Title:
CDMA MOBILE COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP3904716
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To avoid spreading code shortage of an outgoing line while performing transmission power control of an incoming line even at the time of asynchronous communication only by the incoming line in a CDMA cellular system.
SOLUTION: At the time of asynchronous communication only by an incoming line, a frame constitution part 103 transmits only a pilot signal and a transmission power control bit as a signal constituted into a slot unit. A transmission power control method is performed similarly a normal communication. In this case, as a signal transmitted in an outgoing line is only the pilot signal and the transmission power control bit, a carrier rate is lowered, the transmission power is lowered by a transmission signal amplitude control part 106 and can be transmitted. Moreover, in that case, a spreading code used in a diffuser 105 is transmitted as a hierarchy orthogonal system of long code length.
Inventors:
Masatoshi Watanabe
Application Number:
JP7831698A
Publication Date:
April 11, 2007
Filing Date:
March 10, 1998
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04B7/26; H04B1/707; H04B7/005; H04J13/18; H04W28/22; H04W52/04; H04J11/00; (IPC1-7): H04B7/26; H04B1/707
Domestic Patent References:
| JP9312881A | ||||
| JP8256097A | ||||
| JP6014006A | ||||
| JP6276176A | ||||
| JP2000513537A |
Attorney, Agent or Firm:
Koichi Washida