US 12,302,407 B2
Technique for configuring a random access procedure
Min Wang, Luleå (SE); and Jinhua Liu, Beijing (CN)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/290,244
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 30, 2019, PCT No. PCT/EP2019/079718
§ 371(c)(1), (2) Date Apr. 29, 2021,
PCT Pub. No. WO2020/089328, PCT Pub. Date May 7, 2020.
Claims priority of application No. PCT/CN2018/112577 (WO), filed on Oct. 30, 2018.
Prior Publication US 2021/0378027 A1, Dec. 2, 2021
Int. Cl. H04W 74/0833 (2024.01); H04W 68/00 (2009.01)
CPC H04W 74/0841 (2013.01) [H04W 68/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for configuring a random access procedure to be performed by a user equipment (UE) when handing over from a serving cell to a target cell in a cellular network, the method being performed by a base station associated with the serving cell and comprising: determining whether a load and/or a channel occupancy in the target cell is below a predetermined threshold; as a result of determining that the load and/or the channel occupancy in the target cell is below the predetermined threshold, selecting a two-step random access procedure from among a plurality of types of random access procedures; and triggering sending, to the UE, a message related to the handover from the serving cell to the target cell, the message including an indication of a preferred type of random access procedure to be performed by the UE with the target cell, wherein the preferred type of random access procedure corresponds to the two-step random access procedure, wherein the message includes one or more parameters defining characteristics of the two-step random access procedure to be performed by the UE with the target cell, and the one or more parameters include at least one of: a parameter indicating whether a demodulation reference signal (DMRS) is to be included in a first message of the two-step random access procedure sent from the UE to the target cell, or a parameter indicating which among a plurality of DMRSs configured by the cellular network is to be selected as the DMRS to be included in the first message.