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Welcome to the public review site of papers appearing in MobiSys 2012. Here you can find the public review written by a PC member for each paper and the authors' rebuttal to it. You can comment on any of them or add your own opinion. Finally you can vote to "like" or "dislike" a paper by clicking the up or down arrows next to its title.

A Close Examination of Performance and Power Characteristics of 4G LTE Networks by JunxianHuangin papers

[–]dongmian 2 points3 points ago

sorry, this has been archived and can no longer be voted on

DRX mode in RRC_connected state has not been implemented in LTE base stations yet (for both ATT and Verizon). The providers are not fully convinced that DRX in such short periods can result in reasonable energy savings when supporting DRX in RRC_connected state will lead to huge scheduling complexity in base stations.

Therefore, this paper is a very timely study to demonstrate the benefit of using DRX mode. My only concern is that the experiment reported in the paper is limited in its scale, only involving 20 users. Such small number of users can not reveal issues in a real base station, such as scheduling delay, etc. A back-of-the-envelope calculation should be useful to demonstrate how the conclusions of this paper will scale when user number increases to a reasonable level.

Also, I suggest the authors leverage the log viewer provided by Qualcomm to access the detailed timing information in the LTE modem. It should generate more accurate result than the current approach reported in the paper does.