Patents by Inventor Amjad Ali Soomro
Amjad Ali Soomro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7801544Abstract: A method and apparatus for adjusting the transmission power level or transmission data rate between a plurality of stations located within the coverage area of a basic service set (BSS) or in an independent basic service set (IBSS) in a wireless local area network (WLAN). The receiving station extracts a transmission data rate from an incoming signal, determines a signal-to-noise ratio (SNR) for the incoming signal, and then calculates noise margin information based on a difference between the SNR of the incoming signal and a minimum SNRMIN for the extracted data rate. The noise margin is then transmitted back to the original transmitting station and using the noise margin information, the transmit power level and/or the transmission rate of this station may be adjusted accordingly.Type: GrantFiled: June 11, 2002Date of Patent: September 21, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Amjad Ali Soomro, Sunghyun Choi
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Patent number: 7164671Abstract: The present invention is related to a medium access control (MAC) protocol for avoiding collisions among ESTAs when two or more overlapping basic service sets (OBSSs) co-exist and operate in the same channel. To achieve this, each mobile station operating under HCF maintains a first counter known as Network Allocation Vector (NAV) and a second counter known as Overlapping Network Allocation Vector (ONAV), which is updated within a mobile station by frames coming from OBSSs, during the Contention Free Period (CFP) or during a Contention Free Burst (CFB) granted by a polling frame. The mobile station uses the NAV to update only to the medium occupancy in its own BSS to ensure that the mobile station will not interfere with the transmissions in its own QBSS, while the ONAV is used to avoid collisions with the mobile stations from the OBSS.Type: GrantFiled: December 27, 2001Date of Patent: January 16, 2007Assignee: Koninklijke Philips Electronics N.V.Inventors: Javier del Prado, Sunghyun Choi, Amjad Ali Soomro
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Patent number: 6985465Abstract: Disclosed is a method and system for dynamically selecting a communication channel between an access point (AP) and a plurality of stations (STAs) in an IEEE 802.11 wireless local area network (WLAN). The method includes the steps of: determining whether a new channel between the AP and STAs within a particular basic service set (BSS) is needed; requesting a channel signal quality measure to some of the plurality of stations by the AP; reporting a channel signal quality report back to the AP based on a received signal strength indication (RSSI) and a packet error rate (PER) of all channels detected by the stations within the BSS; selecting a new channel based on the channel quality report for use in communication between the AP and the plurality of stations.Type: GrantFiled: July 9, 2001Date of Patent: January 10, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Gerard G Cervello, Sunghyun Choi, Stefan Mangold, Amjad Ali Soomro
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Patent number: 6978151Abstract: A method and apparatus for determining the transmission power level between a plurality of stations located within the coverage area of a basic service set (BSS) in a wireless local area network (WLAN). The receiving station measures a received signal power from the transmitting station, then the path loss estimation is computed based on the difference between the received signal power and the transmit power level extracted from the incoming signal. The computed path loss is updated according predetermined criteria. Based on the updated path loss information, the transmit power level and/or the transmission rate of a receiving station is adjusted.Type: GrantFiled: October 10, 2001Date of Patent: December 20, 2005Assignee: Koninklijke Philips Electronics N.V.Inventors: Sunghyun Choi, Amjad Ali Soomro
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Publication number: 20030171116Abstract: Disclosed is a method and system for switching at least one wireless node located within the coverage area of a basic-service set (BSS) or infrastructure-basic-service set (IBSS) in a wireless local-area network (WLAN) from a first communication channel to a second communication channel. In one embodiment, the method includes the steps of: determining whether the second communication channel to be used by at least one wireless node is needed; broadcasting by a source node a management frame to at least one of the wireless node when it is determined that the second communication channel is needed, the management frame including a channel-switch time and a second communication channel identifier; and switching, at least one wireless node receiving the management frame, from the first communication channel to a second communication channel within a countdown time corresponding to the channel switch time, wherein the channel-switch time is less than a beacon interval.Type: ApplicationFiled: November 5, 2002Publication date: September 11, 2003Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventor: Amjad Ali Soomro
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Publication number: 20030123405Abstract: The present invention is related to a medium access control (MAC) protocol for avoiding collisions among ESTAs when two or more overlapping basic service sets (OBSSs) co-exist and operate in the same channel. To achieve this, each mobile station operating under HCF maintains a first counter known as Network Allocation Vector (NAV) and a second counter known as Overlapping Network Allocation Vector (ONAV), which is updated within a mobile station by frames coming from OBSSs, during the Contention Free Period (CFP) or during a Contention Free Burst (CFB) granted by a polling frame. The mobile station uses the NAV to update only to the medium occupancy in its own BSS to ensure that the mobile station will not interfere with the transmissions in its own QBSS, while the ONAV is used to avoid collisions with the mobile stations from the OBSS.Type: ApplicationFiled: December 27, 2001Publication date: July 3, 2003Applicant: Koninklijke Philips Electronics N.V.Inventors: Javier del Prado, Sunghyun Choi, Amjad Ali Soomro
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Publication number: 20030022686Abstract: A method and apparatus for adjusting the transmission power level or transmission data rate between a plurality of stations located within the coverage area of a basic service set (BSS) or in an independent basic service set (IBSS) in a wireless local area network (WLAN). The receiving station extracts a transmission data rate from an incoming signal, determines a signal-to-noise ratio (SNR) for the incoming signal, and then calculates noise margin information based on a difference between the SNR of the incoming signal and a minimum SNRMIN for the extracted data rate. The noise margin is then transmitted back to the original transmitting station and using the noise margin information, the transmit power level and/or the transmission rate of this station may be adjusted accordingly.Type: ApplicationFiled: June 11, 2002Publication date: January 30, 2003Applicant: Koninklijke Philips Electronics N.V.Inventors: Amjad Ali Soomro, Sunghyun Choi
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Publication number: 20020168993Abstract: A method and apparatus for determining the transmission power level between a plurality of stations located within the coverage area of a basic service set (BSS) in a wireless local area network (WLAN). The receiving station measures a received signal power from the transmitting station, then the path loss estimation is computed based on the difference between the received signal power and the transmit power level extracted from the incoming signal. The computed path loss is updated according predetermined criteria. Based on the updated path loss information, the transmit power level and/or the transmission rate of a receiving station is adjusted.Type: ApplicationFiled: October 10, 2001Publication date: November 14, 2002Applicant: Koninklijke Philips Electronics N.V.Inventors: Sunghyun Choi, Amjad Ali Soomro
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Publication number: 20020060995Abstract: Disclosed is a method and system for dynamically selecting a communication channel between an access point (AP) and a plurality of stations (STAs) in an IEEE 802.11 wireless local area network (WLAN). The method includes the steps of: determining whether a new channel between the AP and STAs within a particular basic service set (BSS) is needed; requesting a channel signal quality measure to some of the plurality of stations by the AP; reporting a channel signal quality report back to the AP based on a received signal strength indication (RSSI) and a packet error rate (PER) of all channels detected by the stations within the BSS; selecting a new channel based on the channel quality report for use in communication between the AP and the plurality of stations.Type: ApplicationFiled: July 9, 2001Publication date: May 23, 2002Applicant: Koninklijke Philips Electronics N.V.Inventors: Gerard G. Cervello, Sunghyun Choi, Stefan Mangold, Amjad Ali Soomro
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Patent number: RE45019Abstract: A method and apparatus for adjusting the transmission power level or transmission data rate between a plurality of stations located within the coverage area of a basic service set (BSS) or in an independent basic service set (IBSS) in a wireless local area network (WLAN). The receiving station extracts a transmission data rate from an incoming signal, determines a signal-to-noise ratio (SNR) for the incoming signal, and then calculates noise margin information based on a difference between the SNR of the incoming signal and a minimum SNRMIN for the extracted data rate. The noise margin is then transmitted back to the original transmitting station and using the noise margin information, the transmit power level and/or the transmission rate of this station may be adjusted accordingly.Type: GrantFiled: September 21, 2012Date of Patent: July 15, 2014Assignee: Koninklijke Philips N.V.Inventors: Amjad Ali Soomro, Sunghyun Choi
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Patent number: RE47911Abstract: A method and apparatus for adjusting the transmission power level or transmission data rate between a plurality of stations located within the coverage area of a basic service set (BSS) or in an independent basic service set (IBSS) in a wireless local area network (WLAN). The receiving station extracts a transmission data rate from an incoming signal, determines a signal-to-noise ratio (SNR) for the incoming signal, and then calculates noise margin information based on a difference between the SNR of the incoming signal and a minimum SNRMIN for the extracted data rate. The noise margin is then transmitted back to the original transmitting station and using the noise margin information, the transmit power level and/or the transmission rate of this station may be adjusted accordingly.Type: GrantFiled: June 20, 2014Date of Patent: March 17, 2020Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Amjad Ali Soomro, Sunghyun Choi