Method and system for automated determination of inter-system border thresholds
First Claim
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1. A method for operating a multi-mode wireless transmit/receive unit (WTRU) comprising:
- receiving signals from both a time division duplex (TDD) and a frequency divisional duplex (FDD) system;
establishing a connection with one of the systems;
measuring a quality of signals received from both the TDD system and the FDD system;
comparing the measured signal quality of the TDD system with a TDD threshold and the measured signal quality of the FDD system with a FDD threshold; and
handing over from a current system in which a connection is established to an other system is the measured signal quality of the current system is below the threshold of the current system and the measured signal quality of the other system is above the threshold of the other system.
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Abstract
A method and system for determining thresholds for evaluating inter-system handovers in a wireless communication system includes determining a quality level of a first digital duplexing type, determining a quality level of a second digital duplexing type, and comparing the quality levels to determine whether to handover from the first digital duplexing type to the second duplexing type.
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Citations
17 Claims
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1. A method for operating a multi-mode wireless transmit/receive unit (WTRU) comprising:
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receiving signals from both a time division duplex (TDD) and a frequency divisional duplex (FDD) system; establishing a connection with one of the systems; measuring a quality of signals received from both the TDD system and the FDD system; comparing the measured signal quality of the TDD system with a TDD threshold and the measured signal quality of the FDD system with a FDD threshold; and handing over from a current system in which a connection is established to an other system is the measured signal quality of the current system is below the threshold of the current system and the measured signal quality of the other system is above the threshold of the other system. - View Dependent Claims (2, 3, 4)
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5. A method for determining thresholds for evaluating inter-system handovers comprising:
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determining an estimated minimum quality level of a first digital duplexing type based on a threshold value for intra-system handover of the first digital duplexing type; setting a first handover threshold to said estimated minimum quality level of the first digital duplexing type; determining an actual quality level of a second digital duplexing type based on information regarding extent of coverage for said second digital duplexing type from a plurality of multi-mode wireless transmit/receive units (WTRUs) comprised in the wireless communication system, said actual quality level representing minimum quality required to sustain communication in second digital duplexing type; setting a reporting threshold to said actual quality level of the second digital duplexing type; determining whether an estimated minimum quality level of the second digital duplexing type, which is based on a threshold value for intra-system handover of the second digital duplexing type, is higher than said actual quality level of a second digital duplexing type; setting a second handover threshold to the reporting threshold when the determination is positive; and setting the second handover threshold to said estimated minimum quality level of the second digital duplexing type when the determination is negative. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification