Reducing LTE Uplink Transmission Energy by Allocating Resources

The effect of physical resource block (PRB) allocation on an LTE modem's transmit power and total modem energy consumption is examined. In this paper the uplink resource blocks are scheduled in either a Frequency Division Multiple Access (FDMA) or Time Division Multiple Access (TDMA) manner, to determine if low transmission power & long transmission time or high transmission power & short transmission time is most energy efficient. It is important to minimize the LTE modem's energy consumption caused by uplink transmission because it affects phone battery time, and because researchers rarely focus on energy consumption when they optimize network controlled uplink transmission power parameters. Simulations based on a simple traffic model and a power consumption model show the TDMA scheme, where one user is allocated all 48 PRBs in a 10 MHz channel, is at least 24 % more energy efficient than the FDMA like approach with 8 PRBs per user. Furthermore the TDMA scheme decreases the average transmission time with minimum 24 %.

[1]  Carsten F. Ball,et al.  Contrasting Open-Loop and Closed-Loop Power Control Performance in UTRAN LTE Uplink by UE Trace Analysis , 2009, 2009 IEEE International Conference on Communications.

[2]  Mariusz Glabowski,et al.  Long‐Term Evolution , 2010 .

[3]  Klaus I. Pedersen,et al.  Performance of Uplink Fractional Power Control in UTRAN LTE , 2008, VTC Spring 2008 - IEEE Vehicular Technology Conference.

[4]  M. Boussif,et al.  Interference Based Power Control Performance in LTE Uplink , 2008, 2008 IEEE International Symposium on Wireless Communication Systems.

[5]  Jiangchuan Liu,et al.  Statistics and Social Network of YouTube Videos , 2008, 2008 16th Interntional Workshop on Quality of Service.

[6]  Antti Toskala,et al.  LTE for UMTS - OFDMA and SC-FDMA Based Radio Access , 2009 .

[7]  Abbas Mohammed,et al.  Performance Evaluation of Uplink Closed Loop Power Control for LTE System , 2009, 2009 IEEE 70th Vehicular Technology Conference Fall.

[8]  Anders Furuskar,et al.  Uplink Power Control in LTE - Overview and Performance, Subtitle: Principles and Benefits of Utilizing rather than Compensating for SINR Variations , 2008, 2008 IEEE 68th Vehicular Technology Conference.

[9]  Antti Toskala,et al.  WCDMA for UMTS: HSPA Evolution and LTE , 2010 .

[10]  Rainer Schoenen,et al.  Long Term Evolution , 2009 .

[11]  Preben E. Mogensen,et al.  Adaptive Transmission Bandwidth Based Packet Scheduling for LTE Uplink , 2008, 2008 IEEE 68th Vehicular Technology Conference.

[12]  Malek Boussif,et al.  Load adaptive power control in LTE Uplink , 2010, 2010 European Wireless Conference (EW).

[13]  Zongpeng Li,et al.  Youtube traffic characterization: a view from the edge , 2007, IMC '07.

[14]  Malek Boussif,et al.  Enhancing uplink performance in UTRAN LTE networks by load adaptive power control , 2010, Eur. Trans. Telecommun..

[15]  Preben E. Mogensen,et al.  UTRAN LTE Downlink System Performance under Realistic Control Channel Constraints , 2009, 2009 IEEE 70th Vehicular Technology Conference Fall.

[16]  J. Wigard,et al.  Balancing power saving and single user experience with discontinuous reception in LTE , 2008, 2008 IEEE International Symposium on Wireless Communication Systems.