Efficient status reporting for UEs in dual connectivity during mobility
First Claim
1. A method for transmitting a status report by a mobile station, wherein the mobile station is connected via at least one radio bearer to a master base station and via at least one data radio bearer to a source secondary base station, the method comprising the steps of:
- generating, by the mobile station, the status report when reconfiguring the at least one data radio bearer of the mobile station from the source secondary base station to a target base station, the status report including;
information on a reception status of data packets received by the mobile station via all of the at least one data radio bearer connecting the mobile station to the source secondary base station; and
one radio bearer identifier for each of the at least one data radio bearer whose information is included in the status report; and
transmitting, by the mobile station, the status report to the master base station, the status report being transmitted via a temporary radio bearer, the temporary radio bearer being one of the at least one radio bearer connecting the mobile station to the source secondary base station.
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Accused Products
Abstract
The invention relates to a method for efficiently performing a Se NB change for a UE in dual connectivity. When reconfiguring a data radio bearer going via the Se NB to another target base station, the UE may compile a PDCP status report comprising status information for all of the data radio bearer going via the Se NB, accompanied respectively by a radio bearer ID to identify the radio bearer to which the status report information pertains. Further, the PDCP status report is directly transmitted by the UE to the Me NB to avoid the backhaul delay between the Se NB and the Me NB; this may be done by using a signaling radio bearer (e.g. RRC message), or data radio bearer to the Me NB (e.g. PDCP control PDU), or by using a physical channel transmission to the Me NB (e.g. MAC CE).
27 Citations
18 Claims
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1. A method for transmitting a status report by a mobile station, wherein the mobile station is connected via at least one radio bearer to a master base station and via at least one data radio bearer to a source secondary base station, the method comprising the steps of:
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generating, by the mobile station, the status report when reconfiguring the at least one data radio bearer of the mobile station from the source secondary base station to a target base station, the status report including; information on a reception status of data packets received by the mobile station via all of the at least one data radio bearer connecting the mobile station to the source secondary base station; and one radio bearer identifier for each of the at least one data radio bearer whose information is included in the status report; and transmitting, by the mobile station, the status report to the master base station, the status report being transmitted via a temporary radio bearer, the temporary radio bearer being one of the at least one radio bearer connecting the mobile station to the source secondary base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile station for transmitting a status report, wherein the mobile station is connected via at least one radio bearer to a master base station and via at least one data radio bearer to a source secondary base station, the mobile station comprising:
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a processor which, in operation, generates the status report when the at least one data radio bearer of the mobile station is reconfigured from the source secondary base station to a target base station, the status report including; information on a reception status of data packets received by the mobile station via all of the at least one data radio bearer connecting the mobile station to the source secondary base station; and one radio bearer identifier for each of the at least one data radio bearer whose information is included in the status report; and a transmitter which, in operation, transmits the status report to the master base station, the status report being transmitted via a temporary radio bearer, the temporary radio bearer being one of the at least one radio bearer connecting the mobile station to the source secondary base station. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A master base station for processing a status report transmitted from a mobile station, wherein the mobile station is connected via at least one radio bearer to the master base station and via at least one data radio bearer to a source secondary base station, the base station comprising:
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a receiver which, in operation, receives a status report from the mobile station via a temporary radio bearer, when reconfiguring the at least one data radio bearer of the mobile station from the source secondary base station to a target base station, the temporary radio bearer being one of the at least one radio bearer connecting the mobile station to the source secondary base station, the status report including; information on a reception status of data packets received by the mobile station via all of the at least one data radio bearer connecting the mobile station to the source secondary base station; and one radio bearer identifier for each of the at least one data radio bearer whose information is comprised in the status report.
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Specification