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Method for sending signal to inform measurement for location in wireless network

A network and wireless technology, applied in the field of radio network nodes, to achieve the effect of improving positioning quality and cheap expansion

Active Publication Date: 2016-11-09
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TOA requires accurate time synchronization, and is actually less accurate than TDOA, but both methods require measurements from at least three sites

Method used

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  • Method for sending signal to inform measurement for location in wireless network
  • Method for sending signal to inform measurement for location in wireless network
  • Method for sending signal to inform measurement for location in wireless network

Examples

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Embodiment Construction

[0042] As part of this solution, the problem will first be identified and discussed. As mentioned above, the positioning method that will be used in LTE has not been specified, but it is reasonable to assume that some existing positioning techniques used in the previous generation will also be suitable for LTE, and some signal measurements will be used to define user Location. Two measurement candidates in existing standards that are both already used in UMTS are:

[0043] ●Synchronization signal (SS) SINR;

[0044] • Reference Signal (RS) SINR (defined as RSRQ in LTE).

[0045] Signals used for positioning measurements (synchronization, cell-specific reference signals, dedicated positioning references, etc.), also called reference signals, are always transmitted on predefined resource symbols, which makes them interfere with the same signals from other cells when the network is synchronized / interfered with by these signals. In an asynchronous mode of operation, synchroni...

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Abstract

The invention provides a method for assisting location of user equipment (120) based on time measurement in a signal device (150). The signal device is associated with an s cell (160). The s cell (160) is identified as the s cell with limited functionality by a first network node (110). Therefore, for the user equipment (120), the s cell cannot be taken as a candidate cell which is used for serving the user equipment (120) and transmitting data. The s cell associated with the signal device is contained in a location neighbor list of a neighbor cell. The user equipment can carry out time measurement on the neighbor cells in the list, thereby facilitating location. The signal device is configured for transmitting a predefined reference signal according to a predefinition mode correlated to a pre-selected time slot and a pre-selected sub-carrier in a predefined sub-frame. The signal device obtains sync information. The signal device transmits the reference signal according to configuration. When the s cell associated with the signal device is contained in the location neighbor list, the user equipment can receive the transmitted reference signal and carry out time measurement on the transmitted reference signal for location.

Description

technical field [0001] The invention relates to a radio network node and a method in a radio network node. The invention also relates to a signaling device and a method in a signaling device. Specifically, it relates to assisted positioning of user equipment based on time measurements. Background technique [0002] In a typical cellular system (also called a wireless communication network), wireless terminals (also called mobile stations and / or user equipment units (UE)) communicate via a radio access network (RAN) with one or more core networks. Wireless terminals may be mobile stations or user equipment units, such as mobile telephones (also called "cellular" telephones), and laptops with wireless capabilities (e.g. Portable, pocket, hand-held, computer-containing or vehicle-mounted mobile device for voice and / or data communication. [0003] A radio access network covers a geographical area divided into cell areas, where each cell area is served by a base station, such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
CPCH04W64/00
Inventor I.西奥米纳A.坎加斯
Owner TELEFON AB LM ERICSSON (PUBL)
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