Title :
Performance evaluation of multiplexing AAL2 voice traffic and TCP/IP data at the ATM cell level
Author :
Okutani, Takenori ; Watanabe, Hideki ; Nisase, Takemi
Author_Institution :
NTT Inf. Sharing Platform Labs., Musashino, Japan
Abstract :
ATM adaptation layer type 2 (AAL2) has been standardized to carry highly compressed voice traffic with silence suppression over an ATM network. The ITU-T recommends using the constant bit rate (CBR) for ATM service carried through an AAL2 virtual channel (VC) to guarantee voice quality. However, the traffic characteristic of AAL2 VC is variable bit rate (VBR), which is different from that of the TCP/IP data traffic at the ATM cell level by two multiplexing techniques: priority multiplexing and non-priority multiplexing. Priority multiplexing enables the transfer to TCP/IP data with the AAL2 voice quality guaranteed. Non-priority multiplexing can enable the application of VBR services through AAL2 under certain conditions, and can thus help optimize transmission efficiency in the ATM backbone network
Keywords :
asynchronous transfer mode; data communication; multiplexing; optimisation; standardisation; telecommunication standards; telecommunication traffic; transport protocols; voice communication; AAL2 virtual channel; AAL2 voice traffic; ATM adaptation layer type 2; ATM backbone network; ATM cell level; ATM service; CBR; ITU-T; TCP/IP data; VBR services; constant bit rate; highly compressed voice traffic; multiplexing; non-priority multiplexing; performance evaluation; priority multiplexing; silence suppression; transmission efficiency optimization; variable bit rate; voice quality; Asynchronous transfer mode; Bandwidth; Bit rate; Speech coding; Switches; TCPIP; Telecommunication traffic; Throughput; Traffic control; Virtual colonoscopy;
Conference_Titel :
ATM Workshop, 1999. IEEE Proceedings
Conference_Location :
Kochi
Print_ISBN :
4-88552-164-5
DOI :
10.1109/ATM.1999.786887
