Adaptive channel reservation multiple access protocol based on differentiated traffic guarantee

面向差异化业务保障的自适应信道预约多址接入协议

School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China

Received: 1 March 2023

Abstract

Ad Hoc network is widely used because of its distributed flexibility, in which nodes may generate different types of traffic, and some high-priority traffic requires lower delay and other Quality of service (QoS) requirements. However, as the load of traffic increases, the probability of conflict increases significantly, which makes it difficult to guarantee the requirement of these traffic. It is significant to design the efficient multiple access protocol to ensure the quality of different kinds of traffic. Channel reservation mechanism is an important method to ensure QoS. However, the existing channel reservation mechanism does not fine-adjust reservation parameters according to the QoS when dealing with various traffic differently, and the differentiation mechanism is rough. In addition, it is difficult to ensure the performance of common services when low-latency services are met. Therefore, a differentiated service guarantee adaptive reservation mechanism (DSGARM) to solve the above problems is proposed. The core idea of the protocol is to provide differentiated services in detail according to the delay tolerance requirements of each business. Absolute reservation mechanism is used to guarantee delay-sensitive services, and relative reservation mechanism is used to service relatively delay-insensitive services. In the protocol, a model is established to design an adaptive algorithm to quantitatively calculate reservation parameters that meet the delay requirements. On the premise of prioritized reservation for various services, appropriate reservation parameters can be adjusted according to network conditions to ensure the delay tolerance requirements of each type of service. The present work can be widely applied to scenarios with differentiated business requirements. The simulation results show the advantages of the present protocol and have great practical significance.

摘要

在无中心节点网络中可能存在不同类型的业务, 部分高优先级业务具有严格的时延等服务质量(quality of service, QoS)需求。但当网络负载较重时, 冲突概率明显提高, 使得这些业务的需求难以得到保障, 如何设计高效的多址接入协议以保证不同种类业务的服务质量是重要的研究方向。信道预约机制是保证QoS的重要方法, 但现有信道预约机制对多种业务服务时, 通常没有根据服务质量需求和网络状况精细调整预约参数。因此针对以上问题提出了一种面向差异化业务保障的信道预约MAC协议(differentiated service guarantee adaptive reservation mechanism, DSGARM), 协议核心思想是针对每种业务的容忍时延需求和网络状况精细提供差异化服务, 协议中通过建立的数学模型设计自适应算法, 定量计算出满足时延需求的预约参数, 能够根据网络状况自适应调整合适的预约参数以保障每一类业务的时延需求。仿真结果说明了提出协议的优势, 具有较大的实际意义。