Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system

Abstract

Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method one or more sets of terminals are formed for possible data transmission with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission and data is thereafter coded modulated and transmitted to each scheduled terminal from one or more transmit antennas assigned to the terminal.

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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
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Technologies

Scheduling

Product

Not Available

Use Cases

Wireless communication

Services

Not Available

Claim

1. A method for scheduling data transmission in a wireless communication system, the method comprising:
identifying one or more sets of terminals, each set including one or more terminals and corresponding to a hypothesis to be evaluated based on one or more criteria;
assigning a plurality of transmit antennas to the one or more terminals in each set;
evaluating performance of each hypothesis based on channel state information (CSI) associated with each terminal, the CSI being indicative of channel characteristics between the respective terminal and the corresponding transmit antennas; and
selecting at least one set of terminals to receive data transmission based, at least in part, on the performance of each hypothesis.', 'identifying one or more sets of terminals, each set including one or more terminals and corresponding to a hypothesis to be evaluated based on one or more criteria;', 'assigning a plurality of transmit antennas to the one or more terminals in each set;', 'evaluating performance of each hypothesis based on channel state information (CSI) associated with each terminal, the CSI being indicative of channel characteristics between the respective terminal and the corresponding transmit antennas; and', 'selecting at least one set of terminals to receive data transmission based, at least in part, on the performance of each hypothesis.

2. The method of claim 1 further comprising:
scheduling data transmission to the one or more terminals in the selected set.', 'scheduling data transmission to the one or more terminals in the selected set.

3. The method of claim 1 wherein each hypothesis comprises a plurality of sub-hypotheses each of which corresponding to one or more specific assignments of the transmit antennas to the one or more terminals in the respective set and wherein the performance of each hypothesis is evaluated based on performance of the corresponding sub-hypotheses.

4. The method of claim 1, wherein the CSI for each terminal comprises signal-to-noise-plus-interference ratio (SNR) estimates derived at the respective terminal based on signals transmitted from the transmit antennas.

5. The method of claim 1, wherein the evaluating includes:
computing a performance metric for each hypothesis as a function of throughput achievable by each terminal in the respective set.', 'computing a performance metric for each hypothesis as a function of throughput achievable by each terminal in the respective set.

6. The method of claim 1, wherein the plurality of transmit antennas are assigned to the one or more terminals in each set based on priority of terminals in the set.

7. The method of claim 6, wherein the priority of each terminal is determined based on one or more factors including quality of service (QoS) associated with the respective terminal.

8. An apparatus for managing data transmission in a wireless communication system, the apparatus comprising:
means for identifying one or more sets of terminals, each set including one or more terminals and corresponding to a hypothesis to be evaluated based on one or more criteria;
means for assigning a plurality of transmit antennas to the one or more terminals in each set;
means for evaluating performance of each hypothesis based on channel state information (CSI) associated with each terminal, the CSI being indicative of channel characteristics between the respective terminal and the corresponding transmit antennas; and
means for selecting at least one set of terminals to receive data transmission based, at least in part, on the performance of each hypothesis.', 'means for identifying one or more sets of terminals, each set including one or more terminals and corresponding to a hypothesis to be evaluated based on one or more criteria;', 'means for assigning a plurality of transmit antennas to the one or more terminals in each set;', 'means for evaluating performance of each hypothesis based on channel state information (CSI) associated with each terminal, the CSI being indicative of channel characteristics between the respective terminal and the corresponding transmit antennas; and', 'means for selecting at least one set of terminals to receive data transmission based, at least in part, on the performance of each hypothesis.

9. The apparatus of claim 8 further comprising:
means for scheduling data transmission to the one or more terminals in the selected set.', 'means for scheduling data transmission to the one or more terminals in the selected set

10. The apparatus of claim 8 wherein each hypothesis comprises a plurality of sub-hypotheses each of which corresponding to one or more specific assignments of the transmit antennas to the one or more terminals in the respective set and wherein the performance of each hypothesis is evaluated based on performance of the corresponding sub-hypotheses

11. The apparatus of claim 8, wherein the CSI for each terminal comprises signal-to-noise-plus-interference ratio (SNR) estimates derived at the respective terminal based on signals transmitted from the transmit antennas

12. The apparatus of claim 8, wherein means for evaluating includes:
means for computing a performance metric for each hypothesis as a function of throughput achievable by each terminal in the respective set.', 'means for computing a performance metric for each hypothesis as a function of throughput achievable by each terminal in the respective set

13. The apparatus of claim 8, wherein the plurality of transmit antennas are assigned to the one or more terminals in each set based on priority of terminals in the set

14. The apparatus of claim 13, wherein the priority of each terminal is determined based on one or more factors including quality of service (QoS) associated with the respective terminal.']

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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

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