Who hasn’t experienced poor connection quality? Strong noises, distorted voice, slow Internet, access to which periodically disappears - all this is familiar to everyone who has ever used communications. But why is communication so bad?
Instructions
Step 1
The quality of data transmission carried out through a particular channel may deteriorate both through the fault of the user or operator, and for reasons beyond their control. A very common mistake of subscribers of cellular operators is the use of a mobile phone in a basement, an underground passage, an elevator with metal walls. Also, do not forget that many residential buildings are built of reinforced concrete. This material shields electromagnetic radiation to a somewhat lesser extent - in such a house it is sometimes enough to move only half a meter with the apparatus for the reception to improve dramatically. In addition, in a reinforced concrete house, it is difficult to receive decimeter TV channels on an indoor antenna - in this case, it must be brought to the window.
Step 2
The transmission of radio waves in various bands is influenced by weather conditions and even the time of day. Basically, this influence is noticeable on the broadcasting bands - DV, SV, HF, to a much lesser extent - on VHF. Solar radiation affects the ionosphere, which under its influence begins to re-reflect radio waves in a different way. Cellular communication operates in a much higher frequency range - centimeter. Here the influence of the weather is not pronounced, however, in some cases, in sunny weather, the quality of communication drops noticeably. In this case, the ionosphere has nothing to do with it: the devices react to interference created by the sun itself, because it emits not only visible light. It should also be remembered that radiation in these ranges propagates in a straight line, similar to light, and can be obstructed, for example, by buildings.
Step 3
Much depends on the quality of the equipment itself. Radios and televisions have different sensitivity, so two devices of different brands can, being nearby, receive the signal of the same transmitter with different quality. The parameters of the radio modules of cell phones and 3G modems are also different, the same applies to the antennas built into them.
Step 4
Almost all consumer electronics these days are equipped with switching power supplies. Most of the low-frequency ranges are affected by interference from them. For this reason, long, medium and short wave reception in the city is difficult, but still possible with a good outdoor antenna. Pulse power supplies have almost no effect on the operation of VHF receivers, televisions and cellular communications.
Step 5
Wired and cellular telephone communications, as well as Internet access, are carried out through the so-called dial-up channels. This means that with each connection, a chain of nodes that are currently free is automatically built. Sometimes it is enough to forcefully break the connection and re-establish it to improve the connection. In some smartphones, in particular, on the Symbian platform, for the forced disconnection of the Internet connection, there is a so-called "Connection Manager" (in older versions - "Connection Manager").
Step 6
When accessing the Internet via a cellular channel, one more factor is added to the above factor - the change of base stations. Due to the continuous changing conditions of reception, even a stationary telephone can periodically switch from one station to another - the one whose signal is stronger at the moment. However, if the equipment is malfunctioning or overloaded at one of the stations, the switch to which was carried out recently, the restoration of the Internet connection may not occur immediately. Especially often this situation occurs if the handover is carried out from a station supporting 3G to a station that is incompatible with this standard, or vice versa. Sometimes there are also such malfunctions of base stations that prevent the connection to the Internet in general, while the voice communication works normally. Sometimes it is enough to call the operator's support service, say that the Internet does not work for you, inform your location, and the malfunction will soon be eliminated.
