Table 3 Analysis of the predefined based slots allocation
MAC protocol | Data reliability | Energy consumption | Remarks |
|---|---|---|---|
E-MAC [34] | Low | High | Each sensor waits and transmits data in the predefined time slot. For data transmission, sensors change the format of Superframe according to the needs of a patient’s data. With these changes, sensors consume a higher energy during which create overhead to execute all fields of Superframe structure |
PE-MAC [41] | Medium | High | Sensors consume more energy in the wakeup radio and main radio state transitions. The waiting based transmission of emergency data in the pre-allocated time increases a chance of dropping data. The Low and high threshold values are not considered in this scheme |
EL-MAC [42] | Low | High | Sensor consumes a high energy due to outnumbers of the control overheads and faces a higher delay which is not appropriate for a life critical patient’s data |