MULTI-SITE MIMO COOPERATION IN CELLULAR NETWORKS
7 Assignments
0 Petitions
Accused Products
Abstract
A method of serving a given data stream to a target mobile terminal, in a cellular communications network that includes a plurality of transmitting sites wherein each transmitting site including at least one antenna, is provided. The method includes designating at least two of the plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; dividing the data stream into at least two sub-data streams, each of the sub-data streams for transmission over selected tones; and interlacing tones of the cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique. Other techniques for multi-site MIMO cooperation are also provided.
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Citations
56 Claims
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1-28. -28. (canceled)
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29. A system in a cellular communications network a system configured to serve a given data stream to a target mobile terminal, the system comprising:
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a plurality of transmitting sites wherein each transmitting site comprises at least one antenna; and the system further configured to; designate at least two of said plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; divide said data stream into at least two sub-data streams, each of said sub-data streams for transmission over selected tones; and interlace tones of said cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique. - View Dependent Claims (30, 31, 32, 33, 34, 35, 44)
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36. A system in a cellular communications network for serving a data stream to a target mobile terminal comprising:
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a plurality of transmitting sites; and the system configured to; designating a first transmitting site and a second transmitting site as cooperating sites; at said first transmitting site, transmitting said data stream to said mobile terminal in accordance with a beamforming technique; and at said second transmitting site, transmit said data stream to said mobile terminal in accordance with a beamforming technique, wherein said beam transmitted by said second transmitting site is adjusted to result in constructive addition of beams arriving at said target mobile terminal from said first and said second transmitting sites. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 45, 46)
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47. A system in a cellular communications network for serving a target mobile terminal comprising:
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a plurality of transmitting sites; and the system configured to; designate at least two of said plurality of transmitting sites as a cooperating site; designate one transmitting site of said cooperating site as a serving site; designate a non-serving transmitting site as a phase reference site; assign a fixed precoder to said phase reference site; at said serving site, receive an indicator of a precoder for phase correction; and encode transmissions to said target mobile device using said indicated precoder. - View Dependent Claims (48, 49, 50, 51)
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52. A system in a cellular communications network for serving a target mobile terminal, the system comprising:
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a plurality of transmitting sites; the system configured to; designate two unique subsets of transmitting sites as a first and second cooperating site; employ closed loop techniques within each cooperating site; and employ open loop cooperation techniques between cooperating sites. - View Dependent Claims (53, 54, 55, 56)
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Specification