Fractional frequency reuse based downlink resource allocation for two tier femtocell networks | |
| Author | Semasinghe, S.M. Lakshita Prabodini |
| Call Number | AIT Thesis no.TC-12-01 |
| Subject(s) | Femtocells Cell phone systems Wireless communication systems |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Telecommunications |
| Publisher | Asian Institute of Technology |
| Abstract | Femtocells are considered as an energy e±cient way of supporting the demand for high speed wireless tra±c. However, the performances of femto-macro coexisting two tier networks are highly dependent on the resource allocation algorithms used. Most of such algorithms proposed in the recent literature are entirely or partially centralized ones which rely on information exchange among base stations. Frequent information exchanges among base stations can cause a large amount of signaling overheads and hence the overall system throughput is reduced. Therefore, in this work, deriving a dis- tributed resource management algorithm(DRMA) in order to minimize possible cross tier and intra tier interferences for downlink transmission of OFDMA based two tier femtocell networks has been considered. Fractional frequency reuse (FFR) is used to reduce cross tier interference as well as the cell edge interferences of the macro network. Sub carrier allocation is done in a channel gain selective manner using channel state information (CSI) measured by the user equipment (UE). In particular, reference signal receive power (RSRP) measured by each UE in each time slot is utilized to select the best channel for transmission in the next time slot. The proposed DRMA also does power allocation in order to maximize the sum rate at each femto base station. |
| Year | 2012 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Rajatheva, R.M.A.P; |
| Examination Committee(s) | Poompat Saengudomlert;Teerapat Sanguankotchakorn; |
| Scholarship Donor(s) | Thailand (HM King); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2012 |