DESCRIPTION TITLE OF THE INVENTION: MOBILE COMMUNICATION METHOD, MOBILE STATION, AND RADIO BASE STATION 5 TECHNICAL FIELD [0001] The present invention relates to a mobile communication method in which a mobile station transmits uplink data to a radio base station in a predetermined cycle by using an uplink radio 10 resource persistently assigned to the mobile station, the transmission starting at an assignment starting time. The present invention also relates to a mobile station and a radio base station. 15 BACKGROUND ART [0002) A communication method as a successor of the W-CDMA (Wideband-Code Division Multiple Access) scheme or the HSDPA (High Speed Downlink Packet Access) scheme, namely, the LTE 20 (Long Term Evolution) scheme has been considered by the W-CDMA standardization organization 3GPP, and the specification setting work is underway. [0003] As a radio access method of the LTE scheme, use of the 25 OFDMA in the downlink and the SC-FDMA (Single-Carrier Frequency Division Multiple Access) in the uplink is under consideration. [0004] The OFDMA is a method for dividing a frequency band into plural narrow frequency bands (sub-carriers) and transmitting 1 data loaded on the respective divided frequency bands. In this method, high-speed transmission is achieved and frequency utilization efficiency is improved by arranging sub-carriers densely on the frequency bands in such a manner that the 5 sub-carriers partially overlap but do not interfere with each other. [0005) The SC-FDMA is a transmission method which reduces interference between terminals by dividing a frequency band and 10 transmitting data by using frequency bands different among plural terminals. The SC-FDMA has a feature of less fluctuation in the transmission power, which achieves low power consumption and wide coverage of terminals. [0006] 15 The LTE scheme is a system in which plural mobile stations communicate with each other by sharing one or more physical channels in both uplink and downlink. [0007] A channel shared by plural mobile stations is generally 20 called a shared channel, which is, in the LTE system, a "Physical Uplink Shared Channel (PUSCH)" in the uplink and a "Physical Downlink Shared Channel (PDSCH)" in the downlink. [0008]~ Also, such a shared channel is, as a transport channel, 25 an "Uplink Shared Channel (UL-SCH) " in the uplink and a "Downlink Shared Channel (DL-SCH)" in the downlink. [0009] In such a communication system using shared channels described above, it is necessary to select which mobile station 2 UE the shared channel is to be assigned to, and to signal to the selected mobile station UE that the shared channel is assigned thereto, for each sub-frame (1 ms, in the LTE scheme) [0010] 5 In the LTE scheme, a control channel used for the signaling is called the "Physical Downlink Control Channel (PDCCH)" or "Downlink Ll/L2 Control Channel (DL Ll/L2 Control Channel)". [0011] Meanwhile, the processing for each sub-frame of selecting 10 which mobile station UE the shared channel is to be assigned to is generally called the "scheduling". [00121 In this case, the processing may also be called the "dynamic scheduling", because the mobile station UE to which 15 the shared channel is assigned is dynamically selected for each sub-frame. [0013] Furthermore, the expression "assigning the shared channel" described above may be alternatively expressed as 20 "assigning a radio resource for the shared channel". [0014] Information of the physical downlink control channel includes, for example, the "downlink scheduling information", the "uplink scheduling grant", and the like. 25 [0015] The "downlink scheduling information" includes, for example, regarding the downlink shared channel, downlink resource block assignment information, UE-IDs, the number of streams, information on the precoding vector, data size, 3 modulation method, information on the HARQ (hybrid automatic repeat request), and the like. [0016] Meanwhile, the "uplink scheduling grant" includes, for 5 example, regarding the uplink shared channel, uplink resource block assignment information, UE-IDs, data size, demodulation method, uplink transmission power information, information on demodulation reference signal in the uplink MIMO, and the like. [0017] 10 Note that, the "downlink scheduling information" and the "uplink scheduling grant" described above may be collectively referred to as "downlink control information (DCI)". [0018] Note that, a mobile station uses a "UE-ID (RNTI) " in the 15 uplink scheduling grant or the downlink scheduling to identify whether or not the uplink scheduling grant or the downlink scheduling is transmitted to the mobile station itself. [0019] More specifically, CRC bits included in the uplink 20 scheduling grant or the downlink scheduling are masked by the RNTI of the mobile station of the transmission destination. [0020] The mobile station performs a CRC check by use of the CRC bits. Then, when the result of the CRC check is OK, the mobile 25 station determines that the uplink scheduling grant or the downlink scheduling is transmitted to the mobile station itself. When the result of the CRC check is not OK, the mobile station determines that the uplink scheduling grant or the downlink scheduling is not transmitted to the mobile station itself. 4 [00211 Note that, the CRC bits are bits used for determining whether a transmitted signal is wrongly decoded or correctly decoded. 5 [0022] Accordingly, when a certain mobile station receives a signal in which the CRC bits are masked by the RNTI of another mobile station, the result of the CRC check becomes not OK even if the signal is actually received without an error. 10 [0023] In addition, the number of bits for the CRC bits and the RNTI is 16 bits, for example. [0024] Note that, a mobile station generally attempts to decode 15 40 uplink scheduling grants or 40 pieces of downlink scheduling information, for example, in a single sub-frame. [0025] In this case, the approximately 40 uplink scheduling grants or the 40 pieces of downlink scheduling information 20 include a signal actually transmitted to the mobile station itself, a signal transmitted to another mobile station, a signal including only noise without any transmission signal, and the like, for example. [0026] 25 On one hand, in "Persistent scheduling", which has been studied for the purpose of implementing VoIP and the like, a radio base station eNB is configured to persistently assign an uplink or downlink radio resource (PUSCH or PDSCH) to the mobile station, in a predetermined cycle, starting at a sub-frame 5 (assignment starting time) specified by a PDCCH (uplink scheduling grant or downlink scheduling information piece). Note that, the "Persistent scheduling" may be called "Semi-Persistent scheduling". 5 [0027] Here, the assignment starting time is a sub-frame in which the downlink scheduling information is transmitted in the case of downlink, and is an uplink transmission sub-frame specified by the uplink scheduling grant in the case of uplink. In 10 addition, the predetermined cycle is 20 ms, for example. [0028] In the "Persistent scheduling", the uplink scheduling grant or the downlink scheduling information is transmitted via a PDCCH only for the initial transmission, and no uplink 15 scheduling grant or no downlink scheduling information is transmitted via the PDCCH for the transmissions after the initial transmission. Thus, the radio resources (overhead) required for transmitting the uplink scheduling grants or the downlink scheduling information can be reduced. As a result, 20 efficient communications can be performed. [0029] Note that, as described above, there are two types of the uplink scheduling grant or the downlink scheduling grant information. One of the types is for notifying, to the mobile 25 station, a resource assignment by the Dynamic scheduling. The other one of the types is for notifying, to the mobile station, a resource assignment by the Persistent scheduling. [0030] In this case, whether the assignment is by the Dynamic 6 scheduling or by the Persistent scheduling described above is identified on the basis of an RNTI and the like, for example, the RNTI set in the uplink scheduling grant or the downlink scheduling information. 5 [0031] More specifically, an RNTI for the Dynamic scheduling and an RNTI for the Persistent Scheduling are defined, and whether the assignment is by the Dynamic scheduling or by the Persistent Scheduling is identified on the basis of the result of the CRC 10 check of the corresponding RNTI. SUMMARY OF INVENTION Problem to be Solved by the Invention [0032] 15 As described above, whether the uplink scheduling grant or the downlink scheduling information notifies, to the mobile station, the assignment by the Dynamic scheduling or by the Persistent scheduling is identified on the basis of the RNTI and the like, the RNTI set in the uplink scheduling grant or 20 the downlink scheduling information. [0033] In addition, the mobile station attempts to decode approximately 40 uplink scheduling grants or 40 pieces of downlink scheduling information in a single sub-frame (within 25 1 ms). [0034] Here, since each of the number of bits for the CRC bits and the number of the RNTI bits is 16 bits, the False Alarm occurs with a probability of 1/2'. 7 [0035] Accordingly, when 40 uplink scheduling grants or 40 pieces of downlink scheduling information are to be decoded, the probability of the occurrence of the False Alarm is 1/216 5 x 40. [0036] Here, the False Alarm is a phenomenon where, even when a radio base station transmits no uplink scheduling grant and no downlink scheduling information to a mobile station, the 10 mobile station determines that an uplink scheduling grant or a downlink scheduling information is transmitted to the mobile station itself. [00371 In the case of a resource assignment by the Dynamic 15 scheduling, for example, the influence of the False Alarm is small because the resource assignment by the uplink scheduling grant or the downlink scheduling information is basically limited in the applicable sub-frame. [0038] 20 In the case of a resource assignment by the Persistent scheduling, however, the influence of the False Alarm is considerable. This is because the assignment starting time is specified by the uplink scheduling grant or the downlink scheduling information, and also a radio resource is assigned 25 periodically and persistently, starting at the assignment starting time by use of the uplink scheduling grant or the downlink scheduling information. [0039] In particular, in the case of uplink, the mobile station 8 performs uplink transmission even though a radio base station assigns no radio resource thereto. Thus, the uplink transmission signal becomes an interference signal which interferes with another mobile station in this case, and the 5 characteristic features of the system degrade considerably. [0040] Note that, the problem associated with the False Alarm described above may occur likewise also in a case of a configuration in which it is determined on the basis of a 10 specific one bit in the PDCCH, instead of an RNTI, whether the one bit is the PDCCH giving an instruction to persistently assign a PDSCH (downlink radio resource) for the "Persistent scheduling" or the PDCCH dynamically assigning a PDSCH (downlink radio resource) for normal downlink scheduling. 15 [00411 In this respect, the present invention has been made in view of the aforementioned problem, and an objective of the present invention is to provide a stable and efficient mobile communication method, a mobile station, anda radio base station 20 by reducing the probability of the occurrence of the False Alarm of uplink scheduling grants in the "Persistent scheduling". Solution to Problem [0042] 25 A first aspect of the present invention is summarized as a mobile communication method in which a mobile station transmits uplink data to a radio base station in a predetermined cycle by using an uplink radio resource persistently assigned to the mobile station, the transmission starting at an 9 assignment starting time, the method including the steps: (Al) notifying, from the radio base station to the mobile station, the predetermined cycle and information on the uplink radio resource; (Bl) determining, at the mobile station, the 5 assignment starting time, and starting the transmission of the uplink data via the uplink radio resource at the assignment starting time, when receiving a persistent assignment signal from the radio base station, wherein, in the step (B) , the mobile station discards the persistent assignment signal, when the 10 information on the uplink radio resource and information notified by the persistent assignment signal are inconsistent with each other. [0043] In the other words, the first aspect of the present 15 invention is summarized as a mobile communication method in which a mobile station transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle, the method including the steps: (A2) 20 notifying, to the mobile station, the predetermined cycle and information on the uplink radio resource; (B2) notifying, to the mobile station, the predetermined scheduling information; and (C2) transmitting uplink data in the predetermined cycle by using the uplink radio resource assigned by the predetermined 25 scheduling information, the transmission starting at a certain point determined on the basis of the received predetermined scheduling information, wherein, in the step (C2) , the predetermined scheduling information is discarded, when the information on the uplink radio resource and information 10 notified by the predetermined scheduling information are inconsistent with each other. [0044] In the first aspect, the predetermined cycle and the 5 information on the uplink radio resource can be notified by an RRC message; and the persistent assignment signal can be notified by a downlink control channel. [0045) In the other words, in the first aspect, in the step (A2), 10 the predetermined cycle and the information on the uplink radio resource can be notif ied by an RRC message; and in the step (B2), the predetermined scheduling information can be transmitted to the mobile station via a downlink control channel. [0046] 15 In the f irst aspect, a range of information to be specified by the persistent assignment signal can be limited by the information on the uplink radio resource; and in the step (B1) , when information notified by the persistent assignment signal is not within the limited range of information to be specifiable 20 by the persistent assignment signal, the mobile station can determine that the information on the uplink radio resource and the information notified by the persistent assignment signal are inconsistent with each other. [0047] 25 In the other words, in the first aspect, in the step (A2), a range of information specifiable by the predetermined scheduling information can be limited by the information on the uplink radio resource; and in the step (C2), when information included in the predetermined scheduling information is not 11 within the range limited by the information on the uplink radio resource, the information on the uplink radio resource and the information notified by the predetermined scheduling information can be determined to be inconsistent with each 5 other. [0048] In the first aspect, the persistent assignment signal, in the other words, the predetermined scheduling information can include at least one of resource block assignment 10 information, amodulation scheme, a data size, MCS information, transmission format information, transmission power control information, information on Cyclic Shift of Demodulation RS, and a CQI request. [0049] 15 A second aspect of the present invention is summarized as a mobile communication method in which a mobile station transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle, the method 20 including the steps of: (A) notifying, to the mobile station, the predetermined cycle and information on the uplink radio resource; (B) notifying, to the mobile station, the predetermined scheduling information; and (C) transmitting uplink data in the predetermined cycle by using the uplink radio 25 resource assigned by the predetermined scheduling information, the transmission starting at a certain point determined on the basis of the received predetermined scheduling information, wherein the step (C) is performed when information included in the predetermined scheduling information coincides with a 12 previously specified content. [0050] In the second aspect, the predetermined scheduling information can include at least one of resource block 5 assignment information, a modulation scheme, a data size, MCS information, transmission format information, transmission power control information, information on Cyclic Shift of Demodulation RS, and a CQI request. [0051] 10 A third aspect of the present invention is summarized as a mobile station configured to transmit uplink data to a radio base station in a predetermined cycle by using an uplink radio resource persistently assigned to the mobile station, the transmission starting at an assignment starting time, the 15 mobile station including: a persistent communication information receiver unit configured to receive the predetermined cycle and information on the uplink radio resource from the radio base station; and a communication unit configured to determine the assignment starting time, and to 20 start the transmission of the uplink data via the uplink radio resource at the assignment starting time, when receiving a persistent assignment signal from the radio base station, wherein the communication unit is configured to discard the persistent assignment signal, when the information on the 25 uplink radio resource and information notified by the persistent assignment signal are inconsistent with each other. [00521 In the other words, the third aspect of the present invention is summarized as a mobile station configured to 13 transmit uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle, the mobile station including: a receiver unit configured to receive the 5 predetermined cycle and information on the uplink radio resource from the radio base station; and a communication unit configured to transmit uplink data in the predetermined cycle by using the uplink radio resource assigned by the predetermined scheduling information, the transmission starting at a certain 10 point determined on the basis of the predetermined scheduling information received from the radio base station, wherein the communication unit is configured to discard the predetermined scheduling information, when the information on the uplink radio resource and information notified by the predetermined 15 scheduling information are inconsistent with each other. [0053] In the third aspect, the predetermined cycle and the information on the uplink radio resource can be notified by an RRC message; and the persistent assignment signal can be 20 notified by a downlink control channel. [0054] In the other words, in the third aspect, the receiver unit can be configured to receive the predetermined cycle and the information on the uplink radio resource via an RRC message; 25 and the communication unit can be configured to receive the predetermined scheduling information via a downlink control channel. [0055] In the third aspect, the communication unit can be 14 conf igured to determine that the information on the uplink radio resource and the information notified by the predetermined scheduling information are inconsistent with each other, when information included in the predetermined scheduling 5 information is not within a range of information specifiable by the predetermined scheduling information, the range limited by the information on the uplink radio resource. [0056] In the third aspect, the persistent assignment signal, 10 in the other words, the predetermined scheduling information can include at least one of resource block assignment information, a modulation scheme, a data size, MCS information, transmission format information, transmission power control information, information on Cyclic Shift of Demodulation RS, 15 and a CQI request. [0057] A fourth aspect of the present invention is summarized as a mobile station configured to transmit uplink data to a radio base station by using an uplink radio resource assigned to the 20 mobile station by predetermined scheduling information, in a predetermined cycle, the mobile station including: a receiver unit configured to receive the predetermined cycle and information on the uplink radio resource from the radio base station; and a communication unit configured to transmit uplink 25 data in the predetermined cycle by using the uplink radio resource assigned by the predetermined scheduling information, the transmission starting at a certain point determined on the basis of the predetermined scheduling information received from the radio base station, wherein the communication unit is 15 configured to transmit the uplink data, when information notif ied by the predetermined scheduling information coincides with a previously specified content. [0058] 5 In the forth aspect, the persistent assignment signal, in the other words, the predetermined scheduling information can include at least one of resource block assignment information, a modulation scheme, a data size, MCS information, transmission format information, transmission power control 10 information, information on Cyclic Shift of Demodulation RS, and a CQI request. [0059] A fifth aspect of the present invention is summarized as a radio base station to be used in a mobile communication method 15 in which a mobile station transmits uplink data to the radio base station in a predetermined cycle by using an uplink radio resource persistently assigned to the mobile station, the transmission starting at an assignment starting time, the radio base station includes: a persistent communication information 20 transmitter unit configured to notify, to the mobile station, the predetermined cycle and information on the uplink radio resource; a persistent assignment signal transmitter unit configured to transmit the persistent assignment signal to the mobile station; and communication unit configured to start 25 reception of the uplink data via the uplink radio resource at the assignment starting time determined by the persistent assignment signal, wherein the persistent assignment transmitter unit configured to notify information limiting a range of information to be specifiable by the persistent 16 assignment signal, as the information on the uplink radio resource. [0060] In the other words, the fifth aspect of the present 5 invention is summarized as a radio base station used in a mobile communication system in which a mobile station transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle, the radio base station 10 including: a first transmitter unit configured to notify, to the mobile station, the predetermined cycle and information on the uplink radio resource; a second transmitter unit configured to transmit the predetermined scheduling information to the mobile station; and a communication unit configured to receive 15 uplink data transmitted in the predetermined cycle by using the uplink radio resource assigned by the predetermined scheduling information, wherein the second transmitter unit is configured to notify, to the mobile station, information limiting a range of information specifiable by the predetermined scheduling 20 information, as the information on the uplink radio resource. [0061] In the fifth aspect, the predetermined cycle and the information on the uplink radio resource can be notified by an RRC message; and the persistent assignment signal can be 25 notified by a downlink control channel. [0062] In the other words, in the fifth aspect, the first transmitter unit can be configured to notify, to the mobile station, the predetermined cycle and the information on the 17 uplink radio resource via an RRC message; and the first transmitter unit can be configured to notify, to the mobile station, the predetermined scheduling information via a downlink control channel. 5 [0063] In the fifth aspect, the persistent assignment signal, in the other words, the predetermined scheduling information can include at least one of resource block assignment information, amodulation scheme, adatasize, MCS information, 10 transmission format information, transmission power control information, information on Cyclic Shift of Demodulation RS, and a CQI request. [0064] In the fifth aspect, the first transmitter unit can be 15 configured to determine the range on the basis of a data type. ADVANTAGEOUS EFFECTS OF INVENTION [0065] As described above, the present invention is capable of 20 reducing the probability of the occurrence of the False Alarm of uplink scheduling grants in the "Persistent scheduling". As a result, the present invention is capable of providing a stable and efficient mobile communication method, a mobile station, and a radio base station. 25 BRIEF DESCRIPTION OF DRAWINGS [0066] [FIG. 1] FIG. 1 is a functional block diagram of a mobile station according to a first embodiment of the present 18 invention. [FIG. 2] FIG. 2 is a diagram for illustrating an uplink scheduling grant in a mobile communication system according to the first embodiment of the present invention. 5 [FIG. 3] FIG. 3 is a diagram for illustrating scheduling performed in the mobile communication system according to the first embodiment of the present invention. [FIG. 4] FIG. 4 is a functional block diagram of a radio base station according to the first embodiment of the present 10 invention. [FIG. 5] FIG. 5 is a flowchart showing operations of the mobile station according to the first embodiment of the present invention. 15 DESCRIPTION OF EMBODIMENTS [0067] (Configuration of Mobile Communication System according to First Embodiment of Present Invention) Referring to FIG. 1, a configuration of a mobile 20 communication system according to a first embodiment of the present invention is described. In this embodiment, a description is given using a mobile communication system of the LTE scheme as an example, but the present invention is also applicable to mobile communication systems of other modes. 25 [0068] In the mobile communication system according to the embodiment, a mobile station UE is conf igured to transmit uplink data to a radio base station eNB in a predetermined cycle by using a PUSCH (uplink radio resource) persistently assigned, 19 the transmission starting at an assignment starting time. [0069] Specifically, in the mobile communication system according to this embodiment, a mobile station UE is configured 5 to transmit uplink data toa radiobase stationbyusinganuplink radio resource assigned thereto in a predetermined cycle by predetermined scheduling information. [0070] As shown in FIG. 1, the mobile station UE includes a 10 Persistent information receiver unit 11, a Persistent assignment signal receiver unit 12, and an uplink data transmitter unit 13. [0071] The Persistent information receiver unit 11 is configured 15 to receive, from the radio base station eNB, Persistent information including the predetermined cycle and the information on the uplink radio resource. [0072] In addition, the Persistent information receiver unit 11 20 is configured to notify, to the Persistent assignment signal receiver unit 12, the information on the uplink radio resource. [0073] Specifically, the Persistent information receiver unit 11 is configured to acquire the Persistent information, on the 25 basis of an RRC message transmitted by the radio base station eNB. [0074] Here, the information on an uplink radio resource is, for example, information for limiting a range of information to be 20 notif ied by a persistent assignment signal (i. e., predetermined scheduling information) to be described later, i.e., a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the 5 "Persistent scheduling". [0075] Hereinafter, a description will be further given in detail. [0076) 10 The information elements of the PDCCH (uplink scheduling grant) giving the instruction of persistent assignment are information elements as shown in FIG. 2, for example. [0077] "Format Indicator" is information indicating whether the 15 PDCCH is information for uplink or information for downlink. The information for downlink is also called simplified downlink control information. [0078] "Hopping flag" is information indicating whether or not 20 hopping is applied to an uplink signal the transmission of which is instructed by the PDCCH. [0079] "RB assignment information" is information indicating resource block assignment information for the uplink signal the 25 transmission of which is instructed by the PDCCH. [0080] "MCS information" is information on an MCS for the uplink signal the transmission of which is instructed by the PDCCH. Here, the information on the MCS is information such as a data 21 size, a modulation scheme, and a Redundancy Version parameter in HARQ, for example. [0081] "New Data Indicator" is information indicating whether 5 the uplink signal the transmission of which is instructed by the PDCCH is for new transmission or retransmission. [0082] "TPC" is information for uplink transmission power control for the uplink signal specified by the PDCCH. 10 [0083] "Cyclic shift for DMRS" is information on "Cyclic shift" of "Demodulation Reference signal" for the uplink signal specified by the PDCCH. [0084] 15 "CQI request" is information giving an instruction to transmit a CQI in the uplink. [0085] "RNTI/CRC" is CRC bits masked by an "UE-ID (RNTI)". [0086] 20 Note that, the aforementioned information elements of the PDCCH (uplink scheduling grant) are examples, and an information element other than the aforementioned information elements may be included in the PDCCH or some of the aforementioned information elements may not be included in the 25 PDCCH. [0087] In addition, the information on the uplink radio resource may be information for limiting the range of information to be notified by the aforementioned PDCCH (uplink scheduling grant) 22 as described below. [0088] For example, the information on the uplink radio resource may be information for limiting the range of information to be 5 notified by the aforementioned "RB assignment information". [0089] More specifically, the information on the uplink radio resource may be information for limiting the number of resource blocks to be notified by the aforementioned "RB assignment 10 information". [0090] Further, the information on the uplink radio resource may be information for limiting the number of resource blocks to be notified by the aforementioned "RB assignment information" 15 to "2" or "3". [0091] In this case, when the number of resource blocks notified by the PDCCH (uplink scheduling grant) is neither "2" nor "3", the information on the uplink radio resource and the information 20 (RB assignment information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. [0092] Further, the information on the uplink radio resource may be information for limiting the number of resource blocks to 25 be notified by the aforementioned "RB assignment information" to "3" or less. [0093] Specifically, the information on the uplink radio resource may be information to indicate the maximum value of 23 the number of resource blocks to be notified by the aforementioned "RB assignment information". [00941 In this case, when the number of resource blocks notified 5 by the PDCCH (uplink scheduling grant) is larger than "3", the information on the uplink radio resource and the information (RB assignment information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. [0095] 10 Note that, the information on the uplink radio resource indicates the maximum value of the number of resource blocks notified by the aforementioned "RB assignment information" in the aforementioned example, but the information on the uplink radio resource may indicate the minimum value of the number of 15 resource blocks instead. [00-96] Alternatively, the information on the uplink radio resource may indicate both the maximum and minimum values of the number of resource blocks to be notified by the 20 aforementioned "RB assignment information". [0097] For example, the information on the uplink radio resource may indicate "10" as the maximum value of the number of resource blocks to be notified by the aforementioned "RB assignment 25 information" and indicate "5" as the minimum value of the resource blocks. [0098] In this case, when the number of resource blocks notified by the PDCCH (uplink scheduling grant) is larger than "10" or 24 the number of the resource blocks is smaller than "5", the information on the uplink radio resource and the information (RB assignment information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. 5 [0099] Further, as far as the information on the uplink radio resource limits the range of information to be notified by the aforementioned "RB assignment information", the method for limiting the range is not limited to the aforementioned 10 "limitation of the number of resource blocks", and the information may limit, by use of another limitation method, the range of information to be notified by the aforementioned "RB assignment information". [0100] 15 For example, the information on the uplink radio resource may be information for limiting a position in a frequency direction of a resource block to be notified by the aforementioned "RB assignment information". [0101] 20 Alternatively, the information on the uplink radio resource may be information for limiting information to be notified by the aforementioned "MCS information", for example. The information on the uplink radio resource may be information for limiting the range of a modulation scheme, a data size, or 25 the like, for example. [0102] More specifically, the information on the uplink radio resource may be information for limiting the modulation scheme to be notified by the aforementioned "MCS information". 25 [0103] For example, the information on the uplink radio resource may be information for limiting the modulation scheme to be notified by the aforementioned "MCS informationent" to "QPSK". 5 (0104] In this case, when the modulation scheme notified by the PDCCH (uplink scheduling grant) is other than "QPSK", for example, when the modulation scheme is "16QAM", the information on the uplink radio resource and the information (MCS 10 information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. [0105] Note that, the aforementioned example illustrates an example in which the information on the uplink radio resource 15 limits the modulation scheme to be notified by the "MCS informationest" to "QPSK". However, the information on the uplink radio resource may limit the modulation scheme to be notified by the "MCS informationent" to "16QAM", to "64QAM", or to the both of "QPSK" and "16QAM", instead. 20 [0106] More specifically, the information on the uplink radio resource may indicate whether it is applied or not on-each of the modulation schemes, "QPSK", "16QAM", and "64QAM" to be notified by the "MCS informationent". 25 [0107] Alternatively, the information on the uplink radio resource may be information for limiting a data size to be notified by the "MCS information", for example. [0108] 26 For example, the information on the uplink radio resource may be information for limiting the data size to be notified by the "MCS informationent" to "320 bits". [0109] 5 In this case, when the data size notified by the PDCCH (uplink scheduling grant) is other than "320 bits", e.g., when the data size is "512 bits", the information on the uplink radio resource and the information (MCS information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each 10 other. [0110] Note that, the aforementioned value, "320 bits", is only an example, and the number of bits other than "320 bits" may be specified. 15 [0111] In addition, one kind of data size is specified in the aforementioned example, but two or more kinds of data sizes may be specified. [0112] 20 Specifically, the information on the uplink radio resource may be information for limiting the data size notified by the "MCS informationent" to "320 bits" and "640 bits", for example. [0113] 25 Alternatively, the information on the uplink radio resource may be information for limiting the data size notified by the "MCS informationent" to "320 bits" or less, for example. [0114] In this case, when the data size notified by the PDCCH 27 (uplink scheduling grant) is larger than "320 bits", e.g., when the data size is "512 bits", the information on the uplink radio resource and the information (MCS information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each 5 other. [0115] Note that, the aforementioned value, "320 bits", is only an example, and the number of bits other than "320 bits" may be specified. In addition, the maximum value of the data size 10 is specified in the aforementioned example, but the minimum value of the data size may be specified, instead. [01161 Alternatively, both of the maximum value and the minimum value of the data size maybe specified. For example, "640 bits" 15 may be specified as the maximum value of the data size, and "320 bits" may be specified as the minimum value of the data size. [0117] In this case, when the data size notified by the PDCCH (uplink scheduling grant) is larger than "640 bits" or the data 20 size is smaller than "320 bits", the information on the uplink radio resource and the information (MCS information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. [0118] 25 Note that, the aforementioned example shows a case where the information notified by "RB assignment information" or the information notified by "MCS information" is limited by the information on the uplink radio resource, but an information element other than the aforementioned elements may be limited 28 by the information on the uplink radio resource by the same method, instead. [0119] In addition, "RB assignment information" or "MCS 5 information" described above is information relating to resource blocks, or information relating to a modulation scheme or a data size, so that "RB assignment information" or "MCS information" may be called "information relating to transmission format". 10 [0120] The Persistent assignment signal receiver unit 12 is configured to receive a persistent assignment signal from the radio base station eNB. [0121] 15 Specifically, the Persistent assignment signal receiver unit 12 is configured to receive, from the radio base station eNB, PDCCH (uplink scheduling grant), as a persistent assignment signal, the PDCCH (uplink scheduling grant) being transmitted to the mobile station itself and giving an 20 instruction to persistently assign a PUSCH (uplink radio resource) for the "Persistent scheduling". [0122] For example, the Persistent assignment signal receiver unit 12 may be configured to determine, on the basis of an RNTI 25 or the like set in a PDCCH, whether or not a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" is transmitted to the mobile station itself. 29 [0123] Instead, the Persistent assignment signal receiver unit 12 may be configured to determine, on the basis of an RNTI or the like set in a PDCCH, whether or not the received PDCCH is 5 a PDCCH dynamically assigning a PUSCH (uplink radio resource), i.e., an uplink scheduling grant for the dynamic scheduling. [0124) Here, consider a case where, as a Persistent scheduling method in the LTE scheme, it is defined to determine on the basis 10 of one specific bit in a PDCCH whether the PDCCH is a PDCCH. (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling", or a PDCCH dynamically assigning a PUSCH (uplink radio resource) , i.e. , an uplink scheduling grant 15 for the Dynamic scheduling. In this case, the Persistent assignment signal receiver unit 12 may be configured to determine on the basis of the one bit whether the PDCCH is a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for 20 the "Persistent scheduling", or a PDCCH dynamically assigning a PUSCH (uplink radio resource), i.e., an uplink scheduling grant for the Dynamic scheduling. [0125] Alternatively, consider a case where, as a Persistent 25 scheduling method in an LTE scheme, it is defined that a part of the information elements in a PDCCH indicates whether the PDCCH is a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling", or a PDCCH dynamically assigning 30 a PUSCH (uplink radio resource), i.e., an uplink scheduling grant for Dynamic scheduling. In this case, the Persistent assignment signal receiver unit 12 may be configured to determine on the basis of the part of the information elements 5 in the PDCCH whether the PDCCH is a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling", or a PDCCH dynamically assigning a PUSCH (uplink radio resource), i.e., an uplink scheduling grant for Dynamic scheduling. 10 [0126] In addition, the Persisten assignment signal receiver unit 12 is configured to receive information on the uplink radio resource from the Persistent information receiver unit 11. [01271 15 Here, the information on an uplink radio resource is, as described above, the information for limiting a range of information to be notified by the persistent assignment signal, i.e., a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for 20 the "Persistent scheduling". [0128] Further, the Persistent assignment signal receiver unit 12 determines whether or not the information on the uplink radio resource and the information to be notified by the persistent 25 assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" are inconsistent with each other. [0129] 31 When the Persistent assignment signal receiver unit 12 determines that the information on the uplink radio resource and the information to be notified by the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an 5 instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" are inconsistent with each other, the Persistent assignment signal receiver unit 12 discards the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent 10 assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling", which the Persistent assignment signal receiver unit 12 has determined as the signal transmitted to the mobile station itself. [0130] 15 Specifically, in this case, the Persistent assignment signal receiver unit 12 regards that the information notified by the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the 20 "Persistent scheduling" has not been transmitted to the mobile station itself. [0131] In the aforementioned processing, the Persistent assignment signal receiver unit 12 provides the uplink data 25 transmitter unit 13 with the persistent assignment signal which is not discarded, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". [0132] 32 Hereinafter, an example will be shown of the processing as described above to discard the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for 5 the "Persistent scheduling". [0133) Consider a case where the information on the uplink radio resource is information to limit the number of resource blocks to be notified by the "RB assignment information" to "2" or "3", 10 for example. When the number of resource blocks notified by the PDCCH (uplink scheduling grant) is neither "2" nor "3" in this case, the Persistent assignment signal receiver unit 12 determines that the information on the uplink radio resource and the information (RB assignment information) notified by the 15 PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. [0134] Alternatively, consider a case where the information on the uplink radio resource is information to limit the number 20 of resource blocks to be notified by the "RB assignment information" to "3" or less, for example. When the number of resource blocks notified by the PDCCH (uplink scheduling grant) is larger than "3" in this case, e. g. , when the number of resource blocks is "5", the Persistent assignment signal receiver unit 25 12 determines that the information on the uplink radio resource and the information (RB assignment information) notif ied by the PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. [0135] 33 Alternatively, consider a case where the information on the uplink radio resource is information to limit the number of resource blocks to be notified by the "RB assignment information" to "10" or less, but at least "5", for example. 5 When the number of resource blocks notified by the PDCCH (uplink scheduling grant) is larger than "10" or smaller than "5" in this case, e.g., when the number of resource blocks is "12", the Persistent assignment signal receiver unit 12 determines that the information on the uplink radio resource and the 10 information (RB assignment information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. (0136] Alternatively, consider a case where the information on 15 the uplink radio resource is information to limit the modulation scheme to be notified by the "MCS information" to "QPSK", for example. When the modulation scheme notified by the PDCCH (uplink scheduling grant) is not "QPSK" in this case, e.g. , when the modulation scheme is "16QAM", the Persistent assignment 20 signal receiver unit 12 determines that the information on the uplink radio resource and the information (MCS information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. 25 [0137] Alternatively, consider a case where the information on the uplink radio resource is information to limit the data size to be notified by the "MCS information" to "320 bits", for example. When the data size notified by the PDCCH (uplink 34 scheduling grant) is not "320 bits" in this case, e.g., when the data size is "1024 bits", the Persistent assignment signal receiver unit 12 determines that the information on the uplink radio resource and the information (MCS information) notified 5 by the PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. [0138] Alternatively, consider a case where the information on 10 the uplink radio resource is information to limit the data size to be notified by the "MCS information" to "320 bits" or less, for example. When the data size notified by the PDCCH (uplink scheduling grant) is larger than "320 bits" in this case, e.g., when the data size is "512 bits", the Persistent assignment 15 signal receiver unit 12 determines that the information on the uplink radio resource and the information (MCS information) notified by the PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. 20 [0139] Alternatively, consider a case where the information on the uplink radio resource is information to limit the data size to be notified by the "MCS information" to "640 bits" or less, but at least "320 bits", for example. When the data size 25 notified by the PDCCH (uplink scheduling grant) is larger than "640 bits", or smaller than "320 bits" in this case, e.g., when the data size is "1024 bits", the Persistent assignment signal receiver unit 12 determines that the information on the uplink radio resource and the information (MCS information) notified 35 by the PDCCH (uplink scheduling grant) are inconsistent with each other. Thus, the PDCCH (uplink scheduling grant) is discarded. [0140] 5 Note that, in the aforementioned example, the Persistent assignment signal receiver unit 12 determines whether or not the information on the uplink radio resource and the information to be notified by the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of 10 persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" are inconsistent with each other. Instead, the Persistent assignment signal receiver unit 12 may determine whether or not an inconsistency other than the aforementioned inconsistencies exists. Then, when 15 determining that such an inconsistency exists, the Persistent assignment signal receiver unit 12 may discard the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". 20 [01411 For example, consider a case where the mobile station does not have a capability to support uplink "64QAM" transmission. When the Persistent assignment signal receiver unit 12 is given an instruction for "64QAM" transmission by the persistent 25 assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" in this case, the Persistent assignment signal receiver unit 12 may discard the persistent assignment signal, i.e., the PDCCH 36 (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". [0142] 5 Alternatively, consider a case where the mobile station has a capability to allow the maximum transmittable data size of "10000 bits". When the Persistent assignment signal receiver unit 12 is given an instruction for transmission of an uplink signal with a data size of "20000 bits" by the 10 persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling", the Persistent assignment signal receiver unit 12 may discard the persistent assignment signal, 15 i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". [0143] Meanwhile, generally, there is a bit pattern having no 20 meaning as information in the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". [0144] 25 Accordingly, when some bit pattern of the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" has no meaning as information, the Persistent assignment signal 37 receiver unit 12 may discard the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". 5 [0145] Note that, the expression "a bit pattern has no meaning as information" may be expressed differently that the bit pattern is not supposed to be notified. [0146] 10 In this case, the Persistent assignment signal receiver unit 12 may determine, regardless of the information on the uplink radio resource, whether or not some bit pattern of the persistent assignment signal, i.e., of the PDCCH (uplink scheduling grant) giving an instruction of persistent 15 assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" has meaning as information as described above. [0147] Alternatively, the Persistent assignment signal receiver 20 unit 12 may determine whether or not some bit pattern of the persistent assignment signal, i.e., of the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" has meaning as information as described 25 above, in a case where the information on the uplink radio resource does not exist. [0148] Here, an example of the aforementioned "bit pattern not supposed to be notified" will be described. 38 [0149] For example, when the value of the number of RBs indicated by "RB assignment information" shown in FIG. 2 is defined to be always "10" or less in the persistent assignment signal, a 5 bit pattern indicating a value larger than "10" as the number of RBs shown by the "RB assignment information" is considered to be a bit pattern not supposed to be notified. [0150] Specifically, the mobile station UE discards the 10 persistent assignment signal, when the value of the number of RBs indicated by the "RB assignment information" in the persistent assignment signal is larger than "10". [0151] Alternatively, in a case where the value of the data size 15 indicated by "MCS information" shown in FIG. 2 is defined to be always "1000" or less in the persistent assignment signal, for example, a bit pattern indicating a value larger than "1000" as the data size shown by the "MCS information" is considered to be a bit pattern not supposed to be notified. 20 [0152] Specifically, the mobile station UE discards the persistent assignment signal, when the value of the data size indicated by the "MCS information" in the persistent assignment signal is larger than "1000". 25 [0153] Note that, the 'case where the value of the data size indicated by the "MCS information" is larger than "1000"' may mean that a part of bits of the "MCS information" is not a predetermined value, for example. In a case where the data size 39 is defined by a four-digit binary number (described as "abcd" hereinafter where the first digit "a" corresponds to the "Most Significant bit"), the data size is described as follows when expressed by a decimal number. 5 [01541 (Data size expressed by a decimal number) = 23 x a + 22 x b + 21 x c + 20 x d Here, when "a", which is the "Most Significant bit", is not "0", i.e., when "a" is "1", the data size is at least "8". 10 [0155] Specifically, the mobile station UE may discard the persistent assignment signal, when a part of the bits of the "MCS information" in the persistent assignment signal is not a predetermined value. 15 [0156] More specifically, the mobile station UE may discard the persistent assignment signal, when the "Most Significant bit" of the "MCS information" in the persistent assignment signal is not a predetermined value (when the "Most Significant bit" 20 is not "0" in the aforementioned example, for example), or a predetermined number of bits consecutive from the "Most Significant bit" are not a predetermined value (for example, when neither "a" nor "b" is "0", suppose that the values of two consecutive bits are not a predetermined value in the 25 aforementioned example). [0157] Note that, the same processing may be applied when the "MCS information" indicates both of the data size and modulation scheme. 40 [0158] Alternatively, when the modulation scheme indicated by the "MCS information" shown in FIG. 2 is defined to be always "QPSK" in the persistent assignment signal, for example, a bit 5 pattern indicating "16QAM" or "64QAM" as the modulation scheme shown by the "MCS information" is considered to be a bit pattern not supposed to be notified. [01591 Specifically, the mobile station UE discards the 10 persistent assignment signal, when the modulation scheme indicated by the "MCS information" in the persistent assignment signal is not "QPSK". [0160] Alternatively, the persistent assignment signal is 15 basically a signal giving an instruction for new transmission. Thus, a bit pattern specifying a modulation scheme used in retransmission in the "MCS information", for example, is considered to be a bit pattern not supposed to be notified. [01611 20 Specifically, the mobile station UE discards the persistent assignment signal, when the "MCS information" in the persistent assignment signal indicates a bit pattern specifying a modulation scheme used in retransmission. [0162] 25 Alternatively, when it is defined that "1" is always set in the persistent assignment signal as the value of "TPC" shown in FIG. 2, for example, "0" as the value of "TPC" is considered to be a bit pattern not supposed to be notified. [0163] 41 Specifically, the mobile station UE discards the persistent assignment signal, when the value of "TPC" in the persistent assignment signal is "0". [01641 5 Note that, the number of bits for "TPC" is "1" in the aforementioned example, but the number of bits may be other than "1", e.g., "2" or "3". For example, when the number of bits for "TPC" is "2", and it is defined that "11" is always set as the value of TPC, bit patterns "10", "01", and "00" are 10 considered to be bit patterns not supposed to be notified. [0165] Alternatively, when it is defined that "1" is always set as the value of "Cyclic Shift for DMRS" shown in FIG. 2 in the persistent assignment signal, for example, "0" as the value of 15 the "Cyclic Shift for DMRS" is considered to be a bit pattern not supposed to be notified. [0166] Specifically, the mobile station UE discards the persistent assignment signal, when the value of the "Cyclic 20 Shift for DMRS" in the persistent assignment signal is "0". [0167] Note that, the number of bits for the "Cyclic Shift for DMRS" in the aforementioned example is "1", but the number of bits may be a value other than "1", e.g., "2" or "3". 25 [01681 Alternatively, when it is defined that "1" is always set as the value of "CQI request" shown in FIG. 2 in the persistent assignment signal, for example, "0" as the value of the "CQI request" is considered to be a bit pattern not supposed to be 42 notified. [0169] Specifically, the mobile station UE discards the persistent assignment signal, when the value of the "CQI 5 request" in the persistent assignment signal is "0". [0170] Alternatively, when it is defined that "1" is always set as the value of "New Data Indicator" shown in FIG. 2 in the persistent assignment signal, for example, "0" as the value of 10 the "New Data Indicator" is considered to be a bit pattern not supposed to be notified. [0171] Specifically, the mobile station UE discards the persistent assignment signal, when the value of the "New Data 15 Indicator" in the persistent assignment signal is "0". [0172] Alternatively, the mobile station UE may identify the aforementioned "bit pattern not supposed to be notified", on the basis of information in a persistent assignment signal 20 received in the past. [0173] For example, when the data size indicated by "MCS information" in a persistent assignment signal received in the past is always "320 bits", the mobile station UE may regard a 25 bit pattern indicating a data size other than "320 bits" as a bit pattern not supposed to be notified. [0174] Here, for example, it is considered that "False Alarm" happens when the mobile station UE is in a state where it has 43 not received a correct persistent assignment signal even once in the past. Consider a case where the mobile station UE has received a persistent assignment signal having the same data size at least "three times" in the past. In this case, the 5 mobile station UE may regard a bit pattern showing a data size other than the aforementioned data size as a bit pattern not supposed to be notified. [0175] Alternatively, in a case where the mobiles station UE has 10 consecutively received a persistent assignment signal having the same data size at least "three times" in the past, the mobile station UE may regard a bit pattern showing a data size other than the aforementioned data size as a bit pattern not supposed to be notified. 15 [01761 Note that, the numbers shown in the aforementioned example such as "320 bits" and "three times" are only examples, and the numbers may be values other than the values shown in the aforementioned example. 20 [0177] Note that, multiple of the aforementioned processing operations to discard the PDCCH (downlink scheduling) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" may be applied 25 simultaneously. [0178] Specifically, when multiple processing operations to discard the PDCCH giving the instruction of persistent assignment are performed, and when the PDCCH is determined to 44 be discarded in at least one of the processing operations, the processing operation to discard the PDCCH may be performed. [0179] The uplink data transmitter unit 13 is configured to 5 transmit uplink data tobe transmitted via a PUSCH (uplink radio resource) assigned by a PDCCH. [0180] Specifically, the uplink data transmitter unit 13 is configured to determine an uplink transmission sub-frame as the 10 aforementioned "assignment starting time", when receiving from the Persistent assignment signal receiver unit 12, the aforementioned Persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving the instruction of persistent assignment of a PUSCH . (uplink radio resource) for the 15 "Persistent scheduling", the uplink transmission sub-frame specified by the PDCCH. The uplink data transmitter unit 13 is configured then to start persistent transmission of the uplink data via the PUSCH (uplink radio resource) for the "Persistent scheduling" in the aforementioned "predetermined 20 cycle" at the "assignment starting time". [0181] In the example shown in FIG. 3, the uplink data transmitter unit 13 is configured to transmit, once the Persistent assignment signal receiver unit 12 has received the persistent 25 assignment signal in a sub-frame #3 via the PDCCH, the uplink data via a PUSCH (uplink radio resource) mapped to a resource block (aggregate of sub-carriers) in an uplink transmission sub-frame #7 specified by the PDCCH. [0182] 45 Furthermore, the uplink data transmitter unit 13 is configured to transmit uplink data via a PUSCH (uplink radio resource) mapped to a resource block (aggregate of sub-carriers) specified by the PDCCH in the cycle of 20 ms, the 5 transmission starting at the sub-frame #7. [0183] That is, the uplink data transmitter unit 13 is configured to transmit uplink data via a PUSCH (uplink radio resource) mapped to a resource block (aggregate of sub-carriers) 10 specified by the PDCCH in sub-frames #7, #27, #47,. [0184] On the other hand, the radio base station eNB according to the present invention is configured to notify, to the mobile station UE, the predetermined cycle and the information on an 15 uplink radio resource. [0185] Since the description related to such information as the information on the uplink radio resource is the same as the description given for the mobile station UE, the description 20 thereof is omitted herein. [0186] As shown in FIG. 4, the radio base station eNB includes a Persistent information transmitter unit 21, a Persistent assignment signal transmitter unit 22, and an uplink data 25 receiver unit 23. [0187] The Persistent information transmitter unit 21 is configured to transmit, to the mobile station UE, Persistent information (persistent communication information) including 46 the predetermined cycle and information on an uplink radio resource. (0188] Specifically, the Persistent information transmitter 5 unit 21 is configured to notify, to the mobile station UE, the Persistent information by using an RRC message. (0189] Here, the information on the uplink radio source is the information for limiting a range of information to be notified 10 by a persistent assignment signal, i.e., a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". [0190] 15 Since the description of the information on the uplink radio resource is the same as the description given for the mobile station UE, the description thereof is omitted herein. [0191] Here, the Persistent information transmitter unit 21 may 20 set information on the uplink radio resource on the basis of a data type. [0192] For example, when the data type is VoIP, the Persistent information transmitter unit 21 may set the information on the 25 uplink radio resource to be information to limit the number of resource blocks to be notified by the "RB assignment information" to "3" or less. In addition, when the data type is streaming, the Persistent information transmitter unit 21 may set the information on the uplink radio resource to be 47 information to limit the number of resource blocks to be notified by the "RB assignment information" to "10" or less. [0193] Alternatively, when the data type is VoIP, the Persistent 5 information transmitter unit 21 may set the information on the uplink radio resource to be information to limit the modulation scheme to be notified by the "MCS information" to "QPSK". In addition, when the data type is streaming, the Persistent information transmitter unit 21 may set the information on the 10 uplink radio resource to be information to limit the modulation scheme to be notified by the "MCS information" to "QPSK" or "16QAM". [0194] Alternatively, when the data type is VoIP, the Persistent 15 information transmitter unit 21 may set the information on the uplink radio resource to be information to limit the data size to be notified by the "MCS information" to "320 bits". In addition, when the data type is streaming, the Persistent information transmitter unit 21 may set the information on the 20 uplink radio resource to be information to limit the data size to be notified by the "MCS information" to "640 bits". [0195] Specifically, how the information to be notified by the persistent assignment signal, i.e., the PDCCH (uplink 25 scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" is limited may be determined on the basis of a data type of data for which the resource is assigned by the Persistent scheduling. 48 [0196] Note that, the aforementioned "data type" may be termed as a "service type". Specifically, the "service type" is information indicating a type of packet transmission service. 5 Thus, the "service type" may include a VoIP service, voice service, streaming service, FTP (File Transfer Protocol) service, and the like, for example. [0197] In the aforementioned example, the Persistent 10 information transmitter unit 21 sets information on the uplink radio resource on the basis of a "data type", but may set information on the uplink radio resource on the basis of a "contract type", a "logical channel type", a "cell type", or a "priority type" instead of the "data type". 15 [0198] In addition, the "contract type" shows a type of contract subscribed by the user of the mobile station UE and includes a Low Class contract or High Class contract, or a flat rate contract or volume charging contract or the like, for example. 20 [0199] In addition, the "cell type" shows an operation situation of the cell, and an indoor or outdoor situation, and an urban area or rural area situation are conceivable. [0200] 25 The "logical channel type" is a type of logical channel such as Dedicated Control Channel (DCCH) or Dedicated Traffic Channel (DTCH). Multiple channels may be further defined in the DCCH or DTCH. [0201] 49 Here, "Radio Bearer" means a bearer that transmits data and is defined to have a one-to-one relationship with a logical channel through which the data is transmitted. As a result, the bearer has approximately the same meaning as the logical 5 channel. [0202] The "priority type" is a class to categorize priorities relating to uplink and downlink data transmission into classes. For example, data with a first priority class is transmitted 10 more preferentially than data with a second priority class. [0203] The "priority type" may be combined with a logical channel, and then called a "Logical Channel Priority". Alternatively, the "priority type" may be defined as "Priority Class". 15 [0204] The Persistent assignment signal transmitter unit 22 is configured to transmit a persistent assignment signal to the mobile station UE. [0205] 20 Specifically, the Persistent assignment signal transmitter unit 22 is configured to transmit, to the mobile station UE, the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling", as a persistent 25 assignment signal. [0206] Note that, when it is defined that "1" is always set as the value of "TPC (refer to FIG. 2) " in the persistent assignment signal as described above, the Persistent assignment signal 50 transmitter unit 22 may always set "1" as the value of the "TPC". [0207] Alternatively, when it is defined that "1" is always set as the value of "Cyclic Shift for DMRS (refer to FIG. 2)" in 5 the persistent assignment signal as described above, for example, the Persistent assignment signal transmitter unit 22 may always set "1" as the value of the "Cyclic Shift for DMRS". [0208] Alternatively, when it is defined that "1" is always set 10 as the value of "CQI request (refer to FIG. 2) " in the persistent assignment signal as described above, for example, the Persistent assignment signal transmitter unit 22 may always set "1" as the value of the "CQI request". [0209] 15 Alternatively, when it is defined that "1" is always set as the value of "New Data Indicator (refer to FIG. 2) " in the persistent assignment signal as described above, for example, the Persistent assignment signal transmitter unit 22 may always set "1" as the value of the "New Data Indicator". 20 [0210] The uplink data receiver unit 23 is configured to receive uplink data to be transmitted via a PUSCH (uplink radio resource) assigned by a PDCCH. [0211] 25 Specifically, the uplink data receiver unit 23 is configured to determine the uplink transmission sub-frame specified by the PDCCH to be the aforementioned "assignment starting time" when the aforementioned Persistent assignment signal is transmitted by the Persistent assignment signal 51 transmitter unit 22. The uplink data receiver unit 23 is configured then to start persistent reception of the uplink data via the PUSCH (uplink radio resource) for the "Persistent scheduling" in the aforementioned "predetermined cycle", the 5 reception starting at the "assignment starting time". [0212) (Operation of Mobile Communication System according to First Embodiment of Present Invention) Referring to FIG. 5, an operation of the mobile 10 communication system according to the first embodiment of the present invention is described. [0213] As shown in FIG. 5, in step S101, the mobile station UE receives, by way of an RRC message or the like, Persistent 15 information including the aforementioned predetermined cycle and the information on the uplink radio resource from the radio base station eNB. [0214] Note that, the information on the uplink radio resource 20 is, for example, information for limiting a range of information to be notified by a persistent assignment signal, i .e. , a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". 25 [0215] The description of the information on the uplink radio resource is the same as that for the mobile station UE. Thus, the description thereof is omitted herein. [0216] 52 In the step S102, the mobile station UE receives the Persistent assignment signal transmitted by the radio base station eNB via the PDCCH. [0217) 5 More specifically, the mobile station UE receives, as the persistent assignment signal, a PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" from the radio base station eNB. 10 [0218] In step S103, the mobile station UE determines whether or not the information on the uplink radio resource and the informationnotifiedby the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of 15 persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" are inconsistent with each other. [02191 Here, a detailed description of the aforementioned processing to determine whether or not an inconsistency exists 20 is omitted herein because the description thereof is the same as that in the case of the mobile station UE. [02201 In a case where the mobile station UE determines that the information on the uplink radio resource and the information 25 notified by the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" are inconsistent with each other (step S103: YES), the operation proceeds to step S104. 53 [0221] In step S104, the mobile station UE discards the persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of persistent 5 assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". [0222] Specifically, the mobile station UE regards the information notif ied by the persistent assignment signal, i. e. , 10 the PDCCH (uplink scheduling grant) giving an instruction of persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling" as information that has not been transmitted to the mobile station UE itself. [0223] 15 In step S105, the mobile station UE determines an uplink transmission sub-frame as the aforementioned assignment starting time, the uplink transmission sub-frame specified by the aforementioned Persistent assignment signal, i.e., the PDCCH (uplink scheduling grant) giving an instruction of 20 persistent assignment of a PUSCH (uplink radio resource) for the "Persistent scheduling". The mobile station UE then starts persistent uplink data transmission via the PUSCH (uplink radio resource) for the "Persistent scheduling" in the aforementioned predetermined cycle, the transmission starting at the 25 assignment starting time in step S105. [0224] Specifically, in this case, the mobile station UE performs the uplink data transmission via the PUSCH (uplink radio resource) for the "Persistent scheduling", until the 54 aforementioned PUSCH (uplink radio resource) for the "Persistent scheduling" is released. [0225] (Advantageous Effect of Mobile Communication System According 5 to First Embodiment of the Present Invention) As described above, the probability of the occurrence of the False Alarm for one PDCCH (uplink scheduling grant or downlink scheduling grant information) is 1/2'6. [0226] 10 In general, the mobile stationUE attempts to decode about 40 PDCCHs in a single sub-frame, the total probability of the occurrence of the False Alarm is calculated as 40 x 1/216 0.0006. [0227] 15 Here, the False Alarm described above is a phenomenon in which the mobile station UE incidentally determines that a PDCCH is transmitted to the mobile station UE itself although the PDCCH is not transmitted to the mobile station UE itself. Thus, the decoded information in this case is highly likely to be 20 nonsense information. [0228] Accordingly, as described above, a limitation is provided in the range of information in a PDCCH, and when the mobile station UE receives a PDCCH having information outside the 25 limited range, the mobile station UE performs processing to discard the PDCCH. Thus, the probability of the occurrence of the False Alarm can be significantly reduced. [0229] For example, suppose that the number of bits in a PDCCH 55 other than CRC is 24 bits, and a 12-bit range among the 24 bits in the PDCCH is limited. For the sake of simplicity of calculation, suppose that the bit pattern of 12 bits is limited to a single kind. 5 [0230] In this case, as described above, a limitation is provided in the range of information in the PDCCH, and when the mobile station UE receives a PDCCH having information outside the limited range, the mobile station UE performs processing to 10 discard the PDCCH. Thus, the probability of the occurrence of the False Alarm is calculated as follows: 40 x 1/216 x 1/212/224 = 1.5 x 10~7. Thus, the probability of the occurrence of False Alarm is made much smaller in this case. 15 [0231] Specifically, the mobile communication system according to the first embodiment of the present invention is capable of reducing the probability of the occurrence of the "False Alarm" of a PDCCH (uplink scheduling grant) indicating a resource 20 assignment for the Persistent scheduling. As a result, the mobile communication system according to the first embodiment of the present invention is capable of providing a stable and efficient mobile communication method, a mobile station, and a radio base station. 25 [0232] (Modification) Note that operation of the above described mobile station UE and the radio base station eNB may be implemented by means of hardware, a software module executed by a processor, or a 56 combination of both. [02331 The software module may be provided in any type of storage medium such as an RAM (Random Access Memory) , a flash memory, 5 a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM), a register, a hard disk, a removable disk, or a CD-ROM. [02341 The storage medium is connected to the processor so that 10 the processor can read and write information from and to the storage medium. Also, the storage medium may be integrated into the processor. Also, the storage medium and the processor may be provided in an ASIC. The ASIC may be provided in the mobile station UE and the radio base station eNB. Also, the storage 15 medium and the processor may be provided in the mobile station UE and the radio base station eNB as a discrete component. [02351 Hereinabove, the present invention has been described in detail using the above embodiment; however, it is apparent to 20 those skilled in the art that the present invention is not limited to the embodiment described herein. Modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Thus, what 25 is described herein is for illustrative purpose, and has no intention whatsoever to limit the present invention. 57