Relay Coded Multi-User Cooperative Communications for Uplink 4G Wireless Networks
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsJinyun Zhang, Lei Cao
Life of this patent
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Abstract
Source nodes in an International Mobile Telecommunications (IMT)-advanced 4G network transmit data on uplink channels to a relay node and a BS using a channel code. The relay node decodes independently the data received from each source node, and applies network coding to data correctly decoded, and transmits the encoded data to the BS. The BS decodes the encoded data transmitted by the sources nodes and the relay nodes cooperatively via a turbo decoding process. The data from each source node are decoded by soft-input soft-output single user decoders and are decoded, together with the data from the relay node, by a soft-input soft-output multi-user decoder.
Claims18
A wireless International Mobile Telecommunications (IMT)-advanced 4G network including a set of source nodes, wherein the set of source nodes transmit data on uplink channels using a channel code, comprising:
- a relay node comprising:
- a receiver;
- a set of decoders, there being one decoder for each source node transmitting the data, and wherein the data are channel encoded, and wherein each decoder determines whether the data received from the source node are decoded correctly;
- a network encoder configured to encode the data correctly decoded, wherein each network encoder uses an invertible matrix over a binary finite field to encode the correctly decoded data;
- and
- a transmitter configured to transmit the network encoded data.
A method for communicating in a wireless International Mobile Telecommunications (IMT)-advanced 4G network including a set of source nodes, a relay node and a base station, wherein the set of source nodes transmit data on uplink channels to the relay node and the BS using a channel code, comprising:
- decoding independently, in the relay node, for each source node, the data that are channel coded;
- applying network coding to the data that are correctly decoded;
- transmitting the network encoded data to the BS;
- and
- decoding in the base station, the data that are channel coded by each source nodes using a set of single-user decoders, and decoding the data that are network encoded by the relay station using a multi-user decoder.
Dependencies are inferred from the claim text.