Methods, apparatus and systems for performing multi-radio access technology carrier aggregation
A method of managing carrier aggregation for a multi-radio access technology (RAT) wireless transmitter/receiver unit (WTRU) is disclosed. The method may include: receiving, by the WRTU over a primary channel associated with a RAT of a first type, provisioning information for provisioning a supplementary channel associated with a RAT of a second type; establishing the supplementary channel associated with the RAT of the second type based on the received provisioning information; and wirelessly exchanging, by the WRTU, first data associated with a communication over the primary channel via the RAT of the first type, while wireless exchanging second data associated with the communication over the supplementary channel via the RAT of the second type.
1. A method of managing a multi-radio access technology (multi-RAT) wireless transmitter/receiver unit (WTRU), the method comprising:
configuring, by the multi-RAT WTRU, a primary radio connection of a RAT of a first type associated with a single core network control plane connection of the RAT of the first type;
receiving, by the multi-RAT WTRU via the primary radio connection, configuration information to configure a secondary radio connection of a RAT of a second type;
configuring, by the multi-RAT WTRU, the secondary radio connection of the RAT of the second type based on the received configuration information of the RAT of the second type;
receiving, by the multi-RAT WTRU, control information related to the RAT of the second type using the primary radio connection;
determining, by the multi-RAT WTRU, that a radio link failure (RLF) has occurred on the RAT of the second type; and
transmitting, by the multi-RAT WTRU, a message using resources of the RAT of the first type based on the determined RLF.
2. The method of claim 1 , wherein the RAT of first type is a long-term evolution (LTE) RAT and the RAT of the second type is different from the RAT of the first type.
3. The method of claim 1 , wherein the RAT of the first type is a 3 GPP RAT and the RAT of the second type is a different 3 GPP RAT.
4. The method of claim 1 , wherein the transmitting of the message using resources of the RAT of the first type includes transmitting, via the primary radio connection, RLF information that is associated with the RLF that has occurred on the RAT of the second type.
5. The method of claim 1 , wherein the receiving of the control information includes receiving, via the primary radio connection, one or more Protocol Data Units (PDUs) of the RAT of the second type.
6. The method of claim 1 , further comprising:
demultiplexing the received control information related to the RAT of the second type, to obtain one or more Protocol Data Units (PDUs) of the RAT of the second type; and
passing, by a layer or a sublayer of a protocol stack associated with the RAT of the first type, the obtained one or more PDUs to a layer or a sublayer of a protocol stack associated with the RAT of the second type.
7. The method of claim 1 , wherein the transmitting of the message includes sending a notification over the primary radio connection on condition that the RLF has occurred on the secondary radio connection of the RAT of the second type.
8. The method of claim 7 , wherein the notification is a layer 2 message or a layer 3 message.
9. The method of claim 1 , further comprising:
receiving, via the primary radio connection of the RAT of the first type, a message requesting the multi-RAT WTRU to perform a random access procedure for the RAT of the second type;
initiating, by the multi-RAT WTRU, the random access procedure; and
receiving, by the multi-RAT WTRU as part of the random access procedure, a random access response including a grant for resources of the RAT of the second type over the primary radio connection of the RAT of the first type.
10. The method of claim 1 , further comprising receiving, by the multi-RAT WTRU, a first discontinuous reception (DRX) configuration associated with the RAT of the first type and a second, different DRX configuration associated with the RAT of the second type.
11. A multi-radio access technology (multi-RAT) wireless transmitter/receiver unit (WTRU), comprising:
a processor configured to:
configure a primary radio connection of a RAT of a first type associated with a single core network control plane connection of the RAT of the first type,
configure a secondary radio connection of the RAT of the second type based on configuration information of the RAT of the second type, and
determine that a radio link failure (RLF) has occurred on the RAT of the second type; and
a wireless transmit/receive unit configured to:
receive, via the primary radio connection, the configuration information to configure the secondary radio connection of the RAT of the second type,
receive control information related to the RAT of the second type using the primary radio connection, and
transmit a message using resources of the RAT of the first type based on the determined RLF.
12. The multi-RAT WTRU of claim 11 , wherein the RAT of the first type is a long-term evolution (LTE) RAT and the RAT of the second type is different from the RAT of the first type.
13. The multi-RAT WTRU of claim 11 , wherein the RAT of the first type is a 3 GPP RAT and the RAT of the second type is a different 3 GPP RAT.
14. The multi-RAT WTRU of claim 11 , wherein the wireless transmit/receive unit is configured to transmit, via the primary radio connection, RLF information that is associated with the RLF that has occurred on the RAT of the second type.
15. The multi-RAT WTRU of claim 11 , wherein the wireless transmit/receive unit is configured to receive, via the primary radio connection, one or more Protocol Data Units (PDUs) of the RAT of the second type.
16. The multi-RAT WTRU of claim 11 , wherein the processor is configured to:
demultiplex the received control information related to the RAT of the second type to obtain one or more Protocol Data Units (PDUs) of the RAT of the second type; and
pass, by a layer or a sublayer of a protocol stack associated with the RAT of the first type to a layer or a sublayer of a protocol stack associated with the RAT of the second type, the obtained one or more PDUs.
17. The multi-RAT WTRU of claim 11 , wherein the wireless transmit/receive unit is configured to send a notification over the primary radio connection on condition that the RLF has occurred on the secondary radio connection of the RAT of the second type.
18. The multi-RAT WTRU of claim 17 , wherein the notification is a layer 2 message or a layer 3 message.
19. The multi-RAT WTRU of claim 11 , wherein:
the wireless transmit/receive unit is configured to receive, via the primary radio connection of the RAT of the first type, a message requesting the multi-RAT WTRU to perform a random access procedure for the RAT of the second type;
the processor is configured to initiate the random access procedure; and
the wireless transmit/receive unit is configured to receive, as part of the random access procedure, a random access response including a grant for resources of the RAT of the second type over the primary radio connection of the RAT of the first type.
20. The multi-RAT WTRU of claim 11 , wherein the wireless transmit/receive unit is configured to receive a first discontinuous reception (DRX) configuration associated with the RAT of the first type and a second, different DRX configuration associated with the RAT of the second type.