隨著隨著網路技術的進步，有越來越多的多媒體傳輸能夠被使用者來應用，為了要達到使用者所需要的服務品質保證，一個有效率的資源預留機制是必須的。
我們所提出的方法就是先將連線的種類根據其特性，分成不同的等級，利用一個混合式的換手預測來再加上一個可以動態調整的資源預留機制為不同等級的連線預留不同程度的資源，藉此來提供不同程度的服務品質保證。

透過軟體模擬，我們發現這個機制不但可以大幅降低因為換手所造成的失敗率，同時也不會造成系統的使用率降低，避免了服務品質的下降，所以我們所提出的方法很適合在未來的第三代行動通訊系統中使用。

The advancement of wireless technologies has enabled multimedia services in mobile cellular networks. An efficient bandwidth management is needed to guarantee the QoS requirement for the multimedia services. In this thesis, we propose a dynamic handoff reservation (DHR) scheme based on a hybrid prediction mechanism. The prediction mechanism uses four kinds of information (distance, received signal strength, orientation, and mobility pattern) to estimate the handoff probability. The dynamic reservation scheme has two features: 1) The reservation for multiclass traffic is supported. 2) The bandwidth reserved for handoff calls is sharable to achieve the higher bandwidth utilization and a lower handoff call dropping rate. The simulation results show that the proposed scheme provides superior system throughput under homogeneous and heterogeneous traffic loading conditions.

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