Energy Saving Scheme for Multicarrier HSPA plus Under Realistic Traffic Fluctuation

Maliha U. Jada, Mario Garcia-Lozano*, Jyri Hämäläinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

In the near future, an increase in cellular network density is expected to be one of the main enablers to boost the system capacity. This development will lead to an increase in the network energy consumption. In this context, we propose an energy efficient dynamic scheme for HSDPA+ (High Speed Downlink Packet Access-Advanced) systems aggregating several carriers and which adapts dynamically to the network traffic. The scheme evaluates whether node-B deactivation is feasible without compromising the user flow throughput. Furthermore, instead of progressive de-activation of carriers and/or node-B switch-off, we evaluate the approach where feasible combination of inter-site distance and number of carriers is searched to obtain best savings. This is done by also considering the effect of transition delays between network configuration changes. The solution exploits the fact that re-activation of carriers might permit turning off other BSs earlier at relatively higher load than existing policies. Remote electrical downtilt is also considered as a means to maximize the utilization of higher modulation and coding schemes in the extended cells. This approach promises significant energy savings when compared with existing policies - not only for low traffic hours but also for medium load scenarios.

Original languageEnglish
Pages (from-to)247-258
Number of pages12
JournalMobile Networks and Applications
Volume21
Issue number2
DOIs
Publication statusPublished - Apr 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Multicarrier HSPA
  • Energy saving
  • Cell switch off
  • Carrier management

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