Method and apparatus for controlling transmit power of multiple channels in a CDMA communication system
First Claim
1. In a wireless communication system, a method for supporting power control for a plurality of channels via a common feedback stream, comprising:
- receiving a plurality of transmissions on the plurality of channels;
determining signal quality of the transmission received on each channel;
generating power control information for each channel based on the determined received signal quality for transmission received on the channel;
multiplexing power control information generated for the plurality of channels on a plurality of feedback substreams defined based on the feedback stream; and
transmitting the plurality of feedback substreams.
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Accused Products
Abstract
Techniques to support independent power control of multiple channels in CDMA systems (e.g., a W-CDMA system) that define a single power control feedback stream on the uplink, which is to be used for downlink power control. In one aspect, the single feedback stream is “time shared” among multiple channels requiring individual power control. Various time-sharing schemes may be used to implement multiple (substantially parallel) feedback substreams based on the single feedback stream, and different combination of feedback rates may also be achieved for the substreams. Each feedback substream may be assigned to, and used for power control of, a respective channel. In another aspect, multiple feedback substreams are implemented based on multiple fields in newly defined slot formats.
182 Citations
28 Claims
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1. In a wireless communication system, a method for supporting power control for a plurality of channels via a common feedback stream, comprising:
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receiving a plurality of transmissions on the plurality of channels;
determining signal quality of the transmission received on each channel;
generating power control information for each channel based on the determined received signal quality for transmission received on the channel;
multiplexing power control information generated for the plurality of channels on a plurality of feedback substreams defined based on the feedback stream; and
transmitting the plurality of feedback substreams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. In a W-CDMA communication system, a method for supporting independent power control for two channels via a common feedback stream, comprising:
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receiving two transmissions on the two channels;
determining signal quality of the transmission received on each channel;
generating power control information for each channel based on the determined received signal quality for transmission received on the channel;
multiplexing power control information generated for the two channels onto first and second feedback substreams defined based on the feedback stream, wherein the first feedback substream has a feedback rate of 1000 commands/second or greater and the second feedback substream has a feedback rate of 500 commands/ second or less; and
transmitting two feedback substreams.
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20. In a wireless communication system, a method for supporting power control for a plurality of channels via a plurality of feedback substreams, comprising:
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receiving a plurality of transmissions on the plurality of channels;
determining signal quality of the transmission received on each channel;
generating power control information for each channel based on the determined received signal quality;
multiplexing power control information generated for the plurality of channels on a plurality of feedback substreams, wherein each feedback substream is defined by a respective field in each slot of a feedback subchannel; and
transmitting the plurality of feedback substreams. - View Dependent Claims (21, 22, 23)
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24. A power control unit for use in a wireless communication system, comprising:
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a signal quality measurement unit configured to receive and process a plurality of transmissions on a plurality of channels to determine signal quality of the transmission received on each channel; and
a power control processor coupled to the signal quality measurement unit and configured to generate power control information for each channel based on the determined received signal quality, and to multiplex power control information generated for the plurality of channels onto a plurality of feedback substreams defined based on a single feedback stream. - View Dependent Claims (25, 26, 27, 28)
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Specification