  This paper analyzes the multiplexing gains (MG) for simultaneous transmission
of delay-sensitive and delay-tolerant data over interference networks. In the
considered model, only delay-tolerant data can profit from coordinated
multipoint (CoMP) transmission or reception techniques, because delay-sensitive
data has to be transmitted without further delay. Transmission of
delay-tolerant data is also subject to a delay constraint, which is however
less stringent than the one on delay-sensitive data. Different coding schemes
are proposed, and the corresponding MG pairs for delay-sensitive and
delay-tolerant data are characterized for Wyner's linear symmetric network and
for Wyner's two-dimensional hexagonal network with and without sectorization.
For Wyner's linear symmetric also an information-theoretic converse is
established and shown to be exact whenever the cooperation rates are
sufficiently large or the delay-sensitive MG is small or moderate. These
results show that on Wyner's symmetric linear network and for sufficiently
large cooperation rates, the largest MG for delay-sensitive data can be
achieved without penalizing the maximum sum-MG of both delay-sensitive and
delay-tolerant data. A similar conclusion holds for Wyner's hexagonal network
only for the model with sectorization. In the model without sectorization, a
penalty in sum-MG is incurred whenever one insists on a positive
delay-sensitive MG.
