D Niyato, E Hossain
For me, this was an introduction to rrm in multihop ofdm-mimo networks. I also learned about reinforcement learning algorithms.
Wednesday, June 17, 2009
Tuesday, May 19, 2009
CAPTURE EFFECT IN IEEE 802.11 BASIC SERVICE AREA UNDER INFLUENCE OF RAYLEIGH FADING AND NEAR/FAR EFFECT
Zoran Hadzi-Velkov Boris Spasenovski
The article proposes two models for the capture effect.
The article proposes two models for the capture effect.
Thursday, March 26, 2009
Multiuser OFDM with Adaptive Subcarrier, Bit, and Power Allocation
Cheong Yui Wong, Roger S. Cheng, Member, IEEE,
Khaled Ben Letaief, Senior Member, IEEE, and Ross D. Murch, Senior Member, IEEE
The idea and the algorithm to assign carriers to users in ofdma.
Khaled Ben Letaief, Senior Member, IEEE, and Ross D. Murch, Senior Member, IEEE
The idea and the algorithm to assign carriers to users in ofdma.
Saturday, February 28, 2009
Could NACKs be useful in relay-assisted networks?
In WLAN IEEE 802.11, there is only positive acknowledges. Nevertheless, in a relay-assisted network, a negative acknowledgement might help the relay to decide whether it is in a favorable position to re-send the packet.
Thursday, February 26, 2009
IEEE 802.11n Development: History, Process and Technology
Eldad Perahia
Today I re-read this article and I think it is very interesting. I think that CSMA/ECA should be included in upcoming standards.
Today I re-read this article and I think it is very interesting. I think that CSMA/ECA should be included in upcoming standards.
Tuesday, February 10, 2009
Monday, February 9, 2009
Investigating the Validity of IEEE 802.11 MAC Modeling Hypothesis
K.D. Huang, K.R. Duffy, D.Malone and D.J. Leith
I should verify our model for CSMA/ECA to double-check whether we are using the (A3) and (A4) hypothesis or not. In any case, as the authors concede, the violation of hypothesis (A4) does not affect goodput predictions.
I should verify our model for CSMA/ECA to double-check whether we are using the (A3) and (A4) hypothesis or not. In any case, as the authors concede, the violation of hypothesis (A4) does not affect goodput predictions.
Wednesday, February 4, 2009
On the Shaping Introduced by IEEE 802.11 Nodes in Long-Range Dependent Traffic
David Rincón , David Remondo , and Cristina Cano
If we change CSMA/CA for CSMA/ECA, would the results presented in the paper differ?
If we change CSMA/CA for CSMA/ECA, would the results presented in the paper differ?
Monday, January 12, 2009
Non-Saturation and Saturation Analysis of IEEE 802.11e EDCA with Starvation Prediction
Paal E. Engelstad and Olav N. Osterbo
This paper was very clarifying for me in many ways. It uses Markov Chains and presents an extension to take into account AIFS.
This paper was very clarifying for me in many ways. It uses Markov Chains and presents an extension to take into account AIFS.
Sunday, January 11, 2009
TCP Muro
There are two problems with current TCP:
- The slow start in high bandwith-delay links.
- The persistent p2p flows that consume most of the Internet's bandwith.
I believe that if the growing of the congestion window could be modified to increase also as a function of time at the beginning, the two problems would be solved. Or, at least, alleviated.
- The slow start in high bandwith-delay links.
- The persistent p2p flows that consume most of the Internet's bandwith.
I believe that if the growing of the congestion window could be modified to increase also as a function of time at the beginning, the two problems would be solved. Or, at least, alleviated.
Sunday, January 4, 2009
Game-theoretical approach to CSMA/ECA
It might be possible to show that a deterministic backoff after successes and a random backoff after failures is the nash equilibrium of a game.
Or maybe the nash equilibrium is a bit more complex: using a random backoff only if the collision resulted from a random backoff. This leads to a quick convergence protocol, a bit unfair by those that not find their place (slot) immediately.
Or maybe the nash equilibrium is a bit more complex: using a random backoff only if the collision resulted from a random backoff. This leads to a quick convergence protocol, a bit unfair by those that not find their place (slot) immediately.
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