1. A method for receiving a signal of a Random Access Channel (RACH) in a wireless communication system using beamforming, the method comprising:
receiving the signal through each transmission beam of a transmitter from the transmitter; and
detecting symbols by switching to reception beams corresponding to the symbols included in the signal during reception of the signal.
2. The method of claim 1, wherein the signal is allocated to a total frequency band of the wireless communication, and to one of subbands obtained by dividing the total frequency band.
3. The method of claim 2, wherein if the signal is allocated to one of the subbands, the subbands to which the signal is not allocated are allocated to signals transmitted by transmitters of other users.
4. The method of claim 1, wherein the detecting of the symbols comprises:
resetting a reception beam of the receiver, upon receipt of the signal,
determining the reception beam as a best reception beam if a signal strength of a symbol detected by the reset reception beam is equal to or larger than a threshold, and
determining a timing of the reception beam between the transmitter and the receiver; and
transmitting, to the transmitter, detection information including information about the best reception beam, a transmission beam mapped to the best reception beam, and the timing of the reception beam.
5. The method of claim 4, wherein the detecting of the symbols further comprises:
if the signal strength of the symbol detected by the reset reception beam is smaller than the threshold, comparing a signal strength of a symbol detected by a next reception beam with the threshold.
6. A receiver for receiving a signal of a Random Access Channel (RACH) in a wireless communication system using beamforming, the receiver comprising:
a transceiver configured to receive the signal through each transmission beam of a transmitter from the transmitter; and
a controller configured to detect symbols included in the signal by switching to reception beams corresponding to the symbols during reception of the signal.
7. The receiver of claim 6, wherein the signal is allocated to a total frequency band of the wireless communication, and to one of subbands obtained by dividing the total frequency band.
8. The receiver of claim 7, wherein if the signal is allocated to one of the subbands, the subbands to which the signal is not allocated are allocated to signals transmitted by transmitters of other users.
9. The receiver of claim 6, wherein upon receipt of the signal, the controller resets a reception beam of the receiver, determines the reception beam as a best reception beam if a signal strength of a symbol detected by the reset reception beam is equal to or larger than a threshold, determines a timing of the reception beam between the transmitter and the receiver, and controls the transceiver to transmit, to the transmitter, detection information including information about the best reception beam, a transmission beam mapped to the best reception beam, and the timing of the reception beam.
10. The receiver of claim 9, wherein if the signal strength of the symbol detected by the reset reception beam is smaller than the threshold, the controller compares a signal strength of a symbol detected by a next reception beam with the threshold.
11. A method for transmitting a Random Access Channel (RACH) signal in a wireless communication system using beamforming, the method comprising:
generating an RACH signal including repeated symbols corresponding to reception beams of a receiver; and
transmitting the RACH signal to the receiver by each transmission beam.
12. The method of claim 11, wherein the generating of the RACH signal comprises:
if the wireless communication system comprises a plurality of receivers, dividing a total frequency band of the wireless communication system into as many subbands as the number of the receivers, and allocating the subbands to the receivers.
13. The method of claim 11, wherein the generating of the RACH signal comprises:
inserting a guard interval between the symbols, taking into account a switching time between reception beams at the receiver.
14. A transmitter for transmitting a Random Access Channel (RACH) signal in a wireless communication system using beamforming, the transmitter comprising:
a controller configured to generate an RACH signal including repeated symbols corresponding to reception beams of a receiver; and
a transceiver configured to transmit the RACH signal to the receiver by each transmission beam.
15. The transmitter of claim 14, wherein if the wireless communication system comprises a plurality of receivers, the controller divides a total frequency band of the wireless communication system into as many subbands as the number of the receivers and allocates the subbands to the receivers.
16. The transmitter of claim 14, wherein the controller inserts a guard interval between the symbols, taking into account a switching time between reception beams at the receiver.
17. A non-transitory computer-readable storage medium storing instructions that, when executed, cause at least one processor to perform the method of claim 1.
18. A non-transitory computer-readable storage medium storing instructions that, when executed, cause at least one processor to perform the method of claim 11.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for improving microcirculation andor acute wound healing in a subject who is about to undergo, is undergoing or has undergone surgery or a physical trauma comprising introducing into the subject’s bloodstream a therapeutically effective number of genetically modified CD34-stem cells, wherein (a) each of the genetically modified CD34-stem cells contains an exogenous nucleic acid comprising (i) a region encoding a protein which enhances endothelial cell growth, which region is operably linked to (ii) an endothelium-specific promoter or promoterenhancer combination, and (b) the introduction of the genetically modified CD34-stem cells is not preceded, accompanied or followed by myeloablation.
2. The method of claim 1, wherein the subject is human.
3. The method of claim 2, wherein the surgery is abdominal surgery, thoracic surgery, neurosurgery or plastic surgery.
4. The method of claim 2, wherein the surgery is laproscopic surgery.
5. The method of claim 2, wherein the surgery is open surgery.
6. The method of claim 2, wherein the physical trauma is childbirth.
7. The method of claim 2, wherein the physical trauma is a flesh wound caused by a violent act, and the genetically modified CD34-stem cells are introduced into the subject’s bloodstream immediately following the physical trauma.
8. The method of claim 2, wherein the physical trauma is a burn wound, and the genetically modified CD34-stem cells are introduced into the subject’s bloodstream immediately following the physical trauma.
9. The method of claim 2, wherein the promoterenhancer combination is the Tie2 promoterenhancer and the protein which enhances endothelial cell growth is a vascular endothelial growth factor (VEGF) associated with angiogenesis.
10. The method of claim 2, wherein the genetically modified CD34-stem cells are allogenic with respect to the subject.
11. The method of claim 2, wherein the genetically modified CD34-stem cells are autologous with respect to the subject.
12. The method of claim 2, wherein the therapeutically effective number of genetically modified CD34-stem cells is from about 1\xd7103 to about 1\xd7107 cellskg body weight.