WO2006134991A1 - マルチキャリア通信における無線通信基地局装置、無線通信移動局装置および無線通信方法 - Google Patents
マルチキャリア通信における無線通信基地局装置、無線通信移動局装置および無線通信方法 Download PDFInfo
- Publication number
- WO2006134991A1 WO2006134991A1 PCT/JP2006/312000 JP2006312000W WO2006134991A1 WO 2006134991 A1 WO2006134991 A1 WO 2006134991A1 JP 2006312000 W JP2006312000 W JP 2006312000W WO 2006134991 A1 WO2006134991 A1 WO 2006134991A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile station
- base station
- station apparatus
- radio communication
- unit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7107—Subtractive interference cancellation
-
- 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
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- 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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- 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
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/48—TPC being performed in particular situations during retransmission after error or non-acknowledgment
Definitions
- Radio communication base station apparatus radio communication mobile station apparatus and radio communication method in multicarrier communication
- the present invention relates to a radio communication base station apparatus, radio communication mobile station apparatus, and radio communication method in multicarrier communication.
- OFDM Orthogonal Frequency Division Multiplexing
- OFDM is a multicarrier transmission technology that transmits data in parallel using a large number of subcarriers, and has features such as high frequency utilization efficiency and reduced inter-symbol interference in a multipath environment, and is effective in improving transmission efficiency. It is known.
- the quality of each subcarrier may fluctuate greatly due to frequency selective fading due to multipath.
- the signal assigned to the subcarrier at the position where the fading valley occurs is poor in quality and difficult to demodulate, it is necessary to improve the quality so that it can be demodulated.
- the repetition technology is a technology that creates a plurality of the same symbols by duplicating a certain symbol (repetition), and assigns the same symbols to a plurality of different subcarriers or at different times and transmits them. Diversity gain can be obtained by combining the same symbols with the maximum ratio (see, for example, Non-Patent Document 1).
- Non-Patent Document 1 Maeda, Shin, Kishiyama, Sawahashi, “In downlink broadband channel Comparison of characteristics between OFCDM and OFDM “, IEICE, IEICE Technical Report RCS2002—162, August 2002
- a radio communication mobile station apparatus located near a cell boundary
- the influence of interference from adjacent cells is large. Even if multiple identical symbols repeated in a base station) are combined at the maximum ratio, the required quality may not be achieved.
- MMSE synthesis interference suppression symbol synthesis
- MMSE Minimum Mean Square Error
- An object of the present invention is to provide a base station, a mobile station, and a radio communication method capable of efficiently performing interference suppression symbol synthesis while suppressing a decrease in transmission rate when a repetition technique is used in multicarrier communication. Is to provide.
- the base station of the present invention is a radio communication base station apparatus that transmits a multicarrier signal composed of a plurality of subcarriers, and responds to a request from a radio communication mobile station apparatus or a radio communication base station apparatus of an adjacent cell.
- a duplicating means for duplicating the symbol to create a plurality of identical symbols, and when the duplicating means performs the duplication, at least one of the modulation multi-level number and the coding rate of the symbol is changed.
- a configuration comprising MCS control means and transmission means for transmitting the multicarrier signal in which the plurality of identical symbols are allocated to any of the plurality of subcarriers is adopted.
- FIG. 1 is a configuration diagram of a mobile communication system according to Embodiment 1 of the present invention (part 1).
- FIG. 2 is a block diagram showing a configuration of a mobile station according to Embodiment 1 of the present invention.
- FIG. 3 is a block diagram showing a configuration of a base station according to Embodiment 1 of the present invention.
- FIG. 4 MCS table according to Embodiment 1 of the present invention.
- FIG. 5 is an operation sequence diagram of the mobile communication system according to the first embodiment of the present invention (part 1).
- FIG. 6 is an operation sequence diagram of the mobile communication system according to the first embodiment of the present invention (part 2).
- FIG. 7 is an operation sequence diagram of the mobile communication system according to the first embodiment of the present invention (part 3).
- FIG. 8 is a configuration diagram of a mobile communication system according to the first embodiment of the present invention (part 2).
- FIG. 9 Operation sequence diagram of mobile communication system according to embodiment 1 of the present invention (part 4).
- FIG. 10 is an operation sequence diagram of the mobile communication system according to the first embodiment of the present invention (part 5).
- FIG. 11 is a block diagram showing the configuration of a mobile station according to Embodiment 2 of the present invention.
- FIG. 12 is a block diagram showing a configuration of a base station according to Embodiment 2 of the present invention.
- FIG. 13 is an operation sequence diagram of the mobile communication system according to the second embodiment of the present invention (part 1).
- FIG. 14 is a reception characteristic diagram according to the second embodiment of the present invention.
- FIG. 15 is an operation sequence diagram of the mobile communication system according to the second embodiment of the present invention (part 2).
- FIG. 1 shows the configuration of a mobile communication system according to the present embodiment.
- mobile station MS power S and cell A communicate with base station BS.
- the base station BS becomes the desired station, and the base station BS becomes the interfering station.
- Ie base The data transmitted from the station BS to the mobile station MS located in cell A is sent to the mobile station MS.
- the desired wave for the mobile station MS and the interference wave for the mobile station MS are also base
- the station BS and the base station BS are connected to the wireless network control station device (
- RNC Radio Network Controller
- cell A and cell B are adjacent, and mobile station MS is near the cell boundary of cell A.
- the mobile station MS receives data from the base station BS as a desired signal.
- the base station BS power data is received as an interference wave. So the mobile station
- FIG. 2 shows the configuration of mobile station 100 according to the present embodiment
- FIG. 3 shows the configuration of base station 200 according to the present embodiment.
- Both the mobile station MS and mobile station MS adopt the configuration shown in Fig. 2.
- Both base stations BS adopt the configuration shown in Fig. 3.
- the mobile station 100 starts from the base station 200.
- An OFDM symbol that is a transmitted multicarrier signal is received.
- the OFDM synthesizer received via the antenna 101 is subjected to reception processing such as down-conversion and A / D conversion by the radio reception unit 102, and then the GI removal unit GI is removed at 103 and input to FFT (Fast Fourier Transform) section 104.
- reception processing such as down-conversion and A / D conversion by the radio reception unit 102
- GI removal unit GI is removed at 103 and input to FFT (Fast Fourier Transform) section 104.
- FFT Fast Fourier Transform
- FFT section 104 performs an FFT on the OFDM symbol, extracts the symbol assigned to each subcarrier, and outputs the symbols for 1 OFDM to demultiplexing section 105 in parallel.
- Separating section 105 divides the input symbol into FFT section 104 into pilot symbols and data symbols, outputs the data symbols to P / S section (parallel / serial conversion section) 106, and outputs the pilot symbols. Output to interference level measurement section 107 and channel estimation section 108.
- P / S section 106 converts the data symbol sequence input in parallel from demultiplexing section 105 into a serial signal, and outputs it to switch 109.
- Interference level measurement section 107 measures the pilot symbol interference level and outputs the measurement result to switching control section 110. If the mobile station 100 is the mobile station MS shown in FIG.
- Channel estimation section 108 obtains a channel estimation value (for example, propagation path fluctuation level) of each subcarrier using pilot symbols, and outputs it to switch 111 together with the pilot symbols.
- a channel estimation value for example, propagation path fluctuation level
- switching control section 110 compares the interference level measured by interference level measurement section 107 with the threshold of the interference level, and switches switch 109 and switch 111 based on the comparison result.
- switching control section 110 controls switch 109 to connect P / S section 106 and weight multiplication section 113 and control switch 111 when the interference level exceeds a threshold value. Then, the channel estimation unit 108 and the weight calculation unit 112 are connected. Therefore, in this case, the data symbol output from P / S section 106 is input to weight multiplication section 113, and the channel estimation value and pilot symbol output from channel estimation section 108 are input to weight calculation section 112. .
- Weight calculation section 112 calculates an MMSE-based interference suppression weight from the pilot symbol and the channel estimation value, and outputs the result to weight multiplication section 113.
- Weight multiplication section 113 multiplies the data symbol by the interference suppression weight and outputs the result to synthesis section 114.
- Combining section 114 combines the data symbols multiplied by the interference suppression weights between repetition data units, that is, between the same data symbols created by repetition in base station 200. As a result, MMSE synthesis is performed.
- switching control section 110 controls switch 109 to connect PZS section 106 and channel compensation section 117 and switch 111. Control is performed to connect channel estimation section 108 and channel compensation section 117. Therefore, in this case, the data symbol output from P / S section 106 and the channel estimation value and pilot symbol output from channel estimation section 108 are input to channel compensation section 117.
- Channel compensation section 117 compensates for channel fluctuation (phase fluctuation and amplitude fluctuation) of the data symbol based on the channel estimation value, and outputs the data symbol after channel fluctuation compensation to demodulation section 115.
- the data symbol output from P / S section 106 is input to demodulation section 115 without passing through weight multiplication section 113 and combining section 114, demodulated by demodulation section 115, and decoded section 116 Decrypted with Thereby, received data is obtained. Further, since the channel estimation value and pilot symbol output from the channel estimation unit 108 are not input to the weight calculation unit 112, weight calculation by the weight calculation unit 112 is not performed. When the interference level is less than the threshold value, it is assumed that repetition is not performed in base station 200 according to the present embodiment.
- MMSE combining is performed only when the interference level is relatively high, so that interference suppression symbol combining can be performed efficiently.
- switching control section 110 gives an instruction to create request signal to request signal creating section 118, and in accordance with this instruction, request signal creating section 118 Creates a request signal.
- This request signal is a signal for requesting the base station 200 to create a plurality of identical symbols in order to enable the mobile station 100 to perform MMSE composition. That is, it is a signal for requesting the base station 200 to execute repetition. For example, when the mobile station 100 is the mobile station MS shown in FIG.
- This request signal is sent from the mobile station MS to both the base station BS and the base station BS.
- this request signal is a signal for requesting the neighboring cell (cell base station BS to execute the repetition. This request signal
- this request signal includes a The number of symbol repetitions, that is, the repetition factor (RF) is included.
- Encoding section 120 performs an encoding process on the input transmission data (bit string), and modulation section 121 performs a modulation process on the transmission data after encoding to convert data symbols. Generate.
- Multiplexer 122 multiplexes the transmission signal input from modulator 121 with the request signal input from modulator 119 as control data, and outputs the multiplexed data to radio transmitter 123. Note that as a multiplexing method in the multiplexing unit 122, any of time multiplexing, frequency multiplexing, or code multiplexing may be used.
- Transmission data multiplexed with control data is subjected to transmission processing such as DZA conversion, amplification and up-conversion in radio transmission section 123, and then transmitted from antenna 101 to base station 200 shown in FIG. Is done.
- the request signal is transmitted when the interference level is equal to or higher than the threshold value.
- the radio signal from mobile station 100 received by antenna 201 is subjected to reception processing such as down-conversion and A / D conversion by radio reception unit 202, and is then sent to demultiplexing unit 203. Entered.
- Separation section 203 separates the signal of the control data portion from the signal input from radio reception section 202 and outputs the signal to demodulation section 206, and outputs the remaining signal to demodulation section 204.
- Demodulation section 204 demodulates the input signal, and decoding section 205 decodes the demodulated signal.
- reception data is obtained.
- the demodulator 206 demodulates the signal in the control data portion to obtain control data.
- This control data is input to the MCS control unit 210 and the RF (Repetition Factor) control unit 211 and is also sent to the control station RNC shown in FIG. Sent to the station.
- the control data is received by the base station BS.
- Encoding section 207 performs an encoding process on the input transmission data (bit string), and converts it.
- the modulation unit 208 performs modulation processing on the transmission data after the sign generation to generate a data symbol.
- the encoding rate R in the encoding unit 207 and the modulation scheme in the modulation unit 208 are controlled by an MCS (Modulation and Coding Scheme) control unit 210.
- MCS Modulation and Coding Scheme
- the repetition unit 209 duplicates (repeats) each data symbol input from the modulation unit 208 in response to a request from the mobile station 100 to generate a plurality of identical data symbols.
- the plurality of identical data symbols are referred to as a repetition unit, and the mobile station 100 shown in FIG. 2 performs interference suppression by combining each data symbol in the repetition unit as described above.
- the MCS control unit 210 controls the code rate R in the encoding unit 207 and the modulation scheme in the modulation unit 208 according to control data, that is, a request signal from the mobile station 100.
- the MCS control unit 210 increases the code rate R as the repetition factor increases.
- the MCS control unit 210 increases the modulation multi-level number by changing the modulation method from BPSK ⁇ Q PSK ⁇ 8PSK ⁇ 16QAM ⁇ 64QAM as the repetition factor increases. Both the coding rate and the modulation method may be changed, or only one of the coding rate or the modulation method may be changed.
- the RF control unit 211 controls the number of symbol repetitions (number of symbol duplications) in the repetition unit 209, that is, the repetition factor, in accordance with control data, that is, a request signal from the mobile station 100.
- S / P section 212 converts the data symbol sequence input in series from repetition section 209 into parallel and outputs it to multiplexing section 213. By this serial / parallel conversion, each data symbol is assigned to a plurality of subcarriers constituting the multicarrier signal.
- Multiplexing section 213 selects and outputs a pilot symbol each time a predetermined number (for example, one frame) of data symbols is input from S / P section 212, and outputs the data symbol and pilot symbol in time. Multiplex.
- IFFT Inverse Fast Fourier Transform
- section 214 performs IFFT on a plurality of subcarriers assigned pilot symbols or data symbol power S, and performs multicarrier Get the signal OFDM symbol.
- GI adding section 215 adds the same signal as the tail part of the OFDM symbol to the beginning of the OFDM symbol to provide a GI (Guard Interval).
- Radio transmitting section 216 performs transmission processing such as D / A conversion, amplification and up-conversion on the OFDM symbol after GI addition, and transmits the result from antenna 201 to mobile station 100 shown in FIG.
- RF control section 211 sets the repetition factor included in the request signal in repetition section 209. That is, the repetition unit 209 performs repetition in response to a request for 100 mobile stations.
- repetition unit 209 when repetition is performed, a plurality of the same data symbols are created, so that the transmission rate of the data symbols is lowered. Therefore, in order to suppress the decrease in the transmission rate, when repetition is performed by the repetition unit 209, one or both of the coding rate and the modulation multi-value number are increased.
- the mobile station MS moves near the cell boundary of cell A, and interference from cell B increases, causing interference.
- This request signal is sent via the BS BS wired network.
- the repeatability is the same as in FIG.
- the request signal to the base station BS is directly transmitted by the mobile station MS power radio as shown in FIG.
- It may be transmitted to the neighboring base station BS.
- the mobile station MS sets an interference level to the base station BS instead of transmitting a request signal.
- the mobile station MS is positioned near the cell boundary of cell A.
- the mobile station MS When interference from cell B becomes large, the number of symbol repetitions in the desired wave and the number of symbol repetitions in the interference wave can be combined. Therefore, the mobile station MS
- the base station BS (i.e., only if there is a large interference from cell B in the vicinity)
- the base station BS does not need unnecessary repetition in order to repeat the repetition to the neighbor cell base station).
- the mobile station MS In order to increase one or both of the coding rate and the modulation level, the mobile station MS
- the present invention can also be implemented in the same manner as described above between adjacent sectors in the same cell.
- the present invention can be implemented in the same manner as described above between adjacent sectors ⁇ and ⁇ . That is, in the above description, the present invention can be implemented in the same manner as described above by regarding cell A as sector A and cell B as sector B. Therefore, in FIG. 8, the data transmitted from the base station BS to the mobile station MS located in the sector A is the desired wave for the mobile station MS.
- the data transmitted from the base station BS to the mobile station MS located in the sector B is
- the desired wave for the MS and the interference wave for the mobile station MS are the desired wave for the MS and the interference wave for the mobile station MS.
- sector A and sector B are adjacent to each other, and mobile station MS is the sector boundary of sector A.
- the mobile station MS When located in the vicinity, the mobile station MS receives data to sector A as a desired wave.
- the interference wave is suppressed by combining these data with MMSE.
- the mobile station MS moves near the sector boundary of sector A, and interference from sector B increases.
- the base station BS that has received the request signal repeats transmission data to the mobile station MS.
- the mobile station MS In the base station BS, the mobile station MS
- the base station BS transmits RF to the mobile station MS.
- the repetition factor at the base station BS is the same as in FIG.
- the configuration of the base station BS has the configuration shown in Fig. 3 for each sector.
- Embodiment 1 when repetition is performed, one or both of the coding rate and the modulation multi-level number is increased in order to suppress a decrease in transmission rate. In general, if the line conditions are the same, the error rate characteristics deteriorate and the throughput decreases as the code rate or the modulation level increases. Therefore, in the present embodiment, when repetition is performed, one or both of the coding rate and the modulation multilevel number are increased, and the transmission power is increased to prevent the error rate characteristic from being deteriorated.
- FIG. 11 shows the configuration of mobile station 300 according to the present embodiment.
- FIG. 12 shows the configuration of base station 400 according to the present embodiment. 11 and 12, the same reference numerals are given to the same components as those in the first embodiment (FIGS. 2 and 3), and description thereof is omitted.
- switching control section 110 gives an instruction to create permission signal to permission signal creating section 301 when the interference level is equal to or higher than the threshold value.
- the permission signal creation unit 301 creates a permission signal.
- This permission signal is a signal for permitting the base station 400 to increase transmission power. For example, if mobile station 300 is In the case of the mobile station MS shown in Fig. 1, this permission signal is transmitted from the mobile station MS to the base station BS.
- This signal allows transmission power to be increased for both the base station BS and the base station BS. Also base station
- I is a signal that permits an increase in transmission power to the base station BS of the P-contact cell (cell B).
- This permission signal is modulated by modulation section 302 and input to multiplexing section 122.
- the multiplexing unit 122 multiplexes both the request signal input from the modulation unit 119 and the permission signal input from the modulation unit 302 into the transmission data input from the modulation unit 121 as control data, and the radio transmission unit Output to 123.
- the transmission data multiplexed with the control data is subjected to transmission processing such as DZA conversion, amplification and up-conversion in radio transmission section 123, and then transmitted from antenna 101 to base station 400 shown in FIG.
- the transmission processing such as DZA conversion, amplification and up-conversion in radio transmission section 123, and then transmitted from antenna 101 to base station 400 shown in FIG.
- the permission signal is transmitted when the interference level is equal to or higher than the threshold value.
- transmission power control section 401 controls the transmission power of data symbols output from repetition section 209 according to the permission signal in the control data.
- a permission signal is transmitted from the mobile station 300, a request signal is also transmitted at the same time. Therefore, the base station 400 is permitted to increase transmission power when performing repetition. Therefore, when the repetition unit 209 performs repetition, the transmission power control unit 401 increases the transmission power of a plurality of identical data symbols created by repetition.
- the base station 400 is the base station BS shown in FIG.
- the transmission power is not increased.
- the mobile station MS that receives the desired wave from the base station BS
- the base station BS is set to the mobile station MS as in FIG. 13
- the mobile station MS moves near the cell boundary of cell A, and the base station BS power interference increases.
- the signal is transmitted as control data to the base station BS.
- the base station BS that has received the request signal and the permission signal sets the repetition factor to RF.
- the base station MS will transmit even if it receives the permission signal.
- the power is not increased.
- the transmission power is increased by the amount expected to deteriorate due to the MCS being changed from MCS2 to MCS2 '.
- the reception quality at the mobile station MS in FIG.
- R can be increased by the increase in transmission power, so that the throughput between the base station BS and the mobile station MS can be maintained by suppressing the deterioration of the error rate characteristics due to the increase in the number of modulation levels.
- the mobile station MS can perform MMSE combining when the interference level is high.
- the present invention can also be performed between adjacent sectors in the same cell as in the first embodiment.
- the present invention can be implemented in the same manner as described above between sectors A and B adjacent to each other.
- the base station BS As an initial state, as in FIG. 9, the base station BS
- the signal is transmitted as control data to the base station BS.
- the base station BS that has received the request signal and the permission signal transmits data to the mobile station MS.
- RF 2
- BS base station
- the base station MS receives the permission signal, it transmits to the mobile station MS.
- the power is not increased.
- the presence / absence of symbol combining is switched according to the interference level, but the maximum ratio combining and MMSE combining may be switched according to the interference level. That is, among the desired station base station and the interfering station base station, the desired station always repeats and performs maximum ratio combining in the mobile station. If the interference level exceeds the threshold value, the same as above. Thus, repetition may also be performed on the interfering station, and MMSE combining may be performed at the mobile station.
- the base station may be referred to as Node B, the mobile station as UE, and the subcarrier as tone.
- each functional block used in the description of each of the above embodiments is typically realized as an LSI that is an integrated circuit. These may be individually arranged on one chip, or may be integrated into one chip so as to include a part or all of them.
- the name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- FPGA Field Programmable Gate Array
- FPGA Field Programmable Gate Array
- the present invention can be applied to a mobile communication system and the like.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/917,758 US7953197B2 (en) | 2005-06-17 | 2006-06-15 | Radio communication base station apparatus, radio communication mobile station apparatus, and radio communication method in multi-carrier communication |
EP06766734A EP1881621A4 (en) | 2005-06-17 | 2006-06-15 | BASE STATION AND MOBILE STATION DEVICE AND METHOD OF MULTI-RADIO COMMUNICATION |
JP2007521331A JP4827843B2 (ja) | 2005-06-17 | 2006-06-15 | マルチキャリア通信における無線通信基地局装置、無線通信移動局装置および無線通信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005177780 | 2005-06-17 | ||
JP2005-177780 | 2005-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006134991A1 true WO2006134991A1 (ja) | 2006-12-21 |
Family
ID=37532345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/312000 WO2006134991A1 (ja) | 2005-06-17 | 2006-06-15 | マルチキャリア通信における無線通信基地局装置、無線通信移動局装置および無線通信方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7953197B2 (ja) |
EP (1) | EP1881621A4 (ja) |
JP (1) | JP4827843B2 (ja) |
CN (1) | CN101208881A (ja) |
WO (1) | WO2006134991A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007235473A (ja) * | 2006-02-28 | 2007-09-13 | Sanyo Electric Co Ltd | 受信方法および装置 |
WO2009001566A1 (ja) * | 2007-06-27 | 2008-12-31 | Panasonic Corporation | 無線送信装置、無線受信装置およびプリコーディング方法 |
KR100958492B1 (ko) | 2006-12-26 | 2010-05-17 | 후지쯔 가부시끼가이샤 | 복수의 섹터 대응의 송신부를 구비한 무선 기지국 및복수의 섹터용의 신호의 송신 방법 |
EP2226982A1 (en) * | 2007-09-27 | 2010-09-08 | Datang Mobile Communications Equipment Co., Ltd | Multi-users detecting method and device of ofdm transmission signal |
US8300592B2 (en) | 2007-10-11 | 2012-10-30 | China Academy Of Telecommunications Technology | Signal transmission method and device |
CN101378376B (zh) * | 2007-08-28 | 2012-11-14 | 株式会社日立制作所 | 无线通信装置、无线通信方法及峰值抑制方法 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8705506B2 (en) * | 2007-11-16 | 2014-04-22 | Qualcomm Incorporated | Time reservation for a dominant interference scenario in a wireless communication network |
DE102009017552B3 (de) * | 2009-04-17 | 2010-09-30 | Sew-Eurodrive Gmbh & Co. Kg | Vorrichtung und Verfahren zur berührungslosen Übertragung elektrischer Leistung und Information |
US9264097B2 (en) | 2009-06-04 | 2016-02-16 | Qualcomm Incorporated | Interference mitigation for downlink in a wireless communication system |
US20130336193A1 (en) | 2012-06-19 | 2013-12-19 | Qualcomm Incorporated | Network information for assisting user equipment |
JP5254180B2 (ja) * | 2009-10-27 | 2013-08-07 | シャープ株式会社 | 受信装置、受信方法、通信システムおよび通信方法 |
US20110194430A1 (en) * | 2009-12-18 | 2011-08-11 | Qualcomm Incorporated | Method and apparatus for unified channel estimation for wireless communication |
JP6111817B2 (ja) * | 2013-04-24 | 2017-04-12 | 富士通株式会社 | 基地局,通信システム |
US20170171766A1 (en) * | 2015-12-13 | 2017-06-15 | Yuval Amizur | Fine timing measurement |
US20210336833A1 (en) * | 2020-04-27 | 2021-10-28 | Qualcomm Incorporated | Repetition on subcarriers for noncoherent modulation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004023716A (ja) * | 2002-06-20 | 2004-01-22 | Matsushita Electric Ind Co Ltd | 無線通信システムおよびスケジューリング方法 |
JP2004200856A (ja) * | 2002-12-17 | 2004-07-15 | Kddi Corp | Ofdm及びmc−cdmaを用いる送信装置、システム及び方法 |
JP2005177780A (ja) | 2003-12-17 | 2005-07-07 | Dowa Hatsujo Kk | ばね製造装置及びばね製造方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7110466B1 (en) * | 2000-06-05 | 2006-09-19 | Lucent Technologies Inc. | Variable rate message coding |
US7437654B2 (en) * | 2000-11-29 | 2008-10-14 | Lucent Technologies Inc. | Sub-packet adaptation in a wireless communication system |
US7154936B2 (en) * | 2001-12-03 | 2006-12-26 | Qualcomm, Incorporated | Iterative detection and decoding for a MIMO-OFDM system |
KR100457188B1 (ko) * | 2002-10-07 | 2004-11-16 | 한국전자통신연구원 | 확산 방식 전환이 가능한 적응형 다중반송파코드분할다중접속 장치 및 그 방법 |
WO2005006622A1 (ja) | 2003-07-14 | 2005-01-20 | Matsushita Electric Industrial Co., Ltd. | マルチキャリア送信装置、マルチキャリア受信装置及びマルチキャリア通信方法 |
US7418042B2 (en) * | 2003-09-17 | 2008-08-26 | Atheros Communications, Inc. | Repetition coding for a wireless system |
KR100866237B1 (ko) * | 2004-01-20 | 2008-10-30 | 삼성전자주식회사 | 고속 무선 데이터 시스템을 위한 변조 차수 결정 장치 및 방법과 그 데이터 수신 장치 및 방법 |
EP1739870A4 (en) * | 2004-05-11 | 2011-05-25 | Panasonic Corp | RADIO TRANSMITTER, RADIO RECEIVER AND WIRELESS COMMUNICATION SYSTEM |
US7746802B2 (en) * | 2004-06-01 | 2010-06-29 | Samsung Electronics Co., Ltd. | Method and apparatus for channel state feedback using arithmetic coding |
CN1961514A (zh) * | 2004-07-06 | 2007-05-09 | 松下电器产业株式会社 | 多载波发送装置以及多载波发送方法 |
EP1821416A4 (en) * | 2004-12-28 | 2012-05-30 | Panasonic Corp | METHOD AND DEVICE FOR THE TRANSMISSION CONTROL METHOD, METHOD AND APPARATUS FOR TRANSMISSION SUB-VALVE ASSESSMENT |
US20070160257A1 (en) * | 2005-04-13 | 2007-07-12 | Stiles Enrique M | Axial magnet assisted radial magnet air return motor for electromagnetic transducer |
US7782896B2 (en) * | 2005-08-19 | 2010-08-24 | Panasonic Corporation | Wireless communication apparatus and wireless communication method |
RU2008117385A (ru) * | 2005-11-10 | 2009-11-10 | Панасоник Корпорэйшн (Jp) | Радиопередающее устройство и способ радиопередачи |
-
2006
- 2006-06-15 US US11/917,758 patent/US7953197B2/en active Active
- 2006-06-15 CN CNA2006800215967A patent/CN101208881A/zh active Pending
- 2006-06-15 WO PCT/JP2006/312000 patent/WO2006134991A1/ja active Application Filing
- 2006-06-15 EP EP06766734A patent/EP1881621A4/en not_active Withdrawn
- 2006-06-15 JP JP2007521331A patent/JP4827843B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004023716A (ja) * | 2002-06-20 | 2004-01-22 | Matsushita Electric Ind Co Ltd | 無線通信システムおよびスケジューリング方法 |
JP2004200856A (ja) * | 2002-12-17 | 2004-07-15 | Kddi Corp | Ofdm及びmc−cdmaを用いる送信装置、システム及び方法 |
JP2005177780A (ja) | 2003-12-17 | 2005-07-07 | Dowa Hatsujo Kk | ばね製造装置及びばね製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1881621A4 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007235473A (ja) * | 2006-02-28 | 2007-09-13 | Sanyo Electric Co Ltd | 受信方法および装置 |
KR100958492B1 (ko) | 2006-12-26 | 2010-05-17 | 후지쯔 가부시끼가이샤 | 복수의 섹터 대응의 송신부를 구비한 무선 기지국 및복수의 섹터용의 신호의 송신 방법 |
WO2009001566A1 (ja) * | 2007-06-27 | 2008-12-31 | Panasonic Corporation | 無線送信装置、無線受信装置およびプリコーディング方法 |
CN101378376B (zh) * | 2007-08-28 | 2012-11-14 | 株式会社日立制作所 | 无线通信装置、无线通信方法及峰值抑制方法 |
EP2226982A1 (en) * | 2007-09-27 | 2010-09-08 | Datang Mobile Communications Equipment Co., Ltd | Multi-users detecting method and device of ofdm transmission signal |
EP2226982A4 (en) * | 2007-09-27 | 2013-04-17 | China Academy Of Telecomm Tech | METHOD AND DEVICE FOR MULTI-USER DETECTION OF OFDM TRANSMISSION SIGNAL |
US8300592B2 (en) | 2007-10-11 | 2012-10-30 | China Academy Of Telecommunications Technology | Signal transmission method and device |
Also Published As
Publication number | Publication date |
---|---|
CN101208881A (zh) | 2008-06-25 |
JPWO2006134991A1 (ja) | 2009-01-08 |
US20090233598A1 (en) | 2009-09-17 |
US7953197B2 (en) | 2011-05-31 |
EP1881621A1 (en) | 2008-01-23 |
EP1881621A4 (en) | 2011-08-03 |
JP4827843B2 (ja) | 2011-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4827843B2 (ja) | マルチキャリア通信における無線通信基地局装置、無線通信移動局装置および無線通信方法 | |
JP4907524B2 (ja) | マルチキャリア通信における無線通信基地局装置および無線通信方法 | |
JP4451400B2 (ja) | 送信装置及び送信方法 | |
JP4818455B2 (ja) | 集積回路 | |
US8976838B2 (en) | Apparatus for assigning and estimating transmission symbols | |
CN102057702B (zh) | 在无线通信网络中提供上行链路结构和最小化导频信号开销的方法与系统 | |
JP5899277B2 (ja) | 高速パケットデータシステムの順方向リンクでmimo技術をサポートする送受信装置及び方法 | |
US7782896B2 (en) | Wireless communication apparatus and wireless communication method | |
JP5078610B2 (ja) | 無線通信装置および無線通信方法 | |
JP4864000B2 (ja) | マルチキャリア通信における無線通信基地局装置および無線通信方法 | |
WO2005018125A1 (ja) | マルチキャリア通信装置、マルチキャリア通信システム、および送信電力制御方法 | |
JP4719154B2 (ja) | マルチキャリア通信における無線送信装置および無線送信方法 | |
WO2006013705A1 (ja) | マルチキャリア通信における無線送信装置および無線送信方法 | |
JPWO2007013560A1 (ja) | マルチキャリア通信における無線通信基地局装置、無線通信移動局装置、および、パイロット信号系列割当方法 | |
JPWO2008084810A1 (ja) | 無線通信基地局装置および制御信号のマッピング方法 | |
WO2007129621A1 (ja) | マルチキャリア通信における無線通信基地局装置および無線通信方法 | |
WO2006137495A1 (ja) | マルチキャリア通信における無線通信基地局装置および無線通信方法 | |
US7580345B2 (en) | Radio transmitting apparatus and radio transmitting method | |
JP4879316B2 (ja) | 送信装置及び送信方法 | |
JP4859959B2 (ja) | 受信装置及び受信方法 | |
WO2011155472A1 (ja) | 無線通信システム、送信装置および送信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680021596.7 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007521331 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006766734 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11917758 Country of ref document: US Ref document number: 2119/MUMNP/2007 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2006766734 Country of ref document: EP |