Silicon Integrated Systems Corporation

Mediatek Corporation

Hsien-Chun Huang

Ching-Kae Tzou

Shang-Ho Tsai

Wei-Gian Chen

A wireless device includes a scheduler, arranged for setting a packet de-queue scheduling of a packet queue device having packets of a plurality of groups which are queued therein. Each of the plurality of groups includes at least one wireless communications client. The scheduler includes an information acquisition circuit, an airtime controller and a scheduling controller. The information acquisition circuit is arranged to obtain an airtime utilization or a throughput utilization of at least one group of a plurality of groups. The airtime controller is arranged to assign a plurality of airtime quota settings to the plurality of groups based on the airtime utilization or the throughput utilization of the at least one group of the plurality of groups. The scheduling controller is arranged to set the packet de-queue scheduling according to at least the airtime quota settings.

Wireless device and method for setting packet de-queue scheduling of packet queue device based on airtime quota allocation

A method and an apparatus are provided in this invention to select an optimal swapping technique in discrete multi-tone system. The algorithm for performing gain-swapping is also proposed in the present invention. A swapping technique is selected from gain-swapping and a combination of bit-swapping and gain-swapping based on two index values such that the difference between the maximum mean square error (MSE) and the minimum mean square error (MSE) is minimized and the gain factor constraints are met. The first index value I is representative of range of improvement when adopting the gain-swapping as the swapping technique, and the second index value J is representative of range of improvement when adopting a combination of the gain-swapping and the bit-swapping as the swapping technique.

Method and apparatus for selecting an optimal swapping technique in discrete multi-tone system

An apparatus is adapted for interleaving an incoming stream of data blocks, each of which has a predetermined number (N) of block units indexed consecutively from 0 to (N&minus;1), The interleaving is accomplished at a predetermined interleaving depth (D). A first one of the block units has no delay associated therewith, and subsequent ones of the block units in a designated one of the data blocks have a delay equal to (D&minus;1) more than an immediately preceding one of the block units in the designated one of the data blocks. The apparatus includes a data buffer configured to have a number of lines equal to (N&minus;1), an output unit, and a control unit. Each of the lines has a size sufficient to accommodate a predetermined number of the block units. The output unit outputs one of the block units of the incoming stream directly when the delay associated therewith is equal to zero. When the delay associated with one of the block units of the incoming stream is not equal to zero, the control unit generates a reading index for reading one of the block units stored in the data buffer, controls the output unit to output the block unit read from the data buffer, generates a writing index, and stores the block unit of the incoming stream in the respective one of the lines of the data buffer in accordance with the writing index. A method for interleaving the same is also disclosed.

Growing community of inventors

Hsinchu, Taiwan

Hsien-Chun Huang