WO2009131143A1 - 移動通信方法、移動局及び無線基地局 - Google Patents
移動通信方法、移動局及び無線基地局 Download PDFInfo
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- WO2009131143A1 WO2009131143A1 PCT/JP2009/057981 JP2009057981W WO2009131143A1 WO 2009131143 A1 WO2009131143 A1 WO 2009131143A1 JP 2009057981 W JP2009057981 W JP 2009057981W WO 2009131143 A1 WO2009131143 A1 WO 2009131143A1
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- downlink
- radio resource
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- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000010295 mobile communication Methods 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims description 53
- 238000004891 communication Methods 0.000 claims description 20
- 230000002085 persistent effect Effects 0.000 description 107
- 230000008054 signal transmission Effects 0.000 description 7
- 238000013468 resource allocation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0087—Timing of allocation when data requirements change
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0096—Indication of changes in allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
- H04W72/231—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/008—Timing of allocation once only, on installation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to a mobile communication method, a mobile station, and a mobile station for receiving downlink data transmitted from a radio base station using downlink radio resources that are fixedly assigned at a predetermined period starting from an allocation start time. It relates to a radio base station.
- the specifications are being developed.
- OFDMA Orthogonal Frequency Multiple Access
- SC-FDMA Single-Carrier Frequency Multiple Access
- OFDMA is a system in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is transmitted on each frequency band, and the subcarriers interfere with each other even though they partially overlap on the frequency. By arranging them closely, it is possible to achieve high-speed transmission and increase frequency utilization efficiency.
- SC-FDMA is a transmission method that can reduce interference between terminals by dividing a frequency band and performing transmission using different frequency bands among a plurality of terminals. Since SC-FDMA has a feature that variation in transmission power becomes small, it is possible to realize low power consumption and wide coverage of a terminal.
- the LTE system is a system that performs communication by sharing one or more physical channels between a plurality of mobile stations in both uplink and downlink.
- a channel shared by a plurality of mobile stations is generally referred to as a shared channel.
- a physical uplink shared channel Physical Uplink Shared Channel: PUSCH
- Physical downlink shared channel Physical Downlink Shared Channel: PDSCH
- the shared channel is a “uplink shared channel (UL-SCH)” in the uplink as a transport channel, and a “downlink shared channel (DL-SCH: Downlink) in the downlink. Shared Channel) ”.
- UL-SCH uplink shared channel
- DL-SCH Downlink shared channel
- the mobile station UE to which the shared channel is allocated is selected and selected for each subframe (sub-frame) (1 ms in the LTE scheme). It is necessary to signal the allocated mobile station UE to allocate a shared channel.
- the control channel used for this signaling is “physical downlink control channel (PDCCH: Physical Downlink Control Channel)” or “downlink L1 / L2 control channel (DL L1 / L2 Control Channel: Downlink L1 / L2 Control Channel) ”.
- PDCCH Physical Downlink Control Channel
- DL L1 / L2 Control Channel Downlink L1 / L2 Control Channel
- this processing may be referred to as “Dynamic scheduling”.
- allocating a shared channel may be expressed as “allocating radio resources for the shared channel”.
- the physical downlink control channel information includes, for example, “downlink scheduling information” and “uplink scheduling grant”.
- Downlink Scheduling Information includes, for example, downlink resource block (Resource Block) allocation information, UE-ID, number of streams, information on precoding vector (Precoding Vector), data size regarding downlink shared channel , Modulation scheme, HARQ (hybrid automatic repeat request) information, and the like.
- Uplink Scheduling Grant includes, for example, uplink resource block (Resource Block) allocation information, UE-ID, data size, modulation scheme, uplink transmission power information, Uplink, regarding the uplink shared channel.
- Information on demodulation reference signal (demodulation reference signal) in MIMO is included.
- DCI Downlink Control Information
- the mobile station uses the “UE-ID (RNTI)” in the uplink scheduling grant or downlink scheduling to identify whether the uplink scheduling grant or downlink scheduling is transmitted to the mobile station. Do.
- CRC bits included in the uplink scheduling grant and downlink scheduling are masked by the RNTI of the destination mobile station.
- the mobile station performs a CRC check using the CRC bit.
- the CRC check result is OK
- the mobile station determines that an uplink scheduling grant or downlink scheduling is transmitted to the mobile station, and the CRC check result.
- Is NG it is determined that no uplink scheduling grant or downlink scheduling is transmitted to the own station.
- the CRC bit is a bit for determining whether the transmitted signal is erroneously decoded or correctly decoded.
- the number of bits of the CRC bits and the RNTI is, for example, 16 bits.
- a mobile station attempts to decode, for example, 40 uplink scheduling grants or downlink scheduling in one subframe.
- uplink scheduling grants or downlink scheduling signals actually transmitted to the own station, signals transmitted to other mobile stations, and any signals are included. This includes signals that are not transmitted and contain only noise.
- the radio base station eNB starts from a subframe (assignment start time) specified by PDCCH (uplink scheduling grant or downlink scheduling information).
- PDCCH uplink scheduling grant or downlink scheduling information
- uplink or downlink radio resources PUSCH or PDSCH
- PUSCH or PDSCH uplink or downlink radio resources
- the allocation start time is a subframe in which downlink scheduling information is transmitted in the case of downlink, and is an uplink transmission subframe specified by an uplink scheduling grant in the case of uplink. is there.
- the predetermined period is 20 ms, for example.
- uplink scheduling grant or downlink scheduling information is transmitted via PDCCH only for the first transmission, and uplink scheduling grant or downlink scheduling information is transmitted via PDCCH in subsequent transmissions. Therefore, it is possible to reduce radio resources (overhead) necessary for transmitting the uplink scheduling grant or the downlink scheduling information, and as a result, efficient communication is possible.
- uplink scheduling grant or downlink scheduling information there are two types of uplink scheduling grant or downlink scheduling information: a case of notifying resource allocation by dynamic scheduling and a case of notifying resource allocation by persistent scheduling.
- the assignment between the dynamic scheduling and the persistent scheduling is identified based on, for example, the uplink scheduling grant or the RNTI set in the downlink scheduling information.
- an RNTI for dynamic scheduling and an RNTI for persistent scheduling are defined, and based on the CRC check result, it is identified whether the allocation is based on the dynamic scheduling or the persistent scheduling.
- whether the uplink scheduling grant or the downlink scheduling information notifies the allocation by the dynamic scheduling or the allocation by the persistent scheduling is determined by the uplink scheduling grant or the downlink scheduling information. This is performed based on RNTI or the like in the link scheduling information.
- the mobile station attempts to decode about 40 uplink scheduling grants or downlink scheduling information in one subframe (within 1 ms).
- False Alarm means that although the radio base station has not transmitted an uplink scheduling grant or downlink scheduling information to the mobile station, the mobile station transmits an uplink to itself. An event that determines that a scheduling grant or downlink scheduling information has been transmitted.
- the resource allocation by the uplink scheduling grant and downlink scheduling information is basically limited to the subframe, so the influence of the false alarm is small.
- an allocation start point is specified by the uplink scheduling grant and downlink scheduling information, and periodically and fixedly starting from the allocation start point. Since radio resources are allocated, the impact of False Alarm is enormous.
- False Alarm is not an RNTI but a PDCCH that instructs a fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling” based on a specific 1 bit in the PDCCH, or This is also a problem that can occur in the same way even when it is configured to determine whether the PDCCH is a dynamically assigned PDSCH (downlink radio resource) for normal downlink scheduling.
- An object of the present invention is to provide a mobile station and a radio base station.
- a first feature of the present invention is mobile communication in which a mobile station receives downlink data transmitted from a radio base station using downlink radio resources that are fixedly assigned at a predetermined period starting from an allocation start time.
- the movement The gist is that the station discards the fixed assignment signal when the information about the downlink radio resource and the information notified by the fixed assignment signal are inconsistent.
- the first feature of the present invention is a mobile communication method in which a mobile station receives downlink data transmitted from a radio base station using downlink radio resources allocated by predetermined scheduling information at a predetermined period.
- the process A2 for notifying the mobile station of information about the predetermined period and the downlink radio resource, the process B2 of notifying the mobile station of predetermined scheduling information, and the received predetermined scheduling information Starting with a time point determined based on the downlink radio resource allocated by the predetermined scheduling information in the predetermined cycle, and receiving the downlink data, and in step C, the downlink radio
- the information about the resource and the information notified by the predetermined scheduling information are inconsistent. If that is summarized in that to discard the predetermined scheduling information.
- the information on the predetermined period and the downlink radio resource may be notified by an RRC message, and the fixed allocation signal may be notified by downlink control information.
- step A2 information on the predetermined period and the downlink radio resource is notified by an RRC message, and in step B, a downlink control channel is transmitted to the mobile station.
- the predetermined scheduling information may be transmitted via
- the information on the downlink radio resource limits a range of information specified by the fixed allocation signal
- the mobile station in step B1, the mobile station notifies by the fixed allocation signal.
- the information related to the downlink radio resource and the information notified by the fixed allocation signal are inconsistent when the determined information is not included in the range of information specified by the limited fixed allocation signal You may judge.
- the range of information that can be specified by the predetermined scheduling information is limited by information on the downlink radio resource, and is included in the predetermined scheduling information in step C2. May be determined to be inconsistent with the information regarding the downlink radio resource and the information notified by the predetermined scheduling information. .
- the fixed allocation signal that is, the predetermined scheduling information includes resource block allocation information, modulation scheme, data size, MCS information, information about Redundant Version, transmission format information, transmission power control information.
- At least one of HARQ process information and a new data indicator may be included.
- a second feature of the present invention is a mobile communication method in which a mobile station receives downlink data transmitted from a radio base station using downlink radio resources allocated by predetermined scheduling information at a predetermined cycle, Based on the step A for notifying the mobile station of information on the predetermined period and the downlink radio resource, the step B for notifying the mobile station of predetermined scheduling information, and the received predetermined scheduling information Using the downlink radio resource allocated by the predetermined scheduling information from the determined time point as a starting point, and transmitting the downlink data, and the information included in the predetermined scheduling information includes: The gist is that the process C is executed when the content matches the contents designated in advance.
- the predetermined scheduling information includes resource block allocation information, modulation scheme, data size, MCS information, information about Redundant Version, transmission format information, transmission power control information, HARQ process information, new It may include at least one of the data indicators.
- a third feature of the present invention is configured to receive downlink data transmitted from a radio base station using downlink radio resources that are fixedly assigned at a predetermined period starting from the allocation start time.
- a fixed communication information receiving unit configured to receive the predetermined period and information related to the downlink radio resource from the radio base station, and a fixed allocation signal from the radio base station
- a communication unit configured to determine the allocation start time and receive the downlink data via the downlink radio resource from the allocation start time as a starting point. The unit is configured to discard the fixed allocation signal when the information on the downlink radio resource and the information notified by the fixed allocation signal are inconsistent The gist of the door.
- a third feature of the present invention is a mobile station configured to receive downlink data transmitted from a radio base station using downlink radio resources allocated by predetermined scheduling information at a predetermined period.
- a receiving unit configured to receive information about the predetermined period and the downlink radio resource from the radio base station, and a time point determined based on the predetermined scheduling information received from the radio base station
- a communication unit configured to receive downlink data using downlink radio resources allocated by the predetermined scheduling information at the predetermined period, and the communication unit includes the downlink radio
- the information related to the predetermined period and the downlink radio resource may be notified by an RRC message, and the fixed allocation signal may be notified by downlink control information.
- the receiving unit is configured to receive information on the predetermined period and the downlink radio resource via an RRC message
- the communication unit is configured to perform downlink control.
- the predetermined scheduling information may be received via a channel.
- the communication unit includes the information included in the predetermined scheduling information within a range of information that can be specified by the predetermined scheduling information limited by information related to the downlink radio resource. If not, the information regarding the downlink radio resource may be determined to be inconsistent with the information notified by the predetermined scheduling information.
- the fixed allocation signal that is, the predetermined scheduling information includes resource block allocation information, modulation scheme, data size, MCS information, information about Redundant Version, transmission format information, transmission It may include at least one of power control information, HARQ process information, and a new data indicator.
- a fourth feature of the present invention is a mobile station configured to receive downlink data transmitted from a radio base station using downlink radio resources allocated by predetermined scheduling information at a predetermined period.
- a reception unit configured to receive information about the predetermined period and the downlink radio resource from the radio base station, and a time point determined based on the predetermined scheduling information received from the radio base station
- a communication unit configured to receive downlink data using downlink radio resources allocated by the predetermined scheduling information at the predetermined period, and the communication unit is configured to receive the predetermined scheduling information according to the predetermined scheduling information.
- the notified information matches the content specified in advance, the downlink data is received. It is summarized as configured urchin.
- the predetermined scheduling information includes resource block allocation information, modulation scheme, data size, MCS information, information about Redundant Version, transmission format information, transmission power control information, HARQ process information, new It may include at least one of the data indicators.
- a fifth feature of the present invention is mobile communication in which a mobile station receives downlink data transmitted from a radio base station using downlink radio resources that are fixedly assigned at a predetermined period starting from the allocation start time.
- a radio base station used in a system the mobile station being configured to notify the mobile station of the predetermined period and information related to the downlink radio resource, and the mobile station
- a fixed allocation signal transmitter configured to transmit a fixed allocation signal and the downlink radio resource starting from the allocation start time determined by the fixed allocation signal
- a communication unit configured to transmit downlink data, and the fixed allocation transmission unit uses the fixed allocation signal as information on the downlink radio resource. And gist that it is configured to notify the information to limit the scope of the information to be constant.
- the fifth feature of the present invention is used in a mobile communication system in which a mobile station receives downlink data transmitted from a radio base station using downlink radio resources allocated by predetermined scheduling information in a predetermined cycle.
- a first transmitter configured to notify the mobile station of information related to the predetermined period and the downlink radio resource; and predetermined scheduling information for the mobile station
- a communication unit configured to transmit downlink data using the downlink radio resource allocated by the predetermined scheduling information in the predetermined period
- a second transmission unit configured to transmit The first transmission unit is designated by the predetermined scheduling information as information on the downlink radio resource. It is configured to notify the information to limit the range of possible information that is summarized as that.
- the information regarding the predetermined period and the downlink radio resource may be notified by an RRC message, and the fixed allocation signal may be notified by downlink control information.
- the first transmission unit is configured to notify information on the predetermined period and the downlink radio resource by an RRC message, and the second transmission unit The predetermined scheduling information may be notified via a link control channel.
- the fixed allocation signal that is, the predetermined scheduling information includes resource block allocation information, modulation scheme, data size, MCS information, information about Redundant Version, transmission format information, and transmission power control.
- Information, HARQ process information, and a new data indicator may be included.
- the first transmission unit may be configured to determine the range based on a data type.
- a mobile station and a radio base station can be provided.
- FIG. 1 is a functional block diagram of a mobile station according to the first embodiment of the present invention.
- FIG. 2 is a diagram for explaining downlink scheduling information in the mobile communication system according to the first embodiment of the present invention.
- FIG. 3 is a diagram for explaining scheduling performed in the mobile communication system according to the first embodiment of the present invention.
- FIG. 4 is a functional block diagram of the radio base station according to the first embodiment of the present invention.
- FIG. 5 is a flowchart showing the operation of the mobile station according to the first embodiment of the present invention.
- the mobile station UE is transmitted from the radio base station eNB using the PDSCH (downlink radio resource) that is fixedly allocated at a predetermined period starting from the allocation start time. Configured to receive downstream data.
- PDSCH downlink radio resource
- the mobile station UE includes a Persistent information receiving unit 61, a Persistent assignment signal receiving unit 62, and a downlink data receiving unit 63.
- the persistent information receiving unit 61 is configured to receive persistent information including the above-described predetermined period and information related to downlink radio resources from the radio base station eNB.
- the Persistent information receiving unit 61 is configured to notify the Persistent assignment signal receiving unit 62 of information related to the downlink radio resource.
- the Persistent information receiving unit 61 is configured to acquire the Persistent information described above based on the RRC message transmitted by the radio base station eNB.
- the information on the downlink radio resource is, for example, a fixed allocation signal (that is, predetermined scheduling information) to be described later, that is, a PDCCH instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”. This is information for limiting the range of information notified by (downlink scheduling information).
- the information element of PDCCH (downlink scheduling information) instructing the fixed allocation is, for example, information as shown in FIG.
- Form indicator is information indicating whether the PDCCH is information for uplink or information for downlink.
- the information for the downlink is also referred to as simple downlink control information.
- RB assignment information is information indicating resource block allocation information related to the downlink signal specified by the PDCCH.
- MCS information is information indicating information related to MCS related to the downlink signal specified by the PDCCH.
- the information on the MCS is information such as a data size, a modulation scheme, and a redundancy version parameter in HARQ.
- HARQ process information is information indicating HARQ process information of a downlink signal specified by the PDCCH.
- New Data Indicator is information indicating whether the downlink signal specified by the PDCCH is new transmission or retransmission.
- TPC is information for transmission power control of an uplink control signal specified by the PDCCH.
- RNTI / CRC is a CRC bit masked by “UE-ID (RNTI)”.
- the information element of PDCCH (downlink scheduling information) mentioned above is an example, and information elements other than the above may be included, or a part of the above information elements may not be included. Good.
- wireless resource may be the information for restrict
- the information on the downlink radio resource may be information for limiting a range of information notified by the “RB assignment information”.
- the information on the downlink radio resource may be information for limiting the number of resource blocks and the position of the resource block notified by the “RB assignment information”.
- the information on the downlink radio resource may be information that limits the number of resource blocks notified by the “RB assignment information” to “2” or “3”.
- the information on the downlink radio resource may be information that limits the number of resource blocks notified by the “RB assignment information” to “3” or less.
- the information on the downlink radio resource may be information for notifying the maximum value of the number of resource blocks notified by the “RB assignment information”.
- downlink scheduling information when the number of resource blocks notified by the PDCCH (downlink scheduling information) is not “3” or less, information on the downlink radio resource and information notified by the PDCCH (downlink scheduling information) (RB assignment information) is inconsistent.
- the information regarding the downlink radio resource is notified of the maximum value of the number of resource blocks notified by the “RB assignment information”, but may be notified of the minimum value instead.
- the information regarding the downlink radio resource may be notified of both the maximum value and the minimum value of the number of resource blocks notified by the “RB assignment information”.
- “10” may be notified as the maximum value of the number of resource blocks notified by the “RB assignment information”, and “5” may be notified as the minimum value.
- downlink scheduling information when the number of resource blocks notified by the PDCCH (downlink scheduling information) is larger than “10” or smaller than “5”, information on the downlink radio resource and the PDCCH ( Information (RB assignment information) notified by (downlink scheduling information) is inconsistent.
- the information on the downlink radio resource is not limited to the above-described limiting method such as “limit the number of resource blocks” as long as the range of information notified by the “RB assignment information” is limited.
- the range of information notified by the “RB assignment information” may be limited by the restriction method.
- the information on the downlink radio resource may be information for limiting the position in the frequency direction of the resource block notified by the “RB assignment information”.
- the information on the downlink radio resource may be information notified by the “MCS information”, for example, information for limiting a range such as a modulation scheme or a data size.
- the information on the downlink radio resource may be information for limiting a modulation scheme notified by the “MCS information”.
- the information on the downlink radio resource may be information that limits the modulation scheme notified by the “MCS information” to “QPSK”.
- the modulation scheme notified by the PDCCH (downlink scheduling information) is other than “QPSK”, for example, when the modulation scheme is “16QAM”, the information on the downlink radio resource and the PDCCH Information (MCS information) notified by (downlink scheduling information) is inconsistent.
- the information on the downlink radio resource is an example in which the modulation scheme notified by the MCS information is limited to “QPSK”, but is notified by the “MCS information” instead.
- the modulation method may be limited to “16QAM”, may be limited to “64QAM”, or may be limited to two types of “QPSK” and “16QAM”.
- the information regarding the downlink radio resource may be notified of whether or not it is applied for each of the modulation schemes notified by the “MCS information”, “QPSK”, “16QAM”, and “64QAM”.
- the information on the downlink radio resource may be information for limiting the data size notified by the “MCS information”.
- the information on the downlink radio resource may be information that limits the data size notified by the “MCS information” to “320 bits”.
- the data size notified by the PDCCH (downlink scheduling information) is other than “320 bits”, for example, when the data size is “512 bits”, the information about the downlink radio resource and Information (MCS information) notified by the PDCCH (downlink scheduling information) is inconsistent.
- MCS information downlink radio resource and Information
- one type of data size is specified, but two or more types of data size may be specified.
- the information on the downlink radio resource may be information that limits the data size notified by the “MCS information” to “320 bits” and “640 bits”.
- the information on the downlink radio resource may be information that limits the data size notified by the “MCS information” to “320 bits” or less.
- the data size notified by the PDCCH (downlink scheduling information) is larger than “320 bits”, for example, when the data size is “512 bits”, the information about the downlink radio resource and Information (MCS information) notified by the PDCCH (downlink scheduling information) is inconsistent.
- MCS information downlink radio resource and Information
- 320 bits is an example, and a number of bits other than “320 bits” may be designated.
- the maximum value of the data size is specified, but instead, the minimum value of the data size may be specified.
- both the maximum value and the minimum value of the data size may be specified.
- “640 bits” may be specified as the maximum value of the data size
- “320 bits” may be specified as the minimum value.
- downlink scheduling information when the data size notified by the PDCCH (downlink scheduling information) is larger than “640 bits” or smaller than “320 bits”, the information on the downlink radio resource and the PDCCH ( The information (MCS information) notified by (downlink scheduling information) is inconsistent.
- the information about the downlink radio resource indicates the case where the information notified by the “RB assignment information” or the information notified by the “MCS information” is limited.
- the information elements other than the above may be restricted in the same manner by the information on the downlink radio resource.
- information notified by “HARQ process information” may be limited by information on the downlink radio resource.
- the HARQ process number notified by the “HARQ process information” based on the information on the downlink radio resource is It may be limited to # 1 and # 2.
- the maximum value or the minimum value of the HARQ process number notified by “HARQ process information” may be notified, or the presence / absence of application may be notified for each number.
- RB assignment information and “MCS information” are information on resource blocks, modulation methods, and data sizes, and may be called “information on transmission format”.
- the persistent assignment signal receiving unit 62 is configured to receive a fixed assignment signal from the radio base station eNB.
- the persistent allocation signal reception unit 62 allocates a fixed allocation of PDSCH (downlink radio resource) for “persistent scheduling” transmitted from the radio base station eNB to the local station as a fixed allocation signal. Is configured to receive PDCCH (downlink scheduling information).
- the Persistent allocation signal receiving unit 62 instructs the PDCCH (downlink radio resource) for fixed allocation of the PDSCH (downlink radio resource) for “Persistent scheduling” to the own station. It may be configured to determine whether or not (link scheduling information) has been transmitted.
- the persistent allocation signal receiving unit 62 determines whether the PDCCH that dynamically allocates the PDSCH (downlink radio resource) based on the RNTI or the like set in the PDCCH, that is, whether it is downlink scheduling information for dynamic scheduling. It may be configured to determine.
- PDCCH downlink scheduling information
- the persistent allocation signal receiving unit 62 Is a PDCCH (downlink schedule) for instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling” based on the 1 bit.
- PDCCH downlink scheduling information
- a part of information elements in the PDCCH is PDCCH (downlink scheduling information) instructing fixed allocation of PDSCH (downlink radio resource) for “persistent scheduling”.
- the persistent allocation signal receiving unit 62 is defined so as to indicate whether it is PDCCH that dynamically allocates PDSCH (downlink radio resource), that is, downlink scheduling information for dynamic scheduling.
- the Persistent allocation signal receiving unit 62 is configured to receive information related to the downlink radio resource from the Persistent information receiving unit 61.
- the information on the downlink radio resource is, as described above, the PDCCH (downlink scheduling) that instructs the fixed allocation of the fixed allocation signal, that is, the PDSCH (downlink radio resource) for “Persistent scheduling”.
- Information is information for limiting the range of information notified.
- the persistent allocation signal receiving unit 62 includes information on the downlink radio resource and PDCCH (downlink scheduling information for instructing fixed allocation of the fixed allocation signal, that is, PDSCH (downlink radio resource) for “persistent scheduling”. ),
- the fixed allocation signal that is, the PDSCH (downlink radio resource) for “Persistent scheduling”, which has been determined to have been transmitted to the local station, PDCCH (downlink scheduling information) instructing allocation is discarded.
- the persistent assignment signal receiving unit 62 is notified by the fixed assignment signal, that is, the PDCCH (downlink scheduling information) instructing the fixed assignment of the PDSCH (downlink radio resource) for “persistent scheduling”. This information is considered to have not been sent to the local station.
- the persistent allocation signal receiving unit 62 instructs the fixed allocation of the fixed allocation signal, that is, the PDSCH (downlink radio resource) for “persistent scheduling”, which has not been discarded in the above-described processing. Scheduling information) is provided to the downlink data receiver 63.
- the PDCCH downlink scheduling information
- the information on the downlink radio resource is information that limits the number of resource blocks notified by the “RB assignment information” to “2” or “3”
- the PDCCH downlink scheduling information
- the number of resource blocks notified by the above is neither “2” nor “3”
- the information on the downlink radio resource and the information notified by the PDCCH (downlink scheduling information) (RB assignment information) are inconsistent. Then, the PDCCH (downlink scheduling information) is discarded.
- the PDCCH downlink scheduling information
- the number of notified resource blocks is not “3” or less, for example, when the number of such resource blocks is “5”
- notification is made by information on the downlink radio resource and the PDCCH (downlink scheduling information). It is determined that the received information (RB assignment information) is inconsistent, and the PDCCH (downlink scheduling information) is discarded.
- the PDCCH when the information on the downlink radio resource is information that limits the number of resource blocks notified by the “RB assignment information” to “10” or less and “5” or more, the PDCCH When the number of resource blocks notified by (downlink scheduling information) is larger than “10” or when the number of such resource blocks is smaller than “5”, for example, the number of such resource blocks is “12”. If it is determined that the information on the downlink radio resource and the information (RB assignment information) notified by the PDCCH (downlink scheduling information) are inconsistent, the PDCCH (downlink scheduling information) ) Discards.
- the PDCCH downlink scheduling information
- the notified modulation scheme is neither “QPSK” nor “16QAM”
- the modulation scheme is “64QAM”
- information on the downlink radio resource and the PDCCH (downlink scheduling information) ) Is determined to be inconsistent with the information (MCS information) notified, and the PDCCH (downlink scheduling information) is discarded.
- the information on the downlink radio resource is information that limits the data size notified by the “MCS information” to “320 bits”
- the information is notified by the PDCCH (downlink scheduling information).
- the data size is not “320 bits”, for example, when the data size is “1024 bits”, information (MCS information) notified by the information on the downlink radio resource and the PDCCH (downlink scheduling information). ) And the PDCCH (downlink scheduling information) is discarded.
- the information on the downlink radio resource is information that restricts the data size notified by the “MCS information” to “320 bits” or less
- the information is notified by the PDCCH (downlink scheduling information).
- the data size is not “320 bits” or less, for example, when the data size is “512 bits”, information about the downlink radio resource and information notified by the PDCCH (downlink scheduling information) ( It is determined that there is a discrepancy with MCS information), and the PDCCH (downlink scheduling information) is discarded.
- the PDCCH when the information regarding the downlink radio resource is information that restricts the data size notified by the “MCS information” to “640 bits” or less and “320 bits” or more, the PDCCH ( When the data size notified by the downlink scheduling information) is larger than “640 bits”, or when the data size is smaller than “320 bits”, for example, when the data size is “1024 bits”. Determines that the information on the downlink radio resource and the information (MCS information) notified by the PDCCH (downlink scheduling information) are inconsistent, and discards the PDCCH (downlink scheduling information).
- the PDCCH downlink scheduling information
- the HARQ process number notified by is not # 1 or # 2
- the number is # 3
- the persistent allocation signal receiving unit 62 instructs information regarding the downlink radio resource and the fixed allocation of the fixed allocation signal, that is, PDSCH (downlink radio resource) for “persistent scheduling”.
- PDSCH downlink radio resource
- the fixed allocation signal that is, the PDCCH (downlink scheduling information) instructing the fixed allocation of the PDSCH (downlink radio resource) for “Persistent scheduling” may be discarded.
- the persistent assignment signal receiving unit 62 uses the fixed assignment signal, that is, “persistent scheduling” when the maximum receivable data size is “10000 bits” as the capability (capability) of the mobile station. If it is instructed to receive a downlink signal having a data size of “20000 bits” by PDCCH (downlink scheduling information) instructing fixed allocation of PDSCH (downlink radio resource), the fixed May be discarded, that is, PDCCH (downlink scheduling information) instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”.
- PDCCH downlink scheduling information
- the fixed May be discarded, that is, PDCCH (downlink scheduling information) instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”.
- the fixed allocation signal that is, the PDCCH (downlink scheduling information) instructing the fixed allocation of the PDSCH (downlink radio resource) for “Persistent scheduling” has no meaningful bit pattern as information. Exists.
- the persistent allocation signal receiving unit 62 is a part of the fixed allocation signal, that is, a bit of PDCCH (downlink scheduling information) instructing the fixed allocation of the PDSCH (downlink radio resource) for “persistent scheduling”.
- the fixed allocation signal that is, PDCCH (downlink scheduling information) instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling” is discarded. May be.
- bit pattern has no meaning as information may be expressed in other words as a bit pattern that should not be notified.
- the persistent assignment signal receiving unit 62 performs the fixed assignment of the fixed assignment signal, that is, the PDSCH (downlink radio resource) for “persistent scheduling”, regardless of the information on the downlink radio resource. It may be determined whether a part of the bit pattern of the indicated PDCCH (downlink scheduling information) has meaning as information.
- the persistent allocation signal receiving unit 62 performs the fixed allocation of the above-described fixed allocation signal, that is, PDSCH (downlink radio resource) for “Persistent scheduling”, when there is no information regarding the downlink radio resource. It may be determined whether a part of the bit pattern of PDCCH (downlink scheduling information) instructing is meaningful as information.
- the bit pattern indicating a value larger than “10” is a bit pattern that should not be notified.
- the mobile station UE discards the fixed allocation signal.
- the bit pattern indicating a value larger than “1000” the bit pattern should not be notified.
- the mobile station UE discards the fixed allocation signal when the value of the data size indicated by “MCS information” in the fixed allocation signal is larger than “1000”.
- the “when the value of the data size indicated by“ MCS information ”is larger than“ 1000 ”” may mean that some bits of the “MCS information” are not a predetermined value, for example. Good.
- the data size is defined by a 4-digit binary number (hereinafter referred to as “abcd”; the first “a” is “Most Significant bit”), the data size is expressed in decimal. Then:
- the mobile station UE may discard the fixed assignment signal when some bits of the “MCS information” in the fixed assignment signal are not a predetermined value.
- the mobile station UE when “Most significant bit” of “MCS information” in the fixed allocation signal is not a predetermined value (for example, in the above example, “Most significant bit” is not “0”). Or a case where the value of a predetermined number of bits consecutive from “Most significant bit” is not a predetermined value (for example, in the above example, “the value of two consecutive bits is not a predetermined value. Assuming that there is no “when”, the values of both “a” and “b” are not “0”), the fixed allocation signal may be discarded.
- the modulation scheme indicated by “MCS information” in FIG. 2 is always defined as “QPSK”
- the modulation scheme indicated by “MCS information” is “ A bit pattern indicating “16QAM” or “64QAM” is a bit pattern that should not be notified.
- the mobile station UE discards the fixed allocation signal.
- the fixed allocation signal is basically a signal for instructing new transmission, so that a bit pattern that specifies a modulation method at the time of retransmission in the “MCS information” is a bit that should not be notified. It becomes a pattern.
- the mobile station UE discards the fixed assignment signal when the “MCS information” in the fixed assignment signal is a bit pattern designating a modulation method at the time of retransmission.
- the mobile station UE discards the fixed assignment signal when the value of “TPC” in the fixed assignment signal is “0”.
- the number of bits of “TPC” is “1”, but may be a value other than “1”, for example, “2” or “3”.
- the number of bits of “TPC” is “2” and it is defined that “11” is always set as the value of “TPC”, “10”, “01”, “00” is a bit pattern that should not be notified.
- Bit patterns other than “111” are bit patterns that should not be notified.
- the mobile station UE discards the fixed allocation signal when the value of “HARQ process information” in the fixed allocation signal is other than “111”.
- the number of bits of “HARQ process information” is “3”, but may be a value other than “3”, for example, “2” or “4”.
- the “Redundancy Version” is defined.
- a bit pattern other than “11” as a value of “” is a bit pattern that should not be notified.
- the mobile station UE discards the fixed allocation signal.
- the number of bits of “Redundancy Version” is “2”, but may be a value other than “2”, for example, “1” or “3”.
- the mobile station UE discards the fixed allocation signal when the value of “New Data Indicator” in the fixed allocation signal is “0”.
- the mobile station UE may identify the above-described “bit pattern that should not be notified” based on information in the fixed allocation signal received in the past.
- the mobile station UE sets a bit pattern indicating a data size other than “320 bits”, It may be regarded as a bit pattern that should not be notified.
- the mobile station UE fixes the same data size “3 times” or more in the past.
- a bit pattern indicating a data size other than the data size may be regarded as a bit pattern that should not be notified.
- the mobile station UE should not be notified of a bit pattern indicating a data size other than the data size when receiving a fixed allocation signal having the same data size continuously “three times” or more in the past. It may be regarded as a bit pattern.
- the number “320 bits” and the number “three times” are merely examples, and values other than those described above may be used.
- a process of discarding a plurality of PDCCHs instructing the fixed assignment is performed, and when it is determined that the PDCCH is discarded in at least one process, a process of discarding the PDCCH is performed. May be.
- the downlink data receiving unit 63 is configured to receive downlink data transmitted via a PDSCH (downlink radio resource) allocated by the PDCCH.
- PDSCH downlink radio resource
- the downlink data receiving unit 63 receives, from the persistent allocation signal receiving unit 62, the above-described persistent allocation signal (fixed allocation signal), that is, the fixed allocation of PDSCH (downlink radio resource) for “persistent scheduling”.
- the PDCCH (downlink scheduling information) instructing the PDCCH is received, the subframe in which the PDCCH is transmitted is determined as the above-mentioned “allocation start time”, and the above “predetermined period” ”Is fixedly received via the PDSCH (downlink radio resource) for“ Persistent scheduling ”.
- the downlink data receiving unit 63 transmits the transmission subframe # in which the PDCCH is transmitted.
- 3 is configured to receive downlink data via a PDSCH (downlink radio resource) mapped to a resource block (a set of subcarriers) in the network.
- PDSCH downlink radio resource
- the downlink data receiving unit 63 starts PDSCH (downlink radio resource) mapped to the resource block (set of subcarriers) specified by the PDCCH with a period of 20 ms (predetermined period) starting from subframe # 3. Via the network, and is configured to receive downlink data.
- the downlink data reception unit 63 transmits the PDSCH (downlink radio resource) mapped to the resource block (set of subcarriers) specified by the PDCCH in subframes # 3, # 23, # 43,. , Configured to receive downlink data.
- PDSCH downlink radio resource
- the radio base station eNB is configured to notify the mobile station UE of information regarding the above-described predetermined period and downlink radio resources.
- the radio base station eNB includes a Persistent information transmitter 71, a Persistent assignment signal transmitter 72, and a downlink data transmitter 73.
- the Persistent information transmission unit 71 is configured to transmit Persistent information (fixed communication information) including the above-described predetermined period and information regarding downlink radio resources to the mobile station UE.
- the Persistent information transmission unit 71 is configured to notify the above-described Persistent information to the mobile station UE using an RRC message.
- the information on the downlink radio resource is notified by, for example, a fixed allocation signal, that is, a PDCCH (downlink scheduling information) instructing a fixed allocation of a PDSCH (downlink radio resource) for “Persistent scheduling”.
- a PDCCH downlink scheduling information
- PDSCH downlink radio resource
- the persistent information transmission unit 71 may set information on the downlink radio resource based on the data type.
- the persistent information transmission unit 71 limits the number of resource blocks notified by the “RB assignment information” to the information about the downlink radio resource to “3” or less.
- the information on the downlink radio resource is set to information that limits the number of resource blocks notified by the “RB assignment information” to “10” or less. May be.
- the persistent information transmission unit 71 sets the information on the downlink radio resource to information that restricts the modulation scheme notified by the “MCS information” to “QPSK”.
- the information on the downlink radio resource may be set to information that restricts the modulation scheme notified by the “MCS information” to “QPSK” or “16QAM”.
- the persistent information transmission unit 71 sets the information regarding the downlink radio resource to information that restricts the data size notified by the “MCS information” to “320 bits”.
- the information on the downlink radio resource may be set to information that restricts the data size notified by the “MCS information” to “640 bits”.
- the information notified by the fixed allocation signal that is, the PDCCH (downlink scheduling information) instructing the fixed allocation of the PDSCH (downlink radio resource) for “Persistent scheduling” is limited. May be determined according to the data type of data to which resources are allocated by persistent scheduling.
- service type indicates a type of service that transmits a packet, and may include, for example, a VoIP service, a voice service, a streaming service, an FTP (File Transfer Protocol) service, and the like.
- the persistent information transmission unit 21 sets information on the downlink radio resource based on “data type”, but instead, “contract type”, “logical channel type”, “cell type”, Information on the downlink radio resource may be set based on the “priority type”.
- contract type indicates the type of contract that the user of the mobile station UE has subscribed to, and includes, for example, a Low Class contract, a High Class contract, a flat-rate billing contract, a pay-as-you-go contract, and the like.
- the “cell type” is a cell operation mode, and can be indoor, outdoor, urban or countryside.
- Logical channel type is a type of logical channel such as Dedicated Control Channel (DCCH) or Dedicated Traffic Channel (DTCH). A plurality of logical channels may be further defined in the DCCH and DTCH.
- DCCH Dedicated Control Channel
- DTCH Dedicated Traffic Channel
- Radio Bearer means a bearer that transmits data and is defined on a one-to-one basis with respect to the logical channel to be transmitted, and as a result, is almost synonymous with the logical channel.
- the “priority type” is a class for classifying priorities related to transmission of downlink and uplink data. For example, data of the first priority class is data of the second priority class. It is transmitted with priority over.
- priority type may be bundled with the above-mentioned Logical Channel, and may be called “Logical Channel Priority”. Alternatively, the “priority type” may be defined as “Priority Class”.
- the persistent assignment signal transmission unit 72 is configured to transmit a fixed assignment signal to the mobile station UE.
- the persistent allocation signal transmission unit 72 instructs the mobile station UE to perform fixed allocation of PDSCH (downlink radio resource) for “persistent scheduling” as a fixed allocation signal (downlink). Scheduling information).
- PDSCH downlink radio resource
- the persistent assignment signal transmission unit 72 is defined as “1” is always set as the value of “TPC (see FIG. 2)” in the fixed assignment signal. Alternatively, “1” may always be set as the value of “TPC”.
- the persistent assignment signal transmission unit 72 is defined as “111” is always set as the value of “HARQ process information (see FIG. 2)” in the fixed assignment signal as described above. In such a case, “111” may always be set as the value of the “HARQ process information”.
- the persistent assignment signal transmission unit 72 is defined as “11” being always set as the value of “Redundancy Version” in the fixed assignment signal. “11” may always be set as the value of the “Redundancy Version”.
- the persistent assignment signal transmission unit 72 defines that “1” is always set as the value of “New Data Indicator (see FIG. 2)” in the fixed assignment signal. In such a case, “1” may always be set as the value of the “New Data Indicator”.
- the downlink data transmission unit 73 is configured to transmit downlink data transmitted via a PDSCH (downlink radio resource) assigned by the PDCCH.
- PDSCH downlink radio resource
- the downlink data transmission unit 73 transmits the subframe in which the PDCCH is transmitted to the “allocation” described above. It is determined as a “start time”, and is configured to transmit downlink data via the PDSCH (downlink radio resource) for “Persistent scheduling” fixedly at the “predetermined period” with the “allocation start time” as the start Has been.
- step S201 the mobile station UE receives Persistent information including the above-described predetermined period and information on downlink radio resources from the radio base station eNB by an RRC message or the like.
- the information on the downlink radio resource is notified by, for example, a fixed allocation signal, that is, a PDCCH (downlink scheduling information) instructing a fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”.
- a fixed allocation signal that is, a PDCCH (downlink scheduling information) instructing a fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”. This is information for limiting the range of information.
- the description of the information on the downlink radio resource is the same as the description in the mobile station UE, and is omitted here.
- step S202 the mobile station UE receives a Persistent assignment signal (fixed assignment signal) transmitted via the PDCCH by the radio base station eNB.
- a Persistent assignment signal (fixed assignment signal) transmitted via the PDCCH by the radio base station eNB.
- the mobile station UE gives a PDCCH (downlink scheduling information) instructing a fixed allocation of PDSCH (downlink radio resource) for “persistent scheduling” as a fixed allocation signal from the radio base station eNB. Receive.
- PDCCH downlink scheduling information
- PDSCH downlink radio resource
- step S203 the mobile station UE and the PDCCH (downlink scheduling) instructing the fixed allocation of the downlink radio resource and the fixed allocation signal, that is, PDSCH (downlink radio resource) for “Persistent scheduling”. It is determined whether or not the information notified by (information) is inconsistent.
- the mobile station UE is notified by information related to the downlink radio resource and the fixed allocation signal, that is, PDCCH (downlink scheduling information) instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”. If it is determined that there is a contradiction with the information to be performed (step S203: YES), the operation proceeds to step S204.
- PDCCH downlink scheduling information
- PDSCH downlink radio resource
- step S204 the mobile station UE discards the fixed allocation signal, that is, the PDCCH (downlink scheduling information) instructing the fixed allocation of the PDSCH (downlink radio resource) for “Persistent scheduling”.
- the mobile station UE does not receive the information notified by the fixed allocation signal, that is, the PDCCH (downlink scheduling information) instructing the fixed allocation of the PDSCH (downlink radio resource) for “Persistent scheduling”. It is considered that it was not sent to the station.
- the PDCCH downlink scheduling information
- PDSCH downlink radio resource
- step S205 the mobile station UE receives the above-described persistent allocation signal (fixed allocation signal), that is, PDCCH (downlink scheduling information) instructing the fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”.
- the transmitted subframe is determined as the above-described allocation start time, and downlink data reception via the PDSCH (downlink radio resource) for “Persistent scheduling” is fixed at the above-described predetermined period from the allocation start time. Start.
- the mobile station UE receives downlink data via the PDSCH (downlink radio resource) for persistent scheduling until the PDSCH (downlink radio resource) for “Persistent scheduling” is released.
- the above-mentioned False Alarm is an event in which the mobile station UE determines that the PDCCH is accidentally transmitted to the subject station even though the PDCCH is not transmitted to the subject station. It is highly possible that the information is random information.
- the mobile station UE when the mobile station UE has a limit on the range of information in the PDCCH and receives a PDCCH having information other than the above limit, by performing a process of discarding the PDCCH, It becomes possible to greatly reduce the probability of the False Alarm.
- the number of bits other than CRC in the PDCCH is “24 bits”, and the range of “12 bits” is limited.
- the bit pattern of the “12 bits” is limited to one.
- PALCH False Alarm of downlink scheduling information
- the software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM).
- RAM Random Access Memory
- flash memory ROM (Read Only Memory)
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM.
- it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
- Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the mobile station UE or the radio base station eNB. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE or the radio base station eNB.
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Abstract
Description
図1を参照して、本発明の第1の実施形態に係る移動通信システムの構成について説明する。なお、本実施形態では、LTE方式の移動通信システムを例に挙げて説明するが、本発明は、他方式の移動通信システムにも適用可能である。
ここで、「Most Significant bit」である「a」が「0」でない場合、すなわち、「1」である場合、データサイズは「8」以上となる。
図5を参照して、本発明の第1の実施形態に係る移動通信システムの動作について説明する。
上述したように、1個のPDCCH(上りリンクスケジューリンググラント又は下りリンクスケジューリング情報)に対するFalse Alarmの確率は、1/216となる。
40×1/216×212/224=1.5×10-7
と計算され、大幅に小さくなる。
なお、上述の移動局UEや無線基地局eNBの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。
Claims (16)
- 移動局が、所定周期で、所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、無線基地局から送信される下りデータを受信する移動通信方法であって、
前記移動局に対して、前記所定周期及び前記下り無線リソースに関する情報を通知する工程Aと、
前記移動局に対して、所定スケジューリング情報を通知する工程Bと、
受信した前記所定スケジューリング情報に基づいて決定された時点を起点として、前記所定周期で、該所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、下りデータを受信する工程Cとを有し、
前記工程Cにおいて、前記下り無線リソースに関する情報と前記所定スケジューリング情報により通知された情報とが矛盾している場合に、該所定スケジューリング情報を破棄することを特徴とする移動通信方法。 - 前記工程Aにおいて、RRCメッセージにより、前記所定周期及び前記下り無線リソースに関する情報を通知し、
前記工程Bにおいて、前記移動局に対して、下りリンク制御チャネルを介して、前記所定スケジューリング情報を送信することを特徴とする請求項1に記載の移動通信方法。 - 前記工程Aにおいて、前記下り無線リソースに関する情報によって、前記所定スケジューリング情報により指定可能な情報の範囲を限定し、
前記工程Cにおいて、前記所定スケジューリング情報に含まれる情報が、前記下り無線リソースに関する情報によって限定された前記範囲に含まれない場合、前記下り無線リソースに関する情報と前記所定スケジューリング情報により通知された情報とが矛盾していると判断することを特徴とする請求項1に記載の移動通信方法。 - 前記所定スケジューリング情報は、リソースブロックの割当情報、変調方式、データサイズ、MCS情報、Redundanct Versionに関する情報、送信フォーマット情報、送信電力制御情報、HARQのプロセス情報、新規データインディケータの少なくとも1つを含むことを特徴とする請求項1に記載の移動通信方法。
- 移動局が、所定周期で、所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、無線基地局から送信される下りデータを受信する移動通信方法であって、
前記移動局に対して、前記所定周期及び前記下り無線リソースに関する情報を通知する工程Aと、
前記移動局に対して、所定スケジューリング情報を通知する工程Bと、
受信した前記所定スケジューリング情報に基づいて決定された時点を起点として、前記所定周期で、該所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、下りデータを送信する工程Cとを有し、
前記所定スケジューリング情報に含まれる情報が、予め指定されている内容と合致する場合に、前記工程Cを実行することを特徴とする移動通信方法。 - 前記所定スケジューリング情報は、リソースブロックの割当情報、変調方式、データサイズ、MCS情報、Redundanct Versionに関する情報、送信フォーマット情報、送信電力制御情報、HARQのプロセス情報、新規データインディケータの少なくとも1つを含むことを特徴とする請求項5に記載の移動通信方法。
- 所定周期で、所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、無線基地局から送信される下りデータを受信するように構成されている移動局であって、
前記無線基地局から、前記所定周期及び前記下り無線リソースに関する情報を受信するように構成されている受信部と、
前記無線基地局から受信した前記所定スケジューリング情報に基づいて決定された時点を起点として、前記所定周期で、該所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、下りデータを受信するように構成されている通信部とを具備し、
前記通信部は、前記下り無線リソースに関する情報と前記所定スケジューリング情報により通知された情報とが矛盾している場合に、該所定スケジューリング情報を破棄するように構成されていることを特徴とする移動局。 - 前記受信部は、RRCメッセージを介して、前記所定周期及び前記下り無線リソースに関する情報を受信するように構成されており、
前記通信部は、下りリンク制御チャネルを介して、前記所定スケジューリング情報を受信するように構成されていることを特徴とする請求項7に記載の移動局。 - 前記通信部は、前記所定スケジューリング情報に含まれる情報が、前記下り無線リソースに関する情報によって限定された前記所定スケジューリング情報により指定可能な情報の範囲に含まれない場合、前記下り無線リソースに関する情報と前記所定スケジューリング情報により通知された情報とが矛盾していると判断するように構成されていることを特徴とする請求項7に記載の移動局。
- 前記所定スケジューリング情報は、リソースブロックの割当情報、変調方式、データサイズ、MCS情報、Redundanct Versionに関する情報、送信フォーマット情報、送信電力制御情報、HARQのプロセス情報、新規データインディケータの少なくとも1つを含むことを特徴とする請求項7に記載の移動局。
- 所定周期で、所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、無線基地局から送信される下りデータを受信するように構成されている移動局であって、
前記無線基地局から、前記所定周期及び前記下り無線リソースに関する情報を受信するように構成されている受信部と、
前記無線基地局から受信した前記所定スケジューリング情報に基づいて決定された時点を起点として、前記所定周期で、該所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、下りデータを受信するように構成されている通信部とを具備し、
前記通信部は、前記所定スケジューリング情報により通知された情報が、予め指定されている内容と合致する場合に、前記下りデータを受信するように構成されていることを特徴とする移動局。 - 前記所定スケジューリング情報は、リソースブロックの割当情報、変調方式、データサイズ、MCS情報、Redundanct Versionに関する情報、送信フォーマット情報、送信電力制御情報、HARQのプロセス情報、新規データインディケータの少なくとも1つを含むことを特徴とする請求項11に記載の移動局。
- 移動局が、所定周期で、所定スケジューリング情報によって割り当てられた下り無線リソースを用いて、無線基地局から送信される下りデータを受信する移動通信システムで用いられる無線基地局であって、
前記移動局に対して、前記所定周期及び前記下り無線リソースに関する情報を通知するように構成されている第1送信部と、
前記移動局に対して、所定スケジューリング情報を送信するように構成されている第2送信部と、
前記所定周期で、前記所定スケジューリング情報により割り当てられた前記下り無線リソースを用いて、下りデータを送信するように構成されている通信部とを具備し、
前記第1送信部は、前記下り無線リソースに関する情報として、前記所定スケジューリング情報により指定可能な情報の範囲を限定する情報を通知するように構成されていることを特徴とする無線基地局。 - 前記第1送信部は、RRCメッセージにより、前記所定周期及び前記下り無線リソースに関する情報を通知するように構成されており、
前記第2送信部は、下りリンク制御チャネルを介して、前記所定スケジューリング情報を通知するように構成されていることを特徴とする請求項13に記載の無線基地局。 - 前記所定スケジューリング情報は、リソースブロックの割当情報、変調方式、データサイズ、MCS情報、Redundanct Versionに関する情報、送信フォーマット情報、送信電力制御情報、HARQのプロセス情報、新規データインディケータの少なくとも1つを含むことを特徴とする請求項13に記載の無線基地局。
- 前記第1送信部は、データ種別に基づいて、前記範囲を決定するように構成されていることを特徴とする請求項13に記載の無線基地局。
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