IP Library › Granted Patent US 12,425,923
Granted Patent B2
US 12,425,923 · App. 17/232,996 · Granted Sep 23, 2025

Radio communication device and radio communication method for executing process corresponding to reception state information

Inventors: Yoshiaki Ohta (Yokohama, JP); Shinichiro Aikawa (Yokohama, JP)
Assignee: FUJITSU LIMITED
H04W28/18H04L1/1614H04L1/188H04L47/34H04W28/0205H04W28/04H04W76/15H04L2001/0096H04L43/0811H04W84/045H04W92/20
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 12,425,923
App. No.
17/232,996
Granted
Sep 23, 2025
Kind
B2
Abstract

A radio communication device includes a reception unit that receives a part of data transmitted from a first communication device, via a first path including a radio channel between the radio communication device and the first communication device and that receives another part of data transmitted from the first communication device, via a second path that goes through a second communication device; a control unit that performs communication control in accordance with a state of data communication performed via the second path; and a transmission unit that transmits, to the first communication device via the first path by using control performed by the control unit in accordance with the state of the data communication performed via the second path, reception state information that specifies data that has been received or data that has not been received by the reception unit.

Claims (57)

1. A radio communication device comprising:

a communicator configured to have a wireless connection with a first communication device and a second communication device to perform radio communication; and

controller circuitry configured to:

perform a control for connection change in the wireless connection, when the communicator receives from the first communication device, an RRC signal that includes both first information instructing the connection change in the wireless connection and second information indicating that reception state information is transmitted, and

a process corresponding to the reception state information received by the communicator in accordance with the connection change, the reception state information specifying:

whether or not data that is transmitted to the first communication device has already been received; or

whether or not data that is transmitted to the second communication device has already been received.

2. The radio communication device according to claim 1 , wherein

the communicator receives the reception state information after the connection change.

3. The radio communication device according to claim 1 , wherein

the communicator transmits data to which an identifier indicating an order of the data is added, and

receives the reception state information that includes therein both the identifier of the first unreceived data and information that indicates whether a predetermined number of pieces of data to each of which an identifier indicating that the order is subsequent to the identifier of the first unreceived data has already been received.

4. The radio communication device according to claim 1 , wherein

the communicator receives first data via a first path between the radio communication device and the first communication device, and receives second data from the first communication device via the second communication device.

5. The radio communication device according to claim 1 , wherein

the reception state information is related to data lost between the first communication device and the second communication device, and is transmitted from the first communication device to the communicator.

6. The radio communication device according to claim 1 , wherein

the first communication device is a first base station, and

the second communication device is a second base station.

7. The radio communication device according to claim 1 , wherein the reception state information specifies:

whether or not data that is transmitted to the first communication device has already been received by the first communication device; and

whether or not data that is transmitted to the second communication device has already been received by the second communication device.

8. A radio communication device comprising:

a communicator configured to connect to a first communication device and a second communication device and to perform radio communication with the first communication device; and

controller circuitry configured to perform a control relating to a wireless connection with the first communication device,

the communicator is further configured to:

transmit, to the first communication device, an RRC signal that includes both first information instructing the connection change in the wireless connection and second information indicating that reception state information is transmitted, and

transmit, to the first communication device in accordance with the connection change, the reception state information specifying:

whether or not data that is transmitted to the first communication device has already been received; or

whether or not data that is transmitted to the second communication device has already been received.

9. The radio communication device according to claim 8 , wherein

the communicator is configured to receive data from the first communication device via the second communication device.

10. The radio communication device according to claim 8 , wherein

the communicator is configured to receive data to which an identifier indicating an order of the data is added, and

transmit the reception state information that includes therein both the identifier of the first unreceived data and information that indicates whether a predetermined number of pieces of data to each of which an identifier indicating that the order is subsequent to the identifier of the first unreceived data has already been received.

11. The radio communication device according to claim 8 , wherein

the reception state information is related to data lost between the first communication device and the second communication device.

12. A radio communication system comprising

a first communication device, a second communication device and a third communication device, wherein

the first communication device comprises:

a first communicator configured to have a wireless connection with the second communication device and the third communication device to perform radio communication; and

first controller circuitry configured to:

perform a control for connection change in the wireless connection, when the first communicator receives from the second communication device, an RRC signal that includes both first information instructing the connection change in the wireless connection and second information indicating that reception state information is transmitted, and

a process corresponding to the reception state information received by the first communicator in accordance with the connection change, the reception state information specifying:

whether or not data that is transmitted to the second communication device has already been received; or

whether or not data that is transmitted to the third communication device has already been received,

and

the second communication device comprises:

a second communicator configured to connect to the first communication device and the third communication device and to perform radio communication with the first communication device; and

second controller circuitry configured to perform a control relating to a wireless connection with the first communication device,

the second communicator is further configured to:

transmit, to the first communication device, an RRC signal that includes both first information instructing the connection change device in the wireless connection and second information indicating that reception state information is transmitted, and

transmit, to the first communication device in accordance with the connection change, the reception state information specifying:

whether or not data that is transmitted to the first communication device has already been received; or

whether or not data that is transmitted to the third communication device has already been received.

13. The radio communication system according to claim 12 , wherein

the reception state information is related to data lost between the first communication device and the second communication device.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE THE APPLICATION NUMBER 19345640 TO CHANGE IT TO 19346640 AND TO CORRECT THE APPLICATION 19317078 TO CHANGE IT TO 19319078. PREVIOUSLY RECORDED ON REEL 73477 FRAME 351. ASSIGNOR(S) HEREBY CONFIRMS THE THE ASSIGNMENT. Recorded Jan 20, 2026
From: FUJITSU LIMITED
To: 1FINITY INC.
Reel/Frame 075265/0471 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 3, 2025
From: FUJITSU LIMITED
To: 1FINITY INC.
Reel/Frame 073477/0351 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 16, 2021
From: OHTA, YOSHIAKI; AIKAWA, SHINICHIRO
To: FUJITSU LIMITED
Reel/Frame 055946/0896 →
Continuity (3)
Continuation 15269372 · Sep 19, 2016
Continuation PCTJP2014057915 · Mar 20, 2014
Related Publication 20210234807A1 · Jul 29, 2021
References Cited (62)
US 6545981B1 · Garcia et al. · 2003 [cited by applicant]
US 20070217432A1 · Molisch et al. · 2007 [cited by applicant]
US 20090196191A1 · Fischer · 2009 [cited by examiner]
US 20090262678A1 · Oyman et al. · 2009 [cited by applicant]
US 20100177736A1 · Wang · 2010 [cited by examiner]
US 20110243085A1 · Seo et al. · 2011 [cited by applicant]
US 20110261745A1 · Bontu et al. · 2011 [cited by applicant]
US 20150043435A1 · Blankenship · 2015 [cited by examiner]
US 20150131578A1 · Baek · 2015 [cited by examiner]
US 20150133122A1 · Chen · 2015 [cited by applicant]
US 20150223282A1 · Vajapeyam et al. · 2015 [cited by applicant]
US 20160119826A1 · Huh · 2016 [cited by examiner]
US 20160249232A1 · Uchino et al. · 2016 [cited by applicant]
US 20160255675A1 · Van Lieshout · 2016 [cited by examiner]
US 20160262149A1 · Futaki et al. · 2016 [cited by applicant]
JP 2011514033A · 2011 [cited by applicant]
KR 1020090122030A · 2009 [cited by applicant]
KR 1020100082287A · 2010 [cited by applicant]
WO 2009099265A1 · 2009 [cited by applicant]
WO 2011155256A1 · 2011 [cited by applicant]
3GPP TS 36.300 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA)and Evolved Universal Terrestrial Radio Access Network(E… [cited by applicant]
3GPP TS 36.211 V12.0.0 “3rd Generation Partnership Project;Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA);Physical channels and modulation (Release 12)”, Dec. 201… [cited by applicant]
3GPP TS 36.212 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA);Multiplexing and channel coding (Release 12)”, Dec. 201… [cited by applicant]
3GPP TS 36.213 V12.0.0 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA);Physical layer procedures(Release 12), Dec. 2013. [cited by applicant]
3GPP TS 36.321 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA);Medium Access Control (MAC) protocol specification (Rel… [cited by applicant]
3GPP TS 36.322 V11.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA);Radio Link Control (RLC) protocol specification(Release… [cited by applicant]
3GPP TS 36.323 V11.2.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Packet Data Convergence Protocol (PDCP) specification … [cited by applicant]
3GPP TS 36.331 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification(R… [cited by applicant]
3GPP TS 36.413 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access Network(E-UTRAN);S1 Application Protocol (S1AP) (Release 12)”, D… [cited by applicant]
3GPP TS 36.423 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 application protocol (X2AP) (Release 12)”,… [cited by applicant]
3GPP TR 36.842 V12.0.0 “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on Small Cell enhancements for E-UTRA and E-UTRAN; Higher layer aspects(Release 12)”, Dec. 2013. [cited by applicant]
International Search Report with Written Opinion of the International Searching Authority issued for corresponding International Patent Application No. PCT/JP2014/057915, mailed Jun. 24, 2014, with an English translatio… [cited by applicant]
Extended European search report with supplementary European search report and the European search opinion issued by the European Patent Office for corresponding European Patent Application No. 14886402.8, mailed on Mar.… [cited by applicant]
Hoshyar et al, “Performance Evaluation of HARQ Schemes for Cooperative Regenerative Relaying”, IEEE copyright 2009. [cited by applicant]
Notice of Preliminary Rejection issued by the Korean Intellectual Property Office for corresponding Korean Patent Application No. 10-2016-7025856, mailed on Jul. 17, 2017, with English translation. [cited by applicant]
Intel Corporation, “PDCP reordering for option 3C in dual connectivity”, Agenda Item: 7.2.1, 3GPP TSG-RAN WG2 Meeting #85, R2-140269, Prague, Czech Republic, Feb. 10-14, 2014. [cited by applicant]
Notification of Reasons for Refusal issued by the Japan Patent Office for corresponding Japanese Patent Application No. 2016-508437, mailed on Jul. 3, 2018, with an English translation. [cited by applicant]
Broadcom Corporation, “SCG handover for Dual Connectivity,” Agenda Item 7.2.1, 3GPP TSG-RAN WG2, Meeting #85, R2-140424, Prague, Czech Republic, Feb. 10-14, 2014. [cited by applicant]
Mediatek Inc., “Signaling Procedure for Dual Connectivity,” Agenda Item 7.2.1, 3GPP TSG-RAN2, Meeting #85, R2-140196, Prague, Czech Republic, Feb. 10-14, 2014. [cited by applicant]
Ericsson, “Dual Connectivity—non-mobility scenarios,” Agenda Item 20.1, 3GPP TSG-RAN WG3, Meeting #83, R3-140344, Prague, Czech Republic, Feb. 10-14, 2014. [cited by applicant]
Notice of Preliminary Rejection issued by the Korean Intellectual Property Office for corresponding Korean Patent Application No. 10-2018-7011785, mailed on Jul. 3, 2018, with English translation. [cited by applicant]
Pantech, “Signal flow modeling of SeNB change on dual connectivity”, Agenda Item: 7.2.2.1, 3GPP TSG-RAN WG2 Meeting #84, R2-134341, San Francisco, USA, Nov. 11-15, 2013. [cited by applicant]
First Notification of Office Action issued by the China National Intellectual Property Administration for corresponding Chinese Patent Application No. 201480077338.5, dated Dec. 25, 2018, with an English translation. [cited by applicant]
Japanese Office Action issued for corresponding Japanese Patent Application No. 2016-508437, drafted Jul. 23, 2019 and mailed Jul. 30, 2019, with English translation. [cited by applicant]
Huawei, “X2 Signalling to Support Dual Connectivity,” Agenda Item: 20.1, 3GPP TSG-RAN WG3 Meeting #83, R3-140118, Feb. 10-14, 2014, Prague, Czech Republic. [cited by applicant]
Trial and Appeal Decision for Appeal 2019-7524, issued for corresponding Japanese Patent Application No. 2016-508437, mailed on Feb. 12, 2020, with English translation. [cited by applicant]
3GPP TR 36.842 V1.0.0, “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Study on Small Cell Enhancements for E-UTRA and E-UTRA… [cited by applicant]
Huawei, “Data Transmission to Support Dual Connectivity UP 3C,” Agenda Item: 20.2, 3GPP TSG-RAN WG3 Meeting #83, R3-140120, Feb. 10-14, 2014, Prague, Czech Republic. [cited by applicant]
Notice of Reasons for Refusal issued by the Japan Patent Office for corresponding Japanese Patent Application No. 2019-105746, mailed on May 19, 2020, with a full English machine translation. [cited by applicant]
Huawei et al., “PDCP Reordering Operation for the Alternative 3C”, Agenda Item: 7.2.1, 3GPP TSG-RAN WG2 Meeting #85, R2-140053, Prague, Czech Republic, Feb. 10-14, 2014. [cited by applicant]
Decision of Refusal issued by the Japan Patent Office for corresponding Japanese Patent Application No. 2019-105746, mailed on Jan. 5, 2021, with an English translation. [cited by applicant]
Communication pursuant to Article 94(3) EPC issued by the European Patent Office for corresponding European Patent Application No. 14 886 402.8-1207, mailed on Jan. 13, 2021. [cited by applicant]
Non-Final Office Action issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Jan. 18, 2018. [cited by applicant]
Final Office Action issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Jul. 10, 2018. [cited by applicant]
Non-Final Office Action issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Mar. 1, 2019. [cited by applicant]
Final Office Action issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Aug. 5, 2019. [cited by applicant]
Non-Final Office Action issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Feb. 14, 2020. [cited by applicant]
Final Office Action issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Jun. 17, 2020. [cited by applicant]
Notice of Allowance and Fee(s) Due issued by the United States Patent and Trademark Office for corresponding U.S. Appl. No. 15/269,372, electronically delivered on Jan. 15, 2021. [cited by applicant]
Notice of Reasons for Refusal issued by the Japan Patent Office for corresponding Japanese Patent Application No. 2022-014549, mailed on Feb. 7, 2023, with an English translation. [cited by applicant]
ZTE Corporation, “Discussion on PDCP reordering issue for small cell”, Agenda Item: 7.2.1, 3 GPP TSG-RAN2 Meeting #85, R2-140115, Prague, Czech, Jan. 10-14, 2014. [cited by applicant]
Notice of Reasons for Refusal issued by the Japan Patent Office for corresponding Japanese Patent Application No. 2023-132364, dated Oct. 22, 2024, with an English translation. [cited by applicant]