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| Number | Title | Issue Date |
| 5907807 | Dynamic learning of neighboring wireless cells Using dynamic learning techniques by a system controller to determine a subset of neighboring cell sites to which an activity transfer should be attempted. An activity transfer can be a handoff or registration. The neighboring cell sites that should be ch... | 05/25/1999 |
| 5903840 | System and method for adaptive measurement collection and handoff queuing in a radio telecommunications network A system and method for improving handoff performance of a cellular telecommunications network having a serving exchange and a serving cell in which a mobile station is engaged in a call. The system adapts a first timeout period during which signal streng... | 05/11/1999 |
| 5903841 | System and method for simplified handoff operation in a cellular mobile communication system The present invention provides a mobile communication cellular system using the CDMA transmission system which is capable of performing the handoff operation without control of a radio base station control apparatus. The first spread code specified for ea... | 05/11/1999 |
| 5901364 | Arrangement in mobile telecommunication systems for providing for an improved hand-over function An arrangement in mobile telecommunication systems which operate with cells to provide for an improved hand-over function of a mobile unit which is located in a cell which belongs to a first base station to a cell which belongs to a second base station. T... | 05/04/1999 |
| 5898929 | Method and apparatus for synchronizing private radio systems The present invention time and frequency synchronizes a plurality of private radio base stations operating in the coverage area of a land mobile communications network. The mobile network's control channels are used to derive a reference signal. A mobile ... | 04/27/1999 |
| 5896373 | Method for executing handover in a radio extension of an ATM network In the handover of a radio extension of an ATM network there are used markers that are located at fixed locations in the ATM cell stream in order to indicate the ending of an uplink and downlink cell stream, so that the switching of cell streams can be ca... | 04/20/1999 |
| 5889768 | Method of and apparatus for pilot channel acquisition A wireless communication device 100 acquires a pilot channel before an assigned slot when the wireless communication device is operating in the slotted mode of a CDMA system. The wireless communication device comprises a searcher receiver 107 that determi... | 03/30/1999 |
| 5887260 | Mobile communication apparatus, fixed communicaton apparatus, communication system and communication method In a mobile communication apparatus, power consumption at the time of waiting can be reduced, and hand-off can be easily performed to other systems. The mobile communication apparatus is provided with a memory part (32) which memorizes a selection signal ... | 03/23/1999 |
| 5884174 | Call admission control for wireless networks Improved wireless telephone call admission methods for admitting new and/or handoff calls into a wireless telephone network having a plurality of communications channels. One such method, fractional guard channel call admission, effectively reserves a non... | 03/16/1999 |
| 5884173 | Mobile radio system with improved handover facility In modem, modularly structured mobile radio systems, a call between a base station and a mobile subscriber station is to be handed over to a different base station the moment the mobile subscriber station leaves the coverage area of a base station. For th... | 03/16/1999 |
| 5884177 | Cellular communication system and method providing improved handoff capability A cellular communication system and method providing improved handoff capability which reduces muting during handoffs. During handoffs, the system simultaneously monitors received signals from both the serving cellsite on a first channel and the target ce... | 03/16/1999 |
| 5884164 | Call handover in a non-geostationary satellite constellation Following a call set-up request transmitted by a terminal of a given user of a telecommunications system using a constellation of non-geostationary satellites, the terminal reserves a channel in the cell in which it is located and in neighboring cells not... | 03/16/1999 |
| 5884192 | Diversity combining for antennas An antenna configuration increases the sensitivity of a base station by providing a plurality of antennas each of which cover a disjunct or partially disjunct area of a larger cell. A receiver for each antenna receives signals transmitted from mobile stat... | 03/16/1999 |
| 5884178 | Method and apparatus for estimating speed of a mobile station in a cellular communications system A method and apparatus takes into account the Doppler shift of the information in a received burst, a frequency offset value is calculated for each received burst. For each burst, a signal quality value is calculated, which is compared with a predetermine... | 03/16/1999 |
| 5884175 | Handover following in a mobile radio system A method is provided of following a communication transaction during which a communicating mobile station (12) is handed-over from one radio cell to another in a mobile radio system. The transaction is followed across the handover by monitoring signaling ... | 03/16/1999 |
| 5878352 | Apparatus and method for selecting a transmitter for directed message delivery A method and the corresponding messaging system of selecting a transmitter for directed message delivery set is a messaging system including a plurality of transmitters arranged and constructed to operate in a simulcast or non-simulcast mode, the method i... | 03/02/1999 |
| 5873035 | Conducting handoff of a data transmission During a wireless communication of data in which modems (21, 24) are in use, a method of handing off the communication link (32) is described. The communication link (32) is handed off from a source base site (22) to a target base site (23). An interworki... | 02/16/1999 |
| 5870675 | Method for improving handover The invention is related to a method for improving handover in reception and transmission in a digital cellular mobile communication system including base stations and mobile stations, in which mobile station receives from a base station a handover comman... | 02/09/1999 |
| 5867784 | Call forwarding in a mobile communication system A digital cellular communication system supports call forwarding with better speech quality by avoiding unnecessary speech decoding when a call is forwarded from one network or exchange to another. A new information element that contains the network code ... | 02/02/1999 |
| 5867786 | System for monitoring carriers of peripheral zones A system for monitoring carriers of peripheral zones in a mobile telecommunication system, wherein when monitoring the carriers transmitted from the base stations in peripheral zones, the mobile units deem transmissions carriers to be true carriers receiv... | 02/02/1999 |
| 5867785 | Method for providing communication service to communication units located within a common carrier transportation device A communication system (100) employs a method and apparatus for providing communication service to communication units (207-213) located within a common carrier transportation device (115). A stationary system controller (101) allocates a first set of com... | 02/02/1999 |
| 5864759 | Radio telephones and methods of operation A method and apparatus for detecting additional base stations in a cellular radio telephone system in which communication channels are opened with a selected base station on a selected channel.... | 01/26/1999 |
| 5864578 | Matched filter-based handoff method and apparatus In a cellular spread-spectrum communications network, a system and method for handing off a remote unit from a first base station to a second base station without loss of data. The remote unit receives a first spread-spectrum signal having a first signal ... | 01/26/1999 |
| 5862489 | Power control method and arrangement for handover in a mobile communication system For providing power control for a mobile station in a mobile communication, in connection with accomplishing a handover of the mobile station from a presently serving cell to a target cell, each cell is assigned a maximum transmitting power level at which... | 01/19/1999 |
| 5862208 | Method and system for enabling a party to change terminals during a call A system and method for remote call control, including providing a tandem switch to control independent legs of a telephone conversation. The switch connects an organization's telecommunications system (Centrex or PBX), with cellular or wireless telephone... | 01/19/1999 |
| 5857153 | Cellular telecommunications network having seamless interoperability between exchanges while providing voice, asynchronous data and facsimile services in multiple frequency hyperbands A system and method of providing seamless interoperability for a mobile station roaming between cellular telecommunication systems operating in multiple hyperbands such as the 1900-MHz PCS hyperband and the 800-MHz cellular telephone hyperband, utilizing ... | 01/05/1999 |
| 5854981 | Adaptive neighbor cell list A method and apparatus for adaptively reconfiguring a neighbor cell list. For a selected cell of a cellular system, data associated with the selected cell and each of a plurality of neighboring base stations is collected. The collected data includes data ... | 12/29/1998 |
| 5852777 | Method and apparatus for screening a call in a wireless system A method and apparatus for screening a call in a telecommunications network having a first system comprising a first subscriber station and a second system comprising a second subscriber station, associated with the first subscriber station by a predeterm... | 12/22/1998 |
| 5850607 | Method and apparatus for providing control handoff in a cellular telecommunications system In a cellular telecommunications system having mobile exchanges, base stations and user mobile stations roaming in the system, the mobile exchanges are arranged to provide inter-exchange soft handoff with diversity combining. The mobile exchanges further ... | 12/15/1998 |
| 5850605 | Method and apparatus for dynamically grouping transmitters for message transmission in a communication system A communication system (100) for dynamically selecting transmitters (115) for message transmission includes the transmitters (115) for sending transmission signals and a portable messaging unit (105) for receiving the transmission signals, calculating sig... | 12/15/1998 |
| 5848063 | Method and apparatus for hard handoff in a CDMA system In a communications network, a network user communicates through a remote unit with another user via at least one base station. The communications network includes a first mobile switching center which controls communications through a first set of base s... | 12/08/1998 |
| 5845208 | Method for estimating received power and a receiver A receiver, and a method for estimating received power in a cellular radio system having in each cell at least one base station communicating with mobile stations within its coverage area. The mobile stations measure strength of the signal received from a... | 12/01/1998 |
| 5845192 | Wireless base station A wireless base station operating in a system in which wireless base stations are used to provide a link between a remote fixed part and a handset and method of operation of the same. The wireless base station prevents unnecessary handover initiation by t... | 12/01/1998 |
| 5844898 | Method of radio channel switching over in a mobile radio communications system A handover method for a mobile radio communications system, which reduces the disconnection time when the radio channel is switched from one radio base station to another radio base station. When the electric field received from a first radio base station... | 12/01/1998 |
| 5845211 | Wireless digital network A wireless Integrated Services Digital Network ("WISDN") is disclosed. The WISDN replaces conventional wireless networks with a plurality of network elements including intelligent cellsites ("ICSs"), a central site controller ("CSC"), a billing aggregator... | 12/01/1998 |
| 5842127 | Method for a mobile to register with one or more cell sites and method for paging the mobile A wireless communication system includes switching infrastructure (150) and at least one location area ("LA") having a multiplicity of cells (the "multiple-cell LA") (103). When a mobile (100) enters a cell belonging to the multiple-cell LA, the mobile is... | 11/24/1998 |
| 5839072 | Routing an incoming call to a ported mobile station within a telecommunications network A centralized database connected to the next to last Service Switching Point (SSP) within a Public Switched Telephone Network (PSTN) interfacing with a ported Public Land Mobile Network (PLMN) stores correlation data correlating a network address represen... | 11/17/1998 |
| 5832383 | Mobile communication method and system In a mobile communication method, when a terminating call to a mobile station is generated, one of subscriber lines which is connected to a local switch and assigned to the mobile station is captured. A mobile station identification number defined in corr... | 11/03/1998 |
| 5832363 | Mobile communication system including service management of traffic machines A mobile communication system including operation management of traffic machines, includes mobile radio terminals for receiving predetermined communication data, and which can be carried by a user of mobile communication; at least one traffic machine for ... | 11/03/1998 |
| 5826188 | Method and apparatus for handing off calls between differing radio telecommunication networks A method for handing off calls between differing radio telecommunication networks recognizes (302) a desire for an inter-network hand-off. When a Subscriber Unit (120) (SU) identifies (304) a new network, a hand-off with the new network can be requested (... | 10/20/1998 |
