Method and apparatus for transmitting high speed data in a spread spectrum communications system

• US 6,480,521 B1
• Filed: 03/26/1997
• Issued: 11/12/2002
• Est. Priority Date: 03/26/1997
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tiedemann, Edward G. Jr., Jou, Yu-Cheun, Odenwalder, Joseph P.
• Primary Examiner(s): LUTHER, WILLIAM A
• Application Number:
  US08/886,815
• Time in Patent Office: 2,057 Days
• Field of Search: 375/200, 375/206, 375/208, 375/201, 375/347, 375/346, 375/316, 375/223, 375/202, 375/222, 375/225, 375/219, 375/224, 375/309, 375/295, 370/342, 370/209, 370/252, 370/441, 370/310, 370/208, 370/203, 370/319, 370/316, 370/315, 370/335, 370/468, 370/320, 370/465, 370/479, 370/464, 370/241, 370/431, 370/347, 370/345, 380/34, 380/9, 380/33, 455/422, 455/522, 455/517, 455/507, 455/500, 455/39, 1/1
• US Class Current: 375/130
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence

Abstract

The present invention is a novel and improved method and apparatus for transmitting high speed digital data in a spread spectrum communications system. In particular, the present invention provides methods for transmitting forward link and reverse link high speed digital data. For both forward link and reverse link transmissions, the present invention describes a method for processing the data for transmission in a 1.2288 Mcps band and in a 3.6268 Mcps band. In addition, the present invention describes a method for transmitting forward link and reverse link data of both rate set 1 digital data and rate set 2 digital data. Rate set 1 digital data comprises variable rate data at rates defined as Mux Option 1 in the IS-95 standard. Rate set 2 digital data comprises variable rate data at rates defined as Mux Option 2 in the appendix to the IS-95 standard. In addition the present invention describes methods of transmitting the data for applications using packet switched technology and circuit switched technology.

Claims

1. A method for processing a frame of data on a primary channel, comprising the steps of:

(a) determining whether or not at least one additional future frame of data will be transmitted on a supplemental channel from a first station to a second station; and

(b) transmitting a demod flag bit from the first station to the second station on the primary channel if a determination is made that at least one additional future frame of data will be transmitted on the supplemental channel from the first station to the second station.

2. The method as in claim 1, further comprising:

adding the demod flag bit to a frame of data; and

encoding the frame of data with the demod flag bit.

3. The method as in claim 2, further comprising:

encoding the frame of data at a first data rate to form an encoded sequence;

interleaving the encoded sequence to form an interleaved sequence; and

transmitting a non-integer portion of the interleaved sequence.

4. An apparatus for processing a frame of data on a primary channel, comprising:

means for determining that at least one additional future frame of data will be transmitted on a supplemental channel from a first station to a second station; and

means for transmitting a demod flag bit from the first station to the second station on the primary channel if a determination is made that at least one additional future frame of data will be transmitted on a supplemental channel from the first station to the second station.

5. The apparatus as in claim 4, further comprising:

means for adding the demod flag bit to a frame of data; and

means for encoding the frame of data with the demod flag bit.

6. The apparatus as in claim 5, further comprising:

means for encoding the frame of data at a first data rate to form an encoded sequence;

means for interleaving the encoded sequence to form an interleaved sequence; and

means for transmitting a non-integer portion of the interleaved sequence.

7. A method for processing data, comprising the steps of:

determining whether a frame of data will be transmitted on a supplemental channel from a first station to a second station; and

transmitting a demod flag bit from the first station to the second station on the primary channel if a determination is made that the frame of data will be transmitted on the supplemental channel from the first station to the second station.

8. An apparatus for processing data, comprising:

means for determining whether a frame of data will be transmitted on a supplemental channel from a first station to a second station; and

means for transmitting a demod flag bit from the first station to the second station on the primary channel if a determination is made that the frame of data will be transmitted on the supplemental channel from the first station to the second station.

9. An apparatus for processing a frame of data on a primary channel, comprising:

a demodulator flag generator configured to generate a demod flag if a determination is made that at least one frame of data will be transmitted on a supplemental channel from a first station to a second station; and

a transmitter configured to transmit the demod flag.

10. The apparatus as in claim 9, further comprising:

an encoder configured to encode data and the demod flag to form an encoded sequence.

11. The apparatus as in claim 10, further comprising:

interleaver configured to interleave the encoded sequence to form an interleaved sequence.

12. The apparatus as in claim 11, wherein the transmitter configured to transmit the demod flag comprises:

the transmitter configured to transmit a non-integer portion of the interleaved sequence.