METHOD AND MTC DEVICE FOR PERFORMING RANDOM ACCESS PROCEDURE ACCORDING TO PLURALITY OF PARAMETER SETS

• US 20160323917A1
• Filed: 12/23/2014
• Published: 11/03/2016
• Est. Priority Date: 12/30/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: HWANG, Daesung, AHN, Joonkui, YANG, Suckchel, YI, Yunjung
• Granted Patent: US 10,098,156 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

One embodiment of the present specification provides a method for performing a random access procedure for coverage enhancement. The method can comprise the steps of: determining a PRACH resource for a random access preamble on the basis of a repetition level; generating a random access preamble in a specific cell; and repetitively transmitting the generated random access preamble according to the repetition level on the basis of the determined PRACH resource.

Claims

1. A method for performing a random access procedure, the method performed by a MTC (Machine Type Communication) device being located in a coverage enhancement region and the method comprising:

determining a PRACH resource for a random access preamble based on a repetition level;

generating the random access preamble toward a specific cell; and

repeatedly transmitting the generated random access preamble in accordance with the repetition level within the decided PRACH resource.

2. The method of claim 1, wherein the PRACH resource is determined by a transmission period corresponding to the random access preamble and a start timing of the random access preamble within the transmission period.

3. The method of claim 2, wherein the transmission period and the start timing of the random access preamble are independently configured in accordance with the repetition level.

4. The method of claim 1, wherein the PRACH resource is determined by a first period, a second period, and an offset,

wherein the first period corresponds to a period between the transmission periods corresponding to the random access preamble,

wherein the second period corresponds to a period between start timings of the random access preamble within the transmission period, and

wherein the offset corresponds to a time difference between a start timing of the transmission period and a start timing of the random access preamble.

5. The method of claim 4, wherein the first period, the second period, and the offset are configured in the MTC device through a higher layer signal sent from a base station.

6. The method of claim 4, wherein the first period, the second period, and the offset are configured in the MTC device through a system information block (SIB).

7. The method of claim 4, wherein the second period or the offset is independently configured in accordance with the repetition level.

8. The method of claim 1, wherein the PRACH resource is determined through a PRACH configuration index.

9. The method of claim 1, wherein a preamble format corresponding to the random access preamble is determined based on the repetition level.

10. A machine type communication (MTC) device for performing a random access procedure in a coverage enhancement region, the MTC device comprising:

a transceiver configured to transmit a random access preamble toward a specific cell; and

a processor configured to determine a PRACH resource for the random access preamble based on a repetition level, and control the transceiver so as to repeatedly transmit the random access preamble in accordance with the repetition level within the decided PRACH resource.

11. The MTC device of claim 10, wherein the PRACH resource is determined by a first period, a second period, and an offset,

wherein the first period corresponds to a period between the transmission periods corresponding to the random access preamble,

wherein the second period corresponds to a period between start timings of the random access preamble within the transmission period, and

wherein the offset corresponds to a time difference between a start timing of the transmission period and a start timing of the random access preamble.

12. The MTC device of claim 10, wherein the first period, the second period, and the offset are configured in the MTC device through a higher layer signal sent from a base station.