US 2007/0183312 A1 · Apparatus and method for allocating radio frequency band resource in space division multiple access system

Abstract

Provided is an apparatus and method for allocating a radio frequency band resource in a Space Division Multiple Access (SDMA) system. The scheduler allocates a data burst, extracts a surplus power resource from each channel band, redistributes the extracted surplus power resource to the data burst, outputs redistributed transmission power information to a power controller, and outputs allocated burst information and the data burst to a modulation block. The power controller receives the transmission power information from the scheduler, and outputs a weight associated with a transmission power. The multiplier receives a frequency domain signal, multiplies the received frequency domain signal by the weight, and outputs the multiplied result to an IFFT operator.

Claims20

Dependent claims

An apparatus for allocating a radio frequency band resource in a Space Division Multiple Access (SDMA) system, the apparatus comprising:

a scheduler for allocating a data burst having one or more channel bands, extracting from each channel band a surplus power resource, redistributing to the data burst the extracted surplus power resource, outputting to a power controller redistributed transmission power information, and outputting to a modulation block allocated burst information and the data burst;
the power controller for receiving from the scheduler the transmission power information on a per-channel-band basis, and outputting to a multiplier a weight associated with a transmission power;
and
the multiplier for receiving from the modulation block a frequency domain signal, multiplying the frequency domain signal received from the power controller by the weight received, and outputting the multiplied result to an Inverse Fast Fourier Transform (IFFT) operator.

1 more element

A method for allocating a radio frequency band resource in a Space Division Multiple Access (SDMA) system, the method comprising the steps of:

allocating data bursts having one or more channel bands;
measuring a Carrier to Interference and Noise Ratio (CINR) of each channel band included in the data burst that is allocated when a transmission power is equally distributed;
measuring a Modulation order Product code Rate (MPR) corresponding to the CINR of each channel band;
equalizing the MPR of each channel band of the data burst to a least MPR among the MPRs of the channel bands in a unit of the allocated data burst, and measuring a surplus power resource resulting from the equalization;
adding the surplus power resources of the data bursts, and calculating a total surplus power resource;
measuring an additional power resource required for an MPR increased by a predetermined level in the data burst unit;
and
determining for redistribution if there exists the data burst that needs an additional power resource less than or equal to the total surplus power resource.

5 more elements

Dependencies are inferred from the claim text.

Apparatus and method for allocating radio frequency band resource in space division multiple access system

Life of this patent

Apparatus and method for allocating radio frequency band resource in space division multiple access system

Life of this patent

Abstract

Claims20