on of 64QAM and MIMO for HSDPA (FDD mode) allows for further increased user throughput in favorable radio conditions such as in well tuned outdoor systems or indoor system solutions (cells with isolation). 15 code reception with 16QAM/QPSK: Rel-8 introduces performance requirements for QPSK and 16QAM with 15 codes for the HSDPA UE categories 9, 10, 13, 14, and 20 that use 15 codes to achieve higher data rates. Interference Cancellation: Rel-8 introduces two-branch interference cancellation receivers for HS- HSPA VoIP to WCDMA/GSM CS continuity: Rel-8 enhances RAN to allow UTRA-VOIP to WCDMA/GSM CS continuity within the SR-VCC (single radio voice call continuity) framework. Dual-Cell HSDPA operation on adjacent carriers: Dual-Cell HSDPA operation is specified in Rel-8 to enhance user experience and enhance user experience consistency. GERAN Enhancements: LTE Interworking: Requirements are provided to entertain GERAN and LTE interworking. New multicarrier BTS class: Multicarrier transceiver architectures can be applied to GSM BTSs that will allow several GSM carriers to be processed by a single transmitter and power amplifier in the downlink and by a single wideband receiver in the uplink. This sharing of hardware resources by several carriers can lead to cost reductions for the BTS equipment. 3.3.2 Key Aspects of Release 9 Unlike the previous releases, no new radio access technology has been introduced in Release 9; rather enhancements have been proposed for the different components of the network. The current working view for Rel-9 in 3GPP targets the freezing of the service description (i.e., stage 1) by December 2008, the freezing of the logical analysis (i.e., stage 2) by June 2009 in order to complete the Rel-9 specification (stage 3 freezing) by December 2009. It is recognized that this is an aggressive timeline for Rel-9 and therefore prioritization of content will be required. A full list of Rel-9 features is available at [8]: LTE Enhancements: Enhancements have been proposed for Home NodeB and Home eNodeB