# US 10,122,406 B2 · Coexistence over a shared band with dual antenna sharing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,406 B2 - Document ID: US10122406B2 - Status: Granted - Kind: B2 - Application number: 15/195,721 - Filed: 2016-06-28 - Published: 2016-12-29 - Granted: 2018-11-06 - Earliest claimed: 2015-06-29 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Heechoon Lee; Won-Joon Choi; Ning He - Web page: https://patentgrep.com/patent/US10122406B2 ## CPC - H04B 1/401: for selecting or indicating operating mode - H04B 1/18: Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) - H04W 36/1446: {wherein at least one of the networks is unlicensed} - H04W 48/16: Discovering, processing access restriction or access information - H04W 76/10: Connection setup - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 72/1215: {for collaboration of different radio technologies} - H04W 84/12: WLAN [Wireless Local Area 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 This disclosure provides techniques for managing antenna sharing on a multi-mode wireless device between coexisting cellular and WLAN modems operating on the same band. One of the modems can communicate a WLAN scanning parameter to another one of the modems, and the distribution of shared antennas between the cellular modem and the WLAN modem may be modified based at least in part on the communicated scanning parameter to accommodate a WLAN scan on channels in the shared band. The distribution of the shared antennas between the modems for the WLAN scan may additionally or alternatively be selected based at least in part on the source of a detected WLAN scanning trigger (e.g., whether the scan is triggered by an application of the wireless device or the WLAN modem of the wireless device). ## Claims ### Claim 1 A method of wireless communication at a wireless device comprising a plurality of antennas, comprising: receiving a wireless local area network (WLAN) scanning parameter at a WLAN modem of the wireless device from a cellular modem of the wireless device, wherein the WLAN modem is associated with a WLAN network and the cellular modem is associated with a cellular network; modifying a distribution of the plurality of antennas between the WLAN modem and the cellular modem based at least in part on the WLAN scanning parameter, wherein the WLAN scanning parameter comprises a duty cycle associated with a previous WLAN scan by the WLAN modem; and performing, by the WLAN modem, a WLAN scan on channels in a band that is shared by the WLAN modem and the cellular modem based at least in part on the distribution of the plurality of antennas. ### Claim 2 (depends on 1) The method of claim 1, wherein modifying the distribution of the plurality of antennas between the WLAN modem and the cellular modem comprises: performing a diversity antenna tune-away for the WLAN scan. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining a state of the WLAN modem at the cellular modem; and transmitting, by the cellular modem, the WLAN scanning parameter to the WLAN modem based at least in part on the state of the WLAN modem. ### Claim 4 (depends on 1) The method of claim 1, wherein the WLAN scanning parameter comprises an indication of a start time and a duration of the WLAN scan. ### Claim 5 (depends on 1) The method of claim 1, further comprising: determining the duty cycle at the cellular modem based at least in part on the previous WLAN scan by the WLAN modem. ### Claim 6 (depends on 1) The method of claim 1, wherein the duty cycle indicates a first period and a second period, and wherein modifying the distribution of the plurality of antennas between the first modem and the second modem comprises: coupling a subset of the plurality of antennas to the WLAN modem during the first period and to the cellular modem during the second period. ### Claim 7 (depends on 6) The method of claim 6, wherein performing the WLAN scan is based at least in part on a determination by the WLAN modem that a duration of the WLAN scan is shorter than the first period. ### Claim 8 (depends on 6) The method of claim 6, wherein modifying the distribution of the plurality of antennas comprises: decoupling the subset of the plurality of antennas from the cellular modem during the first period; and modifying the distribution of the plurality of antennas comprises: decoupling the subset of the plurality of antennas from the WLAN modem during the second period. ### Claim 9 An apparatus for wireless communication at a wireless device comprising a plurality of antennas, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive a wireless local area network (WLAN) scanning parameter at a WLAN modem of the wireless device from a cellular modem of the wireless device, wherein the WLAN modem is associated with a WLAN network and the cellular modem is associated with a cellular network; modify a distribution of the plurality of antennas between the WLAN modem and the cellular modem based at least in part on the WLAN scanning parameter, wherein the WLAN scanning parameter comprises a duty cycle associated with a previous WLAN scan by the WLAN modem; and perform, by the WLAN modem, a WLAN scan on channels in a band that is shared by the WLAN modem and the cellular modem based at least in part on the distribution of the plurality of antennas. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein modify the distribution of the plurality of antennas between the WLAN modem and the cellular modem comprises: perform a diversity antenna tune-away for the WLAN scan. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein the instructions are operable to cause the processor to: determine a state of the WLAN modem at the cellular modem; and transmit, by the cellular modem, the WLAN scanning parameter to the WLAN modem based at least in part on the state of the WLAN modem. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the WLAN scanning parameter further comprises an indication of a start time and a duration of the WLAN scan.