METHOD AND APPARATUS FOR IMPLEMENTING NEW CARRIER TYPE (NCT) IN A WIRELESS COMMUNICATION SYSTEM

1 . A method for implementing New Carrier Type (NCT), comprising:

including a PDCCH (Physical Downlink Control Channel) for a standalone NCT located in part of DL (Downlink) bandwidth, wherein bandwidth for the PDCCH is indicated in a MIB (Master Information Block) field.

2 . The method of claim 1 , wherein the MIB field is dl-Bandwidth.

3 . The method of claim 1 , wherein the DL bandwidth configuration of the standalone NCT and/or the Enhanced Physical Downlink Control Channel (EPDCCH) Common Search Space (CSS) are included in a SIB (System Information Block).

4 . The method of claim 1 , further comprises:

demodulating the PDCCH using the reduced CRS within the indicated bandwith for the PDCCH, wherein a reduced CRS (Cell-specific Reference Signal) is transmitted in subframes 0 and 5.

5 . The method of claim 1 , wherein the PDCCH region exists only subframes 0 and 5.

6 . The method of claim 1 , wherein a resource-mapping of PCFICH (Physical Control Format Indicator Channel) is derived by the bandwidth of the PDCCH region instead of the DL bandwidth configuration of the standalone NCT.

7 . The method of claim 1 , wherein a number of PHICH (Physical Hybrid ARQ Indicator Channel) groups is derived by the bandwidth of the PDCCH region instead of the DL bandwidth configuration of the standalone NCT, and the PHICH transmission is within the bandwidth of the PDCCH region.

8 . A method for implementing New Carrier Type (NCT), comprising:

decoding the transmitted scrambled sequence of bits to derive a cell type information.

9 . The method of claim 8 , wherein the scrambled sequence of bits transmitted on a PBCH for a standalone NCT is different than a scrambled sequence of bits transmitted on a PBCH for a backward-compatible carrier

10 . The method of claim 8 , wherein the scrambled sequence of bits for the standalone NCT could be initialized with a physical layer cell identity and/or another specified value/parameter.

11 . The method of claim 8 , wherein the scrambled sequence of bits for the standalone NCT is decoded and derived from performing a left or right bit shift of the scrambled sequence for the backward-compatible carrier.

12 . The method of claim 8 , wherein the scrambled sequence of bits for the standalone NCT is the inverse sequence of the scrambled sequence for the backward-compatible carrier.

13 . The method of claim 8 , further comprising:

demodulating the PBCH using a reduced CRS (Cell-specific Reference Signal).

14 . A method for implementing New Carrier Type (NCT), comprising:

detecting a physical layer cell identity based on the defined mapping between N ID (1) and the indices (m 1 ,m 0 ), wherein the mapping is defined such that for a given physical layer identity group the mapping for a standalone NCT would be different than a mapping for backward-compatible carrier; and

determining a cell type information based on the mapping between N ID (1) and the indices (m 1 ,m 0 ).

15 . The method of claim 14 , wherein for a given physical layer cell identity group N ID (1) the standalone NCT and the legacy backward-compatible carrier are mapped to different value regions of the indices (m 1 ,m 0 ).

16 . The method of claim 14 , wherein the mapping between N ID (1) and the indices (m 1 ,m 0 ) of secondary synchronization signal (SSS) for the standalone NCT is specified.

17 . The method of claim 14 , wherein the PBCH is demodulated by a reduced CRS (Cell-specific Reference Signal), and/or by a DM-RS (Demodulation Reference Signal).

18 . The method of claim 14 , wherein information about the EPDCCH CSS is included in a MIB (Master Information Block) of the standalone NCT.

19 . The method of claim 14 , wherein phich-Config is used to deliver the information about the EPDCCH CSS.

20 . The method of claim 14 , further comprises:

if the cell type of information indicates that the camped cell is a standalone NCT, demodulating a PBCH and monitor EPDCCH (Enhanced Physical Downlink Control Channel) CSS (Common Search Space) to acquire system information afterward.