RU2503154C2 - Mobile communication method, mobile station and radio base station - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: in the mobile communication method according to the present invention, a mobile station (UE) receives downlink data transmitted from a radio base station using a downlink radio communication resource assigned to the mobile station through given scheduling information in a given cycle. The method includes a step (A) of transmitting to the mobile station (UE) a given cycle and downlink radio communication resource information, step (B) of transmitting to the mobile station (UE) given scheduling information and step (C) of receiving downlink data in a given cycle using the downlink radio communication resource assigned through the given scheduling information, wherein reception begins at a specific moment in time defined based on the received scheduling information. At step (C), the given scheduling information is discarded when downlink radio communication resource information and information transmitted through the given scheduling information contradict each other.

EFFECT: low probability of false signalling.

17 cl, 5 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a mobile communication method in which a mobile station receives downlink data transmitted from a radio base station in a predetermined cycle by using a downlink radio resource assigned to the mobile station on a long-term basis, wherein reception starts at the designated start time. The present invention also relates to a mobile station and a radio base station.

State of the art

At present, the 3GPP organization, which is a W-CDMA standardization group, as a receiver of a wideband code division multiple access (W-CDMA) scheme and a high-speed downlink packet data network (HSDPA, High Speed Downlink Packet Access) examines the LTE (Long Term Evolution) scheme and develops its specifications.

The use of OFDMA (Orthogonal Frequency Division Multiplexing Access) in downlink and SC-FDMA (Single-Carrier Frequency Division Multiple Access, Frequency Division Multiple Access) schemes are considered as an LTE radio access method. in the uplink.

An OFDM scheme is a method of dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and transmitting data in respective divided frequency bands. In this method, by densely positioning the subcarriers on the frequency axis so that the subcarriers partially overlap but do not interfere with each other, high-speed transmission is achieved and frequency efficiency is improved.

The SC-FDMA scheme is a transmission method that reduces the interference caused by terminals by dividing the frequency band and transmitting using different frequency bands for multiple terminals. The SC-FDMA scheme reduces fluctuations in transmit power, which reduces terminal power consumption and increases coverage.

An LTE scheme is a system in which a plurality of mobile stations communicate with each other by sharing one or more physical channels in both uplink and downlink.

A channel shared by a plurality of user terminals is generally referred to as a common channel and in the LTE system is a physical uplink shared channel (PUSCH, Physical Uplink Shared Channel) in an uplink and a physical downlink shared channel (PDSCH, Physical Downlink Shared Channel) in a downlink communication lines.

In addition, as a transport channel, such a common channel is an uplink shared channel (UL-SCH, Uplink Shared Channel) in an uplink and a downlink shared channel (DL-SCH, Downlink Shared Channel) in a downlink.

In such a mobile communication system using the common channels described above, it is necessary to select which mobile station UE the common channel is to be assigned and to signal to the selected mobile station UE that it is assigned a common channel for each subframe (1 ms in the LTE scheme )

In the LTE scheme, the control channel used for signaling is called the Physical Downlink Control Channel (PDCCH) or L1 / L2 (Layer 1 / Layer 2, Level 1 / Level 2).

Moreover, the processing for each subframe performed to select the mobile station UE to which the common channel is to be assigned is generally called scheduling.

In this case, this processing may also be called dynamic scheduling, since the mobile station UE to which the common channel is assigned is selected dynamically for each subframe.

In addition, instead of the above expression “assignment of a common channel”, the expression “assignment of a radio resource for a common channel” can also be used.

The physical downlink control channel information includes, for example, downlink scheduling information, an uplink scheduling grant, and the like.

With respect to the downlink common channel, downlink scheduling information includes, for example, downlink resource block assignment information, mobile station identifiers (UEs), number of streams, precoding vector information, data amount, modulation scheme, hybrid automatic information retransmission request (HARQ, hybrid automatic repeat request), etc.

Moreover, with respect to the uplink shared channel, the uplink scheduling grant includes, for example, uplink resource block assignment information, mobile station identifiers (UEs), data amount, modulation scheme, uplink transmit power information, demodulation reference signal information when communicating in an uplink in a MIMO system (Multi-Input Multi-Output, a system with many inputs / outputs), etc.

It should be noted that the downlink scheduling information and the uplink scheduling grant described above may collectively be referred to as downlink control information (DCI).

It should also be noted that the mobile station uses the mobile station identifier (UE-ID (RNTI, Radio Network Temporary Identifier) in the uplink scheduling grant or in the downlink scheduling information to identify whether it is being transmitted to the the mobile station uplink scheduling grant or downlink scheduling information.

More specifically, the Cyclic Redundancy Check (CRC) bits included in the uplink scheduling grant or downlink scheduling information are encoded by the RNTI of the mobile station that is the target mobile transmission station.

The mobile station checks the cyclic checksum by using the CRC bits. After that, when the result of the cyclic checksum check is positive, the mobile station determines that an uplink scheduling grant or downlink scheduling information is transmitted to the mobile station. When the cyclic checksum check result is negative, the mobile station determines that no uplink scheduling grant or downlink scheduling information is being transmitted to the mobile station.

It should be noted that CRC bits are bits used to determine if a transmitted signal is correctly or incorrectly decoded.

Accordingly, when a specific mobile station receives a signal in which CRC bits are encoded by the RNTI of another mobile station, the result of the cyclic checksum check becomes negative, even if the signal is received without errors.

In addition, the number of bits for the CRC bits and the RNTI is, for example, sixteen.

It should be noted that the mobile station as a whole is trying to decode 40 uplink scheduling grants or 40 units of downlink scheduling information, for example, in one subframe.

In this case, approximately 40 uplink scheduling grants or 40 downlink scheduling information units include, for example, a signal actually transmitted to a given mobile station, a signal transmitted to another mobile station, a signal including only noise and not containing a transmitted signal, etc.

On the other hand, in the implementation of long-term planning, which is being studied for the implementation of voice packet communication (VoIP) and the like, the radio base station eNB is configured to long-term assign a radio resource of uplink or downlink (PUSCH or PDSCH) mobile stations in a given cycle, starting with a subframe (assigned initial time) indicated by the PDCCH (uplink scheduling grant or downlink scheduling information element ) It should be noted that long-term planning (persistent scheduling) can be called semi-long-term planning (semi-persistent scheduling).

In this case, the designated starting time is a subframe in which downlink scheduling information is transmitted in the case of a downlink, and an uplink transmitted subframe indicated by an uplink scheduling grant in the case of an uplink. In addition, the predetermined cycle is, for example, 20 ms.

In long-term planning, the uplink scheduling grant or downlink scheduling information is transmitted via the PDCCH only for the initial signal transmission, and for signal transmission after the initial signal transmission, the uplink scheduling grant or downlink scheduling information is not transmitted through the PDCCH. Thus, the radio resources (overhead) required for transmitting uplink scheduling grants or downlink scheduling information can be reduced. As a result, effective communication can be provided.

It should be noted that, as described above, there are two types of uplink scheduling grant or downlink scheduling information. One of these types is designed to notify the mobile station of the resource assignment through dynamic planning, and the other type is intended to notify the mobile station of the resource assignment by means of long-term planning.

In this case, the identification of whether the assignment is performed by dynamic scheduling or by long-term scheduling described above is performed based on an RNTI or the like, for example, an RNTI identifier specified in an uplink scheduling grant or downlink scheduling information.

More specifically, an RNTI identifier for dynamic scheduling and an RNTI identifier for long-term scheduling are determined, and identification of whether an assignment is made through dynamic scheduling or through long-term scheduling is performed based on the result of checking the cyclic checksum of the corresponding RNTI.

As described above, the identification of whether the uplink scheduling grant or downlink scheduling information is notified to the mobile station of the assignment by means of dynamic scheduling or long-term scheduling is performed based on the RNTI identifier and the like, and the RNTI identifier is specified in the uplink scheduling grant communication or downlink scheduling information.

In addition, the mobile station attempts to decode approximately 40 uplink scheduling grants or 40 downlink scheduling information elements in one subframe (within 1 ms).

Moreover, since the number of CRC bits and the number of RNTI bits is sixteen, a false alarm occurs with a probability of 1/2 ¹⁶ . Accordingly, when 40 uplink scheduling grants or 40 downlink scheduling information elements are subject to decoding, the probability of a false alarm is 1/2 ¹⁶ × 40.

In this case, a false alarm is a phenomenon in which, even when the base station does not transmit the uplink scheduling grant to the mobile station and does not transmit downlink scheduling information to the mobile station, the mobile station determines that the uplink scheduling grant is transmitted to the mobile station communication lines or downlink scheduling information.

In the case of resource assignment by, for example, dynamic scheduling, the effect of false alarms is small, since resource assignment by grant of uplink scheduling or downlink scheduling information is essentially limited to the corresponding subframe.

However, in the case of assigning a resource through long-term planning, the effect of false alarms is significant, since the designated starting time is indicated by an uplink scheduling grant or downlink scheduling information, and a radio resource is assigned periodically and long-term, starting from an assigned starting time by uplink scheduling grant; or downlink scheduling information.

It should be noted that the false alarm problem described above can likewise occur in the case of a configuration in which, instead of the RNTI, based on a specific one bit in the PDCCH, it is determined whether this one bit is a PDCCH prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, or by a PDCCH dynamically assigning a PDSCH (downlink radio resource) for conventional downlink scheduling .

Disclosure of invention

Thus, the present invention has been made in view of the above problem, and an object of the present invention is to provide a stable and efficient communication method, a mobile station and a radio base station, to reduce the likelihood of a false signaling of downlink scheduling information in long-term scheduling.

In a first aspect of the present invention, there is provided a mobile communication method in which a mobile station receives downlink data transmitted from a radio base station in a predetermined cycle by using a downlink radio resource on a long-term basis of a designated mobile station, the reception starting at the designated starting time including the step (A1) of transmission from the radio base station to the mobile station of a given cycle and uplink radio resource information, step (B1) is determined if the mobile station has a designated start time and the start of receiving downlink data via a downlink radio resource at a designated start time when receiving a long-term signal from a radio base station, and in step (B1), the mobile station discards the long-term signal if information about the downlink radio resource and the information transmitted by the long-term signal are conflicting.

In other words, in a first aspect of the present invention, there is provided a mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station through predetermined scheduling information in a predetermined cycle including a step ( A2) transmitting to the mobile station a predetermined cycle and downlink radio resource information, step (B2) of transmitting the specified information to the mobile station of the plan step and step (C2) of receiving downlink data in a given cycle by using the downlink radio resource assigned by the given scheduling information, wherein reception starts at a specific moment determined based on the received given scheduling information, and in step (C2), the specified information scheduling is discarded if the downlink radio resource information and the information transmitted by the predetermined scheduling information contradict each other.

In a first aspect, a predetermined downlink cycle and radio resource information may be transmitted via an RRC message, and a long-term signal may be transmitted via a downlink control channel.

In other words, in the first aspect, in step (A2), the predetermined downlink radio resource and information can be transmitted via the RRC message, and in step (B2), the predetermined scheduling information can be transmitted to the mobile station via the downlink control channel.

In a first aspect, the range of information to be indicated by a long-term signal can be limited by information on a downlink radio resource, and in step (B1), if information transmitted by a long-term signal is outside the limited range of information to be indicated by means of a long-term signal, the mobile station can determine that the downlink radio resource information and the information transmitted by long signal, contradict each other.

In other words, in the first aspect, in step (A2), the range of information indicated by the predetermined scheduling information can be limited by the downlink radio resource information, and in step (C2), if the information included in the preset scheduling information is outside the range range limited by the downlink radio resource information, it can be determined that the downlink radio resource information and information transmitted by a predetermined infor Planning movements contradict each other.

In a first aspect, a long-term assignment signal, in other words, predetermined scheduling information, may include at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, redundancy information transmission format, transmission power control information, HARQ request information, new data indicator.

In a second aspect of the present invention, there is provided a mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station through predetermined scheduling information in a predetermined cycle including a transmission step (A) to the mobile station of a given cycle and downlink radio resource information, step (B) of transmitting to the mobile station predetermined scheduling information and step (C) p transmitting downlink data in a predetermined cycle by using a downlink radio resource assigned by a predetermined scheduling information, wherein the transmission starts at a specific moment determined based on the received predetermined scheduling information, step (C) being performed if the information included in the predetermined information planning, coincides with pre-specified content.

In a second aspect, predetermined scheduling information may include at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, transmission format information, transmission power control information, HARQ request information, new data indicator.

In a third aspect of the present invention, there is provided a mobile station configured to receive downlink data transmitted from a radio base station in a predetermined cycle by using a downlink radio resource on a long-term basis of a designated mobile station, the reception starting at the designated starting time, including module for receiving long-term communication information, configured to receive a given cycle and radio resource information from a radio base station a downlink, and a communication module configured to determine an assigned start point in time and start receiving downlink data by a downlink radio resource at a designated start time point when receiving a long-term destination signal from a radio base station, wherein the communication module is discarded a long-term signal if the downlink radio resource information and information transmitted by the long-term signal Assigning to contradict each other.

In other words, in a third aspect of the present invention, there is provided a mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to a mobile station by predetermined scheduling information in a predetermined cycle, including a receiver module configured with the possibility of receiving from the radio base station a given cycle and information about the radio resource of the downlink, and the communication module, made with the possibility of receiving downlink data in a given cycle by using the downlink radio resource assigned by the specified scheduling information, the reception starts at a specific moment determined based on the set scheduling information received from the radio base station, the communication module being configured to discarding predetermined scheduling information if the downlink radio resource information and information transmitted by the predetermined information and planning, inconsistent with each other.

In a third aspect, a predetermined downlink cycle and radio resource information may be transmitted via an RRC message, and a long-term signal may be transmitted via a downlink control channel.

In other words, in a third aspect, the receiving module may be configured to receive a predetermined cycle and downlink radio resource information via an RRC message, and the communication module may be configured to receive predetermined scheduling information via a downlink control channel.

In a third aspect, the communication module may be configured to determine that the radio resource information and the information transmitted by the predetermined scheduling information contradict each other if the information included in the predetermined scheduling information is outside the range of information indicated by the predetermined information scheduling, the range being limited by the downlink radio resource information.

In a third aspect, a long-term assignment signal, in other words, predetermined scheduling information, may include at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, redundancy information transmission format, transmission power control information, HARQ request information, new data indicator.

In a fourth aspect of the present invention, there is provided a mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to a mobile station by predetermined scheduling information in a predetermined cycle, including a receiving module configured to receive from a radio base station of a given cycle and downlink radio resource information, and a communication module configured to the function of receiving downlink data in a given cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein reception starts at a particular moment determined based on the preset scheduling information received from the radio base station, the communication module being adapted to receive downlink data if the information transmitted by the predetermined scheduling information matches the predetermined content.

In a fourth aspect, predetermined scheduling information may include at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, transmission format information, transmission power control information, HARQ request information, new data indicator.

In a fifth aspect of the present invention, there is provided a radio base station for use in a mobile communication system in which a mobile station receives downlink data transmitted from a radio base station in a predetermined cycle by utilizing a downlink radio resource on a long-term basis to an assigned mobile station, moreover, the reception begins at the designated initial time, including a module for transmitting information of long-term communication, configured to transmit to the mobile station of a predetermined cycle and downlink radio resource information, a long-term signal transmission module configured to transmit a long-term signal to the mobile station, and a communication module configured to start transmitting downlink data via the downlink radio resource to the designated the initial moment of time determined by the long-term signal, and the module for transmitting long-term communication information is made with possible the ability to transmit information limiting the range of information to be indicated by a long-term signal as information about a downlink radio resource.

In other words, in a fifth aspect of the present invention, there is provided a radio base station used in a mobile communication system in which a mobile station receives downlink data transmitted from a radio base station by utilizing a downlink radio resource assigned to the mobile station through predetermined scheduling information in a given cycle, including the first transmitting module, configured to transmit to the mobile station a given cycle and radio resource information zi downlink, a second transmitting module configured to transmit the specified scheduling information to the mobile station, and a communication module configured to transmit downlink data in a given cycle by using the downlink radio resource assigned by the specified scheduling information, the first transmitting the module is configured to transmit information to the mobile station that limits the range of information indicated by the specified plan information tion, as the information about the radio resource of the downlink.

In a fifth aspect, a predetermined downlink cycle and radio resource information may be transmitted via an RRC message, and a long-term signal may be transmitted via a downlink control channel.

In other words, in the fifth aspect, the first transmitting module may be configured to transmit a predetermined cycle and downlink radio resource information to the mobile station via an RRC message, and the second transmitting module may be configured to transmit predetermined scheduling information to the mobile station by downlink control channel.

In a fifth aspect, a long-term assignment signal, in other words, predetermined scheduling information, may include at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, redundancy information transmission format, transmission power control information, HARQ request information, new data indicator.

In a fifth aspect, the first transmitting module may be configured to determine a specified range based on the data type.

As indicated above, the present invention is configured to reduce the likelihood of false alarms in downlink scheduling information in long-term scheduling. As a result, the present invention provides a stable and efficient mobile communication method, a mobile station, and a radio base station.

Brief Description of the Drawings

Figure 1 is a functional diagram of a mobile station in accordance with a first embodiment of the present invention.

FIG. 2 is a diagram showing downlink scheduling information in a mobile communication system in accordance with a first embodiment of the present invention.

FIG. 3 is a diagram for explaining scheduling performed in a mobile communication system in accordance with a first embodiment of the present invention.

4 is a functional diagram of a radio base station in accordance with a first embodiment of the present invention.

5 is a flowchart of operations of a mobile station in accordance with a first embodiment of the present invention.

The implementation of the invention

Configuration of a mobile communication system in accordance with a first embodiment of the present invention

Next, with reference to FIG. 1, a configuration of a mobile communication system according to a first embodiment of the present invention is described. This embodiment is described using, as an example, a mobile communication system using an LTE scheme, but the present invention can also be applied to other types of mobile communication systems.

In the mobile communication system in accordance with the present embodiment, the mobile station UE is configured to receive downlink data transmitted from the radio base station eNB in a predetermined cycle by using a long-term assigned PDSCH (downlink radio resource), and reception starts at the designated starting moment of time.

As shown in FIG. 1, the mobile station UE includes a long-term information receiving unit 61, a long-term signal receiving unit 62, and a downlink data receiving unit 63.

The long-term information receiving unit 61 is configured to receive long-term information from the radio base station eNB, including a predetermined cycle and downlink radio resource information.

In addition, the long-term information receiving unit is configured to transmit downlink radio resource information to the long-term signal receiving unit 62.

More specifically, the long-term information receiving unit 61 is configured to obtain long-term information based on the RRC message transmitted from the radio base station eNB.

In this case, the downlink radio resource information is, for example, information for limiting the range of information to be transmitted by a long-term signal (i.e., predetermined scheduling information) described below, that is, a PDCCH (downlink scheduling information) prescribing long-term assignment of PDSCH (Downlink Radio Resource) for long-term planning.

The following is a detailed description.

The elements of the PDCCH information (downlink scheduling information) prescribing the long-term assignment are, for example, the information elements shown in FIG.

The format indicator is information indicating whether the PDCCH is information for the uplink or information for the downlink. The downlink information is also called simplified downlink control information.

The resource block assignment information is information indicative of the resource block assignment information for the downlink signal indicated by the PDCCH.

Modulation and coding scheme (MCS) information is modulation and coding scheme information for a downlink signal indicated by a PDCCH. Moreover, the information on the modulation and coding scheme is, for example, information such as the amount of data, the modulation scheme, and the redundancy version parameter in the HARQ request.

HARQ process information is HARQ process information for a downstream signal indicated by a PDCCH.

The new data indicator is information indicating whether the downlink signal indicated by the PDCCH is intended for new transmission or retransmission.

Transmission power control information (TPC) is information for controlling transmission power for an uplink control signal indicated by a PDCCH.

The RNTI / CRC identifier is CRC bits encoded by a Mobile Station Identifier (UE-ID (RNTI)).

It should be noted that the above PDCCH information elements (downlink scheduling information) are examples, and an information element other than the above information elements may be included in the PDCCH, or some of the above information elements may be excluded from the PDCCH .

In addition, the downlink radio resource information may be information to limit the range of information to be transmitted through the above PDCCH (downlink scheduling information), as described below.

For example, downlink radio resource information may be information to limit the range of information to be transmitted by the above resource block assignment information.

More specifically, the downlink radio resource information may be information to limit the number or positions of resource blocks to be transmitted by the above resource block assignment information.

In addition, the downlink radio resource information may be information for limiting the number of resource blocks to be transmitted by the above resource block assignment information to a value of 2 or 3.

In this case, when the number of resource blocks transmitted by the PDCCH (downlink scheduling information) is neither 2 nor 3, information on the downlink radio resource and information (resource block assignment information) transmitted by the PDCCH ( downlink planning information), contradict each other.

In addition, the downlink radio resource information may be information for limiting the number of resource blocks to be transmitted by the above resource block assignment information to a value of 3 or less.

More specifically, the downlink radio resource information may be information intended to indicate a maximum number of resource blocks to be transmitted by the above resource block assignment information.

In this case, when the number of resource blocks transmitted by the PDCCH (downlink scheduling information) is more than 3, downlink radio resource information and information (resource block assignment information) transmitted by the PDCCH (downlink scheduling information ), contradict each other.

It should be noted that the downlink radio resource information indicates the maximum number of resource blocks transmitted by the above resource block assignment information in the above example, but instead, the downlink radio resource information may indicate a minimum number of resource blocks.

In another embodiment, the downlink radio resource information may indicate both a maximum and a minimum number of resource blocks to be transmitted by the above resource block assignment information.

For example, the downlink radio resource information may indicate a value of 10 as the maximum number of resource blocks to be transmitted by the above resource block assignment information, and may indicate a value of 5 as the minimum number of resource blocks.

In this case, when the number of resource blocks transmitted by the PDCCH (downlink scheduling information) is more than 10, or the number of resource blocks is less than 5, downlink radio resource information and information (resource block assignment information) transmitted through the channel PDCCH (information scheduling downlink), contradict each other.

Furthermore, provided that the downlink radio resource information limits the range of information to be transmitted by the above resource block assignment information, the range limiting method is not limited to the above limitation of the number of resource blocks, and the information may limit the range of information to be transmitted by the the above resource block assignment information, by another restriction method.

For example, downlink radio resource information may be information to limit the position of the resource block to be transmitted by the above resource block assignment information in the frequency axis direction.

In another embodiment, the downlink radio resource information may be information to limit information to be transmitted, for example, by the above modulation and coding scheme information. The downlink radio resource information may be information to limit, for example, the range of the modulation scheme, the amount of data, and the like.

More specifically, the downlink radio resource information may be information to limit the modulation scheme to be transmitted by the above modulation and coding scheme information.

For example, the downlink radio resource information may be information to limit the modulation scheme to be transmitted by the above modulation and coding scheme information by the QPSK.

In this case, when the modulation scheme transmitted by the PDCCH (downlink scheduling information) is different from the QPSK, for example, when the modulation scheme is a 16QAM modulation scheme, downlink radio resource information and information (modulation scheme information and encoding) transmitted via the PDCCH (downlink scheduling information) contradict each other.

It should be noted that the above example illustrates a case in which the downlink radio resource information limits the modulation scheme to be transmitted by the modulation and coding scheme information to the QPSK scheme. However, instead, the downlink radio resource information may limit the modulation scheme to be transmitted by the modulation and coding scheme information, the 16QAM scheme, the 64QAM scheme, and both the QPSK scheme and the 16QAM scheme.

More specifically, the downlink radio resource information may indicate whether each of the QPSK, 16QAM and 64QAM modulation schemes is to be transmitted by modulation and coding scheme information.

In another embodiment, the downlink radio resource information may be information to limit, for example, the amount of data to be transmitted by the above modulation and coding scheme information.

For example, downlink radio resource information may be information to limit the amount of data to be transmitted by modulation and coding scheme information to 320 bits.

In this case, when the amount of data transmitted through the PDCCH (downlink scheduling information) is different from 320 bits, for example when the data amount is 512 bits, downlink radio resource information and information (modulation and coding scheme information) transmitted through the channel PDCCH (information scheduling downlink), contradict each other -

It should be noted that the above value of 320 bits is only an example, and a different number of bits other than 320 may be indicated.

In addition, in the above example, one type of data volume is provided, however, two or more types of data volume may be provided.

More specifically, the downlink radio resource information may be information to limit the amount of data to be transmitted by modulation and coding scheme information, for example, 320 bits and 640 bits.

In another embodiment, the downlink radio resource information may be information to limit the amount of data to be transmitted by modulation and coding scheme information, for example, 320 bits or fewer bits.

In this case, when the amount of data transmitted through the PDCCH (downlink scheduling information) is more than 320 bits, for example, when the data amount is 512 bits, downlink radio resource information and information (modulation and coding scheme information) transmitted through the channel PDCCH (scheduling information downlink), contradict each other.

It should be noted that the above value of 320 bits is just an example, and a different number of bits other than 320 may be indicated. In addition, in the above example, a maximum amount of data volume is provided, but instead, a minimum amount of volume can be provided data.

In another embodiment, both a maximum value and a minimum data volume value may be provided. For example, a value of 640 bits may be indicated as a maximum value of a data volume, and a value of 320 bits may be indicated as a minimum value of a data volume.

In this case, when the amount of data transmitted via the PDCCH (downlink scheduling information) is more than 640 bits or when the data amount is less than 320 bits, downlink radio resource information and information (modulation and coding scheme information) transmitted through the channel PDCCH (scheduling information downlink), contradict each other.

It should be noted that in the above example, the case is shown where the downlink radio resource information limits the information transmitted by the resource block assignment information or the information transmitted by the modulation and coding scheme information, but instead the resource information in the same way a downlink radio may limit an information item other than the above items.

For example, downlink radiocommunication resource information may limit information transmitted by HARQ process information.

For example, when 8 HARQ processes are defined and each HARQ process is numbered # 1 to # 8, the downlink radio resource information limits the HARQ process numbers transmitted by the HARQ process information to numbers # 1 and # 2.

More specifically, a maximum value or a minimum value of HARQ process numbers transmitted by HARQ process information can be transmitted. Alternatively, information may be transmitted on whether each of the HARQ process numbers is transmitted.

In addition, the resource block assignment information or modulation and coding scheme information described above is information related to the resource blocks or information related to the modulation scheme or data volume, so that the resource block assignment information or modulation and coding scheme information may be referred to as transmission format information.

The long-term signal receiving unit 62 is configured to receive a long-term signal from the radio base station eNB.

More specifically, the long-term signal receiving unit 62 is configured to receive a PDCCH (downlink scheduling information) from a radio base station eNB as a long-term signal, wherein the PDCCH (long-term information) is transmitted to this mobile station and prescribes a long-term assignment PDSCH (Downlink Radio Resource) for long-term planning.

For example, the long-term signal receiving unit 62 may be configured to determine, based on the RNTI or the like specified in the PDCCH, whether the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH is transmitted to the mobile station (downlink radiocommunication resource) for long-term planning.

Instead, the long-term signal receiving unit 62 may also be configured to determine, based on the RNTI or the like specified in the PDCCH, whether the received PDCCH is a PDCCH dynamically assigning a PDSCH (Downlink Radio Resource), that is, downlink scheduling information for dynamic scheduling.

In this case, we consider the case when, as a long-term planning method in the LTE scheme, it is determined based on a specific bit in the PDCCH whether the PDCCH is a PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, or a PDCCH dynamically assigning a PDSCH (Downlink Radio Resource), that is, downlink scheduling information for dynamic scheduling. In this case, the long-term signal receiving unit 62 may be configured to determine, based on one bit, whether the PDCCH is a PDCCH (downlink scheduling information) prescribing the long-term assignment of a PDSCH (downlink radio resource) for long-term scheduling or by a PDCCH dynamically assigning a PDSCH (Downlink Radio Resource), that is, downlink scheduling information for dynamic scheduling.

Consider another case where, as a long-term planning method in the LTE scheme, some of the information elements in the PDCCH indicate whether the PDCCH is a PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, or a PDCCH dynamically assigning a PDSCH (Downlink Radio Resource), that is, downlink scheduling information for dynamic scheduling. In this case, the long-term signal receiving unit 62 may be configured to determine, based on a portion of the information elements in the PDCCH, whether the PDCCH is a PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (radio resource downlink) ) for long-term scheduling, or by a PDCCH dynamically assigning a PDSCH (Downlink Radio Resource), i.e., downlink scheduling information for anyone planning.

In addition, the long-term signal receiving unit 62 is configured to receive downlink radio resource information from the long-term information receiving unit 61.

Meanwhile, the downlink radio resource information, as described above, is information for limiting the range of information to be transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) communication lines) for long-term planning.

In addition, the long-term signal receiving unit 62 determines whether the downlink radio resource information and the information to be transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH, do not contradict each other. (downlink radiocommunication resource) for long-term planning.

When the long-term signal receiving unit 62 has determined that the downlink radio resource information and the information to be transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) ) for long-term planning, contradict each other, the long-term signal receiving unit 62 discards the long-term signal, that is, the PDCCH ( downlink scheduling information), prescribing the long-term assignment of the PDSCH (Downlink Radio Resource) for long-term scheduling, which the long-term signal receiving unit 62 has determined to be a signal transmitted to this mobile station.

More specifically, in this case, the long-term signal receiving unit 62 considers that the information transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling , was not transmitted to this mobile station.

In the above processing, the long-term signal receiving unit 62 supplies the downlink receiving module 63 with a long-term signal that is not discarded, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term planning.

The following is an example of the processing described above for discarding a long-term signal, that is, a PDCCH (downlink scheduling information) prescribing a long-term assignment of a PDSCH (downlink radio resource) for long-term scheduling.

Consider the case where the downlink radiocommunication resource information is information intended to limit the number of resource blocks to be transmitted by the resource block assignment information to, for example, a value of 2 or 3. In the case where the number of resource blocks transmitted via the channel PDCCH (downlink scheduling information), is neither 2 nor 3, the long-term signal receiving unit 62 determines that the downlink radio resource information ligature and information (resource block assignment information) transmitted through a PDCCH channel (information downlink scheduling) contradict each other. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider another case where the downlink radio resource information is information intended to limit the number of resource blocks to be transmitted by the resource block assignment information, for example, to a value of 3 or less. In the case where the number of resource blocks transmitted by the PDCCH (downlink scheduling information) is greater than 3, for example, when the number of resource blocks is 5, the long-term signal receiving unit 62 determines that the downlink radio resource information and information (resource block assignment information) transmitted by the PDCCH (downlink scheduling information) are conflicting. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider another case where the downlink radio resource information is information intended to limit the number of resource blocks to be transmitted by the resource block assignment information, for example, to a value of 10 or less, but not less than 5. In the case of when the number of resource blocks transmitted by the PDCCH (downlink scheduling information) is greater than 10 or less than 5, for example, when the number of resource blocks is 12, module 62 Receiving term signal assignment determines that radio resource information and downlink information (resource unit assignment information) transmitted through a PDCCH channel (information downlink scheduling) contradict each other. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider an alternative case where the downlink radio resource information is information intended to limit a modulation scheme transmitted by modulation and coding scheme information, for example, a QPSK scheme. In the case where the modulation scheme transmitted by the PDCCH (downlink scheduling information) is not a QPSK, for example, when the modulation scheme is a 16QAM, the long-term signal receiving unit 62 determines that the downlink radio resource information and information (modulation and coding scheme information) transmitted by the PDCCH (downlink scheduling information) contradict each other. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider an alternative case where the downlink radio resource information is information intended to limit the amount of data transmitted by modulation and coding scheme information, for example, to 320 bits. In the case where the amount of data transmitted through the PDCCH (downlink scheduling information) is not 320 bits, for example when the data amount is 1024 bits, the long-term signal receiving unit 62 determines that the downlink radio resource information and information (modulation and coding scheme information) transmitted by the PDCCH (downlink scheduling information) are conflicting. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider an alternative case where the downlink radio resource information is information intended to limit the amount of data transmitted by modulation and coding scheme information, for example, to 320 bits or fewer bits. In the case where the amount of data transmitted via the PDCCH (downlink scheduling information) is more than 320 bits, for example, when the data amount is 512 bits, the long-term signal receiving unit 62 determines that the downlink radio resource information and information (modulation and coding scheme information) transmitted by the PDCCH (downlink scheduling information) are conflicting. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider an alternative case where the downlink radio resource information is information intended to limit the amount of data to be transmitted by a modulation and coding scheme, for example, 640 bits or fewer bits, but not less than 320 bits. In the case where the amount of data transmitted through the PDCCH (downlink scheduling information) is more than 640 bits or less than 320, for example, when the amount of data is 1024 bits, the long-term signal receiving unit 62 determines that the radio resource information is downstream communication lines and information (modulation and coding scheme information) transmitted by the PDCCH (downlink scheduling information) are conflicting. Thus, the PDCCH (downlink scheduling information) is discarded.

Consider an alternative case where the downlink radio resource information is information intended to limit the HARQ process number to be transmitted by the HARQ process information, for example, by numbers # 1 and # 2. In this case, when the HARQ process number transmitted by the PDCCH (downlink scheduling information) is neither # 1 nor # 2, for example, when the HARQ process number is # 3, the long-term signal receiving unit 62 determines that the resource downlink radio communications and information (HARQ process information) transmitted by the PDCCH (downlink scheduling information) are conflicting. Thus, the PDCCH (downlink scheduling information) is discarded.

It should be noted that in the above example, the long-term signal receiving unit 62 determines whether the downlink radio resource information and the information to be transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information), are compatible with each other, prescribing the long-term assignment of a PDSCH (Downlink Radio Resource) for long-term planning. Instead, the long-term signal receiving unit 62 may determine if there is any contradiction other than the above contradictions. Then, when it is determined that such a contradiction exists, the long-term signal receiving unit 62 may discard the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling.

For example, consider the case where the maximum amount of received data supported by the mobile station is 10,000 bits. When, by means of a long-term signal, i.e., a PDCCH (downlink scheduling information) prescribing the long-term assignment of a PDSCH (downlink radio resource) for long-term scheduling, a long-term signal receiving unit 62 is ordered to receive a 20,000-bit downlink signal, the long-term signal receiving unit 62 may discard this long-term signal prescribing the long-term assignment of the PDSCH (Radio Resource) outgoing link) for long-term planning.

Moreover, in general, in the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, there is a bit circuit that does not matter as information.

Accordingly, when some bitmap of the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, does not matter as information, the long-term signal receiving unit 62 the destination may discard the long-term destination signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term destination of the PDSCH (resource a radio downlink) for long-term planning.

It should be noted that the expression "bit scheme does not matter as information" can be formulated in such a way that the bit scheme cannot be transmitted.

In this case, the long-term signal receiving unit 62, regardless of the downlink radio resource information, can determine whether some bitmap of the long-term signal, that is, the PDCCH (downlink scheduling information), prescribes the long-term assignment of the PDSCH (radio resource) downlink) for long-term planning, the above value as information.

Alternatively, when the downlink radio resource information does not exist, the long-term signal receiving unit 62 may determine whether some bitmap of the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radiocommunication resource) for long-term planning, the above value as information.

The following describes an example of the above non-transmittable bitmap.

For example, when the value of the number of resource blocks indicated by the resource information of the resource block shown in FIG. 2 is constantly determined in the long-term signal equal to 10 or less, a bit circuit indicating a value greater than 10 as the number of resource blocks indicated by the resource block assignment information is considered a bitmap not to be transmitted.

More specifically, the mobile station UE discards the long-term assignment signal when the number of resource block numbers indicated by the resource-block assignment information in the long-term scheduling signal is greater than 10.

Alternatively, when the amount of data volume indicated by the modulation and coding scheme information shown in FIG. 2 is constantly determined in the long-term assignment signal to be, for example, 1000 or less, a bit circuit indicating a value greater than 1000, as the amount of data indicated by the modulation and coding scheme information, is considered a bit scheme not to be transmitted.

More specifically, the mobile station UE discards the long-term assignment signal when the amount of data indicated by the resource block assignment information in the long-term scheduling signal is greater than 1000.

It should be noted that the case where the value of the data volume indicated by the modulation and coding scheme information is greater than 1000 may mean that a part of the bits of the modulation and coding scheme information, for example, is not a predetermined value. In the case when the data volume is determined by a four-digit binary number (hereinafter - “abcd”, where the first digit “a” corresponds to the most significant bit), the data volume is expressed as a decimal number as follows.

(amount of data expressed in decimal) = 2 ³ × a + 2 ² × b + 2 ¹ × s + 2 ⁰ × d.

Moreover, when the digit “a”, which is the most significant bit, is not equal to zero, that is, when “a” is 1, the amount of data is at least 8.

In particular, the mobile station UE may discard the long-term signal when a portion of the modulation and coding scheme information bits in the long-term signal is not a predetermined value.

More specifically, the mobile station UE may discard the long-term signal when the most significant bit of modulation and coding information in the long-term signal is not a predetermined value (for example, when in the above example the most significant bit is not 0) or a predetermined number of bits, following the most significant bit are not a given value (for example, when in the above example neither “a” nor “b” are equal to 0, it is considered that the values of two consecutive bits are not a given value).

It should be noted that the same processing can be applied when information about the modulation and coding scheme indicates both the amount of data and the modulation scheme.

Alternatively, when the modulation scheme indicated by the modulation and coding scheme information shown in FIG. 2 is constantly determined in the long-term signal to be, for example, a QPSK scheme, a bit scheme indicating a 16QAM or 64QAM scheme as a modulation scheme, indicated by the information about the modulation and coding scheme is considered a bit scheme that cannot be transmitted.

More specifically, the mobile station UE discards the long-term signal when the modulation scheme indicated by the modulation and coding scheme information in the long-term signal is not a QPSK.

In another embodiment, the long-term signal as a whole is a signal requiring a new transmission. Therefore, a bit scheme indicating, for example, a modulation scheme used in retransmission in modulation and coding scheme information is considered a bit scheme not to be transmitted.

More specifically, the mobile station UE discards the long-term signal when the modulation and coding scheme information in the long-term signal indicates a bit scheme defining a modulation scheme used in retransmission.

In another embodiment, when it is determined that, as a transmission power control information value shown in FIG. 2, in a long-term assignment signal, for example, a value equal to 1, a value equal to 0, is determined to be a bit power as a transmission power control information non-transferable circuit.

More specifically, the mobile station UE discards the long-term signal when the amount of transmit power control information in the long-term signal is 0.

It should be noted that in the above example, the number of bits for the transmission power control information is 1, but the number of bits may differ from 1, for example, may be 2 or 3. For example, when the number of bits for the transmission power control information is 2, and it is determined that as the value of the transmission power control information, a value of 11 is constantly set, bit patterns 10, 01, 00 are considered bit patterns not to be transmitted.

In another embodiment, when it is determined that, as the value of the HARQ process information shown in FIG. 2, for example, the value 111 is permanently set in the long-term assignment signal, a bit scheme other than 111 is considered a bit scheme as the HARQ process information non-transferable.

More specifically, the mobile station UE discards the long-term signal when the amount of HARQ process information in the long-term signal is 111.

It should be noted that in the above example, the number of bits for the HARQ process information is 3, but the number of bits may be a value other than 3, for example, a value of 2 or 4.

In another embodiment, when it is determined that as the value of the redundancy version included in the modulation and coding scheme information shown in FIG. 2, in the long-term assignment signal, for example, a value of 11, a bit scheme other than 11, is continuously set as HARQ process information is considered a non-transmittable bitmap.

More specifically, the mobile station UE discards the long-term signal when the magnitude of the redundancy version in the long-term signal is not 11.

It should be noted that in the above example, the number of bits for the redundancy version is 2, but the number of bits may be a value other than 2, for example, a value of 1 or 3.

In another embodiment, when it is determined that, as the value of the new data indicator shown in FIG. 2, in the long-term assignment signal, for example, a value of 1 is constantly set, the value 0 as the indicator of new data is considered to be a bitmap that cannot be transmitted.

More specifically, the mobile station UE discards the long-term assignment signal when the value of the new data indicator in the long-term assignment signal is 0.

In another embodiment, the mobile station UE may identify the above non-transmittable bitmap based on information in a long-term signal received previously.

For example, when the amount of data indicated by the modulation and coding scheme information in the long-term signal received earlier is constantly 320 bits, the mobile station UE may consider the bit scheme indicating the data amount other than 320 bits as a bit scheme to be transferred.

In this case, for example, it is believed that a false alarm occurs when the mobile station UE is in a mode where previously it has not received even one correct long-term signal. Consider the case where the mobile station UE has received a long-term signal previously having at least three times the same amount of data. In this case, the mobile station UE may consider a bit scheme indicating a data amount different from the above data volume as a bit scheme not to be transmitted.

Alternatively, when the mobile station UE has sequentially received a long-term scheduling signal previously having at least three times the same volume, the mobile station UE may consider the bit scheme indicating a data amount different from the above data volume as a bit scheme, non-transferable.

It should be noted that the values given in the above example, such as 320 bits and “three times”, are only examples and may differ from those given in the above example.

It should be noted that many of the above processing operations for discarding the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling can be applied simultaneously.

More specifically, when a plurality of processing operations are performed to discard a PDCCH prescribing a long-term channel assignment, and when at least one of the processing operations determines whether to discard a PDCCH, a PDCCH can be discarded.

The downlink data receiving unit 63 is configured to receive downstream data to be transmitted by the PDSCH (Downlink Radio Resource) assigned by the PDCCH.

More specifically, the downlink data receiving unit 63 is configured to determine a subframe in which the PDCCH (downlink scheduling information) is transmitted as a designated starting point in the reception of the long-term signal indicated above the long-term signal from the receiving unit 62, then there is a PDCCH prescribing the long-term assignment of a PDSCH (Downlink Radio Resource) for long-term scheduling. The downlink data receiving unit 63 is configured to start after this long-term downlink data reception via the PDSCH (Downlink Radio Resource) for long-term scheduling in the above predetermined cycle at the designated start time.

In the example shown in FIG. 3, the downlink data receiving unit 63 is adapted to receive when the long-term signal receiving unit 62 received the long-term signal in subframe # 3 via the PDCCH, downlink data via the PDSCH (downlink radio resource) mapped to a resource block (a set of subcarriers) in a subframe # 3 in which a PDCCH is transmitted.

In addition, the downlink data receiving unit 63 is configured to receive downstream data via a PDSCH (downlink radio resource) mapped to a resource block (a plurality of subcarriers) indicated by a PDCCH in a 20 ms loop starting from subframe # 3.

That is, the downlink data receiving unit 63 is configured to receive downstream data via a PDSCH (downlink radio resource) mapped to a resource block (a plurality of subcarriers) indicated by the PDCCH in subframes # 3, # 23, # 43, ....

On the other hand, an eNB radio base station in accordance with the present invention is configured to transmit a predetermined cycle and downlink radio resource information to a mobile station UE.

Since the description of such information as the downlink radio resource information coincides with the description given with reference to the mobile station UE, a description of the indicated information is omitted.

As shown in FIG. 4, the eNB radio base station includes a long-term information transmitting unit 71, a long-term signal transmitting unit 72, and a downlink data transmitting unit 73.

The long-term information transmission unit 71 is configured to transmit long-term information (long-term communication information) to the mobile station UE, including a predetermined cycle and downlink radio resource information.

More specifically, the long-term information transmission unit 71 is configured to transmit long-term information to the mobile station UE by using the RRC message.

Moreover, the downlink radio resource information is information for limiting the range of information to be transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for the long-term planning.

Since the description of such information as the downlink radio resource information coincides with the description given with reference to the mobile station UE, a description of the indicated information is omitted.

Meanwhile, the long-term information transmitting unit 71 may set the uplink radio resource information based on the data type.

For example, when the data type is voice packet data (VoIP), the long-term information transmitting unit 71 may set downlink radio resource information so that it is information intended to limit the number of resource blocks to be transmitted by resource block assignment information a value of 3 or less. For example, when the data type is streaming data, the long-term information transmission unit 71 may set the downlink radio resource information so that it is information intended to limit the number of resource blocks to be transmitted by the resource block assignment information to 10 , or less.

In another embodiment, when the data type is Voice Packet Data (VoIP), the long-term information transmission unit 71 may set the downlink radio resource information so that it is information intended to limit the modulation scheme to be transmitted by the scheme information modulation and coding, QPSK circuit. In addition, when the data type is streaming data, the long-term information transmitting unit 71 may set the downlink radio resource information so that it is information intended to limit the modulation scheme to be transmitted by the modulation and coding scheme information to the QPSK or 16QAM circuitry.

In another embodiment, when the data type is voice packet data (VoIP), the long-term information transmitting unit 71 may set the downlink radio resource information so that it is information intended to limit the amount of data to be transmitted by the circuit information modulation and coding, 320 bits. In addition, when the data type is streaming data, the long-term information transmitting unit 71 may set the downlink radio resource information so that it is information intended to limit the amount of data to be transmitted by the modulation and coding scheme information to 640 bits .

More specifically, the order of limiting the information to be transmitted by the long-term assignment signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, can be determined based on the data type, for which, through long-term planning, a resource is assigned.

It should be noted that the above data type may be referred to as the type of service. More specifically, the type of service is information indicating the type of packet service. Thus, the type of service may include, for example, a voice packet communication (VoIP) service, a voice service, a streaming service, a FTP service (File Transfer Protocol, file transfer protocol), and the like.

In the above example, the long-term information transmitting unit 71 sets downlink radio resource information based on the data type, but can instead set the downlink radio resource information based on the type of contract, type of logical channel, type of cell or type of priority.

In addition, the type of contract indicates the type of contract concluded by the user of the mobile station UE, and includes, for example, a low-class contract and a high-class contract, or a fixed-rate contract, or a prepaid contract, etc.

In addition, the type of cell indicates the operating conditions of the cell and may include indoor or outdoor conditions, an urban area or a suburban area.

A logical channel type is a type of logical channel such as an address control channel (DCCH, Dedicated Control Channel) or an address traffic channel (DTCH, Dedicated Traffic Channel). In the DCCH or DTCH, a plurality of channels may further be defined.

In this case, the radio access channel (Radio Bearer) means a radio access channel that transmits data, and between it and the logical channel through which data is transmitted, an unambiguous relationship is defined. As a result, the access channel means approximately the same as the logical channel.

The priority type is used to classify the priorities of the transmission of upstream and downstream data to classes. For example, data having first-class priority is given priority over transmission over data having second-class priority.

The priority type may be combined with a logical channel, and in this case may be called the priority of the logical channel. In another embodiment, the priority type may be defined as a priority class.

The long-term signal transmission unit 72 is configured to transmit a long-term signal to the mobile station UE.

More specifically, the long-term signal transmitting unit 72 is configured to transmit to the mobile station UE a PDCCH (downlink scheduling information) prescribing the long-term assignment of a PDSCH (downlink radio resource) for long-term scheduling as a long-term signal.

It should be noted that when it is determined, as described above, that as the value of the transmission power control information (see FIG. 2), the value 1 is constantly set in the long-term signal, the long-term signal transmission unit 72 can constantly set the value 1 as the value transmission power control information.

In another embodiment, when it is determined, as described above, that as the value of the HARQ process information (see FIG. 2), the value 111 is constantly set in the long-term signal, the long-term signal transmission unit 72 can constantly set the value 111 as the information value about the HARQ process.

In another embodiment, when it is determined, as described above, that the value of the redundancy version (see FIG. 2) is permanently set to 11 in the long-term assignment signal, the long-term signal transmission unit 72 can constantly set the value 11 as the redundancy version value.

In another embodiment, when it is determined, as described above, that as the value of the new data indicator (see FIG. 2), the value 1 is constantly set in the long-term signal, the long-term signal transmission module 72 can constantly set the value 1 as the value of the new indicator data.

The downlink data transmission unit 73 is configured to transmit downstream data to be transmitted by the PDSCH (Downlink Radio Resource) assigned by the PDCCH.

More specifically, the downlink data transmission unit 73 is configured to determine a subframe in which the PDCCH is transmitted so that it matches the designated start time when the above long-term signal is transmitted by the long-term signal transmission unit 72. The downlink data transmission unit 73 is configured to start after that a long-term downlink data transmission via the PDSCH (Downlink Radio Resource) for long-term scheduling in the above predetermined cycle, the transmission starting at the designated start time.

Operation of a mobile communication system in accordance with a first embodiment of the present invention

Next, with reference to FIG. 5, a description will be made of the operation of a mobile communication system in accordance with a first embodiment of the present invention.

As shown in FIG. 5 in step S201, the mobile station UE by means of an RRC message or the like. receives, from the radio base station eNB, long-term information including said predetermined cycle and downlink radio resource information.

It should be noted that the downlink radio resource information is, for example, information for limiting the range of information to be transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) communication lines) for long-term planning.

The description of the downlink radio resource information coincides with this description with reference to the mobile station UE. Therefore, a description of this information is omitted.

In step S202, the mobile station UE receives a long-term signal transmitted by the radio base station eNB via the PDCCH.

More specifically, the mobile station UE receives, from a radio base station eNB, a PDCCH (downlink scheduling information) prescribing long-term assignment of a PDSCH (downlink radio resource) for long-term scheduling as a long-term signal.

In step S203, the mobile station UE determines whether the downlink radio resource information and the information transmitted by the long-term assignment signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource), are consistent with each other communication lines) for long-term planning.

In this document, a detailed description of the above processing to determine whether there is a contradiction is omitted, since this description coincides with the description of this processing given with reference to the mobile station UE.

In the case where the mobile station UE determines that the downlink radio resource information and the information transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term planning, contradict each other (“Yes” in step S203), proceed to step S204.

In step S204, the mobile station UE discards the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling.

More specifically, the mobile station UE considers the information transmitted by the long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource) for long-term scheduling, to information that was not transmitted to this mobile station UE.

In step S205, the mobile station UE determines the subframe as the designated start time above, and the specified long-term signal, that is, the PDCCH (downlink scheduling information) prescribing the long-term assignment of the PDSCH (downlink radio resource), is transmitted in the subframe. ) for long-term planning. Then, the mobile station UE starts receiving a long-term downlink signal via a PDSCH (Downlink Radio Resource) for long-term assignment in a predetermined cycle above, and reception starts at a designated start time in step S105.

More specifically, in this case, the mobile station UE receives downlink data via the PDSCH (downlink radio resource) for long-term scheduling until the above PDSCH (downlink radio resource) for long-term scheduling is canceled.

The technical result and advantages of a mobile communication system in accordance with the first embodiment of the present invention

As described above, the probability of a false alarm for one PDCCH (uplink scheduling grant or downlink scheduling grant information) is 1/2 ¹⁶ .

In general, the mobile station UE is trying to decode 40 PDCCHs in one subframe, with a calculated total probability of false alarms of 40 × 1/2 ¹⁶ = 0,0006.

In this case, the false alarm described above is a phenomenon in which the mobile station UE randomly determines that the PDCCH is transmitted to the mobile station, despite the fact that the PDCCH is not transmitted to the mobile station UE. Thus, the information decoded in this case with a high degree of probability will be incorrect.

Accordingly, as described above, the range of information in the PDCCH is limited, and when the mobile station UE receives the channel PDCCH, the information of which is outside the limited range, the mobile station UE performs processing to discard the PDCCH. Due to this, the probability of false alarms can be significantly reduced.

For example, suppose that the number of bits in the PDCCH other than the cyclic checksum check bits is 24, and the 12-bit range is limited in these 24 bits in the PDCCH. To simplify the calculation, suppose that the bit circuit of these 12 bits is limited to one circuit. In this case, as described above, the range of information in the PDCCH is limited, and when the mobile station UE receives a channel PDCCH whose information is outside the limited range, the mobile station UE performs processing to discard the PDCCH. Thus, the probability of a false alarm is calculated as follows:

40 × 1/2 ¹⁶ × 1/2 ^{12/2 24} = 1,5 × 10 ^-7.

Thus, in this case, the probability of a false alarm is much less.

More specifically, the mobile communication system in accordance with the first embodiment of the present invention is configured to reduce the likelihood of false alarm PDCCH (downlink scheduling information) indicating a resource assignment for long-term scheduling. As a result, the mobile communication system in accordance with the first embodiment of the present invention provides a stable and efficient mobile communication method, a mobile station and a radio base station.

Modifications

It should be noted that the functions of the mobile station UE and the radio base station eNB described above can be implemented using a hardware module, a software module executed by a computing device, or a combination thereof.

The program module can be equipped with any type of information storage means, for example, RAM (random access memory, RAM, Random Access Memory), flash memory, ROM (read-only memory, ROM, Read Only Memory), EEPROM, Electronically Erasable and Programmable ROM, electrically erasable programmable read-only memory device), register, hard disk drive, removable disk or CD-ROM.

The storage means is connected to the computing device so that the computing device can read information from the storage means and write information to the storage means. The storage medium may also be integrated in a computing device. The storage medium and computing device may also be implemented in a specialized integrated circuit (ASIC). Specialized integrated circuit can be performed in a mobile station UE and a radio base station eNB. The storage means and the computing device can also be implemented in the mobile station UE and in the radio base station eNB as separate elements.

The present invention has been described in detail using the aforementioned embodiment, however, it will be apparent to those skilled in the art that the present invention is not limited to the described embodiment. Modifications and changes of the present invention can be made without deviating from the essence and scope of the present invention defined in the scope of the claims. Thus, the above description is provided for the purpose of illustration and is not intended to limit in any way the present invention.

Claims (17)

1. A mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station through predetermined scheduling information in a predetermined cycle, including:
step (A), at which a predetermined cycle and downlink radio resource information is transmitted to the mobile station;
step (B), at which the predetermined scheduling information is transmitted to the mobile station; and
step (C), in which downlink data is received in a predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein reception starts at a particular moment determined based on the received predetermined scheduling information, information on the downlink radiocommunication resource represents information that limits the range of information indicated by the specified planning information;
and in step (C), the predetermined scheduling information is discarded if the downlink radio resource information and the information transmitted by the predetermined scheduling information contradict each other. 2. The method according to claim 1, characterized in that in step (A), the predetermined cycle and the downlink radio resource information are transmitted by means of an RRC message; and in step (B), the predetermined scheduling information is transmitted to the mobile station via the downlink control channel. 3. The method according to claim 1, characterized in that in step (C), if the information included in the preset scheduling information is outside the range limited by the downlink radio resource information, then it is determined that the radio resource information the downlink and the information transmitted by the predetermined scheduling information contradict each other. 4. The method according to claim 1, characterized in that the predetermined scheduling information includes at least one type of information from the following: resource block assignment information, modulation scheme, data amount,
modulation and coding scheme information, redundancy version information, transmission format information, transmission power control information, HARQ request information, new data indicator. 5. A mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station through predetermined scheduling information in a predetermined cycle, including:
step (A), at which a predetermined cycle is transmitted to the mobile station;
step (B), at which the predetermined scheduling information is transmitted to the mobile station; and
step (C), in which downlink data is transmitted in a predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein the transmission starts at a particular moment determined based on the received predetermined scheduling information,
wherein step (C) is performed if the information included in the predetermined scheduling information matches the predetermined content. 6. The method according to claim 5, characterized in that the predetermined scheduling information includes at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, information about transmission format, transmission power control information, HARQ request information, new data indicator. 7. A mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to a mobile station by predetermined scheduling information in a predetermined cycle, comprising a receiving module configured to receive from a radio base station a given cycle and downlink radio resource information; and a communication module configured to receive downlink data in a predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein reception starts at a particular moment determined based on the predetermined scheduling information received from the radio base station, information about a downlink radio resource is information limiting a range of information indicated by predetermined scheduling information; and the communication module is configured to discard the predetermined scheduling information if the information on the radio resource of the downlink and the information transmitted by the predetermined scheduling information contradict each other. 8. The mobile station according to claim 7, characterized in that the receiving module is configured to receive a given cycle and downlink radio resource information by means of an RRC message; and the communication module is configured to receive predetermined scheduling information via a downlink control channel. 9. The mobile station according to claim 7, characterized in that the communication module is configured to determine that the information about the radio resource and the information transmitted by the predetermined scheduling information contradict each other if the information included in the preset scheduling information is beyond the limits of the range of information indicated by the predetermined scheduling information, the range being limited by the downlink radio resource information. 10. The mobile station according to claim 7, characterized in that the predetermined scheduling information includes at least one type of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, information transmission format, transmission power control information, HARQ request information, new data indicator. 11. A mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to a mobile station by predetermined scheduling information in a predetermined cycle, comprising a receiving module configured to receive from a radio base station a given cycle; and a communication module configured to receive downlink data in a predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein reception starts at a particular moment determined based on the predetermined scheduling information received from the radio base station, the module the communication is configured to receive downstream data if the information transmitted by the predetermined scheduling information matches the predetermined content m. 12. The mobile station according to claim 11, characterized in that the predetermined scheduling information includes at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, information transmission format, transmission power control information, HARQ request information, new data indicator. 13. A radio base station used in a mobile communication system in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station through predetermined scheduling information, in a predetermined cycle, comprising a first transmitting module configured to transmit a predetermined cycle to the mobile station; a second transmitting module, configured to transmit to the mobile station the predetermined scheduling information; and a communication module configured to transmit downstream data in a predetermined cycle by using a downlink radio resource assigned by predetermined scheduling information, the second transmitting module being configured in all cases to specify predetermined content as information to be transmitted via a predetermined planning information. 14. The base station according to claim 17, wherein the predetermined scheduling information includes at least one kind of information from the following: resource block assignment information, modulation scheme, data amount, modulation and coding scheme information, redundancy version information, information transmission format, transmission power control information, HARQ request information, new data indicator. 15. A mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned
the mobile station through the specified scheduling information, in a given cycle, including:
step (A), at which a predetermined cycle is transmitted to the mobile station;
step (B), at which the predetermined scheduling information is transmitted to the mobile station; and
step (C), in which downlink data is transmitted in a predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein the transmission starts at a particular moment determined based on the received predetermined scheduling information,
moreover, the predetermined scheduling information is discarded if the information included in the predetermined scheduling information does not coincide with at least one of the following information: modulation and coding scheme information, transmission power control information, HARQ process information. 16. A mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station through predetermined scheduling information in a predetermined cycle, including:
step (A), at which a predetermined cycle is transmitted to the mobile station;
step (B), at which the predetermined scheduling information is transmitted to the mobile station; and
step (C), in which downlink data is received in a predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein reception is started at a particular moment determined based on the received predetermined scheduling information, wherein
step (C) is performed if the information included in the predetermined scheduling information matches the predetermined modulation and coding scheme information and the HARQ process information. 17. A mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station by predetermined scheduling information in a predetermined cycle, comprising a receiving module adapted to receive from a radio base station a given cycle; and a communication module configured to receive downlink data in a predetermined cycle by using a downlink radio resource assigned by predetermined scheduling information, wherein the communication module is configured to discard predetermined scheduling information if the information included in the predetermined scheduling information does not match with at least one of the following information: modulation and coding scheme information, transmit power control information, HARQ process information .

Images