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Method and device for determining time advance

A timing advance and module determination technology, applied to electrical components, synchronization devices, wireless communications, etc., can solve problems such as the calculated timing advance error, and achieve the effect of improving the efficiency and success rate of uplink transmission

Inactive Publication Date: 2012-04-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for determining the timing advance, which is used to solve the problem in the prior art that the error of the calculated timing advance is relatively large when the channel for sending the reference signal is a channel with relatively serious multipath

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  • Method and device for determining time advance
  • Method and device for determining time advance

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Embodiment Construction

[0024] In the embodiment of the present invention, the frequency-domain channel estimation sequence determined according to the reference signal sent by the terminal is converted into a time-domain channel estimation sequence, and the timing advance is determined according to the time-domain channel estimation sequence. Since the frequency-domain channel estimation sequence is converted into a time-domain channel The timing advance is determined after the sequence is estimated, which improves the performance of anti-multipath interference, thereby reducing the error of the determined timing advance when the channel for sending the reference signal is a channel with relatively serious multipath.

[0025] Wherein, the embodiment of the present invention can be applied to the LTE system, and can also be applied to other systems that need to determine the timing advance, such as the LTE-A (Long Term Evolution-Advanced, long-term evolution upgrade) system.

[0026] The embodiments o...

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Abstract

The embodiment of the invention relates to the technical field of wireless communication, in particular to a method and device for determining time advance, aiming to solve the problem that the calculated time advance has larger errors when a channel for sending a reference signal is a channel with a more serious multipath condition in the prior art. The method disclosed by the embodiment of the invention comprises the steps of: converting a frequency domain channel estimation sequence determined according to a reference signal (RS) sent by a terminal into a time domain channel estimation sequence; determining a power value sequence according to the time domain channel estimation sequence; selecting one power value from power values which are more than a shock detection threshold value, from the power value sequence; and determining the time advance according to the selected power value. According to the invention, because the time advance is determined after the frequency domain channel estimation sequence is converted into the time domain channel estimation sequence, the multipath interference resistance is increased, and thus, the errors in determining the time advance are reduced when the channel for sending the reference signal is the channel with the more serious multipath condition.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and equipment for determining timing advance. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, when the UE (terminal) is in the RRC_CONNECTED (radio resource control connected) state, if the UE has uplink data to be sent to the network side, it must also send the corresponding reference signal to receive The terminal uses the reference signal to perform channel estimation, service data equalization, etc. [0003] At the same time, the UE must maintain the synchronization of the uplink to ensure that the uplink transmission data is received "punctually" by the receiving end. One of the keys to maintaining uplink synchronization is that the UE must obtain a timing advance (Timing Advance, TA) related to the distance from itself to the receiving end, which is calculated by the network side and then sent to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00
Inventor 赵伟王双王连友彭振宇尹志新
Owner DATANG MOBILE COMM EQUIP CO LTD
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