WO2019047202A1 - Access signal generating method and device and access signal - Google Patents

Access signal generating method and device and access signal Download PDF

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Publication number
WO2019047202A1
WO2019047202A1 PCT/CN2017/101182 CN2017101182W WO2019047202A1 WO 2019047202 A1 WO2019047202 A1 WO 2019047202A1 CN 2017101182 W CN2017101182 W CN 2017101182W WO 2019047202 A1 WO2019047202 A1 WO 2019047202A1
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access signal
bandwidth
sequence
transmission time
frequency range
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PCT/CN2017/101182
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French (fr)
Chinese (zh)
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安林峰
管鲍
刘恒甫
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海能达通信股份有限公司
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Priority to PCT/CN2017/101182 priority Critical patent/WO2019047202A1/en
Publication of WO2019047202A1 publication Critical patent/WO2019047202A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access

Definitions

  • the present invention relates to the field of wireless mesh (MESH) network communication technologies, and in particular, to an access signal generation method, apparatus, and access signal.
  • MSH wireless mesh
  • the wireless MESH network is divided into two types: asynchronous network and synchronous network.
  • asynchronous MESH network When the network density and scale are large, the synchronous MESH network has better network performance in practical applications.
  • network node frame boundary synchronization is required.
  • MESH network synchronization is easier to implement.
  • the external synchronization source satellite signal does not cover, the synchronization signal sent by the primary node needs to be received from the node, and then the access signal is sent from the node to the primary node, and the primary node calculates the timing advance according to the received access signal (Timing Advance, TA ), so that the slave node maintains the same transmit frame boundary as the master node.
  • Timing Advance Timing Advance
  • format0, 1, 2, 3, 4, and format 4 access signals have a coverage of only 2Km, which generally cannot meet network performance requirements, and therefore are not commonly used.
  • the format of the format 0, 1, 2, and 3 access signals is widely used, and thus is widely used.
  • the access signal in format0, 1, 2, and 3 formats has a time length of at least 1 ms (Transmission Time Interval (TTI)), and occupies 6 resource blocks in the frequency domain. 1 is shown.
  • TTI Transmission Time Interval
  • the coverage of the format 0, 1, 2, and 3 format is large, after the access signal of the format 0, 1, 2, and 3 formats is applied in the MESH network, it is used to transmit the access signal within 1 ms.
  • the present invention provides an access signal production method, apparatus, and access signal.
  • a slave node that generates an access signal is only used for transmission of an access signal.
  • the second time slot of the time interval generates an access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is used to transmit data, which improves the transmission time for transmitting the access signal.
  • the efficiency of the use of the interval is only used for transmission of an access signal.
  • An access signal generating method is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions; the method includes:
  • An access signal is generated within the selected bandwidth region based on the frequency range of the selected bandwidth region.
  • the dividing the second time slot for transmitting the transmission time interval of the access signal into the set number of bandwidth regions comprises:
  • the generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region comprises:
  • An access signal is generated within the selected bandwidth region based on the ZC sequence.
  • the generating a ZC sequence according to the frequency range of the selected bandwidth region comprises:
  • a ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  • An access signal generating device is applied to a slave node of a broadband MESH network, the device comprising:
  • a pre-processing unit configured to divide a second time slot for transmitting a transmission time interval into a set number of bandwidth areas
  • a selecting unit configured to select one bandwidth region from the set number of bandwidth regions
  • a signal generating unit configured to generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
  • the preprocessing unit comprises:
  • a first processing unit configured to divide a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
  • a second processing unit configured to divide the access signal area into a set number of bandwidth areas, where a bandwidth is set between adjacent bandwidth areas of the set number of bandwidth areas.
  • the signal generating unit is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
  • the signal generating unit when the signal generating unit generates the ZC sequence according to the frequency range of the selected bandwidth region, the signal generating unit is specifically configured to:
  • a ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  • An access signal generating device includes:
  • the memory is connected to the processor for storing data generated during a program and a program running;
  • the processor is configured to implement the following functions by running a program in the memory:
  • the processor divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidth regions, specifically:
  • said processor is in said selected bandwidth based on a frequency range of said selected bandwidth region
  • an access signal is generated in an area, it is specifically used to:
  • the processor when the processor generates a ZC sequence according to the frequency range of the selected bandwidth region, specifically:
  • a ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  • An access signal occupies a set bandwidth area of a second time slot of a transmission time interval in which the access signal is located, and the access signal includes:
  • a cyclic prefix a sequence of signals, and a guard interval located after the sequence of signals.
  • the length of the cyclic prefix ensures that the access signal supports a coverage of 20 Km.
  • the access signal generating method of the present invention is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions;
  • the method includes: selecting a bandwidth region from the set number of bandwidth regions; and generating an access signal in the selected bandwidth region according to the selected frequency region of the bandwidth region.
  • the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is It can be used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting access signals.
  • FIG. 1 is a schematic structural diagram of a transmission time interval in which an access signal is provided according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another transmission time interval in which an access signal is provided according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for generating an access signal according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of another method for generating an access signal according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an access signal according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of an access signal generating apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another access signal generating apparatus according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another access signal generating apparatus according to an embodiment of the present invention.
  • the embodiment of the invention discloses an access signal generating method, which is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidths. region;
  • the slave node involved in the embodiment of the present invention is specifically a slave node to be connected to the broadband MESH network.
  • the slave node accesses the network, after receiving the synchronization signal sent by the network master node, the slave node needs to use the data occupied by itself.
  • the frame transmission time interval sends an access signal to the master node in the network.
  • the system allocates the transmission time interval of the slave node to the access channel.
  • the transmission time interval is as shown in FIG. 1 .
  • the transmission time interval used by the slave node for transmitting the access signal is according to FIG. 2 .
  • the transmission time interval format shown is for resource partitioning.
  • the slave node transmits the access signal only in the second time slot of the transmission time interval occupied by itself, and the first time slot of the transmission time interval occupied by the slave node is used. send data.
  • the slave node further divides the second time slot of the transmission time interval occupied by the slave node into a set number of bandwidth regions, and each bandwidth region serves as an access channel for transmitting the access signal.
  • the method for generating an access signal includes:
  • the slave node has been divided, and the transmission time interval occupied by itself is as shown in FIG. 2.
  • the bandwidth area (access channel) of the second time slot a bandwidth area is randomly selected for transmitting the access signal.
  • S302. Generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
  • the bandwidth area divided by the node in the second time slot of the transmission time interval occupied by the node respectively occupies different frequency ranges of the second time slot.
  • the access signal generated by the slave node does not occupy the time-frequency resource of the first time slot of the transmission time interval occupied by the node, and therefore, the first time The slot can be used for data transmission, which improves the frequency domain resource utilization of the transmission time interval for transmitting the access signal in the broadband MESH network.
  • the access signal generating method of the embodiment of the present invention is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions;
  • the method includes selecting a bandwidth region from the set number of bandwidth regions, and generating an access signal in the selected bandwidth region according to a frequency range of the selected bandwidth region.
  • the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is It can be used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting access signals.
  • the dividing the second time slot for transmitting the transmission time interval of the access signal into the set number of bandwidth regions includes:
  • the guard interval zone and the access signal zone are specifically divided in the second time slot.
  • the guard interval area is between the access signal area and the first time slot.
  • no data is transmitted within the guard interval, and the specific role is to transmit the communication data and the access signal area of the first time slot.
  • the access signals are separated to avoid mutual interference.
  • the access signal area is specifically used to transmit an access signal.
  • the slave node can only generate and transmit access signals within the divided access signal regions.
  • the slave node further performs frequency domain resource division on the divided access signal regions to obtain multiple bandwidth regions. Moreover, in order to clearly distinguish each bandwidth region, when the slave node divides the bandwidth region in the access signal region, the interval between the adjacent bandwidth regions is set to set the bandwidth.
  • the bandwidth of the broadband MESH network is 5M
  • two sets of bandwidth regions can be divided from the access signal region for random selection; if the bandwidth of the broadband MESH network is 10M, the access signal region can be divided into 4 The group bandwidth area is available for random selection.
  • the generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region includes:
  • the structure of the access signal generated by the node is as shown in FIG. 5, and specifically includes a cyclic prefix, a signal sequence, and a guard interval.
  • the cyclic prefix and the signal sequence are the same sequence; the guard interval is empty to prevent aliasing with other signals.
  • the cyclic prefix and the signal sequence employ a ZC sequence.
  • the ZC sequence is defined as:
  • the slave node generates a corresponding ZC sequence according to the frequency range of the selected bandwidth region.
  • the embodiment of the present invention only uses the ZC sequence as an example to describe the access signal.
  • any available sequence can be selected to generate an access signal.
  • the present invention only defines the location of the access signal, and does not limit the specific sequence of the access signal. Any available sequence for obtaining the access signal is within the protection scope of the embodiment of the present invention.
  • the access node maps the ZC sequence into the frequency range according to the frequency range of the selected bandwidth region, and obtains an access signal.
  • the Preamble id in Table 1 indicates different bandwidth area numbers, startIdx indicates the starting resource unit, and endIdx indicates the last resource unit.
  • T cp represents the length of time of the cyclic prefix CP; Indicates the number of resource units at the time the sequence was sent.
  • the slave node determines startIdx and endIdx in the above formula according to the frequency range of the selected bandwidth region. Further, the slave node maps the ZC sequence into the corresponding frequency range.
  • the step S401 in this embodiment corresponds to the step S301 in the embodiment of the method shown in FIG. 3 .
  • the generating a ZC sequence according to a frequency range of the selected bandwidth region includes:
  • a ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  • the coverage of the access signal is determined by the length of time of its cyclic prefix.
  • the embodiment of the present invention sets the coverage of the access signal sent by the node to be 20 Km.
  • the time length of the cyclic prefix of the access signal is set to ensure the coverage of the access signal.
  • the embodiment of the present invention generates a ZC sequence according to the length of time of the ZC sequence corresponding to the access signal with a coverage of 20Km.
  • the embodiment of the invention discloses an access signal generating device, which is applied to a slave node of a broadband MESH network.
  • the device includes:
  • the pre-processing unit 601 is configured to divide a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth areas;
  • the selecting unit 602 is configured to select one bandwidth area from the set number of bandwidth areas
  • the signal generating unit 603 is configured to generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
  • the access signal generating apparatus is applied to a slave node of a broadband MESH network, and the pre-processing unit 601 of the apparatus divides the second time slot for transmitting the transmission time interval of the access signal into a set number. a bandwidth area; when the apparatus generates an access signal, the selecting unit 602 first selects a bandwidth area from the set number of bandwidth areas; then the signal generating unit 603 selects a frequency range according to the selected bandwidth area. An access signal is generated within the selected bandwidth region.
  • the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is Can It is used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting the access signal.
  • the pre-processing unit 601 includes:
  • the first processing unit 6011 is configured to divide a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
  • the second processing unit 6012 is configured to divide the access signal area into a set number of bandwidth areas, where a bandwidth is set between adjacent bandwidth areas of the set number of bandwidth areas.
  • the signal generating unit 603 is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
  • the signal generating unit 603 is configured to: when generating a ZC sequence according to the frequency range of the selected bandwidth region, specifically:
  • a ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  • Another embodiment of the present invention further discloses an access signal generating apparatus, which is applied to a slave node of a broadband MESH network. As shown in FIG. 8, the method includes:
  • Memory 801 and processor 802 are Memory 801 and processor 802;
  • the memory 801 is connected to the processor 802, and is configured to store data generated during the running of the program and the program;
  • the processor 802 is configured to implement the following functions by running a program in the memory:
  • the access signal generating apparatus is applied to a slave node of a broadband MESH network, and the processor 802 of the apparatus divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidths. a region; when generating an access signal, the processor 802 first selects a bandwidth region from the set number of bandwidth regions; and then generates an access in the selected bandwidth region according to the selected frequency region of the bandwidth region signal.
  • the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is It can be used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting access signals.
  • the processor 802 divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidth regions, specifically, the:
  • the processor 802 is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
  • the processor 802 is configured according to the selected bandwidth region.
  • the frequency range, when generating the ZC sequence, is specifically used to:
  • a ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  • An embodiment of the present invention discloses an access signal, where the access signal occupies a set bandwidth region of a second time slot of a transmission time interval in which the access signal is located.
  • the access signal includes:
  • the cyclic prefix and the signal sequence are the same sequence; the guard interval is empty to prevent aliasing with other signals.
  • the cyclic prefix and the signal sequence employ a ZC sequence. Specifically, the ZC sequence is defined as:
  • the access node maps the ZC sequence into the frequency range according to the frequency range of the selected bandwidth region, and obtains an access signal.
  • the Preamble id in Table 1 indicates different bandwidth area numbers, startIdx indicates the starting resource unit, and endIdx indicates the last resource unit.
  • the slave node determines startIdx and endIdx in the above formula according to the frequency range of the selected bandwidth region. Further, the slave node maps the ZC sequence into the corresponding frequency range.
  • the access signal proposed by the embodiment of the present invention occupies a set bandwidth region of the second time slot of the transmission time interval in which the access signal is located, and specifically includes a cyclic prefix 501, a signal sequence 502, and a guard interval 503 located after the signal sequence.
  • the access signal is used in the broadband MESH network, and the first time slot of the transmission time interval in which the access signal is located can be reserved for transmitting data, which can improve the frequency domain resource utilization rate for transmitting the transmission time interval of the access signal.
  • the length of the cyclic prefix ensures that the access signal supports a coverage of 20Km.
  • the coverage of the access signal is determined by the length of time of its cyclic prefix.
  • the embodiment of the present invention sets the coverage of the access signal sent by the node to be 20 Km.
  • the time length of the cyclic prefix of the access signal is set to ensure the coverage of the access signal.
  • the embodiment of the present invention generates a ZC sequence according to the length of time of the ZC sequence corresponding to the access signal with a coverage of 20Km.

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Abstract

Provided in the present invention are an access signal generating method and device and an access signal. The access signal generating method is applied to a slave node of a broadband mesh network, wherein the slave node divides a second time slot of a transmission time interval used for transmitting the access signal into a preset number of bandwidth areas. The method comprises: selecting a bandwidth area from the preset number of bandwidth areas; and generating the access signal in the selected bandwidth area according to the frequency range of the selected bandwidth area. By employing the technical solution of the present invention, the slave node only generates the access signal in the second time slot of the transmission time interval used for transmitting the access signal, and correspondingly, the first time slot of the transmission time interval used for transmitting the access signal may be used for transmitting data, thereby improving the frequency domain resource utilization rate of the transmission time interval used for transmitting the access signal.

Description

一种接入信号生成方法、装置及接入信号Access signal generation method, device and access signal 技术领域Technical field
本发明涉及无线网格(MESH)网络通信技术领域，尤其涉及一种接入信号生成方法、装置及接入信号。The present invention relates to the field of wireless mesh (MESH) network communication technologies, and in particular, to an access signal generation method, apparatus, and access signal.
背景技术Background technique
无线MESH网络分为异步网络和同步网络两种，当网络密度和规模较大的时候，同步MESH网络在实际应用中具有更好的网络性能。在同步MESH网络中，要求网络节点帧边界同步。在有GPS或北斗等外部同步源协助的情况下，MESH网络同步较容易实现。当外部同步源卫星信号覆盖不到时，需要从节点接收主节点发送的同步信号，然后从节点向主节点发送接入信号，主节点根据接收的接入信号计算时间提前量(Timing Advance，TA)，使得从节点与主节点维持同一发送帧边界。The wireless MESH network is divided into two types: asynchronous network and synchronous network. When the network density and scale are large, the synchronous MESH network has better network performance in practical applications. In a synchronous MESH network, network node frame boundary synchronization is required. In the case of assistance with external synchronization sources such as GPS or Beidou, MESH network synchronization is easier to implement. When the external synchronization source satellite signal does not cover, the synchronization signal sent by the primary node needs to be received from the node, and then the access signal is sent from the node to the primary node, and the primary node calculates the timing advance according to the received access signal (Timing Advance, TA ), so that the slave node maintains the same transmit frame boundary as the master node.
在现有技术中定义了五种格式的接入信号：format0,1,2,3,4，format4格式的接入信号的覆盖范围只有2Km，一般无法满足网络性能要求，因此不常采用。而format0,1,2,3格式的接入信号的覆盖范围较大，因此被广泛采用。在实际使用中，format0,1,2,3格式的接入信号的时间长度至少为1ms(一个传输时间间隔(Transmission Time Interval，TTI))，在频域上占用6个资源块，具体如图1所示。虽然format0,1,2,3格式的接入信号的覆盖范围较大，但是在MESH网络中应用format0,1,2,3格式的接入信号后，在1ms内(即用于传输接入信号的传输时间间隔内)除接入信号占用的6个物理资源块外的其它频域资源无法被MESH网络用来发送数据，因此会造成用于传输接入信号的传输时间间隔内除接入信号占用的6个物理资源块以外的其它频域资源浪费。In the prior art, five types of access signals are defined: format0, 1, 2, 3, 4, and format 4 access signals have a coverage of only 2Km, which generally cannot meet network performance requirements, and therefore are not commonly used. However, the format of the format 0, 1, 2, and 3 access signals is widely used, and thus is widely used. In actual use, the access signal in format0, 1, 2, and 3 formats has a time length of at least 1 ms (Transmission Time Interval (TTI)), and occupies 6 resource blocks in the frequency domain. 1 is shown. Although the coverage of the format 0, 1, 2, and 3 format is large, after the access signal of the format 0, 1, 2, and 3 formats is applied in the MESH network, it is used to transmit the access signal within 1 ms. Within the transmission time interval, other frequency domain resources except the 6 physical resource blocks occupied by the access signal cannot be used by the MESH network to transmit data, and thus the transmission time interval for transmitting the access signal is divided by the access signal. Other frequency domain resources other than the occupied 6 physical resource blocks are wasted.
发明内容Summary of the invention
基于上述现有技术的缺陷和不足，本发明提出一种接入信号生产方法、装置及接入信号，采用本发明技术方案，生成接入信号的从节点只在用于传输接入信号的传输时间间隔的第二时隙生成接入信号，相应的，用于传输接入信号的传输时间间隔的第一时隙用来发送数据，提高了用于传输接入信号的传输时 间间隔的利用效率。Based on the above drawbacks and deficiencies of the prior art, the present invention provides an access signal production method, apparatus, and access signal. According to the technical solution of the present invention, a slave node that generates an access signal is only used for transmission of an access signal. The second time slot of the time interval generates an access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is used to transmit data, which improves the transmission time for transmitting the access signal. The efficiency of the use of the interval.
一种接入信号生成方法，应用于宽带MESH网络的从节点，所述从节点将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；该方法包括：An access signal generating method is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions; the method includes:
从所述设定数量的带宽区域中，选择一个带宽区域；Selecting a bandwidth region from the set number of bandwidth regions;
根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。An access signal is generated within the selected bandwidth region based on the frequency range of the selected bandwidth region.
优选地，所述将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域，包括：Preferably, the dividing the second time slot for transmitting the transmission time interval of the access signal into the set number of bandwidth regions comprises:
将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；Dividing a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。Dividing the access signal area into a set number of bandwidth areas; wherein an interval is set between adjacent bandwidth areas of the set number of bandwidth areas.
优选地，所述根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号，包括：Preferably, the generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region comprises:
根据所选择的带宽区域的频率范围，生成ZC序列；Generating a ZC sequence according to a frequency range of the selected bandwidth region;
根据所述ZC序列，在所选择的带宽区域内生成接入信号。An access signal is generated within the selected bandwidth region based on the ZC sequence.
优选地，所述根据所选择的带宽区域的频率范围，生成ZC序列，包括：Preferably, the generating a ZC sequence according to the frequency range of the selected bandwidth region comprises:
根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
一种接入信号生成装置，应用于宽带MESH网络的从节点，该装置包括：An access signal generating device is applied to a slave node of a broadband MESH network, the device comprising:
预处理单元，用于将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；a pre-processing unit, configured to divide a second time slot for transmitting a transmission time interval into a set number of bandwidth areas;
选择单元，用于从所述设定数量的带宽区域中，选择一个带宽区域；a selecting unit, configured to select one bandwidth region from the set number of bandwidth regions;
信号生成单元，用于根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。 And a signal generating unit, configured to generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
优选地，所述预处理单元，包括：Preferably, the preprocessing unit comprises:
第一处理单元，用于将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；a first processing unit, configured to divide a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
第二处理单元，用于将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。And a second processing unit, configured to divide the access signal area into a set number of bandwidth areas, where a bandwidth is set between adjacent bandwidth areas of the set number of bandwidth areas.
优选地，所述信号生成单元根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号时，具体用于：Preferably, the signal generating unit is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
根据所选择的带宽区域的频率范围，生成ZC序列；根据所述ZC序列，在所选择的带宽区域内生成接入信号。Generating a ZC sequence according to a frequency range of the selected bandwidth region; and generating an access signal in the selected bandwidth region according to the ZC sequence.
优选地，所述信号生成单元根据所选择的带宽区域的频率范围，生成ZC序列时，具体用于：Preferably, when the signal generating unit generates the ZC sequence according to the frequency range of the selected bandwidth region, the signal generating unit is specifically configured to:
根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
一种接入信号生成装置，包括：An access signal generating device includes:
存储器和处理器；Memory and processor;
其中所述存储器与所述处理器连接，用于存储程序及程序运行过程中产生的数据；Wherein the memory is connected to the processor for storing data generated during a program and a program running;
所述处理器，用于通过运行所述存储器中的程序，实现以下功能：The processor is configured to implement the following functions by running a program in the memory:
将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；从所述设定数量的带宽区域中，选择一个带宽区域；根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。Dividing a second time slot of a transmission time interval for transmitting an access signal into a set number of bandwidth regions; selecting a bandwidth region from the set number of bandwidth regions; according to a frequency range of the selected bandwidth region An access signal is generated within the selected bandwidth region.
优选地，所述处理器将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域时，具体用于：Preferably, when the processor divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidth regions, specifically:
将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。Dividing a second time slot for transmitting a transmission time interval into a guard interval area and an access signal area; dividing the access signal area into a set number of bandwidth areas; wherein the set quantity The bandwidth is set between adjacent bandwidth areas of the bandwidth area.
优选地，所述处理器根据所选择的带宽区域的频率范围，在所选择的带宽 区域内生成接入信号时，具体用于：Advantageously, said processor is in said selected bandwidth based on a frequency range of said selected bandwidth region When an access signal is generated in an area, it is specifically used to:
根据所选择的带宽区域的频率范围，生成ZC序列；根据所述ZC序列，在所选择的带宽区域内生成接入信号。Generating a ZC sequence according to a frequency range of the selected bandwidth region; and generating an access signal in the selected bandwidth region according to the ZC sequence.
优选地，所述处理器根据所选择的带宽区域的频率范围，生成ZC序列时，具体用于：Preferably, when the processor generates a ZC sequence according to the frequency range of the selected bandwidth region, specifically:
根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
一种接入信号，所述接入信号占用其所在的传输时间间隔的第二时隙的设定带宽区域，该接入信号包括：An access signal, the access signal occupies a set bandwidth area of a second time slot of a transmission time interval in which the access signal is located, and the access signal includes:
循环前缀、信号序列及位于所述信号序列之后的保护间隔。A cyclic prefix, a sequence of signals, and a guard interval located after the sequence of signals.
优选地，所述循环前缀的长度保证所述接入信号支持20Km的覆盖范围。Preferably, the length of the cyclic prefix ensures that the access signal supports a coverage of 20 Km.
本发明提出的接入信号生成方法，应用于宽带MESH网络的从节点，所述从节点将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；该方法包括：从所述设定数量的带宽区域中，选择一个带宽区域；根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。采用本发明技术方案，从节点只在用于传输接入信号的传输时间间隔的第二时隙内生成接入信号，相应的，用于传输接入信号的传输时间间隔的第一时隙即可用于发送数据，提高了用于传输接入信号的传输时间间隔的频域资源利用率。The access signal generating method of the present invention is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions; The method includes: selecting a bandwidth region from the set number of bandwidth regions; and generating an access signal in the selected bandwidth region according to the selected frequency region of the bandwidth region. With the technical solution of the present invention, the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is It can be used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting access signals.
附图说明DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.
图1是本发明实施例提供的接入信号所在的传输时间间隔的结构示意图；1 is a schematic structural diagram of a transmission time interval in which an access signal is provided according to an embodiment of the present invention;
图2是本发明实施例提供的另一种接入信号所在的传输时间间隔的结构示意图；2 is a schematic structural diagram of another transmission time interval in which an access signal is provided according to an embodiment of the present invention;
图3是本发明实施例提供的一种接入信号生成方法的流程示意图；3 is a schematic flowchart of a method for generating an access signal according to an embodiment of the present invention;
图4是本发明实施例提供的另一种接入信号生成方法的流程示意图； 4 is a schematic flowchart of another method for generating an access signal according to an embodiment of the present invention;
图5是本发明实施例提供的一种接入信号的结构示意图；FIG. 5 is a schematic structural diagram of an access signal according to an embodiment of the present disclosure;
图6是本发明实施例提供的一种接入信号生成装置的结构示意图；FIG. 6 is a schematic structural diagram of an access signal generating apparatus according to an embodiment of the present invention;
图7是本发明实施例提供的另一种接入信号生成装置的结构示意图；FIG. 7 is a schematic structural diagram of another access signal generating apparatus according to an embodiment of the present disclosure;
图8是本发明实施例提供的另一种接入信号生成装置的结构示意图。FIG. 8 is a schematic structural diagram of another access signal generating apparatus according to an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
本发明实施例公开了一种接入信号生成方法，应用于宽带MESH网络的从节点，所述从节点将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；The embodiment of the invention discloses an access signal generating method, which is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidths. region;
具体的，本发明实施例所涉及的从节点具体为待接入宽带MESH网络的从节点，该从节点接入网络时，在接收到网络主节点发送的同步信号后，需要通过自身占用的数据帧传输时间间隔，向网络中的主节点发送接入信号。为了便于待接入网络的从节点发送接入信号，系统分配该从节点占用具备接入信道的传输时间间隔，在现有技术中，具体为如图1所示的传输时间间隔。在本发明实施例技术方案中，与图1所示的用于传输接入信号的传输时间间隔资源划分方法不同，从节点将自身占用的用于传输接入信号的传输时间间隔，按照图2所示的传输时间间隔格式进行资源划分。由图2可知，在本发明实施例技术方案中，从节点只在自身占用的传输时间间隔的第二时隙内发送接入信号，而自身占用的传输时间间隔的第一时隙则用来发送数据。进一步的，本发明实施例中，从节点进一步将自身占用的传输时间间隔的第二时隙划分为设定数量的带宽区域，每一带宽区域作为一个接入信道用来传输接入信号。Specifically, the slave node involved in the embodiment of the present invention is specifically a slave node to be connected to the broadband MESH network. When the slave node accesses the network, after receiving the synchronization signal sent by the network master node, the slave node needs to use the data occupied by itself. The frame transmission time interval sends an access signal to the master node in the network. In order to facilitate the transmission of the access signal by the slave node of the network to be accessed, the system allocates the transmission time interval of the slave node to the access channel. In the prior art, the transmission time interval is as shown in FIG. 1 . In the technical solution of the embodiment of the present invention, different from the transmission time interval resource division method for transmitting an access signal shown in FIG. 1 , the transmission time interval used by the slave node for transmitting the access signal is according to FIG. 2 . The transmission time interval format shown is for resource partitioning. As shown in FIG. 2, in the technical solution of the embodiment of the present invention, the slave node transmits the access signal only in the second time slot of the transmission time interval occupied by itself, and the first time slot of the transmission time interval occupied by the slave node is used. send data. Further, in the embodiment of the present invention, the slave node further divides the second time slot of the transmission time interval occupied by the slave node into a set number of bandwidth regions, and each bandwidth region serves as an access channel for transmitting the access signal.
参见图3所示，本发明实施例提出的接入信号生成方法包括：As shown in FIG. 3, the method for generating an access signal according to an embodiment of the present invention includes:
S301、从所述设定数量的带宽区域中，选择一个带宽区域；S301. Select a bandwidth area from the set number of bandwidth areas.
具体的，从节点从已经划分好的，如图2所示的自身占用的传输时间间隔 的第二时隙的带宽区域(接入信道)中，随机选择一个带宽区域，用于传输接入信号。Specifically, the slave node has been divided, and the transmission time interval occupied by itself is as shown in FIG. 2. In the bandwidth area (access channel) of the second time slot, a bandwidth area is randomly selected for transmitting the access signal.
S302、根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。S302. Generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
具体的，如图2所示，从节点在自身占用的传输时间间隔的第二时隙内划分的带宽区域，分别占用第二时隙的不同频率范围。当从节点选择任意一个带宽区域后，根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号，也就是说，从节点在所选择的带宽区域内发送接入信号。基于从节点生成接入信号的带宽区域的时频资源限制，从节点生成的接入信号并不会占用从节点所占用的传输时间间隔的第一时隙的时频资源，因此，第一时隙可以用于数据传输，提高了宽带MESH网络中用于传输接入信号的传输时间间隔的频域资源利用率。Specifically, as shown in FIG. 2, the bandwidth area divided by the node in the second time slot of the transmission time interval occupied by the node respectively occupies different frequency ranges of the second time slot. After the slave node selects any one of the bandwidth regions, an access signal is generated in the selected bandwidth region according to the frequency range of the selected bandwidth region, that is, the slave node transmits the access signal in the selected bandwidth region. Based on the time-frequency resource limitation of the bandwidth region in which the access signal is generated from the node, the access signal generated by the slave node does not occupy the time-frequency resource of the first time slot of the transmission time interval occupied by the node, and therefore, the first time The slot can be used for data transmission, which improves the frequency domain resource utilization of the transmission time interval for transmitting the access signal in the broadband MESH network.
本发明实施例提出的接入信号生成方法，应用于宽带MESH网络的从节点，所述从节点将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；该方法包括：从所述设定数量的带宽区域中，选择一个带宽区域；根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。采用本发明技术方案，从节点只在用于传输接入信号的传输时间间隔的第二时隙内生成接入信号，相应的，用于传输接入信号的传输时间间隔的第一时隙即可用于发送数据，提高了用于传输接入信号的传输时间间隔的频域资源利用率。The access signal generating method of the embodiment of the present invention is applied to a slave node of a broadband MESH network, and the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions; The method includes selecting a bandwidth region from the set number of bandwidth regions, and generating an access signal in the selected bandwidth region according to a frequency range of the selected bandwidth region. With the technical solution of the present invention, the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is It can be used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting access signals.
可选的，在本发明的另一个实施例中，所述将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域，包括：Optionally, in another embodiment of the present invention, the dividing the second time slot for transmitting the transmission time interval of the access signal into the set number of bandwidth regions, includes:
将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；Dividing a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
具体的，参见图2所示，从节点在对自身占用的传输时间间隔的第二时隙进行划分的时候，具体在第二时隙中划分出保护间隔区域和接入信号区域。其中，保护间隔区域处于接入信号区域和第一时隙之间，在实际数据传输过程中，保护间隔内不传输数据，其具体作用是将第一时隙的通信数据和接入信号区域 的接入信号隔开，避免双方相互干扰。Specifically, as shown in FIG. 2, when the slave node divides the second time slot of the transmission time interval occupied by the slave node, the guard interval zone and the access signal zone are specifically divided in the second time slot. The guard interval area is between the access signal area and the first time slot. During the actual data transmission process, no data is transmitted within the guard interval, and the specific role is to transmit the communication data and the access signal area of the first time slot. The access signals are separated to avoid mutual interference.
接入信号区域具体用于传输接入信号。从节点只能在划分的接入信号区域内生成并传输接入信号。The access signal area is specifically used to transmit an access signal. The slave node can only generate and transmit access signals within the divided access signal regions.
将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。Dividing the access signal area into a set number of bandwidth areas; wherein an interval is set between adjacent bandwidth areas of the set number of bandwidth areas.
具体的，从节点进一步对划分出的接入信号区域进行频域资源划分，得到多个带宽区域。并且，为了明确区分各个带宽区域，从节点在接入信号区域内划分带宽区域时，设置相邻的带宽区域之间间隔设定带宽。Specifically, the slave node further performs frequency domain resource division on the divided access signal regions to obtain multiple bandwidth regions. Moreover, in order to clearly distinguish each bandwidth region, when the slave node divides the bandwidth region in the access signal region, the interval between the adjacent bandwidth regions is set to set the bandwidth.
例如，从节点在自身占用的传输时间间隔的第二时隙内划分出6个符号的时间区域作为接入信号区域。进一步的，从节点对接入信号区域进行频域资源划分，得到多个带宽区域。例如，从节点在接入信号区域内划分每个带宽区域在频率上占用N个资源单元，N＝297或149，其中每个资源单元间隔7.5kHz，也就是相邻带宽区域间隔7.5kHz。基于上述划分方法，如果宽带MESH网络的带宽为5M，则从接入信号区域可划分出2组带宽区域供随机选择；如果宽带MESH网络的带宽为10M，则从接入信号区域可划分出4组带宽区域供随机选择。For example, the slave node divides a time zone of 6 symbols into the access signal region in the second time slot of the transmission time interval occupied by the node. Further, the slave node performs frequency domain resource division on the access signal region to obtain multiple bandwidth regions. For example, the slave node divides each bandwidth region within the access signal region to occupy N resource units in frequency, N=297 or 149, where each resource unit is spaced 7.5 kHz, that is, the adjacent bandwidth region is spaced 7.5 kHz apart. Based on the above division method, if the bandwidth of the broadband MESH network is 5M, two sets of bandwidth regions can be divided from the access signal region for random selection; if the bandwidth of the broadband MESH network is 10M, the access signal region can be divided into 4 The group bandwidth area is available for random selection.
可选的，在本发明的另一个实施例中，参见图4所示，所述根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号，包括：Optionally, in another embodiment of the present invention, as shown in FIG. 4, the generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region includes:
S402、根据所选择的带宽区域的频率范围，生成ZC序列；S402. Generate a ZC sequence according to a frequency range of the selected bandwidth region.
具体的，在本发明实施例中，从节点生成的接入信号的结构如图5所示，具体包括循环前缀、信号序列和保护间隔。其中，循环前缀与信号序列为相同的序列；保护间隔为空，用于防止与其它信号发生混叠。在本发明实施例中，循环前缀和信号序列采用ZC序列。具体的，ZC序列的定义为：Specifically, in the embodiment of the present invention, the structure of the access signal generated by the node is as shown in FIG. 5, and specifically includes a cyclic prefix, a signal sequence, and a guard interval. The cyclic prefix and the signal sequence are the same sequence; the guard interval is empty to prevent aliasing with other signals. In an embodiment of the invention, the cyclic prefix and the signal sequence employ a ZC sequence. Specifically, the ZC sequence is defined as:
Figure PCTCN2017101182-appb-000001
Figure PCTCN2017101182-appb-000001
从节点根据所选择的带宽区域的频率范围，生成相应的ZC序列。The slave node generates a corresponding ZC sequence according to the frequency range of the selected bandwidth region.
需要说明的是，本发明实施例仅以ZC序列为例对接入信号进行说明，在 本领域，可以选择任意可用的序列生成接入信号。本发明仅对接入信号的位置进行限定，并不限定接入信号具体序列形式，任意可用的用于得到接入信号的序列，都在本发明实施例保护范围内。It should be noted that the embodiment of the present invention only uses the ZC sequence as an example to describe the access signal. In the art, any available sequence can be selected to generate an access signal. The present invention only defines the location of the access signal, and does not limit the specific sequence of the access signal. Any available sequence for obtaining the access signal is within the protection scope of the embodiment of the present invention.
S403、根据所述ZC序列，在所选择的带宽区域内生成接入信号。S403. Generate an access signal in the selected bandwidth region according to the ZC sequence.
结合上述ZC序列的定义，接入节点根据所选择的带宽区域的频率范围，将ZC序列映射到该频率范围内，得到接入信号。In combination with the definition of the ZC sequence, the access node maps the ZC sequence into the frequency range according to the frequency range of the selected bandwidth region, and obtains an access signal.
需要说明的是，不同的带宽区域对应着不同的资源单元集合，例如当Nzc＝293，且宽带MESH网络的带宽为10M时，不同带宽区域对应的资源单元如表1所示：It should be noted that different bandwidth regions correspond to different resource unit sets. For example, when Nzc=293 and the bandwidth of the broadband MESH network is 10M, the resource units corresponding to different bandwidth regions are as shown in Table 1:
表1Table 1
Preamble idPreamble id startIdxstartIdx endIdxendIdx
00 11 293293
11 301301 593593
22 601601 893893
33 901901 11931193
其中，表1中的Preamble id表示不同的带宽区域编号，startIdx表示起始资源单元，endIdx表示末尾资源单元。The Preamble id in Table 1 indicates different bandwidth area numbers, startIdx indicates the starting resource unit, and endIdx indicates the last resource unit.
从节点将ZC序列经OFDM调制后，得到接入信号：After the slave node modulates the ZC sequence through OFDM, an access signal is obtained:
Figure PCTCN2017101182-appb-000002
Figure PCTCN2017101182-appb-000002
其中，Tcp代表循环前缀CP的时间长度；
Figure PCTCN2017101182-appb-000003
表示序列发送时的资源单元数量。Where T cp represents the length of time of the cyclic prefix CP;
Figure PCTCN2017101182-appb-000003
Indicates the number of resource units at the time the sequence was sent.
从节点根据所选择的带宽区域的频率范围，确定上述公式中的startIdx和endIdx，进一步的，从节点将ZC序列映射到相应的频率范围内。 The slave node determines startIdx and endIdx in the above formula according to the frequency range of the selected bandwidth region. Further, the slave node maps the ZC sequence into the corresponding frequency range.
本实施例中的步骤S401对应图3所示的方法的实施例中的步骤S301，其具体内容请参见对应图1所示的方法的实施例的内容，此处不再赘述。The step S401 in this embodiment corresponds to the step S301 in the embodiment of the method shown in FIG. 3 . For details, refer to the content of the embodiment corresponding to the method shown in FIG. 1 , and details are not described herein again.
可选的，在本发明的另一个实施例中，所述根据所选择的带宽区域的频率范围，生成ZC序列，包括：Optionally, in another embodiment of the present invention, the generating a ZC sequence according to a frequency range of the selected bandwidth region includes:
根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
具体的，接入信号的覆盖范围由其循环前缀的时间长度确定。为了扩大宽带MESH网络的主节点与从节点之间的通信距离，本发明实施例设置从节点发送的接入信号的覆盖范围为20Km。相应的，对接入信号的循环前缀的时间长度进行设置，即可保证接入信号覆盖范围。具体的，在实际实施过程中，本发明实施例按照覆盖范围为20Km的接入信号对应的ZC序列的时间长度生成ZC序列。Specifically, the coverage of the access signal is determined by the length of time of its cyclic prefix. In order to expand the communication distance between the master node and the slave node of the broadband MESH network, the embodiment of the present invention sets the coverage of the access signal sent by the node to be 20 Km. Correspondingly, the time length of the cyclic prefix of the access signal is set to ensure the coverage of the access signal. Specifically, in an actual implementation, the embodiment of the present invention generates a ZC sequence according to the length of time of the ZC sequence corresponding to the access signal with a coverage of 20Km.
本发明实施例公开了一种接入信号生成装置，应用于宽带MESH网络的从节点，参见图6所示，该装置包括：The embodiment of the invention discloses an access signal generating device, which is applied to a slave node of a broadband MESH network. Referring to FIG. 6, the device includes:
预处理单元601，用于将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；The pre-processing unit 601 is configured to divide a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth areas;
选择单元602，用于从所述设定数量的带宽区域中，选择一个带宽区域；The selecting unit 602 is configured to select one bandwidth area from the set number of bandwidth areas;
信号生成单元603，用于根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。The signal generating unit 603 is configured to generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
具体的，本实施例中各个单元的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。For details of the specific working content of each unit in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
本发明实施例提出的接入信号生成装置，应用于宽带MESH网络的从节点，所述装置的预处理单元601将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；在该装置生成接入信号时，选择单元602首先从所述设定数量的带宽区域中，选择一个带宽区域；然后信号生成单元603根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。采用本发明技术方案，从节点只在用于传输接入信号的传输时间间隔的第二时隙内生成接入信号，相应的，用于传输接入信号的传输时间间隔的第一时隙即可 用于发送数据，提高了用于传输接入信号的传输时间间隔的频域资源利用率。The access signal generating apparatus according to the embodiment of the present invention is applied to a slave node of a broadband MESH network, and the pre-processing unit 601 of the apparatus divides the second time slot for transmitting the transmission time interval of the access signal into a set number. a bandwidth area; when the apparatus generates an access signal, the selecting unit 602 first selects a bandwidth area from the set number of bandwidth areas; then the signal generating unit 603 selects a frequency range according to the selected bandwidth area. An access signal is generated within the selected bandwidth region. With the technical solution of the present invention, the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is Can It is used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting the access signal.
可选的，在本发明的另一个实施例中，参见图7所示，预处理单元601，包括：Optionally, in another embodiment of the present invention, as shown in FIG. 7, the pre-processing unit 601 includes:
第一处理单元6011，用于将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；The first processing unit 6011 is configured to divide a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
第二处理单元6012，用于将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。The second processing unit 6012 is configured to divide the access signal area into a set number of bandwidth areas, where a bandwidth is set between adjacent bandwidth areas of the set number of bandwidth areas.
具体的，本实施例中各个单元的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。For details of the specific working content of each unit in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
可选的，在本发明的另一个实施例中，信号生成单元603根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号时，具体用于：Optionally, in another embodiment of the present invention, the signal generating unit 603 is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
根据所选择的带宽区域的频率范围，生成ZC序列；根据所述ZC序列，在所选择的带宽区域内生成接入信号。Generating a ZC sequence according to a frequency range of the selected bandwidth region; and generating an access signal in the selected bandwidth region according to the ZC sequence.
具体的，本实施例中信号生成单元603的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。Specifically, for the specific working content of the signal generating unit 603 in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
可选的，在本发明的另一个实施例中，信号生成单元603根据所选择的带宽区域的频率范围，生成ZC序列时，具体用于：Optionally, in another embodiment of the present invention, the signal generating unit 603 is configured to: when generating a ZC sequence according to the frequency range of the selected bandwidth region, specifically:
根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
具体的，本实施例中信号生成单元603的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。Specifically, for the specific working content of the signal generating unit 603 in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
本发明实施例还公开了另一种接入信号生成装置，应用于宽带MESH网络的从节点，参见图8所示，包括：Another embodiment of the present invention further discloses an access signal generating apparatus, which is applied to a slave node of a broadband MESH network. As shown in FIG. 8, the method includes:
存储器801和处理器802； Memory 801 and processor 802;
其中存储器801与处理器802连接，用于存储程序及程序运行过程中产生的数据；The memory 801 is connected to the processor 802, and is configured to store data generated during the running of the program and the program;
处理器802，用于通过运行所述存储器中的程序，实现以下功能： The processor 802 is configured to implement the following functions by running a program in the memory:
将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；从所述设定数量的带宽区域中，选择一个带宽区域；根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。Dividing a second time slot of a transmission time interval for transmitting an access signal into a set number of bandwidth regions; selecting a bandwidth region from the set number of bandwidth regions; according to a frequency range of the selected bandwidth region An access signal is generated within the selected bandwidth region.
具体的，本实施例中各个部分的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。Specifically, for the specific working content of each part in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
本发明实施例提出的接入信号生成装置，应用于宽带MESH网络的从节点，该装置的处理器802将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；在生成接入信号时，处理器802首先从所述设定数量的带宽区域中，选择一个带宽区域；然后根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。采用本发明技术方案，从节点只在用于传输接入信号的传输时间间隔的第二时隙内生成接入信号，相应的，用于传输接入信号的传输时间间隔的第一时隙即可用于发送数据，提高了用于传输接入信号的传输时间间隔的频域资源利用率。The access signal generating apparatus according to the embodiment of the present invention is applied to a slave node of a broadband MESH network, and the processor 802 of the apparatus divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidths. a region; when generating an access signal, the processor 802 first selects a bandwidth region from the set number of bandwidth regions; and then generates an access in the selected bandwidth region according to the selected frequency region of the bandwidth region signal. With the technical solution of the present invention, the slave node generates an access signal only in the second time slot of the transmission time interval for transmitting the access signal, and correspondingly, the first time slot for transmitting the transmission time interval of the access signal is It can be used to transmit data and improve the frequency domain resource utilization of the transmission time interval for transmitting access signals.
可选的，在本发明的另一个实施例中，处理器802将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域时，具体用于：Optionally, in another embodiment of the present invention, when the processor 802 divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidth regions, specifically, the:
将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。Dividing a second time slot for transmitting a transmission time interval into a guard interval area and an access signal area; dividing the access signal area into a set number of bandwidth areas; wherein the set quantity The bandwidth is set between adjacent bandwidth areas of the bandwidth area.
具体的，本实施例中处理器802的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。Specifically, for the specific working content of the processor 802 in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
可选的，在本发明的另一个实施例中，处理器802根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号时，具体用于：Optionally, in another embodiment of the present invention, the processor 802 is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
根据所选择的带宽区域的频率范围，生成ZC序列；根据所述ZC序列，在所选择的带宽区域内生成接入信号。Generating a ZC sequence according to a frequency range of the selected bandwidth region; and generating an access signal in the selected bandwidth region according to the ZC sequence.
具体的，本实施例中处理器802的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。Specifically, for the specific working content of the processor 802 in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
可选的，在本发明的另一个实施例中，处理器802根据所选择的带宽区域 的频率范围，生成ZC序列时，具体用于：Optionally, in another embodiment of the present invention, the processor 802 is configured according to the selected bandwidth region. The frequency range, when generating the ZC sequence, is specifically used to:
根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
具体的，本实施例中处理器802的具体工作内容，请参见对应的方法实施例的内容，此处不再赘述。Specifically, for the specific working content of the processor 802 in this embodiment, refer to the content of the corresponding method embodiment, and details are not described herein again.
本发明实施例公开了一种接入信号，所述接入信号占用其所在的传输时间间隔的第二时隙的设定带宽区域，参见图5所示，该接入信号包括：An embodiment of the present invention discloses an access signal, where the access signal occupies a set bandwidth region of a second time slot of a transmission time interval in which the access signal is located. As shown in FIG. 5, the access signal includes:
循环前缀501、信号序列502及位于所述信号序列之后的保护间隔503。A cyclic prefix 501, a signal sequence 502, and a guard interval 503 located after the sequence of signals.
具体的，接入信号占用从节点所占用的传输时间间隔的第二时隙的6个符号，在频域上，占用N个资源单元，N＝297或149，其中每个资源单元间隔7.5kHz。其中，循环前缀与信号序列为相同的序列；保护间隔为空，用于防止与其它信号发生混叠。在本发明实施例中，循环前缀和信号序列采用ZC序列。具体的，ZC序列的定义为：Specifically, the access signal occupies 6 symbols of the second time slot of the transmission time interval occupied by the node, and in the frequency domain, occupies N resource units, N=297 or 149, wherein each resource unit is separated by 7.5 kHz. . The cyclic prefix and the signal sequence are the same sequence; the guard interval is empty to prevent aliasing with other signals. In an embodiment of the invention, the cyclic prefix and the signal sequence employ a ZC sequence. Specifically, the ZC sequence is defined as:
Figure PCTCN2017101182-appb-000004
Figure PCTCN2017101182-appb-000004
结合上述ZC序列的定义，接入节点根据所选择的带宽区域的频率范围，将ZC序列映射到该频率范围内，得到接入信号。In combination with the definition of the ZC sequence, the access node maps the ZC sequence into the frequency range according to the frequency range of the selected bandwidth region, and obtains an access signal.
需要说明的是，不同的带宽区域对应着不同的资源单元集合，例如当Nzc＝293，且宽带MESH网络的带宽为10M时，不同带宽区域对应的资源单元如表1所示：It should be noted that different bandwidth regions correspond to different resource unit sets. For example, when Nzc=293 and the bandwidth of the broadband MESH network is 10M, the resource units corresponding to different bandwidth regions are as shown in Table 1:
表1Table 1
Preamble idPreamble id startIdxstartIdx endIdxendIdx
00 11 293293
11 301301 593593
22 601601 893893
33 901901 11931193
其中，表1中的Preamble id表示不同的带宽区域编号，startIdx表示起始资源单元，endIdx表示末尾资源单元。The Preamble id in Table 1 indicates different bandwidth area numbers, startIdx indicates the starting resource unit, and endIdx indicates the last resource unit.
从节点将ZC序列经OFDM调制后，得到接入信号：After the slave node modulates the ZC sequence through OFDM, an access signal is obtained:
Figure PCTCN2017101182-appb-000005
Figure PCTCN2017101182-appb-000005
从节点根据所选择的带宽区域的频率范围，确定上述公式中的startIdx和endIdx，进一步的，从节点将ZC序列映射到相应的频率范围内。The slave node determines startIdx and endIdx in the above formula according to the frequency range of the selected bandwidth region. Further, the slave node maps the ZC sequence into the corresponding frequency range.
本发明实施例提出的接入信号，占用其所在的传输时间间隔的第二时隙的设定带宽区域，具体包括循环前缀501、信号序列502及位于所述信号序列之后的保护间隔503。将该接入信号用于宽带MESH网络，其所在的传输时间间隔的第一时隙可以留作发送数据使用，可提高用于传输接入信号的传输时间间隔的频域资源利用率。The access signal proposed by the embodiment of the present invention occupies a set bandwidth region of the second time slot of the transmission time interval in which the access signal is located, and specifically includes a cyclic prefix 501, a signal sequence 502, and a guard interval 503 located after the signal sequence. The access signal is used in the broadband MESH network, and the first time slot of the transmission time interval in which the access signal is located can be reserved for transmitting data, which can improve the frequency domain resource utilization rate for transmitting the transmission time interval of the access signal.
可选的，在本发明的另一个实施例中，所述循环前缀的长度保证所述接入信号支持20Km的覆盖范围。Optionally, in another embodiment of the present invention, the length of the cyclic prefix ensures that the access signal supports a coverage of 20Km.
具体的，接入信号的覆盖范围由其循环前缀的时间长度确定。为了扩大宽带MESH网络的主节点与从节点之间的通信距离，本发明实施例设置从节点发送的接入信号的覆盖范围为20Km。相应的，对接入信号的循环前缀的时间长度进行设置，即可保证接入信号覆盖范围。具体的，在实际实施过程中，本发明实施例按照覆盖范围为20Km的接入信号对应的ZC序列的时间长度生成ZC序列。Specifically, the coverage of the access signal is determined by the length of time of its cyclic prefix. In order to expand the communication distance between the master node and the slave node of the broadband MESH network, the embodiment of the present invention sets the coverage of the access signal sent by the node to be 20 Km. Correspondingly, the time length of the cyclic prefix of the access signal is set to ensure the coverage of the access signal. Specifically, in an actual implementation, the embodiment of the present invention generates a ZC sequence according to the length of time of the ZC sequence corresponding to the access signal with a coverage of 20Km.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。 The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims (12)

  1. 一种接入信号生成方法，其特征在于，应用于宽带MESH网络的从节点，所述从节点将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；该方法包括：An access signal generating method, which is applied to a slave node of a broadband MESH network, wherein the slave node divides a second time slot for transmitting a transmission time interval of the access signal into a set number of bandwidth regions; The method includes:
    从所述设定数量的带宽区域中，选择一个带宽区域；Selecting a bandwidth region from the set number of bandwidth regions;
    根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。An access signal is generated within the selected bandwidth region based on the frequency range of the selected bandwidth region.
  2. 根据权利要求1所述的方法，其特征在于，所述将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域，包括：The method according to claim 1, wherein the dividing the second time slot for transmitting the transmission time interval of the access signal into the set number of bandwidth regions comprises:
    将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；Dividing a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
    将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。Dividing the access signal area into a set number of bandwidth areas; wherein an interval is set between adjacent bandwidth areas of the set number of bandwidth areas.
  3. 根据权利要求1所述的方法，其特征在于，所述根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号，包括：The method according to claim 1, wherein the generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region comprises:
    根据所选择的带宽区域的频率范围，生成ZC序列；Generating a ZC sequence according to a frequency range of the selected bandwidth region;
    根据所述ZC序列，在所选择的带宽区域内生成接入信号。An access signal is generated within the selected bandwidth region based on the ZC sequence.
  4. 根据权利要求3所述的方法，其特征在于，所述根据所选择的带宽区域的频率范围，生成ZC序列，包括：The method according to claim 3, wherein the generating a ZC sequence according to a frequency range of the selected bandwidth region comprises:
    根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  5. 一种接入信号生成装置，其特征在于，应用于宽带MESH网络的从节点，该装置包括：An access signal generating apparatus is characterized by being applied to a slave node of a broadband MESH network, the apparatus comprising:
    预处理单元，用于将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；a pre-processing unit, configured to divide a second time slot for transmitting a transmission time interval into a set number of bandwidth areas;
    选择单元，用于从所述设定数量的带宽区域中，选择一个带宽区域； a selecting unit, configured to select one bandwidth region from the set number of bandwidth regions;
    信号生成单元，用于根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。And a signal generating unit, configured to generate an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region.
  6. 根据权利要求5所述的装置，其特征在于，所述预处理单元，包括：The apparatus according to claim 5, wherein the preprocessing unit comprises:
    第一处理单元，用于将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和接入信号区域；a first processing unit, configured to divide a second time slot for transmitting a transmission time interval of the access signal into a guard interval area and an access signal area;
    第二处理单元，用于将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。And a second processing unit, configured to divide the access signal area into a set number of bandwidth areas, where a bandwidth is set between adjacent bandwidth areas of the set number of bandwidth areas.
  7. 根据权利要求5所述的装置，其特征在于，所述信号生成单元根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号时，具体用于：The device according to claim 5, wherein the signal generating unit is configured to: when generating an access signal in the selected bandwidth region according to the frequency range of the selected bandwidth region, specifically:
    根据所选择的带宽区域的频率范围，生成ZC序列；根据所述ZC序列，在所选择的带宽区域内生成接入信号。Generating a ZC sequence according to a frequency range of the selected bandwidth region; and generating an access signal in the selected bandwidth region according to the ZC sequence.
  8. 根据权利要求7所述的装置，其特征在于，所述信号生成单元根据所选择的带宽区域的频率范围，生成ZC序列时，具体用于：The apparatus according to claim 7, wherein the signal generating unit generates a ZC sequence according to a frequency range of the selected bandwidth region, specifically for:
    根据所选择的带宽区域的频率范围，生成设定长度的ZC序列；其中，根据所述设定长度的ZC序列生成的接入信号支持20Km的覆盖范围。A ZC sequence of a set length is generated according to the frequency range of the selected bandwidth region; wherein the access signal generated according to the ZC sequence of the set length supports a coverage of 20Km.
  9. 一种接入信号生成装置，其特征在于，包括：An access signal generating device, comprising:
    存储器和处理器；Memory and processor;
    其中所述存储器与所述处理器连接，用于存储程序及程序运行过程中产生的数据；Wherein the memory is connected to the processor for storing data generated during a program and a program running;
    所述处理器，用于通过运行所述存储器中的程序，实现以下功能：The processor is configured to implement the following functions by running a program in the memory:
    将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域；从所述设定数量的带宽区域中，选择一个带宽区域；根据所选择的带宽区域的频率范围，在所选择的带宽区域内生成接入信号。Dividing a second time slot of a transmission time interval for transmitting an access signal into a set number of bandwidth regions; selecting a bandwidth region from the set number of bandwidth regions; according to a frequency range of the selected bandwidth region An access signal is generated within the selected bandwidth region.
  10. 根据权利要求9所述的装置，其特征在于，所述处理器将用于传输接入信号的传输时间间隔的第二时隙划分为设定数量的带宽区域时，具体用于：The device according to claim 9, wherein when the processor divides the second time slot for transmitting the transmission time interval of the access signal into a set number of bandwidth regions, specifically:
    将用于传输接入信号的传输时间间隔的第二时隙划分为保护间隔区域和 接入信号区域；将所述接入信号区域划分为设定数量的带宽区域；其中，所述设定数量的带宽区域的相邻带宽区域之间间隔设定带宽。Dividing a second time slot of a transmission time interval for transmitting an access signal into a guard interval area and And accessing the signal area; dividing the access signal area into a set number of bandwidth areas; wherein the set bandwidth of the adjacent bandwidth areas of the set number of bandwidth areas is set.
  11. 一种接入信号，其特征在于，所述接入信号占用其所在的传输时间间隔的第二时隙的设定带宽区域，该接入信号包括：An access signal, characterized in that the access signal occupies a set bandwidth area of a second time slot of a transmission time interval in which the access signal is located, and the access signal includes:
    循环前缀、信号序列及位于所述信号序列之后的保护间隔。A cyclic prefix, a sequence of signals, and a guard interval located after the sequence of signals.
  12. 根据权利要求11所述的接入信号，其特征在于，所述循环前缀的长度保证所述接入信号支持20Km的覆盖范围。 The access signal according to claim 11, wherein the length of the cyclic prefix ensures that the access signal supports a coverage of 20Km.
PCT/CN2017/101182 2017-09-11 2017-09-11 Access signal generating method and device and access signal WO2019047202A1 (en)

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CN101166352A (en) * 2006-10-18 2008-04-23 中兴通讯股份有限公司 An uplink random access method and its realization device and method
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