CN103634785B

CN103634785B - Radio Network System

Info

Publication number: CN103634785B
Application number: CN201310420390.3A
Authority: CN
Inventors: 胡应添
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2016-09-28
Anticipated expiration: 2033-09-13
Also published as: CN103634785A

Abstract

The invention discloses a kind of Radio Network System, prior art can only be transmitted by cable network between BBR and RRU of Radio Network System in order to solving, it is not suitable for outlying district and is not easy to lay the application scenarios of cable network, and the problem that Radio Network System is limited to pass through optical fiber private network and core network communications.This system includes: the SGW being connected with LTE system core net by public network and security gateway, SGW connects at least one Wireless Access Unit RAU by security gateway, each RAU is connected to LTE core network also by security gateway, RAU connects an ODU, microwave communication is carried out by an ODU and the 2nd ODU between far-end capping unit RRU connection the 2nd ODU, RAU and RRU.

Description

Wireless network system

Technical Field

The present invention relates to a mobile communication system, and more particularly, to a wireless network system.

Background

The 3G Network includes a Long Term Evolution (LTE) core Network and a Radio access Network, and the Radio access Network includes a plurality of Radio Network Systems (RNS). As shown in fig. 1, an RNS includes a Network Controller (RNC) and a plurality of base stations (Node B). The implementation mode of the Base station comprises a distributed Base station, wherein a Base Band Unit (BBU) and a Radio frequency Unit (RRU) in the Base station are separated and connected through an optical fiber.

The BBU is accessed to an LTE core network through an RNC, and mainly implements conversion between data and signaling in a mobile communication process and a baseband signal for a Mobile Station (MS).

The RRU mainly converts a baseband signal from the BBU into a radio frequency signal, sends the radio frequency signal to the MS through an antenna port, achieves wireless coverage of the signal, receives an uplink radio frequency signal from the MS, converts the uplink radio frequency signal into the baseband signal, and sends the baseband signal to the BBU.

However, in the above network architecture, the BBU and the RRU need to communicate with each other through a wired network, which is not suitable for an application scenario in which a wired network is not suitable for being laid in a remote area, and the wireless network system needs to communicate with the core network through a dedicated optical fiber network, which may result in that the wireless network system cannot communicate with the core network when the dedicated optical fiber network fails or the dedicated network is not in place for transmission.

Therefore, in the existing wireless network system, there are problems that the application scenarios are not suitable for remote areas and the communication with the core network is limited only through the optical fiber private network.

Disclosure of Invention

In view of this, an embodiment of the present invention provides a wireless network system, so as to solve the problems that in the prior art, a BBU and an RRU of the wireless network system can only transmit via a wired network, and are not suitable for an application scenario in which a wired network is not conveniently laid in a remote area, and the wireless network system is limited to only communicate with a core network via a dedicated optical fiber network.

The technical scheme of the embodiment of the invention is as follows:

a wireless network system, comprising: the system comprises a signaling gateway and a security gateway which are connected with an LTE system core network through a public network, wherein the signaling gateway is connected with at least one Radio Access Unit (RAU) through the security gateway, each RAU is also connected to the LTE core network through the security gateway, the RAU is connected with a first microwave outdoor transmission device (ODU, Out-Door Unit), a Remote coverage Unit (RRU, Remote radio Unit) is connected with a second ODU, and the RAU and the RRU are in microwave communication through the first ODU and the second ODU;

the signaling gateway is connected with the LTE core network through an S1-MME interface, the security gateway is connected with the signaling gateway through an S1-MME interface, the security gateway is connected with the LTE core network through an S1-U interface, the RAU communicates with the signaling gateway through an S1-MME interface, and the RAU is connected with the security gateway through an S1-U interface; wherein,

the signaling gateway is used for converging and forwarding the signaling in the communication process of the MS between the LTE core network and the RAU;

the safety gateway is used for carrying out safety detection on the signaling of the communication between the signaling gateway and the RAU and the data of the communication between the LTE core network and the RAU;

the RAU is used for converting signaling in the communication process of the MS which is from the signaling gateway and is detected through the security gateway and data in the communication process of the MS which is from the LTE core network and is detected through the security gateway into baseband signals, converting the converted baseband signals into analog signals and sending the analog signals to the first ODU; receiving an analog signal from the first ODU, converting the analog signal into a baseband signal, converting the converted baseband signal into signaling and data, sending the converted signaling to a signaling gateway, and sending the converted data to an LTE core network;

the first ODU is used for converting the analog signals from the RAU into radio frequency signals and sending the radio frequency signals to the second ODU; receiving a radio frequency signal from the second ODU, converting the received radio frequency signal into an analog signal, and sending the analog signal to the RAU;

the second ODU is used for receiving the radio frequency signal from the first ODU, converting the radio frequency signal into an analog signal and sending the analog signal to the RRU; receiving an analog signal from an RRU, converting the analog signal into a radio frequency signal, and sending the radio frequency signal to a first ODU;

the RRU is used for converting the analog signal from the second ODU into a baseband signal, converting the baseband signal into a radio frequency signal and sending the radio frequency signal to the MS; receiving a radio frequency signal from the MS, converting the received radio frequency signal into a baseband signal, converting the baseband signal into an analog signal, and sending the analog signal obtained by the conversion to the second ODU.

Preferably, the system further comprises: the security gateway is connected to the third IDU, the third IDU is connected to the third ODU, the RAU further comprises a fourth IDU, and the fourth IDU is connected to the fourth ODU;

a third IDU, which converts the signaling or data detected by the security gateway into an analog signal and sends the analog signal obtained by conversion to a third ODU; converting the analog signal from the third ODU into a signaling or data and sending the signaling or data to a security gateway;

the third ODU converts the analog signal from the third IDU into a radio frequency signal and sends the radio frequency signal to a fourth ODU in a microwave communication mode; converting the radio frequency signal from the fourth ODU into an analog signal, and transmitting the analog signal obtained by the conversion to a third IDU;

a fourth ODU that converts the radio frequency signal from the third ODU into an analog signal and sends the analog signal obtained by the conversion to a fourth IDU of the RAU; converting an analog signal of a fourth IDU from the RAU into a radio frequency signal, and sending the radio frequency signal obtained by conversion to a third ODU in a microwave communication mode;

a fourth IDU of the RAU, which converts the analog signal from the fourth ODU into signaling or data, and sends the signaling or data obtained by conversion to the digital signal processing module of the RAU; and converting signaling or data from the digital signal processing module of the RAU into an analog signal, and sending the analog signal obtained by conversion to a fourth ODU.

The signaling gateway is connected with the LTE core network through an S1-MME interface, the security gateway is connected with the signaling gateway through an S1-MME interface, the security gateway is connected with the LTE core network through an S1-U interface, the RAU is connected with the signaling gateway through an S1-MME interface, and the RAU is connected with the security gateway through an S1-U interface.

Preferably, the RAU is further configured to perform radio resource management, scheduling management, radio access control, and mobility management for communication of the MS;

preferably, the system further comprises a network management unit; the network management unit realizes the functions of user interface management, user group management, software management, log management, system maintenance, parameter setting and alarm reporting of the signaling gateway, the security gateway, the RAU and the RRU.

In an embodiment of the present invention, a structure of a wireless network system is provided, where the system includes: the system comprises a signaling gateway and a security gateway which are connected with an LTE system core network through a public network, wherein the signaling gateway is connected with at least one RAU through the security gateway, the signaling gateway converges and forwards signaling in the communication process of the MS between the LTE core network and the RAU, each RAU is also connected to the LTE core network through the security gateway, the RAU is connected with a first ODU, the RRU is connected with a second ODU, the RAU is directly communicated with the LTE core network, the signaling and data communicated with the LTE core network are subjected to digital baseband processing, the RRU is used for performing remote access on the MS, and the RAU and the RRU are in microwave communication through the first ODU and the second ODU; therefore, the embodiment of the invention is provided with the first microwave transmission device and the second microwave transmission device to realize the wireless communication between the RAU and the RRU, can be suitable for application scenes that a wired network is inconvenient to lay in remote areas, and can effectively realize the access of MS through the RAU and the RRU, so that the embodiment of the invention combines a flat network architecture of an LTE communication system, introduces a digital microwave transmission technology into LTE, and forms a novel LTE wireless coverage system; the embodiment of the invention also provides a signaling gateway, a security gateway and the RAU which are communicated with the LTE core network through the public network, so that the problem that a wireless network system cannot be communicated with the LTE core network under the condition that the optical fiber private network fails or is disconnected in the prior art can be solved, and therefore, the wireless network system provided by the embodiment of the invention can realize data transmission based on public network communication and can expand the application scene of the LTE wireless coverage system.

In the effective scheme of the embodiment of the present invention, the security gateway is connected to the third IDU and the third ODU, and the RAU is connected to the fourth ODU, so that the security gateway and the RAU can communicate with each other in a microwave communication manner.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

FIG. 1 is a block diagram of a prior art RNS;

fig. 2 is a block diagram of a wireless network system according to an embodiment of the present invention;

FIG. 3a is a block diagram of the RAU of FIG. 2;

fig. 3b is a block diagram of the RRU in fig. 2;

FIG. 4 is a block diagram of a first IDU of the RAU of FIG. 3 a;

fig. 5 is a block diagram of a first ODU of fig. 2;

fig. 6 is a block diagram of a second ODU of fig. 2;

fig. 7 is a block diagram of a second IDU of the RRU in fig. 3 b;

fig. 8 is another block diagram of a wireless network system according to an embodiment of the present invention;

FIG. 9 is a block diagram of the structure of the RAU of FIG. 8;

FIG. 10 is a block diagram of the third IDU of FIG. 8;

fig. 11 is a block diagram of a third ODU of fig. 8;

fig. 12 is a block diagram of a fourth ODU of fig. 8;

fig. 13 is a block diagram of a fourth IDU of the RAU of fig. 9.

Detailed Description

The embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that the embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

The embodiment of the invention provides a wireless network system, which is used for solving the problems that in the prior art, a BBU (baseband unit) and a RRU (remote radio unit) of the wireless network system can only be transmitted through a wired network, are not suitable for application scenes that a wired network is inconvenient to lay in remote areas, and the wireless network system is limited to be communicated with a core network only through a fiber private network.

Example one

In the technical solution provided by the embodiment of the present invention, a wireless access network for mobile communication includes a plurality of wireless network systems, and fig. 2 shows a block diagram of a structure of a wireless network system provided by the embodiment of the present invention, where the system includes:

a signaling gateway 23 and a security gateway 26 connected to a long term evolution LTE system core network 21 through a public network 22, where the signaling gateway 23 is connected to at least one RAU24 through the security gateway 26, each RAU is further connected to the LTE core network 21 through the security gateway 26, the RAU24 is connected to a first ODU3, the RRU25 is connected to a second ODU4, and microwave communication is performed between the RAU24 and the RRU25 through the first ODU3 and the second ODU 4;

specifically, the signaling gateway 23 is connected with the LTE core network 21 through an S1-MME interface, the security gateway 26 is connected with the signaling gateway 23 through an S1-MME interface, the security gateway 26 is connected with the LTE core network 21 through an S1-U interface, the RAU24 communicates with the signaling gateway 23 through an S1-MME interface, and the RAU24 is connected with the security gateway 26 through an S1-U interface; wherein,

the signaling gateway 23 is configured to aggregate and forward signaling in the MS communication process between the LTE core network 21 and the RAU 24;

the security gateway 26 is used for performing security detection on signaling communicated by the signaling gateway 23 and the RAU24 and data communicated by the LTE core network 21 and the RAU 24; preferably, the security gateway 26 may have an IPSEC protocol commonly used in the industry, and support establishment and management of an IPSEC channel, so as to provide secure and reliable communication transmission and access authentication between the RAU24 and the signaling gateway 23, and ensure information security of the wireless network system shown in fig. 2;

the RAU24 is configured to convert signaling in the communication process of the MS, which is from the signaling gateway 23 and is detected by the security gateway 26, and data in the communication process of the MS, which is from the LTE core network 21 and is detected by the security gateway 26, into baseband signals, convert the converted baseband signals into analog signals, and send the analog signals to the first ODU 3; receiving an analog signal from the first ODU3, converting the analog signal into a baseband signal, converting the converted baseband signal into signaling and data, sending the converted signaling to the signaling gateway 23, and sending the converted data to the LTE core network 21; specifically, the processing of the RAU24 for converting between baseband signals and signaling and data specifically includes aggregation and forwarding of baseband data, physical layer processing, and Media Access Controller (MAC) processing; further, the RAU24 also performs radio resource management, scheduling management, radio access control and mobility management for MS communication, performs RAU local and remote operation maintenance functions, and functions of monitoring working status and reporting alarm information;

the first ODU3 is configured to convert an analog signal from the RAU24 into a radio frequency signal, and send the radio frequency signal to the second ODU 4; receiving a radio frequency signal from the second ODU4, converting the received radio frequency signal into an analog signal, and sending the analog signal to the RAU 24;

the second ODU4 is configured to receive the radio frequency signal from the first ODU3, convert the radio frequency signal into an analog signal, and send the analog signal to the RRU 25; receiving an analog signal from the RRU25, converting the analog signal into a radio frequency signal, and sending the radio frequency signal to the first ODU 3;

the RRU25 is configured to convert the analog signal from the second ODU4 into a baseband signal, convert the baseband signal into a radio frequency signal, and send the radio frequency signal to the MS; the method includes receiving a radio frequency signal from the MS, converting the received radio frequency signal into a baseband signal, converting the baseband signal into an analog signal, and sending the analog signal obtained by conversion to the second ODU 4.

Specifically, as shown in fig. 3a, RAU24 includes: a digital signal processing module 241, a transmission protocol processing module 242, and a first IDU 243;

a digital signal processing module 241, configured to convert signaling in a communication process of the MS, which comes from the signaling gateway 23 and is detected securely by the security gateway 26, and data in a communication process of the MS, which comes from the LTE core network 21 and is detected securely by the security gateway 26, into baseband signals; converting the baseband signal from the transport protocol processing module 242 into signaling and data, and sending the signaling and data obtained by the conversion to the secure gateway 26;

a transmission protocol processing module 242, configured to perform framing of an IR/CPRI/OBSAI interface protocol on the baseband signal from the digital signal processing module 241 and send the baseband signal to a first IDU 243; deframing a Base Station IR Interface (IR, Interface between the BBU and the RRU)/Common Public Radio Interface (CPRI), Open Base Station Architecture protocol (OBSAI) Interface protocol for baseband signals from the first IDU 243;

a first IDU243, configured to convert the baseband signal from the transmission protocol processing module 242 into an analog signal, and send the analog signal obtained by conversion to the first ODU 3; the analog signal from the first ODU3 is converted into a baseband signal, and the converted baseband signal is sent to the transmission protocol processing module.

Specifically, as shown in fig. 3b, RRU25 includes: a second IDU251, a transmission protocol processing module 252, a digital intermediate frequency processing module 253, and a radio frequency transceiver module 254;

a second IDU251, configured to convert the analog signal from the second ODU4 into a baseband signal, and send the converted baseband signal to the transport protocol processing module 252; converting the baseband signal from the transmission protocol processing module 252 into an analog signal, and sending the analog signal obtained by the conversion to the second ODU 4;

the transmission protocol processing module 252 is configured to perform the deframing of the IR/CPRI/OBSAI interface protocol on the baseband signal from the second IDU251, and send the deframed baseband signal to the digital intermediate frequency processing module 253; framing the baseband signal from the digital intermediate frequency processing module 253 by an IR/CPRI/OBSAI interface protocol, and then sending the baseband signal to the second IDU 251;

a digital intermediate frequency processing module 253, connected to the transmission protocol processing module 252, for converting the baseband signal from the transmission protocol processing module 252 into a digital intermediate frequency signal, and sending the digital intermediate frequency signal to the radio frequency transceiver module 254; convert the digital if signal from the rf transceiver module 254 into a baseband signal, and send the baseband signal to the transport protocol processing module 252;

a rf transceiver module 254 connected to the digital if processing module 253, for converting the digital if signal from the digital if processing module 253 into a rf signal and transmitting the rf signal to the mobile station MS; the MS receives a radio frequency signal from the MS, converts the received radio frequency signal into a digital intermediate frequency signal, and sends the digital intermediate frequency signal to the digital intermediate frequency processing module 253.

As shown in fig. 4, the first IDU243 of the RAU24 includes:

a signaling source coding module 24301, configured to perform source coding on the baseband signal from the transmission protocol processing module 242 of the RAU 24;

a signaling baseband signal processing module 24302, connected to the signaling source coding module 24301, and configured to perform scrambling, interleaving, and microwave frame framing processing on the signal from the signaling source coding module 24301;

a signaling modulation module 24303, connected to the signaling baseband signal processing module 24302, for modulating the signal from the signaling baseband signal processing module 24302;

a digital up-conversion module 24304, connected to the signaling modulation module 24303, for performing interpolation filtering and frequency mixing processing on the signal from the signaling modulation module 24303 to obtain a low-intermediate frequency digital signal;

a digital-to-analog conversion module 24305, connected to the digital up-conversion module 24304, for performing digital-to-analog conversion on the low-intermediate frequency digital signal from the digital up-conversion module 24304 to obtain a low-intermediate frequency analog signal;

the analog up-conversion module 24306 is connected to the digital-to-analog conversion module 24305, and is configured to perform analog up-conversion on the low-intermediate-frequency analog signal from the digital-to-analog conversion module 24305 to obtain a high-intermediate-frequency analog signal, and send the high-intermediate-frequency analog signal to the first ODU 3;

an analog down-conversion module 24307, configured to perform analog down-conversion on the high-intermediate-frequency analog signal from the first ODU3 to obtain a low-intermediate-frequency analog signal;

the analog-to-digital conversion module 24308 is connected to the analog down-conversion module 24307, and is configured to perform analog-to-digital conversion on the low-intermediate-frequency analog signal from the analog down-conversion module 24307 to obtain a low-intermediate-frequency digital signal;

a digital down-conversion module 24309, connected to the analog-to-digital conversion module 24308, configured to perform frequency mixing, decimation filtering, and shaping filtering on the low-intermediate frequency digital signal from the analog-to-digital conversion module 24308 to obtain a zero-intermediate frequency baseband signal;

a receiving demodulation module 24310, connected to the digital down-conversion module 24309, for demodulating the zero intermediate frequency baseband signal from the digital down-conversion module 24309;

a receiving baseband signal processing module 24311, connected to the receiving demodulation module 24310, for performing descrambling, deinterleaving and microwave frame deframing on the signal from the receiving demodulation module 24310;

a receiving signal source decoding module 24312, connected to the receiving baseband signal processing module 24311, and configured to perform signal source decoding on the signal from the receiving baseband signal processing module 24311 to obtain a baseband signal, and send the obtained baseband signal to the transmission protocol processing module 242 of the RAU 24.

As shown in fig. 5, the first ODU3 includes:

a signaling intermediate frequency amplification module 301, configured to perform band-pass filtering and low-noise amplification on the analog signal of the intermediate frequency from the first IDU243 of the RAU;

a transmitting and mixing module 302, connected to the transmitting intermediate-frequency amplifying module 301, for performing analog mixing on the analog signal from the transmitting intermediate-frequency amplifying module 301 to obtain a high-intermediate-frequency radio-frequency signal;

a transmitting band-pass filtering module 303, connected to the transmitting frequency mixing module 302, for performing band-pass filtering on the radio frequency signal from the transmitting frequency mixing module 302;

the power amplification module 304 is connected to the transmitting bandpass filtering module 303, and is configured to perform power amplification on the radio frequency signal from the transmitting bandpass filtering module 303;

a radio frequency attenuation module 305 connected to the power amplification module 304, configured to perform gain attenuation on the radio frequency signal from the power amplification module 304, and send the obtained radio frequency signal to the second ODU 4;

a receive bandpass filtering module 306, configured to perform bandpass filtering on the radio frequency signal from the second ODU 4;

a low noise amplification module 307, connected to the receiving bandpass filtering module 306, for performing low noise amplification on the radio frequency signal from the receiving bandpass filtering module 306;

a receiving and mixing module 308 connected to the low noise amplification module 307, for performing analog mixing on the radio frequency signal from the low noise amplification module 307 to obtain an analog signal;

a receiving filter module 309, connected to the receiving mixing module 308, for performing band-pass filtering on the analog signal from the receiving mixing module 308;

a receiving intermediate frequency amplifying module 310, connected to the receiving filtering module 309, configured to perform intermediate frequency amplification on the analog signal from the receiving filtering module 309 to obtain an intermediate frequency analog signal, and send the obtained intermediate frequency analog signal to the first IDU243 of the RAU 24.

As shown in fig. 6, the second ODU4 includes:

a signaling bandpass filtering module 401, configured to perform bandpass filtering on the radio frequency signal from the first ODU 3;

the low-noise amplification module 402 is connected to the transmitting band-pass filtering module 401, and is configured to perform low-noise amplification on the radio frequency signal from the transmitting band-pass filtering module 401;

a transmitting and mixing module 403, connected to the low-noise amplifying module 402, for performing analog mixing on the radio frequency signal from the low-noise amplifying module 402 to obtain an analog signal;

a transmitting filter module 404, connected to the transmitting mixer module 403, for performing band-pass filtering on the analog signal from the transmitting mixer module 403;

a transmitting intermediate frequency amplifying module 405, connected to the transmitting filtering module 404, configured to perform intermediate frequency amplification on the analog signal from the transmitting filtering module 404 to obtain an intermediate frequency analog signal, and send the obtained intermediate frequency analog signal to the second IDU251 of the RRU 25;

a receiving intermediate frequency amplifying module 406, configured to perform band-pass filtering and low-noise amplification on the intermediate frequency analog signal from the second IDU251 of the RRU;

a receiving and frequency mixing module 407, connected to the receiving and intermediate frequency amplifying module 406, for performing analog frequency mixing on the analog signal from the receiving and intermediate frequency amplifying module 406 to obtain a high-intermediate frequency radio frequency signal;

a receiving band-pass filtering module 408 connected to the receiving mixing module 407 and configured to perform band-pass filtering on the radio frequency signal from the receiving mixing module 407;

a power amplification module 409 connected to the reception bandpass filtering module 408 for performing power amplification on the radio frequency signal from the reception bandpass filtering module 408;

the radio frequency attenuation module 410 is connected to the power amplification module 409, and is configured to perform gain attenuation on the radio frequency signal from the power amplification module 409, and send the obtained radio frequency signal to the first ODU 3.

As shown in fig. 7, the second IDU251 of RRU25 includes:

an analog down-conversion module 25101, configured to perform analog down-conversion processing on the high-intermediate-frequency analog signal from the second ODU4 to obtain a low-intermediate-frequency analog signal;

an analog-to-digital conversion module 25102 connected to the analog down-conversion module 25101, and configured to perform analog-to-digital conversion on the low-intermediate frequency analog signal from the analog down-conversion module 25101 to obtain a low-intermediate frequency digital signal;

a digital down-conversion module 25103, connected to the analog-to-digital conversion module 25102, for performing frequency mixing, decimation filtering and shaping filtering on the low-intermediate frequency digital signal from the analog-to-digital conversion module 25102 to obtain a zero-intermediate frequency baseband signal;

a signaling demodulation module 25104, connected to the digital down-conversion module 25103, for demodulating the zero intermediate frequency baseband signal from the digital down-conversion module 25103;

a transmitting baseband signal processing module 25105, connected to the transmitting demodulation module 25104, for performing descrambling, deinterleaving and microwave frame deframing on the signal from the transmitting demodulation module 25104;

a signaling source decoding module 25106, connected to the signaling baseband signal processing module 25105, and configured to perform source decoding on the signal from the signaling baseband signal processing module 25105 to obtain a baseband signal, and send the obtained baseband signal to the transmission protocol processing module 252 of the RRU 25;

a receiving source coding module 25107, configured to perform source coding on the baseband signal from the transmission protocol processing module 252 of the RRU 25;

a receiving baseband signal processing module 25108 connected to the receiving source coding module 25107 for scrambling, interleaving and framing the microwave frames of the signal from the receiving source coding module 25107;

a receive modulation module 25109, connected to the receive baseband signal processing module 25108, for modulating the signal from the receive baseband signal processing module 25108;

a digital up-conversion module 25110, connected to the receiving modulation module 25109, for performing interpolation filtering and mixing processing on the signal from the receiving modulation module 25109 to obtain a low-intermediate frequency digital signal;

a digital-to-analog conversion module 25111, connected to the digital up-conversion module 25110, for performing digital-to-analog conversion on the low-intermediate frequency digital signal from the digital up-conversion module 25110 to obtain a low-intermediate frequency analog signal;

the analog up-conversion module 25112 is connected to the digital-to-analog conversion module 25111, and is configured to perform analog up-conversion on the low-intermediate-frequency analog signal from the digital-to-analog conversion module 25111 to obtain a high-intermediate-frequency analog signal, and send the high-intermediate-frequency analog signal to the second ODU 4.

In the system shown in fig. 2, the processing flow of the downlink signal from the LTE core network 21 to the MS includes:

the LTE core network 21 converges the signaling information to the signaling gateway 23, the signaling gateway 23 converges and forwards the signaling information to the security gateway 26, the LTE core network 21 issues the data information to the security gateway 26, and the security gateway 26 performs security detection on the signaling information and the data information and then sends the signaling information and the data information to the RAU 24;

the digital signal processing module 241 and the transmission protocol processing module 242 of the RAU24 perform upper layer protocol processing and baseband signal processing (including coding, modulation, spreading and scrambling, etc. of the physical layer) on the data information and the signaling information, and output a digital baseband signal;

a first IDU243 of the RAU24 performs source coding, signal transmission baseband signal processing (including scrambling, interleaving, microwave frame framing), adjustment (such as 16QAM adjustment), digital up-conversion processing (including interpolation filtering, frequency mixing and other processing) on the digital baseband signal from the transmission protocol processing module 242 of the RAU24 to form a digital signal of a low intermediate frequency, performs digital-to-analog conversion on the digital signal of the low intermediate frequency, outputs an analog signal of the low intermediate frequency, and finally outputs an analog signal of a high intermediate frequency through analog up-conversion processing, and sends the analog signal to the first ODU 3;

the first ODU3 performs intermediate frequency amplification and analog frequency mixing on the high and intermediate frequency analog signal from the first IDU243 of the RAU24 to obtain a high and intermediate frequency radio frequency signal, performs band-pass filtering on the high and intermediate frequency radio frequency signal, filters out-of-band interference signals, obtains a radio frequency signal with appropriate gain through power amplification and radio frequency attenuation processing, and sends the radio frequency signal to the second ODU4 in a microwave manner;

the second ODU4 performs bandpass filtering, low-noise amplification and analog mixing processing on the radio frequency signal from the first ODU3 to obtain an analog signal, performs bandpass filtering and intermediate-frequency amplification on the analog signal to obtain a high-intermediate-frequency analog signal, and sends the amplified high-intermediate-frequency analog signal to the second IDU251 of the RRU 25;

the second IDU251 of the RRU25 performs analog down-conversion processing on the high-intermediate-frequency analog signal from the second ODU4 to obtain a low-intermediate-frequency analog signal, performs analog-to-digital conversion on the low-intermediate-frequency analog signal to obtain a low-intermediate-frequency digital signal, performs frequency mixing, decimation filtering and shaping filtering on the low-intermediate-frequency digital signal to obtain a zero-intermediate-frequency baseband signal, performs demodulation, descrambling, deinterleaving, microwave frame deframing processing and source decoding on the zero-intermediate-frequency baseband signal to obtain a baseband signal, and sends the obtained baseband signal to the transmission protocol processing module 252 of the RRU 25;

the transmission protocol processing module 252 and the digital intermediate frequency processing module 253 of the RRU25 perform radio frequency conversion on the baseband signal from the IDU41 of the second microwave transmission apparatus to obtain a radio frequency signal, and send the radio frequency signal to the MS through the antenna of the RRU25, i.e., the radio frequency transceiver module 254.

The processing flow of the uplink signal from the MS to the LTE core network 21 includes:

the RRU25 receives a radio frequency signal from the MS through an antenna, i.e., the radio frequency transceiver module 254, the digital intermediate frequency processing module 253 and the transmission protocol processing module 252 of the RRU25 convert the radio frequency signal into a digital baseband signal through radio frequency conversion, and send the digital baseband signal to the second IDU251 of the RRU 25;

the RRU25 second IDU251 performs source coding, scrambling, interleaving, microwave frame framing, modulation, interpolation filtering, and frequency mixing on the received baseband signal to obtain a low-intermediate frequency digital signal, performs digital-to-analog conversion on the low-intermediate frequency digital signal to obtain a low-intermediate frequency analog signal, performs analog up-conversion on the low-intermediate frequency analog signal to obtain a high-intermediate frequency analog signal, and sends the high-intermediate frequency analog signal to the second ODU 4;

the second ODU4 performs bandpass filtering, low-noise amplification and analog frequency mixing on the intermediate-frequency analog signal from the second IDU251 of the RRU25 to obtain a high-intermediate-frequency radio frequency signal, performs bandpass filtering, power amplification and gain attenuation on the radio frequency signal, and sends the radio frequency signal with appropriate gain to the first ODU 3;

the first ODU3 performs bandpass filtering, low-noise amplification and analog mixing on the radio frequency signal from the second ODU4 to obtain an analog signal, performs bandpass filtering and intermediate-frequency amplification on the analog signal to obtain an intermediate-frequency analog signal, and sends the obtained intermediate-frequency analog signal to the first IDU243 of the RAU 24;

the first IDU243 of the RAU24 performs analog down-conversion on the high-intermediate-frequency analog signal from the first ODU3 to obtain a low-intermediate-frequency analog signal, performs analog-to-digital conversion on the low-intermediate-frequency analog signal to obtain a low-intermediate-frequency digital signal, performs frequency mixing, decimation filtering and shaping filtering on the low-intermediate-frequency digital signal to obtain a zero-intermediate-frequency baseband signal, performs demodulation, descrambling, deinterleaving, microwave frame deframing processing and source decoding on the zero-intermediate-frequency baseband signal to obtain a baseband signal, and sends the obtained baseband signal to the transmission protocol processing module 242 of the RAU 24;

the transmission protocol processing module 242 and the digital signal processing module 241 of the RAU24 convert the digital baseband signal from the first IDU243 into data information and signaling information, and send the converted data information and signaling information to the security gateway 26, after the security gateway 26 performs security detection on the data information and the signaling information, the data information is sent to the LTE core network 21, the signaling information is sent to the signaling gateway 23, and the signaling gateway 23 aggregates and forwards the signaling information and sends the signaling information to the LTE core network 21.

Through the system shown in fig. 2, the first microwave transmission device and the second microwave transmission device are arranged to realize wireless communication between the RAU and the RRU, so that the system can be applied to application scenes in which a wired network is not conveniently laid in remote areas, and access to the MS through the RAU and the RRU can be effectively realized, and thus, the embodiment of the invention combines a flat network architecture of an LTE communication system, and introduces a digital microwave transmission technology into LTE to form a novel LTE wireless coverage system; the embodiment of the invention also provides a signaling gateway, a signaling gateway and the RAU which are communicated with the LTE core network through the public network, so that the problem that a wireless network system cannot communicate with the LTE core network under the condition that the optical fiber private network fails or the optical fiber private network is disconnected in the prior art can be avoided, and therefore, the wireless network system provided by the embodiment of the invention can realize communication data transmission based on the public network and can expand the application scene of the LTE wireless coverage system.

Example two

As shown in fig. 8, on the basis of the wireless network system shown in fig. 2, in the wireless network system provided in the embodiment of the present invention, the wireless network system further includes: a third IDU5, a third ODU6, and a fourth ODU7, where the security gateway 26 is connected to the third IDU5, the security gateway 26 may be specifically connected to the third IDU5 through a network such as a PTN or a PON, and the third IDU5 is connected to the third ODU6, as shown in fig. 9, the RAU24 further includes a fourth IDU244, the fourth IDU244 is connected to the fourth ODU7, and microwave communication is performed between the security gateway 26 and the RAU24 through the third IDU5, the third ODU6, and the fourth ODU 7.

A third IDU5, which converts the signaling or data detected by the security gateway 26 into an analog signal, and sends the analog signal obtained by conversion to a third ODU 6; converting the analog signal from the third ODU6 into signaling or data, and sending the converted signal or data to the security gateway 26;

the third ODU6 converts the analog signal from the third IDU5 into a radio frequency signal, and sends the radio frequency signal to the fourth ODU7 by way of microwave communication; converting the radio frequency signal from the fourth ODU7 into an analog signal, and sending the analog signal obtained by the conversion to the third IDU 5;

a fourth ODU7, which converts the radio frequency signal from the third ODU6 into an analog signal and sends the analog signal obtained by conversion to the fourth IDU244 of the RAU 24; converting the analog signal from the RAU24 and the fourth IDU244 into a radio frequency signal, and sending the converted radio frequency signal to the third ODU6 in a microwave communication manner;

the RAU24, the fourth IDU244, which converts the analog signal from the fourth ODU7 into signaling or data, and sends the signaling or data obtained by conversion to the digital signal processing module 241 of the RAU 24; the signaling or data from the digital signal processing module 241 of the RAU24 is converted into an analog signal, and the converted analog signal is sent to the fourth ODU 7.

As shown in fig. 10, the third IDU5 includes:

a signaling source coding module 501, configured to perform source coding on the data and the signaling from the security gateway 26 after security detection;

a transmitting baseband signal processing module 502, connected to the transmitting source coding module 501, for performing scrambling, interleaving, and microwave frame framing processing on the signal from the transmitting source coding module 501;

a signaling modulation module 503, connected to the signaling baseband signal processing module 502, for modulating the signal from the signaling baseband signal processing module 502;

a digital up-conversion module 504, connected to the signaling modulation module 503, for performing interpolation filtering and frequency mixing processing on the signal from the signaling modulation module 503 to obtain a low-intermediate frequency digital signal;

a digital-to-analog conversion module 505 connected to the digital up-conversion module 504, configured to perform digital-to-analog conversion on the low-intermediate frequency digital signal from the digital up-conversion module 504 to obtain a low-intermediate frequency analog signal;

an analog up-conversion module 506, connected to the digital-to-analog conversion module 505, and configured to perform analog up-conversion on the low-intermediate-frequency analog signal from the digital-to-analog conversion module 505 to obtain a high-intermediate-frequency analog signal, and send the high-intermediate-frequency analog signal to the third ODU 6;

an analog down-conversion module 507, configured to perform analog down-conversion on the high-intermediate-frequency analog signal from the third ODU6 to obtain a low-intermediate-frequency analog signal;

the analog-to-digital conversion module 508 is connected to the analog down-conversion module 507, and is configured to perform analog-to-digital conversion on the low-intermediate-frequency analog signal from the analog down-conversion module 507 to obtain a low-intermediate-frequency digital signal;

a digital down-conversion module 509 connected to the analog-to-digital conversion module 508 and configured to perform frequency mixing, decimation filtering and shaping filtering on the low-intermediate frequency digital signal from the analog-to-digital conversion module 508 to obtain a zero-intermediate frequency baseband signal;

a receiving demodulation module 510, connected to the digital down-conversion module 509, for demodulating the zero intermediate frequency baseband signal from the digital down-conversion module 509;

a receiving baseband signal processing module 511, connected to the receiving demodulation module 510, for performing descrambling, deinterleaving and microwave frame deframing on the signal from the receiving demodulation module 510;

a receiving signal source decoding module 512, connected to the receiving baseband signal processing module 511, for performing signal source decoding on the signal from the receiving baseband signal processing module 511 to obtain signaling and data, and sending the obtained signaling and data to the signaling gateway 26;

as shown in fig. 11, the third ODU6 includes:

a transmitting intermediate frequency amplifying module 601, configured to perform bandpass filtering and low noise amplification on the analog signal of the intermediate frequency from the third IDU 5;

a transmitting and mixing module 602, connected to the transmitting intermediate-frequency amplifying module 601, for performing analog mixing on the analog signal from the transmitting intermediate-frequency amplifying module 601 to obtain a high-intermediate-frequency radio-frequency signal;

a transmitting band-pass filtering module 603, connected to the transmitting frequency mixing module 602, for performing band-pass filtering on the radio frequency signal from the transmitting frequency mixing module 602;

a power amplifying module 604, connected to the transmitting bandpass filtering module 603, for performing power amplification on the radio frequency signal from the transmitting bandpass filtering module 603;

a radio frequency attenuation module 605, connected to the power amplification module 604, configured to perform gain attenuation on the radio frequency signal from the power amplification module 604, and send the obtained radio frequency signal to the fourth ODU 7;

a receive bandpass filtering module 606, configured to perform bandpass filtering on the radio frequency signal from the fourth ODU 7;

the low-noise amplification module 607 is connected to the reception bandpass filtering module 606 and is used for performing low-noise amplification on the radio-frequency signal from the reception bandpass filtering module 606;

a receiving and mixing module 608 connected to the low noise amplification module 607, for performing analog mixing on the radio frequency signal from the low noise amplification module 607 to obtain an analog signal;

a receiving filtering module 609 connected to the receiving mixing module 608 for performing band-pass filtering on the analog signal from the receiving mixing module 608;

and a receiving intermediate frequency amplifying module 610, connected to the receiving filtering module 609, configured to perform intermediate frequency amplification on the analog signal from the receiving filtering module 609 to obtain an intermediate frequency analog signal, and send the obtained intermediate frequency analog signal to the third IDU 5.

As shown in fig. 12, the fourth ODU7 includes:

a signaling bandpass filtering module 701, configured to perform bandpass filtering on the radio frequency signal from the third ODU 6;

the low-noise amplification module 702 is connected to the transmission band-pass filtering module 701, and is configured to perform low-noise amplification on the radio frequency signal from the transmission band-pass filtering module 701;

a transmitting and mixing module 703, connected to the low-noise amplifying module 702, for performing analog mixing on the radio frequency signal from the low-noise amplifying module 702 to obtain an analog signal;

a transmitting filter module 704, connected to the transmitting mixer module 703, for performing band-pass filtering on the analog signal from the transmitting mixer module 703;

a transmitting intermediate frequency amplifying module 705, connected to the transmitting filtering module 704, for performing intermediate frequency amplification on the analog signal from the transmitting filtering module 704 to obtain an intermediate frequency analog signal, and sending the obtained intermediate frequency analog signal to the fourth IDU244 of the RAU 24;

a receiving intermediate frequency amplifying module 706, configured to perform band-pass filtering and low-noise amplification on the intermediate frequency analog signal from the fourth IDU244 of the RAU 24;

a receiving and frequency mixing module 707, connected to the receiving and intermediate frequency amplifying module 706, for performing analog frequency mixing on the analog signal from the receiving and intermediate frequency amplifying module 706 to obtain a high-intermediate frequency radio frequency signal;

a receiving band-pass filtering module 708 connected to the receiving frequency mixing module 707 and configured to perform band-pass filtering on the radio frequency signal from the receiving frequency mixing module 707;

a power amplifying module 709 connected to the receiving band-pass filtering module 708 for performing power amplification on the radio frequency signal from the receiving band-pass filtering module 708;

a radio frequency attenuation module 710, connected to the power amplification module 709, configured to perform gain attenuation on the radio frequency signal from the power amplification module 709, and send the obtained radio frequency signal to the third ODU 6;

as shown in fig. 13, the fourth IDU244 of RAU24 includes:

an analog down-conversion module 24401, configured to perform analog down-conversion processing on the high-intermediate-frequency analog signal from the fourth ODU7 to obtain a low-intermediate-frequency analog signal;

the analog-to-digital conversion module 24402 is connected to the analog down-conversion module 24401, and is configured to perform analog-to-digital conversion on the low-intermediate-frequency analog signal from the analog down-conversion module 24401 to obtain a low-intermediate-frequency digital signal;

a digital down-conversion module 24403, connected to the analog-to-digital conversion module 24402, configured to perform frequency mixing, decimation filtering, and shaping filtering on the low-intermediate frequency digital signal from the digital-to-analog conversion module 24402 to obtain a zero-intermediate frequency baseband signal;

a signal demodulation module 24404, connected to the digital down-conversion module 24403, for demodulating the zero intermediate frequency baseband signal from the digital down-conversion module 24403;

a transmitting baseband signal processing module 24405, connected to the transmitting demodulation module 24404, for performing descrambling, deinterleaving, and microwave frame deframing on the signal from the transmitting demodulation module 24404;

a signaling source decoding module 24406, connected to the signaling baseband signal processing module 24405, configured to perform source decoding on the signal from the signaling baseband signal processing module 24405 to obtain a baseband signal, and send the obtained baseband signal to the digital signal processing module 241 of the RAU 24;

a receiving source coding module 24407, configured to perform source coding on the baseband signal from the word signal processing module 241 of the RAU 24;

a receiving baseband signal processing module 24408 connected to the receiving source coding module 24407 and configured to scramble, interleave, and frame the microwave frames of the signal from the receiving source coding module 24407;

a receiving modulation module 24409 connected to the receiving baseband signal processing module 24408, for modulating the signal from the receiving baseband signal processing module 24408;

a digital up-conversion module 24410, connected to the receiving modulation module 24409, for performing interpolation filtering and frequency mixing processing on the signal from the receiving modulation module 24409 to obtain a low-intermediate frequency digital signal;

a digital-to-analog conversion module 24411 connected to the digital up-conversion module 24410, configured to perform digital-to-analog conversion on the low-intermediate frequency digital signal from the digital up-conversion module 24410 to obtain a low-intermediate frequency analog signal;

the analog up-conversion module 24412 is connected to the digital-to-analog conversion module 24411, and is configured to perform analog up-conversion on the low-intermediate-frequency analog signal from the digital-to-analog conversion module 24411 to obtain a high-intermediate-frequency analog signal, and send the high-intermediate-frequency analog signal to the fourth ODU 7.

In the system shown in fig. 8, the processing flow of the downlink signal from the LTE core network 21 to the MS includes:

the LTE core network 21 converges the signaling information to the signaling gateway 23, the signaling gateway 23 converges and forwards the signaling information to the security gateway 26, the LTE core network 21 issues the data information to the security gateway 26, and the security gateway 26 sends the signaling information and the data information to the third IDU5 after performing security detection on the signaling information and the data information;

the third IDU5 performs source coding, signaling baseband signal processing (including scrambling, interleaving, microwave framing), adjusting (such as 16QAM adjusting), and digital up-conversion processing (including interpolation filtering, frequency mixing, and the like) on the signaling information and data information from the security gateway 26 to form a digital signal of low and intermediate frequency, performs digital-to-analog conversion on the digital signal of low and intermediate frequency, outputs an analog signal of low and intermediate frequency, and finally outputs an analog signal of high and intermediate frequency through analog up-conversion processing, and sends the analog signal to the third ODU 6;

the third ODU6 performs intermediate frequency amplification and analog frequency mixing on the high and intermediate frequency analog signal from the third IDU5 to obtain a high and intermediate frequency radio frequency signal, performs band-pass filtering on the high and intermediate frequency radio frequency signal to filter out-of-band interference signals, performs power amplification and radio frequency attenuation processing to obtain a radio frequency signal with appropriate gain, and sends the radio frequency signal to the fourth ODU7 in a microwave manner;

the radio frequency signal of the fourth ODU7 is subjected to bandpass filtering, low-noise amplification and analog mixing to obtain an analog signal, the analog signal is subjected to bandpass filtering and intermediate-frequency amplification to obtain a high-intermediate-frequency analog signal, and the amplified high-intermediate-frequency analog signal is sent to the fourth IDU244 of the RAU 24;

the fourth IDU244 of the RAU24 performs analog down-conversion processing on the high-intermediate-frequency analog signal from the fourth ODU7 to obtain a low-intermediate-frequency analog signal, performs analog-to-digital conversion on the low-intermediate-frequency analog signal to obtain a low-intermediate-frequency digital signal, performs frequency mixing, decimation filtering and shaping filtering on the low-intermediate-frequency digital signal to obtain a zero-intermediate-frequency baseband signal, performs demodulation, descrambling, deinterleaving, microwave frame deframing processing and source decoding on the zero-intermediate-frequency baseband signal to obtain signaling information and data signaling, and sends the obtained signaling information and data signaling to the digital signal processing module 241 of the RAU 24;

processing procedure of downlink signal between RAU24 and MS referring to processing procedure of downlink signal between RAU24 and MS in the first embodiment.

processing procedure of uplink signal between MS and RAU24 referring to processing procedure of uplink signal between MS and RAU24 in the first embodiment;

the transport protocol processing module 242 and the digital signal processing module 241 of the RAU24 convert the digital baseband signal from the first ODU243 into data information and signaling information, and send the data information and the signaling information to the fourth IDU 244;

the fourth IDU244 performs source coding, scrambling, interleaving, microwave frame framing, modulation, interpolation filtering, and frequency mixing on the received data information and signaling information to obtain a digital signal of low and intermediate frequency, performs digital-to-analog conversion on the digital signal of low and intermediate frequency to obtain an analog signal of low and intermediate frequency, performs analog up-conversion on the analog signal of low and intermediate frequency to obtain an analog signal of high and intermediate frequency, and sends the analog signal of high and intermediate frequency to the fourth ODU 7;

the fourth ODU7 performs bandpass filtering, low-noise amplification and analog mixing on the intermediate-frequency analog signal from the fourth IDU244 of the RAU24 to obtain a high-intermediate-frequency radio frequency signal, performs bandpass filtering, power amplification and gain attenuation on the radio frequency signal, and sends the radio frequency signal with appropriate gain to the third ODU 6;

the third ODU6 performs bandpass filtering, low-noise amplification and analog mixing on the radio frequency signal from the fourth IDU244 of the RAU24 to obtain an analog signal, performs bandpass filtering and intermediate-frequency amplification on the analog signal to obtain an intermediate-frequency analog signal, and sends the obtained intermediate-frequency analog signal to the third IDU 5;

the third IDU5 performs analog down-conversion on the high-intermediate-frequency analog signal from the third ODU6 to obtain a low-intermediate-frequency analog signal, performs analog-to-digital conversion on the low-intermediate-frequency analog signal to obtain a low-intermediate-frequency digital signal, performs frequency mixing, decimation filtering and shaping filtering on the low-intermediate-frequency digital signal to obtain a zero-intermediate-frequency baseband signal, and performs demodulation, descrambling, deinterleaving, microwave frame deframing processing and source decoding on the zero-intermediate-frequency baseband signal to obtain signaling information and data information;

the security gateway 26 performs security detection on the signaling information and the data information from the third IDU5, sends the data information passing the security detection to the LTE core network 21, and sends the signaling information passing the security detection to the signaling gateway 23;

the signaling gateway 23 aggregates and forwards the signaling information and then sends the aggregated and forwarded signaling information to the LTE core network 21.

Through the system shown in fig. 8, the security gateway 26 and the RAU24 can communicate with each other by way of microwave communication, so that the wireless network system provided by the embodiment of the present invention can be applied to an application scenario in which the security gateway 26 and the RAU24 cannot communicate with each other due to the fact that wired network connection cannot be performed, and the application scenario of the LTE wireless coverage system is further expanded.

EXAMPLE III

Wireless network system provided in the third embodiment is based on the wireless network system provided in the second embodiment, and the security gateway 26 and the third IDU5 are connected by a wired network. In this way, in a case where the link between the security gateway 26 and the RAU24 cannot be directly through the wired network, microwave communication is performed by providing the third IDU5, the third ODU6, and the fourth ODU7 and providing the fourth IDU244 in the RAU 24.

In the third embodiment, when the security gateway 26 and the RAU24 communicate with each other through the wired network and the microwave method, the processing flow of the downlink signal from the LTE core network 21 to the MS includes:

the core network 21 converges the signaling information to the signaling gateway 23, the signaling gateway 23 converges and forwards the signaling information to the security gateway 26, the core network 21 issues the data information to the security gateway 26, and the security gateway 26 performs security detection on the signaling information and the data information and then sends the signaling information and the data information as a third IDU5 through a wired network; the processing procedure of the downlink signals between the third IDU5 to the RAU24 and the RAU24 to the MS refers to the processing procedure of the downlink signals between the third IDU5 to the RAU24 and the RAU24 to the MS in the second embodiment.

When the security gateway 26 and the RAU24 communicate with each other through the wired network and the microwave method, the processing flow of the uplink signal from the MS to the LTE core network 21 includes:

processing of uplink signals between the MS and the RAU24 and the RAU24 to the third IDU5 refer to the processing of uplink signals between the MS and the RAU24 and the RAU24 to the third IDU5 in the second embodiment; the third IDU5 data and signaling are sent to the security gateway 26 through the wired network, after the security gateway 26 performs security detection on the data information and the signaling information, the data information is sent to the core network 21, the signaling information is sent to the signaling gateway 23, and the signaling gateway 23 aggregates and forwards the signaling information and then sends the signaling information to the LTE core network 21.

Through the wireless network system provided by the third embodiment, the communication between the security gateway 26 and the RAU24 can be effectively ensured, and the application scenario of the wireless network system provided by the embodiment of the present invention can be further expanded.

Example four

On the basis of the first embodiment, the second embodiment, or the third embodiment, the wireless network system provided in the embodiment of the present invention further includes: and the network management unit (not shown in the figure) is connected with the signaling gateway 23, the security gateway 26, the RAU24 and the RRU25, so as to realize the functions of user interface management, user group management, software management, log management, system maintenance, parameter setting and alarm reporting of the signaling gateway 23, the security gateway 26, the RAU24 and the RRU 25.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A wireless network system, comprising: the system comprises a signaling gateway and a security gateway which are connected with a Long Term Evolution (LTE) core network through a public network, wherein the signaling gateway is connected with at least one Radio Access Unit (RAU) through the security gateway, each RAU is also connected to the LTE core network through the security gateway, the RAU is connected with a first microwave outdoor transmission device (ODU), a remote end covering unit (RRU) is connected with a second ODU, and the RAU and the RRU are in microwave communication through the first ODU and the second ODU; wherein,

the signaling gateway is used for converging and forwarding the signaling in the communication process of the mobile station MS between the LTE core network and the RAU;

the RRU is used for converting the analog signal from the second ODU into a baseband signal, converting the baseband signal into a radio frequency signal and sending the radio frequency signal to the MS; receiving a radio frequency signal from the MS, converting the received radio frequency signal into a baseband signal, converting the baseband signal into an analog signal, and sending the analog signal obtained by the conversion to the second ODU;

the RAU includes: the system comprises a digital signal processing module, a transmission protocol processing module and a first microwave indoor unit IDU;

the digital signal processing module is used for converting signaling in the communication process of the MS which comes from the signaling gateway and is detected through the security gateway and data in the communication process of the MS which comes from the LTE core network and is detected through the security gateway into baseband signals; converting the baseband signal from the transmission protocol processing module into signaling and data, and sending the signaling and data obtained by conversion to the security gateway;

the transmission protocol processing module is used for framing the IR/CPRI/OBSAI interface protocol of the baseband signal from the digital signal processing module and then sending the baseband signal to the first IDU; deframing the baseband signal from the first IDU by an IR/CPRI/OBSAI interface protocol;

the first IDU is used for converting a baseband signal from the transmission protocol processing module into an analog signal and sending the analog signal obtained by conversion to the first ODU; the analog signal from the first ODU is converted into a baseband signal, and the converted baseband signal is sent to the transmission protocol processing module.

2. The system of claim 1, wherein the RRU comprises: the second IDU, the transmission protocol processing module, the digital intermediate frequency processing module and the radio frequency transceiving module;

the second IDU is configured to convert the analog signal from the second ODU into a baseband signal, and send the converted baseband signal to the transport protocol processing module; converting the baseband signal from the transmission protocol processing module into an analog signal, and sending the analog signal obtained by conversion to a second ODU;

the transmission protocol processing module is used for performing the unfreezing of the IR/CPRI/OBSAI interface protocol on the baseband signal from the second IDU and sending the unfreezed baseband signal to the digital intermediate frequency processing module; framing the baseband signal from the digital intermediate frequency processing module by an IR/CPRI/OBSAI interface protocol and then sending the baseband signal to a second IDU;

the digital intermediate frequency processing module is used for converting the baseband signal from the transmission protocol processing module into a digital intermediate frequency signal and sending the digital intermediate frequency signal to the radio frequency transceiving module; converting the digital intermediate frequency signal from the radio frequency transceiving module into a baseband signal, and sending the baseband signal to the transmission protocol processing module;

the radio frequency receiving and transmitting module is used for converting the digital intermediate frequency signals from the digital intermediate frequency processing module into radio frequency signals and transmitting the radio frequency signals to the MS; and receiving a radio frequency signal from the MS, converting the received radio frequency signal into a digital intermediate frequency signal, and sending the digital intermediate frequency signal to the digital intermediate frequency processing module.

3. The system of claim 1, wherein the first IDU of the RAU comprises:

the transmitting source coding module is used for carrying out source coding on the baseband signal from the RAU transmission protocol processing module;

the transmitting baseband signal processing module is used for scrambling, interweaving and microwave frame framing processing of the signal from the transmitting information source coding module;

the transmitting modulation module is used for modulating the signal from the transmitting baseband signal processing module;

the digital up-conversion module is used for carrying out interpolation filtering and frequency mixing processing on the signals from the transmitting modulation module to obtain low-intermediate frequency digital signals;

the digital-to-analog conversion module is used for performing digital-to-analog conversion on the low-intermediate frequency digital signal from the digital up-conversion module to obtain a low-intermediate frequency analog signal;

the analog up-conversion module is used for performing analog up-conversion processing on the low-intermediate frequency analog signal from the digital-to-analog conversion module to obtain a high-intermediate frequency analog signal, and sending the high-intermediate frequency analog signal to the first ODU;

the analog down-conversion module is used for performing analog down-conversion on the high-intermediate-frequency analog signal from the first ODU to obtain a low-intermediate-frequency analog signal;

the analog-to-digital conversion module is used for performing analog-to-digital conversion on the low-intermediate frequency analog signal from the analog down-conversion module to obtain a low-intermediate frequency digital signal;

the digital down-conversion module is used for carrying out frequency mixing, decimation filtering and shaping filtering on the low-intermediate frequency digital signals from the analog-to-digital conversion module to obtain zero-intermediate frequency baseband signals;

the receiving demodulation module is used for demodulating the zero intermediate frequency baseband signal from the digital down-conversion module;

the receiving baseband signal processing module is used for carrying out interference removal, de-interleaving and microwave frame de-framing processing on the signals from the receiving demodulation module;

and the receiving information source decoding module is used for carrying out information source decoding on the signal from the receiving baseband signal processing module to obtain a baseband signal and sending the obtained baseband signal to the transmission protocol processing module of the RAU.

4. The system of claim 1, wherein the first ODU comprises:

the transmitting intermediate frequency amplification module is used for performing band-pass filtering and low-noise amplification on the intermediate frequency analog signal of the first IDU from the RAU;

the transmitting and frequency mixing module is used for carrying out analog frequency mixing on the analog signals from the transmitting intermediate-frequency amplification module to obtain high-intermediate-frequency radio-frequency signals;

the transmitting band-pass filtering module is used for performing band-pass filtering on the radio-frequency signals from the transmitting frequency mixing module;

the power amplification module is used for carrying out power amplification on the radio-frequency signal from the transmitting band-pass filtering module;

the radio frequency attenuation module is used for performing gain attenuation on the radio frequency signal from the power amplification module and sending the obtained radio frequency signal to the second ODU;

the receiving band-pass filtering module is used for performing band-pass filtering on the radio-frequency signal from the second ODU;

the low-noise amplification module is used for performing low-noise amplification on the radio-frequency signal from the receiving band-pass filtering module;

the receiving and mixing module is used for carrying out analog mixing on the radio-frequency signal from the low-noise amplification module to obtain an analog signal;

the receiving filtering module is used for carrying out band-pass filtering on the analog signals from the receiving mixing module;

and the receiving intermediate frequency amplifying module is used for performing intermediate frequency amplification on the analog signal from the receiving filtering module to obtain an intermediate frequency analog signal and sending the obtained intermediate frequency analog signal to the first IDU of the RAU.

5. The system of claim 2, wherein the second ODU comprises:

the signaling band-pass filtering module is used for performing band-pass filtering on the radio frequency signal from the first ODU;

the low-noise amplification module is used for carrying out low-noise amplification on the radio-frequency signal from the transmitting band-pass filtering module;

the transmitting and frequency mixing module is used for carrying out analog frequency mixing on the radio-frequency signals from the low-noise amplification module to obtain analog signals;

the transmitting and filtering module is used for carrying out band-pass filtering on the analog signals from the transmitting and mixing module;

the transmitting intermediate-frequency amplification module is used for performing intermediate-frequency amplification on the analog signal from the transmitting filter module to obtain an intermediate-frequency analog signal and sending the obtained intermediate-frequency analog signal to a second IDU of the RRU;

the receiving intermediate frequency amplification module is used for performing band-pass filtering and low-noise amplification on an intermediate frequency analog signal of a second IDU from the RRU;

the receiving and frequency mixing module is used for carrying out analog frequency mixing on the analog signals from the receiving and intermediate frequency amplifying module to obtain high and intermediate frequency radio frequency signals;

the receiving band-pass filtering module is used for performing band-pass filtering on the radio-frequency signal from the receiving frequency mixing module;

the power amplification module is used for carrying out power amplification on the radio-frequency signal from the receiving band-pass filtering module;

and the radio frequency attenuation module is used for performing gain attenuation on the radio frequency signal from the power amplification module and sending the obtained radio frequency signal to the first ODU.

6. The system of claim 2, wherein the IDU of the RRU comprises:

the analog down-conversion module is used for performing analog down-conversion processing on the high-intermediate-frequency analog signal from the second ODU to obtain a low-intermediate-frequency analog signal;

the transmitting demodulation module is used for demodulating the zero intermediate frequency baseband signal from the digital down-conversion module;

the transmitting baseband signal processing module is used for carrying out interference elimination, de-interleaving and microwave frame de-framing processing on the signals from the transmitting demodulation module;

the signal transmitting source decoding module is used for performing source decoding on the signal from the signal transmitting baseband signal processing module to obtain a baseband signal and sending the obtained baseband signal to the transmission protocol processing module of the RRU;

the receiving signal source coding module is used for carrying out signal source coding on a baseband signal from the transmission protocol processing module of the RRU;

the receiving baseband signal processing module is used for scrambling, interweaving and framing the microwave frames of the signals from the receiving source coding module;

the receiving modulation module is used for modulating the signal from the receiving baseband signal processing module;

the digital up-conversion module is used for carrying out interpolation filtering and frequency mixing processing on the signals from the receiving modulation module to obtain low-intermediate frequency digital signals;

and the analog up-conversion module is configured to perform analog up-conversion processing on the low-intermediate-frequency analog signal from the digital-to-analog conversion module to obtain a high-intermediate-frequency analog signal, and send the high-intermediate-frequency analog signal to the second ODU.

7. The system of claim 1, further comprising: the security gateway is connected to the third IDU, the third IDU is connected to the third ODU, the RAU further comprises a fourth IDU, and the fourth IDU is connected to the fourth ODU;

8. The system of claim 7, wherein the third IDU comprises:

the signaling information source coding module is used for carrying out information source coding on the data and the signaling which pass the safety detection of the safety gateway;

the analog up-conversion module is used for performing analog up-conversion processing on the low-intermediate frequency analog signal from the digital-to-analog conversion module to obtain a high-intermediate frequency analog signal, and sending the high-intermediate frequency analog signal to a third ODU;

the analog down-conversion module is used for performing analog down-conversion on the high-intermediate-frequency analog signal from the third ODU to obtain a low-intermediate-frequency analog signal;

the signal receiving and signal source decoding module is used for carrying out signal source decoding on the signal from the signal receiving baseband signal processing module to obtain signaling and data and sending the obtained signaling and data to the signaling gateway;

the third ODU includes:

the transmitting intermediate frequency amplification module is used for performing band-pass filtering and low-noise amplification on the intermediate frequency analog signal from the third IDU;

the radio frequency attenuation module is used for performing gain attenuation on the radio frequency signal from the power amplification module and sending the obtained radio frequency signal to a fourth ODU;

the receiving band-pass filtering module is used for performing band-pass filtering on the radio frequency signal from the fourth ODU;

and the receiving intermediate frequency amplifying module is used for performing intermediate frequency amplification on the analog signal from the receiving filtering module to obtain an intermediate frequency analog signal and sending the obtained intermediate frequency analog signal to the third IDU.

9. The system of claim 7, wherein a fourth ODU comprises:

the signaling band-pass filtering module is used for performing band-pass filtering on the radio frequency signal from the third ODU;

the transmitting intermediate-frequency amplification module is used for performing intermediate-frequency amplification on the analog signal from the transmitting filter module to obtain an intermediate-frequency analog signal and sending the obtained intermediate-frequency analog signal to a fourth IDU of the RAU;

the receiving intermediate frequency amplifying module is used for performing band-pass filtering and low-noise amplification on the intermediate frequency analog signal of the fourth IDU from the RAU;

the radio frequency attenuation module is used for performing gain attenuation on the radio frequency signal from the power amplification module and sending the obtained radio frequency signal to a third ODU;

the fourth IDU of the RAU includes:

the analog down-conversion module is used for performing analog down-conversion processing on the high-intermediate-frequency analog signal from the fourth ODU to obtain a low-intermediate-frequency analog signal;

the transmitting signal source decoding module is used for carrying out signal source decoding on the signal from the transmitting baseband signal processing module to obtain a baseband signal and sending the obtained baseband signal to the RAU digital signal processing module;

the receiving source coding module is used for carrying out source coding on the baseband signal from the RAU digital signal processing module;

and the analog up-conversion module is configured to perform analog up-conversion processing on the low-intermediate-frequency analog signal from the digital-to-analog conversion module to obtain a high-intermediate-frequency analog signal, and send the high-intermediate-frequency analog signal to the fourth ODU.

10. The system of claim 1, wherein the signaling gateway is connected to the LTE core network via an S1-MME interface, wherein the security gateway is connected to the signaling gateway via an S1-MME interface, wherein the security gateway is connected to the LTE core network via an S1-U interface, wherein the RAU communicates with the signaling gateway via an S1-MME interface, and wherein the RAU is connected to the security gateway via an S1-U interface.

11. The system of claim 1, wherein the RAU is further configured for radio resource management, scheduling management, radio access control, and mobility management for communications of the MS;

the system also comprises a network management unit;

the network management unit realizes the functions of user interface management, user group management, software management, log management, system maintenance, parameter setting and alarm reporting of the signaling gateway, the security gateway, the RAU and the RRU.