# US 2018/0323883 A1 · Method and system of a wireless communication network for detecting neighbouring ues, of a first ue > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323883 A1 - Document ID: US20180323883A1 - Status: Published application - Kind: A1 - Application number: 15/772,347 - Filed: 2015-11-10 - Published: 2018-11-08 - Earliest claimed: 2015-11-10 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Gabor FODOR; Carlos F.M. SILVA - Web page: https://patentgrep.com/patent/US20180323883A1 ## CPC - H04B 17/318: Received signal strength - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 8/005: {Discovery of network devices, e.g. terminals} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04W 76/14: Direct-mode setup - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method is performed by a system of a wireless communication network, for detecting neighboring UEs of a first UE that is wirelessly connected to a first base station. The method comprises receiving power measurements performed on signals received at the first UE, which signals are sent from base stations, each received power measurement being associated with an ID of the base station from which the signal was sent, and receiving power measurements of signals received at a second UE that is wirelessly connected to a second base station, each power measurement being associated with an ID of the base station from which the signal was sent. The method further comprises determining a correlation between the received power measurements of the first and second UEs, and based on the determined correlation, determining whether the second UE is a neighbor to the first UE. ## Claims ### Claim 1 A method performed by a system of a wireless communication network, for detecting neighboring User Equipments, UEs, of a first UE that is wirelessly connected to a first base station of the network, the method comprising: receiving power measurements performed on signals received at the first UE, which signals are sent from base stations in the vicinity of the first UE, each received power measurement being associated with an ID of the base station from which the signal was sent, receiving power measurements of signals received at a second UE that is wirelessly connected to a second base station of the network, different from the first base station, which signals are sent from base stations in the vicinity of the second UE, each power measurement being associated with an ID of the base station from which the signal was sent, determining a correlation between the received power measurements of the first UE and the received power measurements of the second UE, based on the determined correlation, determining whether the second UE is a neighbor to the first UE. ### Claim 2 (depends on 1) Method according to claim 1, further comprising: determining a common group of base stations comprising the ones of the base stations in the vicinity of the first UE and the ones of the base stations in the vicinity of the second UE that are in the vicinity of both the first UE and the second UE, and wherein the determining of correlations is performed only for the common group of base stations. ### Claim 3 (depends on 2) Method according to claim 2, wherein the common group of base stations comprises base stations that are in both a neighboring cell list of the first base station and a neighboring cell list of the second base station. ### Claim 4 (depends on 2) Method according to claim 2, wherein the receiving of power measurements performed on signals received at the first UE and the receiving of power measurements performed on signals received at the second UE are performed only for the determined common group of base stations. ### Claim 5 (depends on 2) Method according to claim 2, wherein the common group of base stations are determined by establishing a base station neighborhood matrix B comprising, in one column each, a plurality of base stations that are in a neighboring cell list of the first base stations or in a neighboring cell list of the second base station, and, in one row each, the first and the second base station, in which in the first row, base stations of the plurality of base stations that are in the neighboring cell list of the first base station are marked, and in the second row, base stations of the plurality of base stations that are in the neighboring cell list of the second base station are marked, and determining the common group of base stations between the first and the second base station by detecting the columns where there is a mark in both the first and the second row. ### Claim 6 (depends on 2) Method according to claim 2, wherein the common group of base stations are determined by establishing a base station neighborhood matrix B comprising in one column each, the first base station, the second base station and a plurality of further base stations in the vicinity of the first or the second UE, and, in one row each, the first base station, the second base station and the plurality of further base stations in the vicinity of the first or the second UE, and for each row, marking the base stations that are in a neighboring cell list of that row's base station, and determining the common group of base stations between the first and the second base station by detecting the columns where there is a mark in both the first and the second row. ### Claim 7 (depends on 1) Method according to claim 1, further comprising: sorting the received measurements into power vectors, a first power vector for the first UE comprising the power measurements of the first UE in a base station order, and a second power vector for the second UE comprising the power measurements of the second UE in the base station order, and wherein the determining of correlation comprises comparing the measurements of the power vector of the first UE with the measurements of the power vector of the second UE. ### Claim 8 (depends on 7) Method according to claim 7, wherein the correlation is determined by a normalized scalar product between the power vector of the first UE and the power vector of the second UE. ### Claim 9 (depends on 1) Method according to claim 1, further comprising: comparing the determined correlation to a correlation threshold, and wherein it is determined that the second UE is a neighbor to the first UE when the correlation is above the correlation threshold. ### Claim 10 (depends on 1) Method according to claim 1, further comprising, when it is determined that the second UE is a neighbor to the first UE, triggering sending of information to the first UE that the second UE is a neighbor to the first UE. ### Claim 11 (depends on 1) Method according to claim 1, further comprising: when it is determined that the second UE is a neighbor to the first UE, triggering sending the determined correlation of the second UE to the first UE. ### Claim 12 A method performed by a first User Equipment, UE, wirelessly connected to a first base station of a wireless communication network, for detecting neighboring UEs of the first UE, the method comprising: sending to the first base station power measurements performed on signals received from base stations in the vicinity of the first UE, each power measurement being associated with an ID of the base station from which the signal was received; receiving, from the first base station information of one or more second UEs that is/are wirelessly connected to a different base station than the first base station, information indicating that the one or more second UEs has been determined to be a neighbor to the first UE based on correlations between the power measurements of the first UE and corresponding power measurements of individual of the one or more second UE, and sending a signal to at least one of the one or more second UE, based on the received information, for device to device communication with the at least one of the one or more second UE. ### Claim 13 (depends on 12) Method according to claim 12, wherein the information of the one or more second UEs indicates a priority order in which the first UE is to contact the one or more second UEs. ### Claim 14 (depends on 13) Method according to claim 13, wherein the information indicating a priority order is the correlations between the power measurements of the first UE and the corresponding power measurements of the individual of one or more second UE. ### Claim 15 A system operable in a wireless communication network configured for detecting neighboring UEs of a first UE that is wirelessly connected to a first base station of the network, the system comprising a processor and a memory said memory containing instructions executable by said processor, whereby the system is operative for: receiving power measurements performed on signals received at the first UE, which signals are sent from base stations in the vicinity of the first UE, each received power measurement being associated with an ID of the base station from which the signal was sent, receiving power measurements of signals received at a second UE that is wirelessly connected to a second base station of the network, different from the first base station, which signals are sent from base stations in the vicinity of the second UE, each power measurement being associated with an ID of the base station from which the signal was sent, determining a correlation between the received power measurements of the first UE and the received power measurements of the second UE, and based on the determined correlation, determining whether the second UE is a neighbor to the first UE. ### Claim 16 (depends on 15) System according to claim 15, further being operative for determining a common group of base stations comprising the ones of the base stations in the vicinity of the first UE and the ones of the base stations in the vicinity of the second UE that are in the vicinity of both the first UE and the second UE, and wherein the determining of correlations is performed only for the common group of base stations. ### Claim 17 (depends on 16) System according to claim 16, wherein the system is operative for the receiving of power measurements performed on signals received at the first UE and for the receiving of the power measurements performed on signals received at the second UE only for the determined common group of base stations. ### Claim 18 (depends on 16) System according to claim 16, wherein the system is operative for determining the common group of base stations by establishing a base station neighborhood matrix B comprising, in one column each, a plurality of base stations that are in a neighboring cell list of the first base stations or in a neighboring cell list of the second base station, and, in one row each, the first and the second base station, in which in the first row, base stations of the plurality of base stations that are in the neighboring cell list of the first base station are marked, and in the second row, base stations of the plurality of base stations that are in the neighboring cell list of the second base station are marked, and determining the common group of base stations between the first and the second base station by detecting the columns where there is a mark in both the first and the second row. ### Claim 19 (depends on 16) System according to claim 16, wherein the system is operative for determining the common group of base stations by establishing a base station neighborhood matrix B comprising in one column each, the first base station, the second base station and a plurality of further base stations in the vicinity of the first or the second UE, and, in one row each, the first base station, the second base station and the plurality of further base stations in the vicinity of the first or the second UE, and for each row, marking the base stations that are in a neighboring cell list of that row's base station, and determining the common group of base stations between the first and the second base station by detecting the columns where there is a mark in both the first and the second row. ### Claim 20 (depends on 15) System according to claim 15, further being operative for sorting the received measurements into power vectors, a first power vector for the first UE comprising the power measurements of the first UE in a base station order, and a second power vector for the second UE comprising the power measurements of the second UE in the base station order, and wherein the system being operative for determining of correlation comprises the system being operative for comparing the measurements of the power vector of the first UE with the measurements of the power vector of the second UE. ### Claim 21 (depends on 20) System according to claim 20, wherein the system is operative for determining the correlation by a normalized scalar product between the power vector of the first UE and the power vector of the second UE. ### Claim 22 (depends on 15) System according to claim 15, further being operative for comparing the determined correlation to a correlation threshold, and wherein the system is operative for determining that the second UE is a neighbor to the first UE when the correlation is above the correlation threshold. ### Claim 23 (depends on 15) System according to claim 15, further being operative for, when it has been determined that the second UE is a neighbor to the first UE, triggering sending of information to the first UE that the second UE is a neighbor to the first UE. ### Claim 24 (depends on 15) System according to claim 15, further being operative for, when it has been determined that the second UE is a neighbor to the first UE, triggering sending the determined correlation of the second UE to the first UE. ### Claim 25 A first user equipment, UE, configured to be wirelessly connected to a first base station of a wireless communication network, the first UE being operable for detecting neighboring UEs of the first UE, the first UE comprising a processor and a memory, said memory containing instructions executable by said processor, whereby the first UE is operative for: sending to the first base station power measurements performed on signals received from base stations in the vicinity of the first UE, each power measurement being associated with an ID of the base station from which the signal was received; receiving, from the first base station information of one or more second UEs that is/are wirelessly connected to a different base station than the first base station, information indicating that the one or more second UEs has been determined to be a neighbor to the first UE based on correlations between the power measurements of the first UE and corresponding power measurements of individual of the one or more second UE, and sending a signal to at least one of the one or more second UE, based on the received information, for device to device communication with the at least one of the one or more second UE. ### Claim 26 (depends on 25) First UE according to claim 25, wherein the information of the one or more second UEs indicates a priority order in which the first UE is to contact the one or more second UEs. ### Claim 27 A computer program comprising computer readable code means to be run in a system of a wireless communication network, configured for detecting neighboring UEs of a first UE that is wirelessly connected to a first base station of the network, which computer readable code means when run in the system causes the system to perform the following steps: receiving power measurements performed on signals received at the first UE, which signals are sent from base stations in the vicinity of the first UE, each received power measurement being associated with an ID of the base station from which the signal was sent, receiving power measurements of signals received at a second UE that is wirelessly connected to a second base station of the network, different from the first base station, which signals are sent from base stations in the vicinity of the second UE, each power measurement being associated with an ID of the base station from which the signal was sent, determining a correlation between the received power measurements of the first UE and the received power measurements of the second UE, and based on the determined correlation, determining whether the second UE is a neighbor to the first UE. ### Claim at position 28 28-29. (canceled) ### Claim 30 A computer program comprising computer readable code means to be run in a first UE configured to be wirelessly connected to a first base station of a wireless communication network, the first UE being operable for detecting neighboring UEs of the first UE, which computer readable code means when run in the first UE causes the first UE to perform the following steps: sending to the first base station power measurements performed on signals received from base stations in the vicinity of the first UE, each power measurement being associated with an ID of the base station from which the signal was received; receiving, from the first base station information of one or more second UEs that is/are wirelessly connected to a different base station than the first base station, information indicating that the one or more second UEs has been determined to be a neighbor to the first UE based on correlations between the power measurements of the first UE and corresponding power measurements of individual of the one or more second UE, and sending a signal to at least one of the one or more second UE, based on the received information, for device to device communication with the at least one of the one or more second UE. ### Claim at position 30 31-32. (canceled)