Claims
- 1. A method of controlling the flow of cells in an asynchronous time-division communication system by forming cells received from an in-coming asynchronous time-division multiplex system (XE) into cells delivered to an out-going asynchronous time-division multiplex system (XS), said method comprising the steps of:
- storing each received in-coming cell in a buffer memory (MT) and at an address (Add) that corresponds to a real time (t) for re-sending the stored cell over an out-going time-division multiplex system (XS);
- comparing a first number of cells (N) of a particular communication with are already stored in said buffer memory (MT) and that have not been re-sent at the time when the next cells relating to the particular communication arrive with a maximal number (NM) which is assigned to the particular communication; and
- denying a re-sending of said next in-coming cell if the comparison finds that the first number exceeds the maximal number.
- 2. The method according to claim 1 further comprising:
- a status memory (MCO) and an arithmetic and logic unit (UAL), the status memory (MCO) being divided into a plurality of zones, each zone bi-univocally corresponding to a communication received over in-coming asynchronous time-division multiplex (XE) and comprising two sections (N and NM);
- the further steps comprising:
- storing in a first section (N) a number indicating the number of cells of the communication that are stored in the buffer memory (MT) and that have not yet been seen at the time of arrival of the next in-coming cell of the same communication;
- a storing in second section (NM) said maximal number assigned to the communication;
- using the arithmetic and logic unit (UAL) for making the comparison between the first number (N) and the second number (NM); and
- inhibiting the re-sending of the in-coming cell, when the first number (N) exceeds the second number (NM).
Parent Case Info
This application is a divisional application of Ser. No. 07/627,044, filed Dec. 13, 1990.
US Referenced Citations (3)
Foreign Referenced Citations (4)
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0293315 |
Nov 1988 |
EPX |
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Aug 1989 |
EPX |
0355243 |
Feb 1990 |
EPX |
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Non-Patent Literature Citations (2)
Entry |
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Divisions (1)
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Number |
Date |
Country |
Parent |
627044 |
Dec 1990 |
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