Method and apparatus for reliably transmitting radio blocks with piggybacked ACK/NACK fields

• US 8,576,732 B2
• Filed: 08/22/2008
• Issued: 11/05/2013
• Est. Priority Date: 08/24/2007
• Status: Expired due to Fees

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Aghili, Behrouz, Rudolf, Marian, Chitrapu, Prabhakar R., Dick, Stephen G.
• Primary Examiner(s): PARK, JUNG H
• Application Number:
  US12/196,385
• Publication Number:
  US 20090052378A1
• Time in Patent Office: 1,901 Days
• Field of Search: 370/229, 370/232, 370/235, 370/236, 370/252, 370/328, 370/329, 370/338, 709/236
• US Class Current: 370/252
• CPC Class Codes: A61P 25/00 Drugs for disorders of the nervous system
• CPC Class Codes: H04L 1/0081 Formats specially adapted to avoid errors in the feedback channel H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/0086 Unequal error protection H04L27/00 and H04L1/004 take precedence for layer 1/2 aspects, e.g. bit loading
• CPC Class Codes: H04L 1/1664 the supervisory signal being transmitted together with payload signals; piggybacking
• CPC Class Codes: H04L 2001/0098 Unequal error protection
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel

Abstract

Piggybacked acknowledgement/non-acknowledgement (PAN) bits in unreliable bit positions of a modulated symbol are swapped with data bits located in more reliable bit positions. In addition, a power offset value may be applied to the symbols containing the PAN bits.

Claims

1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

generating a stream of bits for transmission, the stream of bits including data bits and piggybacked acknowledgement/non-acknowledgement (PAN) bits;

interleaving the stream of bits to create an interleaved stream of bits;

modulating the interleaved stream of bits to create a plurality of symbols,

wherein each symbol represents a plurality of bits and has a least significant bit (LSB) position, and

wherein no PAN bits are present in the LSB position of each of the plurality of symbols; and

transmitting the plurality of symbols.

2. The method of claim 1, wherein the modulating the stream of bits is performed using eight phase shift keying (8PSK) modulation.

3. The method of claim 1, wherein the modulating the stream of bits is performed using sixteen quadrature amplitude modulation (16-QAM).

4. The method of claim 1, wherein the modulating the stream of bits is performed using thirty two quadrature amplitude modulation (32-QAM).

5. The method of claim 1, wherein the PAN bits are located proximate to a training sequence.

6. The method of claim 1, further comprising:

applying a power offset value to a transmission power associated with each bit of the stream of bits.

7. The method of claim 6, wherein the stream of bits further includes header bits, stealing flags, training sequence bits, and uplink state flag bits.

8. The method of claim 7, wherein the applied power offset value is based on a type of bit of the bit stream.

9. The method of claim 6, wherein the power offset value is calculated by the WTRU.

10. A wireless transmit/receive unit (WTRU), the WTRU comprising:

a processor configured to generate a stream of bits for transmission, the stream of bits including data bits and piggybacked acknowledgement/non-acknowledgement (PAN) bits;

an interleaver configured to interleave the stream of bits to create an interleaved stream of bits;

a modulator configured to modulate the interleaved stream of bits to create a plurality of symbols,

wherein each symbol represents a plurality of bits and has a least significant bit (LSB) position, and

wherein no PAN bits are present in the LSB position of each of the plurality of symbols; and

a transmitter configured to transmit the plurality of symbols.

11. The WTRU of claim 10, wherein the modulator is further configured to modulate the stream of bits using eight phase shift keying (8PSK) modulation.

12. The WTRU of claim 10, wherein the modulator is further configured to modulate the stream of bits using sixteen quadrature amplitude modulation (16-QAM).

13. The WTRU of claim 10, wherein the modulator is further configured to modulate the stream of bits using thirty two quadrature amplitude modulation (32-QAM).

14. The WTRU of claim 10, wherein the PAN bits are located proximate to a training sequence.

15. The WTRU of claim 10, further comprising:

a transmitter configured to apply a power offset value to a transmission power associated with each bit of the stream of bits.

16. The WTRU of claim 15, wherein the stream of bits further includes header bits, stealing flags, training sequence bits, and uplink state flag bits.

17. The WTRU of claim 16, wherein the applied power offset value is based on a type of bit of the bit stream.

18. The WTRU of claim 15, further comprising:

a processor configured to calculate the power offset value.

19. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

generating data bits and piggybacked acknowledgement/non-acknowledgement (PAN) bits;

generating a plurality of symbols based on the data bits and the PAN bits,

wherein each symbol of the plurality of symbols represents a plurality of bits and has a least significant bit (LSB) position, and

wherein no PAN bits are present in the LSB position of each of the plurality of symbols; and

transmitting the plurality of symbols.

20. The method of claim 19, wherein the generating the plurality of symbols includes:

channel coding the data bits and PAN bits to generate channel-coded bits;

interleaving the channel-coded bits to generate interleaved bits; and

modulating the interleaved bits to generate the plurality of symbols.

21. The method of claim 20, wherein the modulating the interleaved bits includes using eight phase shift keying (8PSK) modulation, sixteen quadrature amplitude modulation (16-QAM), or thirty two quadrature amplitude modulation (32-QAM).