# US 2013/0155847 A1 · Methods and apparatus to enhance reliability in millimeter wave wideband communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155847 A1 - Document ID: US20130155847A1 - Status: Published application - Kind: A1 - Application number: 13/712,393 - Filed: 2012-12-12 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Ying Li; Zhouyue Pi; Farooq Khan - Web page: https://patentgrep.com/patent/US20130155847A1 ## CPC - H04W 24/04: Arrangements for maintaining operational condition - H04L 1/20: using signal quality detector - H04W 76/10: Connection setup - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A network node in a wireless network performs a method for enhancing reliability in wireless communication. The method includes determining, at a first network node, that a current link with a second network node is broken. The method also includes attempting, at the first network node, to recover the current link. The method further includes, upon a determination that the current link is not recoverable, establishing, at the first network node, a new link with the second network node according to one of a plurality of switching rules, the switching rules ordered according to a priority among the switching rules. ## Claims ### Claim 1 For use by a network node in a wireless network, a method for enhancing reliability in wireless communication, the method comprising: determining, at a first network node, that a current link with a second network node is broken; attempting, at the first network node, to recover the current link; and upon a determination that the current link is not recoverable, establishing, at the first network node, a new link with the second network node according to one of a plurality of switching rules, the switching rules ordered according to a priority among the switching rules. ### Claim 2 (depends on 1) The method of claim 1, wherein the switching rules comprise: (i) switching to another beam in a same control channel as a beam associated with the current link, (ii) switching to one or more beams in another control channel, (iii) switching to a cell that is at a same cell site as a current cell, (iv) switching to a cell at another cell site with a wired backhaul link, or (v) switching to a cell at another cell site with a wireless backhaul, wherein rules (i) through (v) are ordered from a highest priority to a lowest priority. ### Claim 3 (depends on 1) The method of claim 1, wherein each of the current link and the new link comprise at least one of a beam associated with a synchronization channel, a beam associated with a broadcast channel, a beam associated with a data control channel, and a data beam. ### Claim 4 (depends on 1) The method of claim 1, wherein the wireless network is a millimeter wave wideband communication network. ### Claim 5 (depends on 1) The method of claim 1, further comprising: monitoring a plurality of candidate beams between the first network node and the second network node for switching, and prioritizing each candidate beam based on whether the candidate beam is (i) a beam in a same control channel as a beam associated with the current link, (ii) a beam in another control channel, (iii) a beam in another cell that is at a same cell site as a current cell, (iv) a beam in a cell at another cell site with a wired backhaul link, or (v) a beam in a cell at another cell site with a wireless backhaul. ### Claim 6 (depends on 1) The method of claim 1, further comprising: transmitting at least one first control beam including reference signals on which the second network node can perform a measurement. ### Claim 7 (depends on 1) The method of claim 1, further comprising: receiving a measurement report from the second network node; and based on the measurement report, selecting a new beam, wherein the measurement report comprises at least one of: a best pair of transmit beam and receive beam, a plurality of good pairs of transmit beam and receive beam, and a signal strength. ### Claim 8 (depends on 1) The method of claim 1, wherein the first network node is a mobile station and the second network node is a base station. ### Claim 9 (depends on 1) The method of claim 1, wherein the first network node is a first base station and the second network node is a second base station. ### Claim 10 A base station configured to enhance reliability in a wireless network, the base station comprising: a processor configured to: determine that a current link with a network node is broken; attempt to recover the current link; and upon a determination that the current link is not recoverable, establish a new link with the network node according to one of a plurality of switching rules, the switching rules ordered according to a priority among the switching rules. ### Claim 11 (depends on 10) The base station of claim 10, wherein the switching rules comprise: (i) switching to another beam in a same control channel as a beam associated with the current link, (ii) switching to one or more beams in another control channel, (iii) switching to a cell that is at a same cell site as a current cell, (iv) switching to a cell at another cell site with a wired backhaul link, or (v) switching to a cell at another cell site with a wireless backhaul, wherein rules (i) through (v) are ordered from a highest priority to a lowest priority. ### Claim 12 (depends on 10) The base station of claim 10, wherein each of the current link and the new link comprise at least one of a beam associated with a synchronization channel, a beam associated with a broadcast channel, a beam associated with a data control channel, and a data beam. ### Claim 13 (depends on 10) The base station of claim 10, wherein the wireless network is a millimeter wave wideband communication network. ### Claim 14 (depends on 10) The base station of claim 10, the processor further configured to: monitor a plurality of candidate beams between the base station and the network node for switching, and prioritizing each candidate beam based on whether the candidate beam is (i) a beam in a same control channel as a beam associated with the current link, (ii) a beam in another control channel, (iii) a beam in another cell that is at a same cell site as a current cell, (iv) a beam in a cell at another cell site with a wired backhaul link, or (v) a beam in a cell at another cell site with a wireless backhaul. ### Claim 15 (depends on 10) The base station of claim 10, the processor further configured to: transmit at least one first control beam including reference signals on which the network node can perform a measurement. ### Claim 16 (depends on 10) The base station of claim 10, the processor further configured to: receive a measurement report from the network node; and based on the measurement report, select a new beam, wherein the measurement report comprises at least one of: a best pair of transmit beam and receive beam, a plurality of good pairs of transmit beam and receive beam, and a signal strength. ### Claim 17 (depends on 10) The base station of claim 10, wherein the network node is a mobile station or a second base station. ### Claim 18 A mobile station configured to enhance reliability in a wireless network, the mobile station comprising: a processor configured to: determine that a current link with a base station is broken; attempt to recover the current link; and upon a determination that the current link is not recoverable, establish a new link with the base station according to one of a plurality of switching rules, the switching rules ordered according to a priority among the switching rules. ### Claim 19 (depends on 18) The mobile station of claim 18, wherein the switching rules comprise: (i) switching to another beam in a same control channel as a beam associated with the current link, (ii) switching to one or more beams in another control channel, (iii) switching to a cell that is at a same cell site as a current cell, (iv) switching to a cell at another cell site with a wired backhaul link, or (v) switching to a cell at another cell site with a wireless backhaul, wherein rules (i) through (v) are ordered from a highest priority to a lowest priority. ### Claim 20 (depends on 18) The mobile station of claim 18, wherein each of the current link and the new link comprise at least one of a beam associated with a synchronization channel, a beam associated with a broadcast channel, a beam associated with a data control channel, and a data beam. ### Claim 21 (depends on 18) The mobile station of claim 18, wherein the wireless network is a millimeter wave wideband communication network. ### Claim 22 (depends on 18) The mobile station of claim 18, the processor further configured to: monitor a plurality of candidate beams between the mobile station and the base station for switching, and prioritizing each candidate beam based on whether the candidate beam is (i) a beam in a same control channel as a beam associated with the current link, (ii) a beam in another control channel, (iii) a beam in another cell that is at a same cell site as a current cell, (iv) a beam in a cell at another cell site with a wired backhaul link, or (v) a beam in a cell at another cell site with a wireless backhaul. ### Claim 23 (depends on 18) The mobile station of claim 18, the processor further configured to: send a measurement report to the base station, wherein the measurement report is used by the base station to select a new beam, wherein the measurement report comprises at least one of: a best pair of transmit beam and receive beam, a plurality of good pairs of transmit beam and receive beam, and a signal strength.