蓝牙与802.11b干扰问题的解决

接近为零。我们来看一下此机制对于提高wlan的网络吞吐量的影响，如图6所示，从图中看出使用此机制比不使用此机制wlan的网络通过率约提高了30%。此机制对网络时延的影响如图7，从图中可看出使用此机制并没有使时延明显增大。

图3 无线局域网丢包率

图4 蓝牙主单元丢包率

图5 蓝牙从单元丢包率

图6 无线局域网吞吐量

图7 蓝牙网络时延

4、结语

总体来说，该机制在减小丢包率和提高网络吞吐量方面非常有效，此机制并没有使网络时延明显增大，另外还有一个好处就是当信道不良时不发送信号能够节省发射功率。最重要的就是我们消除了蓝牙和802.11b之间的干扰。该机制的不足之处是针对ACL链路，对于SCO链路还需要进一步的研究。

参考文献

[1]GanH,andTreisterB. Adaptive Frequency Hopping Implementation Proposals forIEEE 802.15.1/2 WPAN [EB/OL]. http://www.ieee802.org/15/pub/TG2-Coexistence-Mechanisms.html, 2000-11.

[2]TreisterB,GanHB, Chen K.C.,Chen H.K.,Batra A.,and Eliezer O.Components of the AFH Mechanism [EB/OL].http//www,ieee802, org/15/pub/TG2-Coexistence-Mechanisms.html, 2001-5.

[3]CarlaF,Chiasseriniand Ramesh R.Rao.Coexistence Mechanisms for Interference Mitigation between IEEE 802.11 WLANsand Bluetooth [A]. INFOCOM 2002 [C].Twenty-First Annual Joint Conference of the IEEE Computer and CommunicationsSocieties, Proceedings. IEEE, 2002:590-598.

[4]KaliaM.BansalD. Shorey R. Vehicular Data scheduling and SAR for Bluetooth MAC [A]VTC 2000[C]-Spring Tokyo. 2000 IEEE 51st.

[5]JesungKim,YujinLim, Yongsuk Kim, and Joong Soo Ma. An adaptive segmentation scheme for the Bluetooth-hased wireless channel[A].Proceedings.Tenth International Conference on Computer Communications and Networks[C].2001:440-445.

[6]CarlosdeM,Cordeiro and Dharma P. Agrawal.Employing Dynamic Segmentation for Effective Colocated Coexistence between Bluetooth and IEEE 802.11 WLANs [A].Global Telecommunications Conference [C]. GLOBECOM '02 IEEE,2002:195-200.

[7]N.Golmie,RebalaO, Chevrollier N.Bluetooth Adaptive Frequency Hopping and Scheduling [A].Proc MILCOM '03[C],Boston, MA, Oct.2003.