Optimizing Code Utilization Regarding A Secondary Scrambling Code

An arrangement for optimizing code utilization in a code division multiple access (CDMA) communication network, said network comprising a first communication network entity, and a second communication network entity connected to said first communication network entity over a communication interface wherein a one or more user equipments can transmit data using a scrambling code to said second communication network entity over a radio interface on an uplink channel, wherein the arrangement comprises:

• means for identifying in what type of radio environment said one or more user equipments are, comprising means for estimating an orthogonality factor and at least one of the following:
• means for using Root-Mean-Square delay spread, means for using coherence bandwidth or means for using downlink transmit power variance in order to identify the type of radio environment;
• means for measuring traffic activity over the radio interface arranged to by measuring at least two of the following:
• average transmission slot utilization, fraction of used transmission slots, or average transmitted code power;
• and,
• means for determining when and how to use a secondary scrambling code based on the type of radio environment and traffic activity.