A high capacity cellular mobile communication system arranged to maintain a mobile station communication path by transferring the mobile station from a shadowed serving base station to a clear base station. A multiport trunk circuit is utilized to establish the communication path between a switching central office and the mobile station through a serving base station. The deterioration of the serving base station radio carrier communication link, brought about by the shadowing of the serving bas...

An automated system that assesses the quality of service provided by a cellular radiotelephone system. The system uses apparatus located at a mobile station that remotely controls apparatus located at a fixed station. A cellular radiotelephone call is placed from the mobile station which is received at the fixed station. When the connection is established, commands are sent from the mobile station to the fixed station that configure and control the operation of the fixed station. Many calls betw...

Using feedback by a system controller from wireless handsets to determine sub-areas which do not have coverage within a wireless telecommunication system. A system controller is responsive to the inability of a wireless handset to handoff to a base station, to record this fact, and requests that the wireless handset continue to monitor for a base station with sufficient transmission power. Note, the active call is lost when the handoff did not occur. When the wireless handset finds a base statio...

A carbon black having an average particle size of at most 13 nm, D.sub.mod of at most 80 nm, a D.sub.1/2 /D.sub.mod ratio of at most 0.6 and at least pH 5.

A technique for reporting faults of a base station in a digital cellular system, includes: a base station management unit having a table storing information of predetermined faults; and a base station including multiple devices, which detects the faults of the devices and reports addresses for accessing relevant fault messages of the table to the base station management unit.

Measuring wireless network performance from a remote site uses a mobile handset that may include an appropriate world wide network browser. A user connects the mobile handset to the remote site via the wireless network which is coupled to the world wide network. Once the connection is made, application software at the measurement site sends commands to the mobile handset and in response the mobile handset sends measurement data to the application software. The application software processes the ...

In response to a testing instruction from a PHSC, the cell range of CS 4a is expanded from a range indicated by a solid line to another range indicated by a broken line in which CS 4a can communicate with CSs 4b, 4g and 4f as well as other CSs not shown adjacent to CS 4a. Under the control of the PHSC, test calls are successively produced from CS 4a and transmitted to CSs 4b, 4g, 4f and all other adjacent CSs not shown to confirm the normality of connection. Then, in a similar manner as describe...

A topology verification process for controlling a Personal Communication Services (PCS) system which includes a plurality of Cordless Fixed Parts (CFP)s. The process includes mapping the spatial relationships of the CFPs utilizing Received Signal Strength Indication (RSSI) vectors resulting from test signals transmitted between the CFPs, to establish the topology of the system; repeating the mapping process after any disruption of power to the system, and comparing the results. Any significant c...

A method of reducing interference within a cellular system (10) by partitioning a designated frequency spectrum within a service coverage area (11, 12, 13, 14, 15, 16, or 17) into a first and at least second spectrum inclusive of the designated frequency spectrum and each with an associated power level. Assignment of communication units to a spectrum and power level are based upon distance from the base site (as determined through signal strength measurements). The spectral content of spectra in...

A system and related device emulates the behavior of mobile networks independently from the manner of collecting data about the behavior of the network obtained through a simulation of field measurements. The system emulates the behavior of the network during the exchange of information between terminals and uses an emulation device comprising two circuit blocks. The first is able to process the information according to time sequences corresponding to those of mobile networks. The second one exc...