System access method and apparatus of a narrowband terminal in a wireless communication system supporting wideband and narrowband terminals
Apparatuses (including base stations and terminals), systems, and methods for supporting both wideband and narrowband communications are described. In one aspect, a base station supporting first type terminals operating on a first bandwidth and second type terminals operating on a second bandwidth is described, having an information formatter, a transceiver, and a controller. The information formatter generates a Low-end Master Information Block (L-MIB) and a Low-end System Information Block (L-SIB), which are transmitted by the transceiver to first type and second type terminals. The L-MIB includes control information on an L-subframe configuration for supporting a second type terminal and a sub-band configuration of the L-subframe, while the L-SIB includes information on downlink reception and uplink transmission of the second type terminal. When the base station receives a Random Access Channel (RACH) preamble request from one of the terminals, the base station performs the random access procedure.
1. A base station in a wireless communication system supporting first type terminals operating on a first bandwidth and second type terminals operating on a second bandwidth, the base station comprising:
a transceiver configured to:
transmit a master information block (MIB) and a system information block (SIB), wherein the MIB includes control information on an subframe configuration for supporting a second type terminal and a sub-band configuration of the subframe, and wherein the SIB includes information on downlink reception and uplink transmission of the second type terminal, and
receive a Random Access Channel (RACH) preamble request from one of the first type terminals and the second type terminals; and
a controller configured to:
control the transceiver to transmit MIB and SIB and to receive the RACH preamble request from one of the first type terminals and the second type terminals, and
perform a random access procedure, when a RACH preamble request is received from one of the first type terminals and the second type terminals,
wherein the second bandwidth is narrower than the first bandwidth.
2. The base station of claim 1 , wherein the transceiver is further configured to broadcast the MIB on a physical broadcast channel (PBCH), and
wherein the MIB includes at least one of a subframe configuration index, physical hybrid automatic repeat request indicator channel (PHICH) resource information, downlink sub-band bandwidth configuration information, and a search space.
3. The base station of claim 1 , wherein the transceiver is further configured to transmit the SIB on a physical downlink shared channel (PDSCH) carrying data addressed to the second type terminal, and
wherein the SIB includes at least one of a downlink sub-band position, uplink sub-band bandwidth configuration information, uplink sub-band bandwidth configuration information, an uplink sub-band position, physical random access channel (PRACH) configuration information, and physical channel configuration information.
4. The base station of claim 1 , wherein the L-subframe carries control information for a first type terminal in first N symbols and control information for the second type terminal in symbols after the first N symbols.
5. The base station of claim 1 , wherein the transceiver is further configured to receive a sounding reference signal at a last symbol of a predetermined uplink subframe transmitted by the second type terminal.
6. A terminal in a wireless communication system supporting first type terminals operating on a first bandwidth and second type terminals operating on a second bandwidth, the terminal comprising:
a transceiver configured to receive a synchronization channel (SCH), a master information block (MIB), and a system information block (SIB), and to transmit a random access channel (RACH) preamble to the base station based on the received MIB and the received SIB, wherein the received MIB includes control information on an subframe configuration for supporting a second type terminal and a sub-band configuration of the subframe, and wherein the SIB includes information on downlink reception and uplink transmission of the second type terminal; and
a controller configured to control the transceiver to receive the SCH, the MIB, and the SIB, and to transmit the RACH preamble to the base station based on the received MIB and the received SIB,
wherein the second bandwidth is narrower than the first bandwidth.
7. The terminal of claim 6 , wherein the transceiver is further configured to receive the MIB on a physical broadcast channel (PBCH), and
wherein the MIB includes at least one of a subframe configuration index, physical hybrid automatic repeat request indicator channel (PHICH) resource information, downlink sub-band bandwidth configuration information, and a search space.
8. The terminal of claim 6 , wherein the transceiver is further configured to receive the SIB on a physical downlink shared channel (PDSCH) carrying data addressed to the second type terminal, and
wherein the SIB includes at least one of a downlink sub-band position, uplink sub-band bandwidth configuration information, uplink sub-band bandwidth configuration information, an uplink sub-band position, physical random access channel (PRACH) configuration information, and physical channel configuration information.
9. The terminal of claim 6 , wherein the L-subframe carries control information for a first type terminal in first N symbols and control information for the second type terminal in symbols after the first N symbols.
10. The terminal of claim 6 , wherein the transceiver is further configured to transmit a sounding reference signal at a last symbol of a predetermined uplink subframe transmitted by the second type terminal.