WO2011106966A1 - 一种电话线及gsm网络接入系统 - Google Patents

一种电话线及gsm网络接入系统 Download PDF

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Publication number
WO2011106966A1
WO2011106966A1 PCT/CN2010/075933 CN2010075933W WO2011106966A1 WO 2011106966 A1 WO2011106966 A1 WO 2011106966A1 CN 2010075933 W CN2010075933 W CN 2010075933W WO 2011106966 A1 WO2011106966 A1 WO 2011106966A1
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Prior art keywords
line
gsm
telephone
positive
negative
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PCT/CN2010/075933
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English (en)
French (fr)
Inventor
刘团辉
周毅
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中兴通讯股份有限公司
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Publication of WO2011106966A1 publication Critical patent/WO2011106966A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]

Definitions

  • the present invention relates to the field of Global System for Mobile Communications (GSM), and more particularly to a telephone line and a GSM network access system.
  • GSM Global System for Mobile Communications
  • the GSM network has become one of the most popular wireless communication methods.
  • Many GSM terminal products such as handsets, fixed stations and access terminals, have been derived from the GSM network, but these products must be considered in the design process.
  • the GSM network itself has a Time Division Multiple Access (TDMA) communication mode, and the time division multiplexing (TDD) noise generated by the time division multiplexing communication mode interferes with the terminal equipment or other electronic products. It is very obvious. For example, put a mobile phone next to the TV. When the phone rings or receives a text message, the screen of the TV will appear image jitter, and the speaker of the TV will also have a "beep" sound. This interference is the GSM network. TDD noise.
  • the reason for the TDD noise is that the Power Amplify (PA) in the RF transmitter module of the mobile phone generates a transmission signal every 1/216.8 seconds, which contains 900MHz/l 800MHz or 1900MHz 2.0G GSM signal.
  • the envelope of the PA the click heard by the user, is the envelope noise emitted by the PA when it generates the transmitted signal.
  • the human ear's hearing frequency ranges from 20 Hz to 20 kHz
  • the 216.8 Hz sound is within the audible range of the human ear.
  • the audio codec to the line between the headphones is designed to make the noise have a chance to break in, the user will hear such noise.
  • 217Hz is a GSM-specific phenomenon.
  • the GSM data is 4.615 milliseconds per frame period, of which 4.615 milliseconds are equally divided into 8 timings, and the GSM mobile phone transmits RF signals in one of the timings. This signal is a high-frequency signal.
  • the phone's motherboard is full of GSM (including Digital Cellular System (DCS)) RF signals.
  • GSM including Digital Cellular System (DCS)
  • DCS Digital Cellular System
  • RF signals are collected by a microphone (MICROPHONE), converted into a sound signal and transmitted out. It becomes a burst noise (BUSRT NOISE); if it is received by the speaker (SPEAKER), it will detect the sound BURST signal.
  • the existing methods for eliminating TDD noise generally adopt a method of improving the source of the disturbance, that is, adding a filter circuit to the motherboard of the mobile phone and shielding the motherboard.
  • the GSM voice gateway is a GSM network product that can connect to a GSM network with its fixed line connected via a telephone line. Since the GSM network uses airborne radiation, even if the main board of the GSM gateway is filtered and shielded, there is no guarantee that the TDD noise generated by the GSM gateway itself will not interfere with the voice signal transmitted on the telephone line. Therefore, users who use the landline will still hear noise.
  • the technical problem to be solved by the present invention is to provide a telephone line and a GSM network access system to overcome the interference of TDD noise on voice signals.
  • the present invention provides a telephone line for connecting a Global System for Mobile Communications (GSM) gateway and a fixed telephone; the telephone line includes a positive (TIP) line and a negative (RING) line, and the positive and negative lines are external Covered by the shield.
  • GSM Global System for Mobile Communications
  • RING negative
  • the fact that the outer side of the positive electrode line and the negative electrode line are covered by the shield means that the positive electrode line and the negative electrode line are located inside the same shield.
  • the outer portions of the positive and negative lines are covered by the shield means that the positive and negative lines are respectively located inside different shields.
  • the present invention also provides a GSM network access system, comprising: a fixed telephone, a GSM gateway, and a telephone line connecting the fixed telephone and the GSM gateway, and the telephone line passes through the RJ11 plug and the The RJ11 jack at the corresponding position on the GSM gateway cooperates; the telephone line includes a positive (TIP) line and a negative (RING) line, and includes two shields.
  • TIP positive
  • RING negative
  • a wire, each shield wire is connected to an idle pin on the RJ11 plug; in the RJ11 jack, a pin corresponding to the two idle pin positions connected to the shield wire is grounded.
  • One of the two shielded wires is connected to the pin 1 on the RJ11 plug, and the other is connected to the pin 4 on the RJ11 plug.
  • One of the two shielded wires is wrapped around the positive line and the other is wrapped around the negative line.
  • the interference of the TDD noise on the coupled path can be cut off, the GSM TDD noise is effectively reduced, and the sound quality of the terminal call is well guaranteed.
  • FIG. 1 is a structural diagram of a GSM network access system according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a telephone line according to an embodiment of the present invention.
  • the telephone line provided by the invention is used for connecting a GSM gateway and a fixed telephone, wherein the telephone line includes a positive line (ie, a TIP line) and a negative line (ie, a RING line), and the outer side of the positive line and the negative line are covered by a shield.
  • a shield ensures that the analog signals transmitted on the TIP line and the RING line are not coupled to the TDD noise transmitted over the air. Therefore, the TDD noise is not interfered with the voice signal on the transmission path, which reduces the user's listening. The possibility of noise to TDD.
  • the outer surface of the positive electrode line and the negative electrode line are covered by the shielding body in two ways: Method 1: The positive electrode line and the negative electrode line are located inside the same shielding body, and the shielding body can be used to wrap the positive and negative lines. Together; Method 2: The positive and negative lines are covered by different shields, ie different screens are used The cover body wraps the positive and negative lines, respectively.
  • the present invention also provides a GSM network access system, which includes: a fixed telephone, a GSM gateway, and a telephone line connecting the two, and the telephone line passes through the RJ11 plug (ie, the crystal head) and the GSM gateway.
  • the telephone line includes a positive line (ie, TIP line) and a negative line (ie, RING line), and also includes two shielded lines, each of which is idle with the above RJ11 plug
  • the pins are connected; in the above RJ11 jack, the pins corresponding to the above two idle pin positions connected to the shield line are grounded.
  • the RJ11 plug Pins 2 and 3 are still connected to the positive and negative lines, respectively, to transmit analog signals.
  • one shielded wire is wrapped outside the positive line and the other shielded wire is wrapped outside the negative line, as shown in FIG.
  • the present invention deviates from the conventional idea of processing only the device, and improves the signal transmission path, thereby achieving the purpose of improving the audio quality.
  • the invention can cut off the interference of TDD noise on the coupling path, effectively reduce the GSM TDD noise, and ensure the sound quality of the terminal call is well guaranteed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

一种电话线，用于连接全球移动通讯系统（GSM）网关和固定电话话机，该电话线包括正极（TIP）线和负极（RING）线，且所述正极线和负极线外部被屏蔽体所覆盖。本发明还提供了一种全球移动通讯系统（GSM）网络接入系统，其包括：固定电话话机、GSM网关及连接所述固定电话话机与所述GSM网关的电话线，且所述电话线通过其上RJ11插头与所述GSM网关上相应位置的RJ11插孔相配合。本发明可切断TDD噪声在耦合路径上的干扰，有效地降低了GSMTDD噪声，使终端通话音质得到了良好的保证。

Description

一种电话线及 GSM网^ ~入系统
技术领域 本发明 涉及全球移动通讯系 统 （ Global System for Mobile Communications , GSM )领域 , 尤其涉及一种电话线及 GSM网络接入系统。
背景技术
目前， GSM网络已成为全 艮普遍的无线通讯方式之一， 从 GSM网络 也衍生出很多 GSM终端产品， 如手持机、 固定台和接入终端等， 但是这些 产品在设计过程中都要考虑到 GSM网络本身时分多址接入 ( Time Division Multiple Access , TDMA )的通讯模式， 由于时分复用的通讯模式产生的时分 复用 （ Time Division Duplexing, TDD )噪声对终端设备或其它电子产品产生 的干扰是十分明显的。 比如， 在电视机旁边放一部手机， 在手机振铃或收到 短信时， 电视机的屏幕会出现图像抖动， 同时电视机的喇叭也会出现 "嗡嗡" 的声音， 这个干扰就是 GSM网络的 TDD噪声。 产生 TDD 噪声的原因是手机射频发射模块中的功率放大器 （Power Amplify, PA ) 每 1/216.8 秒会产生一个发射信号， 在该发射信号中包含 900MHz/l 800MHz 或是 1900MHz 的 2.0G GSM信号以及 PA 的包络线 ( envelope ) , 用户所听到的嗡嗡声就是 PA在产生发射讯号时发出的包络线 ( envelope )杂音。 因为人耳的听觉频率范围为 20Hz~20KHz, 因此 216.8Hz 的声音在人耳可听到的范围内。 当音频编解码器 （audio codec )到耳机之间 的线路因为设计不良而让噪声有机会窜入的话， 用户便会听到诸如此类的杂 音。
217Hz是 GSM特有的现象， GSM数据每一帧周期为 4.615毫秒， 其中 这 4.615毫秒被等分为 8个时序， GSM手机在其中一个时序发出射频信号。 这个信号是高频信号， 辐射到手机主板上后， 手机主板上就充满了 GSM (包 括数字蜂窝系统（Digital Cellular System, DCS ) )射频信号。 这些射频信号 被麦克风（MICROPHONE )釆集到后， 转换为声音信号并发射出去， 就形 成了突发噪声 （BUSRT NOISE ) ； 若被扬声器 （ SPEAKER )接收到， 则会 检波出声音 BURST信号。 现有的消除 TDD噪声的方法， 一般都釆取对骚扰源进行改善的方式， 即在手机主板上增加滤波电路和对主板进行屏蔽两种方法。 GSM语音网关是一种 GSM网络产品， 可以将与其通过电话线连接的固 定电话接入到 GSM网络中。 由于 GSM网络釆用空中辐射的方式， 因此即使 对 GSM网关的主板进行滤波和屏蔽都无法保证 GSM网关自身产生的 TDD 噪声不会干扰到电话线上传输的语音信号。 因此， 使用该固定电话的用户仍 然会听到噪声。
发明内容 本发明要解决的技术问题是提供一种电话线及 GSM 网络接入系统， 以 克服 TDD噪声对语音信号的干扰。 本发明提供了一种电话线， 用于连接全球移动通讯系统（GSM ) 网关和 固定电话话机； 该电话线包括正极 ( TIP ) 线和负极（RING )线， 且所述正极线和负极 线外部被屏蔽体所覆盖。 所述正极线和负极线外部被屏蔽体所覆盖是指： 所述正极线和负极线位于同一屏蔽体内部。 所述正极线和负极线外部被屏蔽体所覆盖是指： 所述正极线和负极线分别位于不同的屏蔽体内部。
本发明还提供了一种 GSM网络接入系统， 包括： 固定电话话机、 GSM 网关及连接所述固定电话话机与所述 GSM 网关的电话线， 且所述电话线通 过其上 RJ11插头与所述 GSM网关上相应位置的 RJ11插孔相配合； 所述电话线中包括正极（TIP ) 线和负极（RING )线， 还包括两根屏蔽 线， 每一根屏蔽线与所述 RJ11插头上的一个空闲针脚相连； 在所述 RJ11插 孔中， 与上述两个与屏蔽线相连的空闲针脚位置对应的针脚接地。 所述两根屏蔽线中， 一根与所述 RJ11插头上的针脚 1相连， 另外一根 与所述 RJ11插头上的针脚 4相连。 所述两根屏蔽线中， 一根包裹于所述正极线外， 另外一根包裹于负极线 夕卜。
釆用本发明后， 可切断 TDD噪声在耦合路径上的干扰， 有效地降低了 GSM TDD噪声， 使终端通话音质得到了良好的保证。
附图概述 图 1 为本发明实施例中 GSM网络接入系统的结构图； 图 2为本发明实施例中电话线的结构示意图。
本发明的较佳实施方式 下面将结合附图及实施例对本发明的技术方案进行更详细的说明。 本发明提供的电话线用于连接 GSM 网关和固定电话话机， 该电话线中 包括正极线（即 TIP线）和负极线（即 RING线） ， 且该正极线和负极线外 部被屏蔽体所覆盖。 该屏蔽体的存在保证了 TIP线和 RING线上传输的模拟 信号不会被空中传输的 TDD噪声耦合到， 因此， 在传输路径上保证了 TDD 噪声不会对语音信号进行干扰， 降低了用户听到 TDD噪声的可能性。 进一步地， 上述正极线和负极线外部被屏蔽体所覆盖可通过以下两种方 式实现： 方式一： 正极线和负极线位于同一屏蔽体内部， 即可使用一屏蔽体将正 负极线包裹在一起； 方式二： 正极线和负极线分别被不同的屏蔽体所覆盖， 即使用不同的屏 蔽体分别对正极线和负极线进行包裹。 此外， 本发明还提供了一种 GSM 网络接入系统， 其中包括： 固定电话 话机、 GSM网关及连接上述二者的电话线，且电话线通过其上 RJ11插头（即 水晶头）与 GSM网关上相应位置的 RJ11插孔相配合； 该电话线中包括正极 线（即 TIP线）和负极线 (即 RING线） ， 还包括两根屏蔽线， 每一根屏蔽 线与上述 RJ11插头上的一个空闲针脚相连； 在上述 RJ11插孔中， 与上述两 个与屏蔽线相连的空闲针脚位置对应的针脚接地。 如图 1所示， 为了兼容现有固定电话话机的接口， 将一根屏蔽线与 RJ11 插头上的针脚 1相连， 将另外一根屏蔽线与 RJ11插头上的针脚 4相连， 则 RJ11插头上的针脚 2和 3依然分别与正极线和负极线相连，以传输模拟信号。 且在实际布线时， 尽量使得屏蔽线靠近正极线和负极线的差分线位置。 优选 地， 将一根屏蔽线包裹于正极线外， 将另一根屏蔽线包裹于负极线外， 如图 2所示。
综上所述， 本发明是从传统的只对设备进行处理的思路上脱离出来， 对 信号的传播途径进行改善， 从而达到提高音频质量的目的。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性 本发明可切断 TDD噪声在耦合路径上的干扰，有效地降低了 GSM TDD 噪声， 使终端通话音质得到了良好的保证。

Claims

权 利 要 求 书
1、 一种电话线， 用于连接全球移动通讯系统（GSM ) 网关和固定电话 话机， 该电话线包括正极（ TIP ) 线和负极（ RING )线， 且所述正极线和负 极线外部被屏蔽体所覆盖。
2、 如权利要求 1所述的电话线， 其中： 所述正极线和负极线外部被屏蔽体所覆盖是指： 所述正极线和负极线位于同一屏蔽体内部。
3、 如权利要求 1所述的电话线， 其中： 所述正极线和负极线外部被屏蔽体所覆盖是指： 所述正极线和负极线分别位于不同的屏蔽体内部。
4、 一种全球移动通讯系统（GSM ) 网络接入系统， 其包括： 固定电话话机、 GSM网关及连接所述固定电话话机与所述 GSM网关的 电话线， 且所述电话线通过其上 RJ11 插头与所述 GSM 网关上相应位置的 RJ11插孔相配合； 其中： 所述电话线包括正极（TIP )线和负极（RING )线， 还包括两根屏蔽线， 每一根屏蔽线与所述 RJ11插头上的一个空闲针脚相连；在所述 RJ11插孔中， 与上述两个与屏蔽线相连的空闲针脚位置对应的针脚接地。
5、 如权利要求 4所述的接入系统， 其中： 所述两根屏蔽线中， 一根与所述 RJ11插头上的针脚 1相连， 另外一根 与所述 RJ11插头上的针脚 4相连。
6、 如权利要求 4或 5所述的接入系统， 其中： 所述两根屏蔽线中， 一根包裹于所述正极线外， 另外一根包裹于负极线 夕卜。
PCT/CN2010/075933 2010-03-05 2010-08-12 一种电话线及gsm网络接入系统 WO2011106966A1 (zh)

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CN101777403A (zh) * 2010-03-05 2010-07-14 中兴通讯股份有限公司 一种电话线及gsm网络接入系统

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CN110417997A (zh) * 2019-07-26 2019-11-05 青岛海信移动通信技术股份有限公司 一种降低tdd噪声的方法、装置及移动终端

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