Data transmission method, base station, and user equipment
Embodiments of the present invention provide a data transmission method, a base station, and a user equipment (UE). The method includes: generating, by a first base station, downlink radio link control (RLC) protocol data units (PDUs); and sending, by the first base station, a first part of downlink RLC PDUs in the downlink RLC PDUs to a user equipment UE, and sending a second part of downlink RLC PDUs in the downlink RLC PDUs to a second base station, so that the second base station sends the second part of downlink RLC PDUs to the UE. Hence, the first base station and the second base station are capable of jointly sending data to the UE, thereby improving a peak rate and a throughput of the UE.
1. A method, comprising:
sending, by a first base station, a request to a second base station for configuration of a second cell, the request comprising data radio bearer (DRB) configuration information, wherein the DRB configuration information comprises an evolved radio access bearer (E-RAB) quality of service (QoS) parameter and a DRB identifier, and the E-RAB QoS parameter is a QoS parameter after a splitting decision made by the first base station;
receiving, by the first base station, a response from the second base station, wherein the response comprises resource information of the second cell; sending, by the first base station, the resource information of the second cell to a user equipment (UE);
receiving, by the first base station, an RRC connection reconfiguration complete message from the UE;
sending, by the first base station, a configuration complete message to the second base station; and
splitting, by the first base station, data of the DRB that is sent to the second base station.
2. The method according to claim 1 , wherein the request is further used to instruct the second base station to create signaling radio bearer (SRB) for the UE.
3. The method according to claim 1 , further comprising:
receiving, by the first base station, a message sent from the second base station, wherein the message is used to indicate information about a buffer size for buffering split data to be sent from the first base station to the secondary base station.
4. The method according to claim 1 , further comprising:
receiving, by the first base station, extended Power Headroom Reporting (PHR), the PHR comprising:
type 1 power headroom (PH) and type 2 PH of a first cell of the first base station; and
type 1 PH of the second cell of the second base station.
5. An apparatus of a first base station, comprising:
a processor configured to:
split data of a data radio bearer (DRB) to be sent to the second base station;
a transmitter configured to:
send a request to a second base station for configuration of a second cell, the request comprising DRB configuration information, wherein the DRB configuration information comprises an evolved radio access bearer (E-RAB) quality of service (QoS) parameter and a DRB identifier, and the E-RAB QoS parameter is a QoS parameter after a splitting decision made by the first base station, and
send a configuration complete message to the second base station after an RRC connection reconfiguration complete message is received;
a receiver configured to receive a response from the second base station, wherein the response comprises resource information of the second cell; and
wherein the transmitter is further configured to:
send the resource information of the second cell to a user equipment (UE),
receive the RRC connection reconfiguration complete message from the UE, and
send the split data to the second base station.
6. The apparatus according to claim 5 , wherein the request is further used to instruct the second base station to create signaling radio bearer (SRB) for the UE.
7. The apparatus according to claim 5 , wherein:
the receiver is further configured to receive a message sent from the second base station, wherein the message is used to indicate information a buffer size for buffering split data to be sent from the first base station to the secondary base station.
8. The apparatus according to claim 5 , wherein the receiver is further configured to receive extended Power Headroom Reporting (PHR), the PHR comprising:
type 1 power headroom (PH) and type 2 PH of a first cell of the first base station; and
type 1 PH of the second cell of the second base station.