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Method and apparatus for coverage enhancement for a random access process

  • US 9,451,639 B2
  • Filed: 06/30/2014
  • Issued: 09/20/2016
  • Est. Priority Date: 07/10/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • transmitting, by a base station to a User Equipment (UE), a system information block (SIB) that informs a number of resource sets for random access (RA) preamble transmission in a resource from a resource set, wherein each resource set includes time, frequency, and code resources and is associated with a number of repetitions for a RA preamble transmission and with a maximum number of RA preamble transmissions, wherein the SIB is configured to enable the UE to determine the first number of repetitions for a transmission of a RA preamble, a corresponding first resource set, and a corresponding first maximum number of transmissions and a second number of repetitions for a transmission of a RA preamble, a corresponding second resource set, and a corresponding second maximum number of transmissions, and wherein the second number of repetitions is larger than the first number of repetitions; and

    receiving, from the UE;

    the RA preamble, in a resource from the first resource set and with the first number of repetitions, until the UE receives a response for a RA preamble transmission with the first number of repetitions or until the first maximum number of RA preamble transmissions is reached; and

    the RA preamble, in a resource from the second resource set and with the second number of repetitions, after the first maximum number of RA preamble transmissions is reached.

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