AAL2分組話音復(fù)接器的研究與實(shí)現(xiàn)
Study and implementation of AAL2 packet voice multiplexer
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摘要: 該文研究在ATM虛通路帶寬利用率一定的條件下,AAL2分組話音復(fù)接器性能隨ATM虛通路輸出速率的增加而變化的情況。得出結(jié)論:當(dāng)ATM虛通路帶寬利用率一定時(shí),ATM虛通路輸出速率越高,AAL2分組話音復(fù)接器的分組丟棄概率和平均分組排隊(duì)時(shí)延越小。并提出了一種AAL2分組話音復(fù)接器的實(shí)現(xiàn)方案。該方案可以隨著ATM虛通路輸出速率的增加,方便地復(fù)接多個(gè)E1話音電路上的話音數(shù)據(jù)。
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關(guān)鍵詞:
- ATM; AAL2; 分組話音; 服務(wù)質(zhì)量
Abstract: This paper investigates the performance of the AAL2 packet voice multiplexer as a function of the transmission capacity of the ATM VC when the ATM VC bandwidth utilization is constant. A conclusion is drawn that packet delay and probability of packet loss will decrease when the transmission capacity of the ATM VC increases. Finally, an implementation of AAL2 packet voice multiplexer is presented which can easily multiplex the voice calls from multiple El voice circuit. -
K. Sriram, T. G. Lyons, Y. -T. Wang, Anomalies due to delay and loss in AAL2 packet voice systems: performance models and methods of mitigation, IEEE J. on SAC., 1999, 17(1), 4-17.[2]K. Sriram, Y. -T. Wang, Voice over ATM using AAL2 and bit dropping: performance and call admission control, IEEE J. on SAC., 1999, 17(1), 18-28.[3]K. Sriram, D. M. Lucantoni, Traffic smoothing effects of bit dropping in a packet voice multiplexer,IEEE Trans. on Comm., 1989, COM-37(7), 703-712.[4]K. Sriram, W. Whitt, Characterizing superposition arrival processes in packet multiplexers for voice and data, IEEE J. on SAC., 1986, 4(6), 833-846.[5]Mischa Schwartz, Broadband Integrated Networks, Prentice Hall PTR, 1998, 26-32.[6]af-vtoa-0113.000, ATM Trunking Using AAL2 for Narrowband Services, Feb 1999.af-vtoa-0120.000, Implementation Conformance Statement (ICS) Proforma for ATM Trunking Using AAL2 for Narrowband Services, May 1999. ［8］ITU-T Recommendation I.362.2, B-ISDN ATM Adaptation Layer Type 2 Specification, Feb 1997. -
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