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Battery consumption of POC Radio

Date:Nov 30, 2020

As the 2G/3G network enters the phase of retiring, the 4G spectrum continues to increase, and 4G base stations nationwide have exceeded 5 million. The excellent network coverage has made 4G technology the first choice for the public network intercom industry.


Public network intercom

It provides convenient dispatch and command guarantee for government affairs, engineering, hotels, transportation, hospitals and other scenarios, and the frequency of use of the terminal is very high. With the addition of a large number of users, the 4G public network intercom industry has gradually exposed some pain points, and battery life has become one of the most critical indicators.

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It is understood that the current standby time of public network intercom is still lower than that of traditional analog intercoms:


The standby time of the 4000mAh new battery analog walkie-talkie can exceed 10 days.


The standby time of Android public network intercom (POC) can exceed 7 days.


The standby time of 4G module public network intercom (POC) is generally only 3-4 days.

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How to improve the standby endurance of public network walkie-talkies has become an important direction for improving user experience. From the user's perspective, whether a public network walkie-talkie saves power can not only reduce the user's frequent charging operations on the device, increase the working time of each device, but also increase the battery life, both in terms of efficiency and cost. There is a great improvement. In extreme situations such as outdoors, a power-saving public network walkie-talkie is a guarantee for life safety.

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Under the premise of meeting the industry's anytime intercom service, the average standby power consumption of 4G modules can be reduced to less than 5mAh. Taking a new 4000mAh battery as an example, the standby time of walkie-talkies without MCU solution can be increased to more than 20 days. MCU solution The standby time of the walkie-talkie can reach at least 8 days. Really achieve "one charge, use at any time".


The communication mode and voice quality of POC products have been adjusted and optimized to achieve a perfect balance between power consumption and performance.


The five features of low-power standby mode are as follows:


1. The heartbeat package of the public network intercom POC platform can be dynamically set;


2. The average power consumption of the whole machine can be as low as 5mA;


3. The low-power standby working mode has been optimized to the delay (800ms-1200ms), which is slightly higher than the called delay (300ms-600ms) of the non-ultra-low power standby working mode, and has almost no impact on the user's real-time experience.

Note: Delay the time from the calling party's outgoing call to the called party's voice output;


4. There is no increase in the probability of abnormal call drops in ultra-low power standby mode;


5. The voice effect of the call is without distortion;


Utilize 4G module public network intercom (POC) "super" power saving solution-low power consumption standby mode.


As the 2G/3G network enters the phase of retiring, the 4G spectrum continues to increase, and 4G base stations nationwide have exceeded 5 million. The excellent network coverage has made 4G technology the first choice for the public network intercom industry.


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Common sense: conventional walkie-talkies usually refer to battery standby standards


1. Battery capacity: If the battery of the walkie-talkie is generally high, it can be 1300mAh or 1500mAh, and the larger ones are from 1800mAh to 20001800mAh, and even larger.


2. The standby current of the walkie-talkie: standby current refers to the current of the walkie-talkie when there is no signal, usually an average value, generally 20mA-60mAh, that is, the average value is 40mAh.


3. The receiving current of the walkie-talkie: It depends on the volume of the walkie-talkie. Generally, 0.5W is the best volume, and the power consumption is about 70mAh-80mAh + machine current 60mAh is about 140mAh.


4. Conclusion:


1. Assuming that the walkie-talkie is not working (no transmission or reception), the standby time of the walkie-talkie is equal to "battery capacity divided by standby current = standby time"


Example: 1500mAh battery divided by 40mAh standby current ≈ 37.5 hours.


2. Assuming that the walkie-talkie has no transmission, always standby, and sometimes receives (10 minutes to receive a 1 minute signal), then the standby time of the walkie-talkie is equal to "battery capacity divided by (9/10*40mAh+1/10*140mAh)"


Example: 1500mAh battery divided by (9/10*40mAh+1/10*140mAh) standby receiving time≈30 hours.


3. If you add transmission, assuming a 4W machine with a working current of 1.4A (1400mAh), speaking times per hour, each time is 10 seconds for one minute.


Then the working time of the battery is:


Battery capacity 1500/(1/60*1400mAh+6/60*140mAh+53/60*40mAh) working time ≈ 20.6 hours.