IP Library › Granted Patent US 12,341,592
Granted Patent B2
US 12,341,592 · App. 18/592,508 · Granted Jun 24, 2025

Method and device for random access for beam failure recovery

Inventors: Rui Fan (Beijing, CN); Icaro L. J. Da Silva (Solna, SE); Helka-Liina Määttanen (Helsinki, FI)
Assignee: Telefonaktiebolaget LM Ericsson
H04B7/0695H04B7/0617H04W74/006H04W74/02H04W74/0833
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,341,592
App. No.
18/592,508
Granted
Jun 24, 2025
Kind
B2
Abstract

A method for random access for beam failure recovery. In the method, a random access configuration for the beam failure recovery is received. In the event of a beam failure, a random access procedure is performed according to the random access configuration.

Claims (56)

1. A method in a user equipment in a network comprising:

receiving a message comprising a specific random access configuration for beam failure recovery from the network,

wherein the specific random access configuration for the beam failure recovery differs from a random access configuration for an ordinary random access procedure,

wherein the specific random access configuration for the beam failure recovery comprises at least one of: a maximum number of preamble transmission attempts, a size of random access response (RAR) window for the beam failure recovery, a contention free random access resource, or both the size of the RAR window and the contention free random access resource,

wherein the size of the RAR window for the beam failure recovery differs from a size of a RAR window for the ordinary random access procedure, and usage of contention free random access resources differ between a contention free random access for the beam failure recovery and a contention free random access for the ordinary random access procedure;

determining a beam failure event;

performing a random access procedure for the beam failure recovery using the received specific random access configuration, the random access procedure being performed comprises:

selecting a candidate beam with a Reference Signal Received Power (RSRP) higher than a threshold; and

attempting random access via the selected candidate beam; and

stopping the random access procedure when:

a radio link failure (RLF) timer expires; or

the maximum number of preamble transmission attempts is reached.

2. The method according to claim 1 , wherein the performing the random access procedure for the beam failure recovery using the received specific random access configuration further comprises:

when the random access procedure via the selected candidate beam fails, selecting another candidate beam; and

attempting the random access procedure via the another candidate beam.

3. The method according to claim 2 , wherein the another candidate beam has a highest RSRP.

4. The method according to claim 1 further comprising:

generating an indication that the random access procedure is for the beam failure recovery when the random access procedure is completed with a successful beam failure recovery.

5. A user equipment comprising:

a processor; and

a memory containing instructions which, when executed by the processor, cause the user equipment to:

receive a message comprising a specific random access configuration for beam failure recovery from a network,

wherein the specific random access configuration for the beam failure recovery differs from a random access configuration for an ordinary random access procedure,

wherein the specific random access configuration for the beam failure recovery comprises at least one of: a maximum number of preamble transmission attempts, a size of random access response (RAR) window for the beam failure recovery, a contention free random access resource, or both the size of the RAR window and the contention free random access resource,

wherein the size of the RAR window for the beam failure recovery differs from a size of a RAR window for the ordinary random access procedure, and usage of contention free random access resources differ between a contention free random access for the beam failure recovery and a contention free random access for the ordinary random access procedure;

determine a beam failure event;

perform a random access procedure for the beam failure recovery using the received specific random access configuration, the random access procedure being performed comprises:

select a candidate beam with a Reference Signal Received Power (RSRP) higher than a threshold; and

attempt random access via the selected candidate beam; and

stopping the random access procedure when:

a radio link failure (RLF) timer expires; or

the maximum number of preamble transmission attempts is reached.

6. The user equipment according to claim 5 , wherein to perform the random access procedure for the beam failure recovery using the received specific random access configuration further comprises:

when the random access procedure via the selected candidate beam fails, select another candidate beam; and

attempt the random access procedure via the another candidate beam.

7. The user equipment according to claim 6 , wherein the another candidate beam has a highest RSRP.

8. The user equipment according to claim 5 further comprising:

generate an indication that the random access procedure is for the beam failure recovery when the random access procedure is completed with a successful beam failure recovery.

9. A non-transitory computer readable storage medium having a computer program stored thereon, the computer program which, when executed by a processor of a user equipment, cause the user equipment to perform operations comprising:

receiving a message comprising a specific random access configuration for beam failure recovery from a network,

wherein the specific random access configuration for the beam failure recovery differs from a random access configuration for an ordinary random access procedure,

wherein the specific random access configuration for the beam failure recovery comprises at least one of: a maximum number of preamble transmission attempts, a size of random access response (RAR) window for the beam failure recovery, a contention free random access resource, or both the size of the RAR window and the contention free random access resource,

wherein the size of the RAR window for the beam failure recovery differs from a size of a RAR window for the ordinary random access procedure, and usage of contention free random access resources differ between a contention free random access for the beam failure recovery and a contention free random access for the ordinary random access procedure;

determining a beam failure event;

performing a random access procedure for the beam failure recovery using the received specific random access configuration, the random access procedure being performed comprises:

selecting a candidate beam with a Reference Signal Received Power (RSRP) higher than a threshold; and

attempting random access via the selected candidate beam; and

stopping the random access procedure when:

a radio link failure (RLF) timer expires; or

the maximum number of preamble transmission attempts is reached.

10. The non-transitory computer readable storage medium according to claim 9 , wherein the performing the random access procedure for the beam failure recovery using the received specific random access configuration further comprises:

when the random access procedure via the selected candidate beam fails, selecting another candidate beam; and

attempting the random access procedure via the another candidate beam.

11. The non-transitory computer readable storage medium according to claim 10 , wherein the another candidate beam has a highest RSRP.

12. The non-transitory computer readable storage medium according to claim 9 , wherein the computer program further cause the user equipment to perform operations comprising:

generating an indication that the random access procedure is for the beam failure recovery when the random access procedure is completed with a successful beam failure recovery.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2025
From: MÄÄTTANEN, HELKA-LIINA
To: OY L M ERICSSON AB
Reel/Frame 069809/0387 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2025
From: FAN, RUI; DA SILVA, ICARO L. J.
To: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Reel/Frame 069809/0445 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2025
From: OY L M ERICSSON AB
To: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Reel/Frame 069809/0474 →
Continuity (5)
Continuation 18304339 · Apr 20, 2023
Continuation 17820868 · Aug 18, 2022
Continuation 17085329 · Oct 30, 2020
Continuation 16089351
Related Publication 20240204852A1 · Jun 20, 2024
References Cited (76)
US 10700752B2 · Jung · 2020 [cited by examiner]
US 10826592B2 · Fan et al. · 2020 [cited by applicant]
US 20140233530A1 · Damnjanovic et al. · 2014 [cited by applicant]
US 20150319800A1 · Park et al. · 2015 [cited by applicant]
US 20150351135A1 · Schmidt et al. · 2015 [cited by applicant]
US 20160192401A1 · Park et al. · 2016 [cited by applicant]
US 20170181134A1 · Niu et al. · 2017 [cited by applicant]
US 20170207843A1 · Jung et al. · 2017 [cited by applicant]
US 20180035470A1 · Chen et al. · 2018 [cited by applicant]
US 20180084585A1 · Lee et al. · 2018 [cited by applicant]
US 20180139668A1 · Takahashi et al. · 2018 [cited by applicant]
US 20180375556A1 · Wang et al. · 2018 [cited by applicant]
US 20190053293A1 · Akoum et al. · 2019 [cited by applicant]
US 20190208547A1 · Koskela · 2019 [cited by examiner]
US 20190306887A1 · Rathonyi et al. · 2019 [cited by applicant]
US 20190335522A1 · Zhang · 2019 [cited by examiner]
US 20190342925A1 · Zhang et al. · 2019 [cited by applicant]
US 20200120714A1 · Wang · 2020 [cited by examiner]
US 20200154485A1 · Gao · 2020 [cited by examiner]
US 20200186218A1 · Wu et al. · 2020 [cited by applicant]
US 20200374960A1 · Deenoo et al. · 2020 [cited by applicant]
CN 102217362A · 2011 [cited by applicant]
CN 103607233A · 2014 [cited by applicant]
KR 1020160146887A · 2016 [cited by applicant]
KR 1020170089962A · 2017 [cited by applicant]
RU 2603969C2 · 2016 [cited by applicant]
WO 2017024516A1 · 2017 [cited by applicant]
3GPP TS 36.321 V14.3.0, “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification (R… [cited by applicant]
3GPP TS 36.331 V14.3.0, “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification … [cited by applicant]
3GPP TSG RAN WG1 Meeting #88, R1-1701716, Huawei et al., “Discussion on link recovery procedure for beam blockage,” Feb. 13-17, 2017, 4 pages, Athens, Greece. [cited by applicant]
3GPP TSG RAN WG1 Meeting #89, R1-1707782, Spreadtrum Communications, “Discussion on UE initiated recovery from beam failure,” May 15-19, 2017, 6 pages, Hangzhou, P.R. China. [cited by applicant]
3GPP TSG RAN WG1 NR Ad-Hoc#2, R1-1710596, Lenovo et al., “Discussion of beam recovery procedure,” Jun. 27-30, 2017, 6 pages, Qingdao, P.R. China. [cited by applicant]
3GPP TSG RAN WG1 NR Ad-Hoc#2, R1-1711291, Nokia et al., “Beam Recovery,” Jun. 27-30, 2017, 8 pages, Qingdao, P.R. China. [cited by applicant]
3GPP TSG-RAN WG1 #89ah-NR, R1-1711017, Ericsson, “Mechanism to recover from beam failure,” Jun. 27-30, 2017, 8 pages, Qingdao, China. [cited by applicant]
3GPP TSG-RAN WG1 NR#2, R1-1711161, Qualcomm Incorporated, “Beam recovery procedures,” Jun. 27-30, 2017, 6 pages, Qingdao, P.R. China. [cited by applicant]
3GPP TSG-RAN WG2 Meeting #NR Adhoc 2, R2-1707086, ASUSTeK, “Discussion on multiple random access parameters in NR,” Jun. 27-29, 2017, 4 pages, Qingdao, China. [cited by applicant]
3GPP TSG-RAN WG2 Meeting #NR AH2, R2-1706396, CATT, “Beam management,” Jun. 27-29, 2017, 6 pages, Qingdao, China. [cited by applicant]
CATT, “Beam Failure Detection and Recovery,” Aug. 21-25, 2017, 4 pages, 3GPP TSG RAN WG1 #90, R1-1712379, Prague, Czechia. [cited by applicant]
CMCC, “Discussion on UE Triggered Beam Reporting for Beam Recovery,” Feb. 13-17, 2017, 4 pages, 3GPP TSG RAN WG1 Meeting #88, R1-1703404, Athens, Greece. [cited by applicant]
Communication pursuant to Article 94(3) EPC, EP App. No. 18846478.8, Feb. 10, 2023, 11 pages. [cited by applicant]
Corrected Notice of Allowability, U.S. Appl. No. 17/820,868, May 3, 2023, 2 pages. [cited by applicant]
Examination Report No. 1, AU App. No. 2018317591, Aug. 17, 2020, 5 pages. [cited by applicant]
Examination Report, IN App. No. 202047006200, Feb. 26, 2021, 6 pages. [cited by applicant]
Extended European Search Report, EP App. No. 18846478.8, Apr. 22, 2021, 15 pages. [cited by applicant]
Final Office Action, U.S. Appl. No. 16/089,351, Jan. 17, 2020, 22 pages. [cited by applicant]
First Office Action, CN App. No. 201880052509.7, Mar. 26, 2021, 8 pages (2 pages of English Translation and 6 pages of Original Document). [cited by applicant]
First Office Action, MX App. No. MX/a/2020/001543, Apr. 5, 2023, 4 pages of Original Document Only. [cited by applicant]
Grant of Patent, KR App. No. 10-2020-7004701, Jun. 22, 2021, 4 pages (2 pages of English Translation and 2 pages of Original Document). [cited by applicant]
International Preliminary Report on Patentability (Chapter II), PCT App. No. PCT/CN2018/101051, Dec. 20, 2019, 7 pages. [cited by applicant]
International Search Report and Written Opinion for Application No. PCT/CN2018/101051, Nov. 27, 2018, 9 pages. [cited by applicant]
Lenovo et al. “Random access procedure for beam recovery request” 3GPP TSG-RAN WG2 Meeting#AH R2-1707001, Jun. 29, 2017. [cited by applicant]
MAC, “5G NR UE MAC procedures—Random Access”, 2017, 383213GPPN Release 15, 12 pages. [cited by applicant]
Mediatek Inc et al., “RLM/RLF Considering Beam Failure Recovery,” Aug. 21-25, 2017, 6 pages, 3GPP TSG-RAN WG2 Meeting #99, R2-1707998, Berlin, Germany. [cited by applicant]
Mediatek Inc., “Beam Management and Beam Recovery in MAC,” Aug. 21-25, 2017, 4 pages, 3GPP TSG-RAN WG2 Meeting #99, R2-1707999, Berlin, Germany. [cited by applicant]
Non-Final Office Action, U.S. Appl. No. 16/089,351, Jul. 22, 2019, 22 pages. [cited by applicant]
Non-Final Office Action, U.S. Appl. No. 17/085,329, Oct. 8, 2021, 16 pages. [cited by applicant]
Notice of Acceptance for Patent Application, AU App. No. 2018317591, Aug. 16, 2021, 3 pages. [cited by applicant]
Notice of Allowability, U.S. Appl. No. 16/089,351, Sep. 21, 2020, 3 pages. [cited by applicant]
Notice of Allowance, U.S. Appl. No. 16/089,351, Jul. 6, 2020, 8 pages. [cited by applicant]
Notice of Allowance, U.S. Appl. No. 17/085,329, Apr. 13, 2022, 8 pages. [cited by applicant]
Notice of Allowance, U.S. Appl. No. 17/085,329, Jul. 20, 2022, 2 pages. [cited by applicant]
Notice of Allowance, U.S. Appl. No. 17/820,868, Jan. 23, 2023, 11 pages. [cited by applicant]
Notice of Allowance, U.S. Appl. No. 18/304,339, Nov. 3, 2023, 15 pages. [cited by applicant]
Notice of Reasons for Refusal, JP App. No. 2020-508612, Dec. 2, 2021, 3 pages (3 pages of English Translation and 3 pages of Original Document). [cited by applicant]
Notice of Reasons for Refusal, JP App. No. 2020-508612, Jul. 21, 2021, 6 pages (3 pages of English Translation and 3 pages of Original Document). [cited by applicant]
Notice of Reasons for Refusal, JP App. No. 2022-071228, Mar. 22, 2023, 8 pages (4 pages of English Translation and 4 pages of Original Document). [cited by applicant]
Notification of Reason for Refusal, KR App. No. 10-2020-7004701, Dec. 16, 2020, 12 pages (6 pages of English Translation and 6 pages of Original Document). [cited by applicant]
Office Action, CN App. No. 201880052509.7, Jun. 1, 2022, 5 pages of Original Document Only. [cited by applicant]
Office Action, RU App. No. 2020107143, Jul. 31, 2020, 7 pages (2 pages of English Translation and 5 pages of Original Document). [cited by applicant]
Samsung, “Beam failure recovery”, 3GPP TSG RAN WG1 Meeting #90, R1-1713597, Aug. 21-25, 2017, 6 pages. [cited by applicant]
Samsung, “Relationship of NR Beam Recovery and RLF Procedures,” 3GPP TSG-RAN WG2 2017 RAN2 Ad-hoc Meeting, R2-1707304, Jun. 27-29, 2017, 5 pages. [cited by applicant]
Second Office Action, CN App. No. 201880052509.7, Dec. 8, 2021, 14 pages (6 pages of English Translation and 8 pages of Original Document). [cited by applicant]
VIVO, “Beam Recovery Based on NR-PDCCH and NR-PDSCH,” May 15-19, 2017, 6 pages, 3GPP TSG RAN WG1 Meeting #89, R1-1707245, Hangzhou, P.R. China. [cited by applicant]
ZTE, “Discussion on beam recovery mechanism”, 3GPP TSG RAN WG1 Meeting #89, R1-1707121, May 15-19, 2017, 8 pages. [cited by applicant]
ZTE, “Discussion on mechanism to recovery from beam failure”, 3GPP TSGRAN WG1 Meeting #90, R1-1712300, Aug. 21-25, 2017, 9 pages. [cited by applicant]
Hearing Notice, IN App. No. 202047006200, Jan. 19, 2024, 2 pages. [cited by applicant]