Low back haul reactivation delay for high-speed packet data services in CDMA systems
US6757270B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/54
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A back haul architecture effectively reduces the reactivation times for both forward-link and reverse-link data transmissions over CDMA wireless communications systems, by relying on packet-mode transmissions over the back haul between a frame selection/distribution (FSD) function and the appropriate base stations. In particular, for the forward direction, the FSD function transmits forward-link data only to one base station, which is solely responsible for controlling the forward-link air interface with the corresponding mobile unit. For the reverse direction, each base station that receives frames of reverse-link data from the mobile unit, assigns a time tag to the frame, divides the frame into one or more data packets, assigns a different sequence number to each data packet, and transmits the data packets to the FSD function over the back haul, all without first synchronizing time with any other base station that is also operating in reverse-link soft hand-off with that mobile unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.