JPH04215344A - Information arranging system for cell - Google Patents

Abstract

PURPOSE:To synchronize and transmit plural pieces of simultaneous communication information by arranging plural pieces of information in which display for time adjustment is attached on one cell. CONSTITUTION:Plural communication areas 20, 30 are provided at the prescribed areas of a user information part 12 in one packetized cell 10, and also, an area of communication information effective display 21 for time adjustment between them is provided at the prescribed position of each area 20 other than the fundamental area 30, respectively.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for arranging information in cells, which are units of transmission packets, proposed for an asynchronous transmission method in broadband ISDN (Integrated Services Digital Network).

0002

[Prior Art] Conventionally, the information arrangement method of this type of cell is
Studies are being conducted mainly by CCITT and others to convert communication information into fixed-length packets called cells, and to realize statistical multiplexing on communication paths.

[0003] This cell is divided into a fixed-length header section and a user information section, and one piece of communication information is stored in the user information section and transmitted over a communication path.

0004

[Problems to be Solved by the Invention] The above-mentioned conventional cell information arrangement system is configured to accommodate only one piece of communication information in one cell, so it is difficult to combine voice and images, such as in a videophone, for example. It is not possible to communicate at the same time or in synchronization, and therefore, there is a delay time between the image and the audio, which causes discomfort to the communicator, such as making it difficult to see and hear.

An object of the present invention is to solve the above problems by accommodating and arranging a plurality of pieces of communication information in the user information section of one cell, and inserting the temporal positional relationship between these pieces of communication information as an indication of the validity of the communication information. The object of the present invention is to provide a cell user information arrangement method that solves the problem.

[0006]

[Means for Solving the Problems] The cell information arrangement method according to the present invention is a cell information arrangement method in units of transmission packets proposed in the asynchronous transmission method in broadband ISDN (Integrated Services Digital Network). However, a plurality of pieces of communication information to be transmitted simultaneously are fixedly arranged at predetermined positions in the user information area, and the temporal positional relationship of each of the other pieces of communication information to one of the largest pieces of communication information is determined in each information area. It is characterized by being inserted and arranged at a predetermined position as a communication information valid display.

[0007]

EXAMPLE Next, the present invention will be explained with reference to FIG. FIG. 1 is a cell format diagram showing an embodiment of the present invention.

As shown in the figure, the cell 10 has a header section 11.
and a user information section 12, and is a fixed-length packet.

[0009] The user information section 12 is further divided into a first area 20 and a second area 30, and these areas have predetermined lengths.

[0010] The first area 20 further has first communication information 22 having a first communication information validity indicator 21;
Area 30 has one piece of second communication information.

For example, in the case of a videophone, a small amount of audio information is placed in the first area 20, and a large amount of image information is placed in the second area 3.
0, respectively. When dividing information because audio information and image information form one cell 10, the first communication information valid display 21 displays the second communication information of a large amount of information in consideration of the general case where time synchronization cannot be achieved. 31 as basic information, and fine adjustment information for the time difference with this basic information is inserted.

Although the user information section is divided into two in this embodiment, it may be divided into three or more if the interfaces between terminals are combined. In this case, a communication information effective display area is provided in order to treat the largest amount of communication information as basic information and adjust the time difference for other communication information.

[0013]

As explained above, the present invention provides a plurality of communication information areas in the user information section of one cell, and sets an effective display area for mutual time difference adjustment to each communication area except for one basic area. By providing it in the information area, there is an effect that a plurality of simultaneous communication information can be transmitted in synchronization.

[Brief explanation of the drawing]

FIG. 1 is a format diagram showing an embodiment of a cell information arrangement method according to the present invention.

[Explanation of symbols]

10 Cell 11 Header section 12 User information department 20 1st area 21 Communication information valid display 22, 31 Communication information 30 Second area

Claims (1)

[Claims] Claim 1. In a cell information arrangement method in units of transmission packets proposed in an asynchronous transmission method in wideband ISDN (Integrated Services Digital Network), the cell comprises:
A plurality of pieces of communication information to be transmitted at the same time are fixedly arranged at predetermined positions in the user information area, and the temporal positional relationship of each of the other pieces of communication information with respect to one of the pieces of communication information (basic information) is determined in each information area. A cell information arrangement method characterized by inserting and arranging cell information at a predetermined position as a valid display of communication information.