Title:
DOWNSTREAM PACKET COMMUNICATION TRANSMISSION CONTROL METHOD AND RADIO BASE STATION
Document Type and Number:
WIPO Patent Application WO/2006/092976
Kind Code:
A1
Abstract:
To prevent communication problems of HSDPA caused by transmission power margins. A radio base station, which uses a downstream common channel to transmit data packets to a plurality of mobile stations, uses two larger and smaller transmission power margins to determine two assigned powers of the downstream common channel. The radio base station executes a step of associating, with a mobile station, a first transmission format, in which a phase modulation or a phase/amplitude modulation is applied to the data packets to be transmitted by use of the assigned power corresponding to the larger margin; also executes a step of associating, with the mobile station, a second transmission format, in which only a phase modulation is applied to the data packets to be transmitted by use of the assigned power corresponding to the other margin; then compares the total numbers of bits transmitted by use of the transmission formats; and transmits the data packets by use of the transmission format corresponding to the larger value.
Inventors:
ISHII NAOTO (JP)
Application Number:
PCT/JP2006/302998
Publication Date:
September 08, 2006
Filing Date:
February 21, 2006
Export Citation:
Assignee:
NEC CORP (JP)
ISHII NAOTO (JP)
ISHII NAOTO (JP)
International Classes:
H04B1/707; H04B7/26; H04J13/00; H04W28/00; H04W28/04; H04W28/22; H04W52/28; H04W52/34; H04W52/36; H04W72/12; H04W52/26
Foreign References:
| JP2004064711A | 2004-02-26 | |||
| JP2004173019A | 2004-06-17 | |||
| JP2004128993A | 2004-04-22 |
Attorney, Agent or Firm:
Yamashita, Johei (Toranomon 40th MT Bldg. 13-1, Toranomon
5-chome, Minato-k, Tokyo 01, JP)
Download PDF:
Previous Patent: PROCESSING STAGE, FOCUSED BEAM PROCESSING APPARATUS, AND FOCUSED BEAM PROCESSING METHOD
Next Patent: DISPLAY AND DISPLAYING METHOD
Next Patent: DISPLAY AND DISPLAYING METHOD