DocumentCode :
2950725
Title :
Bi-directional 3-port ATM CAM supporting fast look-up and reduced cycle time
Author :
Park, Yeong-Ho
Author_Institution :
Dept. of Broadband Commun., ETRI, Taejon, South Korea
fYear :
1996
fDate :
21-24 Oct 1996
Firstpage :
159
Lastpage :
162
Abstract :
This paper presents an architecture of a bi-directional 3-port ATM CAM. It satisfies one of the fundamental requirements that ATM cell header translation has to be performed in real time. It also reduces the access cycle time to get a retrieval header and reduces the header converted as a result of the match processing. The proposed architecture is composed of three access ports. Each port operates independently of each other. To realize this 3-port function, a bit architecture based on the presented requirements of the functional ATM CAM is proposed. Using such a bit architecture, an architecture of CAM part which includes each module for GFC, VPI, VCI, and PTI field, is also proposed. To provide bi-directional translation of VPI/VCI, two CAM architectures for receiving and transmitting directions are used in each block respectively. The two CAMs reciprocate their matching addresses and the data corresponding to the addresses. It provides control cell extraction such as OAM, unassigned, and physical layer cells. It optionally provides 3-byte tagging for cell switching function for both UNI and NNI modes
Keywords :
B-ISDN; CMOS memory circuits; asynchronous transfer mode; content-addressable storage; protocols; telecommunication traffic; CMOS technology; access cycle time; access ports; bidirectional three-port ATM CAM; bidirectional translation; bit architecture; cell header translation; cell switching function; control cell extraction; matching addresses; retrieval header; tagging; Asynchronous transfer mode; Bidirectional control; CADCAM; Computer aided manufacturing; Information retrieval; Protocols; Random access memory; Read-write memory; Routing; Switches;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
ASIC, 1996., 2nd International Conference on
Conference_Location :
Shanghai
Print_ISBN :
7-5439-0940-5
Type :
conf
DOI :
10.1109/ICASIC.1996.562776
Filename :
562776
Link To Document :
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