Systems and methods for data offload in wireless networks
View Patent ↗Systems, methods, and apparatuses for radio resource control (RRC) signaling in wireless communication networks with data offload are provided. The radio configuration messages from a small cell to a dual connection UE may be sent by an overlay macro E-UTRAN node-B (eNB). The small cell may send the RRC messages to the macro-eNB first via a backhaul link, and the macro-eNB then transmits the messages to the UE. In some implementations, the radio configuration messages from a small cell to a dual connection UE may be sent directly from the small cell. In some other implementations, some of the RRC messages may be sent selectively to/from either the macro-cell or the small cell, or to/from both the macro-cell and the small cell. The type of RRC messages sent over the small cell and/or the macro-cell may be preconfigured or predetermined.
1. A method of a user equipment (UE), comprising:
transmitting an uplink radio resource control (RRC) messages to a first base station, wherein the uplink RRC message is associated with a second base station, and the UE communicates with a plurality of base stations concurrently;
receiving a first downlink RRC message from the first base station while the UE communicates with both the first base station and the second base station concurrently; and
receiving a second downlink RRC message from the second base station while the UE communicates with both the first base station and the second base station concurrently.
2. The method of claim 1 , wherein the first base station is a low power node, and the second base station is a macro node.
3. The method of claim 1 , wherein the uplink RRC message is forwarded from the first base station to the second base station.
4. The method of claim 3 , wherein the uplink RRC message is forwarded on a backhaul link between the first base station and the second base station.
5. The method of claim 1 , wherein the UE maintains a single RRC entity for configuring a plurality of wireless links.
6. The method of claim 1 , wherein the uplink RRC message includes a RRC information element addressed to the second base station.
7. The method of claim 1 , wherein the second downlink RRC message includes a RRC information element originated from the first base station.
8. The method of claim 1 , further comprising receiving user plane data from both the first base station and the second base station.
9. The method of claim 1 , further comprising transmitting user plane data to both the first base station and the second base station.
10. A method of a first base station, comprising:
receiving an uplink radio resource control (RRC) message from a user equipment (UE), wherein the uplink RRC message is associated with a second base station;
forwarding the uplink RRC message to the second base station; and
transmitting a downlink RRC message from the first base station to the UE while the UE communicates with both the first base station and the second base station concurrently.
11. The method of claim 10 , wherein the first base station is a low power node, and the second base station is a macro node.
12. The method of claim 10 , wherein the uplink RRC message is forwarded on a backhaul link between the first base station and the second base station.
13. The method of claim 10 , wherein the uplink RRC message includes a RRC information element addressed to the second base station.
14. The method of claim 10 , further comprising transmitting user plane data to the UE.
15. A method of a first base station, comprising:
receiving an uplink radio resource control (RRC) message from a second base station, wherein the uplink RRC message is generated by a user equipment (UE) while the UE communicates with both the first base station and the second base station concurrently; and
transmitting a downlink RRC message to the UE while the UE communicates with both the first base station and the second base station concurrently.
16. The method of claim 15 , wherein the first base station is a macro node, and the second base station is a low power node.
17. The method of claim 15 , wherein the uplink RRC message is received on a backhaul link between the first base station and the second base station.
18. The method of claim 15 , wherein the received uplink RRC message is associated with the first base station.
19. The method of claim 15 , further comprising transmitting user plane data to the UE.
20. A user equipment (UE) configured to:
transmit an uplink radio resource control (RRC) messages to a first base station, wherein the uplink RRC message is associated with a second base station, and the UE communicates with a plurality of base stations concurrently;
receive a first downlink RRC message from the first base station while the UE communicates with both the first base station and the second base station concurrently; and
receive a second downlink RRC message from the second base station while the UE communicates with both the first base station and the second base station concurrently.
21. A first base station configured to:
receive an uplink radio resource control (RRC) message from a user equipment (UE), wherein the uplink RRC message is associated with a second base station;
forward the uplink RRC message to the second base station while the UE communicates with both the first base station and the second base station concurrently; and
transmit a downlink RRC message from the first base station to the UE while the UE communicates with both the first base station and the second base station concurrently.
22. A first base station configured to:
receive an uplink radio resource control (RRC) message from a second base station, wherein the uplink RRC message is generated by a user equipment (UE); and
transmit a downlink RRC message to the UE while the UE communicates with both the first base station and the second base station concurrently.