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US 2012/0069732 A1Published application
Apparatus and method for detectiong cause of radio link failure or handover failure in mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsLixiang XU, Gert-Jan VAN LIESHOUT, Himke VAN DER VELDE
Life of this patent
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Abstract
A terminal, a Base Station (BS) and a method for detecting a cause of a Radio Link Failure (RLF) or handover failure are provided. The method includes determining whether an RLF or a handover failure occurs, performing a process of a connection re-establishment or connection establishment to enter a connection mode after encountering the RLF or the handover failure, and transmitting an RLF information report to a BS after entering the connection mode.
Claims28
A method for operating a terminal in a mobile communication system, the method comprising:
- determining whether a Radio Link Failure (RLF) or a handover failure occurs;
- performing a process of a connection re-establishment or connection establishment to enter a connection mode after encountering the RLF or the handover failure;
- and
- transmitting an RLF information report to a Base Station (BS) after entering the connection mode,
- wherein the RLF information report comprises at least one of information on whether the terminal has been recently handed over before encountering the RLF or the handover failure, results of measuring by the terminal a serving cell of the terminal and a neighboring cell of the terminal when the RLF or the handover failure occurs, an identity of a cell where the terminal is located before the terminal hands over to a cell in which the RLF or the handover failure occurs, an identity of the cell in which the RLF or the handover failure occurs, and, an amount of time between when the RLF or the handover failure occurs and when a subsequent connection re-establishment success or connection establishment success occurs.
2 more elements
A method for operating a Base Station (BS) in a mobile communication system, the method comprising:
- performing a process of a connection re-establishment or connection establishment for a terminal encountering a Radio Link Failure (RLF) or a handover failure;
- receiving an RLF information report from the terminal;
- and
- transmitting the RLF information report to another BS which controls a cell where the RLF or the handover failure occurs,
- wherein the RLF information report comprises at least one of information on whether the terminal has been recently handed over before encountering the RLF or the handover failure, results of measuring by the terminal a serving cell of the terminal and a neighboring cell of the terminal when the RLF or the handover failure occurs, an identity of a cell where the terminal is located before the terminal hands over to a cell in which the RLF or the handover failure occurs, an identity of the cell in which the RLF or the handover failure occurs, and, an amount of time between when the RLF or the handover failure occurs and when the subsequent connection re-establishment success or connection establishment success occurs.
2 more elements
A method for operating a Base Station (BS) in a mobile communication system, the method comprising:
- receiving an RLF information report generated by a terminal encountering a Radio Link Failure (RLF) or a handover failure from another BS;
- and
- determining a cause of the RLF or the handover failure using the RLF information report,
- wherein the RLF information report comprises at least one of information on whether the terminal has been recently handed over before encountering the RLF or the handover failure, results of measuring by the terminal a serving cell of the terminal and a neighboring cell of the terminal when the RLF or the handover failure occurs, an identity of a cell where the terminal is located before the terminal hands over to a cell in which the RLF or the handover failure occurs, an identity of the cell in which the RLF or the handover failure occurs, and, an amount of time between when the RLF or the handover failure occurs and when the subsequent connection re-establishment success or connection establishment success occurs.
1 more element
A terminal for use in a mobile communication system, the terminal comprising:
- a controller for determining whether a Radio Link Failure (RLF) or a handover failure occurs, and for performing a process of a connection re-establishment or connection establishment to enter a connection mode after encountering the RLF or the handover failure;
- and
- a modem for transmitting an RLF information report to a Base Station (BS) after entering the connection mode,
- wherein the RLF information report comprises at least one of information on whether the terminal has been recently handed over before encountering the RLF or the handover failure, results of measuring by the terminal a serving cell of the terminal and a neighboring cell of the terminal when the RLF or the handover failure occurs, an identity of a cell where the terminal is located before the terminal hands over to a cell in which the RLF or the handover failure occurs, an identity of the cell in which the RLF or the handover failure occurs, and, an amount of time between when the RLF or the handover failure occurs and when a subsequent connection re-establishment success or connection establishment success occurs.
1 more element
A Base Station (BS) for use in a mobile communication system, the BS comprising:
- a controller for performing a process of a connection re-establishment or connection establishment for a terminal encountering a Radio Link Failure (RLF) or a handover failure;
- a modem for receiving an RLF information report from the terminal;
- and
- a backhaul communication unit for transmitting the RLF information report to another BS which controls a cell where the RLF or the handover failure occurs,
- wherein the RLF information report comprises at least one of information on whether the terminal has been recently handed over before encountering the RLF or the handover failure, results of measuring by the terminal a serving cell of the terminal and a neighboring cell of the terminal when the RLF or the handover failure occurs, an identity of a cell where the terminal is located before the terminal hands over to the cell in which the RLF or the handover failure occurs, an identity of the cell in which the RLF or the handover failure occurs, and, an amount of time between when the RLF or the handover failure occurs and when the subsequent connection re-establishment success or connection establishment success occurs.
2 more elements
A Base Station (BS) for use in a mobile communication system, the BS comprising:
- a backhaul communication unit for receiving an RLF information report generated by a terminal encountering a Radio Link Failure (RLF) or a handover failure from another BS;
- and
- a controller for determining a cause of the RLF or the handover failure using the RLF information report,
- wherein the RLF information report comprises at least one of information on whether the terminal has been recently handed over before encountering the RLF or the handover failure, results of measuring by the terminal a serving cell of the terminal and a neighboring cell of the terminal when the RLF or the handover failure occurs, an identity of a cell where the terminal is located before the terminal hands over to a cell in which the RLF or the handover failure occurs, an identity of the cell in which the RLF or the handover failure occurs, and, an amount of time between when the RLF or the handover failure occurs and when the subsequent connection re-establishment success or connection establishment success occurs.
1 more element
Dependencies are inferred from the claim text.