Extended access barring mechanisms for machine type communications

1. A method, comprising:

defining first access class barring parameters, a first scaling factor for access class barring, and a second scaling factor for access class barring, wherein the first scaling factor and the second scaling factor are used to derive second access class barring parameters and third access class barring parameters; and

transmitting, by a base station, the first access class barring parameters, the first scaling factor and the second scaling factor to user equipment.

2. The method according to claim 1 , wherein

the first access class barring parameters are associated with user equipment belonging to a first category, the second access class barring parameters are associated with user equipment belonging to a second category and the third access class barring parameters are associated with user equipment belonging to a third category.

3. The method according to claim 1 , wherein

the access class barring parameters are access class barring factor and access class barring time.

4. A computer program product including a non-transitory computer readable medium, comprising software code portions for performing the method of claim 1 when the code portions are run on a processing device.

5. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code,

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:

define first access class barring parameters, a first scaling factor for access class barring, and a second scaling factor for access class barring, wherein the first scaling factor and the second scaling factor are used to derive second access class barring parameters and third access class barring parameters; and

transmit the first access class barring parameters, the first scaling factor and the second scaling factor to user equipment.

6. The apparatus according to claim 5 , wherein

the access class barring parameters are access class barring factor and access class barring time.

7. A method, comprising:

receiving at least one first access class barring parameter;

deriving at least one second access class barring parameter based on the at least one first access class barring parameters and a first scaling factor; and

deriving at least one third access class barring parameter based on the at least one first access class barring parameter, the first scaling factor and a second scaling factor.

8. The method according to claim 7 , wherein

receiving at least one first access parameter further comprises receiving a first access class barring parameter;

the first scaling factor is a predetermined first scaling factor;

deriving at least one second access class barring parameter further comprises deriving a second access class barring parameter based on the first access class barring parameter and the predetermined first scaling factor;

the second scaling factor is a predetermined second scaling factor;

deriving at least one third access class barring parameter further comprises deriving a third access class barring parameter based on the first access class barring parameter, the predetermined first scaling factor, and the predetermined second scaling factor.

9. The method according to claim 7 , wherein

there are a plurality of first, second, and third access barring parameters;

the plurality of first access class barring parameters are associated with user equipment belonging to a first category, the plurality of second access class barring parameters are associated with user equipment belonging to a second category and the plurality of third access class barring parameters are associated with user equipment belonging to a third category.

10. The method according to claim 9 , further comprising

determining, to which category the user equipment belongs, and

applying the respective access class barring parameters associated with the determined category.

11. The method according to claim 10 , further comprising, if it is determined that the user equipment belongs to more than one category,

applying the access class barring parameters associated with a predetermined one of the two or more categories among the categories to which the user equipment belongs.

12. The method according to claim 7 wherein

the at least one first, second, and third access class barring parameters comprise access class barring factor and access class barring time.

13. A computer program product including a non-transitory computer readable medium, comprising software code portions for performing the method of claim 7 when the code portions are run on a processing device.

14. The method of claim 7 , wherein:

receiving the at least one first access class barring parameter further comprises

receiving the first scaling factor and the second scaling factor;

deriving the at least one second access class barring parameter uses the received first scaling factor; and

deriving the at least one third access class barring parameter uses the received second scaling factor.

15. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code,

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:

receive at least one first access class barring parameter;

derive at least one second access class barring parameter based on the at least one first access class barring parameters and a first scaling factor; and

derive at least one third access class barring parameter based on the at least one first access class barring parameter, the first scaling factor and a second scaling factor.

16. The apparatus of claim 15 , wherein:

receiving the at least one first access class barring parameter further comprises

receiving the first scaling factor and the second scaling factor;

deriving the at least one second access class barring parameter uses the received first scaling factor; and

deriving the at least one third access class barring parameter uses the received second scaling factor.

17. The apparatus of claim 15 , wherein:

receiving at least one first access parameter further comprises receiving a first access class barring parameter;

the first scaling factor is a predetermined first scaling factor;

deriving at least one second access class barring parameter further comprises deriving a second access class barring parameter based on the first access class barring parameter and the predetermined first scaling factor;

the second scaling factor is a predetermined second scaling factor;

deriving at least one third access class barring parameter further comprises a third access class barring parameter based on the first access class barring parameter, the predetermined first scaling factor, and the predetermined second scaling factor.

18. The apparatus according to claim 15 , wherein

there are a plurality of first, second, and third access barring parameters;

the plurality of first access class barring parameters are associated with user equipment belonging to a first category, the plurality of second access class barring parameters are associated with user equipment belonging to a second category and the plurality of third access class barring parameters are associated with user equipment belonging to a third category.

19. The apparatus according to claim 18 , further comprising

determining, to which category the user equipment belongs, and

applying the respective access class barring parameters associated with the determined category.

20. The apparatus according to claim 19 , further comprising, if it is determined that the user equipment belongs to more than one category,

applying the access class barring parameters associated with a predetermined one of the two or more categories among the categories to which the user equipment belongs.

21. The apparatus according to claim 15 , wherein

the at least one first, second, and third access class barring parameters comprise access class barring factor and access class barring time.