WO2011144064A2 - Terminal mobile et procédé adapté pour réduire un brouillage mutuel dans un terminal mobile - Google Patents

Terminal mobile et procédé adapté pour réduire un brouillage mutuel dans un terminal mobile Download PDF

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Publication number
WO2011144064A2
WO2011144064A2 PCT/CN2011/074520 CN2011074520W WO2011144064A2 WO 2011144064 A2 WO2011144064 A2 WO 2011144064A2 CN 2011074520 W CN2011074520 W CN 2011074520W WO 2011144064 A2 WO2011144064 A2 WO 2011144064A2
Authority
WO
WIPO (PCT)
Prior art keywords
predetermined frequency
mobile communication
communication module
frequency band
dect
Prior art date
Application number
PCT/CN2011/074520
Other languages
English (en)
Chinese (zh)
Other versions
WO2011144064A3 (fr
Inventor
喻志刚
王爱猛
张忠健
张组元
陈伟丛
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to PCT/CN2011/074520 priority Critical patent/WO2011144064A2/fr
Priority to CN201180000999.4A priority patent/CN102246420B/zh
Publication of WO2011144064A2 publication Critical patent/WO2011144064A2/fr
Publication of WO2011144064A3 publication Critical patent/WO2011144064A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a mobile terminal and a method for reducing internal mutuality of the mobile terminal. Background technique
  • the mobile terminals in the prior art are all a user identity module (Subscriber Identity Module, called: SIM) corresponding to a mobile terminal, and there is no application of an extension or a slave, and an effective communication sharing cannot be realized.
  • SIM Subscriber Identity Module
  • the mobile communication module and the fixed part (Fixed Part, referred to as: FP) of the Digital Enhanced Cordless Telecommunications (DECT) may be integrated in the mobile terminal, and moved.
  • the terminal uses the mobile communication module to access the mobile communication network, and uses the DECT FP to establish a communication connection with a plurality of portable parts (PP), so that multiple PPs connected to the DECT FP can pass the SIM in the mobile terminal.
  • the card communicates with the mobile communication network.
  • the Global System of Mobile communication (GSM) system operates in most countries and regions with a frequency band of 900MZ1800M, using frequency division duplex mode. For mobile terminals of the GSM system, its high frequency band is 1800M. The transmitting frequency band is 1710. lM ⁇ 1784.9MHz, and the receiving frequency band is 1805.lM ⁇ 1879.9MHz.
  • DECT PP operates in most countries and regions from 1880.928M to 1890.208MHz, and uses time division duplex mode to transmit and receive the same frequency. This allows the receiving band of the GSM1800 to be adjacent to the operating band of the DECT 1800 without a guard band.
  • the interference signal between the mobile communication module and the DECT cannot be effectively suppressed, and the signal transmitted between the FP and the PP of the DECT will directly enter.
  • the GSM1800 system interferes with its reception of useful signals, causing the mobile communication module receiver to block. Similarly, the mobile communication module transmitting signals will block the DECT FP receiving signals, affecting its normal operation.
  • the embodiments of the present invention provide a mobile terminal and a method for reducing mutual interference of the mobile terminal, which are used to solve the problem of mutual interference between the mobile communication module and the DECT FP in the mobile terminal integrated with the mobile communication module and the DECT FP in the prior art.
  • An embodiment of the present invention provides a mobile terminal, including: a mobile communication module, a fixed portion FP of a digital enhanced cordless telephone system DECT, a main processor, a first filter, and a second filter;
  • the mobile communication module is configured to communicate with a global mobile communication system GSM;
  • the FP operates in a predetermined frequency band for communicating with the portable portion PP of the DECT; the main processor is connected to the mobile communication module and the FP, respectively, for implementing between the FP and the mobile communication module.
  • the first filter is electrically connected to the mobile communication module, and is configured to filter out a DECT signal of the predetermined frequency band received by the mobile communication module;
  • the second filter is electrically connected to the FP of the DECT, and is configured to filter out a noise signal that is sent by the FP in a receiving frequency band of the mobile communication module, and a GSM signal that is received by the FP in the predetermined frequency band. .
  • An embodiment of the present invention provides a method for reducing internal interference of a mobile terminal, including:
  • the mobile terminal and the method for reducing internal mutual interference of the mobile terminal in the embodiment of the present invention by restricting the DECT from operating in a predetermined frequency band, and filtering the DECT of the predetermined frequency band received by the mobile communication module by using the first filter connected to the mobile communication module Signal, filtered by a second filter connected to the FP of the DECT
  • the noise signal in the receiving frequency band of the mobile communication module and the GSM signal in the predetermined frequency band received by the FP are transmitted.
  • the mutual interference between the mobile communication module and the DECT in the mobile terminal is effectively reduced.
  • FIG. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for reducing internal interference of a mobile terminal according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • the mobile terminal includes: a mobile communication module 101, a FP102 of DECT, a main processor 103, a first filter 104, and a second filter. 105.
  • the mobile communication module 101 is configured to communicate with the GSM, and the FP102 of the DECT operates in a predetermined frequency band for communicating with each PP201 of the DECT.
  • the main processor 103 is respectively connected to the mobile communication module 101 and the FP 102 for implementing the FP102 and
  • the communication between the mobile communication module 101, the first filter 104 is electrically connected to the mobile communication module 101, and is used for filtering out the DECT signal in the predetermined frequency band received by the mobile communication module 101, and the second filter 105 and the FP102 of the DECT
  • the electrical connection is used to filter out the noise signals emitted by the FP102 and the PP201 in the receiving frequency band of the mobile communication module 101 and the GSM signals in the predetermined frequency band received by the FP 102.
  • the first filter The device 104 can be electrically connected to the antenna of the mobile communication module 101
  • the second filter 105 can be electrically connected to the antenna of the FP102.
  • the DECT transmitting the noise signal in the receiving frequency band of the mobile communication module 101 can be understood as: Suppose the DECT transmitting signal operates at a frequency of 1890 MHz, and the actual transmitted signal is at 10 MHz, that is, at 1880 M, there is also a signal, of course, this signal Not as big as 1890M. A signal with a small difference between the operating frequency and 1880M can be understood as a noise signal, or it can also be called a spurious signal.
  • the DECT signal is an interaction signal between the FP102 and the PP201.
  • the working frequency band of the DECT signal is the working frequency band specified by the standard organization.
  • a frequency band is selected as a predetermined frequency band in a working frequency band of the DECT signal, and the predetermined frequency band may be from a first predetermined frequency point to a second predetermined frequency point, where the first predetermined frequency point is smaller than the second predetermined frequency point.
  • the first predetermined frequency point needs to be greater than 1880 MHz.
  • the selection of the first predetermined frequency point may be determined according to the size of the guard band. For example, if the guard band is 10 MHz, the first predetermined frequency point may be selected to be 1890 MHz.
  • the second predetermined frequency point may be 1900 MHz or less, preferably 1900 MHz.
  • the passband of the first filter 104 is a signal of a GSM receiving frequency band of 1805 MHz to 1880 MHz
  • the stop band is a signal of a 1890 MHz-1900 MHz transmitted by the DECT.
  • the pass band of the second filter 105 is a signal of 1890MHz-1900MHz in the DECT operating band, and the signals of the 1805MHz-1880MHz and 1705MHz-1880MHz are blocked.
  • the second filter 105 needs to suppress the noise signal falling from 1805MHz to 1880MHz generated by the DECT transmission. When the noise signal is received by the mobile communication module 101, the same frequency interference is generated. In addition, the second filter 105 also needs to suppress the mobile communication module 101 from transmitting signals at 1705 MHz to 1880 MHz. Although this signal is not the DECT operating band, since the signal power is too large, if the receiver front end of the DECT does not have sufficient suppression, This will cause the DECT front-end receiver to saturate.
  • DECT's FP102 and its multiple PP201 operate in a predetermined frequency band.
  • PP201 and FP102 preferably use the highest available intermediate channel frequency in the predetermined frequency band.
  • Channel For example, the predetermined frequency band is 1890MHz to 1900MHz. In this frequency band, the number of available channels is five, and the frequency points are recorded from high to low as channel 0, channel 1, channel 2, channel 3 and channel 4. It should be noted that the channel number and the corresponding specific operating frequency are specified by the standard organization, for example, channel 0 is 1897.344 MHz, and channel 5 is 1888.704 MHz.
  • the FP 102 of the DECT and its plurality of PPs 201 preferably use channel 0.
  • the channel needs to be switched, for example, the signal quality of the current channel is unacceptable or the current channel has interference, the channel needs to be reselected, and the available channels that meet the connection establishment conditions are selected, such as available channels with good signal quality and small interference; or new The user needs to occupy a new channel and needs to apply for a channel again.
  • DECT's FP102 and its multiple PP201s are gradually switched to the lower frequency channel to reduce the influence of system mutual interference.
  • FIG. 2 is a flow chart of a method for reducing internal interference of a mobile terminal according to an embodiment of the present invention.
  • the mobile terminal shown in FIG. 2 may refer to the mobile terminal provided in the foregoing embodiment, and details are not described herein.
  • the method includes:
  • Step 201 PP201 and FP102 negotiate a working channel, that is, establish a connection on channel N; wherein, channel N is an available channel operating in a predetermined frequency band.
  • the initial value of N starts from the value of the signal with the highest frequency in the allowed range.
  • the predetermined frequency band may be from a first predetermined frequency point to a second predetermined frequency point, the first predetermined frequency point being less than the second predetermined frequency point.
  • the first predetermined frequency point In order to ensure that there is a certain guard band between the working frequency band of the DECT and the receiving frequency band of the mobile communication module 101, the first predetermined frequency point needs to be greater than 1880 MHz.
  • the selection of the first predetermined frequency point may be based on the size of the guard band. For example, if the guard band is 10 MHz, the first predetermined frequency point may be selected to be 1890 MHz.
  • the second predetermined frequency point may be 1900 MHz or less, preferably 1900 MHz.
  • the predetermined frequency band is 1890MHz to 1900MHz.
  • the number of available channels is five, and the frequency points are recorded from high to low as channel 0, channel 1, channel 2, channel 3 and channel 4.
  • the channel number and the corresponding specific operating frequency are specified by the standard organization, for example, channel 0 is 1897.344 MHz, and channel 5 is 1888.704 MHz. In this embodiment, channel 0 is preferably used.
  • Step 202 The PP201 and the FP102 determine, according to the environment, whether to establish a connection on the channel N. If yes, establishing a connection on channel N, ending the method;
  • step 203 If no, go to step 203.
  • the determining whether to establish a connection on the N channel according to the environment may include: detecting whether there is interference on the frequency of the channel N, and how the signal quality is equal. If there is interference or the signal quality is not good, the connection is not established on channel N, that is, channel N is an available channel that does not meet the establishment conditions. It should be noted that how to judge the signal quality has specific evaluation criteria specified in the DECT protocol. For details, see ETSI ETR 310 [9], which is not described here.
  • Step 203 The value corresponding to the channel with the highest frequency in the allowed range is used as the number of N, and the step is performed.
  • the DECT operates in a predetermined frequency band, and then filters the DECT signal of the predetermined frequency band received by the mobile communication module through the first filter connected to the mobile communication module, and filters the DECT transmission through the second filter connected to the FP of the DECT.
  • the communication module receives the noise signal in the frequency band and the GSM signal of the predetermined frequency band received by the FP, thereby effectively reducing the mutual interference between the mobile communication module and the DECT in the mobile terminal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

La présente invention se rapporte à un terminal mobile et à un procédé adapté pour réduire un brouillage mutuel dans un terminal mobile. Le terminal selon l'invention comprend : un module de communication mobile, une partie fixe d'un système de télécommunications numériques européennes sans fil (DECT FP), un processeur principal, un premier filtre et un second filtre ; le module de communication mobile communique avec le système mondial de communication avec les mobiles (GSM) ; la FP fonctionne dans une bande de fréquences prédéterminée et communique avec une partie portable d'un système de télécommunications numériques européennes sans fil (DECT PP) ; le processeur principal met en œuvre la communication entre la FP et le module de communication mobile ; le premier filtre permet de filtrer les signaux DECT reçus par le module de communication mobile dans la bande de fréquences prédéterminée ; le second filtre permet de filtrer les signaux de bruit transmis par la FP, les signaux de bruit étant présents dans la bande de fréquences reçue par le module de communication mobile, et de filtrer également les signaux GSM reçus par la FP dans la bande de fréquences prédéterminée.
PCT/CN2011/074520 2011-05-23 2011-05-23 Terminal mobile et procédé adapté pour réduire un brouillage mutuel dans un terminal mobile WO2011144064A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2011/074520 WO2011144064A2 (fr) 2011-05-23 2011-05-23 Terminal mobile et procédé adapté pour réduire un brouillage mutuel dans un terminal mobile
CN201180000999.4A CN102246420B (zh) 2011-05-23 2011-05-23 移动终端及减少移动终端内部互扰的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/074520 WO2011144064A2 (fr) 2011-05-23 2011-05-23 Terminal mobile et procédé adapté pour réduire un brouillage mutuel dans un terminal mobile

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WO2011144064A2 true WO2011144064A2 (fr) 2011-11-24
WO2011144064A3 WO2011144064A3 (fr) 2012-04-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11521223B2 (en) 2012-10-23 2022-12-06 Protolabs, Inc. Automated fabrication price quoting and fabrication ordering for computer-modeled structures

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105307178A (zh) * 2014-07-31 2016-02-03 展讯通信（上海）有限公司 双模双连接终端及其通信方法
EP3316487B1 (fr) * 2015-07-21 2021-03-03 Huawei Technologies Co., Ltd. Procédé et appareil de réduction de brouillage
CN108254764A (zh) * 2018-03-05 2018-07-06 维沃移动通信有限公司 一种抑制蜂窝网络通信对gnss干扰的方法及移动终端

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CN1564570A (zh) * 2004-04-15 2005-01-12 北京汉王科技有限公司 具有固定终端和移动终端的数字无绳双制式电话机
CN101068399A (zh) * 2006-11-22 2007-11-07 中兴通讯股份有限公司 一种td－scdma/phs单天线手机双模双待的实现方法
EP2169840A1 (fr) * 2007-06-13 2010-03-31 Panasonic Corporation Dispositif de communication radio

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Publication number Priority date Publication date Assignee Title
CN1564570A (zh) * 2004-04-15 2005-01-12 北京汉王科技有限公司 具有固定终端和移动终端的数字无绳双制式电话机
CN101068399A (zh) * 2006-11-22 2007-11-07 中兴通讯股份有限公司 一种td－scdma/phs单天线手机双模双待的实现方法
EP2169840A1 (fr) * 2007-06-13 2010-03-31 Panasonic Corporation Dispositif de communication radio

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11521223B2 (en) 2012-10-23 2022-12-06 Protolabs, Inc. Automated fabrication price quoting and fabrication ordering for computer-modeled structures

Also Published As

Publication number Publication date
CN102246420A (zh) 2011-11-16
WO2011144064A3 (fr) 2012-04-26
CN102246420B (zh) 2013-10-02

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