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Table 2 Summary of implemented functionality.

From: Implementation of a Cooperative MAC Protocol: Performance and Challenges in a Real Environment

Role New functionality
Source (1) Helper selection, based upon CoopTable
  (2) Creation and insertion of a CoopHeader in the packet to be transmitted
Helper (1) Creation and insertion of a new CoopHeader in the packet to be relayed
  (2) Cooperative packet relay
Destination (1) Packet reception and payload extraction