Mediatek Corporation

Mediatek Singapore Pte. Ltd.

Ralink Technology Corporation

Ching-Hwa Yu

James June-Ming Wang

Chih-Shi Yee

Li-Chun Ko

Yuh-Ren Jauh

Shih-Chang Su

Chao-Chun Wang

Chia-Ming Chang

Chia-Hsiang Hsu

Kai-Chun Chou

YungPing Hsu

Hsuan-Yu Liu

Ho-Chun Chiang

Jianhan Liu

Gabor Bajko

Tianyu Wu

Yasantha N Rajakarunanayake

Chi-Chen Lee

Tsai-Yuan Hsu

Rongsheng Huang

Chih-Chieh Chou

Tai-Cheng Liu

Yung-Ping Hsu

Mao-Lin Wu

Chieh-Chao Liu

Shao-Wei Chen

Yu-Hsun Chen

Chia-Shun Wan

Ming-Chun Cheng

Chun-Jen Tsai

Hsiao-Min Chen

Chen-Hai Yu

Cheok Yan Goh

A method of direction finding (DF) positioning based on a simplified antenna platform format in a wireless communication network is proposed. A receiver receives antenna platform format information of a transmitter having multiple antenna elements. The antenna platform format information comprises an antenna platform format indicator, antenna platform position and orientation information, a number of antenna elements, and switching delay, phase center, and polarization information for each antenna element. The receiver receives a plurality of direction finding sounding signals transmitted from the transmitter via the multiple antenna elements. The receiver performs a DF algorithm based on the plurality of DF sounding signals and the antenna platform format information and thereby estimating a DF solution. Finally, the receiver determines its own location information based on the estimated DF solution.

Direction finding antenna format

A method of STA-initiated uplink (UL) aggregation is proposed in a wireless communication system. Under the STA-initiated UL aggregation, an STA can gain access to the medium through contention and after winning the TXOP, it passes the TXOP ownership to its AP to allow it to trigger UL MU transmission. Thus, the AP has increased chance of utilizing the medium while maintains fairness to both legacy APs and STAs. In addition, once AP takes over ownership of the TXOP, if it detects idle secondary channels, it can enable UL aggregation over the idle secondary channels, thereby fully utilizing the entire system bandwidth.

STA initiated uplink aggregation in wireless communication systems

A method of performing OFDMA transmission with aggregation from multiple access categories to improve channel utilization of a wireless channel is proposed. In one novel aspect, data from multiple access categories are allowed to be aggregated and transmitted in the same packet to utilize idle time efficiently. In downlink OFDMA, AP can send different AC data to different STAs so that AP can better arrange the transmission resource block. If the resource for one STA has long enough idle time, AP can aggregate more data that is different to the current AC for the same STA to better utilize the resource. In UL OFDMA, different STAs can send different AC data to AP. If the resource for one STA has long enough idle time, the STA can aggregate more data that is different to the current AC to better utilize the resource.

Gaining an mu-TXOP for transmitting packet using OFDMA

A method of mitigating inter-BSS interference via synchronized inter-BSS operation is proposed. By aligning the transmission of UL and DL transmission in two overlapping OBSSs, the inter-BSS STA-to-STA and inter-BSS AP-to-AP types of interference can be eliminated. Furthermore, based on the BSS overlapping geometry and the STA location, different interference mitigation schemes can be applied to mitigate inter-BSS AP-to-STA and inter-BSS STA-to-AP types of interference.

Collaborative OBSS interference mitigation for wireless communication systems

A method of managing data transmission for a receiving terminal of a first wireless system wherein the first wireless system coexists with at least one second wireless system includes receiving a transmission schedule of each of the at least one second wireless system; determining a usable time period for the first wireless system according to the transmission schedule of each of the at least one second wireless system; and sending a clear to send (CTS) to self signal or a power saving signal to indicate an interruption of the usable time period according to a length of the usable time period.

Method of managing data transmission for wireless system

A method of performing contention-based uplink OFDMA transmission is proposed in accordance with one novel aspect. A wireless communications station (an AP) reserves both dedicated resource and contention resource for uplink OFDMA operation for a list of communications devices (STAs). For contention-based random access, the AP does not need to collect traffic requests from the STAs. The AP only needs to make simple resource arrangement. The AP only needs to specify the allocated resource for random access and the uplink OFDMA operation duration and timing for each uplink OFDMA packet. Each STA having traffic request will contend the resource based on a random access probability scheme.

Contention based uplink orthogonal frequency-division multiple access (OFDMA)

A method of spatial re-use with TPC and adaptive CCA is proposed. A spatial re-use station detects spatial re-use information associated with other peer OBSS stations. The spatial re-use information comprises a TX spectral density (power/Hz) and received signal or interference information of each inter-BSS peer station. The spatial re-use STA determines a TX spectral density based on the detected spatial re-use information. The spatial re-use STA then contends the medium for spatial re-use transmission opportunity (TXOP) with an intra-BSS peer station. Finally, the spatial re-use STA starts spatial re-use frame exchange with the intra-BSS peer station using the determined TX spectral density. By adjusting the TX spectral density, the spatial re-use STA adapts its CCA level to spatially reuse the medium without causing collision and interference to OBSS stations and thus increases network throughput.

Adaptive CCA and TX power level adjustment for dense deployment of wireless networks

A method of fast link adaptation for Bluetooth long-range wireless networks is provided. A data packet comprises a preamble, a first packet portion including a rate indication field, and a second packet portion including a PDU. The first packet portion is encoded using a first modulation and coding scheme with a first rate while the second packet portion is encoded using a second modulation and coding scheme with a second rate indicated by the RI field. A transmitter thus can use different MCS options to support variable data rates by adapting to channel conditions, and then uses the novel RI field to indicate the data rate to a receiver dynamically. As a result, fast link adaptation can be achieved for different applications with different rate requirements, to provide higher data rate, reduce connection time, lower power consumption, and improve link quality.

Rate indication and link adaptation for variable data rates in long range wireless networks

A method of period allocation for a medium to be utilized by a first wireless communication device comprising at least one wireless local area network (WLAN) module includes while the first wireless communication device occupies the medium, detecting a termination period of a Network Allocation Vector (NAV) of the medium; and the first wireless communication device extending the termination period of the NAV of the medium if the termination period of the NAV is earlier than an expected period.

Method of period allocation for medium and wireless communication system thereof

A method of managing BSS network loading is proposed. An access point (AP) transmits BSS session time and data limit element in beacon or probe response frame or a response frame to a service request frame. The AP determines the session time and data limit according to the network load and AP resourced. The AP adjusts the session time and data limit dynamically. An STA decides whether to join a specific BSS based on the BSS session time and the BSS session data limit. AP encourages or discourages the STA to join the BSS by increasing or reducing the session time and data limit. The per-AP loading will be distributed according to AP's capabilities.

Basic service set load management

A method of group-based location service is proposed. A wireless station initiates a ranging process with a plurality of wireless communications devices in a wireless local area network. The station belongs to a group of wireless stations. The station exchanges measurement frames with the plurality of wireless communications devices during the ranging process. The station then computes a plurality of distances to each of the plurality of wireless communications devices and thereby determining an absolute location of the station. Finally, the station informs the absolute location to a group owner of the group of wireless stations.

Group based location service in wireless local area networks

A mobile communications device supporting operation on a first wireless technology and a second wireless technology is provided. The device includes a wireless module performing wireless transceiving to and from a first station of a first wireless technology and a second station of a second wireless technology, and a controller module, transmitting a control message prior to the starting of a uplink transmission period of the first wireless technology via the wireless module to occupy the uplink transmission period of the first wireless technology so as to allow transmission of signals of the second wireless technology during the uplink transmission period of the first wireless technology. In operation, the controller module further rearranges the transmission of signals of the second wireless technology to end the transmission of signals of the second wireless technology prior to the starting of a downlink transmission period of the first wireless technology.

Wireless communications devices supporting WiFi and LTE communications and methods for transmission control thereof

A method of handling transmission for a host in a data transmission system includes establishing a connection with a device of the data transmission system via a first frequency; receiving a negotiating information from the device; and re-establishing the connection with the device via a second frequency when the negotiating information reveals that the second frequency is available for the host to communicate with the device; wherein the second frequency is different than the first frequency.

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Tainan, Taiwan

Ching-Hwa Yu