Method and apparatus for using smaller bandwidth for low cost user equipment in wireless communication system
A method and apparatus for allocating resources to a low cost user equipment (UE) in a wireless communication system is provided. A base station (BS) allocates at least one sub-bandwidth among a system bandwidth to a low cost UE, and transmits information on the allocated at least one sub-bandwidth to the low cost UE. The at least one sub-bandwidth may include a set of resource physical resource blocks (PRBs) that the low cost UE can access at a given subframe.
1. A method performed by a base station (BS) in a wireless communication system, the method comprising:
partitioning a system bandwidth into a plurality of subbands;
configuring at least one subband among the plurality of subbands; and
communicating with a user equipment (UE) via the configured at least one subband,
wherein each subband among the plurality of subbands includes 6 consecutive physical resource blocks (PRBs) in a frequency domain, and
wherein a boundary of a PRB in each subband is aligned with a boundary of a PRB in the system bandwidth.
2. The method of claim 1 , wherein the at least one subband is located at center of the system bandwidth.
3. The method of claim 1 , wherein the at least one subband is determined based on a start offset and a number of available subbands.
4. The method of claim 1 , wherein the at least one subband is allocated from a lowest indexed PRBs or from a highest indexed PRBs among available subbands.
5. The method of claim 1 , wherein the at least one subband is allocated from PRBs in edge of the system bandwidth.
6. The method of claim 1 , wherein the at least one subband is overlapped with a center subband.
7. The method of claim 1 , further comprising transmitting a synchronization signal via the at least one subband to the UE.
8. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
configuring at least one subband among a plurality of subbands, wherein a system bandwidth is partitioned into the plurality of subbands; and
communicating with a base station (BS) via the configured at least one subband,
wherein each subband among the plurality of subbands includes 6 consecutive physical resource blocks (PRBs) in a frequency domain, and
wherein a boundary of a PRB in each subband is aligned with a boundary of a PRB in the system bandwidth.
9. The method of claim 8 , wherein the at least one subband is located at center of the system bandwidth.
10. The method of claim 8 , wherein the at least one subband is determined based on a start offset and a number of available subbands.
11. The method of claim 8 , wherein the at least one subband is allocated from a lowest indexed PRBs or from a highest indexed PRBs among available subbands.
12. The method of claim 8 , wherein the at least one subband is allocated from PRBs in edge of the system bandwidth.
13. The method of claim 8 , wherein the at least one subband is overlapped with a center subband.
14. The method of claim 8 , further comprising receiving a synchronization signal via the at least one subband from the BS.
15. A user equipment (UE) in a wireless communication system, the UE comprising:
a memory;
a transceiver; and
a processor, operably coupled to the memory and the transceiver, that:
configures at least one subband among a plurality of subbands, wherein a system bandwidth is partitioned into the plurality of subbands, and
controls the transceiver to communicate with a base station (BS) via the configured at least one subband,
wherein each subband among the plurality of subbands includes 6 consecutive physical resource blocks (PRBs) in a frequency domain, and
wherein a boundary of a PRB in each subband is aligned with a boundary of a PRB in the system bandwidth.
16. The UE of claim 15 , wherein the at least one subband is located at center of the system bandwidth.
17. The UE of claim 15 , wherein the at least one subband is determined based on a start offset and a number of available subbands.
18. The UE of claim 15 , wherein the at least one subband is allocated from a lowest indexed PRBs or from a highest indexed PRBs among available subbands.
19. The UE of claim 15 , wherein the at least one subband is allocated from PRBs in edge of the system bandwidth.
20. The UE of claim 15 , wherein the at least one subband is overlapped with a center subband.