بیشینه‌سازی ظرفیت مؤثر در رله‌های نیمه دوطرفه دومسیره با بسته‌های کوچک

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی برق و کامپیوتر، دانشگاه سمنان، سمنان، ایران

چکیده

ارسال با بسته‌هایی با طول کوچک، ازجمله موضوعاتی است که در نسل جدید مخابراتی جهت برقراری ارتباطات کم تأخیر مورد توجه قرار گرفته است. در این مقاله نیز به‌منظور داشتن یک ارتباط کم تأخیر، سیستم مخابرات مشارکتی تحت سناریوی ارسال با بسته‌های کوچک بررسی شده است. در این سیستم رله نیمه دوطرفه دومسیره، اطلاعات دو گره را بین آنها جابجا می‌کند. رله از نوع تقویت و ارسال با گین ثابت و گین متغیر است. با توجه به اهمیت تأخیر، معیار ارزیابی عملکرد سیستم، ظرفیت مؤثر است و جهت بهبود عملکرد سیستم، از تخصیص توان بهینه جهت بیشینه‌سازی ظرفیت مؤثر استفاده شده است. تقعر این مسئله تخصیص توان تحت قید ثابت بودن مجموع توان گره‌ها و رله اثبات شده و مقدار توان بهینه برای گره‌ها و رله محاسبه شده است. در نهایت نیز تأثیر پارامترهای مختلف شامل طول بسته، نرخ خطای بیت و پارامتر کیفیت سرویس روی عملکرد کلی سیستم بررسی شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effective capacity Maximization in Two Way Half-Duplex Relays with Finite Blocklength Codes

نویسندگان [English]

  • M. Lari
  • Z. Keshavarz Gandomani
  • E. Maddah
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran
چکیده [English]

Short packet transmission is one of the topics considered in the new generation of telecommunication systems for low latency connections. In this paper, in order to have a low latency communication, a cooperative system with finite block length (FBL) transmission is investigated. In this relay system, a two-way half-duplex (HD) relay replaces data packets between two nodes. The two-way relay functionality is assumed as amplify-and-forward (AF) with fixed gain and variable gains. Due to the importance of delay, the criterion for evaluating system performance is the effective capacity. Therefore, to optimize the performance of the system, the optimal power allocation is used to maximize the effective capacity. The concavity of this power allocation problem under the assumption of constant total available power between nodes and relay is calculated. Finally, the effect of various parameters including packet length, bit error rate and quality-of-service (QoS) is investigated on overall system performance.

کلیدواژه‌ها [English]

  • Finite block length
  • Latency
  • Power allocation
  • Two way relay
  • Effective capacity

مراجع

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