Method for transmitting downlink data, base station and user equipment

1. A method for transmitting downlink data, comprising:

generating, by a base station, on reception of downlink traffic data sent by a core network to a user equipment in a light connection (LC) state, a triggering message based on an identifier of the user equipment in the LC state; and

controlling, by the base station, based on the triggering message, the user equipment in the LC state to recover to a connection state;

wherein the generating the triggering message based on the identifier of the user equipment in the LC state comprises: generating, based on the identifier of the user equipment in the LC state, an enhanced paging message comprising the identifier of the user equipment in the LC state;

wherein the generating, based on the identifier of the user equipment in the LC state, the enhanced paging message comprising the identifier of the user equipment in the LC state comprises: scrambling a downlink control channel using the identifier of the user equipment in the LC state as a scramble code, to generate the enhanced paging message; or, taking the identifier of the user equipment in the LC state as a content of a downlink shared channel, scrambling a downlink control channel using a preset scramble code, and performing a scheduling through the scrambled downlink control channel, to generate the enhanced paging message.

2. The method for transmitting the downlink data according to claim 1 , wherein after the step of controlling, based on the triggering message, the user equipment in the LC state to recover to the connection state, the method for transmitting the downlink data further comprises: sending, by the base station, the downlink traffic data to the user equipment recovered to the connection state.

3. The method for transmitting downlink data according to claim 1 , wherein the step of controlling, based on the triggering message, the user equipment in the LC state to recover to a connection state comprises: sending the triggering message to the user equipment in the LC state through a downlink control channel, to recover the user equipment in the LC state from the LC state to the connection state.

4. The method for transmitting the downlink data according to claim 3 , wherein the step of sending the triggering message to the user equipment in the LC state through the downlink control channel comprises:

sending the triggering message to the user equipment in the LC state through the downlink control channel in the shorter of a configured user equipment specific discontinuous reception (DRX) cycle and a DRX cycle comprised in a system broadcast; or

sending the triggering message to the user equipment in the LC state through the downlink control channel in a DRX cycle comprised in a system broadcast; or

sending the triggering message to the user equipment in the LC state through the downlink control channel in a configured user equipment specific DRX cycle.

5. The method for transmitting the downlink data according to claim 1 , wherein the identifier of the user equipment in the LC state is configured by:

configuring a user equipment identifier for the user equipment in the LC state, when the base station configures the user equipment to enter the LC state; or

reconfiguring a user equipment identifier for the user equipment in the LC state, when the user equipment in the LC state moves from a first cell region to a second cell region;

wherein each of the first cell region and the second cell region comprises at least one cell.

6. A method for transmitting downlink data, comprising:

receiving, by a user equipment, a triggering message that is generated by a base station when the base station receives downlink traffic data from a core network; and

recovering, by the user equipment, from a light connection (LC) state to a connection state according to the triggering message;

wherein the triggering message is generated by the based station based on an identifier of the user equipment in the LC state;

wherein generating the triggering message based on the identifier of the user equipment in the LC state comprises: generating, based on the identifier of the user equipment in the LC state, an enhanced paging message comprising the identifier of the user equipment in the LC state;

wherein generating, based on the identifier of the user equipment in the LC state, the enhanced paging message comprising the identifier of the user equipment in the LC state comprises: scrambling a downlink control channel using the identifier of the user equipment in the LC state as a scramble code, to generate the enhanced paging message; or, taking the identifier of the user equipment in the LC state as a content of a downlink shared channel, scrambling a downlink control channel using a preset scramble code, and performing a scheduling through the scrambled downlink control channel, to generate the enhanced paging message.

7. The method for transmitting the downlink data according to claim 6 , wherein the step of recovering from the LC state to the connection state according to the triggering message comprises:

determining, based on the enhanced paging message that comprises the identifier of the user equipment in the LC state and is generated by the base station on reception of the downlink traffic data from the core network, that the identifier of the user equipment in the enhanced paging message is the same as a stored identifier of the user equipment, initiating an air interface connection directly, to recover from the LC state to the connection state.

8. A base station, comprising:

a processor, a memory and a transceiver, wherein

the processor is configured to read a program in the memory to perform a process of:

generating, on reception of downlink traffic data sent by a core network to a user equipment in a light connection (LC) state, a triggering message based on an identifier of the user equipment in the LC state; and

controlling, based on the triggering message, the user equipment in the LC state to recover to a connection state;

the transceiver is configured to receive and transmit data;

the processor is further configured to manage a bus architecture and common processings; and

the memory is configured to store data used by the processor in operation;

wherein generating the triggering message based on the identifier of the user equipment in the LC state comprises: generating, based on the identifier of the user equipment in the LC state, an enhanced paging message comprising the identifier of the user equipment in the LC state;

wherein generating, based on the identifier of the user equipment in the LC state, the enhanced paging message comprising the identifier of the user equipment in the LC state comprises: scrambling a downlink control channel using the identifier of the user equipment in the LC state as a scramble code, to generate the enhanced paging message; or, taking the identifier of the user equipment in the LC state as a content of a downlink shared channel, scrambling a downlink control channel using a preset scramble code, and performing a scheduling through the scrambled downlink control channel, to generate the enhanced paging message.

9. The base station according to claim 8 , wherein the processor is configured to send, via the transceiver, the triggering message to the user equipment in the LC state through a downlink control channel to recover the user equipment in the LC state from the LC state to the connection state.

10. The base station according to claim 9 , wherein the processor is configured to:

send, via the transceiver, the triggering message to the user equipment in the LC state through the downlink control channel in the shorter of a configured user equipment specific discontinuous reception (DRX) cycle and a DRX cycle comprised in a system broadcast; or

send, via the transceiver, the triggering message to the user equipment in the LC state through the downlink control channel in a DRX cycle comprised in a system broadcast; or

send, via the transceiver, the triggering message to the user equipment in the LC state through the downlink control channel in a configured user equipment specific DRX cycle.

11. The base station according to claim 8 , wherein the identifier of the user equipment in the LC state is configured by:

configuring a user equipment identifier for the user equipment in the LC state, when the base station configures the user equipment to enter the LC state; or

reconfiguring a user equipment identifier for the user equipment in the LC state, when the user equipment in the LC state moves from a first cell region to a second cell region;

wherein each of the first cell region and the second cell region comprises at least one cell.

12. The method for transmitting the downlink data according to claim 1 , wherein the enhanced paging message comprises an identifier of at least one user equipment in the LC state.

13. The method for transmitting the downlink data according to claim 6 , wherein after the recovering of the user equipment from the LC state to the connection state, the method for transmitting the downlink data further comprises: receiving, in the connection state, the downlink traffic data sent by the base station.

14. The base station according to claim 8 , wherein the enhanced paging message comprises an identifier of at least one user equipment in the LC state.

15. The base station according to claim 8 , wherein the processor is further configured to send, via the transceiver, the downlink traffic data to the user equipment recovered to the connection state.