Title:
【発明の名称】データ通信方法及び装置
Document Type and Number:
Japanese Patent JPH11510969
Kind Code:
A
Abstract:
An interface (4;12) between a data terminal (2;18) and a digital communications link (6,8,10) implements protocols and frame formats designed to reduce delays in a data communication with a remote terminal (18;2). The interface (4;12) overcomes the need to send or receive an HDLC SABME or UA control signal, and allows data to be sent over the digital communications link (6,8,10) as soon as the communication parameters are established. In a non-ARQ (error correction) mode, the interface (4;12) sends control signals and data over the communications link (6,8,10) in frames subdivided into many small subframes of fixed length, each subframe having a length code. The interface (12), when arranged for connection to the data terminal (18) through a telephone network (14), encodes call progress signals from the telephone network (14) for sending over the digital communications link (6,8,10). The interface (4;12) encodes and decodes interrupt signals for sending between the data terminal (2;18) and the digital communications link (6,8,10) when an interrupt signal is detected.
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Inventors:
Feldman, Howard, Ray
Kawai Nobuyuki
Smith, richard, douglas, lane
Limael, Francois-Arno
Kawai Nobuyuki
Smith, richard, douglas, lane
Limael, Francois-Arno
Application Number:
JP52908396A
Publication Date:
September 21, 1999
Filing Date:
March 29, 1996
Export Citation:
Assignee:
International Mobile Satellite Organization
International Classes:
H04L29/08; H04B7/15; H04B7/185; H04L12/54; H04L12/861; H04L29/06; H04M11/00; H04M11/06; H04L1/18; (IPC1-7): H04L29/08; H04B7/15; H04M11/00
Attorney, Agent or Firm:
Yoshiki Hasegawa (5 others)