Nonblocking ovsf codes for 3g wireless and beyond systems

摘要

Methods and apparatus are described for transmitting data using a wideband code division multiple access (WCDMA) transmission scheme that utilizes OVSF codes that are assigned in ways that do not result in underutilization of the network due to code blocking. One embodiment of the invention includes a WCDMA transmitter configured to spread data using an orthogonal variable spreading factor (OVSF) code and to periodically transmit the spread data for a predetermined time until all of the data has been transmitted. In some cases, the amount of time in each period that is assigned for transmission of the spread data is determined based on the quality of service requirements of the data.