Method and apparatus for selecting carriers
First Claim
1. A method of selecting carriers to be measured by a subscriber unit served by a cellular communication system and having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
- Dynamically determining a frequency of measurements updates when measuring carriers in the frequency band;
wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and
Dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit.
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Accused Products
Abstract
This invention relates to a method and apparatus for selecting carriers to be measured by a subscriber unit (301,303, 501). The subscriber unit (301, 303, 501) is served by a communication system and is operable to measure carriers in a frequency band, which typically belongs to a different communication system. The apparatus comprises a performance processor (329) for determining a measuring performance characteristic of the subscriber unit (301, 303, 501) related to the measurement performance of the subscriber unit (301, 303, 501) when measuring in the frequency band. The apparatus furthermore comprises a carrier subset selector (331) for selecting a subset of carriers in the frequency band to be measured by the subscriber unit. The subset of carriers is selected dependent on the measuring performance characteristic. The invention is applicable to dual 2nd and 3rd generation cellular communication systems such as GSM/UMTS.
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Citations
31 Claims
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1. A method of selecting carriers to be measured by a subscriber unit served by a cellular communication system and having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
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Dynamically determining a frequency of measurements updates when measuring carriers in the frequency band;
wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; andDynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for selecting carriers to be measured by a subscriber unit served by a cellular communication system and having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
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Means for dynamically determining a frequency of measurements updates when measuring carriers in the frequency band;
wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; andMeans for dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A subscriber unit for selecting carriers to be measured by a subscriber unit served by a cellular communication system and having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
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means for dynamically determining a frequency of measurements updates when measuring carriers in the frequency band;
wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; andmeans for dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification