Rate assignment circuitry (102) detects when a data transmission begins and originally assigns an Orthogonal Variable Spreading Factor (OVSF) code corresponding to low data rate. Over time, a base station controller (101) determines when an OVSF code and/or a repetition rate should be changed (i.e.,...http://www.google.com/patents/US6400755?utm_source=gb-gplus-sharePatent US6400755 - Data transmission within a spread-spectrum communication system
