Source: https://patents.justia.com/patent/10516457
Timestamp: 2020-02-18 19:56:38
Document Index: 765982832

Matched Legal Cases: ['§ 111', '§ 120', '§ 365', 'Application No. 61', 'Application No. 61', 'Application No. 61', '§ 119']

US Patent for Beamforming enhancements for spatial reuse in wireless networks Patent (Patent # 10,516,457 issued December 24, 2019) - Justia Patents Search
Justia Patents Communication Over Free SpaceUS Patent for Beamforming enhancements for spatial reuse in wireless networks Patent (Patent # 10,516,457)
Dec 27, 2015 - MEDIATEK Singapore Pte. Ltd.
METHODS AND APPARATUS FOR ENHANCED RANDOM ACCESS PROCEDURE
This application is filed under 35 U.S.C. § 111(a) and is based on and hereby claims priority under 35 U.S.C. § 120 and § 365(c) from International Application No. PCT/US14/44471, with an international filing date of Jun. 27, 2014, which in turn claims priority from U.S. Provisional Application No. 61/840,671 filed on Jun. 28, 2013, U.S. Provisional Application No. 61/845,703 filed on Jul. 12, 2013, and U.S. Provisional Application No. 61/861,561 filed on Aug. 2, 2013. This application is a continuation of International Application No. PCT/US14/44471, which claims priority from U.S. Provisional Application Nos. 61/840,671, 61/845,703, and 61/861,561. International Application No. PCT/US14/44471 is pending as of the filing date of this application, and the United States is a designated state in International Application No. PCT/US14/44471. This application claims the benefit under 35 U.S.C. § 119 from U.S. Provisional Application Nos. 61/840,671, 61/845,703, and 61/861,561. The disclosure of each of the foregoing documents is incorporated herein by reference.
In the example of FIG. 3, suppose STA1 is a spatially reciprocal device. Without beamforming, STA1 can hear radio signal 311 transmitted from STA2, and/or radio signal 312 transmitted from AP2. Those radio signals are interfering radio signals from STA1's perspective. With beamforming, STA1 can no longer hear radio signal 311 transmitted from STA2, nor radio signal 312 transmitted from AP2, if STA1 uses a beamformed antenna pattern 320 with certain weights. Furthermore, because STA1 is a spatially reciprocal device, the radio signals transmitted from STA1 do not interfere STA2 nor AP2 if STA1 applies with the same beamformed antenna pattern 320. Because of beamformed SR transmission, OBSS devices STA1 and STA2/AP2 no longer interfere with each other, which makes spatial reuse possible.
performing a clear channel assessment (CCA) by an initiating wireless device to gain a transmitting opportunity (TXOP), wherein the initiating device belongs to a basic service set (BSS) and detects channel busy due to other interfering radio signals from an overlapping BSS (OBSS) in a wireless network;
obtaining a spatially orthogonal (SO) condition between radio signals in the BSS with the other interfering radio signals from the OBSS using a reciprocal beamformed antenna pattern; and
transmitting radio signals to a target device of the BSS using the reciprocal beamformed antenna pattern upon satisfying the SO condition to achieve spatial reuse between the BSS and the OBSS, wherein the initiating device achieves the spatial reuse by first obtaining the SO condition and then transmitting a request to send (RTS) frame to the target device and receive a clear to send frame (CTS) from the target device.
initializing a spatial reuse beamformed frame exchange by transmitting the request to send (RTS) frame to the target device using the spatially reciprocal beamformed antenna pattern; and
continuing the beamformed frame exchange with the target device during the TXOP upon receiving the clear to send (CTS) frame from the target device.
a clear channel assessment (CCA) module that performs a channel sensing to gain a transmitting opportunity (TXOP), wherein the wireless device belongs to a basic service set (BSS) and detects channel busy due to other interfering radio signals from an overlapping BSS (OBSS) in a wireless network;
a beamforming module that obtains a spatially orthogonal (SO) condition between radio signals in the BSS with the other interfering radio signals from the OBSS using a reciprocal beamformed antenna pattern; and
a transmitter that transmits radio signals to a target device of the BSS using the reciprocal beamformed antenna pattern upon satisfying the SO condition to achieve spatial reuse between the BSS and the OBSS, wherein the wireless device achieves the spatial reuse by first obtaining the SO condition and then transmitting a request to send (RTS) frame to the target device and receive a clear to send frame (CTS) from the target device.
12. The device of claim 11, wherein the device initializes a spatial reuse beamformed frame exchange by transmitting the request to send (RTS) frame to the target device using the spatially reciprocal beamformed antenna pattern, and wherein the device continues the beamformed formed frame exchange during the TXOP upon receiving the clear to send (CTS) frame from the target device.
initiating a transmitting opportunity (TXOP) based beamformed frame exchange with a non-access point station (non-AP STA) by an AP belonging to a basic service set (BSS) in a wireless network;
switching to beamformed transmission and reception with the STA for the remainder of the TXOP duration, wherein the beamformed transmission and reception is for both preamble and payload of each frame, and wherein the TXOP-based beamformed frame exchange enables spatial reuse for other devices under spatially orthogonal (SO) condition, wherein the SO condition is obtained between radio signals in the BSS with the other interfering radio signals from an overlapping BSS (OBSS) using a reciprocal beamformed antenna pattern.
23. The method of claim 21, wherein the spatially orthogonal condition may be obtained with or without beamforming.
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Patent Publication Number: 20160112107
Inventors: James June-Ming Wang (San Marino, CA), Jianhan Liu (San Jose, CA), Thomas Edward Pare, Jr. (Mountain View, CA), Chao-Chun Wang (Taipei), Chih-Shi Yee (Hsinchu), YungPing Hsu (Taipei)
International Classification: H04B 7/06 (20060101); H04W 74/08 (20090101); H04L 1/00 (20060101);