Abstract
A wireless communication system includes an intermediate node a first node and a second node. A apparatus for implementing MIMO based network coding comprises the first node transmitting first data to the intermediate node and the second node transmitting second data to the intermediate node. Both the first node and the second node may use spatial multiplexing or time division multiplexing or frequency division multiplexing on a common/different resource. The intermediate node receives the transmissions from the first node and second node and performs network coding on the first data and second data using a predefined network coding scheme to produce network coded information. The intermediate node transmits the network coded information to the first node and second node using multi-user MIMO and each first or second node receives the MIMO transmissions from the intermediate node and applies network decoding procedures to recover the first data and second data.
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4G | 11/04/2012 | ISLD-201204-011 | APPLE INC | No | Family Member | ||||
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4G | 30/10/2013 | ISLD-201404-001 | APPLE INC | Yes | Basis Patent |
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Technologies
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Claim
1. An apparatus for implementing Multiple Input Multiple Output (MIMO) based network coding at an intermediate node in a wireless communication system, the wireless communication system including an intermediate node, a first node and a second node, the intermediate node including a plurality of antennas, the apparatus comprising:
means for receiving, by the intermediate node, first data from the first node;
means for receiving, by the intermediate node, second data from the second node;
means for storing the first data in a first queue and storing the second data in a second queue;
means for performing network coding on at least a portion of the first data from the first queue and at least a portion of the second data from the second queue using a network coding scheme to produce network coded information;
means for transmitting, by the intermediate node, the network coded information to the first node and second node using multi-user MIMO;
means for scheduling transmissions of packets from the first node and second node to the intermediate node, wherein a higher priority for said scheduling is given to the first node or the second node based on whichever one of the first queue and the second queue has a shorter queue length.
2. The apparatus of claim 1, wherein the transmission using multi-user MIMO is a spatial multiplex transmission.
3. The apparatus of claim 1, wherein the first data and the second data received at the intermediate node are transmitted to the intermediate node using one or more of spatial multiplexing, time division multiplexing, or frequency division multiplexing.
4. The apparatus of claim 1, wherein the first node belongs to a group of nodes all within a same coverage area.
5. The apparatus of claim 1, wherein the second node belongs to a group of nodes all within a same coverage area.
6. The apparatus of claim 1, wherein the network coding is implemented at the intermediate node by an exclusive OR (XOR) operation on the first data and with the second data.
7. The apparatus of claim 1, wherein the network coding scheme employed at the intermediate node is Decode and Forward (DF).
8. The apparatus of claim 1, wherein the intermediate node is one of a Relay Station (RS), Mobile Station (MS), and Base Station (BS).
9. A base station for implementing Multiple Input Multiple Output (MIMO) based network coding, the base station comprising:
a plurality of antennas;
a receiver configured to receive first data from a first mobile station and receive second data from a second mobile station, wherein the receiver is configured to store the first data in a first queue and store the second data in a second queue;
digital circuitry configured to perform network coding on at least a portion of the first data from the first queue and at least a portion of the second data from the second queue using a network coding scheme to produce network coded information;
a transmitter configured to simultaneously transmit the network coded information to the first mobile station and the second mobile station via the plurality of antennas using multi-user MIMO;
means for scheduling transmissions of packets from the first mobile station and the second mobile station to the base station, wherein a higher priority for said scheduling is given to the first mobile station or the second mobile station based on whichever one of the first queue and the second queue has a shorter queue length.
10. The base station of claim 9, wherein the transmission via the plurality of antennas using multi-user MIMO is a spatial multiplex transmission.
11. The base station of claim 9, wherein the first data and the second data are transmitted to the base station using one or more of spatial multiplexing, time division multiplexing, or frequency division multiplexing.
12. The base station of claim 9, wherein the first mobile station belongs to a first group of mobile stations within a first coverage area, wherein the second mobile station belongs to a second group of mobile stations within a second coverage area.
13. The base station of claim 9, wherein the first mobile station is configured to recover an estimate of the second data using the network coded information and the first data.
14. The base station of claim 9, wherein the network coding is implemented by an exclusive OR (XOR) operation on the first data and the second data.
15. The base station of claim 9, wherein the network coding scheme is Decode and Forward (DF).
16. A relay station for implementing Multiple Input Multiple Output (MIMO) based network coding, the relay station comprising:
a plurality of antennas;
a receiver configured to receive first data from a base station and receive second data from a mobile station, wherein the receiver is configured to store the first data in a first queue and store the second data in a second queue;
digital circuitry configured to perform network coding on at least a portion of the first data from the first queue and at least a portion of the second data from the second queue using a network coding scheme to produce network coded information;
a transmitter configured to simultaneously transmit the network coded information to the base station and the mobile station via the plurality of antennas using multi-user MIMO;
means for scheduling transmissions of packets from the base station and the mobile station to the relay station, wherein a higher priority for said scheduling is given to the base station or the mobile station based on whichever one of the first queue and the second queue has a shorter queue length.
17. The relay station of claim 16, wherein the transmission via the plurality of antennas using multi-user MIMO is a spatial multiplex transmission.
18. The relay station of claim 16, wherein the first data and the second data are transmitted to the relay station using one or more of spatial multiplexing, time division multiplexing, or frequency division multiplexing.
19. The relay station of claim 16, wherein the base station is configured to recover an estimate of the second data using the network coded information and the first data.
20. The relay station of claim 16, wherein the network coding scheme is Decode and Forward (DF).
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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.
Family member:related patents or applications that share a common priority or original filing.