Uplink signaling for dual connectivity

A method for enabling a wireless device to transmit an uplink signaling message in a wireless communication network, wherein the wireless device is connected to a first network element over at least a first and a second wireless link, the method being performed in the first network element, the method comprising:

• determining at least one transmission mode among alternative transmission modes for transmitting the uplink signaling message, the alternative transmission modes comprising:
• transmitting on the first wireless link;
• transmitting on the second wireless link;
• and transmitting on both the first and the second wireless links, wherein the determining is based on criteria for determining transmission mode, and
• transmitting information to the wireless device enabling the wireless device to determine transmission mode for transmitting the uplink signaling message, the information comprising an indication of the determined at least one transmission mode.

A wireless device configured to transmit an uplink signaling message in a wireless communication network, the wireless device being connectable to a first network element over at least a first and a second wireless link, the wireless device being further configured to:

• determine a transmission mode among alternative transmission modes for transmitting the uplink signaling message, the alternative transmission modes comprising:
• transmitting on the first wireless link;
• transmitting on the second wireless link;
• and
• transmitting on both the first and the second wireless links;
• and
• transmit the uplink signaling message according to the determined transmission mode.

A first network element configured to enable a wireless device to transmit an uplink signaling message in a wireless communication network, wherein the wireless device is connectable to the first network element over at least a first and a second wireless link, the first network element being further configured to:

• determine at least one transmission mode among alternative transmission modes for transmitting the uplink signaling message, the alternative transmission modes comprising:
• transmitting on the first wireless link;
• transmitting on the second wireless link;
• and transmitting on both the first and the second wireless links, wherein the determining is based on criteria for determining transmission mode, and
• transmit information to the wireless device enabling the wireless device to determine transmission mode for transmitting the uplink signaling message, the information comprising an indication of the determined at least one transmission mode.