# US 2019/0357291 A1 · Failure Detection and Recovery for Multiple Active Resources > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357291 A1 - Document ID: US20190357291A1 - Status: Published application - Kind: A1 - Application number: 16/418,699 - Filed: 2019-05-21 - Published: 2019-11-21 - Earliest claimed: 2018-05-21 - Assignees: Comcast Cable Communications, LLC - Applicants: Comcast Cable Communications, LLC - Inventors: Hua Zhou; Esmael Dinan; Ali Cirik; Alireza Babaei; Hyoungsuk Jeon; Kyungmin Park - Web page: https://patentgrep.com/patent/US20190357291A1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 76/19: Connection re-establishment - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 28/18: Negotiating wireless communication parameters - H04W 76/15: Setup of multiple wireless link connections - Y02D 30/70: in wireless communication networks - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Wireless communications using multiple active resources (e.g., bandwidth parts (BWPs)) are described. A wireless device may perform failure event detection, such as radio link monitoring (RLM) and/or beam failure detection (BFD), jointly or separately for multiple active resources (e.g., BWPs) based on one or more criteria. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, configuration parameters of a cell, wherein the cell comprises a first bandwidth part (BWP) and a second BWP; activating the first BWP and the second BWP; determining, based on a first downlink control channel configuration of the first BWP and a second downlink control channel configuration of the second BWP, a BWP, of the first BWP and the second BWP, for radio link monitoring for the cell; measuring, during a time period that the first BWP and the second BWP are active, one or more reference signals associated with the determined BWP; determining, based on the measuring, a radio link failure for the cell; and initiating, based on the radio link failure for the cell, a connection re-establishment procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein the determining the BWP for the radio link monitoring for the cell is further based on: a first radio interface type on the first BWP; and a second radio interface type on the second BWP. ### Claim 3 (depends on 1) The method of claim 1, wherein the first downlink control channel configuration of the first BWP and the second downlink control channel configuration of the second BWP comprises at least one of: a first BWP index of the first BWP and a second BWP index of the second BWP; a first numerology index of the first BWP and a second numerology index of the second BWP; a first service type on the first BWP and a second service type on the second BWP; or a radio link monitoring reference signal configuration. ### Claim 4 (depends on 1) The method of claim 1, wherein the initiating the connection re-establishment procedure comprises sending a preamble associated with a random access procedure. ### Claim 5 (depends on 1) The method of claim 1, wherein the one or more reference signals associated with the determined BWP comprise at least one of: a synchronization signal block; or a channel state information reference signal. ### Claim 6 (depends on 1) The method of claim 1, wherein the configuration parameters indicate at least one of: a first reference signal associated with the first BWP; and a second reference signal associated with the second BWP. ### Claim 7 (depends on 1) The method of claim 1, wherein the cell comprises at least one of: a primary cell; or a primary secondary cell. ### Claim 8 (depends on 1) The method of claim 1, wherein the determining the BWP for radio link monitoring for the cell is further based on at least one of: the determined BWP being configured with downlink control channel resources; the determined BWP being configured with a common search space set for downlink channel monitoring; or the determined BWP being configured with reference signals for radio link monitoring. ### Claim 9 (depends on 1) The method of claim 1, further comprising: monitoring, based on the activating the first BWP, a first downlink control channel on the first BWP for first downlink control information indicating resource allocation of the first BWP; and monitoring, based on the activating the second BWP, a second downlink control channel on the second BWP for second downlink control information indicating resource allocation of the second BWP. ### Claim 10 (depends on 1) The method of claim 1, further comprising determining whether a radio link quality of the cell for a time period satisfies: a first threshold associated with a first block error rate; and a second threshold associated with a second block error rate. ### Claim 11 (depends on 1) The method of claim 1, further comprising: determining at least one of: at least one first indication, based on a radio link quality not satisfying a first threshold; or at least one second indication, based on the radio link quality satisfying a second threshold; and determining at least one of: a radio link failure event has occurred, based on a first quantity of the at least one first indications; or a radio link failure event has not occurred, based on a second quantity of the at least one second indications. ### Claim 12 A method comprising: receiving, by a wireless device, configuration parameters for a first bandwidth part (BWP) of a cell and for a second BWP of the cell; activating the first BWP and the second BWP; determining, based on a first radio interface type associated with the first BWP and a second radio interface type associated with the second BWP, a BWP, of the first BWP and the second BWP, for radio link monitoring for the cell; measuring, during a time period that the first BWP and the second BWP are active, one or more reference signals associated with the determined BWP; determining, based on the measuring, a radio link failure for the cell; and sending, based on the radio link failure for the cell, a preamble associated with a random access procedure. ### Claim 13 (depends on 12) The method of claim 12, wherein the first radio interface type associated with the first BWP comprises at least one of: an Uu radio interface between a base station and the wireless device; and a sidelink radio interface between the wireless device and a second wireless device. ### Claim 14 (depends on 13) The method of claim 13, wherein the second radio interface type associated with the second BWP comprises at least one of: an Uu radio interface between a base station and the wireless device; and a sidelink radio interface between the wireless device and a second wireless device. ### Claim 15 (depends on 12) The method of claim 12, wherein the determining the BWP for the radio link monitoring for the cell is further based on the BWP comprising a Uu radio interface type. ### Claim 16 (depends on 12) The method of claim 12, wherein the activating the first BWP and the second BWP comprises: activating the first BWP at a first time interval; and activating the second BWP at a second time interval that at least partially overlaps with the first time interval. ### Claim 17 A method comprising: receiving, by a wireless device, configuration parameters for a first bandwidth part (BWP) of a cell and for a second BWP of the cell; activating the first BWP and the second BWP; determining, based on one or more criteria, a BWP for radio link monitoring for the cell, wherein the one or more criteria comprises at least one of: a first BWP index of the first BWP and a second BWP index of the second BWP; a first numerology index of the first BWP and a second numerology index of the second BWP; a first service type on the first BWP and a second service type on the second BWP; or a radio link monitoring reference signal configuration; measuring, during a time period that the first BWP and the second BWP are active, one or more reference signals associated with the determined BWP; determining, based on the measuring, a radio link failure for the cell; and sending, based on the radio link failure for the cell, a preamble associated with a random access procedure. ### Claim 18 (depends on 17) The method of claim 17, wherein the determining is further based on at least one of: the determined BWP being configured with downlink control channel resources; the determined BWP being configured with a common search space set for downlink channel monitoring; or the determined BWP being configured with reference signals for radio link monitoring. ### Claim 19 (depends on 17) The method of claim 17, wherein the determined BWP is configured with at least one of: downlink control channel resources; or a common search space for downlink control channel monitoring. ### Claim 20 (depends on 17) The method of claim 17, wherein the configuration parameters indicate at least one of: a first reference signal associated with the first BWP; and a second reference signal associated with the second BWP.