Method and apparatus for transmitting CSG information

1. A method for transmitting Closed Subscriber Group (CSG) information, comprising:

obtaining, by a base station, CSG reporting configuration information; and

determining, by the base station, a CSG information reporting condition is met according to the CSG reporting configuration information, and transmitting CSG information of a cell in which a User Equipment (UE) is located to a mobility management entity, wherein the cell belongs to the base station, the CSG information of the cell comprises any one or any combination of: CSG ID, cell mode, and CSG member status, and wherein the CSG ID is an identifier of the cell and the CSG member status is a membership status of the UE in the cell in which the UE is located;

wherein the CSG reporting configuration information comprises: reporting the CSG information to the mobility management entity when CSG ID changes, or, reporting the CSG information to the mobility management entity when CSG member status changes;

wherein the determining that the CSG information reporting condition is met according to the CSG reporting configuration information comprises:

if the CSG reporting configuration information is reporting when CSG ID changes, determining, by the base station, the CSG information reporting condition is met if a handover between cells with different CSG IDs within the base station happens to the UE; and

if the CSG reporting configuration information is reporting when CSG member status changes, determining, by the base station, the CSG information reporting condition is met if an inter-CSG cell handover within the base station which results in change of a member status happens to the UE.

2. The method of claim 1 , wherein the obtaining the CSG reporting configuration information comprises:

receiving, by the base station, the CSG reporting configuration information from the mobility management entity.

3. The method of claim 1 , wherein transmitting the CSG information of the cell where the UE is located to the mobility management entity comprises:

transmitting, by the base station, the CSG information of the cell where the UE is located to the mobility management entity via an S1 Application Protocol (S1AP) message.

4. A method for transmitting Closed Subscriber Group (CSG) information, comprising:

receiving, by a mobility management entity, CSG information of a cell that a User Equipment (UE) is located reported by a base station when the base station determines that a CSG information reporting condition is met according to CSG reporting configuration information; wherein the cell belongs to the base station; the CSG information of the cell comprises any one or any combination of: CSG ID, cell mode, and CSG member status; wherein the CSG ID is an identifier of the cell, the CSG member status is a membership status of the UE in the cell in which the UE is located;

wherein the CSG reporting configuration information comprises: reporting the CSG information to the mobility management entity when CSG ID changes, or, reporting the CSG information to the mobility management entity when CSG member status changes;

if the CSG reporting configuration information is reporting when CSG ID changes, determining, by the base station, the CSG information reporting condition is met if a handover between cells with different CSG IDs within the base station happens to the UE; and

if the CSG reporting configuration information is reporting when CSG member status changes, determining, by the base station, the CSG information reporting condition is met if an inter-CSG cell handover within the base station which results in change of a member status happens to the UE.

5. The method of claim 4 , further comprising:

before the mobility management entity receives the CSG information, transmitting, by the mobility management entity, the CSG reporting configuration information to the base station.

6. The method of claim 5 , wherein the transmitting the CSG reporting configuration information to the base station comprises:

after a network side enables a CSG information reporting function, transmitting, by the mobility management entity, the CSG reporting configuration information to the base station.

7. The method of claim 5 , wherein the transmitting the CSG reporting configuration information to the base station comprises:

transmitting, by the mobility management entity, the CSG reporting configuration information to the base station via an S1 Application Protocol (S1AP) message.

8. A base station, comprising:

one or more processors;

memory; and

one or more program modules stored in the memory and to be executed by the one or more processors, the one or more program modules including:

an obtaining module, adapted to obtain Closed Subscriber Group (CSG) reporting configuration information;

a determining module, adapted to determine that a CSG information reporting condition is met according to the CSG reporting configuration information; and

a transmitting module, adapted to transmit CSG information of a cell that a User Equipment (UE) is located to a mobility management entity;

wherein the cell belongs to the base station; the CSG information of the cell comprises any one or any combination of: CSG ID, cell mode, and CSG member status; wherein the CSG ID is an identifier of the cell, the CSG member status is a membership status of the UE in the cell in which the UE is currently located;

wherein the CSG reporting configuration information comprises: reporting the CSG information to the mobility management entity when CSG ID changes, or, reporting the CSG information to the mobility management entity when CSG member status changes;

the determining module is further adapted to

if the CSG reporting configuration information is reporting when CSG ID changes, determine the CSG information reporting condition is met if a handover between cells with different CSG IDs within the base station happens to the UE; and

if the CSG reporting configuration information is reporting when CSG member status changes, determine the CSG information reporting condition is met if an inter-CSG cell handover within the base station which results in change of a member status happens to the UE.

9. The base station of claim 8 , wherein the obtaining module is further adapted to receive the CSG reporting configuration information from the mobility management entity.