Huawei Technologies Canada Co., Ltd.

Other

Hao Li

Osama S Aboul-Magd

Jung Hoon Suh

Kwok Shum Au

Xianbin Wang

Methods and systems that enable payload data to be spread over a number of a plurality of sub-carriers for wireless transmissions between Access Points (AP) and stations (STA) in a WLAN. The AP receives each STA's status information, and controls an amount of spreading of the payload data that can flexibly and variably takes into account the desired amount of peak power consumption, the required data rate, and the channel conditions. Based on these factors, the AP determines a number of sub-carriers for each STA that will be used to carry the spread payload data. Example embodiments can address high power peak consumption, data rate inflexibility and inefficient spectrum communication as found in conventional wireless systems.

Dynamic spectrum spreading of data symbols for multiple access transmission

Methods and systems for scheduling successive transmissions in a wireless local area network (WLAN). An Access Point (AP) can generate a control signal that includes an identifier field for indicating that previous resource allocation from a previous transmission is to be repeated, and therefore the control signal itself does not contain resource allocation information. One or more stations (STAs) can receive the control signal and can use the previous resource allocation information stored in their respective memory to perform the transmission. The resource allocation can include three-dimensional (3D) resource allocation, which refers to time, frequency and space-domain multiplexing. Because the control signal has the identifier field, the AP can reduce network load and free resources for payload data or other traffic.

Scheduling of successive multi-user (MU) transmissions in a wireless local area network (LAN)

A method and surveillance system are presented for detecting and alarming intrusions that are caused by unwanted people in a protected area, by exploiting interactions between the wireless communication and monitoring devices of the surveillance system but no special sensors. An intrusion in the protected area is primarily detected by analyzing the variation of the wireless channel observed at the wireless communication device, and further confirmed by images captured by the monitoring device, where the image capture can be triggered by the intrusion detection result. The threshold used to primarily determine the existence of an intrusion is self-calibrated by comparing the result of the channel-variation based intrusion detection with the findings of the captured images. Moreover, an intrusion caused by authorized people of the protected area is identified through checking the connection status of the secured wireless communication network in the protected area, and then filtered out.

Growing community of inventors

London, Canada

Hao Li