Method and apparatus for random access for multiple devices in wireless communication system
A method for performing a random access by a device in a wireless communication system is provided. The method includes receiving a broadcast signal including location information which indicates each of at least two partial areas included in a transmission area of a preamble sequence, and transmitting the preamble sequence through one of the at least two partial areas on the basis of the broadcast signal.
1. A method for performing random access by a transmission device in a wireless communication system, the method comprising:
receiving, from a reception device, a broadcast signal comprising configuration information for a preamble sequence transmission region;
selecting a partial region among at least two partial regions included in the preamble sequence transmission region based on the configuration information included in the broadcast signal; and
transmitting a preamble sequence for the random access through the selected partial region,
wherein the configuration information indicates at least two start points corresponding to the at least two partial regions in a time domain and at least two sequence lengths corresponding to the at least two start points.
2. The method of claim 1 , wherein the configuration information comprises mode information indicating a scheme for selecting the partial region among the at least two partial regions.
3. The method of claim 2 , wherein the selecting comprises:
if the configuration information comprises a first mode information, comparing a receive signal strength of the broadcast signal with a signal strength threshold value; and
selecting the partial region among the at least two partial regions based on a result of the comparing.
4. The method of claim 2 , wherein the selecting comprises:
if the configuration information comprises a first mode information, comparing a receive signal strength of the broadcast signal with a signal strength threshold value;
if the receive signal strength of the broadcast signal is greater than or equal to the signal strength threshold value, selecting a first partial region among the at least two partial regions; and
if the receive signal strength of the broadcast signal is less than the signal strength threshold value, selecting one of remaining regions except for the first partial region among the at least two partial regions.
5. The method of claim 2 , wherein the selecting comprises:
if the configuration information comprises a second mode information, selecting a random access resource configuration indicated by the second mode information among random access resource configurations shared with a plurality of reception devices; and
selecting the partial region among the at least two partial regions based on the selected random access resource configuration.
6. The method of claim 1 , wherein the configuration information comprises at least one of a sequence length according to a service type of the transmission device, or a modulation or coding scheme (MCS) level of the transmission device.
7. A method for detecting random access by a reception device in a wireless communication system, the method comprising:
generating a broadcast signal comprising configuration information for a preamble sequence transmission region;
transmitting, to a transmission device, the broadcast signal; and
receiving, a preamble sequence transmitted by a transmission device through a partial region indicated by the configuration information among at least two partial regions included in the preamble sequence transmission region,
wherein the configuration information indicates at least two start points corresponding to the at least two partial regions in a time domain and at least two sequence lengths corresponding to the at least two start points.
8. The method of claim 7 , wherein the configuration information comprises mode information indicating a scheme for selecting the partial region among the at least two partial regions.
9. The method of claim 8 ,
wherein the mode information comprises one of a first mode and a second mode,
wherein the first mode indicates selecting the partial region among the at least two partial regions based on a comparing result between a receive signal strength of the broadcast signal and a signal strength threshold value, and
wherein the second mode indicates selecting the partial region among the at least two partial regions based on random access resource configurations shared with a plurality of reception devices.
10. The method of claim 7 , wherein the configuration information comprises at least one of a sequence length according to a service type of the transmission device, or a modulation or coding scheme (MCS) level of the transmission device.
11. A transmission device for performing random access in a wireless communication system, the transmission device comprising:
a transceiver configured to receive, from a reception device, a broadcast signal comprising configuration information for a preamble sequence transmission region; and
a controller configured to:
select a partial region among at least two partial regions included in the preamble sequence transmission region based on the configuration information included in the broadcast signal, and
control the transceiver to transmit a preamble sequence for the random access through the selected partial region,
wherein the configuration information indicates at least two start points corresponding to the at least two partial regions in a time domain and at least two sequence lengths corresponding to the at least two start points.
12. The transmission device of claim 11 , wherein the configuration information comprises mode information indicating a scheme for selecting the partial region among the at least two partial regions.
13. The transmission device of claim 12 , wherein, if the configuration information comprises a first mode information, the controller is further configured to:
compare a receive signal strength of the broadcast signal with a signal strength threshold value, and
select the partial region among the at least two partial regions based on a result of the comparing.
14. The transmission device of claim 12 , wherein, if the configuration information comprises a first mode information, the controller is further configured to:
compare a receive signal strength of the broadcast signal with a signal strength threshold value,
if the receive signal strength of the broadcast signal is greater than or equal to the signal strength threshold value, select a first partial region among the at least two partial regions, and
if the receive signal strength of the broadcast signal is less than the signal strength threshold value, select one of remaining regions except for the first partial region among the at least two partial regions.
15. The transmission device of claim 12 , wherein if the configuration information comprises a second mode information, the controller is further configured to:
select a random access resource configuration indicated by the second mode information among random access resource configurations shared with a plurality of reception devices, and
select the partial region among the at least two partial regions based on the selected random access resource configuration.
16. The transmission device of claim 11 , wherein the configuration information comprises at least one of a sequence length according to a service type of the transmission device, or modulation or coding scheme (MCS) level of the transmission device.
17. A reception device for detecting random access by in a wireless communication system, the reception device comprising:
a transceiver; and
a controller configured to:
generate a broadcast signal comprising configuration information for a preamble sequence transmission region, and
control the transceiver to transmit the broadcast signal to a transmission device, and to receive, a preamble sequence transmitted by a transmission device through a partial region indicated by the configuration information among at least two partial regions included in the preamble sequence transmission region,
wherein the configuration information indicates at least two start points corresponding to the at least two partial regions in a time domain and at least two sequence lengths corresponding to the at least two start points.
18. The reception device of claim 17 , wherein the configuration information comprises mode information indicating a scheme for selecting the partial region among the at least two partial regions.
19. The reception device of claim 18 ,
wherein the mode information comprises one of a first mode and a second mode,
wherein the first mode indicates selecting the partial region among the at least two partial regions based on a comparing result between a receive signal strength of the broadcast signal and a signal strength threshold value, and
wherein the second mode indicates selecting the partial region among the at least two partial regions based on random access resource configurations shared with a plurality of reception devices.
20. The reception device of claim 17 , wherein the configuration information comprises at least one of a sequence length according to a service type of the transmission device, or modulation or coding scheme (MCS) level of the transmission device.