Device-to-device (D2D) will be the future of wireless technology with low power, high data rate and low latency for information exchange between wireless devices. However it may not be always feasible because of mobility and influence of surroundings on the devices. This paper presents an approach to model and investigate D2D network at two millimeter wave (mmW) frequencies of 28 and 60 GHz, by calculating the received signal strength (RSS) and signal-to-interference-plus-noise-ratio (SINR). A generalized joint optimization problem to maximize the overall rate of the D2D network with regard to a device association vector algorithm (DAVA) is presented. Simulation results show network performance under different indoor scenarios using DAVA.