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| Number | Title | Issue Date |
| 5278835 | Mobile radio communication system A mobile radio communication system of this invention includes a plurality of base stations connected to a network through wire lines, respectively, and a plurality of mobile stations respectively connected to the base stations through radio channels. A p... | 01/11/1994 |
| 5276730 | Access method for distributed dynamic channel allocation in microcells A method of providing local autonomous control of channel allocation of a cellular telecommunications network. In one prior art method, which can be identified as the timid method, a channel is selected for use by an incoming user if it is not being used ... | 01/04/1994 |
| 5263176 | Method of assigning optimal channel in multi-station radio communications system In a multi-station radio communications system wherein plural channels are accessible for communication between plural fixed stations and plural mobile units (viz., dynamic channel assignment) and wherein each of plural fixed stations selects a channel ac... | 11/16/1993 |
| 5222249 | Dynamic RF communication resource access by roving mobile units A method and system are set forth for providing dynamic RF communication resources to a mobile unit as that mobile unit changes geographic areas such that RF communication resource use by that mobile unit is generally not forcibly terminated as that mobil... | 06/22/1993 |
| 5212804 | Communication system having multiple base stations and multiple mobile units An air-to-ground communications system is described for controlling multiple two way radiotelephone conversations between a large number of aircraft (53) and a network of base stations (51) that are capable of being interconnected to landline telephone ne... | 05/18/1993 |
| 5210753 | Robust scheduling mechanm for efficient band-width usage in muliticell wireless local networks A wireless communications network includes a local area network connected to a plurality of nodes which perform bidirectional wireless communication with mobile stations as controlled by a controller. Each node has a geographic area, termed a cell, within... | 05/11/1993 |
| 5185739 | Time-allocation of radio carriers In a TDMA cellular system, there is provided a mechanism for splitting the allocation of time slots within a TDM frame between adjacent coverage areas. There is provided a method of and apparatus for time-allocation of TDMA channels. It comprises: periodi... | 02/09/1993 |
| 5109527 | Mobile radio communications method avoiding unnecessary transmissions in environment of unknown channel allocation A method of communication in at least one cellular mobile radio system in an environment of additional mobile radio systems with mobile stations capable of communication with more than one of the systems on any of a predetermined group of radio channels, ... | 04/28/1992 |
| 5081671 | Method of reducing blockages in handing over calls in a mobile, cellular telephone system A method of reducing blockages and call interruption in handling over calls in a cellular mobile radio system. When the signal strength from a base station to a mobile and vice versa falls below a given value the handover shall take place to another base ... | 01/14/1992 |
| 5021801 | Antenna switching system An antenna switching system for handling high traffic sectors in a cellular radiotelephone system. The system switches the cell's base station transmitters to sectors that have more mobile traffic than they can handle. The additional transmitters increase... | 06/04/1991 |
| 4977589 | Signalling and control protocol for a communication system A signalling and control protocol is provided wherein each subscriber unit (106) operating within a communication system (100) must transmit a request (200, 200' or 200") to communicate to a central station. If a communication channel is available, the ce... | 12/11/1990 |
| 4792984 | Radio channel control method for mobile communication system A radio channel control method for a narrow-zone mobile communication system in which a plurality of base stations share a plurality of channels and each selects any of the channels for setting up a call independently of the others, e.g. a portable teleph... | 12/20/1988 |
| 4144496 | Mobile communication system and method employing frequency reuse within a geographical service area A communication method and system for providing two-way radio communication links between fixed stations and mobile units, particularly suitable for use in mobile telephone communications. A geographical service area is sectionalized through the use of om... | 03/13/1979 |
