MOBILE RADIO DEVICE SYNCHRONIZATION

• US 20080247339A1
• Filed: 04/05/2007
• Published: 10/09/2008
• Est. Priority Date: 04/05/2007
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Infineon Technologies AG
• Inventors: Schmidt, Andreas, Eckert, Michael, Choi, Hyung-Nam
• Granted Patent: US 8,780,884 B2
• Time in Patent Office: Days
• US Class Current: 370/281
• CPC Class Codes: H04B 7/2681 Synchronisation of a mobile station with one base station
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

Method for synchronizing a plurality of mobile radio devices, mobile radio devices and a method for synchronizing a mobile radio device. In one embodiment of the invention, a method for synchronizing a plurality of mobile radio devices is provided including transmitting a downlink synchronization signal in a shared downlink synchronization channel to a plurality of mobile radio devices, and receiving a plurality of uplink synchronization signals via a plurality of dedicated uplink synchronization channels.

Claims

1. A method for synchronizing a plurality of mobile radio devices, comprising:

transmitting a downlink synchronization signal in a shared downlink synchronization channel to a plurality of mobile radio devices; and

receiving a plurality of uplink synchronization signals via a plurality of dedicated uplink synchronization channels.

2. The method of claim 1,

wherein the shared downlink synchronization channel is a shared downlink synchronization control channel.

3. The method of claim 1,

wherein the shared downlink synchronization channel is a frequency division duplex shared downlink synchronization control channel.

4. The method of claim 1,

wherein the plurality of dedicated uplink synchronization channels are a plurality of dedicated uplink synchronization control channels.

5. The method of claim 1,

wherein the plurality of dedicated uplink synchronization channels are a plurality of dedicated physical control channels.

6. The method of claim 1,

wherein the downlink synchronization signal comprises transmit power control information indicating a power control procedure to be used.

7. The method of claim 1,

wherein the downlink synchronization signal comprises pilot signal information shared by the plurality of mobile radio devices.

8. The method of claim 1,

wherein the downlink synchronization signal is received by the plurality of mobile radio devices;

and

wherein each mobile radio device of the plurality of mobile radio devices transmits a respective uplink synchronization signal via a respective dedicated uplink synchronization channel of the plurality of dedicated uplink synchronization channels.

9. The method of claim 1,

wherein each uplink synchronization signal comprises information indicating that the respective mobile radio device has synchronized to the shared downlink synchronization channel.

10. The method of claim 1,

wherein the method is carried out in a frequency division duplex mode.

11. The method of claim 1,

wherein the method is carried out in a cellular mobile radio communication system.

12. The method of claim 11,

wherein the method is carried out in accordance with a mobile radio communication system selected from a group of mobile radio communication systems consisting of:

Universal Mobile Telecommunications System mobile radio communication system;

Code Division Multiple Access 2000 mobile radio communication system; and

Freedom of Mobile Multimedia Access mobile radio communication system.

13. The method of claim 1,

wherein the method is carried out during a handover procedure.

14. The method of claim 13,

wherein the method is carried out during a handover procedure from a first mobile radio communication system to a second mobile radio communication system.

15. The method of claim 14,

wherein the first mobile radio communication system is a Global Systems for Mobile Communications mobile radio communication system or a Universal Mobile Telecommunications System;

and

wherein the second mobile radio communication system is a Universal Mobile Telecommunications System Long Term Evolution mobile radio communication system.

16. The method of claim 14,

wherein the first mobile radio communication system is a Universal Mobile Telecommunications System Long Term Evolution mobile radio communication system;

and

wherein the second mobile radio communication system is a Global Systems for Mobile Communications mobile radio communication system or a Universal Mobile Telecommunications System.

17. A mobile radio device, comprising:

a transmitter configured to transmit a downlink synchronization signal in a shared downlink synchronization channel to a plurality of mobile radio devices; and

a receiver configured to receive a plurality of uplink synchronization signals via a plurality of dedicated uplink synchronization channels.

18. The mobile radio device of claim 17,

wherein the shared downlink synchronization channel is a shared downlink synchronization control channel.

19. The mobile radio device of claim 17,

wherein the shared downlink synchronization channel is a frequency division duplex shared downlink synchronization control channel.

20. The mobile radio device of claim 17,

wherein the plurality of dedicated uplink synchronization channels are a plurality of dedicated uplink synchronization control channels.

21. The mobile radio device of claim 17,

wherein the plurality of dedicated uplink synchronization channels are a plurality of dedicated physical control channels.

22. The mobile radio device of claim 17,

wherein the downlink synchronization signal comprises transmit power control information indicating a power control procedure to be used.

23. The mobile radio device of claim 17,

herein the downlink synchronization signal comprises pilot signal information shared by the plurality of mobile radio devices.

24. The mobile radio device of claim 17,

wherein each uplink synchronization signal comprises information indicating that the respective mobile radio device has synchronized to the shared downlink synchronization channel.

25. The mobile radio device of claim 17,

wherein the mobile radio device is a cellular mobile radio device.

26. The mobile radio device of claim 17,

wherein the mobile radio device is a mobile radio device selected from a group of mobile radio devices consisting of:

Universal Mobile Telecommunications System mobile radio device;

Code Division Multiple Access 2000 mobile radio device; and

Freedom of Mobile Multimedia Access mobile radio device.

27. The mobile radio device of claim 17,

wherein the mobile radio device is configured to transmit the downlink synchronization signal and to receive the plurality of uplink synchronization signals during a handover procedure.

28. The mobile radio device of claim 27,

being a Global Systems for Mobile Communications mobile radio device or a Universal Mobile Telecommunications System mobile radio device or a Universal Mobile Telecommunications System Long Term Evolution mobile radio device.

29. The mobile radio device of claim 27,

being a mobile radio network unit.

30. The mobile radio device of claim 29,

being a mobile radio base station.

31. A mobile radio device, comprising:

a receiver configured to receive a downlink synchronization signal in a shared downlink synchronization channel shared by a plurality of mobile radio devices; and

a transmitter configured to transmit an uplink synchronization signal via a dedicated uplink synchronization channel.

32. The mobile radio device of claim 31,

wherein the shared downlink synchronization channel is a shared downlink synchronization control channel.

33. The mobile radio device of claim 31,

wherein the shared downlink synchronization channel is a frequency division duplex shared downlink synchronization control channel.

34. The mobile radio device of claim 31,

wherein the dedicated uplink synchronization channel is a dedicated uplink synchronization control channel.

35. The mobile radio device of claim 31,

wherein the dedicated uplink synchronization channel is a dedicated physical control channel.

36. The mobile radio device of claim 31,

wherein the downlink synchronization signal comprises transmit power control information indicating a power control procedure to be used.

37. The mobile radio device of claim 31,

wherein the downlink synchronization signal comprises pilot signal information shared by the plurality of mobile radio devices.

38. The mobile radio device of claim 31,

wherein each uplink synchronization signal comprises information indicating that the respective mobile radio device has synchronized to the shared downlink synchronization channel.

39. The mobile radio device of claim 31,

wherein the mobile radio device is a cellular mobile radio device.

40. The mobile radio device of claim 31,

wherein the mobile radio device is a mobile radio device selected from a group of mobile radio devices consisting of:

Universal Mobile Telecommunications System mobile radio device;

Code Division Multiple Access 2000 mobile radio device; and

Freedom of Mobile Multimedia Access mobile radio device.

41. The mobile radio device of claim 31,

being a Global Systems for Mobile Communications mobile radio device or a Universal Mobile Telecommunications System mobile radio device or a Universal Mobile Telecommunications System Long Term Evolution mobile radio device.

42. The mobile radio device of claim 31,

being a mobile radio terminal device.

43. The mobile radio device of claim 42,

being a mobile radio user equipment.

44. A method for synchronizing a mobile radio device, comprising:

transmitting a downlink synchronization signal in a shared downlink synchronization channel to a mobile radio device; and

receiving an uplink synchronization signal via a dedicated uplink synchronization channel.