Base station, mobile terminal, and communications method

Details Base station, mobile terminal, and communications method Base station, mobile terminal, and communications method

2011-07-12

2011-07-12

Pham, Chi H (Department: 2471)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S310000, C370S332000

Reexamination Certificate

active

07978660

ABSTRACT:
A base station, to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, communicates with a mobile terminal according to Time Division Duplex, in which a transmission frame includes a downlink subframe and an uplink subframe. The base station includes multiple antennas; a radio communications part configured to transmit the downlink subframe through a first one of the antennas and to receive an initial ranging code transmitted by the mobile terminal through a second one of the antennas during the transmission of the downlink subframe; and a ranging processing part configured to perform ranging based on the initial ranging code received by the radio communications part.

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IEEE std 802.16e—2005 for Local and metropolitan area networks; Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems; Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1.

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