It is assumed that the duration of slots for the BS RS links and for the RS UE links is constant to preserve interference stationarity between cell clusters.
The saturation throughput S, as shown in Equation 5, is expressed as the ratio of the frame payload successfully transmitted in a slot and the average duration of a slot, where γ is the probability that a slot is labeled as ECFB, Nf is the number of frames in each A-MPDU, and Nb is the number of parallel beams towards multiple nodes.
Thus, the proposal is the spreading of a narrow-band noise signal by our developed multi-sequences in order to interfere all the SF channels approximately two times each N×T Slot, where T Slot is the time duration of one slot in the UMTS frame, as it can be seen in Fig. 2. Fig. 2 Time structure for the proposed multi-sequence jamming system.
The channel conditions remain constant for the duration of each slot but may change at slot boundaries.
Since users should listen to the medium until they obtain a transmission opportunity, the minimum duration of the slot requires at least one slot time of 802.11 (e.g., 4 μs for CCA + 5 μs for RX/TX turnaround).
Type 1 surgeries have an estimated duration of one slot, type 2 of two slots, and type 3 surgeries an estimated duration of three or more slots.
Let us assume that the total sensing energy required for classifying the occupancy of one slot(s) is X J. Then the total energy required for CUsense for sensing Z slot(s) is given in (16), where Z is the total number of the slot(s) sensed by CUsense in a finite duration of time slot(s): E sense = Z * X (16).
We set the duration of each slot such that one packet can be transmitted during a single slot.
The duration of a slot is assumed to be msec and the simulation lasts for 10,000 slots.
In this study, we consider a slotted communication model, where Tslot (dimension: [s]) denotes the duration of each slot.
