Wilus Institute of Standards and Technology Inc.

Humax Networks, Inc.

Mando Corporation

Kiwon Kang

Jinsam Kwak

Juhyung Son

Bonho Koo

In Wook Jeon

Provided is a base wireless communication terminal. The base wireless communication terminal includes a transceiver and a processor. The processor is configured to transmit a mixed Physical Layer Protocol Data Unit (PPDU) including both data for a Long Range (LR) wireless communication terminal and data for a non-LR wireless communication terminal to the LR wireless communication terminal and the non-LR wireless communication terminal using the transceiver. The LR PPDU including only the data for the LR wireless communication terminal has a narrower bandwidth than a bandwidth of the non-LR PPDU including only the data for the non-LR wireless communication terminal.

Method for wireless communication with wireless communication terminal for long distance transmission and wireless communication terminal using same

Provided is a base wireless communication terminal that communicates with a Long Range (LR) wireless communication terminal supporting LR wireless communication. The base wireless communication terminal includes a transceiver and a processor. The processor is configured to set length information included in a non-LR preamble, which is a preamble for a non-LR wireless communication terminal that does not support LR wireless communication, to be longer than a length from a predetermined point in a Physical layer Protocol Data Unit (PPDU) to an end point of the PPDU, and transmits the PPDU including the non-LR preamble to the LR wireless communication terminal using the transceiver. In this case, the length information is information for indicating a length from a predetermined point in the PPDU to an end point of the PPDU.

Method for wireless communication with wireless communication terminal for long range transmission and wireless communication terminal using same

A check valve provided in a bore of a modulator block having inlet and outlet passages comprises a valve housing having an upper portion and a seat portion formed with a lower portion of the valve housing and having inlet and outlet ports communicating with the inlet and outlet passages, respectively; a cap sealing the upper portion of the valve housing and secured to the modulator block; a plunger movable up and down in the valve housing to open and close an internal flow passage between the inlet and outlet ports; an elastic member provided between the cap and the plunger and elastically pressing the plunger against the seat portion; a sealing member installed on the plunger; and an anti-jamming member provided between the sealing member and a contact surface to prevent the sealing member from being caught in the contact surface between the plunger and the seat portion.

Check valve

Disclosed herein is a check valve. The check valve includes a valve housing having upper and lower ends opened and having an inlet formed along the circumference of the valve housing, the inlet linked to a inlet fluid path, an upper cap coupled to seal up an open upper portion of the valve housing, a lower holder coupled to an open lower portion of the valve housing, having an outlet formed along the circumference of the lower holder, the outlet linked to a outlet fluid path, and having a guide hole in the lower portion of the lower holder, and a plunger installed to move up or down to selectively open or close an orifice while elastically supported by an elastic member supported by the lower holder, wherein the plunger comprises guides at upper and lower ends of the plunger to guide the plunger to make stable linear motion.

Growing community of inventors

Gyeonggi-do, South Korea

Kiwon Kang