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US 8,559,406 B2Granted
Method and apparatus for communications of data in a communication system
AssigneeQUALCOMM Incorporated
InventorsStein A. Lundby, Joseph P. Odenwalder
Life of this patent
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Abstract
A method and apparatus provides for efficient data rate control and power control processes by transmitting a primary and a secondary pilot channel associated with a data channel. The primary and secondary pilot channels are used for decoding the data. A ratio of power levels of the primary and secondary pilot channels is based on at least one of the data rate and payload size of the data channel. The power level of the primary pilot channel is maintained independent of at least one of data rate and payload size of the data channel. The power level of the secondary pilot channel may be adjusted based on at least one of data rate and payload size of the data channel.
Claims13
A method for communications of data, comprising:
- transmitting a primary pilot channel associated with a data channel on a reverse link, a primary pilot channel power being independent of a data channel rate, and the primary pilot channel being used for decoding the data channel;
- depending on channel conditions of the data channel, determining whether the primary pilot channel is insufficient;
- if the primary pilot channel is insufficient, transmitting a secondary pilot channel associated with said data channel on said reverse link, the secondary pilot channel being used solely for decoding the data channel;
- transmitting data on said data channel;
- determining at least one of data rate of said transmitting data on said data channel and payload size of said transmitting data on said data channel;
- and
- determining a ratio of power levels of said primary and secondary pilot channels based on at least one of said determined data rate and payload size.
4 more elements
A method for a communication system, comprising:
- receiving a primary pilot channel, a secondary pilot channel, and a data channel on a reverse link, wherein said primary and secondary pilot channels are associated with said data channel and power levels of the primary pilot channel and the secondary pilot channel are based on the data channel;
- decoding said received data channel based on channel information determined from said received primary and secondary pilot channels;
- and
- decoding a rate indicator channel, the rate indicator channel indicating at least one of a payload size and data rate of said data channel, the rate indicator channel being received from a transmitting end wherein the transmitting end transmits said primary pilot channel, secondary pilot channel and data channel, the decoding of the rate indicator channel based on at least one of received power level of said secondary pilot channel and a ratio of received power levels of said primary and secondary pilot channels.
1 more element
An apparatus comprising:
- a receiver for receiving a primary and secondary pilot channels and a data channel on a reverse link, wherein said primary and secondary pilot channels are associated with said data channel and power levels of the primary pilot channel and the secondary pilot channel are based on the data channel;
- a decoder for decoding said data on said received data channel based on channel information determined from said received primary and secondary pilot channels;
- and
- wherein said decoder is further configured for:
- decoding a rate indicator channel, the rate indicator channel indicating at least one of a payload size and data rate of said data channel, the rate indicator channel being received from a transmitting end wherein the transmitting end transmits said primary pilot channel, secondary pilot channel and data channel, the decoding of the rate indicator channel based on at least one of received power level of said secondary pilot channel and a ratio of received power levels of said primary and secondary pilot channels.
2 more elements
A non-transitory computer-readable media including computer-executable instructions for performing a method for a communication system, the method comprising:
- receiving a primary pilot channel, a secondary pilot channel and a data channel on a reverse link, wherein said primary and secondary pilot channels are associated with said data channel and power levels of the primary pilot channel and the secondary pilot channel are based on the data channel;
- and
- decoding said received data channel based on channel information determined from said received primary and secondary pilot channels;
- and
- decoding a rate indicator channel, the rate indicator channel indicating at least one of a payload size and data rate of said data channel, the rate indicator channel being received from a transmitting end wherein the transmitting end transmits said primary pilot channel, secondary pilot channel and data channel, the decoding of the rate indicator channel based on at least one of received power level of said secondary pilot channel and a ratio of received power levels of said primary and secondary pilot channels.
2 more elements
A method for a communication system, comprising:
- receiving a primary pilot channel and a data channel on a reverse link, wherein said primary pilot channel is associated with said data channel;
- determining whether a secondary pilot channel associated with the data channel is transmitted by searching for an energy level of the secondary pilot channel above energy level of the primary pilot channel;
- combining the primary pilot channel and the secondary pilot channel to determine an estimate of propagation channel associated with the data channel;
- and
- decoding said received data channel based on the estimate of the propagation channel determined from said received primary and secondary pilot channels.
2 more elements
A method for a communication system, comprising:
- receiving a primary pilot channel, selectively a secondary pilot channel, and a data channel on a reverse link, wherein said primary and secondary pilot channels are associated with said data channel and power levels of the primary pilot channel and the secondary pilot channel are based on the data channel;
- decoding said received data channel based on channel information determined from said received primary and secondary pilot channels;
- and
- decoding a rate indicator channel, the rate indicator channel indicating at least one of a payload size and data rate of said data channel, the rate indicator channel being received from a transmitting end wherein the transmitting end transmits said primary pilot channel, secondary pilot channel and data channel, the decoding of the rate indicator channel based on at least one of received power level of said secondary pilot channel and a ratio of received power levels of said primary and secondary pilot channels.
1 more element
An apparatus comprising:
- a receiver for receiving a primary and selectively secondary pilot channels and a data channel on a reverse link, wherein said primary and secondary pilot channels are associated with said data channel and power levels of the primary pilot channel and the secondary pilot channel are based on the data channel;
- a decoder for decoding said data on said received data channel based on channel information determined from said received primary and secondary pilot channels;
- and
- wherein said decoder is further configured for:
- decoding a rate indicator channel, the rate indicator channel indicating at least one of a payload size and data rate of said data channel, the rate indicator channel being received from a transmitting end wherein the transmitting end transmits said primary pilot channel, secondary pilot channel and data channel, the decoding of the rate indicator channel based on at least one of received power level of said secondary pilot channel and a ratio of received power levels of said primary and secondary pilot channels.
2 more elements
A non-transitory computer-readable media including computer-executable instructions for performing a method for a communication system, the method comprising:
- receiving a primary pilot channel, selectively a secondary pilot channel and a data channel on a reverse link, wherein said primary and secondary pilot channels are associated with said data channel and power levels of the primary pilot channel and the secondary pilot channel are based on the data channel;
- decoding said received data channel based on channel information determined from said received primary and secondary pilot channels;
- and
- decoding a rate indicator channel, the rate indicator channel indicating at least one of a payload size and data rate of said data channel, the rate indicator channel being received from a transmitting end wherein the transmitting end transmits said primary pilot channel, secondary pilot channel and data channel, the decoding of the rate indicator channel based on at least one of received power level of said secondary pilot channel and a ratio of received power levels of said primary and secondary pilot channels.
1 more element
Dependencies are inferred from the claim text.