WO2004047338A1 - 基地局装置および再送パケットの送信電力制御方法 - Google Patents
基地局装置および再送パケットの送信電力制御方法 Download PDFInfo
- Publication number
- WO2004047338A1 WO2004047338A1 PCT/JP2003/014627 JP0314627W WO2004047338A1 WO 2004047338 A1 WO2004047338 A1 WO 2004047338A1 JP 0314627 W JP0314627 W JP 0314627W WO 2004047338 A1 WO2004047338 A1 WO 2004047338A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transmission power
- transmission
- station apparatus
- packet
- retransmission
- Prior art date
Links
Classifications
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
-
- 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
-
- 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
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Definitions
- the present invention relates to a base station apparatus used in a radio communication system that performs downlink high-speed packet transmission, and a transmission power control method for retransmission packets.
- a downlink high-speed packet transmission system In the field of wireless communication, a downlink high-speed packet transmission system has been developed in which a plurality of mobile station apparatuses share high-speed, large-capacity downlink channels, and a base station apparatus transmits a bucket to the mobile station apparatus.
- scheduling technology and adaptive modulation technology are used to improve transmission efficiency.
- the scheduling technology is a technology in which the base station apparatus sets a mobile station apparatus to be a transmission destination of the high-speed packet downlink for each time slot, and assigns a packet to be transmitted to the mobile station apparatus.
- the adaptive modulation technique is a technique that adaptively determines a modulation scheme or an error correction coding scheme (M c S: Modulation and Coding Scheme) according to the state of the propagation path of the mobile station apparatus that transmits packets. Also, in wireless communication systems that perform high-speed packet transmission, ARQ (Automatic Repeat Request), in particular H-ARQ (Hybrid-Automatic Repeat Request), is used to improve the reception performance of the day.
- ARQ Automatic Repeat Request
- H-ARQ Hybrid-Automatic Repeat Request
- a base station apparatus and a mobile station apparatus are connected by a bidirectional transmission path, and the base station apparatus sends a packet including a code word generated by performing error detection coding on information bits to the mobile station apparatus.
- the mobile station apparatus detects an error.
- the mobile station apparatus returns an acknowledgment signal (Positive Acknowledgment: ACK signal) indicating that it has been correctly received to the base station apparatus when no error is detected in the received packet, and when an error is detected in the received data.
- Retransmission request signal (Negative Acknowledgement: NACK signal) is sent back to the base station apparatus.
- the base station apparatus retransmits the same packet upon receiving the NACK signal.
- the base station apparatus repeats retransmission of the same packet until it receives an ACK signal.
- the base station apparatus transmits a first packet and the mobile station apparatus correctly receives this first packet, it transmits an ACK signal to the base station apparatus.
- the base station device receives this ACK signal, it then transmits a second packet.
- the mobile station device receives this second packet in error, it transmits a NACK signal to the base station device.
- the base station device receives the NACK signal from this mobile station device, it transmits (retransmits) the second buckett again.
- the base station apparatus retransmits the same packet unless it receives an ACK signal from the mobile station apparatus.
- ARQ achieves high quality transmission in this way.
- High quality transmission can be realized in the above-mentioned ARQ, but the propagation delay may be increased by repeating retransmission.
- the error rate increases with the delay, so the number of retransmissions increases and the propagation delay increases sharply.
- H-ARQ is used in a wireless communication system that performs high-speed bucket transmission.
- H-ARQ is a system that combines an ARQ with an error correction code, and aims to improve throughput by reducing the number of retransmissions by improving the error rate of the received signal using error correction.
- Two methods, Chase Combining type and Incremental Redundant type, have been proposed as powerful methods for this H-ARQ.
- the Chase Combining type H-AR Q (hereinafter referred to as “ ⁇ 0 type 11-1 (referred to as 3”)) is characterized in that the base station apparatus retransmits the same packet as the previously transmitted packet.
- the mobile station apparatus When receiving the retransmitted packet, the mobile station apparatus combines the packet received up to the previous time and the packet retransmitted this time, Error correction decoding is performed on the signal.
- CC type H-ARQ since the codeword included in the packet received up to the previous time and the codeword included in the packet retransmitted this time are combined to improve the reception level, each time the retransmission is repeated. Error rate performance is improved. This makes it possible to improve the throughput because there are no errors with the number of retransmissions less than that of normal ARQ.
- Type H-ARQ (hereinafter referred to as "IR type H-ARQ”) is a packet configured by the base station apparatus to include a parity bit different from the parity bit contained in the packet transmitted up to the previous time. It is characterized by resending. The mobile station apparatus holds each received parity bit in a buffer, and when receiving a retransmission packet, the parity bit contained in the packet received up to the previous time and the parity bit contained in the packet received at retransmission are Used together, error correction decoding is performed.
- the IR type since the parity bit used for error correction decoding is added (incremented) at each retransmission, the error correction capability of the mobile station apparatus is improved.
- the error rate characteristic is improved each time retransmission is repeated. Be improved. This makes it possible to improve throughput by eliminating errors with the number of retransmissions smaller than that of a normal A R Q.
- retransmission packets are used as a supplement to the initial transmission packets in improving the error rate performance.
- the following outlines the operations of the base station apparatus and mobile station apparatus of a wireless communication system that performs high-speed packet transmission.
- the base station apparatus predicts the channel quality based on the downlink state report value transmitted from each mobile station apparatus, and transmits it to each time slot with the mobile station apparatus with the best channel quality as the transmission destination. Allocate packets ahead. Then, the base station apparatus performs error correction coding and modulation on the packet according to the information indicating the scheduling result and the scheme determined by the scheduling, and transmits the packet to the mobile station apparatus serving as the transmission destination.
- Each mobile station apparatus based on the information indicating the received scheduling result, Demodulation is performed in the time slot to which the packet addressed to the own station is assigned, CRC detection etc. are performed, and if the packet data can be correctly demodulated, an ACK signal indicating this is transmitted.
- each mobile station apparatus requests packet data retransmission by transmitting a NACK signal indicating this to the base station apparatus when there is an error in the packet data and the packet data can not be demodulated correctly. .
- the base station apparatus transmits the next packet when receiving the A C K signal, and retransmits the same packet when receiving the N A C K signal.
- the high-speed downlink packet transmission scheme efficiently transmits packets by sharing one channel among all mobile station apparatuses present in a cell or sector, it is possible to effectively utilize code resources. it can.
- MCS is optimized according to the reception quality (for example, E c / N 0, SIR, CIR, etc.) of the packet received by the mobile station apparatus.
- reception quality for example, E c / N 0, SIR, CIR, etc.
- the document “Comparison of Hybrid AR ⁇ Packet Combining Algorithm in High Speed Downlink Packet Access in a Multipath Fading Channel, IEICE TRANS. FUNDAMENTALS, VOL.E85-A, NO.7, JULY 2002, pp. 1557-1568” Is disclosed in In this document, the transmission power of the downlink packet is always assumed to be constant regardless of the time of initial transmission and retransmission, as shown in FIG.
- the mobile station apparatus receives as much as the first transmission at the time of retransmission. Quality is not required. Nevertheless, if the transmission power of the downlink packet is always constant regardless of the time of initial transmission and retransmission as in the above-mentioned document, extra transmission power is used at the time of retransmission, and transmission power resources It is not appropriate in terms of effective use. Disclosure of the invention
- the base station apparatus transmits the transmission power of the retransmission packet such that the reception quality of the retransmission packet in the mobile station apparatus is lower than the reception quality of the first transmission packet in the mobile station apparatus. Control to the power value. This enables effective use of transmission power resources and reduces interference to the wireless communication system.
- FIG. 1 is a diagram showing conventional transmission power.
- FIG. 2 is a block diagram showing a configuration of a base station apparatus according to Embodiment 1 of the present invention.
- FIG. 3 is a block diagram showing a configuration of a mobile station apparatus according to Embodiment 1 of the present invention.
- FIG. 4 is a block diagram showing an internal configuration of a scheduler of the base station apparatus according to Embodiment 1 of the present invention.
- FIG. 5 is a diagram showing transmission power control according to Embodiment 1 of the present invention.
- FIG. 6 is a diagram showing transmission power control according to Embodiment 2 of the present invention.
- FIG. 7 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to Embodiment 3 of the present invention.
- FIG. 8 is a diagram showing changes in downlink quality according to Embodiment 3 of the present invention.
- FIG. 9 is a diagram showing transmission power control according to Embodiment 3 of the present invention.
- FIG. 10 is a diagram showing received power according to Embodiment 3 of the present invention.
- FIG. 11 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to Embodiment 4 of the present invention.
- FIG. 12 is a graph showing the relationship between S IR per transmission and FER (Frame Error Rate) when the modulation scheme according to Embodiment 4 of the present invention is QP SK.
- FIG. 13 is a table showing the correspondence between the number of retransmissions and the IR gain according to Embodiment 4 of the present invention.
- FIG. 14 is a diagram showing transmission power control according to the fourth embodiment of the present invention.
- FIG. 15 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to Embodiment 5 of the present invention.
- FIG. 16 is a diagram showing transmission power control according to Embodiment 5 of the present invention.
- FIG. 17 is a diagram showing received power according to Embodiment 5 of the present invention.
- FIG. 18 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to Embodiment 6 of the present invention.
- FIG. 19A is a diagram showing transmission power control according to Embodiment 6 of the present invention.
- FIG. 19B is a diagram showing transmission power control according to Embodiment 6 of the present invention.
- FIG. 19C is a diagram showing transmission power control according to Embodiment 6 of the present invention.
- FIG. 19D is a diagram showing transmission power control according to Embodiment 6 of the present invention.
- high speed downlink packet access (HSDPA) is used as an example of the high speed downlink packet transmission method.
- HSDPA High Speed-Physical Downlink Shared Channel
- SCCH Shared Control Channel of HS-PDSCH
- A-DPCH Associated-Dedicated Physical Channel for HS-PDSCH
- HS-DPCCH High Speed-Dedicated Physical Control Channel
- HS-PDS is a downstream shared channel used to transmit packets.
- HS-SCCHH ⁇ shared channel in the downlink direction, and information on resource allocation (TFR I: Transport-format and Resource related Information), information on H-ARQ control, etc. are transmitted.
- TFR I Transport-format and Resource related Information
- A— DPCH is an uplink and downlink dedicated additional channel, and its channel configuration and handover control are the same as DP CH.
- pilot signals, TPC commands, etc. are transmitted.
- Uplink HS The DP CCH transmits an ACK / NACK signal and a CQ I (Channel Quality Indicator) signal.
- the CQ I signal is a signal that indicates the modulation scheme and coding rate of packet data that can be demodulated in the mobile station apparatus, and plays a role of a report value for reporting a lower link status.
- FIG. 2 is a block diagram showing a configuration of a base station apparatus according to Embodiment 1 of the present invention.
- the duplexer 102 outputs the signal received by the antenna 101 to the reception RF unit 103.
- the duplexer 102 wirelessly transmits the signal output from the transmission RF unit 166 from the antenna 101.
- Reception RF section 103 converts the radio frequency reception signal output from duplexer 102 into a baseband digital signal, and outputs the result to demodulation section 104.
- Demodulation section 104 is prepared for the number of mobile station apparatuses performing wireless communication, performs demodulation processing such as despreading, RAKE combining, error correction decoding and the like on the reception baseband signal, and outputs the result to demultiplexing section 105.
- demodulation processing such as despreading, RAKE combining, error correction decoding and the like
- the separation unit 105 separates the output signal of the demodulation unit 104 into a delay and a control signal.
- the control signal separated by separation section 105 includes DL (Down Link) T.
- PC command, CQI signal, ACK / NACK signal, etc. are included.
- CQI signal And the ACKZ NACK signal are output to the scheduler 151, and the DL TPC command is output to the transmission power control unit 158.
- the SIR measurement unit 106 is prepared for the number of mobile station apparatuses performing wireless communication, measures uplink reception SIR according to the desired wave level and interference wave level measured in the demodulation process, and indicates the SIR Is output to the TPC command generation unit 107. .
- T PC command generation section 107 is prepared for the number of mobile station apparatuses performing radio communication, and instructs increase / decrease of transmission power of uplink according to the magnitude relationship between reception S IR of uplink and target S IR.
- Link (TPC) command is generated.
- the scheduler 151 determines a mobile station apparatus that transmits a packet based on a packet transmission control signal, a C QI signal from each mobile station apparatus, and an ACK / NACK signal, and indicates the mobile station apparatus and a bucket data to be transmitted. Outputs information to buffer (Queue) 152. Also, scheduler 151 determines the modulation scheme, coding rate and code multiplexing number based on the CQ I signal from the mobile station apparatus, and instructs modulation section 153.
- the scheduler 151 also determines the transmission power of the packet data based on the AC K / N ACK signal from the mobile station apparatus, and outputs a signal indicating the transmission power to the transmission power control unit 154.
- the scheduler 151 also outputs a signal (hereinafter referred to as “HS-SCCH signal”) to be transmitted to the mobile station apparatus by the HS-SCCH to the amplification section 161.
- the HS-SCCH signal includes the time to transmit the packet data, the packet data coding rate, and information (TFRI) indicating the modulation method.
- TFRI information
- the buffer 152 outputs the bucket bucket data for the mobile station apparatus instructed by the scheduler 151 to the modulation unit 153.
- the modulation unit 153 performs error correction coding, modulation, and spreading on the packet data according to the instruction of the scheduler 151, and outputs the result to the amplification unit 155.
- the transmission power control unit 154 controls the amplification amount of the amplification unit 155 to The transmission power of the output signal of the modulation unit 153 is controlled to be a value determined by the scheduler 151.
- the output signal of the amplification unit 155 is a signal transmitted on the HS-PDSCH, and is output to the multiplexing unit 165.
- Multiplexing section 156 is prepared for the number of mobile station apparatuses performing wireless communication, and multiplexes pilot signals and TPC commands for UL on individual signals (including control signals) to be transmitted to each mobile station apparatus and modulates them. Output to 157.
- the modulation units 157 are prepared as many as the number of mobile station apparatuses performing radio communication, perform error correction coding, modulation and spreading on the output signal of the multiplexing unit 1 56, and output the result to the amplification unit 1 59.
- the transmission power control unit 158 is prepared for the number of mobile station apparatuses performing wireless communication, and controls the transmission power of the output signal of the modulation unit 157 by controlling the amplification amount of the amplification unit 159 according to the DL TPC command. Also, the transmission power control unit 158 outputs a signal indicating the transmission power value to the transmission power control unit 160.
- the signal amplified by the amplification unit 159 is a signal transmitted on DPCH (including A-DPCH), and is output to the multiplexing unit 165.
- the transmission power control unit 160 controls the amplification amount of the amplification unit 161 with a value obtained by adding an offset to the transmission power value of the transmission power control unit 158, to thereby transmit the transmission power of the HS-SCCH signal output from the scheduler 151. Control.
- the signal amplified by the amplifier unit 61 is a signal transmitted on the HS-SCCH, and is output to the multiplex unit 165.
- the transmission power control unit 160 may correct the offset value based on the retransmission state or the like.
- the modulator 162 performs error correction coding, modulation and diffusion on the common control data, and outputs the result to the amplifier 164.
- the transmission power control unit 163 controls the transmission power of the output signal of the modulation unit 162 by controlling the amplification amount of the amplification unit 164.
- the output signal of the amplification unit 164 is a signal transmitted by CPI CH or the like, and is output to the multiplexing unit 165.
- the multiplexing unit 165 includes an amplification unit 155, an amplification unit 159, an amplification unit 161, and an amplification.
- the output signals of the section 164 are multiplexed and output to the transmission RF section 166.
- the transmission RF unit 166 converts the baseband digital signal output from the modulation unit 159 into a radio frequency signal and outputs the signal to the duplexer 102.
- FIG. 3 is a block diagram showing the configuration of a mobile station apparatus that performs wireless communication with the base station apparatus shown in FIG.
- Mobile station apparatus 200 in FIG. 3 receives individual data, common control data, packet data, and HS-SCCH signals from base station apparatus 100.
- each component of the mobile station apparatus 200 of FIG. 3 will be described.
- the duplexer 202 outputs the signal received by the antenna 201 to the reception RF unit 203. In addition, the duplexer 202 wirelessly transmits the signal output from the transmission RF unit 258 from the antenna 201.
- Reception RF section 203 converts the received signal of the radio frequency output from duplexer 202 into a baseband digital signal, and outputs the signal of HS-PD S CH to buffer 204, so that HS _ SC
- the CH signal is output to the demodulation unit 205, the DPCH signal is output to the demodulation unit 208, and the signal of the common control channel is used as a CIR (Carrier to Interference Ratio) measurement unit 212.
- CIR Carrier to Interference Ratio
- the buffer 204 temporarily stores the signal of the HS-PDSCH and outputs the signal to the demodulator 206.
- the demodulation unit 205 performs demodulation processing such as despreading, RAKE combining, error correction decoding, etc. on the 153_3 11 11 1 1 signal, and arrives at the packet arrival timing for the own station, the coding rate of the packet destination, and modulation. Information necessary for demodulation of packet data, such as a scheme, is acquired and output to the demodulation unit 206.
- demodulation processing such as despreading, RAKE combining, error correction decoding, etc.
- the demodulation unit 206 performs demodulation processing such as despreading, RAKE combining, error correction decoding, and the like on the HS-PD S CH signal stored in the buffer based on the information acquired by the demodulation unit 205.
- the packet data obtained by the demodulation processing is output to the error detection unit 207.
- the error detection unit 207 performs error detection on the packet data output from the demodulation unit 206, and when no error is detected, an error occurs in the ACK signal. If not detected, the NACK signal is output to the multiplexing unit 251.
- the demodulation unit 208 performs demodulation processing such as despreading, RAKE combining, and error correction decoding on the DP CH signal, and outputs the result to the separation unit 209.
- the separation unit 209 separates the output signal of the demodulation unit 208 into data and a control signal.
- the control signal separated by separation section 209 includes a UL TPC command and the like.
- the TPC command for UL is output to the transmission power control unit 257.
- the SIR measurement unit 210 measures the reception SIR of the downlink based on the desired wave level and the interference wave level measured in the process of demodulation, and outputs all the measured reception SIRs to the TPC command generator 211.
- the TPC command generation unit 211 generates a TPC command for DL based on the magnitude relationship between the received S IR output from the S I R measurement unit 210 and the target S IR, and outputs the TPC command to the multiplexing unit 254.
- the CIR measurement unit 212 measures the CIR using the signal of the common control channel from the base station apparatus, and outputs the measurement result to the CQI generation unit 213.
- CQI generating section 213 generates a CQ I signal based on the C I R of the signal transmitted from the base station apparatus, and outputs the CQ I signal to multiplexing section 251.
- the multiplexing unit 251 multiplexes the CQ I signal and the ACK / NACK signal and outputs the multiplexed signal to the modulation unit 252.
- Modulator 252 performs error correction coding, modulation and spreading on the output signal of multiplexer 251 and outputs the result to multiplexer 256.
- Modulating section 253 performs error correction coding, modulation and spreading on the data to be transmitted to base station apparatus 100, and outputs the result to multiplexing section 256.
- the multiplexing unit 254 multiplexes the DL TPC command and pilot signal and outputs the multiplexed signal to the modulation unit 255.
- Modulator 255 performs error correction coding, modulation and spreading on the output signal of multiplexer 254 and outputs the result to multiplexer 256.
- the multiplexing unit 256 multiplexes each output signal of the modulation unit 252, the modulation unit 253 and the modulation unit 255, and outputs the multiplexed output signal to the transmission RF unit 258.
- the transmission power control unit 257 transmits the RF unit 25 according to the TPC command for UL. By controlling the amplification amount of 8, the transmission power of the output signal of the multiplexer 256 is controlled.
- the transmission power control unit 2507 When connected to a plurality of base station apparatuses, the transmission power control unit 2507 performs control to increase transmission power only when all UL TPC commands indicate an increase in transmission power.
- the transmission RF unit 258 amplifies the baseband digital signal output from the multiplexing unit 256, converts it into a radio frequency signal, and outputs the signal to the duplexer 102.
- the transmission RF unit 258 amplifies the baseband digital signal output from the multiplexing unit 256, converts it into a radio frequency signal, and outputs the signal to the duplexer 102.
- the scheduler 151 mainly includes a transmission destination determination unit 301, an MCS determination unit 302, a transmission power determination unit 303, and an HS-SCCH signal generation unit 304.
- the transmission destination determination unit 301 selects each mobile station apparatus as a candidate for transmitting a buckett from the packet transmission control signal, and the mobile station apparatus of the packet transmission destination is selected based on the CQ I signal from each selected mobile station apparatus. decide. For example, based on the CQ I signal, the mobile station apparatus with the best reception quality is determined as the packet transmission destination. Then, the transmission destination determination unit 301 outputs information indicating the mobile station apparatus that has become the transmission destination to the buffer 152, the MCS determination unit 302, and the H S S C CH signal generation unit 304. Also, the transmission destination determination unit 301 instructs the buffer 152 to transmit a new packet when an ACK signal is input, and to retransmit a buckett transmitted last time when an NAC signal is input.
- the MCS determination unit 302 performs MCS selection (determination of modulation scheme, coding rate and code multiplexing number) based on the CQ I signal of the mobile station apparatus, and instructs the modulation unit 153 on the MCS and HS-SC. Input to the CH signal generation unit 304.
- the transmission power determination unit 303 makes the transmission power of the packet different depending on whether the ACK signal is received from the mobile station apparatus or the N ACK signal, and the reception quality of the retransmission packet in the mobile station apparatus (for example, Make Ec / N0, SIR, CIR, etc. lower than the reception quality of the initial transmission packet. Specifically When the transmission power determination unit 303 receives an ACK signal, as shown in FIG.
- the transmission power of the first transmission packet (transmission # 1) to be transmitted next is set to a predetermined value P (1) [dB] Decide on.
- the transmission power of the first retransmission bucket (transmission # 2) is the first transmission packet (transmission Determine the value to be lower than the transmission power P (1) of # 1) by a predetermined value X [dB] than [dB].
- the transmission power of the second retransmission packet (transmission # 3) is also transmitted for the first time, as shown in FIG.
- the value is determined to be lower than the transmission power P (1) [dB] of the packet (transmission # 1) by a predetermined value X [dB]. That is, the transmission power of the first retransmission packet (transmission # 2) and the transmission power of the second retransmission packet (transmission # 3) are both the transmission power of the first transmission packet (transmission # 1) P (1) [dB The value is determined to be lower than the predetermined value X [dB]. In this way, the transmission power determination unit 303 makes the transmission power of the retransmission packet lower than the transmission power of the first transmission packet for the HS-PD S CH, so that the reception quality of the retransmission packet at the mobile station apparatus can be obtained. Lower than the reception quality of the initial transmission packet.
- transmission power determination section 303 outputs a signal indicating the determined transmission power to transmission power control section 154.
- the transmission power control unit 154 controls the transmission power of the retransmission packet to a value lower by X [dB] than the transmission power of the first transmission packet.
- the HS-SCCH signal generation unit 304 generates a signal 113-3 ( ⁇ 11 signal for the mobile station apparatus including the M 03 selected by the MCS determination unit 302, and outputs the signal to the amplification unit 161.
- the reception quality of the retransmission packet in the mobile station apparatus is higher than the reception quality of the first transmission packet.
- the error rate characteristic is improved by performing H-ARQ. be able to. That is, in the mobile station apparatus that performs H-ARQ, retransmission packets are used as an adjunct to the initial transmission packet, so there is no particular problem in improving the error rate performance even if the reception quality of retransmission buckets is low. .
- the base station apparatus changes the transmission power reduction width of the retransmission packet for the first transmission packet according to the number of retransmissions. That is, as the number of retransmissions increases, the transmission power is lowered.
- the transmission power determination unit 303 shown in FIG. 4 receives the ACK signal
- the first transmission packet to be transmitted next (transmission # 1) Determine the transmission power of the specified value P (1) [dB].
- the transmission power of the first retransmission packet (transmission # 2) is the first transmission packet (transmission Determine the value to be lower than the transmission power P (1) [dB] of # 1) by a predetermined value X (2) [dB].
- a NACK signal is further received for the first retransmission packet (transmission # 2), as shown in FIG.
- the transmission power of the second retransmission packet (transmission # 3) is used as the first transmission packet. Determine the value to be lower than the transmission power P (1) [dB] of (Transmission # 1) by a predetermined value X (3) [dB] (> X (1) [dB]). That is, as the number of retransmissions increases, the transmission power of retransmission packets is gradually lowered.
- the transmission power of retransmission packets is gradually lowered. This can further reduce the interference given to the wireless communication system and further save the use of transmission power resources.
- FIG. 7 is a block diagram showing the internal configuration of the scheduler of the base station apparatus according to the present embodiment, which adopts a configuration in which CQ I difference calculating section 305 is added as compared with FIG.
- ⁇ 31 difference calculation unit 305 determines the difference between the CQ I value at the time of initial transmission and the CQ I value at the time of retransmission based on the input CQ I signal, and determines the difference between this CQ I value as the transmission power determination unit Input to 303.
- the transmission power determination unit 303 determines the transmission power of the retransmission packet using the difference between the input CQ I values.
- the mobile station apparatus transmits to the base station apparatus a CQ I signal corresponding to a combination of modulation scheme and coding rate determined in accordance with the downlink quality, it can be said that the CQ I signal indicates lower channel quality. .
- the CQ I signal is indicated by CQ I values of, for example, '1' to '30' according to the downlink quality, and the larger the value, the better the downlink quality.
- the difference in CQ I values is almost equal to the difference in dB. Therefore, the difference between the CQ I value at the time of the first transmission and the CQ I value at the time of retransmission is obtained by The difference with the line quality can be calculated in dB.
- the 0 ⁇ 31 difference calculating unit 305 obtains the difference between the CQI value at the time of initial transmission and the CQ I value at the time of retransmission. That is, the difference between the CQ I value of the first transmission packet (send # 1), CQ I (1), and the CQ I value of the first retransmission packet (send # 2), CQ I (2) CQ I— d (2) is calculated by the following equation (1).
- CQ I-d (2) CQ I (1)-CQ I (2) to (1)
- CQ I (2) is smaller than CQ I (1) because the downlink quality is worse at the first retransmission (send # 2) than at the first send (send # 1). It becomes a value, and as a result, CQ I ⁇ d (2) becomes a positive value.
- CQI (1) which is the CQI value of the first transmission bucket (send # 1)
- CQ I (3 which is the CQ I value of the second retransmission packet (send # 3)
- CQ I— d (3) is calculated by the following equation (2).
- CQ I (3) is larger than CQ I (1) because the downlink quality is better in the second retransmission (transmission # 3) than in the first transmission (transmission # 1). It becomes a value, and as a result CQ I ⁇ d (3) becomes a negative value.
- transmission power determination section 303 determines the transmission power of the retransmission packet as shown in FIG. That is, assuming that the transmission power at the first transmission (transmission # 1) is P (1) [dB], the transmission power value P (2) of the first retransmission packet (transmission # 2) is given by the following equation (3) Also, the transmission power value P (3) of the second retransmission packet (transmission # 3) is given by the following equation (4). Note that X [dB] in the following equations (3) and (4) is the same as the predetermined value X [dB] described in the first embodiment.
- the transmission power determination unit 303 determines the difference between the CQ I value at the time of initial transmission and retransmission, as in the above equations (3) and (4), that is, the downlink quality at transmission of the initial transmission packet and retransmission packet transmission. Since the transmission power of the retransmission packet is determined according to the difference between the downlink channel quality and the downlink channel quality, the mobile station apparatus can, as shown in FIG. 10, even if the downlink channel quality changes between the initial transmission and retransmission.
- HS For PD S CH, the received power of the retransmitted packet (received quality) is the received power of the first transmitted packet (received The quality is always lower than the specified value by X [dB].
- the transmission power of the retransmission packet is determined in consideration of the change in the downlink quality.
- the reception quality of the retransmission packet at the mobile station apparatus can always be lower than the reception quality of the first transmission packet by a predetermined value.
- FIG. 11 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to the present embodiment, and employs a configuration in which an IR gain determination unit 306 is added as compared with FIG.
- a signal indicating the modulation scheme determined by the MCS determination unit 302 is input to the IR gain determination unit 306. Also, an ACKZ NACK signal is input. Then, when the NACK signal is input (that is, in the case of retransmission), the IR gain determination unit 306 obtains the gain (IR gain) of the IR H-ARQ for the CC H-ARQ, and the IR gain thereof. The signal shown is input to the transmission power determination unit 303. The transmission power determination unit 303 determines the transmission power of the retransmission packet using the input IR gain.
- FIG. 12 is a graph showing the relationship between SIR per transmission and FER (Frame Error Rate) when the modulation method is QP SK.
- This graph shows the received SIR obtained when transmitting only once ( ⁇ ), and the received SIR obtained per transmission when transmitted twice (2 Tx) with equal power. Show.
- H-ARQ since H-ARQ is performed, transmission in two steps (two steps) is required in the mobile station apparatus per one transmission as compared to the case where transmission is performed only once (one step).
- Receive S IR can be reduced.
- the IR of IR type H-ARQ can be further reduced relative to the SIR of CC type H-ARQ, and the difference between the SIRs is the IR gain.
- This IR gain increases as the number of retransmissions increases. However, as the number of retransmissions increases, the coding rate at the mobile station apparatus gradually decreases, and the IR gain is almost constant after all the coded bits of systematic bit and parity bit are received at the mobile station apparatus. become.
- the IR gain can be obtained not only by a coding method in which coding bits are divided into systematic bits and parity bits (even-by-one coding), but also by convolutional coding or the like.
- a table indicating the correspondence between the number of retransmissions and the IR gain as shown in FIG. 13 is set for each modulation method.
- the mobile station in order to set the amount of reduction of the transmission power of the retransmission packet to the IR gain according to the number of retransmissions, when using I; type H-ARQ as H-ARQ, the mobile station It is possible to reduce the interference to the wireless communication system while saving the use of transmission power resources while maintaining the reception quality at the device higher than the reception quality when CC type H-ARQ is used.
- FIG. 15 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to the present embodiment, and in addition to FIG. 4, 31 ⁇ 31 difference calculation section 3 05 and IR gain determination section 306 are added. Take the configuration.
- the CQ I difference calculator 305 shown in FIG. 15 is the same as the CQ I difference calculator 305 shown in FIG. 7 and the IR gain determiner 306 shown in FIG. Since they are the same as the shown IR gain determination unit 3, the description of these will be omitted.
- transmission power determination section 303 uses the difference between the CQ I values determined by CQ I difference calculation section 305 and the IR gain determined by IR gain determination section 306 to retransmit a packet. Determine the transmission power of
- the transmission power value P (2) of the first retransmission packet (transmission # 2) is The second retransmission packet (sent #).
- the transmission power value P (3) of 3) is given by the following equation (6).
- CQ I- d (2) and CQ I- d (3) are the same as CQ I- d (2) and CQI- d described in the third embodiment. It is identical to (3), and Y (2) and Y (3) are identical to Y (2) and Y (3) described in the fourth embodiment.
- the transmission power determination unit 303 performs initial transmission and retransmission as in the above equations (5) and (6). Since the CIQ value at the time of transmission (that is, the difference between the downlink quality at the time of transmitting the first transmission packet and the downlink quality at the time of retransmission packet transmission) and the IR gain, the transmission power of the retransmission packet is determined. — When IR type H—ARQ is used as ARQ, even if the downlink quality changes between the initial transmission and retransmission, the mobile station apparatus will not receive HS-PDSCH, as shown in FIG. As the number of retransmissions increases, the reception power (reception quality) of retransmission packets decreases.
- the reception quality of the retransmission packet at the mobile station apparatus can be always lower than the reception quality of the first transmission packet, in order to determine the transmission power of the retransmission packet in consideration of the change in I and the IR gain.
- FIG. 18 is a block diagram showing an internal configuration of a scheduler of a base station apparatus according to the present embodiment, and employs a configuration in which an IR gain determination unit 306 is added as compared with FIG.
- the IR gain determination unit 306 shown in FIG. 18 is the IR gain determination unit shown in FIG. Since this is the same as 3 0 6, the explanation about this is omitted.
- transmission power determination unit 3003 determines the transmission power of the retransmission packet using the IR gain determined by IR gain determination unit 306, and provides a signal indicating the determined transmission power. Output to transmit power control unit 1 5 4. Also, the transmission power determination unit 303 knows in advance the total amount of transmission power resources (total transmission power), and by subtracting the determined transmission power from this total transmission power, the amount of surplus transmission power resources (surplus Calculate the transmission power). Then, a signal indicating the surplus transmission power is input to the transmission destination determination unit 301.
- the transmission destination determining unit 301 After determining one mobile station apparatus as a packet transmission destination, the transmission destination determining unit 301 adds another mobile station apparatus to the packet transmission destination if there is surplus transmission power. That is, the surplus transmission power is allocated to other packets to be transmitted to other mobile station apparatuses. Thereby, when there is surplus transmission power, a plurality of different packets for a plurality of mobile station apparatuses are code-multiplexed and simultaneously transmitted.
- the transmission destination determination unit 301 increases the number of packets to be transmitted to the one mobile station apparatus if there is surplus transmission power. . That is, the surplus transmission power is allocated to other packets transmitted to the same mobile station apparatus. Thus, when there is surplus transmission power, a plurality of different packets for the same mobile station apparatus are code-multiplexed and simultaneously transmitted.
- FIG. 19A the case of allocating surplus transmission power to other packets to be transmitted to other mobile station apparatuses will be described as an example using FIG. 19A to FIG.
- mobile station devices A to C there are three mobile station devices, mobile station devices A to C.
- Figure 1 9 A Transmit power of 11 3 _ 0 3 0 11 distributed to the mobile station device
- Figure 1 9 B Transmit power of HS-PDSCH distributed to the mobile station device B
- Figure 1 9 C The transmission power of the HS—PDSCH allocated to the mobile station apparatus C
- FIG. 19D respectively indicate the total transmission power of the HS—PDSCH allocated to the mobile station apparatuses A to C.
- the determination of the transmission power for mobile station apparatus A is performed in the same manner as in the fourth embodiment.
- the transmission power allocated to mobile station apparatus A decreases by Y (2) from the time of initial transmission (FIG. 19A). That is, surplus transmission power Y (2) is generated. This surplus transmission power Y (2) is allocated to the mobile station apparatus B (FIG. 19B). Therefore, in the first retransmission (transmission # 2), the packet to the mobile station A and the bucket ⁇ to the mobile station B are code-multiplexed and transmitted (FIG. 19D).
- the transmission power allocated to the mobile station apparatus A decreases by Y (3) from the time of the first transmission (FIG. 19A;). That is, surplus transmission power Y (3) is generated. This surplus transmission power Y (3) is distributed to the mobile station apparatus C (Fig. 19C). Therefore, in the second retransmission (transmission # 3), a packet to the mobile station apparatus A and a packet to the mobile station apparatus C The packets are code-multiplexed and transmitted (as shown in the figure, by allocating the excess transmission power to other packets to other mobile station apparatuses, the base station apparatus transmits HS-PDSCH signals). The transmission power is always constant at the total transmission power (FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/516,364 US20050186983A1 (en) | 2002-11-20 | 2003-11-18 | Base station apparatus, and method for controlling transmission power for retransmitted packets |
EP03774034A EP1519498A1 (en) | 2002-11-20 | 2003-11-18 | Base station apparatus, and method for controlling transmission power for retransmitted packets |
AU2003284559A AU2003284559A1 (en) | 2002-11-20 | 2003-11-18 | Base station apparatus, and method for controlling transmission power for retransmitted packets |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-337208 | 2002-11-20 | ||
JP2002337208A JP3679089B2 (ja) | 2002-11-20 | 2002-11-20 | 基地局装置および再送パケットの送信電力制御方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004047338A1 true WO2004047338A1 (ja) | 2004-06-03 |
WO2004047338A9 WO2004047338A9 (ja) | 2004-08-19 |
Family
ID=32321835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/014627 WO2004047338A1 (ja) | 2002-11-20 | 2003-11-18 | 基地局装置および再送パケットの送信電力制御方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20050186983A1 (ja) |
EP (1) | EP1519498A1 (ja) |
JP (1) | JP3679089B2 (ja) |
CN (1) | CN1692580A (ja) |
AU (1) | AU2003284559A1 (ja) |
WO (1) | WO2004047338A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7995512B2 (en) * | 2005-09-28 | 2011-08-09 | Lg Electronics Inc. | Method of transmitting data in cellular networks using cooperative relaying |
EP2393230A3 (en) * | 2010-06-03 | 2012-03-14 | Hitachi, Ltd. | Base station |
US8170476B2 (en) | 2004-12-22 | 2012-05-01 | Siemens Aktiengesellschaft | Emission power control for packet transmission |
CN103797741A (zh) * | 2011-09-15 | 2014-05-14 | 高通股份有限公司 | 使用经动态调整的测量功率偏移的信道质量报告 |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6693910B2 (en) * | 2002-06-28 | 2004-02-17 | Interdigital Technology Corporation | System and method for avoiding stall of an H-ARQ reordering buffer in a receiver |
JP2004343524A (ja) * | 2003-05-16 | 2004-12-02 | Mitsubishi Electric Corp | 基地局、移動局、通信システムおよび通信方法 |
JP4168349B2 (ja) * | 2003-07-14 | 2008-10-22 | ソニー株式会社 | 情報提供方法、情報提供装置及び情報提供プログラム |
EP1583272B1 (en) * | 2004-04-01 | 2008-12-24 | Panasonic Corporation | Interference limitation for uplink retransmissions |
EP1748591A4 (en) * | 2004-04-30 | 2008-11-12 | Sharp Kk | RADIO COMMUNICATION SYSTEM |
US7697469B2 (en) * | 2004-05-12 | 2010-04-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus to improve communication performance in ARQ networks |
JP4299270B2 (ja) * | 2004-06-09 | 2009-07-22 | 三星電子株式会社 | 向上した上りリンクサービスを支援する移動通信システムにおけるデータ送信のための方法及び装置 |
EP1744577B1 (en) | 2004-06-10 | 2012-09-12 | Panasonic Corporation | Communication terminal device, base station device, and radio communication system |
JP4432645B2 (ja) * | 2004-07-02 | 2010-03-17 | 富士通株式会社 | 通信装置、無線通信システム |
US9294218B2 (en) | 2004-07-16 | 2016-03-22 | Qualcomm Incorporated | Rate prediction in fractional reuse systems |
JP4568575B2 (ja) | 2004-10-15 | 2010-10-27 | 株式会社エヌ・ティ・ティ・ドコモ | パケット送信制御装置及びパケット送信制御方法 |
US7889755B2 (en) * | 2005-03-31 | 2011-02-15 | Qualcomm Incorporated | HSDPA system with reduced inter-user interference |
AU2006309356B2 (en) * | 2005-10-31 | 2010-09-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for activity detection in a telecommunication system |
CN101502151B (zh) * | 2006-02-03 | 2012-06-20 | Lg电子株式会社 | 用于在小区边缘区域中性能增强的方法 |
KR100964546B1 (ko) * | 2006-07-04 | 2010-06-21 | 삼성전자주식회사 | 통신 시스템에서 제어 방법 및 시스템 |
KR100876715B1 (ko) * | 2006-08-24 | 2008-12-31 | 삼성전자주식회사 | 통신 시스템에서 역방향 전력 제어 방법 및 장치 |
GB2442262B (en) * | 2006-09-26 | 2009-02-18 | Nec Technologies | Data transmission in cellular phone network |
KR100938088B1 (ko) | 2006-11-01 | 2010-01-21 | 삼성전자주식회사 | 무선 패킷 데이터 통신 시스템에서의 피드백 정보 송수신방법 및 장치 |
US8467367B2 (en) * | 2007-08-06 | 2013-06-18 | Qualcomm Incorporated | Multiplexing and transmission of traffic data and control information in a wireless communication system |
WO2009055969A1 (fr) * | 2007-11-01 | 2009-05-07 | Alcatel Shanghai Bell Company, Ltd. | Procédé de retransmission automatique dans un réseau de communication sans fil et dispositif apparenté |
JP5046904B2 (ja) * | 2007-12-13 | 2012-10-10 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信システム、基地局装置、ユーザ装置及び方法 |
WO2009139442A1 (ja) * | 2008-05-15 | 2009-11-19 | シャープ株式会社 | 通信装置、通信システム、受信方法及び通信方法 |
JP2009290618A (ja) * | 2008-05-29 | 2009-12-10 | Kyocera Corp | 無線通信装置および無線通信方法 |
US8139655B2 (en) * | 2008-06-09 | 2012-03-20 | Sony Corporation | System and method for effectively transferring electronic information |
JP5106454B2 (ja) * | 2009-03-18 | 2012-12-26 | 株式会社日立製作所 | 無線リソース制御方法及び基地局 |
JP5864184B2 (ja) * | 2011-09-28 | 2016-02-17 | 京セラ株式会社 | 通信システム |
JP2015056696A (ja) * | 2013-09-10 | 2015-03-23 | 株式会社東芝 | 通信装置および通信方法 |
WO2015060191A1 (ja) * | 2013-10-21 | 2015-04-30 | 京セラ株式会社 | 基地局及びプロセッサ |
EP2879418A1 (en) * | 2013-11-27 | 2015-06-03 | Nokia Corporation | D2d inter cluster communication and configurations |
CN110035486B (zh) * | 2018-01-12 | 2021-01-12 | 华为技术有限公司 | 上行发送功率调整及装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001028127A1 (en) * | 1999-10-09 | 2001-04-19 | Qualcomm Incorporated | Method and apparatus for minimising total transmission energy in a communication system by using channel quality |
JP2001217771A (ja) * | 2000-01-31 | 2001-08-10 | Sharp Corp | 無線通信装置およびその送信電力制御方法およびそれを用いた無線通信システム |
JP2001292097A (ja) * | 2000-04-06 | 2001-10-19 | Ntt Docomo Inc | マルチキャスト伝送下り送信電力制御方法及び基地局 |
JP2002009741A (ja) * | 2000-06-26 | 2002-01-11 | Ntt Docomo Inc | 自動再送要求を行う通信方法及び基地局装置 |
JP2002009692A (ja) * | 2000-06-23 | 2002-01-11 | Matsushita Electric Ind Co Ltd | データ伝送装置及びデータ伝送方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6101168A (en) * | 1997-11-13 | 2000-08-08 | Qualcomm Inc. | Method and apparatus for time efficient retransmission using symbol accumulation |
WO2001052576A1 (fr) * | 2000-01-12 | 2001-07-19 | Mitsubishi Denki Kabushiki Kaisha | Terminal de communications mobiles |
SG109450A1 (en) * | 2000-04-06 | 2005-03-30 | Ntt Docomo Inc | Multicast signal transmission power control method and base station using the same |
US7236740B2 (en) * | 2000-07-05 | 2007-06-26 | Samsung Electronics Co., Ltd. | Data retransmission apparatus and method in a mobile communication system employing HARQ technique |
US6735448B1 (en) * | 2000-11-07 | 2004-05-11 | Hrl Laboratories, Llc | Power management for throughput enhancement in wireless ad-hoc networks |
US6775254B1 (en) * | 2000-11-09 | 2004-08-10 | Qualcomm Incorporated | Method and apparatus for multiplexing high-speed packet data transmission with voice/data transmission |
JP3583388B2 (ja) * | 2001-06-29 | 2004-11-04 | 松下電器産業株式会社 | データ通信装置およびデータ通信方法 |
WO2003007535A1 (en) * | 2001-07-12 | 2003-01-23 | Samsung Electronics Co., Ltd | Reverse transmission apparatus and method for improving transmission throughput in a data communication system |
US6779147B2 (en) * | 2001-09-25 | 2004-08-17 | Qualcomm, Incorporated | Method and apparatus for efficient use of communication resources in a CDMA communication system |
SG107576A1 (en) * | 2002-01-17 | 2004-12-29 | Oki Techno Ct Singapore Pte | Communication system employing turbo codes and a hybrid automatic repeat request scheme |
JP3898965B2 (ja) * | 2002-03-06 | 2007-03-28 | 株式会社エヌ・ティ・ティ・ドコモ | 無線リソース割り当て方法及び基地局 |
JP2004112597A (ja) * | 2002-09-20 | 2004-04-08 | Matsushita Electric Ind Co Ltd | 基地局装置及びパケット品質推定方法 |
US7352725B2 (en) * | 2003-08-21 | 2008-04-01 | Nokia Corporation | Communication method and arrangement in a code division multiple access (CDMA) radio system |
-
2002
- 2002-11-20 JP JP2002337208A patent/JP3679089B2/ja not_active Expired - Fee Related
-
2003
- 2003-11-18 WO PCT/JP2003/014627 patent/WO2004047338A1/ja not_active Application Discontinuation
- 2003-11-18 US US10/516,364 patent/US20050186983A1/en not_active Abandoned
- 2003-11-18 CN CNA2003801005445A patent/CN1692580A/zh active Pending
- 2003-11-18 AU AU2003284559A patent/AU2003284559A1/en not_active Abandoned
- 2003-11-18 EP EP03774034A patent/EP1519498A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001028127A1 (en) * | 1999-10-09 | 2001-04-19 | Qualcomm Incorporated | Method and apparatus for minimising total transmission energy in a communication system by using channel quality |
JP2001217771A (ja) * | 2000-01-31 | 2001-08-10 | Sharp Corp | 無線通信装置およびその送信電力制御方法およびそれを用いた無線通信システム |
JP2001292097A (ja) * | 2000-04-06 | 2001-10-19 | Ntt Docomo Inc | マルチキャスト伝送下り送信電力制御方法及び基地局 |
JP2002009692A (ja) * | 2000-06-23 | 2002-01-11 | Matsushita Electric Ind Co Ltd | データ伝送装置及びデータ伝送方法 |
JP2002009741A (ja) * | 2000-06-26 | 2002-01-11 | Ntt Docomo Inc | 自動再送要求を行う通信方法及び基地局装置 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8170476B2 (en) | 2004-12-22 | 2012-05-01 | Siemens Aktiengesellschaft | Emission power control for packet transmission |
US7995512B2 (en) * | 2005-09-28 | 2011-08-09 | Lg Electronics Inc. | Method of transmitting data in cellular networks using cooperative relaying |
EP2393230A3 (en) * | 2010-06-03 | 2012-03-14 | Hitachi, Ltd. | Base station |
CN103797741A (zh) * | 2011-09-15 | 2014-05-14 | 高通股份有限公司 | 使用经动态调整的测量功率偏移的信道质量报告 |
CN103797741B (zh) * | 2011-09-15 | 2017-02-15 | 高通股份有限公司 | 用于使用经动态调整的测量功率偏移的信道质量报告的方法和装置 |
US9924471B2 (en) | 2011-09-15 | 2018-03-20 | Qualcomm Incorporated | Channel quality reporting using a dynamically adjusted measurement power offset |
Also Published As
Publication number | Publication date |
---|---|
US20050186983A1 (en) | 2005-08-25 |
JP3679089B2 (ja) | 2005-08-03 |
EP1519498A1 (en) | 2005-03-30 |
AU2003284559A1 (en) | 2004-06-15 |
WO2004047338A9 (ja) | 2004-08-19 |
JP2004173017A (ja) | 2004-06-17 |
CN1692580A (zh) | 2005-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2004047338A1 (ja) | 基地局装置および再送パケットの送信電力制御方法 | |
JP3796212B2 (ja) | 基地局装置及び送信割り当て制御方法 | |
KR100606008B1 (ko) | 부호 분할 다중 접속 통신 시스템에서 역방향 데이터재전송 요청 송수신 장치 및 방법 | |
JP4568575B2 (ja) | パケット送信制御装置及びパケット送信制御方法 | |
EP1769593B1 (en) | Method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting uplink packet data service | |
JP4494465B2 (ja) | 無線通信方法 | |
JP4879956B2 (ja) | 移動通信システムにおける上りリンクパケットデータを送信する装置及び方法 | |
EP1326471B1 (en) | Method and apparatus for high rate packet data transmission | |
EP1592162B1 (en) | Method and apparatus for time efficient retransmission using symbol accumulation | |
WO2004028038A1 (ja) | 基地局装置及びパケット送信電力制御方法 | |
EP1980045B1 (en) | An apparatus and method for hybrid automatic repeat request | |
US8205129B2 (en) | Retransmission in a cellular communication system | |
JP4205937B2 (ja) | 制御局装置 | |
JP4113417B2 (ja) | 基地局装置および送信方法 | |
US9185723B2 (en) | Method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting uplink packet data service | |
JP2004172981A (ja) | 無線送信装置および無線送信方法 | |
WO2005104492A1 (ja) | 通信端末装置及び送信方法 | |
JP2004328397A (ja) | 基地局装置及びこの装置における信号処理方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
COP | Corrected version of pamphlet |
Free format text: PAGE 27, AMENDED CLAIMS, ADDED |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10516364 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003774034 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038A05445 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2003774034 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003774034 Country of ref document: EP |