WO2004045176A1 - 無線通信システム及び無線通信方法 - Google Patents
無線通信システム及び無線通信方法 Download PDFInfo
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- WO2004045176A1 WO2004045176A1 PCT/JP2003/014330 JP0314330W WO2004045176A1 WO 2004045176 A1 WO2004045176 A1 WO 2004045176A1 JP 0314330 W JP0314330 W JP 0314330W WO 2004045176 A1 WO2004045176 A1 WO 2004045176A1
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- Prior art keywords
- wireless communication
- communication device
- reference signal
- known reference
- insertion interval
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/021—Estimation of channel covariance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
Definitions
- the present invention relates to a wireless communication system and a wireless communication method.
- the present invention relates to a wireless communication system and a wireless communication method.
- the present invention relates to a wireless communication system and a wireless communication method capable of improving throughput.
- Non-Patent Document 1 is a standard in wireless LAN (Local Area Network).
- Non-Patent Document 1 transmit transmission request information for requesting data transmission from a transmitting side to a receiving side at a pre-communication stage.
- the data transmission is started by transmitting reception preparation completion information, which is a response to the transmission request information, to the transmission side.
- reception preparation completion information which is a response to the transmission request information
- the receiving side can confirm data reception by transmitting reception confirmation information.
- synchronous detection such as 16 QAM (quadrature amplitude modulation) and 64 QAM is required to improve transmission speed. Is applied.
- a known reference signal also called a pilot symbol or a pilot signal
- a complex baseband is inserted on the receiving side.
- amplitude and phase fluctuation compensation is performed based on pilot symbols received from the transmitting side.
- Japanese Patent Application No. 2002-1992 227 (which has not been disclosed and is not publicly known and does not itself constitute a conventional technology).
- this technology for example, by continuously transmitting data, the non-signal section between data (between frames) is reduced, the header is reduced or replaced with data having a smaller capacity, and the header capacity is reduced. For example, it is possible to improve the communication throughput by reducing the traffic.
- Non-Patent Document 1 IEEE standard 802.11 ,. '"Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,” IEEE, Inc., New York 1997
- Patent Literature 1 Japanese Patent Application Laid-Open No. 2000-3393963 (Claim 6, Paragraph 063, 064)
- the insertion interval of the pilot signal is fixedly determined and is always constant regardless of the transmission path environment between the transmission side and the reception side. Therefore, if the insertion interval of the pilot signal is to be variable, the pilot signal insertion interval may be It is necessary to make an agreement on such a situation, but there is no wireless communication system that can actually make such an agreement. Also, for example, in communication standards such as the wireless communication standard described in Non-Patent Document 1, it is possible to transmit other information together with information such as transmission request information, reception preparation completion information, and reception confirmation information. No possible communication standards currently exist. Disclosure of the invention
- the present invention provides a wireless communication system and a wireless communication system capable of improving the throughput of communication by making an agreement between the wireless communication devices to make the insertion interval of the pilot signal variable.
- the purpose is to provide a communication method.
- a wireless communication system of the present invention includes a transmitting wireless communication device and a receiving wireless communication device, and is transmitted from the transmitting wireless communication device to the receiving wireless communication device via a transmission path.
- a wireless communication system in which the insertion interval of a known reference signal to be inserted into data is variable, wherein a transmission-side wireless communication device can determine an insertion interval of a known reference signal.
- a wireless communication system of the present invention includes a transmitting wireless communication device and a receiving wireless communication device, and includes a transmitting wireless communication device.
- a wireless communication system in which the insertion interval of a known reference signal inserted into data transmitted from a transmitting device to a receiving wireless communication device via a transmission path is variable, wherein the transmitting wireless communication device is a known reference signal.
- Notification means for notifying that transmission is possible, and when the transmission-side wireless communication device receives reception preparation completion information, which is a response to the transmission request information, from the reception-side wireless communication device, the insertion interval of the known reference signal Is determined, and the data in which the known reference signal is inserted is transmitted to the receiving wireless communication apparatus based on the determined insertion interval of the known reference signal.
- the transmission-side wireless communication apparatus inputs the known reference signal to be inserted into the data at the reception timing of the reception preparation completion information immediately before transmitting the data from the transmission-side wireless communication apparatus to the reception-side wireless communication apparatus.
- the interval can be determined, and the communication throughput can be improved by performing communication based on the input interval of the known reference signal.
- the transmitting-side wireless communication apparatus refers to an information signal related to the reception preparation completion information received from the receiving-side wireless communication apparatus, and determines an optimum known signal in data transmission. It is configured to determine an input interval of the reference signal.
- the transmitting wireless communication device refers to the information signal related to the reception preparation completion information immediately before transmitting data from the transmitting wireless communication device to the receiving wireless communication device, and enters the data. It is possible to determine the insertion interval of the reference signal.
- a wireless communication system of the present invention includes a transmitting-side wireless communication device and a receiving-side wireless communication device, and transmits from the transmitting-side wireless communication device to the receiving-side wireless communication device via a transmission path.
- a wireless communication system in which an insertion interval of a known reference signal to be inserted is variable, wherein a transmitting-side wireless communication device includes a known reference signal insertion interval determining unit capable of determining an insertion interval of a known reference signal.
- the transmitting wireless communication device transmits data different from the data to the receiving wireless communication device before transmitting the data, and indicates that the reception of the different data from the receiving wireless communication device is completed.
- the transmitting wireless communication device determines the insertion interval of the known reference signal, and transmits the data with the known reference signal inserted based on the determined insertion interval of the known reference signal. It is configured to transmit to the device.
- the transmission-side wireless communication apparatus transmits the known reference signal to the data at the reception timing of the reception confirmation information received immediately before transmitting the data from the transmission-side wireless communication apparatus to the reception-side wireless communication apparatus. It is possible to determine the insertion interval, and it is possible to improve the communication throughput by performing communication at the insertion interval of the known reference signal.
- the transmitting-side wireless communication device refers to the information signal related to the reception confirmation information received from the receiving-side wireless communication device and transmits the information to the receiving-side wireless communication device. It is configured to determine an optimal insertion interval of the known reference signal in transmitting data.
- the transmitting wireless communication device refers to the information signal related to the reception confirmation information immediately before transmitting data from the transmitting wireless communication device to the receiving wireless communication device, and inserts the known reference signal into the data. This makes it possible to determine the insertion interval of the vehicle.
- a wireless communication system of the present invention includes a transmitting-side wireless communication device and a receiving-side wireless communication device, and transmits from the transmitting-side wireless communication device to the receiving-side wireless communication device via a transmission path.
- the transmitting wireless communication apparatus has a known reference signal insertion interval determining unit capable of determining an insertion interval of the known reference signal, and the transmitting wireless communication apparatus can transmit an arbitrary wireless signal from the receiving wireless communication apparatus. It is configured to receive an information signal transmitted to a communication device, and to determine an optimal insertion interval of a known reference signal in transmitting data to a receiving wireless communication device with reference to the received information signal. ing.
- the transmission-side wireless communication apparatus refers to the information signal received before transmitting data from the transmission-side wireless communication apparatus to the reception-side wireless communication apparatus, and inserts a known reference signal into the data at an insertion interval. Can be determined, and by performing communication based on the insertion interval of the known reference signal, it is possible to improve the throughput of communication.
- a wireless communication system of the present invention includes a transmitting-side wireless communication device and a receiving-side wireless communication device, and transmits from the transmitting-side wireless communication device to the receiving-side wireless communication device via a transmission path.
- a wireless communication system of the present invention includes a transmitting-side wireless communication device and a receiving-side wireless communication device, and transmits from the transmitting-side wireless communication device to the receiving-side wireless communication device via a transmission path.
- the transmitting wireless communication device performs known reference to the receiving wireless communication device together with data transmission request information before data transmission.
- a transmitting means for transmitting information requesting a signal insertion interval, wherein the receiving-side wireless communication device is capable of determining an insertion interval of the known reference signal;
- a notification means for notifying the transmitting wireless communication device of the insertion interval of the known reference signal determined by the known reference signal insertion interval determining means before transmitting the data, wherein the transmitting wireless communication device Before transmitting the data, the information requesting the insertion interval of the known reference signal is transmitted to the receiving wireless communication device together with the data transmission request information, and the receiving wireless communication device determines the input interval of the known reference signal.
- the transmitting-side wireless communication device is notified of the determined insertion interval of the known reference signal, and the transmitting-side wireless communication device is notified of the data based on the insertion interval of the known reference signal notified from the receiving-side wireless communication device. It is configured to receive a reference signal and transmit the reference signal to the receiving-side wireless communication device.
- the transmitting-side wireless communication device when the transmitting-side wireless communication device cannot determine the optimal insertion interval of the known reference signal, the transmitting-side wireless communication device makes a determination request to the receiving-side wireless communication device.
- the insertion interval of the known reference signal to be inserted into the data can be determined and notified.
- the communication throughput can be improved by performing the communication at the insertion interval of the communication.
- the reception-side wireless communication apparatus is an information signal relating to transmission request information of data received from the transmission-side wireless communication apparatus and information for requesting an insertion interval of a known reference signal.
- an optimal known reference signal insertion interval in data transmission is determined.
- the receiving-side wireless communication apparatus can transmit the data immediately before transmitting data from the transmitting-side wireless communication apparatus to the receiving-side wireless communication apparatus and the information relating to the information requesting the insertion interval of the known reference signal.
- the signal it is possible to determine the insertion interval of the known reference signal to be input to the data.
- a waterless communication system of the present invention includes a transmitting-side wireless communication device and a receiving-side wireless communication device, and a transmission path from the transmitting-side wireless communication device to the receiving-side wireless communication device.
- a wireless communication system in which the insertion interval of a known reference signal inserted into data transmitted via a wireless communication device is variable, and the receiving-side wireless communication device can determine the insertion interval of a known reference signal A known reference signal insertion interval determination unit is provided.
- the transmitting wireless communication apparatus transmits data different from the data to the receiving wireless communication apparatus before transmitting the data
- the receiving wireless communication apparatus The reference signal insertion interval is determined, the determined insertion interval of the known reference signal is notified to the transmitting wireless communication device, and the transmitting wireless communication device is notified of the known reference notified by the receiving wireless communication device.
- Faith On the basis on the insertion interval it is configured to transmit to the receiving wireless communication device by ⁇ the known reference signal to the data.
- the transmitting-side wireless communication device when the transmitting-side wireless communication device cannot determine the optimal insertion interval of the known reference signal, the transmitting-side wireless communication device makes a determination request to the receiving-side wireless communication device.
- the insertion interval of the known reference signal to be inserted into the data is determined, and this insertion interval can be notified together with the reception confirmation information. Communication based on the insertion interval of the known reference signal can be performed. By doing so, it is possible to improve the communication throughput.
- the receiving-side wireless communication device refers to an information signal regarding different data received from the transmitting-side wireless communication device and transmits data to the receiving-side wireless communication device.
- the best in sending It is configured to determine an insertion interval of a known reference signal.
- the transmission-side wireless communication device refers to the information signal related to the reception confirmation information immediately before transmitting the data from the transmission-side wireless communication device to the reception-side wireless communication device, and enters a known reference into the data. It becomes possible to determine the signal insertion interval and notify.
- a wireless communication system of the present invention includes a transmitting-side wireless communication device and a receiving-side wireless communication device, and transmits from the transmitting-side wireless communication device to the receiving-side wireless communication device via a transmission path.
- a wireless communication system in which the insertion interval of a known reference signal inserted into data to be transmitted is variable, and a known reference capable of determining the insertion interval of a known reference signal by a receiving wireless communication device. It has signal insertion interval determination means, and the receiving wireless communication device receives an information signal transmitted from the transmitting wireless communication device to an arbitrary wireless communication device, and refers to the received information signal for known reference.
- the signal insertion interval is determined, the determined insertion interval of the known reference signal is notified to the transmitting wireless communication device, and the transmitting wireless communication device transmits the known reference signal notified from the receiving wireless communication device. Based on the insertion interval, it is configured to transmit a known reference signal to the data receiving side wireless communications device and ⁇ .
- the receiving wireless communication device refers to the information signal received before transmitting data from the transmitting wireless communication device to the receiving wireless communication device, and determines the insertion interval of the known reference signal to be inserted into the data. It is possible to determine and notify, and by performing communication at the insertion interval of the known reference signal, it is possible to improve the communication throughput.
- a wireless communication system of the present invention comprises a transmitting wireless communication device and a receiving wireless communication device, and performs communication between the transmitting wireless communication device and the receiving wireless communication device.
- a wireless communication system in which the insertion interval of a known reference signal inserted into data to be transmitted is variable,
- the transmitting-side wireless communication device and the receiving-side wireless communication device have a known reference signal insertion interval acquiring unit capable of acquiring an insertion interval of the known reference signal.
- the insertion interval of the known reference signal inserted into the data is determined using the insertion interval and the insertion interval of the known reference signal acquired by the receiving-side wireless communication device.
- the insertion interval of the known reference signal in both the transmitting wireless communication device and the receiving wireless communication device.
- one of the two known reference signals and the two known reference signals can be determined.
- Calculation and selection of the average of the reference signal can be performed, and the insertion interval of the known reference signal can be determined with better accuracy.
- a wireless communication system includes a plurality of wireless communication devices and a communication management device capable of communicating with the plurality of wireless communication devices.
- a wireless communication system in which the insertion interval of a known reference signal inserted into data transmitted in communication with a wireless communication device is variable, wherein the communication management device is configured to communicate with each of the plurality of wireless communication devices.
- a known reference signal insertion interval determining means capable of determining an optimal insertion interval of a known reference signal; and an optimal known reference signal insertion interval in a transmission path with each of a plurality of wireless communication devices.
- Storage means capable of storing.
- the communication management device calculates the optimal insertion interval of the known reference signal for each communication of the plurality of wireless communication devices, and the communication management device can centrally manage and store the information.
- a wireless communication system includes a plurality of wireless communication devices and a communication management device capable of communicating with the plurality of wireless communication devices. Communication with A wireless communication system in which the insertion interval of the known reference signal inserted into the data transmitted by the wireless communication device is variable, wherein each of the plurality of wireless communication devices is an optimal known reference signal in communication with the communication management device.
- a known reference signal insertion interval determining means capable of determining an insertion interval of the known reference signal
- a storing means capable of storing an optimal known reference signal insertion interval in a transmission path with the communication management device.
- each of the plurality of wireless communication devices can calculate the insertion interval of the known reference signal that is optimal for communication with the communication management device, and manage and store the insertion interval in each wireless communication device.
- each of the plurality of wireless communication devices refers to a notification signal that the communication management device reports to any wireless communication device, and communicates with the communication management device. It is configured to determine the optimal insertion interval of the known reference signal in the transmission path.
- the known reference signal insertion interval determining means refers to a time variation of a transmission path response and inputs a known reference signal that is optimal when transmitting data. It is configured to calculate intervals.
- a wireless communication method according to the present invention is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- a wireless communication method for making an insertion interval of a known reference signal inserted into data transmitted as a transmission variable wherein a transmitting-side wireless communication apparatus determines an insertion interval of a known reference signal; The wireless communication device inserts the known reference signal into the data based on the determined insertion interval of the known reference signal, and transmits the data to the receiving-side wireless communication device.
- a wireless communication method is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- a wireless communication method in which an insertion interval of a known reference signal inserted into data transmitted to a device via a transmission path is variable, wherein a transmitting wireless communication device performs a receiving wireless communication before transmitting data.
- the transmitting wireless communication apparatus determines the insertion interval of the known reference signal to be inserted into the data at the reception timing of the reception ready information immediately before transmitting the data from the transmitting wireless communication apparatus to the receiving wireless communication apparatus. It is possible to perform communication based on the insertion interval of the known reference signal. It is possible to improve the throughput.
- the transmitting-side wireless communication device refers to an information signal related to the reception preparation completion information received from the receiving-side wireless communication device and determines an optimal known signal in data transmission. Determining a reference signal insertion interval.
- the transmitting wireless communication apparatus to refer to the information signal related to the reception preparation completion information immediately before transmitting data from the transmitting wireless communication apparatus to the receiving wireless communication apparatus, and generate a known reference signal to be inserted into the data.
- the import interval can be determined.
- a wireless communication method is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- What is claimed is: 1. A wireless communication method in which an insertion interval of a known reference signal inserted into data transmitted to a device via a transmission path is variable, wherein a transmitting wireless communication device performs a receiving wireless communication before transmitting data.
- the transmitting wireless communication device determines the insertion interval of the known reference signal;
- Communication device known reference signal based on the ⁇ interval determined known reference signal and a step of transmitting the data inserted into the receiving wireless communication device.
- the transmitting wireless communication apparatus to input a known reference signal to be inserted into the data at the reception timing of the reception confirmation information received immediately before transmitting the data from the transmitting wireless communication apparatus to the receiving wireless communication apparatus. It is possible to determine the interval, and by performing communication based on the insertion interval of the known reference signal, It is possible to improve communication throughput.
- the transmitting-side wireless communication device refers to the information signal related to the reception confirmation information received from the receiving-side wireless communication device and transmits the information to the receiving-side wireless communication device.
- the method further includes a step of determining an optimal insertion interval of the known reference signal in transmitting data.
- the interval can be determined.
- a wireless communication method is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- a wireless communication method for varying the insertion interval of a known reference signal inserted into data transmitted via a transmission path from a wireless communication device to a receiving wireless communication device comprising: Receiving an information signal transmitted from the wireless communication device to an arbitrary wireless communication device, and the transmitting wireless communication device refers to the received information signal to transmit the data to the receiving wireless communication device. Determining the insertion interval of the reference signal.
- the transmitting wireless communication apparatus to refer to the information signal received before transmitting data from the transmitting wireless communication apparatus to the receiving wireless communication apparatus, and to determine the insertion interval of the known reference signal to be inserted into the data. Can be determined, and by performing communication based on the insertion interval of the known reference signal, it is possible to improve the throughput of communication.
- a wireless communication method is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device. From the receiver wireless communication A wireless communication method in which an insertion interval of a known reference signal inserted into data transmitted to a device via a transmission path is variable, wherein a receiving-side wireless communication device determines an insertion interval of a known reference signal. And a step in which the receiving-side wireless communication device notifies the transmitting-side wireless communication device of the determined insertion interval of the known reference signal before transmitting the data.
- a wireless communication method according to the present invention is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- a wireless communication method in which the insertion interval of a known reference signal inserted into data transmitted via a transmission path from a wireless communication device to a receiving wireless device is variable, wherein the transmitting wireless communication device Transmitting the information requesting the insertion interval of the known reference signal together with the data transmission request information to the receiving side wireless communication device; and the information requesting the insertion interval of the known reference signal by the receiving side wireless communication device.
- the transmitting-side wireless communication device inserts the known reference signal into the data based on the insertion interval of the known reference signal notified from the receiving-side wireless communication device, and transmits the data to the receiving-side wireless communication device. And steps.
- the transmission-side wireless communication device issues a request to the reception-side wireless communication device for determination. Insertion into data at the reception timing of transmission request information and information requesting the insertion interval of known reference signals It is possible to determine and notify the input interval of the known reference signal, and to perform communication based on the input interval of the known reference signal, thereby improving the communication throughput.
- the receiving-side wireless communication device includes information relating to transmission request information of data received from the transmitting-side wireless communication device and information requesting an insertion interval of a known reference signal.
- the receiving wireless communication device to refer to the data transmission request information immediately before transmitting data from the transmitting wireless communication device to the receiving wireless communication device and the information signal related to the information requesting the insertion interval of the known reference signal. As a result, it becomes possible to determine the insertion interval of the known reference signal to be inserted into the data.
- a wireless communication method is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- a wireless communication method in which an insertion interval of a known reference signal inserted into data transmitted to a device via a transmission path is variable, wherein a transmitting wireless communication device performs a receiving wireless communication before transmitting data.
- a step of transmitting data known reference signal is ⁇ based on ⁇ interval notified known reference signal from the signal-side radio communication apparatus to the reception side radio communication apparatus.
- the transmitting wireless communication device to, for example, When the insertion interval cannot be determined, a request for determination is made to the receiving wireless communication device, and the receiving wireless communication device determines the insertion interval of the known reference signal to be inserted into the data at an arbitrary data reception timing.
- the receiving wireless communication device determines the insertion interval of the known reference signal to be inserted into the data at an arbitrary data reception timing.
- the receiving-side wireless communication device refers to an information signal regarding different data received from the transmitting-side wireless communication device, and transmits the data to the receiving-side wireless communication device. And determining the optimal insertion interval of the known reference signal in the transmission.
- the transmitting wireless communication apparatus to insert a known reference signal inserted into the data by referring to the information signal related to the reception confirmation information immediately before transmitting the data from the transmitting wireless communication apparatus to the receiving wireless communication apparatus. It will be possible to determine the interval and notify.
- a wireless communication method is used in a wireless communication system including a transmitting wireless communication device and a receiving wireless communication device.
- the receiving wireless communication apparatus refers to the information signal received before transmitting data from the transmitting wireless communication apparatus to the receiving wireless communication apparatus, and inputs the known reference signal to be input to the data.
- the interval can be determined and notified, and by performing communication at the interval of inputting the known reference signal, it is possible to improve communication throughput.
- a wireless communication method is used in a wireless communication system including a transmitting-side wireless communication device and a receiving-side wireless communication device.
- a wireless communication method in which an insertion interval of a known reference signal inserted into data transmitted in communication with a communication device is variable, wherein a transmission-side wireless communication device and a reception-side wireless communication device have a known reference.
- the device determines the insertion interval of the known reference signal to be inserted into the data using the insertion interval of the known reference signal acquired by each of the transmitting wireless communication device and the receiving wireless communication device. Tsu and a flop.
- both the transmitting wireless communication apparatus and the receiving wireless communication apparatus can determine the insertion interval of the known reference signal. For example, one of the two known reference signals and the two known reference signals can be determined. Calculation and selection of the average of the reference signal and the like can be performed, and the insertion interval of the known reference signal can be determined with better accuracy.
- a wireless communication method is used in a wireless communication system including a plurality of wireless communication devices and a communication management device capable of communicating with the plurality of wireless communication devices.
- a wireless communication method is used in a wireless communication system including a plurality of wireless communication devices and a communication management device capable of communicating with the plurality of wireless communication devices.
- What is claimed is: 1. A wireless communication method in which an insertion interval of a known reference signal inserted into data transmitted in communication between each communication device and a communication management device is variable, wherein each of the plurality of wireless communication devices is Determining the optimal known reference signal insertion interval in communication with the communication management device; and storing the optimal known reference signal insertion interval in the transmission path with the communication management device. I have. With this, it becomes possible for each of the plurality of wireless communication devices to calculate the insertion interval of the known reference signal optimal for communication with the communication management device, and to manage and store the interval at each wireless communication device.
- each of the plurality of wireless communication devices refers to a notification signal that the communication management device reports to any wireless communication device, and communicates with the communication management device.
- the method further includes a step of determining an insertion interval of the known reference signal that is optimal in the transmission path.
- the known reference signal A step of calculating an insertion interval of a known reference signal that is optimal when transmitting data by referring to a time variation amount of a transmission path response at the time of the insertion interval.
- FIG. 1 is a block diagram showing an example of an internal configuration of a wireless communication device which is a component of the wireless communication system according to the first embodiment of the present invention.
- FIG. 2A is a schematic diagram showing a format of transmission data when transmission data is packetized (divided) into a predetermined capacity in the wireless communication system according to the first embodiment of the present invention
- FIG. 2B is a schematic diagram showing a format of transmission data that is not packetized and transmitted as continuous data in the wireless communication system according to the first embodiment of the present invention
- FIG. 3 is a sequence chart showing processing and transmission data in the wireless communication system according to the first embodiment of the present invention
- FIG. 4 is a sequence chart showing a process for changing the insertion interval of a pilot signal in each data transmission and transmission data in the wireless communication system according to the first embodiment of the present invention
- FIG. 5 is a sequence chart showing processing for changing the insertion interval of a pilot signal based on an arbitrary signal and transmission data in the wireless communication system according to the first embodiment of the present invention
- FIG. 6 is a sequence chart showing processing and transmission data in the wireless communication system according to the second embodiment of the present invention
- FIG. 77 shows a wireless communication line according to a twenty-second embodiment of the present invention.
- FIG. 88 shows an optional 55 signal in the wireless communication system according to the twenty-second embodiment of the present invention.
- FIG. 99 is a diagram showing processing and transmission in a wireless communication system according to a thirty-third embodiment of the present invention. , Which indicates the data,
- FIG. 1100 shows each 1100 data transmission data in the wireless communication system according to the thirty-third embodiment of the present invention. In order to make the interval between the input and output signals of the papaya output signal variable, the transmission and transmission data are shown. Eleven Toto,
- FIG. 11 11 is a diagram showing an integrated processing type in the wireless communication system according to the forty-fourth embodiment of the present invention. , Which indicates the processing and transmission data of the
- FIG. 1122 is a diagram showing a 1155 dispersion processing in the wireless communication system according to the forty-fourth embodiment of the present invention. This is a sequence number indicating the processing of the type and the transmission data. . The best form to carry out the invention
- FIG. 11 is a diagram showing a wireless communication which is a constituent element of a wireless communication system according to an eleventh embodiment of the present invention.
- FIG. 2 is a block diagram showing an example of an internal configuration of a line communication communication device. . ''
- the wireless communication communication device 11 00 00 shown in FIG. 11 is composed of a reception / reception signal RR FF section 11, a demodulation / demodulation section 22, a pawaii It comprises a signal signal insertion / insertion interval interval acquisition / acquisition unit 33, 2255 transmission / transmission unit 44, and transmission / transmission RR FF unit 55. .
- the reception / reception RR FF section 11 converts the wireless signal received and received from the transmission line by the antenna 99
- the signal is converted into a signal that can be processed by the physical layer, and the converted signal is supplied to the demodulation unit 2 and the pilot signal insertion interval acquisition unit 3.
- the demodulation unit 2 demodulates the signal supplied from the reception RF unit 1 and outputs the demodulated signal to the upper layer as reception data.
- the pilot signal insertion interval acquisition unit 3 calculates the insertion interval of the optimal pilot signal (known reference signal, also called pilot symbol), or inserts the pilot signal from the upper layer. By supplying the interval, it is possible to obtain (determine) the input interval of the pilot signal.
- the pilot signal input interval acquisition unit 3 detects the moving speed of the wireless communication device 100 using, for example, a GPS signal, and inserts a pilot signal most suitable for the moving speed. Using the interval calculation function and the signal supplied from the reception RF unit 1, detect the time variation of the transmission path response, and calculate the optimal insertion interval of the pilot signal based on the detection result.
- the pilot signal insertion interval acquisition unit 3 can also acquire the insertion interval of the pilot signal, and the pilot signal calculated or acquired by the upper application can be obtained. It is also possible to be able to acquire the input interval of the signal.
- the information on the insertion interval of the pilot signal acquired by the pilot signal insertion interval acquisition unit 3 is information indicating the insertion interval of the pilot signal or transmission data. This is supplied to the transmission unit 4 as.
- information relating to the pilot signal insertion interval is supplied from the pilot signal input interval acquisition unit 3 to the transmission unit 4 as information indicating the pilot signal insertion interval, transmission is performed.
- processing for inserting a pilot signal into transmission data and other transmission processing are performed in accordance with the pilot signal insertion interval.
- the transmitting unit 4 handles the information relating to the input interval of the pilot signal as transmission data.
- the transmitting unit 4 converts the information related to the pilot signal input interval acquired by the pilot signal input interval acquiring unit 3 into information indicating the pilot signal insertion interval and less transmission data. Both can be used as one or both.
- the transmission RF unit 5 converts the data processed and output by the transmission unit 4 into a radio signal, and transmits the radio signal from the antenna 9 to the transmission path.
- the wireless communication device 100 shown in FIG. 1 obtains the insertion interval of the pilot signal, inserts the pilot signal into the transmission data according to the obtained insertion interval of the pilot signal, It is possible to transmit the insertion interval of the acquired pilot signal as transmission data and to notify the receiving wireless communication device receiving the transmission data of the insertion interval of the pilot signal.
- the pilot signal input interval can be expressed as time or data amount.
- FIGS. 2A and 2B are schematic diagrams showing the format of transmission data in the wireless communication system according to the first embodiment of the present invention.
- Fig. 2A is a schematic diagram showing the format of transmission data when the transmission data is packetized (divided) into a predetermined capacity
- Fig. 2B is a series of data that is not packetized and is continuous.
- FIG. 3 is a schematic diagram showing a format of transmission data transmitted as a transmission.
- the pilot signals are arranged at predetermined intervals (intervals between the pilots). Note that the pilot signal input interval.
- the pilot signal insertion interval is arbitrary (or an insertion interval determined by another method).
- the information related to the insertion interval of the pilot signal is inserted in the portion (payload portion) described as “data” in FIG. 2B.
- FIG. 3 is a sequence chart showing processing and transmission data in the wireless communication system according to the first embodiment of the present invention.
- FIG. 3 is a sequence chart of a wireless communication system having two wireless communication devices, and illustrates processing in each of the two wireless communication devices and transmission data transmitted between the two wireless communication devices. I have. In Fig. 3, the passage of time is shown from top to bottom.
- one wireless communication device transmitting side: SRC (Source) 101 shown in FIG. 3
- DEST (Destination) 102 shown in FIG. 3 receives data from the other wireless communication device. Therefore, when data is transmitted, a flow of a process for determining a pilot signal input interval is illustrated, and the SRC 101 has an internal configuration of the wireless communication apparatus 100 shown in FIG. are doing.
- the SRC 101 sends the transmission request information requesting data transmission (“transmission request” shown in FIG. 3) and information indicating that the insertion interval of the pilot signal can be acquired (see FIG. 3). (“Acquireable”) is transmitted (transmission: step S111). DEST 102 receives “transmission request” and “acceptable” information (reception: step S 112), and receives a response to the transmission request information indicating that the data is ready to be received. Transmit the preparation completion information (“preparation completed” shown in FIG. 3 ) (transmission: step S113).
- the SRC 101 receives the reception ready information (reception: step S114), and calculates an optimal pilot signal insertion interval from the received reception ready information or uses another method. Or by doing The insertion interval of the pilot signal is acquired (acquisition of the insertion interval: step S115), and the pilot signal is inserted into the transmission data and transmitted based on the insertion interval of the pilot signal (data transmission: Step S1 16).
- the data transmitted in step S116 has a pilot signal insertion interval determined as shown in FIG. 2A or 2B.
- the SRC 101 changes the insertion interval of the pilot signal.
- FIG. 4 is a sequence chart showing a process for changing the insertion interval of a pilot signal in each data transmission and transmission data in the wireless communication system according to the first embodiment of the present invention.
- data transmission is performed from SRC 101 (data transmission: step S 121)
- DEST 102 completes reception of transmission data from this SRC 101 (reception completion: step S 1 2 2) and DEST 1 0 2 transmit acknowledgment information (“Confirmation” shown in FIG. 3) indicating that the reception has been completed normally (Confirmation information transmission: step S 1 2 3).
- the SRC 101 receives the reception acknowledgment information from the DEST 102 (reception information reception: step S124), and determines the optimal PI By calculating the insertion interval of the pilot signal or by using other methods, the insertion interval of the pilot signal is obtained (acquisition of the input interval: step S125), and the pilot is obtained. Based on the signal input interval, a pilot signal is inserted in the transmission data to be transmitted continuously and transmitted (data transmission: step S126).
- the SRC 101 every time data is transmitted (that is, at the timing of transmitting data following reception of the acknowledgment information), the SRC 101 always obtains the optimal pilot signal input interval, and It is possible to perform data transmission by using the insertion interval of the port signal.
- SRC 101 transmits information transmitted from DEST 102 to SRC 101 (reception preparation confirmation information shown in FIG. 3 and information shown in FIG. 4). Receiving confirmation information) is received, and at the reception timing, the insertion interval of the pilot signal is obtained (calculation of the insertion interval of the pilot signal or acquisition by other methods).
- the reception preparation confirmation information and reception confirmation information It may not be possible to calculate the insertion interval of the pilot signal accurately using a small bucket such as
- the time required to respond to DEST 102 is calculated. It can be long. Therefore, for example, an arbitrary signal transmitted from the SRC 101 S and DEST 102 may be received, and the insertion interval of the pilot signal may be calculated based on the received arbitrary signal. It is also possible to
- FIG. 5 is a diagram illustrating processing and transmission for changing the insertion interval of a pilot signal based on an arbitrary signal in the wireless communication system according to the first embodiment of the present invention.
- 6 is a sequence chart showing data.
- DE ST 102 is transmitting data to a wireless communication device other than SRC 101 (transmission: step S 13 1), and SRC 101 receives this data (signal). (Step S1322).
- step S 13 1 the data transmitted from DEST 102 in step S 13 1 has no meaning for SRC 101, but this data (signal) is used here. Then, the state of the transmission path between the SRC 101 S and the SRC IOI and the DEST 102 is grasped, and the insertion interval of the optimal pilot signal is calculated (insertion interval calculation: step S1 3 3). Then, the SRC 101 stores the optimal pilot signal input interval obtained by the calculation in a predetermined storage means (storage: step S1334).
- the insertion interval of the pilot signal calculated and stored as described above is used later when the SRC 101 transmits data to the DEST 102. That is, the SRC 101 calculates the DEST 102 transmission data to be transmitted based on the pilot signal insertion interval calculated in step S 133 and stored in step S 134, based on the pilot signal insertion interval. Is inserted and transmitted (data transmission: step S135).
- the SRC 101 and DEST 102 is moving, the state of the transmission line between SRC 101 and DEST 102 is sometimes changed. Because it changes every moment, it is preferable that the SRC 101 can always update the calculation of the optimal pilot signal insertion interval.
- the SRC 101 power, the transmission path condition between the SRC 101 and the DEST 102 in advance, should be used when transmitting data to the DEST 102.
- the SRC 101 can determine the optimal pilot signal insertion interval without adding time or processing load when transmitting time or processing data. , this Data transmission to DEST 102 can be performed using the insertion interval of the pilot signal.
- FIG. 6 is a sequence chart showing processing and transmission data in the wireless communication system according to the second embodiment of the present invention.
- FIG. 6 is a sequence chart of a wireless communication system having two wireless communication devices, and illustrates processing in each of the two wireless communication devices and transmission data transmitted between the two wireless communication devices. Have been. In Fig. 6, the passage of time is shown from top to bottom.
- data is transmitted from one wireless communication device (transmitting side: SRC 201 shown in FIG. 6) to the other wireless communication device (receiving side: DEST 202 shown in FIG. 6).
- SRC 201 transmitting side
- DEST 202 receives the flow of processing for determining the insertion interval of the pilot signal.
- the SRC 201 together with transmission request information requesting data transmission (“transmission request” shown in FIG. 6) and information indicating that the pilot signal insertion interval is requested (“insertion interval shown in FIG. 6”) Request)) (Send: Step S211).
- transmission request shown in FIG. 6
- insertion interval shown in FIG. 6 information indicating that the pilot signal insertion interval is requested
- the information indicating “acquirable” described in the first embodiment and the information indicating “insertion interval request” in the second embodiment are simply represented by the same 1-bit data field. For example, it can be expressed as ⁇ 1 ⁇ when "acquirable” is indicated, and as ⁇ 0 ⁇ when "insertion interval request” is indicated.
- DEST 202 receives the “transmission request” and the “insertion interval request” information (reception: step S2122), and calculates an optimal pilot signal insertion interval from the received transmission request information. Or using other methods Thus, the input interval of the pilot signal is obtained (Step S213 of obtaining the input interval of the pilot signal). In response to the transmission request information, DEST 202 inserts a pilot signal along with reception ready information (“ready” shown in FIG. 6) indicating that data reception is ready. The information on the interval (the “insertion interval” shown in FIG. 6) is transmitted to the SRC 201 as transmission data (transmission: step S2114).
- the SRC 201 receives the reception ready information and the information related to the insertion interval of the pilot signal (reception: step S215), and receives the information of the pilot signal received from the DEST 202. Based on the insertion interval, a pilot signal is inserted into the transmission data and transmitted (data transmission: step S216). It should be noted that the data transmitted in step S216 has the insertion interval of the pilot signal determined as shown in FIG. 2A or FIG. 2B.
- DEST 202 determines the insertion interval of the pilot signal. The agreement is established, and data communication can be performed in the format shown in Fig. 2A or Fig. 2B according to the insertion interval of the pilot signal specified in DEST 202.
- the pilot signal can be inserted at the pilot signal insertion interval determined by DEST 202 first.
- 0 1 and DEST 202 are moving, and taking into account that the optimal interval of the input of the pilot signal changes every moment, every predetermined number of data transmissions (for example, each data transmission) It is preferable to change the insertion interval of the pilot signal S and the pilot signal.
- FIG. 7 is a sequence chart showing a process of making the insertion interval of a pilot signal variable in each data transmission and transmission data in the wireless communication system according to the second embodiment of the present invention.
- Data transmission from SRC 201 (Data transmission: step S221)
- the DEST201 calculates the optimal interval of the insertion of the pilot signal from the data received from the SRC201, or performs other processing.
- the insertion interval of the pilot signal is obtained (obtaining the insertion interval of the pilot signal: step S2222).
- the DEST 202 receives reception confirmation information indicating that the reception has been completed normally (see FIG. 7).
- reception confirmation information indicating that the reception has been completed normally (see FIG. 7).
- insertion interval information on the insertion interval of the pilot signal
- transmission: step S224 information on the insertion interval of the pilot signal.
- the acquisition process of the insertion interval of the pilot signal is performed during the reception of the data sent from the SRC 201 and the SRC 201 After the reception of the data from 01 is completed, it is also possible to perform a process of acquiring the input interval of the pilot signal.
- the SRC 201 receives the acknowledgment, the information and the information relating to the input interval of the pilot signal (reception: step S225), and receives the pilot signal received from the DEST202.
- a pilot signal is inserted into the transmission data and transmitted based on the insertion interval of the data (data transmission: step S226).
- SRC 201 every time data is transmitted (that is, at the timing when data is transmitted following reception of acknowledgment information), SRC 201 always outputs the optimal pilot signal from DEST 202. Upon receiving the notification of the insertion interval, it becomes possible to perform data transmission using the notified insertion interval of the pilot signal.
- the information transmitted from the DEST 202 to the DEST 202 (the reception request information and the insertion interval request shown in FIG. 6) Information and the data shown in Fig. 7)
- the acquisition interval of the pilot signal insertion is calculated (calculation of the insertion interval of the pilot signal and acquisition by other methods).
- the DEST 202 uses the received reception request information and the input interval request information to calculate the insertion interval of the pilot signal. It may not be possible to accurately calculate the insertion interval of the pilot signal using a small packet such as information.
- the DEST 202 receives an arbitrary signal transmitted from the SRC 201, and calculates an input interval of the pilot signal based on the received arbitrary signal. It is also possible.
- FIG. 8 is a sequence chart showing processing for changing the input interval of a pilot signal based on an arbitrary signal and transmission data in the wireless communication system according to the second embodiment of the present invention.
- data is transmitted to a wireless communication device other than the SRC 201 DEST 202 (transmission: step S 2 3 1), and the DEST 202 can receive this data (signal). In some cases (reception: step S2 32).
- step S2 3 1 the data transmitted from SRC 201 in step S2 3 1 has no meaning for DEST 202, but here, this data (signal )
- S RC 201 and DEST 202 To determine the transmission path conditions between the DEST 202 power S, S RC 201 and DEST 202 and calculate the optimal pilot signal insertion interval (insertion). Interval calculation: Step S 2 3 3).
- DEST 202 stores the optimal interval of the input of the pilot signal obtained by the calculation in a predetermined storage means (storage: step S2334).
- the input interval of the pilot signal calculated and stored as described above is Later, when the SRC 201 requests the insertion interval of the pilot signal to DEST 202, the DEST 202 notifies the SRC 201 of the insertion interval of the pilot signal. Used for
- the DEST 202 receives the “transmission request” and “insertion interval request” information (reception: step S236), reads out the insertion interval of the pilot signal stored in step 234 (reading: step S237), and responds to the transmission request information to confirm that data reception is ready.
- the information on the pilot signal insertion interval (“insertion interval” shown in FIG. 8) is transmitted to the SRC 201 together with the reception preparation completion information (“preparation completed” shown in FIG. 8) (transmission: step S 2 3 8).
- the SRC 201 receives the reception ready information and the information related to the input interval of the pilot signal (reception: step S239), and receives the pilot signal received from the DEST 202.
- a pilot signal is inserted into the transmission data and transmitted based on the insertion interval of the data (data transmission: step S240).
- the state of the transmission path between SRC 201 and DEST 202 is Since it changes every moment, it is preferable that the DEST 202 can always update the calculation of the optimal insertion interval of the pilot signal.
- the DE ST 202 power, the transmission path condition between the SRC 201 and the DEST 202 can be grasped in advance, and the optimal pilot signal to be notified to the SRC 201 is inserted.
- DEST 202 can optimize data transmission without adding time or processing load.
- the SRC 201 can transmit data to the DEST 202 using the insertion interval of the pilot signal.
- FIG. 9 is a sequence chart showing processing and transmission data in the wireless communication system according to the third embodiment of the present invention.
- FIG. 9 is a sequence chart of a wireless communication system having two wireless communication devices, and illustrates processing in each of the two wireless communication devices and transmission data transmitted between the two wireless communication devices. Have been. In FIG. 9, the passage of time is shown from top to bottom.
- data is transmitted from one wireless communication device (transmitting side: SRC 301 shown in FIG. 9) to the other wireless communication device (receiving side: DEST 302 shown in FIG. 9).
- SRC 301 transmitting side: SRC 301 shown in FIG. 9
- DEST 302 receiving side: DEST 302 shown in FIG. 9
- the flow of processing for determining the insertion interval of the pilot signal is illustrated, and each of the SRC 301 and DEST 302 shows the internal configuration of the wireless communication device 100 shown in FIG. Have.
- the SRC 301 together with transmission request information requesting data transmission (“transmission request” shown in FIG. 9) and information indicating that the pilot signal insertion interval is requested (“insertion shown in FIG. 9”) Interval request ”) is transmitted (transmission: step S311).
- the DE ST 302 receives the “transmission request” and the “request” information (reception: step S 312), calculates the optimal pilot signal insertion interval from the received transmission request information, Alternatively, the insertion interval of the pilot signal is obtained by using another method (obtaining the insertion interval of the pilot signal: step S313). Then, the DEST 302 responds to the transmission request information with the reception preparation completion information (“preparation completed” shown in FIG. 9) indicating that data reception is ready. The information relating to the insertion interval of the pilot signal (“insertion interval” shown in FIG. 9) is transmitted as transmission data to the SRC 301 (transmission: step S3114). The processing in steps S311 to S314 is the same as the processing in steps S211 to S214 in the second embodiment.
- the SRC 301 receives the reception preparation completion information and the information related to the input interval of the pilot signal (reception: step S3115), and receives the reception preparation completion information and the pilot signal.
- the insertion interval of the pilot signal is obtained by calculating the optimal insertion interval of the pilot signal from the information on the insertion interval, or by using other methods (importing the pilot signal). Interval acquisition: Step S3 16).
- the insertion interval of the pilot signal received in step S315 (that is, the insertion interval of the pilot signal notified from DEST302), and the pilot signal acquired by itself in step S316.
- the pilot signal insertion interval is determined by referring to both of the pilot signal insertion intervals (determination of the pilot signal input interval: step S3 17), and the pilot input interval is determined.
- a pilot signal is inserted into the transmission data based on the data and transmitted (data transmission: step S318). It should be noted that the data transmitted in step S318 has the input interval of the pilot signal determined as shown in FIG. 2A or FIG. 2B.
- the average of the insertion intervals of the pilot signal obtained in step S315 and step S316 may be calculated. It is possible to adopt, for example, the longer insertion interval of the pilot signal among the input intervals of the pilot signal obtained in step S315 and step S316.
- pilot signals at the pilot signal insertion interval determined using the results of acquisition of both SRC 301 and DEST 302 first.
- the data transmission frequency For example, in each data transmission, it is preferable that the SRC 301 changes the input interval of the pilot signal.
- FIG. 10 is a sequence chart showing processing for making the insertion interval of the pilot signal variable in each data transmission and transmission data in the wireless communication system according to the third embodiment of the present invention.
- DEST 301 calculates the optimum interval for inserting a pilot signal from the data received from SRC301. Then, the input interval of the pilot signal is obtained by performing the above or other methods (obtaining the input interval of the pilot signal: step S322).
- the DEST 302 receives reception confirmation information indicating that the reception has been completed normally (FIG. 10). (Confirmation) shown in Fig. 10 and information on the insertion interval of the pilot signal ("Insertion interval" shown in Fig. 10) as transmission data to the SRC 301 (transmission: step S32). Four ) .
- the acquisition process of the pilot signal insertion interval is performed during the reception of data sent from the SRC 301, and the processing of receiving the data from the SRC 301 is performed. After the completion of the process, it is also possible to perform processing for acquiring the insertion interval of the pilot signal.
- the SRC 301 receives the acknowledgment information and the information related to the insertion interval of the pilot signal (reception: step S325), and determines the optimum pilot signal insertion interval from the received acknowledgment information. By calculating or using other methods, the insertion interval of the pilot signal is acquired (acquisition of the insertion interval: step S3226).
- step S325 that is, the input interval of the pilot signal notified from DEST302
- step S326 the pilot port obtained by itself in step S326.
- the pilot signal insertion interval is determined by referring to both of the pilot signal insertion intervals (insertion interval determination: step S3227), and the pilot data is added to the transmission data based on the pilot insertion interval.
- a data signal is inserted and transmitted (data transmission: step S328).
- the SRC 301 sets the insertion interval of its own acquired
- the optimal pilot signal insertion interval for communication is determined using the pilot signal insertion interval notified from 302, and the pilot signal insertion interval determined in this way is used. Data transmission can be performed.
- FIG. 11 is a sequence chart showing integrated processing type processing and transmission data in the wireless communication system according to the fourth embodiment of the present invention.
- This figure 11 has a plurality of wireless communication devices (MT) 401 and an access point (AP) 402. 5 is a sequence chart of a wireless communication system that performs processing in each of two wireless communication devices and transmission data transmitted between the two wireless communication devices. In FIG. 11, the passage of time is shown from top to bottom.
- the AP 402 is a wireless communication device that centrally manages communication in a plurality of MTs 401 (only two MTs 401 a and 401 b are shown in FIG. 11). 402 has the internal configuration of the wireless communication device 100 shown in FIG. First, when the MT 410a transmits arbitrary information to the AP 402 (transmission: step S411), the AP 402 receives this arbitrary information (reception: step S41). 4 12), the insertion interval of the pilot signal is calculated (insertion interval calculation: step S4 13), and the calculation result is stored in a predetermined storage means (storage: step S4 14).
- step S 415 when the MT 410 b transmits arbitrary information to the AP 402 (transmission: step S 415), the AP 404 receives the arbitrary information (step S 415).
- Step S416 calculates the insertion interval of the pilot signal (insertion interval calculation: step S417), and stores the calculation result in a predetermined storage means (storage: step S41) 8).
- steps S411 to S414 and steps S415 to S418 is the same as that of steps S131 to S134 shown in FIG.
- the AP 402 calculates and stores the input intervals of the pilot signals related to the plurality of MTs 401, and when transmitting data from the AP 402 to each MT 410, The optimal interval between the insertion of the pilot signals for each MT 401 can be used, and the optimal gateway for each MT 401 can be selected according to the request from each MT 401. It is possible to notify the insertion interval of the default signal.
- step S41 When transmission request information (“transmission request” shown in FIG. 11) and information for requesting an insertion interval (“insertion interval request” shown in FIG. 11) are transmitted to step 2 (step S41) 9)
- the AP 402 receives the transmission request information and the information for requesting the insertion interval (step S 420), and receives the optimal pilot signal related to the MT 410 b from a predetermined storage means.
- the insertion interval of this pilot signal is read out (step S 4 21) and the reception interval (“ ⁇ ready” shown in FIG. 11) is received together with the reception ready information (“ready” shown in FIG. 11). (Interval interval)) is notified (step S422).
- the MT 410b receives the insertion interval of the no-mouth signal (step S423), and inserts the pilot signal into the transmission data based on the insertion interval of the pilot signal. Transmit (data transmission: step S424). .
- the insertion interval of the pilot signal stored in the predetermined storage means becomes old information. It is also possible to judge whether or not this is the case, and if necessary, reacquire the insertion interval of the pilot signal to provide the latest information.
- one wireless communication device (AP 402) is provided with a function of calculating a pilot signal, and the function of the AP 402 and the other wireless communication device is provided.
- the multiple MTs 401 communicating with the AP 402 can determine the optimal gateway signal insertion interval. It is possible to perform data transmission using.
- FIG. 12 is a sequence diagram showing distributed processing type processing and transmission data in the radio communication system according to the fourth embodiment of the present invention.
- FIG. FIG. 12 is a sequence chart of a wireless communication system having a plurality of wireless communication devices (MT) 401 and an access point (AP) 402, similar to FIG. A process in each of the wireless communication devices and transmission data transmitted between the two wireless communication devices are illustrated. In FIG. 12, the passage of time is shown from top to bottom.
- a plurality of MTs 401 correspond to the internal configuration of the wireless communication device 100 shown in FIG. Have.
- the AP 402 broadcasts a beacon at a predetermined cycle (broadcast: step S 4 3 1).
- This beacon is a signal that includes various information such as the hardware address and communication quality (signal strength, noise level, signal quality, etc.) of the base station.
- the MT 401 (MT 410 in the communication cell of the AP 402) can receive this beacon (reception: step S432 and step S435).
- Each MT 401 estimates the transmission path condition from this beacon, calculates the insertion interval of the pilot signal (insertion interval calculation: step S433 and step S433), and performs the calculation.
- the result is stored in a predetermined storage means (storage: step S434 and step S433).
- each MT 401 calculates and stores the optimal pilot signal input interval for communication with AP 402, and stores the pilot interval for communication with AP 402. It is possible to use the optimal listening interval of the pilot signal as the input interval of the input signal.
- the MT 410 a or MT 401 b Reads out an optimal pilot signal input interval from a predetermined storage means (reading: step S438 and step S440), and Based on the insertion interval of the mouth signal, a mouth signal is inserted into the transmission data and transmitted (data transmission: step S439 and step S444).
- MT401a and MT401b always calculate the insertion interval of the pilot signal based on the latest received data from the beacon ⁇ AP402, and calculate the pilot signal. Is preferably updated.
- a function of calculating a pilot signal is provided in a plurality of wireless communication devices (MT401), and the communication with the MT410AP and the AP402 is provided.
- MT401 wireless communication devices
- the MT 411 can estimate the transmission path condition based on the beacon that the AP 402 periodically broadcasts, thereby determining the pilot signal input interval.
- the transmission path condition is estimated using signals other than the beacon, or a new signal is transmitted by the AP 402 for estimating the transmission path state, and the MT 400 is transmitted using this signal. It is also possible for 1 to estimate the state of the transmission path.
- a transmitting-side wireless communication apparatus determines an insertion interval of a known reference signal, and performs a known reference to data based on the determined insertion interval of the known reference signal. Since the signal is inserted and transmitted to the receiving wireless communication device, the transmission interval of the known reference signal inserted when the transmitting wireless communication device transmits data from the transmitting wireless communication device to the receiving wireless communication device. Can be determined, and by performing communication based on the insertion interval of the known reference signal, it is possible to improve the communication throughput.
- the reception-side wireless communication apparatus includes: Since the interval is determined and the determined insertion interval of the known reference signal is notified to the transmitting wireless communication device, the receiving wireless communication device transmits data from the transmitting wireless communication device to the receiving wireless communication device. It is possible to determine the interval of insertion of a known reference signal inserted when transmitting a known reference signal, and it is possible to improve communication throughput by performing communication at the interval of input of a known reference signal. Become.
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Abstract
Description
Claims
Priority Applications (3)
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EP03811121A EP1569400A4 (en) | 2002-11-11 | 2003-11-11 | RADIOCOMMUNICATION SYSTEM AND METHOD |
AU2003277677A AU2003277677A1 (en) | 2002-11-11 | 2003-11-11 | Radio communication system and radio communication method |
US10/534,274 US20060154612A1 (en) | 2002-11-11 | 2003-11-11 | Radio communication system and radio communication method |
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JP2002-327118 | 2002-11-11 | ||
JP2002327118A JP4050595B2 (ja) | 2002-11-11 | 2002-11-11 | 無線通信システム及び無線通信方法並びに無線通信装置 |
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JPH11266228A (ja) * | 1998-03-18 | 1999-09-28 | Fujitsu Ltd | 無線基地局のマルチビームアンテナシステム |
JPH11284597A (ja) * | 1998-03-31 | 1999-10-15 | Jisedai Digital Television Hoso System Kenkyusho:Kk | Ofdm伝送方式 |
JP2000224247A (ja) * | 1999-01-28 | 2000-08-11 | Matsushita Electric Ind Co Ltd | ディジタル無線通信方式 |
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JP2003332943A (ja) * | 2002-05-10 | 2003-11-21 | Ntt Docomo Inc | チャネル推定を行う無線通信局および無線通信方法 |
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JP3652837B2 (ja) | 1997-05-12 | 2005-05-25 | シャープ株式会社 | Tdma通信システム |
CN1135782C (zh) * | 1997-05-16 | 2004-01-21 | Ntt移动通信网株式会社 | 变长帧传输方法、发射机和接收机 |
GB2329796A (en) * | 1997-09-29 | 1999-03-31 | Motorola Ltd | Increased data rate by reduction of training data |
JP3377420B2 (ja) | 1997-11-14 | 2003-02-17 | シャープ株式会社 | 通信処理装置 |
US7027464B1 (en) * | 1999-07-30 | 2006-04-11 | Matsushita Electric Industrial Co., Ltd. | OFDM signal transmission scheme, and OFDM signal transmitter/receiver |
JP2001111464A (ja) * | 1999-10-08 | 2001-04-20 | Matsushita Electric Ind Co Ltd | 基地局装置及び無線送信方法 |
US6836564B2 (en) * | 2000-04-28 | 2004-12-28 | Denso Corporation | Image data compressing method and apparatus which compress image data separately by modifying color |
JP3695330B2 (ja) | 2000-12-26 | 2005-09-14 | 株式会社デンソー | 画像圧縮方法及び装置、記録媒体 |
JP3462468B2 (ja) * | 2000-11-27 | 2003-11-05 | 松下電器産業株式会社 | Ofdm受信装置、ofdm送信装置およびofdm通信方法 |
CA2439287C (en) * | 2001-02-28 | 2009-12-15 | Ultra Electronics Canada Defence Inc./Defense Ultra Electronics Canada Inc. | Frame synchronization method and system |
JP3583730B2 (ja) * | 2001-03-26 | 2004-11-04 | 株式会社東芝 | 無線通信システム及び無線伝送装置 |
JP4108390B2 (ja) | 2002-07-08 | 2008-06-25 | 松下電器産業株式会社 | 無線通信方法及び無線通信端末並びに無線lanシステム |
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2002
- 2002-11-11 JP JP2002327118A patent/JP4050595B2/ja not_active Expired - Lifetime
-
2003
- 2003-11-11 US US10/534,274 patent/US20060154612A1/en not_active Abandoned
- 2003-11-11 CN CNB2003801029952A patent/CN100574294C/zh not_active Expired - Lifetime
- 2003-11-11 EP EP11191426A patent/EP2426879A3/en not_active Withdrawn
- 2003-11-11 WO PCT/JP2003/014330 patent/WO2004045176A1/ja active Application Filing
- 2003-11-11 AU AU2003277677A patent/AU2003277677A1/en not_active Abandoned
- 2003-11-11 EP EP03811121A patent/EP1569400A4/en not_active Withdrawn
-
2007
- 2007-10-29 US US11/927,338 patent/US7545770B2/en active Active
Patent Citations (5)
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JPH11266228A (ja) * | 1998-03-18 | 1999-09-28 | Fujitsu Ltd | 無線基地局のマルチビームアンテナシステム |
JPH11284597A (ja) * | 1998-03-31 | 1999-10-15 | Jisedai Digital Television Hoso System Kenkyusho:Kk | Ofdm伝送方式 |
JP2000224247A (ja) * | 1999-01-28 | 2000-08-11 | Matsushita Electric Ind Co Ltd | ディジタル無線通信方式 |
JP2001339363A (ja) * | 1999-07-30 | 2001-12-07 | Matsushita Electric Ind Co Ltd | Ofdm信号の伝送方法、送信装置及び受信装置 |
JP2003332943A (ja) * | 2002-05-10 | 2003-11-21 | Ntt Docomo Inc | チャネル推定を行う無線通信局および無線通信方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1569400A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1569400A1 (en) | 2005-08-31 |
AU2003277677A1 (en) | 2004-06-03 |
US20060154612A1 (en) | 2006-07-13 |
EP2426879A2 (en) | 2012-03-07 |
CN1714551A (zh) | 2005-12-28 |
EP2426879A3 (en) | 2012-05-02 |
CN100574294C (zh) | 2009-12-23 |
JP2004165830A (ja) | 2004-06-10 |
JP4050595B2 (ja) | 2008-02-20 |
EP1569400A4 (en) | 2011-11-16 |
US7545770B2 (en) | 2009-06-09 |
US20080051052A1 (en) | 2008-02-28 |
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