Method, apparatus and computer program for power control related to random access procedures
First Claim
1. A method comprising:
- using a processor to initialize for i=0 a first power control adjustment state g(i) for an uplink control channel and a second power control adjustment state f(i) for an uplink shared channel to each reflect an open loop power control error;
using the processor to compute an initial transmit power for the uplink shared channel using full pathloss compensation, wherein the initial transmit power depends on a preamble power of a first message sent on an access channel, and is initialized with the second power control adjustment state f(0); and
sending from a transmitter a third message on the uplink shared channel at the initial transmit power.
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Accused Products
Abstract
A first power control adjustment state g(i) and a second power control adjustment state f(i) are initialized for i=0 to each reflect an open loop power control error. An initial transmit power for a shared uplink channel is computed using full pathloss compensation. The computed initial transmit power depends on a preamble power of a first message sent on an access channel, and the initial transmit power is initialized with the second power control adjustment state f(0). A third message is sent from a transmitter on an uplink shared channel at the initial transmit power. In various implementations, the power for i=0 on the uplink control channel is also initialized similar to the initial transmit power for the third message and using full pathloss compensation, and after the third message (and retransmissions of it), subsequent messages sent on the uplink shared channel are sent at a power that is computed using fractional pathloss compensation.
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Citations
20 Claims
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1. A method comprising:
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using a processor to initialize for i=0 a first power control adjustment state g(i) for an uplink control channel and a second power control adjustment state f(i) for an uplink shared channel to each reflect an open loop power control error; using the processor to compute an initial transmit power for the uplink shared channel using full pathloss compensation, wherein the initial transmit power depends on a preamble power of a first message sent on an access channel, and is initialized with the second power control adjustment state f(0); and sending from a transmitter a third message on the uplink shared channel at the initial transmit power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer readable memory storing a computer program that when executed by a processor results in actions comprising:
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initializing for i=0 a first power control adjustment state g(i) for an uplink control channel and a second accumulation power control adjustment state f(i) for an uplink shared channel to each reflect an open loop power control error; computing an initial transmit power for the uplink shared channel using full pathloss compensation, wherein the initial transmit power depends on a preamble power of a first message sent on an access channel, and is initialized with the second power control adjustment state f(0); and outputting the initial transmit power for transmission of a third message on the uplink shared channel. - View Dependent Claims (11)
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12. An apparatus comprising:
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a processor configured to initialize for i=0 a first power control adjustment state g(i) for an uplink control channel and a second accumulation power control adjustment state f(i) for an uplink shared channel to each reflect an open loop power control error, and configured to compute an initial transmit power for the uplink shared channel using full pathloss compensation, wherein the initial transmit power depends on a preamble power of a first message sent on an access channel, and is initialized with the second power control adjustment state f(0); and a transmitter configured to send a third message on the uplink shared channel at the initial transmit power. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification