Wireless network and method for adaptive opportunistic clustering for interference alignment in wireless networks
First Claim
Patent Images
1. A central scheduler for a distributed network is configured to schedule communications between transmitters and receivers of a plurality of transmitter-receiver pairs of the distributed network, wherein each transmitter-receiver pair includes a transmitter and an associated receiver, wherein the central scheduler is configured to:
- select a cluster of the transmitter-receiver pairs having greatest of a minimum singular value above a threshold of direct channel information of a direct channel between a transmitter and receiver of each of the pairs; and
instruct the transmitter-receiver pairs of the selected cluster to perform an interference alignment technique for direct communications therebetween, the interference alignment technique using channel state information,wherein in response to being instructed by the central scheduler, each transmitter of the selected cluster is configured to precode baseband signals in accordance with the interference alignment technique for transmission to an associated receiver of the selected cluster using the channel state information, andwherein each transmitter of the selected cluster is configured to concurrently transmit the precoded signals to an associated receiver using non-orthogonal subcarriers.
1 Assignment
0 Petitions
Accused Products
Abstract
Embodiments of a central scheduler and method for adaptive clustering are generally described herein. In some embodiments, a cluster of transmitter-receiver pairs is selected based on minimum singular values calculated from direct channel information and the selected pairs are instructed to perform an interference alignment technique.
-
Citations
15 Claims
-
1. A central scheduler for a distributed network is configured to schedule communications between transmitters and receivers of a plurality of transmitter-receiver pairs of the distributed network, wherein each transmitter-receiver pair includes a transmitter and an associated receiver, wherein the central scheduler is configured to:
-
select a cluster of the transmitter-receiver pairs having greatest of a minimum singular value above a threshold of direct channel information of a direct channel between a transmitter and receiver of each of the pairs; and instruct the transmitter-receiver pairs of the selected cluster to perform an interference alignment technique for direct communications therebetween, the interference alignment technique using channel state information, wherein in response to being instructed by the central scheduler, each transmitter of the selected cluster is configured to precode baseband signals in accordance with the interference alignment technique for transmission to an associated receiver of the selected cluster using the channel state information, and wherein each transmitter of the selected cluster is configured to concurrently transmit the precoded signals to an associated receiver using non-orthogonal subcarriers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for adaptive clustering performed by a central scheduler in a distrusted network comprising a plurality of transmitter-receiver pairs configured to communicate directly therebetween, the method comprising:
-
selecting a cluster of transmitter-receiver pairs having greatest of a minimum singular value above a threshold of direct channel information of a direct channel between a transmitter and receiver of each of the pairs; and instructing the transmitter-receiver pairs of the selected cluster to perform an interference alignment technique for direct communications therebetween when a target throughput rate can be achieved, wherein in response to being instructed by the central scheduler, each transmitter of the selected cluster is configured to precode baseband signals in accordance with the interference alignment technique for transmission to an associated receiver of the selected cluster using the channel state information, wherein each transmitter of the selected cluster is configured to concurrently transmit the precoded signals to an associated receiver using non-orthogonal subcarriers, and wherein performing the interference alignment technique provides an increase an overall achievable throughput for the pairs of the selected cluster. - View Dependent Claims (9, 10)
-
-
11. A method for adaptive clustering of transmitter-receiver pairs, the method comprising:
-
selecting a cluster of transmitter-receiver pairs having greatest of a minimum singular value of direct channel information above a threshold; and instructing the pairs of the selected cluster to perform an interference alignment technique when a target throughput rate can be achieved, wherein performing the interference alignment technique provides an increase an overall achievable throughput for the pairs of the selected cluster, wherein, in response to the instructing, a transmitter of each transmitter-receiver pair of the selected cluster is configured to precode baseband signals in accordance with the interference alignment technique for transmission to an associated receiver of each transmitter-receiver pair using channel state information, wherein the channel state information comprises both a direct-channel gain estimate and a cross-channel gain estimate, wherein the direct channel information comprises the direct-channel gain estimate, wherein the interference alignment technique comprises limiting interfering signals to a smaller signal space for improved decoding of desired signals, and wherein each transmitter-receiver pair is assigned a non-orthogonal channel resource for concurrent communication.
-
-
12. A central scheduler for a distributed wireless network configured to schedule communications between transmitters and receivers of a plurality of transmitter-receiver pairs of the distributed wireless network, wherein each transmitter-receiver pair includes a transmitter and an associated receiver, the central scheduler comprising:
-
circuitry to calculate a minimum singular value from direct channel information of a direct channel between a transmitter and receiver of each of the transmitter-receiver pairs; circuitry to select a cluster of the transmitter-receiver pairs having greatest of the minimum singular values above a threshold calculated for each of the transmitter-receiver pairs; and circuitry to instruct the transmitter-receiver pairs of the selected cluster to perform an interference alignment technique for direct communications therebetween when a target throughput rate can be achieved, wherein in response to being instructed by the central scheduler, each transmitter of the selected cluster is configured to precode baseband signals in accordance with the interference alignment technique for transmission to an associated receiver of the selected cluster using the channel state information, and wherein each transmitter of the selected cluster is configured to concurrently transmit the precoded signals to an associated receiver using non-orthogonal subcarriers.
-
-
13. A central scheduler for a wireless network comprising:
-
circuitry to calculate a minimum singular value from direct channel information of each of a plurality of transmitter-receiver pairs; circuitry to select a cluster of the transmitter-receiver pairs having greatest of the minimum singular values above a threshold calculated for each of the pairs; circuitry to instruct the pairs of the selected cluster to perform an interference alignment technique when a target throughput rate can be achieved; and circuitry to calculate a sum rate for the transmitter-receiver pairs of the selected cluster, wherein the circuitry to instruct is configured to instruct the pairs of the selected cluster to perform the interference alignment technique when the sum rate meets or exceeds the target throughput rate, and wherein the sum rate is calculated by summing a throughput of each of the transmitter-receiver pairs of the selected cluster if the pairs were to perform the interference alignment technique. - View Dependent Claims (14, 15)
-
Specification