Architecture to support network-wide multiple-in-multiple-out wireless communication
First Claim
1. A method performed in a controller, comprising:
- determining, at the controller, at least one relative delay between signals transmitted over a plurality of backhaul links that communicatively couple the controller and a plurality of radio heads;
transmitting, from the controller to the plurality of radio heads over the plurality of backhaul links, information indicative of a first signal; and
providing timing information from the controller to the plurality of radio heads over the plurality of backhaul links, the timing information being determined based on said at least one relative delay such that the plurality of radio heads can use the provided timing information to control transmission of the first signal for coherent combination at a receiver.
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Accused Products
Abstract
The present invention provides a method of coordinating transmission by and reception by a plurality of antennas associated with a plurality of radio heads. The method includes determining, at a controller, at least one relative time delay associated with a plurality of backhaul links between the controller and the plurality of radio heads. The method also includes providing information indicative of a first signal over the plurality of backhaul links. The method further includes providing timing information over the plurality of backhaul links. The timing information is determined based on the relative time delay(s) such that the plurality of radio heads can use the provided timing information to coherently transmit the first signal using the plurality of antennas and a plurality of controllers to receive mobile unit transmitted information.
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Citations
39 Claims
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1. A method performed in a controller, comprising:
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determining, at the controller, at least one relative delay between signals transmitted over a plurality of backhaul links that communicatively couple the controller and a plurality of radio heads; transmitting, from the controller to the plurality of radio heads over the plurality of backhaul links, information indicative of a first signal; and providing timing information from the controller to the plurality of radio heads over the plurality of backhaul links, the timing information being determined based on said at least one relative delay such that the plurality of radio heads can use the provided timing information to control transmission of the first signal for coherent combination at a receiver. - View Dependent Claims (2, 3, 4, 5, 6, 22)
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7. A method, comprising:
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receiving, at one of a plurality of radio heads over one of a plurality of backhaul links between a controller and the plurality of radio heads, information indicative of a first signal; receiving, at said one of the plurality of radio heads over said one of the plurality of backhaul links, timing information determined based on at least one relative delay between signals transmitted over the plurality of backhaul links; and transmitting the first signal at a time indicated by the provided timing information so that the first signal coherently combines at a receiver with transmissions of the first signal by at least one other radio head. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method, comprising:
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receiving, over a plurality of backhaul links between a controller and a plurality of radio heads, information indicative of at least one first signal transmitted by at least one transmitter and received by the plurality of radio heads; and combining, coherently, said information received over the plurality of backhaul links using at least one relative delay between signals transmitted over the plurality of backhaul links. - View Dependent Claims (14, 15, 16)
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17. A method, comprising:
transmitting, over a first backhaul link between a first radio head and a controller, information indicative of at least one first signal received from a mobile unit by the first radio head such that said at least one first signal received by the first radio head can be coherently combined with information indicative of said at least one first signal received by at least one other radio head and transmitted over at least one other backhaul link from said at least one other radio head to the controller, said coherent combination being performed by the controller using at least one relative delay between signals transmitted over the first and at least one other backhaul links. - View Dependent Claims (18, 19, 20)
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21. A method, comprising:
coherently combining signals communicated over an air interface between a mobile unit and a plurality of radio heads using at least one relative delay between signals transmitted over a plurality of backhaul links that communicatively couple a controller and the plurality of radio heads.
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23. A controller configured to coordinate transmission by a plurality of radio heads by:
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determining at least one relative delay between signals transmitted over a plurality of backhaul links that communicatively couple the controller and the plurality of radio heads; transmitting information indicative of a first signal to the plurality of radio heads over the plurality of backhaul links; and providing timing information to the plurality of radio heads over the plurality of backhaul links, the timing information being determined based on said at least one relative delay such that the plurality of radio heads can use the provided timing information to control transmission of the first signal for coherent reception at a receiver. - View Dependent Claims (24, 25, 26)
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27. A first radio head configured to operate in coordination with at least one other radio head by:
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receiving, at the first radio head over a first backhaul link between a controller and the first radio head, information indicative of a first signal; receiving, at the first radio head over the backhaul link, timing information determined based on at least one relative delay between signals transmitted over the first backhaul link and signals transmitted over at least one other backhaul link between the controller and said at least one other radio head; and transmitting the first signal at a time indicated by the provided timing information so that the first signal coherently combines at a receiver with transmission of another version of the first signal by said at least one other radio head. - View Dependent Claims (28, 29, 30)
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31. A controller, comprising:
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means for determining at least one relative delay between signals transmitted over a plurality of backhaul links that communicatively couple the controller and a plurality of radio heads; means for transmitting information indicative of a first signal to the plurality of radio heads over the plurality of backhaul links; and means for providing timing information to the plurality of radio heads over the plurality of backhaul links, the timing information being determined based on said at least one relative delay such that the plurality of radio heads can use the provided timing information to control transmission of the first signal for coherent reception at a receiver.
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32. A first radio head, comprising:
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means for receiving, over a first backhaul link between a controller and the first radio head, information indicative of a first signal; means for receiving, over the backhaul link, timing information determined based on at least one relative delay between a signal transmitted over the first backhaul link and at least one signal transmitted over at least one other backhaul link between the controller and at least one other radio head; and means for transmitting the first signal at a time indicated by the provided timing information so that the first signal coherently combines at a receiver with transmission of another version of the first signal by said at least one other radio head.
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- 33. A transmitter configured to transmit information indicative of a first signal and timing information for the first signal to a plurality of radio heads over a plurality of backhaul links between the transmitter and the radio heads such that each of the plurality of radio heads can control transmission of a version of the first signal for coherent combination at a receiver.
- 37. A first radio head configured to receive information indicative of a first signal and timing information for the first signal over a first backhaul link between a controller and the first radio head such that the first radio head can control transmission of a version of the first signal using the timing information for coherent combination at a selected location with at least one other version of the first signal transmitted by at least one other radio head.
Specification