Title:
【発明の名称】TDMコミュニケーション・システムのマルチアドレス・コントロール
Document Type and Number:
Japanese Patent JP2857192
Kind Code:
B2
Abstract:
A message communication system employing one or more centralized communication stations transmitting messages through Earth orbit relay satellites to mobile receivers utilizing Time Division Multiplexed (TDM) communication signals having signal time frames divided into a series of transmission channels. A predetermined number of the channels are designated as address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by receivers to determine both the presence of a message and its corresponding data transmission channel. Each system receiver scans, and tracks only the communication signal address channels until a message addressed to that receiver is detected, at which time the selected receiver changes channels to the designated data channel for reception of the message. Thus, demodulation of the entire communication signal is not required and processing time and power is reduced for the typical waiting condition when messages are not being received. While a message is being received only a portion of the communication signal need to be received, demodulated and decoded. The decoded message is then displayed on a display screen or similar device for the recipient.
Inventors:
JIRUHAUSEN KUREIN ESU
ANTONIO FURANKURIN PII
JAKOBUSU AAUIN EMU
ANTONIO FURANKURIN PII
JAKOBUSU AAUIN EMU
Application Number:
JP50304489A
Publication Date:
February 10, 1999
Filing Date:
December 21, 1988
Export Citation:
Assignee:
KUARUKOMU INC
International Classes:
H04B7/212; H04J3/00; H04J3/16; H04J3/24; H04W52/02; H04W72/04; H04W84/02; (IPC1-7): H04Q7/18
Domestic Patent References:
| JP1170129A |
Attorney, Agent or Firm:
Takehiko Suzue (2 outside)