# US 10,374,687 B2 · Base station signal matching device and relay device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,687 B2 - Document ID: US10374687B2 - Status: Granted - Kind: B2 - Application number: 15/598,367 - Filed: 2017-05-18 - Published: 2017-09-07 - Granted: 2019-08-06 - Earliest claimed: 2013-12-20 - Assignees: SOLiD, INC. - Applicants: SOLiD, INC. - Inventors: Kyung Eun Han - Web page: https://patentgrep.com/patent/US10374687B2 ## CPC - H04B 7/15507: {Relay station based processing for cell extension or control of coverage area, (network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04)} - H04B 7/155: Ground-based stations (H04B7/204 takes precedence) - H04B 7/15535: {Control of relay amplifier gain (amplifier gain control in general H03G3/00; gain control reducing self - or loop interference H04B7/15578)} - H04W 52/46: in multi-hop networks, e.g. wireless relay networks - 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 base station signal matching device configured to receive a base station signal from a base transceiver station (BTS), the base station signal matching device is embedded in a relay device, and the base station signal matching device includes a signal attenuation unit configured to receive the base station signal and attenuate the input power level of the base station signal; and a signal matching unit configured to receive the base station signal passing through the signal attenuation unit to match the base station signal suitable for signal processing of the relay device. ## Claims ### Claim 1 A base station signal matching device included in a distributed antenna system, the base station signal matching device comprising: a signal attenuation unit configured to receive a base station signal from a base station and generate a first attenuated base station signal by attenuating a power level of the base station signal according to a fixed attenuation ratio; and a signal matching unit configured to generate a second attenuated base station signal by attenuating a power level of the first attenuated base station signal according to a first variable attenuation ratio, wherein the signal matching unit is further configured to receive a terminal signal from a terminal via the distributed antenna system, and generate a first attenuated terminal signal by attenuating a power level of the received terminal signal according to a second variable attenuation ratio, and wherein the signal attenuation unit is further configured to receive the first attenuated terminal signal from the signal matching unit, and generate a second attenuated terminal signal by attenuating a power level of the first attenuated terminal signal according to the fixed attenuation ratio. ### Claim 2 (depends on 1) The base station signal matching device of claim 1, wherein the signal attenuation unit includes: a first attenuator configured to attenuate the power level of the base station signal according to a first fixed attenuation ratio; and a second attenuator configured to attenuate the power level of the base station signal output from the first attenuator according to a second fixed attenuation ratio. ### Claim 3 (depends on 2) The base station signal matching device of claim 2, wherein the first fixed attenuation ratio is greater than the second fixed attenuation ratio. ### Claim 4 (depends on 2) The base station signal matching device of claim 2, wherein the first attenuator includes a signal attenuation medium coil with which an attenuation of a radio frequency (RF) signal is possible. ### Claim 5 (depends on 1) The base station signal matching device of claim 1, wherein the signal matching unit includes: a first filter configured to receive the first attenuated base station signal output from the signal attenuation unit and pass a first frequency band of the first attenuated base station signal; and a second filter configured to pass a second frequency band of the first attenuated terminal signal. ### Claim 6 (depends on 5) The base station signal matching device of claim 5, wherein the signal matching unit further includes: a first variable attenuator configured to generate the second attenuated base station signal by attenuating a power level of the first frequency band of the first attenuated base station signal to have a power level suitable for signal processing of the distributed antenna system according to the first variable attenuation ratio; and a second variable attenuator configured to generate the first attenuated terminal signal by attenuating a power level of the terminal signal according to the second variable attenuation ratio, and output the first attenuated terminal signal to the second filter. ### Claim 7 (depends on 6) The base station signal matching device of claim 6, wherein the signal matching unit further includes: a first power detector configured to monitor a power level of the first frequency band of the second attenuated base station signal output from the first variable attenuator; and a second power detector configured to monitor a power level of the first attenuated terminal signal output from the second variable attenuator. ### Claim 8 A distributed antenna system, comprising: a base station signal matching device configured to receive a plurality of base station signals and a plurality of terminal signals, and attenuate a power level of at least one of the plurality of base station signals and the plurality of terminal signals; and a signal combining/distributing device configured to combine the plurality of base station signals output from the base station signal matching device and distribute a plurality of terminal signals, which are received from a plurality of terminals via the distributed antenna system, to the base station signal matching device, wherein the base station signal matching device includes: at least one signal attenuation unit configured to generate a first attenuated base station signal by attenuating a power level of a corresponding base station signal among the plurality of base station signals according to a fixed attenuation ratio; and at least one signal matching unit configured to generate a second attenuated base station signal by attenuating a power level of the first attenuated base station signal according to a first variable attenuation ratio, wherein the at least one signal matching unit is further configured to receive a corresponding terminal signal among the plurality of terminal signals from the signal combining/distributing device, and generate a first attenuated terminal signal by attenuating a power level of the corresponding terminal signal according to a second variable attenuation ratio, and wherein the at least one signal attenuation unit is further configured to generate a second attenuated terminal signal by attenuating a power level of the first attenuated terminal signal according to the fixed attenuation ratio. ### Claim 9 (depends on 8) The distributed antenna system of claim 8, wherein the signal attenuation unit includes: a first attenuator configured to attenuate the power level of the corresponding base station signal according to a first fixed attenuation ratio; and a second attenuator configured to attenuate the power level of the corresponding base station signal output from the first attenuator according to a second fixed attenuation ratio. ### Claim 10 (depends on 9) The distributed antenna system of claim 9, wherein the first fixed attenuation ratio is greater than the second fixed attenuation ratio. ### Claim 11 (depends on 9) The distributed antenna system of claim 9, wherein the first attenuator includes a signal attenuation medium coil with which an attenuation of a radio frequency (RF) signal is possible. ### Claim 12 (depends on 8) The distributed antenna system of claim 8, wherein the signal matching unit includes: a first filter configured to receive the first attenuated base station signal output from the signal attenuation unit and pass a first frequency band of the first attenuated base station signal; and a second filter configured to pass a second frequency band of the first attenuated terminal signal. ### Claim 13 (depends on 12) The distributed antenna system of claim 12, wherein the signal matching unit further includes: a first variable attenuator configured to generate the second attenuated base station signal by attenuating a power level of the first frequency band of the first attenuated base station signal to have a power level suitable for signal processing of the distributed antenna system according to the first variable attenuation ratio; and a second variable attenuator configured to generate the first attenuated terminal signal by attenuating a power level of the corresponding terminal signal according to the second variable attenuation ratio, and output he first attenuated terminal signal to the second filter. ### Claim 14 (depends on 13) The distributed antenna system of claim 13, wherein the signal matching unit further includes: a first power detector configured to monitor a power level of the first frequency band of the corresponding base station signal output from the first variable attenuator; and a second power detector configured to monitor a power level of the first attenuated terminal signal output from the second variable attenuator.