Handling radio link failure in cellular mesh networks
AssigneeSamsung Electronics Co., Ltd.
InventorsJeongho Jeon, Vishnu Vardhan Ratnam, Joonyoung Cho
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for handling radio link failure (RLF) in a wireless communication network. A method for operating a base station (BS) includes detecting occurrence of a RLF on a backhaul link with a parent BS of the BS and transmitting to a wireless communication device connected to the BS a first notification of the RLF indicating to hold data to be transmitted from the wireless communication device to the BS. The method further includes determining whether connection to a core network entity in the wireless communication network can be reestablished and transmitting to the wireless communication device a second notification based on the reestablishment determination.
Claims25
A base station (BS) in a wireless communication network, the BS comprising:
- a processor configured to:
- detect occurrence of a radio link failure (RLF) on a backhaul link with a parent BS of the BS;
- and
- a transceiver operably connected to the processor, the transceiver configured to transmit, to a wireless communication device connected to the BS:
- a first notification indicating for the wireless communication device to hold data to be transmitted from the wireless communication device to the BS;
- in response to reestablishment of the connection to a core network entity, a second notification indicating for the wireless communication device to resume transmitting data via a first alternate communication path;
- and
- in response to failing to reestablish the connection to the core network entity, a third notification indicating for the wireless communication device to establish a second alternate communication path to the core network entity,
- wherein the second notification comprises updated route information for the first alternate communication path, and
- wherein the transceiver is configured to transmit the third notification along with data that has been received from the wireless communication device if the BS determines that RLF is unrecoverable.
A wireless communication device in a wireless communication network, the wireless communication device comprising:
- a transceiver configured to receive, from a base station (BS), a first notification indicating occurrence of a radio link failure (RLF) on a backhaul link of the BS with a parent BS of the BS;
- and
- a processor operably connected to the transceiver, the processor configured to determine, based on the first notification, to hold data to be transmitted by the wireless communication device to the BS,
- wherein the transceiver is further configured to receive a second notification when the BS can reestablish connection to a core network entity in the wireless communication network,
- wherein the processor is configured to determine, based on the second notification, a first alternate communication path to resume transmitting data by the wireless communication device to the BS,
- wherein the transceiver is further configured to receive a third notification when the BS cannot reestablish the connection to the core network entity in the wireless communication network,
- wherein the processor is configured to determine, based on the third notification, to establish a second alternate communication path to the core network entity,
- wherein the second notification comprises updated route information for the first alternate communication path, and
- wherein in response to receiving the third notification, the transceiver is configured to receive, from the BS, data that the wireless communication device had transmitted to the BS but had not yet been forwarded to the parent BS of the BS.
A method for operating a base station (BS) in a wireless communication network, the method comprising:
- detecting occurrence of a radio link failure (RLF) on a backhaul link with a parent BS of the BS;
- transmitting, to a wireless communication device connected to the BS:
- a first notification indicating for the wireless communication device to hold data to be transmitted from the wireless communication device to the BS;
- in response to reestablishment of the connection to a core network entity, a second notification indicating for the wireless communication device to resume transmitting data via a first alternate communication path;
- in response to failing to reestablish the connection to the core network entity, a third notification indicating for the wireless communication device to establish a second alternate communication path to the core network entity;
- and
- in response to determining that the RLF is unrecoverable, data that had been received from the wireless communication device but not yet been forwarded to the parent BS of the BS,
- wherein the second notification comprises updated route information for the first alternate communication path.
Dependencies are inferred from the claim text.