IP Library › Granted Patent US 12,477,590

Granted Patent B2

US 12,477,590 · App. 18/180,528 · Granted Nov 18, 2025

User equipment, base station, and information transmission method

Inventor: Hao Lin (Neuilly sur Seine, FR)

Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

H04W74/0841 H04W74/0833 H04W74/0836 H04W74/0838

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Quick Facts

Patent No.: US 12,477,590
App. No.: 18/180,528
Granted: Nov 18, 2025
Kind: B2

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Abstract

A user equipment (UE), a base station, and an information transmission method are provided. The information transmission method includes determining, by a user equipment (UE), a first time duration and/or a second time duration; and determining, by the UE, a first position using the first time duration and/or a second position using the second time duration for a random access procedure, wherein the first position comprises a position of a first window and the second position comprises a position of a first transmission. This can solve issues in the prior art, adapt a suitable offset value and/or duration for the subsequent transmission, provide a good communication performance, and/or provide high reliability.

Claims (164)

1 . An information transmission method, comprising:

determining, by a user equipment (UE), at least one of a first time duration and a second time duration; and

determining, by the UE, at least one of a first position using the first time duration and a second position using the second time duration for a random access procedure, wherein the first position comprises a position of a first window and the second position comprises a position of a first transmission;

wherein the random access procedure comprises at least one of the followings: a type 1 random access procedure, or a type 2 random access procedure;

wherein the type 1 random access procedure comprises a 4-step resource allocation (RA) type;

wherein the type 2 random access procedure comprises a 2-step RA type;

wherein the 4-step RA type comprises the UE transmitting a message 1 (Msg1) on a physical random access channel (PRACH) transmission, wherein the Msg1 comprises a preamble;

wherein the 2-step RA type comprises the UE transmitting a message A (MsgA) on the PRACH transmission and a first physical uplink shared channel (PUSCH) transmission wherein the Msg A comprises a preamble and a payload;

wherein the preamble is transmitted in the PRACH transmission;

wherein the payload is transmitted in the first PUSCH transmission;

wherein the first PUSCH is associated with the PRACH transmission.

2 . The method of claim 1 , wherein the random access procedure comprises a contention-based random access procedure (CBRA) and/or a contention-free random access procedure (CFRA);

wherein the CFRA comprises a preamble assigned by a base station and/or a resource of the first PUSCH assigned by the base station.

3 . The method of claim 1 , wherein the first window comprises at least one of a random access response (RAR) window and a contention resolution window;

wherein the RAR window comprises a window for receiving at least one of a RAR to the Msg 1 and a RAR to the MsgA, by the UE, from the base station;

wherein the RAR is transmitted in a first physical downlink shared channel (PDSCH) or in a first physical downlink control channel (PDCCH), wherein the first PDSCH is scheduled by a first downlink control information (DCI) format with cyclical redundancy check (CRC) scrambled by random access-radio network temporary identity (RA-RNTI) or MsgA-radio network temporary identity (MsgA-RNTI);

wherein the first DCI format comprises DCI format 1_0;

wherein the contention resolution window comprises a timer;

wherein the UE may receive a second PDSCH within the contention resolution window, wherein the second PDSCH may be in response to at least one of the first PUSCH and a second PUSCH;

wherein the second PUSCH may be scheduled by at least one of a RAR uplink grant and a second DCI format with CRC scrambled by temporary cell-radio network temporary identity (RNTI) (TC-RNTI);

wherein the second PUSCH comprises a message 3 (Msg3);

wherein the RAR uplink grant may be transmitted in the first PDSCH;

wherein the second DCI format comprises DCI format 0_0;

wherein at least one of the first DCI format and the second DCI format may be detected in a second PDCCH according to a type 1 PDCCH common search space (CSS) set;

wherein the second PDSCH comprises a UE contention resolution identity;

wherein the first PDCCH comprises a third DCI format with CRC scrambled by cell-radio network temporary identity (C-RNTI) or modulation coding scheme (MCS)-cell-RNTI (MCS-C-RNTI);

wherein the first PDCCH is detected in a configured search space set;

wherein the configured search space set is configured by recoverySearchSpaceId.

4 . The method of claim 1 , wherein determining at least one of the first time duration and the second time duration is further relevant to at least one of the CFRA, the CBRA, the 2-step RA type, the 4-step RA type and an active BWP;

wherein the UE determines at least one of the first time duration and the second time according to whether the random process procedure is the CFRA or the CBRA;

wherein the UE determines at least one of the first time duration and the second time according to whether the random process procedure is the 2-step RA type or the 4-step RA type;

wherein the UE determines at least one of the first time duration and the second time according to a relationship between an active bandwidth part (BWP) and an initial uplink (UL) BWP;

wherein the active BWP comprises an active UL BWP in which the UE transmits the PRACH transmission for the random access procedure;

wherein when the random access procedure is at least one of the followings: the CFRA, the CBRA, the 2-step RA type, or the 4-step RA type, the UE may determine at least one of the first time duration and the second time duration from the system information by the first parameter;

wherein when the active BWP satisfies at least one of the following conditions:

the active BWP includes all the resource blocks (RBs) of the initial UL BWP; or

the active BWP has the same subcarrier spacing as the initial UL BWP; or

the active BWP has the same cyclic prefix (CP) length as the initial UL BWP;

the UE may determine at least one of the first time duration and the second time duration from the system information by the first parameter.

5 . An information transmission method, comprising:

configuring, by a base station, at least one of a first time duration and a second time duration to a user equipment (UE); and

controlling, by the base station, the UE to determine at least one of a first position using the first time duration and a second position using the second time duration for a random access procedure, wherein the first position comprises a position of a first window and the second position comprises a position of a first transmission;

wherein the random access procedure comprises at least one of the followings: a type 1 random access procedure, or a type 2 random access procedure;

wherein the type 1 random access procedure comprises a 4-step resource allocation (RA) type;

wherein the type 2 random access procedure comprises a 2-step RA type;

wherein the 4-step RA type comprises the UE transmitting a message 1 (Msg1) on a physical random access channel (PRACH) transmission, wherein the Msg1 comprises a preamble;

wherein the 2-step RA type comprises the UE transmitting a message A (MsgA) on the PRACH transmission and a first physical uplink shared channel (PUSCH) transmission, wherein the Msg A comprises a preamble and a payload;

wherein the preamble is transmitted in the PRACH transmission;

wherein the payload is transmitted in the first PUSCH transmission;

wherein the first PUSCH is associated with the PRACH transmission.

6 . The method of claim 5 , wherein the random access procedure comprises a contention-based random access procedure (CBRA) and/or a contention-free random access procedure (CFRA);

wherein the CFRA comprises a preamble assigned by a base station and/or a resource of the first PUSCH assigned by the base station.

7 . The method of claim 5 , wherein the first window comprises at least one of a random access response (RAR) window and a contention resolution window;

wherein the RAR window comprises a window for receiving at least one of a RAR to the Msg 1 and a RAR to the MsgA, by the UE, from the base station;

wherein the first DCI format comprises DCI format 1_0;

wherein the contention resolution window comprises a timer;

wherein the UE may receive a second PDSCH within the contention resolution window, wherein the second PDSCH may be in response to at least one of the first PUSCH and a second PUSCH;

wherein the second PUSCH may be scheduled by at least one of a RAR uplink grant and a second DCI format with CRC scrambled by temporary cell-radio network temporary identity (RNTI) (TC-RNTI);

wherein the second PUSCH comprises a message 3 (Msg3);

wherein the RAR uplink grant may be transmitted in the first PDSCH;

wherein the second DCI format comprises DCI format 0_0;

wherein at least one of the first DCI format and the second DCI format may be detected in a second PDCCH according to a type 1 PDCCH common search space (CSS) set;

wherein the second PDSCH comprises a UE contention resolution identity;

wherein the first PDCCH comprises a third DCI format with CRC scrambled by cell-radio network temporary identity (C-RNTI) or modulation coding scheme (MCS)-cell-RNTI (MCS-C-RNTI);

wherein the first PDCCH is detected in a configured search space set;

wherein the configured search space set is configured by recoverySearchSpaceId.

8 . The method of claim 5 , wherein determining at least one of the first time duration and the second time duration is further relevant to at least one of the CFRA, the CBRA, the 2-step RA type, the 4-step RA type and an active BWP;