SAFE DEPLOYMENT OF MOBILE COMMUNICATION NETWORK BASE STATIONS. DATA HANDOFF ZONE DETERMINATION IN CELLULAR NETWORKS IN EMERGENCY SITUATIONS
PURPOSE. The issues of relay data transfer (handover) in cellular network technology of multiple access with a temporary (TDMA) and code (CDMA) divisions for safe deployments of mobile network base stations are considered. The purpose of the given work is to develop techniques for secure deployment of base stations of cellular communication networks under conditions of possible emergencies. The object of the study is cellular networks of the third and fourth generations. The subject of the research is methods for the base stations of cellular communication networks safe deployment. METHODS. The paper considers the technologies of multiple access with a temporary (TDMA) and code (CDMA) channels division, methods to determine the radio communication range in emergencies are used. For soft handover, launched with CDMA, the concept of a hypothetical zone handoff is introduced, the method to define its size with consideration of the emergency situation is given. FINDINGS. The communication range dependence on the signal attenuation in the radio link is obtained for determining the size of the soft handover hypothetical zone. The research results allow determining optimal deployment of base stations of cellular communication GSM standard operators to ensure a stable connection. RESEARCH APPLICATION FIELD. Availability of the method for base stations secure deployment of cellular communication network for JSC “RZD” is an important step to quality and effective improvement of the technological communication organization and rapid response in emergency situations. CONCLUSIONS. The obtained dependence on the communication range attenuation in the radio link is advisable when values range from 180 m to determine the hypothetical soft handover zone size. In perspective, the developed methodology is expected to be applied to other generations and a technology of cellular networks at transportation means to ensure a strong connection along the whole area covered by the radio signal.