Title :
FPGA implementation of an ATM traffic classifier for quality of service management
Author :
Holgado, S. ; Lopez-Buedo, S. ; Pearmain, A.J.
Author_Institution :
Dept. of Electron. Eng., Queen Mary & Westfield Coll., London, UK
Abstract :
One of the main problems in modern broadband networks is the variation of quality of service (QoS) that can occur. A very common technology used for broadband networks is ATM (asynchronous transfer mode). ATM can offer QoS guarantees for a number of different traffic classes. In an ATM switch it is possible to discard low-priority cells when the buffer is full. This can be done using logic implemented on a FPGA (field programmable gate array) chip, used because of its flexibility and easy re-configuration. This paper presents the FPGA implementation of an ATM cell priority classifier, which can be used in QoS management. The circuit directly receives a 155 Mbps ATM serial stream from a physical medium device, and performs cell delineation, serial to parallel conversion and classification according to the cell loss priority (CLP) bit. It has been implemented on a Xilinx Virtex XCV50PQ240-6 FPGA occupying 8252 equivalent gates. Simulation results show that the circuit can directly process a 155 Mbps ATM stream
Keywords :
asynchronous transfer mode; broadband networks; field programmable gate arrays; packet switching; quality of service; telecommunication network management; telecommunication traffic; 155 Mbit/s; ATM cell priority classifier; ATM serial stream; ATM switch; ATM traffic classifier; FPGA chip; FPGA implementation; QoS guarantees; QoS management; Xilinx Virtex FPGA; asynchronous transfer mode; broadband networks; buffer; cell delineation; cell loss priority; field programmable gate array; low-priority cells; physical medium device; quality of service management; simulation results; traffic classes; Asynchronous transfer mode; Broadband communication; Circuits; Delay; Field programmable gate arrays; Programmable logic arrays; Quality management; Quality of service; Switches; Telecommunication traffic;
Conference_Titel :
Electrotechnical Conference, 2000. MELECON 2000. 10th Mediterranean
Conference_Location :
Lemesos
Print_ISBN :
0-7803-6290-X
DOI :
10.1109/MELCON.2000.880404
