# US 10,375,586 B2 · System and method for monitoring wireless communication terminals on multiple frequency channels > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,586 B2 - Document ID: US10375586B2 - Status: Granted - Kind: B2 - Application number: 15/715,833 - Filed: 2017-09-26 - Published: 2018-03-22 - Granted: 2019-08-06 - Earliest claimed: 2015-04-28 - Assignees: Verint Systems Ltd. - Applicants: Verint Systems Ltd. - Inventors: Doron Breiter; Victor Cristian Ciochina; Constantin Tanasa - Web page: https://patentgrep.com/patent/US10375586B2 ## CPC - H04W 24/02: Arrangements for optimising operational condition - H04L 5/0005: {Time-frequency} - H04L 5/0046: {Determination of the number of bits transmitted on different sub-channels} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 5/0087: {when data requirements change} - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - H04W 24/06: Testing, {supervising or monitoring} using simulated traffic - 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 method includes mapping communication activity of wireless communication terminals on a plurality of frequency channels. A schedule of time durations to be spent on the respective frequency channels is defined based on the mapped communication activity. One or more transceivers are controlled to alternate among the frequency channels in accordance with the schedule. On each frequency channel, one or more of the wireless communication terminals are tracked by soliciting the wireless communication terminals to temporarily communicate with at least one of the transceivers during the respective time duration. ## Claims ### Claim 1 A method for monitoring wireless communication terminals, the method comprising: mapping communication activity of wireless communication terminals on a plurality of frequency channels, wherein the mapping comprises monitoring first-time interceptions of wireless communication terminals on a given frequency channel; measuring a rate of the first-time interceptions, to measure a length of time after which the rate of the first-time interceptions drops below a predetermined threshold; defining, based on the mapped communication activity, a schedule comprising time durations to be spent on the respective frequency channels, wherein the time duration to be spent on the given frequency channel is based on the measured length of time, wherein the schedule further comprises transmission parameters to be used by transceivers on the respective frequency channels; monitoring the communication activity of the wireless communication terminals according to the schedule by configuring the transceivers to transmit signals that imitate base stations in order to solicit the wireless communication terminals to communicate with the transceivers, wherein the transmitted signals from the transceivers imitate signals from base stations having a higher priority than other base stations in the area of the wireless communication terminal; and repeating the monitoring for multiple iterations of the schedule. ### Claim 2 (depends on 1) The method according to claim 1, wherein the monitoring the wireless communication terminals according to the schedule comprises: tuning transceivers in a bank of transceivers to different frequency channels in accordance with the schedule. ### Claim 3 (depends on 2) The method according to claim 2, wherein transceivers in the bank of transceivers monitor the different frequency channels simultaneously. ### Claim 4 (depends on 1) The method according to claim 1, wherein the transmitted signals are at a power level that is higher than used by other base stations in the area of the wireless communication terminal. ### Claim 5 (depends on 1) The method according to claim 1, wherein the plurality of frequency channels comprises frequency channels in different frequency bands. ### Claim 6 (depends on 1) The method according to claim 1, wherein the plurality of frequency channels comprises frequency channels used by different wireless networks. ### Claim 7 (depends on 1) The method according to claim 1, wherein monitoring the communication activity of the wireless communication terminals according to the schedule comprises: extracting an international mobile subscriber identity (IMSI), a temporary mobile subscriber identity (TMSI), or an international mobile equipment identity from each monitored wireless communication terminal. ### Claim 8 (depends on 1) The method according to claim 1, wherein the monitoring the communication activity of the wireless communication terminals according to the schedule comprises: extracting content and a time stamp from each monitored wireless communication terminal. ### Claim 9 (depends on 1) The method according to claim 1, wherein the time duration to be spent on the given frequency channel is also based on the number of different base stations with which the wireless communication terminals communicate with on the given frequency channel. ### Claim 10 (depends on 1) The method according to claim 1, further comprising: updating the schedule over iterations of the schedule based on the monitored communication activity of the wireless communication terminals. ### Claim 11 (depends on 10) The method according to claim 10, wherein updating the schedule comprises: specifying different transmission parameters for one or more subsequent iterations of the schedule. ### Claim 12 (depends on 10) The method according to claim 10, wherein the updating the schedule comprises: omitting a frequency channel from one or more subsequent iterations of the schedule. ### Claim 13 A monitoring system for monitoring wireless communication terminals, the monitoring system comprising: a bank of transceivers, wherein each transceiver in the bank of transceivers is tunable to a plurality of frequency channels; and a processor that is communicatively coupled to each transceiver in the bank of transceivers and a memory containing software that when executed by the processor cause the monitoring system to: map communication activity of wireless communication terminals on the plurality of frequency channels, wherein the mapping comprises monitoring first-time interceptions of wireless communication terminals on a given frequency channel, measure a rate of the first-time interceptions, to measure a length of time after which the rate of the first-time interceptions drops below a predetermined threshold, define, based on the mapped communication activity, a schedule comprising time durations to be spent on the respective frequency channels, wherein the time duration to be spent on the given frequency channel is based on the measured length of time, and wherein the time duration to be spent on the given frequency channel is also based on a number of different base stations with which the wireless communication terminals communicate on the given frequency channel; monitor the communication activity of the wireless communication terminals according to the schedule, and repeat the monitoring for multiple iterations of the schedule. ### Claim 14 (depends on 13) The monitoring system according to claim 13, wherein to monitor the communication activity of the wireless communication terminals according to the schedule, the transceivers in the bank of transceivers are tuned to different frequency channels in accordance with the schedule. ### Claim 15 (depends on 14) The monitoring system according to claim 14, wherein the transceivers in the bank of transceivers monitor the different frequency channels simultaneously. ### Claim 16 (depends on 13) The monitoring system according to claim 13, wherein the number of frequency channels in the plurality of frequency channels exceeds the number of transceivers in the bank of transceivers. ### Claim 17 A method for monitoring wireless communication terminals, the method comprising: mapping communication activity of wireless communication terminals on a plurality of frequency channels, wherein the mapping comprises monitoring first-time interceptions of wireless communication terminals on a given frequency channel; measuring a rate of the first-time interceptions, to measure a length of time after which the rate of the first-time interceptions drops below a predetermined threshold; defining, based on the mapped communication activity, a schedule comprising time durations to be spent on the respective frequency channels, wherein the time duration to be spent on the given frequency channel is based on the measured length of time and on the number of different base stations with which the wireless communication terminals communicate on the given frequency channel; monitoring the communication activity of the wireless communication terminals according to the schedule; and repeating the monitoring for multiple iterations of the schedule.