Method and apparatus for increasing communication effectiveness of terminal in power-saving mode

1. A method by a user equipment (UE) for communicating, the method comprising:

transmitting, to a mobility management entity (MME), a first message for requesting an operation in a power saving mode and for requesting transmission and reception of a message for the UE by a network entity in case that the UE operates in the power saving mode;

receiving, from the MME, a second message including information indicating availability of the power saving mode and at least one parameter for the power saving mode, based on the first message;

transmitting, to the network entity, a third message including information on a timer and information for requesting the transmission and reception of the message instead of the UE in case that the timer is expired; and

operating in the power saving mode based on the second message.

2. The method of claim 1 , wherein the first message includes information regarding at least one of a duration of the power saving mode of the UE, an active timer, and an active flag.

3. The method of claim 1 ,

wherein the third message further includes at least one of information indicating that the UE operates in the power saving mode, information indicating a duration of the power saving mode of the UE, and information indicating a radio access technology (RAT) to which the UE is connected.

4. The method of claim 1 , further comprising:

transmitting, to the network entity, a fourth message including information on an external identity (ID) of the UE,

wherein, the external ID of the UE is stored by the network entity, and if a fifth message is received by the network entity from a server, the network entity compares the external ID of the UE with an address of the fifth message, and, if the external ID of the UE corresponds to the address of the fifth message, a response message is transmitted by the network entity to the server.

5. A method by a mobility management entity (MME) for communicating, the method comprising:

receiving, from a user equipment (UE), a first message for requesting an operation in a power saving mode and for requesting transmission and reception of a message for the UE by a network entity if the UE operates in the power saving mode;

transmitting, to the UE, a second message including information indicating availability of the power saving mode and at least one parameter for the power saving mode, based on the first message; and

transmitting, to a home subscriber server (HSS), information for requesting the network entity to transmit and receive for the UE, if the UE operates in the power saving mode,

wherein a third message including information on a timer and information for requesting the transmission and reception of the message instead of the UE in case that the timer is expired is transmitted from the UE to the network entity.

6. The method of claim 5 , wherein the first message includes information regarding at least one of a duration of the power saving mode of the UE, an active timer, and an active flag.

7. A method by a service capability server (SCS) for communicating, the method comprising:

receiving, from a user equipment (UE), a first message including information on a timer and information for requesting transmission and reception of a message instead of the UE in case that the timer is expired, if the UE operates in a power saving mode; and

transmitting and receiving the message for the UE to and from a server, if the UE operates in the power saving mode.

8. The method of claim 7 , further comprising:

receiving, from the UE, a second message including information on an external identity (ID) of the UE;

storing the external ID of the UE;

comparing, if a third message is received from a server, the external ID of the UE with an address of the third message; and

transmitting, to the server, a response message, if the external ID of the UE corresponds to the address of the third message.

9. A user equipment (UE) comprising:

a communicator; and

a controller coupled with the communicator and configured to:

control the communicator to transmit, to a mobility management entity (MME), a first message for requesting an operation in a power saving mode and for requesting transmission and reception of a message for the UE by a network entity in case that the UE operates in the power saving mode,

control the communicator to receive, from the MME, a second message including information indicating availability of the power saving mode and at least one parameter for the power saving mode, based on the first message,

control the communicator to transmit, to the network entity, a third message including information on a timer and information for requesting the transmission and reception of the message instead of the UE in case that the timer is expired, and

operate in the power saving mode based on the second message.

10. The user equipment of claim 9 , wherein the first message includes information regarding at least one of a duration of the power saving mode of the UE, an active timer, and an active flag.

11. The user equipment of claim 9 , wherein the third message further includes at least one of information indicating that the UE operates in the power saving mode, information indicating a duration of the power saving mode of the UE, and information indicating a radio access technology (RAT) to which the UE is connected.

12. The user equipment of claim 9 ,

wherein the controller is further configured to:

control the communicator to transmit, to the network entity, a fourth message including information on an external identity (ID) of the UE, and

wherein, the external ID of the UE is stored by the network entity, and if a fifth message is received by the network entity from a server, the network entity compares the external ID of the UE with an address of the fifth message, and, if the external ID of the UE corresponds to the address of the fifth message, a response message is transmitted by the network entity to the server.

13. A mobility management entity (MME) comprising:

a communicator; and

a controller coupled with the communicator and configured to control the communicator to:

receive, from a user equipment (UE), a first message for requesting an operation in a power saving mode and for requesting transmission and reception of a message for the UE by a network entity if the UE operates in the power saving mode,

transmit, to the UE, a second message including information indicating availability of the power saving mode and at least one parameter for the power saving mode, based on the first message, and

transmit, to a home subscriber server (HSS), information for requesting the network entity to transmit and receive for the UE, if the UE operates in the power saving mode,

wherein a third message including information on a timer and information for requesting the transmission and reception of the message instead of the UE in case that the timer is expired is transmitted from the UE to the network entity.

14. The mobility management entity of claim 13 , wherein the first message includes information regarding at least one of a duration of the power saving mode of the UE, an active timer, and an active flag.

15. A service capability server (SCS) comprising:

a communicator; and

a controller coupled with the communicator and configured to control the communicator to:

receive, from a user equipment (UE), a first message including information on a timer and information for requesting transmission and reception of a message instead of the UE in case that the timer is expired, if the UE operates in a power saving mode, and

transmit and receive the message for the UE to and from a server, if the UE operates in the power saving mode.

16. The service capability server of claim 15 , wherein the controller is further configured to:

control the communicator to receive, from the UE, a second message including information on an external identity (ID) of the UE,

store the external ID of the UE,

compare, if a third message is received from a server, the external ID of the UE with an address of the third message, and

control the communicator to transmit, to the server, a response message, if the external ID of the UE corresponds to the address of the third message.