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Inter-frequency measurement for observing time difference of arrival

A technology of time difference and different frequency, applied in the direction of electrical components, wireless communication, etc., can solve the problems of wasting system resources and not being able to configure necessary measurement gaps as required

Active Publication Date: 2016-11-30
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0069] According to the current Release 9 standard, it is impossible for the serving cell to know that the E-SMLC has requested the UE to perform inter-frequency RSTD measurements for OTDOA positioning, so the eNB controlling the serving cell cannot configure the necessary measurement gaps as required to enable the UE to perform the requested measurements
The eNB controlling the serving cell is thus forced to configure measurement gaps all the time, which wastes system resources

Method used

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  • Inter-frequency measurement for observing time difference of arrival
  • Inter-frequency measurement for observing time difference of arrival
  • Inter-frequency measurement for observing time difference of arrival

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Embodiment Construction

[0085] Note that the aforementioned problem does not arise in e.g. WCDMA systems, since the cells are statically configured to generate a predetermined pattern of idle periods in the downlink during which the UE can measure without interference from the serving cell away from the cell, or tune its receiver to another frequency for measurement purposes. Furthermore, the pilot channels decoded for performing measurements are also always available for UE decoding. However, this conventional approach will be transformed into requiring the eNB to configure measurement gaps specifically for inter-frequency measurement for all UEs in an LTE environment.

[0086] Another solution based on quadrature reference signals related to the near-far problem at the same frequency is defined. However, this solution is incompatible with inter-frequency measurements regardless of whether the UE is performing inter-frequency OTDOA measurements.

[0087] Therefore, even if the inter-frequency OTDO...

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Abstract

Methods, systems and computer programs for performing mobile node measurements. In one method there are the steps of: receiving at a mobile user node from a location server a request to perform an inter-frequency reference signal time difference measurement; receiving a measurement gap configuration from a serving access node; performing the requested inter-frequency difference during the allocated measurement gap. measuring the time difference of the inter-frequency reference signal; and reporting the result of the time difference measurement of the inter-frequency reference signal to the location server.

Description

technical field [0001] The exemplary, non-limiting embodiments of the present invention relate generally to wireless communication systems, methods, apparatus and computer programs and more particularly to observed time difference of arrival techniques for positioning mobile nodes. Background technique [0002] This section is intended to provide a background or context to the invention that is recited in the claims. The description herein may include concepts that may be claimed, but not necessarily have been previously conceived, implemented or described. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section. [0003] The following abbreviations that may be found in the specification and / or in the drawings are defined as follows: [0004] 3GPP Third Generation Partnership Project [0005] BS base station [0006] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/10H04W64/00
Inventor K·M·朗塔-阿奥M·斯雅加拉简
Owner NOKIA TECH OY