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 Title: |
US4429383:
Method for seizing time slots of a time-division multiplex system with dynamic multiplexers
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Finck, Herbert; Wolfratshausen, Germany
Reisinger, Konrad; Zorneding, Germany
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| Assignee: |
Siemens Aktiengesellschaft, Berlin & Munich, Germany
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| Published / Filed: |
1984-01-31
/ 1981-01-16
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| Application Number: |
US1981000225736
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| IPC Code: |
Advanced:
H04J 3/16;
H04J 3/24;
H04L 1/00;
Core:
more...
IPC-7:
H04J 3/16;
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| U.S. Class: |
Current:
370/433;
370/358;
370/459;
370/538;
Original:
370/084;
370/080;
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| Field of Search: |
370/080,84,93,112
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| Priority Number: |
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| Abstract: |
In a time-division multiplexing system, data are supplied to the multiplexer with different speeds. Depending on the speed, time slot groups are allocated to the data, with the number of allocated time slots increasing with the speed. The search for groups of free time slots occurs in a fixed sequence. Data to which time slot groups at the end of the fixed sequence have been allocated, are relocated to time slot groups which have become free nearer the beginning of the sequence. The allocated time slot group for the forward transmission direction is signalled to the multiplexer of the remote station which in turn occasions a corresponding allocation of time slots for the reverse transmission direction for data originating at the remote station.
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| Attorney, Agent or Firm: |
Hill, Van Santen, Steadman & Simpson ;
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| Primary / Asst. Examiners: |
Brigance, Gerald L.;
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Designated Country: |
AT BE CH GB IT LI NL SE AT BE CH GB IT NL SE
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| Family: |
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First Claim:
Show all 10 claims |
What is claimed is:
1. A method for seizing time slots in a time-division multiplex system with dynamic multiplexers which allows transmission of data channels between two stations in both directions, wherein the time slot number 0 through (-1+2m .multidot.n) can be allocated in sequence to 2m time slots of the time-division multiplex frame, and wherein groups of the order i of 2i time slots per time-division multiplex frame can be seized with data in different channels having differing bit rates, and the time slot numbers of said groups differ by multiples of n, where m and n are positive whole numbers and i is equal to 0 or equal to a positive, whole number, comprising the steps of:
- a. before the seizure of time slots, the order i of the required group of time slots is determined as a function of the existing bit rate of the data to be transmitted;
- b. for identifying free time slots, the time slot groups of the order i within a first time slot group of the order m are checked in a fixed sequence (R) until a free time slot group of the order i is found;
- c. when no free time slot group of the order i has been found in the search for free time slot groups within the order m, the search is carried out within further time slot groups of the order m;
- d. an address is allocated to each time slot of a free group of time slots which has been found and said allocation is signalled to the multiplexer of the remote station which in turn occasions the corresponding allocation;
- e. independently of the identification of a group of free time slots, seized groups of time slots are sought in reversed sequence to the fixed sequence (R);
- f. as soon as a seized group of time slots is found, in the fixed sequence (R), a new group of free time slots of the same order as the seized group is sought which, relative to the fixed sequence (R), must lie in front of the seized group found;
- g. when the new groups of free time slots has been found, the address allocated to the seized group is allocated to said free group of time slots and this allocation is signalled to the multiplexer of the remote station which in turn occasions the same allocation;
- h. as soon as the new group of time slots is seized, the previously seized group of time slots is released.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 9 U.S. patent(s) that reference this one
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