# US 7,610,385 B2 · System and method for adaptive bandwidth utilization for interoperability > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,610,385 B2 - Document ID: US7610385B2 - Status: Granted - Kind: B2 - Application number: 10/338,009 - Filed: 2003-01-08 - Published: 2004-07-08 - Granted: 2009-10-27 - Earliest claimed: 2003-01-08 - Assignees: VTech Telecommunications Limited - Inventors: Sukhdeep S. Hundal; Supajet Guy Pothiboon - Web page: https://patentgrep.com/patent/US7610385B2 ## CPC - H04W 24/02: Arrangements for optimising operational condition - H04B 7/2621: {using frequency division multiple access [FDMA] (H04B7/2615 takes precedence)} - 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 Bandwidth usage in a radio communication device is readjusted to eliminate overlapping communication system bandwidth. The readjustment is made in consideration of communication channel quality and other activity in the spectrum in which the radio communications are desired. Using this information, a communication link is set up to avoid overlapping with other radio communications already present in the band. Frequencies at which significant degradation in the communication occurs are also avoided. In addition, for frequency hopping devices, hop sequence is readjusted in accordance with the newly assigned channels. ## Claims ### Claim 1 A system for adaptively maximizing bandwidth utilization in a cordless telephone system operating over a predetermined communication band, comprising: an activity sensor to determine frequencies being used by other communication systems using a the predetermined communication band; a link monitor to monitor a quality of a communication link by measuring one or more channels in the predetermined communications band; a bandwidth utilization profile generator to generate a profile of the predetermined communication band; and a link manager, implemented by the cordless telephone system, to manage and control the communication link to preclude use of a given frequency of the predetermined communication band when said given frequency is being used by at least one of said other communication systems in accordance with information provided by the bandwidth utilization profile, wherein the link manager uses the quality of the communication link to determine said given frequency is being used by at least one of said other communication systems, wherein the bandwidth utilization profile generator is configured to receive information from a second link manager on an opposite side of the communication link in order to determine whether errors determined by the link monitor are due to a frequency hopping interferer or fixed frequency interferer, wherein a frequency of interference from the frequency hopping interferer varies in time according to a hop sequence and wherein a frequency of interference from the fixed frequency interferer is constant; a hop sequence regenerator to generate a pseudo-random hop sequence according to the bandwidth utilization information provided by the bandwidth utilization profile generator, wherein the link manager precludes use of the said given frequency being used by at least one of said other communication systems in accordance with the pseudo-random hop sequence. ### Claim 2 (depends on 1) The system recited in claim 1, wherein the link manager determines said given frequency of the predetermined communication band using information from the activity sensor that identifies interferers. ### Claim 3 (depends on 1) The system recited in claim 1, wherein the quality of the communication link is bit error rate. ### Claim 4 (depends on 1) The system recited in claim 1, further comprising a dynamically adjustable link quality threshold to which the quality of the communication link is compared. ### Claim 5 (depends on 4) The system recited in claim 4, wherein the link manager determines said given frequency being used by at least one of said other communication systems periodically. ### Claim 6 (depends on 1) The system recited in claim 1, further comprising a predetermined link quality threshold to which the quality of the communication link is compared. ### Claim 7 (depends on 1) The system recited in claim 1, wherein the link manager determines said given frequency being used by at least one of said other communication systems dynamically. ### Claim 8 (depends on 7) The system recited in claim 7, wherein the link manager determines said given frequency being used by at least one of said other communication systems according to a predetermined schedule. ### Claim 9 (depends on 7) The system recited in claim 7, wherein the link manager determines said given frequency being used by at least one of said other communication systems on a random basis. ### Claim 10 A method for adaptively maximizing bandwidth utilization in a cordless telephone system, comprising: determining frequencies being used by other communication systems using a predetermined communication band; monitoring, using a link monitor, a quality of a communication link to determine available frequencies not being used by at least one of said other communication systems; generating, using a bandwidth utilization profile generator, a bandwidth utilization profile of the predetermined communication band; and using a link manager, implemented by the cordless telephone system, to control the communication link to determine available frequencies not being used by at least one of said other communication systems in accordance with information provided by the bandwidth utilization profile, wherein the bandwidth utilization profile generator is configured to receive information from a second link manager on an opposite side of the communication link in order to determine whether errors determined by the link monitor are due to a frequency hopping interferer or fixed frequency interferer, wherein a frequency of interference from the frequency hopping interferer varies in time according to a hop sequence and wherein a frequency of interference from the fixed frequency interferer is constant; generating a pseudo-random hop sequence according to the bandwidth utilization profile; and controlling the communication in accordance with the generated pseudo-random hop sequence. ### Claim 11 (depends on 10) The method recited in claim 10, further comprising: identifying interferers in the predetermined communication band; and using the identifications to determine the available frequencies not being used by at least one of said other communication systems. ### Claim 12 (depends on 10) The method recited in claim 10, further comprising: monitoring a link quality; and comparing the link quality to a link quality threshold to determine available frequencies not being used by at least one of said other communication systems. ### Claim 13 (depends on 12) The method recited in claim 12, further comprising predetermining the link quality threshold. ### Claim 14 (depends on 13) The method recited in claim 13, wherein the link quality is bit error rate. ### Claim 15 (depends on 12) The method recited in claim 12, further comprising dynamically adjusting the link quality threshold. ### Claim 16 (depends on 15) The method recited in claim 15, wherein the link quality is bit error rate. ### Claim 17 (depends on 10) The method recited in claim 10, further comprising determining available frequencies not being used by at least one of said other communication systems dynamically. ### Claim 18 (depends on 17) The method recited in claim 17, further comprising determining available frequencies not being used by at least one of said other communication systems periodically. ### Claim 19 (depends on 17) The method recited in claim 17, further comprising determining available frequencies not being used by at least one of said other communication systems according to a predetermined schedule. ### Claim 20 (depends on 17) The method recited in claim 17, further comprising determining available frequencies not being used by at least one of said other communication systems on a random basis. ### Claim 21 A system for adaptively maximizing bandwidth utilization in a cordless telephone system, comprising: means for determining frequencies being used by other communication systems using a predetermined communication band; means for monitoring a quality of a communication link to determine available frequencies not being used by at least one of said other communication systems; means for generating a bandwidth utilization profile of the predetermined communication band; and means for controlling communication to determine available frequencies not being used by at least one of said other communication systems in accordance with information provided by the bandwidth utilization profile, wherein the means for generating a bandwidth utilization profile is configured to receive information from a second means for controlling communication disposed on an opposite side of the communication link in order to determine whether errors determined by the means for monitoring are due to a frequency hopping interferer or fixed frequency interferer, wherein a frequency of interference from the frequency hopping interferer varies in time according to a hop sequence and wherein a frequency of interference from the fixed frequency interferer is constant; means for generating a pseudo-random hop sequence according to the bandwidth utilization profile; and means for controlling the communication in accordance with the generated pseudo-random hop sequence. ### Claim 22 (depends on 21) The system recited in claim 21, further comprising: means for identifying interferers in the predetermined communication band; and means for using the identifications to determine the available frequencies not being used by at least one of said other communication systems. ### Claim 23 (depends on 21) The system recited in claim 21, further comprising: means for monitoring a link quality; and means for comparing the link quality to a link quality threshold to determine available frequencies not being used by at least one of said other communication systems. ### Claim 24 (depends on 23) The system recited in claim 23, further comprising means for predetermining the link quality threshold. ### Claim 25 (depends on 24) The system recited in claim 24, wherein the link quality is bit error rate. ### Claim 26 (depends on 23) The system recited in claim 23, further comprising means for dynamically adjusting the link quality threshold. ### Claim 27 (depends on 26) The system recited in claim 26, wherein the link quality is bit error rate. ### Claim 28 (depends on 21) The system recited in claim 21, further comprising means for determining available frequencies not being used by at least one of said other communication systems dynamically. ### Claim 29 (depends on 28) The system recited in claim 28, further comprising means for determining available frequencies not being used by at least one of said other communication systems periodically. ### Claim 30 (depends on 28) The system recited in claim 28, further comprising means for determining available frequencies not being used by at least one of said other communication systems according to a predetermined schedule. ### Claim 31 (depends on 28) The system recited in claim 28, further comprising means for determining available frequencies not being used by at least said one of said other communication systems on a random basis.