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Hybrid automatic repeat request feedback in radio systems

專(zhuān)利號(hào)
US11483802B2
公開(kāi)日期
2022-10-25
申請(qǐng)人
Ofinno, LLC（US VA Reston）
發(fā)明人
Kai Xu; Esmael Hejazi Dinan; Hua Zhou; Alireza Babaei; Bing Hui; Kyungmin Park; Hyukjin Chae
IPC分類(lèi)
H04W72/04; H04L1/18
技術(shù)領(lǐng)域
rx,repetition,ue2,wireless,tx,may,pssch,ue1,ue,sidelink
地域： VA VA Reston

摘要

A wireless device receives one or more messages. The one or more messages indicate: a plurality of repetition values of a physical sidelink shared channel (PSSCH); and a repetition threshold for the PSSCH. A sidelink control information is received. The sidelink control information schedules a transport block. The sidelink control information indicates a first repetition value of the plurality of repetition values. The transport block is received via the PSSCH. A determination is made, based on the first repetition value and the repetition threshold, to transmit an acknowledgment for the transport block. The acknowledgment for the transport block is transmitted.

說(shuō)明書(shū)

The UE may perform a preamble retransmission if no response is received following a preamble transmission. The UE may increase an uplink transmit power for the preamble retransmission. The UE may select an initial preamble transmit power based on a pathloss measurement and/or a target received preamble power configured by the network. The UE may determine to retransmit a preamble and may ramp up the uplink transmit power. The UE may receive one or more RACH parameters (e.g., PREAMBLE_POWER_RAMPING_STEP) indicating a ramping step for the preamble retransmission. The ramping step may be an amount of incremental increase in uplink transmit power for a retransmission. The UE may ramp up the uplink transmit power if the UE determines a reference signal (e.g., SSB and/or CSI-RS) that is the same as a previous preamble transmission. The UE may count a number of preamble transmissions and/or retransmissions (e.g., PREAMBLE TRANSMISSION COUNTER). The UE may determine that a random access procedure completed unsuccessfully, for example, if the number of preamble transmissions exceeds a threshold configured by the one or more RACH parameters (e.g., preambleTransMax).

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