WO2012159365A1 - 一种实现无线网络信道仿真的方法、装置和系统 - Google Patents
一种实现无线网络信道仿真的方法、装置和系统 Download PDFInfo
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- WO2012159365A1 WO2012159365A1 PCT/CN2011/077960 CN2011077960W WO2012159365A1 WO 2012159365 A1 WO2012159365 A1 WO 2012159365A1 CN 2011077960 W CN2011077960 W CN 2011077960W WO 2012159365 A1 WO2012159365 A1 WO 2012159365A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
Definitions
- the present invention relates to wireless communication technologies, and more particularly to a method, apparatus and system for implementing wireless network channel emulation. Background technique
- the propagation of electric waves in a wireless channel is not a single path, but a synthesis of reflected waves in many paths. Since the distances of the electric waves passing through the respective paths are different, the arrival time of the reflected waves in each path is different.
- the transmitting end sends a very narrow pulse signal, the signal received by the mobile station is composed of many pulse signals of different delays, which is called delay spread.
- the phases are different. Multiple signals of different phases are superimposed at the receiving end, and the amplitude of the received signal will change abruptly, that is, fast fading occurs. This fading is caused by a variety of paths, so it is called multipath fading. In addition to the rapid fading of the received signal, the received signal may also cause slow fading due to shadowing effects and meteorological causes.
- a signal sent by a terminal is received by a plurality of neighboring base stations adjacent to the serving base station in addition to being received by the serving base station, and constitutes an uplink channel interference of the neighboring base station; likewise, the base station transmits signals in addition to being served by the base station.
- the terminal in the area receives the terminal and is also received by the terminal in the neighboring area, thus constituting the downlink channel interference of the neighboring terminal.
- Such a point-to-multipoint, multi-point to point, and multi-point to multi-point wireless channel environment in a cellular wireless communication system is referred to as a wireless network channel.
- the wireless network channel In addition to changes in the geographical environment and movement speed of the communication network, the wireless network channel has a close relationship with the cellular network topology.
- the complexity, diversity and time-varying of wireless network channels pose great difficulties for wireless base station system design and system parameter configuration.
- wireless simulation technology plays an important role in the development of wireless systems in wireless systems.
- the wireless channel simulation technology mainly has soft simulation technology and channel simulator technology.
- Soft simulation technology Wireless modeling by software tools, output simulation results, generally running in a personal computer (PC, Personal Computer), soft simulation technology is generally used for offline, non-real-time simulation.
- Channel Simulator Technology Wireless modeling through embedded systems, real-time application of channel data generated by modeling to actual baseband data. However, it is only possible to simulate a point-to-point channel situation, which is difficult to perform for actual channel simulation. Summary of the invention
- the technical problem to be solved by the present invention is to provide a method, device and system for wireless network channel simulation, establish a wireless network channel simulation environment in a laboratory, and provide support for research and development of a wireless base station system.
- the device for simulating the wireless network channel includes: a file management unit, a signal processing unit;
- a file management unit configured to generate a channel feature file of the wireless network channel according to the external field channel data
- the signal processing unit is configured to connect the mobile station and the base station, and perform channelization processing on the baseband data between the mobile station and the base station based on the channel feature file of the wireless network channel.
- the device further includes:
- a first file control unit configured to download the channel feature file generated by the file management unit into the signal processing unit and periodically update.
- the device further includes: An interface processing unit, the signal processing unit is connected to the mobile station and the base station by the interface processing unit, and the interface processing unit is configured to perform baseband data mapping between the mobile station and the signal processing unit, and between the base station and the signal processing unit.
- the file management unit is further configured to generate an interface baseband data mapping file according to a topology connection between the mobile station and the interface processing unit, and the base station and the interface processing unit; the device further includes:
- a second file control unit configured to download the interface baseband data mapping file generated by the file management unit into the interface processing unit.
- the file management unit records channel characteristics of the wireless network channel according to channel data collected in a real network channel environment or based on a network channel environment model, and generates a channel feature file of the wireless network channel.
- the mobile station and the interface processing unit, the base station and the interface processing unit are all connected by an optical fiber or a high-speed cable, and the interface processing unit and the channel processing unit are connected by a backplane bus.
- the present invention also provides a system for wireless network channel emulation, comprising: devices for simulating more than one wireless network channel are connected by respective signal processing units;
- the device includes:
- a file management unit configured to generate a channel feature file of the wireless network channel according to the external field channel data
- the signal processing unit is configured to connect the mobile station and the base station, and perform channelization processing on the baseband data between the mobile station and the base station based on the channel feature file of the wireless network channel.
- the present invention also provides a method for wireless network channel emulation, the method comprising:
- the determining, according to the external field channel data, the channel characteristics of the wireless network channel including:
- the channel characteristics of the wireless network channel are recorded based on channel data acquired in a real network channel environment or based on a network channel environment model.
- the channel feature based on the wireless network channel performs channelization processing on the baseband data between the mobile station and the base station, and includes:
- the channel characteristics of the wireless network channel are periodically updated, and the baseband data between the mobile station and the base station is channelized through the optical fiber or the high speed cable based on the channel characteristics.
- the present invention has at least the following advantages:
- the method, device and system for realizing wireless network channel simulation according to the present invention can reproduce the actual wireless network channel environment of the external field indoors, and can also flexibly simulate the handover of the mobile station between the base stations and the mobile station by editing the channel characteristics.
- the channel environment required by users such as the network edge, used for verification of wireless base station system products, accelerates fault convergence, and shortens the time required for the performance of the wireless base station system product to be stable.
- the system in which a plurality of said devices for implementing wireless network channel emulation are integrated, is aggregated and interface matched by an interface processing unit, and can support more base stations and mobile stations.
- FIG. 1 is a schematic structural diagram of an apparatus for implementing wireless network channel emulation in the first embodiment
- FIG. 2 is a schematic structural diagram of an apparatus for implementing wireless network channel emulation in the second embodiment
- FIG. 3 is a third embodiment
- FIG. 4 is a schematic structural diagram of a device for implementing wireless network channel emulation in the fourth embodiment
- FIG. 5 is a schematic structural diagram of a system for implementing wireless network channel emulation in the fifth embodiment
- 6 is a flowchart of a method for implementing wireless network channel emulation in the sixth embodiment
- FIG. 7 is a diagram of a base station and a mobile station and a device for implementing wireless network channel emulation in the seventh embodiment
- a schematic diagram of a specific topology connection relationship A schematic diagram of a specific topology connection relationship. detailed description
- the present invention primarily provides an apparatus, system and method for implementing wireless network channel emulation.
- a first embodiment of the present invention an apparatus for implementing wireless network channel emulation, as shown in FIG. 1, includes the following components:
- a file management unit configured to generate a channel feature file of the wireless network channel according to the external field channel data.
- the channel feature file can be a channel feature script.
- the file management unit records the channel characteristics of the wireless network channel according to the channel data collected in the real network channel environment or based on the network channel environment model, and generates a channel characteristic file of the wireless network channel.
- a signal processing unit configured to connect a plurality of mobile stations and base stations, and perform channelization processing on baseband data between the mobile station and the base station based on a channel feature file of the wireless network channel.
- the mobile station and the channel processing unit, the base station, and the channel processing unit are connected by an optical fiber or a high-speed cable. Both the fiber and the high speed cable can transmit baseband data.
- a second embodiment of the present invention a device for implementing wireless network channel emulation, as shown in FIG. 2, includes the following components:
- a file management unit configured to generate a channel feature file of the wireless network channel according to the external field channel data.
- the channel feature file can be a channel feature script.
- the file management unit records the channel characteristics of the wireless network channel according to the channel data collected in the real network channel environment or based on the network channel environment model, and generates a channel characteristic file of the wireless network channel.
- the first file control unit is configured to download the channel feature file generated by the file management unit into the signal processing unit and update periodically. Downloading channel profile is time consuming, updated The process updates the changed portion of the channel profile without re-downloading the channel profile.
- a signal processing unit configured to connect a plurality of mobile stations and base stations, and perform channelization processing on baseband data between the mobile station and the base station based on a channel feature file of the wireless network channel.
- the mobile station and the channel processing unit, the base station, and the channel processing unit are connected by an optical fiber or a high-speed cable.
- a third embodiment of the present invention an apparatus for implementing wireless network channel emulation, as shown in FIG. 3, includes the following components:
- a file management unit configured to generate a channel feature file of the wireless network channel according to the external field channel data.
- the channel feature file can be a channel feature script.
- the file management unit records the channel characteristics of the wireless network channel according to the channel data collected in the real network channel environment or based on the network channel environment model, and generates a channel characteristic file of the wireless network channel.
- the first file control unit is configured to download the channel feature file generated by the file management unit into the signal processing unit and update periodically.
- a signal processing unit configured to connect a plurality of mobile stations and base stations through the interface processing unit, and perform channelization processing on the baseband data between the mobile station and the base station based on the channel feature file of the wireless network channel.
- the mobile station and the interface processing unit, the base station, and the interface processing unit are connected by optical fibers or high-speed cables.
- the interface processing unit and the channel processing unit are connected by a backplane bus.
- An interface processing unit configured to perform baseband data mapping between the mobile station and the signal processing unit, and between the base station and the signal processing unit to implement convergence and interface matching.
- an interface processing unit configured to perform baseband data mapping between the mobile station and the signal processing unit, and between the base station and the signal processing unit to implement convergence and interface matching.
- an apparatus for implementing wireless network channel emulation includes the following components: 1) a file management unit, configured to generate a channel feature file of the wireless network channel according to the external field channel data, and generate an interface baseband data mapping file according to the topology connection between the mobile station and the interface processing unit, and the base station and the interface processing unit.
- the channel feature file can be a channel feature script.
- the interface baseband data mapping file can be an interface mapping script.
- the file management unit records the channel characteristics of the wireless network channel according to the channel data collected in the real network channel environment or based on the network channel environment model, and generates a channel feature file of the wireless network channel.
- the first file control unit is configured to download the channel feature file generated by the file management unit into the signal processing unit and update periodically.
- a signal processing unit configured to connect a plurality of mobile stations and base stations through the interface processing unit, and perform channelization processing on the baseband data between the mobile station and the base station based on the channel feature file of the wireless network channel.
- the mobile station and the interface processing unit, the base station, and the interface processing unit are connected by optical fibers or high-speed cables.
- the interface processing unit and the channel processing unit are connected by a backplane bus.
- the second file control unit is configured to download the interface baseband data mapping file generated by the file management unit to the interface processing unit.
- An interface processing unit configured to perform baseband data mapping between the mobile station and the signal processing unit, and between the base station and the signal processing unit to implement aggregation and interface matching.
- an interface processing unit configured to perform baseband data mapping between the mobile station and the signal processing unit, and between the base station and the signal processing unit to implement aggregation and interface matching.
- a system for implementing wireless network channel emulation which is composed of two devices connected in the first embodiment, is taken as an example.
- the system includes the following components: The optical fibers or high-speed cables of the respective signal processing units are connected together; the device is the device described in the above embodiments, and details are not described herein.
- a sixth embodiment of the present invention a method for implementing wireless network channel emulation, as shown in FIG. 6, includes the following steps: Step S101: Determine channel characteristics of the wireless network channel according to the external field channel data. Specifically, the channel characteristics of the wireless network channel are recorded according to channel data collected in a real network channel environment or based on a network channel environment model.
- Step S102 Perform channelization processing on baseband data between the mobile station and the base station based on channel characteristics of the wireless network channel. Specifically, the channel characteristics of the wireless network channel are periodically updated, and the baseband data between the mobile station and the base station is channelized through the optical fiber or the high-speed cable based on the channel characteristics.
- the base station (abbreviated as bbu) is a dual antenna
- the mobile station (referred to as ue) is a single antenna.
- the specific topology relationship between the base station and the mobile station and the device for implementing the wireless network channel emulation is shown in Fig. 7.
- Each interface processing unit accesses 2 base stations and 1 mobile station through the optical fiber. Due to the limitation of the number of antennas, two base stations transmit two baseband data respectively, and one mobile station transmits one baseband data.
- connection between the interface processing unit and the base station and the mobile station, the backplane bus, and the interface to which the channel processing unit is externally connected all have a baseband data transmission rate.
- Each bidirectional arrow represents a connection with a baseband data transfer rate that can carry up to four baseband data.
- Step 1 The file management unit generates a channel feature script according to the channel data file collected by the external field.
- the existing channel collection device collects channel data from the external field, and the file management unit generates a channel feature script according to the channel data collected from the external field. If the channel feature is continuously collected at the set frequency, the channel feature script sequence is obtained. .
- Table 1 is a channel feature script that contains channel feature samples when baseband data is transmitted between all interfaces of the channel processing unit. The channel processing unit has a total of 22 interfaces, so it can transmit 88 baseband data: baseband idl, baseband id2 baseband id88. Table 1 specifically lists the channel characteristics when transmitting baseband data between all basebands.
- Step 2 The file management unit generates an interface mapping script according to a specific topology connection relationship between the base station and the mobile station and the device for implementing wireless network channel emulation.
- the interface mapping script is shown in Table 2.
- the five baseband data (baseband bbul-1, baseband bbul-2, baseband bbu2-l, baseband bbu2-2, baseband ue) from the mobile station and the base station can be mapped to the interface processing unit and
- the two interfaces connected to the backplane bus occupy the four baseband data of interface 1 and one baseband data of interface 2.
- the baseband bbul-1 and the baseband bbul-2 are respectively basebands corresponding to the two antennas on the base station bbul
- the baseband bbu2-l and the baseband bbu2-2 are respectively basebands corresponding to the two antennas on the base station bbu2
- the baseband ue is the mobile station ue Baseband corresponding to a single antenna
- Step 3 The first file control unit downloads the interface mapping script into the interface processing unit.
- Step 4 The second file control unit downloads the channel feature script sequence to the channel processing unit.
- Step 5 The interface processing unit aggregates the five baseband data from the mobile station and the base station into two interfaces connected to the interface processing unit and the backplane bus according to the interface mapping script.
- Step 6 The channel processing unit receives the baseband data through the backplane bus, performs network channel synthesis according to the channel feature script, and superimposes the channel characteristics of the same base station, and then bases the baseband data.
- the network channel is transmitted to the corresponding baseband of the backplane.
- Step 7 The interface processing unit maps the baseband data on the backplane to the interface connected to the mobile station or the base station according to the interface mapping script.
- the method, device and system for implementing wireless network channel simulation according to the present invention can flexibly simulate a channel environment that a mobile station needs to switch between base stations and a mobile station located at a network edge, etc., by using a channel feature, for a wireless base station system product. Verification, accelerates fault convergence, and shortens the time required for wireless base station system product performance to stabilize.
- the system that integrates a plurality of said devices implementing wireless network channel emulation can support more base stations and mobile stations.
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Abstract
本发明公开了一种实现无线网络信道仿真的方法、装置和系统，该方法包括根据外场信道数据确定无线网络信道的信道特征；基于无线网络信道的信道特征对移动台与基站间的基带数据进行传输。该装置包括：文件管理单元和信号处理单元。可以在室内重现外场实际的无线网络信道环境，也可以通过编辑信道特征，可以灵活地模拟移动台在基站间切换、移动台位于网络边缘等用户需要的信道环境，用于无线基站系统产品的验证，加速故障收敛，缩短无线基站系统产品性能稳定需要的时间。将多个所述实现无线网络信道仿真的装置集成在一起的所述系统，通过接口单元进行汇聚和接口匹配，能够支持更多的基站和移动台。
Description
一种实现无线网络信道仿真的方法、 装置和系统 技术领域
本发明涉及无线通讯技术， 尤其涉及一种实现无线网络信道仿真的方 法、 装置和系统。 背景技术
无线信道中电波的传播不是单一路径， 而是许多路径中反射波的合成。 由于电波通过各个路径的距离不同， 因而各个路径中的反射波到达时间即 时延不同。 当发送端发送一个极窄的脉沖信号时， 移动台接收的信号由许 多不同时延的脉沖信号组成， 称为时延扩展。
由于各个路径中的反射波时延不同， 相位也就不同。 不同相位的多个 信号在接收端迭加， 接收信号的幅度将急剧变化， 即产生了快衰落。 这种 衰落是由多种路径引起的， 所以称为多径衰落。 接收信号除瞬时值出现快 衰落之外， 还可能由阴影效应和气象原因引起慢衰落。
由于移动通信中移动台的移动性， 无线信道中还会有多普勒效应。 多 普勒效应进一步加大了移动通信的复杂性。
以上谈及的无线信道特征， 包括多径传播、 时延扩展、 衰落特性以及 多普勒效应等， 仅仅是点到点的无线信道。 在蜂窝移动通讯中， 终端发出 的信号除了被服务基站接收外， 还被与服务基站相邻的多个邻区基站接收， 构成邻区基站的上行信道干扰； 同样， 基站发射信号除了被其服务区域内 的终端接收外， 同时也被邻区的终端接收， 因此构成了邻区终端的下行信 道干扰。 这种在蜂窝无线通讯系统中点到多点、 多点到点以及多点到多点 的无线信道环境称为无线网络信道。 无线网络信道除了随通讯地理环境、 移动速度变化而变化外， 还与蜂窝网络拓朴结构有密切的关系。
无线网络信道的复杂性、 多样性以及时变性给无线基站系统设计和系 统参数配置带来了很大难度。 通常无线基站系统在批量应用以前， 很难预 知其在网络环境下的系统性能。 因此， 无线仿真技术在无线技术在无线系 统研发中扮演着重要的角色。
目前无线信道仿真技术主要有软仿真技术和信道模拟器技术。
软仿真技术： 通过软件工具进行无线建模， 输出仿真结果， 一般在个 人电脑 （PC, Personal Computer ) 中运行， 软仿真技术一般用于离线、 非 实时仿真。
信道模拟器技术： 通过嵌入式系统进行无线建模， 把建模产生的信道 数据实时作用于实际的基带数据。 但仅能够模拟点对点信道情况， 对实际 信道模拟很难胜任。 发明内容
本发明要解决的技术问题是， 提供一种无线网络信道仿真的方法、 装 置和系统， 在实验室建立无线网络信道模拟环境， 对无线基站系统的研发 提供支持。
本发明采用的技术方案是， 所述无线网络信道仿真的装置， 该装置包 括： 文件管理单元、 信号处理单元； 其中，
文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特征 文件；
信号处理单元， 用于连接移动台和基站， 并基于无线网络信道的信道 特征文件对移动台与基站间的基带数据进行信道化处理。
进一步的， 该装置还包括：
第一文件控制单元， 用于将文件管理单元生成的所述信道特征文件下 载到信号处理单元中并定时更新。
进一步的， 该装置还包括：
接口处理单元， 信号处理单元通过所述接口处理单元连接移动台和基 站， 所述接口处理单元用于在移动台与信号处理单元之间、 以及基站与信 号处理单元之间进行基带数据映射。
进一步的， 所述文件管理单元， 还用于根据移动台与接口处理单元、 以及基站与接口处理单元的拓朴连接情况生成接口基带数据映射文件； 该装置还包括：
第二文件控制单元， 用于将文件管理单元生成的接口基带数据映射文 件下载到接口处理单元中。
进一步的， 所述文件管理单元根据在真实网络信道环境中采集的信道 数据或者基于网络信道环境模型， 记录无线网络信道的信道特征， 生成无 线网络信道的信道特征文件。
进一步的， 所述移动台与接口处理单元、 基站与接口处理单元均通过 光纤或者高速电缆连接， 接口处理单元与信道处理单元之间通过背板总线 连接。
本发明还提供一种无线网络信道仿真的系统， 包括： 一个以上无线网 络信道仿真的装置通过各自的信号处理单元连接在一起；
该装置包括：
文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特征 文件；
信号处理单元， 用于连接移动台和基站， 并基于无线网络信道的信道 特征文件对移动台与基站间的基带数据进行信道化处理。
基于上述无线网络信道仿真的装置， 本发明还提供一种无线网络信道 仿真的方法， 该方法包括：
根据外场信道数据确定无线网络信道的信道特征；
基于无线网络信道的信道特征对移动台与基站间的基带数据进行信道
化处理。
进一步的， 所述根据外场信道数据确定无线网络信道的信道特征， 包 括：
根据在真实网络信道环境中采集的信道数据或者基于网络信道环境模 型， 记录无线网络信道的信道特征。
进一步的， 所述基于无线网络信道的信道特征对移动台与基站间的基 带数据进行信道化处理， 包括：
定时更新无线网络信道的信道特征， 基于所述信道特征通过光纤或者 高速电缆对移动台与基站间的基带数据进行信道化处理。
采用上述技术方案， 本发明至少具有下列优点：
本发明所述实现无线网络信道仿真的方法、 装置和系统， 可以在室内 重现外场实际的无线网络信道环境， 也可以通过编辑信道特征， 可以灵活 地模拟移动台在基站间切换、 移动台位于网络边缘等用户需要的信道环境， 用于无线基站系统产品的验证， 加速故障收敛， 缩短无线基站系统产品性 能稳定需要的时间。 将多个所述实现无线网络信道仿真的装置集成在一起 的所述系统， 通过接口处理单元进行汇聚和接口匹配， 能够支持更多的基 站和移动台。 附图说明
图 1为第一实施例中所述实现无线网络信道仿真的装置结构示意图； 图 2为第二实施例中所述实现无线网络信道仿真的装置结构示意图； 图 3为第三实施例中所述实现无线网络信道仿真的装置结构示意图； 图 4为第四实施例中所述实现无线网络信道仿真的装置结构示意图； 图 5为第五实施例中所述实现无线网络信道仿真的系统结构示意图； 图 6为第六实施例中所述实现无线网络信道仿真的方法流程图； 图 7 为第七实施例中基站和移动台与实现无线网络信道仿真的装置的
具体拓朴连接关系示意图。 具体实施方式
下结合附图及较佳实施例， 对本发明进行详细说明如后。
为了在实验室建立无线网络信道模拟环境， 充分暴露基站系统产品中 存在的问题。 本发明主要提供了一种实现无线网络信道仿真的装置、 系统 和方法。
本发明第一实施例， 一种实现无线网络信道仿真的装置， 如图 1所示， 包括以下组成部分：
1 )文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特 征文件。 该信道特征文件可以是信道特征脚本。 具体的， 文件管理单元根 据在真实网络信道环境中采集的信道数据或者基于网络信道环境模型， 记 录无线网络信道的信道特征， 生成无线网络信道的信道特征文件。
2 )信号处理单元， 用于连接若干移动台和基站， 并基于无线网络信道 的信道特征文件对移动台与基站间的基带数据进行信道化处理。 具体的， 移动台与信道处理单元、 基站与信道处理单元之间均通过光纤或者高速电 缆连接。 该光纤和高速电缆均能传输基带数据。
本发明第二实施例， 一种实现无线网络信道仿真的装置， 如图 2所示， 包括以下组成部：
1 )文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特 征文件。 该信道特征文件可以是信道特征脚本。 具体的， 文件管理单元根 据在真实网络信道环境中采集的信道数据或者基于网络信道环境模型， 记 录无线网络信道的信道特征， 生成无线网络信道的信道特征文件。
2 )第一文件控制单元， 用于将文件管理单元生成的该信道特征文件下 载到信号处理单元中并定时更新。 下载信道特征文件比较耗时， 更新的过
程是对该信道特征文件中发生变化的部分进行更新， 而不用重新下载信道 特征文件。
3 )信号处理单元， 用于连接若干移动台和基站， 并基于无线网络信道 的信道特征文件对移动台与基站间的基带数据进行信道化处理。 具体的， 移动台与信道处理单元、 基站与信道处理单元之间均通过光纤或者高速电 缆连接。
本发明第三实施例， 一种实现无线网络信道仿真的装置， 如图 3所示， 包括以下组成部：
1 )文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特 征文件。 该信道特征文件可以是信道特征脚本。 具体的， 文件管理单元根 据在真实网络信道环境中采集的信道数据或者基于网络信道环境模型， 记 录无线网络信道的信道特征， 生成无线网络信道的信道特征文件。
2 )第一文件控制单元， 用于将文件管理单元生成的该信道特征文件下 载到信号处理单元中并定时更新。
3 )信号处理单元， 用于通过接口处理单元连接若干移动台和基站， 并 基于无线网络信道的信道特征文件对移动台与基站间的基带数据进行信道 化处理。 具体的， 移动台与接口处理单元、 基站与接口处理单元之间均通 过光纤或者高速电缆连接。 接口处理单元与信道处理单元之间通过背板总 线连接。
4 )接口处理单元， 用于在移动台与信号处理单元之间、 以及基站与信 号处理单元之间进行基带数据映射， 以实现汇聚和接口匹配。 在本实施例 中， 通过增加接口处理单元， 可以对信号处理单元连接移动台和基站的数 量进行扩展， 增加单个信道处理单元接入能力， 降低设备互联级数。
本发明第四实施例， 一种实现无线网络信道仿真的装置， 如图 4所示， 包括以下组成部：
1 )文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特 征文件， 并根据移动台与接口处理单元、 以及基站与接口处理单元的拓朴 连接情况生成接口基带数据映射文件。 该信道特征文件可以是信道特征脚 本。 接口基带数据映射文件可以是接口映射脚本。 具体的， 文件管理单元 根据在真实网络信道环境中采集的信道数据或者基于网络信道环境模型， 记录无线网络信道的信道特征， 生成无线网络信道的信道特征文件。
2 )第一文件控制单元， 用于将文件管理单元生成的该信道特征文件下 载到信号处理单元中并定时更新。
3 )信号处理单元， 用于通过接口处理单元连接若干移动台和基站， 并 基于无线网络信道的信道特征文件对移动台与基站间的基带数据进行信道 化处理。 具体的， 移动台与接口处理单元、 基站与接口处理单元之间均通 过光纤或者高速电缆连接。 接口处理单元与信道处理单元之间通过背板总 线连接。
4 )第二文件控制单元， 用于将文件管理单元生成的接口基带数据映射 文件下载到接口处理单元中。
5 )接口处理单元， 用于在移动台与信号处理单元之间、 以及基站与信 号处理单元之间进行基带数据映射， 以实现汇聚和接口匹配。 在本实施例 中， 通过增加接口处理单元， 可以对信号处理单元连接移动台和基站的数 量进行扩展， 增加单个信道处理单元接入能力， 降低设备互联级数。
本发明第五实施例， 以两个第一实施例中所述装置连接组成的实现无 线网络信道仿真的系统为例， 如图 5 所示， 该系统包括以下组成部分： 多 个所述装置通过各自的信号处理单元的光纤或者高速电缆连接在一起； 所 述装置为上述实施例中描述的装置， 这里不再赘述。
本发明第六实施例， 一种实现无线网络信道仿真的方法， 如图 6所示， 包括以下步驟：
步驟 S101 ,根据外场信道数据确定无线网络信道的信道特征。具体的， 根据在真实网络信道环境中采集的信道数据或者基于网络信道环境模型， 记录无线网络信道的信道特征。
步驟 S102, 基于无线网络信道的信道特征对移动台与基站间的基带数 据进行信道化处理。 具体的， 定时更新无线网络信道的信道特征， 基于该 信道特征通过光纤或者高速电缆对移动台与基站间的基带数据进行信道化 处理。
本发明第七实施例， 以 8个基站、 4个移动台仿真系统为例作进一步的 详细描述。 基站（简称 bbu ) 为双天线， 移动台 （简称 ue ) 为单天线。 基 站和移动台与实现无线网络信道仿真的装置的具体拓朴连接关系如图 7所 示， 每个接口处理单元通过光纤接入 2个基站和 1个移动台。 由于天线数 量的限制， 2个基站分别传输 2个基带数据， 1个移动台传输 1个基带数据。 接口处理单元与基站和移动台之间的连接、 背板总线、 以及信道处理单元 对外连接的接口都具备基带数据传输速率。 每个双向箭头表示一个具备基 带数据传输速率的连接， 最多可传输四个基带数据。
实现无线网络信道仿真的过程如下：
步驟 1 , 文件管理单元根据外场采集的信道数据文件生成信道特征脚 本。
具体的， 现有的信道采集设备从外场采集到信道数据， 文件管理单元 根据从外场采集的信道数据生成信道特征脚本， 如果是以设定的频率持续 采集的， 那么就会得到信道特征脚本序列。 表 1 为信道特征脚本， 其中含 有信道处理单元的所有接口之间传输基带数据时的信道特征样值。 信道处 理单元共有 22 个接口， 因此可以传输 88 个基带数据： 基带 idl、 基带 id2 基带 id88, 表 1中具体列出了所有基带之间传输基带数据时的 信道特征。
表 1
步驟 2,文件管理单元根据基站和移动台与实现无线网络信道仿真的装 置的具体拓朴连接关系， 生成接口映射脚本。 接口映射脚本如表 2所示， 来自移动台和基站的 5个基带数据（基带 bbul-1、基带 bbul-2、基带 bbu2-l、 基带 bbu2-2、 基带 ue )可映射到接口处理单元与背板总线连接的 2个接口 上， 即占用了接口 1的 4个基带数据以及接口 2的一个基带数据。
表 2
基带 bbul-1和基带 bbul-2为基站 bbul上的两个天线分别对应的基带， 基带 bbu2-l和基带 bbu2-2为基站 bbu2上的两个天线分别对应的基带， 基 带 ue为移动台 ue上的单天线对应的基带
步驟 3 , 第一文件控制单元将接口映射脚本下载到接口处理单元中。 步驟 4, 第二文件控制单元将信道特征脚本序列下载到信道处理单元 中。
步驟 5 ,接口处理单元根据接口映射脚本，将来自移动台和基站的 5个 基带数据通过映射汇聚到接口处理单元与背板总线连接的 2个接口上。
步驟 6,信道处理单元通过背板总线接收基带数据，根据信道特征脚本 进行网络信道合成， 即将同一基站相关信道特征迭加， 然后将基带数据经
网络信道传输到背板相应的基带上。
步驟 7,接口处理单元根据接口映射脚本，把背板上的基带数据映射到 接口处理单元与移动台或者基站连接的接口上。
本发明所述实现无线网络信道仿真的方法、 装置和系统， 通过编辑信 道特征， 可以灵活地模拟移动台在基站间切换、 移动台位于网络边缘等用 户需要的信道环境， 用于无线基站系统产品的验证， 加速故障收敛， 缩短 无线基站系统产品性能稳定需要的时间。 将多个所述实现无线网络信道仿 真的装置集成在一起的所述系统， 能够支持更多的基站和移动台。
通过具体实施方式的说明， 应当可对本发明为达成预定目的所采取的 技术手段及功效得以更加深入且具体的了解， 然而所附图示仅是提供参考 与说明之用， 并非用来对本发明加以限制。
Claims
1、 一种无线网络信道仿真的装置， 其特征在于， 该装置包括： 文件管 理单元、 信号处理单元； 其中，
文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特征 文件；
信号处理单元， 用于连接移动台和基站， 并基于无线网络信道的信道 特征文件对移动台与基站间的基带数据进行信道化处理。
2、 根据权利要求 1所述无线网络信道仿真的装置， 其特征在于， 所述 装置还包括：
第一文件控制单元， 用于将文件管理单元生成的所述信道特征文件下 载到信号处理单元中并定时更新。
3、 根据权利要求 1或 2所述无线网络信道仿真的装置， 其特征在于， 所述装置还包括：
接口处理单元， 信号处理单元通过所述接口处理单元连接移动台和基 站， 所述接口处理单元用于在移动台与信号处理单元之间、 以及基站与信 号处理单元之间进行基带数据映射。
4、 根据权利要求 3所述无线网络信道仿真的装置， 其特征在于， 所述 文件管理单元， 还用于根据移动台与接口处理单元、 以及基站与接口处理 单元的拓朴连接情况生成接口基带数据映射文件；
所述装置还包括：
第二文件控制单元， 用于将文件管理单元生成的接口基带数据映射文 件下载到接口处理单元中。
5、 根据权利要求 1所述无线网络信道仿真的装置， 其特征在于， 所述 文件管理单元根据在真实网络信道环境中采集的信道数据或者基于网络信 道环境模型， 记录无线网络信道的信道特征， 生成无线网络信道的信道特 征文件。
6、 根据权利要求 3所述无线网络信道仿真的装置， 其特征在于， 所述 移动台与接口处理单元、 基站与接口处理单元均通过光纤或者高速电缆连 接， 接口处理单元与信道处理单元之间通过背板总线连接。
7、 一种无线网络信道仿真的系统， 其特征在于， 包括： 一个以上无线 网络信道仿真的装置通过各自的信号处理单元连接在一起；
所述装置包括：
文件管理单元， 用于根据外场信道数据生成无线网络信道的信道特征 文件；
信号处理单元， 用于连接移动台和基站， 并基于无线网络信道的信道 特征文件对移动台与基站间的基带数据进行信道化处理。
8、 一种无线网络信道仿真的方法， 其特征在于， 该方法包括： 根据外场信道数据确定无线网络信道的信道特征；
基于无线网络信道的信道特征对移动台与基站间的基带数据进行信道 化处理。
9、 根据权利要求 8所述无线网络信道仿真的方法， 其特征在于， 所述 根据外场信道数据确定无线网络信道的信道特征， 包括：
根据在真实网络信道环境中采集的信道数据或者基于网络信道环境模 型， 记录无线网络信道的信道特征。
10、 根据权利要求 8或 9所述无线网络信道仿真的方法， 其特征在于， 所述基于无线网络信道的信道特征对移动台与基站间的基带数据进行信道 化处理， 包括：
定时更新无线网络信道的信道特征， 基于所述信道特征通过光纤或者 高速电缆对移动台与基站间的基带数据进行信道化处理。
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| CN1588933A (zh) * | 2004-09-10 | 2005-03-02 | 深圳市中实科技有限公司 | 一种数字解调接收装置 |
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