A New Approach for Scrambling and Spreading Code Reuse in WCDMA Networks

In this letter, we propose a novel approach for addressing both inter-cell interference and handover failure issues in dense WCDMA small cell deployments. This is achieved through an innovative scrambling allocation approach and an efficient spreading code allocation scheme that allow appropriate spatial reuse of resources. The proposed enhancements can be implemented in a centralised or distributed manner, and they are standard compliant. Simulation results show that the proposed approach can significantly mitigate inter-cell interference in both data and control channels, and thus result in enhanced network and user capacity as well as mobility management in dense small cell clusters.