Closed loop power control in a heterogeneous network by selecting among sets of accumulative power step values
First Claim
1. A method in a wireless device of a radio communications network, for controlling output transmission power from the wireless device, the method comprising:
- selecting one set among a plurality of sets that each contain a plurality of power step values, residing in a memory of the wireless device, responsive to criteria defined in the wireless device, by selecting a first one of the sets responsive to the criteria indicating that the wireless device is receiving signals from a first radio network node while transmitting to the first radio network node and by selecting a second one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the first radio network node while transmitting to a second radio network node, wherein at least some of the power step values are different between the sets;
receiving a power control command in a downlink from the first radio network node of a heterogeneous network that also includes the second radio network node, the first radio network node providing a different communication service cell size than the second radio network node;
selecting one of the power step values of the selected one of the sets responsive to the power control command; and
controlling the output transmission power from the wireless device responsive to the selected power step value.
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Accused Products
Abstract
A method is provided in a wireless device for controlling output transmission power from the wireless device. A set is selected among a plurality of sets of power step values, which reside in a memory of the wireless device, responsive to criteria defined in the wireless device. A power control command is received from a radio network node. One of the power step values of the selected set is selected responsive to the power control command. The output transmission power from the wireless device is controlled responsive to the selected power step value. Related methods in radio network nodes and apparatuses are disclosed.
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Citations
18 Claims
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1. A method in a wireless device of a radio communications network, for controlling output transmission power from the wireless device, the method comprising:
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selecting one set among a plurality of sets that each contain a plurality of power step values, residing in a memory of the wireless device, responsive to criteria defined in the wireless device, by selecting a first one of the sets responsive to the criteria indicating that the wireless device is receiving signals from a first radio network node while transmitting to the first radio network node and by selecting a second one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the first radio network node while transmitting to a second radio network node, wherein at least some of the power step values are different between the sets; receiving a power control command in a downlink from the first radio network node of a heterogeneous network that also includes the second radio network node, the first radio network node providing a different communication service cell size than the second radio network node; selecting one of the power step values of the selected one of the sets responsive to the power control command; and controlling the output transmission power from the wireless device responsive to the selected power step value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method in a radio network node of a radio communications network for controlling output transmission power from a wireless device of, the method comprising:
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selecting one set among a plurality of sets that each contain a plurality of power step values responsive to criteria defined in the radio network node, by selecting a first one of the sets responsive to the criteria indicating that the wireless device is receiving signals from a first radio network node while transmitting to the first radio network node and selecting a second one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the first radio network node while transmitting to a second radio network node, the first and second radio network nodes having different communication service cell sizes within a heterogeneous network, wherein at least some of the power step values are different between the sets; transmitting a set selection command to the wireless device responsive to the selected set to control the wireless device to select a corresponding one set among a plurality of sets that each contain a plurality of power step values residing in a memory of the wireless device; selecting one of the power step values of the selected set; and transmitting a power control command to the wireless device responsive to the selected power step value to control the wireless device to select a corresponding one of the power step values of the selected corresponding set residing in the memory of the wireless device for controlling the output transmission power from the wireless device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A wireless devices for use in a radio communications network, the wireless device comprising:
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at least one transceiver configured to communicate with a plurality of radio network nodes in the radio communications network; a memory configured to store a plurality of sets that each contain a plurality of power step values, wherein at least some of the power step values are different between the sets; and a processor circuit configured to select one set among the plurality of sets containing the power step values responsive to criteria defined in the wireless device, configured to receive a power control command. through the at least one transceiver from a first radio network node, configured to select one of the power step values of the selected set responsive to the power control command, and configured to control output transmission power from the at least one transceiver to a second radio network node responsive to the selected power step value, wherein the processor circuit selects the one set among the plurality of sets by selecting a first one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the first radio network node while transmitting to the first radio network node and by selecting a second one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the first radio network node while transmitting to the second radio network node.
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18. A radio network node of a radio communications network, the radio network node comprising:
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a network interface configured to receive measurement reports from another radio network node that contain power measurements of uplink signals received by the other radio network node from a wireless device; at least one transceiver configured to transmit signals to the wireless device; and a processor circuit configured to; select one among a plurality of sets that each contain a plurality of power step values responsive to criteria defined in the radio network node, by selecting a first one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the radio network node while transmitting to the radio network node and by selecting a second one of the sets responsive to the criteria indicating that the wireless device is receiving signals from the radio network node while transmitting to the other radio network node, wherein at least some of the power step values are different between the sets; transmit a set selection command through the at least one transceiver to the wireless device responsive to the selection set to control the wireless device to select a corresponding one set among a plurality of sets that each contain a plurality of power step values residing in a memory of the wireless device; select one of the power step values of the selected set responsive to one of the measurement reports; and transmit a power control command through the at least one transceiver to the wireless device responsive to the selected power step value to control the wireless device to select a corresponding one of the power step values contained in the selected corresponding set residing in the memory of the wireless device, for controlling the output transmission power from the wireless device to the other radio network node.
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Specification