Narumi Umeda
108Patents
24h-index
68Co-inventors
93Inventor score
Filing activity: Sep 18, 1990 → Feb 21, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5666655A | Mobile communication system with autonomous distributed type dynamic channel allocation scheme | Electricity | 114 | Expired |
| US5838671A | Method and apparatus for call admission control in CDMA mobile communication system | Electricity | 105 | Expired |
| US5673260A | Method and system for CDMA mobile communication | Electricity | 101 | Expired |
| US5566165A | Transmission power control method and a communication system using the same | Electricity | 99 | Expired |
| US5574983A | Base station device and mobile station device in mobile communication system utilizing the site diversity effect in soft handover state | Emerging Cross-Sectional Technologies | 89 | Expired |
| US5212822A | Method for registering mobile station in mobile communication system | Electricity | 72 | Expired |
| US5920817A | Mobile communication system with reliable handover scheme | Electricity | 72 | Expired |
| US5420850A | Mobile station and cell selecting method for code division multiplex access mobile communication | Electricity | 72 | Expired |
| US7292863B2 | Admission control method and device in mobile communication system | Electricity | 67 | Expired |
| US5230081A | Method and apparatus for locating which zone and sector of a mobile communication system a mobile station is in | Electricity | 62 | Expired |
| US5581547A | Random access communication method by CDMA and mobile station equipment using the same | Electricity | 56 | Expired |
| US5081704A | Method of arranging radio control channels in mobile communications | Electricity | 47 | Expired |
| US5568472A | Code division multiple access mobile communication system | Electricity | 44 | Expired |
| US7359349B2 | Base station, radio resource control equipment, mobile station, communication system, and communication method | Electricity | 44 | Expired |
| US5361396A | Location registration system in mobile communication | Electricity | 43 | Expired |
| US5873028A | Transmission power control apparatus and method in a mobile communication system | Electricity | 41 | Expired |
| US7443816B2 | Packet transmission method, base station and mobile station | Electricity | 39 | Expired |
| US7142847B2 | Mobile communication system, resource switching method thereof, network control apparatus included therein, same and network control method | Electricity | 37 | Expired |
| US5210751A | Signal transmission system capable of performing re-transmission control in units of slots | Electricity | 33 | Expired |
| US7130638B2 | Radio resource allocation method and base station using the same | Electricity | 30 | Expired |
| US5873047A | Method for setting up perch channels in mobile communication by cellular system | Electricity | 28 | Expired |
| US7821982B2 | Packet communications taking into account channel quality and buffered data amount | Electricity | 28 | Active |
| US6871071B2 | Handover control method and system | Electricity | 25 | Expired |
| US7116983B2 | Method, base station and mobile station for timeslot selection and timeslot assignment | Electricity | 25 | Expired |
| US6895216B2 | Rendering multicast service with sufficient reception quality to wireless terminals | Emerging Cross-Sectional Technologies | 24 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.