The sectorized hexagonal model with mixed delay constraints is considered when both neighbouring mobile users and base stations can cooperate over rate-limited links. Each message is a combination of independent fast and slow bits, where the former are subject to a stringent delay constraint and cannot profit from cooperation. Inner and outer bounds on the multiplexing gain region are derived. The obtained results show that for small cooperation prelogs or moderate fast multiplexing gains, the overall performance (sum multiplexing gain) is hardly decreased by the stringent delay constraints on the fast bits. For large cooperation prelogs and large fast multiplexing gains, increasing the fast multiplexing gain by $Delta$ comes at the expense of decreasing the sum multiplexing gain by $3 Delta$.
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