Future broadband networks need to provide high capacity at low cost with increased revenue through enhanced services. WiMAX came up as one of the leading technologies, however, the 2.3 GHz and 2.5 GHz frequency bands allocated create two serious coexistence issues with the adjacent 2.4 GHz ISM band. First problem is to address radio interfaces that are located on two independent platforms and still possess the potential for mutual interference owing to close proximity to each other. The Adaptive Frame Reservation Scheme presented here extends the CTS frame reservation signaling defined in 802.11 specifications to a demand based and adaptive scheme. Second issue is to address the coexistence problem in multi-radio platforms where two or more radios are co-located, creating an even worse interference scenario. This can be managed by hardware signaling that can be made available between radio interfaces through OS control. The development of a smart Co-located Coexistence Controller is explored which continuously receives transmission, reception and sleep requests from attached interfaces and in return grant permissions.

翻译：未来宽带网络需要低成本提供高容量的宽带网络,并通过增强服务增加收入。WiMAX作为主要技术之一提出,所分配的2.3千兆赫和2.5千兆赫频带与相邻2.4千兆赫的ISM频带造成了两个严重的共存问题。第一个问题是解决位于两个独立平台上的无线电接口问题,这些接口由于彼此距离较近而仍然具有相互干扰的潜力。这里提出的适应框架保留计划将802.11规格中定义的CTS框架保留信号扩大到基于需求和适应性的计划。第二个问题是解决两个或两个以上无线电台合用地的多射线平台的共存问题,造成更糟糕的干扰情景。这可以通过通过OS控制在无线电接口之间提供硬件信号来管理。正在探索开发一个智能合用共位的共存控制器,不断接收来自附属接口和回赠许可的传输、接收和睡眠请求。