Realtek Semiconductor Inc.

Shau-Yu Cheng

Wen-Yung Lee

Chun-Kai Tseng

Jhe-Yi Lin

Wei-Hsuan Chang

Ying-Dar Lin

Wei-Chi Lai

Terng-Yin Hsu

Tsung-Chun Cheng

Chia-Yu Ku

Cheng-Yuan Lee

Cheng-Deom Hasio

Ting-Chen Wei

Yu-Shan Liang

Jyun-Jhe Jheng

Zh-Hong Xiao

A wireless communication method, applied to a wireless communication device to decide uplink parameters, comprising: (a) determining which one of candidate stations can be at least one target station which can perform uplink transmissions to the wireless communication device; (b) calculating a number of the target station; (c) allocating at least one RU (Resource Unit) to the target station according to the number and pre-recorded reference allocation information, to generate the uplink parameters comprising RU allocation parameters; and (d) generating a trigger frame comprising the uplink parameters and transmitting the trigger frame to the target station.

Wireless communication method and wireless communication device

A content channel generation device comprises a resource unit assignment circuit, for assigning scheduled station(s) as node(s) of a full binary tree according to a search algorithm; a node computing circuit, for determining first node connection information of the full binary tree, and to determine second node connection information of a smallest full binary tree according to a smallest binary tree algorithm and the first node connection information; a load balance circuit, for determining user field numbers corresponding to content channels according to a load balance function and the second node connection information; a user field generation circuit, for generating a traversal result of the smallest full binary tree according to a traversal algorithm and the second node connection information, and for generating user fields corresponding to the content channels according to the traversal result, to generate the content channels.

Device and method of performing content channel generation

A wireless transmission method includes obtaining an MCS (modulation and coding scheme) rate and a power amplifier gain of each station in a set of stations for a multi-user (MU) transmission, generating a maximum available MCS rate according to a plurality of MCS rates of the set of stations, selecting a power amplifier gain of the MU transmission according to the maximum available MCS rate, adjusting a digital gain of each station according to the power amplifier gain of the MU transmission and the power amplifier gain of each station, adjusting a frequency domain signal of each station according to the digital gain thereof, converting a plurality of adjusted frequency domain signals of the set of stations into a time domain signal, and generating an amplified signal for the MU transmission according to the power amplifier gain of the MU transmission and the time-domain signal.

Wireless transmission method for enhancing efficiency of transmit power control of multi-user transmission, and wireless communication device utilizing the same

The present disclosure discloses a dynamic transmission bandwidth allocation method having dynamic transmission bandwidth allocation mechanism used in a wireless communication apparatus is provided that includes the steps outlined below. Interference information and transmission ability information of remote wireless communication apparatuses is retrieved. A predetermined transmission bandwidth range that includes resource units is set. The remote wireless communication apparatuses are allocated in the predetermined transmission bandwidth range to generate an allocation result. Whether the allocation result satisfies resource unit allocation criteria is determined. When the allocation result does not satisfy the resource unit allocation criteria, the predetermined transmission bandwidth range is shrunk to another allocatable transmission bandwidth range to determine whether the allocation result satisfies the resource unit allocation criteria. When the allocation result satisfies the resource unit allocation criteria, the remote wireless communication apparatuses are allocated according to the allocation result to perform communication thereto through a communication circuit.

Wireless communication apparatus having dynamic transmission bandwidth allocation mechanism and dynamic transmission bandwidth allocation method thereof

A wireless communication method for optimizing uplink transmission from a communication partner to a wireless communication device includes the following steps: after receiving an uplink performance estimation, determining uplink adjustment information including resource unit allocation and a target received signal strength indicator according to the uplink performance estimation; generating a target channel quality indicator (CQI) according to previous uplink sounding information and the uplink adjustment information, wherein the previous uplink sounding information indicates the characteristics of the uplink transmission; determining uplink transmission setting including a modulation and coding scheme and dual carrier modulation according to the target CQI and the type of an error correction technique and transmitting a control signal to a communication partner according to the uplink transmission setting; and updating the uplink performance estimation according to a reception signal from the communication partner, wherein the characteristic of the reception signal is affected by the uplink transmission setting.

Wireless communication device and method

The present invention discloses a wireless communication apparatus having memory sharing mechanism that includes a communication circuit, a memory circuit and a processing circuit. The processing circuit performs the steps outlined below. Remote wireless communication apparatuses are connected to perform channel detection and communication thereon by a communication circuit. Compressed channel state information (CSI) generated by the remote wireless communication apparatuses is received by the communication circuit. The compressed CSI is stored in the memory circuit. Raw CSI is generated according to a status of the wireless channel. When a remaining capacity of the memory circuit is not sufficient, a number of the remote wireless communication apparatuses that the communication circuit performs the channel detection thereon is decreased and the corresponding compressed CSI stored in the memory circuit is removed. The raw CSI is stored in the memory circuit.

Wireless communication apparatus having memory sharing mechanism and memory sharing method of the same

A communication device includes a radio transceiver and a processor. The radio transceiver is configured to transmit or receive wireless signals and includes a collision detection device. The collision detection device is configured to detect energy in a wireless communication channel during a first time interval before a packet is transmitted by the radio transceiver and accordingly generate a detection result. The first time interval covers a period of time for the radio transceiver to switch from a receiving state to a transmitting state. The processor is configured to adjust at least one transmission parameter according to the detection result.

Methods for adjusting transmission parameters and communication device utilizing the same

A first communication device for handling a transmission based on spatial reuse comprises at least one storage device; and at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores instructions, and the at least one processing circuit is configured to execute the instructions of: detecting a reception power level of a first packet transmitted in a channel by a second communication device; determining a minimum downward adjustment value according to the reception power level; determining a maximum downward adjustment value according to a reference transmission power level; and determining whether to transmit a second packet to a third communication device in the channel according to the minimum downward adjustment value and the maximum downward adjustment value.

Device and method of handling a transmission based on spatial reuse

A MIMO detection method for a receiver in a MIMO system using N-QAM for modulation, the MIMO detection method including generating a plurality of symbol vector sets and a plurality of search radiuses, selecting a candidate symbol vector set corresponding to a highest level of a multilevel structure of N-QAM constellation, generating a search space corresponding to a lower level of the multilevel structure of N-QAM constellation according to the selected candidate symbol vector set, confirming which level the search space corresponds to, and generating a detection signal according to the search space when the level of the search space is the lowest level of the multilevel structure of the N-QAM constellation.

Multilevel cluster-based MIMO detection method and MIMO detector thereof

A channel utilizing method for a wireless network is adapted for channel utilization by a switch node having a number (N) of transceivers in an environment with a number (M) of channels, wherein (N)&#x3c;(M). The channel utilizing method includes the steps of: calculating a channel weight set, and selecting one of the (M) channels according to the channel weight set; determining a notify mechanism according to a relation between the switch node and a neighbor node; using the notify mechanism to notify the neighbor node of a current state of the switch node; and calculating a channel stay-in period, and causing the switch node to stay in the selected one of the channels for a duration of the channel stay-in period. A channel utilizing system is also disclosed.

Growing community of inventors

Hsinchu, Taiwan

Shau-Yu Cheng