Enhanced physical downlink control channel scrambling and demodulation reference signal sequence generation

1. An apparatus to be employed in an enhance node B (eNB), the apparatus comprising:

scrambling circuitry to receive a bit sequence that includes downlink control information (DCI) to be transmitted on an enhanced physical downlink control channel (EPDCCH) and to scramble the bit sequence based on a cell identifier to provide a scrambled bit sequence; and

modulating circuitry coupled with the scrambling circuitry to receive the scrambled bits and to modulate the scrambled bits, with a quadrature phase shift keying modulation scheme, to provide a block of complex-valued modulation symbols,

wherein the cell identifier is a virtual cell identifier;

the DCI is to be transmitted in a first EPDCCH set;

the virtual cell identifier corresponds to the first EPDDCH set; and

the scrambling circuitry is to scramble the DCI bits based on a scrambling initialization seed c int given by

c int =└n s /2┘*2 9 +N ID ePDCCH

where n s is a slot number within a radio frame and N ID ePDCCH is the virtual cell identifier.

2. The apparatus of claim 1 , wherein the cell identifier is a provided to the scrambling circuitry by a radio resource control layer.

3. The apparatus of claim 2 , further comprising:

a reference signal (RS) generator to generate demodulation reference signals associated with the EPDCCH based on the virtual cell identifier.

4. The apparatus of claim 1 , further comprising:

cyclic redundancy check (CRC) generating and masking circuitry to generate a bit sequence that includes DCI and CRC bits and to mask the bit sequence based on a radio network temporary identity (RNTI) of a user equipment that is an intended recipient of the DCI.

5. The apparatus of claim 1 , wherein the cell identifier is configured by radio resource control (RRC) signaling.

6. The apparatus of claim 1 , wherein the apparatus is a mobile device that includes a touchscreen display and one or more cameras.