Method and apparatus for efficient handoffs by mobile communication entities
US5594943A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1996 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Apr 2, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus used in the context of a digital cellular communication network for allowing a remote unit to determine the conditions under which a handoff should occur and the procedure to be followed. The method and apparatus of the present invention controls handoffs in a manner which causes the boundaries of a cell within a digital cellular network to remain relatively well defined and to very closely conform to the boundaries of a cell of an advanced mobile phone system with which the cellular digital packet data system is associated. The present invention also reduces the effort required by a remote unit within a cellular digital packet data communication system when attempting to change channels. Primary and Secondary Thresholds are defined in accordance with the present invention. These Thresholds aid in determining when a link should be handed off (and thus define the boundaries of cells of the system) and which channels are appropriate candidates to attempt to scan to track a hop or determine when to initiate a handoff. The Thresholds represent performance thresholds which can be used to determine whether the airlink can reliably transmit information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.