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US 10,952,116 B2Granted
Communication system
AssigneeNEC Corporation
InventorsYuhua Chen, Vivek Sharma, Hisashi Futaki
Life of this patent
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Abstract
A communication system is disclosed, in which a mobile telephone communicates user data substantially simultaneously via a first base station and a second base station of the communication system. The mobile telephone detects a problem in communications with the second base station and transmits, to the first base station on detection of a problem in communications with said second base station, an indication of the detected problem in communications with the second base station.
Claims11
A user equipment (UE), the UE comprising:
- a memory storing instructions;
- one or more processors configured to execute the instructions stored in the memory to:
- communicate user data, in a dual connectivity (DC) in which the UE is connected to a master base station and a secondary base station;
- and
- detect a radio link failure for a secondary cell group (SCG);
- wherein,
- on detection of the radio link failure for the SCG, the one or more processors are further configured to initiate a procedure to report the radio link failure for the SCG, upon initiating the procedure the one or more processors are further configured to suspend at least one SCG communication bearer associated with the SCG, the suspended at least one SCG communication bearer being a communication bearer having protocols located in a secondary base station operating a secondary cell but not in the master base station, and the secondary base station is connected directly with a serving gateway (S-GW) in a core network, and to provide an indication of a failure type, wherein said indication of a failure type is configurable to indicate any one of at least the following:
- a timer has expired, a random access problem, or a maximum number of Radio Link Control (RLC) retransmissions has been reached.
5 more elements
A method performed by a user equipment (UE), the method comprising:
- communicating user data, in a dual connectivity (DC) in which the UE is connected to a master base station and a secondary base station;
- and
- detecting a radio link failure for a secondary cell group (SCG);
- wherein on detection of the radio link failure for the SCG, the UE initiates a procedure to report the radio link failure the SCG and upon initiating the procedure, the UE suspends at least one SCG communication bearer associated with the SCG, the suspended at least one SCG communication bearer being a communication bearer having protocols located in a secondary base station operating a secondary cell but not in the master base station, and the secondary base station is connected directly with a serving gateway (S-GW) in a core network, and provides an indication of a failure type, wherein said indication of a failure type is configurable to indicate any one of at least the following:
- a timer has expired, a random access problem, or a maximum number of Radio Link Control (RLC) retransmissions has been reached.
2 more elements
Dependencies are inferred from the claim text.