一种基于非正交多址接入的动态上行链路随机接入方法
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中图分类号：TN919.23 文献标志码：A 文章编号：1673-2340（2025）02-0039-09
Adynamicuplinkrandomaccess method based on non-orthogonal multiple access technology
YANGJing1，LIUYuxin1，GAORuil，ZHAO Jing²，DONGZhicheng³，ZHANG Zhenghual （l.School of Information Engineering，Yangzhou University，Yangzhou 225ll7，China;
SchoolofNetworkandCommunicationEnginering，ChengduTechnologicalUniversityChengdu 6ll73o，China;
3.School of Information Science and Technology，TibetUniversity，Lhasa 85oooo，China）
Abstract： To address access collisions caused by massive user access in networks，a dynamic uplink random access method based onnon-orthogonal multipleaccess （NOMA） is proposed.The method incorporatesanadaptive resource allocation mechanism that dynamicallyadjusts time slot configurations and updates the accessclass baring （ACB）factor according to network conditions.After each round of random access，the system records the number of idle，succesful，andcollided time slots.These statisticsarethenused toestimate thenumberofremainingusers.The process is iterativelyrepeateduntilalluserssuccessullyaccessthenetwork.Toevaluate the proposed method，acomplete theoreticalanalysisframeworkisestablishedundertheNakagami- ⋅m fading channel environment，from which closed-form expressions foraccess success probabilityand system throughputare derived.Simulation results show that，compared with the traditional dynamic ACB-based NOMA random acessalgorithm （DNRA）and the fixed ACB-based orthogonal random-access algorithm （FORA），the proposed method improves system throughput by 30.41% and 48.22% ，respectively.Furthermore，under varying user loads，the method consistently achieves higher access success probabilities and maintains high system throughput across different network conditions.
Key words： non-orthogonal multiple access;random access;uplink;throughput; time slot allocation
终端设备在成功接入通信网络后，方能建立稳定的连接，实现数据的可靠传输，因此，网络接入在通信网络中占据至关重要的地位，其性能优劣直接关联到整体网络性能和用户体验[1-4]
传统的基于正交多址接人（orthogonalmultipleaccess，OMA）技术[5-的随机接人系统资源分配具有排他性，即一个资源块由一个用户独占。（剩余12185字）