Title:
BASE STATION DEVICE AND PACKET TRANSMISSION METHOD
Document Type and Number:
WIPO Patent Application WO/2003/069805
Kind Code:
A1
Abstract:
A despreading section (104) outputs a signal representing the number of paths for which despreading is conducted to a likelihood calculating section (108). An fD determining section (107) determines the Doppler frequency (fD) of the fading fluctuation of the propagation path between each communication terminal and the base station device from the despread signal. The likelihood calculating section (108) calculates the likelihood of the reported value transmitted from each communication terminal on the basis of the number of paths for which despreading is carried out and the Doppler frequency. A transmission destination determining section (151) determines a communication terminal to which a downlink high-speed packet is transmitted on the basis of the judgment value which is the product of the reported value by the likelihood. A modulation method determining section (152) determines the coding rate and modulation method of the downlink high-speed packet on the basis of the judgment value. By transmitting a downlink high-speed packet in consideration of the error included in the reported value, the number of retransmissions is reduced, the transmission efficiency is improved, and the system capacity is increased.
Inventors:
KANEMOTO HIDEKI (JP)
MIYA KAZUYUKI (JP)
MIYA KAZUYUKI (JP)
Application Number:
PCT/JP2003/001597
Publication Date:
August 21, 2003
Filing Date:
February 14, 2003
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
KANEMOTO HIDEKI (JP)
MIYA KAZUYUKI (JP)
KANEMOTO HIDEKI (JP)
MIYA KAZUYUKI (JP)
International Classes:
H04B1/707; H04B7/26; H04J13/00; H04L1/00; H04L1/18; H04W28/00; H04W28/18; H04W72/08; H04W88/08; H04W92/10; (IPC1-7): H04B7/26
Foreign References:
| JPH0955693A | 1997-02-25 |
Other References:
ARNAB DAS ET AL.: "Performance of hybrid ARQ for high speed downlink packet access in UMTS", IEEE VEHICULAR TECHNOLOGY CONFERENCE, vol. 4, 2001, pages 2133 - 2137, XP010562345
Attorney, Agent or Firm:
Washida, Kimihito (Shintoshicenter Bldg. 24-1, Tsurumaki 1-chom, Tama-shi Tokyo, JP)
Download PDF: