WO2008026662A1 - Procédé de communication sans fil et station de base sans fil - Google Patents
Procédé de communication sans fil et station de base sans fil Download PDFInfo
- Publication number
- WO2008026662A1 WO2008026662A1 PCT/JP2007/066813 JP2007066813W WO2008026662A1 WO 2008026662 A1 WO2008026662 A1 WO 2008026662A1 JP 2007066813 W JP2007066813 W JP 2007066813W WO 2008026662 A1 WO2008026662 A1 WO 2008026662A1
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- WO
- WIPO (PCT)
- Prior art keywords
- transmission power
- carrier
- power difference
- transmission
- base station
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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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
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
-
- 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
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
Definitions
- the present invention relates to a radio communication method in the uplink direction by a multicarrier using a plurality of carriers, and a radio base station connected to a radio communication terminal by the multicarrier.
- 3GPP2 3rd Generation Partnership Project 2
- Le multi-carrier
- a wireless communication terminal In the case of multi-carrier, a wireless communication terminal (Access Terminal) generally adopts a configuration in which a plurality of carriers are transmitted using the same wireless communication circuit from the viewpoints of downsizing and manufacturing cost reduction. . Therefore, in order to reduce interference between adjacent carriers with a predetermined frequency interval (1.25 MHz interval), the transmission power difference between adjacent carriers should be kept within a predetermined threshold (MaxRLTxPwrDiff, for example, 15 dB). (For example, Non-Patent Document 1).
- Non-Patent Document 1 "cdma2000 High Rate Packet Data Air Interface 3GPP2 C.S0024-B Version 1.0", 3GPP2, June 2006
- 3GPP2 stipulates that the transmission power difference between adjacent carriers be suppressed within a predetermined threshold (MaxRL TxPwrDiff). However, depending on the state of communication between the wireless communication terminal and the wireless base station (Access Network), it may not be possible to maintain the transmission power difference within a predetermined threshold! /.
- a wireless communication terminal moves away from a first wireless base station that performs communication using a first carrier and is adjacent to the first carrier with a predetermined frequency interval. If you are communicating with the second radio base station! /, The wireless communication terminal needs to increase the transmission power of the first carrier in order to maintain communication with the first wireless base station using the first carrier. Furthermore, the wireless communication terminal reduces the transmission power of the second carrier as it approaches the second wireless base station.
- the radio communication terminal maintains the transmission power difference within a predetermined threshold. May not be possible.
- An object of the present invention is to provide a wireless communication method and a wireless base station that can perform communication.
- One feature of the present invention is that the first carrier and a multicarrier using at least a second carrier adjacent to the first carrier having a predetermined frequency interval are used in the uplink direction.
- a wireless communication method of obtaining a transmission power value of the first carrier from a wireless communication terminal connected via the first carrier; and a wireless communication terminal connected via the second carrier Obtaining a transmission power value of the second carrier; calculating a transmission power difference between the transmission power value of the first carrier and the transmission power value of the second carrier; and Determining whether the difference exceeds a threshold set based on a maximum transmission power difference allowed between the first carrier and the second carrier; and Transmission power When a threshold set based on a force difference is exceeded, the first time frame used for transmitting uplink data using the first carrier and used for transmitting uplink data using the second carrier Assigning the second time frame so as not to overlap on the time axis, notifying the first time frame to the wireless communication terminal connected via the first carrier, And a step of notifying the second time frame to a wireless communication terminal
- the transmission power difference exceeds a threshold set based on the maximum transmission power difference
- the first time frame and the first time frame used for uplink data transmission using the first carrier The second time frame force used for uplink data transmission using the second carrier is assigned so as not to overlap on the time axis. [0010] Therefore, multi-carrier communication can be continued while suppressing interference between adjacent carriers having a predetermined frequency interval.
- One feature of the present invention is that, in the above-described feature of the present invention, in the step of calculating the transmission power difference, the transmission power difference is calculated at a predetermined period, and is calculated every predetermined period.
- the wireless communication method includes a step of determining whether or not the transmission power difference is increased based on the transmission power difference, and in the step of assigning the first time frame and the second time frame, the transmission If it is determined that the threshold value set based on the power difference increases! /, The first time frame and the second time frame are assigned so as not to overlap on the time axis.
- a wireless communication terminal is connected to a wireless communication terminal by a multicarrier using at least a first carrier and a second carrier having a predetermined frequency interval and adjacent to the first carrier.
- the connected radio base station acquires the transmission power value of the first carrier from the radio communication terminal connected via the first carrier, and the radio base station connected via the second carrier Communication terminal power
- An acquisition unit (reception unit 110) for acquiring the transmission power value of the second carrier, a transmission power difference between the transmission power value of the first carrier and the transmission power value of the second carrier.
- the transmission power difference calculation unit transmission power difference calculation unit 120 to be calculated and the transmission power difference calculated by the transmission power difference calculation unit are allowed between the first carrier and the second carrier.
- the transmission power difference determination unit (transmission power difference calculation unit 120) that determines whether or not the threshold value exceeds the threshold is set, and the transmission power difference determination unit sets the transmission power difference based on the maximum transmission power difference
- the first time frame used for transmitting uplink data using the first carrier and the second time used for transmitting uplink data using the second carrier Assign the first time frame to the wireless communication terminal connected via the first carrier and the assigning unit (transmission setting information generating unit 150) that assigns the frames so as not to overlap each other on the time axis!
- the gist is provided with a notifying unit (transmitting unit 160) for notifying the wireless communication terminal connected via the second carrier and notifying the second time frame.
- the transmission power difference calculation unit calculates the transmission power difference at a predetermined period, and the transmission power difference calculation unit calculates the transmission power difference.
- a power difference tendency determination unit (transmission power difference determination unit 160) for determining whether or not the transmission power difference is increased based on the transmission power difference calculated for each predetermined period;
- the gist is that the allocating unit allocates the first time frame and the second time frame so as not to overlap each other on the time axis when the power difference tendency determining unit determines that the transmission power difference is increasing. To do.
- a radio communication method and a radio base station capable of continuing multi-carrier communication while suppressing interference between adjacent carriers having a predetermined frequency interval Can be provided.
- FIG. 1 is a diagram showing an overall schematic configuration of a communication system 300 according to the first embodiment of the present embodiment.
- FIG. 2 is a diagram showing an upstream frequency band according to the first embodiment of the present invention.
- FIG. 3 is a functional block configuration diagram of a radio communication terminal 10 according to the first embodiment of the present invention.
- FIG. 4 is a functional block configuration diagram of a radio base station 100 according to the first embodiment of the present invention.
- FIG. 5 is a diagram showing a method of transmitting uplink data according to the first embodiment of the present invention (part 1).
- FIG. 6 is a diagram showing a method of transmitting uplink data according to the first embodiment of the present invention (part 2).
- FIG. 7 is a flowchart showing an operation of the radio communication terminal 10 according to the first embodiment of the present invention.
- FIG. 8 is a flowchart showing an operation of the radio base station 100 according to the first embodiment of the present invention.
- FIG. 9 is a functional block configuration diagram of a radio base station 100 according to the second embodiment of the present invention.
- FIG. 10 is a diagram for explaining calculation of an estimated curve difference (difference directly calculated by an estimated curve equation for each carrier) according to the second embodiment of the present invention.
- FIG. 11 is a flowchart showing an operation of the radio base station 100 according to the second embodiment of the present invention.
- FIG. 12 is a functional block configuration diagram of a base station control apparatus 200 according to the third embodiment of the present invention.
- FIG. 13 is a flowchart showing an operation of the radio base station 100 according to the fourth embodiment of the present invention.
- FIG. 1 shows an overall schematic configuration of a communication system 300 according to the first embodiment of the present embodiment.
- the communication system 300 includes a plurality of wireless communication terminals 10 (wireless communication terminals 10a to 10c) and a plurality of wireless base stations 100 (wireless base stations 100a and radios).
- the radio communication terminal 10 transmits uplink data to the radio base station 100 using the uplink frequency band allocated to the uplink data transmission. Specifically, the uplink frequency band is divided into a plurality of carriers. Radio communication terminal 10 transmits uplink data to radio base station 100 by bundling and using a plurality of carriers in an upper layer (multicarrier).
- the radio communication terminal 10 transmits the downlink frequency assigned to the downlink data transmission. Downlink data is received from the radio base station 100 using several bands. Specifically, the downlink frequency band is divided into a plurality of carriers. Then, the radio communication terminal 10 receives downlink data from the radio base station 100 by using a plurality of carriers bundled in an upper layer (multicarrier).
- the radio communication terminal 10 may communicate with a single radio base station 100 like the radio communication terminal 10a and the radio communication terminal 10c. Further, the radio communication terminal 10 may communicate with a plurality of radio base stations 100 like the radio communication terminal 10b.
- Radio base station 100 receives uplink data from radio communication terminal 10 using the uplink frequency band assigned to receive uplink data. Also, the radio base station 100 transmits the downlink data to the radio communication terminal 10 using the downlink frequency band assigned for the transmission of the downlink data.
- the base station control device 200 manages communication performed between the radio communication terminal 10 and the radio base station 100.
- the base station control device 200 performs handoff processing for switching the radio base station 100 with which the radio communication terminal 10 communicates.
- the radio communication terminal 10 performs open loop control for controlling the transmission power of the uplink data based on the reception power of the downlink data received from the radio base station 100. Further, the radio communication terminal 10 performs closed loop control for controlling the transmission power of the uplink data based on the power control information received from the radio base station 100.
- the power control information is information generated based on the reception quality (for example, signal to interference ratio (SIR)) of the uplink data received by the radio base station 100 from the radio communication terminal 10.
- SIR signal to interference ratio
- FIG. 2 shows an uplink frequency band according to the first embodiment of the present invention.
- the upstream frequency band is divided into a plurality of carriers (carrier # 1 to carrier #n).
- the center frequency of each carrier is f (l) to f (n), respectively.
- the center frequency of each carrier is a predetermined frequency interval (for example, 1.25 MHz) Adjacent to each other.
- two carriers having adjacent center frequencies are referred to as adjacent carriers.
- FIG. 3 is a functional block configuration diagram showing the radio communication terminal 10 according to the first embodiment of the present invention. Since the wireless communication terminal 10a to the wireless communication terminal 10c have the same configuration, these will be collectively referred to as the wireless communication terminal 10 below.
- the wireless communication terminal 10 includes an antenna 11, an RF / IF converter 12, a power amplifier 13, an audio input / output unit 14, a video input / output unit 15, and codec processing.
- a unit 16, a baseband processing unit 17, an operation unit 18, a memory 19, and a control unit 20 are included.
- the antenna 11 receives a signal (reception signal) transmitted by the radio base station 100.
- the antenna 11 transmits a signal (transmission signal) to the radio base station 100.
- the RF / IF converter 12 converts the frequency (Radio Frequency (RF)) of the received signal received by the antenna 11 into a frequency (Intermediate Frequency (IF)) determined by the baseband processing unit 17.
- the RF / IF converter 12 converts the frequency (IF) of the transmission signal acquired from the baseband processing unit 17 into a frequency (RF) used in wireless communication.
- the RF / IF converter 12 inputs the transmission signal converted into the radio frequency (RF) to the power amplifier 13.
- the power amplifier 13 amplifies the transmission signal acquired from the RF / IF converter 12.
- the amplified transmission signal is input to the antenna 11.
- the voice input / output unit 14 includes a microphone 14a for collecting voice and a speaker 14b for outputting voice.
- the microphone 14a is a codec processing unit that converts an audio signal based on the collected audio 1
- the speaker 14b outputs audio based on the audio signal acquired from the codec processing unit 16.
- the video input / output unit 15 includes a camera 15a that captures an image of a subject and a display unit 15b that displays characters, video, and the like.
- the camera 15a inputs a video signal to the codec processing unit 16 based on the captured video (still image or moving image).
- the display unit 15b is a codec processing unit.
- the video is displayed based on the video signal acquired from 16.
- the display unit 15b also displays characters input using the operation unit 18.
- the codec processing unit 16 processes the audio signal according to a predetermined encoding method (for example, EVRC (Enhanced Variable Rate Codec), AMR (Advanced Multi Rate Codec), or G.729 defined by ITU-T).
- a predetermined encoding method for example, EVRC (Enhanced Variable Rate Codec), AMR (Advanced Multi Rate Codec), or G.729 defined by ITU-T.
- the audio codec processing unit 16a performs encoding and decoding
- the video codec processing unit 16b performs encoding and decoding of a video signal in accordance with a predetermined encoding method (for example, MPEG-4).
- the audio codec processing unit 16a encodes the audio signal acquired from the audio input / output unit 14.
- the audio codec processing unit 16a decodes the audio signal acquired from the baseband processing unit 17.
- the video codec processing unit 16b encodes the video signal acquired from the video input / output unit 15. Further, the video codec processing unit 16b decodes the video signal obtained from the baseband processing unit 17.
- the baseband processing unit 17 modulates a transmission signal and demodulates a reception signal according to a predetermined modulation method (QPSK or 16QAM) or the like. Specifically, the baseband processing unit 17 modulates a baseband signal such as an audio signal or a video signal acquired from the codec processing unit 16. The modulated baseband signal (transmission signal) is input to the RF / IF converter 12. Further, the baseband processing unit 17 demodulates the reception signal acquired from the RF / IF converter 12. The demodulated received signal (baseband signal) is input to the codec processor 16.
- the baseband processing unit 17 modulates the information generated by the control unit 20.
- the modulated information (transmission signal) is input to the RF / IF converter 12. Further, the baseband processing unit 17 demodulates the received signal acquired from the RF / IF converter 12. The demodulated received signal is input to the control unit 20.
- the operation unit 18 is a key group composed of input keys for inputting characters and numbers, response keys for answering incoming calls (calling), outgoing keys for outgoing calls (calling), and the like. Further, when each key is pressed, the operation unit 18 inputs an input signal corresponding to the pressed key to the control unit 20.
- the memory 19 is a program for controlling the operation of the wireless communication terminal 10, a call history, Stores various data such as an address book.
- the memory 19 includes, for example, a flash memory that is a nonvolatile semiconductor memory, an SRAM (Static Random Access Memory) that is a volatile semiconductor memory, or the like.
- the control unit 20 controls the operation of the wireless communication terminal 10 (video input / output unit 15, codec processing unit 16, baseband processing unit 17, etc.) according to the program stored in the memory 19.
- control unit 20 controls the transmission power of the uplink data for each carrier. Specifically, the control unit 20 controls the transmission power of the uplink data based on the reception quality (for example, SIR) of the downlink data received from the radio base station 100 that is the transmission destination of the uplink data. (Open loop control).
- reception quality for example, SIR
- Open loop control Open loop control
- control unit 20 controls the transmission power of the uplink data based on the power control information received from the radio base station 100 that is the transmission destination of the uplink data (closed loop control).
- the power control information is information generated by the radio base station 100 based on the reception quality (eg, SIR) of uplink data.
- the power control information requests a reduction or increase in transmission power of uplink data.
- control unit 20 generates transmission power information (transmission power value) indicating transmission power of uplink data (carrier) determined by open loop control and closed loop control.
- transmission power information (transmission power value) is transmitted to the radio base station 100 connected to the radio communication terminal 10 via a carrier.
- the transmission power information includes information indicating the transmission power of adjacent carriers.
- FIG. 4 is a functional block configuration diagram showing the radio base station 100 according to the first embodiment of the present invention.
- radio base station 100 includes a reception unit 110, a transmission power difference calculation unit 120, a reception quality measurement unit 130, a power control information generation unit 140, and a transmission setting information generation unit. 150 And a transmission unit 160.
- Receiving section 110 receives uplink data from radio communication terminal 10 connected to radio base station 100 via a carrier via the carrier. Subsequently, receiving section 110 inputs the uplink data received from radio communication terminal 10 to reception quality measuring section 130.
- receiving section 110 is a radio communication terminal connected to radio base station 100 via a carrier.
- the reception unit 110 inputs the transmission power information (transmission power value) received from the wireless communication terminal 10 to the transmission power difference calculation unit 120.
- Transmission power difference calculation section 120 calculates a transmission power difference between adjacent carriers (hereinafter referred to as transmission power difference) based on transmission power information (transmission power value) acquired from reception section 110. Also, the transmission power difference calculation unit 120 determines whether or not the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference (MaxR LTxPwrDiff) allowed between adjacent carriers! Determine. If the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference, the transmission power difference calculation unit 120 determines that the transmission power difference between adjacent carriers is based on the maximum transmission power difference. The power control information generation unit 140 is notified that the set threshold value has been exceeded.
- the threshold set based on the maximum transmission power difference is a value smaller than the maximum transmission power difference (for example, a predetermined ratio (0.9)). Or the maximum transmission power difference).
- Reception quality measuring section 130 measures the reception quality (for example, SIR) of the uplink data acquired from receiving section 110.
- Reception quality measurement section 130 inputs the measured reception quality of uplink data (carrier) to power control information generation section 140.
- power control information generation section 140 Based on the reception quality of the uplink data acquired from reception quality measurement section 130, power control information generation section 140 instructs the uplink data (carrier) to increase the transmission power of the uplink data (carrier). The power for instructing the reduction of the transmission power of the carrier) is determined. Subsequently, power control information generating section 140 provides power control information for each carrier instructing increase / decrease of transmission power of the uplink data (carrier) based on the determination result based on the reception quality of the uplink data. Generate. [0054] Transmission setting information generation section 150 generates transmission setting information indicating transmission settings for uplink data using adjacent carriers.
- the transmission setting information does not overlap the normal setting, which is a transmission setting for transmitting uplink data using adjacent carriers without being divided on the time axis, and the uplink data using adjacent carriers on the time axis. Including the missing transmission which is the transmission setting to send to.
- the transmission setting information generation unit 150 when notified that the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference, A time frame is assigned to each adjacent carrier so that the time frames used for uplink data transmission using the key do not overlap. Subsequently, the transmission setting information generation unit 150 generates transmission setting information that instructs transmission of uplink data by intermittent transmission.
- the transmission setting information instructs to transmit upward data by intermittent transmission, the transmission setting information includes information indicating a time frame allocated to each adjacent carrier.
- transmission setting information generation section 150 cancels intermittent transmission when the transmission power difference between adjacent carriers is equal to or less than a threshold set based on the maximum transmission power difference. Subsequently, transmission setting information generating section 150 generates transmission setting information that instructs transmission of uplink data by normal transmission.
- Transmitting section 160 transmits the power control information generated by power control information generating section 140 to radio communication terminal 10.
- the transmission unit 160 transmits the transmission setting information generated by the transmission setting information generation unit 150 to the wireless communication terminal 10.
- the transmitter 160 is different when the radio communication terminal 10 connected via one of the adjacent carriers is different from the radio communication terminal 10 connected via the other of the adjacent carriers.
- the transmission setting information is individually transmitted to each wireless communication terminal 10.
- the transmission setting information corresponding to the wireless communication terminal 10 connected via one of the adjacent carriers indicates that the uplink data is to be transmitted by intermittent transmission
- Only information indicating a time frame used for transmission of uplink data using a carrier may be included.
- the transmission setting information corresponding to the wireless communication terminal 10 connected via the other carrier among adjacent carriers is intermittent transmission of uplink data.
- instructing to transmit at V it may be used only for information indicating the time frame used for transmission of uplink data using the other carrier.
- uplink data using carrier # 1 and uplink data using carrier # 2 are multiplexed and transmitted (i.e., for transmission of uplink data using carrier # 1).
- the time frame used and the time frame used for uplink data transmission using carrier # 2 overlap on the time axis)
- radio base station 100 transmits transmission setting information instructing transmission of uplink data using carrier # 1 by normal transmission to radio communication connected via carrier # 1. Send to terminal 10. Similarly, the radio base station 100 transmits transmission setting information instructing transmission of uplink data using carrier # 2 to the radio communication terminal 10 connected via carrier # 2. Send.
- carrier # 1 is set.
- the uplink data used and the uplink data using carrier # 2 are transmitted in a time frame divided so as not to overlap on the time axis.
- radio base station 100 includes a time frame used for uplink data transmission using carrier # 1, and a time frame used for uplink data transmission using carrier # 2. Assign time frames to Carrier # 1 and Carrier # 2 so that they do not overlap.
- the radio base station 100 includes information indicating the time frame assigned to carrier # 1, and transmits transmission setting information for instructing to transmit uplink data intermittently, using carrier # 1.
- radio base station 100 is connected via carrier # 2 with transmission setting information that includes information indicating the time frame assigned to carrier # 2 and instructed to transmit uplink data by intermittent transmission.
- Wireless communication terminal 10 Send.
- FIG. 7 is a flowchart showing the operation of the radio communication terminal 10 according to the first embodiment of the present invention.
- the main process of transmission power control is repeatedly executed at a predetermined cycle.
- radio communication terminal 10 transmits uplink data to one radio base station 100 using carrier # 1 and carrier # 2.
- radio communication terminal 10 measures the reception quality of downlink data for carrier # 1. Specifically, the radio communication terminal 10 measures the reception quality of the downlink data received from the radio base station 100 that is the transmission destination of the uplink data to be transmitted using the carrier # 1.
- radio communication terminal 10 measures the reception quality of downlink data for carrier # 2. Specifically, radio communication terminal 10 measures the reception quality of the downlink data received from radio base station 100 that is the transmission destination of the uplink data to be transmitted using carrier # 2.
- the radio communication terminal 10 determines the transmission power of the uplink data to be transmitted using the carrier # 1 by open loop control. Specifically, radio communication terminal 10 determines the transmission power of uplink data to be transmitted using carrier # 1, based on the reception quality measured in step 10.
- the radio communication terminal 10 determines the transmission power of the uplink data to be transmitted using the carrier # 2 by open loop control. Specifically, radio communication terminal 10 determines the transmission power of uplink data to be transmitted using carrier # 2, based on the reception quality measured in step 11.
- the radio communication terminal 10 receives power control information for carrier # 1. Specifically, the radio communication terminal 10 receives power control information from the radio base station 100 that is a transmission destination of uplink data to be transmitted using carrier # 1.
- the power system The control information is information generated by radio base station 100 based on the reception quality of the uplink data transmitted using carrier # 1.
- radio communication terminal 10 adjusts the transmission power of uplink data to be transmitted using carrier # 1 by closed loop control. Specifically, the radio communication terminal 10 adjusts the transmission power of the uplink data determined in step 12 based on the power control information received in step 14.
- radio communication terminal 10 transmits uplink data using carrier # 1 with transmission power determined by open loop control and closed loop control.
- the radio communication terminal 10 receives the power control information for the carrier # 2. Specifically, the radio communication terminal 10 receives power control information from the radio base station 100 that is a transmission destination of uplink data to be transmitted using the carrier # 2.
- the power control information is information generated by the radio base station 100 based on the reception quality of uplink data transmitted using carrier # 2.
- radio communication terminal 10 adjusts the transmission power of uplink data to be transmitted using carrier # 2 by closed loop control. Specifically, the radio communication terminal 10 adjusts the transmission power of the uplink data determined in step 13 based on the power control information received in step 16.
- radio communication terminal 10 transmits uplink data using carrier # 2 with transmission power determined by open loop control and closed loop control.
- step 18 the radio communication terminal 10 transmits transmission power information (transmission power value) indicating the transmission power of carrier # 1 and transmission power information (transmission power value) indicating the transmission power of carrier # 2 to the radio base station. Transmit to station 100.
- FIG. 8 is a flowchart showing the operation of the radio base station 100 according to the first embodiment of the present invention.
- step 20 the radio base station 100, based on the transmission power information (transmission power value) also received by the radio communication terminal 10, the adjacent carrier (carrier # 1 and And carrier # 2)! /, And calculate the transmission power difference (transmission power difference) of uplink data
- radio base station 100 determines whether or not the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference (MaxRLTxPwrDiff). If the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference, the radio base station 100 proceeds to the process of step 22. On the other hand, if the transmission power difference between adjacent carriers does not exceed the threshold set based on the maximum transmission power difference, radio base station 100 moves to the processing of step 23.
- MaxRLTxPwrDiff the maximum transmission power difference
- the threshold set based on the maximum transmission power difference is a value smaller than the maximum transmission power difference (for example, a predetermined ratio) that may be the maximum transmission power difference itself. (0. 9) multiplied by the maximum transmission power difference)!
- radio base station 100 generates transmission setting information instructing to transmit uplink data using adjacent carriers by intermittent transmission. Specifically, radio base station 100 overlaps the time frame used for uplink data transmission using carrier # 1 and the time frame used for uplink data transmission using carrier # 2. Assign time frames to Carrier # 1 and Carrier # 2. Subsequently, radio base station 100 generates transmission setting information for carrier # 1 including information indicating the time frame assigned to carrier # 1 and instructing to transmit uplink data by intermittent transmission. . Similarly, radio base station 100 generates transmission setting information for carrier # 2 that includes information indicating the time frame allocated to carrier # 2, and instructs transmission of uplink data by intermittent transmission.
- step 23 the radio base station 100 determines whether or not the radio communication terminal 10 is instructed by transmission setting information to transmit uplink data by intermittent transmission. When the radio base station 100 has instructed to transmit uplink data by intermittent transmission, the radio base station 100 proceeds to the processing of step 24. On the other hand, when the radio base station 100 does not instruct to transmit uplink data by intermittent transmission, the radio base station 100 ends the transmission setting process.
- the radio base station 100 cancels the intermittent transmission and generates transmission setting information instructing to transmit the uplink data by normal transmission. Specifically, the radio base station 100 instructs to transmit uplink data using carrier # 1 by normal transmission. Transmission setting information to be generated for carrier # 1. Similarly, radio base station 100 generates transmission setting information for carrier # 2 instructing transmission of uplink data using carrier # 2 by normal transmission.
- the radio base station 100 transmits the transmission setting information generated in Step 22 or Step 24 to the radio communication terminal 10. Specifically, radio base station 100 transmits the transmission setting information generated for carrier # 1 to radio communication terminal 10 connected via carrier # 1. Similarly, the radio base station 100 transmits the transmission setting information generated for the carrier # 2 to the radio communication terminal 10 connected via the carrier # 2.
- the power control information generation unit 140 is configured such that the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference (MaxRLTxPwrDiff).
- the uplink data using the adjacent carrier is transmitted using a time frame divided so as not to overlap on the time axis (that is, the uplink data using the adjacent carrier is transmitted by intermittent transmission).
- the transmission setting information to be instructed is generated.
- the transmission unit 160 transmits the transmission setting information generated by the power control information generation unit 140 to the wireless communication terminal 10 connected via the adjacent carrier.
- multicarrier communication can be continued while suppressing interference between adjacent carriers having a predetermined frequency interval.
- the radio base station 100 uses the adjacent carrier when the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference.
- the radio communication terminal 10 transmits to the radio communication terminal 10 using the time frame divided so as not to overlap on the time axis (i.e., transmitting uplink data using adjacent carriers by intermittent transmission). Instruct.
- radio base station 100 determines whether or not the transmission power difference between adjacent carriers has increased, and the transmission power difference between adjacent carriers has increased. If the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference, the wireless communication terminal 10 is notified that uplink data using the adjacent carrier is transmitted by intermittent transmission. Instruct.
- FIG. 9 is a functional block configuration diagram showing the radio base station 100 according to the second embodiment of the present invention. It should be noted that in FIG. 9, components similar to those in FIG. 4 are given the same reference numerals.
- radio base station 100 includes reception section 110, transmission power difference calculation section 120, reception quality measurement section 130, power control information generation section 140, and transmission setting information generation section 150. And a transmission power difference determination unit 160.
- Transmission power difference calculation section 120 calculates a transmission power difference between adjacent carriers every predetermined period (for example, a period in which reception section 110 receives transmission power information).
- Transmission power difference determination section 160 determines whether or not the transmission power difference between adjacent carriers calculated by transmission power difference calculation section 120 for each predetermined period has increased. Specifically, the transmission power difference determination unit 160 is based on the transmission power of the uplink data, and is an estimation curve equation (hereinafter referred to as an estimation curve) indicating a situation in which the transmission power of the uplink data changes on the time axis. (Linear type) is calculated for each adjacent carrier. Subsequently, the transmission power difference determination unit 160 determines whether or not the difference between the values calculated by the respective estimated curve equations at a predetermined time (hereinafter, estimated curve difference) exceeds the estimated curve difference threshold over a predetermined period. Determine whether.
- an estimation curve equation hereinafter referred to as an estimation curve
- the transmission power difference determination unit 160 determines that the estimated curve difference between adjacent carriers exceeds the estimated curve threshold over a predetermined period.
- the power control information generation unit 140 is notified that the value is exceeded.
- the notch period is a notch interval calculated based on reception strength and reception quality (SIR). Determined by. Specifically, the notch period includes a notch interval before the peak point and a notch interval after the peak point of the transmission power estimation curve.
- the radio base station 100 transmits uplink data using the adjacent carrier by intermittent transmission.
- M m (t) a P m ( ⁇ + (1- ⁇ ) ⁇ M m (t -At) ⁇ ⁇ ⁇ ⁇ (1)
- the transmission power of carrier # 2 at time t is expressed as "P (t)"
- career # 2
- the estimated curve formula “M (t)” is calculated by the following formula (2). 13 is career #
- the estimated curve difference “P” is the value calculated by the estimated curve formula “M (t)” and the
- the transmission power difference determination unit 160 determines that the estimated curve difference “P” is the estimated music during the notch period.
- Transmission setting information generation section 150 indicates that the estimated curve difference between adjacent carriers exceeds the estimated curve threshold over a predetermined period, and that the transmission power difference between adjacent carriers is based on the maximum transmission power difference! When the fact that the set threshold value is exceeded is notified, transmission setting information for instructing the radio communication terminal 10 to transmit uplink data using adjacent carriers by intermittent transmission is generated.
- FIG. 11 is a flowchart showing the operation of the radio base station 100 according to the second embodiment of the present invention. Note that the transmission setting process shown in FIG. 11 is executed in place of the transmission setting process shown in FIG. 8 described above.
- the adjacent carrier is the carrier #.
- carrier # 2 The case of 1 and carrier # 2 will be described as an example. In addition, it is assumed that the radio communication terminal 10 transmits uplink data to one radio base station 100 using the carrier # 1 and the carrier # 2. Furthermore, it is assumed that the transmission power of carrier # 1 is greater than the transmission power of carrier # 2.
- radio base station 100 receives transmission power information (transmission power value) indicating transmission power of carrier # 1 from radio communication terminal 10. Subsequently, the radio base station 100 transmits uplink data transmitted via carrier # 1 with high transmission power. Based on the transmission power of, the estimated curve formula of carrier # 1 is calculated.
- transmission power information transmission power value
- radio base station 100 receives transmission power information (transmission power value) indicating the transmission power of carrier # 2 from radio communication terminal 10. Subsequently, the radio base station 100 determines the estimated curve equation of carrier # 2 (or the lower estimated curve equation) based on the transmission power of uplink data transmitted via carrier # 2 having a low transmission power. Is calculated.
- transmission power information transmission power value
- the radio base station 100 determines the estimated curve equation of carrier # 2 (or the lower estimated curve equation) based on the transmission power of uplink data transmitted via carrier # 2 having a low transmission power. Is calculated.
- the radio base station 100 performs the estimation curve equation of carrier # 1 calculated in step 30 and the estimation curve equation (or downward estimation curve equation) of carrier # 2 calculated in step 31. Based on the above, it is determined whether the transmission power difference between carrier # 1 and carrier # 2 exceeds the estimated curve difference threshold value. Specifically, radio base station 100 determines the difference (estimated curve) between the value calculated by the estimated curve equation of carrier # 1 and the value calculated by the estimated curve equation of carrier # 2 (or the lower estimated curve equation). Calculate the difference. Subsequently, the radio base station 100 determines whether or not the estimated curve difference exceeds the estimated curve difference threshold over a predetermined period.
- the radio base station 100 proceeds to the process of step 33. On the other hand, if the estimated curve difference does not exceed the estimated curve difference threshold for a predetermined period, the radio base station 100 proceeds to the process of step 35.
- radio base station 100 determines whether or not the transmission power difference between carrier # 1 and carrier # 2 exceeds a threshold set based on the maximum transmission power difference. When the transmission power difference exceeds the threshold set based on the maximum transmission power difference, the radio base station 100 proceeds to the process of step 34. On the other hand, in the case where the transmission power difference exceeds the threshold set based on the maximum transmission power difference! /, N! /, The radio base station 100 proceeds to the process of step 35.
- the radio base station 100 generates transmission setting information instructing to transmit uplink data using adjacent carriers by intermittent transmission. Specifically, radio base station 100 overlaps the time frame used for uplink data transmission using carrier # 1 and the time frame used for uplink data transmission using carrier # 2. Assign time frames to Carrier # 1 and Carrier # 2. Next, the radio base station 100 The transmission setting information that includes the information indicating the time frame assigned to # 1 and that instructs to transmit uplink data by intermittent transmission is generated for carrier # 1. Similarly, radio base station 100 generates transmission setting information for carrier # 2 that includes information indicating the time frame allocated to carrier # 2, and instructs transmission of uplink data by intermittent transmission.
- step 35 the radio base station 100 determines whether or not the radio communication terminal 10 is instructed by transmission setting information to transmit uplink data by intermittent transmission. When the radio base station 100 has instructed to transmit uplink data by intermittent transmission, the radio base station 100 proceeds to the processing of step 36. On the other hand, when the radio base station 100 does not instruct to transmit uplink data by intermittent transmission, the radio base station 100 ends the transmission setting process.
- the radio base station 100 cancels the intermittent transmission and generates transmission setting information instructing to transmit the uplink data by the normal transmission. Specifically, radio base station 100 generates transmission setting information for carrier # 1 instructing to transmit uplink data using carrier # 1 by normal transmission. Similarly, radio base station 100 generates transmission setting information for carrier # 2 instructing transmission of uplink data using carrier # 2 by normal transmission.
- step 37 the radio base station 100 transmits the transmission setting information generated in step 34 or step 36 to the radio communication terminal 10. Specifically, radio base station 100 transmits the transmission setting information generated for carrier # 1 to radio communication terminal 10 connected via carrier # 1. Similarly, the radio base station 100 transmits the transmission setting information generated for the carrier # 2 to the radio communication terminal 10 connected via the carrier # 2.
- the power control information generation unit 140 simply determines that the transmission power difference between adjacent carriers exceeds the threshold value set based on the maximum transmission power difference. If the transmission power difference between adjacent carriers is increased and the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference, the adjacent carrier is used.
- the radio communication terminal 10 is instructed to transmit the uplink data using the time frame divided so as not to overlap on the time axis (that is, to transmit uplink data using adjacent carriers by intermittent transmission). .
- the transmission power of the carrier temporarily increases due to open loop control or closed loop control as reception quality deteriorates due to the influence of fading or the like. In such a case, even if the transmission power difference between adjacent carriers temporarily exceeds the threshold set based on the maximum transmission power difference, if the effect of fading is eliminated, the difference between adjacent carriers The transmission power difference is likely to be within the maximum transmission power difference.
- unnecessary intermittent transmission is performed when the transmission power difference between adjacent carriers temporarily exceeds the threshold set based on the maximum transmission power difference. It is possible to suppress the communication.
- uplink data using adjacent carriers is transmitted using a time frame divided so as not to overlap on the time axis (that is, adjacent carriers are transmitted).
- the radio base station 100 determines whether or not it is instructed to transmit the uplink data used by intermittent transmission).
- base station control apparatus 200 determines whether or not to instruct to transmit uplink data using adjacent carriers by intermittent transmission. Then, the base station control device 200 transmits the uplink data by intermittent transmission to the radio base station 10.
- the wireless communication terminal 10 is instructed via 0.
- FIG. 12 shows a base station control apparatus according to the third embodiment of the present invention.
- FIG. 2 is a functional block configuration diagram showing 200.
- FIG. 2 is a functional block configuration diagram showing 200.
- base station control apparatus 200 includes transmission power information reception section 210, transmission power difference calculation section 220, and transmission setting instruction section 230.
- Transmission power information receiving section 210 receives transmission power information (transmission power value) indicating the transmission power of adjacent carriers (uplink data) from radio base station 100.
- transmission power information transmission power value
- the power information receiving unit 210 receives transmission power information indicating the transmission power of carrier # 1 from the radio base station 100a, and receives transmission power information indicating the transmission power of carrier # 2 from the radio base station 100b.
- Transmission power information receiving section 210 may collectively receive transmission power information indicating the transmission power of carrier # 1 and carrier # 2 from radio base station 100a. Similarly, transmission power information receiving section 210 may receive transmission power information indicating the transmission powers of carrier # 1 and carrier # 2 together from radio base station 100b.
- Transmission power difference calculation section 220 calculates a transmission power difference between adjacent carriers (hereinafter referred to as transmission power difference) based on transmission power information (transmission power value) received by transmission power information reception section 210. Also, the transmission power difference calculation unit 220 determines whether or not the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference (MaxRLTxPwrDiff) allowed between adjacent carriers. When the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference, the transmission power difference calculation unit 220 determines that the transmission power difference between adjacent carriers is based on the maximum transmission power difference. Notify transmission setting instruction section 230 that the set threshold value has been exceeded.
- transmission power difference a transmission power difference between adjacent carriers
- the transmission setting instructing unit 230 uses the adjacent carrier for the uplink direction.
- the transmission of data by intermittent transmission is made fe to the wireless communication terminal 10 via the wireless base station 100.
- the transmission setting instruction unit 230 indicates that the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference.
- uplink data using adjacent carriers is transmitted using a time frame divided so as not to overlap on the time axis (that is, uplink data using adjacent carriers is transmitted intermittently). To do).
- Multi-carrier communication can be continued.
- the radio base station 100 uses the adjacent carrier when the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference.
- the radio communication terminal 10 transmits to the radio communication terminal 10 using the time frame divided so as not to overlap on the time axis (i.e., transmitting uplink data using adjacent carriers by intermittent transmission). Instruct.
- the radio base station 100 when the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference, Wireless transmission of uplink data using a carrier with large transmission power is stopped for a period of time until the transmission power difference between adjacent carriers is equal to or less than a threshold set based on the maximum transmission power difference. Instruct the communication terminal 10.
- FIG. 13 is a flowchart showing the operation of the radio base station 100 according to the fourth embodiment of the present invention. Note that the transmission setting process shown in FIG. 13 is executed in place of the transmission setting process shown in FIG. 8 described above.
- step 40 the radio base station 100 determines the difference in transmission power of uplink data (transmission power) for adjacent carriers (carrier # 1 and carrier # 2). Calculate the difference.
- step 41 the radio base station 100 determines whether or not the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference (MaxRLTxPwrDiff). When the transmission power difference between adjacent carriers exceeds the threshold set based on the maximum transmission power difference, the radio base station 100 proceeds to the process of step 42. On the other hand, if the transmission power difference between adjacent carriers does not exceed the threshold set based on the maximum transmission power difference, the radio base station 100 proceeds to the process of step 47.
- the threshold set based on the maximum transmission power difference is a value smaller than the maximum transmission power difference which may be the maximum transmission power difference itself (for example, a predetermined ratio). (0. 9) multiplied by the maximum transmission power difference)!
- step 42 the radio base station 100 determines whether or not the radio communication terminal 10 is instructed to stop transmission of uplink data using a carrier having a large transmission power among adjacent carriers. In other words, the radio base station 100 proceeds to the process of step 45 when the transmission stop is set, while the radio base station is set to stop the transmission. In this case, go to step 43.
- radio base station 100 generates transmission setting information instructing a transmission stop to stop transmission of uplink data using a carrier having a large transmission power among adjacent carriers.
- the radio base station 100 sets a predetermined waiting time in the timer.
- the predetermined waiting time is a time shorter than the non-communication time used for determining whether the radio base station 100 instructs the radio communication terminal 10 to disconnect the carrier, Of these, it is the time allowed to maintain a carrier with high transmission power. Note that the disconnection of the carrier means that the transmission of the carrier is stopped.
- step 45 the radio base station 100 determines whether or not a timer for which a predetermined waiting time has been set has timed out. The radio base station 100 proceeds to the processing of step 46 when the timer times out. On the other hand, if the timer has not timed out, radio base station 100 proceeds to the process of step 49.
- radio base station 100 performs transmission setting for instructing provisional transmission to tentatively transmit uplink data using a carrier having a large transmission power among adjacent carriers. Generate information.
- provisional transmission refers to transmitting uplink data in which the time required for transmission is short in order to maintain a carrier having high transmission power among adjacent carriers.
- the radio base station 100 also instructs the radio communication terminal 10 to transmit uplink data with transmission power in which the transmission power difference between adjacent carriers does not exceed the maximum transmission power difference. .
- step 47 the radio base station 100 determines whether or not the radio communication terminal 10 is instructed to stop transmission of uplink data using a carrier having a large transmission power among adjacent carriers. In other words, the radio base station 100 moves to the process of step 48. If the transmission stop is set, the radio base station 100 sets the transmission stop. If not, the process proceeds to step 49.
- radio base station 100 generates transmission setting information instructing cancellation of uplink data transmission suspension using a carrier having a large transmission power among adjacent carriers.
- step 49 the unspring base station 100 transmits the transmission setting information generated in step 43, step 46 or step 48 to the radio communication terminal 10.
- Radio base station 100 determines that the transmission power difference between adjacent carriers is the maximum transmission power when the uplink data transmission suspension is not canceled within a certain period, that is, even after the certain period has elapsed. If the threshold is not less than or equal to the threshold set based on the difference, the wireless communication terminal 10 is instructed to disconnect the carrier having a large transmission power among the adjacent carriers.
- the radio base station 100 when the transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference, the radio base station 100 Among them, transmission of uplink data using a carrier having a large transmission power is stopped for a certain period until the transmission power difference between adjacent carriers is equal to or less than a threshold set based on the maximum transmission power difference. Instructs the wireless communication terminal 10.
- multicarrier communication can be continued while suppressing interference between adjacent carriers having a predetermined frequency interval.
- radio base station 100 uses a carrier having a large transmission power among adjacent carriers. Even if it is instructed to stop transmission of uplink data, it instructs the provisional transmission of uplink data when the timer times out.
- the predetermined threshold value is determined according to how far the center frequencies of the two carriers are separated. Specifically, the greater the distance between the center frequencies of the two carriers, the lower the degree of interference between the two carriers. Therefore, the predetermined threshold is set to a low value.
- the operation of the radio base station 100 according to the first embodiment, the second embodiment, and the fourth embodiment described above can also be provided as a program executable by a computer.
- the transmission setting information instructing intermittent transmission is information on uplink data using a carrier having a large transmission power among adjacent carriers. It may be information indicating the number of slots to stop transmission. Note that uplink data transmission using a carrier having low transmission power among neighboring carriers is performed in a slot that stops transmission of uplink data using a carrier having high transmission power. [0157] In this case, the greater the difference in transmission power between adjacent carriers, the longer the number of slots for stopping uplink data transmission using a carrier with higher transmission power is set. It is preferable that
- the intermittent transmission described above is synchronized between a plurality of wireless communication terminals that are accommodated in the same wireless base station and whose transmission power difference between adjacent carriers exceeds a threshold set based on the maximum transmission power difference. Therefore, the force S to suppress carrier interference between wireless communication terminals can be achieved.
- the control area of the wireless base station is increased. Carrier interference between straddled wireless communication terminals can be suppressed.
- the radio communication method and the radio base station according to the present invention can continue multicarrier communication while suppressing interference between adjacent carriers having a predetermined frequency interval. Therefore, it is useful in wireless communication such as mobile communication.
Description
Claims
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US12/439,150 US8442575B2 (en) | 2006-08-30 | 2007-08-29 | Radio communication method and radio base station |
CN2007800322766A CN101513106B (zh) | 2006-08-30 | 2007-08-29 | 无线通信方法和无线基站 |
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JP2006233803A JP4829049B2 (ja) | 2006-08-30 | 2006-08-30 | 無線通信方法及び無線基地局 |
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US (1) | US8442575B2 (ja) |
JP (1) | JP4829049B2 (ja) |
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KR101088920B1 (ko) * | 2006-07-28 | 2011-12-01 | 교세라 가부시키가이샤 | 무선 통신 방법 및 무선 기지국 |
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- 2006-08-30 JP JP2006233803A patent/JP4829049B2/ja not_active Expired - Fee Related
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- 2007-08-29 CN CN2007800322766A patent/CN101513106B/zh not_active Expired - Fee Related
- 2007-08-29 KR KR1020097005246A patent/KR101016149B1/ko not_active IP Right Cessation
- 2007-08-29 US US12/439,150 patent/US8442575B2/en not_active Expired - Fee Related
- 2007-08-29 WO PCT/JP2007/066813 patent/WO2008026662A1/ja active Application Filing
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RU2535785C2 (ru) * | 2009-02-13 | 2014-12-20 | Телефонактиеболагет Лм Эрикссон (Пабл) | Управление энергопотреблением узла беспроводной сети |
US11696238B2 (en) | 2009-02-13 | 2023-07-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Controlling energy consumption of a wireless network node |
JP2013093747A (ja) * | 2011-10-26 | 2013-05-16 | Sony Corp | 送信装置、送信方法、受信装置、受信方法、およびプログラム |
Also Published As
Publication number | Publication date |
---|---|
CN101513106A (zh) | 2009-08-19 |
CN101513106B (zh) | 2012-01-11 |
JP4829049B2 (ja) | 2011-11-30 |
KR20090053816A (ko) | 2009-05-27 |
JP2008060794A (ja) | 2008-03-13 |
KR101016149B1 (ko) | 2011-02-17 |
US20100029318A1 (en) | 2010-02-04 |
US8442575B2 (en) | 2013-05-14 |
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