We discussed multi-cell scheduling in Example 7.2. In this problem, we will investigate a different.
We discussed multi-cell scheduling in Example 7.2. In this
problem, we will investigate a different multi-cell scheduling system. Consider
a cellular network consisting of two cells. The cells use the same frequency
band, and employ time division to avoid interference. Unlike Example 7.2, each
cell performs its own scheduling due to insufficient backhaul. Instead, the
following coordination is in place: Each cell area is divided into an inner
zone and an outer zone. When both cells have picked users from the inner zone,
they use one timeslot to transmit simultaneously. Otherwise, they allocate two
timeslots for sending the packets, i.e., one slot for each. Assume that the
cells always have data to transmit. a) How much throughput increase can we
expect compared to static time division? The inner zone radius is assumed to be
0.7Do. b) What is the inner zone radius that gives a 30% throughput improvement
over static time division?