This book focuses on various problems of the operation of a WDM optical packet ring: design, packet scheduling, delivered QoS and efficiency of optical transport. The relationship between these issues is shown and a range of tools for dimensioning and network control is proposed. This synchronous optical packet ring with multiple data channels and a single control channel has been studied by the ANR ECOFRAME (2007-2010). The stations of the ring have tunable transmitters and WDM fixed receivers. For a given traffic matrix, a cost of configuration incorporating costs of using wavelengths (data...