Method and apparatus for compensating signal timing measurements for differences in signal frequencies
First Claim
1. A method of compensating timing measurement values obtained in a wireless communication network having multiple carriers operating at different carrier frequencies, said method implemented in a single first node configured for operation in the wireless communication network and comprising:
- obtaining, by the single first node, a first timing measurement value for a first radio signal transmitted by the single first node at a first carrier frequency to a single second node;
obtaining, by the single first node, a second timing measurement value for a second radio signal transmitted by the single first node at a second carrier frequency to the single second node, the second radio signal being associated with the first radio signal;
determining, by the single first node, whether timing compensation is needed for either or both of the first timing measurement value or the second timing measurement value, based at least in part, on an association with an emergency call and a frequency distance between the first carrier frequency and the second carrier frequency;
responsive to determining that timing compensation is needed, deriving, by the single first node, a compensation value based on frequency-dependent propagation differences between the first carrier frequency and the second carrier frequency, wherein adjusting either or both of the first timing measurement value or the second timing measurement value using the compensation value substantially accounts for the frequency-dependent propagation differences; and
providing, by the single first node to the single second node or other node configured for operation in the wireless communication network, the compensation value for use in compensating either or both of the first timing measurement value or the second timing measurement value when used in processing by the single second node or the other node dependent on either or both of the first timing measurement value or the second timing measurement value.
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Accused Products
Abstract
Methods (100) and apparatuses (12, 24, 38) taught herein advantageously facilitate use of timing measurements in wireless communication networks (10) where radio signal timing measurements involve signals at different carrier frequencies. The methods and apparatuses in particular compensate such timing measurements for expected discrepancies in the measurements that arise from frequency-dependent differences in the propagation behavior of the radio signals being measured. In a non-limiting example, measurements at two or more frequencies may be compensated for the frequency distance between those frequencies, or with respect to a reference frequency. In such cases, timing measurements determined for one or more other radio signals are compensated as a function of the frequency distance between the reference frequency and the frequencies of such other radio signals.
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Citations
31 Claims
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1. A method of compensating timing measurement values obtained in a wireless communication network having multiple carriers operating at different carrier frequencies, said method implemented in a single first node configured for operation in the wireless communication network and comprising:
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obtaining, by the single first node, a first timing measurement value for a first radio signal transmitted by the single first node at a first carrier frequency to a single second node; obtaining, by the single first node, a second timing measurement value for a second radio signal transmitted by the single first node at a second carrier frequency to the single second node, the second radio signal being associated with the first radio signal; determining, by the single first node, whether timing compensation is needed for either or both of the first timing measurement value or the second timing measurement value, based at least in part, on an association with an emergency call and a frequency distance between the first carrier frequency and the second carrier frequency; responsive to determining that timing compensation is needed, deriving, by the single first node, a compensation value based on frequency-dependent propagation differences between the first carrier frequency and the second carrier frequency, wherein adjusting either or both of the first timing measurement value or the second timing measurement value using the compensation value substantially accounts for the frequency-dependent propagation differences; and providing, by the single first node to the single second node or other node configured for operation in the wireless communication network, the compensation value for use in compensating either or both of the first timing measurement value or the second timing measurement value when used in processing by the single second node or the other node dependent on either or both of the first timing measurement value or the second timing measurement value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31)
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16. A single first node configured for operation in a wireless communication network having multiple carriers operating at different carrier frequencies, said single first node comprising:
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a communication interface configured for communicating with one or more other nodes within the wireless communication network; and one or more processing circuits; at least one memory including computer program code, the memory and the computer program code configured to, working with the processor, cause the node to; obtain a first timing measurement value for a first radio signal transmitted from the single first node at a first carrier frequency to a single second node; obtain a second timing measurement value for a second radio signal transmitted from the single first node at a second carrier frequency to the single second node, the second radio signal being associated with the first radio signal; determine whether timing compensation is needed for either or both of the first timing measurement value or the second timing measurement value, based at least in part, on an association with an emergency call and a frequency distance between the first carrier frequency and the second carrier frequency; derive a compensation value to provide the timing compensation, the compensation value based on frequency-dependent propagation differences between the first and second carrier frequencies of the first radio signal and second radio signal transmitted from the single first node to the single second node or one or more other nodes in the network, where adjusting either or both of the first timing measurement value or the second timing measurement value using the compensation value substantially accounts for the frequency-dependent propagation differences; and provide the compensation value to the single second node or another of the one or more other nodes for use in compensating either or both of the first timing measurement value or the second timing measurement value when used in processing dependent on said either or both of the first timing measurement value or the second timing measurement value. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification