US 12,089,218 B2
Uplink scrambling during random access
Stefan Parkvall, Stockholm (SE); Erik Dahlman, Bromma (SE); and Tobias Tynderfeldt, Solna (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Apr. 7, 2022, as Appl. No. 17/715,188.
Application 17/715,188 is a continuation of application No. 15/945,835, filed on Apr. 5, 2018, granted, now 11,330,567.
Application 15/945,835 is a continuation of application No. 14/244,580, filed on Apr. 3, 2014, granted, now 9,949,239.
Application 14/244,580 is a continuation of application No. 13/430,844, filed on Mar. 27, 2012, granted, now 8,717,996.
Application 13/430,844 is a continuation of application No. 11/835,782, filed on Aug. 8, 2007, granted, now 8,169,992.
Prior Publication US 2022/0232559 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/04 (2023.01); H04W 72/02 (2009.01); H04W 72/21 (2023.01); H04W 74/00 (2009.01); H04W 74/08 (2024.01); H04W 74/0833 (2024.01)
CPC H04W 72/21 (2023.01) [H04W 72/02 (2013.01); H04W 74/004 (2013.01); H04W 74/0833 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method implemented in a user terminal for performing a random access procedure, the method comprising:
transmitting a first random access request message including a random access preamble to a radio base station using a random access channel, RACH, radio resource;
receiving a second random access response message from the radio base station, the second random access response message indicating a timing change, an identified radio resource of an uplink shared channel, UL-SCH, and a temporary user terminal identity;
adjusting a timing at the user terminal for transmitting signals to the radio base station based on the timing change indicated in the second random access response message;
based on the adjusted timing, transmitting a third message to the radio base station over the identified radio resource of the uplink shared channel, wherein the third message includes a user terminal identity that was assigned to the user terminal before the random access procedure, and wherein the third message is scrambled using a cell-associated scrambling sequence that is not terminal-specific; and
receiving a fourth contention resolution message from the radio base station to complete the random access procedure.