WO2005050943A1 - 無線通信装置、基地局装置、通信端末装置及び伝送レート予測方法 - Google Patents
無線通信装置、基地局装置、通信端末装置及び伝送レート予測方法 Download PDFInfo
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- WO2005050943A1 WO2005050943A1 PCT/JP2004/017095 JP2004017095W WO2005050943A1 WO 2005050943 A1 WO2005050943 A1 WO 2005050943A1 JP 2004017095 W JP2004017095 W JP 2004017095W WO 2005050943 A1 WO2005050943 A1 WO 2005050943A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Definitions
- Wireless communication device base station device, communication terminal device, and transmission rate prediction method
- the present invention relates to a wireless communication device, a base station device, a communication terminal device, and a transmission rate prediction method, for example, a wireless communication device, a base station device, a communication terminal device, and a transmission rate prediction method for performing high-speed packet communication in HSDPA.
- a wireless communication device for example, a wireless communication device, a base station device, a communication terminal device, and a transmission rate prediction method for performing high-speed packet communication in HSDPA.
- the HSDPA High Speed Downlink Packet Access
- a terminal measures the reception quality and notifies the base station of the transmission rate at which it can receive based on the measured reception quality.
- a terminal in HSDPA measures the signal-to-noise ratio of a pilot channel, which is a signal constantly transmitted from the base station, as reception quality, and selects a receivable transmission rate candidate using information on the measured reception quality. Then, information on the selected transmission rate is transmitted to the base station.
- the base station receives transmission rate information from a plurality of terminals, selects an appropriate modulation scheme for packet data to be transmitted to a terminal having a good reception state, modulates the packet data, and performs a process called scheduling. To the terminal after Send the packet data.
- Patent Document 1 JP-A-2002-44036
- the transmission rate can be indirectly estimated based on the number of antenna marks, and the antenna mark indicates the radio field intensity. Therefore, since the transmission rate is not always accurately represented, the user cannot obtain accurate transmission rate information. Therefore, for example, when the user starts downloading data in consideration of the transmission rate estimated from the number of antenna marks, the download time may be longer than expected by the user, and the time required for the download by the user. Since it can be known after the download has started, if the user cannot wait for the time until the download is completed, processing such as stopping the download is required, which is inconvenient and inconvenient.
- the transmission rate measured during data communication by HSDPA needs to follow a rapid fluctuating fluctuation with high accuracy. If the transmission rate measured during communication is used as it is as the predicted value of the transmission rate in the next communication, an accurate transmission rate predicted value cannot be obtained.
- the wireless communication apparatus includes a reception quality measurement unit that calculates a measurement value indicating reception quality from a reception quality measurement signal received before the start of packet data communication, and a measurement result obtained by the reception quality measurement unit.
- Transmission rate selection means for selecting the transmission rate of the packet data based on the measured value; and a transmission rate prediction value based on an average transmission rate obtained by averaging the transmission rates selected by the transmission rate selection means for a predetermined time. And a transmission rate prediction means.
- a base station apparatus includes a transmission rate predicted value information extracting means for extracting transmission rate predicted value information, which is information of a transmission rate predicted value of a communication terminal apparatus before the start of packet data communication, from a received signal; Receiving quality measuring means for obtaining a measurement value indicating the reception quality of each communication terminal device before the start of packet data communication from the signal and obtaining the measurement value of each communication terminal device during the packet data communication; and The allocation frequency of each communication terminal device before the start of packet data communication and each communication terminal device during packet data communication so as to fall within predetermined resources based on the above-mentioned measured value and the transmission rate prediction value information obtained in Terminal assignment simulating means for determining the assignment frequency of the terminal, and the assignment frequency and the transmission rate prediction value information determined by the terminal assignment simulating means. Transmission rate predicted value information calculating means for correcting the transmission rate predicted value information on the basis of the transmission rate predicted value information corrected by the transmission rate predicted value information calculating means. And a transmitting means for transmitting to the terminal device
- a transmission rate prediction method includes a step of calculating a measurement value indicating reception quality from a reception quality measurement signal received before the start of packet data communication, and a transmission rate of the packet data based on the measurement value. And a step of obtaining a transmission rate predicted value from an average transmission rate obtained by averaging the selected transmission rates for a predetermined time.
- FIG. 1 shows a configuration of a wireless communication apparatus according to Embodiment 1 of the present invention.
- FIG. 2 shows a relationship between CQI and SIR according to Embodiment 1 of the present invention.
- FIG. 3 shows a configuration of a transmission rate prediction unit according to Embodiment 1 of the present invention.
- FIG. 4 is a diagram showing an appearance of a wireless communication apparatus according to Embodiment 1 of the present invention.
- FIG. 5 shows a configuration of a wireless communication device according to a second embodiment of the present invention.
- FIG. 6 shows a configuration of a wireless communication device according to a third embodiment of the present invention.
- FIG. Fig. 8 shows the configuration of a transmission rate prediction unit according to Embodiment 3-[Fig. 8] shows the configuration of a radio communication device according to Embodiment 4 of the present invention-[Fig. 9]
- Fig. 10 shows the configuration of a device-[Fig. 10] shows the configuration of a transmission rate prediction unit according to Embodiment 4 of the present invention-[Fig. 11] shows the configuration of a base station device according to Embodiment 5 of the present invention-[ FIG. 12]
- FIG. 13 shows the configuration of a wireless communication apparatus according to Embodiment 6 of the present invention.
- FIG. 14 shows the configuration of a transmission rate predicting unit according to Embodiment 6 of the present invention.
- Fig. 16 shows a configuration of a wireless communication device according to a seventh embodiment. [Fig. 16] A flowchart showing an operation of the wireless communication device according to the seventh embodiment of the present invention.
- FIG. 17 shows a display on the display unit according to Embodiment 7 of the present invention.
- FIG. 1 shows a configuration of a wireless communication device 100 according to Embodiment 1 of the present invention.
- RF transmission / reception section 102 down-converts the reception signal received by antenna 101 to a radio frequency power baseband frequency and outputs the result to packet CH demodulation section 103 and pilot CH demodulation section 104, and modulating section 107
- the transmission signal including the information of the transmission rate candidate input from the base station is up-converted to the baseband frequency radio frequency and transmitted from the antenna 101.
- Packet CH demodulation section 103 demodulates the received signal input from RF transmission / reception section 102 and performs parsing. Get packet data for the packet channel.
- Pilot CH demodulation section 104 demodulates a pilot signal, which is a reception quality measurement signal input from RF transmission / reception section 102, and outputs it to reception state measurement section 105.
- Reception state measurement section 105 which is a reception quality measurement means, measures the SIR (Signal to Interference Ratio), which is a value indicating the reception state, using the pilot signal input from pilot CH demodulation section 104 and transmits the transmission rate. Output to candidate selection unit 106. Pilot signal strength Since the required SIR indicates the reception quality of the pilot channel, the reception state measuring unit 105 transmits the signal to the wireless communication apparatus 100 before measuring the reception state. From the power ratio information, which is information on the power ratio between the pilot channel and the packet transmission channel, a coefficient for determining the reception quality of the pilot channel is obtained from the power ratio information, and is input from the pilot channel demodulation unit 104. The SIR in the packet transmission channel is obtained by multiplying the measured value of the SIR by the obtained coefficient.
- SIR Signal to Interference Ratio
- Each CQI value defines the corresponding packet transmission rate, and serves as a recommended value for the packet transmission rate of the communication partner.
- the communication partner determines the packet transmission rate while referring to the CQI value. Then, the transmission rate candidate selection unit 106 calculates the value of the SIR input from the reception state measurement unit 105 using a stored formula and selects CQI as the transmission rate. Then, transmission rate candidate selection section 106 outputs CQI, which is the transmission rate of the selected packet data, to transmission rate prediction section 108 and modulation section 107.
- CQI is not limited to five types, Any kind of CQI can be used.
- modulation section 107 modulates the transmission signal including the CQI input from transmission rate candidate selection section 106 and outputs the modulated transmission signal to RF transmission / reception section 102.
- Transmission rate predicting section 108 performs threshold processing on CQIs input from transmission rate candidate selecting section 106, and then averages them to obtain an averaged CQI as an average transmission rate. It outputs to transmission rate prediction control section 110 as a transmission rate prediction value when starting communication. The details of the transmission rate prediction unit 108 will be described later.
- Key input determination section 109 detects the presence or absence of a key input, and outputs a signal indicating that a key input has been made to transmission rate prediction control section 110 when a key input is detected.
- Transmission rate prediction control section 110 when a signal indicating that a key is input from key input determination section 109 is input, converts the information of the transmission rate prediction value into data that is easy for the user to understand and displays the data.
- the power output to section 111 or the information on the predicted transmission rate input from transmission rate predicting section 108 is output to display section 111 as it is.
- the display unit 111 displays the information of the transmission rate prediction value input from the transmission rate prediction control unit 110 on a display such as a liquid crystal screen.
- FIG. 3 is a block diagram showing a configuration of the transmission rate prediction unit 108.
- Threshold judging section 301 compares the CQI input from transmission rate candidate selecting section 106 with the threshold, and if the CQI is greater than or equal to the threshold value, divides the input CQI into a transmission rate averaging section. Output to 302 and set to 0 if CQI is less than the threshold. This is because, in HSDPA, a wireless communication device having a high transmission rate is assigned as a wireless communication device for transmitting packet data by scheduling, and therefore, if the CQI is low, it is not assigned as a wireless communication device for transmitting packet data. This is to consider the possibility.
- the threshold value can be set to an arbitrary value according to the propagation environment or traffic volume at that time.
- Transmission rate averaging section 302 averages the transmission rate corresponding to the CQI input from threshold determination section 301 for a certain period of time. This is because, in HSDPA, the CQI is calculated every very short time (2 ms), but the CQI obtained every short time is large due to fading fluctuation. Therefore, it is necessary to average the corresponding transmission rates over a relatively long period of time. The averaging time to reduce the effects of fusing to some extent is
- Transmission rate averaging section 302 averages the CQI to obtain a transmission rate prediction value, and then outputs the value to offset adding section 303.
- Offset adding section 303 preliminarily stores an offset value, which is a predetermined constant, and multiplies the averaged CQI input from transmission rate averaging section 302 by the offset value to estimate the transmission rate. A value is obtained, and information on the obtained transmission rate prediction value is output to the transmission rate prediction control unit 110.
- FIG. 4 shows a state where a predicted transmission rate is displayed on display 111 of wireless communication apparatus 100.
- the display unit 111 displays a transmission rate prediction value such as “transmission rate 2.8 kbps” on the display unit 111. Therefore, the transmission rate can be visually checked directly.
- the transmission rate prediction value can be obtained by averaging the CQI for a predetermined time before data transmission.
- the transmission rate can be predicted more accurately before the start of data communication than in the case of estimating.
- the time required for data download can be calculated using the calculated transmission rate prediction value, so that the user can know the time required for download before starting the download. Can improve usability.
- the transmission rate predicted value is indicated by a numerical value.
- the present invention is not limited to this.
- the transmission rate predicted value is indicated by a non-numeric expression such as a color or a symbol.
- the transmission rate predicted value may be notified by voice from a speaker, or the user may be notified of the transmission rate predicted value using an arbitrary method.
- the transmission rate prediction value is displayed on the display unit of the wireless communication device.
- the present invention is not limited to this, and the transmission rate prediction value can be displayed by using an arbitrary display unit such as connecting the wireless communication apparatus to a personal computer and displaying it on the screen of the personal computer.
- FIG. 5 is a block diagram showing a configuration of wireless communication apparatus 500 according to Embodiment 2 of the present invention.
- RF transmission / reception section 502 down-converts a reception signal received by antenna 501 to a baseband frequency with a radio frequency, and outputs the result to broadcast information demodulation section 503.
- Broadcast information demodulation section 503 demodulates the received signal input from RF transmitting / receiving section 502 to obtain broadcast information, and outputs the obtained broadcast information to transmission rate prediction section 505.
- Broadcast information transmitted from a base station device not shown includes traffic information indicating a traffic amount and the like. In this case, communication is performed by sharing communication resources between a plurality of wireless communication devices using a common channel.
- the traffic volume is the average number of users actually using the common channel.
- the traffic volume is not limited to the case where a common channel is used, but may be any channel volume as long as the channel is the same channel used by a plurality of users.
- Transmission rate acquisition section 504 sets a plurality of transmission rates in advance and, when an output instruction signal is input, outputs a predetermined transmission rate to transmission rate prediction section 505.
- the transmission rate prediction unit 505 obtains a transmission rate prediction value based on the transmission rate information input from the transmission rate acquisition unit 504 and the broadcast information input from the broadcast information demodulation unit 503. That is, the transmission rate prediction unit 505 corrects the transmission rate input from the transmission rate acquisition unit 504 by dividing the transmission rate prediction value by the number of users using the common channel obtained from the broadcast information, and A predicted value can be determined. It should be noted that the transmission rate prediction value is not limited to the case where the transmission rate is divided by the number of users to obtain the transmission rate prediction value, but the transmission rate prediction value can be obtained using the broadcast information such as the number of users by any method.
- the transmission rate predicted value is displayed by a numerical value.
- the present invention is not limited to this.
- the transmission rate predicted value is displayed by a non-numeric expression such as a color or a symbol.
- the transmission rate predicted value may be notified by voice from a speaker, or the user may be notified of the transmission rate predicted value using an arbitrary method.
- the transmission rate prediction value is displayed on the display unit of the wireless communication device.
- the present invention is not limited to this. Any display such as connecting the wireless communication device to a personal computer and displaying it on the screen of the personal computer is possible.
- the transmission rate prediction value can be displayed using the section.
- FIG. 6 is a block diagram showing a configuration of wireless communication apparatus 600 according to Embodiment 3 of the present invention.
- Wireless communication apparatus 600 according to Embodiment 3 differs from wireless communication apparatus 100 according to Embodiment 1 shown in Fig. 1 in that broadcast information demodulation section 601 is added as shown in Fig. 6.
- FIG. 6 portions having the same configuration as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- Broadcast information demodulating section 601 demodulates a received signal input from RF transmitting / receiving section 102 to acquire broadcast information, and outputs the acquired broadcast information to transmission rate predicting section 108.
- Broadcast information transmitted from a base station device not shown includes traffic information indicating a traffic amount and the like. In this case, wireless communication apparatus 600 and the base station apparatus perform communication by using a common channel to share communication resources.
- FIG. 7 is a block diagram showing a configuration of the transmission rate prediction unit 108.
- Transmission rate prediction section 108 according to Embodiment 3 is different from transmission rate prediction section 108 according to Embodiment 1 shown in FIG. 3 in that user transmission rate prediction section 701 is added as shown in FIG. Add.
- FIG. 7 the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
- User transmission rate prediction section 701 obtains a transmission rate prediction value based on the transmission rate prediction value input from offset adding section 303 and the broadcast information input from broadcast information demodulation section 601. That is, the user transmission rate prediction unit 701 obtains the transmission rate prediction value from the broadcast information. By dividing the obtained common channel by the number of users using the common channel, the transmission rate prediction value input from the offset adding section 303 is corrected to obtain a final transmission rate prediction value. The information is output to transmission rate prediction control section 110. It is to be noted that the transmission rate prediction value is not limited to the case where the transmission rate is divided by the number of users to obtain the transmission rate prediction value, but the transmission rate prediction value can be obtained by using a broadcast information such as the number of users by any method.
- a transmission rate prediction value is obtained by using broadcast information, so that a more accurate transmission rate prediction value is obtained. This comes out.
- the transmission rate predicted value is displayed by a numerical value.
- the present invention is not limited to this.
- the transmission rate predicted value is displayed by a non-numeric expression method such as a color or a symbol.
- the transmission rate predicted value may be notified by voice from a speaker, or the user may be notified of the transmission rate predicted value using an arbitrary method.
- the transmission rate prediction value is displayed on the display unit of the wireless communication device.
- the present invention is not limited to this. Any display such as connecting the wireless communication device to a personal computer and displaying it on the screen of the personal computer is possible.
- the transmission rate prediction value can be displayed using the section.
- FIG. 8 is a block diagram showing a configuration of radio communication apparatus 800 according to Embodiment 4 of the present invention.
- Radio communication apparatus 800 according to Embodiment 4 differs from radio communication apparatus 100 according to Embodiment 1 shown in FIG. 1 in that transmission rate predicted value information demodulation section 801 is added as shown in FIG. I do.
- FIG. 8 the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- Transmission rate predicted value information demodulating section 801 which is transmission rate predicted value information extracting means demodulates a received signal input from RF transmitting / receiving section 102 and transmits transmission rate predicted value information as transmission rate predicted value receiving information. It is extracted and output to transmission rate prediction section 108.
- Transmission rate predicting section 108 performs threshold processing on transmission rate candidate information input from transmission rate candidate selecting section 106, averages the information, and obtains a transmission rate prediction value.
- the transmission rate prediction input from the rate prediction value information demodulation unit 801 The transmission rate ratio with the measurement information is obtained.
- the transmission rate predicting section 108 corrects the transmission rate predicted value by multiplying the calculated transmission rate ratio by the calculated transmission rate ratio, and outputs the information of the corrected transmission rate predicted value to the modulation section 107 and the transmission rate prediction control. Output to section 110.
- the transmission rate predicted value to be corrected is obtained after the transmission rate predicted value used when generating the transmission rate predicted value information extracted by the transmission rate predicted value information demodulation unit 801. The details of the transmission rate prediction unit 108 will be described later.
- Modulation section 107 performs transmission including transmission rate candidate information input from transmission rate candidate selection section 106 and transmission rate prediction value transmission information that is information on the transmission rate prediction value input from transmission rate prediction section 108.
- the signal is modulated and output to RF transmitting / receiving section 102.
- FIG. 9 is a block diagram showing a configuration of base station apparatus 900.
- RF transmitting / receiving section 902 down-converts the received signal received by antenna 901 to a radio frequency power baseband frequency and outputs the result to transmission rate predicted value receiving section 903.
- Transmission rate predicted value receiving section 903 extracts transmission rate predicted value information included in the received signal and outputs the information to transmission rate predicted value information calculating section 907.
- the number of data transmission units 904-1-1 904-n is equal to the number of wireless communication devices of the communicable user, and temporarily transmits transmission data addressed to a plurality of wireless communication devices in service. And outputs it to the modulation unit 905 at a predetermined timing. Further, the data transmission units 904-1 904-n output to the traffic monitoring unit 906 transmission data information such as a transmission data amount and a transmission data type addressed to each of the plurality of wireless communication devices in service.
- Modulation section 905 modulates a transmission signal including transmission data input from data transmission section 904-1 and transmission rate prediction value information input from transmission rate prediction value information calculation section 907, and performs RF transmission and reception. Output to section 902.
- Traffic monitoring section 906 measures the traffic amount based on the transmission data information input from data transmission sections 904-1-1 904-n.
- the traffic volume may be the average number of users using the common channel, or may be a value that takes into account more advanced traffic prediction and rate limit information on the network side. Then, traffic monitoring section 906 outputs traffic information, which is information on the measured traffic amount, to transmission rate predicted value information calculating section 907. Power.
- Transmission rate predicted value information calculating section 907 calculates the transmission rate predicted value based on V based on the transmission rate predicted value information input from transmission rate predicted value receiving section 903 and the traffic information input from traffic monitoring section 906. Then, transmission rate prediction value information, which is information on the obtained transmission rate prediction value, is output to modulation section 905. That is, the transmission rate predicted value information calculation unit 907 divides the transmission rate predicted value by the number of users using the common channel obtained from the broadcast information, thereby obtaining the transmission rate input from the transmission rate predicted value receiving unit 903. The new estimated transmission rate can be obtained by correcting the estimated rate. It should be noted that the transmission rate prediction value is not limited to the case where the transmission rate prediction value is divided by the number of users to obtain the transmission rate prediction value, but the transmission rate prediction value can be obtained using broadcast information such as the number of users by any method.
- FIG. 10 is a block diagram showing a configuration of the transmission rate prediction unit 108.
- Transmission rate prediction section 108 according to Embodiment 4 is different from transmission rate prediction section 108 according to Embodiment 1 shown in FIG. 3 in that user transmission rate prediction section 1001 is added as shown in FIG. I do. Note that, in FIG. 10, the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
- Offset adding section 303 multiplies the predicted value of the transmission rate by a predetermined constant from the information of the predicted value of the transmission rate input from transmission rate averaging section 302 to obtain the final predicted value of the transmission rate.
- the predicted transmission rate is output to modulation section 107 and user transmission rate prediction section 1001.
- User transmission rate predicting section 1001 determines the final transmission rate based on the transmission rate predicted value input from offset adding section 303 and the transmission rate predicted value information input from transmission rate predicted value information demodulating section 801. Find the predicted value. That is, the user transmission rate prediction unit 1001 performs the transmission rate prediction of the transmission rate prediction value information input from the transmission rate prediction value information demodulation unit 801 and the transmission rate prediction value of the transmission rate prediction value information input from the offset adding unit 303. The transmission rate ratio with the value is obtained, and the transmission rate ratio thus obtained is multiplied by the transmission rate prediction value input from the offset adding section 303 to obtain the final transmission rate prediction value. Then, the user transmission rate prediction unit 1001 transmits the information of the corrected transmission rate prediction value. Output to rate prediction control section 110.
- radio communication apparatus 800 and base station apparatus 900 Next, operations of radio communication apparatus 800 and base station apparatus 900 will be described using FIG. 8 and FIG.
- pilot CH demodulation section 104 demodulates a pilot signal input from RF transmission / reception section 102 and outputs the demodulated pilot signal to reception state measurement section 105.
- reception state measuring section 105 measures the SIR indicating the reception state using the pilot signal input from pilot CH demodulation section 104.
- transmission rate candidate selection section 106 selects a transmission rate candidate using the measured value of SIR.
- the transmission rate prediction unit 108 obtains a transmission rate prediction value by averaging the information of the transmission rate candidates after performing threshold processing, and stores the obtained transmission rate prediction value.
- modulation section 107 modulates a transmission signal including transmission rate candidate information and transmission rate prediction value information, and transmits the modulated signal from antenna 101 via RF transmission / reception section 102.
- the base station apparatus that has received the information on the transmission rate candidate and the information on the predicted transmission rate
- transmission rate predicted value receiving section 903 extracts information on a predicted transmission rate included in the received signal.
- the data transmission units 904-1-1 904-n temporarily store transmission data addressed to a plurality of wireless communication devices in service and output the data at a predetermined timing.
- the traffic monitoring unit 906 measures the traffic amount from the transmission data information input from the data transmission units 904-1 904-n.
- transmission rate predicted value information calculation section 907 obtains a transmission rate predicted value based on the transmission rate predicted value information and the traffic information.
- modulation section 905 modulates a transmission signal including transmission data and transmission rate prediction value information, and transmits the signal from antenna 901 via RF transmission / reception section 902.
- transmission rate predicted value information demodulating section 801 extracts the transmission rate predicted value information by demodulating the received signal.
- pilot CH demodulation section 104 demodulates a pilot signal input from RF transmission / reception section 102.
- reception state measuring section 105 measures the SIR indicating the reception state using the pilot signal.
- transmission rate candidate selection section 106 selects a transmission rate candidate using the SIR measurement value, and outputs information on the selected transmission rate candidate to transmission rate prediction section 108 and modulation section 107.
- transmission rate predicting section 108 obtains a transmission rate predicted value by averaging the information of the transmission rate candidates after threshold processing, and obtains the transmission rate inputted from transmission rate predicted value information demodulating section 801.
- the transmission rate ratio is determined by dividing the transmission rate predicted value corrected by the base station apparatus 900 from the predicted value information by the stored previously transmitted transmission rate predicted value.
- the transmission rate prediction unit 108 corrects the transmission rate prediction value by multiplying the obtained transmission rate prediction value by the obtained transmission rate prediction value to obtain the final transmission rate prediction value. Displays the estimated transmission rate.
- the transmission rate prediction value is calculated in consideration of the traffic amount. Can be requested.
- the base station device obtains the transmission rate prediction value in consideration of the traffic volume, and the wireless communication device measures the transmission rate prediction value information transmitted from the base station device and measures the transmission rate prediction value. Since an accurate transmission rate predicted value can be obtained only by making a correction in accordance with the difference from the calculated transmission rate predicted value, an accurate transmission rate predicted value can be obtained by simple processing. Further, according to the fourth embodiment, the circuit for calculating the transmission rate predicted value can be reduced in size because the processing for calculating the transmission rate predicted value is simple.
- the transmission rate predicted value is indicated by a numerical value.
- the present invention is not limited to this.
- the transmission rate predicted value is indicated by a non-numeric expression such as a color or a symbol.
- the transmission rate predicted value may be notified by voice from a speaker, or the user may be notified of the transmission rate predicted value using an arbitrary method.
- the transmission rate prediction value is displayed on the display unit of the wireless communication device.
- the present invention is not limited to this. Any display such as connecting the wireless communication device to a personal computer and displaying it on the screen of the personal computer is possible.
- the transmission rate prediction value can be displayed using the section.
- FIG. 11 is a block diagram showing a configuration of base station apparatus 1100 according to Embodiment 5 of the present invention.
- the base station apparatus 1100 according to Embodiment 5 is different from base station apparatus 900 according to Embodiment 4 shown in FIG. 9 in that reception state demodulation sections 1101-1-1-1101-n as shown in FIG. , An assignment unit 1102 and an assignment simulation unit 1103 are added.
- FIG. 11 the same components as those in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.
- the configuration of the wireless communication device is the same as that of FIG. 8, and a description thereof will be omitted.
- Transmission rate predicted value information extracting unit 903 which is a transmission rate predicted value information extracting unit, extracts information on the transmission rate predicted value included in the received signal and outputs the information to transmission rate predicted value information calculating unit 907.
- the transmission rate predicted value information extracted by the transmission rate predicted value receiving unit 903 is transmitted by the wireless communication device before the start of data communication.
- Reception state demodulation section 1101-1-1 1101-n demodulates and extracts the CQI in which each wireless communication device power is also reported from the reception signal input from RF transmission / reception section 902, and assigns the extracted CQI to allocation section 1102 and Output to the allocation simulation unit 1103.
- Allocation section 1102 has a reference table storing scheduling information that associates CQIs with modulation scheme information and the like as shown in FIG. 12, and includes reception state demodulation sections 1101-1-1 1101-n The modulation method and coding rate are determined using the input CQI. Further, allocating section 1102 performs scheduling, which is a process of selecting a wireless communication device to transmit packet data. Then, allocating section 1102 instructs modulating section 905 to perform adaptive modulation according to the determined modulation scheme, and also stores data transmitting section 904-1 904 storing packet data to be transmitted to the wireless communication apparatus allocated by scheduling. -Control to output packet data to n.
- Allocation simulating section 1103, which is a terminal allocation simulating means, has a reference table storing scheduling information associating CQI with modulation scheme information and the like as shown in FIG.
- the receiving state demodulation section 1101-11-11101-n uses the input CQI to determine the modulation method and the coding rate.
- the allocation simulation section 1103 selects a wireless communication apparatus to transmit packet data from, based on the CQI input from the reception state demodulation section 1101-1-1101-n and the traffic information input from the traffic monitoring section 906. And assigning packet data to all wireless communication devices, including the wireless communication device before data communication start and the wireless communication device performing data communication, so that they are within the specified resources. Ask for.
- the allocation simulation unit 1103 also inputs the CQI of each wireless communication device that is currently transmitting data, and thus can predict how often packet data can be allocated to each wireless communication device. Then, the allocation simulation section 1103 outputs information on the allocation frequency to which the packet data is allocated to the transmission rate predicted value information calculation section 907.
- Transmission rate predicted value information calculation section 907 is based on the transmission rate predicted value information input from transmission rate predicted value receiving section 903 and the information on the allocation frequency to which the packet data input from allocation simulation section 1103 is allocated. Then, the transmission rate prediction value is obtained, and the transmission rate prediction value information, which is information of the obtained transmission rate prediction value, is output to modulation section 905. That is, the transmission rate predicted value information calculation unit 907 obtains the transmission rate predicted value by multiplying the transmission rate predicted value by the allocation frequency from the information on the transmission rate predicted value transmitted from the wireless communication device.
- radio communication apparatus 800 and base station apparatus 1100 will be described using FIG. 8 and FIG.
- pilot CH demodulating section 104 demodulates a pilot signal input from RF transmitting / receiving section 102 and outputs the demodulated pilot signal to reception state measuring section 105.
- reception state measuring section 105 measures the SIR indicating the reception state using the pilot signal input from pilot CH demodulation section 104.
- transmission rate candidate selection section 106 selects a transmission rate candidate using the measured value of SIR.
- transmission rate predicting section 108 performs threshold processing on the information of the transmission rate candidates, and then averages to obtain a transmission rate prediction value.
- modulation section 107 modulates a transmission signal including transmission rate candidate information and transmission rate prediction value information, and transmits the modulated signal from antenna 101 via RF transmission / reception section 102.
- the base station apparatus that has received the information of the transmission rate candidate and the information of the transmission rate prediction value
- transmission rate predicted value receiving section 903 extracts information on the predicted transmission rate included in the received signal.
- data transmitting section 904-1 904-n temporarily accumulates transmission data addressed to each of a plurality of wireless communication devices in service and outputs the data at a predetermined timing.
- traffic monitoring section 906 measures the traffic amount from the transmission data information input from data transmission section 904-1-1 904-n.
- transmission rate predicted value information calculating section 907 obtains a transmission rate predicted value based on the transmission rate predicted value information and the traffic information.
- modulation section 905 modulates a transmission signal including transmission data and transmission rate prediction value information, and transmits the signal from antenna 901 via RF transmission / reception section 902.
- transmission rate predicted value receiving section 903 extracts information on the predicted transmission rate included in the received signal.
- allocation simulation section 1103 determines the modulation scheme, coding rate, and the like using CQI, and selects a wireless communication apparatus that transmits packet data from the CQI and traffic information. Do some scheduling.
- allocation simulation section 1103 obtains an allocation frequency at which packet data is allocated.
- transmission rate predicted value information calculation section 907 obtains a transmission rate predicted value based on the transmission rate predicted value information and information on the allocation frequency to which packet data is allocated.
- modulation section 905 modulates a transmission signal including transmission data and information on a predicted transmission rate, and transmits the modulated signal from antenna 901 via RF transmission / reception section 902.
- transmission rate predicted value information demodulation section 801 extracts the transmission rate predicted value information by demodulating the received signal.
- pilot CH demodulating section 104 demodulates a pilot signal input from RF transmitting / receiving section 102.
- reception state measuring section 105 measures the SIR indicating the reception state using the pilot signal.
- transmission rate candidate selection section 106 selects a transmission rate candidate using the measured value of SIR.
- the transmission rate prediction unit 108 calculates the transmission rate prediction value by averaging the information of the transmission rate candidates after performing threshold processing, and also calculates the transmission rate prediction value and the transmission rate prediction value information.
- the transmission rate prediction value is corrected based on the transmission rate prediction value information input from demodulation section 801.
- transmission rate prediction section 108 displays the calculated transmission rate prediction value.
- scheduling is performed using the SIRs of all wireless communication devices including the wireless communication device performing data communication. Then, the allocation frequency at which the packet data is allocated is obtained, and the transmission rate prediction value is obtained in consideration of the obtained allocation frequency, so that the transmission rate prediction value with high accuracy can be obtained.
- base station apparatus power scheduling is performed to obtain a transmission rate prediction value in consideration of an allocation frequency at which packet data is allocated, and the wireless communication apparatus is transmitted from the base station apparatus. By simply making corrections based on the information on the transmission rate prediction value and the transmission rate prediction value measured by the user, an accurate transmission rate prediction value can be obtained. Can be requested. Further, according to the fifth embodiment, since the processing for obtaining the transmission rate prediction value is simple, the circuit for obtaining the transmission rate prediction value can be downsized.
- the transmission rate predicted value is displayed by a numerical value.
- the present invention is not limited to this.
- the transmission rate predicted value is displayed by a non-numeric expression method such as a color or a symbol.
- the transmission rate predicted value may be notified by voice from a speaker, or the user may be notified of the transmission rate predicted value using an arbitrary method.
- the transmission rate prediction value is displayed on the display unit of the wireless communication device.
- the wireless communication device may be connected to a personal computer and displayed on the screen of the personal computer.
- the transmission rate prediction value can be displayed using an arbitrary display unit.
- FIG. 13 is a block diagram showing a configuration of radio communication apparatus 1300 according to Embodiment 6 of the present invention.
- Radio communication apparatus 1300 according to Embodiment 6 differs from radio communication apparatus 100 according to Embodiment 1 shown in FIG. 1 in that transmission rate measuring section 1301 is added as shown in FIG. In FIG. 13, parts having the same configuration as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- Transmission rate measuring section 1301 measures the transmission rate of the actually transmitted packet data, and outputs it to transmission rate estimating section 108.
- the actual measured transmission rate measured by the transmission rate measuring unit 1301 indicates the transmission rate during data communication, and can be obtained from the data amount of the actually transmitted packet data.
- Transmission rate predicting section 108 performs threshold processing on CQI input from transmission rate candidate selecting section 106, and then averages the CQI to obtain a transmission rate predicted value.
- the obtained transmission rate predicted value and transmission rate measuring section 1301 The transmission rate ratio between the estimated transmission rate value and the actual measured transmission rate is obtained from the information on the actual measured transmission rate input from.
- the transmission rate prediction unit 108 corrects the transmission rate prediction value input from the transmission rate candidate selection unit 106 based on the obtained transmission rate ratio, and transmits the corrected transmission rate prediction value to the transmission rate prediction control unit 110.
- FIG. 14 is a block diagram showing a configuration of the transmission rate prediction unit 108.
- Transmission rate prediction section 108 according to Embodiment 6 differs from transmission rate prediction section 108 according to Embodiment 1 shown in FIG. 3 in that a prediction difference calculation section 1401 is added.
- FIG. 14 portions having the same configuration as in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
- the offset adding unit 303 stores the previously stored offset value from the transmission rate ratio information between the transmission rate predicted value and the measured transmission rate input from the prediction difference calculation unit 1401. A new offset value is set by multiplying the offset value by the transmission rate ratio. Then, the offset adding section 303 receives the input from the transmission rate averaging section 302. The transmission rate prediction value is corrected by multiplying the averaged CQI by the offset value, and information on the corrected transmission rate prediction value is output to the transmission rate prediction control unit 110.
- Prediction difference calculation section 1401 calculates the transmission rate prediction value and the transmission rate based on the information on the transmission rate prediction value input from offset adding section 303 and the information on the actual transmission rate value input from transmission rate measurement section 1301. The transmission rate ratio with the measured value is obtained, and information on the obtained transmission rate ratio is output to offset adding section 303.
- the offset value is corrected using the transmission rate during data communication, and then the transmission rate prediction value is calculated. Since the offset value used in the calculation is sequentially corrected, the transmission rate prediction value can be calculated with high accuracy.
- the transmission rate predicted value is displayed by a numerical value.
- the present invention is not limited to this.
- the transmission rate predicted value is displayed by a non-numeric expression method such as a color or a symbol.
- the transmission rate predicted value may be notified by voice from a speaker, or the user may be notified of the transmission rate predicted value using an arbitrary method.
- the transmission rate prediction value is displayed on the display unit of the wireless communication device.
- the present invention is not limited to this. Any display such as connecting the wireless communication device to a personal computer and displaying it on the personal computer screen is possible.
- the transmission rate prediction value can be displayed using the section.
- FIG. 15 is a block diagram showing a configuration of wireless communication apparatus 1500 according to Embodiment 7 of the present invention.
- Radio communication apparatus 1500 according to Embodiment 7 is different from radio communication apparatus 100 according to Embodiment 1 shown in FIG. 1 in that key input determination section 1501 and service information amount as shown in FIG.
- An acquisition unit 1502, a service prediction completion time calculation unit 1503, and a display unit 1504 are added.
- FIG. 15 portions having the same configuration as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- the key input determination unit 1501 detects the presence or absence of a key input by the user to indicate a desire to receive the service and a key input by the user to specify a desired data acquisition completion time when receiving the desired service. If key input is detected, key input A signal to the effect is output to the service prediction completion time calculation unit 1503.
- the service information amount acquisition unit 1502 stores the information amounts of all the services that can be provided to the user, and the service information amount information is read from the service prediction completion time calculation unit 1503. In this case, the information of the information amount of each service is output to the service prediction completion time calculation unit 1503. Also, the service information amount acquisition unit 1502 acquires the information amount of data of different quality for each service.
- the service prediction completion time calculation unit 1503 which is data reception time calculation means, receives a key input signal from the key input determination unit 1501, and receives a transmission rate prediction value from the transmission rate prediction unit 108 And the service information amount acquisition unit 1502 also reads the information amount of each service. Then, the service prediction completion time calculation unit 1503 divides the information amount of each service by the transmission rate prediction value to calculate the reception time, which is the time from the start of data reception to the end of power data reception. The calculation is performed, and it is determined whether or not data acquisition is completed by the data acquisition completion time desired by the user input from the key input determination unit 1501.
- the service prediction completion time calculation unit 1503 does not store the service if the data acquisition is not completed by the time desired by the user, and does not store the service if the data acquisition is completed by the time desired by the user. Memorize the service.
- the service prediction completion time calculation unit 1503 stores the data type of the service stored as a service whose data acquisition is completed by the time desired by the user after the calculation of the data completion time for all services is completed.
- the information and reception time information such as the time required to receive the stored service data (predicted time) or the time when the reception of the stored service data ends is output to the display unit 1504.
- the service prediction completion time calculation unit 1503 selects the data from the data of different qualities of the same image by the data acquisition completion time desired by the user. Select quality data that can be obtained.
- the display unit 1504 displays the data type information and the reception time information input from the service prediction completion time calculation unit 1503 on a display such as a liquid crystal screen.
- FIG. 9 is a flowchart showing an operation of the line communication device 1500.
- Step ST1601 the user selects a service candidate by pressing a predetermined key of wireless communication apparatus 1500, and key input determination section 1501 compares service information selected by the user with service prediction completion time calculation section 1503.
- the user presses a predetermined key of wireless communication device 1500 to input a data acquisition completion time desired by the user when receiving the selected service.
- the information of the desired data acquisition completion time is output to the service prediction completion time calculation unit 1503 (step ST1602).
- reception state measurement section 105 measures the SIR from the received signal
- transmission rate candidate selection section 106 selects a CQI from the measured SIR
- transmission rate prediction section 108 averages the selected CQIs for a predetermined time. Then, a transmission rate prediction value is calculated (step ST1603).
- the service prediction completion time calculation unit 1503 obtains the information amount and the transmission rate prediction value information of the service selected by the user, and calculates the prediction time.
- the service prediction completion time calculation unit 1503 determines whether the result of adding the current time and the calculated prediction time is smaller than the data acquisition completion time (threshold, value) (data by the data acquisition completion time). Judge whether acquisition is completed).
- the service prediction completion time calculation unit 1503 stores the service when the result of adding the current time and the calculated prediction time is smaller than the data acquisition completion time, and adds the current time and the calculated prediction time. If the result is not less than the data acquisition completion time, the service is not stored.
- Service prediction completion time calculation section 1503 performs these processes for all services selected by the user (step ST1604).
- the service prediction completion time calculation unit 1503 displays only the stored service on the display unit.
- FIG. 17 shows a state in which a service capable of completing data acquisition by the data acquisition completion time desired by the user and a predicted completion time are displayed on the display unit 1504. As shown in FIG. 17, the user can select a desired service from among the displayed services.
- the user By inputting the desired service and the desired data acquisition completion time to the wireless communication device, a list of services that can complete data acquisition by the desired data acquisition completion time is displayed. A desired service can be selected while observing the data acquisition completion time, and an extremely convenient wireless communication device can be provided.
- the ability to display only the services that satisfy the data acquisition completion time desired by the user is not limited to this. All services selected by the user and the user The data acquisition completion time of all the selected services may be displayed. Further, in the seventh embodiment, the data type and the reception time information are displayed by characters and numerical values. However, the present invention is not limited to this, and the data type and the reception time information may be expressed by characters such as colors or symbols. The data type and the reception time information may be indicated by a method other than a numerical value, the speaker may notify the data type and the reception time information by voice, or the user may be notified of the data type and the reception time information by an arbitrary method. be able to.
- the data type and the reception time information are displayed on the display unit of the wireless communication device.
- the wireless communication device may be connected to a personal computer and displayed on the screen of the personal computer.
- the data type and the reception time information can be displayed using an arbitrary display unit.
- Information indicating an arbitrary transmission rate such as MCS may be used. it can.
- CQI is determined by a calculation formula.However, the present invention is not limited to this, and CQI selection information relating CQI to a measured value indicating reception quality such as SIR is used.
- a CQI may be selected using a measured SIR by storing a reference table for storing the CQI.
- the wireless communication apparatus according to Embodiment 1 to Embodiment 7 can be applied to a communication terminal apparatus.
- the present invention is suitable for application to a wireless communication device, a base station device, and a communication terminal device that predict a transmission rate.
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
- Communication Control (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
Claims
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US10/547,764 US7406036B2 (en) | 2003-11-20 | 2004-11-14 | Radio communication apparatus, base station apparatus, communication terminal apparatus and transmission rate predicting method |
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JP2003390767A JP4088243B2 (ja) | 2003-11-20 | 2003-11-20 | 無線通信装置及び伝送レート予測方法 |
JP2003-390767 | 2003-11-20 |
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CN101395947B (zh) * | 2006-03-01 | 2012-11-14 | 日本电气株式会社 | 移动体通信系统、基站、移动机、通知方法、程序及记录介质 |
JP2007325142A (ja) * | 2006-06-05 | 2007-12-13 | Sony Corp | 通信システム、受信装置、送信モード提案方法およびプログラム |
JP2008085513A (ja) * | 2006-09-27 | 2008-04-10 | Nec Corp | 無線通信端末及びそれに用いるアンテナバー表示方法並びにそのプログラム |
CN102739602B (zh) | 2007-08-14 | 2016-03-16 | 株式会社Ntt都科摩 | 接收装置和数据取得方法 |
JP5212051B2 (ja) * | 2008-11-28 | 2013-06-19 | 富士通モバイルコミュニケーションズ株式会社 | 移動通信端末及び基地局切替方法 |
US8594688B2 (en) * | 2009-12-09 | 2013-11-26 | Qualcomm Incorporated | Method and system for rate prediction in coordinated multi-point transmission |
JP5494045B2 (ja) * | 2010-03-12 | 2014-05-14 | 富士通モバイルコミュニケーションズ株式会社 | 移動体通信端末および通信品質表示方法 |
CN103220073A (zh) | 2012-01-20 | 2013-07-24 | 中兴通讯股份有限公司 | 下行解调导频控制信令的通知及接收方法、基站及终端 |
JP5920111B2 (ja) * | 2012-08-24 | 2016-05-18 | 富士通株式会社 | 通信制御装置、通信システム及び通信方法 |
KR102372488B1 (ko) * | 2015-05-29 | 2022-03-10 | 삼성전자 주식회사 | 무선 패킷 네트워크를 위한 스케줄링 방법 및 장치 |
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