US 2004/0203418 A1 · `Adaptive orthogonal channel noise source

Abstract

A method of adapting the Orthogonal Channel Noise Source (OCNS) for optimization and acceptance testing of a CDMA based wireless network under load conditions is disclosed. According to an embodiment of the invention, a test loading level (for example, 80%) and performance requirements are established for a plurality of Base-station Transceiver Subsystems (BTS). The subsystems then transmit any required overhead power plus sufficient OCNS power such that the total output level of the BTS power amplifier is at the selected test level (e.g. 80%). As a mobile unit moves within range of a BTS and requests access, the unit's power requirement is determined based on the requested data rate. The OCNS power level of the new BTS is then adjusted or lowered by an amount equal to the detected power requirements to allow access to the mobile unit. The BTS then establishes a communication link with the mobile unit. Thus, the total power output of the tower under test is maintained at a pre-selected level such as for example 80%.

Claims17

Dependent claims

A method of testing a wireless communication system comprising the steps of:

selecting a test loading level for a BTS (“Base-station Transceiver Subsystem”) power output, said selected loading level including an OCNS (Orthogonal Channel Noise Source) portion and a portion representing the power requirements of connected mobile units;
determining the power requirements of a selected mobile unit;
adjusting said OCNS portion of said BTS power output by an amount equal to said determined power requirements of said selected mobile unit;
and
establishing a communication link between said BTS and said selected mobile unit such that said selected test loading level is maintained.

2 more elements

A method of testing a wireless communication system comprising a multiplicity of BTS units spaced over an area and each BTS unit providing a pattern of coverage, said method comprising the steps of:

selecting a test loading level for the power output of each one of said multiplicity of BTS units, said selected loading level of each BTS unit including an OCNS (Orthogonal Channel Noise Source) portion and a portion representing the power requirements of connected mobile units;
establishing a communication link between a first one of said multiplicity of BTS units and a selected mobile unit located within the pattern of coverage of said first one of said multiplicity;
transmitting data between said selected mobile unit and said first one of said multiplicity;
moving said selected mobile unit into the pattern of coverage of a second one of said multiplicity of BTS units;
determining the power requirements of said selected mobile unit;
adjusting said OCNS portion of said power output of said second one of said multiplicity of BTS units by an amount equal to said determined power requirements of said selected mobile unit;
and
establishing a communication link between said selected mobile unit and said second one of said multiplicity of said BTS unit and said second one of said multiplicity of said BTS units such that said selected test loading level is maintained.

5 more elements

Dependencies are inferred from the claim text.

`Adaptive orthogonal channel noise source

Life of this patent

`Adaptive orthogonal channel noise source

Life of this patent

Abstract

Claims17