Method of transmitting scheduling request in a wireless communication system
A method and apparatus for requesting uplink resources in a wireless communication system is provided. A user equipment determines whether a scheduling request for requesting uplink resources is triggered. If the scheduling request is triggered, the user equipment transmits a first set of frequency domain sequences and a second set of frequency domain sequences in a subframe.
1. A method for transmitting a scheduling request with additional information by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, by the UE from a base station (BS), radio resource allocation information that identifies an outermost frequency domain and within the same time domain portion of a control region of an uplink channel to be utilized for transmission of the scheduling request; and
transmitting, by the UE to the BS, the scheduling request with the additional information via the identified outermost frequency domain portion of the control region of the uplink channel received in the radio resource allocation information,
wherein the scheduling request with the additional information is modulated by a binary phase shift keying (BPSK) or a quadrature phase shift keying (QPSK).
2. The method of claim 1 , wherein the scheduling request with the additional information is carried in 1-bit, when the scheduling request with the additional information is modulated by the BPSK.
3. The method of claim 1 , wherein the scheduling request with the additional information is carried in 2-bit, when the scheduling request with the additional information is modulated by the QPSK.
4. The method of claim 1 , further comprising receiving, by the UE from the BS, an uplink (UL) radio resource which is allocated by the BS based on the scheduling request.
5. The method of claim 4 , further comprising transmitting, by the UE to the BS, UL data via the UL radio resource.
6. The method of claim 1 , wherein the scheduling request is transmitted via the uplink channel only when the UE needs an uplink (UL) radio resource.
7. A method for allocating an uplink (UL) radio resource by a base station (BS) in a wireless communication system, the method comprising:
transmitting, by the BS to a user equipment (UE), radio resource allocation information for configuring an uplink channel for transmission of a scheduling request in at least one single carrier-frequency division multiple access symbol, wherein the radio resource allocation information identifies a frequency domain portion of a control region of the uplink channel to be utilized for transmission of the scheduling request, wherein the control region uses a different frequency band than a data region, and wherein the control region is used to only transmit a control signal and the data region is used to only transmit user data;
receiving, by the BS from the UE, the scheduling request with additional information via the identified frequency domain portion of the control region received in the radio resource allocation information; and
allocating, by the BS to the UE, the UL radio resource based on the scheduling request,
wherein the scheduling request with the additional information is modulated by a binary phase shift keying (BPSK) or a quadrature phase shift keying (QPSK).
8. The method of claim 7 , wherein the scheduling request with the additional information is carried in 1-bit, when the scheduling request with the additional information is modulated by the BPSK.
9. The method of claim 7 , wherein the scheduling request with the additional information is carried in 2-bit, when the scheduling request with the additional information is modulated by the QPSK.
10. The method of claim 7 , wherein the scheduling request is received from the UE via the uplink channel only when the UE needs the UL radio resource.
11. The method of claim 7 , wherein the scheduling request is not received from a UE which does not need the UL radio resource.
12. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
a processor, operably coupled to the transceiver, that:
controls the transceiver to receive, from a base station (BS), radio resource allocation information for configuring an uplink channel for transmission of a scheduling request, wherein the radio resource allocation information identifies a frequency domain portion of a control region bordering a data region and within the same time domain to be utilized for transmission of the scheduling request, wherein the control region uses a different frequency band than the data region, and wherein the control region is used to transmit a control signal and the data region is used to transmit user data;
controls the transceiver to configure the uplink channel based on the radio resource allocation information; and
controls the transceiver to transmit, to the BS, the scheduling request with additional information via the identified frequency domain portion of the control region of the uplink channel received in the radio resource allocation information, wherein the scheduling request with the additional information is modulated by a binary phase shift keying (BPSK) or a quadrature phase shift keying (QPSK).
13. The UE of claim 12 , wherein the scheduling request with the additional information is carried in 1-bit, when the scheduling request with the additional information is modulated by the BPSK.
14. The UE of claim 12 , wherein the scheduling request with the additional information is carried in 2-bit, when the scheduling request with the additional information is modulated by the QPSK.
15. The UE of claim 12 , wherein the scheduling request is transmitted via the uplink channel only when the UE needs an uplink (UL) radio resource.
16. A base station (BS) in a wireless communication system, the BS comprising:
a transceiver; and
a processor, operably coupled to the transceiver, that:
controls the transceiver to transmit, to a user equipment (UE) through a broadcast channel, radio resource allocation information for configuring an uplink channel for transmission of a scheduling request, wherein the radio resource allocation information identifies a frequency domain portion of a data region bordering a control region and within the same time domain to be utilized for transmission of the scheduling request, wherein the control region uses a different frequency band than the data region, and wherein the control region is used to only transmit a control signal and the data region is used to only transmit user data;
controls the transceiver to receive, from the UE, the scheduling request with additional information via the identified frequency domain portion of the data region of the uplink channel received in the radio resource allocation information; and
allocates, to the UE, an uplink (UL) radio resource based on the scheduling request,
wherein the scheduling request with the additional information is modulated by a binary phase shift keying (BPSK) or a quadrature phase shift keying (QPSK).
17. The BS of claim 16 , wherein the scheduling request with the additional information is carried in 1-bit, when the scheduling request with the additional information is modulated by the BPSK.
18. The BS of claim 16 , wherein the scheduling request with the additional information is carried in 2-bit, when the scheduling request with the additional information is modulated by the QPSK.
19. The BS of claim 16 , wherein the scheduling request is received from the UE via the uplink channel only when the UE needs the UL radio resource.
20. The BS of claim 16 , wherein the scheduling request is not received from a UE which does not need the UL radio resource.