Method of Handling Resource Allocation for MTC and Related Communication Device

• US 20130114537A1
• Filed: 11/07/2012
• Published: 05/09/2013
• Est. Priority Date: 11/08/2011
• Status: Active Grant

• Current Assignee: Acer, Inc.
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lee, Chien-Min
• Granted Patent: US 9,131,468 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method of performing a random access (RA) procedure for a communication device in a wireless communication system is disclosed. The method comprises receiving first system information transmitted in a first subband resource of at least one subband resource by a network of the wireless communication system when performing a cell search procedure; receiving second system information transmitted in a second subband resource of the at least one subband resource according to the first system information, after performing the cell search procedure; and performing the RA procedure by using the second subband resource of the at least one subband resource according to at least one of the first system information and the second system information.

Claims

1. A method of performing a random access (RA) procedure for a communication device in a wireless communication system, the method comprising:

receiving first system information transmitted in a first subband resource of at least one subband resource by a network of the wireless communication system when performing a cell search procedure;

receiving second system information transmitted in a second subband resource of the at least one subband resource according to the first system information, after performing the cell search procedure; and

performing the RA procedure by using the second subband resource of the at least one subband resource according to at least one of the first system information and the second system information.

2. The method of claim 1, wherein each of the at least one subband resource is a division of physical resource managed by the network, and comprises at least one resource block (RB) in a corresponding subband.

3. The method of claim 1, wherein the communication device is a machine type communication (MTC) device.

4. The method of claim 1, wherein the first system information and the second system information comprise at least one of a carrier frequency of the second subband resource, a bandwidth of the second subband resource, types of applications supported in the second subband resource, antenna information, EAB (extended access barring) information, a physical random access channel (PRACH) resource configuration, a physical downlink shared channel (PDSCH) resource configuration, a physical downlink control channel (PDCCH) resource configuration, a physical uplink shared channel (PUSCH) resource configuration and a physical uplink control channel (PUCCH) resource configuration.

5. The method of claim 1, wherein the first subband resource is used by the network for transmitting a physical broadcast channel (PBCH) to a legacy user equipment (UE) in the wireless communication system.

6. The method of claim 1, further comprising:

switching a carrier frequency of the communication device from a carrier frequency of the first subband resource to a carrier frequency of the second subband resource according to the first system information, before receiving the second system information, when the second subband resource is not in a maximum bandwidth supported by the communication device.

7. The method of claim 1, further comprising:

performing the RA procedure by using a third subband resource of the at least one subband resource, when the RA procedure is not performed successfully by using the second subband resource.

8. The method of claim 7, wherein the RA procedure is performed by using the third subband resource, when the RA procedure is not performed successfully by using the second subband resource for a predetermined amount of times.

9. The method of claim 7, wherein the RA procedure is performed by using the third subband resource, when the RA procedure is not performed successfully by using the second subband resource within a predetermined time interval.

10. The method of claim 7, wherein the RA procedure is performed by using the third subband resource, when the communication device receives a signaling in the second subband resource indicating that the second subband resource is congested.

11. The method of claim 7, wherein the communication device selects the third subband resource according to a random selection.

12. The method of claim 7, wherein the third subband resource is not in a maximum bandwidth supported by the communication device, and the method further comprises:

switching a carrier frequency of the communication device from a carrier frequency of the second subband resource to a carrier frequency of the third subband resource, before performing the RA procedure by using the third subband resource.

13. A method of performing machine type communication (MTC) for a communication device in a wireless communication system, the method comprising:

performing a first MTC with a network of the wireless communication system by using a first subband resource of at least one subband resource; and

performing a second MTC with the network by using a second subband resource of the at least one subband resource, after performing the first MTC.

14. The method of claim 13, wherein each of the at least one subband resource is a division of physical resource managed by the network, and comprises at least one resource block (RB) in a corresponding subband.

15. The method of claim 13, wherein the communication device is a MTC device.

16. The method of claim 13, further comprising:

switching a carrier frequency of the communication device from a carrier frequency of the first subband resource to a carrier frequency of the second subband resource, before performing the second MTC with the network, when the second subband resource is not in a maximum bandwidth supported by the communication device.

17. The method of claim 13, wherein the first subband resource and the second subband resource are activated resources.

18. The method of claim 13, wherein the communication device selects and switches to the second subband resource according to at least one of a higher layer signaling transmitted by the network, a random selection, an application type performed by the communication device, capability of the communication device and a subband configuration transmitted by the network.

19. The method of claim 18, further comprising:

replying an acknowledgement corresponding to the higher layer signaling to the network within a predetermined time interval, after receiving the higher layer signaling.

20. The method of claim 13, wherein the communication device performs a cell search procedure when performing the first MTC, and performs a random access (RA) procedure when performing the second MTC.

21. The method of claim 20, further comprising:

performing a third MTC with the network by using the first subband resource, after performing the second MTC.

22. The method of claim 13, wherein the communication device performs a RA procedure when performing the first MTC, and transmits or receives data when performing the second MTC.

23. A communication device in a wireless communication system for performing a random access (RA) procedure, the communication device comprising:

means for receiving first system information transmitted in a first subband resource of at least one subband resource by a network of the wireless communication system when performing a cell search procedure;

means for receiving second system information transmitted in a second subband resource of the at least one subband resource according to the first system information, after performing the cell search procedure; and

means for performing the RA procedure by using the second subband resource of the at least one subband resource according to at least one of the first system information and the second system information.

24. The communication device of claim 23, wherein each of the at least one subband resource is a division of physical resource managed by the network, and comprises at least one resource block (RB) in a corresponding subband.

25. The communication device of claim 23, wherein the communication device is a machine type communication (MTC) device.

26. The communication device of claim 23, wherein the first system information and the second system information comprise at least one of a carrier frequency of the second subband resource, a bandwidth of the second subband resource, types of applications supported in the second subband resource, antenna information, extended access barring (EAB) information, a physical random access channel (PRACH) resource configuration, a physical downlink shared channel (PDSCH) resource configuration, a physical downlink control channel (PDCCH) resource configuration, a physical uplink shared channel (PUSCH) resource configuration and a physical uplink control channel (PUCCH) resource configuration.

27. The communication device of claim 23, wherein the first subband resource is used by the network for transmitting a physical broadcast channel (PBCH) to a legacy user equipment (UE) in the wireless communication system.

28. The communication device of claim 23, further comprising:

means for switching a carrier frequency of the communication device from a carrier frequency of the first subband resource to a carrier frequency of the second subband resource according to the first system information, before receiving the second system information, when the second subband resource is not in a maximum bandwidth supported by the communication device.

29. The communication device of claim 23, further comprising:

means for performing the RA procedure by using a third subband resource of the at least one subband resource, when the RA procedure is not performed successfully by using the second subband resource.

30. The communication device of claim 29, wherein the RA procedure is performed by using the third subband resource, when the RA procedure is not performed successfully by using the second subband resource for a predetermined amount of times.

31. The communication device of claim 29, wherein the RA procedure is performed by using the third subband resource, when the RA procedure is not performed successfully by using the second subband resource within a predetermined time interval.

32. The communication device of claim 29, wherein the RA procedure is performed by using the third subband resource, when the communication device receives a signaling in the second subband resource indicating that the second subband resource is congested.

33. The communication device of claim 29, wherein the communication device selects the third subband resource according to a random selection.

34. The communication device of claim 29, wherein the third subband resource is not in a maximum bandwidth supported by the communication device, and the communication device further comprises:

means for switching a carrier frequency of the communication device from a carrier frequency of the second subband resource to a carrier frequency of the third subband resource, before performing the RA procedure by using the third subband resource.

35. A communication device in a wireless communication system for performing machine type communication (MTC), the communication device comprising:

means for performing a first MTC with a network of the wireless communication system by using a first subband resource of at least one subband resource; and

means for performing a second MTC with the network by using a second subband resource of the at least one subband resource, after performing the first MTC.

36. The communication device of claim 35, wherein each of the at least one subband resource is a division of physical resource managed by the network, and comprises at least one resource block (RB) in a corresponding subband.

37. The communication device of claim 35, wherein the communication device is a MTC device.

38. The communication device of claim 35, further comprising:

means for switching a carrier frequency of the communication device from a carrier frequency of the first subband resource to a carrier frequency of the second subband resource, before performing the second MTC with the network, when the second subband resource is not in a maximum bandwidth supported by the communication device.

39. The communication device of claim 35, wherein the first subband resource and the second subband resource are activated resources.

40. The communication device of claim 35, wherein the communication device selects and switches to the second subband resource according to at least one of a higher layer signaling transmitted by the network, a random selection, an application type performed by the communication device, capability of the communication device and a subband configuration transmitted by the network.

41. The communication device of claim 40, further comprising:

means for replying an acknowledgement corresponding to the higher layer signaling to the network within a predetermined time interval, after receiving the higher layer signaling.

42. The communication device of claim 35, wherein the communication device performs a cell search procedure when performing the first MTC, and performs a random access (RA) procedure when performing the second MTC.

43. The communication device of claim 42, further comprising:

means for performing a third MTC with the network by using the first subband resource, after performing the second MTC.

44. The communication device of claim 35, wherein the communication device performs a RA procedure when performing the first MTC, and transmits or receives data when performing the second MTC.