Method and apparatus for broadcasting position location data in a wireless communication system
US6895249B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2001 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Apr 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques to efficiently broadcast position location data (PLD) from a base station to a number of terminals. In one aspect, PLD messages are classified into groups, and each group is broadcast in a different manner. For example, a first group of messages for PLD related to the base station is broadcast in an unscheduled format, and a second group of messages for PLD related to GPS satellites is broadcast in a scheduled format. In another aspect, a schedule for the second group describes the specific PLD elements selected for broadcast, their broadcast order, and the specific time intervals of their broadcast. The schedule is valid for a particular scheduled time interval, and the scheduling table is broadcast multiple times during the scheduled time interval to allow the terminals to quickly retrieve the schedule and ascertain what PLD information is being broadcast and where to look for specific PLD elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.