# US 10,321,363 B2 · Radio network nodes and methods for enabling mobility between said nodes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,363 B2 - Document ID: US10321363B2 - Status: Granted - Kind: B2 - Application number: 15/527,092 - Filed: 2015-09-02 - Published: 2017-12-21 - Granted: 2019-06-11 - Earliest claimed: 2015-09-02 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Andreas Bergström; Pradeepa Ramachandra; Peter Alriksson - Web page: https://patentgrep.com/patent/US10321363B2 ## CPC - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04B 7/0619: {using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001)} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports} - H04W 16/28: using beam steering - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Embodiments herein relate to a method performed by a first radio network node for enabling a mobility procedure of a wireless device between the first radio network node and a second radio network node in a wireless communication network. The first radio network node transmits a first indication to the second radio network node, which first indication indicates a position of the wireless device. The first radio network node further receives a second indication from the second radio network node, which second indication indicates one or more beams used at the second radio network node. The first radio network node sends to the wireless device measurement information indicating the one or more beams to perform measurement on and thereby enabling the mobility procedure. ## Claims ### Claim 1 A method performed by a first radio network node for enabling a mobility procedure of a wireless device between the first radio network node and a second radio network node in a wireless communication network; comprising: transmitting a first indication to the second radio network node, which first indication indicates a position of the wireless device; receiving a second indication from the second radio network node, which second indication indicates one or more beams used at the second radio network node; sending to the wireless device measurement information indicating the one or more beams to perform measurement on and thereby enabling the mobility procedure; receiving a measurement report from the wireless device; using the measurement report in the mobility procedure; and building and/or maintaining a table indicating a mapping of position to beams based on the received measurement report and/or the second indication. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: determining the position of the wireless device. ### Claim 3 (depends on 1) The method according to claim 1, further comprising: determining one or more neighbouring radio network nodes comprising the second radio network node to be relevant for the position of the wireless device. ### Claim 4 (depends on 3) The method according to claim 3, wherein the determining the one or more neighbouring radio network nodes is determined taking the table indicating the mapping of position to beams into account. ### Claim 5 (depends on 1) The method according to claim 1, wherein the transmitting of the first indication further comprises transmitting a beam indication indicating one or more suggested beams according to the table indicating the mapping of position to beams. ### Claim 6 (depends on 1) The method according to claim 1, wherein the receiving of the second indication further comprises receiving a further indication indicating which beams to keep and/or flush at the table indicating the mapping of position to beams at the first radio network node. ### Claim 7 A method performed by a second radio network node for enabling a mobility procedure of a wireless device between a first radio network node and the second radio network node in a wireless communication network; comprising: receiving a first indication from the first radio network node, which first indication indicates a position of the wireless device; determining one or more beams to use based on the indicated position of the wireless device and taking into account a table indicating a mapping of position to beams; and transmitting a second indication to the first radio network node, which second indication indicates the determined one or more beams. ### Claim 8 (depends on 7) The method according to claim 7, further comprising: initiating transmission of the one or more beams. ### Claim 9 (depends on 7) The method according to claim 7, wherein the receiving of the first indication comprises to receive a beam indication indicating one or more suggested beams and this beam indication is taken into account when determining the one or more beams. ### Claim 10 (depends on 7) The method according to claim 7, further comprising: building and/or maintaining the table indicating the mapping of position to beams based on the received beam indication and/or the determining of the one or more beams to use. ### Claim 11 (depends on 7) The method according to claim 7, wherein the determining the one or more beams to use is determined taking whether a beam is active or not into account. ### Claim 12 (depends on 7) The method according to claim 7, wherein the determining the one or more beams to use further takes interference and/or signal strength of different beams into account. ### Claim 13 (depends on 7) The method according to claim 7, wherein the transmitting of the second indication further comprises transmitting a further indication indicating which beams to keep and/or flush at the table indicating the mapping of position to beams at the first radio network node. ### Claim 14 A first radio network node for enabling a mobility procedure of a wireless device between the first radio network node and a second radio network node in a wireless communication network; the first radio network node being configured to: transmit a first indication to the second radio network node, which first indication indicates a position of the wireless device; receive a second indication from the second radio network node, which second indication indicates one or more beams used at the second radio network node; send to the wireless device measurement information indicating the one or more beams to perform measurement on and thereby enabling the mobility procedure; receive a measurement report from the wireless device; use the measurement report in the mobility procedure; and build and/or maintain a table indicating a mapping of position to beams based on the received measurement report and/or the second indication to the wireless device. ### Claim 15 (depends on 14) The first radio network node according to claim 14, further being configured to: determine the position of the wireless device. ### Claim 16 (depends on 14) The first radio network node according to claim 14, further being configured to: determine one or more neighbouring radio network nodes comprising the second radio network node to be relevant for the position of the wireless device. ### Claim 17 (depends on 16) The first radio network node according to claim 16, being configured to determine the one or more neighbouring radio network nodes to be relevant for the position of the wireless device by taking the table indicating the mapping of position to beams into account. ### Claim 18 (depends on 14) The first radio network node according to claim 14, being configured to transmit the first indication and also to transmit a beam indication indicating one or more suggested beams according to the table indicating the mapping of position to beams. ### Claim 19 (depends on 14) The first radio network node according to claim 14, being configured to receive the second indication and also to receive a further indication indicating which beams to keep and/or flush at the table indicating the mapping of position to beams at the first radio network node. ### Claim 20 A second radio network node for enabling a mobility procedure of a wireless device between a first radio network node and the second radio network node in a wireless communication network; the second radio network node being configured to: receive a first indication from the first radio network node, which first indication indicates a position of the wireless device; determine one or more beams to use based on the indicated position of the wireless device and taking into account a table indicating a mapping of position to beams; and transmit a second indication to the first radio network node, which second indication indicates the determined one or more beams. ### Claim 21 (depends on 20) The second radio network node according to claim 20, further being configured to initiate transmission of the one or more beams. ### Claim 22 (depends on 20) The second radio network node according to claim 20, being configured to receive the first indication and also to receive a beam indication indicating one or more suggested beams and further being configured to determine the one or more beams by taking this beam indication into account. ### Claim 23 (depends on 20) The second radio network node according to claim 20, being configured to build and/or maintain the table indicating the mapping of position to beams based on the received beam indication and/or the determining of the one or more beams to use. ### Claim 24 (depends on 20) The second radio network node according to claim 20, being configured to determine the one or more beams to use by taking whether a beam is active or not into account. ### Claim 25 (depends on 20) The second radio network node according to claim 20, being configured to determine the one or more beams to use by taking interference and/or signal strength of different beams into account. ### Claim 26 (depends on 20) The second radio network node according to claim 20, being configured to transmit the second indication and to transmit a further indication indicating which beams to keep and/or flush at the table indicating the mapping of position to beams at the first radio network node.