近來感知無線電網路的研究主要在於媒體存取控制(MAC)層和實體(physical)層，在無線網路中，感知無線電也能夠有效地改善網路較上層的效能，尤其是在移動性的感知無線電隨意網路(CR-MANET)。在本篇文章中，我們提出分群路由協定用於移動性的感知無線電隨意網路，一個感知無線電網路將會被分割成許多不同的群組，每一個次級使用者只會知道與他相同群組次級使用者的連結狀況，以及群組在網路中的連結狀況。所有次級使用者會有次級使用者及群組階層的拓樸資訊。不分層的路由協定中，路由路徑包含了來源和目的端所有中間節點，任何一個中間連結斷裂，將會造成路徑失效，而在我們的協定中使用群組編號及次級使用者編號來做路由，不須紀錄來源和目的端中間所有節點，所以能夠適應改變的拓樸。模擬的結果，顯示我們的位置搜尋相對於目的序列距離向量路由(DSDV)有較少的通訊負擔，也顯示了我們的路由協定相對於需求距離向量路由(AODV)有較少的節點跳數及介面數，分群路由協定在相異的頻譜中建立了一個穩定的路徑且減少了控制負擔、節點跳數及介面數。

Recent research on cognitive radio networks has mainly focused on MAC and physical layers. However, cognitive radio has a significant impact on upper layer performance in wireless networks, particularly in cognitive radio mobile ad hoc networks (CR-MANETs). In this paper, we study routing issues and propose a Group-Based Routing Protocol (GBRP) for CR-MANET. The cognitive radio network is divided into several non-overlapping groups. Each Secondary user (SU) only knows the SU connectivity within its group and the group connectivity of the whole network. SU and group level topological information are distributed to all SUs. In the flat architecture routing protocols, routing path containing the SUs between a source and a destination is needed for routing. Any intermediate link breakage will invalidate the path. On the contrary, in GBRP, only the group ID and the SU ID of a destination are needed for routing. The actual routing path is adaptable to the changing topology. Simulation results show that our routing protocol generates less control overhead than the DSDV and the number of hop counts and interfaces used in our protocol are smaller than the AODV.

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