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 Title: |
EP0514462B1:
MULTIPLE BUFFER TIME DIVISION MULTIPLEXING RING[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
B1 PATENT SPECIFICATION i
(See also:
EP0514462A1,
EP0514462A4 )
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| Inventor: |
FREDRICSSON, Staffan, Anders;
CHOULDJIAN, Simon Sarkis;
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| Assignee: |
LUXCOM, INC.
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| Published / Filed: |
1998-12-02
/ 1991-01-30
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| Application Number: |
EP1991000904404
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| IPC Code: |
Advanced:
H04L 12/43;
Core:
H04L 12/427;
IPC-7:
H04L 12/64;
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| Priority Number: |
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| Attorney, Agent or Firm: |
Bowles, Sharon Margaret et al ;
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| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
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| Designated Country: |
AT BE DE DK FR GB GR IT LU NL SE
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| Family: |
Show 14 known family members
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First Claim:
Show all claims |
1. A master node (10;110;210;310) for controlling the flow of information on a time-division multiplexing ring (16) having a plurality of slave nodes (Slave Nodes 1-M) connected thereto, each slave node for enabling data transfer between the ring and one or more ring users, the ring having a plurality of time-slots (T1,T2,...TN) wherein each time-slot is enabled to contain a packet of data, and wherein one or more of the time-slots are allocated to each ring user for data transfer, said master node comprising:
- a first buffer means (20b,120b) having an input port, an output port and storage means for storing time-slots in a first-in-first-out arrangement, said input port coupling time-slots into said storage means and said output port coupling time-slots out of said storage means, said storage means having a capacity for storing at least one time-slot, said first buffer means shifting time-slots contained therein through said first buffer means when said input port of said first buffer means receives a next time-slot;
characterized by each time-slot having a delay-status designation of delay sensitive when said time-slot is conveying information for one or more delay-sensitive ring users and a delay-status designation of non-delay sensitive when said time-slot is conveying information for one or more non-delay-sensitive ring users;
- a second buffer means (20a,120a) having an input port, an output port and storage means for storing said time-slots in a first-in-first-out arrangement, said input port of said second buffer means coupling said time-slots into said storage means of said second buffer means and said output port of said second buffer means coupling said time-slots out of said storage means of said second buffer means, said storage means of said second buffer means (20a,120a) having a capacity for storing a predetermined number of time-slots greater than said storage means capacity of said first buffer means (20b,120b), said second buffer means shifting time-slots contained therein through said second buffer means when said input port of said second buffer means receives a next time-slot;
- an input means (12;112;112,270a-c) for coupling said time-slots from the ring into said input ports of said first buffer means and said second buffer means; and
- an output-switch means (18,19;118,119;218,119;318,119) for coupling out to the ring a time-slot output from said output port of said first buffer means (20b,120b) when a time-slot from said first buffer means (20b,120b) is to be transmitted onto the ring and for coupling out to the ring a time-slot output from said output port of said second buffer means (20a,120a) when a time-slot from said second buffer means (20a,120a) is to be transmitted onto the ring, including means for allocating on the ring the delay-sensitive time-slots such that when a delay-sensitive time-slot appears on said output port of said first buffer means (20b,120b) it is coupled by said output-switch means to the ring without loss of non-delay-sensitive time-slot information stored in said second buffer means (20a,120a), each said delay-sensitive time-slot being advanced thereby on the ring to a predetermined next delay-sensitive time-slot past a plurality of time-slots being stored in said second buffer means (20a,120a).
[German]
[French]
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Description
Expand description |
+ FIELD OF THE INVENTION
The present invention relates to time-division-multiplexing (TDM) and more particularly to a communication system utilizing a time-division-multiplexing (TDM) ring or loop for linking a plurality of users, e.g. computers, computer programs, computer peripheral devices, Local-Area-Networking (LAN) equipment and Wide-Area-Networking (WAN) equipment.
+ BACKGROUND OF THE INVENTION
+ Summary of the Invention
+ Brief Description of the Drawings
+ Detailed Description of the Invention
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| Other Abstract Info: |
DERABS G91-267387
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