High density cellular mobile radio communications
US4475010A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1983 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | May 5, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/00835
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a cellular mobile telecommunication system, a method and apparatus for controlling the process of locating a mobile unit from the cell sites. When a mobile unit goes beyond the radio range of its associated controlling cell site, that cell site sends a message to nearby cell sites to measure and report the strength of the received signal from that mobile on each of their directional antennas and to report radio channel availability. These reports are returned to the controlling cell site which compares the received signal strength mesurements against stored thresholds. The controlling cell site generates and transmits to the mobile telecommunications switching office (MTSO) a hand-off request message including a list of candidate hand-off cell sites and directional antennas. The MTSO then selects an available channel associated with one of the candidate cell sites and antennas and generates a sequence of messages to hand-off communications control from the controlling cell site to a candidate cell site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.