# US 2014/0192788 A1 · Multi-radio controller and methods for preventing interference between co-located transceivers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192788 A1 - Document ID: US20140192788A1 - Status: Published application - Kind: A1 - Application number: 14/153,789 - Filed: 2014-01-13 - Published: 2014-07-10 - Earliest claimed: 2008-12-30 - Assignees: Intel Corporation - Inventors: Minyoung Park; Jing Zhu - Web page: https://patentgrep.com/patent/US20140192788A1 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 24/02: Arrangements for optimising operational condition - H04W 52/0235: {where the received signal is a power saving command} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/1215: {for collaboration of different radio technologies} - H04W 72/541: using the level of interference - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - 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 Embodiments of a multi-radio controller and methods for preventing interference between co-located transceivers are generally described herein. In some embodiments, the multi-radio controller operates within a multi-radio device and is configured to cause a wireless local area network (WLAN) transceiver to transmit a triggering frame after an active period of a wireless wide-area network (WWAN) transceiver. The triggering frame indicates the duration of a transmission opportunity, which may be restricted to the time between active periods of the WWAN. In response to receipt of the triggering frame, the WLAN access point is configured to transmit a downlink data frame within the transmission opportunity. ## Claims ### Claim 1 (canceled) ### Claim 2 User Equipment (UE) comprising: a multi-radio controller for controlling a Wi-Fi transceiver an a LTE transceiver, the multi-radio controller configured to: determine a duration of a transmission opportunity (TXOP) based on an active period interval of the LIE transceiver; configure a triggering frame to indicate that the Wi-Fi transceiver is granting permission to an access point to send data in accordance with a reverse direction (RD) protocol, the triggering frame to indicate at least a duration of the TXOP; and transmit the triggering frame within the TXOP immediately after an active period of the LTE transceiver. ### Claim 3 (depends on 2) The UE of claim 2 wherein to configure the triggering frame, the multi-radio controller is arranged to set a Reverse Direction Grant (RDG) More PPDU bit of a control field in the triggering frame. ### Claim 4 (depends on 3) The UE of claim 3 wherein the multi-radio controller is arranged to configure the Wi-Fi transceiver to operate in a power-saving delivery (PSD) mode during the active period of the LIE transceiver. ### Claim 5 (depends on 4) The UE of claim 4 wherein as part of PSD mode, the multi-radio controller is arranged to configure the Wi-Fi transceiver to set a power saving (PS) bit in a null frame for transmission to the access point to indicate to the access point that the Wi-Fi transceiver is operating in the PSD mode, and wherein during PSD mode, the access point is to refrain from transmitting do data frames to the Wi-Fi transceiver unless requested by the Wi-Fi transceiver. ### Claim 6 (depends on 4) The UE of claim 4 wherein the multi-radio controller is arranged to cause the Wi-Fi transceiver to obtain the TROP, the TXOP to occur during a transmission and reception free period between consecutive active periods of the LTE transceiver. ### Claim 7 (depends on 6) The UE of claim 6 wherein during the active period of the LIE transceiver, the LIE transceiver is arranged to transmit and/or receive. ### Claim 8 (depends on 7) The UE of claim 7 wherein the multi-radio controller is arranged to cause the Wi-Fi transceiver to receive a downlink data frame that is transmitted by the access point within. the TXOP in response to receipt of the triggering frame. ### Claim 9 (depends on 8) The UE of claim 8 wherein the multi-radio controller is arranged to cause the Wi-Fi transceiver to receive a block-acknowledge (BA) from the access point to acknowledge receipt of the triggering frame, the BA to be received prior to the downlink data frame, and wherein the RI)G More PPDU bit, when set, indicates that an additional frame will follow the BA, the additional frame being the downlink data frame. ### Claim 10 (depends on 4) The UE of claim 4 wherein the Wi-Fi transceiver and LTE transceiver are part of a physical layer of the UE and are coupled with two or more antennas configured for multiple-input multiple output (MIMO) communications, ### Claim 11 (depends on 10) The UE of claim 10 wherein the LIE transceiver is configured for orthogonal frequency division multiple access (OFDMA) communications with an enhanced Node B (eNB) during active periods of the active period intervals, and wherein the Wi-Fi transceiver is configured for orthogonal frequency division multiplexed (OFDM) communications with the access point in accordance with a contention-based multiple-access technique. ### Claim 12 A method performed by user equipment (UE) for controlling a Wi-Fi transceiver and a LIE transceiver, the method comprising: determining a duration of a transmission opportunity (TXOP) based on an active period interval of the LIE transceiver; configuring a triggering frame to indicate that the Wi-Fi transceiver is granting permission to an access point to send data in accordance with a reverse direction (RD) protocol, the triggering frame to indicate at least a duration of the TXOP; and transmitting the triggering frame within the TXOP immediately after an active period of the LIE transceiver. ### Claim 13 (depends on 12) The method of claim 12 wherein to configure the triggering frame, the method comprises setting a Reverse Direction Grant (RDG) More PPDU bit of a control field in the triggering frame. ### Claim 14 (depends on 13) The method of claim 13 wherein the method comprises configuring the Wi-Fi transceiver to operate in a power-saving delivery (PSD) mode during the active period of the LIE transceiver. ### Claim 15 (depends on 14) The method of claim 14 wherein as part of PSD mode, the method comprises configuring the Wi-Fi transceiver to set a power saving (PS) bit in a null frame for transmission to the access point to indicate to the access point that the Wi-Fi transceiver is operating in the PSD mode, and wherein during PSD mode, the access point is to refrain from transmiting downlink data frames to the Wi-Fi transceiver unless requested by the Wi-Fi transceiver. ### Claim 16 (depends on 14) The method of claim 14 wherein the method comprises configuring the Wi-Fi transceiver to obtain the TXOP, the TXOP to occur during a transmission and reception free period between consecutive active periods of the LTE transceiver. ### Claim 17 (depends on 16) The method of claim 16 wherein during the active period of the LIE transceiver, the LIE transceiver is arranged to transmit and/or receive. ### Claim 18 (depends on 17) The method of claim 17 wherein the method comprises configuring the Wi-Fi transceiver to receive a downlink data frame that is transmitted by the access point within the TXOP in response to receipt of the triggering frame. ### Claim 19 (depends on 18) The method of claim 18 wherein the method comprises configuring the Wi-Fi transceiver to receive a block-acknowledge (BA) from the access point to acknowledge receipt of the triggering frame, the BA to be received prior to the downlink data frame, and wherein the RDC More PPDU bit, when set, indicates that an additional frame will follow the BA, the additional frame being the downlink data frame. ### Claim 20 (depends on 14) The method of claim 14 wherein the Wi-Fi transceiver and LTE transceiver are part of a physical layer of the UE and are coupled with two or more antennas configured for multiple-input multiple-output (MIMO) communications. ### Claim 21 (depends on 20) The method of claim 20 wherein the LIE transceiver is configured for orthogonal frequency division multiple access (OFDMA) communications with an enhanced Node B (eNB) during active periods of the active period intervals, and wherein the Wi-Fi transceiver is configured for orthogonal frequency division multiplexed (OFDM) communications with the access point in accordance with a contention-based multiple-access technique. ### Claim 22 A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for controlling a multi-radio controller of user equipment (LTE) having a Wi-Fi transceiver and a LIE transceiver, the operations to configure the UE to: determine a duration of a transmission opportunity (TROP) based on an active period interval of the LTE transceiver; configure a triggering frame to indicate that the Wi-Fi transceiver is granting permission to an access point to send data in accordance with a reverse direction (RD) protocol, the triggering frame to indicate at least a duration of the TXOP; and transmit the triggering frame within the TXOP immediately after an active period of the LTE transceiver. ### Claim 23 (depends on 22) The non-transitory computer-readable storage medium of claim 22 wherein to configure the triggering frame, the multi-radio controller is arranged to set a Reverse Direction Grant (RDG) More PPDU bit of a control field in the triggering frame, wherein the multi-radio controller is arranged to configure the Wi-Fi transceiver to operate in a power-saving delivery (PSD) mode during the active period of the LTE, transceiver, wherein as part of PSD mode, the multi-radio controller is arranged to configure the WI-Fi transceiver to set a power saving (PS) bit in a null frame for transmission to the access point to indicate to the access point that the Wi-Fi transceiver is operating in the PSD mode, wherein during PSD mode, the access point is to refrain from transmitting downlink data frames to the Wi-Fi transceiver unless requested by the Wi-Fi transceiver, and wherein the multi-radio controller is arranged to cause the Wi-Fi transceiver to obtain the TXOP, the TXOP to occur during a transmission and reception free period between consecutive active periods of the LTE transceiver.