Method for transmitting packets in relay networks
First Claim
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1. A method for transmitting a packet in a relay network including a source node, a relay node and a destination node, comprising:
- partitioning, in a source node of a relay network, a packet into a first fragment and a second fragment, wherein the packet has L bits and the first fragment has β
L and the second fragment has (1−
β
)L bits, where β
is a splitting ratio;
transmitting the first fragment from the source node to a relay node of the relay network at a first data rate during a first phase;
transmitting the second fragment from the source node to a destination node in the relay network at a second data rate during a second phase;
combining the first fragments and the second fragment in the destination node;
retransmitting the first fragment from the relay node to the destination node at a third data rate during the second phase; and
optimizing the first, second and third data rates so that a total energy consumption in the network is minimized, wherein P0 is a power used by the source node during the first phase, ps is the power used by the source during the second phase, and pr is the power used by the relay node during the second phase and wherein a power gain between the source node s and the relay node r is |hsr|2, and the power gain between the relay node s and the destination node d is |hrd|2, and the combining is according to hsd and hrd, and wherein the energy consumption is minimized according to
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Abstract
A method transmits an L bit packet in a relay network including a source node, a relay node and a destination node. The source node partitions the packet into first fragment of βL bits and a second fragment of (1−β) bits. The first fragment is transmitted from the source node to the relay node at a first data rate during a first phase. The second fragment is transmitted from the source node to the destination node at a second data rate during a second phase while the first fragment is retransmitted from the relay node to the destination node at a third data rate.
9 Citations
13 Claims
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1. A method for transmitting a packet in a relay network including a source node, a relay node and a destination node, comprising:
-
partitioning, in a source node of a relay network, a packet into a first fragment and a second fragment, wherein the packet has L bits and the first fragment has β
L and the second fragment has (1−
β
)L bits, where β
is a splitting ratio;transmitting the first fragment from the source node to a relay node of the relay network at a first data rate during a first phase; transmitting the second fragment from the source node to a destination node in the relay network at a second data rate during a second phase; combining the first fragments and the second fragment in the destination node; retransmitting the first fragment from the relay node to the destination node at a third data rate during the second phase; and optimizing the first, second and third data rates so that a total energy consumption in the network is minimized, wherein P0 is a power used by the source node during the first phase, ps is the power used by the source during the second phase, and pr is the power used by the relay node during the second phase and wherein a power gain between the source node s and the relay node r is |hsr|2, and the power gain between the relay node s and the destination node d is |hrd|2, and the combining is according to hsd and hrd, and wherein the energy consumption is minimized according to - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification