WO2011143892A1 - Procédé et dispositif d'analyse de brouillage à large bande en liaison montante - Google Patents

Procédé et dispositif d'analyse de brouillage à large bande en liaison montante Download PDF

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Publication number
WO2011143892A1
WO2011143892A1 PCT/CN2010/077686 CN2010077686W WO2011143892A1 WO 2011143892 A1 WO2011143892 A1 WO 2011143892A1 CN 2010077686 W CN2010077686 W CN 2010077686W WO 2011143892 A1 WO2011143892 A1 WO 2011143892A1
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WO
WIPO (PCT)
Prior art keywords
broadband interference
uplink
noise value
subcarrier
noise power
Prior art date
Application number
PCT/CN2010/077686
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English (en)
Chinese (zh)
Inventor
董广明
张玉杰
董志峰
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011143892A1 publication Critical patent/WO2011143892A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/26—Monitoring; Testing of receivers using historical data, averaging values or statistics

Definitions

  • the present invention relates to an Orthogonal Frequency Division Multiple Access (OFDMA) system, and more particularly to an analysis method and apparatus for uplink wideband interference.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • Orthogonal Frequency Division Multiple Access (OFDMA) communication system uses a wideband signal with a bandwidth ranging from 1.5M to 20M. For broadband systems, it is inevitable that there will be broadband interference.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the existence of uplink broadband interference seriously affects the normal service establishment and data transmission of the communication system.
  • the broadband interference signal exists in the time domain.
  • the base station receives the broadband interference signal at the same time.
  • FFT Fast Fourier Transform
  • the interference and the actual needs are in the frequency domain.
  • the data is aliased together, resulting in incorrect data acquisition during demodulation.
  • the analysis method for the uplink broadband interference is to stop the uplink service, and the signal noise power value counted by the base station is the bottom noise value of the system, and then judged according to the noise floor value. Is there any broadband interference?
  • the disadvantage of this method is that all users are removed from the base station and the uplink data service is stopped. Such an operation is prohibited in practical applications. How to analyze the broadband interference of the uplink in the presence of data services has not been a very good and accurate method. Summary of the invention
  • the main object of the present invention is to provide an uplink broadband interference analysis method and apparatus, which can accurately detect uplink broadband interference in the presence of data services without stopping data services. analysis.
  • the present invention provides an uplink broadband interference analysis method, the method comprising: determining an uplink subframe for performing broadband interference analysis;
  • the calculated bottom noise value of the system is compared with the theoretical bottom noise value of the system to obtain the broadband interference of the system.
  • the method further includes:
  • the noise power of each subcarrier occupied by each empty slot in the PUSC zone on each of the subframes is counted.
  • noise power of each subcarrier is counted, specifically:
  • the PowenS w is the noise power of a single subcarrier; the / is the real part of the frequency domain data received from a single subcarrier; the ⁇ is the imaginary part of the frequency domain data received from a single subcarrier.
  • the calculating the average noise power of the subcarriers is specifically:
  • n is the sequence number of the subcarrier, and M is a natural number; then the average noise power of the subcarrier is:
  • bottom noise value of the computing system is specifically:
  • the system is a bottom noise value of the system; and the N is a number of subcarriers included in one frequency domain symbol of the system.
  • the calculated bottom noise value of the system is compared with the theoretical bottom noise value of the system, specifically:
  • the broadband interference of the system is obtained.
  • the broadband interference situation of the system is obtained, specifically: determining a broadband interference condition according to a packet error rate of receiving uplink data and the R 7 « er/ere.
  • the present invention also provides an apparatus for analyzing uplink broadband interference, the apparatus comprising: a pre-processing module, configured to determine an uplink subframe of the broadband interference analysis; and a statistics module, configured to count each of the subframes The noise power of each subcarrier occupied by each empty slot, and calculating the average noise power of the subcarrier; and calculating the bottom noise value of the system according to the average noise power of the subcarrier;
  • the analysis module is configured to compare the calculated bottom noise value of the system with a theoretical bottom noise value of the system to obtain a broadband interference condition of the system.
  • the pre-processing module is further configured to divide the last 3 symbols in the time domain and the 35 sub-channels in the frequency domain into one PUSC zone; and the PUSC All slots contained in the zone are set to empty slots;
  • the statistics module is further configured to perform statistics on noise power of each subcarrier occupied by each empty slot in the PUSC zone on each subframe.
  • the analyzing module is further configured to perform a difference calculation between the calculated bottom noise value of the system and a theoretical bottom noise value of the system, and according to the error packet rate of the received uplink data and the bottom noise value of the system and the system The difference in the theoretical bottom noise value determines the broadband interference situation.
  • the present invention collects the noise power of each subcarrier occupied by each empty slot in the PUSC zone by setting a set of empty slots in the uplink subframe, that is, a PUSC zone, to obtain a bottom noise value of the entire system.
  • slots other than the PUSC zone on the subframe can be used for uplink data transmission; then, according to the calculated difference between the bottom noise value of the system and the theoretical bottom noise value of the system, the broadband in the system can be determined.
  • the interference situation in this way, the present invention can accurately analyze the uplink broadband interference when there is a data service and does not stop the data service.
  • FIG. 1 is a schematic diagram showing the position of an empty slot in a subframe according to the present invention
  • FIG. 2 is a schematic flowchart of an uplink broadband interference analysis method according to the present invention.
  • FIG. 3 is a schematic structural diagram of an apparatus for analyzing uplink broadband interference according to the present invention. detailed description
  • the terminal will only transmit the uplink data on the designated subcarriers, and there will be an empty slot.
  • the slot is the smallest unit of data in the 0FDMA system.
  • one slot occupies 3 symbols in the time domain.
  • One subchannel is occupied in the frequency domain, and one subchannel contains 72 subcarriers.
  • Waves 24 are pilot subcarriers and 48 are data subcarriers).
  • the uplink data is not sent on the empty slot
  • the RF receiving device on the network side receives the uplink data
  • the power of the noise signal of each subcarrier (referred to as noise power) is counted, and the system noise floor value (Rssi) of the entire bandwidth can be obtained to determine whether there is broadband interference.
  • Step 201 Determine an uplink subframe of the broadband interference analysis.
  • the number of statistical subframes can be determined as needed, and the number of subcarriers is M subframes x2520.
  • the present invention may further perform the step 202 of wideband interference according to the above determined statistical period, and set the PUSC zone based on each subframe.
  • the present invention sets an empty slot set, that is, a partial subchannel area (PUSC zone) on each statistical subframe.
  • PUSC zone a partial subchannel area
  • one subframe is in time.
  • the domain occupies 15 symbols, occupies 35 subchannels in the frequency domain, and divides the last 3 symbols and 35 subchannels of one subframe in the time domain into PUSC zones.
  • the PUSC zone contains 35 slots, each slot. Occupying 72 subcarriers, in the present invention, all 35 slots are set to empty slots, that is, the PUSC zone in which one subframe is set does not transmit uplink data; All other slots on the subframe can be used for the transmission of uplink data.
  • the 35 empty slots included in the PUSC zone do not have a corresponding modulation and coding mode, and the value of the corresponding modulation and coding mode of each empty slot is 0.
  • Step 203 Count the noise power of each subcarrier occupied by each empty slot.
  • an empty slot occupies 72 subcarriers, and the present invention counts the noise power of each subcarrier occupied by each empty slot.
  • the noise power is calculated based on the frequency domain data of each subcarrier, and includes two parts of real (I) and imaginary (Q) data, wherein: the radio receiving device on the network side receives data from a certain subcarrier of an empty slot.
  • a 32-bit frequency domain data is obtained, including a 16-bit real part (I) and a 16-bit imaginary part (Q).
  • the imaginary part represents the phase of the sub-carrier, and the real and imaginary parts represent the values. The amplitude of this subcarrier.
  • This method is used to track each empty slot in the PUSC zone in each sub-segment. For an empty slot, the noise power of 72 sub-carriers needs to be counted. The noise power of M sub-carriers needs to be calculated.
  • Step 204 Calculate an average noise power of the subcarriers. Accumulating the noise power of the counted M subcarriers, Where n is the sequence number of the subcarrier, M is a natural number, and then divided by the number M of subcarriers, the average noise power of the subcarriers, that is, the noise floor value of each subcarrier is obtained:
  • Step 205 Calculate a bottom noise value of the system.
  • Step 206 comparing the calculated bottom noise value of the system with a theoretical bottom noise value of the system, Get the broadband interference of the system.
  • the invention obtains the broadband interference condition according to the error packet rate of receiving the uplink data and the value of the Rssilnterfere, and classifies the bandwidth interference situation, for example, the broadband interference condition is divided into eight levels: 1. When R 7 « er / ere ⁇ 10 When it is considered that there is no broadband interference, it will not affect normal data services;
  • the present invention can accurately analyze the broadband interference of the uplink.
  • the broadband interference situation can be more accurately classified according to the error packet rate of receiving the uplink data and the value of the Rssilnterfere.
  • the present invention provides a device for broadband interference analysis, as shown in FIG. 3, including:
  • the pre-processing module 10 is configured to determine an uplink subframe of the broadband interference analysis, and the statistics module 20 is configured to calculate a noise power of each sub-carrier occupied by each empty slot in each subframe, and calculate an average of the sub-carriers. Noise power; is also used to calculate the bottom noise value of the system based on the average noise power of the subcarriers;
  • the analysis module 30 is configured to compare the calculated bottom noise value of the system with the theoretical bottom noise value of the system to obtain a broadband interference condition of the system.
  • the pre-processing module 10 is further configured to divide the last 3 symbols of each subframe in the time domain and the 35 subchannels in the frequency domain into one PUSC zone; and set all the slots included in the PUSC zone to an empty slot. , no uplink data is sent;
  • the statistics module 20 is further configured to perform statistics on the noise power of each subcarrier occupied by each empty slot in the PUSC zone on each subframe.
  • the analyzing module 30 is further configured to perform a difference calculation between the calculated bottom noise value of the system and the theoretical bottom noise value of the system, and according to the error packet rate of the received uplink data and the bottom noise value of the system and the theoretical bottom noise value of the system.
  • the difference is determined by the broadband interference situation.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un procédé d'analyse de brouillage à large bande en liaison montante, qui consiste à : déterminer les sous-trames de liaison montante pour une analyse de brouillage à large bande ; collecter des statistiques de puissance de bruit de chaque sous-porteuse occupée par chaque créneau temporel vide sur chaque sous-trame, et compter une puissance de bruit moyenne des sous-porteuses ; compter la valeur plancher de bruit du système conformément à la puissance de bruit moyenne des sous-porteuses ; comparer la valeur plancher de bruit du système comptée à la valeur plancher de bruit théorique du système et obtenir la circonstance de brouillage à large bande du système. La présente invention porte également sur un dispositif d'analyse de brouillage à large bande en liaison montante. Par la présente invention, une analyse précise de brouillage à large bande en liaison montante peut être mise en œuvre pendant que le service de données existe et sans l'arrêter.
PCT/CN2010/077686 2010-05-20 2010-10-12 Procédé et dispositif d'analyse de brouillage à large bande en liaison montante WO2011143892A1 (fr)

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CN201010179899.X 2010-05-20
CN201010179899.XA CN102255833B (zh) 2010-05-20 2010-05-20 一种上行链路宽带干扰的分析方法和装置

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CN102421123B (zh) * 2011-11-30 2014-07-30 合肥东芯通信股份有限公司 一种lte系统中检测邻区带宽的方法和装置
CN105519019B (zh) * 2013-05-27 2017-07-21 华为技术有限公司 一种检测干扰信号的方法及装置
CN105517169B (zh) * 2014-09-26 2019-05-17 成都鼎桥通信技术有限公司 一种用于规避干扰的调度方法
CN112543507B (zh) * 2019-09-23 2022-09-13 成都鼎桥通信技术有限公司 基于上行干扰的载波选择方法、装置、基站及存储介质
CN111447020B (zh) * 2020-06-05 2021-10-29 国网信息通信产业集团有限公司 应用于电力无线专网的干扰处理方法及系统
CN114189297B (zh) * 2021-11-23 2024-05-28 上海移为通信技术股份有限公司 无线通信设备及其干扰检测方法
CN114726410B (zh) * 2022-03-07 2022-09-30 山东大学 一种适用于多天线通信感知一体化的非均匀波束空间调制方法及系统

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CN1650543A (zh) * 2002-03-26 2005-08-03 英特尔公司 在多信道接收机中选择权值的方法
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KR20090034552A (ko) * 2007-10-04 2009-04-08 삼성전자주식회사 광대역 무선통신 시스템에서 상향링크 간섭 제어 단말 선택방법 및 장치
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