METHOD AND APPARATUS FOR HIGH RATE PACKET DATA TRANSMISSION
First Claim
1. A method for high speed packet data transmission from at least one base station to a mobile station comprising the steps of:
- paging a mobile station of a pending data transmission;
measuring C/I of forward link signals from said at least one base station;
selecting a selected base station based on a set of parameters;
identifying said selected base station;
sending a data request message to said selected base station; and
transmitting data from said selected base station at a data rate in accordance with said data request message.
1 Assignment
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Accused Products
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.
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Citations
63 Claims
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1. A method for high speed packet data transmission from at least one base station to a mobile station comprising the steps of:
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paging a mobile station of a pending data transmission;
measuring C/I of forward link signals from said at least one base station;
selecting a selected base station based on a set of parameters;
identifying said selected base station;
sending a data request message to said selected base station; and
transmitting data from said selected base station at a data rate in accordance with said data request message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for high speed packet data transmission from at least one base station to a mobile station in a CDMA communication system comprising the steps of:
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first transmitting a pilot signal from each of said at least one base station;
measuring C/I of said pilot signals from said at least one base station;
selecting a selected base station based on a set of parameters;
identifying said selected base station;
sending a data request message to said selected base station; and
second transmitting data from said selected base station at a data rate in accordance with said data request message. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. An apparatus for high speed packet data transmission from at least one base station to a mobile station comprising:
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a transmitter within each of said at least one base station for transmitting paging messages within a forward link signal to said mobile station;
a receiver within said one mobile station for receiving said paging messages and performing C/I measurements of said forward link signals from said transmitters within said at least one base station;
a controller within each of said at least one mobile station, said controller connected to said receiver for receiving said C/I measurements, said controller identifying a selected base station;
a transmitter within said mobile station connected to said controller for transmitting data request messages; and
wherein said transmitter within said selected base station transmits data at a data rate in accordance with said data request message. - View Dependent Claims (50, 51, 52, 53)
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54. A method for high speed packet data transmission from a mobile station to at least one base station comprising the steps of:
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sending a request for high rate transmission at one of a plurality of supportable data rates on a reverse link signal;
receiving and granting said request for high rate transmission;
sending said grant to said mobile station; and
transmitting data at said one of a plurality of supportable data rates. - View Dependent Claims (55)
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56. A transmitter for high speed packet data transmission comprising:
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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. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63)
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Specification