The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Variable Priority MAC Protocol for QoS Guarantee in Wireless ad hoc Networks

무선 ad hoc 망에서 QoS 보장을 위한 가변 우선순위 MAC 프로토콜

  • Published : 2007.07.31
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Abstract

Because of MANET's dynamic characteristic, the hidden node problem can happen. Thus it must use with distributed channel access. In Ad hoc networks, carrier sense multiple access with collision avoidance(CSMA/CA) is one of the most widely used medium access control(MAC) schemes for asynchronous data traffics. However, CSMA/CA could not guarantee the quality of multimedia traffics. CSMA is a contention based protocol. Therefor once a node gets a channel, it can momopolze. Thus the fairness problem with channel starvation will happen. We will propose a new MAC protocol to guarantee QoS for multimedia data in ad hoc networks.

Ad hoc 무선망의 동적인 특성으로 인하여 히든노드 문제가 나타날 수 있기 때문에 ad hoc 무선망에서는 분산방식으로 네트워크가 동작되어야 한다. Ad hoc 무선망에서 CSMA/CA는 비동기적 데이터 트래픽을 위해 가장 많이 사용되는 MAC Protocol 중의 하나이다. 그러나 CSMA/CA는 멀티미디어 데이터의 특성을 보장하지 못한다. 또한 경쟁형(Contention)이므로 채널을 먼저 잡은 하나의 스테이션이 채널을 독점해서 사용하여 채널 기아(starvation)로 인한 공평성문제(fairness problem)가 발생한다. 본 논문에서는 무선 ad hoc망에서 멀티미디어 데이터의 특성을 고려하여, QoS 보장을 위한 MAC protocol을 제안한다.

Keywords

References

  1. C.K Toh, Ad Hoc Mobile Wireless Networks, pp. 39-56
  2. P. Jarn, 'MACA-A new channel access method for packet radio,' In Proc. ARRL/CRRL Amateur Radio Ninth Computer Networking Conf., ARRL, pp. 134-140, 1990
  3. Sobrinho, J.L.; Krishnakumar, A.S. 'Quality-of-service in ad hoc carrier sense multiple access wireless networks,' IEEE Journal vol. 17, No. 8, pp. 1353-1368, Aug. 1999
  4. C. Fullmer and J. Garcia-Luna-Aceves, 'Floor acquisition multiple acess (FAMA) for packet-radio networks,' In Proc. SIGCOMM'95, Cambridge, MA, pp. 262-273
  5. Talucci, F.; Gerla, M. MACA-BI (MACA by invitation). 'A wireless MAC protocol for high speed ad hoc networking'., IEEE Inter. Confer., vol. 2, No. 6, pp. 913 -917, 1997
  6. IEEE standard for information technologytelecommunications and information exchange between systems- local and metropolitan area networks- specific requirements part 11: wireless lan medium access control (MAC) and physical layer(PHY) specifications IEEE Std 802.11b-1999/Cor 1-2001, pp. 0_1 -15, 2001
  7. C. Fullmer and J. Garcia-Luna-Aceves, 'Floor acquisition multiple acess(FAMA) for packet-radio networks'., In Proc. SIGCOMM'95, Cambridge, MA, pp. 262-273
  8. Marias, G.F.; Merakos, L. 'Performance estimation of a decentralized mutlicarrier access framework in unlicensed wireless systems Communications,' . IEEE ICC, vol 9, pp. 2840-2844, 2001
  9. Gang Qiang; Zengji Liu; Susumu Ishihara; Tadanori Mizuno 'CDMA-based carrier sense multiple access protocol for wireless LAN,' IEEE VTS 53rd 2001, vol.2, pp. 1164-1168, Spring 2001
  10. Marias, G.F.; Merakos, L. 'Performance stimation of a decentralized mutlicarrier access framework in unlicensed wireless systems' IEEE ICC 2001. vol.9 pp. 2840-2844, 2001