Nova Patents
WO2004046893A3

Soft handoff of a cdma reverse link

Abstract

Method and apparatus for base stations (218) and subscriber units (213) allows soft handoff of a CDMA reverse link utilizing an orthogonal channel structure. Subscriber units transmit an orthogonally coded signal over a reverse link to the base stations. A given base station provides timing control (510) of the timing offset of the reverse link signal. Based on at least one criterion, an alignment controller (515) determines that the given base station should hand off timing control to another base station, and a soft handoff process ensues. In response to a command or message for soft handoff of the subscriber unit from the given base station to another base station, the subscriber unit makes a coarse timing adjustment to the timing of the coded signal. The subscriber unit may make fine timing adjustments based on feedback from the base station controlling timing. Multiple base stations may provide power control feedback to the subscriber unit.

Term

No projected expiry on record.

  1. Priority
  2. Filed
  3. Published
  4. Today

Every citation, both ways

Citations
DocumentRelationOfficeCategoryCited during
US2002071384A1CitesUnited States of AmericaXInternational search
US5101501ACitesUnited States of AmericaAInternational search
US5937019ACitesUnited States of AmericaYInternational search
US6470001B1CitesUnited States of AmericaYInternational search