US Patent No. 10,485,030

METHOD AND APPARATUS FOR RECEIVING UPLINK SIGNAL IN TRAIN COMMUNICATION NETWORK


Patent No. 10,485,030
Issue Date November 19, 2019
Title Method And Apparatus For Receiving Uplink Signal In Train Communication Network
Inventorship Bing Hui, Daejeon (KR)
Yeong Jin Kim, Daejeon (KR)
Il Gyu Kim, Chungcheongbuk-do (KR)
Jun Hwan Lee, Seoul (KR)
Hee Sang Chung, Daejeon (KR)
Assignee ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)

Claim of US Patent No. 10,485,030

1. A method for receiving an uplink signal by a terrestrial base station, comprising:receiving a preamble corresponding to an orthogonal pseudo-noise (PN) sequence of a plurality of orthogonal PN sequences from an onboard wireless device in a train, wherein the onboard wireless device is connected with the terrestrial base station through a wireless backhaul link;
recognizing an identification (ID) of the onboard wireless device from the preamble, storing the recognized ID of the onboard wireless device, and allocating a temporary network ID and an uplink grant (UL grant) to the onboard wireless device;
receiving the uplink signal transmitted based on the temporary network ID and the UL grant;
obtaining an ID of the onboard wireless device from the uplink signal; and
determining whether a random access of the onboard wireless device is for a network initial access, for a network re-access, or for a handover, by comparing the obtained ID with the recognized ID of the onboard wireless device stored in advance.