Method for transmitting sub-frame designation information to a downlink in a radio communication system

A base station for transmitting subframe designating information, the base station comprising:

• a RF (Radio Frequency) unit;
• and
• a processing unit, electrically connected to the RF unit, cause the RF unit to transmit system information,
• wherein the system information includes the subframe designating information, a period value of the subframe designating information and an offset value associated with a start position at which the subframe designating information is applied,
• wherein the subframe designating information has 6 bits for one radio frame or 24 bits for four radio frames,
• wherein a radio frame includes 10 subframes,
• wherein the 6 bits are respectively corresponding to 6 subframes of the one radio frame, and the 24 bits are respectively corresponding to 24 subframes which include 6 subframes of each of the four radio frames,
• wherein each bit of the 6 or 24 bits indicates whether or not a corresponding subframe is a specific type subframe, and
• wherein the specific type subframe is an MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe, a relay node subframe or a Channel State Information—Reference Signal (CSI-RS) subframe.

A method of receiving, by a user equipment, subframe designating information, the method comprising:

• receiving system information including the subframe designating information, a period value of the subframe designating information and an offset value associated with a start position at which the subframe designating information is applied,
• wherein the subframe designating information has a 6 bits for one radio frame or 24 bits for four radio frames,
• wherein a radio frame includes 10 subframes,
• wherein the 6 bits are respectively corresponding to 6 subframes of the one radio frame, and the 24 bits are respectively corresponding to 24 subframes which include 6 subframes of each of the four radio frames,
• wherein each bit of the 6 or 24 bits indicates whether or not a corresponding subframe is a specific type subframe, and
• wherein the specific type subframe is an MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe, a relay node subframe or a Channel State Information—Reference Signal (CSI-RS) subframe.

A user equipment for receiving subframe designating information, the user equipment comprising:

• a RF (radio Frequency) unit;
• and
• a processing unit, electrically connected to the RF unit, cause the RF unit to receive system information,
• wherein the system information includes the subframe designating information, a period value of the subframe designating information and an offset value associated with a start position at which the subframe designating information is applied,
• wherein the subframe designating information has 6 bits for one radio frame or 24 bits for four radio frames,
• wherein a radio frame includes 10 subframes,
• wherein the 6 bits are respectively corresponding to 6 subframes of the one radio frame, and the 24 bits are respectively corresponding to 24 subframes which include 6 subframes of each of the four radio frames,
• wherein each bit of the 6 or 24 bits indicates whether or not a corresponding subframe is a specific type subframe, and
• wherein the specific type subframe is an MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe, a relay node subframe or a Channel State Information—Reference Signal (CSI-RS) subframe.