WO2008071076A1 - Système relais à hyperfréquences numériques et procédé d'application - Google Patents

Système relais à hyperfréquences numériques et procédé d'application Download PDF

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Publication number
WO2008071076A1
WO2008071076A1 PCT/CN2007/003516 CN2007003516W WO2008071076A1 WO 2008071076 A1 WO2008071076 A1 WO 2008071076A1 CN 2007003516 W CN2007003516 W CN 2007003516W WO 2008071076 A1 WO2008071076 A1 WO 2008071076A1
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Prior art keywords
module
microwave relay
frequency division
division duplex
demodulation
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PCT/CN2007/003516
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English (en)
French (fr)
Inventor
Qin Zhu
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Comba Telecom Technology (Guangzhou) Ltd.
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Application filed by Comba Telecom Technology (Guangzhou) Ltd. filed Critical Comba Telecom Technology (Guangzhou) Ltd.
Publication of WO2008071076A1 publication Critical patent/WO2008071076A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Definitions

  • the invention relates to digital microwave communication technology, in particular to a digital microwave relay communication system and an implementation method thereof.
  • the traditional digital microwave transmission system is composed of frequency division duplex (FDD) point-to-point microwave equipment.
  • Each link in the relay communication system is a pair of FDD point-to-point microwave equipment, usually called "one hop". "Microwave equipment.
  • a microwave relay link (Aa as shown in Figure 1) consists of a hop microwave device.
  • the receiving carrier operates at the P terminal of the high FDD segment, and the transmitting carrier operates at the lower segment of the FDD.
  • the N-end is that the receiving carrier operates in the lower part of the FDD, and the transmitting carrier operates in the upper part of the FDD, which is represented by lowercase letters in the following description.
  • An Aa radio relay link shown in Figure 1 the A-end station receives the carrier operating at the high frequency point fah, and the transmitting carrier operates at the low frequency fah.
  • the a-end station is opposite to the A-end station, and the receiving carrier works.
  • the fal carrier transmitted from the A station is received; a.
  • the end station transmits the carrier to operate at the high frequency fah, and the A station receives the fah carrier from the a station.
  • the microwave relay communication in the FDD band recommended by the International Telecommunication Union (ITU) is composed of a plurality of point-to-point links, and each relay station except the end station includes two end devices.
  • the second site in Figure 1 one is the end station a of the A-a link, and the other is the end station b of the B-b link.
  • the end device used in the link end station of the existing relay communication system is shown in FIG. 2, and each station in the system is composed of two sets of end devices shown in FIG. 2, which can be seen from FIG. Mainly composed of baseband interface, time division multiplexing (TDM) multiplexing module, time division multiplexing (TDM) tapping module, modulation module, demodulation module, outdoor unit (ODU), business interface, monitoring module, etc.
  • TDM time division multiplexing
  • TDM time division multiplexing
  • TDM time division multiplexing
  • OFD outdoor unit
  • business interface monitoring module
  • the ODU unit modules of the two sets of end devices need to be separately set and used independently in the respective devices, and the structure and the action mode make the cost of the device high.
  • the connection relationship is relatively complicated; and its implementation method is relatively complicated in processing the signal, and the efficiency is not ideal.
  • the object of the present invention is to overcome the shortcomings of the prior art and provide a digital microwave relay communication system with reasonable structure, low cost, simple installation and maintenance. Another object of the present invention is to provide an implementation method of the above digital radio relay communication device.
  • the object of the present invention is achieved by the following technical solutions: A digital microwave relay communication system, wherein a relay station of each link is composed of a frequency division duplex microwave relay device, and the frequency division duplex microwave relay device includes connected Baseband interface, time division multiplexing multiplexing module, time division multiplexing tapping module, modulation module, demodulation module, outdoor unit module, business interface, monitoring module and cross connection module, etc., characterized in that: each relay The frequency division duplex microwave relay equipment of the station is a set of frequency division duplex two-way microwave relay equipment.
  • the frequency division duplex bidirectional microwave relay device comprises a cross connection module; the number of the demultiplexing modules in time and multiplexed tapping modules is two, and the two time division multiplexing tapping modules are simultaneously connected to the
  • the cross-connect module and the outdoor unit module are connected to the baseband interface.
  • the cross-connection of the present invention is a function that the conventional point-to-point relay device does not have. When a conventional point-to-point relay device needs to implement this requirement, multiple sets of digital microwave transmission equipment and separately provided cross-connect equipment are required to realize two-way relay communication. The structure and connection relationship are complex and the cost is relatively high.
  • the modulation module and the demodulation module of the frequency division duplex bidirectional microwave relay device are controlled by the monitoring module, and the required frequency is set in conjunction with the outdoor unit module.
  • the two demodulation modules and the two time division multiplex tap modules are connected to the cross-connect module.
  • a method for implementing a digital microwave relay communication system characterized in that: using the cross-connect module in the frequency division duplex bidirectional microwave relay device, two demodulated and demultiplexed signals are selected to send a partial baseband to be sent to the interface. Interface, and the signal that needs to be sent to the other direction is sent to the time division multiplexing multiplexing module for multiplexing and modulation, and is sent to the other direction; each station except the end station is two The same carrier is transmitted in both directions, and two carriers from both directions are received.
  • the two demodulation modules of the relay device timely multiplex the tapping module and receive the official service after the cross-connect module; since the system of the present invention sends the same carrier to two directions So, as long as the corresponding direction is indicated on the corresponding fields in the two directions to be sent.
  • the choice of the direction of the official data and voice of the present invention shows a significant advantage over the intra-hop jumper link of the conventional point-to-point relay device.
  • the jumper network management route link sends the same carrier to two directions. It can be realized only by corresponding recognition when receiving.
  • the invention can simplify the IP routing table and improve the efficiency of network management data transmission.
  • the principle of action of the present invention is:
  • the system of the present invention operates in the FDD frequency band designated by the ITU, and is compatible with FDD point-to-point equipment by using FDD frequency band resources; the end equipment of each station adds one demodulation to the structure of the existing microwave relay equipment.
  • tapping the unit, and setting the cross-connect module, the ODU can be shared by each relay station by using the local device, and the added cross-connection is to select the two-way demodulated and tapped signal to send the part that needs to be sent.
  • Baseband interface, and the signal that needs to be sent to the other direction is sent to the TDM multiplexing and modulation to be sent to the other direction; the present invention transmits the same direction in both directions except for the end station.
  • Carrier, and receiving two carriers from two directions realize the function that can be realized by using two sets of end devices for each end station, but the direction of the official data and voice of the present invention is more than that of the traditional point-to-point relay device.
  • the internal jumper link shows obvious advantages; the traditional point-to-point relay device jumper link is usually established between two link devices. Then, while the use of the present invention device to the two directions is the same set of equipment, no additional physical connections; the two directions is sent to the same carrier, only indicated in the corresponding direction can be accessed.
  • the monitoring data transmission of the present invention shows a significant advantage over the intra-site jumper of the conventional point-to-point relay device in terms of network management routing.
  • the traditional point-to-point relay device jumps the network management route link to establish a connection between the two link devices, and the information sent to the two devices by the device of the present invention is in the same device, and physical connection is not required.
  • the two carriers are sent to the same carrier, and only need to be identified when receiving.
  • the present invention has the following advantages and effects: (1) The structure is reasonable and the cost is low; The technical solution requires only one set of equipment at each station to complete the functions of the two ends of the equipment required for the existing relay. Compared with the prior art, the digital microwave relay communication device has a significantly simplified structure. For a microwave relay link, the number of devices used in the patented device is only about n/2+l of the conventional solution, so the equipment cost is large. Declining, the economic benefits are obvious. (2) Easy installation and maintenance; This equipment only needs to install one set of equipment at each site, so the installation operation is relatively simple, the failure rate is also reduced accordingly, and its maintenance is relatively easy and convenient. (3) The effect is good; the direction selection of the official data and voice of the present invention has obvious advantages over the prior art; and the monitoring data transmission is better in the network management routing than the existing equipment. Better used to replace existing product use. DRAWINGS
  • FIG. 1 is a schematic diagram of a link of a conventional point-to-point microwave relay communication system.
  • FIG. 2 is a schematic structural view of an end device used in the point-to-point microwave relay communication system shown in FIG. 1.
  • 3 is a schematic structural view of an end device used in the digital microwave relay communication system of the present invention.
  • 4 is a schematic diagram of a link of a digital microwave relay communication system of the present invention.
  • the end device used in the digital microwave relay communication system includes a connected baseband interface, a time division multiplexing multiplexing module, a time division multiplexing tap module, a modulation module, a demodulation module, an outdoor unit module, a service interface, and a monitoring module; and a cross-connect module; the number of the demultiplexing modules in time and multiplexed is two, and the two demodulation modules are timely
  • the sub-multiplexer tapping modules are connected in parallel, and both ends thereof are simultaneously connected to the outdoor unit and the cross-connect module, and the cross-connect module is connected to the baseband interface.
  • the modulation module and the demodulation module are set under the control of the monitoring module to match the required frequency with the outdoor unit module.
  • the digital microwave relay communication system adopts only one set of end equipment at each relay station to realize the microwave wireless relay transmission effect, and the implementation method thereof is as shown in FIG. 4, and the crossover in the frequency division duplex bidirectional microwave relay device is utilized.
  • the connection module selects two demodulated and demultiplexed signals to select a part of the baseband interface to be sent to the interface, and separates the signals that need to be sent to the other direction into the time division multiplexing multiplexing module for multiplexing, Modulation, to send to the other direction; each station except the end station transmits the same carrier in both directions, and receives two carriers from both directions, realizing the use with each existing end station
  • the service link processing when the service link processing is skipped, the same carrier is sent to two directions, and the direction is indicated on the corresponding field.
  • the choice of the direction of the official data and voice of the present invention shows a significant advantage over the in-site jumper service link of the conventional point-to-point relay device.
  • the jumper network management route link when the network manages data, the jumper network management route link sends the same carrier to two directions, and only needs to be identified when receiving.
  • the invention can simplify the IP routing table and improve the efficiency of network management data transmission.

Description

数字微波接力通信系统及其实现方法 技术领域
本发明涉及数字微波通信技术， 特别涉及一种数字微波接力通信系统 及其实现方法。
背景技术
传统的数字微波传输系统由频分双工 （FDD) 的点到点微波设备构成， 其接力通信系统中的每段链路都是一对 FDD的点到点微波设备，通常称作 "一跳"微波设备。一个微波接力链路（如图 1所示的 A-a) 由一跳微波设 备构成， 其接收载波工作在 FDD高段的 P端， 而发送载波工作在 FDD的 低段， 为表述方便， 我们在以下描述时用大写字母表示； 那么 N端就是接 收载波工作在 FDD低段， 而发送载波工作在 FDD的高段， 在以下描述时 用小写字母表示。 一个图 1所示的 A-a微波接力链路， 其 A端站接收载波 工作在高段的频点 fah， 发送载波工作在低段的频点 fah 其 a端站与 A端 站相反， 接收载波工作在低段的频点 fal， 接收来自 A端站发的 fal载波； a 端站发送载波工作在高段的频点 fah， A端站接收来自 a端站发的 fah载波。 在国际电信联盟 （ITU) 建议的 FDD频段的微波接力通信是由多个点到点 链路构成， 除末端的站点以外的每个接力站点包括两个端设备。 例如图 1 中的第二个站点， 一个是 A-a链路的端站 a， 另一个是 B-b链路的端站 b。 其中， 现有接力通信系统链路端站采用的端设备如图 2所示， 系统中的每 个站点都是由两套图 2所示的端设备构成的， 由图 2可见， 这种端设备主 要由基带接口、 时分多路复用 （TDM) 复接模块、 时分多路复用 （TDM) 分接模块、 调制模块、 解调模块、 室外单元 （ODU)、 公务接口、 监控模块 等连接构成； 在利用这种传统端设备的接力站中，两套端设备的 ODU单元 模块都需单独设置并在各自设备中独立使用的， 这样的结构形式及作用方 式就使得其设备的成本较高， 连接关系相对复杂； 而且其实现方法对信号 的处理过程亦相对繁复， 效率不够理想。
发明内容
本发明的目的在于克服现有技术的缺点， 提供一种结构合理、 成本较 低、 安装维护简单方便的数字微波接力通信系统。 本发明的另一目的在于提供上述数字微波接力通信设备的实现方法。 本发明的目的通过下述技术方案实现： 一种数字微波接力通信系统， 其每段链路的接力站点由频分双工微波接力设备构成， 所述频分双工微波 接力设备包括相连接的基带接口、 时分多路复用复接模块、 时分多路复用 分接模块、 调制模块、 解调模块、 室外单元模块、 公务接口、 监控模块和 交叉连接模块等， 其特征在于： 每个接力站点的频分双工微波接力设备为 一套频分双工双向微波接力设备。
所述频分双工双向微波接力设备包括交叉连接模块； 所述解调模块及 时分多路复用分接模块的数量分别为两个， 两个时分多路复用分接模块同 时连接于所述交叉连接模块及室外单元模块， 所述交叉连接模块与基带接 口相连接。 本发明所述交叉连接是传统的点对点接力设备本身不具有的功 能， 传统的点对点接力设备要实现这一要求时， 需要多套数字微波传输设 备以及另外设置的交叉连接设备才能实现双向的接力通信， 结构及连接关 系复杂， 成本比较高。
本频分双工双向微波接力设备的调制模块、 解调模块在监控模块的控 制下， 配合室外单元模块设置所需频率。
所述两个解调模块及两个时分多路复用分接模块并接到交叉连接模 块。
一种数字微波接力通信系统的实现方法， 其特征在于： 利用本频分双 工双向微波接力设备中的交叉连接模块将两路解调经分接后的信号选择出 需要送接口的部分送基带接口， 而将需要发往另一方向的信号分出送入时 分多路复用复接模块进行复接、 调制， 以发向另一方向； 在除了末端站以 外的每个站点都是向两个方向发送同一个载波， 而接收来自两个方向的两 个载波。
在跳接公务链接处理时， 接力设备的两个解调模块及时分多路复用分 接模块并接到交叉连接模块之后的公务； 由于本发明的系统是将同一个载 波发往两个方向， 这样只要在发往的两个方向相应的字段上同时标示出相 应的方向即可实现。 使本发明的公务数据和语音的方向选择比传统的点对 点接力设备的站点内跳接公务链接显示出明显的优势。
在网络管理数据时，跳接网管路由链接是将同一个载波发往两个方向， 仅需在接收时作相应的识别即可实现。 利用本发明可简化 IP路由表， 提高 网络管理数据传输效率。
本发明的作用原理是： 本发明系统工作在 ITU指定的 FDD频段， 用 FDD频段资源，与 FDD点对点设备兼容；每个站点的端设备是在现有的微 波接力设备的结构中增加一路解调、 分接单元， 并设置交叉连接模块， 利 用本端设备在每个接力站可共用 ODU， 所增加的交叉连接是为了将两路解 调经分接后的信号选择出需要送接口的部分送基带接口， 而将需要发往另 一方向的信号分出送入 TDM复接、调制， 以发向另一方向； 本发明在除了 末端站以外的每个站点都是向两个方向发送同一个载波， 而接收来自两个 方向的两个载波， 实现与现有每个端站采用两套端设备才能实现的功能， 但本发明的公务数据和语音的方向选择比传统的点对点接力设备的站点内 跳接公务链接显示出明显的优势； 传统的点对点接力设备跳接公务链接通 常要在两个链路设备之间建立连接， 而采用本发明的设备发往两个方向的 是同一套设备， 物理上不需要另外连接； 而发往两个方向是同一个载波， 仅需在相应的字段上标示方向即可。 此外， 本发明的监控数据传输在网管 路由选择方面比传统的点对点接力设备的站点内跳接显示出明显的优势。 传统的点对点接力设备跳接网管路由链接通常要在两个链路设备之间建立 连接， 而采用本发明的设备发往两个方向的信息是在同一套设备， 物理上 不需要另外连接。 而发往两个方向是同一个载波， 仅需在接收时作相应的 识别即可。
本发明相对于现有技术具有如下的优点及效果： （1 ) 结构合理、 成本 较低； 本技术方案在每个站点仅需要一套设备完成现有接力所需的两端设 备才能实现的功能， 构成数字微波接力通信设备， 与现有技术相比其结构 明显简化， 对于一个微波接力链路， 本专利设备所用设备的数量只有传统 方案的 n/2+l 左右， 所以其设备成本大为下降， 经济效益明显。 （2) 安装 维护方便； 本设备在每个站点仅需要安装一套设备即可， 所以安装操作比 较简单， 故障率亦相应降低， 其维护相对容易、 方便。 （3 ) 作用效果好； 本发明的公务数据和语音的方向选择相对现有技术具有明显的优势； 而且 监控数据传输在网管路由选择方面亦比现有设备的站点内跳接效果更好， 可较好地应用于替代现有的产品使用。 附图说明
图 1是传统的点对点微波接力通信系统的链路示意图。
图 2是图 1所示点对点微波接力通信系统采用的端设备的结构示意图。 图 3是本发明数字微波接力通信系统采用的端设备的结构示意图。 图 4是本发明数字微波接力通信系统的链路示意图。
具体实施方式
下面结合实施例及附图对本发明作进一步详细的描述，但本发明的实施 方式不限于此。
实施例
图 3示出了本发明的结构， 由图 3可见， 本数字微波接力通信系统采用 的端设备包括相连接的基带接口、 时分多路复用复接模块、 时分多路复用分 接模块、 调制模块、 解调模块、 室外单元模块、 公务接口、 监控模块； 还包 括交叉连接模块； 所述解调模块及时分多路复用分接模块的数量分别为两 个， 两个解调模块及时分多路复用分接模块并联连接， 其两端同时连接于所 述室外单元及交叉连接模块， 所述交叉连接模块与基带接口相连接。 调制模 块、 解调模块在监控模块的控制下， 配合室外单元模块设置所需频率。
本数字微波接力通信系统采用在每个接力站点的端设备仅为一套即可 实现微波无线接力传送效果， 其实现方法如图 4所示， 利用本频分双工双 向微波接力设备中的交叉连接模块将两路解调经分接后的信号选择出需要 送接口的部分送基带接口， 而将需要发往另一方向的信号分出送入时分多 路复用复接模块进行复接、 调制， 以发向另一方向； 在除了末端站以外的 每个站点都是向两个方向发送同一个载波， 而接收来自两个方向的两个载 波， 实现与现有每个端站采用的两套端设备才能实现的功能。 具体在跳接 公务链接处理时， 将同一个载波发往两个方向， 同时在相应的字段上标示 方向即可实现。 使本发明的公务数据和语音的方向选择比传统的点对点接 力设备的站点内跳接公务链接显示出明显的优势。具体在网络管理数据时， 跳接网管路由链接是将同一个载波发往两个方向， 仅需在接收时作相应的 识别即可实现。利用本发明可简化 IP路由表，提高网络管理数据传输效率。
上述实施例为本发明较佳的实施方式， 但本发明的实施方式并不受上 述实施例的限制， 其他的任何未背离本发明的精神实质与原理下所作的改 变、 修饰、 替代、 组合、 简化， 均应为等效的置换方式， 都包含在本发明 的保护范围之内。

Claims

权利要求书
1、一种数字微波接力通信系统， 其每段链路的接力站点由频分双工微 波接力设备构成， 所述频分双工微波接力设备包括相连接的基带接口、 时 分多路复用复接模块、 时分多路复用分接模块、 调制模块、 解调模块、 室 外单元模块、 公务接口、 监控模块和交叉连接模块等， 其特征在于： 每个 接力站点的频分双工微波接力设备为一套频分双工双向微波接力设备。
2、 根据权利要求 1所述的数字微波接力通信系统， 其特征在于： 所述 频分双工双向微波接力设备包括交叉连接模块； 所述解调模块及时分多路 复用分接模块的数量分别为两个， 两个时分多路复用分接模块同时连接于 所述交叉连接模块及室外单元模块，所述交叉连接模块与基带接口相连接。
3、 根据权利要求 1所述的数字微波接力通信系统， 其特征在于： 所述 调制模块、 解调模块在监控模块的控制下， 配合室外单元模块设置所需频 率。
4、 根据权利要求 1所述的数字微波接力通信系统， 其特征在于： 所述 两个解调模块及两个时分多路复用分接模块并接到交叉连接模块。 +
5、 一种利用权利要求 1〜4任一项所述数字微波接力通信系统实现的 方法， 其特征在于： 利用频分双工双向微波接力设备中的交叉连接模块将 两路解调经分接后的信号选择出需要送接口的部分送基带接口， 而将需要 发往另一方向的信号分出送入时分多路复用复接模块进行复接、 调制， 以 发向另一方向； 在除了末端站以外的每个站点都是向两个方向发送同一个 载波， 而接收来自两个方向的两个载波。
6、根据权利要求 5所述的方法，其特征在于：在跳接公务链接处理时， 接力设备的两个解调模块及时分多路复用分接模块并接到交叉连接模块之 后的公务， 将同一个载波发往两个方向， 同时在相应的字段上标示方向。
7、 根据权利要求 5所述的方法， 其特征在于： 在网络管理数据时， 跳 接网管路由链接是将同一个载波发往两个方向， 仅需在接收时作相应的 i只 别。
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