Gateway, master access node and methods thereof

A master access node for a communication system, the master access node comprising:

• a processor, and
• a transceiver configured to
• receive a first sub-sequence of data packets of a sequence of data packets carried by a Radio Access Bearer, RAB, from a gateway, wherein the RAB is associated with a user device,
• receive a Radio Resource Control, RRC, measurement report from the user device, the RRC measurement report being associated with the master access node or a secondary access node, and
• receive a second flow control message from the secondary access node,
• wherein the processor is configured to encapsulate the second flow control message into a first flow control message, and
• wherein the transceiver is further configured to:
• transmit the first flow control message to the gateway, and
• forward at least one part of the first sub-sequence of data packets on the RAB to the user device.

A method performed by a gateway, the method comprising:

• receiving a sequence of data packets on a Radio Access Bearer, RAB, from a core network,
• receiving a first flow control message associated with the RAB from a master access node,
• receiving a second flow control message associated with the RAB from a secondary access node,
• splitting a first distribution of the received sequence of data packets into a first sub-sequence of data packets and at least a second sub-sequence of data packets, wherein the first distribution is determined by the processor based on the received first flow control message and the received second flow control message,
• forwarding the first sub-sequence of data packets on the RAB to the master access node, and
• forwarding the second sub-sequence of data packets on the RAB to the secondary access node.

A method performed by a master access node, the method comprising:

• receiving a first sub-sequence of data packets of a sequence of data packets carried by a Radio Access Bearer, RAB, from a gateway, wherein the RAB is associated with a user device,
• receiving a Radio Resource Control, RRC, measurement report from the user device, the RRC measurement report being associated with a master access node or a secondary access node,
• receiving a second flow control message from the secondary access node,
• encapsulating the second flow control message into a first flow control message,
• transmitting the first flow control message to the gateway, and
• forwarding at least one part of the first sub-sequence of data packets on the RAB to the user device.

A non-transitory computer readable medium comprising a program code for performing, when the computer program runs on a computer, a method comprising:

• receiving a sequence of data packets on a Radio Access Bearer, RAB, from a core network,
• receiving a first flow control message associated with the RAB from a master access node,
• receiving a second flow control message associated with the RAB from a secondary access node,
• splitting a first distribution of the received sequence of data packets into a first sub-sequence of data packets and at least a second sub-sequence of data packets, wherein the first distribution is determined by the processor based on the received first flow control message and the received second flow control message,
• forwarding the first sub-sequence of data packets on the RAB to the master access node, and
• forwarding the second sub-sequence of data packets on the RAB to the secondary access node.

A non-transitory computer readable medium comprising a program code for performing, when the computer program runs on a computer, a method comprising:

• receiving a first sub-sequence of data packets of a sequence of data packets carried by a Radio Access Bearer, RAB, from a gateway, wherein the RAB is associated with a user device,
• receiving a Radio Resource Control, RRC, measurement report from the user device, the RRC measurement report being associated with a master access node or a secondary access node,
• receiving a second flow control message from the secondary access node,
• encapsulating the second flow control message into a first flow control message,
• transmitting the first flow control message to the gateway, and
• forwarding at least one part of the first sub-sequence of data packets on the RAB to the user device.