1. A method for relaying in multi-criteria receiver-side relay election wireless networks, said method comprising: obtaining a first criterion for analyzing receiver-side relay election; obtaining a second criterion for analyzing receiver-side relay election; optimizing a combination of the first criterion and the second criterion to form an aggregation formula; aggregating information from the first criterion and information from the second criterion based on the aggregation formula, said aggregating that obtains a single virtual criterion; and ranking relay candidates based on the single virtual criterion.