Nexus - 0303 - New Times Magazine-pages

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has a good idea where your MP is. Very simple mathematics in that case, and a good enough result. By just switching on your MP, the PC will have a good idea where your MP is in relation to the differ- ent PC towers. The location of your trans- mission is very much dependent on the ter- rain you are surrounded by. Yes, your PC may be able to detect if you are travelling and how fast you are travelling. But in a case like this, a more sophisticated software must interpret the data coming from the MTNC. This inter- pretation will depend on the terrain, foliage, weather, etc., and the configuration of the network. The result may be an accu- racy of a few metres or a few kilometres. To find the position of something, the usual method is called "triangulation", but this may not require three receiving antennas or devices. These days one receiving device is sufficient, maybe two receiving devices in the case of a mobile phone. Yes, I agree that a mobile phone may be a radiation-emitting ID tag if you switch it on—not if you switch it off. To have trans- mission when the MP is switched off, we are talking of resonant circuitry which is possible, but improbable due to the mil- lions of phones which may respond to the same command. I hope I have answered some of the ques- tions raised in Letters to the Editor last issue by Neil C. from North Yorkshire, England. G. M., Corinda, Queensland, Australia. parameters in MTNC), then your MP will be put in a roaming mode—which means that instead of giving your position to the network every 30 minutes, your MP will be transmitting every three seconds. You have no manual control on this. This is done automatically by the MTNC which controls your MP. During that time, you may be handed over from one tower to another. The network computer will always try to choose the best 30 parameters for you, so you can have the best reception and best transmission possible with the least interference possible. That is one of the reasons why you may drain your bat- tery in the roaming mode because your MP is forced to transmit your MP status every three seconds rather than every 30 minutes. E) When you make a call or receive a call, you are transferred to a different com- munication channel, called talked channel (TC). The monitoring of these thirty para- meters will happen without your knowing it is happening. All these connection puls- es are totally transparent to any voice com- munication. You can not hear your MP being adjusted by the MTNC. All these parameters are proprietary information which is difficult to obtain. In the case of the Mobile Phones letter to the editor, yes, a PC, by using a special positioning software, can pinpoint accu- rately the location of your transmission if you are in an area with few telecommuni- cation obstacles. Because your MP trans- mits its position all the time, you don't need to talk or receive on your MP. The MTNC Dear Editor: You have some great arti- cles in NEXUS. I would like to comment on "Mobile Phones’ Hidden Agenda" in Letters to the Editor [vol. 3#2]. A phone company (PC), like many mobile phone communication carriers, con- trols up to thirty receiving/transmitting parameters on your mobile phone. Each single mobile phone (MP) is controlled by the mobile telephone network computer (MTNC). A) When you switch on your mobile phone, immediately your MP will send a pulse to any PC receiving station on the connection channel. As soon as your MP is switched on, it will start communicating with the 'best' tower and its MTNC. This is totally independent of your receiving, transmitting, talking, listening or standing by. These connections and status pulses are not picked up by the human ear and -usually are not reaching your receiving headphone. Your MP transmits a pulse on the connection channel (CC), which con- tains: * the identification of your phone which corresponds to your mobile tele- phone number which, in turn, has your name and address attached to it in the com- puter data banks; * the type of phone you are using; * the power at which you are transmitting; * other proprietary informa- tion specific to your phone on the particular phone network. B) One of the best PC receiving stations will transmit back to you on another CC. It will: * adjust remotely the power of your MP (if you are too close or too far from the receiving tower); * adjust some characteris- tic of your MP. C) Without your moving, because all this is done in a matter of seconds, the MTNC will decide if it is better to hand you over to the receiving/transmitting tow- ers A, B, C or D or any number of towers located miles apart. These are the PC tow- ers which have reccived your signal. It doesn't matter how faint your signal may have been received. D) If your signal at the PC tower is received below 70 microvolts (it may vary depending on the manual tuning of the THAT'S RIGHT, OUR Arena TRANSFER MACHINES ARE SELUNG FOR HALE Rice THIS WEEK. Ze Toe fase EG AES he Ya NEXUS ¢ 51 APRIL-MAY 1996 MOBILE PHONE CONNECTIONS