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1. (WO2018078639) PHYSICAL RANDOM-ACCESS CHANNEL FOR NARROW BAND INTERNET OF THINGS TIME DIVISION DUPLEX MODE

Pub. No.:    WO/2018/078639    International Application No.:    PCT/IN2017/050319
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Fri Aug 04 01:59:59 CEST 2017
IPC: H04B 7/212
H04L 5/14
H04J 4/00
Applicants: WISIG NETWORKS PRIVATE LIMITED
Inventors: KUCHI, Kiran Kumar
GANJI, Venkata Siva Santosh
Title: PHYSICAL RANDOM-ACCESS CHANNEL FOR NARROW BAND INTERNET OF THINGS TIME DIVISION DUPLEX MODE
Abstract:
Embodiments of the present disclosure are related, in general to communication, but exclusively relate to communication in a time division duplex (TDD) network. A user equipment (UE) transmits a Physical Random-Access Channel (PRACH) to an enhanced node base (eNodeB) even in low coverage scenario. The PRACH had to be transmitted in any available uplink sub-frame. The Narrow band - Internet of things (NB-IoT) N-PRACH channel for TDD (time division duplex) communication system with 5KHz sub carrier spacing is used for transmission in in-band, guard band and standalone band deployments. In available duration of 1 msec for uplink, multiple NPRACH symbols is be transmitted.