IP Library › Granted Patent US 12,745,289
Granted Patent B2
US 12,745,289 · App. 18/778,689 · Granted Sep 22, 2026

Power control for random access

Inventors: Esmael Hejazi Dinan (McLean, VA); Hyoungsuk Jeon (Centreville, VA)
Assignee: Comcast Cable Communications, LLC
H04W74/0833H04W52/50H04W74/0836H04W52/146H04W52/228H04W74/006H04W74/0838
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Quick Facts
Patent No.
US 12,745,289
App. No.
18/778,689
Granted
Sep 22, 2026
Kind
B2
Abstract

Systems, apparatuses, and methods are described for wireless communications. Random access procedures may include various steps, such as 4-steps or 2-steps. One or more indicators such as, for example, transmission power requirements, may be used to indicate which random access procedure to utilize.

Claims (57)

1 . A method comprising:

transmitting, by a wireless device and using a first transmission power, a first message comprising a first preamble and comprising a transport block;

based on a determination that a calculated transmission power associated with transmission of a second message does not satisfy a transmission power threshold, using a second transmission power to transmit the second message, wherein the second message comprises a second preamble, and wherein the second transmission power was adjusted from the calculated transmission power to satisfy the transmission power threshold; and

based on receiving a random access response to the second message, retransmitting the transport block.

2 . The method of claim 1 , further comprising determining the first transmission power based on a path loss between the wireless device and a base station.

3 . The method of claim 1 , wherein the second transmission power is greater than the first transmission power.

4 . The method of claim 1 , wherein the transmission power threshold corresponds to a maximum transmission power of the wireless device.

5 . The method of claim 1 , wherein the transmission power threshold corresponds to a configured maximum transmission power.

6 . The method of claim 1 , wherein the second transmission power was adjusted based on a ramp up power value.

7 . The method of claim 1 , wherein the second transmission power comprises a total transmission power.

8 . The method of claim 1 , further comprising receiving, from a base station, at least one configuration parameter indicating the transmission power threshold.

9 . The method of claim 1 , wherein the calculated transmission power is adjusted from the first transmission power and exceeds the transmission power threshold.

10 . The method of claim 1 , wherein the first preamble is associated with a two-step random access procedure and the second preamble is associated with a four-step random access procedure.

11 . The method of claim 1 , wherein the using the second transmission power to transmit the second message is further based on a determination that a response to the first message has not been received within a duration threshold.

12 . A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

transmit, using a first transmission power, a first message comprising a first preamble and comprising a transport block;

based on a determination that a calculated transmission power associated with transmission of a second message does not satisfy a transmission power threshold, use a second transmission power to transmit the second message, wherein the second message comprises a second preamble, and wherein the second transmission power was adjusted from the calculated transmission power to satisfy the transmission power threshold; and

based on receiving a random access response to the second message, retransmit the transport block.

13 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the first transmission power based on a path loss between the wireless device and a base station.

14 . The wireless device of claim 12 , wherein the second transmission power is greater than the first transmission power.

15 . The wireless device of claim 12 , wherein the transmission power threshold corresponds to a maximum transmission power of the wireless device.

16 . The wireless device of claim 12 , wherein the transmission power threshold corresponds to a configured maximum transmission power.

17 . The wireless device of claim 12 , wherein the second transmission power was adjusted based on a ramp up power value.

18 . The wireless device of claim 12 , wherein the second transmission power comprises a total transmission power.

19 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive, from a base station, at least one configuration parameter indicating the transmission power threshold.

20 . The wireless device of claim 12 , wherein the calculated transmission power is adjusted from the first transmission power and exceeds the transmission power threshold.

21 . The wireless device of claim 12 , wherein the first preamble is associated with a two-step random access procedure and the second preamble is associated with a four-step random access procedure.

22 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, cause the wireless device to use the second transmission power to transmit the second message further based on a determination that a response to the first message has not been received within a duration threshold.

23 . A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:

transmit, using a first transmission power, a first message comprising a first preamble and comprising a transport block;

based on a determination that a calculated transmission power associated with transmission of a second message does not satisfy a transmission power threshold, use a second transmission power to transmit the second message, wherein the second message comprises a second preamble, and wherein the second transmission power was adjusted from the calculated transmission power to satisfy the transmission power threshold; and

based on receiving a random access response to the second message, retransmit the transport block.

24 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to determine the first transmission power based on a path loss between the wireless device and a base station.

25 . The non-transitory computer-readable medium of claim 23 , wherein the second transmission power is greater than the first transmission power.

26 . The non-transitory computer-readable medium of claim 23 , wherein the transmission power threshold corresponds to a maximum transmission power of the wireless device.

27 . The non-transitory computer-readable medium of claim 23 , wherein the transmission power threshold corresponds to a configured maximum transmission power.

28 . The non-transitory computer-readable medium of claim 23 , wherein the second transmission power was adjusted based on a ramp up power value.

29 . The non-transitory computer-readable medium of claim 23 , wherein the second transmission power comprises a total transmission power.

30 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to receive, from a base station, at least one configuration parameter indicating the transmission power threshold.

31 . The non-transitory computer-readable medium of claim 23 , wherein the calculated transmission power is adjusted from the first transmission power and exceeds the transmission power threshold.

32 . The non-transitory computer-readable medium of claim 23 , wherein the first preamble is associated with a two-step random access procedure and the second preamble is associated with a four-step random access procedure.

33 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, configure the wireless device to use the second transmission power to transmit the second message further based on a determination that a response to the first message has not been received within a duration threshold.

34 . A system comprising:

a base station; and

a wireless device, wherein the wireless device is configured to:

transmit, using a first transmission power, a first message comprising a first preamble and comprising a transport block;

based on a determination that a calculated transmission power associated with transmission of a second message does not satisfy a transmission power threshold, use a second transmission power to transmit the second message, wherein the second message comprises a second preamble, and wherein the second transmission power was adjusted from the calculated transmission power to satisfy the transmission power threshold; and

based on receiving a random access response to the second message, retransmit the transport block, and

wherein the base station is configured to transmit the random access response.

35 . The system of claim 34 , wherein the wireless device is further configured to determine the first transmission power based on a path loss between the wireless device and the base station.

36 . The system of claim 34 , wherein the second transmission power is greater than the first transmission power.

37 . The system of claim 34 , wherein the second transmission power was adjusted based on a ramp up power value.

38 . The system of claim 34 , wherein the second transmission power comprises a total transmission power.

39 . The system of claim 34 , wherein the base station is further configured to transmit at least one configuration parameter indicating the transmission power threshold.

40 . The system of claim 34 , wherein the first preamble is associated with a two-step random access procedure and the second preamble is associated with a four-step random access procedure.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2025
From: DINAN, ESMAEL HEJAZI; JEON, HYOUNGSUK
To: COMCAST CABLE COMMUNICATIONS, LLC
Reel/Frame 071156/0480 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2025
From: DINAN, ESMAEL HEJAZI; JEON, HYOUNGSUK
To: OFINNO TECHNOLOGIES, LLC
Reel/Frame 071156/0333 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2025
From: OFINNO TECHNOLOGIES, LLC
To: COMCAST CABLE COMMUNICATIONS, LLC
Reel/Frame 071156/0428 →
Continuity (4)
Continuation 18176798 · Mar 1, 2023
Continuation 15933304 · Mar 22, 2018
Provisional Application 62475537 · Mar 23, 2017
Related Publication 20250056621A1 · Feb 13, 2025
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R1-1710774 3GPP TSG RAN WG1 Meeting NR Adhoc, Qingdao, P.R. China, Jun. 27-30, 2017, Source: CMCC, Title: Discussion on RACH configuration. [cited by applicant]
R1-1710824 3GPP TSG RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-30, 2017, Source: MediaTek Inc., Title: On 4-step RACH procedure. [cited by applicant]
R1-1710860 3GPP TSG RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-30, 2017, Source: Sony, Title: Considerations on 4-step RA Procedure. [cited by applicant]
R1-1710871 3GPP TSG-RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-20, 2017, Source: InterDigital Inc., Title: Multiple Msg1 transmissions for one monitored RAR window. [cited by applicant]
R1-1710892 3GPP TSG RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-30, 2017, Source: Nokia, Alcatel-Lucent Shanghai Bell, Title: NR 4-step RACH procedure. [cited by applicant]
R1-1711068 3GPP TSG RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-30, 2017, Source: NTT Docomo, Inc., Title: Discussion on 4-step RA procedure for NR. [cited by applicant]
R1-1711148 3GPP TSG-RAN WG1 Meeting #89, Hangzhou, China, May 15-19, 2017, Source: Qualcomm Incorporated, Title: 4-step RACH procedure consideration. [cited by applicant]
R1-1711279 3GPP TSG RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-30, 2017, Source: Motorola Mobility, Lenovo, Title: RACH configuration and procedure. [cited by applicant]
R1-1711383 3GPP TSG RAN WG1 NR Ad-Hoc #2, Qingdao, P.R. China, Jun. 27-30, 2017, Source: Ericsson, Title: 4-step random access procedure. [cited by applicant]
Dec. 16, 2019—European Extended Search Report—EP 19190988.6. [cited by applicant]
R1-1806545 3GPP TSG RAN WG1 Meeting #93, Busan, Korea, May 21-25, 2018, Source: Intel Corporation, Title: Potential enhancements to NR initial access and mobility to support unlicensed operation. [cited by applicant]
R2-1713954 3GPP TSG RAN WG2 Meeting #100, Reno, USA, Nov. 27-Dec. 1, 2017, Source: ZTE Corporation, Sanechips, Title: Discussion on the beam failure recovery impact on RAN2. [cited by applicant]
R1-164131 3GPP TSG RAN WG1 Meeting #85, Nanjing, China, May 23-27, 2017, Source: Intel Corporation, Title: PRACH Transmission for eLAA. [cited by applicant]
R1-162358 3GPP TSG RAN WG1 Meeting #84bis, Busan, Korea, Apr. 11-15, 2016, Source: Intel Corporation, Title: PRACH Design for eLAA. [cited by applicant]
Apr. 22, 2021—European Office Action—EP 18718540.0. [cited by applicant]
“Text Proposal to TR 38.804 on Random Access Procedure,” Spokane, WA, 3GPP TSG-RAN WG2 NR Ad Hoc, R2-1700416, Jan. 17-19, 2017, Source: Ericsson. [cited by applicant]
“Discussions on 2 Steps RACH Procedure,” Spokane, WA, 3GPP TSG RAN WG2 Meeting AH_NR Meeting, R2-1700471, Jan. 17-19, 2017, Source: Sony. [cited by applicant]
“Flexible RACH,” Spokane, WA, 3GPP TSG-RAN WG2 Meeting NR AH, R2-1700522, Jan. 17-19, 2017, Source: MediaTek Inc. [cited by applicant]
“2 step Random Access Procedure in NR,” Spokane, WA, 3GPP TSG-RAN WG2 Meeting NR ad-hoc, R2-1700564, Jan. 17-19, 2017, Source: Qualcomm Incorporated. [cited by applicant]
“Considerations on L2 handling for Handover,” Athens, Greece, 3GPP TSG-RAN WG2 NR Adhoc, R2-1700816, Feb. 13-17, 2017, Source: Nokia, Alcatel-Lucent Shanghai Bell. [cited by applicant]
“Random Access in NR—Flexible UE Bandwidth Aspects,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700821, Feb. 13-17, 2017, Source: Samsung. [cited by applicant]
“Random Access Enhancements,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700850, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“Text proposal on RACH (E-mail discussion NR-AH#12),” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700851, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“Pcell change procedure for CA in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700855, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“Further details of handover execution in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700863, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“Conditional Handover,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700864, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“RLC ARQ vs. PDCP data recovery during mobility,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700865, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“SeNB to MeNB reconfiguration for NR dual-connectivity,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700866, Feb. 13-17, 2017, Source: Ericsson. [cited by applicant]
“RRC involved HO for cell-level mobility,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700883, Feb. 13-17, 2017, Source: MediaTek Inc. [cited by applicant]
“Mobility Enhancement for ‘0ms’ interruption,” Spokane, WA, 3GPP TSG-RAN WG2 NR, R2-1700897, Jan. 17-19, 2017, Source: MediaTek Inc., ASUS TeK. [cited by applicant]
“Discussion on Handover Procedure Optimization,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700956, Feb. 13-17, 2017, Source: OPPO. [cited by applicant]
“Consideration on Random Access in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700962, Feb. 13-17, 2017, Source: OPPO. [cited by applicant]
“Design Principles for Random Access Procedure in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700969, Feb. 13-17, 2017, Source: CATT. [cited by applicant]
“Random Access Procedure in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700970, Feb. 13-17, 2017, Source: CATT. [cited by applicant]
“L2 Behaviors in NR Handover or Reconfiguration,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700984, Feb. 13-17, 2017, Source: CATT. [cited by applicant]
“Further Consideration on Inter-cell HO Mechanism,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700985, Feb. 13-17, 2017, Source: CATT. [cited by applicant]
“NR Mobility Enhancement on Single Connectivity,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700986, Feb. 13-17, 2017, Source: CATT. [cited by applicant]
“NR Mobility Enhancement on Dual Connectivity,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1700987, Feb. 13-17, 2017, Source: CATT. [cited by applicant]
“NW Activation-De-activation of autonomous handover in single connectivity,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701137, Feb. 13-17, 2017, Source: Sharp. [cited by applicant]
“Mobility in NR Connected-Active,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701148, Feb. 13-17, 2017, Source: Samsung. [cited by applicant]
“Inter-cell and Inter-node UE RRC Driven Mobility in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701194, Feb. 13-17, 2017, Source: InterDigital Communications. [cited by applicant]
“Introduction of UE autonomous mobility,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701360, Feb. 13-17, 2017, Source: Samsung. [cited by applicant]
“Discussion on intra-frequency operation for dual-connectivity in HF NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701361, Feb. 13-17, 2017, Source: Samsung. [cited by applicant]
“Consideration on dual connected handover,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701384, Feb. 13-17, 2017, Source: ZTE, ZTE Microelectronics. [cited by applicant]
“Solutions for single connected handover,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701385, Feb. 13-17, 2017, Source: ZTE, ZTE Microelectronics. [cited by applicant]
“Remaining RAN2 aspects on random access procedure for NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701520, Feb. 13-17, 2017, Source: NTT Docomo, Inc. [cited by applicant]
“RA enhancement for New RAT,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701539, Feb. 13-17, 2017, Source: LG Electronics Inc. [cited by applicant]
“NW controlled autonomous handover in single connectivity,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701711, Feb. 13-17, 2017, Source: Intel Corporation. [cited by applicant]
“Mobility type support for multiple beams in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701712, Feb. 13-17, 2017, Source: Intel Corporation. [cited by applicant]
“Further considerations of random access in NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701721, Feb. 13-17, 2017, Source: Intel Corporation. [cited by applicant]
“Considerations on NR RA procedure,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701771, Feb. 13-17, 2017, Source: Qualcomm Incorporated. [cited by applicant]
“Handover in single connectivity scenario,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701798, Feb. 13-17, 2017, Source: Huawei, HiSilicon. [cited by applicant]
“0ms interruption handover for NR,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701799, Feb. 13-17, 2017, Source: Huawei, HiSilicon. [cited by applicant]
“Enhancements for robust handover,” Athens, Greece, 3GPP TSG-RAN Meeting #97, R2-1701800, Feb. 13-17, 2017, Source: Huawei, HiSilicon. [cited by applicant]
“NR mobility in Connected,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701833, Feb. 13-17, 2017, Source: Sharp. [cited by applicant]
“Mobility Enhancements in NR phase 1 (Release 15),” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701905, Feb. 13-17, 2017, Source: Samsung. [cited by applicant]
“How to define zero mobility interruption time,” Athens, Greece, 3GPP TSG-RAN WG2 Meeting #97, R2-1701906, Feb. 13-17, 2017, Source: Samsung. [cited by applicant]
“Condition based handover procedure in NR,” Athens, Greece, 3GPP TSG-RAN2 Meeting #97, R2-1701966, Feb. 13-17, 2017, Source: LG Electronics Inc. [cited by applicant]
“2-Step Random Access Procedure in NR,” Reno, Nevada, 3GPP TSG-Ran WG2 Meeting #96, R2-168520, Nov. 14-18, 2016, Source: Intel Corporation. [cited by applicant]
Jun. 21, 2018—Partial International Search Report and Written Opinion—PCT/US2018/023886. [cited by applicant]
“2-step Random Access Procedure,” Spokane, WA, 3GPP TSG RAN WG1 NR, AH_NR Meeting R1-1700105, Jan. 16-20, 2017, Source: ZTE, ZTE Microelectronics (Version 2). [cited by applicant]
Aug. 13, 2018—International Search Report and Written Opinion—PCT/2018/023886. [cited by applicant]
U.S. Appl. No. 62/427,736, filed Nov. 29, 2016. [cited by applicant]
3GPP TS 38.213 V15.2.0 (Jun. 2018), Technical Specification, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release 15). [cited by applicant]
3GPP TS 38.321 V15.2.0 (Jun. 2018), Technical Specification, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 15). [cited by applicant]