Connection modification method applicable to user equipment and base station
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United States of America Patent
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Feb 13, 2018
Issued Date -
N/A
app pub date -
Mar 13, 2015
filing date -
Mar 14, 2014
priority date (Note) -
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Abstract
The disclosure is directed to a connection modification method in a dual connectivity scenario. In one of the exemplary embodiments, a UE configures a first MCG bearer for communication with a first base station; configures a SCG bearer for communication with a second base station; generates and transmits a first encrypted PDCP SDU by encrypting a first PDCP SDU of the first MCG bearer by using a first security key, a first TX_HFN and a first PDCN SN associated with the first PDCP SDU; generates and transmits a second encrypted PDCP SDU; receives a third bearer configuration re-configuring the SCG bearer as either a second MCG bearer or a split bearer; generates a third encrypted PDCP SDU by encrypting a third PDCP SDU of the SCG bearer and transmits the third encrypted PDCP SDU after the SCG bearer is reconfigured as the second MCG bearer or the split bearer.
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