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1. (WO2017031676) RANDOM ACCESS PROCEDURE FOR MACHINE TYPE COMMUNICATION

Pub. No.:    WO/2017/031676    International Application No.:    PCT/CN2015/087974
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Wed Aug 26 01:59:59 CEST 2015
IPC: H04W 74/08
Applicants: LENOVO INNOVATIONS LIMITED (HONG KONG)
Inventors: LAI, Xuefeng
LI, Tong
SHEN, Zukang
Title: RANDOM ACCESS PROCEDURE FOR MACHINE TYPE COMMUNICATION
Abstract:
Apparatuses, methods, and systems are disclosed for alleviating congestion during random access of enhanced machine-type communications user equipment. One apparatus includes a radio transceiver that communicates over a mobile telecommunications network and a processor configured to: transmit a physical random access channel (PRACH) preamble on a first time-frequency resource, monitor a second time-frequency resource for a first downlink (DL) grant scheduling a random access response (RAR) corresponding to the transmitted PRACH preamble on a third time-frequency resource, receive the RAR on the third time-frequency resource, transmit a message on a fourth time-frequency resource, wherein the fourth time-frequency resource is determined based on the RAR; determine a fifth time-frequency resource based on a time-frequency resource index, wherein the RAR includes the time-frequency resource index, and monitor the fifth time-frequency resource for a second DL grant scheduling a contention resolution message.