Establishing additional reverse link carriers in multi-carrier wireless systems

• US 7,953,048 B2
• Filed: 09/21/2006
• Issued: 05/31/2011
• Est. Priority Date: 09/21/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Suk Woo, Sun, Li-Hsiang, Yoon, Young C
• Primary Examiner(s): Bost; Dwayne D
• Assistant Examiner(s): STERNBANE, LAURENCE J
• Application Number:
  US11/534,178
• Publication Number:
  US 20070066340A1
• Time in Patent Office: 1,713 Days
• Field of Search: 455/522, 455/450, 455/453, 370/329, 370/332, 370/335, 375/130
• US Class Current: 370/335
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus for reliably and quickly establishing multiple reverse links in multi-carrier wireless networks is provided. Signaling channels are established the on an existing forward link in order to transmit reverse link power control bits and the acknowledgment indications.

Claims

1. A method of establishing additional reverse link carriers in a multi-carrier wireless communication system, the method comprising:

a mobile terminal establishing a first communication link with a network by receiving data from the network via a first forward link carrier and transmitting data to the network via a first reverse link carrier;

the mobile terminal receiving a traffic channel assignment indicator for a second reverse link carrier from the network via the first forward link carrier;

the mobile terminal transmitting information associated with a channel quality of a second forward link to the network via the first reverse link carrier; and

the mobile terminal receiving reverse link power control information for the second reverse link via the first forward link carrier, the reverse link power control information associated with individually setting the initial transmission power of the second reverse link carrier based on the information associated with the channel quality of the second forward link.

2. The method of claim 1, further comprising:

transmitting an indicator to the network using an adjusted power level, the power level adjusted according to a predetermined step size in response to the reverse link power control information.

3. The method of claim 2, wherein an initial transmission power for transmitting the indicator is determined in response to at least one of a reverse link load and a channel correlation estimate between the first reverse link carrier and the second reverse link carrier.

4. The method of claim 2, wherein the indicator comprises at least one of a pilot signal and a reverse rate indicator.

5. The method of claim 1, further comprising:

receiving a notification signal from the network via the first forward link carrier, the notification signal indicating that the network has acquired the second reverse link carrier.

6. The method of claim 5, wherein the notification signal is received in one of a signaling message and a physical layer message.

7. The method of claim 1, wherein the first forward link carrier and the first reverse link carrier comprise a code division multiple access (CDMA) channel.

8. The method of claim 2, further comprising:

receiving a power-adjust signal from the network; and

transmitting another indicator at an adjusted power level, the power level adjusted according to a step size that is larger than the predetermined step size.

9. The method of claim 2, further comprising:

communicating packet data via the second reverse link carrier when the reverse link power control information received from the network is associated with decreasing a power level.

10. The method of claim 2, further comprising:

communicating packet data via the second reverse link carrier when an acknowledgement signal is received from the network.

20. The method of claim 1, wherein the information associated with the channel quality includes a channel quality indicator (CQI) for the second forward link.

21. The method of claim 1, wherein the information associated with the channel quality includes data rate control (DRC) information for the second forward link.

11. A method of establishing additional reverse link carriers in a multi-carrier wireless communication system, the method comprising:

a network establishing a first communication link with a mobile terminal by transmitting data to the mobile terminal via a first forward link carrier and receiving data from the mobile terminal via a first reverse link carrier;

the network transmitting a traffic channel assignment indicator for a second reverse link carrier to the mobile terminal via the first forward link carrier;

the network receiving information associated with a channel quality of a second forward link carrier from the mobile terminal via the first reverse link carrier; and

the network transmitting reverse link power control information for the second reverse link to the mobile terminal via the first forward link carrier, the reverse link power control information associated with individually setting the initial transmission power of the second reverse link carrier based on the information associated with the channel quality of the second forward link.

12. The method of claim 11, further comprising:

receiving an indicator from the mobile terminal, the indicator received at an adjusted power level, the power level adjusted according to a predetermined step size in response to the reverse link power control information.

13. The method of claim 12, wherein the indicator comprises at least one of a pilot signal and a reverse rate indicator.

14. The method of claim 11, further comprising:

transmitting a notification signal to the mobile terminal via one of the first forward link carrier, the notification signal indicating that the second reverse link carrier was acquired.

15. The method of claim 14, wherein the notification signal is transmitted in one of a signaling message and a physical layer message.

16. The method of claim 11, wherein the first forward link carrier and the first reverse link carrier comprise a code division multiple access (CDMA) channel.

17. The method of claim 12, further comprising:

transmitting a power-adjust signal to the mobile terminal; and

receiving another indicator at an adjusted power level, the power level adjusted according to a step size that is larger than the predetermined step size.

18. The method of claim 12, further comprising:

receiving packet data via the second reverse link carrier when the reverse link power control information transmitted to the mobile terminal is associated with decreasing a power level.

19. The method of claim 12, further comprising:

receiving packet data via the second reverse link carrier when an acknowledgement signal is transmitted to the mobile terminal.

22. The method of claim 11, wherein the information associated with the channel quality includes a channel quality indicator (CQI) for the second forward link.

23. The method of claim 11, wherein the information associated with the channel quality includes data rate control (DRC) information for the second forward link.

24. The method of claim 11, wherein the reverse link power control information is determined by comparing a measured signal-to-noise ratio of an indicator received from the mobile terminal to a predetermined value, the predetermined value adjusted when at least one of a null rate reverse rate indicator (RRI) is detected, the reverse link power control information is associated with decreasing a power level and a reverse traffic channel received from the mobile terminal is decoded.

25. A mobile terminal for establishing additional reverse link carriers in a multi-carrier wireless communication system, the mobile terminal comprising:

a transmitting/receiving unit adapted to transmit data to and receive data from a network;

a display unit adapted to display user interface information;

an input unit adapted to input user data; and

a processing unit adapted to establish a first communication link with the network by controlling the transmitting/receiving unit to receive data from the network via a first forward link carrier, to control the transmitting/receiving unit to transmit data to the network via a first reverse link carrier, to control the transmitting/receiving unit to receive a traffic channel assignment indicator for a second reverse link carrier via the first forward link carrier, to control the transmitting/receiving unit to transmit information associated with a channel quality of a second forward link carrier to the network via the first reverse link carrier, and to control the transmitting/receiving unit to receive reverse link power control information for the second reverse link from the network via the first forward link carrier, the reverse link power control information associated with individually setting the initial transmission power of the second reverse link carrier based on the information associated with the channel quality of the second forward link.

26. The terminal of claim 25, wherein the processing unit is further adapted to control the transmitting/receiving unit to transmit an indicator to the network using an adjusted power level, the power level adjusted according to a predetermined step size in response to the reverse link power control information.

27. The terminal of claim 26, wherein the processing unit is further adapted to determine an initial transmission power for transmitting the indicator in response to at least one of a reverse link load and a channel correlation estimate between the first reverse link carrier and the second reverse link carrier.

28. The terminal of claim 26, wherein the indicator comprises at least one of a pilot signal and a reverse rate indicator.

29. The terminal of claim 25, wherein the processing unit is further adapted to control the transmitting/receiving unit to:

receive a notification signal from the network via the first forward link carrier, the notification signal indicating that the network has acquired the second reverse link carrier.

30. The terminal of claim 29, wherein the notification signal is received in one of a signaling message and a physical layer message.

31. The terminal of claim 25, wherein the first forward link carrier and the first reverse link carrier comprise a code division multiple access (CDMA) channel.

32. The terminal of claim 26, wherein the processing unit is further adapted to control the transmitting/receiving unit to:

receive a power-adjust signal from the network; and

transmit another indicator at an adjusted power level, the power level adjusted according to a step size that is larger than the predetermined step size.

33. The terminal of claim 26, wherein the processing unit is further adapted to control the transmitting/receiving unit to:

communicate packet data via the second reverse link carrier when the reverse link power control information received from the network is associated with decreasing a power level.

34. The terminal of claim 33, wherein the processing unit is further adapted to control the transmitting/receiving unit to:

communicate packet data via the second reverse link carrier when an acknowledgement signal is received from the network.

35. The terminal of claim 25, wherein the information associated with the channel quality includes a channel quality indicator (CQI) for the second forward link.

36. The terminal of claim 25, wherein the information associated with the channel quality includes data rate control (DRC) information for the second forward link.

37. The terminal of claim 35, wherein the processing unit is further adapted to control the transmitting/receiving unit to:

transmit another indicator to the network using an adjusted power level, the power level adjusted according to a predetermined step size in response to the reverse link power control information.

38. A network for establishing additional reverse link carriers in a multi-carrier wireless communication system, the network comprising:

a transmitter adapted to transmit data to a mobile terminal;

a receiver adapted to receive data from the mobile terminal; and

a controller adapted to establish a first communication link with the mobile terminal by controlling the transmitter to transmit data to the mobile terminal via a first forward link carrier and control the receiver to receive data from the mobile terminal via a first reverse link carrier, to control the transmitter to transmit a traffic channel assignment indicator for a second reverse link carrier via the first forward link carrier, to control the receiver to receive information associated with channel quality of a second forward link from the mobile terminal via the first reverse link carrier, and to control the transmitter to transmit reverse link power control information for the second reverse link to the mobile terminal via the first forward link carrier, the reverse link power control information associated with individually setting the initial transmission power of the second reverse link carrier based on the information associated with the channel quality of the second forward link.

39. The network of claim 38, wherein the controller is further adapted to:

control the receiver to receive an indicator from the mobile network, the indicator received at an adjusted power level, the power level adjusted according to a predetermined step size in response to the reverse link power control information.

40. The network of claim 39, wherein the indicator comprises at least one of a pilot signal and a reverse rate indicator.

41. The network of claim 38, wherein the controller is further adapted to:

control the transmitter to transmit a notification signal to the mobile terminal via the first forward link carrier, the notification signal indicating that the second reverse link carrier was acquired.

42. The network of claim 41, wherein the notification signal is transmitted in one of a signaling message and a physical layer message.

43. The network of claim 38, wherein the first forward link carrier and the first reverse link carrier comprise a code division multiple access (CDMA) channel.

44. The network of claim 39, wherein the controller is further adapted to:

control the transmitter to transmit a power-adjust signal to the mobile terminal; and

control the receiver to receive another indicator at an adjusted power level, the power level adjusted according to a step size that is larger than the predetermined step size.

45. The network of claim 39, wherein the controller is further adapted to:

control the receiver to receive packet data via the second reverse link carrier when the reverse link power control information transmitted to the mobile terminal is associated with decreasing a power level.

46. The network of claim 39, wherein the controller is further adapted to:

control the receiver to receive packet data via the second reverse link carrier when an acknowledgement signal is transmitted to the mobile network.

47. The network of claim 38, wherein the information associated with the channel quality includes a channel quality indicator (CQI) for the second forward link.

48. The network of claim 38, wherein the information associated with the channel quality includes data rate control (DRC) information for the second forward link.

49. The network of claim 46, wherein the controller is further adapted to:

control the receiver to receive another indicator from the mobile network at an adjusted power level, the power level adjusted according to a predetermined step size in response to the reverse link power control information.

50. The network of claim 49, wherein the controller is further adapted to determine the reverse link power control information by comparing a measured signal to noise ratio of the other indicator received from the mobile terminal to a predetermined value, the predetermined value adjusted when at least one of a null rate reverse rate indicator (RRI) is detected, the reverse link power control information is associated with decreasing a power level and a reverse traffic channel received from the mobile network is decoded.