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Base station apparatus, mobile station apparatus, and data channel scheduling method

A data channel and mobile station technology, applied in signal channels, communication between multiple stations, wireless communication, etc., can solve the problem of increased interference in adjacent cells, packet data retransmission, ACK/NACK can not receive quality to reach the base station and other issues to achieve the effect of preventing the decline in throughput

Inactive Publication Date: 2007-03-28
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the interference to adjacent cells increases, and the capacity of the downlink is suppressed at the same time
[0009] In addition, in a communication system that does not perform transmission power control on the uplink control channel, when the channel quality of the uplink control channel deteriorates due to fading or the like, when transmitting packet data to a mobile station using the uplink control channel, the The ACK / NACK of the supposedly packetized data does not reach the base station with the required reception quality
Especially for mobile stations located near cell boundaries, there is a high probability that ACK / NACK will not reach the base station with the required reception quality
As a result, retransmission of packet data occurs, and the throughput of the downlink data channel decreases

Method used

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  • Base station apparatus, mobile station apparatus, and data channel scheduling method
  • Base station apparatus, mobile station apparatus, and data channel scheduling method
  • Base station apparatus, mobile station apparatus, and data channel scheduling method

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Experimental program
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Embodiment approach 1

[0023] FIG. 2 shows the configuration of a mobile communication system according to Embodiment 1 of the present invention. As shown in the figure, a plurality of mobile station devices exist in a cell centered on the base station device. In addition, in the example of FIG. 2, the mobile communication system which consists of three cells is shown, but the number of the cells which comprise a mobile communication system is not specifically limited.

[0024] 3 is a block diagram showing the configuration of a base station apparatus according to Embodiment 1 of the present invention. Control information extraction unit 105, demodulation unit 106, decoding unit 107, MCS selection unit 108, encoding unit 109, modulation unit 109, HARQ (Hybrid Automatic Repeat Request) unit 110, modulation unit 111, encoding unit 115, modulation unit 116, And the transmission power control unit 117 constitutes the data processing units 100-1 to 100-n. Data processing units 100-1 to 100-n are set to...

Embodiment approach 2

[0057] 7 is a block diagram showing the configuration of a base station apparatus according to Embodiment 2 of the present invention. In addition, in FIG. 7, the same structure as FIG. 3 (Embodiment 1) is attached|subjected to the same code|symbol, and description is abbreviate|omitted.

[0058] In FIG. 7 , demodulation section 106 demodulates the control information input from control information extraction section 105 and outputs it to decoding section 107 and channel quality measurement section 121 . As described above, this control information is information transmitted from each mobile station using the uplink control channel of each mobile station. Therefore, channel quality measurement section 121 measures the received CIR of the control information input from demodulation section 106 as the channel quality of the uplink control channel for each mobile station, and outputs it to selection section 113 . Selecting section 113 selects packet data to output to distributing...

Embodiment approach 3

[0062] 8 is a block diagram showing the configuration of a mobile station device according to Embodiment 3 of the present invention.

[0063] In FIG. 8 , reception radio processing section 202 down-converts a received signal received by antenna 201 from a radio frequency to a baseband frequency, and outputs the received signal to GI removal section 203 .

[0064] GI removing section 203 removes GI from the reception signal input from reception radio processing section 202 and outputs it to FFT section 204 .

[0065] FFT section 204 converts the reception signal input from GI removing section 203 from serial data format to parallel data format, performs FFT processing, and outputs it to separating section 205 as a signal for each subcarrier.

[0066] The separation unit 205 separates the signal input from the FFT unit 204 into a data channel signal and a control channel signal, and outputs the data channel signal to the demodulation unit 206 and the data channel quality measure...

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Abstract

A scheduling method capable of suppressing, in a multicarrier transmission for which a data channel is scheduled, interferences with adjacent cells to suppress reduction of the line capacity, while preventing reduction of the throughput. This method selects a mobile station, to which the data channel is to be assigned, based on the line quality of the control channel for each of OFDM symbols in the time axis direction, while assigning, based on the line quality of the data channel, the data channel of each mobile station for each of the subcarriers in the frequency axis direction. That is, the method performs, based on the line quality of the control channel, the data channel scheduling in the time axis direction, while performing, based on the line quality of the data channel, the data channel scheduling in the frequency axis direction.

Description

technical field [0001] The present invention relates to a base station apparatus, a mobile station apparatus, and a data channel scheduling method, for example, to a base station apparatus and a data channel scheduling method for allocating data channels of each mobile station to a plurality of subcarriers by OFDM (Orthogonal Frequency Division Multiplexing). Background technique [0002] As a system satisfying the request for high-speed packet transmission, a super 3G system is being studied. As the Super 3G system currently being researched, there is a multi-carrier transmission system such as OFDM or MC-CDMA. In addition, in a multi-carrier transmission system, research is being conducted on frequency scheduling in which data channels are scheduled for each subcarrier. In frequency scheduling, frequency utilization efficiency is improved by allocating packet data for each mobile station to subcarriers with good channel quality. More specifically, frequency scheduling is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J11/00H04L5/02H04L27/26H04W16/02H04W28/00H04W72/04H04W72/08
CPCH04L27/2608H04L5/023H04L5/006H04L5/0064H04L5/0044H04L5/0073H04W72/0453H04J11/005
Inventor 西尾昭彦
Owner PANASONIC CORP
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