Multi-criteria optimization for relaying in multi-hop wireless ad hoc and sensor networks
First Claim
1. A method for relaying in multi-criteria receiver-side relay election wireless networks, said method comprising:
- obtaining, at a node, a first criterion for analyzing receiver-side relay election;
obtaining, at the node, a second criterion for analyzing receiver-side relay election;
determining a tradeoff parameter;
weighting the first criterion with a first weighting parameter and the second criterion with a second weighting parameter, wherein a ratio of the first weighting parameter to the second weighting parameter comprises the tradeoff parameter;
aggregating the weighted first criterion and the weighted second criterion using an aggregation formula to obtain a single virtual criterion; and
ranking candidate relay nodes based on the single virtual criterion.
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Abstract
A generalized multi-parameter mapping function aggregates decision criteria into a single virtual criterion to rank the potential relay candidates. Optimal rules for next hop relay as applicable to both transmitter-side selection and receiver-side election based forwarding schemes are also provided. Examples of network performance based on two optimization criteria include one-hop progress (greediness) and packet success rate (link quality). A suitable mapping function trades off the greediness for link quality. Simulation information is provided that indicates that the implementation according to the mapping function outperforms the reported transmitter-side link-aware forwarding schemes.
3 Citations
18 Claims
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1. A method for relaying in multi-criteria receiver-side relay election wireless networks, said method comprising:
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obtaining, at a node, a first criterion for analyzing receiver-side relay election; obtaining, at the node, a second criterion for analyzing receiver-side relay election; determining a tradeoff parameter; weighting the first criterion with a first weighting parameter and the second criterion with a second weighting parameter, wherein a ratio of the first weighting parameter to the second weighting parameter comprises the tradeoff parameter; aggregating the weighted first criterion and the weighted second criterion using an aggregation formula to obtain a single virtual criterion; and ranking candidate relay nodes based on the single virtual criterion. - View Dependent Claims (2, 3, 4, 5)
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6. A method for optimizing a transmission of a wireless packet in a wireless network, said method comprising:
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using a mapping function to determine, with a processor of a transmission optimization system, a shape parameter that can be used to minimize the duration of an election between nodes in the wireless network and to reduce the probability of collision between contending potential relays; optimizing, with the processor of the transmission optimization system, the shape parameter to minimize the duration of an election between nodes in the wireless network and to reduce the probability of collision between contending potential relays; and resolving, with the processor of the transmission optimization system, contention among contending potential relays to elect a most suitable candidate as a next hop relay, wherein resolving contention among contending potential relays comprises determining a response time delay, Xi, based on;
Xi=gα
(di)=a(α
)diα
+b(α
)where α
is the shape parameter and di is forward progress. - View Dependent Claims (7, 8, 9, 10)
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11. A system for multi-criteria receiver-side relay elections in wireless networks, the system comprising:
a processor configured to; determine a tradeoff parameter; weight a first criterion with a first weighting parameter and a second criterion with a second weighting parameter, wherein a ratio of the first weighting parameter to the second weighting parameter comprises the tradeoff parameter; aggregate the first weighted criterion and the second weighted criterion using an aggregation formula; obtain a single virtual criterion with the aggregation formula; and rank candidate relay nodes based on the single virtual criterion. - View Dependent Claims (12, 13)
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14. A system that optimizes a transmission of a wireless packet in a wireless network, the system comprising:
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a processor configured to; determine a shape parameter for minimizing duration of an election between nodes in the wireless network and reducing probability of collision between potential relays; optimize the shape parameter to minimize duration of an election between nodes in the wireless network and to reduce probability of collision between contending potential relays; and resolve contention among contending potential relays to elect a most suitable candidate as a next hop relay, wherein resolving contention among contending potential relays comprises determining a response time delay, Xi, based on;
Xi=gα
(di)=a(α
)diα
b+b(α
)where α
is the shape parameter and di is forward progress. - View Dependent Claims (15, 16, 17, 18)
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Specification