth”, “maximum transmission bandwidth”, “maximum reception bandwidth”, “ It may be replaced with either “maximum transmission / reception bandwidth” or “system bandwidth”. In addition, “maximum usable bandwidth” may be replaced with a name other than these.

  The maximum usable bandwidth may be interpreted as the maximum usable bandwidth of the DL, may be interpreted as the maximum usable bandwidth of the UL, or may be interpreted as the maximum usable bandwidth common to the DL and the UL (examples). : In the case of TDD).

<Processing procedure>
Subsequently, a processing procedure performed by the wireless communication system according to the first embodiment will be described. In the first embodiment, the user apparatus UE acquires information indicating a PDCCH region set in a part of the maximum usable bandwidth of the base station 10 from the base station 10, and indicates with the information. Control information is received by monitoring the PDCCH region to be transmitted. The “PDCCH region” intends a frequency resource range in which control information may be transmitted, or a radio resource surrounded by frequency resources and time resources in which control information may be transmitted. The “PDCCH region” may be referred to as “control channel region”, “control channel band”, “control channel resource”, or the like, or may be referred to by a name other than these.

  FIG. 4 is a sequence diagram illustrating an example of a processing procedure when notifying the PDCCH region. First, the user apparatus UE transmits UE capability information (UE Capability Information) indicating its own UE capability to the base station 10 (S11). Here, as shown in FIG. 5, the user apparatus UE has a radio resource area (hereinafter referred to as “common area”) in which all user apparatuses UE can transmit signals in common among the maximum usable bandwidth of the base station 10. UE capability information may be transmitted using a predetermined radio resource. The common area is a premise that all user apparatuses UE are set to a bandwidth capable of transmitting radio signals regardless of the UE capability of the user apparatus UE. The base station 10 recognizes the maximum usable bandwidth of the user apparatus UE that accesses the cell by receiving the UE capability information.

  Subsequently, the base station 10 notifies the user apparatus UE of information indicating the PDCCH region using broadcast information (SIB: System Information Block) or RRC signaling (S12). Thereafter, the user apparatus UE receives the control information addressed to itself by monitoring the PDCCH region.

(PDCCH region setting example)
[Setting example (1)]
FIG. 6 is a diagram illustrating a setting example (part 1) of the PDCCH region. In the setting example (part 1), the PDCCH region is set to the same bandwidth regardless of the UE capability of the user apparatus UE. The PDCCH region can be set at an arbitrary frequency position as long as it is within the maximum usable bandwidth of the base station 10. The base station 10 may set the position of the PDDCH region common to all user apparatuses UE, or may set the position of each user apparatus UE individually.

  The bandwidth of the PDCCH region is the maximum usable bandwidth of the user apparatus UE having the lowest UE capability among the user apparatus UE defined in the standard specification or the user apparatus UE whose base station 10 knows the UE capability. The following may be set. For example, as illustrated in FIG. 6, when there is UE # 1 whose maximum usable bandwidth is A and UE # 2 whose maximum usable bandwidth is B (where A <B), the PDCCH region May be set to a bandwidth equal to or less than the bandwidth A. Various parameters exist in the UE capability, but the user equipment UE with the lowest UE capability may be, for example, the user equipment UE with the smallest usable maximum bandwidth, and the maximum bit rate that can be received is It may be the lowest user apparatus UE.

  When the maximum usable bandwidth of base station 10 is divided into a plurality of subbands, the bandwidth of the PDCCH region may be equal to or less than the bandwidth of one subband. For example, the bandwidth of one subband may be set to a bandwidth that can be regarded as having substantially the same radio characteristics. However, even in this case, it is desirable that the bandwidth of the 1PDCCH region in the setting example (part 1) is at least equal to or smaller than the maximum usable bandwidth of the user apparatus UE having the lowest UE capability.

  Further, the bandwidth of the PDCCH region may be a bandwidth that can be supported by one RF circuit of the base station 10. For example, when the maximum usable bandwidth of the base station 10 is an ultra-wideband, the base station 10 does not realize all the bandwidth with one RF circuit, but performs radio signal processing in parallel with a plurality of RF circuits. It is also assumed that an ultra-wide bandwidth can be realized by doing so. However, even in this case, it is desirable that the bandwidth of the PDCCH region in the setting example (part 1) is at least equal to or less than the maximum usable bandwidth of the user apparatus UE having the lowest UE capability.

  According to the setting example (part 1), since the PDCCH regions having the same bandwidth are set between the user apparatuses UE, the process of the base station 10 transmitting the control signal can be simplified.

[Setting example (2)]
FIG. 7 is a diagram illustrating a setting example (part 2) of the PDCCH region. The base station 10 sets the PDCCH region to a different bandwidth for each user apparatus UE according to the UE capability of the user apparatus UE. The PDCCH region can be set at an arbitrary frequency position as long as it is within the maximum usable bandwidth of the base station 10. For example, as shown in FIG. 7, it is assumed that there is a UE # 1 whose maximum usable bandwidth is A and a UE # 2 whose maximum usable bandwidth is B (where A <B). In this case, for example, the base station 10 sets a PDCCH region having a bandwidth A or less for UE # 1, and sets a PDCCH region having a bandwidth B or less for UE # 2.

  According to the setting example (part 2), since the PDCCH region having a bandwidth corresponding to the UE capability of the user apparatus UE is set, the base station 10 can transmit control information using a wide range of radio resources.

[Setting example (3)]
FIG. 8 is a diagram illustrating a setting example (part 3) of the PDCCH region. The base station 10 sets one or a plurality of PDCCH regions having a predetermined bandwidth according to the UE capability of the user apparatus UE. For example, as shown in FIG. 8, it is assumed that there is UE # 1 whose maximum usable bandwidth is A and UE # 2 whose maximum usable bandwidth is B (where A <B). In this case, for example, the base station 10 sets one PDCCH region that is the bandwidth A (or bandwidth A or less) in the UE # 1, and the bandwidth A (or bandwidth A or less) in the UE # 2. A plurality of PDCCH regions are set. The “predetermined bandwidth” may be the same as the bandwidth described in the setting example (part 1).

  When a plurality of PDCCH regions are set, the RNTI (Radio Network Temporary Identifer) used for the CRC mask in each of the plurality of PDCCH regions may be different. Also, the type (format, etc.) of control information transmitted in each of the plurality of PDCCH regions may be common to all PDCCH regions, or may be different for each PDCCH region. Further, the user apparatus UE may switch the PDCCH areas to be monitored temporally instead of simultaneously monitoring all of the plurality of PDCCH areas. In this case, the user apparatus UE notifies the base station 10 of the number of PDCCH regions that can be monitored simultaneously as UE capability information, and receives notification of the period during which each PDCCH region should be monitored from the base station 10. Good.

  According to the setting example (part 3), since the number of PDCCH regions corresponding to the UE capability of the user apparatus UE is set, the base station 10 can transmit control information using a wide range of radio resources.

(Supplementary items regarding the processing procedure of the first embodiment)
The user apparatus UE may notify the base station 10 of the UE capability information transmitted in step S11 of FIG. 4 including the UE capability specialized for PDCCH. PDCCH-specific UE capabilities include, for example, the maximum bandwidth that can be monitored by PDCCH, the frequency band that can be monitored by PDCCH, the number of control information that can be received simultaneously, the number of PDCCH regions that can be monitored simultaneously, Whether or not it is possible to receive discontinuous RBs (RBs assigned discontinuously). Thereby, the user apparatus UE can notify the base station 10 of various UE capabilities.

  The PDCCH region described above may target only a specific search space. For example, the base station 10 may set the PDCCH region in the user apparatus UE only for the common search space, may set the PDCCH region in the user apparatus UE only for the UE dedicated search space, The PDCCH region may be set for the user apparatus UE only for the group-specific search space. Further, the base station 10 may set the user apparatus UE for PDCCH regions at different positions for each search space. The control information that can be transmitted in the PDCCH region described above may be limited to specific control information (for example, DCI in a specific format).

  The processing procedure of the first embodiment described above has been described on the assumption that it is applied to the downlink. However, by replacing “PDCCH” and “PDCCH region” with “PUCCH” and “PUCCH region”, respectively, One embodiment may be applied to the uplink.

<Functional configuration>
(base station)
FIG. 9 is a diagram illustrating an example of a functional configuration of the base station according to the first embodiment. As illustrated in FIG. 9, the base station 10 includes a signal transmission unit 101, a signal reception unit 102, and a setting unit 103. Note that FIG. 9 shows only functional units that are particularly related to the embodiment of the present invention in the base station 10, and has at least a function (not shown) for performing an operation based on LTE. The functional configuration shown in FIG. 9 is only an example. As long as the operation according to the present embodiment can be executed, the function classification and the name of the function unit may be anything.

  The signal transmission unit 101 includes a function of generating various types of physical layer signals from a higher layer signal to be transmitted from the base station 10 and wirelessly transmitting the signals. The signal reception unit 102 includes a function of wirelessly receiving various signals from the user apparatus UE and acquiring a higher layer signal from the received physical layer signal. The setting unit 103 notifies (sets) information indicating a control channel region set in a part of the maximum usable bandwidth of the base station 10 to the user apparatus UE using broadcast information or RRC signaling. ).

  In addition, when applying 1st Embodiment to an uplink, each function part may operate | move as follows.

  The signal transmission unit 101 includes a function of generating various types of physical layer signals from a higher layer signal to be transmitted from the base station 10 and wirelessly transmitting the signals. The signal reception unit 102 includes a function of wirelessly receiving various signals from the user apparatus UE and acquiring a higher layer signal from the received physical layer signal. Further, the signal receiving unit 102 includes a function of receiving uplink control information by monitoring the uplink control channel region set in the user apparatus UE by the setting unit 103.

  The setting unit 103 notifies the user apparatus UE of information indicating an uplink control channel region set in a part of the maximum usable bandwidth of the base station 10 using broadcast information (SIB) or RRC signaling ( Function to set).

(User device)
FIG. 10 is a diagram illustrating an example of a functional configuration of the user apparatus according to the first embodiment. As illustrated in FIG. 10, the user apparatus UE includes a signal transmission unit 201, a signal reception unit 202, an acquisition unit 203, and a notification unit 204. Note that FIG. 10 shows only functional units that are particularly related to the embodiment of the present invention in the user apparatus UE, and has at least a function (not shown) for performing an operation based on LTE. Further, the functional configuration shown in FIG. 10 is merely an example. As long as the operation according to the present embodiment can be executed, the function classification and the name of the function unit may be anything.

  The signal transmission unit 201 includes a function of generating and wirelessly transmitting various physical layer signals from higher layer signals to be transmitted from the user apparatus UE. The signal reception unit 202 includes a function of wirelessly receiving various signals from the base station 10 and acquiring higher layer signals from the received physical layer signals. The signal receiving unit 202 includes a function of receiving control information by monitoring a control channel region indicated by information indicating the control channel region acquired by the acquiring unit 203.

  The acquisition unit 203 includes a function of acquiring information indicating a control channel region set to a part of the maximum usable bandwidth of the base station 10 from the base station 10. In addition, the acquisition unit 203 sets the control channel region indicated by the information in the signal reception unit 202. The notification unit 204 includes a function of notifying the base station 10 of capability information indicating the maximum usable bandwidth of the user apparatus UE itself.

  The control channel region set in the signal reception unit 202 is a bandwidth equal to or smaller than the narrowest bandwidth among the maximum usable bandwidths of the user apparatuses UE that can communicate with the base station 10 or the maximum usable bandwidth of the base station 10. The bandwidth may be equal to or less than the bandwidth of each of the plurality of subbands included in the bandwidth. Further, the control channel region set in the signal receiving unit 202 may be a bandwidth equal to or less than the maximum usable bandwidth of the user apparatus UE itself. In addition, the control channel region set in the signal receiving unit 202 includes a plurality of control channel regions, and the sum of the bandwidths of the plurality of control channel regions is a bandwidth equal to or less than the maximum usable bandwidth of the user apparatus UE itself. It may be a width.

  In addition, when applying 1st Embodiment to an uplink, each function part may operate | move as follows.

  The signal transmission unit 201 includes a function of generating and wirelessly transmitting various physical layer signals from higher layer signals to be transmitted from the user apparatus UE. In addition, the signal transmission unit 201 includes a function of transmitting control information in the uplink control channel region indicated by the information indicating the uplink control channel region acquired by the acquisition unit 203. The signal reception unit 202 includes a function of wirelessly receiving various signals from the base station 10 and acquiring higher layer signals from the received physical layer signals.

  The acquisition unit 203 includes a function of acquiring, from the base station 10, information indicating an uplink control channel region set to a part of the maximum usable bandwidth of the base station 10. In addition, the acquisition unit 203 sets the uplink control channel region indicated by the information in the signal transmission unit 201. The notification unit 204 includes a function of notifying the base station 10 of capability information indicating the maximum usable bandwidth of the user apparatus UE itself.

  The uplink control channel region set in the signal transmission unit 201 is a bandwidth equal to or smaller than the narrowest bandwidth among the maximum usable bandwidths of each user apparatus UE capable of communicating with the base station 10 or usable by the base station 10 The bandwidth may be equal to or less than the bandwidth of each of the plurality of subbands included in the maximum bandwidth. Further, the uplink control channel region set in the signal transmission unit 201 may have a bandwidth that is equal to or less than the maximum usable bandwidth of the user apparatus UE itself. Further, the uplink control channel region set in the signal transmission unit 201 includes a plurality of uplink control channel regions, and the total bandwidth of each of the plurality of uplink control channel regions is the maximum usable bandwidth of the user apparatus UE itself. The bandwidth may be equal to or less than the width.

<Summary>
As described above, according to the first embodiment, a user apparatus in a wireless communication system having a base station and a user apparatus, which is the maximum bandwidth that can be used for communication by the base station from the base station. The control unit receives the control information by monitoring the control channel region indicated by the acquisition unit that acquires information indicating the control channel region set in a part of the bandwidth and the information indicating the control channel region. And a receiving unit. According to this user apparatus UE, a technology that allows flexible setting of control channel resources is provided in consideration of accommodating user apparatuses having various UE capabilities.

  The control channel region is set to a bandwidth equal to or less than the narrowest bandwidth among the maximum bandwidths, which are the maximum bandwidths that can be used for communication by each user apparatus that can communicate with the base station, or the base station The bandwidth may be set to be equal to or less than the bandwidth of each of the plurality of subbands included in the maximum bandwidth that is the maximum bandwidth that the station can use for communication. Thereby, since the control channel area | region of a common bandwidth is set between the user apparatuses UE, the process of the base station 10 can be simplified.

  A notification unit that notifies the base station of capability information indicating a maximum bandwidth that is the maximum bandwidth that the user apparatus can use for communication, and the control channel region is used by the user apparatus for communication It may be set to a bandwidth equal to or less than the maximum bandwidth that is the maximum possible bandwidth. Thereby, since the control channel area | region of the bandwidth according to UE capability of the user apparatus UE is set, the base station 10 can transmit control information with a radio | wireless resource of a wide range.

  The user apparatus has a notification unit that notifies the base station of capability information indicating a maximum bandwidth that is a maximum bandwidth that can be used for communication, and the control channel region includes a plurality of control channel regions, The total bandwidth of each of the plurality of control channel regions may be a bandwidth equal to or less than the maximum bandwidth that is the maximum bandwidth that the user apparatus can use for communication. Thereby, since the control channel area | region of the number according to UE capability of the user apparatus UE is set, the base station 10 can transmit control information with a radio | wireless resource of a wide range.

  Further, according to the first embodiment, there is provided a signal reception method executed by a user apparatus in a radio communication system having a base station and a user apparatus, and the maximum that the base station can use for communication from the base station. Obtaining information indicating a control channel region set in a part of the maximum bandwidth that is a bandwidth of the control channel, and monitoring the control channel region indicated by the information indicating the control channel region Receiving a control information. A signal receiving method is provided. According to this signal reception method, in consideration of accommodating user apparatuses with various UE capabilities, a technique is provided that enables flexible setting of control channel resources.

<< Second Embodiment >>
Next, a radio communication system according to the second embodiment will be described. “<System configuration>” and “<Bandwidth overview>” described in the first embodiment are also applied to the radio communication system according to the second embodiment.

<Processing procedure>
Subsequently, a processing procedure performed by the wireless communication system according to the second embodiment will be described. In the radio communication system according to the second embodiment, even when the base station 10 and the user apparatus UE communicate with one carrier (single carrier), a plurality of TBs are transmitted with 1 TTI (Transmission Timing Interval). Allows sending and receiving.

  In the following description, “TB” may be replaced with “MAC PDU”. Moreover, 1TTI may be the same time length as one subframe, or may be the same time length as a plurality of (for example, two) subframes. One TTI may have the same time length as one slot, or may have the same time length as a plurality of (for example, two) slots. Further, 1 TTI may be the same time length as a mini-slot. That is, in the following description, “1TTI” may be replaced with “1 subframe”, “1 slot”, “1 minislot”, “multiple subframes”, “multiple slots”, “multiple minislots”, and the like. . Note that a mini-slot is a unit resource for realizing scheduling with the number of symbols smaller than the number of symbols in one slot, and is a time unit that is being studied in 5G.

(Multi-TB transmission / reception method (1))
FIG. 11 is a diagram illustrating a transmission / reception method (part 1) of multiple TBs. In the transmission / reception method (part 1), the base station 10 transmits information on a plurality of TBs to the user apparatus UE with one DCI (Downlink Control Information) (S21). From the information included in the DCI received from the base station 10, the user apparatus UE grasps radio resources, modulation schemes, HARQ process IDs (may be referred to as HARQ process numbers), etc., to which each of the plurality of TBs is transmitted. Then, a process of receiving a plurality of TBs is performed (S22).

  FIG. 12A shows a specific example of information included in DCI used in the multiple TB transmission / reception method (part 1). In the example of FIG. 12A, for each TB, a transmission resource (a radio resource to which the TB is mapped) position, a modulation and coding scheme (MCS) indicating an encoding rate, a HARQ process ID, and an RV (Redundancy Version) ), NDI (New Data Indicator). By using the DCI shown in FIG. 12A, the base station 10 can map a plurality of TBs to different radio resources and apply different MCSs.

  Here, as a method of transmitting a plurality of TBs with 1 TTI, the base station 10 may generate one TB by combining bit strings of the plurality of TBs and transmit the one TB. Further, the user apparatus UE side may extract a plurality of TBs by dividing a bit string obtained by decoding the received radio signal. An example of DCI in this case is shown in FIG. In the example of FIG. 12B, the transmission resource location and the MCS are set in common with the TB, and the HARQ process ID, RV, and NDI are set for each TB. The TB division information is information indicating a range of bit examples corresponding to each TB in the combined bit string.

  According to the multiple TB transmission / reception method (part 1), since the user apparatus UE only needs to receive one DCI even when receiving multiple TBs, the processing load when monitoring the control channel is reduced. Will be.

(Multi-TB transmission / reception method (2))
FIG. 13 is a diagram illustrating a transmission / reception method (part 2) of a plurality of TBs. In the transmission / reception method (part 2), the base station 10 transmits one DCI per user TB to the user apparatus UE. In other words, when transmitting a plurality of TBs, the base station 10 transmits the same number of DCIs as the number of TBs to the user apparatus UE (S31). The user apparatus UE recognizes radio resources, modulation schemes, HARQ process IDs, and the like transmitted from the plurality of TBs from information included in the plurality of DCIs received from the base station 10, and receives the plurality of TBs. Processing is performed (S32).

  FIG. 14 shows a specific example of information included in DCI used in the multiple TB transmission / reception method (part 2). In the example of FIG. 14, the transmission resource (radio resource to which the TB is mapped) position, MCS, HARQ process ID, RV, and NDI related to one TB are included.

  In the multiple TB transmission / reception method (part 2), the base station 10 may transmit a plurality of DCIs by frequency multiplexing within one TTI. For example, the base station 10 may transmit a plurality of DCIs at different frequencies using a control channel within the same TTI. Further, the base station 10 may transmit a plurality of DCIs in a time multiplexed manner within 1 TTI. For example, the base station 10 may transmit the first DCI with a predetermined symbol and transmit the second DCI with a symbol after the predetermined symbol. Each RNTI used when CRC masking a plurality of DCIs may be the same RNTI or different RNTIs. In order to reduce the processing load on the user apparatus UE, a plurality of DCI transmission methods (multiplexing methods) may be set in advance from the base station 10 to the user apparatus UE using broadcast information (SIB) or RRC signaling.

  According to the transmission / reception method (part 2) of multiple TBs, the user apparatus UE can receive TBs corresponding to DCIs that have been successfully received, even if reception of some DCIs has failed. It is possible to reduce the probability of failing to receive the TB.

(Supplementary items regarding the processing procedure of the second embodiment)
As illustrated in FIG. 15, the base station 10 may notify the user apparatus UE in advance of the number of TBs and / or the number of DCIs transmitted in 1 TTI (S41). More specifically, the base station 10 may notify the user apparatus UE of notification of the number of TBs and / or the number of DCIs transmitted in 1 TTI using broadcast information (SIB) or RRC signaling. When the multiple TB transmission / reception method (part 2) is used, the base station 10 may notify the user apparatus UE of the number of TBs transmitted in 1 TTI in each DCI. Thereby, it becomes possible to make the recognition of the number of TBs and / or the number of DCIs transmitted and received in 1 TTI coincide between the base station 10 and the user apparatus UE. In addition, in the case where a plurality of TB transmission / reception methods (part 2) are used, the user apparatus UE can transmit NACK to the base station 10 when DCI for the number of TBs notified in advance cannot be received. become.

  The user apparatus UE may notify the base station 10 of the number of TBs and / or the number of DCIs that can be received in 1 TTI in the UE capability information. Thereby, the base station 10 can determine the number of TBs to be transmitted in 1 TTI within the range of the capability of the user apparatus UE.

  Also, in the 3GPP specification, the base station 10 and the user equipment UE specify the size of the soft buffer that is a memory used for HARQ processing, the UE category, the number of MIMO layers set for each cell, and the modulation set for each cell. It is prescribed to calculate based on the method and the number of CCs to be aggregated. In the second embodiment, the base station 10 and the user apparatus UE further divide the soft buffer size calculated by the calculation method stipulated in the conventional LTE by the number of TBs that are simultaneously transmitted and received, The buffer size may be calculated. Thereby, the base station 10 and the user apparatus UE can appropriately perform rate matching processing based on the calculated soft buffer size when transmitting and receiving a plurality of TBs with 1 TTI.

  Also, when a plurality of TB transmission / reception methods (part 2) are used and the base station 10 transmits a plurality of DCIs in 1 TTI, the base station 10 transmits information indicating the number of DCIs transmitted in 1 TTI to the user apparatus UE. You may make it transmit. The user apparatus UE can operate to receive the notified number of DCIs, and can recognize that DCI reception has failed when the grasped number of DCIs cannot be received. it can. The user apparatus UE may notify the base station 10 that reception of DCI has failed at a timing before the timing at which the TB is transmitted. The base station 10 can quickly retransmit the TB.

  Further, the base station 10 transmits information indicating that transmission of a plurality of DCIs is started in 1 TTI and information indicating that transmission of a plurality of DCIs is stopped in 1 TTI, in the RRC signaling, MAC layer, or physical layer. You may make it transmit to the user apparatus UE using a signal. Further, the base station 10 transmits information indicating that transmission of a plurality of DCIs is started in 1 TTI to the user apparatus UE, and the user apparatus UE receives information indicating that transmission of a plurality of DCIs is started in 1 TTI. Then, when a predetermined timer expires, it may be considered (recognized) that transmission of a plurality of DCIs is stopped in 1 TTI. The predetermined timer value may be individually set for each user apparatus UE from the base station 10 by RRC signaling, a MAC layer signal, or the like, or may be set for each user apparatus UE and each MAC entity. The predetermined timer value may be set for each subband described in the first embodiment, or may be set in association with the PDCCH region described in the first embodiment. The user apparatus UE can perform reception processing by assuming that only one DCI is transmitted while a plurality of DCIs are not transmitted in 1 TTI.

  When receiving a plurality of TBs in 1 TTI, the user apparatus UE may feed back ACK / NACK to the base station 10 for each TB, or feed back ACK / NACK for a plurality of TBs collectively. May be. In the latter case, ACK may be fed back only when reception of all TBs is successful (that is, NACK is fed back when there is at least one TB that has failed to be received).

  Since the number of HARQ processes defined in the conventional LTE is 8 at the maximum, the HARQ process IDs are defined from 0 to 7. However, in the second embodiment, since a plurality of TBs can be transmitted in 1 TTI, the maximum number of HARQ processes may be extended. In this case, the HARQ process ID may be expanded accordingly. For example, when the number of TBs that can be transmitted simultaneously within 1 TTI = 4, the maximum number of HARQ processes may be 32, and the HARQ process ID may be expanded to 0 to 31. Note that the method of assigning the HARQ process ID is not limited to this. For example, the HARQ process may be defined by a combination of two IDs (for example, an nm format such as 1-1, 1-2). When the number of TBs that can be transmitted simultaneously within 1 TTI is X and the maximum number of HARQ processes is Y, “n” and “m” are, for example, “n = 0 to Y / X−1”, “ m = 0 to X-1 ”may be defined. “N” may be referred to as a HARQ process ID, and “m” may be referred to as a sub-HARQ process ID.

  The base station 10 may transmit the content (data) of the TB transmitted in 1 TTI to be the same. Diversity reception can be realized by the user apparatus UE. In this case, the same HARQ process ID may be specified as the HARQ process ID of each TB notified by DCI.

  A different HARQ RTT (Round Trip Timer) may be applied to each TB transmitted and received in 1 TTI. Also, different control may be applied to each TB transmitted / received in 1 TTI for control (for example, drx-RetransmissionTimer) performed in units of HARQ among DRX control.

  In conventional LTE, the base station 10 and the user apparatus UE can transmit and receive by spatially multiplexing up to two TBs to the same radio resource by applying MIMO by applying MIMO. Also in the second embodiment, the base station 10 and the user apparatus UE may transmit and receive by spatially multiplexing up to two TBs to the same radio resource in 1 TTI by applying MIMO. Also in this case, like conventional LTE, MCS, RV, and NDI are designated for DCI in the DCI, and a codeword swap flag is set as necessary.

  The processing procedure of the second embodiment described above has been described on the assumption that it is applied to the downlink, but the second embodiment may be applied to the uplink. That is, the user apparatus UE may transmit a plurality of TBs with 1 TTI for the uplink. In addition, the number of TBs that can be transmitted and received in 1 TTI may be the same or different in the downlink and uplink.

<Functional configuration>
(base station)
FIG. 16 is a diagram illustrating an example of a functional configuration of the base station according to the second embodiment. As illustrated in FIG. 16, the base station 10 includes a signal transmission unit 301, a signal reception unit 302, and a setting unit 303. FIG. 16 shows only functional units that are particularly related to the embodiment of the present invention in the base station 10, and has at least a function (not shown) for performing an operation based on LTE. Further, the functional configuration shown in FIG. 16 is merely an example. As long as the operation according to the present embodiment can be executed, the function classification and the name of the function unit may be anything.

  The signal transmission unit 301 includes a function of generating various types of physical layer signals from a higher layer signal to be transmitted from the base station 10 and wirelessly transmitting the signals. The signal reception unit 302 includes a function of wirelessly receiving various signals from the user apparatus UE and acquiring a higher layer signal from the received physical layer signal. The setting unit 303 includes a function of setting a plurality of DCI transmission methods, the number of TBs transmitted in 1 TTI, or a predetermined timer value in the user apparatus UE using broadcast (broadcast) information or RRC signaling.

  In addition, when applying 2nd Embodiment to an uplink, the signal receiving part 302 includes the function to receive the signal of several TB with the uplink radio resource allocated to the user apparatus UE.

(User device)
FIG. 17 is a diagram illustrating an example of a functional configuration of the user apparatus according to the second embodiment. As illustrated in FIG. 17, the user apparatus UE includes a signal transmission unit 401, a signal reception unit 402, an acquisition unit 403, and a notification unit 404. Note that FIG. 17 shows only functional units that are particularly related to the embodiment of the present invention in the user apparatus UE, and has at least a function (not shown) for performing an operation based on LTE. In addition, the functional configuration illustrated in FIG. 17 is merely an example. As long as the operation according to the present embodiment can be executed, the function classification and the name of the function unit may be anything.

  The signal transmission unit 401 includes a function of generating various physical layer signals from a higher layer signal to be transmitted from the user apparatus UE and wirelessly transmitting the signals. The signal receiving unit 402 includes a function of wirelessly receiving various signals from the base station 10 and acquiring higher layer signals from the received physical layer signals. The signal reception unit 402 includes a function of receiving a plurality of TB signals using radio resources indicated by the control information.

  Acquisition unit 403 includes a function of acquiring control information indicating radio resources to which each of a plurality of TB signals transmitted in 1 TTI is mapped from base station 10. The information indicating the radio resource indicates the entire radio resource to which each of the plurality of TB signals is mapped, and the control information includes a plurality of bit sequences obtained by decoding the plurality of TB signals. Information indicating the range of the bit string corresponding to each TB may be included. The control information is transmitted from the base station 10 by being divided into a plurality of control information in 1 TTI, and each of the transmitted plurality of control information is information indicating a radio resource to which a signal of one transport block is mapped. May be included.

  In addition, the acquisition unit 403 may acquire information indicating the number of pieces of control information transmitted in 1 TTI from the base station 10. Also, the acquisition unit 403 acquires information indicating that transmission of a plurality of control information is started in 1 TTI and information indicating that transmission of a plurality of control information is stopped in 1 TTI from the base station 10. It may be.

  The notification unit 404 includes a function of notifying the base station 10 of capability information indicating the number of control information that can be received by the user apparatus UE itself in 1 TTI.

  In addition, when applying 2nd Embodiment to an uplink, the signal transmission part 401 includes the function to transmit the signal of several TB with the radio | wireless resource shown by control information.

<Summary>
As described above, according to the second embodiment, there is provided a user apparatus in a wireless communication system having a base station and a user apparatus that perform communication using one carrier, and a plurality of transformers transmitted from the base station in 1 TTI. An acquisition unit configured to acquire control information indicating a radio resource to which each of the signals of the port block is mapped; and a reception unit configured to receive signals of the plurality of transport blocks using the radio resource indicated by the control information. A user equipment is provided. According to this user apparatus UE, there is provided a technology capable of performing TB transmission / reception processing in parallel even when operated by a single carrier.

  The information indicating the radio resource indicates the entire radio resource to which each of the signals of the plurality of transport blocks is mapped, and the control information is obtained by decoding the signals of the plurality of transport blocks. Of the bit string, information indicating a range of bit strings corresponding to each of the plurality of transport blocks may be included. Thereby, when decoding the received radio signal, the user apparatus UE can perform the decoding process without considering the number of TBs, and can simplify the process of the physical layer.

  In addition, the control information is divided into a plurality of control information by 1 TTI and transmitted from the base station, and each of the plurality of control information includes information indicating a radio resource to which a signal of one transport block is mapped. It may be included. Thereby, even if the decoding of some DCIs fails, the user apparatus UE can receive the TBs that have successfully decoded the DCIs, thereby reducing the probability of failure to receive all the TBs. It becomes possible.

  And a notification unit that notifies the base station of capability information indicating the number of control information that can be received by the user apparatus in 1 TTI, and the acquisition unit includes a plurality of pieces of information transmitted from the base station in 1 TTI. Information indicating the number of control information may be acquired. Thereby, the base station 10 can determine the number of TBs to be transmitted in 1 TTI within the range of the capability of the user apparatus UE, and the user apparatus UE grasps in advance the number of control information scheduled to be received. It becomes possible.

  Further, the acquisition unit acquires information indicating that transmission of a plurality of control information is started in 1 TTI and information indicating that transmission of a plurality of control information is stopped in 1 TTI from the base station. It may be. As a result, the user apparatus UE can perform reception processing by assuming that only one DCI is transmitted while a plurality of DCIs are not transmitted in 1 TTI.

  In addition, according to the second embodiment, there is provided a signal reception method executed by a user apparatus in a wireless communication system having a base station and a user apparatus that perform communication using one carrier, from the base station at 1 TTI. Obtaining control information indicating radio resources to which each of the signals of the plurality of transport blocks to be transmitted is mapped, and receiving the signals of the plurality of transport blocks using the radio resources indicated by the control information A signal receiving method is provided. According to this signal receiving method, a technique capable of performing TB transmission / reception processing in parallel even when operated by a single carrier is provided.

<< Hardware configuration >>
The block diagrams (FIGS. 9, 10, 16, and 17) used for the description of the above embodiments show functional unit blocks. 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, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.

  For example, the base station 10 and the user apparatus UE in an embodiment of the present invention may function as a computer that performs processing of the signal reception method of the present invention. FIG. 18 is a diagram illustrating an example of the hardware configuration of the base station and the user apparatus according to each embodiment. The base station 10 and the user apparatus UE described above may be physically configured as a computer apparatus including a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 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 configurations of the base station 10 and the user apparatus UE may be configured to include one or a plurality of the apparatuses illustrated in the figure, or may be configured not to include some apparatuses.

  Each function in the base station 10 and the user apparatus UE is obtained by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculation, communication by the communication apparatus 1004, and memory 1002. This is realized by controlling reading and / or writing of data in the storage 1003.

  For example, the processor 1001 controls the entire computer by operating an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the signal transmission unit 101 of the base station 10, the signal reception unit 102, the setting unit 103, the signal transmission unit 301, the signal reception unit 302, the setting unit 303, and the signal transmission unit 201 of the user apparatus UE, The signal reception unit 202, the acquisition unit 203, the notification unit 204, the signal transmission unit 401, the signal reception unit 402, the acquisition unit 403, and the notification unit 404 may be realized by the processor 1001.

  In addition, the processor 1001 reads a program (program code), 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 operations described in the above embodiments is used. For example, the signal transmission unit 101 of the base station 10, the signal reception unit 102, the setting unit 103, the signal transmission unit 301, the signal reception unit 302, the setting unit 303, and the signal transmission unit 201 of the user apparatus UE, The signal reception unit 202, the acquisition unit 203, the notification unit 204, the signal transmission unit 401, the signal reception unit 402, the acquisition unit 403, and the notification unit 404 are stored in the memory 1002 and operate on the processor 1001. It may be realized by a control program, and may be realized similarly for other functional blocks. Although the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by 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 includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. 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 implement the signal receiving method according to the embodiment of the present invention.

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

  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 a network device, a network controller, a network card, a communication module, or the like. For example, the signal transmission unit 101, the signal reception unit 102, the signal transmission unit 301, the signal reception unit 302, the signal transmission unit 201 of the user apparatus UE, the signal reception unit 202, and the signal transmission unit 401 of the base station 10 And the signal receiving part 402 may be implement | achieved by the communication apparatus 1004. FIG.

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

  Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.

  In addition, the base station 10 and the user apparatus UE include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). Hardware may be configured, and a part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.

<< Supplement of each embodiment >>
The notification of information is not limited to the aspect / embodiment described in the present specification, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

  Each aspect / embodiment described herein 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, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), The present invention may be applied to a Bluetooth (registered trademark), a system using another appropriate system, and / or a next generation system extended based on the system.

  As long as there is no contradiction, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.

  The specific operation assumed to be performed by the base station in this specification may be performed by its upper node in some cases. In a network composed of one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (e.g., Obviously, this can be done by MME or S-GW, but not limited to these. Although the case where there is one network node other than the base station in the above is illustrated, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

  Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

  Each aspect / embodiment described in this specification may be used independently, may be used in combination, or may be switched according to execution. In addition, notification of predetermined information (for example, notification of being “X”) is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.

  Information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of

  As used herein, the terms “system” and “network” are used interchangeably.

  In addition, information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information. . For example, the radio resource may be indicated by an index.

  The names used for the parameters described above are not limiting in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are limited in any respect. is not.

  Base station 10 may accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can be divided into a base station subsystem (for example, an indoor small base station RRH: Remote). Communication service can also be provided by Radio Head). The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.

  The user equipment UE is a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, by a person skilled in the art It may also be called mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

  As used herein, the terms “determining” and “determining” may encompass a wide variety of actions. “Judgment” and “determination” are, for example, judgment, calculation, calculation, processing, derivation, investigating, looking up (eg, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like. In addition, “determination” and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as "determined" or "determined". In addition, “determination” and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.

  As used herein, the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

  As long as the terms “including”, “including”, and variations thereof are used herein or in the claims, these terms are similar to the term “comprising”. It is intended to be comprehensive. Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR.

  A radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. 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 symbols, SC-FDMA symbols, etc.) in the time domain. Each of the radio frame, subframe, slot, and symbol represents a time unit for transmitting a signal. Radio frames, subframes, slots, and symbols may be called differently corresponding to each. For example, in the LTE system, the base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each mobile station) to each mobile station. The minimum scheduling time unit may be referred to as TTI. For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot may be called a TTI. A resource block (RB) 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. In the time domain of the resource block, one or a plurality of symbols may be included, and one slot, one subframe, or a length of 1 TTI may be included. One TTI and one subframe may each be composed of one or a plurality of resource blocks.

  Throughout this disclosure, if articles are added by translation, for example, a, an, and the in English, these articles must be clearly indicated otherwise in context, Including multiple things.

  Although the present invention has been described in detail above, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

UE user apparatus 10 base station 101 signal transmission unit 102 signal reception unit 103 setting unit 201 signal transmission unit 202 signal reception unit 203 acquisition unit 204 notification unit 301 signal transmission unit 302 signal reception unit 303 setting unit 401 signal transmission unit 402 signal reception unit 403 Acquisition unit 404 Notification unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device

Claims (5)

A user apparatus in a wireless communication system having a base station and a user apparatus,
An acquisition unit that acquires information indicating a control channel region set in a part of the maximum bandwidth that is the maximum bandwidth that the base station can use for communication from the base station;
A receiving unit for receiving control information by monitoring the control channel region indicated by information indicating the control channel region;
A user device. The control channel region is set to a bandwidth equal to or less than the narrowest bandwidth among the maximum bandwidths, which are the maximum bandwidths that can be used for communication by each user apparatus that can communicate with the base station, or the base station Set to a bandwidth equal to or less than the bandwidth of each of the plurality of subbands included in the maximum bandwidth, which is the maximum bandwidth that the station can use for communication
The user device according to claim 1. A notification unit that notifies the base station of capability information indicating a maximum bandwidth that is the maximum bandwidth that the user apparatus can use for communication;
The control channel region is set to a bandwidth equal to or less than the maximum bandwidth that is the maximum bandwidth that the user apparatus can use for communication.
The user device according to claim 1. A notification unit that notifies the base station of capability information indicating a maximum bandwidth that is the maximum bandwidth that the user apparatus can use for communication;
The control channel region includes a plurality of control channel regions, and the sum of the bandwidths of the plurality of control channel regions is a bandwidth equal to or less than the maximum bandwidth that is the maximum bandwidth that the user apparatus can use for communication. is there,
The user device according to claim 1. A signal reception method executed by a user apparatus in a wireless communication system having a base station and a user apparatus,
Obtaining from the base station information indicating a control channel region set in a part of the maximum bandwidth that is the maximum bandwidth that the base station can use for communication;
Receiving the control information by monitoring the control channel region indicated by the information indicating the control channel region; and
A signal receiving method comprising:

Images