US6574211B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for high rate packet data transmission
Assignee: Qualcomm Inc
•
Filing: 1997-11-03
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Granted: 2003-06-03
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Expires: 2017-11-03
Abstract
Abstract In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.
Inventors
- 👤 Roberto Padovani
- 👤 Paul E. Bender
- 👤 Peter J. Black
- 👤 Matthew S. Grob
- 👤 Jurg K. Hinderling
- 👤 Nagabhushana T. Sindhushayana
- 👤 Charles E. Wheatley, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/20; H04W72/23; H04W28/00; H04W28/16; H04W28/18; H04W28/22; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04B1/7103; H04L; H04L1/00; H04L1/08; H04L27/00; H04L27/26; H04L27/2601; H04L27/2602; H04L27/26035; H04W52/00; H04W52/04; H04W72/04; H04W72/044; H04W72/0446; H04W72/50; H04W72/54; H04W72/542; H04B2201/00; H04B2201/69; H04B2201/707; H04B2201/70702; H04B2201/7097; H04B2201/709709; H04L1/12; H04L1/16; H04L1/1607; H04L1/1628; H04W16/00; H04W16/14; H04W24/00; H04W52/06; H04W52/12; H04W52/18; H04W52/24; H04W52/241; H04W52/248; H04W52/26; H04W52/38; H04W52/40
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
120 words
A method for high speed packet data transmission from at least one base station to a mobile station comprising: measuring at the mobile station a set of parameters associated with forward link signals from said at least one base station; selecting at the mobile station a selected base station from said at least one base station based on said set of parameters; sending a rate control information message from the mobile station to said selected base station at every time slot on a reverse link; and receiving data at the mobile station from said selected base station at the data rate in accordance with said rate control information message if there is a data packet directed to the mobile station.
Claim 2
Independent Claim
120 words
A method for high speed packet data transmission from at least one base station to a mobile station comprising: measuring at the mobile station a set of parameters associated with forward link signals from said at least one base station; selecting at the mobile station a selected base station from said at least one base station based on said set of parameters; sending a rate control information message from the mobile station to said selected base station at every time slot on a reverse link; and receiving data at the mobile station from said selected base station at the data rate in accordance with said rate control information message if there is a data packet directed to the mobile station.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein said measuring, selecting, and sending are performed at each time slot of a plurality of time slots until said data transmission is completed.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said measuring is performed by taking into account a received value of a forward activity bit.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein said measuring is performed on forward link pilot signals from all base stations in an active set of said mobile station.
Claim 6
Dependent Claim
42 words
The method of claim 4 wherein an additional base station is added to said active set of the mobile station based on whether a power of a signal received at the mobile station from said additional base station exceeds a predetermined threshold.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said set of parameters includes a C/I of said forward link signals.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein said selecting is based on present and previous C/I of said forward link signals.
Claim 9
Dependent Claim
34 words
The method of claim 1 wherein said selecting is based on whether the signal level of the selected base station exceeds the signal level of a previously selected base station by a hysteresis value.
Claim 10
Dependent Claim
35 words
The method of claim 1 wherein said selecting is based on whether the signal level of the selected base station exceeds the signal level of a previously selected base station for a predetermined time duration.
Claim 11
Dependent Claim
28 words
The method of claim 1 wherein said sending step is performed by covering said rate control information message with a Walsh code corresponding to said selected base station.
Claim 12
Dependent Claim
14 words
The method of claim 10 wherein said Walsh code is 128 chips in length.
Claim 13
Dependent Claim
18 words
The method of claim 1 wherein said rate control information message is indicate of a requested data rate.
Claim 14
Dependent Claim
19 words
The method of claim 12 wherein said requested data rate is one of a plurality of supportable data rates.
Claim 15
Dependent Claim
35 words
The method of claim 13 wherein said supportable data rates are selected in accordance with a cumulative distribution function of C/I within a cell within which the mobile station and the selected base station reside.
Claim 16
Dependent Claim
20 words
The method of claim 1 wherein said rate control information message is indicative of a quality of a transmission link.
Claim 17
Dependent Claim
19 words
The method of claim 1 wherein said rate control information message occupies an earlier portion of a time slot.
Claim 18
Dependent Claim
21 words
The method of claim 1 wherein said measuring, selecting, and sending are performed during each of a plurality of time slots.
Claim 19
Dependent Claim
18 words
The method of claim 17 wherein each of said plurality of time slots has a predetermined fixed duration.
Claim 20
Dependent Claim
14 words
The method of claim 18 wherein said predetermined fixed duration is approximately 1.67 milliseconds.
Claim 21
Dependent Claim
26 words
The method of claim 4 wherein said forward link pilot signals are received within pilot bursts transmitted from each of said at least one base station.
Claim 22
Dependent Claim
19 words
The method of claim 20 wherein said pilot bursts occur at fixed intervals and are of a fixed duration.
Claim 23
Dependent Claim
12 words
The method of claim 21 wherein said fixed duration is sixty-four chips.
Claim 24
Dependent Claim
28 words
The method of claim 20 wherein said pilot bursts occur at fixed positions within each of a plurality of time slots having a fixed predetermined time slot length.
Claim 25
Dependent Claim
33 words
The method of claim 23 wherein each of said time slots comprises two of said pilot bursts centered at the end of the first and third quarters of each of said time slots.
Claim 26
Dependent Claim
118 words
A transmitter for high speed packet data transmission comprising: an encoder for receiving data packets and encoding said data packets into encoded packets; a frame puncture element for receiving said encoded packets and puncturing a portion of said encoded packets to provided punctured packets; a variable rate controller connected to said frame puncture element for receiving said punctured packets and demultiplexing said punctured packets into parallel channels; a Walsh cover element connected to said variable rate controller for receiving said parallel channels and covering said parallel channels with Walsh covers to provide orthogonal channels; and a gain element connected to said Walsh cover element for receiving said orthogonal channels and scaling said orthogonal channels to provide scaled channels.
Claim 27
Dependent Claim
118 words
A transmitter for high speed packet data transmission comprising: an encoder for receiving data packets and encoding said data packets into encoded packets; a frame puncture element for receiving said encoded packets and puncturing a portion of said encoded packets to provided punctured packets; a variable rate controller connected to said frame puncture element for receiving said punctured packets and demultiplexing said punctured packets into parallel channels; a Walsh cover element connected to said variable rate controller for receiving said parallel channels and covering said parallel channels with Walsh covers to provide orthogonal channels; and a gain element connected to said Walsh cover element for receiving said orthogonal channels and scaling said orthogonal channels to provide scaled channels.
Claim 28
Dependent Claim
17 words
The transmitter of claim 25 wherein said each of said parallel channels has a fixed data rate.
Claim 29
Dependent Claim
29 words
The transmitter of 25 further comprising: a multiplexer connected to said gain element, said multiplexer multiplexing pilot and power control bursts with said scaled channels to provide Walsh channels.
Claim 30
Dependent Claim
29 words
The transmitter of 25 further comprising: a multiplexer connected to said gain element, said multiplexer multiplexing pilot and power control bursts with said scaled channels to provide Walsh channels.
Claim 31
Dependent Claim
21 words
The transmitter of claim 27 wherein said pilot and power control bursts are located at fixed locations within each time slot.
Claim 32
Dependent Claim
21 words
The transmitter of claim 27 wherein said pilot and power control bursts are provided at two locations within each time slot.
Claim 33
Dependent Claim
27 words
The transmitter of claim 25 further comprising: a multiplexer connected to said gain element, said multiplexer multiplexing a preamble with said scaled channels to provide Walsh channels.
Claim 34
Dependent Claim
30 words
The transmitter of claim 25 further comprising: a scrambler interposed between said frame puncture element and said variable rate controller, said scrambler scrambling said punctured packets with a scrambling sequence.
Claim 35
Dependent Claim
17 words
The transmitter of claim 25 wherein said each of said Walsh covers is 16 bits in length.
Claim 36
Independent Claim
135 words
An apparatus for high speed packet data transmission from at least one base station to a mobile station comprising: means for measuring at the mobile station a set of parameters associated with forward link signals from said at least one base station; means for selecting at the mobile station a selected base station from said at least one base station based on said set of parameters; means for sending at every slot on a reverse link a rate control information message from the mobile station to said selected base station at every time slot on a reverse link; and means for receiving data at the mobile station from said selected base station at the data rate in accordance with said rate control information message if there is a data packet directed to the mobile station.
Claim 37
Independent Claim
135 words
An apparatus for high speed packet data transmission from at least one base station to a mobile station comprising: means for measuring at the mobile station a set of parameters associated with forward link signals from said at least one base station; means for selecting at the mobile station a selected base station from said at least one base station based on said set of parameters; means for sending at every slot on a reverse link a rate control information message from the mobile station to said selected base station at every time slot on a reverse link; and means for receiving data at the mobile station from said selected base station at the data rate in accordance with said rate control information message if there is a data packet directed to the mobile station.
Claim 38
Independent Claim
132 words
An apparatus for high speed packet data transmission from at least one base station to a mobile station comprising: means for measuring at the mobile station a set of parameters associated with forward link signals from said at least one base station; means for selecting at the mobile station a selected base station from said at least one base station based on said set of parameters; means for sending at every slot on a reverse link a rate control information message from the mobile station to said selected base station periodically on a reverse link; and means for receiving data at the mobile station from said selected base station at the data rate in accordance with said rate control information message if there is a data packet directed to the mobile station.
Claim 39
Independent Claim
132 words
An apparatus for high speed packet data transmission from at least one base station to a mobile station comprising: means for measuring at the mobile station a set of parameters associated with forward link signals from said at least one base station; means for selecting at the mobile station a selected base station from said at least one base station based on said set of parameters; means for sending at every slot on a reverse link a rate control information message from the mobile station to said selected base station periodically on a reverse link; and means for receiving data at the mobile station from said selected base station at the data rate in accordance with said rate control information message if there is a data packet directed to the mobile station.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-06-02 | 2006-12-02 | 2007-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-02 | 2010-12-02 | 2011-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-02 | 2014-12-02 | 2015-06-03 | $7700.00 | Window Closed / Lapsed |