Channel feedback for TDM scheduling in heterogeneous networks having multiple cell classes
First Claim
1. A method, comprising:
- receiving in a mobile communication terminal a sequence of downlink frames from a communication network that includes multiple cells arranged in at least first and second layers, wherein the first layer corresponds to a first class of the cells selected from a group of classes consisting of macro-cells, micro-cells, pico-cells, femto-cells and low-power nodes (LPN), and wherein the second layer corresponds to a second class of the cells that is different from the first class;
identifying in the sequence one or more cross-layer frames in which at least a first cell in the first layer and at least a second cell in the second layer transmit data;
identifying in the sequence one or more same-layer frames in which only one or more of the cells in a single layer that currently serves the terminal transmit the data;
calculating cross-layer channel feedback over the cross-layer frames, and calculating same-layer channel feedback over the same-layer frames; and
transmitting the cross-layer channel feedback and the same-layer channel feedback from the terminal.
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Abstract
A method includes receiving in a communication terminal a sequence of downlink frames from a communication network that includes multiple cells arranged in first and second layers. The first layer corresponds to a first class of cells selected from a group of classes consisting of macro-cells, micro-cells, pico-cells, femto-cells and low-power nodes (LPN). The second layer corresponds to a second class of cells, different from the first class. One or more cross-layer frames in which at least a first cell in the first layer and at least a second cell in the second layer transmit data, and one or more same-layer frames in which only one or more of the cells in a single layer that currently serves the terminal transmit the data, are identified in the sequence. Cross-layer channel feedback is calculated over the cross-layer frames, and same-layer channel feedback is calculated over the same-layer frames.
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Citations
26 Claims
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1. A method, comprising:
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receiving in a mobile communication terminal a sequence of downlink frames from a communication network that includes multiple cells arranged in at least first and second layers, wherein the first layer corresponds to a first class of the cells selected from a group of classes consisting of macro-cells, micro-cells, pico-cells, femto-cells and low-power nodes (LPN), and wherein the second layer corresponds to a second class of the cells that is different from the first class; identifying in the sequence one or more cross-layer frames in which at least a first cell in the first layer and at least a second cell in the second layer transmit data; identifying in the sequence one or more same-layer frames in which only one or more of the cells in a single layer that currently serves the terminal transmit the data; calculating cross-layer channel feedback over the cross-layer frames, and calculating same-layer channel feedback over the same-layer frames; and transmitting the cross-layer channel feedback and the same-layer channel feedback from the terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus, comprising:
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a receiver, which is configured to receive a sequence of downlink frames from a communication network that includes multiple cells arranged in at least first and second layers, wherein the first layer corresponds to a first class of the cells selected from a group of classes consisting of macro-cells, micro-cells, pico-cells, femto-cells and low-power nodes (LPN), and wherein the second layer corresponds to a second class of the cells that is different from the first class; control circuitry, which is configured to identify in the sequence one or more cross-layer frames in which at least a first cell in the first layer and at least a second cell in the second layer transmit data, to identify in the sequence one or more same-layer frames in which only one or more of the cells in a single layer that currently serves the apparatus transmit the data, to calculate cross-layer channel feedback over the cross-layer frames, and to calculate same-layer channel feedback over the same-layer frames; and a transmitter, which is configured to transmit the cross-layer channel feedback and the same-layer channel feedback to the communication network. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification