Table 1 Design perspectives to achieve coexistence of heterogeneous systems.
From: Scheduling Heterogeneous Wireless Systems for Efficient Spectrum Access
Point of view | Approaches | |
|---|---|---|
Architectural | Change parts of the wireless systems for coexistence, such as modifying base-stations or mobile handsets alone to enable spectrum agility. | Design the whole system to be spectrum agile. |
Structural | Leverage existing protocol mechanisms, such as protocol messages, conditions or signals to coordinate channel access schedules. | Build-in interoperability mechanisms at the beginning of the protocol design phase, so that the new wireless system lives with other systems in constant dialog and harmony. |
Temporal | Share at microscale, which requires protocols to multiplex the spectrum resource at fine-grained millisecond levels, close to the hardware clock speed. | Share at macroscale, which requires to set up advance timetable at hour or day level for different wireless system to operate without running into each other's ways. |
Spectral | Monopoly, which allows a wireless system to occupy the spectrum completely for the protocol operations. | Commonwealth, which allows multiple systems to fragment the channel in frequency domain. |