Multi-mode radio telephone which executes handover between different system
US5737703A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Oct 16, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/105
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radio telephone automatically hands over a call from one radio telephone system to another radio telephone system. Communication with respective radio telephone systems may be simultaneously continued during handover until the handover is complete, or communication with one radio telephone system ceases before communication with the other radio telephone system commences. Delays between signals of different radio telephone systems which would cause audible interference are inhibited by FIR filtering and/or dynamic time-warping. If an handover fails then communication with the original radio telephone system is restarted or continued.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.