US Patent No: 6,539,004
Number of patents in Portfolio can not be more than 2000
Time synchronization of packetized radio signals to base stations
Stats
-
Mar 25, 2003
Issued date -
Sep 17, 1998
filing date -
09/154,885
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
Methods and apparatus for transmitting packets from a source of such packets to one or more radio station sites so that the radio station sites can transmit the packets at the correct real time. Each radio site has an independent source of exact time based on the reception of signals derived from satellite inputs. Using the real time calculated by a base station, the base station calculates an offset between the time of arrival of a signal with a specified time marker, and the time that a signal with that specified time marker should have arrived in order to be transmitted in a timely fashion. The offset is sent back to the source of packets, and used by the source of packets to advance, or retard, the transmission of future packets. Advantageously, packets can be transmitted from each base station at the correct time, and if packets are being transmitted for a given call from several base stations, can be transmitted simultaneously, by these base stations.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 5,586,119 Method and apparatus for packet alignment in a communication system | 46 | 1994 | |
| 6,101,175 Method and apparatus for handoff within a communication system | 39 | 1997 | |
| 6,208,871 Method and apparatus for providing a time adjustment to a wireless communication system | 95 | 1998 | |
| 6,205,125 Method and system for determining an estimate of a transmission time of a packet | 15 | 1998 | |
|
|
|||
| 6,253,085 Forward power gain adjustment during a soft handoff operation | 14 | 1999 | |
| 6,246,673 Method and system for handoff between an asynchronous CDMA base station and a synchronous CDMA base station | 96 | 2000 | |
|
|
|||
| 5,184,347 Adaptive synchronization arrangement | 139 | 1991 | |
|
|
|||
| 5,268,933 Data packet alignment in a communication system | 104 | 1991 | |
|
|
|||
| 5,828,659 Time alignment of transmission in a down-link of CDMA system | 149 | 1996 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 25, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |