US 10,485,030 B2
Method and apparatus for receiving uplink signal in train communication network
Bing Hui, Daejeon (KR); Yeong Jin Kim, Daejeon (KR); Il Gyu Kim, Chungcheongbuk-do (KR); Jun Hwan Lee, Seoul (KR); and Hee Sang Chung, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Nov. 3, 2017, as Appl. No. 15/802,682.
Claims priority of application No. 10-2016-0146744 (KR), filed on Nov. 4, 2016; and application No. 10-2017-0145889 (KR), filed on Nov. 3, 2017.
Prior Publication US 2018/0132283 A1, May 10, 2018
Int. Cl. H04W 36/00 (2009.01); H04W 72/04 (2009.01); H04W 74/00 (2009.01); H04W 74/08 (2009.01); H04W 48/16 (2009.01); H04W 84/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 36/0005 (2013.01); H04W 36/0077 (2013.01); H04W 72/0453 (2013.01); H04W 48/16 (2013.01); H04W 74/004 (2013.01); H04W 84/005 (2013.01)] 18 Claims
OG exemplary drawing
 
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.