WO2010050232A1 - 無線端末装置、無線基地局装置及びチャネル信号形成方法 - Google Patents
無線端末装置、無線基地局装置及びチャネル信号形成方法 Download PDFInfo
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- WO2010050232A1 WO2010050232A1 PCT/JP2009/005788 JP2009005788W WO2010050232A1 WO 2010050232 A1 WO2010050232 A1 WO 2010050232A1 JP 2009005788 W JP2009005788 W JP 2009005788W WO 2010050232 A1 WO2010050232 A1 WO 2010050232A1
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- downlink
- unit band
- information
- uplink
- allocation information
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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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
-
- 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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
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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
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Definitions
- the present invention relates to a wireless terminal device, a wireless base station device, and a channel signal forming method.
- OFDMA Orthogonal Frequency Division Multiple Access
- SCH Synchronization Channel
- BCH Broadcast Channel
- the terminal first secures synchronization with the base station by capturing the SCH. Thereafter, the terminal acquires parameters (eg, frequency bandwidth) unique to the base station by reading the BCH information (see Non-Patent Documents 1, 2, and 3).
- the terminal establishes communication with the base station by making a connection request to the base station after the acquisition of the parameters unique to the base station is completed.
- the base station transmits control information to terminals with which communication has been established using PDCCH (Physical Downlink ⁇ ⁇ Control ⁇ CHannel) as necessary.
- PDCCH Physical Downlink ⁇ ⁇ Control ⁇ CHannel
- the terminal performs “blind determination” on the received PDCCH signal. That is, the PDCCH signal includes a CRC portion, and this CRC portion is masked by the terminal ID of the transmission target terminal in the base station. Therefore, the terminal cannot determine whether the received PDCCH signal is a PDCCH signal addressed to itself until it demasks the CRC portion of the received PDCCH signal with the terminal ID of the terminal. In this blind determination, if the CRC calculation is OK as a result of demasking, it is determined that the PDCCH signal is addressed to the own device.
- the control information transmitted from the base station includes resource allocation information including resource information allocated to the terminal by the base station.
- the terminal needs to receive both downlink resource allocation information and uplink resource allocation information.
- These downlink resource allocation information and uplink resource allocation information are transmitted using PDCCH signals having the same size.
- the PDCCH signal includes resource allocation information type information (for example, a 1-bit flag). Therefore, even if the PDCCH signal including the downlink resource allocation information and the PDCCH signal including the uplink resource allocation information have the same size, the terminal checks the resource allocation information type information to determine whether the downlink resource allocation information or the uplink resource It can be identified whether it is allocation information.
- the PDCCH format when uplink resource allocation information is transmitted is PDCCH format 0, and the PDCCH format when downlink resource allocation information is transmitted is PDCCH format 1A.
- the uplink bandwidth may be different from the downlink bandwidth, and in this case, the information size (that is, the number of bits necessary for transmission) is different between the downlink resource allocation information and the uplink resource allocation information.
- the information size that is, the number of bits necessary for transmission
- the uplink bandwidth is small, the information size of the uplink resource allocation information is small, and when the downlink bandwidth is small, the information size of the downlink resource allocation information is small.
- zero information is added to the smaller resource allocation information (that is, zero padding is performed), thereby reducing the size of the downlink resource allocation information.
- the size of uplink resource allocation information is made equal. As a result, regardless of whether the content is downlink resource allocation information or uplink resource allocation information, the same size of the PDCCH signal is maintained.
- LTE-A system 3GPP LTE-advanced system
- LTE system 3GPP LTE system
- 3GPP LTE-Advanced it is conceivable that the communication bandwidth is not targeted for the uplink and the downlink due to the difference in throughput requirements for the uplink and the downlink. Specifically, in 3GPP LTE-Advanced, it is conceivable to make the downlink communication bandwidth wider than the uplink communication bandwidth.
- LTE-A base station a base station compatible with the LTE-A system
- LTE-A base station is configured to be able to communicate using a plurality of “unit bands”.
- the “unit band” is a band having a maximum width of 20 MHz and is defined as a basic unit of a communication band.
- the “unit band” (hereinafter referred to as “downlink unit band”) in the downlink is a band delimited by downlink frequency band information in the BCH broadcast from the base station, or the downlink control channel (PDCCH) is a frequency. It may be defined as a band defined by a dispersion width when distributed in a region.
- the “unit band” in the uplink is a band delimited by uplink frequency band information in the BCH broadcast from the base station, or a PUSCH (Physical-Uplink) near the center. In some cases, it is defined as a basic unit of a communication band of 20 MHz or less that includes (Shared CHannel) and includes PUCCH at both ends.
- the “unit band” may be expressed as “Component Carrier (s)” in English in 3GPP LTE-Advanced.
- FIG. 1 is a diagram illustrating an arrangement example of each channel in the LTE-A system in which the communication bandwidth (number of unit bands) is untargeted between the uplink and the downlink.
- the LTE-A base station notifies the terminal of resource allocation information using PDCCH from both of the two downlink unit bands in order to cause the terminal to transmit an uplink signal. Since the uplink unit band is associated with both downlink unit bands, even if uplink resource allocation information is transmitted using the PDCCH of which downlink unit band, the PUSCH is transmitted in the same uplink unit band. Also, downlink resource allocation information may be transmitted from both of the two downlink unit bands, and each downlink resource allocation information is used to instruct the downlink resource allocation information in the downlink unit band from which the downlink resource allocation information has been transmitted to the terminal. It is done.
- the LTE-A terminal can simultaneously receive a plurality of unit bands.
- the LTE terminal can receive only one unit band at the same time. Collecting a plurality of unit bands as an assigned band for single communication in this way is called “carrier aggregation”. Through this carrier aggregation, the throughput can be improved.
- the communication bandwidth of the LTE-A system is 30 MHz on the downlink, and includes a total of two unit bands: a 20 MHz downlink unit band on the low frequency side and a 10 MHz downlink unit band on the high frequency side.
- the uplink is 20 MHz and includes one uplink unit band.
- the downlink unit band and the uplink unit band on the low frequency side have the same bandwidth, the information sizes of the uplink resource allocation information and the downlink resource allocation information are equal for this pair. Therefore, zero padding is not performed.
- the size of the downlink resource allocation information is smaller than that of the downlink resource allocation information having a small size for this pair. Zero information is added until it is equal to the size of the information.
- the zero information itself has no meaning information. That is, since an originally unnecessary signal is included in the downlink control information, when the overall power is constant, the power per information bit that is originally required is reduced.
- the importance of downlink control information is generally higher than that of uplink control information. That is, the downlink control information is used not only for resource allocation information of the downlink data channel but also for scheduling information of other important information (for example, paging information and broadcast information). Therefore, it is desired that the frequency of zero padding for downlink control information is reduced.
- the frequency diversity effect that PDCCH can obtain depends on the bandwidth of the downlink unit band. Therefore, since the frequency diversity effect is small in the downlink unit band having a narrow bandwidth, it is desirable to eliminate as much as possible a factor that degrades the quality. However, with regard to zero padding, the possibility of zero padding increases as the downlink unit band with a narrower bandwidth.
- An object of the present invention is to reduce the frequency of zero information addition processing to downlink resource allocation information when communicating using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band, To provide a radio terminal apparatus, radio base station apparatus, and channel signal forming method capable of preventing quality degradation of downlink resource allocation information.
- a radio terminal apparatus of the present invention is a radio communication terminal apparatus capable of communicating using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band, and includes allocation information for each downlink unit band
- the information size determined from the bandwidth of the corresponding downlink unit band is the information size determined from the bandwidth of the uplink unit band
- the reference information size is determined from the bandwidth of the downlink unit band, and determined from the bandwidth of the corresponding downlink unit band.
- the reference information size is set to the information size determined from the bandwidth of the uplink unit band, and in the remaining downlink unit bands, the reference A control signal reception processing unit is employed in which the information size is an information size determined from the bandwidth of the downlink unit band regardless of the bandwidth of the uplink unit band.
- a radio base station apparatus is a radio communication base station apparatus capable of communicating using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band, wherein a channel signal is provided for each downlink unit band.
- a padding means for adding zero information to the smaller information size until the information size of the downlink allocation information and the uplink allocation information becomes equal in the channel signal including both the downlink allocation information and the uplink allocation information.
- the forming means includes both uplink allocation information and downlink allocation information only in a part of the formed plurality of channel signals, and only downlink allocation information is included in channel signals other than the part. Include the composition.
- the channel signal forming method of the present invention is a channel signal forming method for forming a channel signal including downlink allocation information in each of a plurality of downlink unit bands associated with an uplink unit band, and includes a part of the channel signals.
- the channel signal including both the uplink allocation information and the uplink allocation information including the uplink allocation information of the uplink unit band zero information is added to the smaller information size until the information sizes of the downlink allocation information and the uplink allocation information are equal. To do.
- the present invention when communicating using an uplink unit band and a plurality of downlink unit bands associated with an uplink unit band, by reducing the frequency of zero information addition processing to downlink resource allocation information, It is possible to provide a radio terminal apparatus, radio base station apparatus, and channel signal forming method that can prevent quality degradation of downlink resource allocation information.
- positioning of each channel in the LTE-A system from which the communication bandwidth (number of unit bands) becomes non-object by an uplink and a downlink The block diagram which shows the structure of the base station which concerns on Embodiment 1 of this invention.
- Diagram for explaining operation of base station and terminal The block diagram which shows the structure of the base station which concerns on Embodiment 3 of this invention.
- FIG. 2 is a block diagram showing a configuration of base station 100 according to Embodiment 1 of the present invention.
- the base station 100 includes a control unit 101, a PDCCH generation unit 102, a padding unit 103, modulation units 104 and 105, an SCH / BCH generation unit 106, a multiplexing unit 107, an IFFT unit 108, CP addition section 109, transmission RF section 110, reception RF section 111, CP removal section 112, FFT section 113, extraction section 114, IDFT section 115, and data reception section 116.
- the base station 100 is configured to be able to communicate using an upstream unit band and a plurality of downstream unit bands associated with the upstream unit band.
- the control unit 101 generates uplink resource allocation information and downlink resource allocation information for the terminal 200 described later, outputs the uplink resource allocation information to the PDCCH generation unit 102 and the extraction unit 114, and transmits the downlink resource allocation information to the PDCCH generation unit 102 and The data is output to the multiplexing unit 107.
- the control unit 101 allocates downlink resource allocation information to all of the plurality of downlink unit bands, and allocates uplink resource allocation information to only a part of the plurality of downlink unit bands.
- uplink resource allocation information is allocated to a downlink unit band having a bandwidth closest to the bandwidth of the uplink unit band among a plurality of downlink unit bands associated with one uplink unit band.
- an allocation target downlink unit band to which uplink resource allocation information is allocated may be referred to as “basic unit band (Anchor Carrier)”.
- the control unit 101 outputs the uplink resource allocation information and the downlink resource allocation information to the PDCCH generation unit 102, and transmits information on the basic unit band (hereinafter also referred to as “basic unit band information”) to the PDCCH generation unit 102. Output.
- the basic unit band information may be included in the BCH by the SCH / BCH generation unit 106.
- control unit 101 passes bandwidth comparison information indicating the size of the basic unit band bandwidth and the uplink unit band bandwidth to the padding unit 103 via the PDCCH generation unit 102.
- the PDCCH generation unit 102 generates a PDCCH signal transmitted in each downlink unit band.
- the PDCCH generation unit 102 includes, in the PDCCH signal arranged in the downlink unit band indicated by the basic unit band information, the uplink resource allocation information and the downlink resource allocation information, and the PDCCH signal arranged in other downlink unit bands. Includes only downlink resource allocation information. Thereafter, the PDCCH signal is output to padding section 103.
- the padding section 103 adds zero information to the smaller information size until the information sizes of the downlink resource allocation information and the uplink resource allocation information become equal in the input PDCCH signal. Whether to add zero information to downlink resource allocation information or uplink resource allocation information is determined based on bandwidth comparison information.
- padding section 103 adds a CRC bit to the PDCCH signal after the padding process, and masks the CRC bit with a terminal ID. Padding section 103 then outputs the masked PDCCH signal to modulation section 104.
- Modulation section 104 modulates the PDCCH signal input from PDCCH generation section 102 and outputs the modulated PDCCH signal to multiplexing section 107.
- Modulation section 105 modulates the input transmission data (downlink data) and outputs the modulated transmission data signal to multiplexing section 107.
- the SCH / BCH generation unit 106 generates SCH and BCH, and outputs the generated SCH and BCH to the multiplexing unit 107.
- Multiplexer 107 multiplexes the PDCCH signal input from modulator 104, the data signal input from modulator 105 (that is, the PDSCH signal), and the SCH and BCH input from SCH / BCH generator 106. .
- multiplexing section 107 maps the data signal (PDSCH signal) to the downlink unit band based on the downlink resource allocation information input from control section 101.
- the IFFT unit 108 converts the multiplexed signal into a time waveform, and the CP adding unit 109 obtains an OFDM signal by adding the CP to the time waveform.
- the transmission RF unit 110 performs transmission radio processing (up-conversion, digital analog (D / A) conversion, etc.) on the OFDM signal input from the CP adding unit 109, and transmits it through the antenna. Thereby, an OFDM signal including resource allocation information is transmitted.
- transmission radio processing up-conversion, digital analog (D / A) conversion, etc.
- the reception RF unit 111 performs reception radio processing (down-conversion, analog digital (A / D) conversion, etc.) on the reception radio signal received in the reception band via the antenna, and the obtained reception signal is subjected to the CP removal unit. To 112.
- CP removing section 112 removes the CP from the received signal
- FFT section 113 converts the received signal after the CP removal into a frequency domain signal.
- the extraction unit 114 extracts uplink data from the frequency domain signal input from the FFT unit 113 based on the uplink resource allocation information input from the control unit 101, and the IDFT (Inverse Discrete Fourier transform) unit 115 extracts the extracted signal. Is converted into a time domain signal, and the time domain signal is output to the data receiver 116.
- IDFT Inverse Discrete Fourier transform
- the data receiving unit 116 decodes the time domain signal input from the IDFT unit 115. Data receiving section 116 then outputs the decoded uplink data as received data.
- FIG. 3 is a block diagram showing a configuration of terminal 200 according to Embodiment 1 of the present invention.
- terminal 200 includes reception RF section 201, CP removal section 202, FFT section 203, frame synchronization section 204, separation section 205, broadcast signal reception section 206, PDCCH reception section 207, format
- the determination unit 208 includes a PDSCH reception unit 209, a modulation unit 210, a DFT unit 211, a frequency mapping unit 212, an IFFT unit 213, a CP addition unit 214, and a transmission RF unit 215.
- the reception RF unit 201 is obtained by performing reception radio processing (down-conversion, analog-digital (A / D) conversion, etc.) on the reception radio signal (here, OFDM signal) received in the reception band via the antenna.
- the received signal is output to the CP (Cyclic Prefix) removal unit 202.
- CP removing section 202 removes the CP from the received signal
- FFT (Fast Fourier Transform) section 203 converts the received signal after the CP removal into a frequency domain signal.
- the frequency domain signal is output to the frame synchronization unit 204.
- the frame synchronization unit 204 searches for the SCH included in the signal input from the FFT unit 203 and synchronizes with the base station 100 (frame synchronization). In addition, the frame synchronization unit 204 acquires a cell ID associated with a sequence (SCH sequence) used for the SCH. That is, the frame synchronization unit 204 performs the same process as that of a normal cell search. Then, the frame synchronization unit 204 outputs frame synchronization timing information indicating the frame synchronization timing and a signal input from the FFT unit 203 to the separation unit 205.
- SCH sequence a sequence
- the separation unit 205 Based on the frame synchronization timing information input from the frame synchronization unit 204, the separation unit 205 converts the signal input from the frame synchronization unit 204 into a broadcast signal (that is, BCH), a control signal (that is, PDCCH signal), and data. It separates into a signal (that is, PDSCH signal). Separating section 205 receives information on downlink unit bands from broadcast signal receiving section 206, and extracts a PDCCH signal for each downlink unit band based on this information.
- a broadcast signal that is, BCH
- PDCCH signal that is, PDCCH signal
- Separating section 205 receives information on downlink unit bands from broadcast signal receiving section 206, and extracts a PDCCH signal for each downlink unit band based on this information.
- the broadcast signal reception unit 206 reads the content of the BCH input from the separation unit 205 and acquires information on the configuration of the downlink band and the uplink band of the base station 100.
- the broadcast signal receiving unit 206 acquires, for example, the number of uplink unit bands, the number of downlink unit bands, the identification number and bandwidth of each unit band, the association information between the uplink unit band and the downlink unit band, and the basic unit band information.
- the basic unit band can be obtained from the bandwidth of the upstream unit band and the bandwidth of the downstream unit band.
- the base station 100 includes identification information of the basic unit band in the BCH.
- the broadcast signal reception unit 206 outputs the acquired BCH information to the format determination unit 208 and the PDCCH reception unit 207.
- the PDCCH receiving unit 207 uses the information size of the resource allocation information corresponding to the bandwidth of each downlink unit band, the information size of the resource allocation information corresponding to the bandwidth of the uplink unit band, and the terminal ID of its own device, Blind determination is performed on the PDCCH signal of each downlink unit band.
- the PDCCH receiving unit 207 first determines a reference information size used for processing for each PDCCH signal, and specifies a CRC bit equivalent part included in the PDCCH signal according to the determined reference information size. At this time, as described above, the base station 100 may adjust the information size by zero padding. Therefore, the PDCCH receiving unit 207, in the PDCCH signal of the basic unit band, uses the reference information size (payload) determined from the wider one of the bandwidth of the basic unit band and the bandwidth of the uplink unit band corresponding thereto. The portion corresponding to the CRC bits is specified using (size: Payload size).
- downlink unit bands other than the basic unit band include only downlink resource allocation information. Therefore, the PDCCH receiving unit 207 specifies a CRC bit equivalent part in the downlink unit band other than the basic unit band, using the reference information size corresponding to the bandwidth of the downlink unit band.
- PDCCH receiving section 207 demasks the specified CRC bit equivalent portion with its own terminal ID, and if the CRC calculation result for the entire PDCCH signal is OK, transmits the PDCCH signal to its own device. It is determined that the received PDCCH signal.
- the PDCCH signal determined to be destined for the own device is output to the format determination unit 208.
- the format determination unit 208 determines whether the format of the PDCCH signal is format 0 or format 1A based on the type information of the resource allocation information included in the PDCCH signal received from the PDCCH reception unit 207. If the format determination unit 208 determines that it is format 0, it outputs the uplink resource allocation information included in the PDCCH signal to the frequency mapping unit 212. Also, if the format determination unit 208 determines that it is format 1A, it outputs downlink resource allocation information included in the PDCCH signal to the PDSCH reception unit 209.
- the PDSCH receiving unit 209 extracts received data from the PDSCH signal input from the demultiplexing unit 205 based on the downlink resource allocation information input from the format determining unit 208.
- Modulation section 210 modulates transmission data and outputs the obtained modulated signal to DFT (DiscretecreFourier transform) section 211.
- DFT DiscretecreFourier transform
- the DFT unit 211 converts the modulation signal input from the modulation unit 210 into the frequency domain, and outputs a plurality of obtained frequency components to the frequency mapping unit 212.
- the frequency mapping unit 212 maps the plurality of frequency components input from the DFT unit 211 to the PUSCH arranged in the uplink unit band according to the uplink resource allocation information input from the format determination unit 208.
- the IFFT unit 213 converts the mapped frequency components into a time domain waveform, and the CP adding unit 214 adds a CP to the time domain waveform.
- the transmission RF unit 215 performs transmission wireless processing (up-conversion, digital analog (D / A) conversion, etc.) on the signal to which the CP is added, and transmits the signal via the antenna.
- transmission wireless processing up-conversion, digital analog (D / A) conversion, etc.
- FIG. 4 is a diagram for explaining operations of the base station 100 and the terminal 200.
- one upstream unit band UB1 and three downstream unit bands DB1 to 3 are associated with each other.
- the magnitude relationship of the bandwidth of each unit band in FIG. 4 is as follows.
- the bandwidth of the downlink unit bands DB1 and DB3 is wider than the bandwidth of the uplink unit band UB1.
- the bandwidth of the downlink unit band DB2 is narrower than the bandwidth of the uplink unit band UB1.
- the bandwidth of the downlink unit band DB1 is wider than the bandwidth of the downlink unit band DB3.
- the bandwidth of the downlink unit band DB3 is closer to the bandwidth of the uplink unit band UB1 than the bandwidth of the downlink unit band DB2. That is, here, the downlink unit band DB3 is the basic unit band.
- the base station 100 allocates the uplink unit band UB1 to the terminal 200 as an uplink resource and allocates downlink unit bands DB1 to DB3 as downlink resources.
- the base station 100 includes the uplink resource allocation information and the downlink resource allocation information in the PDCCH signal and transmits to the terminal 200.
- base station 100 does not include uplink resource allocation information in all PDCCH signals, but includes uplink resource allocation information only in PDCCH signals arranged in some downlink unit bands.
- downlink resource allocation information is included in all PDCCH signals.
- the basic unit band is a downstream unit band having a bandwidth closest to the upstream unit band. Therefore, in FIG. 4, the uplink resource allocation information is transmitted only in the downlink unit band DB3 of the basic unit band.
- an arrow from PDCCH to uplink data (UL Data) means that uplink resource allocation information is transmitted on the PDCCH.
- an arrow from PDCCH to downlink data (DL Data) or D-BCH means that downlink resource allocation information is transmitted on the PDCCH.
- a CRC bit is added to the PDCCH signal in the padding section 103.
- the CRC bits are masked by the terminal ID assigned to the terminal 200.
- the information size is adjusted as necessary.
- the adjustment of the information size is performed in the padding section 103 for the PDCCH signal including both the uplink resource allocation information and the downlink resource allocation information (that is, the basic unit band PDCCH signal).
- the padding section 103 zero information is added to the smaller information size until the information sizes of the downlink resource allocation information and the uplink resource allocation information become equal.
- the thickness of each arrow indicates the information size of the corresponding resource allocation information, and the information size of the uplink resource allocation information in the basic unit band is equal to the information size of the downlink resource allocation information. Yes.
- PDCCH receiving section 207 includes information size of resource allocation information corresponding to the bandwidth of each downlink unit band, and information size of resource allocation information corresponding to the bandwidth of uplink unit band And blind determination is performed for the PDCCH signal of each downlink unit band using the terminal ID of the own device.
- the PDCCH receiving unit 207 first determines a reference information size used for processing for each PDCCH signal, and specifies a CRC bit equivalent part included in the PDCCH signal according to the determined reference information size. Specifically, in the PDCCH signal of the downlink unit band DB3, which is the basic unit band, the wider one of the bandwidth of the downlink unit band DB3 and the corresponding bandwidth of the uplink unit band UB1 (that is, downlink) The CRC bit equivalent portion is specified using a reference information size (payload size: Payload size) determined from the bandwidth of the unit band DB3.
- a reference information size payload size: Payload size
- PDCCH receiving unit 207 specifies a CRC bit equivalent part using a reference information size corresponding to the bandwidth of the downlink unit band. In this way, the blind determination processing is switched in the basic unit band and the downlink unit bands other than the basic unit band.
- the PDCCH receiving unit 207 demasks the specified CRC bit equivalent part with its own terminal ID, if the CRC calculation result for the entire PDCCH signal is OK, the PDCCH signal is transmitted to the own machine. It is determined that the received PDCCH signal.
- format determination section 208 determines whether the format of the PDCCH signal is format 0 or format 1A based on the resource allocation information type information included in the PDCCH signal received from PDCCH reception section 207.
- the PDCCH signal including the uplink resource allocation information is limited to those allocated to some downlink unit bands, so that it is zero for the downlink resource allocation information with high importance. Probability of padding can be reduced.
- the basic unit band is a downlink unit band having a bandwidth closest to the bandwidth of the uplink unit band
- the downlink unit band that is zero-padded to the downlink resource allocation information is at most basic. It can be limited to one unit band.
- the PDCCH signal of the downlink unit band other than the basic unit band includes only the downlink resource allocation information. Therefore, the probability that zero padding is performed on downlink resource allocation information can also be reduced. Similarly, regarding the uplink resource allocation information, the number of paddings and the padding frequency can be minimized.
- the information size adjustment is performed so that the information sizes of the downlink resource allocation information and the uplink resource allocation information are equal in the basic unit band PDCCH signal.
- the position of the CRC bit equivalent part in the PDCCH signal can be matched between the downlink resource allocation information and the uplink resource allocation information. Therefore, on the receiving side, the information size (payload size: Payload size) obtained from the wider bandwidth of the basic unit band bandwidth and the corresponding upstream unit band bandwidth, or the basic unit band bandwidth CRC information without distinguishing between downlink resource allocation information and uplink resource allocation information based on the information size determined from the larger one of the downlink resource allocation information determined from the uplink resource allocation information determined from the bandwidth of the uplink unit band A bit equivalent part can be specified. That is, since the same blind determination process can be applied to downlink resource allocation information and uplink resource allocation information, an increase in the number of blind determinations can be prevented.
- Embodiment 1 if the uplink unit band bandwidth and the downlink unit band bandwidth are the same, the same information in the downlink resource allocation information and the uplink resource allocation information of the downlink unit band in the basic unit band The case of having a size has been described.
- the bandwidth of the uplink unit band and the bandwidth of the downlink unit band are the same, the information sizes of the downlink resource allocation information and the uplink resource allocation information are almost equal, but are not necessarily the same. It will not be. This is because when the uplink unit band bandwidth and the downlink unit band bandwidth are the same, the amount of information required for resource location indication is the same, but the amount of information required for information notification related to other controls This is because they are different. Also, the larger the difference between the bandwidth of the uplink unit band and the bandwidth of the downlink unit band, the greater the difference in information size between the downlink resource allocation information and the uplink resource allocation information.
- Control section 101 of base station 100 (FIG. 2) performs uplink resource allocation information determined from the size of the downlink resource allocation information determined from the bandwidth of the basic unit band and the bandwidth of the uplink unit band.
- Information size comparison information indicating the size of the data is passed to the padding unit 103 via the PDCCH generation unit 102.
- the padding section 103 adds zero information to the smaller information size until the information sizes of the downlink resource allocation information and the uplink resource allocation information become equal in the input PDCCH signal. Whether to add zero information to downlink resource allocation information or uplink resource allocation information is determined based on information size comparison information.
- PDCCH receiving section 207 of terminal 200 has information size of resource allocation information corresponding to the bandwidth of each downlink unit band and resource allocation information corresponding to the bandwidth of uplink unit band. Is determined for the PDCCH signal of each downlink unit band using the information size of the terminal and the terminal ID of the own device.
- the PDCCH receiving unit 207 first determines a reference information size used for processing for each PDCCH signal, and specifies a CRC bit equivalent part included in the PDCCH signal according to the determined reference information size. At this time, as described above, the base station 100 may adjust the information size by zero padding. Therefore, in the PDCCH signal of the basic unit band, the PDCCH receiving unit 207 determines the uplink resource determined from the size of the downlink resource allocation information determined from the bandwidth of the basic unit band and the bandwidth of the corresponding uplink unit band. The larger one of the allocation information sizes is set as a reference information size (payload size: Payload size), and a CRC bit equivalent portion is specified.
- payload size payload size
- downlink unit bands other than the basic unit band include only downlink resource allocation information. Therefore, the PDCCH receiving unit 207 specifies the CRC bit equivalent part in the downlink unit bands other than the basic unit band using the reference information size determined from the bandwidth of the downlink unit band.
- one upstream unit band UB1 and three downstream unit bands DB1 to DB3 are associated with each other.
- the magnitude relationship of the bandwidth of each unit band in FIG. 4 is as follows.
- the bandwidth of the downlink unit bands DB1 and DB3 is wider than the bandwidth of the uplink unit band UB1.
- the bandwidth of the downlink unit band DB2 is narrower than the bandwidth of the uplink unit band UB1.
- the bandwidth of the downlink unit band DB1 is wider than the bandwidth of the downlink unit band DB3.
- the bandwidth of the downlink unit band DB3 is closer to the bandwidth of the uplink unit band UB1 than the bandwidth of the downlink unit band DB2. That is, here, the downlink unit band DB3 is the basic unit band.
- the base station 100 allocates the uplink unit band UB1 to the terminal 200 as an uplink resource and allocates downlink unit bands DB1 to DB3 as downlink resources.
- the base station 100 includes the uplink resource allocation information and the downlink resource allocation information in the PDCCH signal and transmits to the terminal 200.
- base station 100 does not include uplink resource allocation information in all PDCCH signals, but includes uplink resource allocation information only in PDCCH signals arranged in some downlink unit bands.
- downlink resource allocation information is included in all PDCCH signals.
- the basic unit band is a downstream unit band having a bandwidth closest to the upstream unit band. Therefore, in FIG. 4, the uplink resource allocation information is transmitted only in the downlink unit band DB3 of the basic unit band.
- an arrow from PDCCH to uplink data (UL Data) means that uplink resource allocation information is transmitted on the PDCCH.
- an arrow from PDCCH to downlink data (DL Data) or D-BCH means that downlink resource allocation information is transmitted on the PDCCH.
- a CRC bit is added to the PDCCH signal in the padding section 103.
- the CRC bits are masked by the terminal ID assigned to the terminal 200.
- the information size is adjusted as necessary.
- the adjustment of the information size is performed in the padding section 103 for the PDCCH signal including both the uplink resource allocation information and the downlink resource allocation information (that is, the basic unit band PDCCH signal).
- the padding section 103 zero information is added to the smaller information size until the information sizes of the downlink resource allocation information and the uplink resource allocation information become equal.
- the thickness of each arrow indicates the information size of the corresponding resource allocation information, and the information size of the uplink resource allocation information in the basic unit band is equal to the information size of the downlink resource allocation information. Yes.
- PDCCH receiving section 207 has information size of resource allocation information determined from the bandwidth of each downlink unit band, and resource allocation information determined from the bandwidth of uplink unit band. A blind determination is performed on the PDCCH signal of each downlink unit band using the information size and the terminal ID of the own device.
- the PDCCH receiving unit 207 first determines a reference information size used for processing for each PDCCH signal, and specifies a CRC bit equivalent part included in the PDCCH signal according to the determined reference information size.
- the information size of the downlink resource allocation information determined from the bandwidth of the downlink unit band DB3 and the bandwidth of the uplink unit band UB1 corresponding thereto The larger one of the information sizes of the uplink resource allocation information determined from the reference information size (payload size: Payload size) is used, and the CRC bit equivalent part is specified.
- PDCCH receiving unit 207 specifies a CRC bit equivalent part using a reference information size determined from the bandwidth of the downlink unit band. In this way, the blind determination processing is switched in the basic unit band and the downlink unit bands other than the basic unit band.
- the PDCCH receiving unit 207 demasks the specified CRC bit equivalent part with its own terminal ID, if the CRC calculation result for the entire PDCCH signal is OK, the PDCCH signal is transmitted to the own machine. It is determined that the received PDCCH signal.
- format determination section 208 determines whether the format of the PDCCH signal is format 0 or format 1A based on the resource allocation information type information included in the PDCCH signal received from PDCCH reception section 207.
- the PDCCH signal including the uplink resource allocation information is limited to those arranged in a part of the downlink unit bands.
- the probability that zero padding is performed for resource allocation information can be reduced.
- the basic unit band is a downlink unit band having a bandwidth closest to the bandwidth of the uplink unit band
- the downlink unit band that is zero-padded to the downlink resource allocation information is at most basic. It can be limited to one unit band.
- the PDCCH signal of the downlink unit band other than the basic unit band includes only the downlink resource allocation information. Therefore, the probability that zero padding is performed on downlink resource allocation information can also be reduced. Similarly, regarding the uplink resource allocation information, the number of paddings and the padding frequency can be minimized.
- Embodiment 3 This embodiment is different from Embodiments 1 and 2 in that the base station variably sets the basic unit band for each terminal.
- the base station when the base station starts high-speed communication by carrier aggregation for a certain terminal, the basic unit band is set according to the same criteria as in the first or second embodiment.
- the base station can instruct the terminal to add or change the basic unit band at any time.
- FIG. 5 is a block diagram showing a configuration of base station 300 according to Embodiment 3 of the present invention.
- a base station 300 illustrated in FIG. 5 includes a control unit 301 instead of the control unit 101, a padding unit 303 instead of the padding unit 103, and a modulation unit 105, as compared with the base station 100 illustrated in FIG. Instead of this, a modulation unit 305 is provided.
- FIG. 5 parts having the same configuration as in FIG.
- the control unit 301 of the base station 300 holds basic unit band information set by the base station 300 for each terminal 400. However, a plurality of basic unit bands may be set for one terminal 400.
- the control unit 301 also includes basic unit band setting information set for each terminal 300, the size of downlink resource allocation information determined from the bandwidth of the basic unit band in each basic unit band, and the bandwidth of the upstream unit band.
- the “information size comparison information” indicating the size of the uplink resource allocation information determined from the above is passed to the padding section 303 via the PDCCH generation section 102.
- control unit 301 when changing the basic unit band setting information for the terminal 400, the control unit 301 sends new “basic unit band setting information” to the modulation unit 305 in order to transmit the information as data to the terminal 400. Output.
- the padding section 303 adds zero information to the smaller information size until the information sizes of the downlink resource allocation information and the uplink resource allocation information become equal in the input PDCCH signal. Whether to add zero information to downlink resource allocation information or uplink resource allocation information is determined based on information size comparison information.
- the resource allocation information to which zero information is added as necessary is output to modulation section 104.
- the modulation unit 305 When the modulation unit 305 receives basic unit band setting information for the terminal 300 from the control unit 301, the modulation unit 305 modulates the information as part of transmission data for the terminal 300 and outputs the modulated information to the multiplexing unit 107.
- FIG. 6 is a block diagram showing a configuration of terminal 400 according to Embodiment 3 of the present invention. 6 has a PDCCH receiving unit 407 instead of PDCCH receiving unit 207 and a PDSCH receiving unit instead of PDSCH receiving unit 209, as compared with terminal 200 according to Embodiment 1 shown in FIG. 409. 6, parts having the same configuration as in FIG. 3 are denoted by the same reference numerals and description thereof is omitted.
- PDCCH receiving section 407 of terminal 400 includes information size of resource allocation information corresponding to the bandwidth of each downlink unit band, information size of resource allocation information corresponding to the bandwidth of uplink unit band, and Blind determination is performed on the PDCCH signal of each downlink unit band using its own terminal ID.
- the PDCCH receiving unit 407 first determines a reference information size used for processing for each PDCCH signal, and specifies a CRC bit equivalent part included in the PDCCH signal according to the determined reference information size. At this time, as described above, the base station 300 may adjust the information size by zero padding. Therefore, for the PDCCH signal in each basic unit band, the PDCCH receiving unit 407 determines the size of the downlink resource allocation information determined from the bandwidth of each basic unit band and the bandwidth of the corresponding uplink unit band. The larger one of the determined sizes of uplink resource allocation information is set as a reference information size (payload size: Payload size), and a CRC bit equivalent part is specified.
- payload size payload size
- downlink unit bands other than the basic unit band include only downlink resource allocation information. Therefore, the PDCCH receiving unit 407 specifies the CRC bit equivalent portion in the downlink unit band other than the basic unit band, using the reference information size determined from the bandwidth of the downlink unit band.
- the PDCCH receiving unit 407 determines the plurality of basic unit bands based on the basic unit band setting information input from the PDSCH receiving unit 409.
- the PDSCH receiving unit 409 extracts received data from the PDSCH signal input from the demultiplexing unit 205 based on the downlink resource allocation information input from the format determining unit 208. In addition, when the information which notifies the change of a basic unit band setting is contained in received data, the PDSCH receiving part 409 outputs the information to the PDCCH receiving part 407 as new basic unit band setting information.
- FIG. 7 is a diagram illustrating a sequence when the base station 300 and the terminal 400 start carrier aggregation communication.
- the base station 300 periodically transmits information on the uplink unit band using a certain downlink unit band (downlink unit band 1 in FIG. 7) (Step 1). If the terminal 400 succeeds in receiving the uplink unit band information from the base station 300, the terminal 400 communicates with the base station 300 by requesting the base station 300 to start communication using the uplink unit band. Is started (Step 2). At this time, since only one downlink unit band and one uplink unit band are set in the terminal 400, the base station 300 and the terminal 400 basically use this one downlink unit band (downlink unit band 1 in FIG. 7). Set as unit band.
- the base station 300 After the communication between the base station 300 and the terminal 400 is established, when the base station 300 sets carrier aggregation communication between the two according to the state of communication traffic, the base station 300 The fact that the unit band 2 is used for communication with the terminal 400 is individually notified, and carrier aggregation communication is set between them (Step 3).
- the frequency position of the newly added unit band ie, the downlink unit band 2
- the frequency bandwidth ie, the frequency bandwidth
- the newly added unit band are defined as the basic unit band
- a plurality of information elements (Information element) such as information indicating whether to set are included.
- both two downlink unit bands used for carrier aggregation are associated with one uplink unit band.
- FIG. 8 is a conceptual diagram of the operation in the newly added downlink unit band described above.
- the bandwidth of the downlink unit band 1 used for communication from the beginning is 15 MHz
- the bandwidth of the newly added downlink unit band 2 is 10 MHz, both of which are the bandwidth of the upstream unit band 1 (20 MHz). ) Is smaller than.
- the downlink unit band 1 is a basic unit band for the terminal 400 regardless of the magnitude relationship with the bandwidth of the uplink unit band.
- Step 3 in FIG. 8 when carrier aggregation communication is started between base station 300 and terminal 400 (Step 3 in FIG. 8), whether or not a newly added downlink unit band is set as a basic unit band. Is determined based on whether or not the basic unit band setting information is included in the information element included in the individual notification from the base station 300. That is, the flow for adding the downlink unit band and the flow using the added downlink unit band as the basic unit band are different flows.
- the newly added downlink The unit band is unconditionally set as the basic unit band.
- the terminal 400 sets the newly added downlink unit band as the basic unit band, and if the latter is larger, the newly added downlink unit band Do not set the band as the basic unit band. In FIG. 8, since the latter is larger, the newly added downlink unit band is not set as the basic unit band.
- the base station 300 determines whether to transmit Format 0 from the new downlink unit band to the terminal 400 as a default setting. Also, based on the result of the comparison described above, PDCCH reception section 407 of terminal 400 determines the size of downlink resource allocation information.
- the base station 300 thereafter sets the basic unit band according to the situation. Whether or not the downlink unit band 2 is set as the basic unit band for the terminal 400 can be changed by individually notifying the terminal of information elements including information.
- base station 300 matches the size of Format 1A in downlink unit band 2 with the size of Format 0 by padding, as shown in FIG.
- the PDCCH receiving unit 407 of the terminal 400 determines that the format 1A size in the downlink unit band 2 is the size of the format 0 due to padding. Under the assumption that they are equal, the size of the downlink resource allocation information is determined.
- the default setting of whether or not to set the newly added downlink unit band as the basic unit band at the start of carrier aggregation is the bandwidth of the newly added downlink unit band. Stipulated by the size of the size of the downlink resource allocation information determined from the above and the size of the uplink resource allocation information determined from the uplink bandwidth, so that the operation preferable for the performance of Format1A while reducing the overhead for signaling Can be realized. Furthermore, the base station 300 can arbitrarily change the setting of the basic unit band for each terminal 400 according to the information of communication traffic.
- the control unit 301 sets the downlink unit band newly added at the start of carrier aggregation, and the information size determined from the bandwidth of the downlink unit band is the downlink unit band. Only when the information size is larger than the information size determined from the bandwidth of the associated uplink unit band, the downlink unit band is set as the basic unit band. In other words, among the downlink unit bands that the control unit 301 adds as a communication unit band in addition to the initial communication unit band, when adding a communication unit band, the default operation is based on the bandwidth of the downlink unit band. Only the information size determined to be equal to or larger than the information size determined from the bandwidth of the uplink unit band associated with the downlink unit band is set as the basic unit band. By doing so, it is possible to prevent the downlink resource allocation information from being padded without signaling to the terminal in the newly added downlink unit band.
- a downlink unit band that satisfies the following conditions may be selected as the basic unit band. That is, first, a downlink unit band having a bandwidth equal to or greater than the bandwidth of the uplink unit band may be selected as the basic unit band. By doing so, it is possible to eliminate the zero padding due to the bandwidth relationship with the downlink resource allocation information. Second, a downlink unit band having a bandwidth that is equal to or larger than the bandwidth of the uplink unit band and closest to the bandwidth of the uplink unit band may be selected as the basic unit band. This also eliminates zero padding for downlink resource allocation information due to the bandwidth relationship.
- the LTE-A base station needs to support both LTE terminals and LTE-A terminals.
- the LTE terminal can communicate with only one unit band at the same time as described above.
- an LTE terminal communicates with the base station 100, naturally, uplink resource allocation information and downlink resource allocation information are required. Therefore, LTE terminals cannot be allocated to downlink unit bands other than the basic unit band, in which only downlink resource allocation information is transmitted, and LTE terminals can be allocated only to the basic unit band. Therefore, when base station 100 according to Embodiments 1 and 2 is an LTE-A base station, the basic unit band may be a coexistence band of the LTE-A terminal and the LTE terminal.
- LTE terminal SCH and P-BCH are transmitted as shown in FIG.
- the LTE terminal SCH and P-BCH are also used by the LTE-A terminal.
- terminal 200 determines whether or not LTE terminal SCH and P-BCH can be received in a certain downlink unit band. It can be determined whether or not the band is a basic unit band. Based on the determination result, the terminal 200 can switch the blind determination process for the basic unit band and the other downlink unit bands as described above.
- the basic unit band may be specified based on the information on the coexistence band. Moreover, the information regarding a coexistence band may be notified not only to alerting
- each functional block used in the description of the above embodiment is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
- the name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- the wireless terminal device, the wireless base station device, and the channel signal forming method of the present invention when communicating using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band, By reducing the frequency of the zero information addition processing, it is useful as a device that can prevent quality degradation of downlink resource allocation information.
Abstract
Description
図2は、本発明の実施の形態1に係る基地局100の構成を示すブロック図である。図2において、基地局100は、制御部101と、PDCCH生成部102と、パディング部103と、変調部104,105と、SCH/BCH生成部106と、多重部107と、IFFT部108と、CP付加部109と、送信RF部110と、受信RF部111と、CP除去部112と、FFT部113と、抽出部114と、IDFT部115と、データ受信部116とを有する。基地局100は、上り単位バンド及び上り単位バンドと対応づけられた複数の下り単位バンドを使用して通信可能に構成されている。
上り単位バンドの帯域幅と下り単位バンドの帯域幅とが同一である場合でも、下りリソース割当情報及び上りリソース割当情報の情報サイズが互いに異なる場合があり、本実施の形態は、この点に着目している点においてのみ実施の形態1と相違する。
本実施の形態は、基地局が端末毎に基本単位バンドを可変に設定する点において、実施の形態1及び2と相違する。
(1)実施の形態1及び2において、基本単位バンドとして、次の条件を満たす下り単位バンドを選択しても良い。すなわち、第1に、上り単位バンドの帯域幅以上の帯域幅を有する下り単位バンドを、基本単位バンドとして選択しても良い。こうすることで、下りリソース割当情報に対する帯域幅の大小関係に起因するゼロパディングを無くすことができる。また、第2に、上り単位バンドの帯域幅以上で、且つ、上り単位バンドの帯域幅に最も近い帯域幅を有する下り単位バンドを基本単位バンドとして選択しても良い。こうすることでも、帯域幅の大小関係に起因する下りリソース割当情報に対するゼロパディングを無くすことができる。
Claims (7)
- 上り単位バンド及び前記上り単位バンドと対応づけられた複数の下り単位バンドを使用して通信可能な無線通信端末装置であって、
下り単位バンドごとに割当情報を含む制御信号を受信する無線受信手段と、
各下り単位バンドの制御信号について受信処理に用いる基準情報サイズを決定し、前記基準情報サイズに基づいて制御信号を受信処理する手段であって、前記複数の下り単位バンドの内、上り割当情報及び下り割当情報を含む一部の下り単位バンドでは、対応下り単位バンドの帯域幅から決定される情報サイズが前記上り単位バンドの帯域幅から決定される情報サイズよりも大きい場合、前記基準情報サイズを下り単位バンドの帯域幅から決定される情報サイズとし、対応下り単位バンドの帯域幅から決定される情報サイズが前記上り単位バンドの帯域幅から決定される情報サイズよりも小さい場合、前記基準情報サイズを上り単位バンドの帯域幅から決定される情報サイズとし、残りの下り単位バンドでは、前記基準情報サイズを上り単位バンドの帯域幅に関わらず下り単位バンドの帯域幅から決定される情報サイズとする、制御信号受信処理手段と、
を具備する無線端末装置。 - 前記一部の下り単位バンドは、帯域幅が前記上り単位バンドの帯域幅以上である下り単位バンドの中で、前記上り単位バンドの帯域幅に最も近い下り単位バンドである、請求項1記載の無線端末装置。
- 上り単位バンド及び前記上り単位バンドと対応づけられた複数の下り単位バンドを使用して通信可能な無線通信基地局装置であって、
下り単位バンドごとにチャネル信号を形成する形成手段と、
下り割当情報及び上り割当情報の両方を含むチャネル信号において下り割当情報及び上り割当情報の情報サイズが等しくなるまで情報サイズの小さい方にゼロ情報を付加するパディング手段と、
を具備し、
前記形成手段は、前記形成された複数のチャネル信号の内の一部にのみ上り割当情報及び下り割当情報の両方を含め、前記一部以外のチャネル信号には下り割当情報のみを含める、無線基地局装置。 - 前記一部の下り単位バンドは、前記上り単位バンドの帯域幅以上の帯域幅を有する下り単位バンドである、請求項3に記載の無線基地局装置。
- 前記一部の下り単位バンドは、前記上り単位バンドの帯域幅以上で、且つ、前記上り単位バンドの帯域幅に最も近い帯域幅を有する下り単位バンドである、請求項3に記載の無線基地局装置。
- 初期通信単位バンドの他に、他の下り単位バンドを通信バンドとして追加する手段であって、通信バンドの追加時には、前記他の下り単位バンドの帯域幅から決定される情報サイズが前記他の下り単位バンドと対応づけられた上り単位バンドの帯域幅から決定される情報サイズ以上である場合にのみ、前記形成手段にて前記他の下り単位バンドのチャネル信号に下り割当情報及び上り割当情報の両方を含ませる制御手段、をさらに具備する請求項3に記載の無線基地局装置。
- 上り単位バンドと対応づけられた複数の下り単位バンドのそれぞれに、下り割当情報を含むチャネル信号を形成するチャネル信号形成方法であって、
一部のチャネル信号にのみ前記上り単位バンドの上り割当情報を含め、
下り割当情報及び上り割当情報の両方を含むチャネル信号において下り割当情報及び上り割当情報の情報サイズが等しくなるまで情報サイズの小さい方にゼロ情報を付加する、
チャネル信号形成方法。
Priority Applications (11)
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US13/125,422 US8743805B2 (en) | 2008-10-31 | 2009-10-30 | Radio terminal device, radio base station device, and channel signal forming method |
JP2010535684A JP5383697B2 (ja) | 2008-10-31 | 2009-10-30 | 基地局装置、端末装置、通信方法、および、集積回路 |
CN200980143103.0A CN102204323B (zh) | 2008-10-31 | 2009-10-30 | 无线终端装置、无线基站装置以及信道信号形成方法 |
EP16203213.0A EP3157285B1 (en) | 2008-10-31 | 2009-10-30 | Communication apparatus and method |
EP09823345.5A EP2352330B1 (en) | 2008-10-31 | 2009-10-30 | Radio terminal apparatus, radio base station apparatus, and control signal forming method |
US14/012,856 US8817819B2 (en) | 2008-10-31 | 2013-08-28 | Base station apparatus, communication method, terminal apparatus and integrated circuit |
US14/334,499 US9240873B2 (en) | 2008-10-31 | 2014-07-17 | Base station apparatus, communication method, terminal apparatus and integrated circuit |
US14/966,278 US9999036B2 (en) | 2008-10-31 | 2015-12-11 | Base station apparatus, communication method, terminal apparatus and integrated circuit |
US15/975,409 US10631282B2 (en) | 2008-10-31 | 2018-05-09 | Base station apparatus, communication method, terminal apparatus and integrated circuit |
US16/802,968 US11051294B2 (en) | 2008-10-31 | 2020-02-27 | Communication apparatus and communication method |
US17/332,659 US20210289483A1 (en) | 2008-10-31 | 2021-05-27 | Communication apparatus and communication method |
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CN103491574B (zh) | 2016-08-17 |
EP2352330A1 (en) | 2011-08-03 |
US8817819B2 (en) | 2014-08-26 |
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JPWO2010050232A1 (ja) | 2012-03-29 |
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EP3157285A1 (en) | 2017-04-19 |
US20200196292A1 (en) | 2020-06-18 |
US20160128035A1 (en) | 2016-05-05 |
CN102204323A (zh) | 2011-09-28 |
JP5383697B2 (ja) | 2014-01-08 |
EP2667657B1 (en) | 2015-09-30 |
US20140328282A1 (en) | 2014-11-06 |
CN103491574A (zh) | 2014-01-01 |
CN103402228B (zh) | 2016-08-10 |
US8743805B2 (en) | 2014-06-03 |
US20210289483A1 (en) | 2021-09-16 |
US20110199999A1 (en) | 2011-08-18 |
US10631282B2 (en) | 2020-04-21 |
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US20140010191A1 (en) | 2014-01-09 |
EP2667657A3 (en) | 2014-02-19 |
CN103402228A (zh) | 2013-11-20 |
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US20180263023A1 (en) | 2018-09-13 |
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