I search for some papers about energy harvest,SWIPT and optimization.And i found that there is just one paper to optimize the uplink rate,the others are for optimizing the harvested power,power budget in the transmitter or downlink rate.

So i want to ask why ? why do most of researchers won't optimize the uplink rate?is there any reason or difficulty?

Because in IoT,we may control lots of things,and of course we do need to know some information of the devices or what happened with the devices,that is ,we do need to know some feedback about the device,so we need the device uplink the information back to the transmitter,so i think optimizing the uplink rate is still a worth research topic,why why do most of reseachers optimize the downlink rate instead of uplink rate?

By the way,i also want to ask is the throughput the same as the rate?what is the difference between the throughput and capacity?

  • $\begingroup$ There are indeed many research works for uplink IoT. $\endgroup$ – AlexTP May 31 '19 at 14:26
  • $\begingroup$ where do you find it? most of paper i found is about optimizing downlink rate,less harvested power and power budget,more less for uplink rate $\endgroup$ – XM551 May 31 '19 at 23:56
  • $\begingroup$ For example, ieeexplore.ieee.org/search/… And I said "many", without concluding anything about the comparison with the amount of work for downlink. $\endgroup$ – AlexTP Jun 1 '19 at 7:13

This simply reflects the load asymmetry of real world applications. On most networks, traffic is dominated by content streaming, which is a download activity. Netflix alone accounts for 15% of the world's entire Internet traffic.

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  • $\begingroup$ so you mean most of device will do "download" from somewhere,instead of "upload" to somewhere,so we care the rate of download more than uplink ? $\endgroup$ – XM551 May 31 '19 at 12:58
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    $\begingroup$ Not quite: the amount of data that devices "download" is typically a lot bigger, than the amount of data they upload. $\endgroup$ – Hilmar May 31 '19 at 14:30

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