METHOD AND APPARATUS FOR NOTIFYING ACCESS CONTROL INFORMATION

• US 20130115913A1
• Filed: 10/23/2012
• Published: 05/09/2013
• Est. Priority Date: 11/09/2011
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lin, Jung-Mao, Chiu, Chun-Yuan
• Granted Patent: US 8,942,091 B2
• Time in Patent Office: Days
• US Class Current: 455/410
• CPC Class Codes: H04L 47/122 by diverting traffic away from congested entities
• CPC Class Codes: H04W 4/50 Service provisioning or reconfiguring
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and an apparatus for notifying activations of extended access barring (EAB) and updates of EAB information in the field of Long Term Evolution (LTE) wireless communication systems have been proposed. In accordance with the present disclosure, the eNB notifies MTC devices of EAB changes from a paging message through the paging channel (PCH). The network could use either a single bit EAB status indicator to notify whether the EAB has been enabled or disabled or use multiple bits EAB indicator to represent different EAB parameter changes in addition to whether the EAB has been enabled or disabled. Based on the present disclosure, the network could reduce the paging overhead by require the MTC device to acquire the EAB-SIB only when it needs the EAB information.

Claims

1. A method of performing access control, adapted to a base station (BS) and the method comprising:

activating an access control mechanism for a specific access class;

indicating activating the access control mechanism by an indicator in a paging message;

disabling the access control mechanism for the specific access class; and

indicating disabling the access control mechanism by an indicator in a paging message.

2. The method of claim 1, wherein the indicator indicates a first state and a second state wherein one of the first state and the second state indicates the activation of the access control mechanism, and the other one indicates the disablement of the access control mechanism.

3. The method of claim 2, wherein the indicator further indicates additional states for whether an access control parameter has been changed.

4. The method of claim 3, wherein the indicator comprises at least two bits representing at least the first state, the second state, a third state, and a fourth state.

5. The method of claim 4, wherein one of the four access control states indicates the activation of access control mechanism, and the other three indicate the disablement of the access control mechanism.

6. The method of claim 5, wherein the other three states indicate a change in the access control parameter by changing the indicator from one of the other three states to another one of the other three states.

7. The method of claim 1, wherein the access control mechanism is extended access barring (EAB) mechanism of a communication system.

8. A method for notifying parameter changes of an access control mechanism, adapted for a user equipment (UE) belonging to a specific access class, and the method comprising:

receiving a paging message which contains an indicator indicating an access control mechanism is activated;

acquiring a parameter of the access control mechanism until an access to the wireless communication network is needed; and

receiving another paging message which contains an indicator indicating the access control mechanism is disabled.

9. The method of claim 8, wherein the indicator indicates a first state and a second state wherein one of the first state and the second state indicates the activation of the access control mechanism, and the other one indicates the disablement of the access control mechanism.

10. The method of claim 8 further comprising:

acquiring the parameter of the access control mechanism when the access to the wireless communication network is needed; and

re-acquiring the parameter of the access control mechanism every a first predetermined period.

11. The method of claim 9, wherein the indicator further indicates additional states for whether an access control parameter has been changed.

12. The method of claim 11, wherein the indicator comprises at least two bits representing at least the first state, the second state, a third state, and a fourth state.

13. The method of claim 12, wherein one of the four access control states indicates the activation of access control mechanism, and the other three indicate the disablement of the access control mechanism.

14. The method of claim 12, wherein the other three states indicate a change in the access control parameter by changing the indicator from one of the other three states to another one of the other three states.

15. The method of claim 12 further comprising:

obtaining the access control parameter after the indicator is changed from one of the other states to another one of the other three states.

16. The method of claim 11 further comprising:

if the access to the communication network is needed, acquiring the parameter of the access control mechanism; and

determining whether the UE is barred by the access control mechanism.

17. The method of claim 16 further comprising:

if the UE is barred by the access control mechanism,

waiting for a second predetermined period before re-acquiring the parameter of the access control mechanism;

or

re-acquiring the parameter of the access control mechanism when the indicator indicating the access control parameter has been changed.

18. Abase station (BS) comprising:

a transceiver configured to transmit and receive wireless signals; and

a processor coupled to the transceiver and configured for activating or disabling an access control mechanism for a specific access class and for transmitting a paging message which comprises an indicator indicating whether the access control mechanism is activated or disabled.

19. The base station of claim 18, wherein the indicator consists of a first state and a second state wherein one of the first state and the second state indicates the activation of the access control mechanism, and the other one indicates the disablement of the access control mechanism.

20. The base station of claim 18, wherein the indicator further indicates whether an access control parameter has been changed.

21. The base station of claim 19, wherein the indicator comprises at least two bits representing four different access control states.

22. The base station of claim 21, wherein one of the four access control states indicates the activation of access control mechanism, and the other three indicate the disablement of the access control mechanism.

23. The base station of claim 22, wherein the other three states indicate a change in the access control parameter by changing the indicator from one of the other three states to another one of the other three states.

24. The base station of claim 18 wherein the processor is further configured for:

configuring an access control parameter of the access control mechanism in a system information block;

broadcasting the system information block periodically; and

disabling the access control mechanism.

25. The base station of claim 18, wherein the access control mechanism is extended access barring (EAB) mechanism.

26. A user equipment (UE) belonging to a specific access class, comprising:

a transceiver for transmitting and receiving wireless signals;

a processor coupled to the transceiver and configured for;

receiving a paging message which comprises an indicator indicating whether an access control mechanism is activated or disabled and for acquiring a parameter of the access control mechanism when an access to wireless communication network is needed.

27. The UE of claim 26, wherein the indicator consists of a first state and a second state wherein one of the first state and the second state indicates the activation of the access control mechanism, and the other one indicates the disablement of the access control mechanism.

28. The UE of claim 26 further comprising:

acquiring an access control parameter after the indicator indicating the activation of the access control mechanism; and

re-acquiring the access control parameter every a predetermined period.

29. The UE of claim 26, wherein the indicator further indicates whether an access control parameter has been changed.

30. The UE of claim 29, wherein the indicator comprises at least two bits representing four different access control states.

31. The UE of claim 30, wherein one of the four access control states indicates the activation of access control mechanism, and the other three indicate the disablement of the access control mechanism.

32. The UE of claim 31, wherein the other three states indicate a change in the access control parameter by changing the indicator from one of the other three states to another one of the other three states.

33. The UE of claim 29, wherein the processor is further configured for:

if the access to the wireless communication network is needed,

acquiring the parameter of the access control mechanism; and

determining whether the UE is barred by the access control mechanism.

34. The UE of claim 33, wherein the processor further configured for:

if the UE is barred by the access control mechanism, waiting for a second predetermined period before re-acquiring the parameter of the access control mechanism;

or

re-acquiring the parameter of the access control mechanism when the indicator indicating the access control parameter has been changed.