Uplink reconfiguration for split bearer in dual connectivity

A method in a wireless device, the wireless device operating in dual connectivity with a first network node and a second network node, the method comprising:

• establishing an uplink radio connection from the wireless device to the first network node and to the second network node, the wireless device comprising a first Medium Access Control (MAC) module and a first Radio Link Control (RLC) module for uplink radio communication with the first network node, a second MAC module and a second RLC module for uplink radio communication with the second network node, and a Packet Data Convergence Protocol (PDCP) module for communicating with the first RLC module and the second RLC module;
• communicating data for uplink transmission from the PDCP module to the first RLC module;
• obtaining an indication to switch transmission of uplink data from the first network node to the second network node;
• communicating data pending for uplink transmission in the first RLC module and the first MAC module to the first network node;
• and
• communicating data pending for uplink transmission in the PDCP module to the second network node.

A method in a first network node, the first network node operating in dual connectivity with a wireless device and a second network node, the method comprising:

• establishing an uplink radio connection from the wireless device to the first network node and to the second network node, the wireless device comprising a first Medium Access Control (MAC) module and a first Radio Link Control (RLC) module for uplink radio communication with the first network node, a second MAC module and a second RLC module for uplink radio communication with the second network node, and a Packet Data Convergence Protocol (PDCP) module for communicating with the first RLC module and the second RLC module;
• communicating, to the wireless device, an indication to switch transmission of uplink data, via the PDCP module, from the first network node to the second network node;
• and
• communicating, to the wireless device, a configuration parameter for switching transmission of uplink data, via the PDCP module, from the first network node to the second network node.

A wireless device configured to operate in dual connectivity with a first network node and a second network node, the wireless device comprising:

• one or more processors comprising:
• a first Medium Access Control (MAC) module and a first Radio Link Control (RLC) module for uplink radio communication with the first network node;
• a second MAC module and a second RLC module for uplink radio communication with the second network node;
• and
• a Packet Data Convergence Protocol (PDCP) module for communicating with the first RLC module and the second RLC module;
• and
• at least one memory, the memory containing instructions executable by the one or more processors whereby the wireless device is operable to:
• establish an uplink radio connection from the wireless device to the first network node and to the second network node;
• communicate data for uplink transmission from the PDCP module to the first RLC module;
• obtain an indication to switch transmission of uplink data from the first network node to the second network node;
• reset the first RLC module and the first MAC module;
• and
• communicate data for uplink transmission from the PDCP module to the second RLC module.

A wireless device configured to operate in dual connectivity with a first network node and a second network node, the wireless device comprising:

• one or more processors comprising:
• a first Medium Access Control (MAC) module and a first Radio Link Control (RLC) module for uplink radio communication with the first network node;
• a second MAC module and a second RLC module for uplink radio communication with the second network node;
• and
• a Packet Data Convergence Protocol (PDCP) module for communicating with the first RLC module and the second RLC module;
• and
• at least one memory, the memory containing instructions executable by the one or more processors whereby the wireless device is operable to:
• establish an uplink radio connection from the wireless device to the first network node and to the second network node;
• communicate data for uplink transmission from the PDCP module to the first RLC module;
• obtain an indication to switch transmission of uplink data from the first network node to the second network node;
• communicate data pending for uplink transmission in the first RLC module and the first MAC module to the first network node;
• and
• communicate data pending for uplink transmission in the PDCP module to the second network node.

A network node configured to operate in dual connectivity with a wireless device and a second network node, the network node comprising:

• one or more processors;
• and
• at least one memory, the memory containing instructions executable by the one or more processors whereby the network node is operable to:
• establish an uplink radio connection from the wireless device to the first network node and to the second network node;
• communicate, to the wireless device, an indication to switch transmission of uplink data, via the PDCP module, from the first network node to the second network node;
• and
• communicate, to the wireless device, a configuration parameter for switching the uplink radio connection.