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IEEE 802.16m standard redefined with many improvements on IEEE 802.16e standard to provide the best connectivity and to perform the error-free data transmission. In this paper, an improved Traffic based Duo triggered handoff algorithm for the buffer management is proposed to enhance the quality of service features in the air interface standard of IEEE 802.16 m. The standard aims to reduce overhead, improved coverage through optimized parameterization and excessive security measures. These parameters define the set of services that are provided for protection and they are agreed upon at the time of security association establishment. It includes the request and response of both the MS and the BS in order to measure the parametric values and the respective threshold values to find the optimum for handoff operations. Optimization in the threshold value is achieved through the calculation both SNR and delay in a combined manner to evaluate the heuristic handoff for a given scanning interval. We evident that our proposed system framework performs efficient handoff management with effort from base station scheduler and subscriber station scheduler. These processes incur least bandwidth underutilization thereby reducing the transmission delay under heavy traffic condition with QoS features conciliation.