Reduction of HARQ Latency for URLLC 5G Services Based on Network Slicing and Massive MIMO Hybrid Beamforming

2020 ◽  
Vol 12 (7) ◽  
Author(s):  
Mohammad Emad Alolaby ◽  
Keyword(s):  
Quality Of Service ◽  
Data Streams ◽  
Massive Mimo ◽  
Low Latency ◽  
Major Contributor ◽  
Radio Network ◽  
Network Slicing ◽  
Hybrid Beamforming ◽  
Mimo Beamforming

Ultra-Reliable and Low-Latency Communications (URLLC) is one of the three generic 5G services and probably the most challenging one, with strict quality of service requirements of 99.999% or more reliability and less than 1 milliseconds (ms) radio latency. To achieve latency targets, contributors to latency need to be addressed. Hybrid automatic repeat request (HARQ) retransmissions are major contributor to latency and need to be limited. The objective of this paper is to study the benefit of using Massive MIMO (M-MIMIO) along with radio network slicing to reduce number of HARQ retransmissions. A practical type of M-MIMO beamforming named hybrid beamforming is used. The performance of the proposed system is evaluated with slicing, without slicing and by alternating number of data streams per user. This work highlights the importance of technology enablers, such as M-MIMO and network slicing, in addressing quality-of-service (QoS) latency requirements for URLLC applications.

scholarly journals Analisa Perbandingan Quality of Service Voice Over IP dengan Pengujian Codec Menggunakan Algoritma Low Latency Queuing

2017 ◽  
Vol 3 (2) ◽  
pp. 249-254
Author(s):  
Darmawan Darmawan ◽  
Yayan Syafriyatno
Keyword(s):  
Quality Of Service ◽  
Packet Loss ◽  
Packet Switching ◽  
Voice Over Ip ◽  
Low Latency ◽  
Delay Jitter

Voice over IP (VoIP) adalah solusi komunikasi suara yang murah karena menggunakan jaringan IP dibanding penggunaan telephone analog yang banyak memakan biaya. Dalam penerapannya, VoIP mengalami permasalahan karena menggunakan teknologi packet switching yang mana penggunaannya bersamaan dengan paket data sehingga timbul delay, jitter, dan packet loss.  Pada penelitian ini, algoritma Low Latency Queuing (LLQ) diterapkan pada router cisco. Algoritma LLQ merupakan gabungan dari algoritma Priority Queuing (PQ) dan Class Based Weight Fair Queuing (CBWFQ) sehingga dapat memprioritaskan paket suara disamping paket data. Algoritma LLQ ini diujikan menggunakan codec GSM FR, G722, dan G711 A-law. Hasil pengujian didapatkan nilai parameter yang tidak jauh berbeda dan memenuhi standar ITU-T.G1010. Nilai delay rata - rata terendah yaitu ketika menggunakan codec G722 sebesar 20,019 ms tetapi G722 memiliki rata - rata jitter yang terbesar yaitu 0,986 ms.  Codec dengan jitter rata – rata terkecil adalah G711 A-law sebesar 0,838 ms. Packet loss untuk semua codec yang diujikan adalah 0%.  Throughput pada paket data terbesar saat menggunakan codec GSM FR yaitu 18,139 kbps. Codec yang direkomendasikan adalah G711 A-law karena lebih stabil dari segi jitter dan codec GSM FR cocok diimplementasikan pada jaringan yang memiliki bandwitdh kecil.

scholarly journals A Lightweight Slice-Based Quality of Service Manager for IoT

IoT ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 49-75
Author(s):  
Antonio Oliveira-Jr ◽  
Kleber Cardoso ◽  
Filipe Sousa ◽  
Waldir Moreira
Keyword(s):  
Quality Of Service ◽  
Industry 4.0 ◽  
Farming Systems ◽  
Smart Manufacturing ◽  
Network Slicing ◽  
Wide Range ◽  
The Internet Of Things ◽  
Service Manager ◽  
Digital Farming

Industry 4.0 and digital farming rely on modern communication and computation technologies such as the Internet of Things (IoT) to provide smart manufacturing and farming systems. Having in mind a scenario with a high number of heterogeneous connected devices, with varying technologies and characteristics, the deployment of Industry 4.0 and digital farming solutions faces innovative challenges in different domains (e.g., communications, security, quality of service). Concepts such as network slicing and Software-Defined Networking (SDN) provide the means for faster, simpler, scalable and flexible solutions in order to serve a wide range of applications with different Quality-of-Service (QoS) requirements. Hence, this paper proposes a lightweight slice-based QoS manager for non-3GPP IoT focusing on different use cases and their varying requirements and characteristics. Our focus in this work is on non-3GPP IoT unlicensed wireless technologies and not specifically the end-to-end network slice perspective as described in 5G standards. We implemented and evaluated different QoS models in distinct scenarios in a real experimental environment in order to illustrate the potential of the proposed solution.

scholarly journals ANALISA PERFORMANSI COMBAT BTS ROOFTOP PADA JALUR TRANSMISI FIBER OPTIK METRO E

2016 ◽  
Vol 7 (3) ◽  
Author(s):  
Setiyo Budiyanto ◽  
Hanifah Diana
Keyword(s):  
Quality Of Service ◽  
Packet Loss ◽  
Internet Protocol ◽  
Base Station ◽  
Radio Network ◽  
Network Connection ◽  
Delay Jitter ◽  
Base Transceiver Station

Pada saat ini teknologi serat optik menjadi media transmisi yang layak diperhitungkan penggunaannya dalam penyediaan akses karena memiliki kapabilitas dan kapasitas  yang  paling  tinggi  dibandingkan  dengan  media  transmisi  lainnya.  Dalam menyediakan akses informasi dengan volume bandwidth yang besar, serat optik memiliki prospek yang menjanjikan. Akses microwave berbasis sistem multiplexing saat ini mulai digantikan perannya dengan akses serat optik berbasis Internet Protocol (IP) yang disebut dengan Metro Ethernet. Aplikasi  Metro  Ethernet  untuk  akses  ke  menara  Base  Station  Transceiver  (BTS) dan  Radio  Network  Connection  (RNC)  operator  selular  merupakan  salah  satu  tawaran yang  diberikan  oleh  jaringan  Metro  Ethernet  saat  ini.  Penggunaan  Ip  clock  sangat dibutuhkan pada Base Transceiver Station (BTS) untuk sinkronisasi jaringan sebagai jam global yang berasal dari jam GPS diakuisisi oleh sejumlah BTS. IP clock didistribusikan ke pengendali serta acuan  berbagai jaringan, dan dari sana ke jaringan perangkat akses, sehingga  terwujud  sinkronisasi  jaringan  komunikasi  konvergensi  antara  BTS  ke  RNC yang melewati Metro E dengan media transmisi Fiber Optik. Pada penelitian ini, penulis menganalisa permasalahan link BTS dengan IP Clock sebagai alarm monitoring dan kaitannya dengan kesesuaian V-lan pada jaringan tersebut. Perhitungan  dan  analisa  Quality  of  Service  (QOS)  dari  penggunaan  fiber  optik  sebagai media  transmisi  yang  melewati  Metro  E  pada  link  antara  BTS  ke  RNC,  dimana parameter-parameter pandukung yang digunakan seperti Delay, Jitter, Packet Loss, untuk memudahkan dalam mengetahui performansinya.Kata Kunci : Fiber Optik, Metro E, BTS, IP Clock, QoS

scholarly journals Slice Management for Quality of Service Differentiation in Wireless Network Slicing

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2745 ◽  
Author(s):  
Namwon An ◽  
Yonggang Kim ◽  
Juman Park ◽  
Dae-Hoon Kwon ◽  
Hyuk Lim
Keyword(s):  
Quality Of Service ◽  
Random Network ◽  
Service Differentiation ◽  
Traffic Flows ◽  
Average Throughput ◽  
Average Delay ◽  
Network Slicing ◽  
Management Scheme ◽  
Simulation Results

Network slicing is a technology that virtualizes a single infrastructure into multiple logical networks (called slices) where resources or virtualized functions can be flexibly configured by demands of applications to satisfy their quality of service (QoS) requirements. Generally, to provide the guaranteed QoS in applications, resources of slices are isolated. In wired networks, this resource isolation is enabled by allocating dedicated data bandwidths to slices. However, in wireless networks, resource isolation may be challenging because the interference between links affects the actual bandwidths of slices and degrades their QoS. In this paper, we propose a slice management scheme that mitigates the interference imposed on each slice according to their priorities by determining routes of flows with a different routing policy. Traffic flows in the slice with the highest priority are routed into shortest paths. In each lower-priority slice, the routing of traffic flows is conducted while minimizing a weighted summation of interference to other slices. Since higher-priority slices have higher interference weights, they receive lower interference from other slices. As a result, the QoS of slices is differentiated according to their priorities while the interference imposed on slices is reduced. We compared the proposed slice management scheme with a naïve slice management (NSM) method that differentiates QoS among slices by priority queuing. We conducted some simulations and the simulation results show that our proposed management scheme not only differentiates the QoS of slices according to their priorities but also enhances the average throughput and delay performance of slices remarkably compared to that of the NSM method. The simulations were conducted in grid network topologies with 16 and 100 nodes and a random network topology with 200 nodes. Simulation results indicate that the proposed slice management increased the average throughput of slices up to 6%, 13%, and 7% and reduced the average delay of slices up to 14%, 15%, and 11% in comparison with the NSM method.

scholarly journals Mixed Quality of Service in Cell-Free Massive MIMO

2018 ◽  
Vol 22 (7) ◽  
pp. 1494-1497 ◽  
Author(s):  
Manijeh Bashar ◽  
Kanapathippillai Cumanan ◽  
Alister G. Burr ◽  
Hien Quoc Ngo ◽  
H. Vincent Poor
Keyword(s):  
Quality Of Service ◽  
Massive Mimo
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