一種基于非正交多址接入的動(dòng)態(tài)上行鏈路隨機(jī)接入方法

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中圖分類號(hào)：TN919.23 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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

終端設(shè)備在成功接入通信網(wǎng)絡(luò)后，方能建立穩(wěn)定的連接，實(shí)現(xiàn)數(shù)據(jù)的可靠傳輸，因此，網(wǎng)絡(luò)接入在通信網(wǎng)絡(luò)中占據(jù)至關(guān)重要的地位，其性能優(yōu)劣直接關(guān)聯(lián)到整體網(wǎng)絡(luò)性能和用戶體驗(yàn)[1-4]

傳統(tǒng)的基于正交多址接人（orthogonalmultipleaccess，OMA）技術(shù)[5-的隨機(jī)接人系統(tǒng)資源分配具有排他性，即一個(gè)資源塊由一個(gè)用戶獨(dú)占。（剩余12185字）