Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Joint pilot power adjustment and base station assignment for data traffic in cellular CDMA networks
AU - Shabany, Mahdi
AU - Navaie, Keivan
PY - 2004
Y1 - 2004
N2 - A novel framework to model the problem of downlink resource allocation in heterogeneous CDMA cellular networks is presented which leads to utilizing the network resources in more efficient way. First, to manage fundamental coverage-capacity tradeoff for the downlink, we propose the notion of effective area to develop a Base Station (BS) Pilot Power Adjustment (PPA) scheme. Using effective area, PPA periodically adjusts BS pilot power based on both traffic load and coverage area. After adjusting the pilot powers, we use the dynamic pricing platform to formulate downlink resource allocation based on a novel defined utility function. This utility function quantifies the degree of utilization of resources. As a matter of fact, using the defined utility function, we track users' channel fluctuations and their delay constraints along with the load conditions of all BSs. Unlike previous work, we solve the problem with the general objective of maximizing the total network utility instead of achieved utility of each BS. It is shown that this problem is equivalent to finding the optimum BS assignment throughout the network which is mapped to a Multi-dimensional Multiple-choice Knapsack Problem (MMKP). Since MMKP is NP-Hard, a polynomial-time suboptimal algorithm is then modified to develop an efficient base station assignment.
AB - A novel framework to model the problem of downlink resource allocation in heterogeneous CDMA cellular networks is presented which leads to utilizing the network resources in more efficient way. First, to manage fundamental coverage-capacity tradeoff for the downlink, we propose the notion of effective area to develop a Base Station (BS) Pilot Power Adjustment (PPA) scheme. Using effective area, PPA periodically adjusts BS pilot power based on both traffic load and coverage area. After adjusting the pilot powers, we use the dynamic pricing platform to formulate downlink resource allocation based on a novel defined utility function. This utility function quantifies the degree of utilization of resources. As a matter of fact, using the defined utility function, we track users' channel fluctuations and their delay constraints along with the load conditions of all BSs. Unlike previous work, we solve the problem with the general objective of maximizing the total network utility instead of achieved utility of each BS. It is shown that this problem is equivalent to finding the optimum BS assignment throughout the network which is mapped to a Multi-dimensional Multiple-choice Knapsack Problem (MMKP). Since MMKP is NP-Hard, a polynomial-time suboptimal algorithm is then modified to develop an efficient base station assignment.
KW - utility function
KW - knapsack problem
U2 - 10.1109/SARNOF.2004.1302870
DO - 10.1109/SARNOF.2004.1302870
M3 - Conference contribution/Paper
SN - 0780382196
SP - 179
EP - 183
BT - Advances in Wired and Wireless Communication, 2004 IEEE/Sarnoff Symposium on
PB - IEEE
CY - New York
T2 - IEEE/Sarnoff Symposium on Advances in Wired and Wireless Communication
Y2 - 26 April 2004 through 27 April 2004
ER -