Please use this identifier to cite or link to this item:
|Title:||Cross-layer adaptive transmission with incomplete system state information|
Partially observable Markov decision processes
|Citation:||Hoang, A.T., Motani, M. (2008). Cross-layer adaptive transmission with incomplete system state information. IEEE Transactions on Communications 56 (11) : 1961-1971. ScholarBank@NUS Repository. https://doi.org/10.1109/TCOMM.2008.060618|
|Abstract:||We consider a point-to-point communication system in which data packets randomly arrive to a finite-length buffer and are subsequently transmitted to a receiver over a timevarying wireless channel. Data packets are subject to loss due to buffer overflow and transmission errors. We study the problem of adapting the transmit power and rate based on the buffer and channel conditions so that the system throughput is maximized, subject to an average transmit power constraint. Here, the system throughput is defined as the rate at which packets are successfully transmitted to the receiver. We consider this buffer/ channel adaptive transmission when only incomplete system state information is available for making control decisions. Incomplete system state information includes delayed and/or imperfectly estimated channel gain and quantized buffer occupancy. We show that, when some delayed but error-free channel state information is available, optimal buffer/ channel adaptive transmission policies can be obtained using Markov decision theory. When the channel state information is subject to errors and when the buffer occupancy is quantized, we discuss various buffer/ channel adaptive heuristics that achieve good performance. In this paper, we also consider the tradeoff between packet loss due to buffer overflow and packet loss due to transmission errors. We show by simulation that exploiting this tradeoff leads to a significant gain in the system throughput. © 2008 IEEE.|
|Source Title:||IEEE Transactions on Communications|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 8, 2018
WEB OF SCIENCETM
checked on Jul 31, 2018
checked on Feb 25, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.