Samsung Electronics Co., Ltd.

Seung-Eun Hong

Hong-Sung Chang

Bong-Gee Song

Kwang-Seop Eom

Yeong-Moon Son

Jung-Shin Park

Jae-Jeong Shim

So-Hyun Kim

Hyon-Goo Kang

Geun-Hwi Lim

Yong Chang

Tae-Won Kim

Min-Hee Cho

Seung-Il Yoon

Hyeong-Jong Ju

Jung-Je Son

Chang-Hoi Koo

Hyun-Jeong Kang

Sung-Jin Lee

Jae-Hee Cho

Jung-Won Kim

Hyoung-Kyu Lim

Yun-Sang Park

Gaun-Hwi Lim

Geun-Kwi Lim

A method for allocating a band Adaptive Modulation and Coding (AMC) channel in a wireless communication system that divides a full frequency band into a plurality of subcarrier bands and includes subchannels, each of which is a set of a predetermined number of neighbor subcarrier bands. Upon recognizing a need for a band AMC channel, a subscriber station (SS) sends a request for allocation of the band AMC channel to a base station (BS). Upon receiving the band AMC channel allocation request, the BS determines if it can allocate the band AMC channel requested by the SS, considering a resource situation of the BS, and transmits information on the determination to the SS.

System and method for managing a band AMC subchannel in an orthogonal frequency division multiple access communication system

A method for performing a handover by a subscriber station (SS) in a broadband wireless communication system including a serving base station (BS) communicating with the SS, and at least one neighbor BS neighboring the serving BS. The SS receives downlink signals from the serving BS and the neighbor BS; measures an arrival time difference between the downlink signal received from the serving BS and the downlink signal received from the neighbor BS; and transmits the measured arrival time difference to the serving BS.

Method and apparatus for performing fast handover through fast ranging in a broadband wireless communication system

An apparatus and method for controlling operation states of a medium access control layer by a mobile subscriber station (MSS) in a broadband wireless access communication system. The method includes: state-transitioning into a sleep state or an idle state when there is no data transmitted between a base station and the MSS during a predetermined first time interval in an awake state; and performing a location change in the idle state when the mobile subscriber station moves from a first paging zone to a second paging zone, and state-transiting into the awake state when the mobile subscriber station in the idle state detects a paging to the mobile subscriber station. The method minimizes power consumption and maximizes efficiency in use of radio resources.

System and method for controlling operation states of a medium access control layer in a broadband wireless access communication system

Provided is a method supporting a Hybrid Automatic Repeat Request (HARQ) between a subscriber station and a base station in a broadband wireless access communication system. The method includes transmitting at least one HARQ enabled uplink burst from the subscriber station to the base station; generating ACKnowledgment/Negative ACKnowledgment (ACK/NACK) information according to the received HARQ enabled uplink burst at the base station; mapping the generated ACK/NACK information to a bitmap at the base station; and transmitting the bitmap through a downlink information from the base station to the subscriber station.

Method for operation of HARQ in a broadband wireless access communication system

A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station is provided. The method includes the steps of: mode-transiting into an idle mode when there is no data transmission between the serving base station and the mobile subscriber station during a predetermined first time interval in an awake mode; detecting movement of the mobile subscriber station in the idle mode into another paging zone covering a target base station, which is different from a paging zone covering the serving base station; and mode-transiting into the awake mode and performing location update together with the target base station when the movement of the mobile subscriber station is detected.

System and method for controlling an operational mode of a MAC layer in broadband wireless access communication system

System and method for controlling an operational mode of a MAC layer in a broadband wireless access communication system

A mobile communication system using an orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division multiple access (OFDMA) scheme. The method for assigning ranging codes in the OFDM/OFDMA communication system includes classifying rangings between a base station and a mobile subscriber station (MSS) of the OFDM/OFDMA communication system into an initial ranging, a periodic ranging, a bandwidth request ranging, and a handover ranging. A first number of ranging codes used for the rangings are created and a second number of ranging codes selected from the first number of ranging codes are assigned as handover ranging codes used for the handover ranging.

System and method for ranging for a fast handover in a mobile communication system

Growing community of inventors

Suwon-si, South Korea

Seung-Eun Hong