Quick paging channel with reduced probability of missed page

• US 8,750,908 B2
• Filed: 06/15/2006
• Issued: 06/10/2014
• Est. Priority Date: 06/16/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Agrawal, Avneesh, Prakash, Rajat
• Primary Examiner(s): Gonzalez, Amancio
• Application Number:
  US11/455,071
• Publication Number:
  US 20060285485A1
• Time in Patent Office: 2,917 Days
• Field of Search: 455/458, 370/208, 370/260, 370/281, 370/295, 370/302
• US Class Current: 455/458
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Abstract

A quick paging channel in a random access wireless communication system includes at least one bit in a quick paging frame identifying the presence of a paging message for an access terminal or group of access terminals. The quick paging bits identifying the presence of a paging message for a first access terminal is encoded with one or more quick paging bits corresponding to one or more additional access terminals to produce one or more forward error correction bits. The jointly encoded quick paging bits are broadcast to the access terminals by time division multiplexing the quick paging frame with additional frames of information.

Claims

1. A method of notifying an access terminal, the method comprising:

determining presence of a scheduled message for the access terminal;

setting a quick paging bit from a plurality of quick paging bits in a quick paging block, the quick paging bit corresponding to the access terminal;

compressing the quick paging block to generate a compressed quick paging block;

encoding the compressed quick paging block to generate an encoded quick paging packet;

generating at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging block; and

transmitting the at least one OFDM symbol;

wherein compressing the quick paging block comprises;

determining a number of asserted quick paging bits from the plurality of quick paging bits; and

generating successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

2. The method of claim 1, wherein the generating the at least one OFDM symbol comprises generating at least one OFDM symbol having an entire encoded quick paging block.

3. The method of claim 1, further comprising:

Generating additional bits distinct from the quick paging block; and

Appending the additional bits to the quick paging block prior to encoding the quick paging block.

4. The method of claim 1, wherein compressing the quick paging block comprises:

determining a number of asserted quick paging bits from the plurality of quick paging bits; and

generating a predetermined value representative of the quick paging block if the number of asserted quick paging bits is greater than a predetermined amount.

5. The method of claim 1, wherein encoding the quick paging block comprises systematic encoding the quick paging block.

6. The method of claim 1, wherein encoding the quick paging block comprises generating a Cyclic Redundancy Code of a packet including the quick paging block.

7. The method of claim 1, wherein transmitting the at least one OFDM symbol comprises time division multiplexing the at least one OFDM symbol with other information over at least one channel.

8. The method of claim 1, wherein transmitting the at least one OFDM symbol comprises transmitting the at least one OFDM symbol during a superframe preamble.

9. A method of notifying an access terminal, the method comprising:

setting a quick paging bit corresponding to the access terminal in a quick paging block having a plurality of bits corresponding to a plurality of access terminals;

compressing the quick paging block to generate a compressed quick paging block; and

encoding the compressed quick paging block to generate an encoded quick paging block, wherein the compressing the quick paging block comprises;

determining a number of asserted quick paging bits from the plurality of quick paging bits; and

generating successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

10. The method of claim 9, further comprising time division multiplexing the encoded quick paging block with other information over at least one channel of a wireless communication system.

11. The method of claim 9, further comprising:

generating an Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging block; and

transmitting the OFDM symbol.

12. The method of claim 11, wherein generating the OFDM symbol comprises modulating at least a portion of the encoded quick paging block onto substantially all signal carrying subcarriers of the OFDM symbol.

13. The method of claim 11, wherein generating the OFDM symbol comprises Quadrature Phase Shift Keying (QPSK) modulating at least a portion of the encoded quick paging block onto at least a subset of subcarriers of the OFDM symbol.

14. A method of processing a quick paging message, the method comprising:

receiving a quick paging packet;

decoding the quick paging packet to generate a quick paging block;

decompressing the quick paging block; and

determining a status of a quick paging bit associated with an access terminal based on an output of the decompressing process,

wherein the decompressing the quick paging block comprises;

determining a number of asserted quick paging bits represented in the quick paging block; and

examining positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with an access terminal is asserted.

15. The method of claim 14, wherein receiving the quick paging packet comprises receiving the quick paging packet including the quick paging block and a load control block.

16. The method of claim 14, wherein receiving the quick paging packet comprises receiving an Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the quick paging packet.

17. The method of claim 14, wherein determining the status of the quick paging bit comprises:

determining a position of an asserted bit in the quick paging block based on an output of the decompressing process; and

comparing the position to a position of the quick paging bit associated with the access terminal.

18. An apparatus for generating a quick paging message, the system comprising:

a scheduler configured to determine scheduled a paging message for an access terminal;

a quick paging block generator coupled to the scheduler and configured to assert a quick paging bit corresponding to the access terminal and configured to generate a quick paging block having at least the quick paging bit and a distinct quick paging bit corresponding to a distinct access terminal;

a compression block coupled to the quick paging block generator, the compression block being configured to determine a number of asserted quick paging bits from a plurality of quick paging bits and to generate successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount;

an encoder coupled to the quick paging block generator and configured to generate an encoded quick paging packet based on the quick paging block; and

a transmit processor coupled to the encoder and configured to generate at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging packet.

19. The apparatus of claim 18, wherein the:

compression block is configured to compress the quick paging block and to generate a compressed quick paging block; and

wherein the encoder is coupled to the compression block and is configured to generate the encoded quick paging packet based on the compressed quick paging block.

20. The apparatus of claim 18, further comprising:

a load control module configured to generate load control block having at least one bit distinct from a quick paging bit;

an aggregator coupled to the quick paging block generator and the load control block and configured to aggregate the quick paging block with the load control block; and

wherein the encoder is configured to encode an aggregated output of the aggregator.

21. The system of claim 18, further comprising a transmitter coupled to the transmit processor and configured to transmit the at least one OFDM symbol during a superframe preamble.

22. The system of claim 18, further comprising a transmitter coupled to the encoder and configured to time division multiplex the encoded quick paging packet over at least one channel with other information.

23. An apparatus for notifying an access terminal, the system comprising:

means for determining presence of a scheduled message for the access terminal;

means for setting a quick paging bit from a plurality of quick paging bits in a quick paging block, the quick paging bit corresponding to the access terminal;

means for compressing the quick paging block to generate a compressed quick paging block;

means for encoding the compressed quick paging block to generate an encoded quick paging packet;

means for generating at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging block; and

means for transmitting the at least one OFDM symbol,

wherein the means for compressing the quick paging block determines a number of asserted quick paging bits from the plurality of quick paging bits and generates successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

24. The apparatus of claim 23, wherein the means for generating the at least one OFDM symbol comprises means for generating at least one OFDM symbol having an entire encoded quick paging block.

25. The apparatus of claim 23, further comprising:

means for generating additional bits distinct from the quick paging block; and

means for appending the additional bits to the quick paging block prior to encoding the quick paging block.

26. The apparatus of claim 23, wherein the means for compressing the quick paging block comprises:

means for determining a number of asserted quick paging bits from the plurality of quick paging bits; and

means for generating a predetermined value representative of the quick paging block if the number of asserted quick paging bits is greater than a predetermined amount.

27. An apparatus for notifying an access terminal, the system comprising:

means for setting a quick paging bit corresponding to the access terminal;

means for compressing the quick paging block to generate a compressed quick paging block;

means for jointly encoding the quick paging bit with at least one additional quick paging bit corresponding to a distinct access terminal to generate an encoded quick paging block; and

means for time division multiplexing the encoded quick paging block with distinct information over a channel,

wherein the means for compressing the quick paging block determines a number of asserted quick paging bits from the plurality of quick paging bits and generates successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

28. The apparatus of claim 27, further comprising means for time division multiplexing the encoded quick paging block with other information over at least one channel of a wireless communication system.

29. The apparatus of claim 27, further comprising:

means for generating at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging block.

30. The apparatus of claim 29, wherein the means for generating the at least one OFDM symbol comprises modulating at least a portion of the encoded quick paging block onto substantially all signal carrying subcarriers of the at least one OFDM symbol.

31. The apparatus of claim 29, wherein generating the at least one OFDM symbol comprises Quadrature Phase Shift Keying (QPSK) modulating at least a portion of the encoded quick paging block onto at least a subset of subcarriers of the at least one OFDM symbol.

32. An apparatus for processing a quick paging message, the system comprising:

means for receiving a quick paging packet;

means for decoding the quick paging packet to generate a quick paging block;

means for decompressing the quick paging block; and

means for determining a status of a quick paging bit associated with an access terminal based on an output of the decompressing process,

wherein the means for decompressing the quick paging block determines a number of asserted quick paging bits represented in the quick paging block and examines positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with an access terminal is asserted.

33. The apparatus of claim 32, wherein the means for receiving the quick paging packet comprises means for receiving the quick paging packet including the quick paging block and a load control block.

34. The apparatus of claim 32, wherein the means for receiving the quick paging packet comprises means for receiving at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the quick paging packet.

35. The apparatus of claim 32, wherein the means for determining the status of the quick paging bit comprises:

means for determining a position of an asserted bit in the quick paging block based on an output of the decompressing process; and

means for comparing the position to a position of the quick paging bit associated with the access terminal.

36. A non-transitory computer readable medium including computer readable instructions that may be utilized by one or more processors, the instructions comprising:

instructions for determining presence of a scheduled message for the access terminal;

instructions for setting a quick paging bit from a plurality of quick paging bits in a quick paging block, the quick paging bit corresponding to the access terminal;

instructions for compressing the quick paging block to generate a compressed quick paging block;

instructions for encoding the compressed quick paging block to generate an encoded quick paging packet;

instructions for generating at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging block; and

instructions for transmitting the at least one OFDM symbol;

wherein the instructions for compressing the quick paging block comprises;

instructions for determining a number of asserted quick paging bits from the plurality of quick paging bits; and

instructions for generating successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

37. A non-transitory computer readable medium including computer

readable instructions that may be utilized by one or more processors, the instructions comprising:

instructions for setting a quick paging bit corresponding to the access terminal in a quick paging block having a plurality of bits corresponding to a plurality of access terminals;

instructions for compressing the quick paging block to generate a compressed quick paging block; and

instructions for encoding the compressed quick paging block to generate an encoded quick paging block, wherein the instructions for compressing the quick paging block comprises;

instructions for determining a number of asserted quick paging bits from the plurality of quick paging bits; and

instructions for generating successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

38. A non-transitory computer readable medium including computer readable instructions that may be utilized by one or more processors, the instructions comprising:

instructions for processing a quick paging packet;

instructions for decoding the quick paging packet to generate a quick paging block;

instructions for decompressing the quick paging block; and

instructions for determining a status of a quick paging bit associated with an access terminal based on an output of the decompressing process,

wherein the instructions for decompressing the quick paging block comprises;

instructions for determining a number of asserted quick paging bits represented in the quick paging block; and

instructions for examining positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with an access terminal is asserted.

39. The non-transitory computer readable medium of claim 38, the instructions further comprising:

instructions for determining a position of an asserted bit in the quick paging block based on an output of the decompressing process; and

instructions for comparing the position to a position of the quick paging bit associated with the access terminal.

40. A method of processing a quick paging message in a wireless device, the method comprising:

receiving and decoding a quick paging block in the wireless device; and

decompressing the decoded quick paging block by determining a number of asserted quick paging bits represented in the quick paging block, and examining positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with the wireless device is asserted.

41. The method of claim 40, wherein receiving the quick paging block further comprises:

receiving a quick paging packet that contains the quick paging block and a load control block.

42. The method of claim 41, wherein receiving the quick paging packet comprises receiving an Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the quick paging packet.

43. The method of claim 40, further comprising:

determining the status of the quick paging bit by determining a position of an asserted bit in the quick paging block based on an output of the decompressing of the decoded quick paging block, and comparing the position to a position of the quick paging bit associated with the wireless device.

44. An apparatus for processing a quick paging message in a wireless device, the apparatus comprising:

means for receiving and decoding a quick paging block in the wireless device; and

means for decompressing the decoded quick paging block by determining a number of asserted quick paging bits represented in the quick paging block, and examining positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with the wireless device is asserted.

45. The apparatus of claim 44, wherein the means for receiving the quick paging block further comprises:

means for receiving a quick paging packet that contains the quick paging block and a load control block.

46. The apparatus of claim 45, wherein the means for receiving the quick paging packet comprises means for receiving an Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the quick paging packet.

47. The apparatus of claim 44, further comprising:

means for determining the status of the quick paging bit by determining a position of an asserted bit in the quick paging block based on an output of the decompressing of the decoded quick paging block, and comparing the position to a position of the quick paging bit associated with the wireless device.

48. An apparatus for processing a quick paging message in a wireless device, the apparatus comprising:

a receiver configured to receive a quick paging block in the wireless device;

a decoder configured to decode the quick paging block; and

a quick paging block decompress block configured to decompress the decoded quick paging block by determining a number of asserted quick paging bits represented in the quick paging block, and examining positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with the wireless device is asserted.

49. The apparatus of claim 48, wherein the receiver is further configured to receive a quick paging packet that contains the quick paging block and a load control block.

50. The apparatus of claim 49, wherein the receiver is further configured to receive an Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the quick paging packet.

51. The apparatus of claim 48, further comprising:

a status determination block configured to determine the status of the quick paging bit by determining a position of an asserted bit in the quick paging block based on an output of the quick paging block decompress block, and comparing the position to a position of the quick paging bit associated with the wireless device.

52. A non-transitory computer readable medium including computer readable instructions that may be utilized by one or more processors, the instructions comprising:

instructions for receiving and decoding a quick paging block in a wireless device; and

instructions for decompressing the decoded quick paging block by determining a number of asserted quick paging bits represented in the quick paging block, and examining positions of the asserted quick paging bits in successive fields within the quick paging block to determine whether a quick paging bit associated with the wireless device is asserted.

53. An apparatus for generating a quick paging message for use by an access terminal, the apparatus comprising:

a quick paging block generator configured to assert a quick paging bit corresponding to the access terminal and configured to generate a quick paging block having at least the quick paging bit and a distinct quick paging bit corresponding to a distinct access terminal; and

a compression block coupled to the quick paging block generator, the compression block configured to determine a number of asserted quick paging bits from a plurality of quick paging bits and to generate successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

54. The apparatus of claim 53, further comprising:

an encoder coupled to the quick paging block generator and configured to generate an encoded quick paging packet based on the quick paging block; and

a transmit processor coupled to the encoder and configured to generate at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging packet.

55. The apparatus of claim 54, wherein the compression block is configured to compress the quick paging block and to generate a compressed quick paging block;

and wherein the encoder is coupled to the compression block and is configured to generate the encoded quick paging packet based on the compressed quick paging block.

56. The apparatus of claim 53, further comprising:

a load control module configured to generate load control block having at least one bit distinct from a quick paging bit; and

an aggregator coupled to the quick paging block generator and the load control block and configured to aggregate the quick paging block with the load control block;

wherein the encoder is configured to encode an aggregated output of the aggregator.

57. The apparatus of claim 54, further comprising a transmitter coupled to the encoder and configured to time division multiplex the encoded quick paging packet over at least one channel with other information.

58. A method for generating a quick paging message for use by an access terminal, the method comprising:

asserting a quick paging bit corresponding to the access terminal and configured to generate a quick paging block having at least the quick paging bit and a distinct quick paging bit corresponding to a distinct access terminal; and

determining a number of asserted quick paging bits from a plurality of quick paging bits and to generate successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

59. The method of claim 58, further comprising:

generating an encoded quick paging packet based on the quick paging block; and

generating at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging packet.

60. The method of claim 59, further comprising:

compressing the quick paging block to generate a compressed quick paging block; and

generating the encoded quick paging packet based on the compressed quick paging block.

61. The method of claim 58, further comprising:

generating a load control block having at least one bit distinct from a quick paging bit;

aggregating the quick paging block with the load control block; and

encoding the aggregated quick paging block and load control block.

62. The method of claim 59, further comprising:

transmitting the encoded quick paging block using time division multiplexing of the encoded quick paging packet over at least one channel with other information.

63. An apparatus for generating a quick paging message for use by an access terminal, the apparatus comprising:

means for asserting a quick paging bit corresponding to the access terminal and configured to generate a quick paging block having at least the quick paging bit and a distinct quick paging bit corresponding to a distinct access terminal; and

means for determining a number of asserted quick paging bits from a plurality of quick paging bits and to generate successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.

64. The apparatus of claim 63, further comprising:

means for generating an encoded quick paging packet based on the quick paging block; and

means for generating at least one Orthogonal Frequency Division Multiplex (OFDM) symbol having at least a portion of the encoded quick paging packet.

65. The apparatus of claim 64, further comprising:

means for compressing the quick paging block to generate a compressed quick paging block; and

means for generating the encoded quick paging packet based on the compressed quick paging block.

66. The apparatus of claim 63, further comprising:

means for generating a load control block having at least one bit distinct from a quick paging bit;

means for aggregating the quick paging block with the load control block; and

means for encoding the aggregated quick paging block and load control block.

67. The apparatus of claim 64, further comprising:

means for transmitting the encoded quick paging block using time division multiplexing of the encoded quick paging packet over at least one channel with other information.

68. A non-transitory computer readable medium including computer readable instructions that may be utilized by one or more processors, the instructions comprising:

asserting a quick paging bit corresponding to an access terminal and configured to generate a quick paging block having at least the quick paging bit and a distinct quick paging bit corresponding to a distinct access terminal; and

determining a number of asserted quick paging bits from a plurality of quick paging bits and to generate successive fields indicating positions of the asserted quick paging bits within the quick paging block if the number of asserted bits is less than a predetermined amount.