Random access improvement

1. A method, comprising:

identifying, with a mobile device, an access class of a plurality of access classes to access a wireless network, the identified access class having an access service class of 0;

determining a persistence value of the identified access class, wherein the persistence value is determined based on a persistence formula, wherein the persistence formula is using a persistence scaling factor, wherein the persistence scaling factor is using a scaling function to scale the value from the persistence formula, and wherein the persistence scaling factor is based at least in part on a level of usage of at least one access channel of the wireless network, and wherein higher levels of usage correspond to higher values produced by the scaling function and lower levels of usage correspond to lower values produced by the scaling function; and

using the determined persistence value of the identified access class to enable the access to the wireless network, wherein the determined persistence value of the identified access class is a value other than 1.

2. The method according to claim 1 , wherein the persistence value is determined using a scaling factor of at least one scaling factor tabulated in a message received from the wireless network.

3. The method according to claim 1 , wherein the persistence scaling factor is using a monotonically decreasing scaling function that decreases from the identified access class to a lowest priority access class multiplied by the value from the persistence formula.

4. The method according to claim 1 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =1−0.125i, with i being an index of an individual one of the plurality of access classes.

5. The method according to claim 1 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =1−0.1i, with i being an index of an individual one of the plurality of access classes.

6. The method according to claim 1 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =2 −i , with i being an index of an individual one of the plurality of access classes.

7. The method according to claim 1 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =2 −0.5i , with i being an index of an individual one of the plurality of access classes.

8. The method according to claim 1 , wherein the mobile device comprises a user equipment of the wireless network.

9. The method according to claim 1 , wherein the access uses a wideband code division multiple access random access channel.

10. The method according to claim 1 , wherein the persistence value is determined by multiplying the scaled value by a value of an access service class scaling factor determined for the identified access class based on a corresponding index of the identified access class from indices corresponding to the plurality of access classes.

11. The method according to claim 1 , wherein identifying the access class comprises identifying an access class to access service class mapping of a broadcast channel.

12. A non-transitory computer readable storage medium storing computer program code, the computer program code executable by a at least one processor to perform the method according to claim 1 .

13. An apparatus comprising:

at least one processor; and

at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least:

identify an access class of a plurality of access classes to access a wireless network, the identified access class having an access service class of 0;

determine a persistence value of the identified access class, wherein the persistence value is determined based on a persistence formula, wherein the persistence formula is using a scaling function using a persistence scaling factor, wherein the persistence scaling factor is used to scale the value from the persistence formula, and wherein the persistence scaling factor is based at least in part on a level of usage of at least one access channel of the wireless network, and wherein higher levels of usage correspond to higher values produced by the scaling function and lower levels of usage correspond to lower values produced by the scaling function; and

use the determined persistence value of the identified access class to enable the access to the wireless network, wherein the determined persistence value of the identified access class is a value other than 1.

14. The apparatus according to claim 13 , wherein the persistence value is determined using a scaling factor of at least one scaling factor tabulated in a message received from the wireless network.

15. The apparatus according to claim 13 , wherein the persistence scaling factor is using a monotonically decreasing scaling function that decreases from the identified access class to a lowest priority access class multiplied by the value from the persistence formula.

16. The apparatus according to claim 13 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =1−0.125i, with i being an index of an individual one of the plurality of access classes.

17. The apparatus according to claim 13 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =1−0.1i, with i being an index of an individual one of the plurality of access classes.

18. The apparatus according to claim 13 , wherein the persistence scaling factor is using a monotonically decreasing function of c i =2 −i , with i being an index of an individual one of the plurality of access classes.

19. The apparatus according to claim 13 , wherein the persistence scaling factor is determined using a monotonically decreasing function of c i =2 −0.5i , with i being an index of an individual one of the plurality of access classes.

20. The apparatus according to claim 13 , wherein the apparatus comprises a user equipment of the wireless network.

21. The apparatus according to claim 13 , wherein the access uses a wideband code division multiple access random access channel.

22. The apparatus according to claim 13 , wherein the persistence value is determined by multiplying the scaled value by a value of an access service class scaling factor determined for the identified access class based on a corresponding index of the identified access class from indices corresponding to the plurality of access classes.

23. The apparatus according to claim 13 , wherein identifying the access class uses an access service class mapping of a broadcast channel.