IP Library › Granted Patent US 12,648,043

Granted Patent B2

US 12,648,043 · App. 17/738,233 · Granted Jun 2, 2026

Communication method, apparatus, and system

Inventors: Le Yan (Shenzhen, CN); Tingting Geng (Shanghai, CN); Xingxing Hu (Shanghai, CN); Qinghai Zeng (Shanghai, CN)

Assignee: Huawei Technologies Co., Ltd.

H04W76/20 H04W36/0061 H04W36/0083 H04W36/305 H04W36/362

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Quick Facts

Patent No.: US 12,648,043
App. No.: 17/738,233
Granted: Jun 2, 2026
Kind: B2

External Links

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Abstract

A communication method, apparatus, and system, the method including receiving first indication information from a first network device, where the first indication information is requests a terminal device to report first information, and reporting the first information to the first network device, where the first information includes related information in a conditional handover procedure.

Claims (171)

1 . A communication method, comprising:

receiving first indication information from a first network device, wherein the first indication information requests a terminal device to report first information; and

reporting the first information to the first network device,

wherein when the terminal device receives conditional handover (CHO) configuration information of at least one candidate cell from a second network device and a radio link failure occurs in a source cell of the terminal device, conventional handover fails, or the terminal device fails to access a first candidate cell that meets a conditional handover execution condition, and a first cell selected by the terminal device by performing cell selection belongs to the at least one candidate cell and the terminal device performs an access or handover to the first cell,

the first information comprises identification information of the first cell, wherein the second network device is a network device to which the source cell of the terminal device belongs and the first candidate cell is one of the at least one candidate cell; or

a first cell selected by performing cell selection does not belong to the at least one candidate cell, and the terminal device performs a re-establishment procedure with the first cell being a re-establishment cell,

the first information comprises identification information of the first cell, wherein the second network device is a network device to which the source cell of the terminal device belongs, and wherein the first candidate cell is one of the at least one candidate cell;

wherein in a case of that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period 1 , wherein the time period 1 is a time period from a time point at which the terminal device receives a radio resource control (RRC) reconfiguration message carrying the CHO configuration information to a time point at which the radio link failure occurs in the source cell; or

a time period 1 ′ which is from the time point at which the radio link failure occurs in the source cell to a time point at which the terminal device reports the time period 1 ′; or

in a case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 6 , wherein the time period 6 is a time period from the time point at which the terminal device receives a conventional handover message to a time point at which the conventional handover fails; or

a time period 2 ′ which is from the time point at which the conventional handover fails to a time point at which the terminal device reports the time period 2 ′; or

in a case that the terminal device fails to access the first candidate cell that meets the conditional handover execution condition, the first information further comprises one or more of the following:

a time period 10 , wherein the time period 10 is a time period from a time point at which the terminal device receives the RRC reconfiguration message carrying the CHO configuration information to a time point at which the terminal device determines the first candidate cell that meets the conditional handover execution condition;

a time period 3 ′ is from the time period at which the terminal device receives the RRC reconfiguration message carrying the CHO configuration information to the time point at which the terminal device fails to access the first candidate cell; or

a time period 4 ′ is from the time period from the time point at which the terminal device fails to access the first candidate cell to a time point at which the terminal device reports the time period 4 ′.

2 . The method according to claim 1 , wherein at least one of:

the first information further comprises information indicating a signal quality corresponding to some or all candidate cells in the at least one candidate cell in response to the terminal device determining the first cell; or

the first information further comprises information indicating a signal quality corresponding to some or all candidate cells other than the first cell in the at least one candidate cell in response to the terminal device successfully accessing the first cell.

3 . The method according to claim 1 , wherein at least one of:

the first information further comprises information indicating signal quality corresponding to some or all candidate cells in the at least one candidate cell in response to the terminal device failing to access the first candidate cell.

4 . The method according to claim 1 , wherein in the case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period 2 , wherein the time period 2 is a time period from the time point at which the radio link failure occurs in the source cell to a time point at which the terminal device determines the first cell;

a time period 3 , wherein the time period 3 is a time period from the time point at which the terminal device determines the first cell to a time point at which the terminal device successfully accesses the first cell;

a time period 4 , wherein the time period 4 is a time period from the time point at which the terminal device successfully accesses the first cell to a time point at which the terminal device reports the time period 4 ; or

a time period comprising any two or more consecutive time periods in the time period 1 to the time period 4 .

5 . The method according to claim 1 , wherein in the case that the conventional handover fails, the first information further comprises at least one of the following:

a time period 5 , wherein the time period 5 is the time period from the time point at which the terminal device receives the RRC reconfiguration message to the time point at which the terminal device receives the conventional handover message;

a time period 7 , wherein the time period 7 is from the time point at which the conventional handover fails to a time period at which the terminal device determines the first cell;

a time period 8 , wherein the time period 8 is from the time point at which the terminal device determines the first cell to a time period at which the terminal device successfully accesses the first cell;

a time period 9 , wherein the time period 9 is from the time point at which the terminal device successfully accesses the first cell to a time period at which the terminal device reports the time period 9 ; or

a time period comprising any two or more consecutive time periods in the time period 5 to the time period 9 .

6 . The method according to claim 1 , wherein in the case that the terminal device fails to access the first candidate cell that meets the conditional handover execution condition, the first information further comprises one or more of the following:

a time period 11 , wherein the time period 11 is a time period from the time point at which the terminal device determines the first candidate cell that meets the conditional handover execution condition to a time point at which the terminal device fails to access the first candidate cell; or

a time period 12 , wherein the time period 12 is from the time point at which the terminal device fails to access the first candidate cell to a time point at which the terminal device determines the first cell;

a time period 13 , wherein the time period 13 is from the time point at which the terminal device determines the first cell to a time point at which the terminal device successfully accesses the first cell;

a time period 14 , wherein the time period 14 is from the time point at which the terminal device successfully accesses the first cell to a time point at which the terminal device reports the time period 14 ; or

a time period comprising any two or more consecutive time periods in the time period 10 to the time period 14 .

7 . The method according to claim 1 , wherein, before receiving the first indication information from the first network device, the method further comprises:

receiving indication information indicating to record the first information.

8 . The method according to claim 1 , wherein, before receiving the first indication information from the first network device, the method further comprises:

sending, to the first network device, indication information indicating that recording of the first information has been completed.

9 . A communication method, comprising:

sending, by a first network device, first indication information to a terminal device, wherein the first indication information is used to request the terminal device to report first information; and

receiving, by the first network device, the first information from the terminal device,

the first information comprises identification information of the first cell, wherein the second network device is a network device to which the source cell of the terminal device belongs, and the first candidate cell is one of the at least one candidate cell; or

when the terminal device receives the CHO configuration information of the at least one candidate cell from a second network device, and a radio link failure occurs in a source cell of the terminal device, conventional handover fails, or the terminal device fails to access a first candidate cell that meets a conditional handover execution condition, and a first cell selected by performing cell selection does not belong to the at least one candidate cell and the terminal device performs a re-establishment procedure with the first cell being a re-establishment cell,

the first information comprises identification information of the first cell, wherein the second network device is a network device to which the source cell of the terminal device belongs, and the first candidate cell is one of the at least one candidate cell;

wherein in a case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period 1 ′ which is from the time point at which the radio link failure occurs in the source cell to a time point at which the terminal device reports the time period 1 ′; or

in a case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 2 ′ which is from the time point at which the conventional handover fails to a time point at which the terminal device reports the time period 2 ′; or

10 . The method according to claim 9 , wherein at least one of:

the first information further comprises information indicating signal quality corresponding to some or all candidate cells other than the first cell in the at least one candidate cell in response to the terminal device successfully accessing the first cell.

11 . The method according to claim 9 , wherein at least one of:

12 . The method according to claim 9 , wherein in the case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period comprising any two or more consecutive time periods in the time period 1 to the time period 4 .

13 . The method according to claim 9 , wherein in the case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 5 , wherein the time period 5 is a time period from the time point at which the terminal device receives the RRC reconfiguration message to a time point at which the terminal device receives the conventional handover message;

a time period 7 , wherein the time period 7 is from the time point at which the conventional handover fails to a time period at which the terminal device determines the first cell;

a time period comprising any two or more consecutive time periods in the time period 5 to the time period 9 .

14 . The method according to claim 9 , wherein in the case that the terminal device fails to access the first candidate cell that meets the conditional handover execution condition, the first information further comprises one or more of the following:

a time period comprising any two or more consecutive time periods in the time period 10 to the time period 14 .

15 . The method according to claim 9 , wherein before sending the first indication information to the terminal device, the method further comprises:

receiving, from the terminal device, indication information indicating that recording of the first information has been completed.

16 . A communication apparatus, comprising a processor and an interface circuit, wherein the interface circuit is configured to communicate with a second apparatus, and wherein the processor is configured to perform steps for:

receiving first indication information from a first network device, wherein the first indication information requests a terminal device to report first information; and

reporting the first information to the first network device,

wherein when the terminal device receives conditional handover (CHO) configuration information of at least one candidate cell from a second network device and a radio link failure occurs in a source cell of the terminal device, conventional handover fails, or the terminal device fails to access a first candidate cell that meets a conditional handover execution condition, and a the first cell selected by the terminal device by performing cell selection belongs to the at least one candidate cell and the terminal device performs an access or handover to the first cell,

when the terminal receives the CHO configuration information of the at least one candidate cell from a second network device and a radio link failure occurs in a source cell of the terminal device, conventional handover fails, or the terminal device fails to access a first candidate cell that meets a conditional handover execution condition, and a first cell selected by performing cell selection does not belong to the at least one candidate cell, and the terminal device performs a re-establishment procedure with the first cell being a re-establishment cell,

the first information comprises identification information of the first cell, wherein the second network device is a network device to which the source cell of the terminal device belongs, and the first candidate cell is one of the at least one candidate cell;

wherein in a case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period 1 ′ which is from the time point at which the radio link failure occurs in the source cell to a time point at which the terminal device reports the time period 1 ′; or

in a case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 2 ′ which is from the time point at which the conventional handover fails to a time point at which the terminal device reports the time period 2 ′; or

17 . The communication apparatus according to claim 16 , wherein at least one of:

18 . The communication apparatus according to claim 16 , wherein at least one of:

the first information further comprises information indicating signal quality corresponding to some or all candidate cells in the at least one candidate cell in response to the conditional handover execution condition corresponding to the first candidate cell being met; or

19 . The communication apparatus according to claim 16 , wherein in the case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period comprising any two or more consecutive time periods in the time period 1 to the time period 4 ; or

in the case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 5 , wherein the time period 5 is a time period from a time point at which the terminal device receives the RRC reconfiguration message to a time point at which the terminal device receives the conventional handover message;

a time period 7 , wherein the time period 7 is from the time point at which the conventional handover fails to a time period at which the terminal device determines the first cell;

a time period comprising any two or more consecutive time periods in the time period 5 to the time period 9 ; or

in the case that the terminal device fails to access the first candidate cell that meets the conditional handover execution condition, the first information further comprises one or more of the following:

a time period comprising any two or more consecutive time periods in the time period 10 to the time period 14 .

20 . The apparatus according to claim 16 , wherein the processor is further configured to perform steps for:

sending, to the first network device, before receiving first indication information from the first network device, indication information indicating that recording of the first information has been completed.

21 . A communication apparatus, being a first network device or a chipset for the first network device and comprising a processor and an interface circuit, wherein the interface circuit communicates with a second apparatus, and the processor is configured to perform steps for:

sending first indication information to a terminal device, wherein the first indication information requests the terminal device to report first information; and

receiving the first information from the terminal device;

when the terminal receives the CHO configuration information of the at least one candidate cell from a second network device, and a radio link failure occurs in a source cell of the terminal device, conventional handover fails, or the terminal device fails to access a first candidate cell that meets a conditional handover execution condition, and a first cell selected by performing cell selection does not belong to the at least one candidate cell, and the terminal device performs a re-establishment procedure with the first cell being a re-establishment cell,

the first information comprises identification information of the first cell, wherein the second network device is a network device to which the source cell of the terminal device belongs, and the first candidate cell is one of the at least one candidate cell;

wherein in a case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period 1 ′ which is from the time point at which the radio link failure occurs in the source cell to a time point at which the terminal device reports the time period 1 ′; or

in a case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 2 ′ which is from the time point at which the conventional handover fails to a time point at which the terminal device reports the time period 2 ′; or

22 . The communication apparatus according to claim 21 , wherein at least one of:

23 . The communication apparatus according to claim 21 , wherein at least one of:

24 . The communication apparatus according to claim 21 , wherein in the case that the radio link failure occurs in the source cell of the terminal device, the first information further comprises one or more of the following:

a time period comprising any two or more consecutive time periods in the time period 1 to the time period 4 ; or

in the case that the conventional handover fails, the first information further comprises one or more of the following:

a time period 7 , wherein the time period 7 is from the time point at which the conventional handover fails to a time period at which the terminal device determines the first cell;

a time period comprising any two or more consecutive time periods in the time period 5 to the time period 9 ; or

a time period comprising any two or more consecutive time periods in the time period 10 to the time period 14 .

25 . The apparatus according to claim 21 , wherein the processor is further configured to perform steps for:

receiving, before sending the first indication information to the terminal device, from the terminal device, indication information indicating that recording of the first information has been completed.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 11, 2026

From: YAN, LE; GENG, TINGTING; HU, XINGXING; ZENG, QINGHAI

To: HUAWEI TECHNOLOGIES CO., LTD.

Reel/Frame 073761/0853 →

Continuity (2)

Continuation PCTCN2019116868 · Nov 8, 2019

Related Publication 20220264401A1 · Aug 18, 2022

References Cited (10)

US 20140148174A1 · Teyeb et al. · 2014 [cited by applicant]

CN 107113673A · 2017 [cited by applicant]

CN 110278574A · 2019 [cited by applicant]

CN 110366212A · 2019 [cited by applicant]

WO 2014163553A1 · 2014 [cited by applicant]

WO 2019175463A1 · 2019 [cited by applicant]

WO WO2021057702A1 · 2021 [cited by examiner]

Chang N, WO2021057702A1_Translated, 2021 (Year: 2021). [cited by examiner]

“Discussion on RLF reporting for SON,” Agenda Item: 11.12.4, SON, Source: Huawei, HiSilicon, Document for. Discussion and Decision, 3GPP TSG-RAN WG2 Meeting#107, R2-1909738, Prague, Czech Republic, Aug. 26-30, 2019, 6 p… [cited by applicant]

“On RLF reporting for CHO and DAPS,” Agenda item: 6.9.3.2, Source: Nokia, Nokia Shanghai Bell, WID/SID: NR_Mob_enh-Core—Release 16, Document for: Discussion and Decision, 3GPP TSG-RAN WG2 Meeting #108, R2-1915497, Reno,… [cited by applicant]