Method and Device for Processing Radio Link Failure

Patent metadata

Field	Value
Publication number	US-2016338136-A1
Application number	US-201615224227-A
Country	US
Kind code	A1
Filing date	Jul 29, 2016
Priority date	Jan 29, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

A method, performed by a user equipment, may include: detecting whether a failure occurs on a radio link established between the user equipment and a second network device; and sending a first message to a first network device in response to a detection that a failure occurs on the radio link established between the user equipment and the second network device. The first message is used for indicating that a failure occurs on the radio link established between the user equipment and the second network device.

First claim

What is claimed is:

1 . A method, comprising:
detecting, by a user equipment, whether a failure occurs on a radio link established between the user equipment and a second network device; and sending, by the user equipment, a first message to a first network device in response to a detection that a failure occurs on the radio link established between the user equipment and the second network device, wherein the first message is used for indicating that a failure occurs on the radio link established between the user equipment and the second network device.

2 . The method according to claim 1 , wherein the user equipment determines that a failure occurs on a radio link established between the user equipment and a second network device in response to at least one of:
a quantity of random access request retransmissions by the user equipment over a first radio link reaches or exceeds a maximum quantity of random access preamble retransmissions, wherein the first radio link is any radio link established between the user equipment and the second network device; a timer corresponding to a first cell reaches or exceeds duration of the timer, wherein the first cell is any cell of the second network device; or a quantity of radio link control (RLC) uplink data retransmissions by the user equipment over a first radio bearer reaches or exceeds a maximum quantity of RLC uplink data retransmissions, wherein the first radio bearer is any radio bearer over which the second network device serves the user equipment, and is borne on one or more radio links established between the user equipment and the second network device.

3 . The method according to claim 2 , further comprising receiving a configuration parameter, wherein the configuration parameter comprises at least one of the maximum quantity of random access preamble retransmissions; the duration of the timer; or the maximum quantity of RLC uplink data retransmissions.

4 . The method according to claim 1 , wherein the first message carries a link failure related identifier, and the link failure related identifier comprises at least one of an identifier of a cell corresponding to the radio link on which the failure occurs; an identifier of a secondary cell group (SCG) where a cell corresponding to the radio link on which the failure occurs belongs; an identifier of a timing advance group (TAG) where a cell corresponding to the radio link on which the failure occurs belongs; or an identifier of a bearer corresponding to the radio link on which the failure occurs.

5 . The method according to claim 1 , wherein the first message carries a link failure cause.

6 . The method according to claim 5 , wherein the link failure cause comprises at least one of a random access problem; a quantity of random access preamble retransmissions reaching or exceeding a maximum quantity of random access preamble retransmissions; a quantity of RLC uplink data retransmissions reaching or exceeding a maximum quantity of RLC uplink data retransmissions; expiration of a timer; or a reconfiguration failure.

7 . The method according to claim 1 , further comprising:
receiving an instruction message sent by the first network device, wherein the instruction message is used for instructing the user equipment to release a cell, a secondary cell group (SCG), a timing advance group (TAG), or a bearer; and releasing a cell, an SCG, a TAG, or a bearer according to the instruction message.

8 . A method, comprising:
receiving, by a first network device, a first message, wherein the first message is reported to the first network device by a user equipment or a second network device when a failure occurs on a radio link established between the user equipment and the second network device; and determining, by the first network device according to the first message, that a failure occurs on the radio link established between the user equipment and the second network device.

9 . The method according to claim 8 , wherein the first message carries a link failure related identifier, and the link failure related identifier comprises at least one of an identifier of a cell corresponding to the radio link on which the failure occurs; an identifier of a secondary cell group (SCG) where a cell corresponding to the radio link on which the failure occurs belongs; an identifier of a timing advance group (TAG) where a cell corresponding to the radio link on which the failure occurs belongs; or an identifier of a bearer corresponding to the radio link on which the failure occurs.

10 . The method according to claim 8 , wherein the first message carries a link failure cause.

11 . The method according to claim 8 , further comprising sending a first configuration parameter to the user equipment, wherein the first configuration parameter comprises at least one of a maximum quantity of random access preamble retransmissions; duration of a timer; or a maximum quantity of radio link control (RLC) uplink data retransmissions.

12 . A device, located on a user equipment side, comprising:
a processor; and a computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
detecting whether a failure occurs on a radio link established between user equipment and a second network device; and
sending a first message to a first network device when it is detected that a failure occurs on the radio link established between the user equipment and the second network device, wherein the first message is used for indicating that a failure occurs on the radio link established between the user equipment and the second network device.

13 . The device according to claim 12 , wherein it is determined that a failure occurs on a radio link established between the user equipment and a second network device in response to a detection of at least one of:
a quantity of random access request retransmissions by the user equipment over a first radio link reaches or exceeds a maximum quantity of random access preamble retransmissions, wherein the first radio link is any radio link established between the user equipment and the second network device; a timer corresponding to a first cell reaches or exceeds duration of the timer, wherein the first cell is any cell of the second network device; or a quantity of radio link control (RLC) uplink data retransmissions by the user equipment over a first radio bearer reaches or exceeds a maximum quantity of RLC uplink data retransmissions, wherein the first radio bearer is any radio bearer over which the second network device serves the user equipment, and is borne on one or more radio links established between the user equipment and the second network device.

14 . The device according to claim 13 , wherein the program further includes instructions for:
receiving a configuration parameter, wherein the configuration parameter comprises at least one of the maximum quantity of random access preamble retransmissions; the duration of the timer; or the maximum quantity of RLC uplink data retransmissions.

15 . The device according to claim 12 , wherein the first message carries a link failure related identifier, and the link failure related identifier comprises at least one of an identifier of a cell corresponding to the radio link on which the failure occurs; an identifier of a secondary cell group (SCG) where a cell corresponding to the radio link on which the failure occurs belongs; an identifier of a timing advance group (TAG) where a cell corresponding to the radio link on which the failure occurs belongs; or an identifier of a bearer corresp

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Tao
• Gao Yongqiang
• Lin Bo

Classifications

• H04W76/19 Primary

  Connection re-establishment · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• H04W36/30

  by measured or perceived connection quality data · CPC title

• H04W76/028 Primary

  Electricity · mapped topic