Energy-saving control method and device for cell in heterogeneous system

1. An energy-saving control method for a cell in a heterogeneous system, comprising:

receiving, by an access control device of a serving cell, a service request of a multi mode user equipment (UE); and

when a radio resource of the serving cell cannot satisfy the service request of the multi mode UE, and if the access control device of the serving cell determines that a heterogeneous system neighboring cell of the serving cell is in an energy-saving state, sending, by the access control device of the serving cell, an exit energy-saving state request message to an access control device of the heterogeneous-system neighboring cell, wherein the exit energy-saving state request message is used to request the heterogeneous-system neighboring cell to exit the energy-saving state;

sending, by the access control device of the serving cell, instruction information to the multi-mode UE, wherein the instruction information is one of an RRC connection setup reject message and a radio access bearer assignment response message, and includes a wait time for the multi-mode UE to redirect to the heterogeneous-system neighboring cell after exiting the energy-saving state, the wait time being greater than or equal to time for the heterogeneous-system neighboring cell to exit the energy-saving state, and the wait time is used to instruct the multi-mode UE to, when the wait time is due, redirect to the heterogeneous system neighboring cell to request for a service.

2. The method according to claim 1 , wherein the exit energy-saving state request message carries an identifier of the access control device of the heterogeneous-system neighboring cell in the energy-saving state, an identifier of the heterogeneous-system neighboring cell in the energy-saving state, and a type of an operation to be performed.

3. The method according to claim 1 , further comprising:

receiving, by the access control device of the serving cell, an exit energy-saving state response message returned by the access control device of the heterogeneous-system neighboring cell, wherein the exit energy-saving state response message carries time for the heterogeneous-system neighboring cell to exit the energy-saving state.

4. The method according to claim 1 , wherein:

the receiving, by an access control device of a serving cell, a service request of a multi-mode user equipment UE comprises: receiving, by the access control device of the serving cell, a radio resource control (RRC) connection setup request sent by the multi-mode UE; and the instruction information is comprised in an RRC connection setup reject message sent by the access control device of the serving cell to the multi-mode UE; or

the receiving, by an access control device of a serving cell, a service request of a multi-mode UE comprises: receiving, by the access control device of the serving cell, a radio access bearer assignment request sent by a core network device, wherein the radio access bearer assignment request comprises the service request of the multi-mode UE; and the instruction information is comprised in a radio access bearer assignment response message sent by the access control device of the serving cell to the core network device.

5. An access control device, wherein the access control device comprises:

a receiver, configured to receive a service request of a multi-mode user equipment (UE); and

a transmitter, configured to send, when a radio resource of a serving cell cannot satisfy the service request of the multi-mode UE, and after it is determined that a heterogeneous system neighboring cell of the serving cell is in an energy-saving state, an exit energy-saving state request message to an access control device of the heterogeneous-system neighboring cell, wherein the exit energy-saving state request message is used to request the heterogeneous-system neighboring cell to exit the energy-saving state;

the transmitter, configured to send instruction information to the multi-mode UE, wherein the instruction information is one of an RRC connection setup reject message and a radio access bearer assignment response message, and includes a wait time for the multi-mode UE to redirect to the heterogeneous-system neighboring cell after exiting the energy-saving state, the wait time being greater than or equal to time for the heterogeneous system neighboring cell to exit the energy-saving state, and the wait time is used to instruct the multi-mode UE to, when the wait time is due, redirect to the heterogeneous-system neighboring cell to request for a service.

6. The access control device according to claim 5 , wherein the exit energy-saving state request message carries an identifier of the access control device of the heterogeneous-system neighboring cell in the energy-saving state, an identifier of the heterogeneous-system neighboring cell in the energy-saving state, and a type of an operation to be performed.

7. The access control device according to claim 5 , wherein:

the receiver, further configured to receive an exit energy-saving state response message returned by the access control device of the heterogeneous-system neighboring cell, wherein the exit energy-saving state response message carries time for the heterogeneous-system neighboring cell to exit the energy-saving state.

8. The access control device according to claim 5 , wherein:

the receiver is configured to receive an RRC connection setup request sent by the multi-mode UE; and the transmitter is further configured to send an RRC connection setup reject message to the multi-mode UE, wherein the RRC connection setup reject message comprises the instruction information; or

the receiver is configured to receive a radio access bearer assignment request sent by a core network device, wherein the radio access bearer assignment request comprises the service request of the multi-mode UE; and the transmitter is further configured to send a radio access bearer assignment response message to the core network device, wherein the radio access bearer assignment response message comprises the instruction information.