Method and apparatus for searching control information by terminal in multi-node system

A method for searching control information by a terminal, the method comprising:

• acquiring, by the terminal from a base station, location information of an evolved-physical control formation indication channel (E-PCFICH) or location information of an evolved-control (E-control) region,
• wherein the location information of the E-PCFICH or E-control region is acquired by a physical downlink control channel (PDCCH) or a higher layer message;
• receiving, by the terminal, the E-PCFICH based on the location information of the E-PCFICH;
• acquiring, by the terminal, size information of the E-control region based on the E-PCFICH;
• and
• searching, by the terminal, an evolved-physical downlink control channel (E-PDCCH) in the E-control region,
• wherein the PDCCH is a control channel through which the base station transports control information and is transported in first N (N is one of natural numbers of 1 to 4) orthogonal frequency division multiplexing (OFDM) symbols,
• wherein the E-PDCCH is a control channel through which the base station transports the control information and is positioned in at least one OFDM symbol positioned subsequent to the PDCCH,
• wherein the E-control region is a radio resource region including at least one of the E-PDCCH and the E-PCFICH, the E-PCFICH is received based on the location information, the location information received through the PDCCH is used to acquire the size information of the E-control region, and the E-control region is determined based on the location information of the E-control region and the size information of the E-control region,
• wherein the size information of the E-control region indicates a size of the E-control region in a time domain and a frequency domain,
• wherein the location information of the E-control region and the size information of the E-control region are joint-encoded,
• wherein the location information of the E-PCFICH and the location information of the E-control region are associated with node information received from the base station,
• wherein the node information includes at least one of a node index, a reference signal port number, a reference signal configuration number, and a reference signal subframe configuration number,
• wherein the E-control region is a remote radio head (RRH) control region, and
• wherein the E-PCFICH is positioned outside a resource region in which a first OFDM symbol of a subframe transporting a physical control formation indication channel (PCFICH) to acquire the size information of the PDCCH is allocated.