# US 10,873,951 B1 · Method and device to minimize interference in a converged LMR/LTE communication device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,951 B1 - Document ID: US10873951B1 - Status: Granted - Kind: B1 - Application number: 16/430,999 - Filed: 2019-06-04 - Published: 2020-12-10 - Granted: 2020-12-22 - Earliest claimed: 2019-06-04 - Assignees: Motorola Solutions, Inc. - Applicants: Motorola Solutions, Inc - Inventors: Bradley M Hiben; Bruce D Mueller; John B Preston - Web page: https://patentgrep.com/patent/US10873951B1 ## CPC - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04W 72/541: using the level of interference - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04L 1/0002: {by adapting the transmission rate} - H04W 28/0257: {the individual bearer or channel having a maximum bit rate or a bit rate guarantee} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/543: based on requested quality, e.g. QoS - H04W 76/30: Connection release - H04W 72/1215: {for collaboration of different radio technologies} - Y02D 30/50: in wire-line communication networks, e.g. low power modes or reduced link rate - H04B: TRANSMISSION - 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) - 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 A method and converged LMR/LTE communications device provide for minimizing interference in the converged LMR/LTE communications device that operates in a land mobile radio (LMR) narrowband communication system and a long term evolution (LTE) broadband communication system. The converged LMR/LTE communications device detects, using an electronic processing device, that the converged LMR/LTE communications device is operating in the first LTE band and the first LMR band. The converged LMR/LTE communications device determines that a first LMR received signal strength indicator (RSSI) at the converged LMR/LTE communications device is less than a first LMR threshold signal strength and disables at least one LTE application based upon the first LMR RSSI being less than the LMR threshold signal strength. ## Claims ### Claim 1 A method for minimizing interference in a converged LMR/LTE communications device that operates in a land mobile radio (LMR) narrowband communication system and a long term evolution (LTE) broadband communication system, the method comprising: determining a first LMR received signal strength indicator (RSSI) at the converged LMR/LTE communications device; determining a first LTE Reference Symbol Receive Power (RSRP) at the converged LMR/LTE communications device; determining whether an intersection of the first LMR RSSI and the first LTE RSRP falls within an interference range on a predetermined graph, the predetermined graph based upon an LMR frequency band and an LTE frequency band that the converged LMR/LTE communications device is currently utilizing; and decreasing bit rate for LTE transmissions for the converged LMR/LTE communications device responsive to determining that the intersection of the first LMR RSSI and the first LTE RSRP is within the interference range. ### Claim 2 (depends on 1) The method of claim 1, wherein the step of decreasing comprises setting a capped bit rate for LTE transmissions for the converged LMR/LTE communications device. ### Claim 3 (depends on 2) The method of claim 2, wherein the capped bit rate is decreased to a predetermined bit rate, the predetermined bit rate limiting LTE uplink transmitted signal interference. ### Claim 4 (depends on 2) The method of claim 2, the method further comprising the step of utilizing the capped bit rate to limit the bit rate. ### Claim 5 (depends on 4) The method of claim 4, wherein the bit rate comprises a predetermined percentage of the capped bit rate. ### Claim 6 (depends on 1) The method of claim 1, wherein the step of decreasing comprises disabling an LTE application on the converged LMR/LTE communications device. ### Claim 7 (depends on 6) The method of claim 6, wherein the step of disabling an LTE application on the converged LMR/LTE communications device comprises disabling the LTE application using a destination IP address of the LTE application. ### Claim 8 (depends on 6) The method of claim 6, wherein the step of disabling an LTE application on the converged LMR/LTE communications device comprises instructing the LTE application to stop producing LTE traffic for a first period of time. ### Claim 9 (depends on 1) The method of claim 1, wherein the LMR frequency band comprises the 700 MHz band and wherein the LTE frequency band is band 14. ### Claim 10 (depends on 1) The method of claim 1, wherein the LMR frequency band comprises the 700 MHz band and wherein the LTE frequency band is band 13. ### Claim 11 (depends on 1) The method of claim 1, wherein the LMR frequency band comprises the 800 MHz band and wherein the LTE frequency band is band 5. ### Claim 12 (depends on 1) The method of claim 1, wherein the LTE frequency band comprises one of Band 5, Band 13, or Band 14. ### Claim 13 (depends on 12) The method of claim 12, the method further comprising the step of detecting that the converged LMR/LTE communications device has transitioned to a band other than one of Band 5, Band 13, or Band 14. ### Claim 14 (depends on 13) The method of claim 13, the method further comprising the step of increasing the bit rate for LTE transmissions for the converged LMR/LTE communications device. ### Claim 15 (depends on 1) The method of claim 1, wherein the LTE transmissions comprise location update data and non-location data, and wherein the step of decreasing the bit rate for LTE transmissions comprises decreasing the bit rate for the non-location data. ### Claim 16 A converged LMR/LTE communications device for minimizing interference when operating in a land mobile radio (LMR) narrowband communication system and a long term evolution (LTE) broadband communication system, the converged LMR/LTE communications device comprising: a processor that performs: determining a first LMR received signal strength indicator (RSSI) at the converged LMR/LTE communications device; determining a first LTE Reference Symbol Receive Power (RSRP) at the converged LMR/LTE communications device; determining whether an intersection of the first LMR RSSI and the first LTE RSRP falls within an interference range on a predetermined graph, the predetermined graph based upon an LMR frequency band and an LTE frequency band that the converged LMR/LTE communications device is currently utilizing; and decreasing bit rate for LTE transmissions for the converged LMR/LTE communications device responsive to determining that the intersection of the first LMR RSSI and the first LTE RSRP is within the interference range. ### Claim 17 (depends on 16) The converged LMR/LTE communications device of claim 16, wherein the step of decreasing comprises setting a capped bit rate for LTE transmissions for the converged LMR/LTE communications device. ### Claim 18 (depends on 17) The converged LMR/LTE communications device of claim 17, wherein the processor is further configured to utilize the capped bit rate to limit the bit rate, and wherein the bit rate comprises a predetermined percentage of the capped bit rate. ### Claim 19 (depends on 16) The converged LMR/LTE communications device of claim 16, wherein the step of decreasing comprises disabling an LTE application on the converged LMR/LTE communications device. ### Claim 20 (depends on 16) The converged LMR/LTE communications device of claim 16, wherein the LTE transmissions comprise location update data and non-location data, and wherein the step of decreasing the bit rate for LTE transmissions comprises decreasing the bit rate for the non-location data.