TC văn học: nhấn mạnh vào việc giảm truyền tải điện năng, tức là, năng lượng tiêu thụ của bộ khuếch đại RF Trong các thiết lập thực tế, truyền tải điện năng chỉ đóng góp một phần tiêu thụ điện năng của bộ thu phát không dây Ví dụ: giấc ngủ: máy chạy không: rx: txmin: txmax tỷ lệ là | 5th ACM MobiHoc - Tokyo May 24 2004 More realistic energy models TC literature emphasis is on reducing the transmit power . the power consumed by the RF amplifier In practical settings the transmit power contributes only in part to the power consumption of the wireless transceiver Example the sleep idle rx txmjn txmax ratio is - 1 1 in a CISCO Aironet wireless card - 1 in a Medusa II sensor node Open issue how do these energy models impact the performance of TC protocols Istituto di ịỊỊ Informatica Open issues 6 11 e Telematica 5th ACM MobiHoc - Tokyo May 24 2004 More accurate analysis with mobility More work needs to be done to investigate the effect of mobility on TC - Is mobility beneficial or detrimental o On one hand mobility increases message overhead o On the other hand it balances the node energy consumption o Open issue which is the overall effect on network lifetime - Determination of the optimal frequency for reconfiguration o In general there is a trade off between the frequency of re-execution of the TC protocol and quality of the topology o Open issue given a certain constraint on the network lifetime or on the QoS and given a TC protocol which is the optimal frequency for reconfiguration o Preliminary step in this direction the determination of the information exchange period for the LMST protocol Li et Istituto di Informatica e Telematica Open issues 7 11 5th ACM MobiHoc - Tokyo May 24 2004 The effect of multi-hop traffic Implicit message in the current literature on TC the sparser communication graph the better Is this true if the designer goal is to extend network lifetime The effect of multi-hop data traffic must be carefully investigated - In a very sparse communication graph . the MST the average path length between source destination pairs is relatively long - Given the same quantity of packet delivered the overall number of messages circulating in the network is relatively larger .
