Method for controlling access in wireless communication system and apparatus for supporting same

1. A method for an access control performed by a terminal in a wireless communication system, the method comprising:

obtaining service specific access control information;

obtaining service group access control information; and

performing an access control for a specific type of a service on the basis of the service group access control information and the service specific access control information,

wherein the service specific access control information includes a service specific barring factor parameter applied to the specific type of the service, and

wherein the service group access control information includes a service group barring factor parameter applied commonly to a specific service group including at least one type of the service.

2. The method of claim 1 , wherein the performing of the access control comprises, if the specific type of the service is included in the specific service group, determining whether an access to the specific service is allowed by applying the service specific barring factor parameter and the service group barring factor parameter.

3. The method of claim 2 , wherein the determining of whether the access is allowed comprises:

calculating a survival rate by using a value of the service specific barring factor parameter and a value of the service group barring factor parameter; and

if a randomly drawn value within a uniformly distributed range is less than the survival rate, determining that the access to the specific service is allowed.

4. The method of claim 2 , wherein the performing of the access control further comprises, if the specific type of the service is not included in the specific service group, determining whether the access to the specific service is not allowed by applying the service specific barring factor parameter without having to apply the service group barring factor parameter.

5. The method of claim 4 , wherein the determining of whether the access is allowed comprises:

calculating a survival rate by using a value of the service specific barring factor parameter; and

if a randomly drawn value within a uniformly distributed range is less than the survival rate, determining that the access to the specific service is allowed.

6. The method of claim 1 , wherein the performing of the access control comprises, if the specific type of the service is included in the specific service group, determining whether an access to a specific service is allowed by applying the service group barring factor parameter without having to apply the service specific barring factor parameter.

7. The method of claim 6 , wherein the determining of whether the access is allowed comprises:

calculating a survival rate by using a value of the service group barring factor parameter; and

if a randomly drawn value within a uniformly distributed range is less than the survival rate, determining that the access to the specific service is allowed.

8. The method of claim 6 , wherein the performing of the access control comprises, if the specific type of service is included in the specific service group, determining whether the access to the specific service is allowed by applying the service specific barring factor parameter without having to apply the service group barring factor parameter.

9. The method of claim 8 , wherein the determining of whether the access is allowed comprises:

calculating a survival rate by using a value of the service specific barring factor parameter; and

if a randomly drawn value within a uniformly distributed range is less than the survival rate, determining that the access to the specific service is allowed.

10. The method of claim 1 , further comprising receiving service grouping information, wherein the service grouping information indicates a relation between the specific service and the specific service group.

11. The method of claim 1 , wherein access class barring information based on an access class allowed to the terminal is additionally applied to an access control for the specific service.

12. A wireless apparatus operating in a wireless communication system, the apparatus comprising:

a radio frequency (RF) unit for transmitting and receiving a radio signal; and

a processor operatively coupled to the RF unit, wherein the processor is configured for:

obtaining service specific access control information;

obtaining service group access control information; and

performing an access control for a specific type of a service on the basis of the service group access control information and the service specific access control information,

wherein the service specific access control information includes a service specific barring factor parameter applied to the specific type of the service, and

wherein the service group access control information includes a service group barring factor parameter applied commonly to a specific service group including at least one type of the service.

13. A method of controlling an access performed by a terminal in a wireless communication system, the method comprising:

obtaining service specific access control information applied to a specific type service;

obtaining default service group access control information; and

performing an access control for the specific type service on the basis of the service specific access control information and the default service group access control information,

wherein the service specific access control information includes a service specific barring factor parameter applied to the specific type service, and

wherein the default service group access control information is information applied to a service group which is not grouped by a network, and the service group includes the specific type service.

14. The method of claim 13 , wherein the default service group access control information is pre-set in the terminal.