Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1997-08-22
2000-05-09
Patel, Ajit
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370389, H04L 1228
Patent
active
060613548
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a system configuration for loading a standard ATM cell with connections in the form of multiple low rate micro-frames in accordance with predetermined format in ATM (asynchronous transfer mode) transmission.
The description of the present specification is based on that of the specification of Japanese patent application No. 7-337547 filed on Dec. 25, 1995, on which the present application claims convention priority, and the contents of the Japanese patent application are incorporated here by reference.
BACKGROUND ART
Methods for loading a standard ATM cell with multiplexed connections in the form of micro-frames including data shorter than the standard ATM cell are variously proposed, and one of them is disclosed, for example, in Japanese patent application No. 7-266039, "Short cell multiplexed ATM transmission system and transmission method", which was filed by the assignee of the present invention and now abandoned without publication by refiling as Japanese Patent Application No. 8-52169 on Mar. 8, 1996. The assignee of the. present application filed U.S. National Phase Application 08/966,862 of PCT Application PCT/JP96/02954, coaiming convention priority of the Japanese Patnet Application No. 8-52169. However, the inventors of the present invention do not know any concrete configuration designed for multiplexing the micro-frames, and for carrying out its control and fast processing thereof in a multiplex transmitter that performs multiplexing of the micro-frames.
The object of the present invention is to provide a concrete configuration of a high speed multiplexed transmitter for loading standard ATM cells with a plurality of connections in the form of micro-frames including data shorter than the standard ATM cell.
Another object of the present invention is to achieve effective multiplex transmission processing by incorporating two buffers, a buffer for deciding micro-frames to be multiplexed and a transmission queuing buffer, into a single queuing buffer.
Still another object of the present invention is to achieve quality management of micro-frame connections having multiple qualities concerning a tolerable multiplexing wait time or a micro-frame cancellation ratio, and to implement multiplex transmission processing at high efficiency.
DISCLOSURE OF THE INVENTION
In a first aspect of the present invention, there is provided a multiplex transmitter for performing multiplex transmission by loading a standard ATM cell with multiplexed connections composed of micro-frames each including data shorter than the standard ATM cell, the multiplex transmitter comprising: been distributed; queuing buffers when a predetermined extracting time comes, or when a number of the micro-frames in each of the multiplex queuing buffers reaches a predetermined number; standard ATM cell in accordance with a predetermined multiplexing scheme; in the transmission queuing buffer reaches a predetermined canceling time; queuing buffer; and
In a second aspect of the present invention, there is provided a multiplex transmitter for performing multiplex transmission by loading a standard ATM cell with multiplexed connections composed of micro-frames each including data shorter than the standard ATM cell, the multiplex transmitter comprising: been distributed; multiplex queuing buffers when a predetermined extracting time comes, or when a total length of the micro-frames in each of the multiplex queuing buffers reaches a data length; standard ATM cell in accordance with a predetermined multiplexing scheme, and notifies the extracting portion of the data length loadable onto a next ATM cell; in the transmission queuing buffer reaches a predetermined canceling time; queuing buffer; and
Here, the distributor may distribute the input micro-frames to the buffers having different multiplexing schemes in accordance with predetermined service conditions.
The multiplexing processor may determine extracting order from the buffers in accordance with the service conditions, may extract the mi
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Ishino Fumiaki
Kawakami Hiroshi
Morikawa Hiroki
Nakajima Akihisa
Saito Yukichi
NTT Mobile Communications Network Inc.
Patel Ajit
Pizarro Ricardo M.
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