IEEE 802.15.4 and IEEE 802.11b/g work in the same 2.4GHz industrial scientific and medical band, their coexistence is crucial to ensure both of them work efficiently under the interference of each other. In this paper we investigated the above issue through extensive measurements in a systematic way. The experimental results show that (1) the performance of IEEE 802.11b/g also suffers from the ...

1 IEEEAC paper #1107, Updated October 15, 2002. 0-7803-7651-X/03/$17.00 © 2003 IEEE Abstract— In the realm of building construction and computer hardware, the word “architecture” means a set of features shared by a class of designs, or equivalently, a set of constraints on a class of designs (e.g. gothic architecture or RISC architecture). But in the realm of software, the meaning of “architect...

Collision avoidance is critical for the performance of contentionbased medium access mechanism such as CSMA. In this paper, the IEEE 802.11-based MAC protocol is enhanced for performance improvements in multi-hop ad-hoc wireless networks. The protocol behavior of hidden terminals in carrier sensing range[10] is important for end-to-end performance. There are several mechanisms defined in IEEE 8...

To preventively detect hidden terminals in a node’s vicinity, two detection mechanisms, referred to as passive detection and active detection, are proposed and compared in this poster. Simulations based on IEEE 802.11-based ad hoc networks are carried out to evaluate the proposed schemes.

ness, eternality, and immutability. Moreover, in so far as the qualities of the whole are true also of the parts of that whole, these characteristics are inherent i n the newly synthesized .Idea. A. man who becomes a political figure ideally would possess the qualities of knowledge, maturity, decisiveness, honesty, tact, far-sightedness, 1 . Ritter, EPP, 165. 59

[11 H. E. Harris and D. R. McCoy, "Simplif erators," Electronic Design, vol. 5, pp. 34[2] P. Malagari, "Four step design of diode f vol. 11, pp. 58-63, 2 August 1963. [3] J. F. Gibbons and H. S. Horn, "A circui over 9 decades," IEEE Trans. Circuit Th ber 1964. [4] J. Sheehy, 'Device provides dc linear Design, vol. 12, pp. 50-51, 6 July 1964. [5] M. Sapoff and R. M. Oppenheim, "Desig IEEE Conv. ...

In this report, we first describe the problem that we are dealing with i.e. data dissemination in multi-hop cognitive radio networks. To address this problem, we propose a channel selection strategy named ‘SURF’. We evaluate the proposed channel selection strategy in both single-hop and multi-hop scenarios and compared it with relevant approaches. So far, one technical report and a poster is pu...