TY - JOUR
T1 - Asymptotic analysis of multistage cooperative broadcast in wireless networks
AU - Sirkeci-Mergen, Birsen
AU - Scaglione, Anna
AU - Mergen, Gökhan
N1 - Funding Information:
Manuscript received March 15, 2005; revised December 15, 2005. This work was supported by the National Science Foundation under Grant ITR CCR – 0428427. The material in this paper was presented in part at the 2004 IEEE Workshop on Signal Processing Advances in Wireless Communications, Lisbon, Portugal, July 2004, the 2004 International Conference on Acoustics, Speech, and Signal Processing, Montreal, QC, Canada, May 2004, and the 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, Philadelphia, PA, May 2005.
PY - 2006/6
Y1 - 2006/6
N2 - Cooperative broadcast aims to deliver a source message to a locally connected network by means of collaborating nodes. In traditional architectures, node cooperation has been at the network layer. Recently, physical layer cooperative schemes have been shown to offer several advantages over the network layer approaches. This form of cooperation employs distributed transmission resources at the physical layer as a single radio with spatial diversity. In decentralized cooperation schemes, collaborating nodes make transmission decisions based on the quality of the received signal, which is the only parameter available locally. In this case, critical parameters that influence the broadcast performance include the source/relay transmission powers and the decoding threshold (the minimum signal-to-noise ratio (SNR) required to decode a transmission). We study the effect of these parameters on the number of nodes reached by cooperative broadcast. In particular, we show that there exists a phase transition in the network behavior: if the decoding threshold is below a critical value, the message is delivered to the whole network. Otherwise, only a fraction of the nodes is reached, which is proportional to the source transmit power. Our approach is based on the idea of continuum approximation, which yields closed-form expressions that are accurate when the network density is high.
AB - Cooperative broadcast aims to deliver a source message to a locally connected network by means of collaborating nodes. In traditional architectures, node cooperation has been at the network layer. Recently, physical layer cooperative schemes have been shown to offer several advantages over the network layer approaches. This form of cooperation employs distributed transmission resources at the physical layer as a single radio with spatial diversity. In decentralized cooperation schemes, collaborating nodes make transmission decisions based on the quality of the received signal, which is the only parameter available locally. In this case, critical parameters that influence the broadcast performance include the source/relay transmission powers and the decoding threshold (the minimum signal-to-noise ratio (SNR) required to decode a transmission). We study the effect of these parameters on the number of nodes reached by cooperative broadcast. In particular, we show that there exists a phase transition in the network behavior: if the decoding threshold is below a critical value, the message is delivered to the whole network. Otherwise, only a fraction of the nodes is reached, which is proportional to the source transmit power. Our approach is based on the idea of continuum approximation, which yields closed-form expressions that are accurate when the network density is high.
KW - Broadcast
KW - Continuum
KW - Cooperative communication
KW - Limiting behavior of dense networks
KW - Multihop diversity
KW - Phase transition
KW - Wireless networks
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U2 - 10.1109/TIT.2006.874514
DO - 10.1109/TIT.2006.874514
M3 - Article
AN - SCOPUS:33745168607
SN - 0018-9448
VL - 52
SP - 2531
EP - 2550
JO - IEEE Transactions on Information Theory
JF - IEEE Transactions on Information Theory
IS - 6
ER -