The critical radius in CDMA ad hoc networks

In ad hoc networks, it is necessary to suppress transmissions by nodes around the desired receiver in order to achieve successful communication. This minimum separation, the critical radius, has important implications on carrier sensing and other MAC-level protocols. Previously, the critical radius has not been well understood. The critical radius is investigated in CDMA ad hoc networks, with non-spread spectrum ad hoc networks being a special case where the spreading gain is unity. It is shown that the size of this exclusion zone has a large impact on the transmission capacity of ad hoc networks, and an optimal critical radius is found using stochastic geometry.

[1]  D. Stoyan,et al.  Stochastic Geometry and Its Applications , 1989 .

[2]  Paul Muhlethaler,et al.  A Spatial Reuse Aloha MAC Protocol for Multihop Wireless Mobile Networks , 2003 .

[3]  Andrea J. Goldsmith,et al.  Capacity regions for wireless ad hoc networks , 2003, IEEE Trans. Wirel. Commun..

[4]  Michael B. Pursley,et al.  Error Probabilities for Spread-Spectrum Packet Radio with Convolutional Codes and Viterbi Decoding , 1985 .

[5]  Branimir R. Vojcic,et al.  Ad hoc, multihop CDMA networks with route diversity in a Rayleigh fading channel , 2001, 2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277).

[6]  Panganamala Ramana Kumar,et al.  RHEINISCH-WESTFÄLISCHE TECHNISCHE HOCHSCHULE AACHEN , 2001 .

[7]  Jeffrey G. Andrews,et al.  Transmission capacity of CDMA ad hoc networks employing successive interference cancellation , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[8]  Xiangying Yang,et al.  Transmission capacity of CDMA ad-hoc networks , 2004, Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738).

[9]  Andrew J. Viterbi,et al.  On the capacity of a cellular CDMA system , 1991 .

[10]  John A. Silvester,et al.  Optimum Transmission Ranges in a Direct-Sequence Spread-Spectrum Multihop Packet Radio Network , 1990, IEEE J. Sel. Areas Commun..

[11]  M.B. Pursley.  The role of spread spectrum in packet radio networks , 1987, Proceedings of the IEEE.

[12]  Tamer A. ElBatt,et al.  Joint scheduling and power control for wireless ad hoc networks , 2002, IEEE Transactions on Wireless Communications.