Dynamic spectrum distribution method based on covering frequency in heterogeneous wireless network
A heterogeneous wireless network and dynamic spectrum technology, applied in the field of dynamic spectrum allocation, can solve the problems that the user's SINR performance cannot be guaranteed, and the actual channel fading characteristics are not considered.
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[0047] Referring to the above-mentioned accompanying drawings, the specific implementation manners of the present invention will be described in further detail.
[0048] see figure 1 , a heterogeneous wireless network (HWN) scenario and a dynamic spectrum allocation DSA system model, in which multiple wireless networks coexist and form a HWN by sharing a core network. The network reconfiguration management module (Network Reconfiguration Manager, NRM) of the core network is responsible for managing the spectrum resources of the HWN, and periodically and dynamically allocates the spectrum to each cell base station according to the change of the cell service load. At the same time, NRM needs to control the interference between BSs to ensure that the BSs cover the user services of the cell.
[0049] Assuming that the thermal noise at the receiving end of the user is negligible, the signal-to-interference ratio (SIR) of the user is
[0050] SIR ...
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