Uplink Reference Signals for Energy-Efficient Handover
The ever-growing data rate demand from cellular users increases the associated power consumption that directly contributes to the global warming of the environment. Also, achieving high system capacity by increasing the density of the base stations (BSs) increases the number of handovers (HOs) which...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9181552/ |
| _version_ | 1798001735491387392 |
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| author | Muhammad Tayyab George P. Koudouridis Xavier Gelabert Riku Jantti |
| author_facet | Muhammad Tayyab George P. Koudouridis Xavier Gelabert Riku Jantti |
| author_sort | Muhammad Tayyab |
| collection | DOAJ |
| description | The ever-growing data rate demand from cellular users increases the associated power consumption that directly contributes to the global warming of the environment. Also, achieving high system capacity by increasing the density of the base stations (BSs) increases the number of handovers (HOs) which for moderate-to-high-speed users implies significant signaling traffic overhead. One of the key research objectives of this paper is to identify the different signaling overheads occurring during the HO procedure in current 3GPP cellular networks (e.g. Long Term Evolution (LTE)/ New Radio (NR)) and, among those, which are the main contributors to power consumption. Specifically, we analyze the impact of signaling messages transmitted and received during HO on the power consumption for both the BS and the User Equipment (UE). System-level simulations are performed for a detailed quantitative analysis. Our analysis shows that the transmission of the measurement reports is the largest contributor to air-interface signaling and that its contributed total power consumption is higher than the random access channel (RACH) signaling and the signaling confirming the HO. To eliminate measurement reports and effectively reduce the power consumption associated with the HO in future networks, we propose a HO procedure that exploits uplink (UL) reference signals (RSs), namely the sounding reference signal (SRS), transmitted by UEs. The numerical results show that the proposed SRS-based method reduces the total power consumption during the HO procedure by 30% in comparison to the legacy downlink RS based measurement method in current cellular networks. Also, this method improves the UE battery lifetime by reducing the RS transmissions and measurements significantly, UE transmitted power consumption by 48% and received power consumption by 27%. |
| first_indexed | 2024-04-11T11:40:54Z |
| format | Article |
| id | doaj.art-2c433bed39484c5580f9c896f7da60be |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-11T11:40:54Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-2c433bed39484c5580f9c896f7da60be2022-12-22T04:25:50ZengIEEEIEEE Access2169-35362020-01-01816306016307610.1109/ACCESS.2020.30206189181552Uplink Reference Signals for Energy-Efficient HandoverMuhammad Tayyab0https://orcid.org/0000-0003-1860-7372George P. Koudouridis1Xavier Gelabert2https://orcid.org/0000-0003-1343-1312Riku Jantti3https://orcid.org/0000-0002-5398-2381Huawei Technologies Oy (Finland) Company Ltd., Helsinki, FinlandHuawei Technologies Sweden AB, Kista, SwedenHuawei Technologies Sweden AB, Kista, SwedenDepartment of Communications and Networking, School of Electrical Engineering, Aalto University, Espoo, FinlandThe ever-growing data rate demand from cellular users increases the associated power consumption that directly contributes to the global warming of the environment. Also, achieving high system capacity by increasing the density of the base stations (BSs) increases the number of handovers (HOs) which for moderate-to-high-speed users implies significant signaling traffic overhead. One of the key research objectives of this paper is to identify the different signaling overheads occurring during the HO procedure in current 3GPP cellular networks (e.g. Long Term Evolution (LTE)/ New Radio (NR)) and, among those, which are the main contributors to power consumption. Specifically, we analyze the impact of signaling messages transmitted and received during HO on the power consumption for both the BS and the User Equipment (UE). System-level simulations are performed for a detailed quantitative analysis. Our analysis shows that the transmission of the measurement reports is the largest contributor to air-interface signaling and that its contributed total power consumption is higher than the random access channel (RACH) signaling and the signaling confirming the HO. To eliminate measurement reports and effectively reduce the power consumption associated with the HO in future networks, we propose a HO procedure that exploits uplink (UL) reference signals (RSs), namely the sounding reference signal (SRS), transmitted by UEs. The numerical results show that the proposed SRS-based method reduces the total power consumption during the HO procedure by 30% in comparison to the legacy downlink RS based measurement method in current cellular networks. Also, this method improves the UE battery lifetime by reducing the RS transmissions and measurements significantly, UE transmitted power consumption by 48% and received power consumption by 27%.https://ieeexplore.ieee.org/document/9181552/3GPP cellular networks (LTE/NR)handoversignaling overheadspower consumptionuplink reference signalsounding reference signal (SRS) |
| spellingShingle | Muhammad Tayyab George P. Koudouridis Xavier Gelabert Riku Jantti Uplink Reference Signals for Energy-Efficient Handover IEEE Access 3GPP cellular networks (LTE/NR) handover signaling overheads power consumption uplink reference signal sounding reference signal (SRS) |
| title | Uplink Reference Signals for Energy-Efficient Handover |
| title_full | Uplink Reference Signals for Energy-Efficient Handover |
| title_fullStr | Uplink Reference Signals for Energy-Efficient Handover |
| title_full_unstemmed | Uplink Reference Signals for Energy-Efficient Handover |
| title_short | Uplink Reference Signals for Energy-Efficient Handover |
| title_sort | uplink reference signals for energy efficient handover |
| topic | 3GPP cellular networks (LTE/NR) handover signaling overheads power consumption uplink reference signal sounding reference signal (SRS) |
| url | https://ieeexplore.ieee.org/document/9181552/ |
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