WO2010109513A1 - 無線通信システム、基地局装置、端末装置、及び無線通信システムにおける無線通信方法 - Google Patents
無線通信システム、基地局装置、端末装置、及び無線通信システムにおける無線通信方法 Download PDFInfo
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- WO2010109513A1 WO2010109513A1 PCT/JP2009/001263 JP2009001263W WO2010109513A1 WO 2010109513 A1 WO2010109513 A1 WO 2010109513A1 JP 2009001263 W JP2009001263 W JP 2009001263W WO 2010109513 A1 WO2010109513 A1 WO 2010109513A1
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- 238000000034 method Methods 0.000 title claims description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 69
- 238000010586 diagram Methods 0.000 description 23
- 238000011156 evaluation Methods 0.000 description 11
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 9
- 238000012545 processing Methods 0.000 description 8
- 239000000284 extract Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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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
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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
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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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 wireless communication system, a base station device, a terminal device, and a wireless communication method in a wireless system.
- LTE Long Term Term Evolution
- 3GPP Third Generation Partnership Project
- the transmission bandwidth is divided into subbands having the same width (for example, Non-Patent Document 1 below).
- User data for each terminal device is transmitted using one or a plurality of subbands.
- these subbands are arranged continuously or discontinuously on the frequency axis.
- FIG. 10A shows an example of a subframe configuration
- FIG. 10B shows an example of a bitmap.
- These figures are diagrams showing an example in which the total number of subbands is 10, and the third and fourth subbands (“Y” in FIG. 10A) are used in order from the left for a certain terminal device. is there.
- the bitmap is included in the control signal, and the resource is allocated to the control channel region of the subframe (for example, “X” in FIG. 10A).
- FIG. 11A and FIG. 11B are diagrams showing the relationship between the radio transmission bandwidth and the subband.
- the wireless transmission bandwidth becomes wider as compared with the case shown in FIG. 3A, the number of all subbands increases.
- the bit map length increases, and the amount of control signal information increases as compared to the case shown in FIG.
- FIGS. 12A to 12C are diagrams illustrating an example in which the bandwidth of each subband increases as the wireless transmission bandwidth increases while the bitmap length remains constant. 3GPP TS36.213V8.3.0
- the size of user data varies in size, and when the amount of user data transmitted by the base station device or terminal device is sufficiently small compared to the size of the subband, the utilization efficiency of the subband decreases.
- one of the objects of the present invention is to provide a radio communication system, a base station apparatus, a terminal apparatus, and a radio communication method in the radio communication system that improve the subband utilization efficiency.
- Another object of the present invention is to provide a wireless communication system or the like that prevents an increase in the amount of information of allocation information indicating which terminal device uses which subband.
- the base station device uses a first and second radio frequency bands used for the wireless communication that have different bandwidths. And the divided first or second subband is allocated for transmission of user data to the terminal apparatus or transmission of the user data from the terminal apparatus, and for each terminal apparatus
- a scheduling unit that generates allocation information indicating which first or second subband is allocated; and a transmission unit that transmits the allocation information to the terminal device, wherein the terminal device receives the allocation information.
- a receiving unit A receiving unit.
- the radio frequency band used for the radio communication is divided into first and second subbands having different bandwidths, and is divided
- the first or second subband is allocated for transmission of user data to the terminal apparatus or transmission of the user data from the terminal apparatus, and which first or second subband is assigned to each terminal apparatus
- a scheduling unit that generates allocation information indicating whether the allocation has been allocated, and a transmission unit that transmits the allocation information to the terminal device.
- a radio frequency band used for the radio communication is divided into first and second subbands having different bandwidths, and divided.
- the first or second subband is allocated for transmission of user data to the terminal device or transmission of the user data from the terminal device, and which first or second subband is assigned to each terminal device.
- a receiving unit configured to receive allocation information indicating whether a band has been allocated from the base station apparatus;
- a radio communication method in a radio communication system that performs radio communication between a base station apparatus and a terminal apparatus, wherein the base station apparatus sets a radio frequency band used for the radio communication.
- the first and second subbands having different bandwidths are divided, and the divided first or second subbands are transmitted to the terminal device or transmitted from the terminal device.
- radio communication system It is possible to provide a radio communication system, a base station apparatus, a terminal apparatus, and a radio communication method in the radio communication system that improve the subband usage efficiency.
- a wireless communication system or the like that prevents an increase in the amount of information of allocation information indicating which terminal device uses which subband.
- FIG. 1 is a diagram illustrating a configuration example of a wireless communication system.
- FIG. 2 is a diagram illustrating a configuration example of the base station apparatus.
- FIG. 3 is a diagram illustrating a configuration example of the terminal device.
- FIG. 4 is a flowchart showing an operation example.
- FIG. 5 is a diagram illustrating a configuration example of a subframe.
- FIG. 6 is a diagram illustrating another configuration example of the subframe.
- FIG. 7 is a diagram illustrating another configuration example of the base station apparatus.
- FIG. 8 is a diagram illustrating another configuration example of the terminal device.
- FIG. 9 is a diagram illustrating another configuration example of the terminal device.
- FIG. 10A shows an example of a subframe configuration
- FIG. 10B shows an example of a bitmap.
- FIG. 11A and FIG. 11B are diagrams illustrating an example of a relationship between a wireless transmission bandwidth and a subband.
- FIGS. 12A to 12C are diagrams showing other
- wireless communication system 10 base station apparatus 11: subband bitmap definition information storage unit 12: scheduling unit 13: first multiplexing unit 14: second multiplexing unit 15: third multiplexing unit 17: Radio transmission unit 18: Radio reception unit 19: Movement speed estimation unit 20: Data decoding unit 21: Transmission unit 30: Terminal device 31: Radio reception unit 32: Control signal decoding unit 33: Data decoding unit 34: Channel estimation unit (or moving speed estimation unit) 35: Evaluation unit 36: Bitmap definition desired signal generation unit 37: Fourth multiplexing unit 38: Fifth multiplexing unit 39: Radio transmission unit 40: Movement speed estimation unit 41: Terminal capability information storage unit 42: Reception Part
- FIG. 1 is a diagram illustrating a configuration example of a wireless communication system 1.
- the base station apparatus 10 divides a radio frequency band used for radio communication into first and second subbands having different bandwidths.
- the divided first or second subband is allocated for transmission of user data to the terminal device 30 or transmission of user data from the terminal device 30, and which first or second subband is assigned to each terminal device 30.
- the terminal device 30 includes a reception unit 42 that receives the allocation information.
- the scheduling unit 12 of the base station apparatus 10 transmits user data to the terminal apparatus 30 for each subband obtained by dividing the radio frequency band into first and second subbands having different bandwidths, or a user from the terminal apparatus 30. Assign for sending data. And the scheduling part 12 produces
- the terminal device 30 receives the allocation information transmitted from the base station device 10.
- the wireless communication system 1 of the present embodiment can improve the subband utilization efficiency.
- the wireless communication system 1 of the present embodiment can prevent an increase in the amount of allocation information.
- FIG. 2 is a diagram illustrating a configuration example of a base station apparatus (hereinafter referred to as a base station) 10 in the wireless communication system 1.
- the base station 10 includes a subband bitmap definition information storage unit (hereinafter, definition information storage unit) 11, a scheduling unit 12, a first multiplexing unit 13, a second multiplexing unit 14, A multiplexing unit 15, a modulation unit 16, a wireless transmission unit 17, a wireless reception unit 18, a moving speed estimation unit 19, and a data decoding unit 20 are provided.
- definition information storage unit hereinafter, definition information storage unit
- a multiplexing unit 15 a modulation unit 16, a wireless transmission unit 17, a wireless reception unit 18, a moving speed estimation unit 19, and a data decoding unit 20 are provided.
- the transmission unit 21 (see FIG. 1) in the first embodiment corresponds to, for example, the first to third multiplexing units 13 to 15, the modulation unit 16, and the wireless transmission unit 17.
- the definition information storage unit 11 stores subband bitmap definition information (hereinafter, bitmap definition information).
- the bitmap definition information is, for example, information (or allocation information) indicating which subband among one or a plurality of subbands is used for transmitting or receiving user data for each terminal device 30.
- the subband indicates, for example, the minimum frequency band allocated for transmitting or receiving user data to a certain terminal 30 in the transmission bandwidth of the wireless communication system 1.
- a subband includes one or more subcarriers. Details of the bitmap definition information will be described later.
- the scheduling unit 12 generates a subframe (or scheduling information) indicating which frequency band is used to transmit or receive data or the like for each terminal device (hereinafter, “terminal”) 30, and performs third multiplexing.
- the subframe includes a subframe in the downlink direction for transmitting data and the like from the base station 10 to the terminal 30, and a subframe in the uplink direction for transmitting data and the like from the terminal 30 to the base station 10.
- the scheduling unit 12 generates a control signal for each terminal 30 and outputs the control signal to the first multiplexing unit 13.
- the control signal includes data modulation information, individual control signals including HARQ information, and bitmap definition information.
- the scheduling unit 12 relates to the bitmap definition information, and includes the bitmap definition information stored in the definition information storage unit 11 in the read control signal.
- the bitmap definition information may be multiplexed with the corresponding user data.
- the scheduling unit 12 outputs bitmap definition information to the second multiplexing unit 14, and the second multiplexing unit 14 multiplexes the bitmap definition information with user data.
- the first multiplexing unit 13 multiplexes each control signal output from the scheduling unit 12.
- the second multiplexing unit 14 multiplexes user data for each terminal 30.
- Each user data is transmitted from, for example, an upper device (or upper layer).
- the third multiplexing unit 15 multiplexes the subframe information from the scheduling unit 12, the control signal output from the first multiplexing unit 13, and the data output from the second multiplexing unit 14. Turn into.
- the modulation unit 16 modulates data output from the third multiplexing unit 15.
- the wireless transmission unit 17 performs processing such as allocating data output from the modulation unit 16 to a predetermined frequency band and time domain based on the information of the subframe, and converts the processed signal into a wireless signal And output.
- the radio signal is transmitted to the terminal 30 via the transmission antenna.
- the radio receiving unit 18 converts the radio signal received from the terminal 30 via the receiving antenna into a signal before modulation.
- the moving speed estimator 19 estimates the moving speed of the terminal 30 based on the signal output from the wireless receiver 18. For example, the moving speed estimation unit 19 estimates the moving speed based on the phase variation of the pilot signal transmitted from the terminal 30. The movement speed estimation unit 19 outputs the estimated movement speed information to the scheduling unit 12.
- the data decoding unit 20 decodes data from the signal output from the wireless reception unit 18.
- the data decoding unit 20 outputs a bitmap definition desired signal (hereinafter referred to as a bitmap desired signal) and the like transmitted from the terminal 30 to the scheduling unit 12 and outputs user data to the upper layer.
- the bitmap request signal is a signal transmitted from the terminal 30 when the terminal 30 wants to change the bitmap definition information transmitted to the terminal 30, for example. Details will be described later.
- FIG. 3 is a diagram illustrating a configuration example of the terminal 30.
- the terminal 30 includes a radio reception unit 31, a control signal decoding unit 32, a data decoding unit 33, a channel estimation unit 34, an evaluation unit 35, and a bitmap definition desired signal generation unit (hereinafter referred to as a desired signal generation unit) 36.
- the receiving unit 42 corresponds to, for example, the wireless receiving unit 31, the control signal decoding unit 32, and the data decoding unit 33.
- the radio reception unit 31 receives a radio signal transmitted from the base station 10 via a reception antenna.
- the control signal decoding unit 32 decodes the control signal with respect to the signal from the wireless reception unit 31.
- the control signal decoding unit 32 outputs subband information indicating which subband is assigned to the terminal 30 to the data decoding unit 33 based on the bitmap definition information included in the control signal.
- the control signal decoding unit 32 outputs the modulation method and coding rate information included in the control signal to the data decoding unit 33.
- the data decoding unit 33 Based on the subband information, the data decoding unit 33 extracts user data addressed to the terminal 30 from the signal from the radio reception unit 31, and demodulates and decodes the user data based on the modulation information and the coding rate information, respectively. .
- the decrypted user data is output to another processing unit of the terminal 30.
- the data decoding unit 33 may extract the bitmap definition information from the decoded user data and output it to the control signal decoding unit 32.
- the control signal decoding unit 32 outputs subband information based on the bitmap definition information output from the data decoding unit 33.
- the channel estimation unit 34 performs channel estimation and downlink radio channel quality measurement necessary for demodulating the received signal based on the pilot signal transmitted from the base station 10.
- the evaluation unit 35 determines whether or not to change the bitmap definition information based on the result of the downlink radio channel quality measurement, and outputs a notification to that effect to the desired signal generation unit 36 if it is changed. For example, the evaluation unit 35 notifies that the change is made when the estimation result is lower than the threshold value.
- the desired signal generating unit 36 When receiving the notification of the change from the evaluation unit 35, the desired signal generating unit 36 generates a bitmap definition desired signal for requesting the change of the bitmap definition information.
- the fourth multiplexing unit 37 multiplexes the user data and the bitmap definition desired signal output from the desired signal generation unit 36.
- the fifth multiplexing unit 38 multiplexes the control signal and the output signal output from the fourth multiplexing unit 37.
- the radio transmission unit 39 performs processing such as encoding, amplitude control, and modulation on the output signal output from the fifth multiplexing unit 38, converts the processed signal into a radio signal, and outputs the radio signal to the transmission antenna. To do.
- the radio signal is transmitted to the base station 10 via the transmission antenna.
- FIG. 4 is a flowchart showing an operation example.
- the scheduling unit 12 of the base station 10 When the processing is started, the scheduling unit 12 of the base station 10 generates the control signal by including the initial (default) bitmap definition information stored in the definition information storage unit 11 in the control signal (S10).
- the scheduling unit 12 may output the bitmap definition information to the second multiplexing unit 14 and multiplex it with user data.
- FIG. 5A is a diagram illustrating an example of a subframe configuration
- FIG. 5B is a diagram illustrating an example of bitmap definition information.
- the width of each subband allocated to the terminal 30 is made different.
- the example shown in FIG. 2A is an example in which two types of large and small subbands are mixed in the wireless transmission band.
- Each bit included in the bitmap information corresponds to each subband.
- the bitmap definition information is “100,000”, and the second subband from the left is assigned.
- the bitmap definition information is “010000”.
- the scheduling unit 12 creates bitmap definition information for each terminal 30.
- two types of large and small subbands are arranged.
- the widths of the subbands may all be different.
- the width of the subband indicated by each bit is set between the bits.
- the scheduling unit 12 generates allocation information indicating which subband is allocated for user data transmission for the terminal 30 with respect to the subband divided into different bandwidths in the radio transmission band. Yes.
- the subband utilization efficiency can be increased as compared with the case where a subband having a constant width is used. Further, even if the subband widths are different, the number of bits in the bitmap definition information is not changed unless the number of all subbands is changed. Therefore, in this embodiment, it is possible to prevent an increase in the amount of bitmap definition information and further improve the subband usage efficiency.
- the base station 10 notifies each terminal 30 of the created bitmap definition information (S11).
- the bitmap definition information is included in the control signal or multiplexed with user data and transmitted to each terminal 30 via the wireless transmission unit 17 or the like.
- the base station 10 determines whether or not the data amount is equal to or less than a threshold value (S12).
- the scheduling unit 12 may input user data input to the second multiplexing unit 14, calculate the user data amount per unit time, and determine from the data amount and the threshold value.
- the data decoding unit 33 of the terminal 30 calculates the decoded data amount per unit time and outputs it to the wireless transmission unit 39 or the like, and the scheduling unit 12 determines from the data amount transmitted from the terminal 30. Good.
- the scheduling unit 12 When the data amount is less than or equal to the threshold (YES in S12), the scheduling unit 12 changes the subband arrangement pattern (S13). For example, when the data amount of user data transmitted to a certain terminal 30 is very small with respect to the initially allocated subband size, the scheduling unit 12 changes the subband arrangement.
- the definition information storage unit 11 or the scheduling storage unit 12 stores a plurality of subframes or subband information whose subband arrangement has been changed.
- the scheduling unit 12 changes the bitmap definition information by reading subframe or subband information having a subband arrangement different from that of S10.
- the width of the subband indicated by each bit of the bitmap definition information is different between the bits, which is the same as the initial bitmap definition information set in S10.
- the scheduling unit 12 may change the arrangement of subbands by changing the number of all subbands of the radio transmission band.
- 6 (A) to 6 (D) are diagrams showing configuration examples of subframes having different subband arrangements.
- the scheduling unit 12 can use the subframe shown in FIG. 6A as the initial subband, and can use the subframe shown in FIG.
- the subband is compared with other subbands as shown in FIG. Changed to a smaller subband. Therefore, a subband having a width corresponding to the data amount is allocated, and the subband utilization efficiency can be improved.
- the subband arrangement is changed. By doing so (for example, FIG. 6C), it becomes possible to transmit data using subbands of different frequency bands, so that it is possible to prevent reception characteristic deterioration.
- the subband change is transmitted from the scheduling unit 12 to the terminal 30 via the third multiplexing unit 15 or the like as changed subframe information (or scheduling information).
- the data decoding unit 33 of the terminal 30 can decode user data or the like from the base station 10 based on the changed subband information.
- the scheduling unit 12 determines whether a bitmap definition request signal is received from the terminal 30 (S14). For example, the scheduling unit 12 determines whether or not a bitmap definition request signal is input from the data decoding unit 20.
- Scheduling unit 12 changes the subband arrangement pattern when receiving a bitmap definition request signal from terminal 30 (YES in S14) (S15).
- the change can be performed in the same manner as the process of S13.
- the bitmap definition desired signal is generated by the evaluation unit 35 and the bitmap definition desired signal generation unit 36 based on the result of the channel estimation unit 34. For example, when the downlink radio channel quality measurement result is smaller than the threshold value, the evaluation unit 35 has a poor propagation path environment, so that the subband width is wider than the initial subband width specified by the scheduling unit 12. Notify changes.
- the terminal 30 has a higher possibility that the width of the subband after the change is wider than the width of the initial subband by changing the arrangement pattern of the subbands. It becomes easier to apply a smaller value for the coding rate applied to the transmission signal, and therefore the probability that the terminal 30 can receive a reception signal with good reception characteristics is increased, and other reception signals are obtained by error correction or the like based on the reception signal. Can be decrypted. Therefore, the terminal 30 can improve reception characteristics.
- the scheduling unit 12 determines whether or not the moving speed of the terminal 30 is equal to or less than a threshold (S16). The scheduling unit 12 makes a determination based on the movement speed information output from the movement speed estimation unit 19.
- the scheduling unit 12 changes the bitmap definition information (S17).
- the change process is the same as S13 or S15.
- the change in the subband arrangement pattern increases the possibility that the changed subband width is wider than the initial subband width.
- the probability that a reception signal with good reception characteristics can be received increases. Therefore, the terminal 30 can decode other received signals by error correction or the like based on the received signals, and can improve the reception characteristics as compared with the case where a sub-band of a certain width is used. .
- FIG. 4 is a diagram illustrating an operation example in the uplink direction.
- the scheduling unit 12 reads the bitmap definition information from the definition information storage unit 11 and performs scheduling or the like (S10).
- the bitmap definition information is included in the control signal or multiplexed with user data and transmitted to the terminal 30.
- the bitmap definition information is for each subband in the radio transmission bandwidth in the uplink direction (or the subframe in the uplink direction).
- the control signal decoding unit 32 of the terminal 30 extracts subband information for the uplink direction from the bitmap definition information included in the control signal and the like, and also includes modulation method information and coding rate information in the uplink direction included in the control signal, etc. Are output to the wireless transmission unit 39, respectively.
- the wireless transmission unit 39 performs modulation and coding based on these pieces of information, and further maps and transmits user data and the like on the frequency axis and the time axis.
- the evaluation unit 35 requests a change of the bitmap definition information based on the output result from the channel estimation unit 34, and the desired signal generation unit 36 generates a bitmap definition desired signal based on the request.
- the bitmap definition request signal is multiplexed with user data and transmitted to the base station 10.
- the scheduling unit 12 of the base station 10 changes the bitmap definition, that is, the arrangement of the subbands depending on whether the amount of data per unit time in the uplink direction decoded by the data decoding unit 20 is equal to or less than the threshold (S12). Processing to change is performed (S13).
- the data amount may be the maximum data amount that can be transmitted by the terminal 30, as in the case of the downlink.
- the terminal 30 transmits information including the maximum data amount that can be transmitted in the control signal, and can be determined by the scheduling unit 12 of the base station 10.
- the scheduling unit 12 changes the subband arrangement (S15).
- the bitmap definition desired signal can also be implemented in the same manner as in the downlink, and the evaluation unit 35 notifies the generation of the desired signal based on the estimation result of the channel estimation unit 34, and the desired signal generation unit 36 generates the desired signal. And transmitted to the base station 10.
- the scheduling unit 12 changes the subband arrangement (S17). Similarly to the case of the downlink, the moving speed of the terminal 30 is estimated by the moving speed estimating unit 19 of the base station 10 and the scheduling unit 12 can determine the moving speed based on the estimation result.
- the subband arrangement change (S13, S15, and S17) can also be performed in the same manner as in the downlink direction.
- the changed subframe information is transmitted from the base station 10 to the terminal 30, and the control signal decoding unit 32 of the terminal 30 outputs the subband information to the wireless transmission unit 39 from the decoded control signal and the like.
- the wireless transmission unit 39 transmits user data and the like to the base station 10 using the changed subband.
- the subframe specified by the bitmap definition information (B0 B1 B2) is specified by the downlink direction and the bitmap definition information (B3 B4 B6).
- a subframe can also be represented as each subframe in the uplink direction.
- the width of the subband indicated by each bit is set between each bit.
- the scheduling unit 12 generates allocation information indicating which subband is allocated for user data transmission from the terminal 30 with respect to the subband divided into different bandwidths in the radio transmission band. Yes.
- the wireless communication system 1 can increase the subband utilization efficiency.
- the scheduling unit 12 can further improve the utilization efficiency of the subbands by changing the arrangement of the subbands having different sizes instead of being fixed. In any case, even if the subband arrangement is changed, if the number of all subbands is not changed, the number of bits of the bitmap definition information does not increase or decrease, and an increase in the amount of information of the bitmap definition information can be prevented.
- the scheduling unit 12 may periodically change the subhand arrangement pattern.
- the subband can be changed to a subband having a smaller width than the other subbands, thereby increasing the subband usage efficiency. Increases nature.
- the size of the subband indicated by each bit of the bitmap definition information is changed by changing the arrangement of the subbands, the number of bits is not changed and the amount of information is not changed.
- the scheduling unit 12 does not use four types of subframes as shown in FIGS. Two types may be used. Further, a plurality of types may be used.
- the scheduling unit 12 may change the cycle for changing the arrangement pattern from four types to three types. For example, when the moving speed of the terminal 30 is greater than the threshold value, the scheduling unit 12 selects three types from FIG. 6 (A) to FIG. 6 (D) to FIG. 6 (A) to FIG. Use to change.
- the scheduling unit 12 may change the subband arrangement so as to periodically change the number of all subbands in the transmission band.
- the scheduling unit 12 may change the number of all subbands when changing the bitmap definition information (S12, S14, or S16).
- FIG. 7 is a diagram showing another configuration example of the base station 10, and FIG. These drawings are diagrams illustrating an example in which the terminal 30 includes the moving speed estimation unit 40.
- the moving speed estimator 40 estimates the moving speed of the terminal 40 based on the phase variation of the pilot signal received by the wireless receiver 31. For example, like the moving speed estimating unit 19 of the base station 10, the moving speed estimating unit 40 sequentially stores the received pilot signals, stores the pilot signals for a certain period, and then calculates the phase fluctuations of the pilot signals. Is estimated.
- the estimated moving speed is transmitted to the base station 10 multiplexed with user data by the fourth multiplexing unit 37.
- the data decoding unit 20 of the base station 10 decodes the moving speed and outputs it to the scheduling unit 12.
- the scheduling unit 12 changes the subband arrangement pattern (S17).
- the scheduling unit 12 may periodically change the subband arrangement pattern (FIGS.
- the scheduling unit 12 may change the four types of subframes shown in FIGS. 6A to 6D to three types or two types of subframes according to the moving speed.
- the moving speed estimation unit 40 may output the estimated moving speed to the evaluation unit 35.
- the evaluation unit 35 notifies the bitmap definition desired signal generation unit 36 of the change of the bitmap definition information.
- the scheduling unit 12 changes the subband arrangement (S15). Since the moving speed estimation unit 19 is not present in the base station 10, the base station 10 can reduce processing.
- FIG. 9 is a diagram illustrating another configuration example of the terminal 30.
- the terminal 30 includes a terminal capability information storage unit 41 that stores the maximum size of receivable data (the maximum amount of data that can be received) as terminal capability information.
- the 4th multiplexing part 37 multiplexes user data etc. and terminal capability information, and outputs them.
- the data decoding unit 20 (FIG. 2) of the base station 10 decodes the terminal capability information and outputs it to the scheduling unit 12.
- the scheduling unit 12 performs a process of changing the subband arrangement (S13).
- the scheduling unit 12 since the scheduling unit 12 does not need to calculate the amount of user data to be transmitted per unit time, the base station 10 can reduce processing.
- the terminal 30 may output the terminal capability information to the fifth multiplexing unit 38 so as to be included in the control signal and transmitted.
- the arrangement pattern is changed based on the data amount, the bitmap definition request signal, and the moving speed of the terminal 30 (S12 to S17 in FIG. 4).
- the arrangement pattern may be changed according to the type of user data transmitted by the base station 10.
- the scheduling unit 12 inputs user data from a host device, and changes the arrangement pattern (S13, S15, S17) when the type of the user data is voice data, FTP (File Transfer Protocol), HTTP data, or the like. You can also For example, the scheduling unit 12 can determine from the type information of the user data included in the user data, or can be determined by receiving the type information of the user data from the host device. Also in this case, the various modifications described above can be applied. Even in this example, since the arrangement of subbands is changed according to the amount of user data, the utilization efficiency of subbands can be improved.
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Abstract
Description
3GPP TS36.213V8.3.0
11:サブバンドビットマップ定義情報記憶部
12:スケジューリング部 13:第1の多重化部
14:第2の多重化部 15:第3の多重化部
17:無線送信部 18:無線受信部
19:移動速度推定部 20:データ復号部
21:送信部 30:端末装置
31:無線受信部 32:制御信号復号部
33:データ復号部 34:チャネル推定部(または移動速度推定部)
35:評価部 36:ビットマップ定義希望信号生成部
37:第4の多重化部 38:第5の多重化部
39:無線送信部 40:移動速度推定部
41:端末能力情報記憶部 42:受信部
第1の実施例について説明する。図1は無線通信システム1の構成例を示す図である。基地局装置と端末装置との間で無線通信を行う無線通信システム1において、基地局装置10は、無線通信に用いられる無線周波数帯域を帯域幅の異なる第1及び第2のサブバンドに分割し、分割された第1または第2のサブバントを端末装置30へのユーザデータの送信または端末装置30からのユーザデータの送信のために割り当て、端末装置30ごとにどの第1または第2のサブバンドを割り当てたかを示す割り当て情報を生成するスケジューリング部12と、割り当て情報を端末装置30に送信する送信部21とを備え、端末装置30は、割り当て情報を受信する受信部42を備える。
図2は無線通信システム1における基地局装置(以下、基地局)10の構成例を示す図である。基地局10は、サブバンドビットマップ定義情報記憶部(以下、定義情報記憶部)11と、スケジューリング部12と、第1の多重化部13と、第2の多重化部14と、第3の多重化部15と、変調部16と、無線送信部17と、無線受信部18と、移動速度推定部19と、データ復号部20とを備える。
サブバンドの配置の変更は種々の変形例がある。例えば、S12,S14,及びS16の処理に関わらず、図6(A)~同図(D)に示すように、スケジューリング部12はサブハンドの配置パターンを周期的に異ならせるようにしてもよい。かかる変更により、例えば、ある端末30向けのユーザデータ量が他と比較して小さい場合に、他のサブバンドと比較して小さな幅のサブバンドに変更されて、サブバンドの利用効率を高める可能性が高くなる。サブバンドの配置の変更により、ビットマップ定義情報の各ビットが示すサブバンドの大きさが変更されるもののビット数は変更されず、情報量は変わらない。
Claims (13)
- 基地局装置と端末装置との間で無線通信を行う無線通信システムにおいて、
前記基地局装置は、
前記無線通信に用いられる無線周波数帯域を帯域幅の異なる第1及び第2のサブバンドに分割し、分割された前記第1または第2のサブバンドを前記端末装置へのユーザデータの送信または前記端末装置からの前記ユーザデータの送信のために割り当て、前記端末装置ごとにどの前記第1または第2のサブバンドを割り当てたかを示す割り当て情報を生成するスケジューリング部と、
前記割り当て情報を前記端末装置に送信する送信部とを備え、
前記端末装置は、
前記割り当て情報を受信する受信部を備えることを特徴とする無線通信システム。 - 前記スケジューリング部は、前記端末装置へのユーザデータのデータ量または前記端末装置からの前記ユーザデータのデータ量に基づいて、前記無線周波数帯域内における前記第1及び第2のサブバンドの配置を変更し、変更した前記第1または第2のサブバンドを前記ユーザデータの送信のために割り当てることを特徴とする請求項1記載の無線通信システム。
- 前記端末装置は、さらに、前記第1及び第2のサブバンドの配置の変更を要求する要求信号を生成し、当該要求信号を送信する送信部と、
前記基地局装置は、さらに、前記要求信号を受信する受信部とを備え、
前記スケジューリング部は、前記要求信号に応じて、前記無線周波数帯域内における前記第1及び第2のサブバンドの配置を変更し、変更した前記第1または第2のサブバンドを前記ユーザデータの送信のために割り当てることを特徴とする請求項1記載の無線通信システム。 - 前記端末装置は、さらに、前記基地局装置から送信されたパイロット信号に基づいてチャネル推定を行うチャネル推定部を備え、
前記端末装置の送信部は、前記チャネル推定部から出力された推定結果に基づいて前記要求信号を生成することを特徴とする請求項3記載の無線通信システム。 - 前記スケジューリング部は、前記端末装置の移動速度に基づいて、前記無線周波数帯域内における前記第1及び第2のサブバンドの配置を変更し、変更した前記第1または第2のサブバンドを前記ユーザデータの送信のために割り当てることを特徴とする請求項1記載の無線通信システム。
- 前記スケジューリング部は、前記無線周波数帯域内における前記第1及び第2のサブバンドの配置を単位送信区間ごとに変更し、変更した前記第1または前記第2のサブバンドを前記ユーザデータの送信のために割り当てることを特徴とする請求項1記載の無線通信システム。
- 前記スケジューリング部は、前記第1及び第2のサブバンドの配置を単位送信区間ごとにかつ一定周期で変更することを特徴とする請求項6記載の無線通信システム。
- 前記スケジューリング部は、前記端末装置の移動速度に応じて、前記第1及び第2のサブバンドの配置を変更する周期を変えることを特徴とする請求項7記載の無線通信システム。
- 前記スケジューリング部は、前記端末装置に送信するデータの種別または前記端末装置が送信するデータの種別に基づいて、前記無線周波数帯域内における前記第1及び第2のサブバンドの配置を変更し、変更した前記第1または第2のサブバンドを前記ユーザデータの送信のために割り当てることを特徴とする請求項1記載の無線通信システム。
- 前記スケジューリング部は、前記端末装置が受信できるまたは前記端末装置が送信できる前記ユーザデータの最大データ量に基づいて、前記無線周波数帯域内における前記第1及び第2のサブバンドの配置を変更し、変更した前記第1または第2のサブバンドを前記ユーザデータの送信のために割り当てることを特徴とする請求項1記載の無線通信システム。
- 端末装置と無線通信を行う基地局装置において、
前記無線通信に用いられる無線周波数帯域を帯域幅の異なる第1及び第2のサブバンドに分割し、分割された前記第1または第2のサブバンドを前記端末装置へのユーザデータの送信または前記端末装置からの前記ユーザデータの送信のために割り当て、前記端末装置ごとにどの前記第1または第2のサブバンドを割り当てたかを示す割り当て情報を生成するスケジューリング部と、
前記割り当て情報を前記端末装置に送信する送信部と、
を備えることを特徴とする基地局装置。 - 基地局装置と無線通信を行う端末装置において、
前記無線通信に用いられる無線周波数帯域が帯域幅の異なる第1及び第2のサブバンドに分割され、分割された前記第1または第2のサブバンドを前記端末装置へのユーザデータの送信または前記端末装置からの前記ユーザデータの送信のために割り当てられ、前記端末装置ごとにどの前記第1または第2のサブバンドが割り当てられたかを示す割り当て情報を前記基地局装置から受信する受信部
を備えることを特徴とする端末装置。 - 基地局装置と端末装置との間で無線通信を行う無線通信システムにおける無線通信方法であって、
前記基地局装置は、前記無線通信に用いられる無線周波数帯域を帯域幅の異なる第1及び第2のサブバンドに分割し、分割された前記第1または第2のサブバンドを前記端末装置へのユーザデータの送信または前記端末装置からの前記ユーザデータの送信のために割り当て、前記端末装置ごとにどの前記第1または第2のサブバンドを割り当てたかを示す割り当て情報を生成し、
前記基地局装置は、前記割り当て情報を前記端末装置に送信し、
前記端末装置は、前記割り当て情報を受信する、
ことを特徴とする無線通信方法。
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PCT/JP2009/001263 WO2010109513A1 (ja) | 2009-03-23 | 2009-03-23 | 無線通信システム、基地局装置、端末装置、及び無線通信システムにおける無線通信方法 |
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CN200980158252.4A CN102362537B (zh) | 2009-03-23 | 2009-03-23 | 无线通信系统、基站装置、终端装置以及无线通信系统中的无线通信方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR101678610B1 (ko) * | 2010-07-27 | 2016-11-23 | 삼성전자주식회사 | 롱텀 채널 정보를 기반으로 다중 노드 간 서브밴드 별 협력 통신을 수행하는 방법 및 장치 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002044002A (ja) * | 2000-07-21 | 2002-02-08 | Telecommunication Advancement Organization Of Japan | 通信方法 |
WO2005109787A1 (ja) * | 2004-05-10 | 2005-11-17 | Ntt Docomo, Inc. | パケット送信制御装置及びパケット送信制御方法 |
WO2007108473A1 (ja) * | 2006-03-20 | 2007-09-27 | Matsushita Electric Industrial Co., Ltd. | 無線通信システム、無線送信装置、および再送方法 |
WO2007119591A1 (ja) * | 2006-03-31 | 2007-10-25 | Matsushita Electric Industrial Co., Ltd. | 無線通信基地局装置および無線通信移動局装置 |
JP2007300505A (ja) * | 2006-05-01 | 2007-11-15 | Ntt Docomo Inc | 送信装置および受信装置並びにランダムアクセス制御方法 |
JP2008289114A (ja) * | 2007-02-02 | 2008-11-27 | Ntt Docomo Inc | 移動通信システム、基地局装置、ユーザ装置及び方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1751489B (zh) * | 2003-01-07 | 2010-06-16 | 高通股份有限公司 | 无线多载波通信系统的导频传输方案 |
WO2006138288A2 (en) * | 2005-06-13 | 2006-12-28 | Nokia Corporation | Flexible bandwidth communication system and method using a common physical layer technology platform |
US8538443B2 (en) * | 2006-03-20 | 2013-09-17 | Research In Motion Limited | Method and system for adjusting communication mode by adjusting the power level for a fractional frequency reuse in a wireless communication network |
KR101221821B1 (ko) * | 2006-04-21 | 2013-01-14 | 삼성전자주식회사 | 주파수 분할 다중 접속 시스템에서 자원 할당 정보 시그널링 방법 |
US8867453B2 (en) * | 2006-04-24 | 2014-10-21 | Samsung Electronics Co., Ltd. | System and method for subcarrier allocation signaling in a multicarrier wireless network |
EP2037694B1 (en) * | 2006-06-19 | 2014-01-15 | NTT DoCoMo, Inc. | Base station and scheduling method |
US10084627B2 (en) * | 2006-07-10 | 2018-09-25 | Qualcomm Incorporated | Frequency hopping in an SC-FDMA environment |
JP5046706B2 (ja) * | 2007-03-28 | 2012-10-10 | 日本無線株式会社 | 基地局装置 |
JP2008295032A (ja) * | 2007-04-27 | 2008-12-04 | Hitachi Communication Technologies Ltd | 無線通信システム、無線基地局、無線端末および無線通信システムにおける通信制御方法 |
US8160022B2 (en) | 2007-04-27 | 2012-04-17 | Hitachi, Ltd. | Wireless communication system, wireless base station, wireless terminal and communication control method of the wireless communication system |
CN101682917B (zh) * | 2007-06-18 | 2013-05-01 | 三菱电机株式会社 | 通信方法、无线通信系统、发送机以及接收机 |
US8239635B2 (en) * | 2009-09-30 | 2012-08-07 | Oracle America, Inc. | System and method for performing visible and semi-visible read operations in a software transactional memory |
-
2009
- 2009-03-23 EP EP09842131.6A patent/EP2413651A4/en not_active Withdrawn
- 2009-03-23 WO PCT/JP2009/001263 patent/WO2010109513A1/ja active Application Filing
- 2009-03-23 KR KR1020117022107A patent/KR101307630B1/ko not_active IP Right Cessation
- 2009-03-23 JP JP2011505645A patent/JP5278536B2/ja not_active Expired - Fee Related
- 2009-03-23 CN CN200980158252.4A patent/CN102362537B/zh not_active Expired - Fee Related
-
2011
- 2011-09-21 US US13/238,643 patent/US8712458B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002044002A (ja) * | 2000-07-21 | 2002-02-08 | Telecommunication Advancement Organization Of Japan | 通信方法 |
WO2005109787A1 (ja) * | 2004-05-10 | 2005-11-17 | Ntt Docomo, Inc. | パケット送信制御装置及びパケット送信制御方法 |
WO2007108473A1 (ja) * | 2006-03-20 | 2007-09-27 | Matsushita Electric Industrial Co., Ltd. | 無線通信システム、無線送信装置、および再送方法 |
WO2007119591A1 (ja) * | 2006-03-31 | 2007-10-25 | Matsushita Electric Industrial Co., Ltd. | 無線通信基地局装置および無線通信移動局装置 |
JP2007300505A (ja) * | 2006-05-01 | 2007-11-15 | Ntt Docomo Inc | 送信装置および受信装置並びにランダムアクセス制御方法 |
JP2008289114A (ja) * | 2007-02-02 | 2008-11-27 | Ntt Docomo Inc | 移動通信システム、基地局装置、ユーザ装置及び方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2413651A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019536343A (ja) * | 2016-11-01 | 2019-12-12 | エルジー エレクトロニクス インコーポレイティド | 無線通信システムにおいてnr搬送波のサブバンドアグリゲーションを構成する方法及び装置 |
US11317397B2 (en) | 2016-11-01 | 2022-04-26 | Lg Electronics Inc. | Method and apparatus for configuring subband aggregation in NR carrier in wireless communication system |
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US8712458B2 (en) | 2014-04-29 |
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