The article states the development trend of mobile phones and the characteristics of power consumption. It focuses on the power consumption of smartphones that are most concerned about nowadays, and introduces two methods for measuring the power consumption of mobile phone software. It also explains why operators have previously proposed to charge WeChat fees, what is the heartbeat mechanism.
Jon Rubinstein, CEO of the famous American mobile phone company Palm, once said: "The future development of mobile phones depends on two factors, one is the data transmission speed of the mobile phone; the second is the standby time of the mobile phone."
Why is the phone's standby time so important?
Now, the speed of mobile Internet has been greatly improved, and it is still developing non-stop 4G. The 5G.4G network can increase the speed of mobile phones to more than 100Mbps. Simply put, download a song without 1 second, download one. The film is less than 1 minute. Now the 5G network is being developed and planned, and the speed of accessing the Internet through mobile phones can reach 1Gbps. So it is conceivable that in the case of data speed is no longer limited, "smart phones" combined with various application software and "cloud" computing, the future The phone will become a real "mobile terminal." Mobile ID card, mobile banking, mobile wallet, mobile phone transportation card, mobile navigation, mobile smart driving... All things are done through the network using this "mobile phone".
When the "mobile phone" has become you, it is inseparable from the "terminal" at all times. Is the mobile phone dead, is it very deadly?
The reason for the short standby time of the mobile phone is complicated, including the standby power consumption of the mobile phone, the talk time, the Internet time, the strength of the wireless signal, the GPS navigation, the brightness of the display screen, the background operation of various softwares, and the battery capacity, etc., which affect the standby time. . Usually we are most concerned about the length of time the phone has been switched from the last charge to the automatic shutdown of the phone or the low battery.
To fully analyze and optimize the standby time of mobile phones, mobile phones, batteries, and charging management should not be less. Let us call them "three-piece mobile phones" for the time being. Let us start with the power consumption characteristics of mobile phones!
Mobile phone development trends and power consumption characteristicsSmartphones are becoming more and more popular, hardware processing capabilities are getting stronger, and more and more software applications are supported.
We can't help but have another worry. The standby time of today's smartphones is already a short board. Will the standby time of smartphones in the future become shorter?
In theory, larger displays, more core processors, and more diverse wireless connectivity technologies will definitely increase the power consumption of mobile phones. At the same time, the functions of mobile phones are also increasing, and the frequency of mobile phones will be more and more frequent. Therefore, it is more important to optimize and manage the power consumption of mobile phones. For example, when you do not operate the mobile phone, you can go to sleep more quickly, and use the pulse form to transmit wireless signals, discontinuous reception and discontinuous transmission.
In order to optimize and improve the power consumption of mobile phones, it is necessary to understand the characteristics of the power consumption of mobile phones or to find out the defects in the power consumption performance of mobile phones.
The characteristics of mobile phone power consumption can be summarized as follows:
1. The current amplitude fluctuates greatly:a) Shutdown leakage current: ~10 to 100nA
b) Sleep current: ~100μA to 10mA
c) Standby current: ~5 to 50 mA
d) Receive status: ~100 to 300 mA (pulse)
e) Launch status: ~1 to 2.5 A (pulse)
f) Application software running: ~100mA to 2A
2. The current changes quickly and dynamically:The figure above shows the current waveform of the GPRS mobile phone transmitting Tx and receiving Rx:
a) The TX current pulse is 0.58 ms and the current is 2.02A;
b) Receive RX current pulse is 1.2ms, current is 143 mA
c) continuous transmission of Tx current pulse interval is 4.6 ms;
d) The current in the idle Idle state is 1 mA.
3. Current is a combination of multiple functions, it is difficult to distinguish who caused the current:The picture above shows the current waveform of the mobile phone from Idle to the display, and then to the dialing process; the combined current of the two is superimposed on the position where the display is turned on and the mobile phone emits the current.
4. It usually takes a long time to track and observe the current.As shown in the above figure, it is necessary to test the duration of the mobile phone call. It is necessary to continuously record the current and voltage changes for 4 hours, analyze the power consumed during the call (843 mAh), and also need to accurately measure the pulse current, which often becomes very difficult.
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