Title:
携帯電話環境における高速データ通信の方法及び装置
Document Type and Number:
Japanese Patent JP4130476
Kind Code:
B2
Abstract:
A method and apparatus for transmitting digital data in a cellular environment. Adjacent cells of the cellular system are prevented from simultaneously transmitting data. Because the noise from transmissions of adjacent cells is a primary source of interference, the transmission rate of power limited base stations can be dramatically increased when the noise from adjacent cells is eliminated. The transmissions to each subscriber station are made at a fixed transmission power level. However, the data rate of transmitted signals differs from one subscriber station to another depending the path loss differences. In a first exemplary embodiment, the data rate of transmissions to a subscriber station is determined by selecting an encoding rate for the transmitted signal while holding the symbol rate constant. In a second exemplary embodiment, the data rate of transmissions to a subscriber station is determined by selection a modulation format for the transmitted signal which directly changes the symbol rate of transmission to a subscriber station.
Inventors:
Zehavi, Ephraim
Application Number:
JP52074198A
Publication Date:
August 06, 2008
Filing Date:
October 27, 1997
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04B7/26; H04J13/00; H04L1/00; H04L29/08; H04W28/18; H04W28/22; H04W24/00; H04W72/04; H04W72/08; H04W84/04
Domestic Patent References:
| JP6507763A | ||||
| JP9512672A |
Foreign References:
| WO1995028814A1 |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Ryo Hashimoto
Toshio Shirane
Sadao Muramatsu
Ryo Hashimoto
Toshio Shirane