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Method and apparatus for transmitting/receiving signal in mobile communication system supporting a plurality of carriers

  • US 9,967,784 B2
  • Filed: 03/20/2015
  • Issued: 05/08/2018
  • Est. Priority Date: 03/21/2014
  • Status: Active Grant
First Claim
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1. A method by a user equipment (UE) in a communication system supporting carrier aggregation, the method comprising:

  • receiving, from a base station, a first message for requesting UE capability information;

    transmitting, to the base station, a second message including the UE capability information, wherein the UE capability information includes first information on band combinations supported by the UE, second information indicating whether the UE supports DC for each of the band combinations supported by the UE, third information on whether to support a split bearer and fourth information on whether to support a secondary cell group (SCG) bearer to an evolved universal terrestrial radio access (E-UTRA) includes supported band combination information element about combinations supported by the UE;

    receiving, from the base station, a third message generated based on the first information and the second information, the third message including configuration information for SCG;

    establishing an SCG RLC entity and performing a packet data convergence protocol (PDCP) reordering function if the configuration information indicates a change from an MCG bearer to a split bearer; and

    releasing the SCG RLC entity if the configuration information indicates a change from the split bearer to the MCG bearer.

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