Adaptive receiver in a non-orthogonal multiple access (noma) communication systems
AssigneeTelefronaktlenktiebolaget LM Erficsson (pub)
InventorBehrooz MAKKI
Life of this patent
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Abstract
An adaptive receiver for UEs using NOMA-based schemes. One objective is to improve the achievable rate of the weak UE and improve the fairness among the grouped UEs. At the same time, an embodiment gives the chance to reduce the error probability of the strong UE. Thus, compared to conventional NOMA, an embodiment increases the network sum throughput.
Claims22
A method performed by a network node serving a first user equipment (UE) and a second UE, the method comprising:
- the network node transmitting, during a first time slot, a first superimposed signal comprising a first message for the first UE and a second message for the second UE;
- the network node receiving a message transmitted by the first UE indicating that the first UE was unable to decode the first message;
- and
- after receiving the message transmitted by the first UE indicating that the first UE was unable to decode the first message, the network node providing to the second UE a message indicating that the first UE was unable to decode the first message, thereby enabling the second UE to select an appropriate decoding scheme to use in a subsequent time slot.
A method performed by a first user equipment (UE) that is being served by a network node, the method comprising:
- the first UE receiving, during a first time slot, a first superimposed signal, the first superimposed signal comprising a first message for the first UE and a second message for a second UE being served by the network node;
- and
- after receiving the first superimposed signal, the first UE obtains information that indicates that the second UE was unable to decode the second message and uses the obtained information to decode a third message for the first UE that is contained in a second superimposed signal received by the first UE.
A network node, the network node being adapted to:
- transmit, during a first time slot, a first superimposed signal comprising a first message for the first UE and a second message for the second UE;
- receive a message transmitted by the first UE indicating that the first UE was unable to decode the first message;
- and
- after receiving the message transmitted by the first UE indicating that the first UE was unable to decode the first message, provide to the second UE a message indicating that the first UE was unable to decode the first message, thereby enabling the second UE to select an appropriate decoding scheme to use in a subsequent time slot.
(canceled)
A first user equipment, the first user equipment (UE) being adapted to:
- receive, during a first time slot, a first superimposed signal, the first superimposed signal comprising a first message for the first UE and a second message for a second UE being served by the network node;
- after receiving the first superimposed signal, obtain information indicating that the second UE was unable to decode the second message;
- and
- use the obtained information to decode a third message for the first UE that is contained in a second superimposed signal received by the first UE.
(canceled)
(canceled)
Dependencies are inferred from the claim text.