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Method for determining downlink reference signal received power (RSRP) and terminal thereof

A technology for receiving power and reference signals, applied in power management, preventing/detecting errors through diversity reception, wireless communication, etc., can solve problems such as deviation, inability to correctly reflect uplink channel conditions, and large errors, so as to facilitate scheduling, Good uplink power control and the effect of improving system performance

Active Publication Date: 2012-09-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After using MIMO technology, the RSRP measured by the two downlink channels may be deviated due to the difference of the actual channel. If the average value of the two channels is used, it cannot correctly reflect the situation of the uplink channel, especially when the measured values ​​​​of the two channels have a large difference. When is large, the error will be larger

Method used

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  • Method for determining downlink reference signal received power (RSRP) and terminal thereof
  • Method for determining downlink reference signal received power (RSRP) and terminal thereof
  • Method for determining downlink reference signal received power (RSRP) and terminal thereof

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Embodiment Construction

[0027] The present invention is applicable to the situation where MIMO is used in downlink transmission in the LTE system. In general, the MIMO mode is a 2X2 antenna arrangement, and the present invention is also applicable to other MIMO antenna arrangements with multiple single antennas for receiving downlink signals Way.

[0028] like figure 2 As shown, the terminal for determining the received power of the downlink reference signal includes: a single-antenna reference signal received power detection module, an antenna selection module, and a downlink reference signal received power determination module.

[0029] The single-antenna reference signal received power detection module is used to detect the reference signal received power on each single antenna for receiving downlink signals;

[0030] The antenna selection module is configured to determine an uplink antenna for sending uplink data from the single antenna;

[0031] The downlink reference signal received power de...

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Abstract

The invention discloses a method for determining downlink reference signal received power (RSRP) and a terminal thereof. The terminal detects the RSRP on each single antenna used to receive a downlink signal and determines an uplink antenna used to send uplink data from the single antenna. The RSRP detected through the uplink antenna is taken as the downlink RSRP. According to the invention, a measurement channel of the RSRP is selected according to the uplink antenna and the RSRP detected through the uplink antenna is taken as the downlink RSRP so that an actual channel state of the uplink channel can be accurately estimated; uplink power control can be well performed; power headroom report (PHR) can be well reported; accurate terminal information can be provided for a base station; it is convenient for the base station to well schedule and increase system performance.

Description

technical field [0001] The present invention relates to the field of communications, and in particular to determining the received power of a downlink reference signal when using Multiple-Input Multiple-Output (MIMO) technology for downlink communication in a Long Term Evolution (LTE) system A reference signal received power RSRP (Reference Signal Received Power, RSRP for short) method and terminal. Background technique [0002] Compared with the traditional single-input single-output SISO (Single-Input Single-Output, SISO for short) system, the introduction of MIMO technology brings four advantages: array gain, space diversity gain, space multiplexing gain and interference reduction. The MIMO technology is widely used in the LTE system because of its superior performance. When MIMO technology is used in the LTE system, the basic downlink antenna configuration is 2×2 (the configuration of 4×4 will also be considered in the future), that is, two antennas for transmission and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04W52/14
CPCH04B17/0057H04L5/0023H04B7/04H04B17/318
Inventor 田丰
Owner ZTE CORP