Apparatus and method for transmitting signal in wireless communication system
An apparatus and a method for transmitting control information in a small base station of a wireless communication system are provided. In the method, when the small base station operates in a Low Duty operation Mode (LDM) in a superframe, a control signal including LDM operation information is generated. Only a subframe via which a preamble, a control signal including the LDM operation information, and a SuperFrame Header (SFH) are transmitted is transmitted during the superframe. When the small base station operates in a normal operation mode in a superframe, at least one of the control information and data is transmitted via at least one subframe of the superframe.
1. A method for operating a base station of a small cell in a wireless communication system, the method comprising:
transmitting, if the base station operates in a first mode, to at least one terminal, a control signal including a parameter indicating time information to return to a second mode via a first subframe among a plurality of subframes;
transmitting, if the base station operates in the second mode, to the at least one terminal, data via the plurality of subframes;
determining to operate in the first mode if a terminal that accesses the small cell does not exist; and
generating, if the small cell operates in the first mode, the control signal,
wherein the first subframe includes a first preamble and a super frame header (SFH).
2. The method of claim 1 , further comprising:
determining to operate in the first mode if the at least one terminal that accesses the small cell operates in one of an idle mode and a sleep mode; and
generating, if the small cell operates in the first mode, the control signal.
3. The method of claim 1 , further comprising:
generating the control signal comprising an SFH Information Element (IE) including the parameter.
4. The method of claim 1 , further comprising:
generating the control signal comprising a basic control channel MAP including the parameter.
5. The method of claim 4 , wherein the basic control channel MAP includes a Non User Specific (NUS) Advanced-MAP (A-MAP) IE.
6. The method of claim 4 , wherein the first subframe includes the basic control channel MAP.
7. The method of claim 1 , further comprising:
generating the control signal comprising a MAP including the parameter via a type field of an Information Element (IE).
8. The method of claim 7 , wherein the MAP comprises information identifying a point at which the first mode operating in the first mode switches to the second mode.
9. The method of claim 1 , further comprising:
transmitting the control signal including at least one of a preamble, the SFH, and control and resource allocation information via the plurality of subframes if the base station operates in the second mode.
10. An apparatus for a base station of a small cell in a wireless communication system, the apparatus comprising:
at least one processor configured to
determine an operation mode of the small cell, and
determine to operate in a first mode if a terminal that accesses the small cell does not exist; and
at least one transceiver configured to:
transmit, if the base station operates in the first mode, to at least one terminal, a control signal including a parameter indicating time information to return to a second mode via a first subframe among a plurality of subframes, and
transmit, if the base station operates in the second mode, to the at least one terminal, data via the plurality of subframes,
wherein the first subframe includes a first preamble and a super frame header (SFH).
11. The apparatus of claim 10 , wherein the at least one processor is further configured to determine to operate in the first mode if the at least one terminal that accesses the small cell operates in one of an idle mode and a sleep mode.
12. The apparatus of claim 10 , further comprising:
a generator configured to generate an SFH Information Element (IE) comprising the parameter if the base station operates in the first mode.
13. The apparatus of claim 10 , further comprising:
a generator configured to generate a basic control channel MAP comprising the parameter if the base station operates in the first mode.
14. The apparatus of claim 13 , wherein the basic control channel MAP includes a Non User Specific (NUS) Advanced-MAP (A-MAP) IE.
15. The apparatus of claim 13 , wherein the first subframe includes the basic control channel MAP.
16. The apparatus of claim 10 , further comprising:
a generator configured to generate the control signal comprising a MAP including the parameter through a type field of an IE.
17. The apparatus of claim 16 , wherein the MAP further includes information identifying a point at which the base station operating in the first mode switches to a second mode.
18. The apparatus of claim 10 , wherein the at least one transceiver is further configured to transmit the control signal including at least one of a preamble, the SFH, and control and resource allocation information via the plurality of subframes if the base station operates in the second mode.