With the dense deployment of small cells in the next generation of mobile networks. the users from different tiers suffer from high downlink interferences. In this paper. we propose a game theoretic approach for joint co-tier and cross-tier collaboration in heterogeneous networks and analyze the relevance of the proposed scheme. https://www.markbroyard.com/save-big-quest-mv40-gas-floor-fryer-40-lb-casters-natural-gas-discount-best-mega/