Which one consumes more power, mobile network or Wi Fi?

The following is the Which one consumes more power, mobile network or Wi Fi? recommended by recordtrend.com. And this article belongs to the classification: network service.

You can imagine that when you spend a long day in college and take the subway home, you can connect public Wi Fi to play your favorite podcasts in the subway, but you find that the power of your mobile phone is very low – less than 15%. At this time, you will feel in a dilemma. You don’t want to suspend podcasts and want to keep a certain power before you go home, so turn off Wi Fi, Even if mobile data is turned on, the mobile phone battery is still dead. In the end, you have to stop all mobile applications and turn off mobile data.

What else can you do in this situation? Let’s find out.

Why does connecting to the network consume more power?

Whether the mobile phone uses Wi Fi or mobile data, data transmission is required for communication with other devices. This transmission includes two processes. The first is data generation and transmission; The second is data retrieval, which is realized by using transmitter (generating data) and receiver (retrieving data) antennas.

The transmitter contains a slender conductor connected to the AC power supply. When the AC power is transmitted, the electrons begin to oscillate. The oscillation involves the acceleration and deceleration of the charge. The accelerated charge generates electromagnetic waves, which propagate in all directions, and the data is transmitted in the form of electromagnetic waves.

The receiver also contains a slender conductor. When the electromagnetic wave hits the antenna, the electrons absorb energy and begin to oscillate at the same frequency as the incident wave. This electronic oscillation generates AC in the receiving antenna, and then converts the AC into a suitable form (sound, video, text, etc.).

Therefore, it is obvious that energy is used when transmitting and receiving the number of mobile phones, and the energy is provided by the mobile phone battery. The power output decline of the receiver antenna is inversely proportional to the square of the transmitter distance, which means that if the distance between the two antennas is doubled, the output power will be reduced by four times. In order to ensure that the signal strength is not weakened, the transmitter needs more power, This can only be done at the expense of battery power consumption.

Meta analysis: Wi Fi vs GSM power consumption

In order to establish the power consumption difference between GSM and Wi Fi, the researchers simulated some typical use scenarios, including sending e-mail, downloading random data and browsing web pages. The mobile device used is openmoko Neo freerunner, and the other two devices are HTC Dream and Google nexus, which are used to verify the initial observation results of freerunner mobile phones.

The alternating use of mobile data and Wi Fi data can be used to perform the above tasks. The power consumed is measured by the product of the voltage provided in a specific task and the generated current.

Power consumption measurement by mail

The power consumption of receiving and reading five e-mails and replying to two e-mails is as follows: when people send e-mails through Wi Fi, the mobile phone will consume part of the power to maintain the connection between the mobile phone and the network, and the power consumption is about 90 MW. When people send e-mails through mobile phones, the power consumption of Wi Fi is almost zero.

Whether the mobile phone uses Wi Fi or mobile data, data transmission is required for communication with other devices. This transmission includes two processes. The first is data generation and transmission; The second is data retrieval, which is realized by using transmitter (generating data) and receiver (retrieving data) antennas

Download random data

One 15MB file is downloaded through Wi Fi network and the other 50kb file is downloaded through mobile network. The power consumption of the two downloading processes depends on the data throughput (the amount of data transmitted per second), but it is independent of the total file size.

The total power consumption of Wi Fi network is greater than that of mobile phone network, because the data throughput of Wi Fi network is 660.1.

Web browsing data

Obviously, the power consumption of browsing web pages on the mobile network is much greater than that on Wi Fi, which makes the mobile network consume more power than using Wi Fi, because the mobile network always maintains the background network connection in order to receive calls and text messages.

conclusion

Obviously, in real life, mobile network data consumes more energy than Wi Fi, because mobile phones must always maintain call and SMS connections. In addition, compared with Wi Fi routers, mobile network base stations are usually far away. In areas where mobile network base stations cover weak areas, mobile phones receive weak signals, which means that mobile phones must work harder to maintain network connections, This requires more energy.

More reading: the survey shows that 1 / 4 people suffer from “low battery anxiety disorder” The survey shows that 71% of British users value the endurance performance of smart phones. Phonearena: Huawei mate 20, the flagship machine with the best endurance in 2018, won the championship. Phonearena: the iPhone family was far ahead in the ranking of the best endurance mobile phones in 2017. Stanford University in the United States: research shows that the design and coding of mobile websites is rough, which increases the power consumption of mobile phones. LG: most mobile phone users are anxious about power loss. IDC: expected 2020 In, the scale of China’s WiFi 6 market was nearly $200 million. A dynamic chart tells you where the wireless router is placed, and the Wi Fi signal is the best. Ngb: Qualcomm, Huawei, Intel’s leading contribution to Wi Fi 6 technology patents. 2015 global web development trend, past, present and future of free wifi. Tencent lecture hall: uncover the secret: black production is also “Ai”. What shall we do? Sandvine: in September 2013, Netflix and Youtube accounted for 50.29% of the fixed line downlink traffic in prime time in North America. Tencent: the smart home platform war will start in an all-round way. Traditional manufacturers will forcibly cut into the hardware market. Baidu: released the 2012 Q3 mobile Internet development trend report

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