A High Capacity 1D-Chaotic-Collaborative-CDMA Scheme for Shared Band 5G-IoT Operation
- PDF / 908,722 Bytes
- 8 Pages / 439.37 x 666.142 pts Page_size
- 23 Downloads / 133 Views
A High Capacity 1D‑Chaotic‑Collaborative‑CDMA Scheme for Shared Band 5G‑IoT Operation S. B. Sumith Babu1 · R. Kumar1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This paper presents a chaos based multi-group CDMA (CCCDMA) scheme employing a modified 1D-Bernoulli map for shared band operation of NB-IoT services with the legacy systems (LTE eNodeB’s). The proposed scheme addresses the capacity requirements for NB-IoT for a very low processing gain and compared with current researches on the topic with relevance to the 3GPP technical report (TR 36.752). Computer simulations reveal a maximum of 120 users can be supported by the CCCDMA scheme for a very low processing gain of N = 31 thereby providing an overloading of ≈ 4 at a reference probability of bit error of 10−3 for the IoT scenario. Thus, for a 20 channel system with W = 1 MHz in a 20 MHz band with 4 collaborating user groups, the CCCDMA-IoT scheme provides a Kmax of 2400 IoT UE’s for a 2 dB compromise on SNR. Keywords IoT · CCCDMA · NB-IoT · LTE · Multi-group CDMA · Multiple access interference
1 Introduction The fifth generation (5G) wireless communication is anticipated to deploy a significant number of Internet-of-Things (IoT). The biggest wireless tele-communications service provider in the United States, Verizon Wireless, is intending to retain the CDMA network for IoT devices. Verizon has employed modern technologies like the Voice Over LTE (VoLTE) into their networks. As a result, the legacy CDMA network towers which have been freed up can be used to handle devices within the IoT. Retaining the CDMA network aspires to effectively handle small-bursts of traffic like that designed for IoT devices. Moreover the coverage and level of service provided by these towers make it cost effective. Microchip has released a Verizon certified Machine-to-Machine development platform (M2M) for CDMA [1]. M2M communication has a vital role in the emerging IoT paradigm. The platform is designed for the development of customized embedded firmware application on 32 bit PIC microcontrollers with * S. B. Sumith Babu [email protected]; [email protected] R. Kumar [email protected] 1
Department of Electronics and Communication Engineering, SRM University, Chennai, India
13
Vol.:(0123456789)
S. B. Sumith Babu, R. Kumar
local area as well as remote cellular connectivity. By 2021 CISCO reckons about fifty billion devices to be connected with the IoT technology [2, 3]. Qualcomm has recently unveiled that the LTE-IoT would connect a massive IoT at a faster pace than that which is expected [4]. CDMA has beyond doubt been a good candidate in serving a large number of users. Innumerable researches have been attempted in this field of study. Recently, a chaotic-collaborative-CDMA (CCCDMA) scheme has been proposed [5] utilizing a 1D-Bernoulli map to generate a large number of orthogonal chaotic sequences which can be used to spread a very large number of users’ data. The synchronization of multiple groups within th
Data Loading...
