In a densely deployed distributed wireless network, there may be various types of traffic with differentiated Quality of Service (QoS) requirements. However, when the network is heavily loaded, the collision increases significantly, making it difficult to guarantee the QoS of traffic. Designing an efficient Medium Access Control (MAC) protocol to guarantee the QoS of different types of traffic is an essential research direction. Channel reservation mechanism is a promising approach to improving QoS. However, few studies have focused on the channel reservation mechanism for differentiated traffic. It is difficult to take into account both the QoS of real-time traffic and the collision issue for ordinary traffic. To address this issue, this paper proposes the Differentiated Service Guarantee Adaptive Reservation Mechanism (DSGARM) protocol. A hybrid reservation mechanism is proposed by combining the absolute reservation mechanism and the relative reservation mechanism. The absolute reservation mechanism is adopted for real-time traffic. Meanwhile, the relative reservation mechanism is adopted for ordinary traffic. An adaptive algorithm is proposed to calculate the reservation parameters that meet the delay requirements based on the network conditions. The proposed work can be widely applied in the densely deployed distributed wireless network with differentiated QoS requirements. In addition, this paper establishes a mathematical model for the proposed mechanism and theoretically analyzes the performance. Simulations verify that the mathematical model provides a good approximation of the protocol performance and demonstrates the advantages of the proposed protocol.

翻译：在密集部署的分布式无线网络中，可能存在多种具有差异化服务质量（QoS）要求的业务类型。然而，当网络负载较重时，冲突显著增加，导致业务QoS难以保障。设计高效的介质访问控制（MAC）协议以保证不同类型业务的QoS是一项重要的研究方向。信道预留机制是提升QoS的有效方法，但现有研究较少关注面向差异化业务的信道预留机制，难以同时兼顾实时业务的QoS保障与普通业务的冲突问题。针对这一问题，本文提出了差异化服务保障自适应预留机制（DSGARM）协议。通过结合绝对预留机制与相对预留机制，提出了一种混合预留方案：对实时业务采用绝对预留机制，同时对普通业务采用相对预留机制。进一步，提出了一种自适应算法，可根据网络条件计算满足时延要求的预留参数。该成果可广泛应用于具有差异化QoS需求的密集部署分布式无线网络。此外，本文建立了所提机制的数学模型并进行了理论性能分析。仿真验证表明，该数学模型能精确近似协议性能，并展示了所提协议的优越性。