Efficient uplink scheduling mechanisms for dual connectivity
AssigneeSun Patent Trust
InventorsPrateek Basu Mallick, Joachim Loehr, Hidetoshi Suzuki
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Abstract
The present disclosure mainly relates to improvements for the buffer status reporting and the logical channel prioritization procedures performed in the UE, in scenarios where the UE is in dual connectivity and the PDCP layer of the UE is shared in the uplink for MeNB and SeNB. According to the present disclosure, a ratio is introduced according to which the buffer values for the PDCP are split in the UE between the SeNB and the MeNB according to said ratio.
Claims20
A communication method for a mobile node connectable to a master base station and to a secondary base station by using a split bearer split across the master base station and the secondary base station, wherein a Packet Data Convergence Protocol (PDCP) layer located in the mobile node is shared for the split bearer between the master base station and the secondary base station, the method comprising:
- splitting by the mobile node a total buffer occupancy of the PDCP layer in the mobile node between the master base station and the secondary base station based on a split ratio, into a first PDCP buffer occupancy value for the master base station and a second PDCP buffer occupancy value for the secondary base station;
- generating by the mobile node a first buffer status report for the master base station based on the first PDCP buffer occupancy value, and generating a second buffer status report for the secondary base station based on the second PDCP buffer occupancy value;
- and
- transmitting by the mobile node the first buffer status report to the master base station, and transmitting by the mobile node the second buffer status report to the secondary base station;
- wherein a particular split ratio is defined such that one of the first and second PDCP buffer occupancy values is equal to the total buffer occupancy of the PDCP layer in the mobile node for the split bearer, and such that the other one of the first and second PDCP buffer occupancy values is equal to zero, and
- wherein, when being configured with the particular split ratio, the mobile node deactivates the split bearer for uplink data, processed by the PDCP layer, to either the master base station or the secondary base station depending on the particular split ratio.
A mobile node connectable to a master base station and to a secondary base station by using a split bearer split across the master base station and the secondary base station, wherein a Packet Data Convergence Protocol (PDCP) layer located in the mobile node is shared for the split bearer between the master base station and the secondary base station, the mobile node comprising:
- a processor which, in operation,
- splits a total buffer occupancy of the PDCP layer in the mobile node between the master base station and the secondary base station, based on a split ratio, into a first PDCP buffer occupancy value for the master base station and a second PDCP buffer occupancy value for the secondary base station;
- generates a first buffer status report for the master base station based on the first PDCP buffer occupancy value, and generates a second buffer status report for the secondary base station based on the second PDCP buffer occupancy value;
- and
- a transmitter, which is coupled to the processor and which, in operation, transmits the first buffer status report to the master base station, and transmits the second buffer status report to the secondary base station;
- wherein a particular split ratio is defined such that one of the first and second PDCP buffer occupancy values is equal to the total buffer occupancy of the PDCP layer in the mobile node for the split bearer, and such that the other one of the first and second PDCP buffer occupancy values is equal to zero, and
- wherein, when being configured with the particular split ratio, the mobile node deactivates the split bearer for uplink data, processed by the PDCP layer, to either the master base station or the secondary base station depending on the particular split ratio.
Dependencies are inferred from the claim text.