Congestion Relief in Subway Areas by Tuning Uplink Power Control in LTE
| Autor: | Adriano Mendo, Salvador Pedraza, Ana Belen Vallejo-Mora, Salvador Luna-Ramírez, Matías Toril |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Computer Networks and Communications business.industry Quality of service 05 social sciences Aerospace Engineering 050801 communication & media studies 020206 networking & telecommunications 02 engineering and technology Spectral efficiency Transmitter power output 0508 media and communications Traffic congestion Handover Automotive Engineering Telecommunications link 0202 electrical engineering electronic engineering information engineering Cellular network Electrical and Electronic Engineering business Nominal power (photovoltaic) Computer network |
| Zdroj: | IEEE Transactions on Vehicular Technology. 66:6489-6497 |
| ISSN: | 1939-9359 0018-9545 |
| Popis: | Providing an adequate quality of service in subway areas is a challenging task in cellular networks, due to the complexity of the indoor propagation and the effects of group mobility. Thus, it is common that traffic congestion appears in subway cells. In this paper, a self-tuning method for uplink power control (ULPC) parameters is proposed to solve congestion problems in long-term evolution (LTE) cells located in a subway network. First, a thorough analysis of congestion phenomena in LTE subway cells is presented. The aim of the analysis is to show how uplink performance is severely degraded with group mobility in subway cells. Then, a heuristic algorithm is proposed to tune the nominal power parameter in ULPC on a cell basis to solve localized congestion problems. The aim of the algorithm is to exploit cell isolation by increasing user transmit power to improve system spectral efficiency and thus reduce the average cell load. Field trial results show that the algorithm significantly improves network accessibility and retainability in subway scenarios without any hardware upgrade. |
| Databáze: | OpenAIRE |
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