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The QoS and Energy Consumption Efficiency Trade-off Model Based on Utility Function in WBAN

The wireless body area network(WBAN) has a wide range of applications in the medical field. However, the energy carried by the sensors in WBAN is limited, and the battery is not easy to replace. Therefore, how to use limited energy to bring higher service quality is particularly important. A cross-layer based model is proposed for trade-off between quality of service (QoS) and energy efficiency in this paper. The maximum utility function is used to automatically weigh the QoS and energy consumption efficiency to ensure the effectiveness and fairness of the WBAN system. It can achieve the purpose of improving energy efficiency as much as possible on the premise of ensuring user's QoS, thereby extending the life cycle of the WBAN.