Samsung Electronics Co., Ltd.

Basha Shaik

Seong-Taek Hwang

Kyung-Woo Lee

Sung-Bum Park

Dae-Kwang Jung

Hong-Seok Shin

Dong-jae Shin

Jeong-seok Choi

Disclosed are an optical signal concentrator and an optical receiver for wireless optical communication. The concentrator includes a diffusion sheet and a light guide plate positioned below the diffusion sheet for guiding diffused optical signals perpendicularly to the incident direction the diffused optical signals, the light guide plate being formed with at least one concentric circle pattern facing the diffusion sheet. The receiver includes an optical signal concentrator including a diffusion sheet, a light guide plate positioned below the diffusion sheet for guiding the optical signals perpendicularly to the incident direction the diffused optical signals, one or more optical detectors for detecting light projected to the side of the light guide plate, and a reflection plate for reflecting light incident to the light guide plate.

Optical signal concentrator and optical receiver using the same

Disclosed is a method of performing softer handover in a broadband wireless communication system. The method includes granting identification numbers to neighbor antennas around a mobile station currently performing communication, and transmitting a neighbor base station advertisement message including the identification numbers of the neighbor antennas, receiving a handover request message including an identification number of a particular antenna from the mobile station, determining if the particular antenna is located within a current coverage area of the base station, and adding the particular antenna to a diversity set and notifying information on multiple antennas included in the diversity set to the base station when the particular antenna is located within the current coverage area of the mobile station; multicasting an identical frame to the multiple antennas included in the diversity set and receiving a handover indication message from the mobile station.

Method for performing softer handover in a broadband wireless communication system

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Suwon-si, South Korea

Basha Shaik