Packet transmission scheduling method for simultaneous packet transmission in multiplexing paths in wireless network, and packet transmission method using the same
AssigneeElectronics and Telecommunications Research Institute
InventorsHyunduk Kang, Heon-Jin Hong, Hyuk Lim, Daewon Jung
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Abstract
Provided are a packet transmission scheduling method in a wireless network and a packet transmission method using the same. The packet transmission scheduling method, includes storing location information and a path loss exponent of each node on a multiplexing path; calculating a Signal-to-Interference and Noise Ratio (SINR) between nodes on a predetermined path based on the stored location information; when the calculated SINR exceeds a threshold, forming the paths as a path table; and scheduling packet transmission based on the formed path table.
Claims11
A packet transmission scheduling method in a wireless network for simultaneously transmitting packets from a gateway node to a plurality of receiver nodes, comprising:
- storing location information of the gateway node and the plurality of receiver nodes, and a path loss exponent of each multiplexing path in which one of the plurality of receiver nodes is located;
- selecting from the plurality of receiver nodes two receiver nodes that are at a predetermined distance from the gateway node, calculating a Signal-to-Interference and Noise Ratio (SINR) for one of the selected receiver nodes using a distance between the two selected receiver nodes and a corresponding path loss exponent, and when the calculated SINR exceeds a threshold, forming a path table that includes a path between the two selected receiver nodes to simultaneously transmit the packets from the gateway node to the two selected receiver nodes;
- and
- scheduling packet transmission based on the path table,
- wherein the packets are simultaneously transmitted by scheduling a transmission order with reference to the path table in the packet transmission for spatial reusability of a channel,
- wherein the path table includes a set of paths to simultaneously transmit the packets from the gateway node to the plurality of receiver nodes for the spatial reusability of the channels,
- wherein the packets are consecutively transmitted from the gateway node to the plurality of receiver nodes by a back off procedure, and
- wherein a back off value of the back off procedure is selected based on a minimal contention window size and a maximal contention window size.
A packet transmission method in a wireless network for simultaneously transmitting packets from a gateway node to a plurality of receiver nodes, comprising:
- storing location information of the gateway node and the plurality of receiver nodes, and a path loss exponent of each multiplexing path in which one of the plurality of receiver nodes is located;
- selecting from the plurality of receiver nodes two receiver nodes that are at a predetermined distance from the gateway node, calculating a Signal-to-Interference and Noise Ratio (SINR) for one of the selected receiver nodes, using a distance between the two selected receiver nodes and a corresponding path loss exponent, and when the calculated SINR exceeds a threshold, forming a path table that includes a path between the two selected receiver nodes to simultaneously transmit the packets from the gateway node to the two selected receiver nodes;
- scheduling packet transmission based on the path table
- setting up a back off time and counting a back off time for a back off procedure when a channel is in an idle state for a predetermined time;
- and
- when the counting is completed, transmitting the packets based on a scheduling result,
- wherein the packets are simultaneously transmitted by scheduling a transmission order with reference to the path table in the packet transmission for spatial reusability of the channel,
- wherein the path table includes a set of paths to simultaneously transmit the packets from the gateway node to the plurality of receiver nodes for the spatial reusability of the channel,
- wherein the packets are consecutively transmitted from the gateway node to the plurality of receiver nodes by the back off procedure, and
- wherein a back off value of the back off procedure is selected based on a minimal contention window size and a maximal contention window size.
Dependencies are inferred from the claim text.