Method for configuring subchannels in wireless communication system and apparatus therefor
A method for configuring subchannels for an uplink data transmission at a base station in a wireless communication system is disclosed herein. More specifically, the method includes the steps of dividing an uplink transmission resource to PUSC (Partial Usage of SubChannel) tiles of 4 subcarriers×3 symbols, configuring subchannels to 6 PUSC tiles based on a predetermined rule; allocating a predetermined number of contiguous subchannels among the configured subchannels as subchannels for a legacy system, and allocating the remaining subchannels as subchannels for the wireless communication system, wherein a subchannel rotation per slot consisting of 3 symbols is applied to the subchannels for the legacy system, and wherein the subchannel rotation per slot is based on a number of subchannels for the legacy system.
1. A method for configuring subchannels for an uplink data transmission at a base station in a wireless communication system, the method comprising;
dividing an uplink transmission resource to PUSC (Partial Usage of SubChannel) tiles of 4 subcarriers×3 symbols;
configuring sub channels to 6 PUSC tiles based on a predetermined rule;
allocating a predetermined number of contiguous subchannels among the configured subchannels as subchannels for a legacy system, and
allocating the remaining subchannels as subchannels for the wireless communication system,
wherein subchannel rotation per slot consisting of 3 symbols is applied to the subchannels for the legacy system,
wherein a subchannel rotation per subframe consisting of 6 symbols or 9 symbols is applied to the subchannels for the wireless communication system,
wherein the subchannel rotation per slot is performed in accordance with Equation 1,
temp2_subchannel_number=(temp1_subchannel_number+13 *S idx )mod N subchannel for 16e MS , <Equation 1>
wherein, temp 2 _subchannel represents a subchannel index after the subchannel rotation is applied, temp 1 _subchannel represents a subchannel index before the subchannel rotation is applied, S idx represents a slot index, and N subchannel for 16e MS represents a number of subchannels for the legacy system,
wherein the subchannel rotation per subframe is performed in accordance with Equation 2,
temp2_subchannel_number=(temp1_subchannel_number+13 *S k )mod N subchannel for 16m AMS , and <Equation 2>
wherein, temp 2 _subchannel represents a subchannel index after the subchannel rotation is applied, temp 1 _subchannel represents a subchannel index before the subchannel rotation is applied, S k represents a subframe index, and N subchannel for 16m AMS represents a number of subchannels for the wireless communication system.
2. The method of claim, 1 , wherein the number of subchannels for the legacy system is signaled to a legacy user equipment through a UCD (Uplink Channel Descriptor) message.
3. The method of claim 1 , wherein the subchannels for the wireless communication system are signaled as zones to which the subchannel rotation per slot is not applied, to o legacy user equipment through a UIUC (uplink interval usage code) included in an uplink MAP.
4. The method of claim 1 , wherein, whether the subchannel rotation per subframe is applied is signaled to a user equipment for wireless communication through a MAC (Media Access Control) message or indicated to the user equipment in a Secondary Superframe Heather (S-SFH).
5. A base station comprising:
a processor configured to allocated a resource for m uplink data transmission;
a transmitting module configured to transmit information on the allocated resource to a user equipment; and
a receiving module configured to receive the uplink data from the user equipment through the allocated resource,
wherein the processor is further configured to:
divide an uplink transmission resource to PUSC (Partial Usage of SubChannel) tiles of 4 subcarriers×3 symbols, configure subchannels to 6 PUSC tile based on a predetermined rule, allocate a predetermined number of contiguous subcbannels among the configured subchannels as subchannels for a legacy system, and allocate the remaining subchannels as subchannels for the wireless communication system,
wherein a subchannel rotation per slot consisting of 3 symbols is applied to the subchannels for the legacy system,
wherein a subchannel rotation per subframe consisting, of 6 symbols or 9 symbols is applied to the subchannels for the wireless communication system,
wherein the subchannel rotation per slot is performed in accordance with Equation 1,
temp2_subchannel_number=(temp1_subchannel_number+13 *S idx )mod N subchannel for 16e MS , <Equation 1>
wherein, temp 2 _subchannel represents a subchannel index after the subchannel rotation is applied temp 1 _subchannel represents a subchannel index before the subchannel rotation is applied, S idx represents a slot index, and N subchannel for 16e MS represents a number of subchannels for the legacy system,
wherein the subchannel rotation per subframe is performed in accordance with Equation 2,
temp2_subchannel_number=(temp1_subchannel_number+13 *S k )mod N subchannel for 16m AMS , and <Equation 2>
wherein, temp 2 _subchannel represents a subchannel index after the subchannel rotation is applied, temp 1 _subchannel represents a subchannel index before the subchannel rotation is applied, S k represents a subframe index, and N subchannelfor 16m AMS represents a number of subchannels for the wireless communication system.
6. The base station of claim 5 , wherein the number of subchannels for the legacy system is signaled to a legacy user equipment through a UCD (Uplink Channel Descriptor) message.
7. The base station of claim 5 , wherein the subchannels for the wireless communication system are signaled as zones, or areas, to which the subchannel rotation per slot is not applied, to a legacy user equipment through a UIUC (uplink interval usage code) included in an uplink MAP.