search query: @supervisor Tirkkonen, Olav / total: 43
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| Author: | Siarnik, Michal |
| Title: | Performance analysis of interference mitigation methods in Time Domain LTE |
| Publication type: | Master's thesis |
| Publication year: | 2015 |
| Pages: | viii + 54 Language: eng |
| Department/School: | Sähkötekniikan korkeakoulu |
| Main subject: | Radio Communications (S3019) |
| Supervisor: | Tirkkonen, Olav |
| Instructor: | Dowhuszko, Alexis |
| Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201505283002 |
| Location: | P1 Ark Aalto 2848 | Archive |
| Keywords: | interference mitigation time domain LTE cell clustering uplink power control fixed and flexible sub-frames |
| Abstract (eng): | The dynamic allocation of communication resources in a Time Domain Long Term Evolution (TD-LTE) system is convenient to match the instantaneous traffic demands of the users, but may result in serious cross-link interference whenever neighbouring cells transmit in opposite directions. The cross-link interference is especially harmful for the performance in Uplink (UL), and may significantly degrade the overall performance of a mobile network. Thus, it is of great importance to study interference mitigation methods to keep this impairment under control. This thesis describes the principles of cross-link interference in the context of TD-LTE networks, and provides an overview of the proposed methods in 3rd Generation Partnership Project (3GPP) standardization to keep this impairment under control. The main part of this thesis consists in a simulation-based performance analysis of two interference mitigation methods: cell clustering and dual UL power control. Dense small cell deployments in urban areas will grow in importance, and both selected interference mitigation methods are suitable candidates in such deployment scenarios. It is assumed that small cell Base Stations (BSs) operate on a higher frequency band for local access, and thus interference coming from macro cell BS is avoided. The interference mitigation methods that are studied in this thesis use different approaches to keep the cross-link interference under control. Nevertheless, it is shown that both methods achieve performance gains in UL direction that surpass considerably the performance impairment that is observed in Downlink (DL). Furthermore, it is shown that the combination of both interference mitigation methods (i.e., cell clustering and dual UL power control) with appropriate configuration parameters offers a better performance gain in UL than the separate deployment of either of these methods. |
| ED: | 2015-06-21 |
INSSI record number: 51481
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