Method and MTC device for performing random access procedure according to plurality of parameter sets

• US 10,098,156 B2
• Filed: 12/23/2014
• Issued: 10/09/2018
• 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
• Primary Examiner(s): Zhao, Wei
• Application Number:
  US15/108,857
• Publication Number:
  US 20160323917A1
• Time in Patent Office: 1,386 Days
• 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 Machine Type Communication (MTC) device being located in a coverage enhancement region and the method comprising:

determining a Physical Random Access Channel (PRACH) resource for a random access preamble according to a first period, a second period, and an offset,

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

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

wherein the offset corresponds to an offset dependent on the first period and/or the second period,

wherein the first period, the second period, and the offset are independently configured in accordance with a repetition level, and

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;

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 determined PRACH resource.

2. The method of claim 1, wherein the first period, the second period, and the offset are configured in the MTC device through a system information block (SIB).

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

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

5. 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 Physical Random Access Channel (PRACH) resource for the random access preamble according to a first period, a second period, and an offset, and control the transceiver so as to repeatedly transmit the random access preamble in accordance with a repetition level within the determined PRACH resource,

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

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

wherein the offset corresponds to an offset dependent on the first period and/or the second period,

wherein the first period, the second period, and the offset are independently configured in accordance with the repetition level, and

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.